223 files changed, 5678 insertions, 3322 deletions

diff --git a/Documentation/credentials.txt b/Documentation/credentials.txt
new file mode 100644
index 000000000000..df03169782ea
--- /dev/null
+++ b/Documentation/credentials.txt
@@ -0,0 +1,582 @@
+                             ====================
+                             CREDENTIALS IN LINUX
+                             ====================
+
+By: David Howells <dhowells@redhat.com>
+
+Contents:
+
+ (*) Overview.
+
+ (*) Types of credentials.
+
+ (*) File markings.
+
+ (*) Task credentials.
+
+     - Immutable credentials.
+     - Accessing task credentials.
+     - Accessing another task's credentials.
+     - Altering credentials.
+     - Managing credentials.
+
+ (*) Open file credentials.
+
+ (*) Overriding the VFS's use of credentials.
+
+
+========
+OVERVIEW
+========
+
+There are several parts to the security check performed by Linux when one
+object acts upon another:
+
+ (1) Objects.
+
+     Objects are things in the system that may be acted upon directly by
+     userspace programs.  Linux has a variety of actionable objects, including:
+
+        - Tasks
+        - Files/inodes
+        - Sockets
+        - Message queues
+        - Shared memory segments
+        - Semaphores
+        - Keys
+
+     As a part of the description of all these objects there is a set of
+     credentials.  What's in the set depends on the type of object.
+
+ (2) Object ownership.
+
+     Amongst the credentials of most objects, there will be a subset that
+     indicates the ownership of that object.  This is used for resource
+     accounting and limitation (disk quotas and task rlimits for example).
+
+     In a standard UNIX filesystem, for instance, this will be defined by the
+     UID marked on the inode.
+
+ (3) The objective context.
+
+     Also amongst the credentials of those objects, there will be a subset that
+     indicates the 'objective context' of that object.  This may or may not be
+     the same set as in (2) - in standard UNIX files, for instance, this is the
+     defined by the UID and the GID marked on the inode.
+
+     The objective context is used as part of the security calculation that is
+     carried out when an object is acted upon.
+
+ (4) Subjects.
+
+     A subject is an object that is acting upon another object.
+
+     Most of the objects in the system are inactive: they don't act on other
+     objects within the system.  Processes/tasks are the obvious exception:
+     they do stuff; they access and manipulate things.
+
+     Objects other than tasks may under some circumstances also be subjects.
+     For instance an open file may send SIGIO to a task using the UID and EUID
+     given to it by a task that called fcntl(F_SETOWN) upon it.  In this case,
+     the file struct will have a subjective context too.
+
+ (5) The subjective context.
+
+     A subject has an additional interpretation of its credentials.  A subset
+     of its credentials forms the 'subjective context'.  The subjective context
+     is used as part of the security calculation that is carried out when a
+     subject acts.
+
+     A Linux task, for example, has the FSUID, FSGID and the supplementary
+     group list for when it is acting upon a file - which are quite separate
+     from the real UID and GID that normally form the objective context of the
+     task.
+
+ (6) Actions.
+
+     Linux has a number of actions available that a subject may perform upon an
+     object.  The set of actions available depends on the nature of the subject
+     and the object.
+
+     Actions include reading, writing, creating and deleting files; forking or
+     signalling and tracing tasks.
+
+ (7) Rules, access control lists and security calculations.
+
+     When a subject acts upon an object, a security calculation is made.  This
+     involves taking the subjective context, the objective context and the
+     action, and searching one or more sets of rules to see whether the subject
+     is granted or denied permission to act in the desired manner on the
+     object, given those contexts.
+
+     There are two main sources of rules:
+
+     (a) Discretionary access control (DAC):
+
+         Sometimes the object will include sets of rules as part of its
+         description.  This is an 'Access Control List' or 'ACL'.  A Linux
+         file may supply more than one ACL.
+
+         A traditional UNIX file, for example, includes a permissions mask that
+         is an abbreviated ACL with three fixed classes of subject ('user',
+         'group' and 'other'), each of which may be granted certain privileges
+         ('read', 'write' and 'execute' - whatever those map to for the object
+         in question).  UNIX file permissions do not allow the arbitrary
+         specification of subjects, however, and so are of limited use.
+
+         A Linux file might also sport a POSIX ACL.  This is a list of rules
+         that grants various permissions to arbitrary subjects.
+
+     (b) Mandatory access control (MAC):
+
+         The system as a whole may have one or more sets of rules that get
+         applied to all subjects and objects, regardless of their source.
+         SELinux and Smack are examples of this.
+
+         In the case of SELinux and Smack, each object is given a label as part
+         of its credentials.  When an action is requested, they take the
+         subject label, the object label and the action and look for a rule
+         that says that this action is either granted or denied.
+
+
+====================
+TYPES OF CREDENTIALS
+====================
+
+The Linux kernel supports the following types of credentials:
+
+ (1) Traditional UNIX credentials.
+
+        Real User ID
+        Real Group ID
+
+     The UID and GID are carried by most, if not all, Linux objects, even if in
+     some cases it has to be invented (FAT or CIFS files for example, which are
+     derived from Windows).  These (mostly) define the objective context of
+     that object, with tasks being slightly different in some cases.
+
+        Effective, Saved and FS User ID
+        Effective, Saved and FS Group ID
+        Supplementary groups
+
+     These are additional credentials used by tasks only.  Usually, an
+     EUID/EGID/GROUPS will be used as the subjective context, and real UID/GID
+     will be used as the objective.  For tasks, it should be noted that this is
+     not always true.
+
+ (2) Capabilities.
+
+        Set of permitted capabilities
+        Set of inheritable capabilities
+        Set of effective capabilities
+        Capability bounding set
+
+     These are only carried by tasks.  They indicate superior capabilities
+     granted piecemeal to a task that an ordinary task wouldn't otherwise have.
+     These are manipulated implicitly by changes to the traditional UNIX
+     credentials, but can also be manipulated directly by the capset() system
+     call.
+
+     The permitted capabilities are those caps that the process might grant
+     itself to its effective or permitted sets through capset().  This
+     inheritable set might also be so constrained.
+
+     The effective capabilities are the ones that a task is actually allowed to
+     make use of itself.
+
+     The inheritable capabilities are the ones that may get passed across
+     execve().
+
+     The bounding set limits the capabilities that may be inherited across
+     execve(), especially when a binary is executed that will execute as UID 0.
+
+ (3) Secure management flags (securebits).
+
+     These are only carried by tasks.  These govern the way the above
+     credentials are manipulated and inherited over certain operations such as
+     execve().  They aren't used directly as objective or subjective
+     credentials.
+
+ (4) Keys and keyrings.
+
+     These are only carried by tasks.  They carry and cache security tokens
+     that don't fit into the other standard UNIX credentials.  They are for
+     making such things as network filesystem keys available to the file
+     accesses performed by processes, without the necessity of ordinary
+     programs having to know about security details involved.
+
+     Keyrings are a special type of key.  They carry sets of other keys and can
+     be searched for the desired key.  Each process may subscribe to a number
+     of keyrings:
+
+        Per-thread keying
+        Per-process keyring
+        Per-session keyring
+
+     When a process accesses a key, if not already present, it will normally be
+     cached on one of these keyrings for future accesses to find.
+
+     For more information on using keys, see Documentation/keys.txt.
+
+ (5) LSM
+
+     The Linux Security Module allows extra controls to be placed over the
+     operations that a task may do.  Currently Linux supports two main
+     alternate LSM options: SELinux and Smack.
+
+     Both work by labelling the objects in a system and then applying sets of
+     rules (policies) that say what operations a task with one label may do to
+     an object with another label.
+
+ (6) AF_KEY
+
+     This is a socket-based approach to credential management for networking
+     stacks [RFC 2367].  It isn't discussed by this document as it doesn't
+     interact directly with task and file credentials; rather it keeps system
+     level credentials.
+
+
+When a file is opened, part of the opening task's subjective context is
+recorded in the file struct created.  This allows operations using that file
+struct to use those credentials instead of the subjective context of the task
+that issued the operation.  An example of this would be a file opened on a
+network filesystem where the credentials of the opened file should be presented
+to the server, regardless of who is actually doing a read or a write upon it.
+
+
+=============
+FILE MARKINGS
+=============
+
+Files on disk or obtained over the network may have annotations that form the
+objective security context of that file.  Depending on the type of filesystem,
+this may include one or more of the following:
+
+ (*) UNIX UID, GID, mode;
+
+ (*) Windows user ID;
+
+ (*) Access control list;
+
+ (*) LSM security label;
+
+ (*) UNIX exec privilege escalation bits (SUID/SGID);
+
+ (*) File capabilities exec privilege escalation bits.
+
+These are compared to the task's subjective security context, and certain
+operations allowed or disallowed as a result.  In the case of execve(), the
+privilege escalation bits come into play, and may allow the resulting process
+extra privileges, based on the annotations on the executable file.
+
+
+================
+TASK CREDENTIALS
+================
+
+In Linux, all of a task's credentials are held in (uid, gid) or through
+(groups, keys, LSM security) a refcounted structure of type 'struct cred'.
+Each task points to its credentials by a pointer called 'cred' in its
+task_struct.
+
+Once a set of credentials has been prepared and committed, it may not be
+changed, barring the following exceptions:
+
+ (1) its reference count may be changed;
+
+ (2) the reference count on the group_info struct it points to may be changed;
+
+ (3) the reference count on the security data it points to may be changed;
+
+ (4) the reference count on any keyrings it points to may be changed;
+
+ (5) any keyrings it points to may be revoked, expired or have their security
+     attributes changed; and
+
+ (6) the contents of any keyrings to which it points may be changed (the whole
+     point of keyrings being a shared set of credentials, modifiable by anyone
+     with appropriate access).
+
+To alter anything in the cred struct, the copy-and-replace principle must be
+adhered to.  First take a copy, then alter the copy and then use RCU to change
+the task pointer to make it point to the new copy.  There are wrappers to aid
+with this (see below).
+
+A task may only alter its _own_ credentials; it is no longer permitted for a
+task to alter another's credentials.  This means the capset() system call is no
+longer permitted to take any PID other than the one of the current process.
+Also keyctl_instantiate() and keyctl_negate() functions no longer permit
+attachment to process-specific keyrings in the requesting process as the
+instantiating process may need to create them.
+
+
+IMMUTABLE CREDENTIALS
+---------------------
+
+Once a set of credentials has been made public (by calling commit_creds() for
+example), it must be considered immutable, barring two exceptions:
+
+ (1) The reference count may be altered.
+
+ (2) Whilst the keyring subscriptions of a set of credentials may not be
+     changed, the keyrings subscribed to may have their contents altered.
+
+To catch accidental credential alteration at compile time, struct task_struct
+has _const_ pointers to its credential sets, as does struct file.  Furthermore,
+certain functions such as get_cred() and put_cred() operate on const pointers,
+thus rendering casts unnecessary, but require to temporarily ditch the const
+qualification to be able to alter the reference count.
+
+
+ACCESSING TASK CREDENTIALS
+--------------------------
+
+A task being able to alter only its own credentials permits the current process
+to read or replace its own credentials without the need for any form of locking
+- which simplifies things greatly.  It can just call:
+
+        const struct cred *current_cred()
+
+to get a pointer to its credentials structure, and it doesn't have to release
+it afterwards.
+
+There are convenience wrappers for retrieving specific aspects of a task's
+credentials (the value is simply returned in each case):
+
+        uid_t current_uid(void)         Current's real UID
+        gid_t current_gid(void)         Current's real GID
+        uid_t current_euid(void)        Current's effective UID
+        gid_t current_egid(void)        Current's effective GID
+        uid_t current_fsuid(void)       Current's file access UID
+        gid_t current_fsgid(void)       Current's file access GID
+        kernel_cap_t current_cap(void)  Current's effective capabilities
+        void *current_security(void)    Current's LSM security pointer
+        struct user_struct *current_user(void)  Current's user account
+
+There are also convenience wrappers for retrieving specific associated pairs of
+a task's credentials:
+
+        void current_uid_gid(uid_t *, gid_t *);
+        void current_euid_egid(uid_t *, gid_t *);
+        void current_fsuid_fsgid(uid_t *, gid_t *);
+
+which return these pairs of values through their arguments after retrieving
+them from the current task's credentials.
+
+
+In addition, there is a function for obtaining a reference on the current
+process's current set of credentials:
+
+        const struct cred *get_current_cred(void);
+
+and functions for getting references to one of the credentials that don't
+actually live in struct cred:
+
+        struct user_struct *get_current_user(void);
+        struct group_info *get_current_groups(void);
+
+which get references to the current process's user accounting structure and
+supplementary groups list respectively.
+
+Once a reference has been obtained, it must be released with put_cred(),
+free_uid() or put_group_info() as appropriate.
+
+
+ACCESSING ANOTHER TASK'S CREDENTIALS
+------------------------------------
+
+Whilst a task may access its own credentials without the need for locking, the
+same is not true of a task wanting to access another task's credentials.  It
+must use the RCU read lock and rcu_dereference().
+
+The rcu_dereference() is wrapped by:
+
+        const struct cred *__task_cred(struct task_struct *task);
+
+This should be used inside the RCU read lock, as in the following example:
+
+        void foo(struct task_struct *t, struct foo_data *f)
+        {
+                const struct cred *tcred;
+                ...
+                rcu_read_lock();
+                tcred = __task_cred(t);
+                f->uid = tcred->uid;
+                f->gid = tcred->gid;
+                f->groups = get_group_info(tcred->groups);
+                rcu_read_unlock();
+                ...
+        }
+
+A function need not get RCU read lock to use __task_cred() if it is holding a
+spinlock at the time as this implicitly holds the RCU read lock.
+
+Should it be necessary to hold another task's credentials for a long period of
+time, and possibly to sleep whilst doing so, then the caller should get a
+reference on them using:
+
+        const struct cred *get_task_cred(struct task_struct *task);
+
+This does all the RCU magic inside of it.  The caller must call put_cred() on
+the credentials so obtained when they're finished with.
+
+There are a couple of convenience functions to access bits of another task's
+credentials, hiding the RCU magic from the caller:
+
+        uid_t task_uid(task)            Task's real UID
+        uid_t task_euid(task)           Task's effective UID
+
+If the caller is holding a spinlock or the RCU read lock at the time anyway,
+then:
+
+        __task_cred(task)->uid
+        __task_cred(task)->euid
+
+should be used instead.  Similarly, if multiple aspects of a task's credentials
+need to be accessed, RCU read lock or a spinlock should be used, __task_cred()
+called, the result stored in a temporary pointer and then the credential
+aspects called from that before dropping the lock.  This prevents the
+potentially expensive RCU magic from being invoked multiple times.
+
+Should some other single aspect of another task's credentials need to be
+accessed, then this can be used:
+
+        task_cred_xxx(task, member)
+
+where 'member' is a non-pointer member of the cred struct.  For instance:
+
+        uid_t task_cred_xxx(task, suid);
+
+will retrieve 'struct cred::suid' from the task, doing the appropriate RCU
+magic.  This may not be used for pointer members as what they point to may
+disappear the moment the RCU read lock is dropped.
+
+
+ALTERING CREDENTIALS
+--------------------
+
+As previously mentioned, a task may only alter its own credentials, and may not
+alter those of another task.  This means that it doesn't need to use any
+locking to alter its own credentials.
+
+To alter the current process's credentials, a function should first prepare a
+new set of credentials by calling:
+
+        struct cred *prepare_creds(void);
+
+this locks current->cred_replace_mutex and then allocates and constructs a
+duplicate of the current process's credentials, returning with the mutex still
+held if successful.  It returns NULL if not successful (out of memory).
+
+The mutex prevents ptrace() from altering the ptrace state of a process whilst
+security checks on credentials construction and changing is taking place as
+the ptrace state may alter the outcome, particularly in the case of execve().
+
+The new credentials set should be altered appropriately, and any security
+checks and hooks done.  Both the current and the proposed sets of credentials
+are available for this purpose as current_cred() will return the current set
+still at this point.
+
+
+When the credential set is ready, it should be committed to the current process
+by calling:
+
+        int commit_creds(struct cred *new);
+
+This will alter various aspects of the credentials and the process, giving the
+LSM a chance to do likewise, then it will use rcu_assign_pointer() to actually
+commit the new credentials to current->cred, it will release
+current->cred_replace_mutex to allow ptrace() to take place, and it will notify
+the scheduler and others of the changes.
+
+This function is guaranteed to return 0, so that it can be tail-called at the
+end of such functions as sys_setresuid().
+
+Note that this function consumes the caller's reference to the new credentials.
+The caller should _not_ call put_cred() on the new credentials afterwards.
+
+Furthermore, once this function has been called on a new set of credentials,
+those credentials may _not_ be changed further.
+
+
+Should the security checks fail or some other error occur after prepare_creds()
+has been called, then the following function should be invoked:
+
+        void abort_creds(struct cred *new);
+
+This releases the lock on current->cred_replace_mutex that prepare_creds() got
+and then releases the new credentials.
+
+
+A typical credentials alteration function would look something like this:
+
+        int alter_suid(uid_t suid)
+        {
+                struct cred *new;
+                int ret;
+
+                new = prepare_creds();
+                if (!new)
+                        return -ENOMEM;
+
+                new->suid = suid;
+                ret = security_alter_suid(new);
+                if (ret < 0) {
+                        abort_creds(new);
+                        return ret;
+                }
+
+                return commit_creds(new);
+        }
+
+
+MANAGING CREDENTIALS
+--------------------
+
+There are some functions to help manage credentials:
+
+ (*) void put_cred(const struct cred *cred);
+
+     This releases a reference to the given set of credentials.  If the
+     reference count reaches zero, the credentials will be scheduled for
+     destruction by the RCU system.
+
+ (*) const struct cred *get_cred(const struct cred *cred);
+
+     This gets a reference on a live set of credentials, returning a pointer to
+     that set of credentials.
+
+ (*) struct cred *get_new_cred(struct cred *cred);
+
+     This gets a reference on a set of credentials that is under construction
+     and is thus still mutable, returning a pointer to that set of credentials.
+
+
+=====================
+OPEN FILE CREDENTIALS
+=====================
+
+When a new file is opened, a reference is obtained on the opening task's
+credentials and this is attached to the file struct as 'f_cred' in place of
+'f_uid' and 'f_gid'.  Code that used to access file->f_uid and file->f_gid
+should now access file->f_cred->fsuid and file->f_cred->fsgid.
+
+It is safe to access f_cred without the use of RCU or locking because the
+pointer will not change over the lifetime of the file struct, and nor will the
+contents of the cred struct pointed to, barring the exceptions listed above
+(see the Task Credentials section).
+
+
+=======================================
+OVERRIDING THE VFS'S USE OF CREDENTIALS
+=======================================
+
+Under some circumstances it is desirable to override the credentials used by
+the VFS, and that can be done by calling into such as vfs_mkdir() with a
+different set of credentials.  This is done in the following places:
+
+ (*) sys_faccessat().
+
+ (*) do_coredump().
+
+ (*) nfs4recover.c.
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index c9115c1b672c..bffffa4e8ee9 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -1452,6 +1452,10 @@ and is between 256 and 4096 characters. It is defined in the file
                         instruction doesn't work correctly and not to
                         use it.
 
+        no_file_caps    Tells the kernel not to honor file capabilities.  The
+                        only way then for a file to be executed with privilege
+                        is to be setuid root or executed by root.
+
         nohalt          [IA-64] Tells the kernel not to use the power saving
                         function PAL_HALT_LIGHT when idle. This increases
                         power-consumption. On the positive side, it reduces
diff --git a/Documentation/scheduler/sched-design-CFS.txt b/Documentation/scheduler/sched-design-CFS.txt
index eb471c7a905e..8398ca4ff4ed 100644
--- a/Documentation/scheduler/sched-design-CFS.txt
+++ b/Documentation/scheduler/sched-design-CFS.txt
@@ -273,3 +273,24 @@ task groups and modify their CPU share using the "cgroups" pseudo filesystem.
 
         # #Launch gmplayer (or your favourite movie player)
         # echo <movie_player_pid> > multimedia/tasks
+
+8. Implementation note: user namespaces
+
+User namespaces are intended to be hierarchical.  But they are currently
+only partially implemented.  Each of those has ramifications for CFS.
+
+First, since user namespaces are hierarchical, the /sys/kernel/uids
+presentation is inadequate.  Eventually we will likely want to use sysfs
+tagging to provide private views of /sys/kernel/uids within each user
+namespace.
+
+Second, the hierarchical nature is intended to support completely
+unprivileged use of user namespaces.  So if using user groups, then
+we want the users in a user namespace to be children of the user
+who created it.
+
+That is currently unimplemented.  So instead, every user in a new
+user namespace will receive 1024 shares just like any user in the
+initial user namespace.  Note that at the moment creation of a new
+user namespace requires each of CAP_SYS_ADMIN, CAP_SETUID, and
+CAP_SETGID.
diff --git a/arch/alpha/kernel/asm-offsets.c b/arch/alpha/kernel/asm-offsets.c
index 4b18cd94d59d..6ff8886e7e22 100644
--- a/arch/alpha/kernel/asm-offsets.c
+++ b/arch/alpha/kernel/asm-offsets.c
@@ -19,15 +19,18 @@ void foo(void)
         BLANK();
 
         DEFINE(TASK_BLOCKED, offsetof(struct task_struct, blocked));
-        DEFINE(TASK_UID, offsetof(struct task_struct, uid));
-        DEFINE(TASK_EUID, offsetof(struct task_struct, euid));
-        DEFINE(TASK_GID, offsetof(struct task_struct, gid));
-        DEFINE(TASK_EGID, offsetof(struct task_struct, egid));
+        DEFINE(TASK_CRED, offsetof(struct task_struct, cred));
         DEFINE(TASK_REAL_PARENT, offsetof(struct task_struct, real_parent));
         DEFINE(TASK_GROUP_LEADER, offsetof(struct task_struct, group_leader));
         DEFINE(TASK_TGID, offsetof(struct task_struct, tgid));
         BLANK();
 
+        DEFINE(CRED_UID,  offsetof(struct cred, uid));
+        DEFINE(CRED_EUID, offsetof(struct cred, euid));
+        DEFINE(CRED_GID,  offsetof(struct cred, gid));
+        DEFINE(CRED_EGID, offsetof(struct cred, egid));
+        BLANK();
+
         DEFINE(SIZEOF_PT_REGS, sizeof(struct pt_regs));
         DEFINE(PT_PTRACED, PT_PTRACED);
         DEFINE(CLONE_VM, CLONE_VM);
diff --git a/arch/alpha/kernel/entry.S b/arch/alpha/kernel/entry.S
index 5fc61e281ac7..f77345bc66a9 100644
--- a/arch/alpha/kernel/entry.S
+++ b/arch/alpha/kernel/entry.S
@@ -850,8 +850,9 @@ osf_getpriority:
 sys_getxuid:
         .prologue 0
         ldq     $2, TI_TASK($8)
-        ldl     $0, TASK_UID($2)
-        ldl     $1, TASK_EUID($2)
+        ldq     $3, TASK_CRED($2)
+        ldl     $0, CRED_UID($3)
+        ldl     $1, CRED_EUID($3)
         stq     $1, 80($sp)
         ret
 .end sys_getxuid
@@ -862,8 +863,9 @@ sys_getxuid:
 sys_getxgid:
         .prologue 0
         ldq     $2, TI_TASK($8)
-        ldl     $0, TASK_GID($2)
-        ldl     $1, TASK_EGID($2)
+        ldq     $3, TASK_CRED($2)
+        ldl     $0, CRED_GID($3)
+        ldl     $1, CRED_EGID($3)
         stq     $1, 80($sp)
         ret
 .end sys_getxgid
diff --git a/arch/ia64/ia32/sys_ia32.c b/arch/ia64/ia32/sys_ia32.c
index 5e92ae00bdbb..16ef61a91d95 100644
--- a/arch/ia64/ia32/sys_ia32.c
+++ b/arch/ia64/ia32/sys_ia32.c
@@ -1767,25 +1767,24 @@ groups16_from_user(struct group_info *group_info, short __user *grouplist)
 asmlinkage long
 sys32_getgroups16 (int gidsetsize, short __user *grouplist)
 {
+        const struct cred *cred = current_cred();
         int i;
 
         if (gidsetsize < 0)
                 return -EINVAL;
 
-        get_group_info(current->group_info);
-        i = current->group_info->ngroups;
+        i = cred->group_info->ngroups;
         if (gidsetsize) {
                 if (i > gidsetsize) {
                         i = -EINVAL;
                         goto out;
                 }
-                if (groups16_to_user(grouplist, current->group_info)) {
+                if (groups16_to_user(grouplist, cred->group_info)) {
                         i = -EFAULT;
                         goto out;
                 }
         }
 out:
-        put_group_info(current->group_info);
         return i;
 }
 
diff --git a/arch/ia64/kernel/mca_drv.c b/arch/ia64/kernel/mca_drv.c
index fab1d21a4f2c..f94aaa86933f 100644
--- a/arch/ia64/kernel/mca_drv.c
+++ b/arch/ia64/kernel/mca_drv.c
@@ -158,7 +158,7 @@ mca_handler_bh(unsigned long paddr, void *iip, unsigned long ipsr)
         ia64_mlogbuf_dump();
         printk(KERN_ERR "OS_MCA: process [cpu %d, pid: %d, uid: %d, "
                 "iip: %p, psr: 0x%lx,paddr: 0x%lx](%s) encounters MCA.\n",
-                raw_smp_processor_id(), current->pid, current->uid,
+               raw_smp_processor_id(), current->pid, current_uid(),
                 iip, ipsr, paddr, current->comm);
 
         spin_lock(&mca_bh_lock);
diff --git a/arch/ia64/kernel/perfmon.c b/arch/ia64/kernel/perfmon.c
index 6543a5547c84..0e499757309b 100644
--- a/arch/ia64/kernel/perfmon.c
+++ b/arch/ia64/kernel/perfmon.c
@@ -2220,8 +2220,8 @@ pfm_alloc_file(pfm_context_t *ctx)
         DPRINT(("new inode ino=%ld @%p\n", inode->i_ino, inode));
 
         inode->i_mode = S_IFCHR|S_IRUGO;
-        inode->i_uid  = current->fsuid;
-        inode->i_gid  = current->fsgid;
+        inode->i_uid  = current_fsuid();
+        inode->i_gid  = current_fsgid();
 
         sprintf(name, "[%lu]", inode->i_ino);
         this.name = name;
@@ -2399,22 +2399,33 @@ error_kmem:
 static int
 pfm_bad_permissions(struct task_struct *task)
 {
+        const struct cred *tcred;
+        uid_t uid = current_uid();
+        gid_t gid = current_gid();
+        int ret;
+
+        rcu_read_lock();
+        tcred = __task_cred(task);
+
         /* inspired by ptrace_attach() */
         DPRINT(("cur: uid=%d gid=%d task: euid=%d suid=%d uid=%d egid=%d sgid=%d\n",
-                current->uid,
-                current->gid,
-                task->euid,
-                task->suid,
-                task->uid,
-                task->egid,
-                task->sgid));
-
-        return ((current->uid != task->euid)
-            || (current->uid != task->suid)
-            || (current->uid != task->uid)
-            || (current->gid != task->egid)
-            || (current->gid != task->sgid)
-            || (current->gid != task->gid)) && !capable(CAP_SYS_PTRACE);
+                uid,
+                gid,
+                tcred->euid,
+                tcred->suid,
+                tcred->uid,
+                tcred->egid,
+                tcred->sgid));
+
+        ret = ((uid != tcred->euid)
+               || (uid != tcred->suid)
+               || (uid != tcred->uid)
+               || (gid != tcred->egid)
+               || (gid != tcred->sgid)
+               || (gid != tcred->gid)) && !capable(CAP_SYS_PTRACE);
+
+        rcu_read_unlock();
+        return ret;
 }
 
 static int
diff --git a/arch/ia64/kernel/signal.c b/arch/ia64/kernel/signal.c
index e12500a9c443..e1821ca4c7df 100644
--- a/arch/ia64/kernel/signal.c
+++ b/arch/ia64/kernel/signal.c
@@ -229,7 +229,7 @@ ia64_rt_sigreturn (struct sigscratch *scr)
         si.si_errno = 0;
         si.si_code = SI_KERNEL;
         si.si_pid = task_pid_vnr(current);
-        si.si_uid = current->uid;
+        si.si_uid = current_uid();
         si.si_addr = sc;
         force_sig_info(SIGSEGV, &si, current);
         return retval;
@@ -326,7 +326,7 @@ force_sigsegv_info (int sig, void __user *addr)
         si.si_errno = 0;
         si.si_code = SI_KERNEL;
         si.si_pid = task_pid_vnr(current);
-        si.si_uid = current->uid;
+        si.si_uid = current_uid();
         si.si_addr = addr;
         force_sig_info(SIGSEGV, &si, current);
         return 0;
diff --git a/arch/mips/kernel/kspd.c b/arch/mips/kernel/kspd.c
index b0591ae0ce56..fd6e51224034 100644
--- a/arch/mips/kernel/kspd.c
+++ b/arch/mips/kernel/kspd.c
@@ -174,8 +174,8 @@ static unsigned int translate_open_flags(int flags)
 
 static void sp_setfsuidgid( uid_t uid, gid_t gid)
 {
-        current->fsuid = uid;
-        current->fsgid = gid;
+        current->cred->fsuid = uid;
+        current->cred->fsgid = gid;
 
         key_fsuid_changed(current);
         key_fsgid_changed(current);
diff --git a/arch/mips/kernel/mips-mt-fpaff.c b/arch/mips/kernel/mips-mt-fpaff.c
index dc9eb72ed9de..5e77a3a21f98 100644
--- a/arch/mips/kernel/mips-mt-fpaff.c
+++ b/arch/mips/kernel/mips-mt-fpaff.c
@@ -51,6 +51,7 @@ asmlinkage long mipsmt_sys_sched_setaffinity(pid_t pid, unsigned int len,
         int retval;
         struct task_struct *p;
         struct thread_info *ti;
+        uid_t euid;
 
         if (len < sizeof(new_mask))
                 return -EINVAL;
@@ -76,9 +77,9 @@ asmlinkage long mipsmt_sys_sched_setaffinity(pid_t pid, unsigned int len,
          */
         get_task_struct(p);
 
+        euid = current_euid();
         retval = -EPERM;
-        if ((current->euid != p->euid) && (current->euid != p->uid) &&
-                        !capable(CAP_SYS_NICE)) {
+        if (euid != p->euid && euid != p->uid && !capable(CAP_SYS_NICE)) {
                 read_unlock(&tasklist_lock);
                 goto out_unlock;
         }
diff --git a/arch/mips/kernel/vpe.c b/arch/mips/kernel/vpe.c
index a1b3da6bad5c..010b27e01f7b 100644
--- a/arch/mips/kernel/vpe.c
+++ b/arch/mips/kernel/vpe.c
@@ -1085,8 +1085,8 @@ static int vpe_open(struct inode *inode, struct file *filp)
         v->load_addr = NULL;
         v->len = 0;
 
-        v->uid = filp->f_uid;
-        v->gid = filp->f_gid;
+        v->uid = filp->f_cred->fsuid;
+        v->gid = filp->f_cred->fsgid;
 
 #ifdef CONFIG_MIPS_APSP_KSPD
         /* get kspd to tell us when a syscall_exit happens */
diff --git a/arch/parisc/kernel/signal.c b/arch/parisc/kernel/signal.c
index 06213d1d6d95..f82544225e8e 100644
--- a/arch/parisc/kernel/signal.c
+++ b/arch/parisc/kernel/signal.c
@@ -182,7 +182,7 @@ give_sigsegv:
         si.si_errno = 0;
         si.si_code = SI_KERNEL;
         si.si_pid = task_pid_vnr(current);
-        si.si_uid = current->uid;
+        si.si_uid = current_uid();
         si.si_addr = &frame->uc;
         force_sig_info(SIGSEGV, &si, current);
         return;
diff --git a/arch/powerpc/mm/fault.c b/arch/powerpc/mm/fault.c
index 565b7a237c84..866098686da8 100644
--- a/arch/powerpc/mm/fault.c
+++ b/arch/powerpc/mm/fault.c
@@ -339,7 +339,7 @@ bad_area_nosemaphore:
             && printk_ratelimit())
                 printk(KERN_CRIT "kernel tried to execute NX-protected"
                        " page (%lx) - exploit attempt? (uid: %d)\n",
-                       address, current->uid);
+                       address, current_uid());
 
         return SIGSEGV;
 
diff --git a/arch/powerpc/platforms/cell/spufs/inode.c b/arch/powerpc/platforms/cell/spufs/inode.c
index cb85d237e492..6296bfd9cb0b 100644
--- a/arch/powerpc/platforms/cell/spufs/inode.c
+++ b/arch/powerpc/platforms/cell/spufs/inode.c
@@ -95,8 +95,8 @@ spufs_new_inode(struct super_block *sb, int mode)
                 goto out;
 
         inode->i_mode = mode;
-        inode->i_uid = current->fsuid;
-        inode->i_gid = current->fsgid;
+        inode->i_uid = current_fsuid();
+        inode->i_gid = current_fsgid();
         inode->i_blocks = 0;
         inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
 out:
@@ -323,7 +323,7 @@ static int spufs_context_open(struct dentry *dentry, struct vfsmount *mnt)
                 goto out;
         }
 
-        filp = dentry_open(dentry, mnt, O_RDONLY);
+        filp = dentry_open(dentry, mnt, O_RDONLY, current_cred());
         if (IS_ERR(filp)) {
                 put_unused_fd(ret);
                 ret = PTR_ERR(filp);
@@ -562,7 +562,7 @@ static int spufs_gang_open(struct dentry *dentry, struct vfsmount *mnt)
                 goto out;
         }
 
-        filp = dentry_open(dentry, mnt, O_RDONLY);
+        filp = dentry_open(dentry, mnt, O_RDONLY, current_cred());
         if (IS_ERR(filp)) {
                 put_unused_fd(ret);
                 ret = PTR_ERR(filp);
diff --git a/arch/s390/hypfs/inode.c b/arch/s390/hypfs/inode.c
index 36313801cd5c..8aadcd7a7cf8 100644
--- a/arch/s390/hypfs/inode.c
+++ b/arch/s390/hypfs/inode.c
@@ -280,8 +280,8 @@ static int hypfs_fill_super(struct super_block *sb, void *data, int silent)
         if (!sbi)
                 return -ENOMEM;
         mutex_init(&sbi->lock);
-        sbi->uid = current->uid;
-        sbi->gid = current->gid;
+        sbi->uid = current_uid();
+        sbi->gid = current_gid();
         sb->s_fs_info = sbi;
         sb->s_blocksize = PAGE_CACHE_SIZE;
         sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
diff --git a/arch/s390/kernel/compat_linux.c b/arch/s390/kernel/compat_linux.c
index 4646382af34f..6cc87d8c8682 100644
--- a/arch/s390/kernel/compat_linux.c
+++ b/arch/s390/kernel/compat_linux.c
@@ -148,9 +148,9 @@ asmlinkage long sys32_getresuid16(u16 __user *ruid, u16 __user *euid, u16 __user
 {
         int retval;
 
-        if (!(retval = put_user(high2lowuid(current->uid), ruid)) &&
-            !(retval = put_user(high2lowuid(current->euid), euid)))
-                retval = put_user(high2lowuid(current->suid), suid);
+        if (!(retval = put_user(high2lowuid(current->cred->uid), ruid)) &&
+            !(retval = put_user(high2lowuid(current->cred->euid), euid)))
+                retval = put_user(high2lowuid(current->cred->suid), suid);
 
         return retval;
 }
@@ -165,9 +165,9 @@ asmlinkage long sys32_getresgid16(u16 __user *rgid, u16 __user *egid, u16 __user
 {
         int retval;
 
-        if (!(retval = put_user(high2lowgid(current->gid), rgid)) &&
-            !(retval = put_user(high2lowgid(current->egid), egid)))
-                retval = put_user(high2lowgid(current->sgid), sgid);
+        if (!(retval = put_user(high2lowgid(current->cred->gid), rgid)) &&
+            !(retval = put_user(high2lowgid(current->cred->egid), egid)))
+                retval = put_user(high2lowgid(current->cred->sgid), sgid);
 
         return retval;
 }
@@ -217,20 +217,20 @@ asmlinkage long sys32_getgroups16(int gidsetsize, u16 __user *grouplist)
         if (gidsetsize < 0)
                 return -EINVAL;
 
-        get_group_info(current->group_info);
-        i = current->group_info->ngroups;
+        get_group_info(current->cred->group_info);
+        i = current->cred->group_info->ngroups;
         if (gidsetsize) {
                 if (i > gidsetsize) {
                         i = -EINVAL;
                         goto out;
                 }
-                if (groups16_to_user(grouplist, current->group_info)) {
+                if (groups16_to_user(grouplist, current->cred->group_info)) {
                         i = -EFAULT;
                         goto out;
                 }
         }
 out:
-        put_group_info(current->group_info);
+        put_group_info(current->cred->group_info);
         return i;
 }
 
@@ -261,22 +261,22 @@ asmlinkage long sys32_setgroups16(int gidsetsize, u16 __user *grouplist)
 
 asmlinkage long sys32_getuid16(void)
 {
-        return high2lowuid(current->uid);
+        return high2lowuid(current->cred->uid);
 }
 
 asmlinkage long sys32_geteuid16(void)
 {
-        return high2lowuid(current->euid);
+        return high2lowuid(current->cred->euid);
 }
 
 asmlinkage long sys32_getgid16(void)
 {
-        return high2lowgid(current->gid);
+        return high2lowgid(current->cred->gid);
 }
 
 asmlinkage long sys32_getegid16(void)
 {
-        return high2lowgid(current->egid);
+        return high2lowgid(current->cred->egid);
 }
 
 /*
diff --git a/arch/um/drivers/mconsole_kern.c b/arch/um/drivers/mconsole_kern.c
index 8f44ebb0dec8..e14629c87de4 100644
--- a/arch/um/drivers/mconsole_kern.c
+++ b/arch/um/drivers/mconsole_kern.c
@@ -161,7 +161,8 @@ void mconsole_proc(struct mc_request *req)
                 goto out_kill;
         }
 
-        file = dentry_open(nd.path.dentry, nd.path.mnt, O_RDONLY);
+        file = dentry_open(nd.path.dentry, nd.path.mnt, O_RDONLY,
+                           current_cred());
         if (IS_ERR(file)) {
                 mconsole_reply(req, "Failed to open file", 1, 0);
                 goto out_kill;
diff --git a/arch/x86/ia32/ia32_aout.c b/arch/x86/ia32/ia32_aout.c
index 127ec3f07214..2a4d073d2cf1 100644
--- a/arch/x86/ia32/ia32_aout.c
+++ b/arch/x86/ia32/ia32_aout.c
@@ -327,7 +327,7 @@ static int load_aout_binary(struct linux_binprm *bprm, struct pt_regs *regs)
         current->mm->cached_hole_size = 0;
 
         current->mm->mmap = NULL;
-        compute_creds(bprm);
+        install_exec_creds(bprm);
         current->flags &= ~PF_FORKNOEXEC;
 
         if (N_MAGIC(ex) == OMAGIC) {
diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index 31e8730fa246..3a1b6ef4f05d 100644
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -393,7 +393,7 @@ static void show_fault_oops(struct pt_regs *regs, unsigned long error_code,
                 if (pte && pte_present(*pte) && !pte_exec(*pte))
                         printk(KERN_CRIT "kernel tried to execute "
                                 "NX-protected page - exploit attempt? "
-                                "(uid: %d)\n", current->uid);
+                                "(uid: %d)\n", current_uid());
         }
 #endif
 
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 5c4ee70d5cf3..fb06ed659212 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -936,8 +936,10 @@ loop_set_status(struct loop_device *lo, const struct loop_info64 *info)
 {
         int err;
         struct loop_func_table *xfer;
+        uid_t uid = current_uid();
 
-        if (lo->lo_encrypt_key_size && lo->lo_key_owner != current->uid &&
+        if (lo->lo_encrypt_key_size &&
+            lo->lo_key_owner != uid &&
             !capable(CAP_SYS_ADMIN))
                 return -EPERM;
         if (lo->lo_state != Lo_bound)
@@ -992,7 +994,7 @@ loop_set_status(struct loop_device *lo, const struct loop_info64 *info)
         if (info->lo_encrypt_key_size) {
                 memcpy(lo->lo_encrypt_key, info->lo_encrypt_key,
                        info->lo_encrypt_key_size);
-                lo->lo_key_owner = current->uid;
+                lo->lo_key_owner = uid;
         }       
 
         return 0;
diff --git a/drivers/char/tty_audit.c b/drivers/char/tty_audit.c
index 5787249934c8..34ab6d798f81 100644
--- a/drivers/char/tty_audit.c
+++ b/drivers/char/tty_audit.c
@@ -67,6 +67,29 @@ static void tty_audit_buf_put(struct tty_audit_buf *buf)
                 tty_audit_buf_free(buf);
 }
 
+static void tty_audit_log(const char *description, struct task_struct *tsk,
+                          uid_t loginuid, unsigned sessionid, int major,
+                          int minor, unsigned char *data, size_t size)
+{
+        struct audit_buffer *ab;
+
+        ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_TTY);
+        if (ab) {
+                char name[sizeof(tsk->comm)];
+                uid_t uid = task_uid(tsk);
+
+                audit_log_format(ab, "%s pid=%u uid=%u auid=%u ses=%u "
+                                 "major=%d minor=%d comm=", description,
+                                 tsk->pid, uid, loginuid, sessionid,
+                                 major, minor);
+                get_task_comm(name, tsk);
+                audit_log_untrustedstring(ab, name);
+                audit_log_format(ab, " data=");
+                audit_log_n_hex(ab, data, size);
+                audit_log_end(ab);
+        }
+}
+
 /**
  *      tty_audit_buf_push      -       Push buffered data out
  *
@@ -77,25 +100,12 @@ static void tty_audit_buf_push(struct task_struct *tsk, uid_t loginuid,
                                unsigned int sessionid,
                                struct tty_audit_buf *buf)
 {
-        struct audit_buffer *ab;
-
         if (buf->valid == 0)
                 return;
         if (audit_enabled == 0)
                 return;
-        ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_TTY);
-        if (ab) {
-                char name[sizeof(tsk->comm)];
-
-                audit_log_format(ab, "tty pid=%u uid=%u auid=%u ses=%u "
-                                 "major=%d minor=%d comm=", tsk->pid, tsk->uid,
-                                 loginuid, sessionid, buf->major, buf->minor);
-                get_task_comm(name, tsk);
-                audit_log_untrustedstring(ab, name);
-                audit_log_format(ab, " data=");
-                audit_log_n_hex(ab, buf->data, buf->valid);
-                audit_log_end(ab);
-        }
+        tty_audit_log("tty", tsk, loginuid, sessionid, buf->major, buf->minor,
+                      buf->data, buf->valid);
         buf->valid = 0;
 }
 
@@ -150,6 +160,42 @@ void tty_audit_fork(struct signal_struct *sig)
 }
 
 /**
+ *      tty_audit_tiocsti       -       Log TIOCSTI
+ */
+void tty_audit_tiocsti(struct tty_struct *tty, char ch)
+{
+        struct tty_audit_buf *buf;
+        int major, minor, should_audit;
+
+        spin_lock_irq(&current->sighand->siglock);
+        should_audit = current->signal->audit_tty;
+        buf = current->signal->tty_audit_buf;
+        if (buf)
+                atomic_inc(&buf->count);
+        spin_unlock_irq(&current->sighand->siglock);
+
+        major = tty->driver->major;
+        minor = tty->driver->minor_start + tty->index;
+        if (buf) {
+                mutex_lock(&buf->mutex);
+                if (buf->major == major && buf->minor == minor)
+                        tty_audit_buf_push_current(buf);
+                mutex_unlock(&buf->mutex);
+                tty_audit_buf_put(buf);
+        }
+
+        if (should_audit && audit_enabled) {
+                uid_t auid;
+                unsigned int sessionid;
+
+                auid = audit_get_loginuid(current);
+                sessionid = audit_get_sessionid(current);
+                tty_audit_log("ioctl=TIOCSTI", current, auid, sessionid, major,
+                              minor, &ch, 1);
+        }
+}
+
+/**
  *      tty_audit_push_task     -       Flush task's pending audit data
  */
 void tty_audit_push_task(struct task_struct *tsk, uid_t loginuid, u32 sessionid)
diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c
index 1412a8d1e58d..db15f9ba7c0b 100644
--- a/drivers/char/tty_io.c
+++ b/drivers/char/tty_io.c
@@ -2018,6 +2018,7 @@ static int tiocsti(struct tty_struct *tty, char __user *p)
                 return -EPERM;
         if (get_user(ch, p))
                 return -EFAULT;
+        tty_audit_tiocsti(tty, ch);
         ld = tty_ldisc_ref_wait(tty);
         ld->ops->receive_buf(tty, &ch, &mbz, 1);
         tty_ldisc_deref(ld);
diff --git a/drivers/connector/cn_proc.c b/drivers/connector/cn_proc.c
index 5c9f67f98d10..c5afc98e2675 100644
--- a/drivers/connector/cn_proc.c
+++ b/drivers/connector/cn_proc.c
@@ -106,6 +106,7 @@ void proc_id_connector(struct task_struct *task, int which_id)
         struct proc_event *ev;
         __u8 buffer[CN_PROC_MSG_SIZE];
         struct timespec ts;
+        const struct cred *cred;
 
         if (atomic_read(&proc_event_num_listeners) < 1)
                 return;
@@ -115,14 +116,19 @@ void proc_id_connector(struct task_struct *task, int which_id)
         ev->what = which_id;
         ev->event_data.id.process_pid = task->pid;
         ev->event_data.id.process_tgid = task->tgid;
+        rcu_read_lock();
+        cred = __task_cred(task);
         if (which_id == PROC_EVENT_UID) {
-                ev->event_data.id.r.ruid = task->uid;
-                ev->event_data.id.e.euid = task->euid;
+                ev->event_data.id.r.ruid = cred->uid;
+                ev->event_data.id.e.euid = cred->euid;
         } else if (which_id == PROC_EVENT_GID) {
-                ev->event_data.id.r.rgid = task->gid;
-                ev->event_data.id.e.egid = task->egid;
-        } else
+                ev->event_data.id.r.rgid = cred->gid;
+                ev->event_data.id.e.egid = cred->egid;
+        } else {
+                rcu_read_unlock();
                 return;
+        }
+        rcu_read_unlock();
         get_seq(&msg->seq, &ev->cpu);
         ktime_get_ts(&ts); /* get high res monotonic timestamp */
         put_unaligned(timespec_to_ns(&ts), (__u64 *)&ev->timestamp_ns);
diff --git a/drivers/isdn/capi/capifs.c b/drivers/isdn/capi/capifs.c
index 550e80f390a6..0aa66ec4cbdd 100644
--- a/drivers/isdn/capi/capifs.c
+++ b/drivers/isdn/capi/capifs.c
@@ -156,8 +156,8 @@ void capifs_new_ncci(unsigned int number, dev_t device)
         if (!inode)
                 return;
         inode->i_ino = number+2;
-        inode->i_uid = config.setuid ? config.uid : current->fsuid;
-        inode->i_gid = config.setgid ? config.gid : current->fsgid;
+        inode->i_uid = config.setuid ? config.uid : current_fsuid();
+        inode->i_gid = config.setgid ? config.gid : current_fsgid();
         inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
         init_special_inode(inode, S_IFCHR|config.mode, device);
         //inode->i_op = &capifs_file_inode_operations;
diff --git a/drivers/isdn/hysdn/hysdn_procconf.c b/drivers/isdn/hysdn/hysdn_procconf.c
index 484299b031f8..8f9f4912de32 100644
--- a/drivers/isdn/hysdn/hysdn_procconf.c
+++ b/drivers/isdn/hysdn/hysdn_procconf.c
@@ -246,7 +246,8 @@ hysdn_conf_open(struct inode *ino, struct file *filep)
         }
         if (card->debug_flags & (LOG_PROC_OPEN | LOG_PROC_ALL))
                 hysdn_addlog(card, "config open for uid=%d gid=%d mode=0x%x",
-                             filep->f_uid, filep->f_gid, filep->f_mode);
+                             filep->f_cred->fsuid, filep->f_cred->fsgid,
+                             filep->f_mode);
 
         if ((filep->f_mode & (FMODE_READ | FMODE_WRITE)) == FMODE_WRITE) {
                 /* write only access -> write boot file or conf line */
@@ -331,7 +332,8 @@ hysdn_conf_close(struct inode *ino, struct file *filep)
         }
         if (card->debug_flags & (LOG_PROC_OPEN | LOG_PROC_ALL))
                 hysdn_addlog(card, "config close for uid=%d gid=%d mode=0x%x",
-                             filep->f_uid, filep->f_gid, filep->f_mode);
+                             filep->f_cred->fsuid, filep->f_cred->fsgid,
+                             filep->f_mode);
 
         if ((filep->f_mode & (FMODE_READ | FMODE_WRITE)) == FMODE_WRITE) {
                 /* write only access -> write boot file or conf line */
diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 33b6d1b122fb..55dc70c6b4db 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -702,6 +702,7 @@ static int tun_set_iff(struct net *net, struct file *file, struct ifreq *ifr)
         struct tun_net *tn;
         struct tun_struct *tun;
         struct net_device *dev;
+        const struct cred *cred = current_cred();
         int err;
 
         tn = net_generic(net, tun_net_id);
@@ -712,11 +713,12 @@ static int tun_set_iff(struct net *net, struct file *file, struct ifreq *ifr)
 
                 /* Check permissions */
                 if (((tun->owner != -1 &&
-                      current->euid != tun->owner) ||
+                      cred->euid != tun->owner) ||
                      (tun->group != -1 &&
-                      current->egid != tun->group)) &&
-                     !capable(CAP_NET_ADMIN))
+                      cred->egid != tun->group)) &&
+                    !capable(CAP_NET_ADMIN)) {
                         return -EPERM;
+                }
         }
         else if (__dev_get_by_name(net, ifr->ifr_name))
                 return -EINVAL;
diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c
index 2bccefebff1b..aa79280df15d 100644
--- a/drivers/usb/core/devio.c
+++ b/drivers/usb/core/devio.c
@@ -574,6 +574,7 @@ static int usbdev_open(struct inode *inode, struct file *file)
 {
         struct usb_device *dev = NULL;
         struct dev_state *ps;
+        const struct cred *cred = current_cred();
         int ret;
 
         lock_kernel();
@@ -617,8 +618,8 @@ static int usbdev_open(struct inode *inode, struct file *file)
         init_waitqueue_head(&ps->wait);
         ps->discsignr = 0;
         ps->disc_pid = get_pid(task_pid(current));
-        ps->disc_uid = current->uid;
-        ps->disc_euid = current->euid;
+        ps->disc_uid = cred->uid;
+        ps->disc_euid = cred->euid;
         ps->disccontext = NULL;
         ps->ifclaimed = 0;
         security_task_getsecid(current, &ps->secid);
@@ -967,6 +968,7 @@ static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
         struct usb_host_endpoint *ep;
         struct async *as;
         struct usb_ctrlrequest *dr = NULL;
+        const struct cred *cred = current_cred();
         unsigned int u, totlen, isofrmlen;
         int ret, ifnum = -1;
         int is_in;
@@ -1174,8 +1176,8 @@ static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
         as->signr = uurb->signr;
         as->ifnum = ifnum;
         as->pid = get_pid(task_pid(current));
-        as->uid = current->uid;
-        as->euid = current->euid;
+        as->uid = cred->uid;
+        as->euid = cred->euid;
         security_task_getsecid(current, &as->secid);
         if (!is_in) {
                 if (copy_from_user(as->urb->transfer_buffer, uurb->buffer,
diff --git a/drivers/usb/core/inode.c b/drivers/usb/core/inode.c
index 94632264dccf..185be760833e 100644
--- a/drivers/usb/core/inode.c
+++ b/drivers/usb/core/inode.c
@@ -277,8 +277,8 @@ static struct inode *usbfs_get_inode (struct super_block *sb, int mode, dev_t de
 
         if (inode) {
                 inode->i_mode = mode;
-                inode->i_uid = current->fsuid;
-                inode->i_gid = current->fsgid;
+                inode->i_uid = current_fsuid();
+                inode->i_gid = current_fsgid();
                 inode->i_blocks = 0;
                 inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
                 switch (mode & S_IFMT) {
diff --git a/fs/9p/fid.c b/fs/9p/fid.c
index 2a983d49d19c..14d944204571 100644
--- a/fs/9p/fid.c
+++ b/fs/9p/fid.c
@@ -120,7 +120,7 @@ struct p9_fid *v9fs_fid_lookup(struct dentry *dentry)
         switch (access) {
         case V9FS_ACCESS_SINGLE:
         case V9FS_ACCESS_USER:
-                uid = current->fsuid;
+                uid = current_fsuid();
                 any = 0;
                 break;
 
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index 2dfcf5487efe..81f8bbf12f9f 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -215,8 +215,8 @@ struct inode *v9fs_get_inode(struct super_block *sb, int mode)
         inode = new_inode(sb);
         if (inode) {
                 inode->i_mode = mode;
-                inode->i_uid = current->fsuid;
-                inode->i_gid = current->fsgid;
+                inode->i_uid = current_fsuid();
+                inode->i_gid = current_fsgid();
                 inode->i_blocks = 0;
                 inode->i_rdev = 0;
                 inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
diff --git a/fs/9p/vfs_super.c b/fs/9p/vfs_super.c
index d6cb1a0ca724..93212e40221a 100644
--- a/fs/9p/vfs_super.c
+++ b/fs/9p/vfs_super.c
@@ -113,8 +113,8 @@ static int v9fs_get_sb(struct file_system_type *fs_type, int flags,
         struct v9fs_session_info *v9ses = NULL;
         struct p9_wstat *st = NULL;
         int mode = S_IRWXUGO | S_ISVTX;
-        uid_t uid = current->fsuid;
-        gid_t gid = current->fsgid;
+        uid_t uid = current_fsuid();
+        gid_t gid = current_fsgid();
         struct p9_fid *fid;
         int retval = 0;
 
diff --git a/fs/affs/inode.c b/fs/affs/inode.c
index a13b334a3910..415d9c67ac16 100644
--- a/fs/affs/inode.c
+++ b/fs/affs/inode.c
@@ -293,8 +293,8 @@ affs_new_inode(struct inode *dir)
         mark_buffer_dirty_inode(bh, inode);
         affs_brelse(bh);
 
-        inode->i_uid     = current->fsuid;
-        inode->i_gid     = current->fsgid;
+        inode->i_uid     = current_fsuid();
+        inode->i_gid     = current_fsgid();
         inode->i_ino     = block;
         inode->i_nlink   = 1;
         inode->i_mtime   = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
diff --git a/fs/affs/super.c b/fs/affs/super.c
index 8989c93193ed..a19d64b582aa 100644
--- a/fs/affs/super.c
+++ b/fs/affs/super.c
@@ -163,8 +163,8 @@ parse_options(char *options, uid_t *uid, gid_t *gid, int *mode, int *reserved, s
 
         /* Fill in defaults */
 
-        *uid        = current->uid;
-        *gid        = current->gid;
+        *uid        = current_uid();
+        *gid        = current_gid();
         *reserved   = 2;
         *root       = -1;
         *blocksize  = -1;
diff --git a/fs/anon_inodes.c b/fs/anon_inodes.c
index 3662dd44896b..c16d9be1b017 100644
--- a/fs/anon_inodes.c
+++ b/fs/anon_inodes.c
@@ -154,8 +154,8 @@ static struct inode *anon_inode_mkinode(void)
          */
         inode->i_state = I_DIRTY;
         inode->i_mode = S_IRUSR | S_IWUSR;
-        inode->i_uid = current->fsuid;
-        inode->i_gid = current->fsgid;
+        inode->i_uid = current_fsuid();
+        inode->i_gid = current_fsgid();
         inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
         return inode;
 }
diff --git a/fs/attr.c b/fs/attr.c
index 7a83819f6ba2..f4360192a938 100644
--- a/fs/attr.c
+++ b/fs/attr.c
@@ -29,13 +29,13 @@ int inode_change_ok(struct inode *inode, struct iattr *attr)
 
         /* Make sure a caller can chown. */
         if ((ia_valid & ATTR_UID) &&
-            (current->fsuid != inode->i_uid ||
+            (current_fsuid() != inode->i_uid ||
              attr->ia_uid != inode->i_uid) && !capable(CAP_CHOWN))
                 goto error;
 
         /* Make sure caller can chgrp. */
         if ((ia_valid & ATTR_GID) &&
-            (current->fsuid != inode->i_uid ||
+            (current_fsuid() != inode->i_uid ||
             (!in_group_p(attr->ia_gid) && attr->ia_gid != inode->i_gid)) &&
             !capable(CAP_CHOWN))
                 goto error;
diff --git a/fs/autofs/inode.c b/fs/autofs/inode.c
index b70eea1e8c59..c773680d5c60 100644
--- a/fs/autofs/inode.c
+++ b/fs/autofs/inode.c
@@ -76,8 +76,8 @@ static int parse_options(char *options, int *pipefd, uid_t *uid, gid_t *gid,
         substring_t args[MAX_OPT_ARGS];
         int option;
 
-        *uid = current->uid;
-        *gid = current->gid;
+        *uid = current_uid();
+        *gid = current_gid();
         *pgrp = task_pgrp_nr(current);
 
         *minproto = *maxproto = AUTOFS_PROTO_VERSION;
diff --git a/fs/autofs4/dev-ioctl.c b/fs/autofs4/dev-ioctl.c
index 33bf8cbfd051..63b7c7afe8df 100644
--- a/fs/autofs4/dev-ioctl.c
+++ b/fs/autofs4/dev-ioctl.c
@@ -308,7 +308,8 @@ static int autofs_dev_ioctl_open_mountpoint(const char *path, dev_t devid)
                         goto out;
                 }
 
-                filp = dentry_open(nd.path.dentry, nd.path.mnt, O_RDONLY);
+                filp = dentry_open(nd.path.dentry, nd.path.mnt, O_RDONLY,
+                                   current_cred());
                 if (IS_ERR(filp)) {
                         err = PTR_ERR(filp);
                         goto out;
diff --git a/fs/autofs4/inode.c b/fs/autofs4/inode.c
index c7e65bb30ba0..7b19802cfef4 100644
--- a/fs/autofs4/inode.c
+++ b/fs/autofs4/inode.c
@@ -235,8 +235,8 @@ static int parse_options(char *options, int *pipefd, uid_t *uid, gid_t *gid,
         substring_t args[MAX_OPT_ARGS];
         int option;
 
-        *uid = current->uid;
-        *gid = current->gid;
+        *uid = current_uid();
+        *gid = current_gid();
         *pgrp = task_pgrp_nr(current);
 
         *minproto = AUTOFS_MIN_PROTO_VERSION;
diff --git a/fs/autofs4/waitq.c b/fs/autofs4/waitq.c
index 4b67c2a2d77c..e02cc8ae5eb3 100644
--- a/fs/autofs4/waitq.c
+++ b/fs/autofs4/waitq.c
@@ -391,8 +391,8 @@ int autofs4_wait(struct autofs_sb_info *sbi, struct dentry *dentry,
                 memcpy(&wq->name, &qstr, sizeof(struct qstr));
                 wq->dev = autofs4_get_dev(sbi);
                 wq->ino = autofs4_get_ino(sbi);
-                wq->uid = current->uid;
-                wq->gid = current->gid;
+                wq->uid = current_uid();
+                wq->gid = current_gid();
                 wq->pid = current->pid;
                 wq->tgid = current->tgid;
                 wq->status = -EINTR; /* Status return if interrupted */
diff --git a/fs/bfs/dir.c b/fs/bfs/dir.c
index daae463068e4..4dd1b623f937 100644
--- a/fs/bfs/dir.c
+++ b/fs/bfs/dir.c
@@ -106,8 +106,8 @@ static int bfs_create(struct inode *dir, struct dentry *dentry, int mode,
         }
         set_bit(ino, info->si_imap);
         info->si_freei--;
-        inode->i_uid = current->fsuid;
-        inode->i_gid = (dir->i_mode & S_ISGID) ? dir->i_gid : current->fsgid;
+        inode->i_uid = current_fsuid();
+        inode->i_gid = (dir->i_mode & S_ISGID) ? dir->i_gid : current_fsgid();
         inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
         inode->i_blocks = 0;
         inode->i_op = &bfs_file_inops;
diff --git a/fs/binfmt_aout.c b/fs/binfmt_aout.c
index 204cfd1d7676..f1f3f4192a60 100644
--- a/fs/binfmt_aout.c
+++ b/fs/binfmt_aout.c
@@ -320,7 +320,7 @@ static int load_aout_binary(struct linux_binprm * bprm, struct pt_regs * regs)
         current->mm->free_area_cache = current->mm->mmap_base;
         current->mm->cached_hole_size = 0;
 
-        compute_creds(bprm);
+        install_exec_creds(bprm);
         current->flags &= ~PF_FORKNOEXEC;
 #ifdef __sparc__
         if (N_MAGIC(ex) == NMAGIC) {
diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index 8fcfa398d350..f458c1217c5e 100644
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -157,7 +157,7 @@ create_elf_tables(struct linux_binprm *bprm, struct elfhdr *exec,
         int items;
         elf_addr_t *elf_info;
         int ei_index = 0;
-        struct task_struct *tsk = current;
+        const struct cred *cred = current_cred();
         struct vm_area_struct *vma;
 
         /*
@@ -223,10 +223,10 @@ create_elf_tables(struct linux_binprm *bprm, struct elfhdr *exec,
         NEW_AUX_ENT(AT_BASE, interp_load_addr);
         NEW_AUX_ENT(AT_FLAGS, 0);
         NEW_AUX_ENT(AT_ENTRY, exec->e_entry);
-        NEW_AUX_ENT(AT_UID, tsk->uid);
-        NEW_AUX_ENT(AT_EUID, tsk->euid);
-        NEW_AUX_ENT(AT_GID, tsk->gid);
-        NEW_AUX_ENT(AT_EGID, tsk->egid);
+        NEW_AUX_ENT(AT_UID, cred->uid);
+        NEW_AUX_ENT(AT_EUID, cred->euid);
+        NEW_AUX_ENT(AT_GID, cred->gid);
+        NEW_AUX_ENT(AT_EGID, cred->egid);
         NEW_AUX_ENT(AT_SECURE, security_bprm_secureexec(bprm));
         NEW_AUX_ENT(AT_EXECFN, bprm->exec);
         if (k_platform) {
@@ -956,7 +956,7 @@ static int load_elf_binary(struct linux_binprm *bprm, struct pt_regs *regs)
         }
 #endif /* ARCH_HAS_SETUP_ADDITIONAL_PAGES */
 
-        compute_creds(bprm);
+        install_exec_creds(bprm);
         current->flags &= ~PF_FORKNOEXEC;
         retval = create_elf_tables(bprm, &loc->elf_ex,
                           load_addr, interp_load_addr);
@@ -1361,6 +1361,7 @@ static void fill_prstatus(struct elf_prstatus *prstatus,
 static int fill_psinfo(struct elf_prpsinfo *psinfo, struct task_struct *p,
                        struct mm_struct *mm)
 {
+        const struct cred *cred;
         unsigned int i, len;
         
         /* first copy the parameters from user space */
@@ -1388,8 +1389,11 @@ static int fill_psinfo(struct elf_prpsinfo *psinfo, struct task_struct *p,
         psinfo->pr_zomb = psinfo->pr_sname == 'Z';
         psinfo->pr_nice = task_nice(p);
         psinfo->pr_flag = p->flags;
-        SET_UID(psinfo->pr_uid, p->uid);
-        SET_GID(psinfo->pr_gid, p->gid);
+        rcu_read_lock();
+        cred = __task_cred(p);
+        SET_UID(psinfo->pr_uid, cred->uid);
+        SET_GID(psinfo->pr_gid, cred->gid);
+        rcu_read_unlock();
         strncpy(psinfo->pr_fname, p->comm, sizeof(psinfo->pr_fname));
         
         return 0;
diff --git a/fs/binfmt_elf_fdpic.c b/fs/binfmt_elf_fdpic.c
index 5b5424cb3391..aa5b43205e37 100644
--- a/fs/binfmt_elf_fdpic.c
+++ b/fs/binfmt_elf_fdpic.c
@@ -404,7 +404,7 @@ static int load_elf_fdpic_binary(struct linux_binprm *bprm,
         current->mm->start_stack = current->mm->start_brk + stack_size;
 #endif
 
-        compute_creds(bprm);
+        install_exec_creds(bprm);
         current->flags &= ~PF_FORKNOEXEC;
         if (create_elf_fdpic_tables(bprm, current->mm,
                                     &exec_params, &interp_params) < 0)
@@ -475,6 +475,7 @@ static int create_elf_fdpic_tables(struct linux_binprm *bprm,
                                    struct elf_fdpic_params *exec_params,
                                    struct elf_fdpic_params *interp_params)
 {
+        const struct cred *cred = current_cred();
         unsigned long sp, csp, nitems;
         elf_caddr_t __user *argv, *envp;
         size_t platform_len = 0, len;
@@ -623,10 +624,10 @@ static int create_elf_fdpic_tables(struct linux_binprm *bprm,
         NEW_AUX_ENT(AT_BASE,    interp_params->elfhdr_addr);
         NEW_AUX_ENT(AT_FLAGS,   0);
         NEW_AUX_ENT(AT_ENTRY,   exec_params->entry_addr);
-        NEW_AUX_ENT(AT_UID,     (elf_addr_t) current->uid);
-        NEW_AUX_ENT(AT_EUID,    (elf_addr_t) current->euid);
-        NEW_AUX_ENT(AT_GID,     (elf_addr_t) current->gid);
-        NEW_AUX_ENT(AT_EGID,    (elf_addr_t) current->egid);
+        NEW_AUX_ENT(AT_UID,     (elf_addr_t) cred->uid);
+        NEW_AUX_ENT(AT_EUID,    (elf_addr_t) cred->euid);
+        NEW_AUX_ENT(AT_GID,     (elf_addr_t) cred->gid);
+        NEW_AUX_ENT(AT_EGID,    (elf_addr_t) cred->egid);
         NEW_AUX_ENT(AT_SECURE,  security_bprm_secureexec(bprm));
         NEW_AUX_ENT(AT_EXECFN,  bprm->exec);
 
@@ -1413,6 +1414,7 @@ static void fill_prstatus(struct elf_prstatus *prstatus,
 static int fill_psinfo(struct elf_prpsinfo *psinfo, struct task_struct *p,
                        struct mm_struct *mm)
 {
+        const struct cred *cred;
         unsigned int i, len;
 
         /* first copy the parameters from user space */
@@ -1440,8 +1442,11 @@ static int fill_psinfo(struct elf_prpsinfo *psinfo, struct task_struct *p,
         psinfo->pr_zomb = psinfo->pr_sname == 'Z';
         psinfo->pr_nice = task_nice(p);
         psinfo->pr_flag = p->flags;
-        SET_UID(psinfo->pr_uid, p->uid);
-        SET_GID(psinfo->pr_gid, p->gid);
+        rcu_read_lock();
+        cred = __task_cred(p);
+        SET_UID(psinfo->pr_uid, cred->uid);
+        SET_GID(psinfo->pr_gid, cred->gid);
+        rcu_read_unlock();
         strncpy(psinfo->pr_fname, p->comm, sizeof(psinfo->pr_fname));
 
         return 0;
diff --git a/fs/binfmt_flat.c b/fs/binfmt_flat.c
index ccb781a6a804..7bbd5c6b3725 100644
--- a/fs/binfmt_flat.c
+++ b/fs/binfmt_flat.c
@@ -880,7 +880,7 @@ static int load_flat_binary(struct linux_binprm * bprm, struct pt_regs * regs)
                                         (libinfo.lib_list[j].loaded)?
                                                 libinfo.lib_list[j].start_data:UNLOADED_LIB;
 
-        compute_creds(bprm);
+        install_exec_creds(bprm);
         current->flags &= ~PF_FORKNOEXEC;
 
         set_binfmt(&flat_format);
diff --git a/fs/binfmt_som.c b/fs/binfmt_som.c
index 74e587a52796..08644a61616e 100644
--- a/fs/binfmt_som.c
+++ b/fs/binfmt_som.c
@@ -255,7 +255,7 @@ load_som_binary(struct linux_binprm * bprm, struct pt_regs * regs)
         kfree(hpuxhdr);
 
         set_binfmt(&som_format);
-        compute_creds(bprm);
+        install_exec_creds(bprm);
         setup_arg_pages(bprm, STACK_TOP, EXSTACK_DEFAULT);
 
         create_som_tables(bprm);
diff --git a/fs/cifs/cifs_fs_sb.h b/fs/cifs/cifs_fs_sb.h
index 877c85409f1f..1e7b87497f26 100644
--- a/fs/cifs/cifs_fs_sb.h
+++ b/fs/cifs/cifs_fs_sb.h
@@ -19,7 +19,7 @@
 #define _CIFS_FS_SB_H
 
 #define CIFS_MOUNT_NO_PERM      1 /* do not do client vfs_perm check */
-#define CIFS_MOUNT_SET_UID      2 /* set current->euid in create etc. */
+#define CIFS_MOUNT_SET_UID      2 /* set current's euid in create etc. */
 #define CIFS_MOUNT_SERVER_INUM  4 /* inode numbers from uniqueid from server */
 #define CIFS_MOUNT_DIRECT_IO    8 /* do not write nor read through page cache */
 #define CIFS_MOUNT_NO_XATTR     0x10  /* if set - disable xattr support       */
diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h
index 6f21ecb85ce5..9d8b978137ad 100644
--- a/fs/cifs/cifsproto.h
+++ b/fs/cifs/cifsproto.h
@@ -39,7 +39,7 @@ extern int smb_send(struct socket *, struct smb_hdr *,
                         unsigned int /* length */ , struct sockaddr *, bool);
 extern unsigned int _GetXid(void);
 extern void _FreeXid(unsigned int);
-#define GetXid() (int)_GetXid(); cFYI(1,("CIFS VFS: in %s as Xid: %d with uid: %d",__func__, xid,current->fsuid));
+#define GetXid() (int)_GetXid(); cFYI(1,("CIFS VFS: in %s as Xid: %d with uid: %d",__func__, xid,current_fsuid()));
 #define FreeXid(curr_xid) {_FreeXid(curr_xid); cFYI(1,("CIFS VFS: leaving %s (xid = %d) rc = %d",__func__,curr_xid,(int)rc));}
 extern char *build_path_from_dentry(struct dentry *);
 extern char *build_wildcard_path_from_dentry(struct dentry *direntry);
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index c7d341714586..683dee4d2f76 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -836,8 +836,8 @@ cifs_parse_mount_options(char *options, const char *devname,
         /* null target name indicates to use *SMBSERVR default called name
            if we end up sending RFC1001 session initialize */
         vol->target_rfc1001_name[0] = 0;
-        vol->linux_uid = current->uid;  /* current->euid instead? */
-        vol->linux_gid = current->gid;
+        vol->linux_uid = current_uid();  /* use current_euid() instead? */
+        vol->linux_gid = current_gid();
         vol->dir_mode = S_IRWXUGO;
         /* 2767 perms indicate mandatory locking support */
         vol->file_mode = (S_IRWXUGO | S_ISGID) & (~S_IXGRP);
diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index e962e75e6f7b..2f02c52db666 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -235,11 +235,11 @@ cifs_create(struct inode *inode, struct dentry *direntry, int mode,
                         };
 
                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
-                                args.uid = (__u64) current->fsuid;
+                                args.uid = (__u64) current_fsuid();
                                 if (inode->i_mode & S_ISGID)
                                         args.gid = (__u64) inode->i_gid;
                                 else
-                                        args.gid = (__u64) current->fsgid;
+                                        args.gid = (__u64) current_fsgid();
                         } else {
                                 args.uid = NO_CHANGE_64;
                                 args.gid = NO_CHANGE_64;
@@ -271,13 +271,13 @@ cifs_create(struct inode *inode, struct dentry *direntry, int mode,
                                 if ((oplock & CIFS_CREATE_ACTION) &&
                                     (cifs_sb->mnt_cifs_flags &
                                      CIFS_MOUNT_SET_UID)) {
-                                        newinode->i_uid = current->fsuid;
+                                        newinode->i_uid = current_fsuid();
                                         if (inode->i_mode & S_ISGID)
                                                 newinode->i_gid =
                                                         inode->i_gid;
                                         else
                                                 newinode->i_gid =
-                                                        current->fsgid;
+                                                        current_fsgid();
                                 }
                         }
                 }
@@ -375,8 +375,8 @@ int cifs_mknod(struct inode *inode, struct dentry *direntry, int mode,
                         .device = device_number,
                 };
                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
-                        args.uid = (__u64) current->fsuid;
-                        args.gid = (__u64) current->fsgid;
+                        args.uid = (__u64) current_fsuid();
+                        args.gid = (__u64) current_fsgid();
                 } else {
                         args.uid = NO_CHANGE_64;
                         args.gid = NO_CHANGE_64;
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index ff8c68de4a92..8b7305e73d7e 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -1143,11 +1143,11 @@ mkdir_get_info:
                                 .device = 0,
                         };
                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
-                                args.uid = (__u64)current->fsuid;
+                                args.uid = (__u64)current_fsuid();
                                 if (inode->i_mode & S_ISGID)
                                         args.gid = (__u64)inode->i_gid;
                                 else
-                                        args.gid = (__u64)current->fsgid;
+                                        args.gid = (__u64)current_fsgid();
                         } else {
                                 args.uid = NO_CHANGE_64;
                                 args.gid = NO_CHANGE_64;
@@ -1184,13 +1184,13 @@ mkdir_get_info:
                                 if (cifs_sb->mnt_cifs_flags &
                                      CIFS_MOUNT_SET_UID) {
                                         direntry->d_inode->i_uid =
-                                                current->fsuid;
+                                                current_fsuid();
                                         if (inode->i_mode & S_ISGID)
                                                 direntry->d_inode->i_gid =
                                                         inode->i_gid;
                                         else
                                                 direntry->d_inode->i_gid =
-                                                        current->fsgid;
+                                                        current_fsgid();
                                 }
                         }
                 }
diff --git a/fs/cifs/ioctl.c b/fs/cifs/ioctl.c
index 0088a5b52564..f94650683a00 100644
--- a/fs/cifs/ioctl.c
+++ b/fs/cifs/ioctl.c
@@ -65,7 +65,7 @@ long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg)
         switch (command) {
                 case CIFS_IOC_CHECKUMOUNT:
                         cFYI(1, ("User unmount attempted"));
-                        if (cifs_sb->mnt_uid == current->uid)
+                        if (cifs_sb->mnt_uid == current_uid())
                                 rc = 0;
                         else {
                                 rc = -EACCES;
diff --git a/fs/cifs/misc.c b/fs/cifs/misc.c
index 9ee3f689c2b0..8a82d076450b 100644
--- a/fs/cifs/misc.c
+++ b/fs/cifs/misc.c
@@ -338,13 +338,13 @@ header_assemble(struct smb_hdr *buffer, char smb_command /* command */ ,
                 /*  BB Add support for establishing new tCon and SMB Session  */
                 /*      with userid/password pairs found on the smb session   */
                 /*      for other target tcp/ip addresses               BB    */
-                                if (current->fsuid != treeCon->ses->linux_uid) {
+                                if (current_fsuid() != treeCon->ses->linux_uid) {
                                         cFYI(1, ("Multiuser mode and UID "
                                                  "did not match tcon uid"));
                                         read_lock(&cifs_tcp_ses_lock);
                                         list_for_each(temp_item, &treeCon->ses->server->smb_ses_list) {
                                                 ses = list_entry(temp_item, struct cifsSesInfo, smb_ses_list);
-                                                if (ses->linux_uid == current->fsuid) {
+                                                if (ses->linux_uid == current_fsuid()) {
                                                         if (ses->server == treeCon->ses->server) {
                                                                 cFYI(1, ("found matching uid substitute right smb_uid"));
                                                                 buffer->Uid = ses->Suid;
diff --git a/fs/coda/cache.c b/fs/coda/cache.c
index 8a2370341c7a..a5bf5771a22a 100644
--- a/fs/coda/cache.c
+++ b/fs/coda/cache.c
@@ -32,8 +32,8 @@ void coda_cache_enter(struct inode *inode, int mask)
         struct coda_inode_info *cii = ITOC(inode);
 
         cii->c_cached_epoch = atomic_read(&permission_epoch);
-        if (cii->c_uid != current->fsuid) {
-                cii->c_uid = current->fsuid;
+        if (cii->c_uid != current_fsuid()) {
+                cii->c_uid = current_fsuid();
                 cii->c_cached_perm = mask;
         } else
                 cii->c_cached_perm |= mask;
@@ -60,7 +60,7 @@ int coda_cache_check(struct inode *inode, int mask)
         int hit;
         
         hit = (mask & cii->c_cached_perm) == mask &&
-                cii->c_uid == current->fsuid &&
+                cii->c_uid == current_fsuid() &&
                 cii->c_cached_epoch == atomic_read(&permission_epoch);
 
         return hit;
diff --git a/fs/coda/file.c b/fs/coda/file.c
index 29137ff3ca67..466303db2df6 100644
--- a/fs/coda/file.c
+++ b/fs/coda/file.c
@@ -13,6 +13,7 @@
 #include <linux/file.h>
 #include <linux/fs.h>
 #include <linux/stat.h>
+#include <linux/cred.h>
 #include <linux/errno.h>
 #include <linux/smp_lock.h>
 #include <linux/string.h>
@@ -174,7 +175,7 @@ int coda_release(struct inode *coda_inode, struct file *coda_file)
         BUG_ON(!cfi || cfi->cfi_magic != CODA_MAGIC);
 
         err = venus_close(coda_inode->i_sb, coda_i2f(coda_inode),
-                          coda_flags, coda_file->f_uid);
+                          coda_flags, coda_file->f_cred->fsuid);
 
         host_inode = cfi->cfi_container->f_path.dentry->d_inode;
         cii = ITOC(coda_inode);
diff --git a/fs/coda/upcall.c b/fs/coda/upcall.c
index ce432bca95d1..c274d949179d 100644
--- a/fs/coda/upcall.c
+++ b/fs/coda/upcall.c
@@ -52,7 +52,7 @@ static void *alloc_upcall(int opcode, int size)
         inp->ih.opcode = opcode;
         inp->ih.pid = current->pid;
         inp->ih.pgid = task_pgrp_nr(current);
-        inp->ih.uid = current->fsuid;
+        inp->ih.uid = current_fsuid();
 
         return (void*)inp;
 }
diff --git a/fs/compat.c b/fs/compat.c
index e5f49f538502..d1ece79b6411 100644
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -1393,10 +1393,20 @@ int compat_do_execve(char * filename,
         if (!bprm)
                 goto out_ret;
 
+        retval = mutex_lock_interruptible(&current->cred_exec_mutex);
+        if (retval < 0)
+                goto out_free;
+
+        retval = -ENOMEM;
+        bprm->cred = prepare_exec_creds();
+        if (!bprm->cred)
+                goto out_unlock;
+        check_unsafe_exec(bprm);
+
         file = open_exec(filename);
         retval = PTR_ERR(file);
         if (IS_ERR(file))
-                goto out_kfree;
+                goto out_unlock;
 
         sched_exec();
 
@@ -1410,14 +1420,10 @@ int compat_do_execve(char * filename,
 
         bprm->argc = compat_count(argv, MAX_ARG_STRINGS);
         if ((retval = bprm->argc) < 0)
-                goto out_mm;
+                goto out;
 
         bprm->envc = compat_count(envp, MAX_ARG_STRINGS);
         if ((retval = bprm->envc) < 0)
-                goto out_mm;
-
-        retval = security_bprm_alloc(bprm);
-        if (retval)
                 goto out;
 
         retval = prepare_binprm(bprm);
@@ -1438,19 +1444,16 @@ int compat_do_execve(char * filename,
                 goto out;
 
         retval = search_binary_handler(bprm, regs);
-        if (retval >= 0) {
-                /* execve success */
-                security_bprm_free(bprm);
-                acct_update_integrals(current);
-                free_bprm(bprm);
-                return retval;
-        }
+        if (retval < 0)
+                goto out;
 
-out:
-        if (bprm->security)
-                security_bprm_free(bprm);
+        /* execve succeeded */
+        mutex_unlock(&current->cred_exec_mutex);
+        acct_update_integrals(current);
+        free_bprm(bprm);
+        return retval;
 
-out_mm:
+out:
         if (bprm->mm)
                 mmput(bprm->mm);
 
@@ -1460,7 +1463,10 @@ out_file:
                 fput(bprm->file);
         }
 
-out_kfree:
+out_unlock:
+        mutex_unlock(&current->cred_exec_mutex);
+
+out_free:
         free_bprm(bprm);
 
 out_ret:
diff --git a/fs/devpts/inode.c b/fs/devpts/inode.c
index 4a714f6c1bed..5d61b7c06e13 100644
--- a/fs/devpts/inode.c
+++ b/fs/devpts/inode.c
@@ -222,8 +222,8 @@ int devpts_pty_new(struct inode *ptmx_inode, struct tty_struct *tty)
                 return -ENOMEM;
 
         inode->i_ino = number+2;
-        inode->i_uid = config.setuid ? config.uid : current->fsuid;
-        inode->i_gid = config.setgid ? config.gid : current->fsgid;
+        inode->i_uid = config.setuid ? config.uid : current_fsuid();
+        inode->i_gid = config.setgid ? config.gid : current_fsgid();
         inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
         init_special_inode(inode, S_IFCHR|config.mode, device);
         inode->i_private = tty;
diff --git a/fs/dquot.c b/fs/dquot.c
index 5e95261005b2..c237ccc8581c 100644
--- a/fs/dquot.c
+++ b/fs/dquot.c
@@ -874,7 +874,7 @@ static inline int need_print_warning(struct dquot *dquot)
 
         switch (dquot->dq_type) {
                 case USRQUOTA:
-                        return current->fsuid == dquot->dq_id;
+                        return current_fsuid() == dquot->dq_id;
                 case GRPQUOTA:
                         return in_group_p(dquot->dq_id);
         }
@@ -981,7 +981,7 @@ static void send_warning(const struct dquot *dquot, const char warntype)
                 MINOR(dquot->dq_sb->s_dev));
         if (ret)
                 goto attr_err_out;
-        ret = nla_put_u64(skb, QUOTA_NL_A_CAUSED_ID, current->user->uid);
+        ret = nla_put_u64(skb, QUOTA_NL_A_CAUSED_ID, current_uid());
         if (ret)
                 goto attr_err_out;
         genlmsg_end(skb, msg_head);
diff --git a/fs/ecryptfs/ecryptfs_kernel.h b/fs/ecryptfs/ecryptfs_kernel.h
index 3504cf9df358..a75026d35d16 100644
--- a/fs/ecryptfs/ecryptfs_kernel.h
+++ b/fs/ecryptfs/ecryptfs_kernel.h
@@ -691,7 +691,8 @@ int ecryptfs_init_kthread(void);
 void ecryptfs_destroy_kthread(void);
 int ecryptfs_privileged_open(struct file **lower_file,
                              struct dentry *lower_dentry,
-                             struct vfsmount *lower_mnt);
+                             struct vfsmount *lower_mnt,
+                             const struct cred *cred);
 int ecryptfs_init_persistent_file(struct dentry *ecryptfs_dentry);
 
 #endif /* #ifndef ECRYPTFS_KERNEL_H */
diff --git a/fs/ecryptfs/kthread.c b/fs/ecryptfs/kthread.c
index c440c6b58b2d..c6d7a4d748a0 100644
--- a/fs/ecryptfs/kthread.c
+++ b/fs/ecryptfs/kthread.c
@@ -73,7 +73,7 @@ static int ecryptfs_threadfn(void *ignored)
                                 mntget(req->lower_mnt);
                                 (*req->lower_file) = dentry_open(
                                         req->lower_dentry, req->lower_mnt,
-                                        (O_RDWR | O_LARGEFILE));
+                                        (O_RDWR | O_LARGEFILE), current_cred());
                                 req->flags |= ECRYPTFS_REQ_PROCESSED;
                         }
                         wake_up(&req->wait);
@@ -132,7 +132,8 @@ void ecryptfs_destroy_kthread(void)
  */
 int ecryptfs_privileged_open(struct file **lower_file,
                              struct dentry *lower_dentry,
-                             struct vfsmount *lower_mnt)
+                             struct vfsmount *lower_mnt,
+                             const struct cred *cred)
 {
         struct ecryptfs_open_req *req;
         int rc = 0;
@@ -143,7 +144,7 @@ int ecryptfs_privileged_open(struct file **lower_file,
         dget(lower_dentry);
         mntget(lower_mnt);
         (*lower_file) = dentry_open(lower_dentry, lower_mnt,
-                                    (O_RDWR | O_LARGEFILE));
+                                    (O_RDWR | O_LARGEFILE), cred);
         if (!IS_ERR(*lower_file))
                 goto out;
         req = kmem_cache_alloc(ecryptfs_open_req_cache, GFP_KERNEL);
@@ -184,7 +185,7 @@ int ecryptfs_privileged_open(struct file **lower_file,
                 dget(lower_dentry);
                 mntget(lower_mnt);
                 (*lower_file) = dentry_open(lower_dentry, lower_mnt,
-                                            (O_RDONLY | O_LARGEFILE));
+                                            (O_RDONLY | O_LARGEFILE), cred);
                 if (IS_ERR(*lower_file)) {
                         rc = PTR_ERR(*req->lower_file);
                         (*lower_file) = NULL;
diff --git a/fs/ecryptfs/main.c b/fs/ecryptfs/main.c
index 64d2ba980df4..fd630713c5c7 100644
--- a/fs/ecryptfs/main.c
+++ b/fs/ecryptfs/main.c
@@ -115,6 +115,7 @@ void __ecryptfs_printk(const char *fmt, ...)
  */
 int ecryptfs_init_persistent_file(struct dentry *ecryptfs_dentry)
 {
+        const struct cred *cred = current_cred();
         struct ecryptfs_inode_info *inode_info =
                 ecryptfs_inode_to_private(ecryptfs_dentry->d_inode);
         int rc = 0;
@@ -127,7 +128,7 @@ int ecryptfs_init_persistent_file(struct dentry *ecryptfs_dentry)
 
                 lower_dentry = ecryptfs_dentry_to_lower(ecryptfs_dentry);
                 rc = ecryptfs_privileged_open(&inode_info->lower_file,
-                                                     lower_dentry, lower_mnt);
+                                              lower_dentry, lower_mnt, cred);
                 if (rc || IS_ERR(inode_info->lower_file)) {
                         printk(KERN_ERR "Error opening lower persistent file "
                                "for lower_dentry [0x%p] and lower_mnt [0x%p]; "
diff --git a/fs/ecryptfs/messaging.c b/fs/ecryptfs/messaging.c
index c6983978a31e..6913f727624d 100644
--- a/fs/ecryptfs/messaging.c
+++ b/fs/ecryptfs/messaging.c
@@ -360,7 +360,8 @@ int ecryptfs_process_response(struct ecryptfs_message *msg, uid_t euid,
         struct ecryptfs_msg_ctx *msg_ctx;
         size_t msg_size;
         struct nsproxy *nsproxy;
-        struct user_namespace *current_user_ns;
+        struct user_namespace *tsk_user_ns;
+        uid_t ctx_euid;
         int rc;
 
         if (msg->index >= ecryptfs_message_buf_len) {
@@ -384,9 +385,9 @@ int ecryptfs_process_response(struct ecryptfs_message *msg, uid_t euid,
                 mutex_unlock(&ecryptfs_daemon_hash_mux);
                 goto wake_up;
         }
-        current_user_ns = nsproxy->user_ns;
-        rc = ecryptfs_find_daemon_by_euid(&daemon, msg_ctx->task->euid,
-                                          current_user_ns);
+        tsk_user_ns = __task_cred(msg_ctx->task)->user->user_ns;
+        ctx_euid = task_euid(msg_ctx->task);
+        rc = ecryptfs_find_daemon_by_euid(&daemon, ctx_euid, tsk_user_ns);
         rcu_read_unlock();
         mutex_unlock(&ecryptfs_daemon_hash_mux);
         if (rc) {
@@ -394,28 +395,28 @@ int ecryptfs_process_response(struct ecryptfs_message *msg, uid_t euid,
                 printk(KERN_WARNING "%s: User [%d] received a "
                        "message response from process [0x%p] but does "
                        "not have a registered daemon\n", __func__,
-                       msg_ctx->task->euid, pid);
+                       ctx_euid, pid);
                 goto wake_up;
         }
-        if (msg_ctx->task->euid != euid) {
+        if (ctx_euid != euid) {
                 rc = -EBADMSG;
                 printk(KERN_WARNING "%s: Received message from user "
                        "[%d]; expected message from user [%d]\n", __func__,
-                       euid, msg_ctx->task->euid);
+                       euid, ctx_euid);
                 goto unlock;
         }
-        if (current_user_ns != user_ns) {
+        if (tsk_user_ns != user_ns) {
                 rc = -EBADMSG;
                 printk(KERN_WARNING "%s: Received message from user_ns "
                        "[0x%p]; expected message from user_ns [0x%p]\n",
-                       __func__, user_ns, nsproxy->user_ns);
+                       __func__, user_ns, tsk_user_ns);
                 goto unlock;
         }
         if (daemon->pid != pid) {
                 rc = -EBADMSG;
                 printk(KERN_ERR "%s: User [%d] sent a message response "
                        "from an unrecognized process [0x%p]\n",
-                       __func__, msg_ctx->task->euid, pid);
+                       __func__, ctx_euid, pid);
                 goto unlock;
         }
         if (msg_ctx->state != ECRYPTFS_MSG_CTX_STATE_PENDING) {
@@ -464,14 +465,14 @@ ecryptfs_send_message_locked(char *data, int data_len, u8 msg_type,
                              struct ecryptfs_msg_ctx **msg_ctx)
 {
         struct ecryptfs_daemon *daemon;
+        uid_t euid = current_euid();
         int rc;
 
-        rc = ecryptfs_find_daemon_by_euid(&daemon, current->euid,
-                                          current->nsproxy->user_ns);
+        rc = ecryptfs_find_daemon_by_euid(&daemon, euid, current_user_ns());
         if (rc || !daemon) {
                 rc = -ENOTCONN;
                 printk(KERN_ERR "%s: User [%d] does not have a daemon "
-                       "registered\n", __func__, current->euid);
+                       "registered\n", __func__, euid);
                 goto out;
         }
         mutex_lock(&ecryptfs_msg_ctx_lists_mux);
diff --git a/fs/ecryptfs/miscdev.c b/fs/ecryptfs/miscdev.c
index b484792a0996..efd95a0ed1ea 100644
--- a/fs/ecryptfs/miscdev.c
+++ b/fs/ecryptfs/miscdev.c
@@ -42,12 +42,12 @@ ecryptfs_miscdev_poll(struct file *file, poll_table *pt)
 {
         struct ecryptfs_daemon *daemon;
         unsigned int mask = 0;
+        uid_t euid = current_euid();
         int rc;
 
         mutex_lock(&ecryptfs_daemon_hash_mux);
         /* TODO: Just use file->private_data? */
-        rc = ecryptfs_find_daemon_by_euid(&daemon, current->euid,
-                                          current->nsproxy->user_ns);
+        rc = ecryptfs_find_daemon_by_euid(&daemon, euid, current_user_ns());
         BUG_ON(rc || !daemon);
         mutex_lock(&daemon->mux);
         mutex_unlock(&ecryptfs_daemon_hash_mux);
@@ -83,6 +83,7 @@ static int
 ecryptfs_miscdev_open(struct inode *inode, struct file *file)
 {
         struct ecryptfs_daemon *daemon = NULL;
+        uid_t euid = current_euid();
         int rc;
 
         mutex_lock(&ecryptfs_daemon_hash_mux);
@@ -93,11 +94,9 @@ ecryptfs_miscdev_open(struct inode *inode, struct file *file)
                        "count; rc = [%d]\n", __func__, rc);
                 goto out_unlock_daemon_list;
         }
-        rc = ecryptfs_find_daemon_by_euid(&daemon, current->euid,
-                                          current->nsproxy->user_ns);
+        rc = ecryptfs_find_daemon_by_euid(&daemon, euid, current_user_ns());
         if (rc || !daemon) {
-                rc = ecryptfs_spawn_daemon(&daemon, current->euid,
-                                           current->nsproxy->user_ns,
+                rc = ecryptfs_spawn_daemon(&daemon, euid, current_user_ns(),
                                            task_pid(current));
                 if (rc) {
                         printk(KERN_ERR "%s: Error attempting to spawn daemon; "
@@ -147,11 +146,11 @@ static int
 ecryptfs_miscdev_release(struct inode *inode, struct file *file)
 {
         struct ecryptfs_daemon *daemon = NULL;
+        uid_t euid = current_euid();
         int rc;
 
         mutex_lock(&ecryptfs_daemon_hash_mux);
-        rc = ecryptfs_find_daemon_by_euid(&daemon, current->euid,
-                                          current->nsproxy->user_ns);
+        rc = ecryptfs_find_daemon_by_euid(&daemon, euid, current_user_ns());
         BUG_ON(rc || !daemon);
         mutex_lock(&daemon->mux);
         BUG_ON(daemon->pid != task_pid(current));
@@ -246,12 +245,12 @@ ecryptfs_miscdev_read(struct file *file, char __user *buf, size_t count,
         char packet_length[3];
         size_t i;
         size_t total_length;
+        uid_t euid = current_euid();
         int rc;
 
         mutex_lock(&ecryptfs_daemon_hash_mux);
         /* TODO: Just use file->private_data? */
-        rc = ecryptfs_find_daemon_by_euid(&daemon, current->euid,
-                                          current->nsproxy->user_ns);
+        rc = ecryptfs_find_daemon_by_euid(&daemon, euid, current_user_ns());
         BUG_ON(rc || !daemon);
         mutex_lock(&daemon->mux);
         if (daemon->flags & ECRYPTFS_DAEMON_ZOMBIE) {
@@ -290,8 +289,8 @@ check_list:
                  * message from the queue; try again */
                 goto check_list;
         }
-        BUG_ON(current->euid != daemon->euid);
-        BUG_ON(current->nsproxy->user_ns != daemon->user_ns);
+        BUG_ON(euid != daemon->euid);
+        BUG_ON(current_user_ns() != daemon->user_ns);
         BUG_ON(task_pid(current) != daemon->pid);
         msg_ctx = list_first_entry(&daemon->msg_ctx_out_queue,
                                    struct ecryptfs_msg_ctx, daemon_out_list);
@@ -414,6 +413,7 @@ ecryptfs_miscdev_write(struct file *file, const char __user *buf,
         size_t packet_size, packet_size_length, i;
         ssize_t sz = 0;
         char *data;
+        uid_t euid = current_euid();
         int rc;
 
         if (count == 0)
@@ -463,8 +463,7 @@ ecryptfs_miscdev_write(struct file *file, const char __user *buf,
                         goto out_free;
                 }
                 rc = ecryptfs_miscdev_response(&data[i], packet_size,
-                                               current->euid,
-                                               current->nsproxy->user_ns,
+                                               euid, current_user_ns(),
                                                task_pid(current), seq);
                 if (rc)
                         printk(KERN_WARNING "%s: Failed to deliver miscdev "
diff --git a/fs/exec.c b/fs/exec.c
index ec5df9a38313..1f59ea079cbb 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -55,6 +55,7 @@
 #include <asm/uaccess.h>
 #include <asm/mmu_context.h>
 #include <asm/tlb.h>
+#include "internal.h"
 
 #ifdef __alpha__
 /* for /sbin/loader handling in search_binary_handler() */
@@ -980,7 +981,7 @@ int flush_old_exec(struct linux_binprm * bprm)
         /* This is the point of no return */
         current->sas_ss_sp = current->sas_ss_size = 0;
 
-        if (current->euid == current->uid && current->egid == current->gid)
+        if (current_euid() == current_uid() && current_egid() == current_gid())
                 set_dumpable(current->mm, 1);
         else
                 set_dumpable(current->mm, suid_dumpable);
@@ -1007,16 +1008,17 @@ int flush_old_exec(struct linux_binprm * bprm)
          */
         current->mm->task_size = TASK_SIZE;
 
-        if (bprm->e_uid != current->euid || bprm->e_gid != current->egid) {
-                suid_keys(current);
-                set_dumpable(current->mm, suid_dumpable);
+        /* install the new credentials */
+        if (bprm->cred->uid != current_euid() ||
+            bprm->cred->gid != current_egid()) {
                 current->pdeath_signal = 0;
         } else if (file_permission(bprm->file, MAY_READ) ||
-                        (bprm->interp_flags & BINPRM_FLAGS_ENFORCE_NONDUMP)) {
-                suid_keys(current);
+                   bprm->interp_flags & BINPRM_FLAGS_ENFORCE_NONDUMP) {
                 set_dumpable(current->mm, suid_dumpable);
         }
 
+        current->personality &= ~bprm->per_clear;
+
         /* An exec changes our domain. We are no longer part of the thread
            group */
 
@@ -1033,13 +1035,50 @@ out:
 
 EXPORT_SYMBOL(flush_old_exec);
 
+/*
+ * install the new credentials for this executable
+ */
+void install_exec_creds(struct linux_binprm *bprm)
+{
+        security_bprm_committing_creds(bprm);
+
+        commit_creds(bprm->cred);
+        bprm->cred = NULL;
+
+        /* cred_exec_mutex must be held at least to this point to prevent
+         * ptrace_attach() from altering our determination of the task's
+         * credentials; any time after this it may be unlocked */
+
+        security_bprm_committed_creds(bprm);
+}
+EXPORT_SYMBOL(install_exec_creds);
+
+/*
+ * determine how safe it is to execute the proposed program
+ * - the caller must hold current->cred_exec_mutex to protect against
+ *   PTRACE_ATTACH
+ */
+void check_unsafe_exec(struct linux_binprm *bprm)
+{
+        struct task_struct *p = current;
+
+        bprm->unsafe = tracehook_unsafe_exec(p);
+
+        if (atomic_read(&p->fs->count) > 1 ||
+            atomic_read(&p->files->count) > 1 ||
+            atomic_read(&p->sighand->count) > 1)
+                bprm->unsafe |= LSM_UNSAFE_SHARE;
+}
+
 /* 
  * Fill the binprm structure from the inode. 
  * Check permissions, then read the first 128 (BINPRM_BUF_SIZE) bytes
+ *
+ * This may be called multiple times for binary chains (scripts for example).
  */
 int prepare_binprm(struct linux_binprm *bprm)
 {
-        int mode;
+        umode_t mode;
         struct inode * inode = bprm->file->f_path.dentry->d_inode;
         int retval;
 
@@ -1047,14 +1086,15 @@ int prepare_binprm(struct linux_binprm *bprm)
         if (bprm->file->f_op == NULL)
                 return -EACCES;
 
-        bprm->e_uid = current->euid;
-        bprm->e_gid = current->egid;
+        /* clear any previous set[ug]id data from a previous binary */
+        bprm->cred->euid = current_euid();
+        bprm->cred->egid = current_egid();
 
-        if(!(bprm->file->f_path.mnt->mnt_flags & MNT_NOSUID)) {
+        if (!(bprm->file->f_path.mnt->mnt_flags & MNT_NOSUID)) {
                 /* Set-uid? */
                 if (mode & S_ISUID) {
-                        current->personality &= ~PER_CLEAR_ON_SETID;
-                        bprm->e_uid = inode->i_uid;
+                        bprm->per_clear |= PER_CLEAR_ON_SETID;
+                        bprm->cred->euid = inode->i_uid;
                 }
 
                 /* Set-gid? */
@@ -1064,52 +1104,23 @@ int prepare_binprm(struct linux_binprm *bprm)
                  * executable.
                  */
                 if ((mode & (S_ISGID | S_IXGRP)) == (S_ISGID | S_IXGRP)) {
-                        current->personality &= ~PER_CLEAR_ON_SETID;
-                        bprm->e_gid = inode->i_gid;
+                        bprm->per_clear |= PER_CLEAR_ON_SETID;
+                        bprm->cred->egid = inode->i_gid;
                 }
         }
 
         /* fill in binprm security blob */
-        retval = security_bprm_set(bprm);
+        retval = security_bprm_set_creds(bprm);
         if (retval)
                 return retval;
+        bprm->cred_prepared = 1;
 
-        memset(bprm->buf,0,BINPRM_BUF_SIZE);
-        return kernel_read(bprm->file,0,bprm->buf,BINPRM_BUF_SIZE);
+        memset(bprm->buf, 0, BINPRM_BUF_SIZE);
+        return kernel_read(bprm->file, 0, bprm->buf, BINPRM_BUF_SIZE);
 }
 
 EXPORT_SYMBOL(prepare_binprm);
 
-static int unsafe_exec(struct task_struct *p)
-{
-        int unsafe = tracehook_unsafe_exec(p);
-
-        if (atomic_read(&p->fs->count) > 1 ||
-            atomic_read(&p->files->count) > 1 ||
-            atomic_read(&p->sighand->count) > 1)
-                unsafe |= LSM_UNSAFE_SHARE;
-
-        return unsafe;
-}
-
-void compute_creds(struct linux_binprm *bprm)
-{
-        int unsafe;
-
-        if (bprm->e_uid != current->uid) {
-                suid_keys(current);
-                current->pdeath_signal = 0;
-        }
-        exec_keys(current);
-
-        task_lock(current);
-        unsafe = unsafe_exec(current);
-        security_bprm_apply_creds(bprm, unsafe);
-        task_unlock(current);
-        security_bprm_post_apply_creds(bprm);
-}
-EXPORT_SYMBOL(compute_creds);
-
 /*
  * Arguments are '\0' separated strings found at the location bprm->p
  * points to; chop off the first by relocating brpm->p to right after
@@ -1270,6 +1281,8 @@ EXPORT_SYMBOL(search_binary_handler);
 void free_bprm(struct linux_binprm *bprm)
 {
         free_arg_pages(bprm);
+        if (bprm->cred)
+                abort_creds(bprm->cred);
         kfree(bprm);
 }
 
@@ -1295,10 +1308,20 @@ int do_execve(char * filename,
         if (!bprm)
                 goto out_files;
 
+        retval = mutex_lock_interruptible(&current->cred_exec_mutex);
+        if (retval < 0)
+                goto out_free;
+
+        retval = -ENOMEM;
+        bprm->cred = prepare_exec_creds();
+        if (!bprm->cred)
+                goto out_unlock;
+        check_unsafe_exec(bprm);
+
         file = open_exec(filename);
         retval = PTR_ERR(file);
         if (IS_ERR(file))
-                goto out_kfree;
+                goto out_unlock;
 
         sched_exec();
 
@@ -1312,14 +1335,10 @@ int do_execve(char * filename,
 
         bprm->argc = count(argv, MAX_ARG_STRINGS);
         if ((retval = bprm->argc) < 0)
-                goto out_mm;
+                goto out;
 
         bprm->envc = count(envp, MAX_ARG_STRINGS);
         if ((retval = bprm->envc) < 0)
-                goto out_mm;
-
-        retval = security_bprm_alloc(bprm);
-        if (retval)
                 goto out;
 
         retval = prepare_binprm(bprm);
@@ -1341,21 +1360,18 @@ int do_execve(char * filename,
 
         current->flags &= ~PF_KTHREAD;
         retval = search_binary_handler(bprm,regs);
-        if (retval >= 0) {
-                /* execve success */
-                security_bprm_free(bprm);
-                acct_update_integrals(current);
-                free_bprm(bprm);
-                if (displaced)
-                        put_files_struct(displaced);
-                return retval;
-        }
+        if (retval < 0)
+                goto out;
 
-out:
-        if (bprm->security)
-                security_bprm_free(bprm);
+        /* execve succeeded */
+        mutex_unlock(&current->cred_exec_mutex);
+        acct_update_integrals(current);
+        free_bprm(bprm);
+        if (displaced)
+                put_files_struct(displaced);
+        return retval;
 
-out_mm:
+out:
         if (bprm->mm)
                 mmput (bprm->mm);
 
@@ -1364,7 +1380,11 @@ out_file:
                 allow_write_access(bprm->file);
                 fput(bprm->file);
         }
-out_kfree:
+
+out_unlock:
+        mutex_unlock(&current->cred_exec_mutex);
+
+out_free:
         free_bprm(bprm);
 
 out_files:
@@ -1396,6 +1416,7 @@ EXPORT_SYMBOL(set_binfmt);
  */
 static int format_corename(char *corename, long signr)
 {
+        const struct cred *cred = current_cred();
         const char *pat_ptr = core_pattern;
         int ispipe = (*pat_ptr == '|');
         char *out_ptr = corename;
@@ -1432,7 +1453,7 @@ static int format_corename(char *corename, long signr)
                         /* uid */
                         case 'u':
                                 rc = snprintf(out_ptr, out_end - out_ptr,
-                                              "%d", current->uid);
+                                              "%d", cred->uid);
                                 if (rc > out_end - out_ptr)
                                         goto out;
                                 out_ptr += rc;
@@ -1440,7 +1461,7 @@ static int format_corename(char *corename, long signr)
                         /* gid */
                         case 'g':
                                 rc = snprintf(out_ptr, out_end - out_ptr,
-                                              "%d", current->gid);
+                                              "%d", cred->gid);
                                 if (rc > out_end - out_ptr)
                                         goto out;
                                 out_ptr += rc;
@@ -1716,8 +1737,9 @@ int do_coredump(long signr, int exit_code, struct pt_regs * regs)
         struct linux_binfmt * binfmt;
         struct inode * inode;
         struct file * file;
+        const struct cred *old_cred;
+        struct cred *cred;
         int retval = 0;
-        int fsuid = current->fsuid;
         int flag = 0;
         int ispipe = 0;
         unsigned long core_limit = current->signal->rlim[RLIMIT_CORE].rlim_cur;
@@ -1730,12 +1752,20 @@ int do_coredump(long signr, int exit_code, struct pt_regs * regs)
         binfmt = current->binfmt;
         if (!binfmt || !binfmt->core_dump)
                 goto fail;
+
+        cred = prepare_creds();
+        if (!cred) {
+                retval = -ENOMEM;
+                goto fail;
+        }
+
         down_write(&mm->mmap_sem);
         /*
          * If another thread got here first, or we are not dumpable, bail out.
          */
         if (mm->core_state || !get_dumpable(mm)) {
                 up_write(&mm->mmap_sem);
+                put_cred(cred);
                 goto fail;
         }
 
@@ -1746,12 +1776,16 @@ int do_coredump(long signr, int exit_code, struct pt_regs * regs)
          */
         if (get_dumpable(mm) == 2) {    /* Setuid core dump mode */
                 flag = O_EXCL;          /* Stop rewrite attacks */
-                current->fsuid = 0;     /* Dump root private */
+                cred->fsuid = 0;        /* Dump root private */
         }
 
         retval = coredump_wait(exit_code, &core_state);
-        if (retval < 0)
+        if (retval < 0) {
+                put_cred(cred);
                 goto fail;
+        }
+
+        old_cred = override_creds(cred);
 
         /*
          * Clear any false indication of pending signals that might
@@ -1823,7 +1857,7 @@ int do_coredump(long signr, int exit_code, struct pt_regs * regs)
          * Dont allow local users get cute and trick others to coredump
          * into their pre-created files:
          */
-        if (inode->i_uid != current->fsuid)
+        if (inode->i_uid != current_fsuid())
                 goto close_fail;
         if (!file->f_op)
                 goto close_fail;
@@ -1842,7 +1876,8 @@ fail_unlock:
         if (helper_argv)
                 argv_free(helper_argv);
 
-        current->fsuid = fsuid;
+        revert_creds(old_cred);
+        put_cred(cred);
         coredump_finish(mm);
 fail:
         return retval;
diff --git a/fs/exportfs/expfs.c b/fs/exportfs/expfs.c
index 890e01828817..197c7db583c7 100644
--- a/fs/exportfs/expfs.c
+++ b/fs/exportfs/expfs.c
@@ -14,6 +14,7 @@
 #include <linux/module.h>
 #include <linux/mount.h>
 #include <linux/namei.h>
+#include <linux/sched.h>
 
 #define dprintk(fmt, args...) do{}while(0)
 
@@ -249,6 +250,7 @@ static int filldir_one(void * __buf, const char * name, int len,
 static int get_name(struct vfsmount *mnt, struct dentry *dentry,
                 char *name, struct dentry *child)
 {
+        const struct cred *cred = current_cred();
         struct inode *dir = dentry->d_inode;
         int error;
         struct file *file;
@@ -263,7 +265,7 @@ static int get_name(struct vfsmount *mnt, struct dentry *dentry,
         /*
          * Open the directory ...
          */
-        file = dentry_open(dget(dentry), mntget(mnt), O_RDONLY);
+        file = dentry_open(dget(dentry), mntget(mnt), O_RDONLY, cred);
         error = PTR_ERR(file);
         if (IS_ERR(file))
                 goto out;
diff --git a/fs/ext2/balloc.c b/fs/ext2/balloc.c
index 6dac7ba2d22d..4a29d6376081 100644
--- a/fs/ext2/balloc.c
+++ b/fs/ext2/balloc.c
@@ -1193,7 +1193,7 @@ static int ext2_has_free_blocks(struct ext2_sb_info *sbi)
         free_blocks = percpu_counter_read_positive(&sbi->s_freeblocks_counter);
         root_blocks = le32_to_cpu(sbi->s_es->s_r_blocks_count);
         if (free_blocks < root_blocks + 1 && !capable(CAP_SYS_RESOURCE) &&
-                sbi->s_resuid != current->fsuid &&
+                sbi->s_resuid != current_fsuid() &&
                 (sbi->s_resgid == 0 || !in_group_p (sbi->s_resgid))) {
                 return 0;
         }
diff --git a/fs/ext2/ialloc.c b/fs/ext2/ialloc.c
index f59741346760..8d0add625870 100644
--- a/fs/ext2/ialloc.c
+++ b/fs/ext2/ialloc.c
@@ -550,7 +550,7 @@ got:
 
         sb->s_dirt = 1;
         mark_buffer_dirty(bh2);
-        inode->i_uid = current->fsuid;
+        inode->i_uid = current_fsuid();
         if (test_opt (sb, GRPID))
                 inode->i_gid = dir->i_gid;
         else if (dir->i_mode & S_ISGID) {
@@ -558,7 +558,7 @@ got:
                 if (S_ISDIR(mode))
                         mode |= S_ISGID;
         } else
-                inode->i_gid = current->fsgid;
+                inode->i_gid = current_fsgid();
         inode->i_mode = mode;
 
         inode->i_ino = ino;
diff --git a/fs/ext3/balloc.c b/fs/ext3/balloc.c
index f5b57a2ca35a..0dbf1c048475 100644
--- a/fs/ext3/balloc.c
+++ b/fs/ext3/balloc.c
@@ -1422,7 +1422,7 @@ static int ext3_has_free_blocks(struct ext3_sb_info *sbi)
         free_blocks = percpu_counter_read_positive(&sbi->s_freeblocks_counter);
         root_blocks = le32_to_cpu(sbi->s_es->s_r_blocks_count);
         if (free_blocks < root_blocks + 1 && !capable(CAP_SYS_RESOURCE) &&
-                sbi->s_resuid != current->fsuid &&
+                sbi->s_resuid != current_fsuid() &&
                 (sbi->s_resgid == 0 || !in_group_p (sbi->s_resgid))) {
                 return 0;
         }
diff --git a/fs/ext3/ialloc.c b/fs/ext3/ialloc.c
index 47b678d73e7a..490bd0ed7896 100644
--- a/fs/ext3/ialloc.c
+++ b/fs/ext3/ialloc.c
@@ -539,7 +539,7 @@ got:
                 percpu_counter_inc(&sbi->s_dirs_counter);
         sb->s_dirt = 1;
 
-        inode->i_uid = current->fsuid;
+        inode->i_uid = current_fsuid();
         if (test_opt (sb, GRPID))
                 inode->i_gid = dir->i_gid;
         else if (dir->i_mode & S_ISGID) {
@@ -547,7 +547,7 @@ got:
                 if (S_ISDIR(mode))
                         mode |= S_ISGID;
         } else
-                inode->i_gid = current->fsgid;
+                inode->i_gid = current_fsgid();
         inode->i_mode = mode;
 
         inode->i_ino = ino;
diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index db35cfdb3c8b..38b3acf5683b 100644
--- a/fs/ext4/balloc.c
+++ b/fs/ext4/balloc.c
@@ -624,7 +624,7 @@ int ext4_has_free_blocks(struct ext4_sb_info *sbi, s64 nblocks)
                 return 1;
 
         /* Hm, nope.  Are (enough) root reserved blocks available? */
-        if (sbi->s_resuid == current->fsuid ||
+        if (sbi->s_resuid == current_fsuid() ||
             ((sbi->s_resgid != 0) && in_group_p(sbi->s_resgid)) ||
             capable(CAP_SYS_RESOURCE)) {
                 if (free_blocks >= (nblocks + dirty_blocks))
diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c
index 2a117e286e54..08cac9fcace2 100644
--- a/fs/ext4/ialloc.c
+++ b/fs/ext4/ialloc.c
@@ -787,7 +787,7 @@ got:
                 spin_unlock(sb_bgl_lock(sbi, flex_group));
         }
 
-        inode->i_uid = current->fsuid;
+        inode->i_uid = current_fsuid();
         if (test_opt(sb, GRPID))
                 inode->i_gid = dir->i_gid;
         else if (dir->i_mode & S_ISGID) {
@@ -795,7 +795,7 @@ got:
                 if (S_ISDIR(mode))
                         mode |= S_ISGID;
         } else
-                inode->i_gid = current->fsgid;
+                inode->i_gid = current_fsgid();
         inode->i_mode = mode;
 
         inode->i_ino = ino + group * EXT4_INODES_PER_GROUP(sb);
diff --git a/fs/fat/file.c b/fs/fat/file.c
index f06a4e525ece..0a7f4a9918b3 100644
--- a/fs/fat/file.c
+++ b/fs/fat/file.c
@@ -304,7 +304,7 @@ static int fat_allow_set_time(struct msdos_sb_info *sbi, struct inode *inode)
 {
         mode_t allow_utime = sbi->options.allow_utime;
 
-        if (current->fsuid != inode->i_uid) {
+        if (current_fsuid() != inode->i_uid) {
                 if (in_group_p(inode->i_gid))
                         allow_utime >>= 3;
                 if (allow_utime & MAY_WRITE)
diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index bdd8fb7be2ca..d937aaf77374 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -926,8 +926,8 @@ static int parse_options(char *options, int is_vfat, int silent, int *debug,
 
         opts->isvfat = is_vfat;
 
-        opts->fs_uid = current->uid;
-        opts->fs_gid = current->gid;
+        opts->fs_uid = current_uid();
+        opts->fs_gid = current_gid();
         opts->fs_fmask = opts->fs_dmask = current->fs->umask;
         opts->allow_utime = -1;
         opts->codepage = fat_default_codepage;
diff --git a/fs/fcntl.c b/fs/fcntl.c
index 549daf8005fb..cdc141946724 100644
--- a/fs/fcntl.c
+++ b/fs/fcntl.c
@@ -212,13 +212,14 @@ static void f_modown(struct file *filp, struct pid *pid, enum pid_type type,
 int __f_setown(struct file *filp, struct pid *pid, enum pid_type type,
                 int force)
 {
+        const struct cred *cred = current_cred();
         int err;
         
         err = security_file_set_fowner(filp);
         if (err)
                 return err;
 
-        f_modown(filp, pid, type, current->uid, current->euid, force);
+        f_modown(filp, pid, type, cred->uid, cred->euid, force);
         return 0;
 }
 EXPORT_SYMBOL(__f_setown);
@@ -407,10 +408,17 @@ static const long band_table[NSIGPOLL] = {
 static inline int sigio_perm(struct task_struct *p,
                              struct fown_struct *fown, int sig)
 {
-        return (((fown->euid == 0) ||
-                 (fown->euid == p->suid) || (fown->euid == p->uid) ||
-                 (fown->uid == p->suid) || (fown->uid == p->uid)) &&
-                !security_file_send_sigiotask(p, fown, sig));
+        const struct cred *cred;
+        int ret;
+
+        rcu_read_lock();
+        cred = __task_cred(p);
+        ret = ((fown->euid == 0 ||
+                fown->euid == cred->suid || fown->euid == cred->uid ||
+                fown->uid  == cred->suid || fown->uid  == cred->uid) &&
+               !security_file_send_sigiotask(p, fown, sig));
+        rcu_read_unlock();
+        return ret;
 }
 
 static void send_sigio_to_task(struct task_struct *p,
diff --git a/fs/file_table.c b/fs/file_table.c
index 5ad0eca6eea2..0fbcacc3ea75 100644
--- a/fs/file_table.c
+++ b/fs/file_table.c
@@ -36,7 +36,9 @@ static struct percpu_counter nr_files __cacheline_aligned_in_smp;
 
 static inline void file_free_rcu(struct rcu_head *head)
 {
-        struct file *f =  container_of(head, struct file, f_u.fu_rcuhead);
+        struct file *f = container_of(head, struct file, f_u.fu_rcuhead);
+
+        put_cred(f->f_cred);
         kmem_cache_free(filp_cachep, f);
 }
 
@@ -94,7 +96,7 @@ int proc_nr_files(ctl_table *table, int write, struct file *filp,
  */
 struct file *get_empty_filp(void)
 {
-        struct task_struct *tsk;
+        const struct cred *cred = current_cred();
         static int old_max;
         struct file * f;
 
@@ -118,12 +120,10 @@ struct file *get_empty_filp(void)
         if (security_file_alloc(f))
                 goto fail_sec;
 
-        tsk = current;
         INIT_LIST_HEAD(&f->f_u.fu_list);
         atomic_long_set(&f->f_count, 1);
         rwlock_init(&f->f_owner.lock);
-        f->f_uid = tsk->fsuid;
-        f->f_gid = tsk->fsgid;
+        f->f_cred = get_cred(cred);
         eventpoll_init_file(f);
         /* f->f_version: 0 */
         return f;
diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index b72361479be2..fba571648a8e 100644
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -87,8 +87,8 @@ static void __fuse_put_request(struct fuse_req *req)
 
 static void fuse_req_init_context(struct fuse_req *req)
 {
-        req->in.h.uid = current->fsuid;
-        req->in.h.gid = current->fsgid;
+        req->in.h.uid = current_fsuid();
+        req->in.h.gid = current_fsgid();
         req->in.h.pid = current->pid;
 }
 
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index fd03330cadeb..95bc22bdd060 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -869,18 +869,25 @@ int fuse_update_attributes(struct inode *inode, struct kstat *stat,
  */
 int fuse_allow_task(struct fuse_conn *fc, struct task_struct *task)
 {
+        const struct cred *cred;
+        int ret;
+
         if (fc->flags & FUSE_ALLOW_OTHER)
                 return 1;
 
-        if (task->euid == fc->user_id &&
-            task->suid == fc->user_id &&
-            task->uid == fc->user_id &&
-            task->egid == fc->group_id &&
-            task->sgid == fc->group_id &&
-            task->gid == fc->group_id)
-                return 1;
+        rcu_read_lock();
+        ret = 0;
+        cred = __task_cred(task);
+        if (cred->euid == fc->user_id &&
+            cred->suid == fc->user_id &&
+            cred->uid  == fc->user_id &&
+            cred->egid == fc->group_id &&
+            cred->sgid == fc->group_id &&
+            cred->gid  == fc->group_id)
+                ret = 1;
+        rcu_read_unlock();
 
-        return 0;
+        return ret;
 }
 
 static int fuse_access(struct inode *inode, int mask)
diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index 7cee695fa441..d57616840e89 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -705,18 +705,18 @@ static void munge_mode_uid_gid(struct gfs2_inode *dip, unsigned int *mode,
             (dip->i_inode.i_mode & S_ISUID) && dip->i_inode.i_uid) {
                 if (S_ISDIR(*mode))
                         *mode |= S_ISUID;
-                else if (dip->i_inode.i_uid != current->fsuid)
+                else if (dip->i_inode.i_uid != current_fsuid())
                         *mode &= ~07111;
                 *uid = dip->i_inode.i_uid;
         } else
-                *uid = current->fsuid;
+                *uid = current_fsuid();
 
         if (dip->i_inode.i_mode & S_ISGID) {
                 if (S_ISDIR(*mode))
                         *mode |= S_ISGID;
                 *gid = dip->i_inode.i_gid;
         } else
-                *gid = current->fsgid;
+                *gid = current_fsgid();
 }
 
 static int alloc_dinode(struct gfs2_inode *dip, u64 *no_addr, u64 *generation)
@@ -1124,8 +1124,8 @@ int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name,
                 return -EPERM;
 
         if ((dip->i_inode.i_mode & S_ISVTX) &&
-            dip->i_inode.i_uid != current->fsuid &&
-            ip->i_inode.i_uid != current->fsuid && !capable(CAP_FOWNER))
+            dip->i_inode.i_uid != current_fsuid() &&
+            ip->i_inode.i_uid != current_fsuid() && !capable(CAP_FOWNER))
                 return -EPERM;
 
         if (IS_APPEND(&dip->i_inode))
diff --git a/fs/hfs/inode.c b/fs/hfs/inode.c
index c69b7ac75bf7..9435dda8f1e0 100644
--- a/fs/hfs/inode.c
+++ b/fs/hfs/inode.c
@@ -155,8 +155,8 @@ struct inode *hfs_new_inode(struct inode *dir, struct qstr *name, int mode)
         hfs_cat_build_key(sb, (btree_key *)&HFS_I(inode)->cat_key, dir->i_ino, name);
         inode->i_ino = HFS_SB(sb)->next_id++;
         inode->i_mode = mode;
-        inode->i_uid = current->fsuid;
-        inode->i_gid = current->fsgid;
+        inode->i_uid = current_fsuid();
+        inode->i_gid = current_fsgid();
         inode->i_nlink = 1;
         inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
         HFS_I(inode)->flags = 0;
diff --git a/fs/hfs/super.c b/fs/hfs/super.c
index 3c7c7637719c..c8b5acf4b0b7 100644
--- a/fs/hfs/super.c
+++ b/fs/hfs/super.c
@@ -210,8 +210,8 @@ static int parse_options(char *options, struct hfs_sb_info *hsb)
         int tmp, token;
 
         /* initialize the sb with defaults */
-        hsb->s_uid = current->uid;
-        hsb->s_gid = current->gid;
+        hsb->s_uid = current_uid();
+        hsb->s_gid = current_gid();
         hsb->s_file_umask = 0133;
         hsb->s_dir_umask = 0022;
         hsb->s_type = hsb->s_creator = cpu_to_be32(0x3f3f3f3f); /* == '????' */
diff --git a/fs/hfsplus/inode.c b/fs/hfsplus/inode.c
index b207f0e6fc22..f105ee9e1cc4 100644
--- a/fs/hfsplus/inode.c
+++ b/fs/hfsplus/inode.c
@@ -296,8 +296,8 @@ struct inode *hfsplus_new_inode(struct super_block *sb, int mode)
 
         inode->i_ino = HFSPLUS_SB(sb).next_cnid++;
         inode->i_mode = mode;
-        inode->i_uid = current->fsuid;
-        inode->i_gid = current->fsgid;
+        inode->i_uid = current_fsuid();
+        inode->i_gid = current_fsgid();
         inode->i_nlink = 1;
         inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
         INIT_LIST_HEAD(&HFSPLUS_I(inode).open_dir_list);
diff --git a/fs/hfsplus/options.c b/fs/hfsplus/options.c
index 9699c56d323f..bab7f8d1bdfa 100644
--- a/fs/hfsplus/options.c
+++ b/fs/hfsplus/options.c
@@ -49,8 +49,8 @@ void hfsplus_fill_defaults(struct hfsplus_sb_info *opts)
         opts->creator = HFSPLUS_DEF_CR_TYPE;
         opts->type = HFSPLUS_DEF_CR_TYPE;
         opts->umask = current->fs->umask;
-        opts->uid = current->uid;
-        opts->gid = current->gid;
+        opts->uid = current_uid();
+        opts->gid = current_gid();
         opts->part = -1;
         opts->session = -1;
 }
diff --git a/fs/hpfs/namei.c b/fs/hpfs/namei.c
index 10783f3d265a..b649232dde97 100644
--- a/fs/hpfs/namei.c
+++ b/fs/hpfs/namei.c
@@ -92,11 +92,11 @@ static int hpfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
         inc_nlink(dir);
         insert_inode_hash(result);
 
-        if (result->i_uid != current->fsuid ||
-            result->i_gid != current->fsgid ||
+        if (result->i_uid != current_fsuid() ||
+            result->i_gid != current_fsgid() ||
             result->i_mode != (mode | S_IFDIR)) {
-                result->i_uid = current->fsuid;
-                result->i_gid = current->fsgid;
+                result->i_uid = current_fsuid();
+                result->i_gid = current_fsgid();
                 result->i_mode = mode | S_IFDIR;
                 hpfs_write_inode_nolock(result);
         }
@@ -184,11 +184,11 @@ static int hpfs_create(struct inode *dir, struct dentry *dentry, int mode, struc
 
         insert_inode_hash(result);
 
-        if (result->i_uid != current->fsuid ||
-            result->i_gid != current->fsgid ||
+        if (result->i_uid != current_fsuid() ||
+            result->i_gid != current_fsgid() ||
             result->i_mode != (mode | S_IFREG)) {
-                result->i_uid = current->fsuid;
-                result->i_gid = current->fsgid;
+                result->i_uid = current_fsuid();
+                result->i_gid = current_fsgid();
                 result->i_mode = mode | S_IFREG;
                 hpfs_write_inode_nolock(result);
         }
@@ -247,8 +247,8 @@ static int hpfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t
         result->i_mtime.tv_nsec = 0;
         result->i_atime.tv_nsec = 0;
         hpfs_i(result)->i_ea_size = 0;
-        result->i_uid = current->fsuid;
-        result->i_gid = current->fsgid;
+        result->i_uid = current_fsuid();
+        result->i_gid = current_fsgid();
         result->i_nlink = 1;
         result->i_size = 0;
         result->i_blocks = 1;
@@ -325,8 +325,8 @@ static int hpfs_symlink(struct inode *dir, struct dentry *dentry, const char *sy
         result->i_atime.tv_nsec = 0;
         hpfs_i(result)->i_ea_size = 0;
         result->i_mode = S_IFLNK | 0777;
-        result->i_uid = current->fsuid;
-        result->i_gid = current->fsgid;
+        result->i_uid = current_fsuid();
+        result->i_gid = current_fsgid();
         result->i_blocks = 1;
         result->i_nlink = 1;
         result->i_size = strlen(symlink);
diff --git a/fs/hpfs/super.c b/fs/hpfs/super.c
index 29ad461d568f..0d049b8919c4 100644
--- a/fs/hpfs/super.c
+++ b/fs/hpfs/super.c
@@ -475,8 +475,8 @@ static int hpfs_fill_super(struct super_block *s, void *options, int silent)
 
         init_MUTEX(&sbi->hpfs_creation_de);
 
-        uid = current->uid;
-        gid = current->gid;
+        uid = current_uid();
+        gid = current_gid();
         umask = current->fs->umask;
         lowercase = 0;
         conv = CONV_BINARY;
diff --git a/fs/hppfs/hppfs.c b/fs/hppfs/hppfs.c
index 2b3d1828db99..b278f7f52024 100644
--- a/fs/hppfs/hppfs.c
+++ b/fs/hppfs/hppfs.c
@@ -426,6 +426,7 @@ static int file_mode(int fmode)
 
 static int hppfs_open(struct inode *inode, struct file *file)
 {
+        const struct cred *cred = file->f_cred;
         struct hppfs_private *data;
         struct vfsmount *proc_mnt;
         struct dentry *proc_dentry;
@@ -446,7 +447,7 @@ static int hppfs_open(struct inode *inode, struct file *file)
 
         /* XXX This isn't closed anywhere */
         data->proc_file = dentry_open(dget(proc_dentry), mntget(proc_mnt),
-                                      file_mode(file->f_mode));
+                                      file_mode(file->f_mode), cred);
         err = PTR_ERR(data->proc_file);
         if (IS_ERR(data->proc_file))
                 goto out_free1;
@@ -489,6 +490,7 @@ static int hppfs_open(struct inode *inode, struct file *file)
 
 static int hppfs_dir_open(struct inode *inode, struct file *file)
 {
+        const struct cred *cred = file->f_cred;
         struct hppfs_private *data;
         struct vfsmount *proc_mnt;
         struct dentry *proc_dentry;
@@ -502,7 +504,7 @@ static int hppfs_dir_open(struct inode *inode, struct file *file)
         proc_dentry = HPPFS_I(inode)->proc_dentry;
         proc_mnt = inode->i_sb->s_fs_info;
         data->proc_file = dentry_open(dget(proc_dentry), mntget(proc_mnt),
-                                      file_mode(file->f_mode));
+                                      file_mode(file->f_mode), cred);
         err = PTR_ERR(data->proc_file);
         if (IS_ERR(data->proc_file))
                 goto out_free;
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index 61edc701b0e6..7d479ce3aceb 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -551,9 +551,9 @@ static int hugetlbfs_mknod(struct inode *dir,
                 if (S_ISDIR(mode))
                         mode |= S_ISGID;
         } else {
-                gid = current->fsgid;
+                gid = current_fsgid();
         }
-        inode = hugetlbfs_get_inode(dir->i_sb, current->fsuid, gid, mode, dev);
+        inode = hugetlbfs_get_inode(dir->i_sb, current_fsuid(), gid, mode, dev);
         if (inode) {
                 dir->i_ctime = dir->i_mtime = CURRENT_TIME;
                 d_instantiate(dentry, inode);
@@ -586,9 +586,9 @@ static int hugetlbfs_symlink(struct inode *dir,
         if (dir->i_mode & S_ISGID)
                 gid = dir->i_gid;
         else
-                gid = current->fsgid;
+                gid = current_fsgid();
 
-        inode = hugetlbfs_get_inode(dir->i_sb, current->fsuid,
+        inode = hugetlbfs_get_inode(dir->i_sb, current_fsuid(),
                                         gid, S_IFLNK|S_IRWXUGO, 0);
         if (inode) {
                 int l = strlen(symname)+1;
@@ -854,8 +854,8 @@ hugetlbfs_fill_super(struct super_block *sb, void *data, int silent)
 
         config.nr_blocks = -1; /* No limit on size by default */
         config.nr_inodes = -1; /* No limit on number of inodes by default */
-        config.uid = current->fsuid;
-        config.gid = current->fsgid;
+        config.uid = current_fsuid();
+        config.gid = current_fsgid();
         config.mode = 0755;
         config.hstate = &default_hstate;
         ret = hugetlbfs_parse_options(data, &config);
@@ -951,6 +951,7 @@ struct file *hugetlb_file_setup(const char *name, size_t size)
         struct inode *inode;
         struct dentry *dentry, *root;
         struct qstr quick_string;
+        struct user_struct *user = current_user();
 
         if (!hugetlbfs_vfsmount)
                 return ERR_PTR(-ENOENT);
@@ -958,7 +959,7 @@ struct file *hugetlb_file_setup(const char *name, size_t size)
         if (!can_do_hugetlb_shm())
                 return ERR_PTR(-EPERM);
 
-        if (!user_shm_lock(size, current->user))
+        if (!user_shm_lock(size, user))
                 return ERR_PTR(-ENOMEM);
 
         root = hugetlbfs_vfsmount->mnt_root;
@@ -970,8 +971,8 @@ struct file *hugetlb_file_setup(const char *name, size_t size)
                 goto out_shm_unlock;
 
         error = -ENOSPC;
-        inode = hugetlbfs_get_inode(root->d_sb, current->fsuid,
-                                current->fsgid, S_IFREG | S_IRWXUGO, 0);
+        inode = hugetlbfs_get_inode(root->d_sb, current_fsuid(),
+                                current_fsgid(), S_IFREG | S_IRWXUGO, 0);
         if (!inode)
                 goto out_dentry;
 
@@ -998,7 +999,7 @@ out_inode:
 out_dentry:
         dput(dentry);
 out_shm_unlock:
-        user_shm_unlock(size, current->user);
+        user_shm_unlock(size, user);
         return ERR_PTR(error);
 }
 
diff --git a/fs/inotify_user.c b/fs/inotify_user.c
index d367e9b92862..e2425bbd871f 100644
--- a/fs/inotify_user.c
+++ b/fs/inotify_user.c
@@ -601,7 +601,7 @@ asmlinkage long sys_inotify_init1(int flags)
                 goto out_put_fd;
         }
 
-        user = get_uid(current->user);
+        user = get_current_user();
         if (unlikely(atomic_read(&user->inotify_devs) >=
                         inotify_max_user_instances)) {
                 ret = -EMFILE;
diff --git a/fs/internal.h b/fs/internal.h
index 80aa9a023372..53af885f1732 100644
--- a/fs/internal.h
+++ b/fs/internal.h
@@ -10,6 +10,7 @@
  */
 
 struct super_block;
+struct linux_binprm;
 
 /*
  * block_dev.c
@@ -40,6 +41,11 @@ static inline int sb_is_blkdev_sb(struct super_block *sb)
 extern void __init chrdev_init(void);
 
 /*
+ * exec.c
+ */
+extern void check_unsafe_exec(struct linux_binprm *);
+
+/*
  * namespace.c
  */
 extern int copy_mount_options(const void __user *, unsigned long *);
diff --git a/fs/ioprio.c b/fs/ioprio.c
index da3cc460d4df..3569e0ad86a2 100644
--- a/fs/ioprio.c
+++ b/fs/ioprio.c
@@ -31,10 +31,16 @@ static int set_task_ioprio(struct task_struct *task, int ioprio)
 {
         int err;
         struct io_context *ioc;
+        const struct cred *cred = current_cred(), *tcred;
 
-        if (task->uid != current->euid &&
-            task->uid != current->uid && !capable(CAP_SYS_NICE))
+        rcu_read_lock();
+        tcred = __task_cred(task);
+        if (tcred->uid != cred->euid &&
+            tcred->uid != cred->uid && !capable(CAP_SYS_NICE)) {
+                rcu_read_unlock();
                 return -EPERM;
+        }
+        rcu_read_unlock();
 
         err = security_task_setioprio(task, ioprio);
         if (err)
@@ -123,7 +129,7 @@ asmlinkage long sys_ioprio_set(int which, int who, int ioprio)
                         break;
                 case IOPRIO_WHO_USER:
                         if (!who)
-                                user = current->user;
+                                user = current_user();
                         else
                                 user = find_user(who);
 
@@ -131,7 +137,7 @@ asmlinkage long sys_ioprio_set(int which, int who, int ioprio)
                                 break;
 
                         do_each_thread(g, p) {
-                                if (p->uid != who)
+                                if (__task_cred(p)->uid != who)
                                         continue;
                                 ret = set_task_ioprio(p, ioprio);
                                 if (ret)
@@ -216,7 +222,7 @@ asmlinkage long sys_ioprio_get(int which, int who)
                         break;
                 case IOPRIO_WHO_USER:
                         if (!who)
-                                user = current->user;
+                                user = current_user();
                         else
                                 user = find_user(who);
 
@@ -224,7 +230,7 @@ asmlinkage long sys_ioprio_get(int which, int who)
                                 break;
 
                         do_each_thread(g, p) {
-                                if (p->uid != user->uid)
+                                if (__task_cred(p)->uid != user->uid)
                                         continue;
                                 tmpio = get_task_ioprio(p);
                                 if (tmpio < 0)
diff --git a/fs/jfs/jfs_inode.c b/fs/jfs/jfs_inode.c
index ed6574bee51a..70022fd1c539 100644
--- a/fs/jfs/jfs_inode.c
+++ b/fs/jfs/jfs_inode.c
@@ -93,13 +93,13 @@ struct inode *ialloc(struct inode *parent, umode_t mode)
                 return ERR_PTR(rc);
         }
 
-        inode->i_uid = current->fsuid;
+        inode->i_uid = current_fsuid();
         if (parent->i_mode & S_ISGID) {
                 inode->i_gid = parent->i_gid;
                 if (S_ISDIR(mode))
                         mode |= S_ISGID;
         } else
-                inode->i_gid = current->fsgid;
+                inode->i_gid = current_fsgid();
 
         /*
          * New inodes need to save sane values on disk when
diff --git a/fs/locks.c b/fs/locks.c
index 09062e3ff104..46a2e12f7d42 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -1349,7 +1349,7 @@ int generic_setlease(struct file *filp, long arg, struct file_lock **flp)
         struct inode *inode = dentry->d_inode;
         int error, rdlease_count = 0, wrlease_count = 0;
 
-        if ((current->fsuid != inode->i_uid) && !capable(CAP_LEASE))
+        if ((current_fsuid() != inode->i_uid) && !capable(CAP_LEASE))
                 return -EACCES;
         if (!S_ISREG(inode->i_mode))
                 return -EINVAL;
diff --git a/fs/minix/bitmap.c b/fs/minix/bitmap.c
index 703cc35e04b9..3aebe322271a 100644
--- a/fs/minix/bitmap.c
+++ b/fs/minix/bitmap.c
@@ -262,8 +262,8 @@ struct inode * minix_new_inode(const struct inode * dir, int * error)
                 iput(inode);
                 return NULL;
         }
-        inode->i_uid = current->fsuid;
-        inode->i_gid = (dir->i_mode & S_ISGID) ? dir->i_gid : current->fsgid;
+        inode->i_uid = current_fsuid();
+        inode->i_gid = (dir->i_mode & S_ISGID) ? dir->i_gid : current_fsgid();
         inode->i_ino = j;
         inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
         inode->i_blocks = 0;
diff --git a/fs/namei.c b/fs/namei.c
index d34e0f9681c6..af3783fff1de 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -186,7 +186,7 @@ int generic_permission(struct inode *inode, int mask,
 
         mask &= MAY_READ | MAY_WRITE | MAY_EXEC;
 
-        if (current->fsuid == inode->i_uid)
+        if (current_fsuid() == inode->i_uid)
                 mode >>= 6;
         else {
                 if (IS_POSIXACL(inode) && (mode & S_IRWXG) && check_acl) {
@@ -441,7 +441,7 @@ static int exec_permission_lite(struct inode *inode)
         if (inode->i_op && inode->i_op->permission)
                 return -EAGAIN;
 
-        if (current->fsuid == inode->i_uid)
+        if (current_fsuid() == inode->i_uid)
                 mode >>= 6;
         else if (in_group_p(inode->i_gid))
                 mode >>= 3;
@@ -1334,11 +1334,13 @@ static int user_path_parent(int dfd, const char __user *path,
  */
 static inline int check_sticky(struct inode *dir, struct inode *inode)
 {
+        uid_t fsuid = current_fsuid();
+
         if (!(dir->i_mode & S_ISVTX))
                 return 0;
-        if (inode->i_uid == current->fsuid)
+        if (inode->i_uid == fsuid)
                 return 0;
-        if (dir->i_uid == current->fsuid)
+        if (dir->i_uid == fsuid)
                 return 0;
         return !capable(CAP_FOWNER);
 }
diff --git a/fs/namespace.c b/fs/namespace.c
index 65b3dc844c87..1c09cab8f7cf 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -1176,7 +1176,7 @@ static int mount_is_safe(struct path *path)
         if (S_ISLNK(path->dentry->d_inode->i_mode))
                 return -EPERM;
         if (path->dentry->d_inode->i_mode & S_ISVTX) {
-                if (current->uid != path->dentry->d_inode->i_uid)
+                if (current_uid() != path->dentry->d_inode->i_uid)
                         return -EPERM;
         }
         if (inode_permission(path->dentry->d_inode, MAY_WRITE))
diff --git a/fs/ncpfs/ioctl.c b/fs/ncpfs/ioctl.c
index 3a97c95e1ca2..6d04e050c74e 100644
--- a/fs/ncpfs/ioctl.c
+++ b/fs/ncpfs/ioctl.c
@@ -40,10 +40,10 @@ ncp_get_fs_info(struct ncp_server * server, struct file *file,
         struct inode *inode = file->f_path.dentry->d_inode;
         struct ncp_fs_info info;
 
-        if ((file_permission(file, MAY_WRITE) != 0)
-            && (current->uid != server->m.mounted_uid)) {
+        if (file_permission(file, MAY_WRITE) != 0
+            && current_uid() != server->m.mounted_uid)
                 return -EACCES;
-        }
+
         if (copy_from_user(&info, arg, sizeof(info)))
                 return -EFAULT;
 
@@ -70,10 +70,10 @@ ncp_get_fs_info_v2(struct ncp_server * server, struct file *file,
         struct inode *inode = file->f_path.dentry->d_inode;
         struct ncp_fs_info_v2 info2;
 
-        if ((file_permission(file, MAY_WRITE) != 0)
-            && (current->uid != server->m.mounted_uid)) {
+        if (file_permission(file, MAY_WRITE) != 0
+            && current_uid() != server->m.mounted_uid)
                 return -EACCES;
-        }
+
         if (copy_from_user(&info2, arg, sizeof(info2)))
                 return -EFAULT;
 
@@ -141,10 +141,10 @@ ncp_get_compat_fs_info_v2(struct ncp_server * server, struct file *file,
         struct inode *inode = file->f_path.dentry->d_inode;
         struct compat_ncp_fs_info_v2 info2;
 
-        if ((file_permission(file, MAY_WRITE) != 0)
-            && (current->uid != server->m.mounted_uid)) {
+        if (file_permission(file, MAY_WRITE) != 0
+            && current_uid() != server->m.mounted_uid)
                 return -EACCES;
-        }
+
         if (copy_from_user(&info2, arg, sizeof(info2)))
                 return -EFAULT;
 
@@ -270,16 +270,17 @@ static int __ncp_ioctl(struct inode *inode, struct file *filp,
         struct ncp_ioctl_request request;
         char* bouncebuffer;
         void __user *argp = (void __user *)arg;
+        uid_t uid = current_uid();
 
         switch (cmd) {
 #ifdef CONFIG_COMPAT
         case NCP_IOC_NCPREQUEST_32:
 #endif
         case NCP_IOC_NCPREQUEST:
-                if ((file_permission(filp, MAY_WRITE) != 0)
-                    && (current->uid != server->m.mounted_uid)) {
+                if (file_permission(filp, MAY_WRITE) != 0
+                    && uid != server->m.mounted_uid)
                         return -EACCES;
-                }
+
 #ifdef CONFIG_COMPAT
                 if (cmd == NCP_IOC_NCPREQUEST_32) {
                         struct compat_ncp_ioctl_request request32;
@@ -356,10 +357,10 @@ static int __ncp_ioctl(struct inode *inode, struct file *filp,
         case NCP_IOC_GETMOUNTUID16:
         case NCP_IOC_GETMOUNTUID32:
         case NCP_IOC_GETMOUNTUID64:
-                if ((file_permission(filp, MAY_READ) != 0)
-                        && (current->uid != server->m.mounted_uid)) {
+                if (file_permission(filp, MAY_READ) != 0
+                        && uid != server->m.mounted_uid)
                         return -EACCES;
-                }
+
                 if (cmd == NCP_IOC_GETMOUNTUID16) {
                         u16 uid;
                         SET_UID(uid, server->m.mounted_uid);
@@ -380,11 +381,10 @@ static int __ncp_ioctl(struct inode *inode, struct file *filp,
                 {
                         struct ncp_setroot_ioctl sr;
 
-                        if ((file_permission(filp, MAY_READ) != 0)
-                            && (current->uid != server->m.mounted_uid))
-                        {
+                        if (file_permission(filp, MAY_READ) != 0
+                            && uid != server->m.mounted_uid)
                                 return -EACCES;
-                        }
+
                         if (server->m.mounted_vol[0]) {
                                 struct dentry* dentry = inode->i_sb->s_root;
 
@@ -408,6 +408,7 @@ static int __ncp_ioctl(struct inode *inode, struct file *filp,
                                 return -EFAULT;
                         return 0;
                 }
+
         case NCP_IOC_SETROOT:
                 {
                         struct ncp_setroot_ioctl sr;
@@ -455,11 +456,10 @@ static int __ncp_ioctl(struct inode *inode, struct file *filp,
 
 #ifdef CONFIG_NCPFS_PACKET_SIGNING      
         case NCP_IOC_SIGN_INIT:
-                if ((file_permission(filp, MAY_WRITE) != 0)
-                    && (current->uid != server->m.mounted_uid))
-                {
+                if (file_permission(filp, MAY_WRITE) != 0
+                    && uid != server->m.mounted_uid)
                         return -EACCES;
-                }
+
                 if (argp) {
                         if (server->sign_wanted)
                         {
@@ -478,24 +478,22 @@ static int __ncp_ioctl(struct inode *inode, struct file *filp,
                 return 0;               
                 
         case NCP_IOC_SIGN_WANTED:
-                if ((file_permission(filp, MAY_READ) != 0)
-                    && (current->uid != server->m.mounted_uid))
-                {
+                if (file_permission(filp, MAY_READ) != 0
+                    && uid != server->m.mounted_uid)
                         return -EACCES;
-                }
                 
                 if (put_user(server->sign_wanted, (int __user *)argp))
                         return -EFAULT;
                 return 0;
+
         case NCP_IOC_SET_SIGN_WANTED:
                 {
                         int newstate;
 
-                        if ((file_permission(filp, MAY_WRITE) != 0)
-                            && (current->uid != server->m.mounted_uid))
-                        {
+                        if (file_permission(filp, MAY_WRITE) != 0
+                            && uid != server->m.mounted_uid)
                                 return -EACCES;
-                        }
+
                         /* get only low 8 bits... */
                         if (get_user(newstate, (unsigned char __user *)argp))
                                 return -EFAULT;
@@ -512,11 +510,10 @@ static int __ncp_ioctl(struct inode *inode, struct file *filp,
 
 #ifdef CONFIG_NCPFS_IOCTL_LOCKING
         case NCP_IOC_LOCKUNLOCK:
-                if ((file_permission(filp, MAY_WRITE) != 0)
-                    && (current->uid != server->m.mounted_uid))
-                {
+                if (file_permission(filp, MAY_WRITE) != 0
+                    && uid != server->m.mounted_uid)
                         return -EACCES;
-                }
+
                 {
                         struct ncp_lock_ioctl    rqdata;
 
@@ -585,9 +582,8 @@ outrel:
 
 #ifdef CONFIG_COMPAT
         case NCP_IOC_GETOBJECTNAME_32:
-                if (current->uid != server->m.mounted_uid) {
+                if (uid != server->m.mounted_uid)
                         return -EACCES;
-                }
                 {
                         struct compat_ncp_objectname_ioctl user;
                         size_t outl;
@@ -609,10 +605,10 @@ outrel:
                         return 0;
                 }
 #endif
+
         case NCP_IOC_GETOBJECTNAME:
-                if (current->uid != server->m.mounted_uid) {
+                if (uid != server->m.mounted_uid)
                         return -EACCES;
-                }
                 {
                         struct ncp_objectname_ioctl user;
                         size_t outl;
@@ -633,13 +629,13 @@ outrel:
                                 return -EFAULT;
                         return 0;
                 }
+
 #ifdef CONFIG_COMPAT
         case NCP_IOC_SETOBJECTNAME_32:
 #endif
         case NCP_IOC_SETOBJECTNAME:
-                if (current->uid != server->m.mounted_uid) {
+                if (uid != server->m.mounted_uid)
                         return -EACCES;
-                }
                 {
                         struct ncp_objectname_ioctl user;
                         void* newname;
@@ -691,13 +687,13 @@ outrel:
                         kfree(oldname);
                         return 0;
                 }
+
 #ifdef CONFIG_COMPAT
         case NCP_IOC_GETPRIVATEDATA_32:
 #endif
         case NCP_IOC_GETPRIVATEDATA:
-                if (current->uid != server->m.mounted_uid) {
+                if (uid != server->m.mounted_uid)
                         return -EACCES;
-                }
                 {
                         struct ncp_privatedata_ioctl user;
                         size_t outl;
@@ -736,13 +732,13 @@ outrel:
 
                         return 0;
                 }
+
 #ifdef CONFIG_COMPAT
         case NCP_IOC_SETPRIVATEDATA_32:
 #endif
         case NCP_IOC_SETPRIVATEDATA:
-                if (current->uid != server->m.mounted_uid) {
+                if (uid != server->m.mounted_uid)
                         return -EACCES;
-                }
                 {
                         struct ncp_privatedata_ioctl user;
                         void* new;
@@ -794,9 +790,10 @@ outrel:
 #endif /* CONFIG_NCPFS_NLS */
 
         case NCP_IOC_SETDENTRYTTL:
-                if ((file_permission(filp, MAY_WRITE) != 0) &&
-                                 (current->uid != server->m.mounted_uid))
+                if (file_permission(filp, MAY_WRITE) != 0 &&
+                    uid != server->m.mounted_uid)
                         return -EACCES;
+
                 {
                         u_int32_t user;
 
diff --git a/fs/nfsctl.c b/fs/nfsctl.c
index aed8145d9087..b1acbd6ab6fb 100644
--- a/fs/nfsctl.c
+++ b/fs/nfsctl.c
@@ -10,6 +10,8 @@
 #include <linux/sunrpc/svc.h>
 #include <linux/nfsd/nfsd.h>
 #include <linux/nfsd/syscall.h>
+#include <linux/cred.h>
+#include <linux/sched.h>
 #include <linux/linkage.h>
 #include <linux/namei.h>
 #include <linux/mount.h>
@@ -41,7 +43,8 @@ static struct file *do_open(char *name, int flags)
                 error = may_open(&nd, MAY_WRITE, FMODE_WRITE);
 
         if (!error)
-                return dentry_open(nd.path.dentry, nd.path.mnt, flags);
+                return dentry_open(nd.path.dentry, nd.path.mnt, flags,
+                                   current_cred());
 
         path_put(&nd.path);
         return ERR_PTR(error);
diff --git a/fs/nfsd/auth.c b/fs/nfsd/auth.c
index 294992e9bf69..0184fe9b514c 100644
--- a/fs/nfsd/auth.c
+++ b/fs/nfsd/auth.c
@@ -27,53 +27,70 @@ int nfsexp_flags(struct svc_rqst *rqstp, struct svc_export *exp)
 
 int nfsd_setuser(struct svc_rqst *rqstp, struct svc_export *exp)
 {
-        struct svc_cred cred = rqstp->rq_cred;
+        struct group_info *rqgi;
+        struct group_info *gi;
+        struct cred *new;
         int i;
         int flags = nfsexp_flags(rqstp, exp);
         int ret;
 
+        /* discard any old override before preparing the new set */
+        revert_creds(get_cred(current->real_cred));
+        new = prepare_creds();
+        if (!new)
+                return -ENOMEM;
+
+        new->fsuid = rqstp->rq_cred.cr_uid;
+        new->fsgid = rqstp->rq_cred.cr_gid;
+
+        rqgi = rqstp->rq_cred.cr_group_info;
+
         if (flags & NFSEXP_ALLSQUASH) {
-                cred.cr_uid = exp->ex_anon_uid;
-                cred.cr_gid = exp->ex_anon_gid;
-                cred.cr_group_info = groups_alloc(0);
+                new->fsuid = exp->ex_anon_uid;
+                new->fsgid = exp->ex_anon_gid;
+                gi = groups_alloc(0);
         } else if (flags & NFSEXP_ROOTSQUASH) {
-                struct group_info *gi;
-                if (!cred.cr_uid)
-                        cred.cr_uid = exp->ex_anon_uid;
-                if (!cred.cr_gid)
-                        cred.cr_gid = exp->ex_anon_gid;
-                gi = groups_alloc(cred.cr_group_info->ngroups);
-                if (gi)
-                        for (i = 0; i < cred.cr_group_info->ngroups; i++) {
-                                if (!GROUP_AT(cred.cr_group_info, i))
-                                        GROUP_AT(gi, i) = exp->ex_anon_gid;
-                                else
-                                        GROUP_AT(gi, i) = GROUP_AT(cred.cr_group_info, i);
-                        }
-                cred.cr_group_info = gi;
-        } else
-                get_group_info(cred.cr_group_info);
-
-        if (cred.cr_uid != (uid_t) -1)
-                current->fsuid = cred.cr_uid;
-        else
-                current->fsuid = exp->ex_anon_uid;
-        if (cred.cr_gid != (gid_t) -1)
-                current->fsgid = cred.cr_gid;
-        else
-                current->fsgid = exp->ex_anon_gid;
+                if (!new->fsuid)
+                        new->fsuid = exp->ex_anon_uid;
+                if (!new->fsgid)
+                        new->fsgid = exp->ex_anon_gid;
 
-        if (!cred.cr_group_info)
-                return -ENOMEM;
-        ret = set_current_groups(cred.cr_group_info);
-        put_group_info(cred.cr_group_info);
-        if ((cred.cr_uid)) {
-                current->cap_effective =
-                        cap_drop_nfsd_set(current->cap_effective);
+                gi = groups_alloc(rqgi->ngroups);
+                if (!gi)
+                        goto oom;
+
+                for (i = 0; i < rqgi->ngroups; i++) {
+                        if (!GROUP_AT(rqgi, i))
+                                GROUP_AT(gi, i) = exp->ex_anon_gid;
+                        else
+                                GROUP_AT(gi, i) = GROUP_AT(rqgi, i);
+                }
         } else {
-                current->cap_effective =
-                        cap_raise_nfsd_set(current->cap_effective,
-                                           current->cap_permitted);
+                gi = get_group_info(rqgi);
         }
+
+        if (new->fsuid == (uid_t) -1)
+                new->fsuid = exp->ex_anon_uid;
+        if (new->fsgid == (gid_t) -1)
+                new->fsgid = exp->ex_anon_gid;
+
+        ret = set_groups(new, gi);
+        put_group_info(gi);
+        if (!ret)
+                goto error;
+
+        if (new->uid)
+                new->cap_effective = cap_drop_nfsd_set(new->cap_effective);
+        else
+                new->cap_effective = cap_raise_nfsd_set(new->cap_effective,
+                                                        new->cap_permitted);
+        put_cred(override_creds(new));
+        return 0;
+
+oom:
+        ret = -ENOMEM;
+error:
+        abort_creds(new);
         return ret;
 }
+
diff --git a/fs/nfsd/nfs4recover.c b/fs/nfsd/nfs4recover.c
index b79ec930d9f1..0f9d6efaa62b 100644
--- a/fs/nfsd/nfs4recover.c
+++ b/fs/nfsd/nfs4recover.c
@@ -54,20 +54,26 @@
 static struct path rec_dir;
 static int rec_dir_init = 0;
 
-static void
-nfs4_save_user(uid_t *saveuid, gid_t *savegid)
+static int
+nfs4_save_creds(const struct cred **original_creds)
 {
-        *saveuid = current->fsuid;
-        *savegid = current->fsgid;
-        current->fsuid = 0;
-        current->fsgid = 0;
+        struct cred *new;
+
+        new = prepare_creds();
+        if (!new)
+                return -ENOMEM;
+
+        new->fsuid = 0;
+        new->fsgid = 0;
+        *original_creds = override_creds(new);
+        put_cred(new);
+        return 0;
 }
 
 static void
-nfs4_reset_user(uid_t saveuid, gid_t savegid)
+nfs4_reset_creds(const struct cred *original)
 {
-        current->fsuid = saveuid;
-        current->fsgid = savegid;
+        revert_creds(original);
 }
 
 static void
@@ -129,10 +135,9 @@ nfsd4_sync_rec_dir(void)
 int
 nfsd4_create_clid_dir(struct nfs4_client *clp)
 {
+        const struct cred *original_cred;
         char *dname = clp->cl_recdir;
         struct dentry *dentry;
-        uid_t uid;
-        gid_t gid;
         int status;
 
         dprintk("NFSD: nfsd4_create_clid_dir for \"%s\"\n", dname);
@@ -140,7 +145,9 @@ nfsd4_create_clid_dir(struct nfs4_client *clp)
         if (!rec_dir_init || clp->cl_firststate)
                 return 0;
 
-        nfs4_save_user(&uid, &gid);
+        status = nfs4_save_creds(&original_cred);
+        if (status < 0)
+                return status;
 
         /* lock the parent */
         mutex_lock(&rec_dir.dentry->d_inode->i_mutex);
@@ -168,7 +175,7 @@ out_unlock:
                 clp->cl_firststate = 1;
                 nfsd4_sync_rec_dir();
         }
-        nfs4_reset_user(uid, gid);
+        nfs4_reset_creds(original_cred);
         dprintk("NFSD: nfsd4_create_clid_dir returns %d\n", status);
         return status;
 }
@@ -211,26 +218,29 @@ nfsd4_build_dentrylist(void *arg, const char *name, int namlen,
 static int
 nfsd4_list_rec_dir(struct dentry *dir, recdir_func *f)
 {
+        const struct cred *original_cred;
         struct file *filp;
         struct dentry_list_arg dla = {
                 .parent = dir,
         };
         struct list_head *dentries = &dla.dentries;
         struct dentry_list *child;
-        uid_t uid;
-        gid_t gid;
         int status;
 
         if (!rec_dir_init)
                 return 0;
 
-        nfs4_save_user(&uid, &gid);
+        status = nfs4_save_creds(&original_cred);
+        if (status < 0)
+                return status;
         INIT_LIST_HEAD(dentries);
 
-        filp = dentry_open(dget(dir), mntget(rec_dir.mnt), O_RDONLY);
+        filp = dentry_open(dget(dir), mntget(rec_dir.mnt), O_RDONLY,
+                           current_cred());
         status = PTR_ERR(filp);
         if (IS_ERR(filp))
                 goto out;
+        INIT_LIST_HEAD(dentries);
         status = vfs_readdir(filp, nfsd4_build_dentrylist, &dla);
         fput(filp);
         while (!list_empty(dentries)) {
@@ -249,7 +259,7 @@ out:
                 dput(child->dentry);
                 kfree(child);
         }
-        nfs4_reset_user(uid, gid);
+        nfs4_reset_creds(original_cred);
         return status;
 }
 
@@ -311,8 +321,7 @@ out:
 void
 nfsd4_remove_clid_dir(struct nfs4_client *clp)
 {
-        uid_t uid;
-        gid_t gid;
+        const struct cred *original_cred;
         int status;
 
         if (!rec_dir_init || !clp->cl_firststate)
@@ -322,9 +331,13 @@ nfsd4_remove_clid_dir(struct nfs4_client *clp)
         if (status)
                 goto out;
         clp->cl_firststate = 0;
-        nfs4_save_user(&uid, &gid);
+
+        status = nfs4_save_creds(&original_cred);
+        if (status < 0)
+                goto out;
+
         status = nfsd4_unlink_clid_dir(clp->cl_recdir, HEXDIR_LEN-1);
-        nfs4_reset_user(uid, gid);
+        nfs4_reset_creds(original_cred);
         if (status == 0)
                 nfsd4_sync_rec_dir();
         mnt_drop_write(rec_dir.mnt);
@@ -401,16 +414,21 @@ nfsd4_recdir_load(void) {
 void
 nfsd4_init_recdir(char *rec_dirname)
 {
-        uid_t                   uid = 0;
-        gid_t                   gid = 0;
-        int                     status;
+        const struct cred *original_cred;
+        int status;
 
         printk("NFSD: Using %s as the NFSv4 state recovery directory\n",
                         rec_dirname);
 
         BUG_ON(rec_dir_init);
 
-        nfs4_save_user(&uid, &gid);
+        status = nfs4_save_creds(&original_cred);
+        if (status < 0) {
+                printk("NFSD: Unable to change credentials to find recovery"
+                       " directory: error %d\n",
+                       status);
+                return;
+        }
 
         status = kern_path(rec_dirname, LOOKUP_FOLLOW | LOOKUP_DIRECTORY,
                         &rec_dir);
@@ -420,7 +438,7 @@ nfsd4_init_recdir(char *rec_dirname)
 
         if (!status)
                 rec_dir_init = 1;
-        nfs4_reset_user(uid, gid);
+        nfs4_reset_creds(original_cred);
 }
 
 void
diff --git a/fs/nfsd/nfsfh.c b/fs/nfsd/nfsfh.c
index cd25d91895a1..f0da7d9c3a92 100644
--- a/fs/nfsd/nfsfh.c
+++ b/fs/nfsd/nfsfh.c
@@ -186,9 +186,14 @@ static __be32 nfsd_set_fh_dentry(struct svc_rqst *rqstp, struct svc_fh *fhp)
                  * access control settings being in effect, we cannot
                  * fix that case easily.
                  */
-                current->cap_effective =
-                        cap_raise_nfsd_set(current->cap_effective,
-                                           current->cap_permitted);
+                struct cred *new = prepare_creds();
+                if (!new)
+                        return nfserrno(-ENOMEM);
+                new->cap_effective =
+                        cap_raise_nfsd_set(new->cap_effective,
+                                           new->cap_permitted);
+                put_cred(override_creds(new));
+                put_cred(new);
         } else {
                 error = nfsd_setuser_and_check_port(rqstp, exp);
                 if (error)
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index 4433c8f00163..d1c5f787b365 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -671,6 +671,7 @@ __be32
 nfsd_open(struct svc_rqst *rqstp, struct svc_fh *fhp, int type,
                         int access, struct file **filp)
 {
+        const struct cred *cred = current_cred();
         struct dentry   *dentry;
         struct inode    *inode;
         int             flags = O_RDONLY|O_LARGEFILE;
@@ -725,7 +726,7 @@ nfsd_open(struct svc_rqst *rqstp, struct svc_fh *fhp, int type,
                 DQUOT_INIT(inode);
         }
         *filp = dentry_open(dget(dentry), mntget(fhp->fh_export->ex_path.mnt),
-                                flags);
+                            flags, cred);
         if (IS_ERR(*filp))
                 host_err = PTR_ERR(*filp);
 out_nfserr:
@@ -1169,7 +1170,7 @@ nfsd_create_setattr(struct svc_rqst *rqstp, struct svc_fh *resfhp,
          * send along the gid on create when it tries to implement
          * setgid directories via NFS:
          */
-        if (current->fsuid != 0)
+        if (current_fsuid() != 0)
                 iap->ia_valid &= ~(ATTR_UID|ATTR_GID);
         if (iap->ia_valid)
                 return nfsd_setattr(rqstp, resfhp, iap, 0, (time_t)0);
@@ -2001,7 +2002,7 @@ nfsd_permission(struct svc_rqst *rqstp, struct svc_export *exp,
                 IS_APPEND(inode)?       " append" : "",
                 __mnt_is_readonly(exp->ex_path.mnt)?    " ro" : "");
         dprintk("      owner %d/%d user %d/%d\n",
-                inode->i_uid, inode->i_gid, current->fsuid, current->fsgid);
+                inode->i_uid, inode->i_gid, current_fsuid(), current_fsgid());
 #endif
 
         /* Normally we reject any write/sattr etc access on a read-only file
@@ -2044,7 +2045,7 @@ nfsd_permission(struct svc_rqst *rqstp, struct svc_export *exp,
          * with NFSv3.
          */
         if ((acc & NFSD_MAY_OWNER_OVERRIDE) &&
-            inode->i_uid == current->fsuid)
+            inode->i_uid == current_fsuid())
                 return 0;
 
         /* This assumes  NFSD_MAY_{READ,WRITE,EXEC} == MAY_{READ,WRITE,EXEC} */
diff --git a/fs/ocfs2/dlm/dlmfs.c b/fs/ocfs2/dlm/dlmfs.c
index ba962d71b34d..6f7a77d54020 100644
--- a/fs/ocfs2/dlm/dlmfs.c
+++ b/fs/ocfs2/dlm/dlmfs.c
@@ -339,8 +339,8 @@ static struct inode *dlmfs_get_root_inode(struct super_block *sb)
                 ip = DLMFS_I(inode);
 
                 inode->i_mode = mode;
-                inode->i_uid = current->fsuid;
-                inode->i_gid = current->fsgid;
+                inode->i_uid = current_fsuid();
+                inode->i_gid = current_fsgid();
                 inode->i_blocks = 0;
                 inode->i_mapping->backing_dev_info = &dlmfs_backing_dev_info;
                 inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
@@ -365,8 +365,8 @@ static struct inode *dlmfs_get_inode(struct inode *parent,
                 return NULL;
 
         inode->i_mode = mode;
-        inode->i_uid = current->fsuid;
-        inode->i_gid = current->fsgid;
+        inode->i_uid = current_fsuid();
+        inode->i_gid = current_fsgid();
         inode->i_blocks = 0;
         inode->i_mapping->backing_dev_info = &dlmfs_backing_dev_info;
         inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
diff --git a/fs/ocfs2/namei.c b/fs/ocfs2/namei.c
index f4967e634ffd..2545e7402efe 100644
--- a/fs/ocfs2/namei.c
+++ b/fs/ocfs2/namei.c
@@ -421,13 +421,13 @@ static int ocfs2_mknod_locked(struct ocfs2_super *osb,
         fe->i_blkno = cpu_to_le64(fe_blkno);
         fe->i_suballoc_bit = cpu_to_le16(suballoc_bit);
         fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot);
-        fe->i_uid = cpu_to_le32(current->fsuid);
+        fe->i_uid = cpu_to_le32(current_fsuid());
         if (dir->i_mode & S_ISGID) {
                 fe->i_gid = cpu_to_le32(dir->i_gid);
                 if (S_ISDIR(mode))
                         mode |= S_ISGID;
         } else
-                fe->i_gid = cpu_to_le32(current->fsgid);
+                fe->i_gid = cpu_to_le32(current_fsgid());
         fe->i_mode = cpu_to_le16(mode);
         if (S_ISCHR(mode) || S_ISBLK(mode))
                 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev));
diff --git a/fs/omfs/inode.c b/fs/omfs/inode.c
index cbf047a847c5..6afe57c84f84 100644
--- a/fs/omfs/inode.c
+++ b/fs/omfs/inode.c
@@ -37,8 +37,8 @@ struct inode *omfs_new_inode(struct inode *dir, int mode)
 
         inode->i_ino = new_block;
         inode->i_mode = mode;
-        inode->i_uid = current->fsuid;
-        inode->i_gid = current->fsgid;
+        inode->i_uid = current_fsuid();
+        inode->i_gid = current_fsgid();
         inode->i_blocks = 0;
         inode->i_mapping->a_ops = &omfs_aops;
 
@@ -420,8 +420,8 @@ static int omfs_fill_super(struct super_block *sb, void *data, int silent)
 
         sb->s_fs_info = sbi;
 
-        sbi->s_uid = current->uid;
-        sbi->s_gid = current->gid;
+        sbi->s_uid = current_uid();
+        sbi->s_gid = current_gid();
         sbi->s_dmask = sbi->s_fmask = current->fs->umask;
 
         if (!parse_options((char *) data, sbi))
diff --git a/fs/open.c b/fs/open.c
index 83cdb9dee0c1..c0a426d5766c 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -425,39 +425,33 @@ out:
  */
 asmlinkage long sys_faccessat(int dfd, const char __user *filename, int mode)
 {
+        const struct cred *old_cred;
+        struct cred *override_cred;
         struct path path;
         struct inode *inode;
-        int old_fsuid, old_fsgid;
-        kernel_cap_t uninitialized_var(old_cap);  /* !SECURE_NO_SETUID_FIXUP */
         int res;
 
         if (mode & ~S_IRWXO)    /* where's F_OK, X_OK, W_OK, R_OK? */
                 return -EINVAL;
 
-        old_fsuid = current->fsuid;
-        old_fsgid = current->fsgid;
+        override_cred = prepare_creds();
+        if (!override_cred)
+                return -ENOMEM;
 
-        current->fsuid = current->uid;
-        current->fsgid = current->gid;
+        override_cred->fsuid = override_cred->uid;
+        override_cred->fsgid = override_cred->gid;
 
         if (!issecure(SECURE_NO_SETUID_FIXUP)) {
-                /*
-                 * Clear the capabilities if we switch to a non-root user
-                 */
-#ifndef CONFIG_SECURITY_FILE_CAPABILITIES
-                /*
-                 * FIXME: There is a race here against sys_capset.  The
-                 * capabilities can change yet we will restore the old
-                 * value below.  We should hold task_capabilities_lock,
-                 * but we cannot because user_path_at can sleep.
-                 */
-#endif /* ndef CONFIG_SECURITY_FILE_CAPABILITIES */
-                if (current->uid)
-                        old_cap = cap_set_effective(__cap_empty_set);
+                /* Clear the capabilities if we switch to a non-root user */
+                if (override_cred->uid)
+                        cap_clear(override_cred->cap_effective);
                 else
-                        old_cap = cap_set_effective(current->cap_permitted);
+                        override_cred->cap_effective =
+                                override_cred->cap_permitted;
         }
 
+        old_cred = override_creds(override_cred);
+
         res = user_path_at(dfd, filename, LOOKUP_FOLLOW, &path);
         if (res)
                 goto out;
@@ -494,12 +488,8 @@ asmlinkage long sys_faccessat(int dfd, const char __user *filename, int mode)
 out_path_release:
         path_put(&path);
 out:
-        current->fsuid = old_fsuid;
-        current->fsgid = old_fsgid;
-
-        if (!issecure(SECURE_NO_SETUID_FIXUP))
-                cap_set_effective(old_cap);
-
+        revert_creds(old_cred);
+        put_cred(override_cred);
         return res;
 }
 
@@ -792,7 +782,8 @@ static inline int __get_file_write_access(struct inode *inode,
 
 static struct file *__dentry_open(struct dentry *dentry, struct vfsmount *mnt,
                                         int flags, struct file *f,
-                                        int (*open)(struct inode *, struct file *))
+                                        int (*open)(struct inode *, struct file *),
+                                        const struct cred *cred)
 {
         struct inode *inode;
         int error;
@@ -816,7 +807,7 @@ static struct file *__dentry_open(struct dentry *dentry, struct vfsmount *mnt,
         f->f_op = fops_get(inode->i_fop);
         file_move(f, &inode->i_sb->s_files);
 
-        error = security_dentry_open(f);
+        error = security_dentry_open(f, cred);
         if (error)
                 goto cleanup_all;
 
@@ -891,6 +882,8 @@ cleanup_file:
 struct file *lookup_instantiate_filp(struct nameidata *nd, struct dentry *dentry,
                 int (*open)(struct inode *, struct file *))
 {
+        const struct cred *cred = current_cred();
+
         if (IS_ERR(nd->intent.open.file))
                 goto out;
         if (IS_ERR(dentry))
@@ -898,7 +891,7 @@ struct file *lookup_instantiate_filp(struct nameidata *nd, struct dentry *dentry
         nd->intent.open.file = __dentry_open(dget(dentry), mntget(nd->path.mnt),
                                              nd->intent.open.flags - 1,
                                              nd->intent.open.file,
-                                             open);
+                                             open, cred);
 out:
         return nd->intent.open.file;
 out_err:
@@ -917,6 +910,7 @@ EXPORT_SYMBOL_GPL(lookup_instantiate_filp);
  */
 struct file *nameidata_to_filp(struct nameidata *nd, int flags)
 {
+        const struct cred *cred = current_cred();
         struct file *filp;
 
         /* Pick up the filp from the open intent */
@@ -924,7 +918,7 @@ struct file *nameidata_to_filp(struct nameidata *nd, int flags)
         /* Has the filesystem initialised the file for us? */
         if (filp->f_path.dentry == NULL)
                 filp = __dentry_open(nd->path.dentry, nd->path.mnt, flags, filp,
-                                     NULL);
+                                     NULL, cred);
         else
                 path_put(&nd->path);
         return filp;
@@ -934,7 +928,8 @@ struct file *nameidata_to_filp(struct nameidata *nd, int flags)
  * dentry_open() will have done dput(dentry) and mntput(mnt) if it returns an
  * error.
  */
-struct file *dentry_open(struct dentry *dentry, struct vfsmount *mnt, int flags)
+struct file *dentry_open(struct dentry *dentry, struct vfsmount *mnt, int flags,
+                         const struct cred *cred)
 {
         int error;
         struct file *f;
@@ -959,7 +954,7 @@ struct file *dentry_open(struct dentry *dentry, struct vfsmount *mnt, int flags)
                 return ERR_PTR(error);
         }
 
-        return __dentry_open(dentry, mnt, flags, f, NULL);
+        return __dentry_open(dentry, mnt, flags, f, NULL, cred);
 }
 EXPORT_SYMBOL(dentry_open);
 
diff --git a/fs/pipe.c b/fs/pipe.c
index 7aea8b89baac..aaf797bd57b9 100644
--- a/fs/pipe.c
+++ b/fs/pipe.c
@@ -899,8 +899,8 @@ static struct inode * get_pipe_inode(void)
          */
         inode->i_state = I_DIRTY;
         inode->i_mode = S_IFIFO | S_IRUSR | S_IWUSR;
-        inode->i_uid = current->fsuid;
-        inode->i_gid = current->fsgid;
+        inode->i_uid = current_fsuid();
+        inode->i_gid = current_fsgid();
         inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
 
         return inode;
diff --git a/fs/posix_acl.c b/fs/posix_acl.c
index aec931e09973..39df95a0ec25 100644
--- a/fs/posix_acl.c
+++ b/fs/posix_acl.c
@@ -217,11 +217,11 @@ posix_acl_permission(struct inode *inode, const struct posix_acl *acl, int want)
                 switch(pa->e_tag) {
                         case ACL_USER_OBJ:
                                 /* (May have been checked already) */
-                                if (inode->i_uid == current->fsuid)
+                                if (inode->i_uid == current_fsuid())
                                         goto check_perm;
                                 break;
                         case ACL_USER:
-                                if (pa->e_id == current->fsuid)
+                                if (pa->e_id == current_fsuid())
                                         goto mask;
                                 break;
                         case ACL_GROUP_OBJ:
diff --git a/fs/proc/array.c b/fs/proc/array.c
index 6af7fba7abb1..7e4877d9dcb5 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -159,6 +159,7 @@ static inline void task_state(struct seq_file *m, struct pid_namespace *ns,
         struct group_info *group_info;
         int g;
         struct fdtable *fdt = NULL;
+        const struct cred *cred;
         pid_t ppid, tpid;
 
         rcu_read_lock();
@@ -170,6 +171,7 @@ static inline void task_state(struct seq_file *m, struct pid_namespace *ns,
                 if (tracer)
                         tpid = task_pid_nr_ns(tracer, ns);
         }
+        cred = get_cred((struct cred *) __task_cred(p));
         seq_printf(m,
                 "State:\t%s\n"
                 "Tgid:\t%d\n"
@@ -182,8 +184,8 @@ static inline void task_state(struct seq_file *m, struct pid_namespace *ns,
                 task_tgid_nr_ns(p, ns),
                 pid_nr_ns(pid, ns),
                 ppid, tpid,
-                p->uid, p->euid, p->suid, p->fsuid,
-                p->gid, p->egid, p->sgid, p->fsgid);
+                cred->uid, cred->euid, cred->suid, cred->fsuid,
+                cred->gid, cred->egid, cred->sgid, cred->fsgid);
 
         task_lock(p);
         if (p->files)
@@ -194,13 +196,12 @@ static inline void task_state(struct seq_file *m, struct pid_namespace *ns,
                 fdt ? fdt->max_fds : 0);
         rcu_read_unlock();
 
-        group_info = p->group_info;
-        get_group_info(group_info);
+        group_info = cred->group_info;
         task_unlock(p);
 
         for (g = 0; g < min(group_info->ngroups, NGROUPS_SMALL); g++)
                 seq_printf(m, "%d ", GROUP_AT(group_info, g));
-        put_group_info(group_info);
+        put_cred(cred);
 
         seq_printf(m, "\n");
 }
@@ -262,7 +263,7 @@ static inline void task_sig(struct seq_file *m, struct task_struct *p)
                 blocked = p->blocked;
                 collect_sigign_sigcatch(p, &ignored, &caught);
                 num_threads = atomic_read(&p->signal->count);
-                qsize = atomic_read(&p->user->sigpending);
+                qsize = atomic_read(&__task_cred(p)->user->sigpending);
                 qlim = p->signal->rlim[RLIMIT_SIGPENDING].rlim_cur;
                 unlock_task_sighand(p, &flags);
         }
@@ -293,10 +294,21 @@ static void render_cap_t(struct seq_file *m, const char *header,
 
 static inline void task_cap(struct seq_file *m, struct task_struct *p)
 {
-        render_cap_t(m, "CapInh:\t", &p->cap_inheritable);
-        render_cap_t(m, "CapPrm:\t", &p->cap_permitted);
-        render_cap_t(m, "CapEff:\t", &p->cap_effective);
-        render_cap_t(m, "CapBnd:\t", &p->cap_bset);
+        const struct cred *cred;
+        kernel_cap_t cap_inheritable, cap_permitted, cap_effective, cap_bset;
+
+        rcu_read_lock();
+        cred = __task_cred(p);
+        cap_inheritable = cred->cap_inheritable;
+        cap_permitted   = cred->cap_permitted;
+        cap_effective   = cred->cap_effective;
+        cap_bset        = cred->cap_bset;
+        rcu_read_unlock();
+
+        render_cap_t(m, "CapInh:\t", &cap_inheritable);
+        render_cap_t(m, "CapPrm:\t", &cap_permitted);
+        render_cap_t(m, "CapEff:\t", &cap_effective);
+        render_cap_t(m, "CapBnd:\t", &cap_bset);
 }
 
 static inline void task_context_switch_counts(struct seq_file *m,
diff --git a/fs/proc/base.c b/fs/proc/base.c
index d4677603c889..0a8a5f880349 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -1406,6 +1406,7 @@ static struct inode *proc_pid_make_inode(struct super_block * sb, struct task_st
 {
         struct inode * inode;
         struct proc_inode *ei;
+        const struct cred *cred;
 
         /* We need a new inode */
 
@@ -1428,8 +1429,11 @@ static struct inode *proc_pid_make_inode(struct super_block * sb, struct task_st
         inode->i_uid = 0;
         inode->i_gid = 0;
         if (task_dumpable(task)) {
-                inode->i_uid = task->euid;
-                inode->i_gid = task->egid;
+                rcu_read_lock();
+                cred = __task_cred(task);
+                inode->i_uid = cred->euid;
+                inode->i_gid = cred->egid;
+                rcu_read_unlock();
         }
         security_task_to_inode(task, inode);
 
@@ -1445,6 +1449,8 @@ static int pid_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat
 {
         struct inode *inode = dentry->d_inode;
         struct task_struct *task;
+        const struct cred *cred;
+
         generic_fillattr(inode, stat);
 
         rcu_read_lock();
@@ -1454,8 +1460,9 @@ static int pid_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat
         if (task) {
                 if ((inode->i_mode == (S_IFDIR|S_IRUGO|S_IXUGO)) ||
                     task_dumpable(task)) {
-                        stat->uid = task->euid;
-                        stat->gid = task->egid;
+                        cred = __task_cred(task);
+                        stat->uid = cred->euid;
+                        stat->gid = cred->egid;
                 }
         }
         rcu_read_unlock();
@@ -1483,11 +1490,16 @@ static int pid_revalidate(struct dentry *dentry, struct nameidata *nd)
 {
         struct inode *inode = dentry->d_inode;
         struct task_struct *task = get_proc_task(inode);
+        const struct cred *cred;
+
         if (task) {
                 if ((inode->i_mode == (S_IFDIR|S_IRUGO|S_IXUGO)) ||
                     task_dumpable(task)) {
-                        inode->i_uid = task->euid;
-                        inode->i_gid = task->egid;
+                        rcu_read_lock();
+                        cred = __task_cred(task);
+                        inode->i_uid = cred->euid;
+                        inode->i_gid = cred->egid;
+                        rcu_read_unlock();
                 } else {
                         inode->i_uid = 0;
                         inode->i_gid = 0;
@@ -1649,6 +1661,7 @@ static int tid_fd_revalidate(struct dentry *dentry, struct nameidata *nd)
         struct task_struct *task = get_proc_task(inode);
         int fd = proc_fd(inode);
         struct files_struct *files;
+        const struct cred *cred;
 
         if (task) {
                 files = get_files_struct(task);
@@ -1658,8 +1671,11 @@ static int tid_fd_revalidate(struct dentry *dentry, struct nameidata *nd)
                                 rcu_read_unlock();
                                 put_files_struct(files);
                                 if (task_dumpable(task)) {
-                                        inode->i_uid = task->euid;
-                                        inode->i_gid = task->egid;
+                                        rcu_read_lock();
+                                        cred = __task_cred(task);
+                                        inode->i_uid = cred->euid;
+                                        inode->i_gid = cred->egid;
+                                        rcu_read_unlock();
                                 } else {
                                         inode->i_uid = 0;
                                         inode->i_gid = 0;
diff --git a/fs/quota.c b/fs/quota.c
index 7f4386ebc23a..b7fe44e01618 100644
--- a/fs/quota.c
+++ b/fs/quota.c
@@ -79,7 +79,7 @@ static int generic_quotactl_valid(struct super_block *sb, int type, int cmd, qid
 
         /* Check privileges */
         if (cmd == Q_GETQUOTA) {
-                if (((type == USRQUOTA && current->euid != id) ||
+                if (((type == USRQUOTA && current_euid() != id) ||
                      (type == GRPQUOTA && !in_egroup_p(id))) &&
                     !capable(CAP_SYS_ADMIN))
                         return -EPERM;
@@ -130,7 +130,7 @@ static int xqm_quotactl_valid(struct super_block *sb, int type, int cmd, qid_t i
 
         /* Check privileges */
         if (cmd == Q_XGETQUOTA) {
-                if (((type == XQM_USRQUOTA && current->euid != id) ||
+                if (((type == XQM_USRQUOTA && current_euid() != id) ||
                      (type == XQM_GRPQUOTA && !in_egroup_p(id))) &&
                      !capable(CAP_SYS_ADMIN))
                         return -EPERM;
diff --git a/fs/ramfs/inode.c b/fs/ramfs/inode.c
index f031d1c925f0..a83a3518ae33 100644
--- a/fs/ramfs/inode.c
+++ b/fs/ramfs/inode.c
@@ -55,8 +55,8 @@ struct inode *ramfs_get_inode(struct super_block *sb, int mode, dev_t dev)
 
         if (inode) {
                 inode->i_mode = mode;
-                inode->i_uid = current->fsuid;
-                inode->i_gid = current->fsgid;
+                inode->i_uid = current_fsuid();
+                inode->i_gid = current_fsgid();
                 inode->i_blocks = 0;
                 inode->i_mapping->a_ops = &ramfs_aops;
                 inode->i_mapping->backing_dev_info = &ramfs_backing_dev_info;
diff --git a/fs/reiserfs/namei.c b/fs/reiserfs/namei.c
index f89ebb943f3f..4f322e5ed840 100644
--- a/fs/reiserfs/namei.c
+++ b/fs/reiserfs/namei.c
@@ -573,7 +573,7 @@ static int new_inode_init(struct inode *inode, struct inode *dir, int mode)
         /* the quota init calls have to know who to charge the quota to, so
          ** we have to set uid and gid here
          */
-        inode->i_uid = current->fsuid;
+        inode->i_uid = current_fsuid();
         inode->i_mode = mode;
         /* Make inode invalid - just in case we are going to drop it before
          * the initialization happens */
@@ -584,7 +584,7 @@ static int new_inode_init(struct inode *inode, struct inode *dir, int mode)
                 if (S_ISDIR(mode))
                         inode->i_mode |= S_ISGID;
         } else {
-                inode->i_gid = current->fsgid;
+                inode->i_gid = current_fsgid();
         }
         DQUOT_INIT(inode);
         return 0;
diff --git a/fs/smbfs/dir.c b/fs/smbfs/dir.c
index 48da4fa6b7d4..e7ddd0328ddc 100644
--- a/fs/smbfs/dir.c
+++ b/fs/smbfs/dir.c
@@ -667,8 +667,7 @@ smb_make_node(struct inode *dir, struct dentry *dentry, int mode, dev_t dev)
 
         attr.ia_valid = ATTR_MODE | ATTR_UID | ATTR_GID;
         attr.ia_mode = mode;
-        attr.ia_uid = current->euid;
-        attr.ia_gid = current->egid;
+        current_euid_egid(&attr.ia_uid, &attr.ia_gid);
 
         if (!new_valid_dev(dev))
                 return -EINVAL;
diff --git a/fs/smbfs/inode.c b/fs/smbfs/inode.c
index 3528f40ffb0f..fc27fbfc5397 100644
--- a/fs/smbfs/inode.c
+++ b/fs/smbfs/inode.c
@@ -586,7 +586,7 @@ static int smb_fill_super(struct super_block *sb, void *raw_data, int silent)
                 if (parse_options(mnt, raw_data))
                         goto out_bad_option;
         }
-        mnt->mounted_uid = current->uid;
+        mnt->mounted_uid = current_uid();
         smb_setcodepage(server, &mnt->codepage);
 
         /*
diff --git a/fs/smbfs/proc.c b/fs/smbfs/proc.c
index ee536e8a649a..9468168b9af5 100644
--- a/fs/smbfs/proc.c
+++ b/fs/smbfs/proc.c
@@ -864,7 +864,7 @@ smb_newconn(struct smb_sb_info *server, struct smb_conn_opt *opt)
                 goto out;
 
         error = -EACCES;
-        if (current->uid != server->mnt->mounted_uid && 
+        if (current_uid() != server->mnt->mounted_uid &&
             !capable(CAP_SYS_ADMIN))
                 goto out;
 
diff --git a/fs/super.c b/fs/super.c
index 400a7608f15e..ddba069d7a99 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -914,7 +914,7 @@ vfs_kern_mount(struct file_system_type *type, int flags, const char *name, void
                 goto out_free_secdata;
         BUG_ON(!mnt->mnt_sb);
 
-        error = security_sb_kern_mount(mnt->mnt_sb, secdata);
+        error = security_sb_kern_mount(mnt->mnt_sb, flags, secdata);
         if (error)
                 goto out_sb;
 
diff --git a/fs/sysv/ialloc.c b/fs/sysv/ialloc.c
index 115ab0d6f4bc..241e9765cfad 100644
--- a/fs/sysv/ialloc.c
+++ b/fs/sysv/ialloc.c
@@ -165,9 +165,9 @@ struct inode * sysv_new_inode(const struct inode * dir, mode_t mode)
                 if (S_ISDIR(mode))
                         mode |= S_ISGID;
         } else
-                inode->i_gid = current->fsgid;
+                inode->i_gid = current_fsgid();
 
-        inode->i_uid = current->fsuid;
+        inode->i_uid = current_fsuid();
         inode->i_ino = fs16_to_cpu(sbi, ino);
         inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
         inode->i_blocks = 0;
diff --git a/fs/ubifs/budget.c b/fs/ubifs/budget.c
index 1a4973e10664..4a18f084cc42 100644
--- a/fs/ubifs/budget.c
+++ b/fs/ubifs/budget.c
@@ -363,7 +363,7 @@ long long ubifs_calc_available(const struct ubifs_info *c, int min_idx_lebs)
  */
 static int can_use_rp(struct ubifs_info *c)
 {
-        if (current->fsuid == c->rp_uid || capable(CAP_SYS_RESOURCE) ||
+        if (current_fsuid() == c->rp_uid || capable(CAP_SYS_RESOURCE) ||
             (c->rp_gid != 0 && in_group_p(c->rp_gid)))
                 return 1;
         return 0;
diff --git a/fs/ubifs/dir.c b/fs/ubifs/dir.c
index 0422c98e1793..f448ab1f9c38 100644
--- a/fs/ubifs/dir.c
+++ b/fs/ubifs/dir.c
@@ -104,13 +104,13 @@ struct inode *ubifs_new_inode(struct ubifs_info *c, const struct inode *dir,
          */
         inode->i_flags |= (S_NOCMTIME);
 
-        inode->i_uid = current->fsuid;
+        inode->i_uid = current_fsuid();
         if (dir->i_mode & S_ISGID) {
                 inode->i_gid = dir->i_gid;
                 if (S_ISDIR(mode))
                         mode |= S_ISGID;
         } else
-                inode->i_gid = current->fsgid;
+                inode->i_gid = current_fsgid();
         inode->i_mode = mode;
         inode->i_mtime = inode->i_atime = inode->i_ctime =
                          ubifs_current_time(inode);
diff --git a/fs/udf/ialloc.c b/fs/udf/ialloc.c
index a4f2b3ce45b0..31fc84297ddb 100644
--- a/fs/udf/ialloc.c
+++ b/fs/udf/ialloc.c
@@ -126,13 +126,13 @@ struct inode *udf_new_inode(struct inode *dir, int mode, int *err)
         }
         mutex_unlock(&sbi->s_alloc_mutex);
         inode->i_mode = mode;
-        inode->i_uid = current->fsuid;
+        inode->i_uid = current_fsuid();
         if (dir->i_mode & S_ISGID) {
                 inode->i_gid = dir->i_gid;
                 if (S_ISDIR(mode))
                         mode |= S_ISGID;
         } else {
-                inode->i_gid = current->fsgid;
+                inode->i_gid = current_fsgid();
         }
 
         iinfo->i_location.logicalBlockNum = block;
diff --git a/fs/udf/namei.c b/fs/udf/namei.c
index 082409cd4b8a..f84bfaa8d941 100644
--- a/fs/udf/namei.c
+++ b/fs/udf/namei.c
@@ -604,7 +604,7 @@ static int udf_mknod(struct inode *dir, struct dentry *dentry, int mode,
                 goto out;
 
         iinfo = UDF_I(inode);
-        inode->i_uid = current->fsuid;
+        inode->i_uid = current_fsuid();
         init_special_inode(inode, mode, rdev);
         fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
         if (!fi) {
diff --git a/fs/ufs/ialloc.c b/fs/ufs/ialloc.c
index ac181f6806a3..6f5dcf006096 100644
--- a/fs/ufs/ialloc.c
+++ b/fs/ufs/ialloc.c
@@ -304,13 +304,13 @@ cg_found:
 
         inode->i_ino = cg * uspi->s_ipg + bit;
         inode->i_mode = mode;
-        inode->i_uid = current->fsuid;
+        inode->i_uid = current_fsuid();
         if (dir->i_mode & S_ISGID) {
                 inode->i_gid = dir->i_gid;
                 if (S_ISDIR(mode))
                         inode->i_mode |= S_ISGID;
         } else
-                inode->i_gid = current->fsgid;
+                inode->i_gid = current_fsgid();
 
         inode->i_blocks = 0;
         inode->i_generation = 0;
diff --git a/fs/xfs/linux-2.6/xfs_cred.h b/fs/xfs/linux-2.6/xfs_cred.h
index 652721ce0ea5..8c022cd0ad67 100644
--- a/fs/xfs/linux-2.6/xfs_cred.h
+++ b/fs/xfs/linux-2.6/xfs_cred.h
@@ -23,11 +23,9 @@
 /*
  * Credentials
  */
-typedef struct cred {
-        /* EMPTY */
-} cred_t;
+typedef const struct cred cred_t;
 
-extern struct cred *sys_cred;
+extern cred_t *sys_cred;
 
 /* this is a hack.. (assumes sys_cred is the only cred_t in the system) */
 static inline int capable_cred(cred_t *cr, int cid)
diff --git a/fs/xfs/linux-2.6/xfs_globals.h b/fs/xfs/linux-2.6/xfs_globals.h
index 2770b0085ee8..6eda8a3eb6f1 100644
--- a/fs/xfs/linux-2.6/xfs_globals.h
+++ b/fs/xfs/linux-2.6/xfs_globals.h
@@ -19,6 +19,6 @@
 #define __XFS_GLOBALS_H__
 
 extern uint64_t xfs_panic_mask;         /* set to cause more panics */
-extern struct cred *sys_cred;
+extern cred_t *sys_cred;
 
 #endif  /* __XFS_GLOBALS_H__ */
diff --git a/fs/xfs/linux-2.6/xfs_ioctl.c b/fs/xfs/linux-2.6/xfs_ioctl.c
index d3438c72dcaf..281cbd5a25cf 100644
--- a/fs/xfs/linux-2.6/xfs_ioctl.c
+++ b/fs/xfs/linux-2.6/xfs_ioctl.c
@@ -256,6 +256,7 @@ xfs_open_by_handle(
         struct file             *parfilp,
         struct inode            *parinode)
 {
+        const struct cred       *cred = current_cred();
         int                     error;
         int                     new_fd;
         int                     permflag;
@@ -321,7 +322,7 @@ xfs_open_by_handle(
         mntget(parfilp->f_path.mnt);
 
         /* Create file pointer. */
-        filp = dentry_open(dentry, parfilp->f_path.mnt, hreq.oflags);
+        filp = dentry_open(dentry, parfilp->f_path.mnt, hreq.oflags, cred);
         if (IS_ERR(filp)) {
                 put_unused_fd(new_fd);
                 return -XFS_ERROR(-PTR_ERR(filp));
@@ -1007,7 +1008,7 @@ xfs_ioctl_setattr(
          * to the file owner ID, except in cases where the
          * CAP_FSETID capability is applicable.
          */
-        if (current->fsuid != ip->i_d.di_uid && !capable(CAP_FOWNER)) {
+        if (current_fsuid() != ip->i_d.di_uid && !capable(CAP_FOWNER)) {
                 code = XFS_ERROR(EPERM);
                 goto error_return;
         }
diff --git a/fs/xfs/xfs_acl.c b/fs/xfs/xfs_acl.c
index b2f639a1416f..91d69338d3b2 100644
--- a/fs/xfs/xfs_acl.c
+++ b/fs/xfs/xfs_acl.c
@@ -366,7 +366,7 @@ xfs_acl_allow_set(
                 return ENOTDIR;
         if (vp->i_sb->s_flags & MS_RDONLY)
                 return EROFS;
-        if (XFS_I(vp)->i_d.di_uid != current->fsuid && !capable(CAP_FOWNER))
+        if (XFS_I(vp)->i_d.di_uid != current_fsuid() && !capable(CAP_FOWNER))
                 return EPERM;
         return 0;
 }
@@ -413,13 +413,13 @@ xfs_acl_access(
                 switch (fap->acl_entry[i].ae_tag) {
                 case ACL_USER_OBJ:
                         seen_userobj = 1;
-                        if (fuid != current->fsuid)
+                        if (fuid != current_fsuid())
                                 continue;
                         matched.ae_tag = ACL_USER_OBJ;
                         matched.ae_perm = allows;
                         break;
                 case ACL_USER:
-                        if (fap->acl_entry[i].ae_id != current->fsuid)
+                        if (fap->acl_entry[i].ae_id != current_fsuid())
                                 continue;
                         matched.ae_tag = ACL_USER;
                         matched.ae_perm = allows;
diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h
index 1420c49674d7..6be310d41daf 100644
--- a/fs/xfs/xfs_inode.h
+++ b/fs/xfs/xfs_inode.h
@@ -497,7 +497,7 @@ int		xfs_iread(struct xfs_mount *, struct xfs_trans *, xfs_ino_t,
                           xfs_inode_t **, xfs_daddr_t, uint);
 int             xfs_iread_extents(struct xfs_trans *, xfs_inode_t *, int);
 int             xfs_ialloc(struct xfs_trans *, xfs_inode_t *, mode_t,
-                           xfs_nlink_t, xfs_dev_t, struct cred *, xfs_prid_t,
+                           xfs_nlink_t, xfs_dev_t, cred_t *, xfs_prid_t,
                            int, struct xfs_buf **, boolean_t *, xfs_inode_t **);
 void            xfs_dinode_from_disk(struct xfs_icdinode *,
                                      struct xfs_dinode_core *);
diff --git a/fs/xfs/xfs_vnodeops.h b/fs/xfs/xfs_vnodeops.h
index e932a96bec54..7b0c2ab88333 100644
--- a/fs/xfs/xfs_vnodeops.h
+++ b/fs/xfs/xfs_vnodeops.h
@@ -16,7 +16,7 @@ struct xfs_iomap;
 
 int xfs_open(struct xfs_inode *ip);
 int xfs_setattr(struct xfs_inode *ip, struct iattr *vap, int flags,
-                struct cred *credp);
+                cred_t *credp);
 #define XFS_ATTR_DMI            0x01    /* invocation from a DMI function */
 #define XFS_ATTR_NONBLOCK       0x02    /* return EAGAIN if operation would block */
 #define XFS_ATTR_NOLOCK         0x04    /* Don't grab any conflicting locks */
@@ -28,24 +28,24 @@ int xfs_inactive(struct xfs_inode *ip);
 int xfs_lookup(struct xfs_inode *dp, struct xfs_name *name,
                 struct xfs_inode **ipp, struct xfs_name *ci_name);
 int xfs_create(struct xfs_inode *dp, struct xfs_name *name, mode_t mode,
-                xfs_dev_t rdev, struct xfs_inode **ipp, struct cred *credp);
+                xfs_dev_t rdev, struct xfs_inode **ipp, cred_t *credp);
 int xfs_remove(struct xfs_inode *dp, struct xfs_name *name,
                 struct xfs_inode *ip);
 int xfs_link(struct xfs_inode *tdp, struct xfs_inode *sip,
                 struct xfs_name *target_name);
 int xfs_mkdir(struct xfs_inode *dp, struct xfs_name *dir_name,
-                mode_t mode, struct xfs_inode **ipp, struct cred *credp);
+                mode_t mode, struct xfs_inode **ipp, cred_t *credp);
 int xfs_readdir(struct xfs_inode        *dp, void *dirent, size_t bufsize,
                        xfs_off_t *offset, filldir_t filldir);
 int xfs_symlink(struct xfs_inode *dp, struct xfs_name *link_name,
                 const char *target_path, mode_t mode, struct xfs_inode **ipp,
-                struct cred *credp);
+                cred_t *credp);
 int xfs_inode_flush(struct xfs_inode *ip, int flags);
 int xfs_set_dmattrs(struct xfs_inode *ip, u_int evmask, u_int16_t state);
 int xfs_reclaim(struct xfs_inode *ip);
 int xfs_change_file_space(struct xfs_inode *ip, int cmd,
                 xfs_flock64_t *bf, xfs_off_t offset,
-                struct cred *credp, int attr_flags);
+                cred_t *credp, int      attr_flags);
 int xfs_rename(struct xfs_inode *src_dp, struct xfs_name *src_name,
                 struct xfs_inode *src_ip, struct xfs_inode *target_dp,
                 struct xfs_name *target_name, struct xfs_inode *target_ip);
diff --git a/include/keys/keyring-type.h b/include/keys/keyring-type.h
new file mode 100644
index 000000000000..843f872a4b63
--- /dev/null
+++ b/include/keys/keyring-type.h
@@ -0,0 +1,31 @@
+/* Keyring key type
+ *
+ * Copyright (C) 2008 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#ifndef _KEYS_KEYRING_TYPE_H
+#define _KEYS_KEYRING_TYPE_H
+
+#include <linux/key.h>
+#include <linux/rcupdate.h>
+
+/*
+ * the keyring payload contains a list of the keys to which the keyring is
+ * subscribed
+ */
+struct keyring_list {
+        struct rcu_head rcu;            /* RCU deletion hook */
+        unsigned short  maxkeys;        /* max keys this list can hold */
+        unsigned short  nkeys;          /* number of keys currently held */
+        unsigned short  delkey;         /* key to be unlinked by RCU */
+        struct key      *keys[0];
+};
+
+
+#endif /* _KEYS_KEYRING_TYPE_H */
diff --git a/include/linux/audit.h b/include/linux/audit.h
index 8f0672d13eb1..26c4f6f65a46 100644
--- a/include/linux/audit.h
+++ b/include/linux/audit.h
@@ -99,6 +99,8 @@
 #define AUDIT_OBJ_PID           1318    /* ptrace target */
 #define AUDIT_TTY               1319    /* Input on an administrative TTY */
 #define AUDIT_EOE               1320    /* End of multi-record event */
+#define AUDIT_BPRM_FCAPS        1321    /* Information about fcaps increasing perms */
+#define AUDIT_CAPSET            1322    /* Record showing argument to sys_capset */
 
 #define AUDIT_AVC               1400    /* SE Linux avc denial or grant */
 #define AUDIT_SELINUX_ERR       1401    /* Internal SE Linux Errors */
@@ -453,6 +455,10 @@ extern int __audit_mq_timedsend(mqd_t mqdes, size_t msg_len, unsigned int msg_pr
 extern int __audit_mq_timedreceive(mqd_t mqdes, size_t msg_len, unsigned int __user *u_msg_prio, const struct timespec __user *u_abs_timeout);
 extern int __audit_mq_notify(mqd_t mqdes, const struct sigevent __user *u_notification);
 extern int __audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat);
+extern int __audit_log_bprm_fcaps(struct linux_binprm *bprm,
+                                  const struct cred *new,
+                                  const struct cred *old);
+extern int __audit_log_capset(pid_t pid, const struct cred *new, const struct cred *old);
 
 static inline int audit_ipc_obj(struct kern_ipc_perm *ipcp)
 {
@@ -502,6 +508,24 @@ static inline int audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat)
                 return __audit_mq_getsetattr(mqdes, mqstat);
         return 0;
 }
+
+static inline int audit_log_bprm_fcaps(struct linux_binprm *bprm,
+                                       const struct cred *new,
+                                       const struct cred *old)
+{
+        if (unlikely(!audit_dummy_context()))
+                return __audit_log_bprm_fcaps(bprm, new, old);
+        return 0;
+}
+
+static inline int audit_log_capset(pid_t pid, const struct cred *new,
+                                   const struct cred *old)
+{
+        if (unlikely(!audit_dummy_context()))
+                return __audit_log_capset(pid, new, old);
+        return 0;
+}
+
 extern int audit_n_rules;
 extern int audit_signals;
 #else
@@ -534,6 +558,8 @@ extern int audit_signals;
 #define audit_mq_timedreceive(d,l,p,t) ({ 0; })
 #define audit_mq_notify(d,n) ({ 0; })
 #define audit_mq_getsetattr(d,s) ({ 0; })
+#define audit_log_bprm_fcaps(b, ncr, ocr) ({ 0; })
+#define audit_log_capset(pid, ncr, ocr) ({ 0; })
 #define audit_ptrace(t) ((void)0)
 #define audit_n_rules 0
 #define audit_signals 0
diff --git a/include/linux/binfmts.h b/include/linux/binfmts.h
index 7394b5b349ff..6cbfbe297180 100644
--- a/include/linux/binfmts.h
+++ b/include/linux/binfmts.h
@@ -35,16 +35,20 @@ struct linux_binprm{
         struct mm_struct *mm;
         unsigned long p; /* current top of mem */
         unsigned int sh_bang:1,
-                     misc_bang:1;
+                misc_bang:1,
+                cred_prepared:1,/* true if creds already prepared (multiple
+                                 * preps happen for interpreters) */
+                cap_effective:1;/* true if has elevated effective capabilities,
+                                 * false if not; except for init which inherits
+                                 * its parent's caps anyway */
 #ifdef __alpha__
         unsigned int taso:1;
 #endif
         unsigned int recursion_depth;
         struct file * file;
-        int e_uid, e_gid;
-        kernel_cap_t cap_post_exec_permitted;
-        bool cap_effective;
-        void *security;
+        struct cred *cred;      /* new credentials */
+        int unsafe;             /* how unsafe this exec is (mask of LSM_UNSAFE_*) */
+        unsigned int per_clear; /* bits to clear in current->personality */
         int argc, envc;
         char * filename;        /* Name of binary as seen by procps */
         char * interp;          /* Name of the binary really executed. Most
@@ -101,7 +105,7 @@ extern int setup_arg_pages(struct linux_binprm * bprm,
                            int executable_stack);
 extern int bprm_mm_init(struct linux_binprm *bprm);
 extern int copy_strings_kernel(int argc,char ** argv,struct linux_binprm *bprm);
-extern void compute_creds(struct linux_binprm *binprm);
+extern void install_exec_creds(struct linux_binprm *bprm);
 extern int do_coredump(long signr, int exit_code, struct pt_regs * regs);
 extern int set_binfmt(struct linux_binfmt *new);
 extern void free_bprm(struct linux_binprm *);
diff --git a/include/linux/capability.h b/include/linux/capability.h
index 9d1fe30b6f6c..e22f48c2a46f 100644
--- a/include/linux/capability.h
+++ b/include/linux/capability.h
@@ -53,6 +53,7 @@ typedef struct __user_cap_data_struct {
 #define XATTR_NAME_CAPS XATTR_SECURITY_PREFIX XATTR_CAPS_SUFFIX
 
 #define VFS_CAP_REVISION_MASK   0xFF000000
+#define VFS_CAP_REVISION_SHIFT  24
 #define VFS_CAP_FLAGS_MASK      ~VFS_CAP_REVISION_MASK
 #define VFS_CAP_FLAGS_EFFECTIVE 0x000001
 
@@ -68,6 +69,9 @@ typedef struct __user_cap_data_struct {
 #define VFS_CAP_U32             VFS_CAP_U32_2
 #define VFS_CAP_REVISION        VFS_CAP_REVISION_2
 
+#ifdef CONFIG_SECURITY_FILE_CAPABILITIES
+extern int file_caps_enabled;
+#endif
 
 struct vfs_cap_data {
         __le32 magic_etc;            /* Little endian */
@@ -96,6 +100,13 @@ typedef struct kernel_cap_struct {
         __u32 cap[_KERNEL_CAPABILITY_U32S];
 } kernel_cap_t;
 
+/* exact same as vfs_cap_data but in cpu endian and always filled completely */
+struct cpu_vfs_cap_data {
+        __u32 magic_etc;
+        kernel_cap_t permitted;
+        kernel_cap_t inheritable;
+};
+
 #define _USER_CAP_HEADER_SIZE  (sizeof(struct __user_cap_header_struct))
 #define _KERNEL_CAP_T_SIZE     (sizeof(kernel_cap_t))
 
@@ -454,6 +465,13 @@ static inline int cap_isclear(const kernel_cap_t a)
         return 1;
 }
 
+/*
+ * Check if "a" is a subset of "set".
+ * return 1 if ALL of the capabilities in "a" are also in "set"
+ *      cap_issubset(0101, 1111) will return 1
+ * return 0 if ANY of the capabilities in "a" are not in "set"
+ *      cap_issubset(1111, 0101) will return 0
+ */
 static inline int cap_issubset(const kernel_cap_t a, const kernel_cap_t set)
 {
         kernel_cap_t dest;
@@ -501,8 +519,6 @@ extern const kernel_cap_t __cap_empty_set;
 extern const kernel_cap_t __cap_full_set;
 extern const kernel_cap_t __cap_init_eff_set;
 
-kernel_cap_t cap_set_effective(const kernel_cap_t pE_new);
-
 /**
  * has_capability - Determine if a task has a superior capability available
  * @t: The task in question
@@ -514,9 +530,14 @@ kernel_cap_t cap_set_effective(const kernel_cap_t pE_new);
  * Note that this does not set PF_SUPERPRIV on the task.
  */
 #define has_capability(t, cap) (security_capable((t), (cap)) == 0)
+#define has_capability_noaudit(t, cap) (security_capable_noaudit((t), (cap)) == 0)
 
 extern int capable(int cap);
 
+/* audit system wants to get cap info from files as well */
+struct dentry;
+extern int get_vfs_caps_from_disk(const struct dentry *dentry, struct cpu_vfs_cap_data *cpu_caps);
+
 #endif /* __KERNEL__ */
 
 #endif /* !_LINUX_CAPABILITY_H */
diff --git a/include/linux/cred.h b/include/linux/cred.h
index b69222cc1fd2..3282ee4318e7 100644
--- a/include/linux/cred.h
+++ b/include/linux/cred.h
@@ -1,4 +1,4 @@
-/* Credentials management
+/* Credentials management - see Documentation/credentials.txt
  *
  * Copyright (C) 2008 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
@@ -12,39 +12,335 @@
 #ifndef _LINUX_CRED_H
 #define _LINUX_CRED_H
 
-#define get_current_user()      (get_uid(current->user))
+#include <linux/capability.h>
+#include <linux/key.h>
+#include <asm/atomic.h>
 
-#define task_uid(task)          ((task)->uid)
-#define task_gid(task)          ((task)->gid)
-#define task_euid(task)         ((task)->euid)
-#define task_egid(task)         ((task)->egid)
+struct user_struct;
+struct cred;
+struct inode;
 
-#define current_uid()           (current->uid)
-#define current_gid()           (current->gid)
-#define current_euid()          (current->euid)
-#define current_egid()          (current->egid)
-#define current_suid()          (current->suid)
-#define current_sgid()          (current->sgid)
-#define current_fsuid()         (current->fsuid)
-#define current_fsgid()         (current->fsgid)
-#define current_cap()           (current->cap_effective)
+/*
+ * COW Supplementary groups list
+ */
+#define NGROUPS_SMALL           32
+#define NGROUPS_PER_BLOCK       ((unsigned int)(PAGE_SIZE / sizeof(gid_t)))
+
+struct group_info {
+        atomic_t        usage;
+        int             ngroups;
+        int             nblocks;
+        gid_t           small_block[NGROUPS_SMALL];
+        gid_t           *blocks[0];
+};
+
+/**
+ * get_group_info - Get a reference to a group info structure
+ * @group_info: The group info to reference
+ *
+ * This gets a reference to a set of supplementary groups.
+ *
+ * If the caller is accessing a task's credentials, they must hold the RCU read
+ * lock when reading.
+ */
+static inline struct group_info *get_group_info(struct group_info *gi)
+{
+        atomic_inc(&gi->usage);
+        return gi;
+}
+
+/**
+ * put_group_info - Release a reference to a group info structure
+ * @group_info: The group info to release
+ */
+#define put_group_info(group_info)                      \
+do {                                                    \
+        if (atomic_dec_and_test(&(group_info)->usage))  \
+                groups_free(group_info);                \
+} while (0)
+
+extern struct group_info *groups_alloc(int);
+extern struct group_info init_groups;
+extern void groups_free(struct group_info *);
+extern int set_current_groups(struct group_info *);
+extern int set_groups(struct cred *, struct group_info *);
+extern int groups_search(const struct group_info *, gid_t);
+
+/* access the groups "array" with this macro */
+#define GROUP_AT(gi, i) \
+        ((gi)->blocks[(i) / NGROUPS_PER_BLOCK][(i) % NGROUPS_PER_BLOCK])
+
+extern int in_group_p(gid_t);
+extern int in_egroup_p(gid_t);
+
+/*
+ * The common credentials for a thread group
+ * - shared by CLONE_THREAD
+ */
+#ifdef CONFIG_KEYS
+struct thread_group_cred {
+        atomic_t        usage;
+        pid_t           tgid;                   /* thread group process ID */
+        spinlock_t      lock;
+        struct key      *session_keyring;       /* keyring inherited over fork */
+        struct key      *process_keyring;       /* keyring private to this process */
+        struct rcu_head rcu;                    /* RCU deletion hook */
+};
+#endif
+
+/*
+ * The security context of a task
+ *
+ * The parts of the context break down into two categories:
+ *
+ *  (1) The objective context of a task.  These parts are used when some other
+ *      task is attempting to affect this one.
+ *
+ *  (2) The subjective context.  These details are used when the task is acting
+ *      upon another object, be that a file, a task, a key or whatever.
+ *
+ * Note that some members of this structure belong to both categories - the
+ * LSM security pointer for instance.
+ *
+ * A task has two security pointers.  task->real_cred points to the objective
+ * context that defines that task's actual details.  The objective part of this
+ * context is used whenever that task is acted upon.
+ *
+ * task->cred points to the subjective context that defines the details of how
+ * that task is going to act upon another object.  This may be overridden
+ * temporarily to point to another security context, but normally points to the
+ * same context as task->real_cred.
+ */
+struct cred {
+        atomic_t        usage;
+        uid_t           uid;            /* real UID of the task */
+        gid_t           gid;            /* real GID of the task */
+        uid_t           suid;           /* saved UID of the task */
+        gid_t           sgid;           /* saved GID of the task */
+        uid_t           euid;           /* effective UID of the task */
+        gid_t           egid;           /* effective GID of the task */
+        uid_t           fsuid;          /* UID for VFS ops */
+        gid_t           fsgid;          /* GID for VFS ops */
+        unsigned        securebits;     /* SUID-less security management */
+        kernel_cap_t    cap_inheritable; /* caps our children can inherit */
+        kernel_cap_t    cap_permitted;  /* caps we're permitted */
+        kernel_cap_t    cap_effective;  /* caps we can actually use */
+        kernel_cap_t    cap_bset;       /* capability bounding set */
+#ifdef CONFIG_KEYS
+        unsigned char   jit_keyring;    /* default keyring to attach requested
+                                         * keys to */
+        struct key      *thread_keyring; /* keyring private to this thread */
+        struct key      *request_key_auth; /* assumed request_key authority */
+        struct thread_group_cred *tgcred; /* thread-group shared credentials */
+#endif
+#ifdef CONFIG_SECURITY
+        void            *security;      /* subjective LSM security */
+#endif
+        struct user_struct *user;       /* real user ID subscription */
+        struct group_info *group_info;  /* supplementary groups for euid/fsgid */
+        struct rcu_head rcu;            /* RCU deletion hook */
+};
+
+extern void __put_cred(struct cred *);
+extern int copy_creds(struct task_struct *, unsigned long);
+extern struct cred *prepare_creds(void);
+extern struct cred *prepare_exec_creds(void);
+extern struct cred *prepare_usermodehelper_creds(void);
+extern int commit_creds(struct cred *);
+extern void abort_creds(struct cred *);
+extern const struct cred *override_creds(const struct cred *);
+extern void revert_creds(const struct cred *);
+extern struct cred *prepare_kernel_cred(struct task_struct *);
+extern int change_create_files_as(struct cred *, struct inode *);
+extern int set_security_override(struct cred *, u32);
+extern int set_security_override_from_ctx(struct cred *, const char *);
+extern int set_create_files_as(struct cred *, struct inode *);
+extern void __init cred_init(void);
+
+/**
+ * get_new_cred - Get a reference on a new set of credentials
+ * @cred: The new credentials to reference
+ *
+ * Get a reference on the specified set of new credentials.  The caller must
+ * release the reference.
+ */
+static inline struct cred *get_new_cred(struct cred *cred)
+{
+        atomic_inc(&cred->usage);
+        return cred;
+}
+
+/**
+ * get_cred - Get a reference on a set of credentials
+ * @cred: The credentials to reference
+ *
+ * Get a reference on the specified set of credentials.  The caller must
+ * release the reference.
+ *
+ * This is used to deal with a committed set of credentials.  Although the
+ * pointer is const, this will temporarily discard the const and increment the
+ * usage count.  The purpose of this is to attempt to catch at compile time the
+ * accidental alteration of a set of credentials that should be considered
+ * immutable.
+ */
+static inline const struct cred *get_cred(const struct cred *cred)
+{
+        return get_new_cred((struct cred *) cred);
+}
+
+/**
+ * put_cred - Release a reference to a set of credentials
+ * @cred: The credentials to release
+ *
+ * Release a reference to a set of credentials, deleting them when the last ref
+ * is released.
+ *
+ * This takes a const pointer to a set of credentials because the credentials
+ * on task_struct are attached by const pointers to prevent accidental
+ * alteration of otherwise immutable credential sets.
+ */
+static inline void put_cred(const struct cred *_cred)
+{
+        struct cred *cred = (struct cred *) _cred;
+
+        BUG_ON(atomic_read(&(cred)->usage) <= 0);
+        if (atomic_dec_and_test(&(cred)->usage))
+                __put_cred(cred);
+}
+
+/**
+ * current_cred - Access the current task's subjective credentials
+ *
+ * Access the subjective credentials of the current task.
+ */
+#define current_cred() \
+        (current->cred)
+
+/**
+ * __task_cred - Access a task's objective credentials
+ * @task: The task to query
+ *
+ * Access the objective credentials of a task.  The caller must hold the RCU
+ * readlock.
+ *
+ * The caller must make sure task doesn't go away, either by holding a ref on
+ * task or by holding tasklist_lock to prevent it from being unlinked.
+ */
+#define __task_cred(task) \
+        ((const struct cred *)(rcu_dereference((task)->real_cred)))
+
+/**
+ * get_task_cred - Get another task's objective credentials
+ * @task: The task to query
+ *
+ * Get the objective credentials of a task, pinning them so that they can't go
+ * away.  Accessing a task's credentials directly is not permitted.
+ *
+ * The caller must make sure task doesn't go away, either by holding a ref on
+ * task or by holding tasklist_lock to prevent it from being unlinked.
+ */
+#define get_task_cred(task)                             \
+({                                                      \
+        struct cred *__cred;                            \
+        rcu_read_lock();                                \
+        __cred = (struct cred *) __task_cred((task));   \
+        get_cred(__cred);                               \
+        rcu_read_unlock();                              \
+        __cred;                                         \
+})
+
+/**
+ * get_current_cred - Get the current task's subjective credentials
+ *
+ * Get the subjective credentials of the current task, pinning them so that
+ * they can't go away.  Accessing the current task's credentials directly is
+ * not permitted.
+ */
+#define get_current_cred()                              \
+        (get_cred(current_cred()))
+
+/**
+ * get_current_user - Get the current task's user_struct
+ *
+ * Get the user record of the current task, pinning it so that it can't go
+ * away.
+ */
+#define get_current_user()                              \
+({                                                      \
+        struct user_struct *__u;                        \
+        struct cred *__cred;                            \
+        __cred = (struct cred *) current_cred();        \
+        __u = get_uid(__cred->user);                    \
+        __u;                                            \
+})
+
+/**
+ * get_current_groups - Get the current task's supplementary group list
+ *
+ * Get the supplementary group list of the current task, pinning it so that it
+ * can't go away.
+ */
+#define get_current_groups()                            \
+({                                                      \
+        struct group_info *__groups;                    \
+        struct cred *__cred;                            \
+        __cred = (struct cred *) current_cred();        \
+        __groups = get_group_info(__cred->group_info);  \
+        __groups;                                       \
+})
+
+#define task_cred_xxx(task, xxx)                        \
+({                                                      \
+        __typeof__(((struct cred *)NULL)->xxx) ___val;  \
+        rcu_read_lock();                                \
+        ___val = __task_cred((task))->xxx;              \
+        rcu_read_unlock();                              \
+        ___val;                                         \
+})
+
+#define task_uid(task)          (task_cred_xxx((task), uid))
+#define task_euid(task)         (task_cred_xxx((task), euid))
+
+#define current_cred_xxx(xxx)                   \
+({                                              \
+        current->cred->xxx;                     \
+})
+
+#define current_uid()           (current_cred_xxx(uid))
+#define current_gid()           (current_cred_xxx(gid))
+#define current_euid()          (current_cred_xxx(euid))
+#define current_egid()          (current_cred_xxx(egid))
+#define current_suid()          (current_cred_xxx(suid))
+#define current_sgid()          (current_cred_xxx(sgid))
+#define current_fsuid()         (current_cred_xxx(fsuid))
+#define current_fsgid()         (current_cred_xxx(fsgid))
+#define current_cap()           (current_cred_xxx(cap_effective))
+#define current_user()          (current_cred_xxx(user))
+#define current_user_ns()       (current_cred_xxx(user)->user_ns)
+#define current_security()      (current_cred_xxx(security))
 
 #define current_uid_gid(_uid, _gid)             \
 do {                                            \
-        *(_uid) = current->uid;                 \
-        *(_gid) = current->gid;                 \
+        const struct cred *__cred;              \
+        __cred = current_cred();                \
+        *(_uid) = __cred->uid;                  \
+        *(_gid) = __cred->gid;                  \
 } while(0)
 
-#define current_euid_egid(_uid, _gid)           \
+#define current_euid_egid(_euid, _egid)         \
 do {                                            \
-        *(_uid) = current->euid;                \
-        *(_gid) = current->egid;                \
+        const struct cred *__cred;              \
+        __cred = current_cred();                \
+        *(_euid) = __cred->euid;                \
+        *(_egid) = __cred->egid;                \
 } while(0)
 
-#define current_fsuid_fsgid(_uid, _gid)         \
+#define current_fsuid_fsgid(_fsuid, _fsgid)     \
 do {                                            \
-        *(_uid) = current->fsuid;               \
-        *(_gid) = current->fsgid;               \
+        const struct cred *__cred;              \
+        __cred = current_cred();                \
+        *(_fsuid) = __cred->fsuid;              \
+        *(_fsgid) = __cred->fsgid;              \
 } while(0)
 
 #endif /* _LINUX_CRED_H */
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 4a853ef6fd35..195a8cb2a749 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -316,6 +316,7 @@ struct poll_table_struct;
 struct kstatfs;
 struct vm_area_struct;
 struct vfsmount;
+struct cred;
 
 extern void __init inode_init(void);
 extern void __init inode_init_early(void);
@@ -827,7 +828,7 @@ struct file {
         fmode_t                 f_mode;
         loff_t                  f_pos;
         struct fown_struct      f_owner;
-        unsigned int            f_uid, f_gid;
+        const struct cred       *f_cred;
         struct file_ra_state    f_ra;
 
         u64                     f_version;
@@ -1194,7 +1195,7 @@ enum {
 #define has_fs_excl() atomic_read(&current->fs_excl)
 
 #define is_owner_or_cap(inode)  \
-        ((current->fsuid == (inode)->i_uid) || capable(CAP_FOWNER))
+        ((current_fsuid() == (inode)->i_uid) || capable(CAP_FOWNER))
 
 /* not quite ready to be deprecated, but... */
 extern void lock_super(struct super_block *);
@@ -1674,7 +1675,8 @@ extern int do_truncate(struct dentry *, loff_t start, unsigned int time_attrs,
 extern long do_sys_open(int dfd, const char __user *filename, int flags,
                         int mode);
 extern struct file *filp_open(const char *, int, int);
-extern struct file * dentry_open(struct dentry *, struct vfsmount *, int);
+extern struct file * dentry_open(struct dentry *, struct vfsmount *, int,
+                                 const struct cred *);
 extern int filp_close(struct file *, fl_owner_t id);
 extern char * getname(const char __user *);
 
diff --git a/include/linux/init_task.h b/include/linux/init_task.h
index 23fd8909b9e5..959f5522d10a 100644
--- a/include/linux/init_task.h
+++ b/include/linux/init_task.h
@@ -57,7 +57,6 @@ extern struct nsproxy init_nsproxy;
         .mnt_ns         = NULL,                                         \
         INIT_NET_NS(net_ns)                                             \
         INIT_IPC_NS(ipc_ns)                                             \
-        .user_ns        = &init_user_ns,                                \
 }
 
 #define INIT_SIGHAND(sighand) {                                         \
@@ -113,6 +112,8 @@ extern struct group_info init_groups;
 # define CAP_INIT_BSET  CAP_INIT_EFF_SET
 #endif
 
+extern struct cred init_cred;
+
 /*
  *  INIT_TASK is used to set up the first task table, touch at
  * your own risk!. Base=0, limit=0x1fffff (=2MB)
@@ -147,13 +148,10 @@ extern struct group_info init_groups;
         .children       = LIST_HEAD_INIT(tsk.children),                 \
         .sibling        = LIST_HEAD_INIT(tsk.sibling),                  \
         .group_leader   = &tsk,                                         \
-        .group_info     = &init_groups,                                 \
-        .cap_effective  = CAP_INIT_EFF_SET,                             \
-        .cap_inheritable = CAP_INIT_INH_SET,                            \
-        .cap_permitted  = CAP_FULL_SET,                                 \
-        .cap_bset       = CAP_INIT_BSET,                                \
-        .securebits     = SECUREBITS_DEFAULT,                           \
-        .user           = INIT_USER,                                    \
+        .real_cred      = &init_cred,                                   \
+        .cred           = &init_cred,                                   \
+        .cred_exec_mutex =                                              \
+                 __MUTEX_INITIALIZER(tsk.cred_exec_mutex),              \
         .comm           = "swapper",                                    \
         .thread         = INIT_THREAD,                                  \
         .fs             = &init_fs,                                     \
diff --git a/include/linux/key-ui.h b/include/linux/key-ui.h
deleted file mode 100644
index e8b8a7a5c496..000000000000
--- a/include/linux/key-ui.h
+++ /dev/null
@@ -1,66 +0,0 @@
-/* key-ui.h: key userspace interface stuff
- *
- * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-#ifndef _LINUX_KEY_UI_H
-#define _LINUX_KEY_UI_H
-
-#include <linux/key.h>
-
-/* the key tree */
-extern struct rb_root key_serial_tree;
-extern spinlock_t key_serial_lock;
-
-/* required permissions */
-#define KEY_VIEW        0x01    /* require permission to view attributes */
-#define KEY_READ        0x02    /* require permission to read content */
-#define KEY_WRITE       0x04    /* require permission to update / modify */
-#define KEY_SEARCH      0x08    /* require permission to search (keyring) or find (key) */
-#define KEY_LINK        0x10    /* require permission to link */
-#define KEY_SETATTR     0x20    /* require permission to change attributes */
-#define KEY_ALL         0x3f    /* all the above permissions */
-
-/*
- * the keyring payload contains a list of the keys to which the keyring is
- * subscribed
- */
-struct keyring_list {
-        struct rcu_head rcu;            /* RCU deletion hook */
-        unsigned short  maxkeys;        /* max keys this list can hold */
-        unsigned short  nkeys;          /* number of keys currently held */
-        unsigned short  delkey;         /* key to be unlinked by RCU */
-        struct key      *keys[0];
-};
-
-/*
- * check to see whether permission is granted to use a key in the desired way
- */
-extern int key_task_permission(const key_ref_t key_ref,
-                               struct task_struct *context,
-                               key_perm_t perm);
-
-static inline int key_permission(const key_ref_t key_ref, key_perm_t perm)
-{
-        return key_task_permission(key_ref, current, perm);
-}
-
-extern key_ref_t lookup_user_key(struct task_struct *context,
-                                 key_serial_t id, int create, int partial,
-                                 key_perm_t perm);
-
-extern long join_session_keyring(const char *name);
-
-extern struct key_type *key_type_lookup(const char *type);
-extern void key_type_put(struct key_type *ktype);
-
-#define key_negative_timeout    60      /* default timeout on a negative key's existence */
-
-
-#endif /* _LINUX_KEY_UI_H */
diff --git a/include/linux/key.h b/include/linux/key.h
index 1b70e35a71e3..21d32a142c00 100644
--- a/include/linux/key.h
+++ b/include/linux/key.h
@@ -73,6 +73,7 @@ struct key;
 struct seq_file;
 struct user_struct;
 struct signal_struct;
+struct cred;
 
 struct key_type;
 struct key_owner;
@@ -181,7 +182,7 @@ struct key {
 extern struct key *key_alloc(struct key_type *type,
                              const char *desc,
                              uid_t uid, gid_t gid,
-                             struct task_struct *ctx,
+                             const struct cred *cred,
                              key_perm_t perm,
                              unsigned long flags);
 
@@ -249,7 +250,7 @@ extern int key_unlink(struct key *keyring,
                       struct key *key);
 
 extern struct key *keyring_alloc(const char *description, uid_t uid, gid_t gid,
-                                 struct task_struct *ctx,
+                                 const struct cred *cred,
                                  unsigned long flags,
                                  struct key *dest);
 
@@ -276,24 +277,11 @@ extern ctl_table key_sysctls[];
 /*
  * the userspace interface
  */
-extern void switch_uid_keyring(struct user_struct *new_user);
-extern int copy_keys(unsigned long clone_flags, struct task_struct *tsk);
-extern int copy_thread_group_keys(struct task_struct *tsk);
-extern void exit_keys(struct task_struct *tsk);
-extern void exit_thread_group_keys(struct signal_struct *tg);
-extern int suid_keys(struct task_struct *tsk);
-extern int exec_keys(struct task_struct *tsk);
+extern int install_thread_keyring_to_cred(struct cred *cred);
 extern void key_fsuid_changed(struct task_struct *tsk);
 extern void key_fsgid_changed(struct task_struct *tsk);
 extern void key_init(void);
 
-#define __install_session_keyring(tsk, keyring)                 \
-({                                                              \
-        struct key *old_session = tsk->signal->session_keyring; \
-        tsk->signal->session_keyring = keyring;                 \
-        old_session;                                            \
-})
-
 #else /* CONFIG_KEYS */
 
 #define key_validate(k)                 0
@@ -302,17 +290,9 @@ extern void key_init(void);
 #define key_revoke(k)                   do { } while(0)
 #define key_put(k)                      do { } while(0)
 #define key_ref_put(k)                  do { } while(0)
-#define make_key_ref(k, p)                      ({ NULL; })
-#define key_ref_to_ptr(k)               ({ NULL; })
+#define make_key_ref(k, p)              NULL
+#define key_ref_to_ptr(k)               NULL
 #define is_key_possessed(k)             0
-#define switch_uid_keyring(u)           do { } while(0)
-#define __install_session_keyring(t, k) ({ NULL; })
-#define copy_keys(f,t)                  0
-#define copy_thread_group_keys(t)       0
-#define exit_keys(t)                    do { } while(0)
-#define exit_thread_group_keys(tg)      do { } while(0)
-#define suid_keys(t)                    do { } while(0)
-#define exec_keys(t)                    do { } while(0)
 #define key_fsuid_changed(t)            do { } while(0)
 #define key_fsgid_changed(t)            do { } while(0)
 #define key_init()                      do { } while(0)
diff --git a/include/linux/keyctl.h b/include/linux/keyctl.h
index 656ee6b77a4a..c0688eb72093 100644
--- a/include/linux/keyctl.h
+++ b/include/linux/keyctl.h
@@ -1,6 +1,6 @@
 /* keyctl.h: keyctl command IDs
  *
- * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
+ * Copyright (C) 2004, 2008 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
  *
  * This program is free software; you can redistribute it and/or
@@ -20,6 +20,7 @@
 #define KEY_SPEC_USER_SESSION_KEYRING   -5      /* - key ID for UID-session keyring */
 #define KEY_SPEC_GROUP_KEYRING          -6      /* - key ID for GID-specific keyring */
 #define KEY_SPEC_REQKEY_AUTH_KEY        -7      /* - key ID for assumed request_key auth key */
+#define KEY_SPEC_REQUESTOR_KEYRING      -8      /* - key ID for request_key() dest keyring */
 
 /* request-key default keyrings */
 #define KEY_REQKEY_DEFL_NO_CHANGE               -1
@@ -30,6 +31,7 @@
 #define KEY_REQKEY_DEFL_USER_KEYRING            4
 #define KEY_REQKEY_DEFL_USER_SESSION_KEYRING    5
 #define KEY_REQKEY_DEFL_GROUP_KEYRING           6
+#define KEY_REQKEY_DEFL_REQUESTOR_KEYRING       7
 
 /* keyctl commands */
 #define KEYCTL_GET_KEYRING_ID           0       /* ask for a keyring's ID */
diff --git a/include/linux/nsproxy.h b/include/linux/nsproxy.h
index c8a768e59640..afad7dec1b36 100644
--- a/include/linux/nsproxy.h
+++ b/include/linux/nsproxy.h
@@ -27,7 +27,6 @@ struct nsproxy {
         struct ipc_namespace *ipc_ns;
         struct mnt_namespace *mnt_ns;
         struct pid_namespace *pid_ns;
-        struct user_namespace *user_ns;
         struct net           *net_ns;
 };
 extern struct nsproxy init_nsproxy;
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 55e30d114477..9624e2cfc2dc 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -572,12 +572,6 @@ struct signal_struct {
          */
         struct rlimit rlim[RLIM_NLIMITS];
 
-        /* keep the process-shared keyrings here so that they do the right
-         * thing in threads created with CLONE_THREAD */
-#ifdef CONFIG_KEYS
-        struct key *session_keyring;    /* keyring inherited over fork */
-        struct key *process_keyring;    /* keyring private to this process */
-#endif
 #ifdef CONFIG_BSD_PROCESS_ACCT
         struct pacct_struct pacct;      /* per-process accounting information */
 #endif
@@ -648,6 +642,7 @@ struct user_struct {
         /* Hash table maintenance information */
         struct hlist_node uidhash_node;
         uid_t uid;
+        struct user_namespace *user_ns;
 
 #ifdef CONFIG_USER_SCHED
         struct task_group *tg;
@@ -665,6 +660,7 @@ extern struct user_struct *find_user(uid_t);
 extern struct user_struct root_user;
 #define INIT_USER (&root_user)
 
+
 struct backing_dev_info;
 struct reclaim_state;
 
@@ -888,38 +884,7 @@ partition_sched_domains(int ndoms_new, cpumask_t *doms_new,
 #endif  /* !CONFIG_SMP */
 
 struct io_context;                      /* See blkdev.h */
-#define NGROUPS_SMALL           32
-#define NGROUPS_PER_BLOCK       ((unsigned int)(PAGE_SIZE / sizeof(gid_t)))
-struct group_info {
-        int ngroups;
-        atomic_t usage;
-        gid_t small_block[NGROUPS_SMALL];
-        int nblocks;
-        gid_t *blocks[0];
-};
 
-/*
- * get_group_info() must be called with the owning task locked (via task_lock())
- * when task != current.  The reason being that the vast majority of callers are
- * looking at current->group_info, which can not be changed except by the
- * current task.  Changing current->group_info requires the task lock, too.
- */
-#define get_group_info(group_info) do { \
-        atomic_inc(&(group_info)->usage); \
-} while (0)
-
-#define put_group_info(group_info) do { \
-        if (atomic_dec_and_test(&(group_info)->usage)) \
-                groups_free(group_info); \
-} while (0)
-
-extern struct group_info *groups_alloc(int gidsetsize);
-extern void groups_free(struct group_info *group_info);
-extern int set_current_groups(struct group_info *group_info);
-extern int groups_search(struct group_info *group_info, gid_t grp);
-/* access the groups "array" with this macro */
-#define GROUP_AT(gi, i) \
-    ((gi)->blocks[(i)/NGROUPS_PER_BLOCK][(i)%NGROUPS_PER_BLOCK])
 
 #ifdef ARCH_HAS_PREFETCH_SWITCH_STACK
 extern void prefetch_stack(struct task_struct *t);
@@ -1186,17 +1151,12 @@ struct task_struct {
         struct list_head cpu_timers[3];
 
 /* process credentials */
-        uid_t uid,euid,suid,fsuid;
-        gid_t gid,egid,sgid,fsgid;
-        struct group_info *group_info;
-        kernel_cap_t   cap_effective, cap_inheritable, cap_permitted, cap_bset;
-        struct user_struct *user;
-        unsigned securebits;
-#ifdef CONFIG_KEYS
-        unsigned char jit_keyring;      /* default keyring to attach requested keys to */
-        struct key *request_key_auth;   /* assumed request_key authority */
-        struct key *thread_keyring;     /* keyring private to this thread */
-#endif
+        const struct cred *real_cred;   /* objective and real subjective task
+                                         * credentials (COW) */
+        const struct cred *cred;        /* effective (overridable) subjective task
+                                         * credentials (COW) */
+        struct mutex cred_exec_mutex;   /* execve vs ptrace cred calculation mutex */
+
         char comm[TASK_COMM_LEN]; /* executable name excluding path
                                      - access with [gs]et_task_comm (which lock
                                        it with task_lock())
@@ -1233,9 +1193,6 @@ struct task_struct {
         int (*notifier)(void *priv);
         void *notifier_data;
         sigset_t *notifier_mask;
-#ifdef CONFIG_SECURITY
-        void *security;
-#endif
         struct audit_context *audit_context;
 #ifdef CONFIG_AUDITSYSCALL
         uid_t loginuid;
@@ -1775,7 +1732,6 @@ static inline struct user_struct *get_uid(struct user_struct *u)
         return u;
 }
 extern void free_uid(struct user_struct *);
-extern void switch_uid(struct user_struct *);
 extern void release_uids(struct user_namespace *ns);
 
 #include <asm/current.h>
@@ -1794,9 +1750,6 @@ extern void wake_up_new_task(struct task_struct *tsk,
 extern void sched_fork(struct task_struct *p, int clone_flags);
 extern void sched_dead(struct task_struct *p);
 
-extern int in_group_p(gid_t);
-extern int in_egroup_p(gid_t);
-
 extern void proc_caches_init(void);
 extern void flush_signals(struct task_struct *);
 extern void ignore_signals(struct task_struct *);
@@ -1928,6 +1881,8 @@ static inline unsigned long wait_task_inactive(struct task_struct *p,
 #define for_each_process(p) \
         for (p = &init_task ; (p = next_task(p)) != &init_task ; )
 
+extern bool is_single_threaded(struct task_struct *);
+
 /*
  * Careful: do_each_thread/while_each_thread is a double loop so
  *          'break' will not work as expected - use goto instead.
diff --git a/include/linux/securebits.h b/include/linux/securebits.h
index 92f09bdf1175..d2c5ed845bcc 100644
--- a/include/linux/securebits.h
+++ b/include/linux/securebits.h
@@ -32,7 +32,7 @@
    setting is locked or not. A setting which is locked cannot be
    changed from user-level. */
 #define issecure_mask(X)        (1 << (X))
-#define issecure(X)             (issecure_mask(X) & current->securebits)
+#define issecure(X)             (issecure_mask(X) & current_cred_xxx(securebits))
 
 #define SECURE_ALL_BITS         (issecure_mask(SECURE_NOROOT) | \
                                  issecure_mask(SECURE_NO_SETUID_FIXUP) | \
diff --git a/include/linux/security.h b/include/linux/security.h
index e3d4ecda2673..3416cb85e77b 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -37,6 +37,10 @@
 /* Maximum number of letters for an LSM name string */
 #define SECURITY_NAME_MAX       10
 
+/* If capable should audit the security request */
+#define SECURITY_CAP_NOAUDIT 0
+#define SECURITY_CAP_AUDIT 1
+
 struct ctl_table;
 struct audit_krule;
 
@@ -44,25 +48,25 @@ struct audit_krule;
  * These functions are in security/capability.c and are used
  * as the default capabilities functions
  */
-extern int cap_capable(struct task_struct *tsk, int cap);
+extern int cap_capable(struct task_struct *tsk, int cap, int audit);
 extern int cap_settime(struct timespec *ts, struct timezone *tz);
 extern int cap_ptrace_may_access(struct task_struct *child, unsigned int mode);
 extern int cap_ptrace_traceme(struct task_struct *parent);
 extern int cap_capget(struct task_struct *target, kernel_cap_t *effective, kernel_cap_t *inheritable, kernel_cap_t *permitted);
-extern int cap_capset_check(struct task_struct *target, kernel_cap_t *effective, kernel_cap_t *inheritable, kernel_cap_t *permitted);
-extern void cap_capset_set(struct task_struct *target, kernel_cap_t *effective, kernel_cap_t *inheritable, kernel_cap_t *permitted);
-extern int cap_bprm_set_security(struct linux_binprm *bprm);
-extern void cap_bprm_apply_creds(struct linux_binprm *bprm, int unsafe);
+extern int cap_capset(struct cred *new, const struct cred *old,
+                      const kernel_cap_t *effective,
+                      const kernel_cap_t *inheritable,
+                      const kernel_cap_t *permitted);
+extern int cap_bprm_set_creds(struct linux_binprm *bprm);
 extern int cap_bprm_secureexec(struct linux_binprm *bprm);
 extern int cap_inode_setxattr(struct dentry *dentry, const char *name,
                               const void *value, size_t size, int flags);
 extern int cap_inode_removexattr(struct dentry *dentry, const char *name);
 extern int cap_inode_need_killpriv(struct dentry *dentry);
 extern int cap_inode_killpriv(struct dentry *dentry);
-extern int cap_task_post_setuid(uid_t old_ruid, uid_t old_euid, uid_t old_suid, int flags);
-extern void cap_task_reparent_to_init(struct task_struct *p);
+extern int cap_task_fix_setuid(struct cred *new, const struct cred *old, int flags);
 extern int cap_task_prctl(int option, unsigned long arg2, unsigned long arg3,
-                          unsigned long arg4, unsigned long arg5, long *rc_p);
+                          unsigned long arg4, unsigned long arg5);
 extern int cap_task_setscheduler(struct task_struct *p, int policy, struct sched_param *lp);
 extern int cap_task_setioprio(struct task_struct *p, int ioprio);
 extern int cap_task_setnice(struct task_struct *p, int nice);
@@ -105,7 +109,7 @@ extern unsigned long mmap_min_addr;
 struct sched_param;
 struct request_sock;
 
-/* bprm_apply_creds unsafe reasons */
+/* bprm->unsafe reasons */
 #define LSM_UNSAFE_SHARE        1
 #define LSM_UNSAFE_PTRACE       2
 #define LSM_UNSAFE_PTRACE_CAP   4
@@ -149,36 +153,7 @@ static inline void security_free_mnt_opts(struct security_mnt_opts *opts)
  *
  * Security hooks for program execution operations.
  *
- * @bprm_alloc_security:
- *      Allocate and attach a security structure to the @bprm->security field.
- *      The security field is initialized to NULL when the bprm structure is
- *      allocated.
- *      @bprm contains the linux_binprm structure to be modified.
- *      Return 0 if operation was successful.
- * @bprm_free_security:
- *      @bprm contains the linux_binprm structure to be modified.
- *      Deallocate and clear the @bprm->security field.
- * @bprm_apply_creds:
- *      Compute and set the security attributes of a process being transformed
- *      by an execve operation based on the old attributes (current->security)
- *      and the information saved in @bprm->security by the set_security hook.
- *      Since this hook function (and its caller) are void, this hook can not
- *      return an error.  However, it can leave the security attributes of the
- *      process unchanged if an access failure occurs at this point.
- *      bprm_apply_creds is called under task_lock.  @unsafe indicates various
- *      reasons why it may be unsafe to change security state.
- *      @bprm contains the linux_binprm structure.
- * @bprm_post_apply_creds:
- *      Runs after bprm_apply_creds with the task_lock dropped, so that
- *      functions which cannot be called safely under the task_lock can
- *      be used.  This hook is a good place to perform state changes on
- *      the process such as closing open file descriptors to which access
- *      is no longer granted if the attributes were changed.
- *      Note that a security module might need to save state between
- *      bprm_apply_creds and bprm_post_apply_creds to store the decision
- *      on whether the process may proceed.
- *      @bprm contains the linux_binprm structure.
- * @bprm_set_security:
+ * @bprm_set_creds:
  *      Save security information in the bprm->security field, typically based
  *      on information about the bprm->file, for later use by the apply_creds
  *      hook.  This hook may also optionally check permissions (e.g. for
@@ -191,15 +166,30 @@ static inline void security_free_mnt_opts(struct security_mnt_opts *opts)
  *      @bprm contains the linux_binprm structure.
  *      Return 0 if the hook is successful and permission is granted.
  * @bprm_check_security:
- *      This hook mediates the point when a search for a binary handler will
- *      begin.  It allows a check the @bprm->security value which is set in
- *      the preceding set_security call.  The primary difference from
- *      set_security is that the argv list and envp list are reliably
- *      available in @bprm.  This hook may be called multiple times
- *      during a single execve; and in each pass set_security is called
- *      first.
+ *      This hook mediates the point when a search for a binary handler will
+ *      begin.  It allows a check the @bprm->security value which is set in the
+ *      preceding set_creds call.  The primary difference from set_creds is
+ *      that the argv list and envp list are reliably available in @bprm.  This
+ *      hook may be called multiple times during a single execve; and in each
+ *      pass set_creds is called first.
  *      @bprm contains the linux_binprm structure.
  *      Return 0 if the hook is successful and permission is granted.
+ * @bprm_committing_creds:
+ *      Prepare to install the new security attributes of a process being
+ *      transformed by an execve operation, based on the old credentials
+ *      pointed to by @current->cred and the information set in @bprm->cred by
+ *      the bprm_set_creds hook.  @bprm points to the linux_binprm structure.
+ *      This hook is a good place to perform state changes on the process such
+ *      as closing open file descriptors to which access will no longer be
+ *      granted when the attributes are changed.  This is called immediately
+ *      before commit_creds().
+ * @bprm_committed_creds:
+ *      Tidy up after the installation of the new security attributes of a
+ *      process being transformed by an execve operation.  The new credentials
+ *      have, by this point, been set to @current->cred.  @bprm points to the
+ *      linux_binprm structure.  This hook is a good place to perform state
+ *      changes on the process such as clearing out non-inheritable signal
+ *      state.  This is called immediately after commit_creds().
  * @bprm_secureexec:
  *      Return a boolean value (0 or 1) indicating whether a "secure exec"
  *      is required.  The flag is passed in the auxiliary table
@@ -585,15 +575,31 @@ static inline void security_free_mnt_opts(struct security_mnt_opts *opts)
  *      manual page for definitions of the @clone_flags.
  *      @clone_flags contains the flags indicating what should be shared.
  *      Return 0 if permission is granted.
- * @task_alloc_security:
- *      @p contains the task_struct for child process.
- *      Allocate and attach a security structure to the p->security field. The
- *      security field is initialized to NULL when the task structure is
- *      allocated.
- *      Return 0 if operation was successful.
- * @task_free_security:
- *      @p contains the task_struct for process.
- *      Deallocate and clear the p->security field.
+ * @cred_free:
+ *      @cred points to the credentials.
+ *      Deallocate and clear the cred->security field in a set of credentials.
+ * @cred_prepare:
+ *      @new points to the new credentials.
+ *      @old points to the original credentials.
+ *      @gfp indicates the atomicity of any memory allocations.
+ *      Prepare a new set of credentials by copying the data from the old set.
+ * @cred_commit:
+ *      @new points to the new credentials.
+ *      @old points to the original credentials.
+ *      Install a new set of credentials.
+ * @kernel_act_as:
+ *      Set the credentials for a kernel service to act as (subjective context).
+ *      @new points to the credentials to be modified.
+ *      @secid specifies the security ID to be set
+ *      The current task must be the one that nominated @secid.
+ *      Return 0 if successful.
+ * @kernel_create_files_as:
+ *      Set the file creation context in a set of credentials to be the same as
+ *      the objective context of the specified inode.
+ *      @new points to the credentials to be modified.
+ *      @inode points to the inode to use as a reference.
+ *      The current task must be the one that nominated @inode.
+ *      Return 0 if successful.
  * @task_setuid:
  *      Check permission before setting one or more of the user identity
  *      attributes of the current process.  The @flags parameter indicates
@@ -606,15 +612,13 @@ static inline void security_free_mnt_opts(struct security_mnt_opts *opts)
  *      @id2 contains a uid.
  *      @flags contains one of the LSM_SETID_* values.
  *      Return 0 if permission is granted.
- * @task_post_setuid:
+ * @task_fix_setuid:
  *      Update the module's state after setting one or more of the user
  *      identity attributes of the current process.  The @flags parameter
  *      indicates which of the set*uid system calls invoked this hook.  If
- *      @flags is LSM_SETID_FS, then @old_ruid is the old fs uid and the other
- *      parameters are not used.
- *      @old_ruid contains the old real uid (or fs uid if LSM_SETID_FS).
- *      @old_euid contains the old effective uid (or -1 if LSM_SETID_FS).
- *      @old_suid contains the old saved uid (or -1 if LSM_SETID_FS).
+ *      @new is the set of credentials that will be installed.  Modifications
+ *      should be made to this rather than to @current->cred.
+ *      @old is the set of credentials that are being replaces
  *      @flags contains one of the LSM_SETID_* values.
  *      Return 0 on success.
  * @task_setgid:
@@ -717,13 +721,8 @@ static inline void security_free_mnt_opts(struct security_mnt_opts *opts)
  *      @arg3 contains a argument.
  *      @arg4 contains a argument.
  *      @arg5 contains a argument.
- *      @rc_p contains a pointer to communicate back the forced return code
- *      Return 0 if permission is granted, and non-zero if the security module
- *      has taken responsibility (setting *rc_p) for the prctl call.
- * @task_reparent_to_init:
- *      Set the security attributes in @p->security for a kernel thread that
- *      is being reparented to the init task.
- *      @p contains the task_struct for the kernel thread.
+ *      Return -ENOSYS if no-one wanted to handle this op, any other value to
+ *      cause prctl() to return immediately with that value.
  * @task_to_inode:
  *      Set the security attributes for an inode based on an associated task's
  *      security attributes, e.g. for /proc/pid inodes.
@@ -1000,7 +999,7 @@ static inline void security_free_mnt_opts(struct security_mnt_opts *opts)
  *      See whether a specific operational right is granted to a process on a
  *      key.
  *      @key_ref refers to the key (key pointer + possession attribute bit).
- *      @context points to the process to provide the context against which to
+ *      @cred points to the credentials to provide the context against which to
  *      evaluate the security data on the key.
  *      @perm describes the combination of permissions required of this key.
  *      Return 1 if permission granted, 0 if permission denied and -ve it the
@@ -1162,6 +1161,7 @@ static inline void security_free_mnt_opts(struct security_mnt_opts *opts)
  *      @child process.
  *      Security modules may also want to perform a process tracing check
  *      during an execve in the set_security or apply_creds hooks of
+ *      tracing check during an execve in the bprm_set_creds hook of
  *      binprm_security_ops if the process is being traced and its security
  *      attributes would be changed by the execve.
  *      @child contains the task_struct structure for the target process.
@@ -1185,29 +1185,15 @@ static inline void security_free_mnt_opts(struct security_mnt_opts *opts)
  *      @inheritable contains the inheritable capability set.
  *      @permitted contains the permitted capability set.
  *      Return 0 if the capability sets were successfully obtained.
- * @capset_check:
- *      Check permission before setting the @effective, @inheritable, and
- *      @permitted capability sets for the @target process.
- *      Caveat:  @target is also set to current if a set of processes is
- *      specified (i.e. all processes other than current and init or a
- *      particular process group).  Hence, the capset_set hook may need to
- *      revalidate permission to the actual target process.
- *      @target contains the task_struct structure for target process.
- *      @effective contains the effective capability set.
- *      @inheritable contains the inheritable capability set.
- *      @permitted contains the permitted capability set.
- *      Return 0 if permission is granted.
- * @capset_set:
+ * @capset:
  *      Set the @effective, @inheritable, and @permitted capability sets for
- *      the @target process.  Since capset_check cannot always check permission
- *      to the real @target process, this hook may also perform permission
- *      checking to determine if the current process is allowed to set the
- *      capability sets of the @target process.  However, this hook has no way
- *      of returning an error due to the structure of the sys_capset code.
- *      @target contains the task_struct structure for target process.
+ *      the current process.
+ *      @new contains the new credentials structure for target process.
+ *      @old contains the current credentials structure for target process.
  *      @effective contains the effective capability set.
  *      @inheritable contains the inheritable capability set.
  *      @permitted contains the permitted capability set.
+ *      Return 0 and update @new if permission is granted.
  * @capable:
  *      Check whether the @tsk process has the @cap capability.
  *      @tsk contains the task_struct for the process.
@@ -1299,15 +1285,12 @@ struct security_operations {
         int (*capget) (struct task_struct *target,
                        kernel_cap_t *effective,
                        kernel_cap_t *inheritable, kernel_cap_t *permitted);
-        int (*capset_check) (struct task_struct *target,
-                             kernel_cap_t *effective,
-                             kernel_cap_t *inheritable,
-                             kernel_cap_t *permitted);
-        void (*capset_set) (struct task_struct *target,
-                            kernel_cap_t *effective,
-                            kernel_cap_t *inheritable,
-                            kernel_cap_t *permitted);
-        int (*capable) (struct task_struct *tsk, int cap);
+        int (*capset) (struct cred *new,
+                       const struct cred *old,
+                       const kernel_cap_t *effective,
+                       const kernel_cap_t *inheritable,
+                       const kernel_cap_t *permitted);
+        int (*capable) (struct task_struct *tsk, int cap, int audit);
         int (*acct) (struct file *file);
         int (*sysctl) (struct ctl_table *table, int op);
         int (*quotactl) (int cmds, int type, int id, struct super_block *sb);
@@ -1316,18 +1299,16 @@ struct security_operations {
         int (*settime) (struct timespec *ts, struct timezone *tz);
         int (*vm_enough_memory) (struct mm_struct *mm, long pages);
 
-        int (*bprm_alloc_security) (struct linux_binprm *bprm);
-        void (*bprm_free_security) (struct linux_binprm *bprm);
-        void (*bprm_apply_creds) (struct linux_binprm *bprm, int unsafe);
-        void (*bprm_post_apply_creds) (struct linux_binprm *bprm);
-        int (*bprm_set_security) (struct linux_binprm *bprm);
+        int (*bprm_set_creds) (struct linux_binprm *bprm);
         int (*bprm_check_security) (struct linux_binprm *bprm);
         int (*bprm_secureexec) (struct linux_binprm *bprm);
+        void (*bprm_committing_creds) (struct linux_binprm *bprm);
+        void (*bprm_committed_creds) (struct linux_binprm *bprm);
 
         int (*sb_alloc_security) (struct super_block *sb);
         void (*sb_free_security) (struct super_block *sb);
         int (*sb_copy_data) (char *orig, char *copy);
-        int (*sb_kern_mount) (struct super_block *sb, void *data);
+        int (*sb_kern_mount) (struct super_block *sb, int flags, void *data);
         int (*sb_show_options) (struct seq_file *m, struct super_block *sb);
         int (*sb_statfs) (struct dentry *dentry);
         int (*sb_mount) (char *dev_name, struct path *path,
@@ -1406,14 +1387,18 @@ struct security_operations {
         int (*file_send_sigiotask) (struct task_struct *tsk,
                                     struct fown_struct *fown, int sig);
         int (*file_receive) (struct file *file);
-        int (*dentry_open) (struct file *file);
+        int (*dentry_open) (struct file *file, const struct cred *cred);
 
         int (*task_create) (unsigned long clone_flags);
-        int (*task_alloc_security) (struct task_struct *p);
-        void (*task_free_security) (struct task_struct *p);
+        void (*cred_free) (struct cred *cred);
+        int (*cred_prepare)(struct cred *new, const struct cred *old,
+                            gfp_t gfp);
+        void (*cred_commit)(struct cred *new, const struct cred *old);
+        int (*kernel_act_as)(struct cred *new, u32 secid);
+        int (*kernel_create_files_as)(struct cred *new, struct inode *inode);
         int (*task_setuid) (uid_t id0, uid_t id1, uid_t id2, int flags);
-        int (*task_post_setuid) (uid_t old_ruid /* or fsuid */ ,
-                                 uid_t old_euid, uid_t old_suid, int flags);
+        int (*task_fix_setuid) (struct cred *new, const struct cred *old,
+                                int flags);
         int (*task_setgid) (gid_t id0, gid_t id1, gid_t id2, int flags);
         int (*task_setpgid) (struct task_struct *p, pid_t pgid);
         int (*task_getpgid) (struct task_struct *p);
@@ -1433,8 +1418,7 @@ struct security_operations {
         int (*task_wait) (struct task_struct *p);
         int (*task_prctl) (int option, unsigned long arg2,
                            unsigned long arg3, unsigned long arg4,
-                           unsigned long arg5, long *rc_p);
-        void (*task_reparent_to_init) (struct task_struct *p);
+                           unsigned long arg5);
         void (*task_to_inode) (struct task_struct *p, struct inode *inode);
 
         int (*ipc_permission) (struct kern_ipc_perm *ipcp, short flag);
@@ -1539,10 +1523,10 @@ struct security_operations {
 
         /* key management security hooks */
 #ifdef CONFIG_KEYS
-        int (*key_alloc) (struct key *key, struct task_struct *tsk, unsigned long flags);
+        int (*key_alloc) (struct key *key, const struct cred *cred, unsigned long flags);
         void (*key_free) (struct key *key);
         int (*key_permission) (key_ref_t key_ref,
-                               struct task_struct *context,
+                               const struct cred *cred,
                                key_perm_t perm);
         int (*key_getsecurity)(struct key *key, char **_buffer);
 #endif  /* CONFIG_KEYS */
@@ -1568,15 +1552,12 @@ int security_capget(struct task_struct *target,
                     kernel_cap_t *effective,
                     kernel_cap_t *inheritable,
                     kernel_cap_t *permitted);
-int security_capset_check(struct task_struct *target,
-                          kernel_cap_t *effective,
-                          kernel_cap_t *inheritable,
-                          kernel_cap_t *permitted);
-void security_capset_set(struct task_struct *target,
-                         kernel_cap_t *effective,
-                         kernel_cap_t *inheritable,
-                         kernel_cap_t *permitted);
+int security_capset(struct cred *new, const struct cred *old,
+                    const kernel_cap_t *effective,
+                    const kernel_cap_t *inheritable,
+                    const kernel_cap_t *permitted);
 int security_capable(struct task_struct *tsk, int cap);
+int security_capable_noaudit(struct task_struct *tsk, int cap);
 int security_acct(struct file *file);
 int security_sysctl(struct ctl_table *table, int op);
 int security_quotactl(int cmds, int type, int id, struct super_block *sb);
@@ -1586,17 +1567,15 @@ int security_settime(struct timespec *ts, struct timezone *tz);
 int security_vm_enough_memory(long pages);
 int security_vm_enough_memory_mm(struct mm_struct *mm, long pages);
 int security_vm_enough_memory_kern(long pages);
-int security_bprm_alloc(struct linux_binprm *bprm);
-void security_bprm_free(struct linux_binprm *bprm);
-void security_bprm_apply_creds(struct linux_binprm *bprm, int unsafe);
-void security_bprm_post_apply_creds(struct linux_binprm *bprm);
-int security_bprm_set(struct linux_binprm *bprm);
+int security_bprm_set_creds(struct linux_binprm *bprm);
 int security_bprm_check(struct linux_binprm *bprm);
+void security_bprm_committing_creds(struct linux_binprm *bprm);
+void security_bprm_committed_creds(struct linux_binprm *bprm);
 int security_bprm_secureexec(struct linux_binprm *bprm);
 int security_sb_alloc(struct super_block *sb);
 void security_sb_free(struct super_block *sb);
 int security_sb_copy_data(char *orig, char *copy);
-int security_sb_kern_mount(struct super_block *sb, void *data);
+int security_sb_kern_mount(struct super_block *sb, int flags, void *data);
 int security_sb_show_options(struct seq_file *m, struct super_block *sb);
 int security_sb_statfs(struct dentry *dentry);
 int security_sb_mount(char *dev_name, struct path *path,
@@ -1663,13 +1642,16 @@ int security_file_set_fowner(struct file *file);
 int security_file_send_sigiotask(struct task_struct *tsk,
                                  struct fown_struct *fown, int sig);
 int security_file_receive(struct file *file);
-int security_dentry_open(struct file *file);
+int security_dentry_open(struct file *file, const struct cred *cred);
 int security_task_create(unsigned long clone_flags);
-int security_task_alloc(struct task_struct *p);
-void security_task_free(struct task_struct *p);
+void security_cred_free(struct cred *cred);
+int security_prepare_creds(struct cred *new, const struct cred *old, gfp_t gfp);
+void security_commit_creds(struct cred *new, const struct cred *old);
+int security_kernel_act_as(struct cred *new, u32 secid);
+int security_kernel_create_files_as(struct cred *new, struct inode *inode);
 int security_task_setuid(uid_t id0, uid_t id1, uid_t id2, int flags);
-int security_task_post_setuid(uid_t old_ruid, uid_t old_euid,
-                              uid_t old_suid, int flags);
+int security_task_fix_setuid(struct cred *new, const struct cred *old,
+                             int flags);
 int security_task_setgid(gid_t id0, gid_t id1, gid_t id2, int flags);
 int security_task_setpgid(struct task_struct *p, pid_t pgid);
 int security_task_getpgid(struct task_struct *p);
@@ -1688,8 +1670,7 @@ int security_task_kill(struct task_struct *p, struct siginfo *info,
                         int sig, u32 secid);
 int security_task_wait(struct task_struct *p);
 int security_task_prctl(int option, unsigned long arg2, unsigned long arg3,
-                         unsigned long arg4, unsigned long arg5, long *rc_p);
-void security_task_reparent_to_init(struct task_struct *p);
+                        unsigned long arg4, unsigned long arg5);
 void security_task_to_inode(struct task_struct *p, struct inode *inode);
 int security_ipc_permission(struct kern_ipc_perm *ipcp, short flag);
 void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid);
@@ -1764,25 +1745,23 @@ static inline int security_capget(struct task_struct *target,
         return cap_capget(target, effective, inheritable, permitted);
 }
 
-static inline int security_capset_check(struct task_struct *target,
-                                         kernel_cap_t *effective,
-                                         kernel_cap_t *inheritable,
-                                         kernel_cap_t *permitted)
+static inline int security_capset(struct cred *new,
+                                   const struct cred *old,
+                                   const kernel_cap_t *effective,
+                                   const kernel_cap_t *inheritable,
+                                   const kernel_cap_t *permitted)
 {
-        return cap_capset_check(target, effective, inheritable, permitted);
+        return cap_capset(new, old, effective, inheritable, permitted);
 }
 
-static inline void security_capset_set(struct task_struct *target,
-                                        kernel_cap_t *effective,
-                                        kernel_cap_t *inheritable,
-                                        kernel_cap_t *permitted)
+static inline int security_capable(struct task_struct *tsk, int cap)
 {
-        cap_capset_set(target, effective, inheritable, permitted);
+        return cap_capable(tsk, cap, SECURITY_CAP_AUDIT);
 }
 
-static inline int security_capable(struct task_struct *tsk, int cap)
+static inline int security_capable_noaudit(struct task_struct *tsk, int cap)
 {
-        return cap_capable(tsk, cap);
+        return cap_capable(tsk, cap, SECURITY_CAP_NOAUDIT);
 }
 
 static inline int security_acct(struct file *file)
@@ -1835,32 +1814,22 @@ static inline int security_vm_enough_memory_kern(long pages)
         return cap_vm_enough_memory(current->mm, pages);
 }
 
-static inline int security_bprm_alloc(struct linux_binprm *bprm)
-{
-        return 0;
-}
-
-static inline void security_bprm_free(struct linux_binprm *bprm)
-{ }
-
-static inline void security_bprm_apply_creds(struct linux_binprm *bprm, int unsafe)
+static inline int security_bprm_set_creds(struct linux_binprm *bprm)
 {
-        cap_bprm_apply_creds(bprm, unsafe);
+        return cap_bprm_set_creds(bprm);
 }
 
-static inline void security_bprm_post_apply_creds(struct linux_binprm *bprm)
+static inline int security_bprm_check(struct linux_binprm *bprm)
 {
-        return;
+        return 0;
 }
 
-static inline int security_bprm_set(struct linux_binprm *bprm)
+static inline void security_bprm_committing_creds(struct linux_binprm *bprm)
 {
-        return cap_bprm_set_security(bprm);
 }
 
-static inline int security_bprm_check(struct linux_binprm *bprm)
+static inline void security_bprm_committed_creds(struct linux_binprm *bprm)
 {
-        return 0;
 }
 
 static inline int security_bprm_secureexec(struct linux_binprm *bprm)
@@ -1881,7 +1850,7 @@ static inline int security_sb_copy_data(char *orig, char *copy)
         return 0;
 }
 
-static inline int security_sb_kern_mount(struct super_block *sb, void *data)
+static inline int security_sb_kern_mount(struct super_block *sb, int flags, void *data)
 {
         return 0;
 }
@@ -2177,7 +2146,8 @@ static inline int security_file_receive(struct file *file)
         return 0;
 }
 
-static inline int security_dentry_open(struct file *file)
+static inline int security_dentry_open(struct file *file,
+                                       const struct cred *cred)
 {
         return 0;
 }
@@ -2187,13 +2157,31 @@ static inline int security_task_create(unsigned long clone_flags)
         return 0;
 }
 
-static inline int security_task_alloc(struct task_struct *p)
+static inline void security_cred_free(struct cred *cred)
+{ }
+
+static inline int security_prepare_creds(struct cred *new,
+                                         const struct cred *old,
+                                         gfp_t gfp)
 {
         return 0;
 }
 
-static inline void security_task_free(struct task_struct *p)
-{ }
+static inline void security_commit_creds(struct cred *new,
+                                         const struct cred *old)
+{
+}
+
+static inline int security_kernel_act_as(struct cred *cred, u32 secid)
+{
+        return 0;
+}
+
+static inline int security_kernel_create_files_as(struct cred *cred,
+                                                  struct inode *inode)
+{
+        return 0;
+}
 
 static inline int security_task_setuid(uid_t id0, uid_t id1, uid_t id2,
                                        int flags)
@@ -2201,10 +2189,11 @@ static inline int security_task_setuid(uid_t id0, uid_t id1, uid_t id2,
         return 0;
 }
 
-static inline int security_task_post_setuid(uid_t old_ruid, uid_t old_euid,
-                                            uid_t old_suid, int flags)
+static inline int security_task_fix_setuid(struct cred *new,
+                                           const struct cred *old,
+                                           int flags)
 {
-        return cap_task_post_setuid(old_ruid, old_euid, old_suid, flags);
+        return cap_task_fix_setuid(new, old, flags);
 }
 
 static inline int security_task_setgid(gid_t id0, gid_t id1, gid_t id2,
@@ -2291,14 +2280,9 @@ static inline int security_task_wait(struct task_struct *p)
 static inline int security_task_prctl(int option, unsigned long arg2,
                                       unsigned long arg3,
                                       unsigned long arg4,
-                                      unsigned long arg5, long *rc_p)
-{
-        return cap_task_prctl(option, arg2, arg3, arg3, arg5, rc_p);
-}
-
-static inline void security_task_reparent_to_init(struct task_struct *p)
+                                      unsigned long arg5)
 {
-        cap_task_reparent_to_init(p);
+        return cap_task_prctl(option, arg2, arg3, arg3, arg5);
 }
 
 static inline void security_task_to_inode(struct task_struct *p, struct inode *inode)
@@ -2724,16 +2708,16 @@ static inline void security_skb_classify_flow(struct sk_buff *skb, struct flowi
 #ifdef CONFIG_KEYS
 #ifdef CONFIG_SECURITY
 
-int security_key_alloc(struct key *key, struct task_struct *tsk, unsigned long flags);
+int security_key_alloc(struct key *key, const struct cred *cred, unsigned long flags);
 void security_key_free(struct key *key);
 int security_key_permission(key_ref_t key_ref,
-                            struct task_struct *context, key_perm_t perm);
+                            const struct cred *cred, key_perm_t perm);
 int security_key_getsecurity(struct key *key, char **_buffer);
 
 #else
 
 static inline int security_key_alloc(struct key *key,
-                                     struct task_struct *tsk,
+                                     const struct cred *cred,
                                      unsigned long flags)
 {
         return 0;
@@ -2744,7 +2728,7 @@ static inline void security_key_free(struct key *key)
 }
 
 static inline int security_key_permission(key_ref_t key_ref,
-                                          struct task_struct *context,
+                                          const struct cred *cred,
                                           key_perm_t perm)
 {
         return 0;
diff --git a/include/linux/tty.h b/include/linux/tty.h
index 3b8121d4e36f..580700f20a1c 100644
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -442,6 +442,7 @@ extern void tty_audit_add_data(struct tty_struct *tty, unsigned char *data,
                                size_t size);
 extern void tty_audit_exit(void);
 extern void tty_audit_fork(struct signal_struct *sig);
+extern void tty_audit_tiocsti(struct tty_struct *tty, char ch);
 extern void tty_audit_push(struct tty_struct *tty);
 extern void tty_audit_push_task(struct task_struct *tsk,
                                         uid_t loginuid, u32 sessionid);
@@ -450,6 +451,9 @@ static inline void tty_audit_add_data(struct tty_struct *tty,
                                       unsigned char *data, size_t size)
 {
 }
+static inline void tty_audit_tiocsti(struct tty_struct *tty, char ch)
+{
+}
 static inline void tty_audit_exit(void)
 {
 }
diff --git a/include/linux/user_namespace.h b/include/linux/user_namespace.h
index b5f41d4c2eec..315bcd375224 100644
--- a/include/linux/user_namespace.h
+++ b/include/linux/user_namespace.h
@@ -12,7 +12,7 @@
 struct user_namespace {
         struct kref             kref;
         struct hlist_head       uidhash_table[UIDHASH_SZ];
-        struct user_struct      *root_user;
+        struct user_struct      *creator;
 };
 
 extern struct user_namespace init_user_ns;
@@ -26,8 +26,7 @@ static inline struct user_namespace *get_user_ns(struct user_namespace *ns)
         return ns;
 }
 
-extern struct user_namespace *copy_user_ns(int flags,
-                                           struct user_namespace *old_ns);
+extern int create_user_ns(struct cred *new);
 extern void free_user_ns(struct kref *kref);
 
 static inline void put_user_ns(struct user_namespace *ns)
@@ -43,13 +42,9 @@ static inline struct user_namespace *get_user_ns(struct user_namespace *ns)
         return &init_user_ns;
 }
 
-static inline struct user_namespace *copy_user_ns(int flags,
-                                                  struct user_namespace *old_ns)
+static inline int create_user_ns(struct cred *new)
 {
-        if (flags & CLONE_NEWUSER)
-                return ERR_PTR(-EINVAL);
-
-        return old_ns;
+        return -EINVAL;
 }
 
 static inline void put_user_ns(struct user_namespace *ns)
diff --git a/include/net/scm.h b/include/net/scm.h
index 33e9986beb86..f45bb6eca7d4 100644
--- a/include/net/scm.h
+++ b/include/net/scm.h
@@ -55,8 +55,8 @@ static __inline__ int scm_send(struct socket *sock, struct msghdr *msg,
                                struct scm_cookie *scm)
 {
         struct task_struct *p = current;
-        scm->creds.uid = p->uid;
-        scm->creds.gid = p->gid;
+        scm->creds.uid = current_uid();
+        scm->creds.gid = current_gid();
         scm->creds.pid = task_tgid_vnr(p);
         scm->fp = NULL;
         scm->seq = 0;
diff --git a/init/main.c b/init/main.c
index 7e117a231af1..db843bff5732 100644
--- a/init/main.c
+++ b/init/main.c
@@ -669,6 +669,7 @@ asmlinkage void __init start_kernel(void)
                 efi_enter_virtual_mode();
 #endif
         thread_info_cache_init();
+        cred_init();
         fork_init(num_physpages);
         proc_caches_init();
         buffer_init();
diff --git a/ipc/mqueue.c b/ipc/mqueue.c
index 68eb857cfdea..d9393f8e4c3e 100644
--- a/ipc/mqueue.c
+++ b/ipc/mqueue.c
@@ -112,13 +112,14 @@ static inline struct mqueue_inode_info *MQUEUE_I(struct inode *inode)
 static struct inode *mqueue_get_inode(struct super_block *sb, int mode,
                                                         struct mq_attr *attr)
 {
+        struct user_struct *u = current_user();
         struct inode *inode;
 
         inode = new_inode(sb);
         if (inode) {
                 inode->i_mode = mode;
-                inode->i_uid = current->fsuid;
-                inode->i_gid = current->fsgid;
+                inode->i_uid = current_fsuid();
+                inode->i_gid = current_fsgid();
                 inode->i_blocks = 0;
                 inode->i_mtime = inode->i_ctime = inode->i_atime =
                                 CURRENT_TIME;
@@ -126,7 +127,6 @@ static struct inode *mqueue_get_inode(struct super_block *sb, int mode,
                 if (S_ISREG(mode)) {
                         struct mqueue_inode_info *info;
                         struct task_struct *p = current;
-                        struct user_struct *u = p->user;
                         unsigned long mq_bytes, mq_msg_tblsz;
 
                         inode->i_fop = &mqueue_file_operations;
@@ -507,7 +507,7 @@ static void __do_notify(struct mqueue_inode_info *info)
                         sig_i.si_code = SI_MESGQ;
                         sig_i.si_value = info->notify.sigev_value;
                         sig_i.si_pid = task_tgid_vnr(current);
-                        sig_i.si_uid = current->uid;
+                        sig_i.si_uid = current_uid();
 
                         kill_pid_info(info->notify.sigev_signo,
                                       &sig_i, info->notify_owner);
@@ -594,6 +594,7 @@ static int mq_attr_ok(struct mq_attr *attr)
 static struct file *do_create(struct dentry *dir, struct dentry *dentry,
                         int oflag, mode_t mode, struct mq_attr __user *u_attr)
 {
+        const struct cred *cred = current_cred();
         struct mq_attr attr;
         struct file *result;
         int ret;
@@ -618,7 +619,7 @@ static struct file *do_create(struct dentry *dir, struct dentry *dentry,
         if (ret)
                 goto out_drop_write;
 
-        result = dentry_open(dentry, mqueue_mnt, oflag);
+        result = dentry_open(dentry, mqueue_mnt, oflag, cred);
         /*
          * dentry_open() took a persistent mnt_want_write(),
          * so we can now drop this one.
@@ -637,8 +638,10 @@ out:
 /* Opens existing queue */
 static struct file *do_open(struct dentry *dentry, int oflag)
 {
-static int oflag2acc[O_ACCMODE] = { MAY_READ, MAY_WRITE,
-                                        MAY_READ | MAY_WRITE };
+        const struct cred *cred = current_cred();
+
+        static const int oflag2acc[O_ACCMODE] = { MAY_READ, MAY_WRITE,
+                                                  MAY_READ | MAY_WRITE };
 
         if ((oflag & O_ACCMODE) == (O_RDWR | O_WRONLY)) {
                 dput(dentry);
@@ -652,7 +655,7 @@ static int oflag2acc[O_ACCMODE] = { MAY_READ, MAY_WRITE,
                 return ERR_PTR(-EACCES);
         }
 
-        return dentry_open(dentry, mqueue_mnt, oflag);
+        return dentry_open(dentry, mqueue_mnt, oflag, cred);
 }
 
 asmlinkage long sys_mq_open(const char __user *u_name, int oflag, mode_t mode,
diff --git a/ipc/shm.c b/ipc/shm.c
index 867e5d6a55c2..38a055758a9b 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -366,7 +366,7 @@ static int newseg(struct ipc_namespace *ns, struct ipc_params *params)
         if (shmflg & SHM_HUGETLB) {
                 /* hugetlb_file_setup takes care of mlock user accounting */
                 file = hugetlb_file_setup(name, size);
-                shp->mlock_user = current->user;
+                shp->mlock_user = current_user();
         } else {
                 int acctflag = VM_ACCOUNT;
                 /*
@@ -752,9 +752,10 @@ asmlinkage long sys_shmctl(int shmid, int cmd, struct shmid_ds __user *buf)
                         goto out_unlock;
 
                 if (!capable(CAP_IPC_LOCK)) {
+                        uid_t euid = current_euid();
                         err = -EPERM;
-                        if (current->euid != shp->shm_perm.uid &&
-                            current->euid != shp->shm_perm.cuid)
+                        if (euid != shp->shm_perm.uid &&
+                            euid != shp->shm_perm.cuid)
                                 goto out_unlock;
                         if (cmd == SHM_LOCK &&
                             !current->signal->rlim[RLIMIT_MEMLOCK].rlim_cur)
@@ -766,7 +767,7 @@ asmlinkage long sys_shmctl(int shmid, int cmd, struct shmid_ds __user *buf)
                         goto out_unlock;
                 
                 if(cmd==SHM_LOCK) {
-                        struct user_struct * user = current->user;
+                        struct user_struct *user = current_user();
                         if (!is_file_hugepages(shp->shm_file)) {
                                 err = shmem_lock(shp->shm_file, 1, user);
                                 if (!err && !(shp->shm_perm.mode & SHM_LOCKED)){
diff --git a/ipc/util.c b/ipc/util.c
index 361fd1c96fcf..5a1808c774a2 100644
--- a/ipc/util.c
+++ b/ipc/util.c
@@ -258,6 +258,8 @@ int ipc_get_maxid(struct ipc_ids *ids)
  
 int ipc_addid(struct ipc_ids* ids, struct kern_ipc_perm* new, int size)
 {
+        uid_t euid;
+        gid_t egid;
         int id, err;
 
         if (size > IPCMNI)
@@ -280,8 +282,9 @@ int ipc_addid(struct ipc_ids* ids, struct kern_ipc_perm* new, int size)
 
         ids->in_use++;
 
-        new->cuid = new->uid = current->euid;
-        new->gid = new->cgid = current->egid;
+        current_euid_egid(&euid, &egid);
+        new->cuid = new->uid = euid;
+        new->gid = new->cgid = egid;
 
         new->seq = ids->seq++;
         if(ids->seq > ids->seq_max)
@@ -620,13 +623,15 @@ void ipc_rcu_putref(void *ptr)
  
 int ipcperms (struct kern_ipc_perm *ipcp, short flag)
 {       /* flag will most probably be 0 or S_...UGO from <linux/stat.h> */
+        uid_t euid = current_euid();
         int requested_mode, granted_mode, err;
 
         if (unlikely((err = audit_ipc_obj(ipcp))))
                 return err;
         requested_mode = (flag >> 6) | (flag >> 3) | flag;
         granted_mode = ipcp->mode;
-        if (current->euid == ipcp->cuid || current->euid == ipcp->uid)
+        if (euid == ipcp->cuid ||
+            euid == ipcp->uid)
                 granted_mode >>= 6;
         else if (in_group_p(ipcp->cgid) || in_group_p(ipcp->gid))
                 granted_mode >>= 3;
@@ -788,6 +793,7 @@ struct kern_ipc_perm *ipcctl_pre_down(struct ipc_ids *ids, int id, int cmd,
                                       struct ipc64_perm *perm, int extra_perm)
 {
         struct kern_ipc_perm *ipcp;
+        uid_t euid;
         int err;
 
         down_write(&ids->rw_mutex);
@@ -807,8 +813,10 @@ struct kern_ipc_perm *ipcctl_pre_down(struct ipc_ids *ids, int id, int cmd,
                 if (err)
                         goto out_unlock;
         }
-        if (current->euid == ipcp->cuid ||
-            current->euid == ipcp->uid || capable(CAP_SYS_ADMIN))
+
+        euid = current_euid();
+        if (euid == ipcp->cuid ||
+            euid == ipcp->uid  || capable(CAP_SYS_ADMIN))
                 return ipcp;
 
         err = -EPERM;
diff --git a/kernel/Makefile b/kernel/Makefile
index 19fad003b19d..b1e6b6625ea2 100644
--- a/kernel/Makefile
+++ b/kernel/Makefile
@@ -9,7 +9,7 @@ obj-y     = sched.o fork.o exec_domain.o panic.o printk.o \
             rcupdate.o extable.o params.o posix-timers.o \
             kthread.o wait.o kfifo.o sys_ni.o posix-cpu-timers.o mutex.o \
             hrtimer.o rwsem.o nsproxy.o srcu.o semaphore.o \
-            notifier.o ksysfs.o pm_qos_params.o sched_clock.o
+            notifier.o ksysfs.o pm_qos_params.o sched_clock.o cred.o
 
 ifdef CONFIG_FUNCTION_TRACER
 # Do not trace debug files and internal ftrace files
diff --git a/kernel/acct.c b/kernel/acct.c
index f6006a60df5d..d57b7cbb98b6 100644
--- a/kernel/acct.c
+++ b/kernel/acct.c
@@ -530,15 +530,14 @@ static void do_acct_process(struct bsd_acct_struct *acct,
         do_div(elapsed, AHZ);
         ac.ac_btime = get_seconds() - elapsed;
         /* we really need to bite the bullet and change layout */
-        ac.ac_uid = current->uid;
-        ac.ac_gid = current->gid;
+        current_uid_gid(&ac.ac_uid, &ac.ac_gid);
 #if ACCT_VERSION==2
         ac.ac_ahz = AHZ;
 #endif
 #if ACCT_VERSION==1 || ACCT_VERSION==2
         /* backward-compatible 16 bit fields */
-        ac.ac_uid16 = current->uid;
-        ac.ac_gid16 = current->gid;
+        ac.ac_uid16 = ac.ac_uid;
+        ac.ac_gid16 = ac.ac_gid;
 #endif
 #if ACCT_VERSION==3
         ac.ac_pid = task_tgid_nr_ns(current, ns);
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index 2a3f0afc4d2a..4819f3711973 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -65,6 +65,7 @@
 #include <linux/highmem.h>
 #include <linux/syscalls.h>
 #include <linux/inotify.h>
+#include <linux/capability.h>
 
 #include "audit.h"
 
@@ -84,6 +85,15 @@ int audit_n_rules;
 /* determines whether we collect data for signals sent */
 int audit_signals;
 
+struct audit_cap_data {
+        kernel_cap_t            permitted;
+        kernel_cap_t            inheritable;
+        union {
+                unsigned int    fE;             /* effective bit of a file capability */
+                kernel_cap_t    effective;      /* effective set of a process */
+        };
+};
+
 /* When fs/namei.c:getname() is called, we store the pointer in name and
  * we don't let putname() free it (instead we free all of the saved
  * pointers at syscall exit time).
@@ -100,6 +110,8 @@ struct audit_names {
         gid_t           gid;
         dev_t           rdev;
         u32             osid;
+        struct audit_cap_data fcap;
+        unsigned int    fcap_ver;
 };
 
 struct audit_aux_data {
@@ -184,6 +196,20 @@ struct audit_aux_data_pids {
         int                     pid_count;
 };
 
+struct audit_aux_data_bprm_fcaps {
+        struct audit_aux_data   d;
+        struct audit_cap_data   fcap;
+        unsigned int            fcap_ver;
+        struct audit_cap_data   old_pcap;
+        struct audit_cap_data   new_pcap;
+};
+
+struct audit_aux_data_capset {
+        struct audit_aux_data   d;
+        pid_t                   pid;
+        struct audit_cap_data   cap;
+};
+
 struct audit_tree_refs {
         struct audit_tree_refs *next;
         struct audit_chunk *c[31];
@@ -421,6 +447,7 @@ static int audit_filter_rules(struct task_struct *tsk,
                               struct audit_names *name,
                               enum audit_state *state)
 {
+        const struct cred *cred = get_task_cred(tsk);
         int i, j, need_sid = 1;
         u32 sid;
 
@@ -440,28 +467,28 @@ static int audit_filter_rules(struct task_struct *tsk,
                         }
                         break;
                 case AUDIT_UID:
-                        result = audit_comparator(tsk->uid, f->op, f->val);
+                        result = audit_comparator(cred->uid, f->op, f->val);
                         break;
                 case AUDIT_EUID:
-                        result = audit_comparator(tsk->euid, f->op, f->val);
+                        result = audit_comparator(cred->euid, f->op, f->val);
                         break;
                 case AUDIT_SUID:
-                        result = audit_comparator(tsk->suid, f->op, f->val);
+                        result = audit_comparator(cred->suid, f->op, f->val);
                         break;
                 case AUDIT_FSUID:
-                        result = audit_comparator(tsk->fsuid, f->op, f->val);
+                        result = audit_comparator(cred->fsuid, f->op, f->val);
                         break;
                 case AUDIT_GID:
-                        result = audit_comparator(tsk->gid, f->op, f->val);
+                        result = audit_comparator(cred->gid, f->op, f->val);
                         break;
                 case AUDIT_EGID:
-                        result = audit_comparator(tsk->egid, f->op, f->val);
+                        result = audit_comparator(cred->egid, f->op, f->val);
                         break;
                 case AUDIT_SGID:
-                        result = audit_comparator(tsk->sgid, f->op, f->val);
+                        result = audit_comparator(cred->sgid, f->op, f->val);
                         break;
                 case AUDIT_FSGID:
-                        result = audit_comparator(tsk->fsgid, f->op, f->val);
+                        result = audit_comparator(cred->fsgid, f->op, f->val);
                         break;
                 case AUDIT_PERS:
                         result = audit_comparator(tsk->personality, f->op, f->val);
@@ -615,8 +642,10 @@ static int audit_filter_rules(struct task_struct *tsk,
                         break;
                 }
 
-                if (!result)
+                if (!result) {
+                        put_cred(cred);
                         return 0;
+                }
         }
         if (rule->filterkey && ctx)
                 ctx->filterkey = kstrdup(rule->filterkey, GFP_ATOMIC);
@@ -624,6 +653,7 @@ static int audit_filter_rules(struct task_struct *tsk,
         case AUDIT_NEVER:    *state = AUDIT_DISABLED;       break;
         case AUDIT_ALWAYS:   *state = AUDIT_RECORD_CONTEXT; break;
         }
+        put_cred(cred);
         return 1;
 }
 
@@ -1171,8 +1201,38 @@ static void audit_log_execve_info(struct audit_context *context,
         kfree(buf);
 }
 
+static void audit_log_cap(struct audit_buffer *ab, char *prefix, kernel_cap_t *cap)
+{
+        int i;
+
+        audit_log_format(ab, " %s=", prefix);
+        CAP_FOR_EACH_U32(i) {
+                audit_log_format(ab, "%08x", cap->cap[(_KERNEL_CAPABILITY_U32S-1) - i]);
+        }
+}
+
+static void audit_log_fcaps(struct audit_buffer *ab, struct audit_names *name)
+{
+        kernel_cap_t *perm = &name->fcap.permitted;
+        kernel_cap_t *inh = &name->fcap.inheritable;
+        int log = 0;
+
+        if (!cap_isclear(*perm)) {
+                audit_log_cap(ab, "cap_fp", perm);
+                log = 1;
+        }
+        if (!cap_isclear(*inh)) {
+                audit_log_cap(ab, "cap_fi", inh);
+                log = 1;
+        }
+
+        if (log)
+                audit_log_format(ab, " cap_fe=%d cap_fver=%x", name->fcap.fE, name->fcap_ver);
+}
+
 static void audit_log_exit(struct audit_context *context, struct task_struct *tsk)
 {
+        const struct cred *cred;
         int i, call_panic = 0;
         struct audit_buffer *ab;
         struct audit_aux_data *aux;
@@ -1182,14 +1242,15 @@ static void audit_log_exit(struct audit_context *context, struct task_struct *ts
         context->pid = tsk->pid;
         if (!context->ppid)
                 context->ppid = sys_getppid();
-        context->uid = tsk->uid;
-        context->gid = tsk->gid;
-        context->euid = tsk->euid;
-        context->suid = tsk->suid;
-        context->fsuid = tsk->fsuid;
-        context->egid = tsk->egid;
-        context->sgid = tsk->sgid;
-        context->fsgid = tsk->fsgid;
+        cred = current_cred();
+        context->uid   = cred->uid;
+        context->gid   = cred->gid;
+        context->euid  = cred->euid;
+        context->suid  = cred->suid;
+        context->fsuid = cred->fsuid;
+        context->egid  = cred->egid;
+        context->sgid  = cred->sgid;
+        context->fsgid = cred->fsgid;
         context->personality = tsk->personality;
 
         ab = audit_log_start(context, GFP_KERNEL, AUDIT_SYSCALL);
@@ -1334,6 +1395,28 @@ static void audit_log_exit(struct audit_context *context, struct task_struct *ts
                         audit_log_format(ab, "fd0=%d fd1=%d", axs->fd[0], axs->fd[1]);
                         break; }
 
+                case AUDIT_BPRM_FCAPS: {
+                        struct audit_aux_data_bprm_fcaps *axs = (void *)aux;
+                        audit_log_format(ab, "fver=%x", axs->fcap_ver);
+                        audit_log_cap(ab, "fp", &axs->fcap.permitted);
+                        audit_log_cap(ab, "fi", &axs->fcap.inheritable);
+                        audit_log_format(ab, " fe=%d", axs->fcap.fE);
+                        audit_log_cap(ab, "old_pp", &axs->old_pcap.permitted);
+                        audit_log_cap(ab, "old_pi", &axs->old_pcap.inheritable);
+                        audit_log_cap(ab, "old_pe", &axs->old_pcap.effective);
+                        audit_log_cap(ab, "new_pp", &axs->new_pcap.permitted);
+                        audit_log_cap(ab, "new_pi", &axs->new_pcap.inheritable);
+                        audit_log_cap(ab, "new_pe", &axs->new_pcap.effective);
+                        break; }
+
+                case AUDIT_CAPSET: {
+                        struct audit_aux_data_capset *axs = (void *)aux;
+                        audit_log_format(ab, "pid=%d", axs->pid);
+                        audit_log_cap(ab, "cap_pi", &axs->cap.inheritable);
+                        audit_log_cap(ab, "cap_pp", &axs->cap.permitted);
+                        audit_log_cap(ab, "cap_pe", &axs->cap.effective);
+                        break; }
+
                 }
                 audit_log_end(ab);
         }
@@ -1421,6 +1504,8 @@ static void audit_log_exit(struct audit_context *context, struct task_struct *ts
                         }
                 }
 
+                audit_log_fcaps(ab, n);
+
                 audit_log_end(ab);
         }
 
@@ -1802,8 +1887,36 @@ static int audit_inc_name_count(struct audit_context *context,
         return 0;
 }
 
+
+static inline int audit_copy_fcaps(struct audit_names *name, const struct dentry *dentry)
+{
+        struct cpu_vfs_cap_data caps;
+        int rc;
+
+        memset(&name->fcap.permitted, 0, sizeof(kernel_cap_t));
+        memset(&name->fcap.inheritable, 0, sizeof(kernel_cap_t));
+        name->fcap.fE = 0;
+        name->fcap_ver = 0;
+
+        if (!dentry)
+                return 0;
+
+        rc = get_vfs_caps_from_disk(dentry, &caps);
+        if (rc)
+                return rc;
+
+        name->fcap.permitted = caps.permitted;
+        name->fcap.inheritable = caps.inheritable;
+        name->fcap.fE = !!(caps.magic_etc & VFS_CAP_FLAGS_EFFECTIVE);
+        name->fcap_ver = (caps.magic_etc & VFS_CAP_REVISION_MASK) >> VFS_CAP_REVISION_SHIFT;
+
+        return 0;
+}
+
+
 /* Copy inode data into an audit_names. */
-static void audit_copy_inode(struct audit_names *name, const struct inode *inode)
+static void audit_copy_inode(struct audit_names *name, const struct dentry *dentry,
+                             const struct inode *inode)
 {
         name->ino   = inode->i_ino;
         name->dev   = inode->i_sb->s_dev;
@@ -1812,6 +1925,7 @@ static void audit_copy_inode(struct audit_names *name, const struct inode *inode
         name->gid   = inode->i_gid;
         name->rdev  = inode->i_rdev;
         security_inode_getsecid(inode, &name->osid);
+        audit_copy_fcaps(name, dentry);
 }
 
 /**
@@ -1846,7 +1960,7 @@ void __audit_inode(const char *name, const struct dentry *dentry)
                 context->names[idx].name = NULL;
         }
         handle_path(dentry);
-        audit_copy_inode(&context->names[idx], inode);
+        audit_copy_inode(&context->names[idx], dentry, inode);
 }
 
 /**
@@ -1907,7 +2021,7 @@ void __audit_inode_child(const char *dname, const struct dentry *dentry,
                 if (!strcmp(dname, n->name) ||
                      !audit_compare_dname_path(dname, n->name, &dirlen)) {
                         if (inode)
-                                audit_copy_inode(n, inode);
+                                audit_copy_inode(n, NULL, inode);
                         else
                                 n->ino = (unsigned long)-1;
                         found_child = n->name;
@@ -1921,7 +2035,7 @@ add_names:
                         return;
                 idx = context->name_count - 1;
                 context->names[idx].name = NULL;
-                audit_copy_inode(&context->names[idx], parent);
+                audit_copy_inode(&context->names[idx], NULL, parent);
         }
 
         if (!found_child) {
@@ -1942,7 +2056,7 @@ add_names:
                 }
 
                 if (inode)
-                        audit_copy_inode(&context->names[idx], inode);
+                        audit_copy_inode(&context->names[idx], NULL, inode);
                 else
                         context->names[idx].ino = (unsigned long)-1;
         }
@@ -1996,7 +2110,7 @@ int audit_set_loginuid(struct task_struct *task, uid_t loginuid)
                         audit_log_format(ab, "login pid=%d uid=%u "
                                 "old auid=%u new auid=%u"
                                 " old ses=%u new ses=%u",
-                                task->pid, task->uid,
+                                task->pid, task_uid(task),
                                 task->loginuid, loginuid,
                                 task->sessionid, sessionid);
                         audit_log_end(ab);
@@ -2379,7 +2493,7 @@ void __audit_ptrace(struct task_struct *t)
 
         context->target_pid = t->pid;
         context->target_auid = audit_get_loginuid(t);
-        context->target_uid = t->uid;
+        context->target_uid = task_uid(t);
         context->target_sessionid = audit_get_sessionid(t);
         security_task_getsecid(t, &context->target_sid);
         memcpy(context->target_comm, t->comm, TASK_COMM_LEN);
@@ -2398,6 +2512,7 @@ int __audit_signal_info(int sig, struct task_struct *t)
         struct audit_aux_data_pids *axp;
         struct task_struct *tsk = current;
         struct audit_context *ctx = tsk->audit_context;
+        uid_t uid = current_uid(), t_uid = task_uid(t);
 
         if (audit_pid && t->tgid == audit_pid) {
                 if (sig == SIGTERM || sig == SIGHUP || sig == SIGUSR1 || sig == SIGUSR2) {
@@ -2405,7 +2520,7 @@ int __audit_signal_info(int sig, struct task_struct *t)
                         if (tsk->loginuid != -1)
                                 audit_sig_uid = tsk->loginuid;
                         else
-                                audit_sig_uid = tsk->uid;
+                                audit_sig_uid = uid;
                         security_task_getsecid(tsk, &audit_sig_sid);
                 }
                 if (!audit_signals || audit_dummy_context())
@@ -2417,7 +2532,7 @@ int __audit_signal_info(int sig, struct task_struct *t)
         if (!ctx->target_pid) {
                 ctx->target_pid = t->tgid;
                 ctx->target_auid = audit_get_loginuid(t);
-                ctx->target_uid = t->uid;
+                ctx->target_uid = t_uid;
                 ctx->target_sessionid = audit_get_sessionid(t);
                 security_task_getsecid(t, &ctx->target_sid);
                 memcpy(ctx->target_comm, t->comm, TASK_COMM_LEN);
@@ -2438,7 +2553,7 @@ int __audit_signal_info(int sig, struct task_struct *t)
 
         axp->target_pid[axp->pid_count] = t->tgid;
         axp->target_auid[axp->pid_count] = audit_get_loginuid(t);
-        axp->target_uid[axp->pid_count] = t->uid;
+        axp->target_uid[axp->pid_count] = t_uid;
         axp->target_sessionid[axp->pid_count] = audit_get_sessionid(t);
         security_task_getsecid(t, &axp->target_sid[axp->pid_count]);
         memcpy(axp->target_comm[axp->pid_count], t->comm, TASK_COMM_LEN);
@@ -2448,6 +2563,86 @@ int __audit_signal_info(int sig, struct task_struct *t)
 }
 
 /**
+ * __audit_log_bprm_fcaps - store information about a loading bprm and relevant fcaps
+ * @bprm: pointer to the bprm being processed
+ * @new: the proposed new credentials
+ * @old: the old credentials
+ *
+ * Simply check if the proc already has the caps given by the file and if not
+ * store the priv escalation info for later auditing at the end of the syscall
+ *
+ * -Eric
+ */
+int __audit_log_bprm_fcaps(struct linux_binprm *bprm,
+                           const struct cred *new, const struct cred *old)
+{
+        struct audit_aux_data_bprm_fcaps *ax;
+        struct audit_context *context = current->audit_context;
+        struct cpu_vfs_cap_data vcaps;
+        struct dentry *dentry;
+
+        ax = kmalloc(sizeof(*ax), GFP_KERNEL);
+        if (!ax)
+                return -ENOMEM;
+
+        ax->d.type = AUDIT_BPRM_FCAPS;
+        ax->d.next = context->aux;
+        context->aux = (void *)ax;
+
+        dentry = dget(bprm->file->f_dentry);
+        get_vfs_caps_from_disk(dentry, &vcaps);
+        dput(dentry);
+
+        ax->fcap.permitted = vcaps.permitted;
+        ax->fcap.inheritable = vcaps.inheritable;
+        ax->fcap.fE = !!(vcaps.magic_etc & VFS_CAP_FLAGS_EFFECTIVE);
+        ax->fcap_ver = (vcaps.magic_etc & VFS_CAP_REVISION_MASK) >> VFS_CAP_REVISION_SHIFT;
+
+        ax->old_pcap.permitted   = old->cap_permitted;
+        ax->old_pcap.inheritable = old->cap_inheritable;
+        ax->old_pcap.effective   = old->cap_effective;
+
+        ax->new_pcap.permitted   = new->cap_permitted;
+        ax->new_pcap.inheritable = new->cap_inheritable;
+        ax->new_pcap.effective   = new->cap_effective;
+        return 0;
+}
+
+/**
+ * __audit_log_capset - store information about the arguments to the capset syscall
+ * @pid: target pid of the capset call
+ * @new: the new credentials
+ * @old: the old (current) credentials
+ *
+ * Record the aguments userspace sent to sys_capset for later printing by the
+ * audit system if applicable
+ */
+int __audit_log_capset(pid_t pid,
+                       const struct cred *new, const struct cred *old)
+{
+        struct audit_aux_data_capset *ax;
+        struct audit_context *context = current->audit_context;
+
+        if (likely(!audit_enabled || !context || context->dummy))
+                return 0;
+
+        ax = kmalloc(sizeof(*ax), GFP_KERNEL);
+        if (!ax)
+                return -ENOMEM;
+
+        ax->d.type = AUDIT_CAPSET;
+        ax->d.next = context->aux;
+        context->aux = (void *)ax;
+
+        ax->pid = pid;
+        ax->cap.effective   = new->cap_effective;
+        ax->cap.inheritable = new->cap_effective;
+        ax->cap.permitted   = new->cap_permitted;
+
+        return 0;
+}
+
+/**
  * audit_core_dumps - record information about processes that end abnormally
  * @signr: signal value
  *
@@ -2458,7 +2653,8 @@ void audit_core_dumps(long signr)
 {
         struct audit_buffer *ab;
         u32 sid;
-        uid_t auid = audit_get_loginuid(current);
+        uid_t auid = audit_get_loginuid(current), uid;
+        gid_t gid;
         unsigned int sessionid = audit_get_sessionid(current);
 
         if (!audit_enabled)
@@ -2468,8 +2664,9 @@ void audit_core_dumps(long signr)
                 return;
 
         ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_ANOM_ABEND);
+        current_uid_gid(&uid, &gid);
         audit_log_format(ab, "auid=%u uid=%u gid=%u ses=%u",
-                        auid, current->uid, current->gid, sessionid);
+                         auid, uid, gid, sessionid);
         security_task_getsecid(current, &sid);
         if (sid) {
                 char *ctx = NULL;
diff --git a/kernel/capability.c b/kernel/capability.c
index 33e51e78c2d8..36b4b4daebec 100644
--- a/kernel/capability.c
+++ b/kernel/capability.c
@@ -7,6 +7,7 @@
  * 30 May 2002: Cleanup, Robert M. Love <rml@tech9.net>
  */
 
+#include <linux/audit.h>
 #include <linux/capability.h>
 #include <linux/mm.h>
 #include <linux/module.h>
@@ -14,12 +15,7 @@
 #include <linux/syscalls.h>
 #include <linux/pid_namespace.h>
 #include <asm/uaccess.h>
-
-/*
- * This lock protects task->cap_* for all tasks including current.
- * Locking rule: acquire this prior to tasklist_lock.
- */
-static DEFINE_SPINLOCK(task_capability_lock);
+#include "cred-internals.h"
 
 /*
  * Leveraged for setting/resetting capabilities
@@ -33,6 +29,17 @@ EXPORT_SYMBOL(__cap_empty_set);
 EXPORT_SYMBOL(__cap_full_set);
 EXPORT_SYMBOL(__cap_init_eff_set);
 
+#ifdef CONFIG_SECURITY_FILE_CAPABILITIES
+int file_caps_enabled = 1;
+
+static int __init file_caps_disable(char *str)
+{
+        file_caps_enabled = 0;
+        return 1;
+}
+__setup("no_file_caps", file_caps_disable);
+#endif
+
 /*
  * More recent versions of libcap are available from:
  *
@@ -115,167 +122,12 @@ static int cap_validate_magic(cap_user_header_t header, unsigned *tocopy)
         return 0;
 }
 
-#ifndef CONFIG_SECURITY_FILE_CAPABILITIES
-
-/*
- * Without filesystem capability support, we nominally support one process
- * setting the capabilities of another
- */
-static inline int cap_get_target_pid(pid_t pid, kernel_cap_t *pEp,
-                                     kernel_cap_t *pIp, kernel_cap_t *pPp)
-{
-        struct task_struct *target;
-        int ret;
-
-        spin_lock(&task_capability_lock);
-        read_lock(&tasklist_lock);
-
-        if (pid && pid != task_pid_vnr(current)) {
-                target = find_task_by_vpid(pid);
-                if (!target) {
-                        ret = -ESRCH;
-                        goto out;
-                }
-        } else
-                target = current;
-
-        ret = security_capget(target, pEp, pIp, pPp);
-
-out:
-        read_unlock(&tasklist_lock);
-        spin_unlock(&task_capability_lock);
-
-        return ret;
-}
-
-/*
- * cap_set_pg - set capabilities for all processes in a given process
- * group.  We call this holding task_capability_lock and tasklist_lock.
- */
-static inline int cap_set_pg(int pgrp_nr, kernel_cap_t *effective,
-                             kernel_cap_t *inheritable,
-                             kernel_cap_t *permitted)
-{
-        struct task_struct *g, *target;
-        int ret = -EPERM;
-        int found = 0;
-        struct pid *pgrp;
-
-        spin_lock(&task_capability_lock);
-        read_lock(&tasklist_lock);
-
-        pgrp = find_vpid(pgrp_nr);
-        do_each_pid_task(pgrp, PIDTYPE_PGID, g) {
-                target = g;
-                while_each_thread(g, target) {
-                        if (!security_capset_check(target, effective,
-                                                   inheritable, permitted)) {
-                                security_capset_set(target, effective,
-                                                    inheritable, permitted);
-                                ret = 0;
-                        }
-                        found = 1;
-                }
-        } while_each_pid_task(pgrp, PIDTYPE_PGID, g);
-
-        read_unlock(&tasklist_lock);
-        spin_unlock(&task_capability_lock);
-
-        if (!found)
-                ret = 0;
-        return ret;
-}
-
-/*
- * cap_set_all - set capabilities for all processes other than init
- * and self.  We call this holding task_capability_lock and tasklist_lock.
- */
-static inline int cap_set_all(kernel_cap_t *effective,
-                              kernel_cap_t *inheritable,
-                              kernel_cap_t *permitted)
-{
-        struct task_struct *g, *target;
-        int ret = -EPERM;
-        int found = 0;
-
-        spin_lock(&task_capability_lock);
-        read_lock(&tasklist_lock);
-
-        do_each_thread(g, target) {
-                if (target == current
-                    || is_container_init(target->group_leader))
-                        continue;
-                found = 1;
-                if (security_capset_check(target, effective, inheritable,
-                                          permitted))
-                        continue;
-                ret = 0;
-                security_capset_set(target, effective, inheritable, permitted);
-        } while_each_thread(g, target);
-
-        read_unlock(&tasklist_lock);
-        spin_unlock(&task_capability_lock);
-
-        if (!found)
-                ret = 0;
-
-        return ret;
-}
-
-/*
- * Given the target pid does not refer to the current process we
- * need more elaborate support... (This support is not present when
- * filesystem capabilities are configured.)
- */
-static inline int do_sys_capset_other_tasks(pid_t pid, kernel_cap_t *effective,
-                                            kernel_cap_t *inheritable,
-                                            kernel_cap_t *permitted)
-{
-        struct task_struct *target;
-        int ret;
-
-        if (!capable(CAP_SETPCAP))
-                return -EPERM;
-
-        if (pid == -1)            /* all procs other than current and init */
-                return cap_set_all(effective, inheritable, permitted);
-
-        else if (pid < 0)                    /* all procs in process group */
-                return cap_set_pg(-pid, effective, inheritable, permitted);
-
-        /* target != current */
-        spin_lock(&task_capability_lock);
-        read_lock(&tasklist_lock);
-
-        target = find_task_by_vpid(pid);
-        if (!target)
-                ret = -ESRCH;
-        else {
-                ret = security_capset_check(target, effective, inheritable,
-                                            permitted);
-
-                /* having verified that the proposed changes are legal,
-                   we now put them into effect. */
-                if (!ret)
-                        security_capset_set(target, effective, inheritable,
-                                            permitted);
-        }
-
-        read_unlock(&tasklist_lock);
-        spin_unlock(&task_capability_lock);
-
-        return ret;
-}
-
-#else /* ie., def CONFIG_SECURITY_FILE_CAPABILITIES */
-
 /*
- * If we have configured with filesystem capability support, then the
- * only thing that can change the capabilities of the current process
- * is the current process. As such, we can't be in this code at the
- * same time as we are in the process of setting capabilities in this
- * process. The net result is that we can limit our use of locks to
- * when we are reading the caps of another process.
+ * The only thing that can change the capabilities of the current
+ * process is the current process. As such, we can't be in this code
+ * at the same time as we are in the process of setting capabilities
+ * in this process. The net result is that we can limit our use of
+ * locks to when we are reading the caps of another process.
  */
 static inline int cap_get_target_pid(pid_t pid, kernel_cap_t *pEp,
                                      kernel_cap_t *pIp, kernel_cap_t *pPp)
@@ -285,7 +137,6 @@ static inline int cap_get_target_pid(pid_t pid, kernel_cap_t *pEp,
         if (pid && (pid != task_pid_vnr(current))) {
                 struct task_struct *target;
 
-                spin_lock(&task_capability_lock);
                 read_lock(&tasklist_lock);
 
                 target = find_task_by_vpid(pid);
@@ -295,50 +146,12 @@ static inline int cap_get_target_pid(pid_t pid, kernel_cap_t *pEp,
                         ret = security_capget(target, pEp, pIp, pPp);
 
                 read_unlock(&tasklist_lock);
-                spin_unlock(&task_capability_lock);
         } else
                 ret = security_capget(current, pEp, pIp, pPp);
 
         return ret;
 }
 
-/*
- * With filesystem capability support configured, the kernel does not
- * permit the changing of capabilities in one process by another
- * process. (CAP_SETPCAP has much less broad semantics when configured
- * this way.)
- */
-static inline int do_sys_capset_other_tasks(pid_t pid,
-                                            kernel_cap_t *effective,
-                                            kernel_cap_t *inheritable,
-                                            kernel_cap_t *permitted)
-{
-        return -EPERM;
-}
-
-#endif /* ie., ndef CONFIG_SECURITY_FILE_CAPABILITIES */
-
-/*
- * Atomically modify the effective capabilities returning the original
- * value. No permission check is performed here - it is assumed that the
- * caller is permitted to set the desired effective capabilities.
- */
-kernel_cap_t cap_set_effective(const kernel_cap_t pE_new)
-{
-        kernel_cap_t pE_old;
-
-        spin_lock(&task_capability_lock);
-
-        pE_old = current->cap_effective;
-        current->cap_effective = pE_new;
-
-        spin_unlock(&task_capability_lock);
-
-        return pE_old;
-}
-
-EXPORT_SYMBOL(cap_set_effective);
-
 /**
  * sys_capget - get the capabilities of a given process.
  * @header: pointer to struct that contains capability version and
@@ -366,7 +179,6 @@ asmlinkage long sys_capget(cap_user_header_t header, cap_user_data_t dataptr)
                 return -EINVAL;
 
         ret = cap_get_target_pid(pid, &pE, &pI, &pP);
-
         if (!ret) {
                 struct __user_cap_data_struct kdata[_KERNEL_CAPABILITY_U32S];
                 unsigned i;
@@ -412,16 +224,14 @@ asmlinkage long sys_capget(cap_user_header_t header, cap_user_data_t dataptr)
  * @data: pointer to struct that contains the effective, permitted,
  *      and inheritable capabilities
  *
- * Set capabilities for a given process, all processes, or all
- * processes in a given process group.
+ * Set capabilities for the current process only.  The ability to any other
+ * process(es) has been deprecated and removed.
  *
  * The restrictions on setting capabilities are specified as:
  *
- * [pid is for the 'target' task.  'current' is the calling task.]
- *
- * I: any raised capabilities must be a subset of the (old current) permitted
- * P: any raised capabilities must be a subset of the (old current) permitted
- * E: must be set to a subset of (new target) permitted
+ * I: any raised capabilities must be a subset of the old permitted
+ * P: any raised capabilities must be a subset of the old permitted
+ * E: must be set to a subset of new permitted
  *
  * Returns 0 on success and < 0 on error.
  */
@@ -430,6 +240,7 @@ asmlinkage long sys_capset(cap_user_header_t header, const cap_user_data_t data)
         struct __user_cap_data_struct kdata[_KERNEL_CAPABILITY_U32S];
         unsigned i, tocopy;
         kernel_cap_t inheritable, permitted, effective;
+        struct cred *new;
         int ret;
         pid_t pid;
 
@@ -440,10 +251,13 @@ asmlinkage long sys_capset(cap_user_header_t header, const cap_user_data_t data)
         if (get_user(pid, &header->pid))
                 return -EFAULT;
 
-        if (copy_from_user(&kdata, data, tocopy
-                           * sizeof(struct __user_cap_data_struct))) {
+        /* may only affect current now */
+        if (pid != 0 && pid != task_pid_vnr(current))
+                return -EPERM;
+
+        if (copy_from_user(&kdata, data,
+                           tocopy * sizeof(struct __user_cap_data_struct)))
                 return -EFAULT;
-        }
 
         for (i = 0; i < tocopy; i++) {
                 effective.cap[i] = kdata[i].effective;
@@ -457,32 +271,23 @@ asmlinkage long sys_capset(cap_user_header_t header, const cap_user_data_t data)
                 i++;
         }
 
-        if (pid && (pid != task_pid_vnr(current)))
-                ret = do_sys_capset_other_tasks(pid, &effective, &inheritable,
-                                                &permitted);
-        else {
-                /*
-                 * This lock is required even when filesystem
-                 * capability support is configured - it protects the
-                 * sys_capget() call from returning incorrect data in
-                 * the case that the targeted process is not the
-                 * current one.
-                 */
-                spin_lock(&task_capability_lock);
+        new = prepare_creds();
+        if (!new)
+                return -ENOMEM;
 
-                ret = security_capset_check(current, &effective, &inheritable,
-                                            &permitted);
-                /*
-                 * Having verified that the proposed changes are
-                 * legal, we now put them into effect.
-                 */
-                if (!ret)
-                        security_capset_set(current, &effective, &inheritable,
-                                            &permitted);
-                spin_unlock(&task_capability_lock);
-        }
+        ret = security_capset(new, current_cred(),
+                              &effective, &inheritable, &permitted);
+        if (ret < 0)
+                goto error;
+
+        ret = audit_log_capset(pid, new, current_cred());
+        if (ret < 0)
+                return ret;
 
+        return commit_creds(new);
 
+error:
+        abort_creds(new);
         return ret;
 }
 
@@ -498,6 +303,11 @@ asmlinkage long sys_capset(cap_user_header_t header, const cap_user_data_t data)
  */
 int capable(int cap)
 {
+        if (unlikely(!cap_valid(cap))) {
+                printk(KERN_CRIT "capable() called with invalid cap=%u\n", cap);
+                BUG();
+        }
+
         if (has_capability(current, cap)) {
                 current->flags |= PF_SUPERPRIV;
                 return 1;
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 2606d0fb4e54..48348dde6d81 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -571,8 +571,8 @@ static struct inode *cgroup_new_inode(mode_t mode, struct super_block *sb)
 
         if (inode) {
                 inode->i_mode = mode;
-                inode->i_uid = current->fsuid;
-                inode->i_gid = current->fsgid;
+                inode->i_uid = current_fsuid();
+                inode->i_gid = current_fsgid();
                 inode->i_blocks = 0;
                 inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
                 inode->i_mapping->backing_dev_info = &cgroup_backing_dev_info;
@@ -1280,6 +1280,7 @@ int cgroup_attach_task(struct cgroup *cgrp, struct task_struct *tsk)
 static int attach_task_by_pid(struct cgroup *cgrp, u64 pid)
 {
         struct task_struct *tsk;
+        const struct cred *cred = current_cred(), *tcred;
         int ret;
 
         if (pid) {
@@ -1289,14 +1290,16 @@ static int attach_task_by_pid(struct cgroup *cgrp, u64 pid)
                         rcu_read_unlock();
                         return -ESRCH;
                 }
-                get_task_struct(tsk);
-                rcu_read_unlock();
 
-                if ((current->euid) && (current->euid != tsk->uid)
-                    && (current->euid != tsk->suid)) {
-                        put_task_struct(tsk);
+                tcred = __task_cred(tsk);
+                if (cred->euid &&
+                    cred->euid != tcred->uid &&
+                    cred->euid != tcred->suid) {
+                        rcu_read_unlock();
                         return -EACCES;
                 }
+                get_task_struct(tsk);
+                rcu_read_unlock();
         } else {
                 tsk = current;
                 get_task_struct(tsk);
diff --git a/kernel/cred-internals.h b/kernel/cred-internals.h
new file mode 100644
index 000000000000..2dc4fc2d0bf1
--- /dev/null
+++ b/kernel/cred-internals.h
@@ -0,0 +1,21 @@
+/* Internal credentials stuff
+ *
+ * Copyright (C) 2008 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+
+/*
+ * user.c
+ */
+static inline void sched_switch_user(struct task_struct *p)
+{
+#ifdef CONFIG_USER_SCHED
+        sched_move_task(p);
+#endif  /* CONFIG_USER_SCHED */
+}
+
diff --git a/kernel/cred.c b/kernel/cred.c
new file mode 100644
index 000000000000..ff7bc071991c
--- /dev/null
+++ b/kernel/cred.c
@@ -0,0 +1,588 @@
+/* Task credentials management - see Documentation/credentials.txt
+ *
+ * Copyright (C) 2008 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+#include <linux/module.h>
+#include <linux/cred.h>
+#include <linux/sched.h>
+#include <linux/key.h>
+#include <linux/keyctl.h>
+#include <linux/init_task.h>
+#include <linux/security.h>
+#include <linux/cn_proc.h>
+#include "cred-internals.h"
+
+static struct kmem_cache *cred_jar;
+
+/*
+ * The common credentials for the initial task's thread group
+ */
+#ifdef CONFIG_KEYS
+static struct thread_group_cred init_tgcred = {
+        .usage  = ATOMIC_INIT(2),
+        .tgid   = 0,
+        .lock   = SPIN_LOCK_UNLOCKED,
+};
+#endif
+
+/*
+ * The initial credentials for the initial task
+ */
+struct cred init_cred = {
+        .usage                  = ATOMIC_INIT(4),
+        .securebits             = SECUREBITS_DEFAULT,
+        .cap_inheritable        = CAP_INIT_INH_SET,
+        .cap_permitted          = CAP_FULL_SET,
+        .cap_effective          = CAP_INIT_EFF_SET,
+        .cap_bset               = CAP_INIT_BSET,
+        .user                   = INIT_USER,
+        .group_info             = &init_groups,
+#ifdef CONFIG_KEYS
+        .tgcred                 = &init_tgcred,
+#endif
+};
+
+/*
+ * Dispose of the shared task group credentials
+ */
+#ifdef CONFIG_KEYS
+static void release_tgcred_rcu(struct rcu_head *rcu)
+{
+        struct thread_group_cred *tgcred =
+                container_of(rcu, struct thread_group_cred, rcu);
+
+        BUG_ON(atomic_read(&tgcred->usage) != 0);
+
+        key_put(tgcred->session_keyring);
+        key_put(tgcred->process_keyring);
+        kfree(tgcred);
+}
+#endif
+
+/*
+ * Release a set of thread group credentials.
+ */
+static void release_tgcred(struct cred *cred)
+{
+#ifdef CONFIG_KEYS
+        struct thread_group_cred *tgcred = cred->tgcred;
+
+        if (atomic_dec_and_test(&tgcred->usage))
+                call_rcu(&tgcred->rcu, release_tgcred_rcu);
+#endif
+}
+
+/*
+ * The RCU callback to actually dispose of a set of credentials
+ */
+static void put_cred_rcu(struct rcu_head *rcu)
+{
+        struct cred *cred = container_of(rcu, struct cred, rcu);
+
+        if (atomic_read(&cred->usage) != 0)
+                panic("CRED: put_cred_rcu() sees %p with usage %d\n",
+                      cred, atomic_read(&cred->usage));
+
+        security_cred_free(cred);
+        key_put(cred->thread_keyring);
+        key_put(cred->request_key_auth);
+        release_tgcred(cred);
+        put_group_info(cred->group_info);
+        free_uid(cred->user);
+        kmem_cache_free(cred_jar, cred);
+}
+
+/**
+ * __put_cred - Destroy a set of credentials
+ * @cred: The record to release
+ *
+ * Destroy a set of credentials on which no references remain.
+ */
+void __put_cred(struct cred *cred)
+{
+        BUG_ON(atomic_read(&cred->usage) != 0);
+
+        call_rcu(&cred->rcu, put_cred_rcu);
+}
+EXPORT_SYMBOL(__put_cred);
+
+/**
+ * prepare_creds - Prepare a new set of credentials for modification
+ *
+ * Prepare a new set of task credentials for modification.  A task's creds
+ * shouldn't generally be modified directly, therefore this function is used to
+ * prepare a new copy, which the caller then modifies and then commits by
+ * calling commit_creds().
+ *
+ * Preparation involves making a copy of the objective creds for modification.
+ *
+ * Returns a pointer to the new creds-to-be if successful, NULL otherwise.
+ *
+ * Call commit_creds() or abort_creds() to clean up.
+ */
+struct cred *prepare_creds(void)
+{
+        struct task_struct *task = current;
+        const struct cred *old;
+        struct cred *new;
+
+        BUG_ON(atomic_read(&task->real_cred->usage) < 1);
+
+        new = kmem_cache_alloc(cred_jar, GFP_KERNEL);
+        if (!new)
+                return NULL;
+
+        old = task->cred;
+        memcpy(new, old, sizeof(struct cred));
+
+        atomic_set(&new->usage, 1);
+        get_group_info(new->group_info);
+        get_uid(new->user);
+
+#ifdef CONFIG_KEYS
+        key_get(new->thread_keyring);
+        key_get(new->request_key_auth);
+        atomic_inc(&new->tgcred->usage);
+#endif
+
+#ifdef CONFIG_SECURITY
+        new->security = NULL;
+#endif
+
+        if (security_prepare_creds(new, old, GFP_KERNEL) < 0)
+                goto error;
+        return new;
+
+error:
+        abort_creds(new);
+        return NULL;
+}
+EXPORT_SYMBOL(prepare_creds);
+
+/*
+ * Prepare credentials for current to perform an execve()
+ * - The caller must hold current->cred_exec_mutex
+ */
+struct cred *prepare_exec_creds(void)
+{
+        struct thread_group_cred *tgcred = NULL;
+        struct cred *new;
+
+#ifdef CONFIG_KEYS
+        tgcred = kmalloc(sizeof(*tgcred), GFP_KERNEL);
+        if (!tgcred)
+                return NULL;
+#endif
+
+        new = prepare_creds();
+        if (!new) {
+                kfree(tgcred);
+                return new;
+        }
+
+#ifdef CONFIG_KEYS
+        /* newly exec'd tasks don't get a thread keyring */
+        key_put(new->thread_keyring);
+        new->thread_keyring = NULL;
+
+        /* create a new per-thread-group creds for all this set of threads to
+         * share */
+        memcpy(tgcred, new->tgcred, sizeof(struct thread_group_cred));
+
+        atomic_set(&tgcred->usage, 1);
+        spin_lock_init(&tgcred->lock);
+
+        /* inherit the session keyring; new process keyring */
+        key_get(tgcred->session_keyring);
+        tgcred->process_keyring = NULL;
+
+        release_tgcred(new);
+        new->tgcred = tgcred;
+#endif
+
+        return new;
+}
+
+/*
+ * prepare new credentials for the usermode helper dispatcher
+ */
+struct cred *prepare_usermodehelper_creds(void)
+{
+#ifdef CONFIG_KEYS
+        struct thread_group_cred *tgcred = NULL;
+#endif
+        struct cred *new;
+
+#ifdef CONFIG_KEYS
+        tgcred = kzalloc(sizeof(*new->tgcred), GFP_ATOMIC);
+        if (!tgcred)
+                return NULL;
+#endif
+
+        new = kmem_cache_alloc(cred_jar, GFP_ATOMIC);
+        if (!new)
+                return NULL;
+
+        memcpy(new, &init_cred, sizeof(struct cred));
+
+        atomic_set(&new->usage, 1);
+        get_group_info(new->group_info);
+        get_uid(new->user);
+
+#ifdef CONFIG_KEYS
+        new->thread_keyring = NULL;
+        new->request_key_auth = NULL;
+        new->jit_keyring = KEY_REQKEY_DEFL_DEFAULT;
+
+        atomic_set(&tgcred->usage, 1);
+        spin_lock_init(&tgcred->lock);
+        new->tgcred = tgcred;
+#endif
+
+#ifdef CONFIG_SECURITY
+        new->security = NULL;
+#endif
+        if (security_prepare_creds(new, &init_cred, GFP_ATOMIC) < 0)
+                goto error;
+
+        BUG_ON(atomic_read(&new->usage) != 1);
+        return new;
+
+error:
+        put_cred(new);
+        return NULL;
+}
+
+/*
+ * Copy credentials for the new process created by fork()
+ *
+ * We share if we can, but under some circumstances we have to generate a new
+ * set.
+ *
+ * The new process gets the current process's subjective credentials as its
+ * objective and subjective credentials
+ */
+int copy_creds(struct task_struct *p, unsigned long clone_flags)
+{
+#ifdef CONFIG_KEYS
+        struct thread_group_cred *tgcred;
+#endif
+        struct cred *new;
+        int ret;
+
+        mutex_init(&p->cred_exec_mutex);
+
+        if (
+#ifdef CONFIG_KEYS
+                !p->cred->thread_keyring &&
+#endif
+                clone_flags & CLONE_THREAD
+            ) {
+                p->real_cred = get_cred(p->cred);
+                get_cred(p->cred);
+                atomic_inc(&p->cred->user->processes);
+                return 0;
+        }
+
+        new = prepare_creds();
+        if (!new)
+                return -ENOMEM;
+
+        if (clone_flags & CLONE_NEWUSER) {
+                ret = create_user_ns(new);
+                if (ret < 0)
+                        goto error_put;
+        }
+
+#ifdef CONFIG_KEYS
+        /* new threads get their own thread keyrings if their parent already
+         * had one */
+        if (new->thread_keyring) {
+                key_put(new->thread_keyring);
+                new->thread_keyring = NULL;
+                if (clone_flags & CLONE_THREAD)
+                        install_thread_keyring_to_cred(new);
+        }
+
+        /* we share the process and session keyrings between all the threads in
+         * a process - this is slightly icky as we violate COW credentials a
+         * bit */
+        if (!(clone_flags & CLONE_THREAD)) {
+                tgcred = kmalloc(sizeof(*tgcred), GFP_KERNEL);
+                if (!tgcred) {
+                        ret = -ENOMEM;
+                        goto error_put;
+                }
+                atomic_set(&tgcred->usage, 1);
+                spin_lock_init(&tgcred->lock);
+                tgcred->process_keyring = NULL;
+                tgcred->session_keyring = key_get(new->tgcred->session_keyring);
+
+                release_tgcred(new);
+                new->tgcred = tgcred;
+        }
+#endif
+
+        atomic_inc(&new->user->processes);
+        p->cred = p->real_cred = get_cred(new);
+        return 0;
+
+error_put:
+        put_cred(new);
+        return ret;
+}
+
+/**
+ * commit_creds - Install new credentials upon the current task
+ * @new: The credentials to be assigned
+ *
+ * Install a new set of credentials to the current task, using RCU to replace
+ * the old set.  Both the objective and the subjective credentials pointers are
+ * updated.  This function may not be called if the subjective credentials are
+ * in an overridden state.
+ *
+ * This function eats the caller's reference to the new credentials.
+ *
+ * Always returns 0 thus allowing this function to be tail-called at the end
+ * of, say, sys_setgid().
+ */
+int commit_creds(struct cred *new)
+{
+        struct task_struct *task = current;
+        const struct cred *old;
+
+        BUG_ON(task->cred != task->real_cred);
+        BUG_ON(atomic_read(&task->real_cred->usage) < 2);
+        BUG_ON(atomic_read(&new->usage) < 1);
+
+        old = task->real_cred;
+        security_commit_creds(new, old);
+
+        get_cred(new); /* we will require a ref for the subj creds too */
+
+        /* dumpability changes */
+        if (old->euid != new->euid ||
+            old->egid != new->egid ||
+            old->fsuid != new->fsuid ||
+            old->fsgid != new->fsgid ||
+            !cap_issubset(new->cap_permitted, old->cap_permitted)) {
+                set_dumpable(task->mm, suid_dumpable);
+                task->pdeath_signal = 0;
+                smp_wmb();
+        }
+
+        /* alter the thread keyring */
+        if (new->fsuid != old->fsuid)
+                key_fsuid_changed(task);
+        if (new->fsgid != old->fsgid)
+                key_fsgid_changed(task);
+
+        /* do it
+         * - What if a process setreuid()'s and this brings the
+         *   new uid over his NPROC rlimit?  We can check this now
+         *   cheaply with the new uid cache, so if it matters
+         *   we should be checking for it.  -DaveM
+         */
+        if (new->user != old->user)
+                atomic_inc(&new->user->processes);
+        rcu_assign_pointer(task->real_cred, new);
+        rcu_assign_pointer(task->cred, new);
+        if (new->user != old->user)
+                atomic_dec(&old->user->processes);
+
+        sched_switch_user(task);
+
+        /* send notifications */
+        if (new->uid   != old->uid  ||
+            new->euid  != old->euid ||
+            new->suid  != old->suid ||
+            new->fsuid != old->fsuid)
+                proc_id_connector(task, PROC_EVENT_UID);
+
+        if (new->gid   != old->gid  ||
+            new->egid  != old->egid ||
+            new->sgid  != old->sgid ||
+            new->fsgid != old->fsgid)
+                proc_id_connector(task, PROC_EVENT_GID);
+
+        /* release the old obj and subj refs both */
+        put_cred(old);
+        put_cred(old);
+        return 0;
+}
+EXPORT_SYMBOL(commit_creds);
+
+/**
+ * abort_creds - Discard a set of credentials and unlock the current task
+ * @new: The credentials that were going to be applied
+ *
+ * Discard a set of credentials that were under construction and unlock the
+ * current task.
+ */
+void abort_creds(struct cred *new)
+{
+        BUG_ON(atomic_read(&new->usage) < 1);
+        put_cred(new);
+}
+EXPORT_SYMBOL(abort_creds);
+
+/**
+ * override_creds - Override the current process's subjective credentials
+ * @new: The credentials to be assigned
+ *
+ * Install a set of temporary override subjective credentials on the current
+ * process, returning the old set for later reversion.
+ */
+const struct cred *override_creds(const struct cred *new)
+{
+        const struct cred *old = current->cred;
+
+        rcu_assign_pointer(current->cred, get_cred(new));
+        return old;
+}
+EXPORT_SYMBOL(override_creds);
+
+/**
+ * revert_creds - Revert a temporary subjective credentials override
+ * @old: The credentials to be restored
+ *
+ * Revert a temporary set of override subjective credentials to an old set,
+ * discarding the override set.
+ */
+void revert_creds(const struct cred *old)
+{
+        const struct cred *override = current->cred;
+
+        rcu_assign_pointer(current->cred, old);
+        put_cred(override);
+}
+EXPORT_SYMBOL(revert_creds);
+
+/*
+ * initialise the credentials stuff
+ */
+void __init cred_init(void)
+{
+        /* allocate a slab in which we can store credentials */
+        cred_jar = kmem_cache_create("cred_jar", sizeof(struct cred),
+                                     0, SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL);
+}
+
+/**
+ * prepare_kernel_cred - Prepare a set of credentials for a kernel service
+ * @daemon: A userspace daemon to be used as a reference
+ *
+ * Prepare a set of credentials for a kernel service.  This can then be used to
+ * override a task's own credentials so that work can be done on behalf of that
+ * task that requires a different subjective context.
+ *
+ * @daemon is used to provide a base for the security record, but can be NULL.
+ * If @daemon is supplied, then the security data will be derived from that;
+ * otherwise they'll be set to 0 and no groups, full capabilities and no keys.
+ *
+ * The caller may change these controls afterwards if desired.
+ *
+ * Returns the new credentials or NULL if out of memory.
+ *
+ * Does not take, and does not return holding current->cred_replace_mutex.
+ */
+struct cred *prepare_kernel_cred(struct task_struct *daemon)
+{
+        const struct cred *old;
+        struct cred *new;
+
+        new = kmem_cache_alloc(cred_jar, GFP_KERNEL);
+        if (!new)
+                return NULL;
+
+        if (daemon)
+                old = get_task_cred(daemon);
+        else
+                old = get_cred(&init_cred);
+
+        get_uid(new->user);
+        get_group_info(new->group_info);
+
+#ifdef CONFIG_KEYS
+        atomic_inc(&init_tgcred.usage);
+        new->tgcred = &init_tgcred;
+        new->request_key_auth = NULL;
+        new->thread_keyring = NULL;
+        new->jit_keyring = KEY_REQKEY_DEFL_THREAD_KEYRING;
+#endif
+
+#ifdef CONFIG_SECURITY
+        new->security = NULL;
+#endif
+        if (security_prepare_creds(new, old, GFP_KERNEL) < 0)
+                goto error;
+
+        atomic_set(&new->usage, 1);
+        put_cred(old);
+        return new;
+
+error:
+        put_cred(new);
+        return NULL;
+}
+EXPORT_SYMBOL(prepare_kernel_cred);
+
+/**
+ * set_security_override - Set the security ID in a set of credentials
+ * @new: The credentials to alter
+ * @secid: The LSM security ID to set
+ *
+ * Set the LSM security ID in a set of credentials so that the subjective
+ * security is overridden when an alternative set of credentials is used.
+ */
+int set_security_override(struct cred *new, u32 secid)
+{
+        return security_kernel_act_as(new, secid);
+}
+EXPORT_SYMBOL(set_security_override);
+
+/**
+ * set_security_override_from_ctx - Set the security ID in a set of credentials
+ * @new: The credentials to alter
+ * @secctx: The LSM security context to generate the security ID from.
+ *
+ * Set the LSM security ID in a set of credentials so that the subjective
+ * security is overridden when an alternative set of credentials is used.  The
+ * security ID is specified in string form as a security context to be
+ * interpreted by the LSM.
+ */
+int set_security_override_from_ctx(struct cred *new, const char *secctx)
+{
+        u32 secid;
+        int ret;
+
+        ret = security_secctx_to_secid(secctx, strlen(secctx), &secid);
+        if (ret < 0)
+                return ret;
+
+        return set_security_override(new, secid);
+}
+EXPORT_SYMBOL(set_security_override_from_ctx);
+
+/**
+ * set_create_files_as - Set the LSM file create context in a set of credentials
+ * @new: The credentials to alter
+ * @inode: The inode to take the context from
+ *
+ * Change the LSM file creation context in a set of credentials to be the same
+ * as the object context of the specified inode, so that the new inodes have
+ * the same MAC context as that inode.
+ */
+int set_create_files_as(struct cred *new, struct inode *inode)
+{
+        new->fsuid = inode->i_uid;
+        new->fsgid = inode->i_gid;
+        return security_kernel_create_files_as(new, inode);
+}
+EXPORT_SYMBOL(set_create_files_as);
diff --git a/kernel/exit.c b/kernel/exit.c
index 2d8be7ebb0f7..ccb87162ff62 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -46,12 +46,14 @@
 #include <linux/blkdev.h>
 #include <linux/task_io_accounting_ops.h>
 #include <linux/tracehook.h>
+#include <linux/init_task.h>
 #include <trace/sched.h>
 
 #include <asm/uaccess.h>
 #include <asm/unistd.h>
 #include <asm/pgtable.h>
 #include <asm/mmu_context.h>
+#include "cred-internals.h"
 
 static void exit_mm(struct task_struct * tsk);
 
@@ -164,7 +166,10 @@ void release_task(struct task_struct * p)
         int zap_leader;
 repeat:
         tracehook_prepare_release_task(p);
-        atomic_dec(&p->user->processes);
+        /* don't need to get the RCU readlock here - the process is dead and
+         * can't be modifying its own credentials */
+        atomic_dec(&__task_cred(p)->user->processes);
+
         proc_flush_task(p);
         write_lock_irq(&tasklist_lock);
         tracehook_finish_release_task(p);
@@ -339,12 +344,12 @@ static void reparent_to_kthreadd(void)
         /* cpus_allowed? */
         /* rt_priority? */
         /* signals? */
-        security_task_reparent_to_init(current);
         memcpy(current->signal->rlim, init_task.signal->rlim,
                sizeof(current->signal->rlim));
-        atomic_inc(&(INIT_USER->__count));
+
+        atomic_inc(&init_cred.usage);
+        commit_creds(&init_cred);
         write_unlock_irq(&tasklist_lock);
-        switch_uid(INIT_USER);
 }
 
 void __set_special_pids(struct pid *pid)
@@ -1078,7 +1083,6 @@ NORET_TYPE void do_exit(long code)
         check_stack_usage();
         exit_thread();
         cgroup_exit(tsk, 1);
-        exit_keys(tsk);
 
         if (group_dead && tsk->signal->leader)
                 disassociate_ctty(1);
@@ -1263,12 +1267,12 @@ static int wait_task_zombie(struct task_struct *p, int options,
         unsigned long state;
         int retval, status, traced;
         pid_t pid = task_pid_vnr(p);
+        uid_t uid = __task_cred(p)->uid;
 
         if (!likely(options & WEXITED))
                 return 0;
 
         if (unlikely(options & WNOWAIT)) {
-                uid_t uid = p->uid;
                 int exit_code = p->exit_code;
                 int why, status;
 
@@ -1389,7 +1393,7 @@ static int wait_task_zombie(struct task_struct *p, int options,
         if (!retval && infop)
                 retval = put_user(pid, &infop->si_pid);
         if (!retval && infop)
-                retval = put_user(p->uid, &infop->si_uid);
+                retval = put_user(uid, &infop->si_uid);
         if (!retval)
                 retval = pid;
 
@@ -1454,7 +1458,8 @@ static int wait_task_stopped(int ptrace, struct task_struct *p,
         if (!unlikely(options & WNOWAIT))
                 p->exit_code = 0;
 
-        uid = p->uid;
+        /* don't need the RCU readlock here as we're holding a spinlock */
+        uid = __task_cred(p)->uid;
 unlock_sig:
         spin_unlock_irq(&p->sighand->siglock);
         if (!exit_code)
@@ -1528,10 +1533,10 @@ static int wait_task_continued(struct task_struct *p, int options,
         }
         if (!unlikely(options & WNOWAIT))
                 p->signal->flags &= ~SIGNAL_STOP_CONTINUED;
+        uid = __task_cred(p)->uid;
         spin_unlock_irq(&p->sighand->siglock);
 
         pid = task_pid_vnr(p);
-        uid = p->uid;
         get_task_struct(p);
         read_unlock(&tasklist_lock);
 
diff --git a/kernel/fork.c b/kernel/fork.c
index 495da2e9a8b4..4e8ca23c0ede 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -147,9 +147,8 @@ void __put_task_struct(struct task_struct *tsk)
         WARN_ON(atomic_read(&tsk->usage));
         WARN_ON(tsk == current);
 
-        security_task_free(tsk);
-        free_uid(tsk->user);
-        put_group_info(tsk->group_info);
+        put_cred(tsk->real_cred);
+        put_cred(tsk->cred);
         delayacct_tsk_free(tsk);
 
         if (!profile_handoff_task(tsk))
@@ -818,12 +817,6 @@ static int copy_signal(unsigned long clone_flags, struct task_struct *tsk)
         if (!sig)
                 return -ENOMEM;
 
-        ret = copy_thread_group_keys(tsk);
-        if (ret < 0) {
-                kmem_cache_free(signal_cachep, sig);
-                return ret;
-        }
-
         atomic_set(&sig->count, 1);
         atomic_set(&sig->live, 1);
         init_waitqueue_head(&sig->wait_chldexit);
@@ -868,7 +861,6 @@ static int copy_signal(unsigned long clone_flags, struct task_struct *tsk)
 void __cleanup_signal(struct signal_struct *sig)
 {
         thread_group_cputime_free(sig);
-        exit_thread_group_keys(sig);
         tty_kref_put(sig->tty);
         kmem_cache_free(signal_cachep, sig);
 }
@@ -984,16 +976,16 @@ static struct task_struct *copy_process(unsigned long clone_flags,
         DEBUG_LOCKS_WARN_ON(!p->softirqs_enabled);
 #endif
         retval = -EAGAIN;
-        if (atomic_read(&p->user->processes) >=
+        if (atomic_read(&p->real_cred->user->processes) >=
                         p->signal->rlim[RLIMIT_NPROC].rlim_cur) {
                 if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RESOURCE) &&
-                    p->user != current->nsproxy->user_ns->root_user)
+                    p->real_cred->user != INIT_USER)
                         goto bad_fork_free;
         }
 
-        atomic_inc(&p->user->__count);
-        atomic_inc(&p->user->processes);
-        get_group_info(p->group_info);
+        retval = copy_creds(p, clone_flags);
+        if (retval < 0)
+                goto bad_fork_free;
 
         /*
          * If multiple threads are within copy_process(), then this check
@@ -1048,10 +1040,6 @@ static struct task_struct *copy_process(unsigned long clone_flags,
         do_posix_clock_monotonic_gettime(&p->start_time);
         p->real_start_time = p->start_time;
         monotonic_to_bootbased(&p->real_start_time);
-#ifdef CONFIG_SECURITY
-        p->security = NULL;
-#endif
-        p->cap_bset = current->cap_bset;
         p->io_context = NULL;
         p->audit_context = NULL;
         cgroup_fork(p);
@@ -1096,10 +1084,8 @@ static struct task_struct *copy_process(unsigned long clone_flags,
         /* Perform scheduler related setup. Assign this task to a CPU. */
         sched_fork(p, clone_flags);
 
-        if ((retval = security_task_alloc(p)))
-                goto bad_fork_cleanup_policy;
         if ((retval = audit_alloc(p)))
-                goto bad_fork_cleanup_security;
+                goto bad_fork_cleanup_policy;
         /* copy all the process information */
         if ((retval = copy_semundo(clone_flags, p)))
                 goto bad_fork_cleanup_audit;
@@ -1113,10 +1099,8 @@ static struct task_struct *copy_process(unsigned long clone_flags,
                 goto bad_fork_cleanup_sighand;
         if ((retval = copy_mm(clone_flags, p)))
                 goto bad_fork_cleanup_signal;
-        if ((retval = copy_keys(clone_flags, p)))
-                goto bad_fork_cleanup_mm;
         if ((retval = copy_namespaces(clone_flags, p)))
-                goto bad_fork_cleanup_keys;
+                goto bad_fork_cleanup_mm;
         if ((retval = copy_io(clone_flags, p)))
                 goto bad_fork_cleanup_namespaces;
         retval = copy_thread(0, clone_flags, stack_start, stack_size, p, regs);
@@ -1281,8 +1265,6 @@ bad_fork_cleanup_io:
         put_io_context(p->io_context);
 bad_fork_cleanup_namespaces:
         exit_task_namespaces(p);
-bad_fork_cleanup_keys:
-        exit_keys(p);
 bad_fork_cleanup_mm:
         if (p->mm)
                 mmput(p->mm);
@@ -1298,8 +1280,6 @@ bad_fork_cleanup_semundo:
         exit_sem(p);
 bad_fork_cleanup_audit:
         audit_free(p);
-bad_fork_cleanup_security:
-        security_task_free(p);
 bad_fork_cleanup_policy:
 #ifdef CONFIG_NUMA
         mpol_put(p->mempolicy);
@@ -1312,9 +1292,9 @@ bad_fork_cleanup_cgroup:
 bad_fork_cleanup_put_domain:
         module_put(task_thread_info(p)->exec_domain->module);
 bad_fork_cleanup_count:
-        put_group_info(p->group_info);
-        atomic_dec(&p->user->processes);
-        free_uid(p->user);
+        atomic_dec(&p->cred->user->processes);
+        put_cred(p->real_cred);
+        put_cred(p->cred);
 bad_fork_free:
         free_task(p);
 fork_out:
@@ -1358,6 +1338,21 @@ long do_fork(unsigned long clone_flags,
         long nr;
 
         /*
+         * Do some preliminary argument and permissions checking before we
+         * actually start allocating stuff
+         */
+        if (clone_flags & CLONE_NEWUSER) {
+                if (clone_flags & CLONE_THREAD)
+                        return -EINVAL;
+                /* hopefully this check will go away when userns support is
+                 * complete
+                 */
+                if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SETUID) ||
+                                !capable(CAP_SETGID))
+                        return -EPERM;
+        }
+
+        /*
          * We hope to recycle these flags after 2.6.26
          */
         if (unlikely(clone_flags & CLONE_STOPPED)) {
@@ -1605,8 +1600,7 @@ asmlinkage long sys_unshare(unsigned long unshare_flags)
         err = -EINVAL;
         if (unshare_flags & ~(CLONE_THREAD|CLONE_FS|CLONE_NEWNS|CLONE_SIGHAND|
                                 CLONE_VM|CLONE_FILES|CLONE_SYSVSEM|
-                                CLONE_NEWUTS|CLONE_NEWIPC|CLONE_NEWUSER|
-                                CLONE_NEWNET))
+                                CLONE_NEWUTS|CLONE_NEWIPC|CLONE_NEWNET))
                 goto bad_unshare_out;
 
         /*
diff --git a/kernel/futex.c b/kernel/futex.c
index 8af10027514b..4fe790e89d0f 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -439,13 +439,20 @@ static void free_pi_state(struct futex_pi_state *pi_state)
 static struct task_struct * futex_find_get_task(pid_t pid)
 {
         struct task_struct *p;
+        const struct cred *cred = current_cred(), *pcred;
 
         rcu_read_lock();
         p = find_task_by_vpid(pid);
-        if (!p || ((current->euid != p->euid) && (current->euid != p->uid)))
+        if (!p) {
                 p = ERR_PTR(-ESRCH);
-        else
-                get_task_struct(p);
+        } else {
+                pcred = __task_cred(p);
+                if (cred->euid != pcred->euid &&
+                    cred->euid != pcred->uid)
+                        p = ERR_PTR(-ESRCH);
+                else
+                        get_task_struct(p);
+        }
 
         rcu_read_unlock();
 
@@ -1829,6 +1836,7 @@ sys_get_robust_list(int pid, struct robust_list_head __user * __user *head_ptr,
 {
         struct robust_list_head __user *head;
         unsigned long ret;
+        const struct cred *cred = current_cred(), *pcred;
 
         if (!futex_cmpxchg_enabled)
                 return -ENOSYS;
@@ -1844,8 +1852,10 @@ sys_get_robust_list(int pid, struct robust_list_head __user * __user *head_ptr,
                 if (!p)
                         goto err_unlock;
                 ret = -EPERM;
-                if ((current->euid != p->euid) && (current->euid != p->uid) &&
-                                !capable(CAP_SYS_PTRACE))
+                pcred = __task_cred(p);
+                if (cred->euid != pcred->euid &&
+                    cred->euid != pcred->uid &&
+                    !capable(CAP_SYS_PTRACE))
                         goto err_unlock;
                 head = p->robust_list;
                 rcu_read_unlock();
diff --git a/kernel/futex_compat.c b/kernel/futex_compat.c
index 04ac3a9e42cf..d607a5b9ee29 100644
--- a/kernel/futex_compat.c
+++ b/kernel/futex_compat.c
@@ -135,6 +135,7 @@ compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
 {
         struct compat_robust_list_head __user *head;
         unsigned long ret;
+        const struct cred *cred = current_cred(), *pcred;
 
         if (!futex_cmpxchg_enabled)
                 return -ENOSYS;
@@ -150,8 +151,10 @@ compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
                 if (!p)
                         goto err_unlock;
                 ret = -EPERM;
-                if ((current->euid != p->euid) && (current->euid != p->uid) &&
-                                !capable(CAP_SYS_PTRACE))
+                pcred = __task_cred(p);
+                if (cred->euid != pcred->euid &&
+                    cred->euid != pcred->uid &&
+                    !capable(CAP_SYS_PTRACE))
                         goto err_unlock;
                 head = p->compat_robust_list;
                 read_unlock(&tasklist_lock);
diff --git a/kernel/kmod.c b/kernel/kmod.c
index 3d3c3ea3a023..b46dbb908669 100644
--- a/kernel/kmod.c
+++ b/kernel/kmod.c
@@ -118,10 +118,10 @@ EXPORT_SYMBOL(request_module);
 struct subprocess_info {
         struct work_struct work;
         struct completion *complete;
+        struct cred *cred;
         char *path;
         char **argv;
         char **envp;
-        struct key *ring;
         enum umh_wait wait;
         int retval;
         struct file *stdin;
@@ -134,19 +134,20 @@ struct subprocess_info {
 static int ____call_usermodehelper(void *data)
 {
         struct subprocess_info *sub_info = data;
-        struct key *new_session, *old_session;
         int retval;
 
-        /* Unblock all signals and set the session keyring. */
-        new_session = key_get(sub_info->ring);
+        BUG_ON(atomic_read(&sub_info->cred->usage) != 1);
+
+        /* Unblock all signals */
         spin_lock_irq(&current->sighand->siglock);
-        old_session = __install_session_keyring(current, new_session);
         flush_signal_handlers(current, 1);
         sigemptyset(&current->blocked);
         recalc_sigpending();
         spin_unlock_irq(&current->sighand->siglock);
 
-        key_put(old_session);
+        /* Install the credentials */
+        commit_creds(sub_info->cred);
+        sub_info->cred = NULL;
 
         /* Install input pipe when needed */
         if (sub_info->stdin) {
@@ -185,6 +186,8 @@ void call_usermodehelper_freeinfo(struct subprocess_info *info)
 {
         if (info->cleanup)
                 (*info->cleanup)(info->argv, info->envp);
+        if (info->cred)
+                put_cred(info->cred);
         kfree(info);
 }
 EXPORT_SYMBOL(call_usermodehelper_freeinfo);
@@ -240,6 +243,8 @@ static void __call_usermodehelper(struct work_struct *work)
         pid_t pid;
         enum umh_wait wait = sub_info->wait;
 
+        BUG_ON(atomic_read(&sub_info->cred->usage) != 1);
+
         /* CLONE_VFORK: wait until the usermode helper has execve'd
          * successfully We need the data structures to stay around
          * until that is done.  */
@@ -362,6 +367,9 @@ struct subprocess_info *call_usermodehelper_setup(char *path, char **argv,
         sub_info->path = path;
         sub_info->argv = argv;
         sub_info->envp = envp;
+        sub_info->cred = prepare_usermodehelper_creds();
+        if (!sub_info->cred)
+                return NULL;
 
   out:
         return sub_info;
@@ -376,7 +384,13 @@ EXPORT_SYMBOL(call_usermodehelper_setup);
 void call_usermodehelper_setkeys(struct subprocess_info *info,
                                  struct key *session_keyring)
 {
-        info->ring = session_keyring;
+#ifdef CONFIG_KEYS
+        struct thread_group_cred *tgcred = info->cred->tgcred;
+        key_put(tgcred->session_keyring);
+        tgcred->session_keyring = key_get(session_keyring);
+#else
+        BUG();
+#endif
 }
 EXPORT_SYMBOL(call_usermodehelper_setkeys);
 
@@ -444,6 +458,8 @@ int call_usermodehelper_exec(struct subprocess_info *sub_info,
         DECLARE_COMPLETION_ONSTACK(done);
         int retval = 0;
 
+        BUG_ON(atomic_read(&sub_info->cred->usage) != 1);
+
         helper_lock();
         if (sub_info->path[0] == '\0')
                 goto out;
diff --git a/kernel/nsproxy.c b/kernel/nsproxy.c
index 1d3ef29a2583..63598dca2d0c 100644
--- a/kernel/nsproxy.c
+++ b/kernel/nsproxy.c
@@ -80,12 +80,6 @@ static struct nsproxy *create_new_namespaces(unsigned long flags,
                 goto out_pid;
         }
 
-        new_nsp->user_ns = copy_user_ns(flags, tsk->nsproxy->user_ns);
-        if (IS_ERR(new_nsp->user_ns)) {
-                err = PTR_ERR(new_nsp->user_ns);
-                goto out_user;
-        }
-
         new_nsp->net_ns = copy_net_ns(flags, tsk->nsproxy->net_ns);
         if (IS_ERR(new_nsp->net_ns)) {
                 err = PTR_ERR(new_nsp->net_ns);
@@ -95,9 +89,6 @@ static struct nsproxy *create_new_namespaces(unsigned long flags,
         return new_nsp;
 
 out_net:
-        if (new_nsp->user_ns)
-                put_user_ns(new_nsp->user_ns);
-out_user:
         if (new_nsp->pid_ns)
                 put_pid_ns(new_nsp->pid_ns);
 out_pid:
@@ -130,7 +121,7 @@ int copy_namespaces(unsigned long flags, struct task_struct *tsk)
         get_nsproxy(old_ns);
 
         if (!(flags & (CLONE_NEWNS | CLONE_NEWUTS | CLONE_NEWIPC |
-                                CLONE_NEWUSER | CLONE_NEWPID | CLONE_NEWNET)))
+                                CLONE_NEWPID | CLONE_NEWNET)))
                 return 0;
 
         if (!capable(CAP_SYS_ADMIN)) {
@@ -173,8 +164,6 @@ void free_nsproxy(struct nsproxy *ns)
                 put_ipc_ns(ns->ipc_ns);
         if (ns->pid_ns)
                 put_pid_ns(ns->pid_ns);
-        if (ns->user_ns)
-                put_user_ns(ns->user_ns);
         put_net(ns->net_ns);
         kmem_cache_free(nsproxy_cachep, ns);
 }
@@ -189,7 +178,7 @@ int unshare_nsproxy_namespaces(unsigned long unshare_flags,
         int err = 0;
 
         if (!(unshare_flags & (CLONE_NEWNS | CLONE_NEWUTS | CLONE_NEWIPC |
-                               CLONE_NEWUSER | CLONE_NEWNET)))
+                               CLONE_NEWNET)))
                 return 0;
 
         if (!capable(CAP_SYS_ADMIN))
diff --git a/kernel/ptrace.c b/kernel/ptrace.c
index 4c8bcd7dd8e0..ca2df68faf76 100644
--- a/kernel/ptrace.c
+++ b/kernel/ptrace.c
@@ -115,6 +115,8 @@ int ptrace_check_attach(struct task_struct *child, int kill)
 
 int __ptrace_may_access(struct task_struct *task, unsigned int mode)
 {
+        const struct cred *cred = current_cred(), *tcred;
+
         /* May we inspect the given task?
          * This check is used both for attaching with ptrace
          * and for allowing access to sensitive information in /proc.
@@ -127,13 +129,19 @@ int __ptrace_may_access(struct task_struct *task, unsigned int mode)
         /* Don't let security modules deny introspection */
         if (task == current)
                 return 0;
-        if (((current->uid != task->euid) ||
-             (current->uid != task->suid) ||
-             (current->uid != task->uid) ||
-             (current->gid != task->egid) ||
-             (current->gid != task->sgid) ||
-             (current->gid != task->gid)) && !capable(CAP_SYS_PTRACE))
+        rcu_read_lock();
+        tcred = __task_cred(task);
+        if ((cred->uid != tcred->euid ||
+             cred->uid != tcred->suid ||
+             cred->uid != tcred->uid  ||
+             cred->gid != tcred->egid ||
+             cred->gid != tcred->sgid ||
+             cred->gid != tcred->gid) &&
+            !capable(CAP_SYS_PTRACE)) {
+                rcu_read_unlock();
                 return -EPERM;
+        }
+        rcu_read_unlock();
         smp_rmb();
         if (task->mm)
                 dumpable = get_dumpable(task->mm);
@@ -163,6 +171,14 @@ int ptrace_attach(struct task_struct *task)
         if (same_thread_group(task, current))
                 goto out;
 
+        /* Protect exec's credential calculations against our interference;
+         * SUID, SGID and LSM creds get determined differently under ptrace.
+         */
+        retval = mutex_lock_interruptible(&current->cred_exec_mutex);
+        if (retval  < 0)
+                goto out;
+
+        retval = -EPERM;
 repeat:
         /*
          * Nasty, nasty.
@@ -202,6 +218,7 @@ repeat:
 bad:
         write_unlock_irqrestore(&tasklist_lock, flags);
         task_unlock(task);
+        mutex_unlock(&current->cred_exec_mutex);
 out:
         return retval;
 }
diff --git a/kernel/sched.c b/kernel/sched.c
index e4bb1dd7b308..33cf4a1cbcd1 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -345,7 +345,9 @@ static inline struct task_group *task_group(struct task_struct *p)
         struct task_group *tg;
 
 #ifdef CONFIG_USER_SCHED
-        tg = p->user->tg;
+        rcu_read_lock();
+        tg = __task_cred(p)->user->tg;
+        rcu_read_unlock();
 #elif defined(CONFIG_CGROUP_SCHED)
         tg = container_of(task_subsys_state(p, cpu_cgroup_subsys_id),
                                 struct task_group, css);
@@ -5134,6 +5136,22 @@ __setscheduler(struct rq *rq, struct task_struct *p, int policy, int prio)
         set_load_weight(p);
 }
 
+/*
+ * check the target process has a UID that matches the current process's
+ */
+static bool check_same_owner(struct task_struct *p)
+{
+        const struct cred *cred = current_cred(), *pcred;
+        bool match;
+
+        rcu_read_lock();
+        pcred = __task_cred(p);
+        match = (cred->euid == pcred->euid ||
+                 cred->euid == pcred->uid);
+        rcu_read_unlock();
+        return match;
+}
+
 static int __sched_setscheduler(struct task_struct *p, int policy,
                                 struct sched_param *param, bool user)
 {
@@ -5193,8 +5211,7 @@ recheck:
                         return -EPERM;
 
                 /* can't change other user's priorities */
-                if ((current->euid != p->euid) &&
-                    (current->euid != p->uid))
+                if (!check_same_owner(p))
                         return -EPERM;
         }
 
@@ -5426,8 +5443,7 @@ long sched_setaffinity(pid_t pid, const cpumask_t *in_mask)
         read_unlock(&tasklist_lock);
 
         retval = -EPERM;
-        if ((current->euid != p->euid) && (current->euid != p->uid) &&
-                        !capable(CAP_SYS_NICE))
+        if (!check_same_owner(p) && !capable(CAP_SYS_NICE))
                 goto out_unlock;
 
         retval = security_task_setscheduler(p, 0, NULL);
diff --git a/kernel/signal.c b/kernel/signal.c
index 4530fc654455..2a64304ed54b 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -177,6 +177,11 @@ int next_signal(struct sigpending *pending, sigset_t *mask)
         return sig;
 }
 
+/*
+ * allocate a new signal queue record
+ * - this may be called without locks if and only if t == current, otherwise an
+ *   appopriate lock must be held to stop the target task from exiting
+ */
 static struct sigqueue *__sigqueue_alloc(struct task_struct *t, gfp_t flags,
                                          int override_rlimit)
 {
@@ -184,11 +189,12 @@ static struct sigqueue *__sigqueue_alloc(struct task_struct *t, gfp_t flags,
         struct user_struct *user;
 
         /*
-         * In order to avoid problems with "switch_user()", we want to make
-         * sure that the compiler doesn't re-load "t->user"
+         * We won't get problems with the target's UID changing under us
+         * because changing it requires RCU be used, and if t != current, the
+         * caller must be holding the RCU readlock (by way of a spinlock) and
+         * we use RCU protection here
          */
-        user = t->user;
-        barrier();
+        user = get_uid(__task_cred(t)->user);
         atomic_inc(&user->sigpending);
         if (override_rlimit ||
             atomic_read(&user->sigpending) <=
@@ -196,12 +202,14 @@ static struct sigqueue *__sigqueue_alloc(struct task_struct *t, gfp_t flags,
                 q = kmem_cache_alloc(sigqueue_cachep, flags);
         if (unlikely(q == NULL)) {
                 atomic_dec(&user->sigpending);
+                free_uid(user);
         } else {
                 INIT_LIST_HEAD(&q->list);
                 q->flags = 0;
-                q->user = get_uid(user);
+                q->user = user;
         }
-        return(q);
+
+        return q;
 }
 
 static void __sigqueue_free(struct sigqueue *q)
@@ -562,10 +570,12 @@ static int rm_from_queue(unsigned long mask, struct sigpending *s)
 
 /*
  * Bad permissions for sending the signal
+ * - the caller must hold at least the RCU read lock
  */
 static int check_kill_permission(int sig, struct siginfo *info,
                                  struct task_struct *t)
 {
+        const struct cred *cred = current_cred(), *tcred;
         struct pid *sid;
         int error;
 
@@ -579,8 +589,11 @@ static int check_kill_permission(int sig, struct siginfo *info,
         if (error)
                 return error;
 
-        if ((current->euid ^ t->suid) && (current->euid ^ t->uid) &&
-            (current->uid  ^ t->suid) && (current->uid  ^ t->uid) &&
+        tcred = __task_cred(t);
+        if ((cred->euid ^ tcred->suid) &&
+            (cred->euid ^ tcred->uid) &&
+            (cred->uid  ^ tcred->suid) &&
+            (cred->uid  ^ tcred->uid) &&
             !capable(CAP_KILL)) {
                 switch (sig) {
                 case SIGCONT:
@@ -844,7 +857,7 @@ static int send_signal(int sig, struct siginfo *info, struct task_struct *t,
                         q->info.si_errno = 0;
                         q->info.si_code = SI_USER;
                         q->info.si_pid = task_pid_vnr(current);
-                        q->info.si_uid = current->uid;
+                        q->info.si_uid = current_uid();
                         break;
                 case (unsigned long) SEND_SIG_PRIV:
                         q->info.si_signo = sig;
@@ -1008,6 +1021,10 @@ struct sighand_struct *lock_task_sighand(struct task_struct *tsk, unsigned long
         return sighand;
 }
 
+/*
+ * send signal info to all the members of a group
+ * - the caller must hold the RCU read lock at least
+ */
 int group_send_sig_info(int sig, struct siginfo *info, struct task_struct *p)
 {
         unsigned long flags;
@@ -1029,8 +1046,8 @@ int group_send_sig_info(int sig, struct siginfo *info, struct task_struct *p)
 /*
  * __kill_pgrp_info() sends a signal to a process group: this is what the tty
  * control characters do (^C, ^Z etc)
+ * - the caller must hold at least a readlock on tasklist_lock
  */
-
 int __kill_pgrp_info(int sig, struct siginfo *info, struct pid *pgrp)
 {
         struct task_struct *p = NULL;
@@ -1086,6 +1103,7 @@ int kill_pid_info_as_uid(int sig, struct siginfo *info, struct pid *pid,
 {
         int ret = -EINVAL;
         struct task_struct *p;
+        const struct cred *pcred;
 
         if (!valid_signal(sig))
                 return ret;
@@ -1096,9 +1114,11 @@ int kill_pid_info_as_uid(int sig, struct siginfo *info, struct pid *pid,
                 ret = -ESRCH;
                 goto out_unlock;
         }
-        if ((info == SEND_SIG_NOINFO || (!is_si_special(info) && SI_FROMUSER(info)))
-            && (euid != p->suid) && (euid != p->uid)
-            && (uid != p->suid) && (uid != p->uid)) {
+        pcred = __task_cred(p);
+        if ((info == SEND_SIG_NOINFO ||
+             (!is_si_special(info) && SI_FROMUSER(info))) &&
+            euid != pcred->suid && euid != pcred->uid &&
+            uid  != pcred->suid && uid  != pcred->uid) {
                 ret = -EPERM;
                 goto out_unlock;
         }
@@ -1369,10 +1389,9 @@ int do_notify_parent(struct task_struct *tsk, int sig)
          */
         rcu_read_lock();
         info.si_pid = task_pid_nr_ns(tsk, tsk->parent->nsproxy->pid_ns);
+        info.si_uid = __task_cred(tsk)->uid;
         rcu_read_unlock();
 
-        info.si_uid = tsk->uid;
-
         thread_group_cputime(tsk, &cputime);
         info.si_utime = cputime_to_jiffies(cputime.utime);
         info.si_stime = cputime_to_jiffies(cputime.stime);
@@ -1440,10 +1459,9 @@ static void do_notify_parent_cldstop(struct task_struct *tsk, int why)
          */
         rcu_read_lock();
         info.si_pid = task_pid_nr_ns(tsk, tsk->parent->nsproxy->pid_ns);
+        info.si_uid = __task_cred(tsk)->uid;
         rcu_read_unlock();
 
-        info.si_uid = tsk->uid;
-
         info.si_utime = cputime_to_clock_t(tsk->utime);
         info.si_stime = cputime_to_clock_t(tsk->stime);
 
@@ -1598,7 +1616,7 @@ void ptrace_notify(int exit_code)
         info.si_signo = SIGTRAP;
         info.si_code = exit_code;
         info.si_pid = task_pid_vnr(current);
-        info.si_uid = current->uid;
+        info.si_uid = current_uid();
 
         /* Let the debugger run.  */
         spin_lock_irq(&current->sighand->siglock);
@@ -1710,7 +1728,7 @@ static int ptrace_signal(int signr, siginfo_t *info,
                 info->si_errno = 0;
                 info->si_code = SI_USER;
                 info->si_pid = task_pid_vnr(current->parent);
-                info->si_uid = current->parent->uid;
+                info->si_uid = task_uid(current->parent);
         }
 
         /* If the (new) signal is now blocked, requeue it.  */
@@ -2211,7 +2229,7 @@ sys_kill(pid_t pid, int sig)
         info.si_errno = 0;
         info.si_code = SI_USER;
         info.si_pid = task_tgid_vnr(current);
-        info.si_uid = current->uid;
+        info.si_uid = current_uid();
 
         return kill_something_info(sig, &info, pid);
 }
@@ -2228,7 +2246,7 @@ static int do_tkill(pid_t tgid, pid_t pid, int sig)
         info.si_errno = 0;
         info.si_code = SI_TKILL;
         info.si_pid = task_tgid_vnr(current);
-        info.si_uid = current->uid;
+        info.si_uid = current_uid();
 
         rcu_read_lock();
         p = find_task_by_vpid(pid);
diff --git a/kernel/sys.c b/kernel/sys.c
index 31deba8f7d16..ebe65c2c9873 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -112,12 +112,17 @@ EXPORT_SYMBOL(cad_pid);
 
 void (*pm_power_off_prepare)(void);
 
+/*
+ * set the priority of a task
+ * - the caller must hold the RCU read lock
+ */
 static int set_one_prio(struct task_struct *p, int niceval, int error)
 {
+        const struct cred *cred = current_cred(), *pcred = __task_cred(p);
         int no_nice;
 
-        if (p->uid != current->euid &&
-                p->euid != current->euid && !capable(CAP_SYS_NICE)) {
+        if (pcred->uid  != cred->euid &&
+            pcred->euid != cred->euid && !capable(CAP_SYS_NICE)) {
                 error = -EPERM;
                 goto out;
         }
@@ -141,6 +146,7 @@ asmlinkage long sys_setpriority(int which, int who, int niceval)
 {
         struct task_struct *g, *p;
         struct user_struct *user;
+        const struct cred *cred = current_cred();
         int error = -EINVAL;
         struct pid *pgrp;
 
@@ -174,18 +180,18 @@ asmlinkage long sys_setpriority(int which, int who, int niceval)
                         } while_each_pid_thread(pgrp, PIDTYPE_PGID, p);
                         break;
                 case PRIO_USER:
-                        user = current->user;
+                        user = (struct user_struct *) cred->user;
                         if (!who)
-                                who = current->uid;
-                        else
-                                if ((who != current->uid) && !(user = find_user(who)))
-                                        goto out_unlock;        /* No processes for this user */
+                                who = cred->uid;
+                        else if ((who != cred->uid) &&
+                                 !(user = find_user(who)))
+                                goto out_unlock;        /* No processes for this user */
 
                         do_each_thread(g, p)
-                                if (p->uid == who)
+                                if (__task_cred(p)->uid == who)
                                         error = set_one_prio(p, niceval, error);
                         while_each_thread(g, p);
-                        if (who != current->uid)
+                        if (who != cred->uid)
                                 free_uid(user);         /* For find_user() */
                         break;
         }
@@ -205,6 +211,7 @@ asmlinkage long sys_getpriority(int which, int who)
 {
         struct task_struct *g, *p;
         struct user_struct *user;
+        const struct cred *cred = current_cred();
         long niceval, retval = -ESRCH;
         struct pid *pgrp;
 
@@ -236,21 +243,21 @@ asmlinkage long sys_getpriority(int which, int who)
                         } while_each_pid_thread(pgrp, PIDTYPE_PGID, p);
                         break;
                 case PRIO_USER:
-                        user = current->user;
+                        user = (struct user_struct *) cred->user;
                         if (!who)
-                                who = current->uid;
-                        else
-                                if ((who != current->uid) && !(user = find_user(who)))
-                                        goto out_unlock;        /* No processes for this user */
+                                who = cred->uid;
+                        else if ((who != cred->uid) &&
+                                 !(user = find_user(who)))
+                                goto out_unlock;        /* No processes for this user */
 
                         do_each_thread(g, p)
-                                if (p->uid == who) {
+                                if (__task_cred(p)->uid == who) {
                                         niceval = 20 - task_nice(p);
                                         if (niceval > retval)
                                                 retval = niceval;
                                 }
                         while_each_thread(g, p);
-                        if (who != current->uid)
+                        if (who != cred->uid)
                                 free_uid(user);         /* for find_user() */
                         break;
         }
@@ -472,46 +479,48 @@ void ctrl_alt_del(void)
  */
 asmlinkage long sys_setregid(gid_t rgid, gid_t egid)
 {
-        int old_rgid = current->gid;
-        int old_egid = current->egid;
-        int new_rgid = old_rgid;
-        int new_egid = old_egid;
+        const struct cred *old;
+        struct cred *new;
         int retval;
 
+        new = prepare_creds();
+        if (!new)
+                return -ENOMEM;
+        old = current_cred();
+
         retval = security_task_setgid(rgid, egid, (gid_t)-1, LSM_SETID_RE);
         if (retval)
-                return retval;
+                goto error;
 
+        retval = -EPERM;
         if (rgid != (gid_t) -1) {
-                if ((old_rgid == rgid) ||
-                    (current->egid==rgid) ||
+                if (old->gid == rgid ||
+                    old->egid == rgid ||
                     capable(CAP_SETGID))
-                        new_rgid = rgid;
+                        new->gid = rgid;
                 else
-                        return -EPERM;
+                        goto error;
         }
         if (egid != (gid_t) -1) {
-                if ((old_rgid == egid) ||
-                    (current->egid == egid) ||
-                    (current->sgid == egid) ||
+                if (old->gid == egid ||
+                    old->egid == egid ||
+                    old->sgid == egid ||
                     capable(CAP_SETGID))
-                        new_egid = egid;
+                        new->egid = egid;
                 else
-                        return -EPERM;
-        }
-        if (new_egid != old_egid) {
-                set_dumpable(current->mm, suid_dumpable);
-                smp_wmb();
+                        goto error;
         }
+
         if (rgid != (gid_t) -1 ||
-            (egid != (gid_t) -1 && egid != old_rgid))
-                current->sgid = new_egid;
-        current->fsgid = new_egid;
-        current->egid = new_egid;
-        current->gid = new_rgid;
-        key_fsgid_changed(current);
-        proc_id_connector(current, PROC_EVENT_GID);
-        return 0;
+            (egid != (gid_t) -1 && egid != old->gid))
+                new->sgid = new->egid;
+        new->fsgid = new->egid;
+
+        return commit_creds(new);
+
+error:
+        abort_creds(new);
+        return retval;
 }
 
 /*
@@ -521,56 +530,54 @@ asmlinkage long sys_setregid(gid_t rgid, gid_t egid)
  */
 asmlinkage long sys_setgid(gid_t gid)
 {
-        int old_egid = current->egid;
+        const struct cred *old;
+        struct cred *new;
         int retval;
 
+        new = prepare_creds();
+        if (!new)
+                return -ENOMEM;
+        old = current_cred();
+
         retval = security_task_setgid(gid, (gid_t)-1, (gid_t)-1, LSM_SETID_ID);
         if (retval)
-                return retval;
+                goto error;
 
-        if (capable(CAP_SETGID)) {
-                if (old_egid != gid) {
-                        set_dumpable(current->mm, suid_dumpable);
-                        smp_wmb();
-                }
-                current->gid = current->egid = current->sgid = current->fsgid = gid;
-        } else if ((gid == current->gid) || (gid == current->sgid)) {
-                if (old_egid != gid) {
-                        set_dumpable(current->mm, suid_dumpable);
-                        smp_wmb();
-                }
-                current->egid = current->fsgid = gid;
-        }
+        retval = -EPERM;
+        if (capable(CAP_SETGID))
+                new->gid = new->egid = new->sgid = new->fsgid = gid;
+        else if (gid == old->gid || gid == old->sgid)
+                new->egid = new->fsgid = gid;
         else
-                return -EPERM;
+                goto error;
 
-        key_fsgid_changed(current);
-        proc_id_connector(current, PROC_EVENT_GID);
-        return 0;
+        return commit_creds(new);
+
+error:
+        abort_creds(new);
+        return retval;
 }
   
-static int set_user(uid_t new_ruid, int dumpclear)
+/*
+ * change the user struct in a credentials set to match the new UID
+ */
+static int set_user(struct cred *new)
 {
         struct user_struct *new_user;
 
-        new_user = alloc_uid(current->nsproxy->user_ns, new_ruid);
+        new_user = alloc_uid(current_user_ns(), new->uid);
         if (!new_user)
                 return -EAGAIN;
 
         if (atomic_read(&new_user->processes) >=
                                 current->signal->rlim[RLIMIT_NPROC].rlim_cur &&
-                        new_user != current->nsproxy->user_ns->root_user) {
+                        new_user != INIT_USER) {
                 free_uid(new_user);
                 return -EAGAIN;
         }
 
-        switch_uid(new_user);
-
-        if (dumpclear) {
-                set_dumpable(current->mm, suid_dumpable);
-                smp_wmb();
-        }
-        current->uid = new_ruid;
+        free_uid(new->user);
+        new->user = new_user;
         return 0;
 }
 
@@ -591,54 +598,56 @@ static int set_user(uid_t new_ruid, int dumpclear)
  */
 asmlinkage long sys_setreuid(uid_t ruid, uid_t euid)
 {
-        int old_ruid, old_euid, old_suid, new_ruid, new_euid;
+        const struct cred *old;
+        struct cred *new;
         int retval;
 
+        new = prepare_creds();
+        if (!new)
+                return -ENOMEM;
+        old = current_cred();
+
         retval = security_task_setuid(ruid, euid, (uid_t)-1, LSM_SETID_RE);
         if (retval)
-                return retval;
-
-        new_ruid = old_ruid = current->uid;
-        new_euid = old_euid = current->euid;
-        old_suid = current->suid;
+                goto error;
 
+        retval = -EPERM;
         if (ruid != (uid_t) -1) {
-                new_ruid = ruid;
-                if ((old_ruid != ruid) &&
-                    (current->euid != ruid) &&
+                new->uid = ruid;
+                if (old->uid != ruid &&
+                    old->euid != ruid &&
                     !capable(CAP_SETUID))
-                        return -EPERM;
+                        goto error;
         }
 
         if (euid != (uid_t) -1) {
-                new_euid = euid;
-                if ((old_ruid != euid) &&
-                    (current->euid != euid) &&
-                    (current->suid != euid) &&
+                new->euid = euid;
+                if (old->uid != euid &&
+                    old->euid != euid &&
+                    old->suid != euid &&
                     !capable(CAP_SETUID))
-                        return -EPERM;
+                        goto error;
         }
 
-        if (new_ruid != old_ruid && set_user(new_ruid, new_euid != old_euid) < 0)
-                return -EAGAIN;
+        retval = -EAGAIN;
+        if (new->uid != old->uid && set_user(new) < 0)
+                goto error;
 
-        if (new_euid != old_euid) {
-                set_dumpable(current->mm, suid_dumpable);
-                smp_wmb();
-        }
-        current->fsuid = current->euid = new_euid;
         if (ruid != (uid_t) -1 ||
-            (euid != (uid_t) -1 && euid != old_ruid))
-                current->suid = current->euid;
-        current->fsuid = current->euid;
+            (euid != (uid_t) -1 && euid != old->uid))
+                new->suid = new->euid;
+        new->fsuid = new->euid;
 
-        key_fsuid_changed(current);
-        proc_id_connector(current, PROC_EVENT_UID);
-
-        return security_task_post_setuid(old_ruid, old_euid, old_suid, LSM_SETID_RE);
-}
+        retval = security_task_fix_setuid(new, old, LSM_SETID_RE);
+        if (retval < 0)
+                goto error;
 
+        return commit_creds(new);
 
+error:
+        abort_creds(new);
+        return retval;
+}
                 
 /*
  * setuid() is implemented like SysV with SAVED_IDS 
@@ -653,36 +662,41 @@ asmlinkage long sys_setreuid(uid_t ruid, uid_t euid)
  */
 asmlinkage long sys_setuid(uid_t uid)
 {
-        int old_euid = current->euid;
-        int old_ruid, old_suid, new_suid;
+        const struct cred *old;
+        struct cred *new;
         int retval;
 
+        new = prepare_creds();
+        if (!new)
+                return -ENOMEM;
+        old = current_cred();
+
         retval = security_task_setuid(uid, (uid_t)-1, (uid_t)-1, LSM_SETID_ID);
         if (retval)
-                return retval;
+                goto error;
 
-        old_ruid = current->uid;
-        old_suid = current->suid;
-        new_suid = old_suid;
-        
+        retval = -EPERM;
         if (capable(CAP_SETUID)) {
-                if (uid != old_ruid && set_user(uid, old_euid != uid) < 0)
-                        return -EAGAIN;
-                new_suid = uid;
-        } else if ((uid != current->uid) && (uid != new_suid))
-                return -EPERM;
-
-        if (old_euid != uid) {
-                set_dumpable(current->mm, suid_dumpable);
-                smp_wmb();
+                new->suid = new->uid = uid;
+                if (uid != old->uid && set_user(new) < 0) {
+                        retval = -EAGAIN;
+                        goto error;
+                }
+        } else if (uid != old->uid && uid != new->suid) {
+                goto error;
         }
-        current->fsuid = current->euid = uid;
-        current->suid = new_suid;
 
-        key_fsuid_changed(current);
-        proc_id_connector(current, PROC_EVENT_UID);
+        new->fsuid = new->euid = uid;
+
+        retval = security_task_fix_setuid(new, old, LSM_SETID_ID);
+        if (retval < 0)
+                goto error;
 
-        return security_task_post_setuid(old_ruid, old_euid, old_suid, LSM_SETID_ID);
+        return commit_creds(new);
+
+error:
+        abort_creds(new);
+        return retval;
 }
 
 
@@ -692,54 +706,63 @@ asmlinkage long sys_setuid(uid_t uid)
  */
 asmlinkage long sys_setresuid(uid_t ruid, uid_t euid, uid_t suid)
 {
-        int old_ruid = current->uid;
-        int old_euid = current->euid;
-        int old_suid = current->suid;
+        const struct cred *old;
+        struct cred *new;
         int retval;
 
+        new = prepare_creds();
+        if (!new)
+                return -ENOMEM;
+
         retval = security_task_setuid(ruid, euid, suid, LSM_SETID_RES);
         if (retval)
-                return retval;
+                goto error;
+        old = current_cred();
 
+        retval = -EPERM;
         if (!capable(CAP_SETUID)) {
-                if ((ruid != (uid_t) -1) && (ruid != current->uid) &&
-                    (ruid != current->euid) && (ruid != current->suid))
-                        return -EPERM;
-                if ((euid != (uid_t) -1) && (euid != current->uid) &&
-                    (euid != current->euid) && (euid != current->suid))
-                        return -EPERM;
-                if ((suid != (uid_t) -1) && (suid != current->uid) &&
-                    (suid != current->euid) && (suid != current->suid))
-                        return -EPERM;
+                if (ruid != (uid_t) -1 && ruid != old->uid &&
+                    ruid != old->euid  && ruid != old->suid)
+                        goto error;
+                if (euid != (uid_t) -1 && euid != old->uid &&
+                    euid != old->euid  && euid != old->suid)
+                        goto error;
+                if (suid != (uid_t) -1 && suid != old->uid &&
+                    suid != old->euid  && suid != old->suid)
+                        goto error;
         }
+
+        retval = -EAGAIN;
         if (ruid != (uid_t) -1) {
-                if (ruid != current->uid && set_user(ruid, euid != current->euid) < 0)
-                        return -EAGAIN;
+                new->uid = ruid;
+                if (ruid != old->uid && set_user(new) < 0)
+                        goto error;
         }
-        if (euid != (uid_t) -1) {
-                if (euid != current->euid) {
-                        set_dumpable(current->mm, suid_dumpable);
-                        smp_wmb();
-                }
-                current->euid = euid;
-        }
-        current->fsuid = current->euid;
+        if (euid != (uid_t) -1)
+                new->euid = euid;
         if (suid != (uid_t) -1)
-                current->suid = suid;
+                new->suid = suid;
+        new->fsuid = new->euid;
+
+        retval = security_task_fix_setuid(new, old, LSM_SETID_RES);
+        if (retval < 0)
+                goto error;
 
-        key_fsuid_changed(current);
-        proc_id_connector(current, PROC_EVENT_UID);
+        return commit_creds(new);
 
-        return security_task_post_setuid(old_ruid, old_euid, old_suid, LSM_SETID_RES);
+error:
+        abort_creds(new);
+        return retval;
 }
 
 asmlinkage long sys_getresuid(uid_t __user *ruid, uid_t __user *euid, uid_t __user *suid)
 {
+        const struct cred *cred = current_cred();
         int retval;
 
-        if (!(retval = put_user(current->uid, ruid)) &&
-            !(retval = put_user(current->euid, euid)))
-                retval = put_user(current->suid, suid);
+        if (!(retval   = put_user(cred->uid,  ruid)) &&
+            !(retval   = put_user(cred->euid, euid)))
+                retval = put_user(cred->suid, suid);
 
         return retval;
 }
@@ -749,48 +772,55 @@ asmlinkage long sys_getresuid(uid_t __user *ruid, uid_t __user *euid, uid_t __us
  */
 asmlinkage long sys_setresgid(gid_t rgid, gid_t egid, gid_t sgid)
 {
+        const struct cred *old;
+        struct cred *new;
         int retval;
 
+        new = prepare_creds();
+        if (!new)
+                return -ENOMEM;
+        old = current_cred();
+
         retval = security_task_setgid(rgid, egid, sgid, LSM_SETID_RES);
         if (retval)
-                return retval;
+                goto error;
 
+        retval = -EPERM;
         if (!capable(CAP_SETGID)) {
-                if ((rgid != (gid_t) -1) && (rgid != current->gid) &&
-                    (rgid != current->egid) && (rgid != current->sgid))
-                        return -EPERM;
-                if ((egid != (gid_t) -1) && (egid != current->gid) &&
-                    (egid != current->egid) && (egid != current->sgid))
-                        return -EPERM;
-                if ((sgid != (gid_t) -1) && (sgid != current->gid) &&
-                    (sgid != current->egid) && (sgid != current->sgid))
-                        return -EPERM;
+                if (rgid != (gid_t) -1 && rgid != old->gid &&
+                    rgid != old->egid  && rgid != old->sgid)
+                        goto error;
+                if (egid != (gid_t) -1 && egid != old->gid &&
+                    egid != old->egid  && egid != old->sgid)
+                        goto error;
+                if (sgid != (gid_t) -1 && sgid != old->gid &&
+                    sgid != old->egid  && sgid != old->sgid)
+                        goto error;
         }
-        if (egid != (gid_t) -1) {
-                if (egid != current->egid) {
-                        set_dumpable(current->mm, suid_dumpable);
-                        smp_wmb();
-                }
-                current->egid = egid;
-        }
-        current->fsgid = current->egid;
+
         if (rgid != (gid_t) -1)
-                current->gid = rgid;
+                new->gid = rgid;
+        if (egid != (gid_t) -1)
+                new->egid = egid;
         if (sgid != (gid_t) -1)
-                current->sgid = sgid;
+                new->sgid = sgid;
+        new->fsgid = new->egid;
 
-        key_fsgid_changed(current);
-        proc_id_connector(current, PROC_EVENT_GID);
-        return 0;
+        return commit_creds(new);
+
+error:
+        abort_creds(new);
+        return retval;
 }
 
 asmlinkage long sys_getresgid(gid_t __user *rgid, gid_t __user *egid, gid_t __user *sgid)
 {
+        const struct cred *cred = current_cred();
         int retval;
 
-        if (!(retval = put_user(current->gid, rgid)) &&
-            !(retval = put_user(current->egid, egid)))
-                retval = put_user(current->sgid, sgid);
+        if (!(retval   = put_user(cred->gid,  rgid)) &&
+            !(retval   = put_user(cred->egid, egid)))
+                retval = put_user(cred->sgid, sgid);
 
         return retval;
 }
@@ -804,27 +834,35 @@ asmlinkage long sys_getresgid(gid_t __user *rgid, gid_t __user *egid, gid_t __us
  */
 asmlinkage long sys_setfsuid(uid_t uid)
 {
-        int old_fsuid;
+        const struct cred *old;
+        struct cred *new;
+        uid_t old_fsuid;
 
-        old_fsuid = current->fsuid;
-        if (security_task_setuid(uid, (uid_t)-1, (uid_t)-1, LSM_SETID_FS))
-                return old_fsuid;
+        new = prepare_creds();
+        if (!new)
+                return current_fsuid();
+        old = current_cred();
+        old_fsuid = old->fsuid;
 
-        if (uid == current->uid || uid == current->euid ||
-            uid == current->suid || uid == current->fsuid || 
+        if (security_task_setuid(uid, (uid_t)-1, (uid_t)-1, LSM_SETID_FS) < 0)
+                goto error;
+
+        if (uid == old->uid  || uid == old->euid  ||
+            uid == old->suid || uid == old->fsuid ||
             capable(CAP_SETUID)) {
                 if (uid != old_fsuid) {
-                        set_dumpable(current->mm, suid_dumpable);
-                        smp_wmb();
+                        new->fsuid = uid;
+                        if (security_task_fix_setuid(new, old, LSM_SETID_FS) == 0)
+                                goto change_okay;
                 }
-                current->fsuid = uid;
         }
 
-        key_fsuid_changed(current);
-        proc_id_connector(current, PROC_EVENT_UID);
-
-        security_task_post_setuid(old_fsuid, (uid_t)-1, (uid_t)-1, LSM_SETID_FS);
+error:
+        abort_creds(new);
+        return old_fsuid;
 
+change_okay:
+        commit_creds(new);
         return old_fsuid;
 }
 
@@ -833,23 +871,34 @@ asmlinkage long sys_setfsuid(uid_t uid)
  */
 asmlinkage long sys_setfsgid(gid_t gid)
 {
-        int old_fsgid;
+        const struct cred *old;
+        struct cred *new;
+        gid_t old_fsgid;
+
+        new = prepare_creds();
+        if (!new)
+                return current_fsgid();
+        old = current_cred();
+        old_fsgid = old->fsgid;
 
-        old_fsgid = current->fsgid;
         if (security_task_setgid(gid, (gid_t)-1, (gid_t)-1, LSM_SETID_FS))
-                return old_fsgid;
+                goto error;
 
-        if (gid == current->gid || gid == current->egid ||
-            gid == current->sgid || gid == current->fsgid || 
+        if (gid == old->gid  || gid == old->egid  ||
+            gid == old->sgid || gid == old->fsgid ||
             capable(CAP_SETGID)) {
                 if (gid != old_fsgid) {
-                        set_dumpable(current->mm, suid_dumpable);
-                        smp_wmb();
+                        new->fsgid = gid;
+                        goto change_okay;
                 }
-                current->fsgid = gid;
-                key_fsgid_changed(current);
-                proc_id_connector(current, PROC_EVENT_GID);
         }
+
+error:
+        abort_creds(new);
+        return old_fsgid;
+
+change_okay:
+        commit_creds(new);
         return old_fsgid;
 }
 
@@ -1118,7 +1167,7 @@ EXPORT_SYMBOL(groups_free);
 
 /* export the group_info to a user-space array */
 static int groups_to_user(gid_t __user *grouplist,
-    struct group_info *group_info)
+                          const struct group_info *group_info)
 {
         int i;
         unsigned int count = group_info->ngroups;
@@ -1186,7 +1235,7 @@ static void groups_sort(struct group_info *group_info)
 }
 
 /* a simple bsearch */
-int groups_search(struct group_info *group_info, gid_t grp)
+int groups_search(const struct group_info *group_info, gid_t grp)
 {
         unsigned int left, right;
 
@@ -1208,51 +1257,74 @@ int groups_search(struct group_info *group_info, gid_t grp)
         return 0;
 }
 
-/* validate and set current->group_info */
-int set_current_groups(struct group_info *group_info)
+/**
+ * set_groups - Change a group subscription in a set of credentials
+ * @new: The newly prepared set of credentials to alter
+ * @group_info: The group list to install
+ *
+ * Validate a group subscription and, if valid, insert it into a set
+ * of credentials.
+ */
+int set_groups(struct cred *new, struct group_info *group_info)
 {
         int retval;
-        struct group_info *old_info;
 
         retval = security_task_setgroups(group_info);
         if (retval)
                 return retval;
 
+        put_group_info(new->group_info);
         groups_sort(group_info);
         get_group_info(group_info);
+        new->group_info = group_info;
+        return 0;
+}
+
+EXPORT_SYMBOL(set_groups);
 
-        task_lock(current);
-        old_info = current->group_info;
-        current->group_info = group_info;
-        task_unlock(current);
+/**
+ * set_current_groups - Change current's group subscription
+ * @group_info: The group list to impose
+ *
+ * Validate a group subscription and, if valid, impose it upon current's task
+ * security record.
+ */
+int set_current_groups(struct group_info *group_info)
+{
+        struct cred *new;
+        int ret;
 
-        put_group_info(old_info);
+        new = prepare_creds();
+        if (!new)
+                return -ENOMEM;
 
-        return 0;
+        ret = set_groups(new, group_info);
+        if (ret < 0) {
+                abort_creds(new);
+                return ret;
+        }
+
+        return commit_creds(new);
 }
 
 EXPORT_SYMBOL(set_current_groups);
 
 asmlinkage long sys_getgroups(int gidsetsize, gid_t __user *grouplist)
 {
-        int i = 0;
-
-        /*
-         *      SMP: Nobody else can change our grouplist. Thus we are
-         *      safe.
-         */
+        const struct cred *cred = current_cred();
+        int i;
 
         if (gidsetsize < 0)
                 return -EINVAL;
 
         /* no need to grab task_lock here; it cannot change */
-        i = current->group_info->ngroups;
+        i = cred->group_info->ngroups;
         if (gidsetsize) {
                 if (i > gidsetsize) {
                         i = -EINVAL;
                         goto out;
                 }
-                if (groups_to_user(grouplist, current->group_info)) {
+                if (groups_to_user(grouplist, cred->group_info)) {
                         i = -EFAULT;
                         goto out;
                 }
@@ -1296,9 +1368,11 @@ asmlinkage long sys_setgroups(int gidsetsize, gid_t __user *grouplist)
  */
 int in_group_p(gid_t grp)
 {
+        const struct cred *cred = current_cred();
         int retval = 1;
-        if (grp != current->fsgid)
-                retval = groups_search(current->group_info, grp);
+
+        if (grp != cred->fsgid)
+                retval = groups_search(cred->group_info, grp);
         return retval;
 }
 
@@ -1306,9 +1380,11 @@ EXPORT_SYMBOL(in_group_p);
 
 int in_egroup_p(gid_t grp)
 {
+        const struct cred *cred = current_cred();
         int retval = 1;
-        if (grp != current->egid)
-                retval = groups_search(current->group_info, grp);
+
+        if (grp != cred->egid)
+                retval = groups_search(cred->group_info, grp);
         return retval;
 }
 
@@ -1624,50 +1700,56 @@ asmlinkage long sys_umask(int mask)
 asmlinkage long sys_prctl(int option, unsigned long arg2, unsigned long arg3,
                           unsigned long arg4, unsigned long arg5)
 {
-        long error = 0;
+        struct task_struct *me = current;
+        unsigned char comm[sizeof(me->comm)];
+        long error;
 
-        if (security_task_prctl(option, arg2, arg3, arg4, arg5, &error))
+        error = security_task_prctl(option, arg2, arg3, arg4, arg5);
+        if (error != -ENOSYS)
                 return error;
 
+        error = 0;
         switch (option) {
                 case PR_SET_PDEATHSIG:
                         if (!valid_signal(arg2)) {
                                 error = -EINVAL;
                                 break;
                         }
-                        current->pdeath_signal = arg2;
+                        me->pdeath_signal = arg2;
+                        error = 0;
                         break;
                 case PR_GET_PDEATHSIG:
-                        error = put_user(current->pdeath_signal, (int __user *)arg2);
+                        error = put_user(me->pdeath_signal, (int __user *)arg2);
                         break;
                 case PR_GET_DUMPABLE:
-                        error = get_dumpable(current->mm);
+                        error = get_dumpable(me->mm);
                         break;
                 case PR_SET_DUMPABLE:
                         if (arg2 < 0 || arg2 > 1) {
                                 error = -EINVAL;
                                 break;
                         }
-                        set_dumpable(current->mm, arg2);
+                        set_dumpable(me->mm, arg2);
+                        error = 0;
                         break;
 
                 case PR_SET_UNALIGN:
-                        error = SET_UNALIGN_CTL(current, arg2);
+                        error = SET_UNALIGN_CTL(me, arg2);
                         break;
                 case PR_GET_UNALIGN:
-                        error = GET_UNALIGN_CTL(current, arg2);
+                        error = GET_UNALIGN_CTL(me, arg2);
                         break;
                 case PR_SET_FPEMU:
-                        error = SET_FPEMU_CTL(current, arg2);
+                        error = SET_FPEMU_CTL(me, arg2);
                         break;
                 case PR_GET_FPEMU:
-                        error = GET_FPEMU_CTL(current, arg2);
+                        error = GET_FPEMU_CTL(me, arg2);
                         break;
                 case PR_SET_FPEXC:
-                        error = SET_FPEXC_CTL(current, arg2);
+                        error = SET_FPEXC_CTL(me, arg2);
                         break;
                 case PR_GET_FPEXC:
-                        error = GET_FPEXC_CTL(current, arg2);
+                        error = GET_FPEXC_CTL(me, arg2);
                         break;
                 case PR_GET_TIMING:
                         error = PR_TIMING_STATISTICAL;
@@ -1675,33 +1757,28 @@ asmlinkage long sys_prctl(int option, unsigned long arg2, unsigned long arg3,
                 case PR_SET_TIMING:
                         if (arg2 != PR_TIMING_STATISTICAL)
                                 error = -EINVAL;
+                        else
+                                error = 0;
                         break;
 
-                case PR_SET_NAME: {
-                        struct task_struct *me = current;
-                        unsigned char ncomm[sizeof(me->comm)];
-
-                        ncomm[sizeof(me->comm)-1] = 0;
-                        if (strncpy_from_user(ncomm, (char __user *)arg2,
-                                                sizeof(me->comm)-1) < 0)
+                case PR_SET_NAME:
+                        comm[sizeof(me->comm)-1] = 0;
+                        if (strncpy_from_user(comm, (char __user *)arg2,
+                                              sizeof(me->comm) - 1) < 0)
                                 return -EFAULT;
-                        set_task_comm(me, ncomm);
+                        set_task_comm(me, comm);
                         return 0;
-                }
-                case PR_GET_NAME: {
-                        struct task_struct *me = current;
-                        unsigned char tcomm[sizeof(me->comm)];
-
-                        get_task_comm(tcomm, me);
-                        if (copy_to_user((char __user *)arg2, tcomm, sizeof(tcomm)))
+                case PR_GET_NAME:
+                        get_task_comm(comm, me);
+                        if (copy_to_user((char __user *)arg2, comm,
+                                         sizeof(comm)))
                                 return -EFAULT;
                         return 0;
-                }
                 case PR_GET_ENDIAN:
-                        error = GET_ENDIAN(current, arg2);
+                        error = GET_ENDIAN(me, arg2);
                         break;
                 case PR_SET_ENDIAN:
-                        error = SET_ENDIAN(current, arg2);
+                        error = SET_ENDIAN(me, arg2);
                         break;
 
                 case PR_GET_SECCOMP:
@@ -1725,6 +1802,7 @@ asmlinkage long sys_prctl(int option, unsigned long arg2, unsigned long arg3,
                                         current->default_timer_slack_ns;
                         else
                                 current->timer_slack_ns = arg2;
+                        error = 0;
                         break;
                 default:
                         error = -EINVAL;
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 3d56fe7570da..9d52b57310af 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -1651,7 +1651,7 @@ out:
 
 static int test_perm(int mode, int op)
 {
-        if (!current->euid)
+        if (!current_euid())
                 mode >>= 6;
         else if (in_egroup_p(0))
                 mode >>= 3;
diff --git a/kernel/timer.c b/kernel/timer.c
index dbd50fabe4c7..566257d1dc10 100644
--- a/kernel/timer.c
+++ b/kernel/timer.c
@@ -1192,25 +1192,25 @@ asmlinkage long sys_getppid(void)
 asmlinkage long sys_getuid(void)
 {
         /* Only we change this so SMP safe */
-        return current->uid;
+        return current_uid();
 }
 
 asmlinkage long sys_geteuid(void)
 {
         /* Only we change this so SMP safe */
-        return current->euid;
+        return current_euid();
 }
 
 asmlinkage long sys_getgid(void)
 {
         /* Only we change this so SMP safe */
-        return current->gid;
+        return current_gid();
 }
 
 asmlinkage long sys_getegid(void)
 {
         /* Only we change this so SMP safe */
-        return  current->egid;
+        return  current_egid();
 }
 
 #endif
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index d86e3252f300..1ee9e4e454a0 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -246,7 +246,7 @@ __update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu)
 
         memcpy(data->comm, tsk->comm, TASK_COMM_LEN);
         data->pid = tsk->pid;
-        data->uid = tsk->uid;
+        data->uid = task_uid(tsk);
         data->nice = tsk->static_prio - 20 - MAX_RT_PRIO;
         data->policy = tsk->policy;
         data->rt_priority = tsk->rt_priority;
diff --git a/kernel/tsacct.c b/kernel/tsacct.c
index 8ebcd8532dfb..2dc06ab35716 100644
--- a/kernel/tsacct.c
+++ b/kernel/tsacct.c
@@ -27,6 +27,7 @@
  */
 void bacct_add_tsk(struct taskstats *stats, struct task_struct *tsk)
 {
+        const struct cred *tcred;
         struct timespec uptime, ts;
         u64 ac_etime;
 
@@ -53,10 +54,11 @@ void bacct_add_tsk(struct taskstats *stats, struct task_struct *tsk)
                 stats->ac_flag |= AXSIG;
         stats->ac_nice   = task_nice(tsk);
         stats->ac_sched  = tsk->policy;
-        stats->ac_uid    = tsk->uid;
-        stats->ac_gid    = tsk->gid;
         stats->ac_pid    = tsk->pid;
         rcu_read_lock();
+        tcred = __task_cred(tsk);
+        stats->ac_uid    = tcred->uid;
+        stats->ac_gid    = tcred->gid;
         stats->ac_ppid   = pid_alive(tsk) ?
                                 rcu_dereference(tsk->real_parent)->tgid : 0;
         rcu_read_unlock();
diff --git a/kernel/uid16.c b/kernel/uid16.c
index 3e41c1673e2f..2460c3199b5a 100644
--- a/kernel/uid16.c
+++ b/kernel/uid16.c
@@ -84,11 +84,12 @@ asmlinkage long sys_setresuid16(old_uid_t ruid, old_uid_t euid, old_uid_t suid)
 
 asmlinkage long sys_getresuid16(old_uid_t __user *ruid, old_uid_t __user *euid, old_uid_t __user *suid)
 {
+        const struct cred *cred = current_cred();
         int retval;
 
-        if (!(retval = put_user(high2lowuid(current->uid), ruid)) &&
-            !(retval = put_user(high2lowuid(current->euid), euid)))
-                retval = put_user(high2lowuid(current->suid), suid);
+        if (!(retval   = put_user(high2lowuid(cred->uid),  ruid)) &&
+            !(retval   = put_user(high2lowuid(cred->euid), euid)))
+                retval = put_user(high2lowuid(cred->suid), suid);
 
         return retval;
 }
@@ -104,11 +105,12 @@ asmlinkage long sys_setresgid16(old_gid_t rgid, old_gid_t egid, old_gid_t sgid)
 
 asmlinkage long sys_getresgid16(old_gid_t __user *rgid, old_gid_t __user *egid, old_gid_t __user *sgid)
 {
+        const struct cred *cred = current_cred();
         int retval;
 
-        if (!(retval = put_user(high2lowgid(current->gid), rgid)) &&
-            !(retval = put_user(high2lowgid(current->egid), egid)))
-                retval = put_user(high2lowgid(current->sgid), sgid);
+        if (!(retval   = put_user(high2lowgid(cred->gid),  rgid)) &&
+            !(retval   = put_user(high2lowgid(cred->egid), egid)))
+                retval = put_user(high2lowgid(cred->sgid), sgid);
 
         return retval;
 }
@@ -161,25 +163,24 @@ static int groups16_from_user(struct group_info *group_info,
 
 asmlinkage long sys_getgroups16(int gidsetsize, old_gid_t __user *grouplist)
 {
-        int i = 0;
+        const struct cred *cred = current_cred();
+        int i;
 
         if (gidsetsize < 0)
                 return -EINVAL;
 
-        get_group_info(current->group_info);
-        i = current->group_info->ngroups;
+        i = cred->group_info->ngroups;
         if (gidsetsize) {
                 if (i > gidsetsize) {
                         i = -EINVAL;
                         goto out;
                 }
-                if (groups16_to_user(grouplist, current->group_info)) {
+                if (groups16_to_user(grouplist, cred->group_info)) {
                         i = -EFAULT;
                         goto out;
                 }
         }
 out:
-        put_group_info(current->group_info);
         return i;
 }
 
@@ -210,20 +211,20 @@ asmlinkage long sys_setgroups16(int gidsetsize, old_gid_t __user *grouplist)
 
 asmlinkage long sys_getuid16(void)
 {
-        return high2lowuid(current->uid);
+        return high2lowuid(current_uid());
 }
 
 asmlinkage long sys_geteuid16(void)
 {
-        return high2lowuid(current->euid);
+        return high2lowuid(current_euid());
 }
 
 asmlinkage long sys_getgid16(void)
 {
-        return high2lowgid(current->gid);
+        return high2lowgid(current_gid());
 }
 
 asmlinkage long sys_getegid16(void)
 {
-        return high2lowgid(current->egid);
+        return high2lowgid(current_egid());
 }
diff --git a/kernel/user.c b/kernel/user.c
index 39d6159fae43..6608a3d8ca61 100644
--- a/kernel/user.c
+++ b/kernel/user.c
@@ -16,12 +16,13 @@
 #include <linux/interrupt.h>
 #include <linux/module.h>
 #include <linux/user_namespace.h>
+#include "cred-internals.h"
 
 struct user_namespace init_user_ns = {
         .kref = {
-                .refcount       = ATOMIC_INIT(2),
+                .refcount       = ATOMIC_INIT(1),
         },
-        .root_user = &root_user,
+        .creator = &root_user,
 };
 EXPORT_SYMBOL_GPL(init_user_ns);
 
@@ -47,12 +48,14 @@ static struct kmem_cache *uid_cachep;
  */
 static DEFINE_SPINLOCK(uidhash_lock);
 
+/* root_user.__count is 2, 1 for init task cred, 1 for init_user_ns->creator */
 struct user_struct root_user = {
-        .__count        = ATOMIC_INIT(1),
+        .__count        = ATOMIC_INIT(2),
         .processes      = ATOMIC_INIT(1),
         .files          = ATOMIC_INIT(0),
         .sigpending     = ATOMIC_INIT(0),
         .locked_shm     = 0,
+        .user_ns        = &init_user_ns,
 #ifdef CONFIG_USER_SCHED
         .tg             = &init_task_group,
 #endif
@@ -104,16 +107,10 @@ static int sched_create_user(struct user_struct *up)
         return rc;
 }
 
-static void sched_switch_user(struct task_struct *p)
-{
-        sched_move_task(p);
-}
-
 #else   /* CONFIG_USER_SCHED */
 
 static void sched_destroy_user(struct user_struct *up) { }
 static int sched_create_user(struct user_struct *up) { return 0; }
-static void sched_switch_user(struct task_struct *p) { }
 
 #endif  /* CONFIG_USER_SCHED */
 
@@ -242,13 +239,21 @@ static struct kobj_type uids_ktype = {
         .release = uids_release,
 };
 
-/* create /sys/kernel/uids/<uid>/cpu_share file for this user */
+/*
+ * Create /sys/kernel/uids/<uid>/cpu_share file for this user
+ * We do not create this file for users in a user namespace (until
+ * sysfs tagging is implemented).
+ *
+ * See Documentation/scheduler/sched-design-CFS.txt for ramifications.
+ */
 static int uids_user_create(struct user_struct *up)
 {
         struct kobject *kobj = &up->kobj;
         int error;
 
         memset(kobj, 0, sizeof(struct kobject));
+        if (up->user_ns != &init_user_ns)
+                return 0;
         kobj->kset = uids_kset;
         error = kobject_init_and_add(kobj, &uids_ktype, NULL, "%d", up->uid);
         if (error) {
@@ -284,6 +289,8 @@ static void remove_user_sysfs_dir(struct work_struct *w)
         unsigned long flags;
         int remove_user = 0;
 
+        if (up->user_ns != &init_user_ns)
+                return;
         /* Make uid_hash_remove() + sysfs_remove_file() + kobject_del()
          * atomic.
          */
@@ -319,12 +326,13 @@ done:
  * IRQ state (as stored in flags) is restored and uidhash_lock released
  * upon function exit.
  */
-static inline void free_user(struct user_struct *up, unsigned long flags)
+static void free_user(struct user_struct *up, unsigned long flags)
 {
         /* restore back the count */
         atomic_inc(&up->__count);
         spin_unlock_irqrestore(&uidhash_lock, flags);
 
+        put_user_ns(up->user_ns);
         INIT_WORK(&up->work, remove_user_sysfs_dir);
         schedule_work(&up->work);
 }
@@ -340,13 +348,14 @@ static inline void uids_mutex_unlock(void) { }
  * IRQ state (as stored in flags) is restored and uidhash_lock released
  * upon function exit.
  */
-static inline void free_user(struct user_struct *up, unsigned long flags)
+static void free_user(struct user_struct *up, unsigned long flags)
 {
         uid_hash_remove(up);
         spin_unlock_irqrestore(&uidhash_lock, flags);
         sched_destroy_user(up);
         key_put(up->uid_keyring);
         key_put(up->session_keyring);
+        put_user_ns(up->user_ns);
         kmem_cache_free(uid_cachep, up);
 }
 
@@ -362,7 +371,7 @@ struct user_struct *find_user(uid_t uid)
 {
         struct user_struct *ret;
         unsigned long flags;
-        struct user_namespace *ns = current->nsproxy->user_ns;
+        struct user_namespace *ns = current_user_ns();
 
         spin_lock_irqsave(&uidhash_lock, flags);
         ret = uid_hash_find(uid, uidhashentry(ns, uid));
@@ -409,6 +418,8 @@ struct user_struct *alloc_uid(struct user_namespace *ns, uid_t uid)
                 if (sched_create_user(new) < 0)
                         goto out_free_user;
 
+                new->user_ns = get_user_ns(ns);
+
                 if (uids_user_create(new))
                         goto out_destoy_sched;
 
@@ -432,7 +443,6 @@ struct user_struct *alloc_uid(struct user_namespace *ns, uid_t uid)
                         up = new;
                 }
                 spin_unlock_irq(&uidhash_lock);
-
         }
 
         uids_mutex_unlock();
@@ -441,6 +451,7 @@ struct user_struct *alloc_uid(struct user_namespace *ns, uid_t uid)
 
 out_destoy_sched:
         sched_destroy_user(new);
+        put_user_ns(new->user_ns);
 out_free_user:
         kmem_cache_free(uid_cachep, new);
 out_unlock:
@@ -448,63 +459,6 @@ out_unlock:
         return NULL;
 }
 
-void switch_uid(struct user_struct *new_user)
-{
-        struct user_struct *old_user;
-
-        /* What if a process setreuid()'s and this brings the
-         * new uid over his NPROC rlimit?  We can check this now
-         * cheaply with the new uid cache, so if it matters
-         * we should be checking for it.  -DaveM
-         */
-        old_user = current->user;
-        atomic_inc(&new_user->processes);
-        atomic_dec(&old_user->processes);
-        switch_uid_keyring(new_user);
-        current->user = new_user;
-        sched_switch_user(current);
-
-        /*
-         * We need to synchronize with __sigqueue_alloc()
-         * doing a get_uid(p->user).. If that saw the old
-         * user value, we need to wait until it has exited
-         * its critical region before we can free the old
-         * structure.
-         */
-        smp_mb();
-        spin_unlock_wait(&current->sighand->siglock);
-
-        free_uid(old_user);
-        suid_keys(current);
-}
-
-#ifdef CONFIG_USER_NS
-void release_uids(struct user_namespace *ns)
-{
-        int i;
-        unsigned long flags;
-        struct hlist_head *head;
-        struct hlist_node *nd;
-
-        spin_lock_irqsave(&uidhash_lock, flags);
-        /*
-         * collapse the chains so that the user_struct-s will
-         * be still alive, but not in hashes. subsequent free_uid()
-         * will free them.
-         */
-        for (i = 0; i < UIDHASH_SZ; i++) {
-                head = ns->uidhash_table + i;
-                while (!hlist_empty(head)) {
-                        nd = head->first;
-                        hlist_del_init(nd);
-                }
-        }
-        spin_unlock_irqrestore(&uidhash_lock, flags);
-
-        free_uid(ns->root_user);
-}
-#endif
-
 static int __init uid_cache_init(void)
 {
         int n;
diff --git a/kernel/user_namespace.c b/kernel/user_namespace.c
index 532858fa5b88..79084311ee57 100644
--- a/kernel/user_namespace.c
+++ b/kernel/user_namespace.c
@@ -9,60 +9,55 @@
 #include <linux/nsproxy.h>
 #include <linux/slab.h>
 #include <linux/user_namespace.h>
+#include <linux/cred.h>
 
 /*
- * Clone a new ns copying an original user ns, setting refcount to 1
- * @old_ns: namespace to clone
- * Return NULL on error (failure to kmalloc), new ns otherwise
+ * Create a new user namespace, deriving the creator from the user in the
+ * passed credentials, and replacing that user with the new root user for the
+ * new namespace.
+ *
+ * This is called by copy_creds(), which will finish setting the target task's
+ * credentials.
  */
-static struct user_namespace *clone_user_ns(struct user_namespace *old_ns)
+int create_user_ns(struct cred *new)
 {
         struct user_namespace *ns;
-        struct user_struct *new_user;
+        struct user_struct *root_user;
         int n;
 
         ns = kmalloc(sizeof(struct user_namespace), GFP_KERNEL);
         if (!ns)
-                return ERR_PTR(-ENOMEM);
+                return -ENOMEM;
 
         kref_init(&ns->kref);
 
         for (n = 0; n < UIDHASH_SZ; ++n)
                 INIT_HLIST_HEAD(ns->uidhash_table + n);
 
-        /* Insert new root user.  */
-        ns->root_user = alloc_uid(ns, 0);
-        if (!ns->root_user) {
+        /* Alloc new root user.  */
+        root_user = alloc_uid(ns, 0);
+        if (!root_user) {
                 kfree(ns);
-                return ERR_PTR(-ENOMEM);
+                return -ENOMEM;
         }
 
-        /* Reset current->user with a new one */
-        new_user = alloc_uid(ns, current->uid);
-        if (!new_user) {
-                free_uid(ns->root_user);
-                kfree(ns);
-                return ERR_PTR(-ENOMEM);
-        }
-
-        switch_uid(new_user);
-        return ns;
-}
-
-struct user_namespace * copy_user_ns(int flags, struct user_namespace *old_ns)
-{
-        struct user_namespace *new_ns;
-
-        BUG_ON(!old_ns);
-        get_user_ns(old_ns);
-
-        if (!(flags & CLONE_NEWUSER))
-                return old_ns;
+        /* set the new root user in the credentials under preparation */
+        ns->creator = new->user;
+        new->user = root_user;
+        new->uid = new->euid = new->suid = new->fsuid = 0;
+        new->gid = new->egid = new->sgid = new->fsgid = 0;
+        put_group_info(new->group_info);
+        new->group_info = get_group_info(&init_groups);
+#ifdef CONFIG_KEYS
+        key_put(new->request_key_auth);
+        new->request_key_auth = NULL;
+#endif
+        /* tgcred will be cleared in our caller bc CLONE_THREAD won't be set */
 
-        new_ns = clone_user_ns(old_ns);
+        /* alloc_uid() incremented the userns refcount.  Just set it to 1 */
+        kref_set(&ns->kref, 1);
 
-        put_user_ns(old_ns);
-        return new_ns;
+        return 0;
 }
 
 void free_user_ns(struct kref *kref)
@@ -70,7 +65,7 @@ void free_user_ns(struct kref *kref)
         struct user_namespace *ns;
 
         ns = container_of(kref, struct user_namespace, kref);
-        release_uids(ns);
+        free_uid(ns->creator);
         kfree(ns);
 }
 EXPORT_SYMBOL(free_user_ns);
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index d4dc69ddebd7..4952322cba45 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -84,21 +84,21 @@ static cpumask_t cpu_singlethread_map __read_mostly;
 static cpumask_t cpu_populated_map __read_mostly;
 
 /* If it's single threaded, it isn't in the list of workqueues. */
-static inline int is_single_threaded(struct workqueue_struct *wq)
+static inline int is_wq_single_threaded(struct workqueue_struct *wq)
 {
         return wq->singlethread;
 }
 
 static const cpumask_t *wq_cpu_map(struct workqueue_struct *wq)
 {
-        return is_single_threaded(wq)
+        return is_wq_single_threaded(wq)
                 ? &cpu_singlethread_map : &cpu_populated_map;
 }
 
 static
 struct cpu_workqueue_struct *wq_per_cpu(struct workqueue_struct *wq, int cpu)
 {
-        if (unlikely(is_single_threaded(wq)))
+        if (unlikely(is_wq_single_threaded(wq)))
                 cpu = singlethread_cpu;
         return per_cpu_ptr(wq->cpu_wq, cpu);
 }
@@ -769,7 +769,7 @@ static int create_workqueue_thread(struct cpu_workqueue_struct *cwq, int cpu)
 {
         struct sched_param param = { .sched_priority = MAX_RT_PRIO-1 };
         struct workqueue_struct *wq = cwq->wq;
-        const char *fmt = is_single_threaded(wq) ? "%s" : "%s/%d";
+        const char *fmt = is_wq_single_threaded(wq) ? "%s" : "%s/%d";
         struct task_struct *p;
 
         p = kthread_create(worker_thread, cwq, fmt, wq->name, cpu);
diff --git a/lib/Makefile b/lib/Makefile
index 7cb65d85aeb0..80fe8a3ec12a 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -11,7 +11,7 @@ lib-y := ctype.o string.o vsprintf.o cmdline.o \
          rbtree.o radix-tree.o dump_stack.o \
          idr.o int_sqrt.o extable.o prio_tree.o \
          sha1.o irq_regs.o reciprocal_div.o argv_split.o \
-         proportions.o prio_heap.o ratelimit.o show_mem.o
+         proportions.o prio_heap.o ratelimit.o show_mem.o is_single_threaded.o
 
 lib-$(CONFIG_MMU) += ioremap.o
 lib-$(CONFIG_SMP) += cpumask.o
diff --git a/lib/is_single_threaded.c b/lib/is_single_threaded.c
new file mode 100644
index 000000000000..f1ed2fe76c65
--- /dev/null
+++ b/lib/is_single_threaded.c
@@ -0,0 +1,45 @@
+/* Function to determine if a thread group is single threaded or not
+ *
+ * Copyright (C) 2008 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ * - Derived from security/selinux/hooks.c
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+
+#include <linux/sched.h>
+
+/**
+ * is_single_threaded - Determine if a thread group is single-threaded or not
+ * @p: A task in the thread group in question
+ *
+ * This returns true if the thread group to which a task belongs is single
+ * threaded, false if it is not.
+ */
+bool is_single_threaded(struct task_struct *p)
+{
+        struct task_struct *g, *t;
+        struct mm_struct *mm = p->mm;
+
+        if (atomic_read(&p->signal->count) != 1)
+                goto no;
+
+        if (atomic_read(&p->mm->mm_users) != 1) {
+                read_lock(&tasklist_lock);
+                do_each_thread(g, t) {
+                        if (t->mm == mm && t != p)
+                                goto no_unlock;
+                } while_each_thread(g, t);
+                read_unlock(&tasklist_lock);
+        }
+
+        return true;
+
+no_unlock:
+        read_unlock(&tasklist_lock);
+no:
+        return false;
+}
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index e9493b1c1117..e412ffa8e52e 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -1114,6 +1114,7 @@ asmlinkage long sys_migrate_pages(pid_t pid, unsigned long maxnode,
                 const unsigned long __user *old_nodes,
                 const unsigned long __user *new_nodes)
 {
+        const struct cred *cred = current_cred(), *tcred;
         struct mm_struct *mm;
         struct task_struct *task;
         nodemask_t old;
@@ -1148,12 +1149,16 @@ asmlinkage long sys_migrate_pages(pid_t pid, unsigned long maxnode,
          * capabilities, superuser privileges or the same
          * userid as the target process.
          */
-        if ((current->euid != task->suid) && (current->euid != task->uid) &&
-            (current->uid != task->suid) && (current->uid != task->uid) &&
+        rcu_read_lock();
+        tcred = __task_cred(task);
+        if (cred->euid != tcred->suid && cred->euid != tcred->uid &&
+            cred->uid  != tcred->suid && cred->uid  != tcred->uid &&
             !capable(CAP_SYS_NICE)) {
+                rcu_read_unlock();
                 err = -EPERM;
                 goto out;
         }
+        rcu_read_unlock();
 
         task_nodes = cpuset_mems_allowed(task);
         /* Is the user allowed to access the target nodes? */
diff --git a/mm/migrate.c b/mm/migrate.c
index 037b0967c1e3..21631ab8c08b 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -1075,6 +1075,7 @@ asmlinkage long sys_move_pages(pid_t pid, unsigned long nr_pages,
                         const int __user *nodes,
                         int __user *status, int flags)
 {
+        const struct cred *cred = current_cred(), *tcred;
         struct task_struct *task;
         struct mm_struct *mm;
         int err;
@@ -1105,12 +1106,16 @@ asmlinkage long sys_move_pages(pid_t pid, unsigned long nr_pages,
          * capabilities, superuser privileges or the same
          * userid as the target process.
          */
-        if ((current->euid != task->suid) && (current->euid != task->uid) &&
-            (current->uid != task->suid) && (current->uid != task->uid) &&
+        rcu_read_lock();
+        tcred = __task_cred(task);
+        if (cred->euid != tcred->suid && cred->euid != tcred->uid &&
+            cred->uid  != tcred->suid && cred->uid  != tcred->uid &&
             !capable(CAP_SYS_NICE)) {
+                rcu_read_unlock();
                 err = -EPERM;
                 goto out;
         }
+        rcu_read_unlock();
 
         err = security_task_movememory(task);
         if (err)
diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index a0a01902f551..558f9afe6e4e 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -128,8 +128,8 @@ unsigned long badness(struct task_struct *p, unsigned long uptime)
          * Superuser processes are usually more important, so we make it
          * less likely that we kill those.
          */
-        if (has_capability(p, CAP_SYS_ADMIN) ||
-            has_capability(p, CAP_SYS_RESOURCE))
+        if (has_capability_noaudit(p, CAP_SYS_ADMIN) ||
+            has_capability_noaudit(p, CAP_SYS_RESOURCE))
                 points /= 4;
 
         /*
@@ -138,7 +138,7 @@ unsigned long badness(struct task_struct *p, unsigned long uptime)
          * tend to only have this flag set on applications they think
          * of as important.
          */
-        if (has_capability(p, CAP_SYS_RAWIO))
+        if (has_capability_noaudit(p, CAP_SYS_RAWIO))
                 points /= 4;
 
         /*
@@ -299,9 +299,9 @@ static void dump_tasks(const struct mem_cgroup *mem)
 
                 task_lock(p);
                 printk(KERN_INFO "[%5d] %5d %5d %8lu %8lu %3d     %3d %s\n",
-                       p->pid, p->uid, p->tgid, p->mm->total_vm,
-                       get_mm_rss(p->mm), (int)task_cpu(p), p->oomkilladj,
-                       p->comm);
+                       p->pid, __task_cred(p)->uid, p->tgid,
+                       p->mm->total_vm, get_mm_rss(p->mm), (int)task_cpu(p),
+                       p->oomkilladj, p->comm);
                 task_unlock(p);
         } while_each_thread(g, p);
 }
diff --git a/mm/shmem.c b/mm/shmem.c
index 0ed075215e5f..f1b0d4871f3a 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -1513,8 +1513,8 @@ shmem_get_inode(struct super_block *sb, int mode, dev_t dev)
         inode = new_inode(sb);
         if (inode) {
                 inode->i_mode = mode;
-                inode->i_uid = current->fsuid;
-                inode->i_gid = current->fsgid;
+                inode->i_uid = current_fsuid();
+                inode->i_gid = current_fsgid();
                 inode->i_blocks = 0;
                 inode->i_mapping->backing_dev_info = &shmem_backing_dev_info;
                 inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
@@ -2278,8 +2278,8 @@ static int shmem_fill_super(struct super_block *sb,
         sbinfo->max_blocks = 0;
         sbinfo->max_inodes = 0;
         sbinfo->mode = S_IRWXUGO | S_ISVTX;
-        sbinfo->uid = current->fsuid;
-        sbinfo->gid = current->fsgid;
+        sbinfo->uid = current_fsuid();
+        sbinfo->gid = current_fsgid();
         sbinfo->mpol = NULL;
         sb->s_fs_info = sbinfo;
 
diff --git a/net/9p/client.c b/net/9p/client.c
index 4b529454616d..821f1ec0b2c3 100644
--- a/net/9p/client.c
+++ b/net/9p/client.c
@@ -627,7 +627,7 @@ static struct p9_fid *p9_fid_create(struct p9_client *clnt)
         memset(&fid->qid, 0, sizeof(struct p9_qid));
         fid->mode = -1;
         fid->rdir_fpos = 0;
-        fid->uid = current->fsuid;
+        fid->uid = current_fsuid();
         fid->clnt = clnt;
         fid->aux = NULL;
 
diff --git a/net/ax25/af_ax25.c b/net/ax25/af_ax25.c
index 28c71574a781..00d9e5e13158 100644
--- a/net/ax25/af_ax25.c
+++ b/net/ax25/af_ax25.c
@@ -1045,7 +1045,7 @@ static int ax25_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
         if (addr->fsa_ax25.sax25_family != AF_AX25)
                 return -EINVAL;
 
-        user = ax25_findbyuid(current->euid);
+        user = ax25_findbyuid(current_euid());
         if (user) {
                 call = user->call;
                 ax25_uid_put(user);
diff --git a/net/ax25/ax25_route.c b/net/ax25/ax25_route.c
index 8672cd84fdf9..c833ba4c45a5 100644
--- a/net/ax25/ax25_route.c
+++ b/net/ax25/ax25_route.c
@@ -421,7 +421,7 @@ int ax25_rt_autobind(ax25_cb *ax25, ax25_address *addr)
                 goto put;
         }
 
-        user = ax25_findbyuid(current->euid);
+        user = ax25_findbyuid(current_euid());
         if (user) {
                 ax25->source_addr = user->call;
                 ax25_uid_put(user);
diff --git a/net/core/dev.c b/net/core/dev.c
index 9174c77d3112..89912ae6de65 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2961,6 +2961,8 @@ static void dev_change_rx_flags(struct net_device *dev, int flags)
 static int __dev_set_promiscuity(struct net_device *dev, int inc)
 {
         unsigned short old_flags = dev->flags;
+        uid_t uid;
+        gid_t gid;
 
         ASSERT_RTNL();
 
@@ -2985,15 +2987,17 @@ static int __dev_set_promiscuity(struct net_device *dev, int inc)
                 printk(KERN_INFO "device %s %s promiscuous mode\n",
                        dev->name, (dev->flags & IFF_PROMISC) ? "entered" :
                                                                "left");
-                if (audit_enabled)
+                if (audit_enabled) {
+                        current_uid_gid(&uid, &gid);
                         audit_log(current->audit_context, GFP_ATOMIC,
                                 AUDIT_ANOM_PROMISCUOUS,
                                 "dev=%s prom=%d old_prom=%d auid=%u uid=%u gid=%u ses=%u",
                                 dev->name, (dev->flags & IFF_PROMISC),
                                 (old_flags & IFF_PROMISC),
                                 audit_get_loginuid(current),
-                                current->uid, current->gid,
+                                uid, gid,
                                 audit_get_sessionid(current));
+                }
 
                 dev_change_rx_flags(dev, IFF_PROMISC);
         }
diff --git a/net/core/scm.c b/net/core/scm.c
index b12303dd39d9..b7ba91b074b3 100644
--- a/net/core/scm.c
+++ b/net/core/scm.c
@@ -44,11 +44,13 @@
 
 static __inline__ int scm_check_creds(struct ucred *creds)
 {
+        const struct cred *cred = current_cred();
+
         if ((creds->pid == task_tgid_vnr(current) || capable(CAP_SYS_ADMIN)) &&
-            ((creds->uid == current->uid || creds->uid == current->euid ||
-              creds->uid == current->suid) || capable(CAP_SETUID)) &&
-            ((creds->gid == current->gid || creds->gid == current->egid ||
-              creds->gid == current->sgid) || capable(CAP_SETGID))) {
+            ((creds->uid == cred->uid   || creds->uid == cred->euid ||
+              creds->uid == cred->suid) || capable(CAP_SETUID)) &&
+            ((creds->gid == cred->gid   || creds->gid == cred->egid ||
+              creds->gid == cred->sgid) || capable(CAP_SETGID))) {
                return 0;
         }
         return -EPERM;
diff --git a/net/ipv4/netfilter/ipt_LOG.c b/net/ipv4/netfilter/ipt_LOG.c
index fc6ce04a3e35..7b5dbe118c09 100644
--- a/net/ipv4/netfilter/ipt_LOG.c
+++ b/net/ipv4/netfilter/ipt_LOG.c
@@ -340,8 +340,8 @@ static void dump_packet(const struct nf_loginfo *info,
                 read_lock_bh(&skb->sk->sk_callback_lock);
                 if (skb->sk->sk_socket && skb->sk->sk_socket->file)
                         printk("UID=%u GID=%u ",
-                                skb->sk->sk_socket->file->f_uid,
-                                skb->sk->sk_socket->file->f_gid);
+                                skb->sk->sk_socket->file->f_cred->fsuid,
+                                skb->sk->sk_socket->file->f_cred->fsgid);
                 read_unlock_bh(&skb->sk->sk_callback_lock);
         }
 
diff --git a/net/ipv6/ip6_flowlabel.c b/net/ipv6/ip6_flowlabel.c
index 37a4e777e347..bd3c7b96bbaa 100644
--- a/net/ipv6/ip6_flowlabel.c
+++ b/net/ipv6/ip6_flowlabel.c
@@ -388,7 +388,7 @@ fl_create(struct net *net, struct in6_flowlabel_req *freq, char __user *optval,
                 fl->owner = current->pid;
                 break;
         case IPV6_FL_S_USER:
-                fl->owner = current->euid;
+                fl->owner = current_euid();
                 break;
         default:
                 err = -EINVAL;
diff --git a/net/ipv6/netfilter/ip6t_LOG.c b/net/ipv6/netfilter/ip6t_LOG.c
index caa441d09567..871d157cec4e 100644
--- a/net/ipv6/netfilter/ip6t_LOG.c
+++ b/net/ipv6/netfilter/ip6t_LOG.c
@@ -364,8 +364,8 @@ static void dump_packet(const struct nf_loginfo *info,
                 read_lock_bh(&skb->sk->sk_callback_lock);
                 if (skb->sk->sk_socket && skb->sk->sk_socket->file)
                         printk("UID=%u GID=%u ",
-                                skb->sk->sk_socket->file->f_uid,
-                                skb->sk->sk_socket->file->f_gid);
+                                skb->sk->sk_socket->file->f_cred->fsuid,
+                                skb->sk->sk_socket->file->f_cred->fsgid);
                 read_unlock_bh(&skb->sk->sk_callback_lock);
         }
 
diff --git a/net/netfilter/nfnetlink_log.c b/net/netfilter/nfnetlink_log.c
index 41e0105d3828..38f9efd90e8d 100644
--- a/net/netfilter/nfnetlink_log.c
+++ b/net/netfilter/nfnetlink_log.c
@@ -474,8 +474,9 @@ __build_packet_message(struct nfulnl_instance *inst,
         if (skb->sk) {
                 read_lock_bh(&skb->sk->sk_callback_lock);
                 if (skb->sk->sk_socket && skb->sk->sk_socket->file) {
-                        __be32 uid = htonl(skb->sk->sk_socket->file->f_uid);
-                        __be32 gid = htonl(skb->sk->sk_socket->file->f_gid);
+                        struct file *file = skb->sk->sk_socket->file;
+                        __be32 uid = htonl(file->f_cred->fsuid);
+                        __be32 gid = htonl(file->f_cred->fsgid);
                         /* need to unlock here since NLA_PUT may goto */
                         read_unlock_bh(&skb->sk->sk_callback_lock);
                         NLA_PUT_BE32(inst->skb, NFULA_UID, uid);
diff --git a/net/netfilter/xt_owner.c b/net/netfilter/xt_owner.c
index f19ebd9b78f5..22b2a5e881ea 100644
--- a/net/netfilter/xt_owner.c
+++ b/net/netfilter/xt_owner.c
@@ -34,12 +34,12 @@ owner_mt_v0(const struct sk_buff *skb, const struct xt_match_param *par)
                 return false;
 
         if (info->match & IPT_OWNER_UID)
-                if ((filp->f_uid != info->uid) ^
+                if ((filp->f_cred->fsuid != info->uid) ^
                     !!(info->invert & IPT_OWNER_UID))
                         return false;
 
         if (info->match & IPT_OWNER_GID)
-                if ((filp->f_gid != info->gid) ^
+                if ((filp->f_cred->fsgid != info->gid) ^
                     !!(info->invert & IPT_OWNER_GID))
                         return false;
 
@@ -60,12 +60,12 @@ owner_mt6_v0(const struct sk_buff *skb, const struct xt_match_param *par)
                 return false;
 
         if (info->match & IP6T_OWNER_UID)
-                if ((filp->f_uid != info->uid) ^
+                if ((filp->f_cred->fsuid != info->uid) ^
                     !!(info->invert & IP6T_OWNER_UID))
                         return false;
 
         if (info->match & IP6T_OWNER_GID)
-                if ((filp->f_gid != info->gid) ^
+                if ((filp->f_cred->fsgid != info->gid) ^
                     !!(info->invert & IP6T_OWNER_GID))
                         return false;
 
@@ -93,14 +93,14 @@ owner_mt(const struct sk_buff *skb, const struct xt_match_param *par)
                        (XT_OWNER_UID | XT_OWNER_GID)) == 0;
 
         if (info->match & XT_OWNER_UID)
-                if ((filp->f_uid >= info->uid_min &&
-                    filp->f_uid <= info->uid_max) ^
+                if ((filp->f_cred->fsuid >= info->uid_min &&
+                    filp->f_cred->fsuid <= info->uid_max) ^
                     !(info->invert & XT_OWNER_UID))
                         return false;
 
         if (info->match & XT_OWNER_GID)
-                if ((filp->f_gid >= info->gid_min &&
-                    filp->f_gid <= info->gid_max) ^
+                if ((filp->f_cred->fsgid >= info->gid_min &&
+                    filp->f_cred->fsgid <= info->gid_max) ^
                     !(info->invert & XT_OWNER_GID))
                         return false;
 
diff --git a/net/netrom/af_netrom.c b/net/netrom/af_netrom.c
index 9f1ea4a27b35..e9c05b8f4f45 100644
--- a/net/netrom/af_netrom.c
+++ b/net/netrom/af_netrom.c
@@ -609,7 +609,7 @@ static int nr_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
         } else {
                 source = &addr->fsa_ax25.sax25_call;
 
-                user = ax25_findbyuid(current->euid);
+                user = ax25_findbyuid(current_euid());
                 if (user) {
                         nr->user_addr   = user->call;
                         ax25_uid_put(user);
@@ -683,7 +683,7 @@ static int nr_connect(struct socket *sock, struct sockaddr *uaddr,
                 }
                 source = (ax25_address *)dev->dev_addr;
 
-                user = ax25_findbyuid(current->euid);
+                user = ax25_findbyuid(current_euid());
                 if (user) {
                         nr->user_addr   = user->call;
                         ax25_uid_put(user);
diff --git a/net/rose/af_rose.c b/net/rose/af_rose.c
index 0c1cc7612800..01392649b462 100644
--- a/net/rose/af_rose.c
+++ b/net/rose/af_rose.c
@@ -690,7 +690,7 @@ static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
 
         source = &addr->srose_call;
 
-        user = ax25_findbyuid(current->euid);
+        user = ax25_findbyuid(current_euid());
         if (user) {
                 rose->source_call = user->call;
                 ax25_uid_put(user);
@@ -791,7 +791,7 @@ static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_le
                         goto out_release;
                 }
 
-                user = ax25_findbyuid(current->euid);
+                user = ax25_findbyuid(current_euid());
                 if (!user) {
                         err = -EINVAL;
                         goto out_release;
diff --git a/net/rxrpc/ar-key.c b/net/rxrpc/ar-key.c
index 9a8ff684da79..ad8c7a782da1 100644
--- a/net/rxrpc/ar-key.c
+++ b/net/rxrpc/ar-key.c
@@ -287,6 +287,7 @@ int rxrpc_get_server_data_key(struct rxrpc_connection *conn,
                               time_t expiry,
                               u32 kvno)
 {
+        const struct cred *cred = current_cred();
         struct key *key;
         int ret;
 
@@ -297,7 +298,7 @@ int rxrpc_get_server_data_key(struct rxrpc_connection *conn,
 
         _enter("");
 
-        key = key_alloc(&key_type_rxrpc, "x", 0, 0, current, 0,
+        key = key_alloc(&key_type_rxrpc, "x", 0, 0, cred, 0,
                         KEY_ALLOC_NOT_IN_QUOTA);
         if (IS_ERR(key)) {
                 _leave(" = -ENOMEM [alloc %ld]", PTR_ERR(key));
@@ -340,10 +341,11 @@ EXPORT_SYMBOL(rxrpc_get_server_data_key);
  */
 struct key *rxrpc_get_null_key(const char *keyname)
 {
+        const struct cred *cred = current_cred();
         struct key *key;
         int ret;
 
-        key = key_alloc(&key_type_rxrpc, keyname, 0, 0, current,
+        key = key_alloc(&key_type_rxrpc, keyname, 0, 0, cred,
                         KEY_POS_SEARCH, KEY_ALLOC_NOT_IN_QUOTA);
         if (IS_ERR(key))
                 return key;
diff --git a/net/sched/cls_flow.c b/net/sched/cls_flow.c
index 0ebaff637e31..0ef4e3065bcd 100644
--- a/net/sched/cls_flow.c
+++ b/net/sched/cls_flow.c
@@ -260,14 +260,14 @@ static u32 flow_get_rtclassid(const struct sk_buff *skb)
 static u32 flow_get_skuid(const struct sk_buff *skb)
 {
         if (skb->sk && skb->sk->sk_socket && skb->sk->sk_socket->file)
-                return skb->sk->sk_socket->file->f_uid;
+                return skb->sk->sk_socket->file->f_cred->fsuid;
         return 0;
 }
 
 static u32 flow_get_skgid(const struct sk_buff *skb)
 {
         if (skb->sk && skb->sk->sk_socket && skb->sk->sk_socket->file)
-                return skb->sk->sk_socket->file->f_gid;
+                return skb->sk->sk_socket->file->f_cred->fsgid;
         return 0;
 }
 
diff --git a/net/socket.c b/net/socket.c
index 76ba80aeac1a..072e2e525ae6 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -491,8 +491,8 @@ static struct socket *sock_alloc(void)
         sock = SOCKET_I(inode);
 
         inode->i_mode = S_IFSOCK | S_IRWXUGO;
-        inode->i_uid = current->fsuid;
-        inode->i_gid = current->fsgid;
+        inode->i_uid = current_fsuid();
+        inode->i_gid = current_fsgid();
 
         get_cpu_var(sockets_in_use)++;
         put_cpu_var(sockets_in_use);
diff --git a/net/sunrpc/auth.c b/net/sunrpc/auth.c
index cb216b2df666..0443f8349458 100644
--- a/net/sunrpc/auth.c
+++ b/net/sunrpc/auth.c
@@ -350,16 +350,18 @@ EXPORT_SYMBOL_GPL(rpcauth_lookup_credcache);
 struct rpc_cred *
 rpcauth_lookupcred(struct rpc_auth *auth, int flags)
 {
-        struct auth_cred acred = {
-                .uid = current->fsuid,
-                .gid = current->fsgid,
-                .group_info = current->group_info,
-        };
+        struct auth_cred acred;
         struct rpc_cred *ret;
+        const struct cred *cred = current_cred();
 
         dprintk("RPC:       looking up %s cred\n",
                 auth->au_ops->au_name);
-        get_group_info(acred.group_info);
+
+        memset(&acred, 0, sizeof(acred));
+        acred.uid = cred->fsuid;
+        acred.gid = cred->fsgid;
+        acred.group_info = get_group_info(((struct cred *)cred)->group_info);
+
         ret = auth->au_ops->lookup_cred(auth, &acred, flags);
         put_group_info(acred.group_info);
         return ret;
diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index 66d5ac4773ab..b152e2b9b988 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -467,8 +467,7 @@ static int unix_listen(struct socket *sock, int backlog)
         sk->sk_state            = TCP_LISTEN;
         /* set credentials so connect can copy them */
         sk->sk_peercred.pid     = task_tgid_vnr(current);
-        sk->sk_peercred.uid     = current->euid;
-        sk->sk_peercred.gid     = current->egid;
+        current_euid_egid(&sk->sk_peercred.uid, &sk->sk_peercred.gid);
         err = 0;
 
 out_unlock:
@@ -1126,8 +1125,7 @@ restart:
         newsk->sk_state         = TCP_ESTABLISHED;
         newsk->sk_type          = sk->sk_type;
         newsk->sk_peercred.pid  = task_tgid_vnr(current);
-        newsk->sk_peercred.uid  = current->euid;
-        newsk->sk_peercred.gid  = current->egid;
+        current_euid_egid(&newsk->sk_peercred.uid, &newsk->sk_peercred.gid);
         newu = unix_sk(newsk);
         newsk->sk_sleep         = &newu->peer_wait;
         otheru = unix_sk(other);
@@ -1187,8 +1185,9 @@ static int unix_socketpair(struct socket *socka, struct socket *sockb)
         unix_peer(ska)=skb;
         unix_peer(skb)=ska;
         ska->sk_peercred.pid = skb->sk_peercred.pid = task_tgid_vnr(current);
-        ska->sk_peercred.uid = skb->sk_peercred.uid = current->euid;
-        ska->sk_peercred.gid = skb->sk_peercred.gid = current->egid;
+        current_euid_egid(&skb->sk_peercred.uid, &skb->sk_peercred.gid);
+        ska->sk_peercred.uid = skb->sk_peercred.uid;
+        ska->sk_peercred.gid = skb->sk_peercred.gid;
 
         if (ska->sk_type != SOCK_DGRAM) {
                 ska->sk_state = TCP_ESTABLISHED;
diff --git a/security/capability.c b/security/capability.c
index 245874819036..2dce66fcb992 100644
--- a/security/capability.c
+++ b/security/capability.c
@@ -32,24 +32,19 @@ static int cap_quota_on(struct dentry *dentry)
         return 0;
 }
 
-static int cap_bprm_alloc_security(struct linux_binprm *bprm)
+static int cap_bprm_check_security (struct linux_binprm *bprm)
 {
         return 0;
 }
 
-static void cap_bprm_free_security(struct linux_binprm *bprm)
+static void cap_bprm_committing_creds(struct linux_binprm *bprm)
 {
 }
 
-static void cap_bprm_post_apply_creds(struct linux_binprm *bprm)
+static void cap_bprm_committed_creds(struct linux_binprm *bprm)
 {
 }
 
-static int cap_bprm_check_security(struct linux_binprm *bprm)
-{
-        return 0;
-}
-
 static int cap_sb_alloc_security(struct super_block *sb)
 {
         return 0;
@@ -64,7 +59,7 @@ static int cap_sb_copy_data(char *orig, char *copy)
         return 0;
 }
 
-static int cap_sb_kern_mount(struct super_block *sb, void *data)
+static int cap_sb_kern_mount(struct super_block *sb, int flags, void *data)
 {
         return 0;
 }
@@ -330,7 +325,7 @@ static int cap_file_receive(struct file *file)
         return 0;
 }
 
-static int cap_dentry_open(struct file *file)
+static int cap_dentry_open(struct file *file, const struct cred *cred)
 {
         return 0;
 }
@@ -340,15 +335,29 @@ static int cap_task_create(unsigned long clone_flags)
         return 0;
 }
 
-static int cap_task_alloc_security(struct task_struct *p)
+static void cap_cred_free(struct cred *cred)
+{
+}
+
+static int cap_cred_prepare(struct cred *new, const struct cred *old, gfp_t gfp)
 {
         return 0;
 }
 
-static void cap_task_free_security(struct task_struct *p)
+static void cap_cred_commit(struct cred *new, const struct cred *old)
 {
 }
 
+static int cap_kernel_act_as(struct cred *new, u32 secid)
+{
+        return 0;
+}
+
+static int cap_kernel_create_files_as(struct cred *new, struct inode *inode)
+{
+        return 0;
+}
+
 static int cap_task_setuid(uid_t id0, uid_t id1, uid_t id2, int flags)
 {
         return 0;
@@ -750,7 +759,7 @@ static void cap_release_secctx(char *secdata, u32 seclen)
 }
 
 #ifdef CONFIG_KEYS
-static int cap_key_alloc(struct key *key, struct task_struct *ctx,
+static int cap_key_alloc(struct key *key, const struct cred *cred,
                          unsigned long flags)
 {
         return 0;
@@ -760,7 +769,7 @@ static void cap_key_free(struct key *key)
 {
 }
 
-static int cap_key_permission(key_ref_t key_ref, struct task_struct *context,
+static int cap_key_permission(key_ref_t key_ref, const struct cred *cred,
                               key_perm_t perm)
 {
         return 0;
@@ -814,8 +823,7 @@ void security_fixup_ops(struct security_operations *ops)
         set_to_cap_if_null(ops, ptrace_may_access);
         set_to_cap_if_null(ops, ptrace_traceme);
         set_to_cap_if_null(ops, capget);
-        set_to_cap_if_null(ops, capset_check);
-        set_to_cap_if_null(ops, capset_set);
+        set_to_cap_if_null(ops, capset);
         set_to_cap_if_null(ops, acct);
         set_to_cap_if_null(ops, capable);
         set_to_cap_if_null(ops, quotactl);
@@ -824,11 +832,9 @@ void security_fixup_ops(struct security_operations *ops)
         set_to_cap_if_null(ops, syslog);
         set_to_cap_if_null(ops, settime);
         set_to_cap_if_null(ops, vm_enough_memory);
-        set_to_cap_if_null(ops, bprm_alloc_security);
-        set_to_cap_if_null(ops, bprm_free_security);
-        set_to_cap_if_null(ops, bprm_apply_creds);
-        set_to_cap_if_null(ops, bprm_post_apply_creds);
-        set_to_cap_if_null(ops, bprm_set_security);
+        set_to_cap_if_null(ops, bprm_set_creds);
+        set_to_cap_if_null(ops, bprm_committing_creds);
+        set_to_cap_if_null(ops, bprm_committed_creds);
         set_to_cap_if_null(ops, bprm_check_security);
         set_to_cap_if_null(ops, bprm_secureexec);
         set_to_cap_if_null(ops, sb_alloc_security);
@@ -890,10 +896,13 @@ void security_fixup_ops(struct security_operations *ops)
         set_to_cap_if_null(ops, file_receive);
         set_to_cap_if_null(ops, dentry_open);
         set_to_cap_if_null(ops, task_create);
-        set_to_cap_if_null(ops, task_alloc_security);
-        set_to_cap_if_null(ops, task_free_security);
+        set_to_cap_if_null(ops, cred_free);
+        set_to_cap_if_null(ops, cred_prepare);
+        set_to_cap_if_null(ops, cred_commit);
+        set_to_cap_if_null(ops, kernel_act_as);
+        set_to_cap_if_null(ops, kernel_create_files_as);
         set_to_cap_if_null(ops, task_setuid);
-        set_to_cap_if_null(ops, task_post_setuid);
+        set_to_cap_if_null(ops, task_fix_setuid);
         set_to_cap_if_null(ops, task_setgid);
         set_to_cap_if_null(ops, task_setpgid);
         set_to_cap_if_null(ops, task_getpgid);
@@ -910,7 +919,6 @@ void security_fixup_ops(struct security_operations *ops)
         set_to_cap_if_null(ops, task_wait);
         set_to_cap_if_null(ops, task_kill);
         set_to_cap_if_null(ops, task_prctl);
-        set_to_cap_if_null(ops, task_reparent_to_init);
         set_to_cap_if_null(ops, task_to_inode);
         set_to_cap_if_null(ops, ipc_permission);
         set_to_cap_if_null(ops, ipc_getsecid);
diff --git a/security/commoncap.c b/security/commoncap.c
index 3976613db829..79713545cd63 100644
--- a/security/commoncap.c
+++ b/security/commoncap.c
@@ -8,6 +8,7 @@
  */
 
 #include <linux/capability.h>
+#include <linux/audit.h>
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
@@ -29,7 +30,7 @@
 
 int cap_netlink_send(struct sock *sk, struct sk_buff *skb)
 {
-        NETLINK_CB(skb).eff_cap = current->cap_effective;
+        NETLINK_CB(skb).eff_cap = current_cap();
         return 0;
 }
 
@@ -39,23 +40,41 @@ int cap_netlink_recv(struct sk_buff *skb, int cap)
                 return -EPERM;
         return 0;
 }
-
 EXPORT_SYMBOL(cap_netlink_recv);
 
-/*
+/**
+ * cap_capable - Determine whether a task has a particular effective capability
+ * @tsk: The task to query
+ * @cap: The capability to check for
+ * @audit: Whether to write an audit message or not
+ *
+ * Determine whether the nominated task has the specified capability amongst
+ * its effective set, returning 0 if it does, -ve if it does not.
+ *
  * NOTE WELL: cap_capable() cannot be used like the kernel's capable()
- * function.  That is, it has the reverse semantics: cap_capable()
- * returns 0 when a task has a capability, but the kernel's capable()
- * returns 1 for this case.
+ * function.  That is, it has the reverse semantics: cap_capable() returns 0
+ * when a task has a capability, but the kernel's capable() returns 1 for this
+ * case.
  */
-int cap_capable (struct task_struct *tsk, int cap)
+int cap_capable(struct task_struct *tsk, int cap, int audit)
 {
+        __u32 cap_raised;
+
         /* Derived from include/linux/sched.h:capable. */
-        if (cap_raised(tsk->cap_effective, cap))
-                return 0;
-        return -EPERM;
+        rcu_read_lock();
+        cap_raised = cap_raised(__task_cred(tsk)->cap_effective, cap);
+        rcu_read_unlock();
+        return cap_raised ? 0 : -EPERM;
 }
 
+/**
+ * cap_settime - Determine whether the current process may set the system clock
+ * @ts: The time to set
+ * @tz: The timezone to set
+ *
+ * Determine whether the current process may set the system clock and timezone
+ * information, returning 0 if permission granted, -ve if denied.
+ */
 int cap_settime(struct timespec *ts, struct timezone *tz)
 {
         if (!capable(CAP_SYS_TIME))
@@ -63,121 +82,157 @@ int cap_settime(struct timespec *ts, struct timezone *tz)
         return 0;
 }
 
+/**
+ * cap_ptrace_may_access - Determine whether the current process may access
+ *                         another
+ * @child: The process to be accessed
+ * @mode: The mode of attachment.
+ *
+ * Determine whether a process may access another, returning 0 if permission
+ * granted, -ve if denied.
+ */
 int cap_ptrace_may_access(struct task_struct *child, unsigned int mode)
 {
-        /* Derived from arch/i386/kernel/ptrace.c:sys_ptrace. */
-        if (cap_issubset(child->cap_permitted, current->cap_permitted))
-                return 0;
-        if (capable(CAP_SYS_PTRACE))
-                return 0;
-        return -EPERM;
+        int ret = 0;
+
+        rcu_read_lock();
+        if (!cap_issubset(__task_cred(child)->cap_permitted,
+                          current_cred()->cap_permitted) &&
+            !capable(CAP_SYS_PTRACE))
+                ret = -EPERM;
+        rcu_read_unlock();
+        return ret;
 }
 
+/**
+ * cap_ptrace_traceme - Determine whether another process may trace the current
+ * @parent: The task proposed to be the tracer
+ *
+ * Determine whether the nominated task is permitted to trace the current
+ * process, returning 0 if permission is granted, -ve if denied.
+ */
 int cap_ptrace_traceme(struct task_struct *parent)
 {
-        /* Derived from arch/i386/kernel/ptrace.c:sys_ptrace. */
-        if (cap_issubset(current->cap_permitted, parent->cap_permitted))
-                return 0;
-        if (has_capability(parent, CAP_SYS_PTRACE))
-                return 0;
-        return -EPERM;
+        int ret = 0;
+
+        rcu_read_lock();
+        if (!cap_issubset(current_cred()->cap_permitted,
+                          __task_cred(parent)->cap_permitted) &&
+            !has_capability(parent, CAP_SYS_PTRACE))
+                ret = -EPERM;
+        rcu_read_unlock();
+        return ret;
 }
 
-int cap_capget (struct task_struct *target, kernel_cap_t *effective,
-                kernel_cap_t *inheritable, kernel_cap_t *permitted)
+/**
+ * cap_capget - Retrieve a task's capability sets
+ * @target: The task from which to retrieve the capability sets
+ * @effective: The place to record the effective set
+ * @inheritable: The place to record the inheritable set
+ * @permitted: The place to record the permitted set
+ *
+ * This function retrieves the capabilities of the nominated task and returns
+ * them to the caller.
+ */
+int cap_capget(struct task_struct *target, kernel_cap_t *effective,
+               kernel_cap_t *inheritable, kernel_cap_t *permitted)
 {
+        const struct cred *cred;
+
         /* Derived from kernel/capability.c:sys_capget. */
-        *effective = target->cap_effective;
-        *inheritable = target->cap_inheritable;
-        *permitted = target->cap_permitted;
+        rcu_read_lock();
+        cred = __task_cred(target);
+        *effective   = cred->cap_effective;
+        *inheritable = cred->cap_inheritable;
+        *permitted   = cred->cap_permitted;
+        rcu_read_unlock();
         return 0;
 }
 
-#ifdef CONFIG_SECURITY_FILE_CAPABILITIES
-
-static inline int cap_block_setpcap(struct task_struct *target)
-{
-        /*
-         * No support for remote process capability manipulation with
-         * filesystem capability support.
-         */
-        return (target != current);
-}
-
+/*
+ * Determine whether the inheritable capabilities are limited to the old
+ * permitted set.  Returns 1 if they are limited, 0 if they are not.
+ */
 static inline int cap_inh_is_capped(void)
 {
-        /*
-         * Return 1 if changes to the inheritable set are limited
-         * to the old permitted set. That is, if the current task
-         * does *not* possess the CAP_SETPCAP capability.
-         */
-        return (cap_capable(current, CAP_SETPCAP) != 0);
-}
-
-static inline int cap_limit_ptraced_target(void) { return 1; }
-
-#else /* ie., ndef CONFIG_SECURITY_FILE_CAPABILITIES */
+#ifdef CONFIG_SECURITY_FILE_CAPABILITIES
 
-static inline int cap_block_setpcap(struct task_struct *t) { return 0; }
-static inline int cap_inh_is_capped(void) { return 1; }
-static inline int cap_limit_ptraced_target(void)
-{
-        return !capable(CAP_SETPCAP);
+        /* they are so limited unless the current task has the CAP_SETPCAP
+         * capability
+         */
+        if (cap_capable(current, CAP_SETPCAP, SECURITY_CAP_AUDIT) == 0)
+                return 0;
+#endif
+        return 1;
 }
 
-#endif /* def CONFIG_SECURITY_FILE_CAPABILITIES */
-
-int cap_capset_check (struct task_struct *target, kernel_cap_t *effective,
-                      kernel_cap_t *inheritable, kernel_cap_t *permitted)
-{
-        if (cap_block_setpcap(target)) {
-                return -EPERM;
-        }
-        if (cap_inh_is_capped()
-            && !cap_issubset(*inheritable,
-                             cap_combine(target->cap_inheritable,
-                                         current->cap_permitted))) {
+/**
+ * cap_capset - Validate and apply proposed changes to current's capabilities
+ * @new: The proposed new credentials; alterations should be made here
+ * @old: The current task's current credentials
+ * @effective: A pointer to the proposed new effective capabilities set
+ * @inheritable: A pointer to the proposed new inheritable capabilities set
+ * @permitted: A pointer to the proposed new permitted capabilities set
+ *
+ * This function validates and applies a proposed mass change to the current
+ * process's capability sets.  The changes are made to the proposed new
+ * credentials, and assuming no error, will be committed by the caller of LSM.
+ */
+int cap_capset(struct cred *new,
+               const struct cred *old,
+               const kernel_cap_t *effective,
+               const kernel_cap_t *inheritable,
+               const kernel_cap_t *permitted)
+{
+        if (cap_inh_is_capped() &&
+            !cap_issubset(*inheritable,
+                          cap_combine(old->cap_inheritable,
+                                      old->cap_permitted)))
                 /* incapable of using this inheritable set */
                 return -EPERM;
-        }
+
         if (!cap_issubset(*inheritable,
-                           cap_combine(target->cap_inheritable,
-                                       current->cap_bset))) {
+                          cap_combine(old->cap_inheritable,
+                                      old->cap_bset)))
                 /* no new pI capabilities outside bounding set */
                 return -EPERM;
-        }
 
         /* verify restrictions on target's new Permitted set */
-        if (!cap_issubset (*permitted,
-                           cap_combine (target->cap_permitted,
-                                        current->cap_permitted))) {
+        if (!cap_issubset(*permitted, old->cap_permitted))
                 return -EPERM;
-        }
 
         /* verify the _new_Effective_ is a subset of the _new_Permitted_ */
-        if (!cap_issubset (*effective, *permitted)) {
+        if (!cap_issubset(*effective, *permitted))
                 return -EPERM;
-        }
 
+        new->cap_effective   = *effective;
+        new->cap_inheritable = *inheritable;
+        new->cap_permitted   = *permitted;
         return 0;
 }
 
-void cap_capset_set (struct task_struct *target, kernel_cap_t *effective,
-                     kernel_cap_t *inheritable, kernel_cap_t *permitted)
-{
-        target->cap_effective = *effective;
-        target->cap_inheritable = *inheritable;
-        target->cap_permitted = *permitted;
-}
-
+/*
+ * Clear proposed capability sets for execve().
+ */
 static inline void bprm_clear_caps(struct linux_binprm *bprm)
 {
-        cap_clear(bprm->cap_post_exec_permitted);
+        cap_clear(bprm->cred->cap_permitted);
         bprm->cap_effective = false;
 }
 
 #ifdef CONFIG_SECURITY_FILE_CAPABILITIES
 
+/**
+ * cap_inode_need_killpriv - Determine if inode change affects privileges
+ * @dentry: The inode/dentry in being changed with change marked ATTR_KILL_PRIV
+ *
+ * Determine if an inode having a change applied that's marked ATTR_KILL_PRIV
+ * affects the security markings on that inode, and if it is, should
+ * inode_killpriv() be invoked or the change rejected?
+ *
+ * Returns 0 if granted; +ve if granted, but inode_killpriv() is required; and
+ * -ve to deny the change.
+ */
 int cap_inode_need_killpriv(struct dentry *dentry)
 {
         struct inode *inode = dentry->d_inode;
@@ -192,6 +247,14 @@ int cap_inode_need_killpriv(struct dentry *dentry)
         return 1;
 }
 
+/**
+ * cap_inode_killpriv - Erase the security markings on an inode
+ * @dentry: The inode/dentry to alter
+ *
+ * Erase the privilege-enhancing security markings on an inode.
+ *
+ * Returns 0 if successful, -ve on error.
+ */
 int cap_inode_killpriv(struct dentry *dentry)
 {
         struct inode *inode = dentry->d_inode;
@@ -202,19 +265,75 @@ int cap_inode_killpriv(struct dentry *dentry)
         return inode->i_op->removexattr(dentry, XATTR_NAME_CAPS);
 }
 
-static inline int cap_from_disk(struct vfs_cap_data *caps,
-                                struct linux_binprm *bprm, unsigned size)
+/*
+ * Calculate the new process capability sets from the capability sets attached
+ * to a file.
+ */
+static inline int bprm_caps_from_vfs_caps(struct cpu_vfs_cap_data *caps,
+                                          struct linux_binprm *bprm,
+                                          bool *effective)
+{
+        struct cred *new = bprm->cred;
+        unsigned i;
+        int ret = 0;
+
+        if (caps->magic_etc & VFS_CAP_FLAGS_EFFECTIVE)
+                *effective = true;
+
+        CAP_FOR_EACH_U32(i) {
+                __u32 permitted = caps->permitted.cap[i];
+                __u32 inheritable = caps->inheritable.cap[i];
+
+                /*
+                 * pP' = (X & fP) | (pI & fI)
+                 */
+                new->cap_permitted.cap[i] =
+                        (new->cap_bset.cap[i] & permitted) |
+                        (new->cap_inheritable.cap[i] & inheritable);
+
+                if (permitted & ~new->cap_permitted.cap[i])
+                        /* insufficient to execute correctly */
+                        ret = -EPERM;
+        }
+
+        /*
+         * For legacy apps, with no internal support for recognizing they
+         * do not have enough capabilities, we return an error if they are
+         * missing some "forced" (aka file-permitted) capabilities.
+         */
+        return *effective ? ret : 0;
+}
+
+/*
+ * Extract the on-exec-apply capability sets for an executable file.
+ */
+int get_vfs_caps_from_disk(const struct dentry *dentry, struct cpu_vfs_cap_data *cpu_caps)
 {
+        struct inode *inode = dentry->d_inode;
         __u32 magic_etc;
         unsigned tocopy, i;
-        int ret;
+        int size;
+        struct vfs_cap_data caps;
+
+        memset(cpu_caps, 0, sizeof(struct cpu_vfs_cap_data));
+
+        if (!inode || !inode->i_op || !inode->i_op->getxattr)
+                return -ENODATA;
+
+        size = inode->i_op->getxattr((struct dentry *)dentry, XATTR_NAME_CAPS, &caps,
+                                   XATTR_CAPS_SZ);
+        if (size == -ENODATA || size == -EOPNOTSUPP)
+                /* no data, that's ok */
+                return -ENODATA;
+        if (size < 0)
+                return size;
 
         if (size < sizeof(magic_etc))
                 return -EINVAL;
 
-        magic_etc = le32_to_cpu(caps->magic_etc);
+        cpu_caps->magic_etc = magic_etc = le32_to_cpu(caps.magic_etc);
 
-        switch ((magic_etc & VFS_CAP_REVISION_MASK)) {
+        switch (magic_etc & VFS_CAP_REVISION_MASK) {
         case VFS_CAP_REVISION_1:
                 if (size != XATTR_CAPS_SZ_1)
                         return -EINVAL;
@@ -229,77 +348,48 @@ static inline int cap_from_disk(struct vfs_cap_data *caps,
                 return -EINVAL;
         }
 
-        if (magic_etc & VFS_CAP_FLAGS_EFFECTIVE) {
-                bprm->cap_effective = true;
-        } else {
-                bprm->cap_effective = false;
-        }
-
-        ret = 0;
-
         CAP_FOR_EACH_U32(i) {
-                __u32 value_cpu;
-
-                if (i >= tocopy) {
-                        /*
-                         * Legacy capability sets have no upper bits
-                         */
-                        bprm->cap_post_exec_permitted.cap[i] = 0;
-                        continue;
-                }
-                /*
-                 * pP' = (X & fP) | (pI & fI)
-                 */
-                value_cpu = le32_to_cpu(caps->data[i].permitted);
-                bprm->cap_post_exec_permitted.cap[i] =
-                        (current->cap_bset.cap[i] & value_cpu) |
-                        (current->cap_inheritable.cap[i] &
-                                le32_to_cpu(caps->data[i].inheritable));
-                if (value_cpu & ~bprm->cap_post_exec_permitted.cap[i]) {
-                        /*
-                         * insufficient to execute correctly
-                         */
-                        ret = -EPERM;
-                }
+                if (i >= tocopy)
+                        break;
+                cpu_caps->permitted.cap[i] = le32_to_cpu(caps.data[i].permitted);
+                cpu_caps->inheritable.cap[i] = le32_to_cpu(caps.data[i].inheritable);
         }
 
-        /*
-         * For legacy apps, with no internal support for recognizing they
-         * do not have enough capabilities, we return an error if they are
-         * missing some "forced" (aka file-permitted) capabilities.
-         */
-        return bprm->cap_effective ? ret : 0;
+        return 0;
 }
 
-/* Locate any VFS capabilities: */
-static int get_file_caps(struct linux_binprm *bprm)
+/*
+ * Attempt to get the on-exec apply capability sets for an executable file from
+ * its xattrs and, if present, apply them to the proposed credentials being
+ * constructed by execve().
+ */
+static int get_file_caps(struct linux_binprm *bprm, bool *effective)
 {
         struct dentry *dentry;
         int rc = 0;
-        struct vfs_cap_data vcaps;
-        struct inode *inode;
+        struct cpu_vfs_cap_data vcaps;
 
         bprm_clear_caps(bprm);
 
+        if (!file_caps_enabled)
+                return 0;
+
         if (bprm->file->f_vfsmnt->mnt_flags & MNT_NOSUID)
                 return 0;
 
         dentry = dget(bprm->file->f_dentry);
-        inode = dentry->d_inode;
-        if (!inode->i_op || !inode->i_op->getxattr)
-                goto out;
 
-        rc = inode->i_op->getxattr(dentry, XATTR_NAME_CAPS, &vcaps,
-                                   XATTR_CAPS_SZ);
-        if (rc == -ENODATA || rc == -EOPNOTSUPP) {
-                /* no data, that's ok */
-                rc = 0;
+        rc = get_vfs_caps_from_disk(dentry, &vcaps);
+        if (rc < 0) {
+                if (rc == -EINVAL)
+                        printk(KERN_NOTICE "%s: get_vfs_caps_from_disk returned %d for %s\n",
+                                __func__, rc, bprm->filename);
+                else if (rc == -ENODATA)
+                        rc = 0;
                 goto out;
         }
-        if (rc < 0)
-                goto out;
 
-        rc = cap_from_disk(&vcaps, bprm, rc);
+        rc = bprm_caps_from_vfs_caps(&vcaps, bprm, effective);
         if (rc == -EINVAL)
                 printk(KERN_NOTICE "%s: cap_from_disk returned %d for %s\n",
                        __func__, rc, bprm->filename);
@@ -323,18 +413,57 @@ int cap_inode_killpriv(struct dentry *dentry)
         return 0;
 }
 
-static inline int get_file_caps(struct linux_binprm *bprm)
+int get_vfs_caps_from_disk(const struct dentry *dentry, struct cpu_vfs_cap_data *cpu_caps)
+{
+        memset(cpu_caps, 0, sizeof(struct cpu_vfs_cap_data));
+        return -ENODATA;
+}
+
+static inline int get_file_caps(struct linux_binprm *bprm, bool *effective)
 {
         bprm_clear_caps(bprm);
         return 0;
 }
 #endif
 
-int cap_bprm_set_security (struct linux_binprm *bprm)
+/*
+ * Determine whether a exec'ing process's new permitted capabilities should be
+ * limited to just what it already has.
+ *
+ * This prevents processes that are being ptraced from gaining access to
+ * CAP_SETPCAP, unless the process they're tracing already has it, and the
+ * binary they're executing has filecaps that elevate it.
+ *
+ *  Returns 1 if they should be limited, 0 if they are not.
+ */
+static inline int cap_limit_ptraced_target(void)
+{
+#ifndef CONFIG_SECURITY_FILE_CAPABILITIES
+        if (capable(CAP_SETPCAP))
+                return 0;
+#endif
+        return 1;
+}
+
+/**
+ * cap_bprm_set_creds - Set up the proposed credentials for execve().
+ * @bprm: The execution parameters, including the proposed creds
+ *
+ * Set up the proposed credentials for a new execution context being
+ * constructed by execve().  The proposed creds in @bprm->cred is altered,
+ * which won't take effect immediately.  Returns 0 if successful, -ve on error.
+ */
+int cap_bprm_set_creds(struct linux_binprm *bprm)
 {
+        const struct cred *old = current_cred();
+        struct cred *new = bprm->cred;
+        bool effective;
         int ret;
 
-        ret = get_file_caps(bprm);
+        effective = false;
+        ret = get_file_caps(bprm, &effective);
+        if (ret < 0)
+                return ret;
 
         if (!issecure(SECURE_NOROOT)) {
                 /*
@@ -342,75 +471,113 @@ int cap_bprm_set_security (struct linux_binprm *bprm)
                  * executables under compatibility mode, we override the
                  * capability sets for the file.
                  *
-                 * If only the real uid is 0, we do not set the effective
-                 * bit.
+                 * If only the real uid is 0, we do not set the effective bit.
                  */
-                if (bprm->e_uid == 0 || current->uid == 0) {
+                if (new->euid == 0 || new->uid == 0) {
                         /* pP' = (cap_bset & ~0) | (pI & ~0) */
-                        bprm->cap_post_exec_permitted = cap_combine(
-                                current->cap_bset, current->cap_inheritable
-                                );
-                        bprm->cap_effective = (bprm->e_uid == 0);
-                        ret = 0;
+                        new->cap_permitted = cap_combine(old->cap_bset,
+                                                         old->cap_inheritable);
                 }
+                if (new->euid == 0)
+                        effective = true;
         }
 
-        return ret;
-}
-
-void cap_bprm_apply_creds (struct linux_binprm *bprm, int unsafe)
-{
-        if (bprm->e_uid != current->uid || bprm->e_gid != current->gid ||
-            !cap_issubset(bprm->cap_post_exec_permitted,
-                          current->cap_permitted)) {
-                set_dumpable(current->mm, suid_dumpable);
-                current->pdeath_signal = 0;
-
-                if (unsafe & ~LSM_UNSAFE_PTRACE_CAP) {
-                        if (!capable(CAP_SETUID)) {
-                                bprm->e_uid = current->uid;
-                                bprm->e_gid = current->gid;
-                        }
-                        if (cap_limit_ptraced_target()) {
-                                bprm->cap_post_exec_permitted = cap_intersect(
-                                        bprm->cap_post_exec_permitted,
-                                        current->cap_permitted);
-                        }
+        /* Don't let someone trace a set[ug]id/setpcap binary with the revised
+         * credentials unless they have the appropriate permit
+         */
+        if ((new->euid != old->uid ||
+             new->egid != old->gid ||
+             !cap_issubset(new->cap_permitted, old->cap_permitted)) &&
+            bprm->unsafe & ~LSM_UNSAFE_PTRACE_CAP) {
+                /* downgrade; they get no more than they had, and maybe less */
+                if (!capable(CAP_SETUID)) {
+                        new->euid = new->uid;
+                        new->egid = new->gid;
                 }
+                if (cap_limit_ptraced_target())
+                        new->cap_permitted = cap_intersect(new->cap_permitted,
+                                                           old->cap_permitted);
         }
 
-        current->suid = current->euid = current->fsuid = bprm->e_uid;
-        current->sgid = current->egid = current->fsgid = bprm->e_gid;
+        new->suid = new->fsuid = new->euid;
+        new->sgid = new->fsgid = new->egid;
 
-        /* For init, we want to retain the capabilities set
-         * in the init_task struct. Thus we skip the usual
-         * capability rules */
+        /* For init, we want to retain the capabilities set in the initial
+         * task.  Thus we skip the usual capability rules
+         */
         if (!is_global_init(current)) {
-                current->cap_permitted = bprm->cap_post_exec_permitted;
-                if (bprm->cap_effective)
-                        current->cap_effective = bprm->cap_post_exec_permitted;
+                if (effective)
+                        new->cap_effective = new->cap_permitted;
                 else
-                        cap_clear(current->cap_effective);
+                        cap_clear(new->cap_effective);
         }
+        bprm->cap_effective = effective;
 
-        /* AUD: Audit candidate if current->cap_effective is set */
+        /*
+         * Audit candidate if current->cap_effective is set
+         *
+         * We do not bother to audit if 3 things are true:
+         *   1) cap_effective has all caps
+         *   2) we are root
+         *   3) root is supposed to have all caps (SECURE_NOROOT)
+         * Since this is just a normal root execing a process.
+         *
+         * Number 1 above might fail if you don't have a full bset, but I think
+         * that is interesting information to audit.
+         */
+        if (!cap_isclear(new->cap_effective)) {
+                if (!cap_issubset(CAP_FULL_SET, new->cap_effective) ||
+                    new->euid != 0 || new->uid != 0 ||
+                    issecure(SECURE_NOROOT)) {
+                        ret = audit_log_bprm_fcaps(bprm, new, old);
+                        if (ret < 0)
+                                return ret;
+                }
+        }
 
-        current->securebits &= ~issecure_mask(SECURE_KEEP_CAPS);
+        new->securebits &= ~issecure_mask(SECURE_KEEP_CAPS);
+        return 0;
 }
 
-int cap_bprm_secureexec (struct linux_binprm *bprm)
+/**
+ * cap_bprm_secureexec - Determine whether a secure execution is required
+ * @bprm: The execution parameters
+ *
+ * Determine whether a secure execution is required, return 1 if it is, and 0
+ * if it is not.
+ *
+ * The credentials have been committed by this point, and so are no longer
+ * available through @bprm->cred.
+ */
+int cap_bprm_secureexec(struct linux_binprm *bprm)
 {
-        if (current->uid != 0) {
+        const struct cred *cred = current_cred();
+
+        if (cred->uid != 0) {
                 if (bprm->cap_effective)
                         return 1;
-                if (!cap_isclear(bprm->cap_post_exec_permitted))
+                if (!cap_isclear(cred->cap_permitted))
                         return 1;
         }
 
-        return (current->euid != current->uid ||
-                current->egid != current->gid);
+        return (cred->euid != cred->uid ||
+                cred->egid != cred->gid);
 }
 
+/**
+ * cap_inode_setxattr - Determine whether an xattr may be altered
+ * @dentry: The inode/dentry being altered
+ * @name: The name of the xattr to be changed
+ * @value: The value that the xattr will be changed to
+ * @size: The size of value
+ * @flags: The replacement flag
+ *
+ * Determine whether an xattr may be altered or set on an inode, returning 0 if
+ * permission is granted, -ve if denied.
+ *
+ * This is used to make sure security xattrs don't get updated or set by those
+ * who aren't privileged to do so.
+ */
 int cap_inode_setxattr(struct dentry *dentry, const char *name,
                        const void *value, size_t size, int flags)
 {
@@ -418,28 +585,42 @@ int cap_inode_setxattr(struct dentry *dentry, const char *name,
                 if (!capable(CAP_SETFCAP))
                         return -EPERM;
                 return 0;
-        } else if (!strncmp(name, XATTR_SECURITY_PREFIX,
+        }
+
+        if (!strncmp(name, XATTR_SECURITY_PREFIX,
                      sizeof(XATTR_SECURITY_PREFIX) - 1)  &&
             !capable(CAP_SYS_ADMIN))
                 return -EPERM;
         return 0;
 }
 
+/**
+ * cap_inode_removexattr - Determine whether an xattr may be removed
+ * @dentry: The inode/dentry being altered
+ * @name: The name of the xattr to be changed
+ *
+ * Determine whether an xattr may be removed from an inode, returning 0 if
+ * permission is granted, -ve if denied.
+ *
+ * This is used to make sure security xattrs don't get removed by those who
+ * aren't privileged to remove them.
+ */
 int cap_inode_removexattr(struct dentry *dentry, const char *name)
 {
         if (!strcmp(name, XATTR_NAME_CAPS)) {
                 if (!capable(CAP_SETFCAP))
                         return -EPERM;
                 return 0;
-        } else if (!strncmp(name, XATTR_SECURITY_PREFIX,
+        }
+
+        if (!strncmp(name, XATTR_SECURITY_PREFIX,
                      sizeof(XATTR_SECURITY_PREFIX) - 1)  &&
             !capable(CAP_SYS_ADMIN))
                 return -EPERM;
         return 0;
 }
 
-/* moved from kernel/sys.c. */
-/* 
+/*
  * cap_emulate_setxuid() fixes the effective / permitted capabilities of
  * a process after a call to setuid, setreuid, or setresuid.
  *
@@ -453,10 +634,10 @@ int cap_inode_removexattr(struct dentry *dentry, const char *name)
  *  3) When set*uiding _from_ euid != 0 _to_ euid == 0, the effective
  *  capabilities are set to the permitted capabilities.
  *
- *  fsuid is handled elsewhere. fsuid == 0 and {r,e,s}uid!= 0 should 
+ *  fsuid is handled elsewhere. fsuid == 0 and {r,e,s}uid!= 0 should
  *  never happen.
  *
- *  -astor 
+ *  -astor
  *
  * cevans - New behaviour, Oct '99
  * A process may, via prctl(), elect to keep its capabilities when it
@@ -468,61 +649,60 @@ int cap_inode_removexattr(struct dentry *dentry, const char *name)
  * files..
  * Thanks to Olaf Kirch and Peter Benie for spotting this.
  */
-static inline void cap_emulate_setxuid (int old_ruid, int old_euid,
-                                        int old_suid)
+static inline void cap_emulate_setxuid(struct cred *new, const struct cred *old)
 {
-        if ((old_ruid == 0 || old_euid == 0 || old_suid == 0) &&
-            (current->uid != 0 && current->euid != 0 && current->suid != 0) &&
+        if ((old->uid == 0 || old->euid == 0 || old->suid == 0) &&
+            (new->uid != 0 && new->euid != 0 && new->suid != 0) &&
             !issecure(SECURE_KEEP_CAPS)) {
-                cap_clear (current->cap_permitted);
-                cap_clear (current->cap_effective);
-        }
-        if (old_euid == 0 && current->euid != 0) {
-                cap_clear (current->cap_effective);
-        }
-        if (old_euid != 0 && current->euid == 0) {
-                current->cap_effective = current->cap_permitted;
+                cap_clear(new->cap_permitted);
+                cap_clear(new->cap_effective);
         }
+        if (old->euid == 0 && new->euid != 0)
+                cap_clear(new->cap_effective);
+        if (old->euid != 0 && new->euid == 0)
+                new->cap_effective = new->cap_permitted;
 }
 
-int cap_task_post_setuid (uid_t old_ruid, uid_t old_euid, uid_t old_suid,
-                          int flags)
+/**
+ * cap_task_fix_setuid - Fix up the results of setuid() call
+ * @new: The proposed credentials
+ * @old: The current task's current credentials
+ * @flags: Indications of what has changed
+ *
+ * Fix up the results of setuid() call before the credential changes are
+ * actually applied, returning 0 to grant the changes, -ve to deny them.
+ */
+int cap_task_fix_setuid(struct cred *new, const struct cred *old, int flags)
 {
         switch (flags) {
         case LSM_SETID_RE:
         case LSM_SETID_ID:
         case LSM_SETID_RES:
-                /* Copied from kernel/sys.c:setreuid/setuid/setresuid. */
-                if (!issecure (SECURE_NO_SETUID_FIXUP)) {
-                        cap_emulate_setxuid (old_ruid, old_euid, old_suid);
-                }
+                /* juggle the capabilities to follow [RES]UID changes unless
+                 * otherwise suppressed */
+                if (!issecure(SECURE_NO_SETUID_FIXUP))
+                        cap_emulate_setxuid(new, old);
                 break;
-        case LSM_SETID_FS:
-                {
-                        uid_t old_fsuid = old_ruid;
 
-                        /* Copied from kernel/sys.c:setfsuid. */
-
-                        /*
-                         * FIXME - is fsuser used for all CAP_FS_MASK capabilities?
-                         *          if not, we might be a bit too harsh here.
-                         */
-
-                        if (!issecure (SECURE_NO_SETUID_FIXUP)) {
-                                if (old_fsuid == 0 && current->fsuid != 0) {
-                                        current->cap_effective =
-                                                cap_drop_fs_set(
-                                                    current->cap_effective);
-                                }
-                                if (old_fsuid != 0 && current->fsuid == 0) {
-                                        current->cap_effective =
-                                                cap_raise_fs_set(
-                                                    current->cap_effective,
-                                                    current->cap_permitted);
-                                }
-                        }
-                        break;
+        case LSM_SETID_FS:
+                /* juggle the capabilties to follow FSUID changes, unless
+                 * otherwise suppressed
+                 *
+                 * FIXME - is fsuser used for all CAP_FS_MASK capabilities?
+                 *          if not, we might be a bit too harsh here.
+                 */
+                if (!issecure(SECURE_NO_SETUID_FIXUP)) {
+                        if (old->fsuid == 0 && new->fsuid != 0)
+                                new->cap_effective =
+                                        cap_drop_fs_set(new->cap_effective);
+
+                        if (old->fsuid != 0 && new->fsuid == 0)
+                                new->cap_effective =
+                                        cap_raise_fs_set(new->cap_effective,
+                                                         new->cap_permitted);
                 }
+                break;
+
         default:
                 return -EINVAL;
         }
@@ -543,42 +723,71 @@ int cap_task_post_setuid (uid_t old_ruid, uid_t old_euid, uid_t old_suid,
  */
 static int cap_safe_nice(struct task_struct *p)
 {
-        if (!cap_issubset(p->cap_permitted, current->cap_permitted) &&
-            !capable(CAP_SYS_NICE))
+        int is_subset;
+
+        rcu_read_lock();
+        is_subset = cap_issubset(__task_cred(p)->cap_permitted,
+                                 current_cred()->cap_permitted);
+        rcu_read_unlock();
+
+        if (!is_subset && !capable(CAP_SYS_NICE))
                 return -EPERM;
         return 0;
 }
 
-int cap_task_setscheduler (struct task_struct *p, int policy,
+/**
+ * cap_task_setscheduler - Detemine if scheduler policy change is permitted
+ * @p: The task to affect
+ * @policy: The policy to effect
+ * @lp: The parameters to the scheduling policy
+ *
+ * Detemine if the requested scheduler policy change is permitted for the
+ * specified task, returning 0 if permission is granted, -ve if denied.
+ */
+int cap_task_setscheduler(struct task_struct *p, int policy,
                            struct sched_param *lp)
 {
         return cap_safe_nice(p);
 }
 
-int cap_task_setioprio (struct task_struct *p, int ioprio)
+/**
+ * cap_task_ioprio - Detemine if I/O priority change is permitted
+ * @p: The task to affect
+ * @ioprio: The I/O priority to set
+ *
+ * Detemine if the requested I/O priority change is permitted for the specified
+ * task, returning 0 if permission is granted, -ve if denied.
+ */
+int cap_task_setioprio(struct task_struct *p, int ioprio)
 {
         return cap_safe_nice(p);
 }
 
-int cap_task_setnice (struct task_struct *p, int nice)
+/**
+ * cap_task_ioprio - Detemine if task priority change is permitted
+ * @p: The task to affect
+ * @nice: The nice value to set
+ *
+ * Detemine if the requested task priority change is permitted for the
+ * specified task, returning 0 if permission is granted, -ve if denied.
+ */
+int cap_task_setnice(struct task_struct *p, int nice)
 {
         return cap_safe_nice(p);
 }
 
 /*
- * called from kernel/sys.c for prctl(PR_CABSET_DROP)
- * done without task_capability_lock() because it introduces
- * no new races - i.e. only another task doing capget() on
- * this task could get inconsistent info.  There can be no
- * racing writer bc a task can only change its own caps.
+ * Implement PR_CAPBSET_DROP.  Attempt to remove the specified capability from
+ * the current task's bounding set.  Returns 0 on success, -ve on error.
  */
-static long cap_prctl_drop(unsigned long cap)
+static long cap_prctl_drop(struct cred *new, unsigned long cap)
 {
         if (!capable(CAP_SETPCAP))
                 return -EPERM;
         if (!cap_valid(cap))
                 return -EINVAL;
-        cap_lower(current->cap_bset, cap);
+
+        cap_lower(new->cap_bset, cap);
         return 0;
 }
 
@@ -598,22 +807,42 @@ int cap_task_setnice (struct task_struct *p, int nice)
 }
 #endif
 
+/**
+ * cap_task_prctl - Implement process control functions for this security module
+ * @option: The process control function requested
+ * @arg2, @arg3, @arg4, @arg5: The argument data for this function
+ *
+ * Allow process control functions (sys_prctl()) to alter capabilities; may
+ * also deny access to other functions not otherwise implemented here.
+ *
+ * Returns 0 or +ve on success, -ENOSYS if this function is not implemented
+ * here, other -ve on error.  If -ENOSYS is returned, sys_prctl() and other LSM
+ * modules will consider performing the function.
+ */
 int cap_task_prctl(int option, unsigned long arg2, unsigned long arg3,
-                   unsigned long arg4, unsigned long arg5, long *rc_p)
+                   unsigned long arg4, unsigned long arg5)
 {
+        struct cred *new;
         long error = 0;
 
+        new = prepare_creds();
+        if (!new)
+                return -ENOMEM;
+
         switch (option) {
         case PR_CAPBSET_READ:
+                error = -EINVAL;
                 if (!cap_valid(arg2))
-                        error = -EINVAL;
-                else
-                        error = !!cap_raised(current->cap_bset, arg2);
-                break;
+                        goto error;
+                error = !!cap_raised(new->cap_bset, arg2);
+                goto no_change;
+
 #ifdef CONFIG_SECURITY_FILE_CAPABILITIES
         case PR_CAPBSET_DROP:
-                error = cap_prctl_drop(arg2);
-                break;
+                error = cap_prctl_drop(new, arg2);
+                if (error < 0)
+                        goto error;
+                goto changed;
 
         /*
          * The next four prctl's remain to assist with transitioning a
@@ -635,12 +864,12 @@ int cap_task_prctl(int option, unsigned long arg2, unsigned long arg3,
          * capability-based-privilege environment.
          */
         case PR_SET_SECUREBITS:
-                if ((((current->securebits & SECURE_ALL_LOCKS) >> 1)
-                     & (current->securebits ^ arg2))                  /*[1]*/
-                    || ((current->securebits & SECURE_ALL_LOCKS
-                         & ~arg2))                                    /*[2]*/
-                    || (arg2 & ~(SECURE_ALL_LOCKS | SECURE_ALL_BITS)) /*[3]*/
-                    || (cap_capable(current, CAP_SETPCAP) != 0)) {    /*[4]*/
+                error = -EPERM;
+                if ((((new->securebits & SECURE_ALL_LOCKS) >> 1)
+                     & (new->securebits ^ arg2))                        /*[1]*/
+                    || ((new->securebits & SECURE_ALL_LOCKS & ~arg2))   /*[2]*/
+                    || (arg2 & ~(SECURE_ALL_LOCKS | SECURE_ALL_BITS))   /*[3]*/
+                    || (cap_capable(current, CAP_SETPCAP, SECURITY_CAP_AUDIT) != 0) /*[4]*/
                         /*
                          * [1] no changing of bits that are locked
                          * [2] no unlocking of locks
@@ -648,65 +877,80 @@ int cap_task_prctl(int option, unsigned long arg2, unsigned long arg3,
                          * [4] doing anything requires privilege (go read about
                          *     the "sendmail capabilities bug")
                          */
-                        error = -EPERM;  /* cannot change a locked bit */
-                } else {
-                        current->securebits = arg2;
-                }
-                break;
+                    )
+                        /* cannot change a locked bit */
+                        goto error;
+                new->securebits = arg2;
+                goto changed;
+
         case PR_GET_SECUREBITS:
-                error = current->securebits;
-                break;
+                error = new->securebits;
+                goto no_change;
 
 #endif /* def CONFIG_SECURITY_FILE_CAPABILITIES */
 
         case PR_GET_KEEPCAPS:
                 if (issecure(SECURE_KEEP_CAPS))
                         error = 1;
-                break;
+                goto no_change;
+
         case PR_SET_KEEPCAPS:
+                error = -EINVAL;
                 if (arg2 > 1) /* Note, we rely on arg2 being unsigned here */
-                        error = -EINVAL;
-                else if (issecure(SECURE_KEEP_CAPS_LOCKED))
-                        error = -EPERM;
-                else if (arg2)
-                        current->securebits |= issecure_mask(SECURE_KEEP_CAPS);
+                        goto error;
+                error = -EPERM;
+                if (issecure(SECURE_KEEP_CAPS_LOCKED))
+                        goto error;
+                if (arg2)
+                        new->securebits |= issecure_mask(SECURE_KEEP_CAPS);
                 else
-                        current->securebits &=
-                                ~issecure_mask(SECURE_KEEP_CAPS);
-                break;
+                        new->securebits &= ~issecure_mask(SECURE_KEEP_CAPS);
+                goto changed;
 
         default:
                 /* No functionality available - continue with default */
-                return 0;
+                error = -ENOSYS;
+                goto error;
         }
 
         /* Functionality provided */
-        *rc_p = error;
-        return 1;
-}
+changed:
+        return commit_creds(new);
 
-void cap_task_reparent_to_init (struct task_struct *p)
-{
-        cap_set_init_eff(p->cap_effective);
-        cap_clear(p->cap_inheritable);
-        cap_set_full(p->cap_permitted);
-        p->securebits = SECUREBITS_DEFAULT;
-        return;
+no_change:
+        error = 0;
+error:
+        abort_creds(new);
+        return error;
 }
 
-int cap_syslog (int type)
+/**
+ * cap_syslog - Determine whether syslog function is permitted
+ * @type: Function requested
+ *
+ * Determine whether the current process is permitted to use a particular
+ * syslog function, returning 0 if permission is granted, -ve if not.
+ */
+int cap_syslog(int type)
 {
         if ((type != 3 && type != 10) && !capable(CAP_SYS_ADMIN))
                 return -EPERM;
         return 0;
 }
 
+/**
+ * cap_vm_enough_memory - Determine whether a new virtual mapping is permitted
+ * @mm: The VM space in which the new mapping is to be made
+ * @pages: The size of the mapping
+ *
+ * Determine whether the allocation of a new virtual mapping by the current
+ * task is permitted, returning 0 if permission is granted, -ve if not.
+ */
 int cap_vm_enough_memory(struct mm_struct *mm, long pages)
 {
         int cap_sys_admin = 0;
 
-        if (cap_capable(current, CAP_SYS_ADMIN) == 0)
+        if (cap_capable(current, CAP_SYS_ADMIN, SECURITY_CAP_NOAUDIT) == 0)
                 cap_sys_admin = 1;
         return __vm_enough_memory(mm, pages, cap_sys_admin);
 }
-
diff --git a/security/keys/internal.h b/security/keys/internal.h
index 239098f0fd76..81932abefe7b 100644
--- a/security/keys/internal.h
+++ b/security/keys/internal.h
@@ -12,8 +12,8 @@
 #ifndef _INTERNAL_H
 #define _INTERNAL_H
 
+#include <linux/sched.h>
 #include <linux/key-type.h>
-#include <linux/key-ui.h>
 
 static inline __attribute__((format(printf, 1, 2)))
 void no_printk(const char *fmt, ...)
@@ -26,7 +26,7 @@ void no_printk(const char *fmt, ...)
 #define kleave(FMT, ...) \
         printk(KERN_DEBUG "<== %s()"FMT"\n", __func__, ##__VA_ARGS__)
 #define kdebug(FMT, ...) \
-        printk(KERN_DEBUG "xxx" FMT"yyy\n", ##__VA_ARGS__)
+        printk(KERN_DEBUG "   "FMT"\n", ##__VA_ARGS__)
 #else
 #define kenter(FMT, ...) \
         no_printk(KERN_DEBUG "==> %s("FMT")\n", __func__, ##__VA_ARGS__)
@@ -82,6 +82,9 @@ extern struct mutex key_construction_mutex;
 extern wait_queue_head_t request_key_conswq;
 
 
+extern struct key_type *key_type_lookup(const char *type);
+extern void key_type_put(struct key_type *ktype);
+
 extern int __key_link(struct key *keyring, struct key *key);
 
 extern key_ref_t __keyring_search_one(key_ref_t keyring_ref,
@@ -95,7 +98,7 @@ extern struct key *keyring_search_instkey(struct key *keyring,
 typedef int (*key_match_func_t)(const struct key *, const void *);
 
 extern key_ref_t keyring_search_aux(key_ref_t keyring_ref,
-                                    struct task_struct *tsk,
+                                    const struct cred *cred,
                                     struct key_type *type,
                                     const void *description,
                                     key_match_func_t match);
@@ -103,13 +106,13 @@ extern key_ref_t keyring_search_aux(key_ref_t keyring_ref,
 extern key_ref_t search_process_keyrings(struct key_type *type,
                                          const void *description,
                                          key_match_func_t match,
-                                         struct task_struct *tsk);
+                                         const struct cred *cred);
 
 extern struct key *find_keyring_by_name(const char *name, bool skip_perm_check);
 
-extern int install_user_keyrings(struct task_struct *tsk);
-extern int install_thread_keyring(struct task_struct *tsk);
-extern int install_process_keyring(struct task_struct *tsk);
+extern int install_user_keyrings(void);
+extern int install_thread_keyring_to_cred(struct cred *);
+extern int install_process_keyring_to_cred(struct cred *);
 
 extern struct key *request_key_and_link(struct key_type *type,
                                         const char *description,
@@ -119,12 +122,39 @@ extern struct key *request_key_and_link(struct key_type *type,
                                         struct key *dest_keyring,
                                         unsigned long flags);
 
+extern key_ref_t lookup_user_key(key_serial_t id, int create, int partial,
+                                 key_perm_t perm);
+
+extern long join_session_keyring(const char *name);
+
+/*
+ * check to see whether permission is granted to use a key in the desired way
+ */
+extern int key_task_permission(const key_ref_t key_ref,
+                               const struct cred *cred,
+                               key_perm_t perm);
+
+static inline int key_permission(const key_ref_t key_ref, key_perm_t perm)
+{
+        return key_task_permission(key_ref, current_cred(), perm);
+}
+
+/* required permissions */
+#define KEY_VIEW        0x01    /* require permission to view attributes */
+#define KEY_READ        0x02    /* require permission to read content */
+#define KEY_WRITE       0x04    /* require permission to update / modify */
+#define KEY_SEARCH      0x08    /* require permission to search (keyring) or find (key) */
+#define KEY_LINK        0x10    /* require permission to link */
+#define KEY_SETATTR     0x20    /* require permission to change attributes */
+#define KEY_ALL         0x3f    /* all the above permissions */
+
 /*
  * request_key authorisation
  */
 struct request_key_auth {
         struct key              *target_key;
-        struct task_struct      *context;
+        struct key              *dest_keyring;
+        const struct cred       *cred;
         void                    *callout_info;
         size_t                  callout_len;
         pid_t                   pid;
@@ -133,7 +163,8 @@ struct request_key_auth {
 extern struct key_type key_type_request_key_auth;
 extern struct key *request_key_auth_new(struct key *target,
                                         const void *callout_info,
-                                        size_t callout_len);
+                                        size_t callout_len,
+                                        struct key *dest_keyring);
 
 extern struct key *key_get_instantiation_authkey(key_serial_t target_id);
 
diff --git a/security/keys/key.c b/security/keys/key.c
index 14948cf83ef6..f76c8a546fd3 100644
--- a/security/keys/key.c
+++ b/security/keys/key.c
@@ -218,7 +218,7 @@ serial_exists:
  *   instantiate the key or discard it before returning
  */
 struct key *key_alloc(struct key_type *type, const char *desc,
-                      uid_t uid, gid_t gid, struct task_struct *ctx,
+                      uid_t uid, gid_t gid, const struct cred *cred,
                       key_perm_t perm, unsigned long flags)
 {
         struct key_user *user = NULL;
@@ -294,7 +294,7 @@ struct key *key_alloc(struct key_type *type, const char *desc,
 #endif
 
         /* let the security module know about the key */
-        ret = security_key_alloc(key, ctx, flags);
+        ret = security_key_alloc(key, cred, flags);
         if (ret < 0)
                 goto security_error;
 
@@ -391,7 +391,7 @@ static int __key_instantiate_and_link(struct key *key,
                                       const void *data,
                                       size_t datalen,
                                       struct key *keyring,
-                                      struct key *instkey)
+                                      struct key *authkey)
 {
         int ret, awaken;
 
@@ -421,8 +421,8 @@ static int __key_instantiate_and_link(struct key *key,
                                 ret = __key_link(keyring, key);
 
                         /* disable the authorisation key */
-                        if (instkey)
-                                key_revoke(instkey);
+                        if (authkey)
+                                key_revoke(authkey);
                 }
         }
 
@@ -444,14 +444,14 @@ int key_instantiate_and_link(struct key *key,
                              const void *data,
                              size_t datalen,
                              struct key *keyring,
-                             struct key *instkey)
+                             struct key *authkey)
 {
         int ret;
 
         if (keyring)
                 down_write(&keyring->sem);
 
-        ret = __key_instantiate_and_link(key, data, datalen, keyring, instkey);
+        ret = __key_instantiate_and_link(key, data, datalen, keyring, authkey);
 
         if (keyring)
                 up_write(&keyring->sem);
@@ -469,7 +469,7 @@ EXPORT_SYMBOL(key_instantiate_and_link);
 int key_negate_and_link(struct key *key,
                         unsigned timeout,
                         struct key *keyring,
-                        struct key *instkey)
+                        struct key *authkey)
 {
         struct timespec now;
         int ret, awaken;
@@ -504,8 +504,8 @@ int key_negate_and_link(struct key *key,
                         ret = __key_link(keyring, key);
 
                 /* disable the authorisation key */
-                if (instkey)
-                        key_revoke(instkey);
+                if (authkey)
+                        key_revoke(authkey);
         }
 
         mutex_unlock(&key_construction_mutex);
@@ -743,6 +743,7 @@ key_ref_t key_create_or_update(key_ref_t keyring_ref,
                                key_perm_t perm,
                                unsigned long flags)
 {
+        const struct cred *cred = current_cred();
         struct key_type *ktype;
         struct key *keyring, *key = NULL;
         key_ref_t key_ref;
@@ -802,8 +803,8 @@ key_ref_t key_create_or_update(key_ref_t keyring_ref,
         }
 
         /* allocate a new key */
-        key = key_alloc(ktype, description, current->fsuid, current->fsgid,
-                        current, perm, flags);
+        key = key_alloc(ktype, description, cred->fsuid, cred->fsgid, cred,
+                        perm, flags);
         if (IS_ERR(key)) {
                 key_ref = ERR_CAST(key);
                 goto error_3;
diff --git a/security/keys/keyctl.c b/security/keys/keyctl.c
index acc9c89e40a8..7c72baa02f2e 100644
--- a/security/keys/keyctl.c
+++ b/security/keys/keyctl.c
@@ -103,7 +103,7 @@ asmlinkage long sys_add_key(const char __user *_type,
         }
 
         /* find the target keyring (which must be writable) */
-        keyring_ref = lookup_user_key(NULL, ringid, 1, 0, KEY_WRITE);
+        keyring_ref = lookup_user_key(ringid, 1, 0, KEY_WRITE);
         if (IS_ERR(keyring_ref)) {
                 ret = PTR_ERR(keyring_ref);
                 goto error3;
@@ -185,7 +185,7 @@ asmlinkage long sys_request_key(const char __user *_type,
         /* get the destination keyring if specified */
         dest_ref = NULL;
         if (destringid) {
-                dest_ref = lookup_user_key(NULL, destringid, 1, 0, KEY_WRITE);
+                dest_ref = lookup_user_key(destringid, 1, 0, KEY_WRITE);
                 if (IS_ERR(dest_ref)) {
                         ret = PTR_ERR(dest_ref);
                         goto error3;
@@ -235,7 +235,7 @@ long keyctl_get_keyring_ID(key_serial_t id, int create)
         key_ref_t key_ref;
         long ret;
 
-        key_ref = lookup_user_key(NULL, id, create, 0, KEY_SEARCH);
+        key_ref = lookup_user_key(id, create, 0, KEY_SEARCH);
         if (IS_ERR(key_ref)) {
                 ret = PTR_ERR(key_ref);
                 goto error;
@@ -308,7 +308,7 @@ long keyctl_update_key(key_serial_t id,
         }
 
         /* find the target key (which must be writable) */
-        key_ref = lookup_user_key(NULL, id, 0, 0, KEY_WRITE);
+        key_ref = lookup_user_key(id, 0, 0, KEY_WRITE);
         if (IS_ERR(key_ref)) {
                 ret = PTR_ERR(key_ref);
                 goto error2;
@@ -336,7 +336,7 @@ long keyctl_revoke_key(key_serial_t id)
         key_ref_t key_ref;
         long ret;
 
-        key_ref = lookup_user_key(NULL, id, 0, 0, KEY_WRITE);
+        key_ref = lookup_user_key(id, 0, 0, KEY_WRITE);
         if (IS_ERR(key_ref)) {
                 ret = PTR_ERR(key_ref);
                 goto error;
@@ -362,7 +362,7 @@ long keyctl_keyring_clear(key_serial_t ringid)
         key_ref_t keyring_ref;
         long ret;
 
-        keyring_ref = lookup_user_key(NULL, ringid, 1, 0, KEY_WRITE);
+        keyring_ref = lookup_user_key(ringid, 1, 0, KEY_WRITE);
         if (IS_ERR(keyring_ref)) {
                 ret = PTR_ERR(keyring_ref);
                 goto error;
@@ -388,13 +388,13 @@ long keyctl_keyring_link(key_serial_t id, key_serial_t ringid)
         key_ref_t keyring_ref, key_ref;
         long ret;
 
-        keyring_ref = lookup_user_key(NULL, ringid, 1, 0, KEY_WRITE);
+        keyring_ref = lookup_user_key(ringid, 1, 0, KEY_WRITE);
         if (IS_ERR(keyring_ref)) {
                 ret = PTR_ERR(keyring_ref);
                 goto error;
         }
 
-        key_ref = lookup_user_key(NULL, id, 1, 0, KEY_LINK);
+        key_ref = lookup_user_key(id, 1, 0, KEY_LINK);
         if (IS_ERR(key_ref)) {
                 ret = PTR_ERR(key_ref);
                 goto error2;
@@ -422,13 +422,13 @@ long keyctl_keyring_unlink(key_serial_t id, key_serial_t ringid)
         key_ref_t keyring_ref, key_ref;
         long ret;
 
-        keyring_ref = lookup_user_key(NULL, ringid, 0, 0, KEY_WRITE);
+        keyring_ref = lookup_user_key(ringid, 0, 0, KEY_WRITE);
         if (IS_ERR(keyring_ref)) {
                 ret = PTR_ERR(keyring_ref);
                 goto error;
         }
 
-        key_ref = lookup_user_key(NULL, id, 0, 0, 0);
+        key_ref = lookup_user_key(id, 0, 0, 0);
         if (IS_ERR(key_ref)) {
                 ret = PTR_ERR(key_ref);
                 goto error2;
@@ -464,7 +464,7 @@ long keyctl_describe_key(key_serial_t keyid,
         char *tmpbuf;
         long ret;
 
-        key_ref = lookup_user_key(NULL, keyid, 0, 1, KEY_VIEW);
+        key_ref = lookup_user_key(keyid, 0, 1, KEY_VIEW);
         if (IS_ERR(key_ref)) {
                 /* viewing a key under construction is permitted if we have the
                  * authorisation token handy */
@@ -472,7 +472,7 @@ long keyctl_describe_key(key_serial_t keyid,
                         instkey = key_get_instantiation_authkey(keyid);
                         if (!IS_ERR(instkey)) {
                                 key_put(instkey);
-                                key_ref = lookup_user_key(NULL, keyid,
+                                key_ref = lookup_user_key(keyid,
                                                           0, 1, 0);
                                 if (!IS_ERR(key_ref))
                                         goto okay;
@@ -557,7 +557,7 @@ long keyctl_keyring_search(key_serial_t ringid,
         }
 
         /* get the keyring at which to begin the search */
-        keyring_ref = lookup_user_key(NULL, ringid, 0, 0, KEY_SEARCH);
+        keyring_ref = lookup_user_key(ringid, 0, 0, KEY_SEARCH);
         if (IS_ERR(keyring_ref)) {
                 ret = PTR_ERR(keyring_ref);
                 goto error2;
@@ -566,7 +566,7 @@ long keyctl_keyring_search(key_serial_t ringid,
         /* get the destination keyring if specified */
         dest_ref = NULL;
         if (destringid) {
-                dest_ref = lookup_user_key(NULL, destringid, 1, 0, KEY_WRITE);
+                dest_ref = lookup_user_key(destringid, 1, 0, KEY_WRITE);
                 if (IS_ERR(dest_ref)) {
                         ret = PTR_ERR(dest_ref);
                         goto error3;
@@ -636,7 +636,7 @@ long keyctl_read_key(key_serial_t keyid, char __user *buffer, size_t buflen)
         long ret;
 
         /* find the key first */
-        key_ref = lookup_user_key(NULL, keyid, 0, 0, 0);
+        key_ref = lookup_user_key(keyid, 0, 0, 0);
         if (IS_ERR(key_ref)) {
                 ret = -ENOKEY;
                 goto error;
@@ -699,7 +699,7 @@ long keyctl_chown_key(key_serial_t id, uid_t uid, gid_t gid)
         if (uid == (uid_t) -1 && gid == (gid_t) -1)
                 goto error;
 
-        key_ref = lookup_user_key(NULL, id, 1, 1, KEY_SETATTR);
+        key_ref = lookup_user_key(id, 1, 1, KEY_SETATTR);
         if (IS_ERR(key_ref)) {
                 ret = PTR_ERR(key_ref);
                 goto error;
@@ -804,7 +804,7 @@ long keyctl_setperm_key(key_serial_t id, key_perm_t perm)
         if (perm & ~(KEY_POS_ALL | KEY_USR_ALL | KEY_GRP_ALL | KEY_OTH_ALL))
                 goto error;
 
-        key_ref = lookup_user_key(NULL, id, 1, 1, KEY_SETATTR);
+        key_ref = lookup_user_key(id, 1, 1, KEY_SETATTR);
         if (IS_ERR(key_ref)) {
                 ret = PTR_ERR(key_ref);
                 goto error;
@@ -817,7 +817,7 @@ long keyctl_setperm_key(key_serial_t id, key_perm_t perm)
         down_write(&key->sem);
 
         /* if we're not the sysadmin, we can only change a key that we own */
-        if (capable(CAP_SYS_ADMIN) || key->uid == current->fsuid) {
+        if (capable(CAP_SYS_ADMIN) || key->uid == current_fsuid()) {
                 key->perm = perm;
                 ret = 0;
         }
@@ -829,6 +829,60 @@ error:
 
 } /* end keyctl_setperm_key() */
 
+/*
+ * get the destination keyring for instantiation
+ */
+static long get_instantiation_keyring(key_serial_t ringid,
+                                      struct request_key_auth *rka,
+                                      struct key **_dest_keyring)
+{
+        key_ref_t dkref;
+
+        /* just return a NULL pointer if we weren't asked to make a link */
+        if (ringid == 0) {
+                *_dest_keyring = NULL;
+                return 0;
+        }
+
+        /* if a specific keyring is nominated by ID, then use that */
+        if (ringid > 0) {
+                dkref = lookup_user_key(ringid, 1, 0, KEY_WRITE);
+                if (IS_ERR(dkref))
+                        return PTR_ERR(dkref);
+                *_dest_keyring = key_ref_to_ptr(dkref);
+                return 0;
+        }
+
+        if (ringid == KEY_SPEC_REQKEY_AUTH_KEY)
+                return -EINVAL;
+
+        /* otherwise specify the destination keyring recorded in the
+         * authorisation key (any KEY_SPEC_*_KEYRING) */
+        if (ringid >= KEY_SPEC_REQUESTOR_KEYRING) {
+                *_dest_keyring = rka->dest_keyring;
+                return 0;
+        }
+
+        return -ENOKEY;
+}
+
+/*
+ * change the request_key authorisation key on the current process
+ */
+static int keyctl_change_reqkey_auth(struct key *key)
+{
+        struct cred *new;
+
+        new = prepare_creds();
+        if (!new)
+                return -ENOMEM;
+
+        key_put(new->request_key_auth);
+        new->request_key_auth = key_get(key);
+
+        return commit_creds(new);
+}
+
 /*****************************************************************************/
 /*
  * instantiate the key with the specified payload, and, if one is given, link
@@ -839,13 +893,15 @@ long keyctl_instantiate_key(key_serial_t id,
                             size_t plen,
                             key_serial_t ringid)
 {
+        const struct cred *cred = current_cred();
         struct request_key_auth *rka;
-        struct key *instkey;
-        key_ref_t keyring_ref;
+        struct key *instkey, *dest_keyring;
         void *payload;
         long ret;
         bool vm = false;
 
+        kenter("%d,,%zu,%d", id, plen, ringid);
+
         ret = -EINVAL;
         if (plen > 1024 * 1024 - 1)
                 goto error;
@@ -853,7 +909,7 @@ long keyctl_instantiate_key(key_serial_t id,
         /* the appropriate instantiation authorisation key must have been
          * assumed before calling this */
         ret = -EPERM;
-        instkey = current->request_key_auth;
+        instkey = cred->request_key_auth;
         if (!instkey)
                 goto error;
 
@@ -883,28 +939,20 @@ long keyctl_instantiate_key(key_serial_t id,
 
         /* find the destination keyring amongst those belonging to the
          * requesting task */
-        keyring_ref = NULL;
-        if (ringid) {
-                keyring_ref = lookup_user_key(rka->context, ringid, 1, 0,
-                                              KEY_WRITE);
-                if (IS_ERR(keyring_ref)) {
-                        ret = PTR_ERR(keyring_ref);
-                        goto error2;
-                }
-        }
+        ret = get_instantiation_keyring(ringid, rka, &dest_keyring);
+        if (ret < 0)
+                goto error2;
 
         /* instantiate the key and link it into a keyring */
         ret = key_instantiate_and_link(rka->target_key, payload, plen,
-                                       key_ref_to_ptr(keyring_ref), instkey);
+                                       dest_keyring, instkey);
 
-        key_ref_put(keyring_ref);
+        key_put(dest_keyring);
 
         /* discard the assumed authority if it's just been disabled by
          * instantiation of the key */
-        if (ret == 0) {
-                key_put(current->request_key_auth);
-                current->request_key_auth = NULL;
-        }
+        if (ret == 0)
+                keyctl_change_reqkey_auth(NULL);
 
 error2:
         if (!vm)
@@ -923,15 +971,17 @@ error:
  */
 long keyctl_negate_key(key_serial_t id, unsigned timeout, key_serial_t ringid)
 {
+        const struct cred *cred = current_cred();
         struct request_key_auth *rka;
-        struct key *instkey;
-        key_ref_t keyring_ref;
+        struct key *instkey, *dest_keyring;
         long ret;
 
+        kenter("%d,%u,%d", id, timeout, ringid);
+
         /* the appropriate instantiation authorisation key must have been
          * assumed before calling this */
         ret = -EPERM;
-        instkey = current->request_key_auth;
+        instkey = cred->request_key_auth;
         if (!instkey)
                 goto error;
 
@@ -941,27 +991,20 @@ long keyctl_negate_key(key_serial_t id, unsigned timeout, key_serial_t ringid)
 
         /* find the destination keyring if present (which must also be
          * writable) */
-        keyring_ref = NULL;
-        if (ringid) {
-                keyring_ref = lookup_user_key(NULL, ringid, 1, 0, KEY_WRITE);
-                if (IS_ERR(keyring_ref)) {
-                        ret = PTR_ERR(keyring_ref);
-                        goto error;
-                }
-        }
+        ret = get_instantiation_keyring(ringid, rka, &dest_keyring);
+        if (ret < 0)
+                goto error;
 
         /* instantiate the key and link it into a keyring */
         ret = key_negate_and_link(rka->target_key, timeout,
-                                  key_ref_to_ptr(keyring_ref), instkey);
+                                  dest_keyring, instkey);
 
-        key_ref_put(keyring_ref);
+        key_put(dest_keyring);
 
         /* discard the assumed authority if it's just been disabled by
          * instantiation of the key */
-        if (ret == 0) {
-                key_put(current->request_key_auth);
-                current->request_key_auth = NULL;
-        }
+        if (ret == 0)
+                keyctl_change_reqkey_auth(NULL);
 
 error:
         return ret;
@@ -975,35 +1018,56 @@ error:
  */
 long keyctl_set_reqkey_keyring(int reqkey_defl)
 {
-        int ret;
+        struct cred *new;
+        int ret, old_setting;
+
+        old_setting = current_cred_xxx(jit_keyring);
+
+        if (reqkey_defl == KEY_REQKEY_DEFL_NO_CHANGE)
+                return old_setting;
+
+        new = prepare_creds();
+        if (!new)
+                return -ENOMEM;
 
         switch (reqkey_defl) {
         case KEY_REQKEY_DEFL_THREAD_KEYRING:
-                ret = install_thread_keyring(current);
+                ret = install_thread_keyring_to_cred(new);
                 if (ret < 0)
-                        return ret;
+                        goto error;
                 goto set;
 
         case KEY_REQKEY_DEFL_PROCESS_KEYRING:
-                ret = install_process_keyring(current);
-                if (ret < 0)
-                        return ret;
+                ret = install_process_keyring_to_cred(new);
+                if (ret < 0) {
+                        if (ret != -EEXIST)
+                                goto error;
+                        ret = 0;
+                }
+                goto set;
 
         case KEY_REQKEY_DEFL_DEFAULT:
         case KEY_REQKEY_DEFL_SESSION_KEYRING:
         case KEY_REQKEY_DEFL_USER_KEYRING:
         case KEY_REQKEY_DEFL_USER_SESSION_KEYRING:
-        set:
-                current->jit_keyring = reqkey_defl;
+        case KEY_REQKEY_DEFL_REQUESTOR_KEYRING:
+                goto set;
 
         case KEY_REQKEY_DEFL_NO_CHANGE:
-                return current->jit_keyring;
-
         case KEY_REQKEY_DEFL_GROUP_KEYRING:
         default:
-                return -EINVAL;
+                ret = -EINVAL;
+                goto error;
         }
 
+set:
+        new->jit_keyring = reqkey_defl;
+        commit_creds(new);
+        return old_setting;
+error:
+        abort_creds(new);
+        return -EINVAL;
+
 } /* end keyctl_set_reqkey_keyring() */
 
 /*****************************************************************************/
@@ -1018,7 +1082,7 @@ long keyctl_set_timeout(key_serial_t id, unsigned timeout)
         time_t expiry;
         long ret;
 
-        key_ref = lookup_user_key(NULL, id, 1, 1, KEY_SETATTR);
+        key_ref = lookup_user_key(id, 1, 1, KEY_SETATTR);
         if (IS_ERR(key_ref)) {
                 ret = PTR_ERR(key_ref);
                 goto error;
@@ -1062,9 +1126,7 @@ long keyctl_assume_authority(key_serial_t id)
 
         /* we divest ourselves of authority if given an ID of 0 */
         if (id == 0) {
-                key_put(current->request_key_auth);
-                current->request_key_auth = NULL;
-                ret = 0;
+                ret = keyctl_change_reqkey_auth(NULL);
                 goto error;
         }
 
@@ -1079,10 +1141,12 @@ long keyctl_assume_authority(key_serial_t id)
                 goto error;
         }
 
-        key_put(current->request_key_auth);
-        current->request_key_auth = authkey;
-        ret = authkey->serial;
+        ret = keyctl_change_reqkey_auth(authkey);
+        if (ret < 0)
+                goto error;
+        key_put(authkey);
 
+        ret = authkey->serial;
 error:
         return ret;
 
@@ -1105,7 +1169,7 @@ long keyctl_get_security(key_serial_t keyid,
         char *context;
         long ret;
 
-        key_ref = lookup_user_key(NULL, keyid, 0, 1, KEY_VIEW);
+        key_ref = lookup_user_key(keyid, 0, 1, KEY_VIEW);
         if (IS_ERR(key_ref)) {
                 if (PTR_ERR(key_ref) != -EACCES)
                         return PTR_ERR(key_ref);
@@ -1117,7 +1181,7 @@ long keyctl_get_security(key_serial_t keyid,
                         return PTR_ERR(key_ref);
                 key_put(instkey);
 
-                key_ref = lookup_user_key(NULL, keyid, 0, 1, 0);
+                key_ref = lookup_user_key(keyid, 0, 1, 0);
                 if (IS_ERR(key_ref))
                         return PTR_ERR(key_ref);
         }
diff --git a/security/keys/keyring.c b/security/keys/keyring.c
index a9ab8affc092..ed851574d073 100644
--- a/security/keys/keyring.c
+++ b/security/keys/keyring.c
@@ -16,6 +16,7 @@
 #include <linux/security.h>
 #include <linux/seq_file.h>
 #include <linux/err.h>
+#include <keys/keyring-type.h>
 #include <asm/uaccess.h>
 #include "internal.h"
 
@@ -244,14 +245,14 @@ static long keyring_read(const struct key *keyring,
  * allocate a keyring and link into the destination keyring
  */
 struct key *keyring_alloc(const char *description, uid_t uid, gid_t gid,
-                          struct task_struct *ctx, unsigned long flags,
+                          const struct cred *cred, unsigned long flags,
                           struct key *dest)
 {
         struct key *keyring;
         int ret;
 
         keyring = key_alloc(&key_type_keyring, description,
-                            uid, gid, ctx,
+                            uid, gid, cred,
                             (KEY_POS_ALL & ~KEY_POS_SETATTR) | KEY_USR_ALL,
                             flags);
 
@@ -280,7 +281,7 @@ struct key *keyring_alloc(const char *description, uid_t uid, gid_t gid,
  * - we propagate the possession attribute from the keyring ref to the key ref
  */
 key_ref_t keyring_search_aux(key_ref_t keyring_ref,
-                             struct task_struct *context,
+                             const struct cred *cred,
                              struct key_type *type,
                              const void *description,
                              key_match_func_t match)
@@ -303,7 +304,7 @@ key_ref_t keyring_search_aux(key_ref_t keyring_ref,
         key_check(keyring);
 
         /* top keyring must have search permission to begin the search */
-        err = key_task_permission(keyring_ref, context, KEY_SEARCH);
+        err = key_task_permission(keyring_ref, cred, KEY_SEARCH);
         if (err < 0) {
                 key_ref = ERR_PTR(err);
                 goto error;
@@ -376,7 +377,7 @@ descend:
 
                 /* key must have search permissions */
                 if (key_task_permission(make_key_ref(key, possessed),
-                                        context, KEY_SEARCH) < 0)
+                                        cred, KEY_SEARCH) < 0)
                         continue;
 
                 /* we set a different error code if we pass a negative key */
@@ -403,7 +404,7 @@ ascend:
                         continue;
 
                 if (key_task_permission(make_key_ref(key, possessed),
-                                        context, KEY_SEARCH) < 0)
+                                        cred, KEY_SEARCH) < 0)
                         continue;
 
                 /* stack the current position */
@@ -458,7 +459,7 @@ key_ref_t keyring_search(key_ref_t keyring,
         if (!type->match)
                 return ERR_PTR(-ENOKEY);
 
-        return keyring_search_aux(keyring, current,
+        return keyring_search_aux(keyring, current->cred,
                                   type, description, type->match);
 
 } /* end keyring_search() */
diff --git a/security/keys/permission.c b/security/keys/permission.c
index 3b41f9b52537..5d9fc7b93f2e 100644
--- a/security/keys/permission.c
+++ b/security/keys/permission.c
@@ -14,12 +14,19 @@
 #include "internal.h"
 
 /*****************************************************************************/
-/*
- * check to see whether permission is granted to use a key in the desired way,
- * but permit the security modules to override
+/**
+ * key_task_permission - Check a key can be used
+ * @key_ref: The key to check
+ * @cred: The credentials to use
+ * @perm: The permissions to check for
+ *
+ * Check to see whether permission is granted to use a key in the desired way,
+ * but permit the security modules to override.
+ *
+ * The caller must hold either a ref on cred or must hold the RCU readlock or a
+ * spinlock.
  */
-int key_task_permission(const key_ref_t key_ref,
-                        struct task_struct *context,
+int key_task_permission(const key_ref_t key_ref, const struct cred *cred,
                         key_perm_t perm)
 {
         struct key *key;
@@ -29,7 +36,7 @@ int key_task_permission(const key_ref_t key_ref,
         key = key_ref_to_ptr(key_ref);
 
         /* use the second 8-bits of permissions for keys the caller owns */
-        if (key->uid == context->fsuid) {
+        if (key->uid == cred->fsuid) {
                 kperm = key->perm >> 16;
                 goto use_these_perms;
         }
@@ -37,15 +44,12 @@ int key_task_permission(const key_ref_t key_ref,
         /* use the third 8-bits of permissions for keys the caller has a group
          * membership in common with */
         if (key->gid != -1 && key->perm & KEY_GRP_ALL) {
-                if (key->gid == context->fsgid) {
+                if (key->gid == cred->fsgid) {
                         kperm = key->perm >> 8;
                         goto use_these_perms;
                 }
 
-                task_lock(context);
-                ret = groups_search(context->group_info, key->gid);
-                task_unlock(context);
-
+                ret = groups_search(cred->group_info, key->gid);
                 if (ret) {
                         kperm = key->perm >> 8;
                         goto use_these_perms;
@@ -56,6 +60,7 @@ int key_task_permission(const key_ref_t key_ref,
         kperm = key->perm;
 
 use_these_perms:
+
         /* use the top 8-bits of permissions for keys the caller possesses
          * - possessor permissions are additive with other permissions
          */
@@ -68,7 +73,7 @@ use_these_perms:
                 return -EACCES;
 
         /* let LSM be the final arbiter */
-        return security_key_permission(key_ref, context, perm);
+        return security_key_permission(key_ref, cred, perm);
 
 } /* end key_task_permission() */
 
diff --git a/security/keys/proc.c b/security/keys/proc.c
index f619170da760..7f508def50e3 100644
--- a/security/keys/proc.c
+++ b/security/keys/proc.c
@@ -136,8 +136,12 @@ static int proc_keys_show(struct seq_file *m, void *v)
         int rc;
 
         /* check whether the current task is allowed to view the key (assuming
-         * non-possession) */
-        rc = key_task_permission(make_key_ref(key, 0), current, KEY_VIEW);
+         * non-possession)
+         * - the caller holds a spinlock, and thus the RCU read lock, making our
+         *   access to __current_cred() safe
+         */
+        rc = key_task_permission(make_key_ref(key, 0), current_cred(),
+                                 KEY_VIEW);
         if (rc < 0)
                 return 0;
 
diff --git a/security/keys/process_keys.c b/security/keys/process_keys.c
index 45b240af6dbe..2f5d89e92b85 100644
--- a/security/keys/process_keys.c
+++ b/security/keys/process_keys.c
@@ -40,13 +40,17 @@ struct key_user root_key_user = {
 /*
  * install user and user session keyrings for a particular UID
  */
-int install_user_keyrings(struct task_struct *tsk)
+int install_user_keyrings(void)
 {
-        struct user_struct *user = tsk->user;
+        struct user_struct *user;
+        const struct cred *cred;
         struct key *uid_keyring, *session_keyring;
         char buf[20];
         int ret;
 
+        cred = current_cred();
+        user = cred->user;
+
         kenter("%p{%u}", user, user->uid);
 
         if (user->uid_keyring) {
@@ -67,7 +71,7 @@ int install_user_keyrings(struct task_struct *tsk)
                 uid_keyring = find_keyring_by_name(buf, true);
                 if (IS_ERR(uid_keyring)) {
                         uid_keyring = keyring_alloc(buf, user->uid, (gid_t) -1,
-                                                    tsk, KEY_ALLOC_IN_QUOTA,
+                                                    cred, KEY_ALLOC_IN_QUOTA,
                                                     NULL);
                         if (IS_ERR(uid_keyring)) {
                                 ret = PTR_ERR(uid_keyring);
@@ -83,7 +87,7 @@ int install_user_keyrings(struct task_struct *tsk)
                 if (IS_ERR(session_keyring)) {
                         session_keyring =
                                 keyring_alloc(buf, user->uid, (gid_t) -1,
-                                              tsk, KEY_ALLOC_IN_QUOTA, NULL);
+                                              cred, KEY_ALLOC_IN_QUOTA, NULL);
                         if (IS_ERR(session_keyring)) {
                                 ret = PTR_ERR(session_keyring);
                                 goto error_release;
@@ -115,140 +119,128 @@ error:
         return ret;
 }
 
-/*****************************************************************************/
 /*
- * deal with the UID changing
+ * install a fresh thread keyring directly to new credentials
  */
-void switch_uid_keyring(struct user_struct *new_user)
+int install_thread_keyring_to_cred(struct cred *new)
 {
-#if 0 /* do nothing for now */
-        struct key *old;
-
-        /* switch to the new user's session keyring if we were running under
-         * root's default session keyring */
-        if (new_user->uid != 0 &&
-            current->session_keyring == &root_session_keyring
-            ) {
-                atomic_inc(&new_user->session_keyring->usage);
-
-                task_lock(current);
-                old = current->session_keyring;
-                current->session_keyring = new_user->session_keyring;
-                task_unlock(current);
+        struct key *keyring;
 
-                key_put(old);
-        }
-#endif
+        keyring = keyring_alloc("_tid", new->uid, new->gid, new,
+                                KEY_ALLOC_QUOTA_OVERRUN, NULL);
+        if (IS_ERR(keyring))
+                return PTR_ERR(keyring);
 
-} /* end switch_uid_keyring() */
+        new->thread_keyring = keyring;
+        return 0;
+}
 
-/*****************************************************************************/
 /*
  * install a fresh thread keyring, discarding the old one
  */
-int install_thread_keyring(struct task_struct *tsk)
+static int install_thread_keyring(void)
 {
-        struct key *keyring, *old;
-        char buf[20];
+        struct cred *new;
         int ret;
 
-        sprintf(buf, "_tid.%u", tsk->pid);
+        new = prepare_creds();
+        if (!new)
+                return -ENOMEM;
 
-        keyring = keyring_alloc(buf, tsk->uid, tsk->gid, tsk,
-                                KEY_ALLOC_QUOTA_OVERRUN, NULL);
-        if (IS_ERR(keyring)) {
-                ret = PTR_ERR(keyring);
-                goto error;
+        BUG_ON(new->thread_keyring);
+
+        ret = install_thread_keyring_to_cred(new);
+        if (ret < 0) {
+                abort_creds(new);
+                return ret;
         }
 
-        task_lock(tsk);
-        old = tsk->thread_keyring;
-        tsk->thread_keyring = keyring;
-        task_unlock(tsk);
+        return commit_creds(new);
+}
 
-        ret = 0;
+/*
+ * install a process keyring directly to a credentials struct
+ * - returns -EEXIST if there was already a process keyring, 0 if one installed,
+ *   and other -ve on any other error
+ */
+int install_process_keyring_to_cred(struct cred *new)
+{
+        struct key *keyring;
+        int ret;
 
-        key_put(old);
-error:
+        if (new->tgcred->process_keyring)
+                return -EEXIST;
+
+        keyring = keyring_alloc("_pid", new->uid, new->gid,
+                                new, KEY_ALLOC_QUOTA_OVERRUN, NULL);
+        if (IS_ERR(keyring))
+                return PTR_ERR(keyring);
+
+        spin_lock_irq(&new->tgcred->lock);
+        if (!new->tgcred->process_keyring) {
+                new->tgcred->process_keyring = keyring;
+                keyring = NULL;
+                ret = 0;
+        } else {
+                ret = -EEXIST;
+        }
+        spin_unlock_irq(&new->tgcred->lock);
+        key_put(keyring);
         return ret;
+}
 
-} /* end install_thread_keyring() */
-
-/*****************************************************************************/
 /*
  * make sure a process keyring is installed
+ * - we
  */
-int install_process_keyring(struct task_struct *tsk)
+static int install_process_keyring(void)
 {
-        struct key *keyring;
-        char buf[20];
+        struct cred *new;
         int ret;
 
-        might_sleep();
-
-        if (!tsk->signal->process_keyring) {
-                sprintf(buf, "_pid.%u", tsk->tgid);
-
-                keyring = keyring_alloc(buf, tsk->uid, tsk->gid, tsk,
-                                        KEY_ALLOC_QUOTA_OVERRUN, NULL);
-                if (IS_ERR(keyring)) {
-                        ret = PTR_ERR(keyring);
-                        goto error;
-                }
-
-                /* attach keyring */
-                spin_lock_irq(&tsk->sighand->siglock);
-                if (!tsk->signal->process_keyring) {
-                        tsk->signal->process_keyring = keyring;
-                        keyring = NULL;
-                }
-                spin_unlock_irq(&tsk->sighand->siglock);
+        new = prepare_creds();
+        if (!new)
+                return -ENOMEM;
 
-                key_put(keyring);
+        ret = install_process_keyring_to_cred(new);
+        if (ret < 0) {
+                abort_creds(new);
+                return ret != -EEXIST ?: 0;
         }
 
-        ret = 0;
-error:
-        return ret;
-
-} /* end install_process_keyring() */
+        return commit_creds(new);
+}
 
-/*****************************************************************************/
 /*
- * install a session keyring, discarding the old one
- * - if a keyring is not supplied, an empty one is invented
+ * install a session keyring directly to a credentials struct
  */
-static int install_session_keyring(struct task_struct *tsk,
-                                   struct key *keyring)
+static int install_session_keyring_to_cred(struct cred *cred,
+                                           struct key *keyring)
 {
         unsigned long flags;
         struct key *old;
-        char buf[20];
 
         might_sleep();
 
         /* create an empty session keyring */
         if (!keyring) {
-                sprintf(buf, "_ses.%u", tsk->tgid);
-
                 flags = KEY_ALLOC_QUOTA_OVERRUN;
-                if (tsk->signal->session_keyring)
+                if (cred->tgcred->session_keyring)
                         flags = KEY_ALLOC_IN_QUOTA;
 
-                keyring = keyring_alloc(buf, tsk->uid, tsk->gid, tsk,
-                                        flags, NULL);
+                keyring = keyring_alloc("_ses", cred->uid, cred->gid,
+                                        cred, flags, NULL);
                 if (IS_ERR(keyring))
                         return PTR_ERR(keyring);
-        }
-        else {
+        } else {
                 atomic_inc(&keyring->usage);
         }
 
         /* install the keyring */
-        spin_lock_irq(&tsk->sighand->siglock);
-        old = tsk->signal->session_keyring;
-        rcu_assign_pointer(tsk->signal->session_keyring, keyring);
-        spin_unlock_irq(&tsk->sighand->siglock);
+        spin_lock_irq(&cred->tgcred->lock);
+        old = cred->tgcred->session_keyring;
+        rcu_assign_pointer(cred->tgcred->session_keyring, keyring);
+        spin_unlock_irq(&cred->tgcred->lock);
 
         /* we're using RCU on the pointer, but there's no point synchronising
          * on it if it didn't previously point to anything */
@@ -258,110 +250,29 @@ static int install_session_keyring(struct task_struct *tsk,
         }
 
         return 0;
+}
 
-} /* end install_session_keyring() */
-
-/*****************************************************************************/
-/*
- * copy the keys in a thread group for fork without CLONE_THREAD
- */
-int copy_thread_group_keys(struct task_struct *tsk)
-{
-        key_check(current->thread_group->session_keyring);
-        key_check(current->thread_group->process_keyring);
-
-        /* no process keyring yet */
-        tsk->signal->process_keyring = NULL;
-
-        /* same session keyring */
-        rcu_read_lock();
-        tsk->signal->session_keyring =
-                key_get(rcu_dereference(current->signal->session_keyring));
-        rcu_read_unlock();
-
-        return 0;
-
-} /* end copy_thread_group_keys() */
-
-/*****************************************************************************/
-/*
- * copy the keys for fork
- */
-int copy_keys(unsigned long clone_flags, struct task_struct *tsk)
-{
-        key_check(tsk->thread_keyring);
-        key_check(tsk->request_key_auth);
-
-        /* no thread keyring yet */
-        tsk->thread_keyring = NULL;
-
-        /* copy the request_key() authorisation for this thread */
-        key_get(tsk->request_key_auth);
-
-        return 0;
-
-} /* end copy_keys() */
-
-/*****************************************************************************/
-/*
- * dispose of thread group keys upon thread group destruction
- */
-void exit_thread_group_keys(struct signal_struct *tg)
-{
-        key_put(tg->session_keyring);
-        key_put(tg->process_keyring);
-
-} /* end exit_thread_group_keys() */
-
-/*****************************************************************************/
-/*
- * dispose of per-thread keys upon thread exit
- */
-void exit_keys(struct task_struct *tsk)
-{
-        key_put(tsk->thread_keyring);
-        key_put(tsk->request_key_auth);
-
-} /* end exit_keys() */
-
-/*****************************************************************************/
 /*
- * deal with execve()
+ * install a session keyring, discarding the old one
+ * - if a keyring is not supplied, an empty one is invented
  */
-int exec_keys(struct task_struct *tsk)
+static int install_session_keyring(struct key *keyring)
 {
-        struct key *old;
-
-        /* newly exec'd tasks don't get a thread keyring */
-        task_lock(tsk);
-        old = tsk->thread_keyring;
-        tsk->thread_keyring = NULL;
-        task_unlock(tsk);
-
-        key_put(old);
-
-        /* discard the process keyring from a newly exec'd task */
-        spin_lock_irq(&tsk->sighand->siglock);
-        old = tsk->signal->process_keyring;
-        tsk->signal->process_keyring = NULL;
-        spin_unlock_irq(&tsk->sighand->siglock);
-
-        key_put(old);
-
-        return 0;
+        struct cred *new;
+        int ret;
 
-} /* end exec_keys() */
+        new = prepare_creds();
+        if (!new)
+                return -ENOMEM;
 
-/*****************************************************************************/
-/*
- * deal with SUID programs
- * - we might want to make this invent a new session keyring
- */
-int suid_keys(struct task_struct *tsk)
-{
-        return 0;
+        ret = install_session_keyring_to_cred(new, NULL);
+        if (ret < 0) {
+                abort_creds(new);
+                return ret;
+        }
 
-} /* end suid_keys() */
+        return commit_creds(new);
+}
 
 /*****************************************************************************/
 /*
@@ -370,10 +281,11 @@ int suid_keys(struct task_struct *tsk)
 void key_fsuid_changed(struct task_struct *tsk)
 {
         /* update the ownership of the thread keyring */
-        if (tsk->thread_keyring) {
-                down_write(&tsk->thread_keyring->sem);
-                tsk->thread_keyring->uid = tsk->fsuid;
-                up_write(&tsk->thread_keyring->sem);
+        BUG_ON(!tsk->cred);
+        if (tsk->cred->thread_keyring) {
+                down_write(&tsk->cred->thread_keyring->sem);
+                tsk->cred->thread_keyring->uid = tsk->cred->fsuid;
+                up_write(&tsk->cred->thread_keyring->sem);
         }
 
 } /* end key_fsuid_changed() */
@@ -385,10 +297,11 @@ void key_fsuid_changed(struct task_struct *tsk)
 void key_fsgid_changed(struct task_struct *tsk)
 {
         /* update the ownership of the thread keyring */
-        if (tsk->thread_keyring) {
-                down_write(&tsk->thread_keyring->sem);
-                tsk->thread_keyring->gid = tsk->fsgid;
-                up_write(&tsk->thread_keyring->sem);
+        BUG_ON(!tsk->cred);
+        if (tsk->cred->thread_keyring) {
+                down_write(&tsk->cred->thread_keyring->sem);
+                tsk->cred->thread_keyring->gid = tsk->cred->fsgid;
+                up_write(&tsk->cred->thread_keyring->sem);
         }
 
 } /* end key_fsgid_changed() */
@@ -404,7 +317,7 @@ void key_fsgid_changed(struct task_struct *tsk)
 key_ref_t search_process_keyrings(struct key_type *type,
                                   const void *description,
                                   key_match_func_t match,
-                                  struct task_struct *context)
+                                  const struct cred *cred)
 {
         struct request_key_auth *rka;
         key_ref_t key_ref, ret, err;
@@ -423,10 +336,10 @@ key_ref_t search_process_keyrings(struct key_type *type,
         err = ERR_PTR(-EAGAIN);
 
         /* search the thread keyring first */
-        if (context->thread_keyring) {
+        if (cred->thread_keyring) {
                 key_ref = keyring_search_aux(
-                        make_key_ref(context->thread_keyring, 1),
-                        context, type, description, match);
+                        make_key_ref(cred->thread_keyring, 1),
+                        cred, type, description, match);
                 if (!IS_ERR(key_ref))
                         goto found;
 
@@ -444,10 +357,10 @@ key_ref_t search_process_keyrings(struct key_type *type,
         }
 
         /* search the process keyring second */
-        if (context->signal->process_keyring) {
+        if (cred->tgcred->process_keyring) {
                 key_ref = keyring_search_aux(
-                        make_key_ref(context->signal->process_keyring, 1),
-                        context, type, description, match);
+                        make_key_ref(cred->tgcred->process_keyring, 1),
+                        cred, type, description, match);
                 if (!IS_ERR(key_ref))
                         goto found;
 
@@ -465,13 +378,13 @@ key_ref_t search_process_keyrings(struct key_type *type,
         }
 
         /* search the session keyring */
-        if (context->signal->session_keyring) {
+        if (cred->tgcred->session_keyring) {
                 rcu_read_lock();
                 key_ref = keyring_search_aux(
                         make_key_ref(rcu_dereference(
-                                             context->signal->session_keyring),
+                                             cred->tgcred->session_keyring),
                                      1),
-                        context, type, description, match);
+                        cred, type, description, match);
                 rcu_read_unlock();
 
                 if (!IS_ERR(key_ref))
@@ -490,10 +403,10 @@ key_ref_t search_process_keyrings(struct key_type *type,
                 }
         }
         /* or search the user-session keyring */
-        else if (context->user->session_keyring) {
+        else if (cred->user->session_keyring) {
                 key_ref = keyring_search_aux(
-                        make_key_ref(context->user->session_keyring, 1),
-                        context, type, description, match);
+                        make_key_ref(cred->user->session_keyring, 1),
+                        cred, type, description, match);
                 if (!IS_ERR(key_ref))
                         goto found;
 
@@ -514,20 +427,20 @@ key_ref_t search_process_keyrings(struct key_type *type,
          * search the keyrings of the process mentioned there
          * - we don't permit access to request_key auth keys via this method
          */
-        if (context->request_key_auth &&
-            context == current &&
+        if (cred->request_key_auth &&
+            cred == current_cred() &&
             type != &key_type_request_key_auth
             ) {
                 /* defend against the auth key being revoked */
-                down_read(&context->request_key_auth->sem);
+                down_read(&cred->request_key_auth->sem);
 
-                if (key_validate(context->request_key_auth) == 0) {
-                        rka = context->request_key_auth->payload.data;
+                if (key_validate(cred->request_key_auth) == 0) {
+                        rka = cred->request_key_auth->payload.data;
 
                         key_ref = search_process_keyrings(type, description,
-                                                          match, rka->context);
+                                                          match, rka->cred);
 
-                        up_read(&context->request_key_auth->sem);
+                        up_read(&cred->request_key_auth->sem);
 
                         if (!IS_ERR(key_ref))
                                 goto found;
@@ -544,7 +457,7 @@ key_ref_t search_process_keyrings(struct key_type *type,
                                 break;
                         }
                 } else {
-                        up_read(&context->request_key_auth->sem);
+                        up_read(&cred->request_key_auth->sem);
                 }
         }
 
@@ -572,93 +485,98 @@ static int lookup_user_key_possessed(const struct key *key, const void *target)
  * - don't create special keyrings unless so requested
  * - partially constructed keys aren't found unless requested
  */
-key_ref_t lookup_user_key(struct task_struct *context, key_serial_t id,
-                          int create, int partial, key_perm_t perm)
+key_ref_t lookup_user_key(key_serial_t id, int create, int partial,
+                          key_perm_t perm)
 {
-        key_ref_t key_ref, skey_ref;
+        struct request_key_auth *rka;
+        const struct cred *cred;
         struct key *key;
+        key_ref_t key_ref, skey_ref;
         int ret;
 
-        if (!context)
-                context = current;
-
+try_again:
+        cred = get_current_cred();
         key_ref = ERR_PTR(-ENOKEY);
 
         switch (id) {
         case KEY_SPEC_THREAD_KEYRING:
-                if (!context->thread_keyring) {
+                if (!cred->thread_keyring) {
                         if (!create)
                                 goto error;
 
-                        ret = install_thread_keyring(context);
+                        ret = install_thread_keyring();
                         if (ret < 0) {
                                 key = ERR_PTR(ret);
                                 goto error;
                         }
+                        goto reget_creds;
                 }
 
-                key = context->thread_keyring;
+                key = cred->thread_keyring;
                 atomic_inc(&key->usage);
                 key_ref = make_key_ref(key, 1);
                 break;
 
         case KEY_SPEC_PROCESS_KEYRING:
-                if (!context->signal->process_keyring) {
+                if (!cred->tgcred->process_keyring) {
                         if (!create)
                                 goto error;
 
-                        ret = install_process_keyring(context);
+                        ret = install_process_keyring();
                         if (ret < 0) {
                                 key = ERR_PTR(ret);
                                 goto error;
                         }
+                        goto reget_creds;
                 }
 
-                key = context->signal->process_keyring;
+                key = cred->tgcred->process_keyring;
                 atomic_inc(&key->usage);
                 key_ref = make_key_ref(key, 1);
                 break;
 
         case KEY_SPEC_SESSION_KEYRING:
-                if (!context->signal->session_keyring) {
+                if (!cred->tgcred->session_keyring) {
                         /* always install a session keyring upon access if one
                          * doesn't exist yet */
-                        ret = install_user_keyrings(context);
+                        ret = install_user_keyrings();
                         if (ret < 0)
                                 goto error;
                         ret = install_session_keyring(
-                                context, context->user->session_keyring);
+                                cred->user->session_keyring);
+
                         if (ret < 0)
                                 goto error;
+                        goto reget_creds;
                 }
 
                 rcu_read_lock();
-                key = rcu_dereference(context->signal->session_keyring);
+                key = rcu_dereference(cred->tgcred->session_keyring);
                 atomic_inc(&key->usage);
                 rcu_read_unlock();
                 key_ref = make_key_ref(key, 1);
                 break;
 
         case KEY_SPEC_USER_KEYRING:
-                if (!context->user->uid_keyring) {
-                        ret = install_user_keyrings(context);
+                if (!cred->user->uid_keyring) {
+                        ret = install_user_keyrings();
                         if (ret < 0)
                                 goto error;
                 }
 
-                key = context->user->uid_keyring;
+                key = cred->user->uid_keyring;
                 atomic_inc(&key->usage);
                 key_ref = make_key_ref(key, 1);
                 break;
 
         case KEY_SPEC_USER_SESSION_KEYRING:
-                if (!context->user->session_keyring) {
-                        ret = install_user_keyrings(context);
+                if (!cred->user->session_keyring) {
+                        ret = install_user_keyrings();
                         if (ret < 0)
                                 goto error;
                 }
 
-                key = context->user->session_keyring;
+                key = cred->user->session_keyring;
                 atomic_inc(&key->usage);
                 key_ref = make_key_ref(key, 1);
                 break;
@@ -669,7 +587,7 @@ key_ref_t lookup_user_key(struct task_struct *context, key_serial_t id,
                 goto error;
 
         case KEY_SPEC_REQKEY_AUTH_KEY:
-                key = context->request_key_auth;
+                key = cred->request_key_auth;
                 if (!key)
                         goto error;
 
@@ -677,6 +595,25 @@ key_ref_t lookup_user_key(struct task_struct *context, key_serial_t id,
                 key_ref = make_key_ref(key, 1);
                 break;
 
+        case KEY_SPEC_REQUESTOR_KEYRING:
+                if (!cred->request_key_auth)
+                        goto error;
+
+                down_read(&cred->request_key_auth->sem);
+                if (cred->request_key_auth->flags & KEY_FLAG_REVOKED) {
+                        key_ref = ERR_PTR(-EKEYREVOKED);
+                        key = NULL;
+                } else {
+                        rka = cred->request_key_auth->payload.data;
+                        key = rka->dest_keyring;
+                        atomic_inc(&key->usage);
+                }
+                up_read(&cred->request_key_auth->sem);
+                if (!key)
+                        goto error;
+                key_ref = make_key_ref(key, 1);
+                break;
+
         default:
                 key_ref = ERR_PTR(-EINVAL);
                 if (id < 1)
@@ -693,7 +630,7 @@ key_ref_t lookup_user_key(struct task_struct *context, key_serial_t id,
                 /* check to see if we possess the key */
                 skey_ref = search_process_keyrings(key->type, key,
                                                    lookup_user_key_possessed,
-                                                   current);
+                                                   cred);
 
                 if (!IS_ERR(skey_ref)) {
                         key_put(key);
@@ -725,11 +662,12 @@ key_ref_t lookup_user_key(struct task_struct *context, key_serial_t id,
                 goto invalid_key;
 
         /* check the permissions */
-        ret = key_task_permission(key_ref, context, perm);
+        ret = key_task_permission(key_ref, cred, perm);
         if (ret < 0)
                 goto invalid_key;
 
 error:
+        put_cred(cred);
         return key_ref;
 
 invalid_key:
@@ -737,6 +675,12 @@ invalid_key:
         key_ref = ERR_PTR(ret);
         goto error;
 
+        /* if we attempted to install a keyring, then it may have caused new
+         * creds to be installed */
+reget_creds:
+        put_cred(cred);
+        goto try_again;
+
 } /* end lookup_user_key() */
 
 /*****************************************************************************/
@@ -748,20 +692,33 @@ invalid_key:
  */
 long join_session_keyring(const char *name)
 {
-        struct task_struct *tsk = current;
+        const struct cred *old;
+        struct cred *new;
         struct key *keyring;
-        long ret;
+        long ret, serial;
+
+        /* only permit this if there's a single thread in the thread group -
+         * this avoids us having to adjust the creds on all threads and risking
+         * ENOMEM */
+        if (!is_single_threaded(current))
+                return -EMLINK;
+
+        new = prepare_creds();
+        if (!new)
+                return -ENOMEM;
+        old = current_cred();
 
         /* if no name is provided, install an anonymous keyring */
         if (!name) {
-                ret = install_session_keyring(tsk, NULL);
+                ret = install_session_keyring_to_cred(new, NULL);
                 if (ret < 0)
                         goto error;
 
-                rcu_read_lock();
-                ret = rcu_dereference(tsk->signal->session_keyring)->serial;
-                rcu_read_unlock();
-                goto error;
+                serial = new->tgcred->session_keyring->serial;
+                ret = commit_creds(new);
+                if (ret == 0)
+                        ret = serial;
+                goto okay;
         }
 
         /* allow the user to join or create a named keyring */
@@ -771,29 +728,33 @@ long join_session_keyring(const char *name)
         keyring = find_keyring_by_name(name, false);
         if (PTR_ERR(keyring) == -ENOKEY) {
                 /* not found - try and create a new one */
-                keyring = keyring_alloc(name, tsk->uid, tsk->gid, tsk,
+                keyring = keyring_alloc(name, old->uid, old->gid, old,
                                         KEY_ALLOC_IN_QUOTA, NULL);
                 if (IS_ERR(keyring)) {
                         ret = PTR_ERR(keyring);
                         goto error2;
                 }
-        }
-        else if (IS_ERR(keyring)) {
+        } else if (IS_ERR(keyring)) {
                 ret = PTR_ERR(keyring);
                 goto error2;
         }
 
         /* we've got a keyring - now to install it */
-        ret = install_session_keyring(tsk, keyring);
+        ret = install_session_keyring_to_cred(new, keyring);
         if (ret < 0)
                 goto error2;
 
+        commit_creds(new);
+        mutex_unlock(&key_session_mutex);
+
         ret = keyring->serial;
         key_put(keyring);
+okay:
+        return ret;
 
 error2:
         mutex_unlock(&key_session_mutex);
 error:
+        abort_creds(new);
         return ret;
-
-} /* end join_session_keyring() */
+}
diff --git a/security/keys/request_key.c b/security/keys/request_key.c
index abea08f87fe2..0e04f72ef2d4 100644
--- a/security/keys/request_key.c
+++ b/security/keys/request_key.c
@@ -19,6 +19,8 @@
 #include <linux/slab.h>
 #include "internal.h"
 
+#define key_negative_timeout    60      /* default timeout on a negative key's existence */
+
 /*
  * wait_on_bit() sleep function for uninterruptible waiting
  */
@@ -64,7 +66,7 @@ static int call_sbin_request_key(struct key_construction *cons,
                                  const char *op,
                                  void *aux)
 {
-        struct task_struct *tsk = current;
+        const struct cred *cred = current_cred();
         key_serial_t prkey, sskey;
         struct key *key = cons->key, *authkey = cons->authkey, *keyring;
         char *argv[9], *envp[3], uid_str[12], gid_str[12];
@@ -74,15 +76,17 @@ static int call_sbin_request_key(struct key_construction *cons,
 
         kenter("{%d},{%d},%s", key->serial, authkey->serial, op);
 
-        ret = install_user_keyrings(tsk);
+        ret = install_user_keyrings();
         if (ret < 0)
                 goto error_alloc;
 
         /* allocate a new session keyring */
         sprintf(desc, "_req.%u", key->serial);
 
-        keyring = keyring_alloc(desc, current->fsuid, current->fsgid, current,
+        cred = get_current_cred();
+        keyring = keyring_alloc(desc, cred->fsuid, cred->fsgid, cred,
                                 KEY_ALLOC_QUOTA_OVERRUN, NULL);
+        put_cred(cred);
         if (IS_ERR(keyring)) {
                 ret = PTR_ERR(keyring);
                 goto error_alloc;
@@ -94,29 +98,24 @@ static int call_sbin_request_key(struct key_construction *cons,
                 goto error_link;
 
         /* record the UID and GID */
-        sprintf(uid_str, "%d", current->fsuid);
-        sprintf(gid_str, "%d", current->fsgid);
+        sprintf(uid_str, "%d", cred->fsuid);
+        sprintf(gid_str, "%d", cred->fsgid);
 
         /* we say which key is under construction */
         sprintf(key_str, "%d", key->serial);
 
         /* we specify the process's default keyrings */
         sprintf(keyring_str[0], "%d",
-                tsk->thread_keyring ? tsk->thread_keyring->serial : 0);
+                cred->thread_keyring ? cred->thread_keyring->serial : 0);
 
         prkey = 0;
-        if (tsk->signal->process_keyring)
-                prkey = tsk->signal->process_keyring->serial;
-
-        sprintf(keyring_str[1], "%d", prkey);
+        if (cred->tgcred->process_keyring)
+                prkey = cred->tgcred->process_keyring->serial;
 
-        if (tsk->signal->session_keyring) {
-                rcu_read_lock();
-                sskey = rcu_dereference(tsk->signal->session_keyring)->serial;
-                rcu_read_unlock();
-        } else {
-                sskey = tsk->user->session_keyring->serial;
-        }
+        if (cred->tgcred->session_keyring)
+                sskey = rcu_dereference(cred->tgcred->session_keyring)->serial;
+        else
+                sskey = cred->user->session_keyring->serial;
 
         sprintf(keyring_str[2], "%d", sskey);
 
@@ -157,8 +156,8 @@ error_link:
         key_put(keyring);
 
 error_alloc:
-        kleave(" = %d", ret);
         complete_request_key(cons, ret);
+        kleave(" = %d", ret);
         return ret;
 }
 
@@ -167,7 +166,8 @@ error_alloc:
  * - we ignore program failure and go on key status instead
  */
 static int construct_key(struct key *key, const void *callout_info,
-                         size_t callout_len, void *aux)
+                         size_t callout_len, void *aux,
+                         struct key *dest_keyring)
 {
         struct key_construction *cons;
         request_key_actor_t actor;
@@ -181,7 +181,8 @@ static int construct_key(struct key *key, const void *callout_info,
                 return -ENOMEM;
 
         /* allocate an authorisation key */
-        authkey = request_key_auth_new(key, callout_info, callout_len);
+        authkey = request_key_auth_new(key, callout_info, callout_len,
+                                       dest_keyring);
         if (IS_ERR(authkey)) {
                 kfree(cons);
                 ret = PTR_ERR(authkey);
@@ -209,46 +210,67 @@ static int construct_key(struct key *key, const void *callout_info,
 }
 
 /*
- * link a key to the appropriate destination keyring
- * - the caller must hold a write lock on the destination keyring
+ * get the appropriate destination keyring for the request
+ * - we return whatever keyring we select with an extra reference upon it which
+ *   the caller must release
  */
-static void construct_key_make_link(struct key *key, struct key *dest_keyring)
+static void construct_get_dest_keyring(struct key **_dest_keyring)
 {
-        struct task_struct *tsk = current;
-        struct key *drop = NULL;
+        struct request_key_auth *rka;
+        const struct cred *cred = current_cred();
+        struct key *dest_keyring = *_dest_keyring, *authkey;
 
-        kenter("{%d},%p", key->serial, dest_keyring);
+        kenter("%p", dest_keyring);
 
         /* find the appropriate keyring */
-        if (!dest_keyring) {
-                switch (tsk->jit_keyring) {
+        if (dest_keyring) {
+                /* the caller supplied one */
+                key_get(dest_keyring);
+        } else {
+                /* use a default keyring; falling through the cases until we
+                 * find one that we actually have */
+                switch (cred->jit_keyring) {
                 case KEY_REQKEY_DEFL_DEFAULT:
+                case KEY_REQKEY_DEFL_REQUESTOR_KEYRING:
+                        if (cred->request_key_auth) {
+                                authkey = cred->request_key_auth;
+                                down_read(&authkey->sem);
+                                rka = authkey->payload.data;
+                                if (!test_bit(KEY_FLAG_REVOKED,
+                                              &authkey->flags))
+                                        dest_keyring =
+                                                key_get(rka->dest_keyring);
+                                up_read(&authkey->sem);
+                                if (dest_keyring)
+                                        break;
+                        }
+
                 case KEY_REQKEY_DEFL_THREAD_KEYRING:
-                        dest_keyring = tsk->thread_keyring;
+                        dest_keyring = key_get(cred->thread_keyring);
                         if (dest_keyring)
                                 break;
 
                 case KEY_REQKEY_DEFL_PROCESS_KEYRING:
-                        dest_keyring = tsk->signal->process_keyring;
+                        dest_keyring = key_get(cred->tgcred->process_keyring);
                         if (dest_keyring)
                                 break;
 
                 case KEY_REQKEY_DEFL_SESSION_KEYRING:
                         rcu_read_lock();
                         dest_keyring = key_get(
-                                rcu_dereference(tsk->signal->session_keyring));
+                                rcu_dereference(cred->tgcred->session_keyring));
                         rcu_read_unlock();
-                        drop = dest_keyring;
 
                         if (dest_keyring)
                                 break;
 
                 case KEY_REQKEY_DEFL_USER_SESSION_KEYRING:
-                        dest_keyring = tsk->user->session_keyring;
+                        dest_keyring =
+                                key_get(cred->user->session_keyring);
                         break;
 
                 case KEY_REQKEY_DEFL_USER_KEYRING:
-                        dest_keyring = tsk->user->uid_keyring;
+                        dest_keyring = key_get(cred->user->uid_keyring);
                         break;
 
                 case KEY_REQKEY_DEFL_GROUP_KEYRING:
@@ -257,10 +279,9 @@ static void construct_key_make_link(struct key *key, struct key *dest_keyring)
                 }
         }
 
-        /* and attach the key to it */
-        __key_link(dest_keyring, key);
-        key_put(drop);
-        kleave("");
+        *_dest_keyring = dest_keyring;
+        kleave(" [dk %d]", key_serial(dest_keyring));
+        return;
 }
 
 /*
@@ -275,6 +296,7 @@ static int construct_alloc_key(struct key_type *type,
                                struct key_user *user,
                                struct key **_key)
 {
+        const struct cred *cred = current_cred();
         struct key *key;
         key_ref_t key_ref;
 
@@ -282,33 +304,28 @@ static int construct_alloc_key(struct key_type *type,
 
         mutex_lock(&user->cons_lock);
 
-        key = key_alloc(type, description,
-                        current->fsuid, current->fsgid, current, KEY_POS_ALL,
-                        flags);
+        key = key_alloc(type, description, cred->fsuid, cred->fsgid, cred,
+                        KEY_POS_ALL, flags);
         if (IS_ERR(key))
                 goto alloc_failed;
 
         set_bit(KEY_FLAG_USER_CONSTRUCT, &key->flags);
 
-        if (dest_keyring)
-                down_write(&dest_keyring->sem);
+        down_write(&dest_keyring->sem);
 
         /* attach the key to the destination keyring under lock, but we do need
          * to do another check just in case someone beat us to it whilst we
          * waited for locks */
         mutex_lock(&key_construction_mutex);
 
-        key_ref = search_process_keyrings(type, description, type->match,
-                                          current);
+        key_ref = search_process_keyrings(type, description, type->match, cred);
         if (!IS_ERR(key_ref))
                 goto key_already_present;
 
-        if (dest_keyring)
-                construct_key_make_link(key, dest_keyring);
+        __key_link(dest_keyring, key);
 
         mutex_unlock(&key_construction_mutex);
-        if (dest_keyring)
-                up_write(&dest_keyring->sem);
+        up_write(&dest_keyring->sem);
         mutex_unlock(&user->cons_lock);
         *_key = key;
         kleave(" = 0 [%d]", key_serial(key));
@@ -346,25 +363,36 @@ static struct key *construct_key_and_link(struct key_type *type,
         struct key *key;
         int ret;
 
-        user = key_user_lookup(current->fsuid);
+        kenter("");
+
+        user = key_user_lookup(current_fsuid());
         if (!user)
                 return ERR_PTR(-ENOMEM);
 
+        construct_get_dest_keyring(&dest_keyring);
+
         ret = construct_alloc_key(type, description, dest_keyring, flags, user,
                                   &key);
         key_user_put(user);
 
         if (ret == 0) {
-                ret = construct_key(key, callout_info, callout_len, aux);
-                if (ret < 0)
+                ret = construct_key(key, callout_info, callout_len, aux,
+                                    dest_keyring);
+                if (ret < 0) {
+                        kdebug("cons failed");
                         goto construction_failed;
+                }
         }
 
+        key_put(dest_keyring);
+        kleave(" = key %d", key_serial(key));
         return key;
 
 construction_failed:
         key_negate_and_link(key, key_negative_timeout, NULL, NULL);
         key_put(key);
+        key_put(dest_keyring);
+        kleave(" = %d", ret);
         return ERR_PTR(ret);
 }
 
@@ -383,6 +411,7 @@ struct key *request_key_and_link(struct key_type *type,
                                  struct key *dest_keyring,
                                  unsigned long flags)
 {
+        const struct cred *cred = current_cred();
         struct key *key;
         key_ref_t key_ref;
 
@@ -392,7 +421,7 @@ struct key *request_key_and_link(struct key_type *type,
 
         /* search all the process keyrings for a key */
         key_ref = search_process_keyrings(type, description, type->match,
-                                          current);
+                                          cred);
 
         if (!IS_ERR(key_ref)) {
                 key = key_ref_to_ptr(key_ref);
diff --git a/security/keys/request_key_auth.c b/security/keys/request_key_auth.c
index bd237b0a6331..86747151ee5b 100644
--- a/security/keys/request_key_auth.c
+++ b/security/keys/request_key_auth.c
@@ -105,9 +105,9 @@ static void request_key_auth_revoke(struct key *key)
 
         kenter("{%d}", key->serial);
 
-        if (rka->context) {
-                put_task_struct(rka->context);
-                rka->context = NULL;
+        if (rka->cred) {
+                put_cred(rka->cred);
+                rka->cred = NULL;
         }
 
 } /* end request_key_auth_revoke() */
@@ -122,12 +122,13 @@ static void request_key_auth_destroy(struct key *key)
 
         kenter("{%d}", key->serial);
 
-        if (rka->context) {
-                put_task_struct(rka->context);
-                rka->context = NULL;
+        if (rka->cred) {
+                put_cred(rka->cred);
+                rka->cred = NULL;
         }
 
         key_put(rka->target_key);
+        key_put(rka->dest_keyring);
         kfree(rka->callout_info);
         kfree(rka);
 
@@ -139,9 +140,10 @@ static void request_key_auth_destroy(struct key *key)
  * access to the caller's security data
  */
 struct key *request_key_auth_new(struct key *target, const void *callout_info,
-                                 size_t callout_len)
+                                 size_t callout_len, struct key *dest_keyring)
 {
         struct request_key_auth *rka, *irka;
+        const struct cred *cred = current->cred;
         struct key *authkey = NULL;
         char desc[20];
         int ret;
@@ -163,31 +165,29 @@ struct key *request_key_auth_new(struct key *target, const void *callout_info,
 
         /* see if the calling process is already servicing the key request of
          * another process */
-        if (current->request_key_auth) {
+        if (cred->request_key_auth) {
                 /* it is - use that instantiation context here too */
-                down_read(&current->request_key_auth->sem);
+                down_read(&cred->request_key_auth->sem);
 
                 /* if the auth key has been revoked, then the key we're
                  * servicing is already instantiated */
-                if (test_bit(KEY_FLAG_REVOKED,
-                             &current->request_key_auth->flags))
+                if (test_bit(KEY_FLAG_REVOKED, &cred->request_key_auth->flags))
                         goto auth_key_revoked;
 
-                irka = current->request_key_auth->payload.data;
-                rka->context = irka->context;
+                irka = cred->request_key_auth->payload.data;
+                rka->cred = get_cred(irka->cred);
                 rka->pid = irka->pid;
-                get_task_struct(rka->context);
 
-                up_read(&current->request_key_auth->sem);
+                up_read(&cred->request_key_auth->sem);
         }
         else {
                 /* it isn't - use this process as the context */
-                rka->context = current;
+                rka->cred = get_cred(cred);
                 rka->pid = current->pid;
-                get_task_struct(rka->context);
         }
 
         rka->target_key = key_get(target);
+        rka->dest_keyring = key_get(dest_keyring);
         memcpy(rka->callout_info, callout_info, callout_len);
         rka->callout_len = callout_len;
 
@@ -195,7 +195,7 @@ struct key *request_key_auth_new(struct key *target, const void *callout_info,
         sprintf(desc, "%x", target->serial);
 
         authkey = key_alloc(&key_type_request_key_auth, desc,
-                            current->fsuid, current->fsgid, current,
+                            cred->fsuid, cred->fsgid, cred,
                             KEY_POS_VIEW | KEY_POS_READ | KEY_POS_SEARCH |
                             KEY_USR_VIEW, KEY_ALLOC_NOT_IN_QUOTA);
         if (IS_ERR(authkey)) {
@@ -203,16 +203,16 @@ struct key *request_key_auth_new(struct key *target, const void *callout_info,
                 goto error_alloc;
         }
 
-        /* construct and attach to the keyring */
+        /* construct the auth key */
         ret = key_instantiate_and_link(authkey, rka, 0, NULL, NULL);
         if (ret < 0)
                 goto error_inst;
 
-        kleave(" = {%d}", authkey->serial);
+        kleave(" = {%d,%d}", authkey->serial, atomic_read(&authkey->usage));
         return authkey;
 
 auth_key_revoked:
-        up_read(&current->request_key_auth->sem);
+        up_read(&cred->request_key_auth->sem);
         kfree(rka->callout_info);
         kfree(rka);
         kleave("= -EKEYREVOKED");
@@ -223,6 +223,7 @@ error_inst:
         key_put(authkey);
 error_alloc:
         key_put(rka->target_key);
+        key_put(rka->dest_keyring);
         kfree(rka->callout_info);
         kfree(rka);
         kleave("= %d", ret);
@@ -254,6 +255,7 @@ static int key_get_instantiation_authkey_match(const struct key *key,
  */
 struct key *key_get_instantiation_authkey(key_serial_t target_id)
 {
+        const struct cred *cred = current_cred();
         struct key *authkey;
         key_ref_t authkey_ref;
 
@@ -261,7 +263,7 @@ struct key *key_get_instantiation_authkey(key_serial_t target_id)
                 &key_type_request_key_auth,
                 (void *) (unsigned long) target_id,
                 key_get_instantiation_authkey_match,
-                current);
+                cred);
 
         if (IS_ERR(authkey_ref)) {
                 authkey = ERR_CAST(authkey_ref);
diff --git a/security/root_plug.c b/security/root_plug.c
index c3f68b5b372d..40fb4f15e27b 100644
--- a/security/root_plug.c
+++ b/security/root_plug.c
@@ -55,9 +55,9 @@ static int rootplug_bprm_check_security (struct linux_binprm *bprm)
         struct usb_device *dev;
 
         root_dbg("file %s, e_uid = %d, e_gid = %d\n",
-                 bprm->filename, bprm->e_uid, bprm->e_gid);
+                 bprm->filename, bprm->cred->euid, bprm->cred->egid);
 
-        if (bprm->e_gid == 0) {
+        if (bprm->cred->egid == 0) {
                 dev = usb_find_device(vendor_id, product_id);
                 if (!dev) {
                         root_dbg("e_gid = 0, and device not found, "
@@ -75,15 +75,12 @@ static struct security_operations rootplug_security_ops = {
         .ptrace_may_access =            cap_ptrace_may_access,
         .ptrace_traceme =               cap_ptrace_traceme,
         .capget =                       cap_capget,
-        .capset_check =                 cap_capset_check,
-        .capset_set =                   cap_capset_set,
+        .capset =                       cap_capset,
         .capable =                      cap_capable,
 
-        .bprm_apply_creds =             cap_bprm_apply_creds,
-        .bprm_set_security =            cap_bprm_set_security,
+        .bprm_set_creds =               cap_bprm_set_creds,
 
-        .task_post_setuid =             cap_task_post_setuid,
-        .task_reparent_to_init =        cap_task_reparent_to_init,
+        .task_fix_setuid =              cap_task_fix_setuid,
         .task_prctl =                   cap_task_prctl,
 
         .bprm_check_security =          rootplug_bprm_check_security,
diff --git a/security/security.c b/security/security.c
index c0acfa7177e5..d85dbb37c972 100644
--- a/security/security.c
+++ b/security/security.c
@@ -145,25 +145,23 @@ int security_capget(struct task_struct *target,
         return security_ops->capget(target, effective, inheritable, permitted);
 }
 
-int security_capset_check(struct task_struct *target,
-                           kernel_cap_t *effective,
-                           kernel_cap_t *inheritable,
-                           kernel_cap_t *permitted)
+int security_capset(struct cred *new, const struct cred *old,
+                    const kernel_cap_t *effective,
+                    const kernel_cap_t *inheritable,
+                    const kernel_cap_t *permitted)
 {
-        return security_ops->capset_check(target, effective, inheritable, permitted);
+        return security_ops->capset(new, old,
+                                    effective, inheritable, permitted);
 }
 
-void security_capset_set(struct task_struct *target,
-                          kernel_cap_t *effective,
-                          kernel_cap_t *inheritable,
-                          kernel_cap_t *permitted)
+int security_capable(struct task_struct *tsk, int cap)
 {
-        security_ops->capset_set(target, effective, inheritable, permitted);
+        return security_ops->capable(tsk, cap, SECURITY_CAP_AUDIT);
 }
 
-int security_capable(struct task_struct *tsk, int cap)
+int security_capable_noaudit(struct task_struct *tsk, int cap)
 {
-        return security_ops->capable(tsk, cap);
+        return security_ops->capable(tsk, cap, SECURITY_CAP_NOAUDIT);
 }
 
 int security_acct(struct file *file)
@@ -215,34 +213,24 @@ int security_vm_enough_memory_kern(long pages)
         return security_ops->vm_enough_memory(current->mm, pages);
 }
 
-int security_bprm_alloc(struct linux_binprm *bprm)
-{
-        return security_ops->bprm_alloc_security(bprm);
-}
-
-void security_bprm_free(struct linux_binprm *bprm)
-{
-        security_ops->bprm_free_security(bprm);
-}
-
-void security_bprm_apply_creds(struct linux_binprm *bprm, int unsafe)
+int security_bprm_set_creds(struct linux_binprm *bprm)
 {
-        security_ops->bprm_apply_creds(bprm, unsafe);
+        return security_ops->bprm_set_creds(bprm);
 }
 
-void security_bprm_post_apply_creds(struct linux_binprm *bprm)
+int security_bprm_check(struct linux_binprm *bprm)
 {
-        security_ops->bprm_post_apply_creds(bprm);
+        return security_ops->bprm_check_security(bprm);
 }
 
-int security_bprm_set(struct linux_binprm *bprm)
+void security_bprm_committing_creds(struct linux_binprm *bprm)
 {
-        return security_ops->bprm_set_security(bprm);
+        security_ops->bprm_committing_creds(bprm);
 }
 
-int security_bprm_check(struct linux_binprm *bprm)
+void security_bprm_committed_creds(struct linux_binprm *bprm)
 {
-        return security_ops->bprm_check_security(bprm);
+        security_ops->bprm_committed_creds(bprm);
 }
 
 int security_bprm_secureexec(struct linux_binprm *bprm)
@@ -266,9 +254,9 @@ int security_sb_copy_data(char *orig, char *copy)
 }
 EXPORT_SYMBOL(security_sb_copy_data);
 
-int security_sb_kern_mount(struct super_block *sb, void *data)
+int security_sb_kern_mount(struct super_block *sb, int flags, void *data)
 {
-        return security_ops->sb_kern_mount(sb, data);
+        return security_ops->sb_kern_mount(sb, flags, data);
 }
 
 int security_sb_show_options(struct seq_file *m, struct super_block *sb)
@@ -603,9 +591,9 @@ int security_file_receive(struct file *file)
         return security_ops->file_receive(file);
 }
 
-int security_dentry_open(struct file *file)
+int security_dentry_open(struct file *file, const struct cred *cred)
 {
-        return security_ops->dentry_open(file);
+        return security_ops->dentry_open(file, cred);
 }
 
 int security_task_create(unsigned long clone_flags)
@@ -613,14 +601,29 @@ int security_task_create(unsigned long clone_flags)
         return security_ops->task_create(clone_flags);
 }
 
-int security_task_alloc(struct task_struct *p)
+void security_cred_free(struct cred *cred)
 {
-        return security_ops->task_alloc_security(p);
+        security_ops->cred_free(cred);
 }
 
-void security_task_free(struct task_struct *p)
+int security_prepare_creds(struct cred *new, const struct cred *old, gfp_t gfp)
 {
-        security_ops->task_free_security(p);
+        return security_ops->cred_prepare(new, old, gfp);
+}
+
+void security_commit_creds(struct cred *new, const struct cred *old)
+{
+        security_ops->cred_commit(new, old);
+}
+
+int security_kernel_act_as(struct cred *new, u32 secid)
+{
+        return security_ops->kernel_act_as(new, secid);
+}
+
+int security_kernel_create_files_as(struct cred *new, struct inode *inode)
+{
+        return security_ops->kernel_create_files_as(new, inode);
 }
 
 int security_task_setuid(uid_t id0, uid_t id1, uid_t id2, int flags)
@@ -628,10 +631,10 @@ int security_task_setuid(uid_t id0, uid_t id1, uid_t id2, int flags)
         return security_ops->task_setuid(id0, id1, id2, flags);
 }
 
-int security_task_post_setuid(uid_t old_ruid, uid_t old_euid,
-                               uid_t old_suid, int flags)
+int security_task_fix_setuid(struct cred *new, const struct cred *old,
+                             int flags)
 {
-        return security_ops->task_post_setuid(old_ruid, old_euid, old_suid, flags);
+        return security_ops->task_fix_setuid(new, old, flags);
 }
 
 int security_task_setgid(gid_t id0, gid_t id1, gid_t id2, int flags)
@@ -713,14 +716,9 @@ int security_task_wait(struct task_struct *p)
 }
 
 int security_task_prctl(int option, unsigned long arg2, unsigned long arg3,
-                         unsigned long arg4, unsigned long arg5, long *rc_p)
-{
-        return security_ops->task_prctl(option, arg2, arg3, arg4, arg5, rc_p);
-}
-
-void security_task_reparent_to_init(struct task_struct *p)
+                         unsigned long arg4, unsigned long arg5)
 {
-        security_ops->task_reparent_to_init(p);
+        return security_ops->task_prctl(option, arg2, arg3, arg4, arg5);
 }
 
 void security_task_to_inode(struct task_struct *p, struct inode *inode)
@@ -1120,9 +1118,10 @@ EXPORT_SYMBOL(security_skb_classify_flow);
 
 #ifdef CONFIG_KEYS
 
-int security_key_alloc(struct key *key, struct task_struct *tsk, unsigned long flags)
+int security_key_alloc(struct key *key, const struct cred *cred,
+                       unsigned long flags)
 {
-        return security_ops->key_alloc(key, tsk, flags);
+        return security_ops->key_alloc(key, cred, flags);
 }
 
 void security_key_free(struct key *key)
@@ -1131,9 +1130,9 @@ void security_key_free(struct key *key)
 }
 
 int security_key_permission(key_ref_t key_ref,
-                            struct task_struct *context, key_perm_t perm)
+                            const struct cred *cred, key_perm_t perm)
 {
-        return security_ops->key_permission(key_ref, context, perm);
+        return security_ops->key_permission(key_ref, cred, perm);
 }
 
 int security_key_getsecurity(struct key *key, char **_buffer)
diff --git a/security/selinux/exports.c b/security/selinux/exports.c
index 64af2d3409ef..c73aeaa008e8 100644
--- a/security/selinux/exports.c
+++ b/security/selinux/exports.c
@@ -39,9 +39,13 @@ EXPORT_SYMBOL_GPL(selinux_string_to_sid);
 int selinux_secmark_relabel_packet_permission(u32 sid)
 {
         if (selinux_enabled) {
-                struct task_security_struct *tsec = current->security;
+                const struct task_security_struct *__tsec;
+                u32 tsid;
 
-                return avc_has_perm(tsec->sid, sid, SECCLASS_PACKET,
+                __tsec = current_security();
+                tsid = __tsec->sid;
+
+                return avc_has_perm(tsid, sid, SECCLASS_PACKET,
                                     PACKET__RELABELTO, NULL);
         }
         return 0;
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index f85597a4d733..853b58c8b2cb 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -156,33 +156,62 @@ static int selinux_secmark_enabled(void)
         return (atomic_read(&selinux_secmark_refcount) > 0);
 }
 
-/* Allocate and free functions for each kind of security blob. */
-
-static int task_alloc_security(struct task_struct *task)
+/*
+ * initialise the security for the init task
+ */
+static void cred_init_security(void)
 {
+        struct cred *cred = (struct cred *) current->real_cred;
         struct task_security_struct *tsec;
 
         tsec = kzalloc(sizeof(struct task_security_struct), GFP_KERNEL);
         if (!tsec)
-                return -ENOMEM;
+                panic("SELinux:  Failed to initialize initial task.\n");
 
-        tsec->osid = tsec->sid = SECINITSID_UNLABELED;
-        task->security = tsec;
+        tsec->osid = tsec->sid = SECINITSID_KERNEL;
+        cred->security = tsec;
+}
 
-        return 0;
+/*
+ * get the security ID of a set of credentials
+ */
+static inline u32 cred_sid(const struct cred *cred)
+{
+        const struct task_security_struct *tsec;
+
+        tsec = cred->security;
+        return tsec->sid;
 }
 
-static void task_free_security(struct task_struct *task)
+/*
+ * get the objective security ID of a task
+ */
+static inline u32 task_sid(const struct task_struct *task)
 {
-        struct task_security_struct *tsec = task->security;
-        task->security = NULL;
-        kfree(tsec);
+        u32 sid;
+
+        rcu_read_lock();
+        sid = cred_sid(__task_cred(task));
+        rcu_read_unlock();
+        return sid;
 }
 
+/*
+ * get the subjective security ID of the current task
+ */
+static inline u32 current_sid(void)
+{
+        const struct task_security_struct *tsec = current_cred()->security;
+
+        return tsec->sid;
+}
+
+/* Allocate and free functions for each kind of security blob. */
+
 static int inode_alloc_security(struct inode *inode)
 {
-        struct task_security_struct *tsec = current->security;
         struct inode_security_struct *isec;
+        u32 sid = current_sid();
 
         isec = kmem_cache_zalloc(sel_inode_cache, GFP_NOFS);
         if (!isec)
@@ -193,7 +222,7 @@ static int inode_alloc_security(struct inode *inode)
         isec->inode = inode;
         isec->sid = SECINITSID_UNLABELED;
         isec->sclass = SECCLASS_FILE;
-        isec->task_sid = tsec->sid;
+        isec->task_sid = sid;
         inode->i_security = isec;
 
         return 0;
@@ -215,15 +244,15 @@ static void inode_free_security(struct inode *inode)
 
 static int file_alloc_security(struct file *file)
 {
-        struct task_security_struct *tsec = current->security;
         struct file_security_struct *fsec;
+        u32 sid = current_sid();
 
         fsec = kzalloc(sizeof(struct file_security_struct), GFP_KERNEL);
         if (!fsec)
                 return -ENOMEM;
 
-        fsec->sid = tsec->sid;
-        fsec->fown_sid = tsec->sid;
+        fsec->sid = sid;
+        fsec->fown_sid = sid;
         file->f_security = fsec;
 
         return 0;
@@ -338,8 +367,9 @@ static const match_table_t tokens = {
 
 static int may_context_mount_sb_relabel(u32 sid,
                         struct superblock_security_struct *sbsec,
-                        struct task_security_struct *tsec)
+                        const struct cred *cred)
 {
+        const struct task_security_struct *tsec = cred->security;
         int rc;
 
         rc = avc_has_perm(tsec->sid, sbsec->sid, SECCLASS_FILESYSTEM,
@@ -354,8 +384,9 @@ static int may_context_mount_sb_relabel(u32 sid,
 
 static int may_context_mount_inode_relabel(u32 sid,
                         struct superblock_security_struct *sbsec,
-                        struct task_security_struct *tsec)
+                        const struct cred *cred)
 {
+        const struct task_security_struct *tsec = cred->security;
         int rc;
         rc = avc_has_perm(tsec->sid, sbsec->sid, SECCLASS_FILESYSTEM,
                           FILESYSTEM__RELABELFROM, NULL);
@@ -553,8 +584,8 @@ static int bad_option(struct superblock_security_struct *sbsec, char flag,
 static int selinux_set_mnt_opts(struct super_block *sb,
                                 struct security_mnt_opts *opts)
 {
+        const struct cred *cred = current_cred();
         int rc = 0, i;
-        struct task_security_struct *tsec = current->security;
         struct superblock_security_struct *sbsec = sb->s_security;
         const char *name = sb->s_type->name;
         struct inode *inode = sbsec->sb->s_root->d_inode;
@@ -671,7 +702,7 @@ static int selinux_set_mnt_opts(struct super_block *sb,
                 sbsec->proc = 1;
 
         /* Determine the labeling behavior to use for this filesystem type. */
-        rc = security_fs_use(sb->s_type->name, &sbsec->behavior, &sbsec->sid);
+        rc = security_fs_use(sbsec->proc ? "proc" : sb->s_type->name, &sbsec->behavior, &sbsec->sid);
         if (rc) {
                 printk(KERN_WARNING "%s: security_fs_use(%s) returned %d\n",
                        __func__, sb->s_type->name, rc);
@@ -680,8 +711,7 @@ static int selinux_set_mnt_opts(struct super_block *sb,
 
         /* sets the context of the superblock for the fs being mounted. */
         if (fscontext_sid) {
-
-                rc = may_context_mount_sb_relabel(fscontext_sid, sbsec, tsec);
+                rc = may_context_mount_sb_relabel(fscontext_sid, sbsec, cred);
                 if (rc)
                         goto out;
 
@@ -695,12 +725,14 @@ static int selinux_set_mnt_opts(struct super_block *sb,
          */
         if (context_sid) {
                 if (!fscontext_sid) {
-                        rc = may_context_mount_sb_relabel(context_sid, sbsec, tsec);
+                        rc = may_context_mount_sb_relabel(context_sid, sbsec,
+                                                          cred);
                         if (rc)
                                 goto out;
                         sbsec->sid = context_sid;
                 } else {
-                        rc = may_context_mount_inode_relabel(context_sid, sbsec, tsec);
+                        rc = may_context_mount_inode_relabel(context_sid, sbsec,
+                                                             cred);
                         if (rc)
                                 goto out;
                 }
@@ -712,7 +744,8 @@ static int selinux_set_mnt_opts(struct super_block *sb,
         }
 
         if (rootcontext_sid) {
-                rc = may_context_mount_inode_relabel(rootcontext_sid, sbsec, tsec);
+                rc = may_context_mount_inode_relabel(rootcontext_sid, sbsec,
+                                                     cred);
                 if (rc)
                         goto out;
 
@@ -730,7 +763,7 @@ static int selinux_set_mnt_opts(struct super_block *sb,
 
                 if (defcontext_sid != sbsec->def_sid) {
                         rc = may_context_mount_inode_relabel(defcontext_sid,
-                                                             sbsec, tsec);
+                                                             sbsec, cred);
                         if (rc)
                                 goto out;
                 }
@@ -1345,18 +1378,53 @@ static inline u32 signal_to_av(int sig)
         return perm;
 }
 
-/* Check permission betweeen a pair of tasks, e.g. signal checks,
-   fork check, ptrace check, etc. */
-static int task_has_perm(struct task_struct *tsk1,
-                         struct task_struct *tsk2,
+/*
+ * Check permission between a pair of credentials
+ * fork check, ptrace check, etc.
+ */
+static int cred_has_perm(const struct cred *actor,
+                         const struct cred *target,
+                         u32 perms)
+{
+        u32 asid = cred_sid(actor), tsid = cred_sid(target);
+
+        return avc_has_perm(asid, tsid, SECCLASS_PROCESS, perms, NULL);
+}
+
+/*
+ * Check permission between a pair of tasks, e.g. signal checks,
+ * fork check, ptrace check, etc.
+ * tsk1 is the actor and tsk2 is the target
+ * - this uses the default subjective creds of tsk1
+ */
+static int task_has_perm(const struct task_struct *tsk1,
+                         const struct task_struct *tsk2,
                          u32 perms)
 {
-        struct task_security_struct *tsec1, *tsec2;
+        const struct task_security_struct *__tsec1, *__tsec2;
+        u32 sid1, sid2;
 
-        tsec1 = tsk1->security;
-        tsec2 = tsk2->security;
-        return avc_has_perm(tsec1->sid, tsec2->sid,
-                            SECCLASS_PROCESS, perms, NULL);
+        rcu_read_lock();
+        __tsec1 = __task_cred(tsk1)->security;  sid1 = __tsec1->sid;
+        __tsec2 = __task_cred(tsk2)->security;  sid2 = __tsec2->sid;
+        rcu_read_unlock();
+        return avc_has_perm(sid1, sid2, SECCLASS_PROCESS, perms, NULL);
+}
+
+/*
+ * Check permission between current and another task, e.g. signal checks,
+ * fork check, ptrace check, etc.
+ * current is the actor and tsk2 is the target
+ * - this uses current's subjective creds
+ */
+static int current_has_perm(const struct task_struct *tsk,
+                            u32 perms)
+{
+        u32 sid, tsid;
+
+        sid = current_sid();
+        tsid = task_sid(tsk);
+        return avc_has_perm(sid, tsid, SECCLASS_PROCESS, perms, NULL);
 }
 
 #if CAP_LAST_CAP > 63
@@ -1365,14 +1433,14 @@ static int task_has_perm(struct task_struct *tsk1,
 
 /* Check whether a task is allowed to use a capability. */
 static int task_has_capability(struct task_struct *tsk,
-                               int cap)
+                               int cap, int audit)
 {
-        struct task_security_struct *tsec;
         struct avc_audit_data ad;
+        struct av_decision avd;
         u16 sclass;
+        u32 sid = task_sid(tsk);
         u32 av = CAP_TO_MASK(cap);
-
-        tsec = tsk->security;
+        int rc;
 
         AVC_AUDIT_DATA_INIT(&ad, CAP);
         ad.tsk = tsk;
@@ -1390,37 +1458,39 @@ static int task_has_capability(struct task_struct *tsk,
                        "SELinux:  out of range capability %d\n", cap);
                 BUG();
         }
-        return avc_has_perm(tsec->sid, tsec->sid, sclass, av, &ad);
+
+        rc = avc_has_perm_noaudit(sid, sid, sclass, av, 0, &avd);
+        if (audit == SECURITY_CAP_AUDIT)
+                avc_audit(sid, sid, sclass, av, &avd, rc, &ad);
+        return rc;
 }
 
 /* Check whether a task is allowed to use a system operation. */
 static int task_has_system(struct task_struct *tsk,
                            u32 perms)
 {
-        struct task_security_struct *tsec;
+        u32 sid = task_sid(tsk);
 
-        tsec = tsk->security;
-
-        return avc_has_perm(tsec->sid, SECINITSID_KERNEL,
+        return avc_has_perm(sid, SECINITSID_KERNEL,
                             SECCLASS_SYSTEM, perms, NULL);
 }
 
 /* Check whether a task has a particular permission to an inode.
    The 'adp' parameter is optional and allows other audit
    data to be passed (e.g. the dentry). */
-static int inode_has_perm(struct task_struct *tsk,
+static int inode_has_perm(const struct cred *cred,
                           struct inode *inode,
                           u32 perms,
                           struct avc_audit_data *adp)
 {
-        struct task_security_struct *tsec;
         struct inode_security_struct *isec;
         struct avc_audit_data ad;
+        u32 sid;
 
         if (unlikely(IS_PRIVATE(inode)))
                 return 0;
 
-        tsec = tsk->security;
+        sid = cred_sid(cred);
         isec = inode->i_security;
 
         if (!adp) {
@@ -1429,23 +1499,24 @@ static int inode_has_perm(struct task_struct *tsk,
                 ad.u.fs.inode = inode;
         }
 
-        return avc_has_perm(tsec->sid, isec->sid, isec->sclass, perms, adp);
+        return avc_has_perm(sid, isec->sid, isec->sclass, perms, adp);
 }
 
 /* Same as inode_has_perm, but pass explicit audit data containing
    the dentry to help the auditing code to more easily generate the
    pathname if needed. */
-static inline int dentry_has_perm(struct task_struct *tsk,
+static inline int dentry_has_perm(const struct cred *cred,
                                   struct vfsmount *mnt,
                                   struct dentry *dentry,
                                   u32 av)
 {
         struct inode *inode = dentry->d_inode;
         struct avc_audit_data ad;
+
         AVC_AUDIT_DATA_INIT(&ad, FS);
         ad.u.fs.path.mnt = mnt;
         ad.u.fs.path.dentry = dentry;
-        return inode_has_perm(tsk, inode, av, &ad);
+        return inode_has_perm(cred, inode, av, &ad);
 }
 
 /* Check whether a task can use an open file descriptor to
@@ -1456,33 +1527,35 @@ static inline int dentry_has_perm(struct task_struct *tsk,
    has the same SID as the process.  If av is zero, then
    access to the file is not checked, e.g. for cases
    where only the descriptor is affected like seek. */
-static int file_has_perm(struct task_struct *tsk,
-                                struct file *file,
-                                u32 av)
+static int file_has_perm(const struct cred *cred,
+                         struct file *file,
+                         u32 av)
 {
-        struct task_security_struct *tsec = tsk->security;
         struct file_security_struct *fsec = file->f_security;
         struct inode *inode = file->f_path.dentry->d_inode;
         struct avc_audit_data ad;
+        u32 sid = cred_sid(cred);
         int rc;
 
         AVC_AUDIT_DATA_INIT(&ad, FS);
         ad.u.fs.path = file->f_path;
 
-        if (tsec->sid != fsec->sid) {
-                rc = avc_has_perm(tsec->sid, fsec->sid,
+        if (sid != fsec->sid) {
+                rc = avc_has_perm(sid, fsec->sid,
                                   SECCLASS_FD,
                                   FD__USE,
                                   &ad);
                 if (rc)
-                        return rc;
+                        goto out;
         }
 
         /* av is zero if only checking access to the descriptor. */
+        rc = 0;
         if (av)
-                return inode_has_perm(tsk, inode, av, &ad);
+                rc = inode_has_perm(cred, inode, av, &ad);
 
-        return 0;
+out:
+        return rc;
 }
 
 /* Check whether a task can create a file. */
@@ -1490,36 +1563,36 @@ static int may_create(struct inode *dir,
                       struct dentry *dentry,
                       u16 tclass)
 {
-        struct task_security_struct *tsec;
+        const struct cred *cred = current_cred();
+        const struct task_security_struct *tsec = cred->security;
         struct inode_security_struct *dsec;
         struct superblock_security_struct *sbsec;
-        u32 newsid;
+        u32 sid, newsid;
         struct avc_audit_data ad;
         int rc;
 
-        tsec = current->security;
         dsec = dir->i_security;
         sbsec = dir->i_sb->s_security;
 
+        sid = tsec->sid;
+        newsid = tsec->create_sid;
+
         AVC_AUDIT_DATA_INIT(&ad, FS);
         ad.u.fs.path.dentry = dentry;
 
-        rc = avc_has_perm(tsec->sid, dsec->sid, SECCLASS_DIR,
+        rc = avc_has_perm(sid, dsec->sid, SECCLASS_DIR,
                           DIR__ADD_NAME | DIR__SEARCH,
                           &ad);
         if (rc)
                 return rc;
 
-        if (tsec->create_sid && sbsec->behavior != SECURITY_FS_USE_MNTPOINT) {
-                newsid = tsec->create_sid;
-        } else {
-                rc = security_transition_sid(tsec->sid, dsec->sid, tclass,
-                                             &newsid);
+        if (!newsid || sbsec->behavior == SECURITY_FS_USE_MNTPOINT) {
+                rc = security_transition_sid(sid, dsec->sid, tclass, &newsid);
                 if (rc)
                         return rc;
         }
 
-        rc = avc_has_perm(tsec->sid, newsid, tclass, FILE__CREATE, &ad);
+        rc = avc_has_perm(sid, newsid, tclass, FILE__CREATE, &ad);
         if (rc)
                 return rc;
 
@@ -1532,11 +1605,9 @@ static int may_create(struct inode *dir,
 static int may_create_key(u32 ksid,
                           struct task_struct *ctx)
 {
-        struct task_security_struct *tsec;
+        u32 sid = task_sid(ctx);
 
-        tsec = ctx->security;
-
-        return avc_has_perm(tsec->sid, ksid, SECCLASS_KEY, KEY__CREATE, NULL);
+        return avc_has_perm(sid, ksid, SECCLASS_KEY, KEY__CREATE, NULL);
 }
 
 #define MAY_LINK        0
@@ -1549,13 +1620,12 @@ static int may_link(struct inode *dir,
                     int kind)
 
 {
-        struct task_security_struct *tsec;
         struct inode_security_struct *dsec, *isec;
         struct avc_audit_data ad;
+        u32 sid = current_sid();
         u32 av;
         int rc;
 
-        tsec = current->security;
         dsec = dir->i_security;
         isec = dentry->d_inode->i_security;
 
@@ -1564,7 +1634,7 @@ static int may_link(struct inode *dir,
 
         av = DIR__SEARCH;
         av |= (kind ? DIR__REMOVE_NAME : DIR__ADD_NAME);
-        rc = avc_has_perm(tsec->sid, dsec->sid, SECCLASS_DIR, av, &ad);
+        rc = avc_has_perm(sid, dsec->sid, SECCLASS_DIR, av, &ad);
         if (rc)
                 return rc;
 
@@ -1584,7 +1654,7 @@ static int may_link(struct inode *dir,
                 return 0;
         }
 
-        rc = avc_has_perm(tsec->sid, isec->sid, isec->sclass, av, &ad);
+        rc = avc_has_perm(sid, isec->sid, isec->sclass, av, &ad);
         return rc;
 }
 
@@ -1593,14 +1663,13 @@ static inline int may_rename(struct inode *old_dir,
                              struct inode *new_dir,
                              struct dentry *new_dentry)
 {
-        struct task_security_struct *tsec;
         struct inode_security_struct *old_dsec, *new_dsec, *old_isec, *new_isec;
         struct avc_audit_data ad;
+        u32 sid = current_sid();
         u32 av;
         int old_is_dir, new_is_dir;
         int rc;
 
-        tsec = current->security;
         old_dsec = old_dir->i_security;
         old_isec = old_dentry->d_inode->i_security;
         old_is_dir = S_ISDIR(old_dentry->d_inode->i_mode);
@@ -1609,16 +1678,16 @@ static inline int may_rename(struct inode *old_dir,
         AVC_AUDIT_DATA_INIT(&ad, FS);
 
         ad.u.fs.path.dentry = old_dentry;
-        rc = avc_has_perm(tsec->sid, old_dsec->sid, SECCLASS_DIR,
+        rc = avc_has_perm(sid, old_dsec->sid, SECCLASS_DIR,
                           DIR__REMOVE_NAME | DIR__SEARCH, &ad);
         if (rc)
                 return rc;
-        rc = avc_has_perm(tsec->sid, old_isec->sid,
+        rc = avc_has_perm(sid, old_isec->sid,
                           old_isec->sclass, FILE__RENAME, &ad);
         if (rc)
                 return rc;
         if (old_is_dir && new_dir != old_dir) {
-                rc = avc_has_perm(tsec->sid, old_isec->sid,
+                rc = avc_has_perm(sid, old_isec->sid,
                                   old_isec->sclass, DIR__REPARENT, &ad);
                 if (rc)
                         return rc;
@@ -1628,13 +1697,13 @@ static inline int may_rename(struct inode *old_dir,
         av = DIR__ADD_NAME | DIR__SEARCH;
         if (new_dentry->d_inode)
                 av |= DIR__REMOVE_NAME;
-        rc = avc_has_perm(tsec->sid, new_dsec->sid, SECCLASS_DIR, av, &ad);
+        rc = avc_has_perm(sid, new_dsec->sid, SECCLASS_DIR, av, &ad);
         if (rc)
                 return rc;
         if (new_dentry->d_inode) {
                 new_isec = new_dentry->d_inode->i_security;
                 new_is_dir = S_ISDIR(new_dentry->d_inode->i_mode);
-                rc = avc_has_perm(tsec->sid, new_isec->sid,
+                rc = avc_has_perm(sid, new_isec->sid,
                                   new_isec->sclass,
                                   (new_is_dir ? DIR__RMDIR : FILE__UNLINK), &ad);
                 if (rc)
@@ -1645,18 +1714,16 @@ static inline int may_rename(struct inode *old_dir,
 }
 
 /* Check whether a task can perform a filesystem operation. */
-static int superblock_has_perm(struct task_struct *tsk,
+static int superblock_has_perm(const struct cred *cred,
                                struct super_block *sb,
                                u32 perms,
                                struct avc_audit_data *ad)
 {
-        struct task_security_struct *tsec;
         struct superblock_security_struct *sbsec;
+        u32 sid = cred_sid(cred);
 
-        tsec = tsk->security;
         sbsec = sb->s_security;
-        return avc_has_perm(tsec->sid, sbsec->sid, SECCLASS_FILESYSTEM,
-                            perms, ad);
+        return avc_has_perm(sid, sbsec->sid, SECCLASS_FILESYSTEM, perms, ad);
 }
 
 /* Convert a Linux mode and permission mask to an access vector. */
@@ -1687,15 +1754,39 @@ static inline u32 file_mask_to_av(int mode, int mask)
         return av;
 }
 
+/* Convert a Linux file to an access vector. */
+static inline u32 file_to_av(struct file *file)
+{
+        u32 av = 0;
+
+        if (file->f_mode & FMODE_READ)
+                av |= FILE__READ;
+        if (file->f_mode & FMODE_WRITE) {
+                if (file->f_flags & O_APPEND)
+                        av |= FILE__APPEND;
+                else
+                        av |= FILE__WRITE;
+        }
+        if (!av) {
+                /*
+                 * Special file opened with flags 3 for ioctl-only use.
+                 */
+                av = FILE__IOCTL;
+        }
+
+        return av;
+}
+
 /*
- * Convert a file mask to an access vector and include the correct open
+ * Convert a file to an access vector and include the correct open
  * open permission.
  */
-static inline u32 open_file_mask_to_av(int mode, int mask)
+static inline u32 open_file_to_av(struct file *file)
 {
-        u32 av = file_mask_to_av(mode, mask);
+        u32 av = file_to_av(file);
 
         if (selinux_policycap_openperm) {
+                mode_t mode = file->f_path.dentry->d_inode->i_mode;
                 /*
                  * lnk files and socks do not really have an 'open'
                  */
@@ -1711,34 +1802,11 @@ static inline u32 open_file_mask_to_av(int mode, int mask)
                         av |= DIR__OPEN;
                 else
                         printk(KERN_ERR "SELinux: WARNING: inside %s with "
-                                "unknown mode:%x\n", __func__, mode);
+                                "unknown mode:%o\n", __func__, mode);
         }
         return av;
 }
 
-/* Convert a Linux file to an access vector. */
-static inline u32 file_to_av(struct file *file)
-{
-        u32 av = 0;
-
-        if (file->f_mode & FMODE_READ)
-                av |= FILE__READ;
-        if (file->f_mode & FMODE_WRITE) {
-                if (file->f_flags & O_APPEND)
-                        av |= FILE__APPEND;
-                else
-                        av |= FILE__WRITE;
-        }
-        if (!av) {
-                /*
-                 * Special file opened with flags 3 for ioctl-only use.
-                 */
-                av = FILE__IOCTL;
-        }
-
-        return av;
-}
-
 /* Hook functions begin here. */
 
 static int selinux_ptrace_may_access(struct task_struct *child,
@@ -1751,13 +1819,12 @@ static int selinux_ptrace_may_access(struct task_struct *child,
                 return rc;
 
         if (mode == PTRACE_MODE_READ) {
-                struct task_security_struct *tsec = current->security;
-                struct task_security_struct *csec = child->security;
-                return avc_has_perm(tsec->sid, csec->sid,
-                                    SECCLASS_FILE, FILE__READ, NULL);
+                u32 sid = current_sid();
+                u32 csid = task_sid(child);
+                return avc_has_perm(sid, csid, SECCLASS_FILE, FILE__READ, NULL);
         }
 
-        return task_has_perm(current, child, PROCESS__PTRACE);
+        return current_has_perm(child, PROCESS__PTRACE);
 }
 
 static int selinux_ptrace_traceme(struct task_struct *parent)
@@ -1776,40 +1843,37 @@ static int selinux_capget(struct task_struct *target, kernel_cap_t *effective,
 {
         int error;
 
-        error = task_has_perm(current, target, PROCESS__GETCAP);
+        error = current_has_perm(target, PROCESS__GETCAP);
         if (error)
                 return error;
 
         return secondary_ops->capget(target, effective, inheritable, permitted);
 }
 
-static int selinux_capset_check(struct task_struct *target, kernel_cap_t *effective,
-                                kernel_cap_t *inheritable, kernel_cap_t *permitted)
+static int selinux_capset(struct cred *new, const struct cred *old,
+                          const kernel_cap_t *effective,
+                          const kernel_cap_t *inheritable,
+                          const kernel_cap_t *permitted)
 {
         int error;
 
-        error = secondary_ops->capset_check(target, effective, inheritable, permitted);
+        error = secondary_ops->capset(new, old,
+                                      effective, inheritable, permitted);
         if (error)
                 return error;
 
-        return task_has_perm(current, target, PROCESS__SETCAP);
+        return cred_has_perm(old, new, PROCESS__SETCAP);
 }
 
-static void selinux_capset_set(struct task_struct *target, kernel_cap_t *effective,
-                               kernel_cap_t *inheritable, kernel_cap_t *permitted)
-{
-        secondary_ops->capset_set(target, effective, inheritable, permitted);
-}
-
-static int selinux_capable(struct task_struct *tsk, int cap)
+static int selinux_capable(struct task_struct *tsk, int cap, int audit)
 {
         int rc;
 
-        rc = secondary_ops->capable(tsk, cap);
+        rc = secondary_ops->capable(tsk, cap, audit);
         if (rc)
                 return rc;
 
-        return task_has_capability(tsk, cap);
+        return task_has_capability(tsk, cap, audit);
 }
 
 static int selinux_sysctl_get_sid(ctl_table *table, u16 tclass, u32 *sid)
@@ -1857,15 +1921,14 @@ static int selinux_sysctl(ctl_table *table, int op)
 {
         int error = 0;
         u32 av;
-        struct task_security_struct *tsec;
-        u32 tsid;
+        u32 tsid, sid;
         int rc;
 
         rc = secondary_ops->sysctl(table, op);
         if (rc)
                 return rc;
 
-        tsec = current->security;
+        sid = current_sid();
 
         rc = selinux_sysctl_get_sid(table, (op == 0001) ?
                                     SECCLASS_DIR : SECCLASS_FILE, &tsid);
@@ -1877,7 +1940,7 @@ static int selinux_sysctl(ctl_table *table, int op)
         /* The op values are "defined" in sysctl.c, thereby creating
          * a bad coupling between this module and sysctl.c */
         if (op == 001) {
-                error = avc_has_perm(tsec->sid, tsid,
+                error = avc_has_perm(sid, tsid,
                                      SECCLASS_DIR, DIR__SEARCH, NULL);
         } else {
                 av = 0;
@@ -1886,7 +1949,7 @@ static int selinux_sysctl(ctl_table *table, int op)
                 if (op & 002)
                         av |= FILE__WRITE;
                 if (av)
-                        error = avc_has_perm(tsec->sid, tsid,
+                        error = avc_has_perm(sid, tsid,
                                              SECCLASS_FILE, av, NULL);
         }
 
@@ -1895,6 +1958,7 @@ static int selinux_sysctl(ctl_table *table, int op)
 
 static int selinux_quotactl(int cmds, int type, int id, struct super_block *sb)
 {
+        const struct cred *cred = current_cred();
         int rc = 0;
 
         if (!sb)
@@ -1906,14 +1970,12 @@ static int selinux_quotactl(int cmds, int type, int id, struct super_block *sb)
         case Q_QUOTAOFF:
         case Q_SETINFO:
         case Q_SETQUOTA:
-                rc = superblock_has_perm(current, sb, FILESYSTEM__QUOTAMOD,
-                                         NULL);
+                rc = superblock_has_perm(cred, sb, FILESYSTEM__QUOTAMOD, NULL);
                 break;
         case Q_GETFMT:
         case Q_GETINFO:
         case Q_GETQUOTA:
-                rc = superblock_has_perm(current, sb, FILESYSTEM__QUOTAGET,
-                                         NULL);
+                rc = superblock_has_perm(cred, sb, FILESYSTEM__QUOTAGET, NULL);
                 break;
         default:
                 rc = 0;  /* let the kernel handle invalid cmds */
@@ -1924,7 +1986,9 @@ static int selinux_quotactl(int cmds, int type, int id, struct super_block *sb)
 
 static int selinux_quota_on(struct dentry *dentry)
 {
-        return dentry_has_perm(current, NULL, dentry, FILE__QUOTAON);
+        const struct cred *cred = current_cred();
+
+        return dentry_has_perm(cred, NULL, dentry, FILE__QUOTAON);
 }
 
 static int selinux_syslog(int type)
@@ -1972,16 +2036,8 @@ static int selinux_syslog(int type)
 static int selinux_vm_enough_memory(struct mm_struct *mm, long pages)
 {
         int rc, cap_sys_admin = 0;
-        struct task_security_struct *tsec = current->security;
-
-        rc = secondary_ops->capable(current, CAP_SYS_ADMIN);
-        if (rc == 0)
-                rc = avc_has_perm_noaudit(tsec->sid, tsec->sid,
-                                          SECCLASS_CAPABILITY,
-                                          CAP_TO_MASK(CAP_SYS_ADMIN),
-                                          0,
-                                          NULL);
 
+        rc = selinux_capable(current, CAP_SYS_ADMIN, SECURITY_CAP_NOAUDIT);
         if (rc == 0)
                 cap_sys_admin = 1;
 
@@ -1990,59 +2046,45 @@ static int selinux_vm_enough_memory(struct mm_struct *mm, long pages)
 
 /* binprm security operations */
 
-static int selinux_bprm_alloc_security(struct linux_binprm *bprm)
-{
-        struct bprm_security_struct *bsec;
-
-        bsec = kzalloc(sizeof(struct bprm_security_struct), GFP_KERNEL);
-        if (!bsec)
-                return -ENOMEM;
-
-        bsec->sid = SECINITSID_UNLABELED;
-        bsec->set = 0;
-
-        bprm->security = bsec;
-        return 0;
-}
-
-static int selinux_bprm_set_security(struct linux_binprm *bprm)
+static int selinux_bprm_set_creds(struct linux_binprm *bprm)
 {
-        struct task_security_struct *tsec;
-        struct inode *inode = bprm->file->f_path.dentry->d_inode;
+        const struct task_security_struct *old_tsec;
+        struct task_security_struct *new_tsec;
         struct inode_security_struct *isec;
-        struct bprm_security_struct *bsec;
-        u32 newsid;
         struct avc_audit_data ad;
+        struct inode *inode = bprm->file->f_path.dentry->d_inode;
         int rc;
 
-        rc = secondary_ops->bprm_set_security(bprm);
+        rc = secondary_ops->bprm_set_creds(bprm);
         if (rc)
                 return rc;
 
-        bsec = bprm->security;
-
-        if (bsec->set)
+        /* SELinux context only depends on initial program or script and not
+         * the script interpreter */
+        if (bprm->cred_prepared)
                 return 0;
 
-        tsec = current->security;
+        old_tsec = current_security();
+        new_tsec = bprm->cred->security;
         isec = inode->i_security;
 
         /* Default to the current task SID. */
-        bsec->sid = tsec->sid;
+        new_tsec->sid = old_tsec->sid;
+        new_tsec->osid = old_tsec->sid;
 
         /* Reset fs, key, and sock SIDs on execve. */
-        tsec->create_sid = 0;
-        tsec->keycreate_sid = 0;
-        tsec->sockcreate_sid = 0;
+        new_tsec->create_sid = 0;
+        new_tsec->keycreate_sid = 0;
+        new_tsec->sockcreate_sid = 0;
 
-        if (tsec->exec_sid) {
-                newsid = tsec->exec_sid;
+        if (old_tsec->exec_sid) {
+                new_tsec->sid = old_tsec->exec_sid;
                 /* Reset exec SID on execve. */
-                tsec->exec_sid = 0;
+                new_tsec->exec_sid = 0;
         } else {
                 /* Check for a default transition on this program. */
-                rc = security_transition_sid(tsec->sid, isec->sid,
-                                             SECCLASS_PROCESS, &newsid);
+                rc = security_transition_sid(old_tsec->sid, isec->sid,
+                                             SECCLASS_PROCESS, &new_tsec->sid);
                 if (rc)
                         return rc;
         }
@@ -2051,33 +2093,63 @@ static int selinux_bprm_set_security(struct linux_binprm *bprm)
         ad.u.fs.path = bprm->file->f_path;
 
         if (bprm->file->f_path.mnt->mnt_flags & MNT_NOSUID)
-                newsid = tsec->sid;
+                new_tsec->sid = old_tsec->sid;
 
-        if (tsec->sid == newsid) {
-                rc = avc_has_perm(tsec->sid, isec->sid,
+        if (new_tsec->sid == old_tsec->sid) {
+                rc = avc_has_perm(old_tsec->sid, isec->sid,
                                   SECCLASS_FILE, FILE__EXECUTE_NO_TRANS, &ad);
                 if (rc)
                         return rc;
         } else {
                 /* Check permissions for the transition. */
-                rc = avc_has_perm(tsec->sid, newsid,
+                rc = avc_has_perm(old_tsec->sid, new_tsec->sid,
                                   SECCLASS_PROCESS, PROCESS__TRANSITION, &ad);
                 if (rc)
                         return rc;
 
-                rc = avc_has_perm(newsid, isec->sid,
+                rc = avc_has_perm(new_tsec->sid, isec->sid,
                                   SECCLASS_FILE, FILE__ENTRYPOINT, &ad);
                 if (rc)
                         return rc;
 
-                /* Clear any possibly unsafe personality bits on exec: */
-                current->personality &= ~PER_CLEAR_ON_SETID;
+                /* Check for shared state */
+                if (bprm->unsafe & LSM_UNSAFE_SHARE) {
+                        rc = avc_has_perm(old_tsec->sid, new_tsec->sid,
+                                          SECCLASS_PROCESS, PROCESS__SHARE,
+                                          NULL);
+                        if (rc)
+                                return -EPERM;
+                }
+
+                /* Make sure that anyone attempting to ptrace over a task that
+                 * changes its SID has the appropriate permit */
+                if (bprm->unsafe &
+                    (LSM_UNSAFE_PTRACE | LSM_UNSAFE_PTRACE_CAP)) {
+                        struct task_struct *tracer;
+                        struct task_security_struct *sec;
+                        u32 ptsid = 0;
 
-                /* Set the security field to the new SID. */
-                bsec->sid = newsid;
+                        rcu_read_lock();
+                        tracer = tracehook_tracer_task(current);
+                        if (likely(tracer != NULL)) {
+                                sec = __task_cred(tracer)->security;
+                                ptsid = sec->sid;
+                        }
+                        rcu_read_unlock();
+
+                        if (ptsid != 0) {
+                                rc = avc_has_perm(ptsid, new_tsec->sid,
+                                                  SECCLASS_PROCESS,
+                                                  PROCESS__PTRACE, NULL);
+                                if (rc)
+                                        return -EPERM;
+                        }
+                }
+
+                /* Clear any possibly unsafe personality bits on exec: */
+                bprm->per_clear |= PER_CLEAR_ON_SETID;
         }
 
-        bsec->set = 1;
         return 0;
 }
 
@@ -2086,35 +2158,34 @@ static int selinux_bprm_check_security(struct linux_binprm *bprm)
         return secondary_ops->bprm_check_security(bprm);
 }
 
-
 static int selinux_bprm_secureexec(struct linux_binprm *bprm)
 {
-        struct task_security_struct *tsec = current->security;
+        const struct cred *cred = current_cred();
+        const struct task_security_struct *tsec = cred->security;
+        u32 sid, osid;
         int atsecure = 0;
 
-        if (tsec->osid != tsec->sid) {
+        sid = tsec->sid;
+        osid = tsec->osid;
+
+        if (osid != sid) {
                 /* Enable secure mode for SIDs transitions unless
                    the noatsecure permission is granted between
                    the two SIDs, i.e. ahp returns 0. */
-                atsecure = avc_has_perm(tsec->osid, tsec->sid,
-                                         SECCLASS_PROCESS,
-                                         PROCESS__NOATSECURE, NULL);
+                atsecure = avc_has_perm(osid, sid,
+                                        SECCLASS_PROCESS,
+                                        PROCESS__NOATSECURE, NULL);
         }
 
         return (atsecure || secondary_ops->bprm_secureexec(bprm));
 }
 
-static void selinux_bprm_free_security(struct linux_binprm *bprm)
-{
-        kfree(bprm->security);
-        bprm->security = NULL;
-}
-
 extern struct vfsmount *selinuxfs_mount;
 extern struct dentry *selinux_null;
 
 /* Derived from fs/exec.c:flush_old_files. */
-static inline void flush_unauthorized_files(struct files_struct *files)
+static inline void flush_unauthorized_files(const struct cred *cred,
+                                            struct files_struct *files)
 {
         struct avc_audit_data ad;
         struct file *file, *devnull = NULL;
@@ -2136,7 +2207,7 @@ static inline void flush_unauthorized_files(struct files_struct *files)
                            interested in the inode-based check here. */
                         file = list_first_entry(&tty->tty_files, struct file, f_u.fu_list);
                         inode = file->f_path.dentry->d_inode;
-                        if (inode_has_perm(current, inode,
+                        if (inode_has_perm(cred, inode,
                                            FILE__READ | FILE__WRITE, NULL)) {
                                 drop_tty = 1;
                         }
@@ -2171,7 +2242,7 @@ static inline void flush_unauthorized_files(struct files_struct *files)
                                 file = fget(i);
                                 if (!file)
                                         continue;
-                                if (file_has_perm(current,
+                                if (file_has_perm(cred,
                                                   file,
                                                   file_to_av(file))) {
                                         sys_close(i);
@@ -2185,7 +2256,10 @@ static inline void flush_unauthorized_files(struct files_struct *files)
                                         if (devnull) {
                                                 get_file(devnull);
                                         } else {
-                                                devnull = dentry_open(dget(selinux_null), mntget(selinuxfs_mount), O_RDWR);
+                                                devnull = dentry_open(
+                                                        dget(selinux_null),
+                                                        mntget(selinuxfs_mount),
+                                                        O_RDWR, cred);
                                                 if (IS_ERR(devnull)) {
                                                         devnull = NULL;
                                                         put_unused_fd(fd);
@@ -2204,94 +2278,78 @@ static inline void flush_unauthorized_files(struct files_struct *files)
         spin_unlock(&files->file_lock);
 }
 
-static void selinux_bprm_apply_creds(struct linux_binprm *bprm, int unsafe)
+/*
+ * Prepare a process for imminent new credential changes due to exec
+ */
+static void selinux_bprm_committing_creds(struct linux_binprm *bprm)
 {
-        struct task_security_struct *tsec;
-        struct bprm_security_struct *bsec;
-        u32 sid;
-        int rc;
-
-        secondary_ops->bprm_apply_creds(bprm, unsafe);
-
-        tsec = current->security;
+        struct task_security_struct *new_tsec;
+        struct rlimit *rlim, *initrlim;
+        int rc, i;
 
-        bsec = bprm->security;
-        sid = bsec->sid;
+        secondary_ops->bprm_committing_creds(bprm);
 
-        tsec->osid = tsec->sid;
-        bsec->unsafe = 0;
-        if (tsec->sid != sid) {
-                /* Check for shared state.  If not ok, leave SID
-                   unchanged and kill. */
-                if (unsafe & LSM_UNSAFE_SHARE) {
-                        rc = avc_has_perm(tsec->sid, sid, SECCLASS_PROCESS,
-                                        PROCESS__SHARE, NULL);
-                        if (rc) {
-                                bsec->unsafe = 1;
-                                return;
-                        }
-                }
+        new_tsec = bprm->cred->security;
+        if (new_tsec->sid == new_tsec->osid)
+                return;
 
-                /* Check for ptracing, and update the task SID if ok.
-                   Otherwise, leave SID unchanged and kill. */
-                if (unsafe & (LSM_UNSAFE_PTRACE | LSM_UNSAFE_PTRACE_CAP)) {
-                        struct task_struct *tracer;
-                        struct task_security_struct *sec;
-                        u32 ptsid = 0;
+        /* Close files for which the new task SID is not authorized. */
+        flush_unauthorized_files(bprm->cred, current->files);
 
-                        rcu_read_lock();
-                        tracer = tracehook_tracer_task(current);
-                        if (likely(tracer != NULL)) {
-                                sec = tracer->security;
-                                ptsid = sec->sid;
-                        }
-                        rcu_read_unlock();
+        /* Always clear parent death signal on SID transitions. */
+        current->pdeath_signal = 0;
 
-                        if (ptsid != 0) {
-                                rc = avc_has_perm(ptsid, sid, SECCLASS_PROCESS,
-                                                  PROCESS__PTRACE, NULL);
-                                if (rc) {
-                                        bsec->unsafe = 1;
-                                        return;
-                                }
-                        }
+        /* Check whether the new SID can inherit resource limits from the old
+         * SID.  If not, reset all soft limits to the lower of the current
+         * task's hard limit and the init task's soft limit.
+         *
+         * Note that the setting of hard limits (even to lower them) can be
+         * controlled by the setrlimit check.  The inclusion of the init task's
+         * soft limit into the computation is to avoid resetting soft limits
+         * higher than the default soft limit for cases where the default is
+         * lower than the hard limit, e.g. RLIMIT_CORE or RLIMIT_STACK.
+         */
+        rc = avc_has_perm(new_tsec->osid, new_tsec->sid, SECCLASS_PROCESS,
+                          PROCESS__RLIMITINH, NULL);
+        if (rc) {
+                for (i = 0; i < RLIM_NLIMITS; i++) {
+                        rlim = current->signal->rlim + i;
+                        initrlim = init_task.signal->rlim + i;
+                        rlim->rlim_cur = min(rlim->rlim_max, initrlim->rlim_cur);
                 }
-                tsec->sid = sid;
+                update_rlimit_cpu(rlim->rlim_cur);
         }
 }
 
 /*
- * called after apply_creds without the task lock held
+ * Clean up the process immediately after the installation of new credentials
+ * due to exec
  */
-static void selinux_bprm_post_apply_creds(struct linux_binprm *bprm)
+static void selinux_bprm_committed_creds(struct linux_binprm *bprm)
 {
-        struct task_security_struct *tsec;
-        struct rlimit *rlim, *initrlim;
+        const struct task_security_struct *tsec = current_security();
         struct itimerval itimer;
-        struct bprm_security_struct *bsec;
+        struct sighand_struct *psig;
+        u32 osid, sid;
         int rc, i;
+        unsigned long flags;
 
-        tsec = current->security;
-        bsec = bprm->security;
+        secondary_ops->bprm_committed_creds(bprm);
 
-        if (bsec->unsafe) {
-                force_sig_specific(SIGKILL, current);
-                return;
-        }
-        if (tsec->osid == tsec->sid)
+        osid = tsec->osid;
+        sid = tsec->sid;
+
+        if (sid == osid)
                 return;
 
-        /* Close files for which the new task SID is not authorized. */
-        flush_unauthorized_files(current->files);
-
-        /* Check whether the new SID can inherit signal state
-           from the old SID.  If not, clear itimers to avoid
-           subsequent signal generation and flush and unblock
-           signals. This must occur _after_ the task SID has
-          been updated so that any kill done after the flush
-          will be checked against the new SID. */
-        rc = avc_has_perm(tsec->osid, tsec->sid, SECCLASS_PROCESS,
-                          PROCESS__SIGINH, NULL);
+        /* Check whether the new SID can inherit signal state from the old SID.
+         * If not, clear itimers to avoid subsequent signal generation and
+         * flush and unblock signals.
+         *
+         * This must occur _after_ the task SID has been updated so that any
+         * kill done after the flush will be checked against the new SID.
+         */
+        rc = avc_has_perm(osid, sid, SECCLASS_PROCESS, PROCESS__SIGINH, NULL);
         if (rc) {
                 memset(&itimer, 0, sizeof itimer);
                 for (i = 0; i < 3; i++)
@@ -2304,33 +2362,14 @@ static void selinux_bprm_post_apply_creds(struct linux_binprm *bprm)
                 spin_unlock_irq(&current->sighand->siglock);
         }
 
-        /* Always clear parent death signal on SID transitions. */
-        current->pdeath_signal = 0;
-
-        /* Check whether the new SID can inherit resource limits
-           from the old SID.  If not, reset all soft limits to
-           the lower of the current task's hard limit and the init
-           task's soft limit.  Note that the setting of hard limits
-           (even to lower them) can be controlled by the setrlimit
-           check. The inclusion of the init task's soft limit into
-           the computation is to avoid resetting soft limits higher
-           than the default soft limit for cases where the default
-           is lower than the hard limit, e.g. RLIMIT_CORE or
-           RLIMIT_STACK.*/
-        rc = avc_has_perm(tsec->osid, tsec->sid, SECCLASS_PROCESS,
-                          PROCESS__RLIMITINH, NULL);
-        if (rc) {
-                for (i = 0; i < RLIM_NLIMITS; i++) {
-                        rlim = current->signal->rlim + i;
-                        initrlim = init_task.signal->rlim+i;
-                        rlim->rlim_cur = min(rlim->rlim_max, initrlim->rlim_cur);
-                }
-                update_rlimit_cpu(rlim->rlim_cur);
-        }
-
-        /* Wake up the parent if it is waiting so that it can
-           recheck wait permission to the new task SID. */
+        /* Wake up the parent if it is waiting so that it can recheck
+         * wait permission to the new task SID. */
+        read_lock_irq(&tasklist_lock);
+        psig = current->parent->sighand;
+        spin_lock_irqsave(&psig->siglock, flags);
         wake_up_interruptible(&current->parent->signal->wait_chldexit);
+        spin_unlock_irqrestore(&psig->siglock, flags);
+        read_unlock_irq(&tasklist_lock);
 }
 
 /* superblock security operations */
@@ -2435,8 +2474,9 @@ out:
         return rc;
 }
 
-static int selinux_sb_kern_mount(struct super_block *sb, void *data)
+static int selinux_sb_kern_mount(struct super_block *sb, int flags, void *data)
 {
+        const struct cred *cred = current_cred();
         struct avc_audit_data ad;
         int rc;
 
@@ -2444,18 +2484,23 @@ static int selinux_sb_kern_mount(struct super_block *sb, void *data)
         if (rc)
                 return rc;
 
+        /* Allow all mounts performed by the kernel */
+        if (flags & MS_KERNMOUNT)
+                return 0;
+
         AVC_AUDIT_DATA_INIT(&ad, FS);
         ad.u.fs.path.dentry = sb->s_root;
-        return superblock_has_perm(current, sb, FILESYSTEM__MOUNT, &ad);
+        return superblock_has_perm(cred, sb, FILESYSTEM__MOUNT, &ad);
 }
 
 static int selinux_sb_statfs(struct dentry *dentry)
 {
+        const struct cred *cred = current_cred();
         struct avc_audit_data ad;
 
         AVC_AUDIT_DATA_INIT(&ad, FS);
         ad.u.fs.path.dentry = dentry->d_sb->s_root;
-        return superblock_has_perm(current, dentry->d_sb, FILESYSTEM__GETATTR, &ad);
+        return superblock_has_perm(cred, dentry->d_sb, FILESYSTEM__GETATTR, &ad);
 }
 
 static int selinux_mount(char *dev_name,
@@ -2464,6 +2509,7 @@ static int selinux_mount(char *dev_name,
                          unsigned long flags,
                          void *data)
 {
+        const struct cred *cred = current_cred();
         int rc;
 
         rc = secondary_ops->sb_mount(dev_name, path, type, flags, data);
@@ -2471,22 +2517,23 @@ static int selinux_mount(char *dev_name,
                 return rc;
 
         if (flags & MS_REMOUNT)
-                return superblock_has_perm(current, path->mnt->mnt_sb,
+                return superblock_has_perm(cred, path->mnt->mnt_sb,
                                            FILESYSTEM__REMOUNT, NULL);
         else
-                return dentry_has_perm(current, path->mnt, path->dentry,
+                return dentry_has_perm(cred, path->mnt, path->dentry,
                                        FILE__MOUNTON);
 }
 
 static int selinux_umount(struct vfsmount *mnt, int flags)
 {
+        const struct cred *cred = current_cred();
         int rc;
 
         rc = secondary_ops->sb_umount(mnt, flags);
         if (rc)
                 return rc;
 
-        return superblock_has_perm(current, mnt->mnt_sb,
+        return superblock_has_perm(cred, mnt->mnt_sb,
                                    FILESYSTEM__UNMOUNT, NULL);
 }
 
@@ -2506,21 +2553,22 @@ static int selinux_inode_init_security(struct inode *inode, struct inode *dir,
                                        char **name, void **value,
                                        size_t *len)
 {
-        struct task_security_struct *tsec;
+        const struct cred *cred = current_cred();
+        const struct task_security_struct *tsec = cred->security;
         struct inode_security_struct *dsec;
         struct superblock_security_struct *sbsec;
-        u32 newsid, clen;
+        u32 sid, newsid, clen;
         int rc;
         char *namep = NULL, *context;
 
-        tsec = current->security;
         dsec = dir->i_security;
         sbsec = dir->i_sb->s_security;
 
-        if (tsec->create_sid && sbsec->behavior != SECURITY_FS_USE_MNTPOINT) {
-                newsid = tsec->create_sid;
-        } else {
-                rc = security_transition_sid(tsec->sid, dsec->sid,
+        sid = tsec->sid;
+        newsid = tsec->create_sid;
+
+        if (!newsid || sbsec->behavior == SECURITY_FS_USE_MNTPOINT) {
+                rc = security_transition_sid(sid, dsec->sid,
                                              inode_mode_to_security_class(inode->i_mode),
                                              &newsid);
                 if (rc) {
@@ -2623,21 +2671,25 @@ static int selinux_inode_rename(struct inode *old_inode, struct dentry *old_dent
 
 static int selinux_inode_readlink(struct dentry *dentry)
 {
-        return dentry_has_perm(current, NULL, dentry, FILE__READ);
+        const struct cred *cred = current_cred();
+
+        return dentry_has_perm(cred, NULL, dentry, FILE__READ);
 }
 
 static int selinux_inode_follow_link(struct dentry *dentry, struct nameidata *nameidata)
 {
+        const struct cred *cred = current_cred();
         int rc;
 
         rc = secondary_ops->inode_follow_link(dentry, nameidata);
         if (rc)
                 return rc;
-        return dentry_has_perm(current, NULL, dentry, FILE__READ);
+        return dentry_has_perm(cred, NULL, dentry, FILE__READ);
 }
 
 static int selinux_inode_permission(struct inode *inode, int mask)
 {
+        const struct cred *cred = current_cred();
         int rc;
 
         rc = secondary_ops->inode_permission(inode, mask);
@@ -2649,12 +2701,13 @@ static int selinux_inode_permission(struct inode *inode, int mask)
                 return 0;
         }
 
-        return inode_has_perm(current, inode,
-                               open_file_mask_to_av(inode->i_mode, mask), NULL);
+        return inode_has_perm(cred, inode,
+                              file_mask_to_av(inode->i_mode, mask), NULL);
 }
 
 static int selinux_inode_setattr(struct dentry *dentry, struct iattr *iattr)
 {
+        const struct cred *cred = current_cred();
         int rc;
 
         rc = secondary_ops->inode_setattr(dentry, iattr);
@@ -2666,18 +2719,22 @@ static int selinux_inode_setattr(struct dentry *dentry, struct iattr *iattr)
 
         if (iattr->ia_valid & (ATTR_MODE | ATTR_UID | ATTR_GID |
                                ATTR_ATIME_SET | ATTR_MTIME_SET))
-                return dentry_has_perm(current, NULL, dentry, FILE__SETATTR);
+                return dentry_has_perm(cred, NULL, dentry, FILE__SETATTR);
 
-        return dentry_has_perm(current, NULL, dentry, FILE__WRITE);
+        return dentry_has_perm(cred, NULL, dentry, FILE__WRITE);
 }
 
 static int selinux_inode_getattr(struct vfsmount *mnt, struct dentry *dentry)
 {
-        return dentry_has_perm(current, mnt, dentry, FILE__GETATTR);
+        const struct cred *cred = current_cred();
+
+        return dentry_has_perm(cred, mnt, dentry, FILE__GETATTR);
 }
 
 static int selinux_inode_setotherxattr(struct dentry *dentry, const char *name)
 {
+        const struct cred *cred = current_cred();
+
         if (!strncmp(name, XATTR_SECURITY_PREFIX,
                      sizeof XATTR_SECURITY_PREFIX - 1)) {
                 if (!strcmp(name, XATTR_NAME_CAPS)) {
@@ -2692,18 +2749,17 @@ static int selinux_inode_setotherxattr(struct dentry *dentry, const char *name)
 
         /* Not an attribute we recognize, so just check the
            ordinary setattr permission. */
-        return dentry_has_perm(current, NULL, dentry, FILE__SETATTR);
+        return dentry_has_perm(cred, NULL, dentry, FILE__SETATTR);
 }
 
 static int selinux_inode_setxattr(struct dentry *dentry, const char *name,
                                   const void *value, size_t size, int flags)
 {
-        struct task_security_struct *tsec = current->security;
         struct inode *inode = dentry->d_inode;
         struct inode_security_struct *isec = inode->i_security;
         struct superblock_security_struct *sbsec;
         struct avc_audit_data ad;
-        u32 newsid;
+        u32 newsid, sid = current_sid();
         int rc = 0;
 
         if (strcmp(name, XATTR_NAME_SELINUX))
@@ -2719,7 +2775,7 @@ static int selinux_inode_setxattr(struct dentry *dentry, const char *name,
         AVC_AUDIT_DATA_INIT(&ad, FS);
         ad.u.fs.path.dentry = dentry;
 
-        rc = avc_has_perm(tsec->sid, isec->sid, isec->sclass,
+        rc = avc_has_perm(sid, isec->sid, isec->sclass,
                           FILE__RELABELFROM, &ad);
         if (rc)
                 return rc;
@@ -2733,12 +2789,12 @@ static int selinux_inode_setxattr(struct dentry *dentry, const char *name,
         if (rc)
                 return rc;
 
-        rc = avc_has_perm(tsec->sid, newsid, isec->sclass,
+        rc = avc_has_perm(sid, newsid, isec->sclass,
                           FILE__RELABELTO, &ad);
         if (rc)
                 return rc;
 
-        rc = security_validate_transition(isec->sid, newsid, tsec->sid,
+        rc = security_validate_transition(isec->sid, newsid, sid,
                                           isec->sclass);
         if (rc)
                 return rc;
@@ -2778,12 +2834,16 @@ static void selinux_inode_post_setxattr(struct dentry *dentry, const char *name,
 
 static int selinux_inode_getxattr(struct dentry *dentry, const char *name)
 {
-        return dentry_has_perm(current, NULL, dentry, FILE__GETATTR);
+        const struct cred *cred = current_cred();
+
+        return dentry_has_perm(cred, NULL, dentry, FILE__GETATTR);
 }
 
 static int selinux_inode_listxattr(struct dentry *dentry)
 {
-        return dentry_has_perm(current, NULL, dentry, FILE__GETATTR);
+        const struct cred *cred = current_cred();
+
+        return dentry_has_perm(cred, NULL, dentry, FILE__GETATTR);
 }
 
 static int selinux_inode_removexattr(struct dentry *dentry, const char *name)
@@ -2806,7 +2866,6 @@ static int selinux_inode_getsecurity(const struct inode *inode, const char *name
         u32 size;
         int error;
         char *context = NULL;
-        struct task_security_struct *tsec = current->security;
         struct inode_security_struct *isec = inode->i_security;
 
         if (strcmp(name, XATTR_SELINUX_SUFFIX))
@@ -2821,13 +2880,7 @@ static int selinux_inode_getsecurity(const struct inode *inode, const char *name
          * and lack of permission just means that we fall back to the
          * in-core context value, not a denial.
          */
-        error = secondary_ops->capable(current, CAP_MAC_ADMIN);
-        if (!error)
-                error = avc_has_perm_noaudit(tsec->sid, tsec->sid,
-                                             SECCLASS_CAPABILITY2,
-                                             CAPABILITY2__MAC_ADMIN,
-                                             0,
-                                             NULL);
+        error = selinux_capable(current, CAP_MAC_ADMIN, SECURITY_CAP_NOAUDIT);
         if (!error)
                 error = security_sid_to_context_force(isec->sid, &context,
                                                       &size);
@@ -2894,6 +2947,7 @@ static void selinux_inode_getsecid(const struct inode *inode, u32 *secid)
 
 static int selinux_revalidate_file_permission(struct file *file, int mask)
 {
+        const struct cred *cred = current_cred();
         int rc;
         struct inode *inode = file->f_path.dentry->d_inode;
 
@@ -2906,7 +2960,7 @@ static int selinux_revalidate_file_permission(struct file *file, int mask)
         if ((file->f_flags & O_APPEND) && (mask & MAY_WRITE))
                 mask |= MAY_APPEND;
 
-        rc = file_has_perm(current, file,
+        rc = file_has_perm(cred, file,
                            file_mask_to_av(inode->i_mode, mask));
         if (rc)
                 return rc;
@@ -2917,16 +2971,16 @@ static int selinux_revalidate_file_permission(struct file *file, int mask)
 static int selinux_file_permission(struct file *file, int mask)
 {
         struct inode *inode = file->f_path.dentry->d_inode;
-        struct task_security_struct *tsec = current->security;
         struct file_security_struct *fsec = file->f_security;
         struct inode_security_struct *isec = inode->i_security;
+        u32 sid = current_sid();
 
         if (!mask) {
                 /* No permission to check.  Existence test. */
                 return 0;
         }
 
-        if (tsec->sid == fsec->sid && fsec->isid == isec->sid
+        if (sid == fsec->sid && fsec->isid == isec->sid
             && fsec->pseqno == avc_policy_seqno())
                 return selinux_netlbl_inode_permission(inode, mask);
 
@@ -2946,6 +3000,7 @@ static void selinux_file_free_security(struct file *file)
 static int selinux_file_ioctl(struct file *file, unsigned int cmd,
                               unsigned long arg)
 {
+        const struct cred *cred = current_cred();
         u32 av = 0;
 
         if (_IOC_DIR(cmd) & _IOC_WRITE)
@@ -2955,11 +3010,14 @@ static int selinux_file_ioctl(struct file *file, unsigned int cmd,
         if (!av)
                 av = FILE__IOCTL;
 
-        return file_has_perm(current, file, av);
+        return file_has_perm(cred, file, av);
 }
 
 static int file_map_prot_check(struct file *file, unsigned long prot, int shared)
 {
+        const struct cred *cred = current_cred();
+        int rc = 0;
+
 #ifndef CONFIG_PPC32
         if ((prot & PROT_EXEC) && (!file || (!shared && (prot & PROT_WRITE)))) {
                 /*
@@ -2967,9 +3025,9 @@ static int file_map_prot_check(struct file *file, unsigned long prot, int shared
                  * private file mapping that will also be writable.
                  * This has an additional check.
                  */
-                int rc = task_has_perm(current, current, PROCESS__EXECMEM);
+                rc = cred_has_perm(cred, cred, PROCESS__EXECMEM);
                 if (rc)
-                        return rc;
+                        goto error;
         }
 #endif
 
@@ -2984,9 +3042,11 @@ static int file_map_prot_check(struct file *file, unsigned long prot, int shared
                 if (prot & PROT_EXEC)
                         av |= FILE__EXECUTE;
 
-                return file_has_perm(current, file, av);
+                return file_has_perm(cred, file, av);
         }
-        return 0;
+
+error:
+        return rc;
 }
 
 static int selinux_file_mmap(struct file *file, unsigned long reqprot,
@@ -2994,7 +3054,7 @@ static int selinux_file_mmap(struct file *file, unsigned long reqprot,
                              unsigned long addr, unsigned long addr_only)
 {
         int rc = 0;
-        u32 sid = ((struct task_security_struct *)(current->security))->sid;
+        u32 sid = current_sid();
 
         if (addr < mmap_min_addr)
                 rc = avc_has_perm(sid, sid, SECCLASS_MEMPROTECT,
@@ -3013,6 +3073,7 @@ static int selinux_file_mprotect(struct vm_area_struct *vma,
                                  unsigned long reqprot,
                                  unsigned long prot)
 {
+        const struct cred *cred = current_cred();
         int rc;
 
         rc = secondary_ops->file_mprotect(vma, reqprot, prot);
@@ -3027,12 +3088,11 @@ static int selinux_file_mprotect(struct vm_area_struct *vma,
                 rc = 0;
                 if (vma->vm_start >= vma->vm_mm->start_brk &&
                     vma->vm_end <= vma->vm_mm->brk) {
-                        rc = task_has_perm(current, current,
-                                           PROCESS__EXECHEAP);
+                        rc = cred_has_perm(cred, cred, PROCESS__EXECHEAP);
                 } else if (!vma->vm_file &&
                            vma->vm_start <= vma->vm_mm->start_stack &&
                            vma->vm_end >= vma->vm_mm->start_stack) {
-                        rc = task_has_perm(current, current, PROCESS__EXECSTACK);
+                        rc = current_has_perm(current, PROCESS__EXECSTACK);
                 } else if (vma->vm_file && vma->anon_vma) {
                         /*
                          * We are making executable a file mapping that has
@@ -3041,8 +3101,7 @@ static int selinux_file_mprotect(struct vm_area_struct *vma,
                          * modified content.  This typically should only
                          * occur for text relocations.
                          */
-                        rc = file_has_perm(current, vma->vm_file,
-                                           FILE__EXECMOD);
+                        rc = file_has_perm(cred, vma->vm_file, FILE__EXECMOD);
                 }
                 if (rc)
                         return rc;
@@ -3054,12 +3113,15 @@ static int selinux_file_mprotect(struct vm_area_struct *vma,
 
 static int selinux_file_lock(struct file *file, unsigned int cmd)
 {
-        return file_has_perm(current, file, FILE__LOCK);
+        const struct cred *cred = current_cred();
+
+        return file_has_perm(cred, file, FILE__LOCK);
 }
 
 static int selinux_file_fcntl(struct file *file, unsigned int cmd,
                               unsigned long arg)
 {
+        const struct cred *cred = current_cred();
         int err = 0;
 
         switch (cmd) {
@@ -3070,7 +3132,7 @@ static int selinux_file_fcntl(struct file *file, unsigned int cmd,
                 }
 
                 if ((file->f_flags & O_APPEND) && !(arg & O_APPEND)) {
-                        err = file_has_perm(current, file, FILE__WRITE);
+                        err = file_has_perm(cred, file, FILE__WRITE);
                         break;
                 }
                 /* fall through */
@@ -3080,7 +3142,7 @@ static int selinux_file_fcntl(struct file *file, unsigned int cmd,
         case F_GETOWN:
         case F_GETSIG:
                 /* Just check FD__USE permission */
-                err = file_has_perm(current, file, 0);
+                err = file_has_perm(cred, file, 0);
                 break;
         case F_GETLK:
         case F_SETLK:
@@ -3094,7 +3156,7 @@ static int selinux_file_fcntl(struct file *file, unsigned int cmd,
                         err = -EINVAL;
                         break;
                 }
-                err = file_has_perm(current, file, FILE__LOCK);
+                err = file_has_perm(cred, file, FILE__LOCK);
                 break;
         }
 
@@ -3103,12 +3165,10 @@ static int selinux_file_fcntl(struct file *file, unsigned int cmd,
 
 static int selinux_file_set_fowner(struct file *file)
 {
-        struct task_security_struct *tsec;
         struct file_security_struct *fsec;
 
-        tsec = current->security;
         fsec = file->f_security;
-        fsec->fown_sid = tsec->sid;
+        fsec->fown_sid = current_sid();
 
         return 0;
 }
@@ -3117,14 +3177,13 @@ static int selinux_file_send_sigiotask(struct task_struct *tsk,
                                        struct fown_struct *fown, int signum)
 {
         struct file *file;
+        u32 sid = current_sid();
         u32 perm;
-        struct task_security_struct *tsec;
         struct file_security_struct *fsec;
 
         /* struct fown_struct is never outside the context of a struct file */
         file = container_of(fown, struct file, f_owner);
 
-        tsec = tsk->security;
         fsec = file->f_security;
 
         if (!signum)
@@ -3132,20 +3191,23 @@ static int selinux_file_send_sigiotask(struct task_struct *tsk,
         else
                 perm = signal_to_av(signum);
 
-        return avc_has_perm(fsec->fown_sid, tsec->sid,
+        return avc_has_perm(fsec->fown_sid, sid,
                             SECCLASS_PROCESS, perm, NULL);
 }
 
 static int selinux_file_receive(struct file *file)
 {
-        return file_has_perm(current, file, file_to_av(file));
+        const struct cred *cred = current_cred();
+
+        return file_has_perm(cred, file, file_to_av(file));
 }
 
-static int selinux_dentry_open(struct file *file)
+static int selinux_dentry_open(struct file *file, const struct cred *cred)
 {
         struct file_security_struct *fsec;
         struct inode *inode;
         struct inode_security_struct *isec;
+
         inode = file->f_path.dentry->d_inode;
         fsec = file->f_security;
         isec = inode->i_security;
@@ -3166,7 +3228,7 @@ static int selinux_dentry_open(struct file *file)
          * new inode label or new policy.
          * This check is not redundant - do not remove.
          */
-        return inode_has_perm(current, inode, file_to_av(file), NULL);
+        return inode_has_perm(cred, inode, open_file_to_av(file), NULL);
 }
 
 /* task security operations */
@@ -3179,36 +3241,88 @@ static int selinux_task_create(unsigned long clone_flags)
         if (rc)
                 return rc;
 
-        return task_has_perm(current, current, PROCESS__FORK);
+        return current_has_perm(current, PROCESS__FORK);
 }
 
-static int selinux_task_alloc_security(struct task_struct *tsk)
+/*
+ * detach and free the LSM part of a set of credentials
+ */
+static void selinux_cred_free(struct cred *cred)
 {
-        struct task_security_struct *tsec1, *tsec2;
-        int rc;
-
-        tsec1 = current->security;
+        struct task_security_struct *tsec = cred->security;
+        cred->security = NULL;
+        kfree(tsec);
+}
 
-        rc = task_alloc_security(tsk);
-        if (rc)
-                return rc;
-        tsec2 = tsk->security;
+/*
+ * prepare a new set of credentials for modification
+ */
+static int selinux_cred_prepare(struct cred *new, const struct cred *old,
+                                gfp_t gfp)
+{
+        const struct task_security_struct *old_tsec;
+        struct task_security_struct *tsec;
 
-        tsec2->osid = tsec1->osid;
-        tsec2->sid = tsec1->sid;
+        old_tsec = old->security;
 
-        /* Retain the exec, fs, key, and sock SIDs across fork */
-        tsec2->exec_sid = tsec1->exec_sid;
-        tsec2->create_sid = tsec1->create_sid;
-        tsec2->keycreate_sid = tsec1->keycreate_sid;
-        tsec2->sockcreate_sid = tsec1->sockcreate_sid;
+        tsec = kmemdup(old_tsec, sizeof(struct task_security_struct), gfp);
+        if (!tsec)
+                return -ENOMEM;
 
+        new->security = tsec;
         return 0;
 }
 
-static void selinux_task_free_security(struct task_struct *tsk)
+/*
+ * commit new credentials
+ */
+static void selinux_cred_commit(struct cred *new, const struct cred *old)
+{
+        secondary_ops->cred_commit(new, old);
+}
+
+/*
+ * set the security data for a kernel service
+ * - all the creation contexts are set to unlabelled
+ */
+static int selinux_kernel_act_as(struct cred *new, u32 secid)
+{
+        struct task_security_struct *tsec = new->security;
+        u32 sid = current_sid();
+        int ret;
+
+        ret = avc_has_perm(sid, secid,
+                           SECCLASS_KERNEL_SERVICE,
+                           KERNEL_SERVICE__USE_AS_OVERRIDE,
+                           NULL);
+        if (ret == 0) {
+                tsec->sid = secid;
+                tsec->create_sid = 0;
+                tsec->keycreate_sid = 0;
+                tsec->sockcreate_sid = 0;
+        }
+        return ret;
+}
+
+/*
+ * set the file creation context in a security record to the same as the
+ * objective context of the specified inode
+ */
+static int selinux_kernel_create_files_as(struct cred *new, struct inode *inode)
 {
-        task_free_security(tsk);
+        struct inode_security_struct *isec = inode->i_security;
+        struct task_security_struct *tsec = new->security;
+        u32 sid = current_sid();
+        int ret;
+
+        ret = avc_has_perm(sid, isec->sid,
+                           SECCLASS_KERNEL_SERVICE,
+                           KERNEL_SERVICE__CREATE_FILES_AS,
+                           NULL);
+
+        if (ret == 0)
+                tsec->create_sid = isec->sid;
+        return 0;
 }
 
 static int selinux_task_setuid(uid_t id0, uid_t id1, uid_t id2, int flags)
@@ -3222,9 +3336,10 @@ static int selinux_task_setuid(uid_t id0, uid_t id1, uid_t id2, int flags)
         return 0;
 }
 
-static int selinux_task_post_setuid(uid_t id0, uid_t id1, uid_t id2, int flags)
+static int selinux_task_fix_setuid(struct cred *new, const struct cred *old,
+                                   int flags)
 {
-        return secondary_ops->task_post_setuid(id0, id1, id2, flags);
+        return secondary_ops->task_fix_setuid(new, old, flags);
 }
 
 static int selinux_task_setgid(gid_t id0, gid_t id1, gid_t id2, int flags)
@@ -3235,23 +3350,22 @@ static int selinux_task_setgid(gid_t id0, gid_t id1, gid_t id2, int flags)
 
 static int selinux_task_setpgid(struct task_struct *p, pid_t pgid)
 {
-        return task_has_perm(current, p, PROCESS__SETPGID);
+        return current_has_perm(p, PROCESS__SETPGID);
 }
 
 static int selinux_task_getpgid(struct task_struct *p)
 {
-        return task_has_perm(current, p, PROCESS__GETPGID);
+        return current_has_perm(p, PROCESS__GETPGID);
 }
 
 static int selinux_task_getsid(struct task_struct *p)
 {
-        return task_has_perm(current, p, PROCESS__GETSESSION);
+        return current_has_perm(p, PROCESS__GETSESSION);
 }
 
 static void selinux_task_getsecid(struct task_struct *p, u32 *secid)
 {
-        struct task_security_struct *tsec = p->security;
-        *secid = tsec->sid;
+        *secid = task_sid(p);
 }
 
 static int selinux_task_setgroups(struct group_info *group_info)
@@ -3268,7 +3382,7 @@ static int selinux_task_setnice(struct task_struct *p, int nice)
         if (rc)
                 return rc;
 
-        return task_has_perm(current, p, PROCESS__SETSCHED);
+        return current_has_perm(p, PROCESS__SETSCHED);
 }
 
 static int selinux_task_setioprio(struct task_struct *p, int ioprio)
@@ -3279,12 +3393,12 @@ static int selinux_task_setioprio(struct task_struct *p, int ioprio)
         if (rc)
                 return rc;
 
-        return task_has_perm(current, p, PROCESS__SETSCHED);
+        return current_has_perm(p, PROCESS__SETSCHED);
 }
 
 static int selinux_task_getioprio(struct task_struct *p)
 {
-        return task_has_perm(current, p, PROCESS__GETSCHED);
+        return current_has_perm(p, PROCESS__GETSCHED);
 }
 
 static int selinux_task_setrlimit(unsigned int resource, struct rlimit *new_rlim)
@@ -3299,9 +3413,9 @@ static int selinux_task_setrlimit(unsigned int resource, struct rlimit *new_rlim
         /* Control the ability to change the hard limit (whether
            lowering or raising it), so that the hard limit can
            later be used as a safe reset point for the soft limit
-           upon context transitions. See selinux_bprm_apply_creds. */
+           upon context transitions.  See selinux_bprm_committing_creds. */
         if (old_rlim->rlim_max != new_rlim->rlim_max)
-                return task_has_perm(current, current, PROCESS__SETRLIMIT);
+                return current_has_perm(current, PROCESS__SETRLIMIT);
 
         return 0;
 }
@@ -3314,17 +3428,17 @@ static int selinux_task_setscheduler(struct task_struct *p, int policy, struct s
         if (rc)
                 return rc;
 
-        return task_has_perm(current, p, PROCESS__SETSCHED);
+        return current_has_perm(p, PROCESS__SETSCHED);
 }
 
 static int selinux_task_getscheduler(struct task_struct *p)
 {
-        return task_has_perm(current, p, PROCESS__GETSCHED);
+        return current_has_perm(p, PROCESS__GETSCHED);
 }
 
 static int selinux_task_movememory(struct task_struct *p)
 {
-        return task_has_perm(current, p, PROCESS__SETSCHED);
+        return current_has_perm(p, PROCESS__SETSCHED);
 }
 
 static int selinux_task_kill(struct task_struct *p, struct siginfo *info,
@@ -3332,7 +3446,6 @@ static int selinux_task_kill(struct task_struct *p, struct siginfo *info,
 {
         u32 perm;
         int rc;
-        struct task_security_struct *tsec;
 
         rc = secondary_ops->task_kill(p, info, sig, secid);
         if (rc)
@@ -3342,11 +3455,11 @@ static int selinux_task_kill(struct task_struct *p, struct siginfo *info,
                 perm = PROCESS__SIGNULL; /* null signal; existence test */
         else
                 perm = signal_to_av(sig);
-        tsec = p->security;
         if (secid)
-                rc = avc_has_perm(secid, tsec->sid, SECCLASS_PROCESS, perm, NULL);
+                rc = avc_has_perm(secid, task_sid(p),
+                                  SECCLASS_PROCESS, perm, NULL);
         else
-                rc = task_has_perm(current, p, perm);
+                rc = current_has_perm(p, perm);
         return rc;
 }
 
@@ -3354,13 +3467,12 @@ static int selinux_task_prctl(int option,
                               unsigned long arg2,
                               unsigned long arg3,
                               unsigned long arg4,
-                              unsigned long arg5,
-                              long *rc_p)
+                              unsigned long arg5)
 {
         /* The current prctl operations do not appear to require
            any SELinux controls since they merely observe or modify
            the state of the current process. */
-        return secondary_ops->task_prctl(option, arg2, arg3, arg4, arg5, rc_p);
+        return secondary_ops->task_prctl(option, arg2, arg3, arg4, arg5);
 }
 
 static int selinux_task_wait(struct task_struct *p)
@@ -3368,27 +3480,14 @@ static int selinux_task_wait(struct task_struct *p)
         return task_has_perm(p, current, PROCESS__SIGCHLD);
 }
 
-static void selinux_task_reparent_to_init(struct task_struct *p)
-{
-        struct task_security_struct *tsec;
-
-        secondary_ops->task_reparent_to_init(p);
-
-        tsec = p->security;
-        tsec->osid = tsec->sid;
-        tsec->sid = SECINITSID_KERNEL;
-        return;
-}
-
 static void selinux_task_to_inode(struct task_struct *p,
                                   struct inode *inode)
 {
-        struct task_security_struct *tsec = p->security;
         struct inode_security_struct *isec = inode->i_security;
+        u32 sid = task_sid(p);
 
-        isec->sid = tsec->sid;
+        isec->sid = sid;
         isec->initialized = 1;
-        return;
 }
 
 /* Returns error only if unable to parse addresses */
@@ -3627,19 +3726,19 @@ static int socket_has_perm(struct task_struct *task, struct socket *sock,
                            u32 perms)
 {
         struct inode_security_struct *isec;
-        struct task_security_struct *tsec;
         struct avc_audit_data ad;
+        u32 sid;
         int err = 0;
 
-        tsec = task->security;
         isec = SOCK_INODE(sock)->i_security;
 
         if (isec->sid == SECINITSID_KERNEL)
                 goto out;
+        sid = task_sid(task);
 
         AVC_AUDIT_DATA_INIT(&ad, NET);
         ad.u.net.sk = sock->sk;
-        err = avc_has_perm(tsec->sid, isec->sid, isec->sclass, perms, &ad);
+        err = avc_has_perm(sid, isec->sid, isec->sclass, perms, &ad);
 
 out:
         return err;
@@ -3648,18 +3747,20 @@ out:
 static int selinux_socket_create(int family, int type,
                                  int protocol, int kern)
 {
+        const struct cred *cred = current_cred();
+        const struct task_security_struct *tsec = cred->security;
+        u32 sid, newsid;
+        u16 secclass;
         int err = 0;
-        struct task_security_struct *tsec;
-        u32 newsid;
 
         if (kern)
                 goto out;
 
-        tsec = current->security;
-        newsid = tsec->sockcreate_sid ? : tsec->sid;
-        err = avc_has_perm(tsec->sid, newsid,
-                           socket_type_to_security_class(family, type,
-                           protocol), SOCKET__CREATE, NULL);
+        sid = tsec->sid;
+        newsid = tsec->sockcreate_sid ?: sid;
+
+        secclass = socket_type_to_security_class(family, type, protocol);
+        err = avc_has_perm(sid, newsid, secclass, SOCKET__CREATE, NULL);
 
 out:
         return err;
@@ -3668,18 +3769,26 @@ out:
 static int selinux_socket_post_create(struct socket *sock, int family,
                                       int type, int protocol, int kern)
 {
-        int err = 0;
+        const struct cred *cred = current_cred();
+        const struct task_security_struct *tsec = cred->security;
         struct inode_security_struct *isec;
-        struct task_security_struct *tsec;
         struct sk_security_struct *sksec;
-        u32 newsid;
+        u32 sid, newsid;
+        int err = 0;
+
+        sid = tsec->sid;
+        newsid = tsec->sockcreate_sid;
 
         isec = SOCK_INODE(sock)->i_security;
 
-        tsec = current->security;
-        newsid = tsec->sockcreate_sid ? : tsec->sid;
+        if (kern)
+                isec->sid = SECINITSID_KERNEL;
+        else if (newsid)
+                isec->sid = newsid;
+        else
+                isec->sid = sid;
+
         isec->sclass = socket_type_to_security_class(family, type, protocol);
-        isec->sid = kern ? SECINITSID_KERNEL : newsid;
         isec->initialized = 1;
 
         if (sock->sk) {
@@ -3714,7 +3823,6 @@ static int selinux_socket_bind(struct socket *sock, struct sockaddr *address, in
         if (family == PF_INET || family == PF_INET6) {
                 char *addrp;
                 struct inode_security_struct *isec;
-                struct task_security_struct *tsec;
                 struct avc_audit_data ad;
                 struct sockaddr_in *addr4 = NULL;
                 struct sockaddr_in6 *addr6 = NULL;
@@ -3722,7 +3830,6 @@ static int selinux_socket_bind(struct socket *sock, struct sockaddr *address, in
                 struct sock *sk = sock->sk;
                 u32 sid, node_perm;
 
-                tsec = current->security;
                 isec = SOCK_INODE(sock)->i_security;
 
                 if (family == PF_INET) {
@@ -4387,7 +4494,7 @@ static int selinux_nlmsg_perm(struct sock *sk, struct sk_buff *skb)
                                   "SELinux:  unrecognized netlink message"
                                   " type=%hu for sclass=%hu\n",
                                   nlh->nlmsg_type, isec->sclass);
-                        if (!selinux_enforcing)
+                        if (!selinux_enforcing || security_get_allow_unknown())
                                 err = 0;
                 }
 
@@ -4763,15 +4870,16 @@ static int ipc_alloc_security(struct task_struct *task,
                               struct kern_ipc_perm *perm,
                               u16 sclass)
 {
-        struct task_security_struct *tsec = task->security;
         struct ipc_security_struct *isec;
+        u32 sid;
 
         isec = kzalloc(sizeof(struct ipc_security_struct), GFP_KERNEL);
         if (!isec)
                 return -ENOMEM;
 
+        sid = task_sid(task);
         isec->sclass = sclass;
-        isec->sid = tsec->sid;
+        isec->sid = sid;
         perm->security = isec;
 
         return 0;
@@ -4809,17 +4917,16 @@ static void msg_msg_free_security(struct msg_msg *msg)
 static int ipc_has_perm(struct kern_ipc_perm *ipc_perms,
                         u32 perms)
 {
-        struct task_security_struct *tsec;
         struct ipc_security_struct *isec;
         struct avc_audit_data ad;
+        u32 sid = current_sid();
 
-        tsec = current->security;
         isec = ipc_perms->security;
 
         AVC_AUDIT_DATA_INIT(&ad, IPC);
         ad.u.ipc_id = ipc_perms->key;
 
-        return avc_has_perm(tsec->sid, isec->sid, isec->sclass, perms, &ad);
+        return avc_has_perm(sid, isec->sid, isec->sclass, perms, &ad);
 }
 
 static int selinux_msg_msg_alloc_security(struct msg_msg *msg)
@@ -4835,22 +4942,21 @@ static void selinux_msg_msg_free_security(struct msg_msg *msg)
 /* message queue security operations */
 static int selinux_msg_queue_alloc_security(struct msg_queue *msq)
 {
-        struct task_security_struct *tsec;
         struct ipc_security_struct *isec;
         struct avc_audit_data ad;
+        u32 sid = current_sid();
         int rc;
 
         rc = ipc_alloc_security(current, &msq->q_perm, SECCLASS_MSGQ);
         if (rc)
                 return rc;
 
-        tsec = current->security;
         isec = msq->q_perm.security;
 
         AVC_AUDIT_DATA_INIT(&ad, IPC);
         ad.u.ipc_id = msq->q_perm.key;
 
-        rc = avc_has_perm(tsec->sid, isec->sid, SECCLASS_MSGQ,
+        rc = avc_has_perm(sid, isec->sid, SECCLASS_MSGQ,
                           MSGQ__CREATE, &ad);
         if (rc) {
                 ipc_free_security(&msq->q_perm);
@@ -4866,17 +4972,16 @@ static void selinux_msg_queue_free_security(struct msg_queue *msq)
 
 static int selinux_msg_queue_associate(struct msg_queue *msq, int msqflg)
 {
-        struct task_security_struct *tsec;
         struct ipc_security_struct *isec;
         struct avc_audit_data ad;
+        u32 sid = current_sid();
 
-        tsec = current->security;
         isec = msq->q_perm.security;
 
         AVC_AUDIT_DATA_INIT(&ad, IPC);
         ad.u.ipc_id = msq->q_perm.key;
 
-        return avc_has_perm(tsec->sid, isec->sid, SECCLASS_MSGQ,
+        return avc_has_perm(sid, isec->sid, SECCLASS_MSGQ,
                             MSGQ__ASSOCIATE, &ad);
 }
 
@@ -4910,13 +5015,12 @@ static int selinux_msg_queue_msgctl(struct msg_queue *msq, int cmd)
 
 static int selinux_msg_queue_msgsnd(struct msg_queue *msq, struct msg_msg *msg, int msqflg)
 {
-        struct task_security_struct *tsec;
         struct ipc_security_struct *isec;
         struct msg_security_struct *msec;
         struct avc_audit_data ad;
+        u32 sid = current_sid();
         int rc;
 
-        tsec = current->security;
         isec = msq->q_perm.security;
         msec = msg->security;
 
@@ -4928,9 +5032,7 @@ static int selinux_msg_queue_msgsnd(struct msg_queue *msq, struct msg_msg *msg,
                  * Compute new sid based on current process and
                  * message queue this message will be stored in
                  */
-                rc = security_transition_sid(tsec->sid,
-                                             isec->sid,
-                                             SECCLASS_MSG,
+                rc = security_transition_sid(sid, isec->sid, SECCLASS_MSG,
                                              &msec->sid);
                 if (rc)
                         return rc;
@@ -4940,16 +5042,16 @@ static int selinux_msg_queue_msgsnd(struct msg_queue *msq, struct msg_msg *msg,
         ad.u.ipc_id = msq->q_perm.key;
 
         /* Can this process write to the queue? */
-        rc = avc_has_perm(tsec->sid, isec->sid, SECCLASS_MSGQ,
+        rc = avc_has_perm(sid, isec->sid, SECCLASS_MSGQ,
                           MSGQ__WRITE, &ad);
         if (!rc)
                 /* Can this process send the message */
-                rc = avc_has_perm(tsec->sid, msec->sid,
-                                  SECCLASS_MSG, MSG__SEND, &ad);
+                rc = avc_has_perm(sid, msec->sid, SECCLASS_MSG,
+                                  MSG__SEND, &ad);
         if (!rc)
                 /* Can the message be put in the queue? */
-                rc = avc_has_perm(msec->sid, isec->sid,
-                                  SECCLASS_MSGQ, MSGQ__ENQUEUE, &ad);
+                rc = avc_has_perm(msec->sid, isec->sid, SECCLASS_MSGQ,
+                                  MSGQ__ENQUEUE, &ad);
 
         return rc;
 }
@@ -4958,23 +5060,22 @@ static int selinux_msg_queue_msgrcv(struct msg_queue *msq, struct msg_msg *msg,
                                     struct task_struct *target,
                                     long type, int mode)
 {
-        struct task_security_struct *tsec;
         struct ipc_security_struct *isec;
         struct msg_security_struct *msec;
         struct avc_audit_data ad;
+        u32 sid = task_sid(target);
         int rc;
 
-        tsec = target->security;
         isec = msq->q_perm.security;
         msec = msg->security;
 
         AVC_AUDIT_DATA_INIT(&ad, IPC);
         ad.u.ipc_id = msq->q_perm.key;
 
-        rc = avc_has_perm(tsec->sid, isec->sid,
+        rc = avc_has_perm(sid, isec->sid,
                           SECCLASS_MSGQ, MSGQ__READ, &ad);
         if (!rc)
-                rc = avc_has_perm(tsec->sid, msec->sid,
+                rc = avc_has_perm(sid, msec->sid,
                                   SECCLASS_MSG, MSG__RECEIVE, &ad);
         return rc;
 }
@@ -4982,22 +5083,21 @@ static int selinux_msg_queue_msgrcv(struct msg_queue *msq, struct msg_msg *msg,
 /* Shared Memory security operations */
 static int selinux_shm_alloc_security(struct shmid_kernel *shp)
 {
-        struct task_security_struct *tsec;
         struct ipc_security_struct *isec;
         struct avc_audit_data ad;
+        u32 sid = current_sid();
         int rc;
 
         rc = ipc_alloc_security(current, &shp->shm_perm, SECCLASS_SHM);
         if (rc)
                 return rc;
 
-        tsec = current->security;
         isec = shp->shm_perm.security;
 
         AVC_AUDIT_DATA_INIT(&ad, IPC);
         ad.u.ipc_id = shp->shm_perm.key;
 
-        rc = avc_has_perm(tsec->sid, isec->sid, SECCLASS_SHM,
+        rc = avc_has_perm(sid, isec->sid, SECCLASS_SHM,
                           SHM__CREATE, &ad);
         if (rc) {
                 ipc_free_security(&shp->shm_perm);
@@ -5013,17 +5113,16 @@ static void selinux_shm_free_security(struct shmid_kernel *shp)
 
 static int selinux_shm_associate(struct shmid_kernel *shp, int shmflg)
 {
-        struct task_security_struct *tsec;
         struct ipc_security_struct *isec;
         struct avc_audit_data ad;
+        u32 sid = current_sid();
 
-        tsec = current->security;
         isec = shp->shm_perm.security;
 
         AVC_AUDIT_DATA_INIT(&ad, IPC);
         ad.u.ipc_id = shp->shm_perm.key;
 
-        return avc_has_perm(tsec->sid, isec->sid, SECCLASS_SHM,
+        return avc_has_perm(sid, isec->sid, SECCLASS_SHM,
                             SHM__ASSOCIATE, &ad);
 }
 
@@ -5081,22 +5180,21 @@ static int selinux_shm_shmat(struct shmid_kernel *shp,
 /* Semaphore security operations */
 static int selinux_sem_alloc_security(struct sem_array *sma)
 {
-        struct task_security_struct *tsec;
         struct ipc_security_struct *isec;
         struct avc_audit_data ad;
+        u32 sid = current_sid();
         int rc;
 
         rc = ipc_alloc_security(current, &sma->sem_perm, SECCLASS_SEM);
         if (rc)
                 return rc;
 
-        tsec = current->security;
         isec = sma->sem_perm.security;
 
         AVC_AUDIT_DATA_INIT(&ad, IPC);
         ad.u.ipc_id = sma->sem_perm.key;
 
-        rc = avc_has_perm(tsec->sid, isec->sid, SECCLASS_SEM,
+        rc = avc_has_perm(sid, isec->sid, SECCLASS_SEM,
                           SEM__CREATE, &ad);
         if (rc) {
                 ipc_free_security(&sma->sem_perm);
@@ -5112,17 +5210,16 @@ static void selinux_sem_free_security(struct sem_array *sma)
 
 static int selinux_sem_associate(struct sem_array *sma, int semflg)
 {
-        struct task_security_struct *tsec;
         struct ipc_security_struct *isec;
         struct avc_audit_data ad;
+        u32 sid = current_sid();
 
-        tsec = current->security;
         isec = sma->sem_perm.security;
 
         AVC_AUDIT_DATA_INIT(&ad, IPC);
         ad.u.ipc_id = sma->sem_perm.key;
 
-        return avc_has_perm(tsec->sid, isec->sid, SECCLASS_SEM,
+        return avc_has_perm(sid, isec->sid, SECCLASS_SEM,
                             SEM__ASSOCIATE, &ad);
 }
 
@@ -5212,33 +5309,35 @@ static void selinux_d_instantiate(struct dentry *dentry, struct inode *inode)
 static int selinux_getprocattr(struct task_struct *p,
                                char *name, char **value)
 {
-        struct task_security_struct *tsec;
+        const struct task_security_struct *__tsec;
         u32 sid;
         int error;
         unsigned len;
 
         if (current != p) {
-                error = task_has_perm(current, p, PROCESS__GETATTR);
+                error = current_has_perm(p, PROCESS__GETATTR);
                 if (error)
                         return error;
         }
 
-        tsec = p->security;
+        rcu_read_lock();
+        __tsec = __task_cred(p)->security;
 
         if (!strcmp(name, "current"))
-                sid = tsec->sid;
+                sid = __tsec->sid;
         else if (!strcmp(name, "prev"))
-                sid = tsec->osid;
+                sid = __tsec->osid;
         else if (!strcmp(name, "exec"))
-                sid = tsec->exec_sid;
+                sid = __tsec->exec_sid;
         else if (!strcmp(name, "fscreate"))
-                sid = tsec->create_sid;
+                sid = __tsec->create_sid;
         else if (!strcmp(name, "keycreate"))
-                sid = tsec->keycreate_sid;
+                sid = __tsec->keycreate_sid;
         else if (!strcmp(name, "sockcreate"))
-                sid = tsec->sockcreate_sid;
+                sid = __tsec->sockcreate_sid;
         else
-                return -EINVAL;
+                goto invalid;
+        rcu_read_unlock();
 
         if (!sid)
                 return 0;
@@ -5247,6 +5346,10 @@ static int selinux_getprocattr(struct task_struct *p,
         if (error)
                 return error;
         return len;
+
+invalid:
+        rcu_read_unlock();
+        return -EINVAL;
 }
 
 static int selinux_setprocattr(struct task_struct *p,
@@ -5254,7 +5357,8 @@ static int selinux_setprocattr(struct task_struct *p,
 {
         struct task_security_struct *tsec;
         struct task_struct *tracer;
-        u32 sid = 0;
+        struct cred *new;
+        u32 sid = 0, ptsid;
         int error;
         char *str = value;
 
@@ -5270,15 +5374,15 @@ static int selinux_setprocattr(struct task_struct *p,
          * above restriction is ever removed.
          */
         if (!strcmp(name, "exec"))
-                error = task_has_perm(current, p, PROCESS__SETEXEC);
+                error = current_has_perm(p, PROCESS__SETEXEC);
         else if (!strcmp(name, "fscreate"))
-                error = task_has_perm(current, p, PROCESS__SETFSCREATE);
+                error = current_has_perm(p, PROCESS__SETFSCREATE);
         else if (!strcmp(name, "keycreate"))
-                error = task_has_perm(current, p, PROCESS__SETKEYCREATE);
+                error = current_has_perm(p, PROCESS__SETKEYCREATE);
         else if (!strcmp(name, "sockcreate"))
-                error = task_has_perm(current, p, PROCESS__SETSOCKCREATE);
+                error = current_has_perm(p, PROCESS__SETSOCKCREATE);
         else if (!strcmp(name, "current"))
-                error = task_has_perm(current, p, PROCESS__SETCURRENT);
+                error = current_has_perm(p, PROCESS__SETCURRENT);
         else
                 error = -EINVAL;
         if (error)
@@ -5301,87 +5405,75 @@ static int selinux_setprocattr(struct task_struct *p,
                         return error;
         }
 
+        new = prepare_creds();
+        if (!new)
+                return -ENOMEM;
+
         /* Permission checking based on the specified context is
            performed during the actual operation (execve,
            open/mkdir/...), when we know the full context of the
-           operation.  See selinux_bprm_set_security for the execve
+           operation.  See selinux_bprm_set_creds for the execve
            checks and may_create for the file creation checks. The
            operation will then fail if the context is not permitted. */
-        tsec = p->security;
-        if (!strcmp(name, "exec"))
+        tsec = new->security;
+        if (!strcmp(name, "exec")) {
                 tsec->exec_sid = sid;
-        else if (!strcmp(name, "fscreate"))
+        } else if (!strcmp(name, "fscreate")) {
                 tsec->create_sid = sid;
-        else if (!strcmp(name, "keycreate")) {
+        } else if (!strcmp(name, "keycreate")) {
                 error = may_create_key(sid, p);
                 if (error)
-                        return error;
+                        goto abort_change;
                 tsec->keycreate_sid = sid;
-        } else if (!strcmp(name, "sockcreate"))
+        } else if (!strcmp(name, "sockcreate")) {
                 tsec->sockcreate_sid = sid;
-        else if (!strcmp(name, "current")) {
-                struct av_decision avd;
-
+        } else if (!strcmp(name, "current")) {
+                error = -EINVAL;
                 if (sid == 0)
-                        return -EINVAL;
-                /*
-                 * SELinux allows to change context in the following case only.
-                 *  - Single threaded processes.
-                 *  - Multi threaded processes intend to change its context into
-                 *    more restricted domain (defined by TYPEBOUNDS statement).
-                 */
-                if (atomic_read(&p->mm->mm_users) != 1) {
-                        struct task_struct *g, *t;
-                        struct mm_struct *mm = p->mm;
-                        read_lock(&tasklist_lock);
-                        do_each_thread(g, t) {
-                                if (t->mm == mm && t != p) {
-                                        read_unlock(&tasklist_lock);
-                                        error = security_bounded_transition(tsec->sid, sid);
-                                        if (!error)
-                                                goto boundary_ok;
-
-                                        return error;
-                                }
-                        } while_each_thread(g, t);
-                        read_unlock(&tasklist_lock);
+                        goto abort_change;
+
+                /* Only allow single threaded processes to change context */
+                error = -EPERM;
+                if (!is_single_threaded(p)) {
+                        error = security_bounded_transition(tsec->sid, sid);
+                        if (error)
+                                goto abort_change;
                 }
-boundary_ok:
 
                 /* Check permissions for the transition. */
                 error = avc_has_perm(tsec->sid, sid, SECCLASS_PROCESS,
                                      PROCESS__DYNTRANSITION, NULL);
                 if (error)
-                        return error;
+                        goto abort_change;
 
                 /* Check for ptracing, and update the task SID if ok.
                    Otherwise, leave SID unchanged and fail. */
+                ptsid = 0;
                 task_lock(p);
-                rcu_read_lock();
                 tracer = tracehook_tracer_task(p);
-                if (tracer != NULL) {
-                        struct task_security_struct *ptsec = tracer->security;
-                        u32 ptsid = ptsec->sid;
-                        rcu_read_unlock();
-                        error = avc_has_perm_noaudit(ptsid, sid,
-                                                     SECCLASS_PROCESS,
-                                                     PROCESS__PTRACE, 0, &avd);
-                        if (!error)
-                                tsec->sid = sid;
-                        task_unlock(p);
-                        avc_audit(ptsid, sid, SECCLASS_PROCESS,
-                                  PROCESS__PTRACE, &avd, error, NULL);
+                if (tracer)
+                        ptsid = task_sid(tracer);
+                task_unlock(p);
+
+                if (tracer) {
+                        error = avc_has_perm(ptsid, sid, SECCLASS_PROCESS,
+                                             PROCESS__PTRACE, NULL);
                         if (error)
-                                return error;
-                } else {
-                        rcu_read_unlock();
-                        tsec->sid = sid;
-                        task_unlock(p);
+                                goto abort_change;
                 }
-        } else
-                return -EINVAL;
 
+                tsec->sid = sid;
+        } else {
+                error = -EINVAL;
+                goto abort_change;
+        }
+
+        commit_creds(new);
         return size;
+
+abort_change:
+        abort_creds(new);
+        return error;
 }
 
 static int selinux_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
@@ -5401,22 +5493,23 @@ static void selinux_release_secctx(char *secdata, u32 seclen)
 
 #ifdef CONFIG_KEYS
 
-static int selinux_key_alloc(struct key *k, struct task_struct *tsk,
+static int selinux_key_alloc(struct key *k, const struct cred *cred,
                              unsigned long flags)
 {
-        struct task_security_struct *tsec = tsk->security;
+        const struct task_security_struct *tsec;
         struct key_security_struct *ksec;
 
         ksec = kzalloc(sizeof(struct key_security_struct), GFP_KERNEL);
         if (!ksec)
                 return -ENOMEM;
 
+        tsec = cred->security;
         if (tsec->keycreate_sid)
                 ksec->sid = tsec->keycreate_sid;
         else
                 ksec->sid = tsec->sid;
-        k->security = ksec;
 
+        k->security = ksec;
         return 0;
 }
 
@@ -5429,17 +5522,12 @@ static void selinux_key_free(struct key *k)
 }
 
 static int selinux_key_permission(key_ref_t key_ref,
-                            struct task_struct *ctx,
-                            key_perm_t perm)
+                                  const struct cred *cred,
+                                  key_perm_t perm)
 {
         struct key *key;
-        struct task_security_struct *tsec;
         struct key_security_struct *ksec;
-
-        key = key_ref_to_ptr(key_ref);
-
-        tsec = ctx->security;
-        ksec = key->security;
+        u32 sid;
 
         /* if no specific permissions are requested, we skip the
            permission check. No serious, additional covert channels
@@ -5447,8 +5535,12 @@ static int selinux_key_permission(key_ref_t key_ref,
         if (perm == 0)
                 return 0;
 
-        return avc_has_perm(tsec->sid, ksec->sid,
-                            SECCLASS_KEY, perm, NULL);
+        sid = cred_sid(cred);
+
+        key = key_ref_to_ptr(key_ref);
+        ksec = key->security;
+
+        return avc_has_perm(sid, ksec->sid, SECCLASS_KEY, perm, NULL);
 }
 
 static int selinux_key_getsecurity(struct key *key, char **_buffer)
@@ -5473,8 +5565,7 @@ static struct security_operations selinux_ops = {
         .ptrace_may_access =            selinux_ptrace_may_access,
         .ptrace_traceme =               selinux_ptrace_traceme,
         .capget =                       selinux_capget,
-        .capset_check =                 selinux_capset_check,
-        .capset_set =                   selinux_capset_set,
+        .capset =                       selinux_capset,
         .sysctl =                       selinux_sysctl,
         .capable =                      selinux_capable,
         .quotactl =                     selinux_quotactl,
@@ -5485,12 +5576,10 @@ static struct security_operations selinux_ops = {
         .netlink_send =                 selinux_netlink_send,
         .netlink_recv =                 selinux_netlink_recv,
 
-        .bprm_alloc_security =          selinux_bprm_alloc_security,
-        .bprm_free_security =           selinux_bprm_free_security,
-        .bprm_apply_creds =             selinux_bprm_apply_creds,
-        .bprm_post_apply_creds =        selinux_bprm_post_apply_creds,
-        .bprm_set_security =            selinux_bprm_set_security,
+        .bprm_set_creds =               selinux_bprm_set_creds,
         .bprm_check_security =          selinux_bprm_check_security,
+        .bprm_committing_creds =        selinux_bprm_committing_creds,
+        .bprm_committed_creds =         selinux_bprm_committed_creds,
         .bprm_secureexec =              selinux_bprm_secureexec,
 
         .sb_alloc_security =            selinux_sb_alloc_security,
@@ -5549,10 +5638,13 @@ static struct security_operations selinux_ops = {
         .dentry_open =                  selinux_dentry_open,
 
         .task_create =                  selinux_task_create,
-        .task_alloc_security =          selinux_task_alloc_security,
-        .task_free_security =           selinux_task_free_security,
+        .cred_free =                    selinux_cred_free,
+        .cred_prepare =                 selinux_cred_prepare,
+        .cred_commit =                  selinux_cred_commit,
+        .kernel_act_as =                selinux_kernel_act_as,
+        .kernel_create_files_as =       selinux_kernel_create_files_as,
         .task_setuid =                  selinux_task_setuid,
-        .task_post_setuid =             selinux_task_post_setuid,
+        .task_fix_setuid =              selinux_task_fix_setuid,
         .task_setgid =                  selinux_task_setgid,
         .task_setpgid =                 selinux_task_setpgid,
         .task_getpgid =                 selinux_task_getpgid,
@@ -5569,7 +5661,6 @@ static struct security_operations selinux_ops = {
         .task_kill =                    selinux_task_kill,
         .task_wait =                    selinux_task_wait,
         .task_prctl =                   selinux_task_prctl,
-        .task_reparent_to_init =        selinux_task_reparent_to_init,
         .task_to_inode =                selinux_task_to_inode,
 
         .ipc_permission =               selinux_ipc_permission,
@@ -5665,8 +5756,6 @@ static struct security_operations selinux_ops = {
 
 static __init int selinux_init(void)
 {
-        struct task_security_struct *tsec;
-
         if (!security_module_enable(&selinux_ops)) {
                 selinux_enabled = 0;
                 return 0;
@@ -5680,10 +5769,7 @@ static __init int selinux_init(void)
         printk(KERN_INFO "SELinux:  Initializing.\n");
 
         /* Set the security state for the initial task. */
-        if (task_alloc_security(current))
-                panic("SELinux:  Failed to initialize initial task.\n");
-        tsec = current->security;
-        tsec->osid = tsec->sid = SECINITSID_KERNEL;
+        cred_init_security();
 
         sel_inode_cache = kmem_cache_create("selinux_inode_security",
                                             sizeof(struct inode_security_struct),
diff --git a/security/selinux/include/av_perm_to_string.h b/security/selinux/include/av_perm_to_string.h
index 1223b4ff9bee..c0c885427b91 100644
--- a/security/selinux/include/av_perm_to_string.h
+++ b/security/selinux/include/av_perm_to_string.h
@@ -176,3 +176,5 @@
    S_(SECCLASS_DCCP_SOCKET, DCCP_SOCKET__NAME_CONNECT, "name_connect")
    S_(SECCLASS_MEMPROTECT, MEMPROTECT__MMAP_ZERO, "mmap_zero")
    S_(SECCLASS_PEER, PEER__RECV, "recv")
+   S_(SECCLASS_KERNEL_SERVICE, KERNEL_SERVICE__USE_AS_OVERRIDE, "use_as_override")
+   S_(SECCLASS_KERNEL_SERVICE, KERNEL_SERVICE__CREATE_FILES_AS, "create_files_as")
diff --git a/security/selinux/include/av_permissions.h b/security/selinux/include/av_permissions.h
index c4c51165c505..0ba79fe00e11 100644
--- a/security/selinux/include/av_permissions.h
+++ b/security/selinux/include/av_permissions.h
@@ -841,3 +841,5 @@
 #define DCCP_SOCKET__NAME_CONNECT                 0x00800000UL
 #define MEMPROTECT__MMAP_ZERO                     0x00000001UL
 #define PEER__RECV                                0x00000001UL
+#define KERNEL_SERVICE__USE_AS_OVERRIDE           0x00000001UL
+#define KERNEL_SERVICE__CREATE_FILES_AS           0x00000002UL
diff --git a/security/selinux/include/class_to_string.h b/security/selinux/include/class_to_string.h
index bd813c366e34..21ec786611d4 100644
--- a/security/selinux/include/class_to_string.h
+++ b/security/selinux/include/class_to_string.h
@@ -72,3 +72,8 @@
     S_(NULL)
     S_("peer")
     S_("capability2")
+    S_(NULL)
+    S_(NULL)
+    S_(NULL)
+    S_(NULL)
+    S_("kernel_service")
diff --git a/security/selinux/include/flask.h b/security/selinux/include/flask.h
index febf8868e852..882f27d66fac 100644
--- a/security/selinux/include/flask.h
+++ b/security/selinux/include/flask.h
@@ -52,6 +52,7 @@
 #define SECCLASS_MEMPROTECT                              61
 #define SECCLASS_PEER                                    68
 #define SECCLASS_CAPABILITY2                             69
+#define SECCLASS_KERNEL_SERVICE                          74
 
 /*
  * Security identifier indices for initial entities
diff --git a/security/selinux/include/objsec.h b/security/selinux/include/objsec.h
index f8be8d7fa26d..3cc45168f674 100644
--- a/security/selinux/include/objsec.h
+++ b/security/selinux/include/objsec.h
@@ -77,17 +77,6 @@ struct ipc_security_struct {
         u32 sid;        /* SID of IPC resource */
 };
 
-struct bprm_security_struct {
-        u32 sid;                /* SID for transformed process */
-        unsigned char set;
-
-        /*
-         * unsafe is used to share failure information from bprm_apply_creds()
-         * to bprm_post_apply_creds().
-         */
-        char unsafe;
-};
-
 struct netif_security_struct {
         int ifindex;                    /* device index */
         u32 sid;                        /* SID for this interface */
diff --git a/security/selinux/nlmsgtab.c b/security/selinux/nlmsgtab.c
index ff59c0c4804b..4ed7bab89c59 100644
--- a/security/selinux/nlmsgtab.c
+++ b/security/selinux/nlmsgtab.c
@@ -63,6 +63,9 @@ static struct nlmsg_perm nlmsg_route_perms[] =
         { RTM_GETANYCAST,       NETLINK_ROUTE_SOCKET__NLMSG_READ  },
         { RTM_GETNEIGHTBL,      NETLINK_ROUTE_SOCKET__NLMSG_READ  },
         { RTM_SETNEIGHTBL,      NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
+        { RTM_NEWADDRLABEL,     NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
+        { RTM_DELADDRLABEL,     NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
+        { RTM_GETADDRLABEL,     NETLINK_ROUTE_SOCKET__NLMSG_READ  },
 };
 
 static struct nlmsg_perm nlmsg_firewall_perms[] =
diff --git a/security/selinux/selinuxfs.c b/security/selinux/selinuxfs.c
index 69c9dccc8cf0..c86303638235 100644
--- a/security/selinux/selinuxfs.c
+++ b/security/selinux/selinuxfs.c
@@ -95,13 +95,18 @@ extern void selnl_notify_setenforce(int val);
 static int task_has_security(struct task_struct *tsk,
                              u32 perms)
 {
-        struct task_security_struct *tsec;
-
-        tsec = tsk->security;
+        const struct task_security_struct *tsec;
+        u32 sid = 0;
+
+        rcu_read_lock();
+        tsec = __task_cred(tsk)->security;
+        if (tsec)
+                sid = tsec->sid;
+        rcu_read_unlock();
         if (!tsec)
                 return -EACCES;
 
-        return avc_has_perm(tsec->sid, SECINITSID_SECURITY,
+        return avc_has_perm(sid, SECINITSID_SECURITY,
                             SECCLASS_SECURITY, perms, NULL);
 }
 
diff --git a/security/selinux/xfrm.c b/security/selinux/xfrm.c
index 8f17f542a116..c0eb72013d67 100644
--- a/security/selinux/xfrm.c
+++ b/security/selinux/xfrm.c
@@ -197,7 +197,7 @@ static int selinux_xfrm_sec_ctx_alloc(struct xfrm_sec_ctx **ctxp,
         struct xfrm_user_sec_ctx *uctx, u32 sid)
 {
         int rc = 0;
-        struct task_security_struct *tsec = current->security;
+        const struct task_security_struct *tsec = current_security();
         struct xfrm_sec_ctx *ctx = NULL;
         char *ctx_str = NULL;
         u32 str_len;
@@ -333,7 +333,7 @@ void selinux_xfrm_policy_free(struct xfrm_sec_ctx *ctx)
  */
 int selinux_xfrm_policy_delete(struct xfrm_sec_ctx *ctx)
 {
-        struct task_security_struct *tsec = current->security;
+        const struct task_security_struct *tsec = current_security();
         int rc = 0;
 
         if (ctx) {
@@ -378,7 +378,7 @@ void selinux_xfrm_state_free(struct xfrm_state *x)
   */
 int selinux_xfrm_state_delete(struct xfrm_state *x)
 {
-        struct task_security_struct *tsec = current->security;
+        const struct task_security_struct *tsec = current_security();
         struct xfrm_sec_ctx *ctx = x->security;
         int rc = 0;
 
diff --git a/security/smack/smack_access.c b/security/smack/smack_access.c
index 79ff21ed4c3b..247cec3b5a43 100644
--- a/security/smack/smack_access.c
+++ b/security/smack/smack_access.c
@@ -164,7 +164,7 @@ int smk_curacc(char *obj_label, u32 mode)
 {
         int rc;
 
-        rc = smk_access(current->security, obj_label, mode);
+        rc = smk_access(current_security(), obj_label, mode);
         if (rc == 0)
                 return 0;
 
@@ -173,7 +173,7 @@ int smk_curacc(char *obj_label, u32 mode)
          * only one that gets privilege and current does not
          * have that label.
          */
-        if (smack_onlycap != NULL && smack_onlycap != current->security)
+        if (smack_onlycap != NULL && smack_onlycap != current->cred->security)
                 return rc;
 
         if (capable(CAP_MAC_OVERRIDE))
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index 6e2dc0bab70d..1b5551dfc1f7 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -30,6 +30,8 @@
 
 #include "smack.h"
 
+#define task_security(task)     (task_cred_xxx((task), security))
+
 /*
  * I hope these are the hokeyist lines of code in the module. Casey.
  */
@@ -102,7 +104,7 @@ static int smack_ptrace_may_access(struct task_struct *ctp, unsigned int mode)
         if (rc != 0)
                 return rc;
 
-        rc = smk_access(current->security, ctp->security, MAY_READWRITE);
+        rc = smk_access(current_security(), task_security(ctp), MAY_READWRITE);
         if (rc != 0 && capable(CAP_MAC_OVERRIDE))
                 return 0;
         return rc;
@@ -124,7 +126,7 @@ static int smack_ptrace_traceme(struct task_struct *ptp)
         if (rc != 0)
                 return rc;
 
-        rc = smk_access(ptp->security, current->security, MAY_READWRITE);
+        rc = smk_access(task_security(ptp), current_security(), MAY_READWRITE);
         if (rc != 0 && has_capability(ptp, CAP_MAC_OVERRIDE))
                 return 0;
         return rc;
@@ -141,7 +143,7 @@ static int smack_ptrace_traceme(struct task_struct *ptp)
 static int smack_syslog(int type)
 {
         int rc;
-        char *sp = current->security;
+        char *sp = current_security();
 
         rc = cap_syslog(type);
         if (rc != 0)
@@ -248,11 +250,12 @@ static int smack_sb_copy_data(char *orig, char *smackopts)
 /**
  * smack_sb_kern_mount - Smack specific mount processing
  * @sb: the file system superblock
+ * @flags: the mount flags
  * @data: the smack mount options
  *
  * Returns 0 on success, an error code on failure
  */
-static int smack_sb_kern_mount(struct super_block *sb, void *data)
+static int smack_sb_kern_mount(struct super_block *sb, int flags, void *data)
 {
         struct dentry *root = sb->s_root;
         struct inode *inode = root->d_inode;
@@ -373,7 +376,7 @@ static int smack_sb_umount(struct vfsmount *mnt, int flags)
  */
 static int smack_inode_alloc_security(struct inode *inode)
 {
-        inode->i_security = new_inode_smack(current->security);
+        inode->i_security = new_inode_smack(current_security());
         if (inode->i_security == NULL)
                 return -ENOMEM;
         return 0;
@@ -818,7 +821,7 @@ static int smack_file_permission(struct file *file, int mask)
  */
 static int smack_file_alloc_security(struct file *file)
 {
-        file->f_security = current->security;
+        file->f_security = current_security();
         return 0;
 }
 
@@ -916,7 +919,7 @@ static int smack_file_fcntl(struct file *file, unsigned int cmd,
  */
 static int smack_file_set_fowner(struct file *file)
 {
-        file->f_security = current->security;
+        file->f_security = current_security();
         return 0;
 }
 
@@ -941,7 +944,7 @@ static int smack_file_send_sigiotask(struct task_struct *tsk,
          * struct fown_struct is never outside the context of a struct file
          */
         file = container_of(fown, struct file, f_owner);
-        rc = smk_access(file->f_security, tsk->security, MAY_WRITE);
+        rc = smk_access(file->f_security, tsk->cred->security, MAY_WRITE);
         if (rc != 0 && has_capability(tsk, CAP_MAC_OVERRIDE))
                 return 0;
         return rc;
@@ -973,33 +976,75 @@ static int smack_file_receive(struct file *file)
  */
 
 /**
- * smack_task_alloc_security - "allocate" a task blob
- * @tsk: the task in need of a blob
+ * smack_cred_free - "free" task-level security credentials
+ * @cred: the credentials in question
  *
  * Smack isn't using copies of blobs. Everyone
- * points to an immutable list. No alloc required.
- * No data copy required.
+ * points to an immutable list. The blobs never go away.
+ * There is no leak here.
+ */
+static void smack_cred_free(struct cred *cred)
+{
+        cred->security = NULL;
+}
+
+/**
+ * smack_cred_prepare - prepare new set of credentials for modification
+ * @new: the new credentials
+ * @old: the original credentials
+ * @gfp: the atomicity of any memory allocations
+ *
+ * Prepare a new set of credentials for modification.
+ */
+static int smack_cred_prepare(struct cred *new, const struct cred *old,
+                              gfp_t gfp)
+{
+        new->security = old->security;
+        return 0;
+}
+
+/*
+ * commit new credentials
+ * @new: the new credentials
+ * @old: the original credentials
+ */
+static void smack_cred_commit(struct cred *new, const struct cred *old)
+{
+}
+
+/**
+ * smack_kernel_act_as - Set the subjective context in a set of credentials
+ * @new points to the set of credentials to be modified.
+ * @secid specifies the security ID to be set
  *
- * Always returns 0
+ * Set the security data for a kernel service.
  */
-static int smack_task_alloc_security(struct task_struct *tsk)
+static int smack_kernel_act_as(struct cred *new, u32 secid)
 {
-        tsk->security = current->security;
+        char *smack = smack_from_secid(secid);
+
+        if (smack == NULL)
+                return -EINVAL;
 
+        new->security = smack;
         return 0;
 }
 
 /**
- * smack_task_free_security - "free" a task blob
- * @task: the task with the blob
+ * smack_kernel_create_files_as - Set the file creation label in a set of creds
+ * @new points to the set of credentials to be modified
+ * @inode points to the inode to use as a reference
  *
- * Smack isn't using copies of blobs. Everyone
- * points to an immutable list. The blobs never go away.
- * There is no leak here.
+ * Set the file creation context in a set of credentials to the same
+ * as the objective context of the specified inode
  */
-static void smack_task_free_security(struct task_struct *task)
+static int smack_kernel_create_files_as(struct cred *new,
+                                        struct inode *inode)
 {
-        task->security = NULL;
+        struct inode_smack *isp = inode->i_security;
+
+        new->security = isp->smk_inode;
+        return 0;
 }
 
 /**
@@ -1011,7 +1056,7 @@ static void smack_task_free_security(struct task_struct *task)
  */
 static int smack_task_setpgid(struct task_struct *p, pid_t pgid)
 {
-        return smk_curacc(p->security, MAY_WRITE);
+        return smk_curacc(task_security(p), MAY_WRITE);
 }
 
 /**
@@ -1022,7 +1067,7 @@ static int smack_task_setpgid(struct task_struct *p, pid_t pgid)
  */
 static int smack_task_getpgid(struct task_struct *p)
 {
-        return smk_curacc(p->security, MAY_READ);
+        return smk_curacc(task_security(p), MAY_READ);
 }
 
 /**
@@ -1033,7 +1078,7 @@ static int smack_task_getpgid(struct task_struct *p)
  */
 static int smack_task_getsid(struct task_struct *p)
 {
-        return smk_curacc(p->security, MAY_READ);
+        return smk_curacc(task_security(p), MAY_READ);
 }
 
 /**
@@ -1045,7 +1090,7 @@ static int smack_task_getsid(struct task_struct *p)
  */
 static void smack_task_getsecid(struct task_struct *p, u32 *secid)
 {
-        *secid = smack_to_secid(p->security);
+        *secid = smack_to_secid(task_security(p));
 }
 
 /**
@@ -1061,7 +1106,7 @@ static int smack_task_setnice(struct task_struct *p, int nice)
 
         rc = cap_task_setnice(p, nice);
         if (rc == 0)
-                rc = smk_curacc(p->security, MAY_WRITE);
+                rc = smk_curacc(task_security(p), MAY_WRITE);
         return rc;
 }
 
@@ -1078,7 +1123,7 @@ static int smack_task_setioprio(struct task_struct *p, int ioprio)
 
         rc = cap_task_setioprio(p, ioprio);
         if (rc == 0)
-                rc = smk_curacc(p->security, MAY_WRITE);
+                rc = smk_curacc(task_security(p), MAY_WRITE);
         return rc;
 }
 
@@ -1090,7 +1135,7 @@ static int smack_task_setioprio(struct task_struct *p, int ioprio)
  */
 static int smack_task_getioprio(struct task_struct *p)
 {
-        return smk_curacc(p->security, MAY_READ);
+        return smk_curacc(task_security(p), MAY_READ);
 }
 
 /**
@@ -1108,7 +1153,7 @@ static int smack_task_setscheduler(struct task_struct *p, int policy,
 
         rc = cap_task_setscheduler(p, policy, lp);
         if (rc == 0)
-                rc = smk_curacc(p->security, MAY_WRITE);
+                rc = smk_curacc(task_security(p), MAY_WRITE);
         return rc;
 }
 
@@ -1120,7 +1165,7 @@ static int smack_task_setscheduler(struct task_struct *p, int policy,
  */
 static int smack_task_getscheduler(struct task_struct *p)
 {
-        return smk_curacc(p->security, MAY_READ);
+        return smk_curacc(task_security(p), MAY_READ);
 }
 
 /**
@@ -1131,7 +1176,7 @@ static int smack_task_getscheduler(struct task_struct *p)
  */
 static int smack_task_movememory(struct task_struct *p)
 {
-        return smk_curacc(p->security, MAY_WRITE);
+        return smk_curacc(task_security(p), MAY_WRITE);
 }
 
 /**
@@ -1154,13 +1199,13 @@ static int smack_task_kill(struct task_struct *p, struct siginfo *info,
          * can write the receiver.
          */
         if (secid == 0)
-                return smk_curacc(p->security, MAY_WRITE);
+                return smk_curacc(task_security(p), MAY_WRITE);
         /*
          * If the secid isn't 0 we're dealing with some USB IO
          * specific behavior. This is not clean. For one thing
          * we can't take privilege into account.
          */
-        return smk_access(smack_from_secid(secid), p->security, MAY_WRITE);
+        return smk_access(smack_from_secid(secid), task_security(p), MAY_WRITE);
 }
 
 /**
@@ -1173,7 +1218,7 @@ static int smack_task_wait(struct task_struct *p)
 {
         int rc;
 
-        rc = smk_access(current->security, p->security, MAY_WRITE);
+        rc = smk_access(current_security(), task_security(p), MAY_WRITE);
         if (rc == 0)
                 return 0;
 
@@ -1204,7 +1249,7 @@ static int smack_task_wait(struct task_struct *p)
 static void smack_task_to_inode(struct task_struct *p, struct inode *inode)
 {
         struct inode_smack *isp = inode->i_security;
-        isp->smk_inode = p->security;
+        isp->smk_inode = task_security(p);
 }
 
 /*
@@ -1223,7 +1268,7 @@ static void smack_task_to_inode(struct task_struct *p, struct inode *inode)
  */
 static int smack_sk_alloc_security(struct sock *sk, int family, gfp_t gfp_flags)
 {
-        char *csp = current->security;
+        char *csp = current_security();
         struct socket_smack *ssp;
 
         ssp = kzalloc(sizeof(struct socket_smack), gfp_flags);
@@ -1448,7 +1493,7 @@ static int smack_flags_to_may(int flags)
  */
 static int smack_msg_msg_alloc_security(struct msg_msg *msg)
 {
-        msg->security = current->security;
+        msg->security = current_security();
         return 0;
 }
 
@@ -1484,7 +1529,7 @@ static int smack_shm_alloc_security(struct shmid_kernel *shp)
 {
         struct kern_ipc_perm *isp = &shp->shm_perm;
 
-        isp->security = current->security;
+        isp->security = current_security();
         return 0;
 }
 
@@ -1593,7 +1638,7 @@ static int smack_sem_alloc_security(struct sem_array *sma)
 {
         struct kern_ipc_perm *isp = &sma->sem_perm;
 
-        isp->security = current->security;
+        isp->security = current_security();
         return 0;
 }
 
@@ -1697,7 +1742,7 @@ static int smack_msg_queue_alloc_security(struct msg_queue *msq)
 {
         struct kern_ipc_perm *kisp = &msq->q_perm;
 
-        kisp->security = current->security;
+        kisp->security = current_security();
         return 0;
 }
 
@@ -1852,7 +1897,7 @@ static void smack_d_instantiate(struct dentry *opt_dentry, struct inode *inode)
         struct super_block *sbp;
         struct superblock_smack *sbsp;
         struct inode_smack *isp;
-        char *csp = current->security;
+        char *csp = current_security();
         char *fetched;
         char *final;
         struct dentry *dp;
@@ -2009,7 +2054,7 @@ static int smack_getprocattr(struct task_struct *p, char *name, char **value)
         if (strcmp(name, "current") != 0)
                 return -EINVAL;
 
-        cp = kstrdup(p->security, GFP_KERNEL);
+        cp = kstrdup(task_security(p), GFP_KERNEL);
         if (cp == NULL)
                 return -ENOMEM;
 
@@ -2033,6 +2078,7 @@ static int smack_getprocattr(struct task_struct *p, char *name, char **value)
 static int smack_setprocattr(struct task_struct *p, char *name,
                              void *value, size_t size)
 {
+        struct cred *new;
         char *newsmack;
 
         /*
@@ -2055,7 +2101,11 @@ static int smack_setprocattr(struct task_struct *p, char *name,
         if (newsmack == NULL)
                 return -EINVAL;
 
-        p->security = newsmack;
+        new = prepare_creds();
+        if (!new)
+                return -ENOMEM;
+        new->security = newsmack;
+        commit_creds(new);
         return size;
 }
 
@@ -2288,8 +2338,7 @@ static void smack_sock_graft(struct sock *sk, struct socket *parent)
                 return;
 
         ssp = sk->sk_security;
-        ssp->smk_in = current->security;
-        ssp->smk_out = current->security;
+        ssp->smk_in = ssp->smk_out = current_security();
         ssp->smk_packet[0] = '\0';
 
         rc = smack_netlabel(sk);
@@ -2352,17 +2401,17 @@ static int smack_inet_conn_request(struct sock *sk, struct sk_buff *skb,
 /**
  * smack_key_alloc - Set the key security blob
  * @key: object
- * @tsk: the task associated with the key
+ * @cred: the credentials to use
  * @flags: unused
  *
  * No allocation required
  *
  * Returns 0
  */
-static int smack_key_alloc(struct key *key, struct task_struct *tsk,
+static int smack_key_alloc(struct key *key, const struct cred *cred,
                            unsigned long flags)
 {
-        key->security = tsk->security;
+        key->security = cred->security;
         return 0;
 }
 
@@ -2380,14 +2429,14 @@ static void smack_key_free(struct key *key)
 /*
  * smack_key_permission - Smack access on a key
  * @key_ref: gets to the object
- * @context: task involved
+ * @cred: the credentials to use
  * @perm: unused
  *
  * Return 0 if the task has read and write to the object,
  * an error code otherwise
  */
 static int smack_key_permission(key_ref_t key_ref,
-                                struct task_struct *context, key_perm_t perm)
+                                const struct cred *cred, key_perm_t perm)
 {
         struct key *keyp;
 
@@ -2403,10 +2452,10 @@ static int smack_key_permission(key_ref_t key_ref,
         /*
          * This should not occur
          */
-        if (context->security == NULL)
+        if (cred->security == NULL)
                 return -EACCES;
 
-        return smk_access(context->security, keyp->security, MAY_READWRITE);
+        return smk_access(cred->security, keyp->security, MAY_READWRITE);
 }
 #endif /* CONFIG_KEYS */
 
@@ -2577,15 +2626,13 @@ struct security_operations smack_ops = {
         .ptrace_may_access =            smack_ptrace_may_access,
         .ptrace_traceme =               smack_ptrace_traceme,
         .capget =                       cap_capget,
-        .capset_check =                 cap_capset_check,
-        .capset_set =                   cap_capset_set,
+        .capset =                       cap_capset,
         .capable =                      cap_capable,
         .syslog =                       smack_syslog,
         .settime =                      cap_settime,
         .vm_enough_memory =             cap_vm_enough_memory,
 
-        .bprm_apply_creds =             cap_bprm_apply_creds,
-        .bprm_set_security =            cap_bprm_set_security,
+        .bprm_set_creds =               cap_bprm_set_creds,
         .bprm_secureexec =              cap_bprm_secureexec,
 
         .sb_alloc_security =            smack_sb_alloc_security,
@@ -2627,9 +2674,12 @@ struct security_operations smack_ops = {
         .file_send_sigiotask =          smack_file_send_sigiotask,
         .file_receive =                 smack_file_receive,
 
-        .task_alloc_security =          smack_task_alloc_security,
-        .task_free_security =           smack_task_free_security,
-        .task_post_setuid =             cap_task_post_setuid,
+        .cred_free =                    smack_cred_free,
+        .cred_prepare =                 smack_cred_prepare,
+        .cred_commit =                  smack_cred_commit,
+        .kernel_act_as =                smack_kernel_act_as,
+        .kernel_create_files_as =       smack_kernel_create_files_as,
+        .task_fix_setuid =              cap_task_fix_setuid,
         .task_setpgid =                 smack_task_setpgid,
         .task_getpgid =                 smack_task_getpgid,
         .task_getsid =                  smack_task_getsid,
@@ -2642,7 +2692,6 @@ struct security_operations smack_ops = {
         .task_movememory =              smack_task_movememory,
         .task_kill =                    smack_task_kill,
         .task_wait =                    smack_task_wait,
-        .task_reparent_to_init =        cap_task_reparent_to_init,
         .task_to_inode =                smack_task_to_inode,
         .task_prctl =                   cap_task_prctl,
 
@@ -2718,6 +2767,8 @@ struct security_operations smack_ops = {
  */
 static __init int smack_init(void)
 {
+        struct cred *cred;
+
         if (!security_module_enable(&smack_ops))
                 return 0;
 
@@ -2726,7 +2777,8 @@ static __init int smack_init(void)
         /*
          * Set the security state for the initial task.
          */
-        current->security = &smack_known_floor.smk_known;
+        cred = (struct cred *) current->cred;
+        cred->security = &smack_known_floor.smk_known;
 
         /*
          * Initialize locks
diff --git a/security/smack/smackfs.c b/security/smack/smackfs.c
index c21d8c8bf0c7..ca257dfdc75d 100644
--- a/security/smack/smackfs.c
+++ b/security/smack/smackfs.c
@@ -336,7 +336,7 @@ static void smk_cipso_doi(void)
 
         audit_info.loginuid = audit_get_loginuid(current);
         audit_info.sessionid = audit_get_sessionid(current);
-        audit_info.secid = smack_to_secid(current->security);
+        audit_info.secid = smack_to_secid(current_security());
 
         rc = netlbl_cfg_map_del(NULL, &audit_info);
         if (rc != 0)
@@ -371,7 +371,7 @@ static void smk_unlbl_ambient(char *oldambient)
 
         audit_info.loginuid = audit_get_loginuid(current);
         audit_info.sessionid = audit_get_sessionid(current);
-        audit_info.secid = smack_to_secid(current->security);
+        audit_info.secid = smack_to_secid(current_security());
 
         if (oldambient != NULL) {
                 rc = netlbl_cfg_map_del(oldambient, &audit_info);
@@ -843,7 +843,7 @@ static ssize_t smk_write_onlycap(struct file *file, const char __user *buf,
                                  size_t count, loff_t *ppos)
 {
         char in[SMK_LABELLEN];
-        char *sp = current->security;
+        char *sp = current->cred->security;
 
         if (!capable(CAP_MAC_ADMIN))
                 return -EPERM;