1 files changed, 326 insertions, 240 deletions

diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 4796ddd4e721..20219ef5439a 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -24,9 +24,11 @@
  */
 
 #include <linux/init.h>
+#include <linux/kd.h>
 #include <linux/kernel.h>
 #include <linux/tracehook.h>
 #include <linux/errno.h>
+#include <linux/ext2_fs.h>
 #include <linux/sched.h>
 #include <linux/security.h>
 #include <linux/xattr.h>
@@ -36,14 +38,15 @@
 #include <linux/mman.h>
 #include <linux/slab.h>
 #include <linux/pagemap.h>
+#include <linux/proc_fs.h>
 #include <linux/swap.h>
 #include <linux/spinlock.h>
 #include <linux/syscalls.h>
+#include <linux/dcache.h>
 #include <linux/file.h>
 #include <linux/fdtable.h>
 #include <linux/namei.h>
 #include <linux/mount.h>
-#include <linux/proc_fs.h>
 #include <linux/netfilter_ipv4.h>
 #include <linux/netfilter_ipv6.h>
 #include <linux/tty.h>
@@ -70,13 +73,13 @@
 #include <net/ipv6.h>
 #include <linux/hugetlb.h>
 #include <linux/personality.h>
-#include <linux/sysctl.h>
 #include <linux/audit.h>
 #include <linux/string.h>
 #include <linux/selinux.h>
 #include <linux/mutex.h>
 #include <linux/posix-timers.h>
 #include <linux/syslog.h>
+#include <linux/user_namespace.h>
 
 #include "avc.h"
 #include "objsec.h"
@@ -987,6 +990,7 @@ static void selinux_write_opts(struct seq_file *m,
                         continue;
                 default:
                         BUG();
+                        return;
                 };
                 /* we need a comma before each option */
                 seq_putc(m, ',');
@@ -1120,39 +1124,35 @@ static inline u16 socket_type_to_security_class(int family, int type, int protoc
 }
 
 #ifdef CONFIG_PROC_FS
-static int selinux_proc_get_sid(struct proc_dir_entry *de,
+static int selinux_proc_get_sid(struct dentry *dentry,
                                 u16 tclass,
                                 u32 *sid)
 {
-        int buflen, rc;
-        char *buffer, *path, *end;
+        int rc;
+        char *buffer, *path;
 
         buffer = (char *)__get_free_page(GFP_KERNEL);
         if (!buffer)
                 return -ENOMEM;
 
-        buflen = PAGE_SIZE;
-        end = buffer+buflen;
-        *--end = '\0';
-        buflen--;
-        path = end-1;
-        *path = '/';
-        while (de && de != de->parent) {
-                buflen -= de->namelen + 1;
-                if (buflen < 0)
-                        break;
-                end -= de->namelen;
-                memcpy(end, de->name, de->namelen);
-                *--end = '/';
-                path = end;
-                de = de->parent;
+        path = dentry_path_raw(dentry, buffer, PAGE_SIZE);
+        if (IS_ERR(path))
+                rc = PTR_ERR(path);
+        else {
+                /* each process gets a /proc/PID/ entry. Strip off the
+                 * PID part to get a valid selinux labeling.
+                 * e.g. /proc/1/net/rpc/nfs -> /net/rpc/nfs */
+                while (path[1] >= '0' && path[1] <= '9') {
+                        path[1] = '/';
+                        path++;
+                }
+                rc = security_genfs_sid("proc", path, tclass, sid);
         }
-        rc = security_genfs_sid("proc", path, tclass, sid);
         free_page((unsigned long)buffer);
         return rc;
 }
 #else
-static int selinux_proc_get_sid(struct proc_dir_entry *de,
+static int selinux_proc_get_sid(struct dentry *dentry,
                                 u16 tclass,
                                 u32 *sid)
 {
@@ -1300,10 +1300,8 @@ static int inode_doinit_with_dentry(struct inode *inode, struct dentry *opt_dent
 
                 /* Try to obtain a transition SID. */
                 isec->sclass = inode_mode_to_security_class(inode->i_mode);
-                rc = security_transition_sid(isec->task_sid,
-                                             sbsec->sid,
-                                             isec->sclass,
-                                             &sid);
+                rc = security_transition_sid(isec->task_sid, sbsec->sid,
+                                             isec->sclass, NULL, &sid);
                 if (rc)
                         goto out_unlock;
                 isec->sid = sid;
@@ -1316,10 +1314,9 @@ static int inode_doinit_with_dentry(struct inode *inode, struct dentry *opt_dent
                 isec->sid = sbsec->sid;
 
                 if ((sbsec->flags & SE_SBPROC) && !S_ISLNK(inode->i_mode)) {
-                        struct proc_inode *proci = PROC_I(inode);
-                        if (proci->pde) {
+                        if (opt_dentry) {
                                 isec->sclass = inode_mode_to_security_class(inode->i_mode);
-                                rc = selinux_proc_get_sid(proci->pde,
+                                rc = selinux_proc_get_sid(opt_dentry,
                                                           isec->sclass,
                                                           &sid);
                                 if (rc)
@@ -1447,11 +1444,15 @@ static int task_has_capability(struct task_struct *tsk,
                 printk(KERN_ERR
                        "SELinux:  out of range capability %d\n", cap);
                 BUG();
+                return -EINVAL;
         }
 
         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);
+        if (audit == SECURITY_CAP_AUDIT) {
+                int rc2 = avc_audit(sid, sid, sclass, av, &avd, rc, &ad, 0);
+                if (rc2)
+                        return rc2;
+        }
         return rc;
 }
 
@@ -1471,10 +1472,10 @@ static int task_has_system(struct task_struct *tsk,
 static int inode_has_perm(const struct cred *cred,
                           struct inode *inode,
                           u32 perms,
-                          struct common_audit_data *adp)
+                          struct common_audit_data *adp,
+                          unsigned flags)
 {
         struct inode_security_struct *isec;
-        struct common_audit_data ad;
         u32 sid;
 
         validate_creds(cred);
@@ -1485,30 +1486,49 @@ static int inode_has_perm(const struct cred *cred,
         sid = cred_sid(cred);
         isec = inode->i_security;
 
-        if (!adp) {
-                adp = &ad;
-                COMMON_AUDIT_DATA_INIT(&ad, FS);
-                ad.u.fs.inode = inode;
-        }
+        return avc_has_perm_flags(sid, isec->sid, isec->sclass, perms, adp, flags);
+}
 
-        return avc_has_perm(sid, isec->sid, isec->sclass, perms, adp);
+static int inode_has_perm_noadp(const struct cred *cred,
+                                struct inode *inode,
+                                u32 perms,
+                                unsigned flags)
+{
+        struct common_audit_data ad;
+
+        COMMON_AUDIT_DATA_INIT(&ad, INODE);
+        ad.u.inode = inode;
+        return inode_has_perm(cred, inode, perms, &ad, flags);
 }
 
 /* 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(const struct cred *cred,
-                                  struct vfsmount *mnt,
                                   struct dentry *dentry,
                                   u32 av)
 {
         struct inode *inode = dentry->d_inode;
         struct common_audit_data ad;
 
-        COMMON_AUDIT_DATA_INIT(&ad, FS);
-        ad.u.fs.path.mnt = mnt;
-        ad.u.fs.path.dentry = dentry;
-        return inode_has_perm(cred, inode, av, &ad);
+        COMMON_AUDIT_DATA_INIT(&ad, DENTRY);
+        ad.u.dentry = dentry;
+        return inode_has_perm(cred, inode, av, &ad, 0);
+}
+
+/* Same as inode_has_perm, but pass explicit audit data containing
+   the path to help the auditing code to more easily generate the
+   pathname if needed. */
+static inline int path_has_perm(const struct cred *cred,
+                                struct path *path,
+                                u32 av)
+{
+        struct inode *inode = path->dentry->d_inode;
+        struct common_audit_data ad;
+
+        COMMON_AUDIT_DATA_INIT(&ad, PATH);
+        ad.u.path = *path;
+        return inode_has_perm(cred, inode, av, &ad, 0);
 }
 
 /* Check whether a task can use an open file descriptor to
@@ -1529,8 +1549,8 @@ static int file_has_perm(const struct cred *cred,
         u32 sid = cred_sid(cred);
         int rc;
 
-        COMMON_AUDIT_DATA_INIT(&ad, FS);
-        ad.u.fs.path = file->f_path;
+        COMMON_AUDIT_DATA_INIT(&ad, PATH);
+        ad.u.path = file->f_path;
 
         if (sid != fsec->sid) {
                 rc = avc_has_perm(sid, fsec->sid,
@@ -1544,7 +1564,7 @@ static int file_has_perm(const struct cred *cred,
         /* av is zero if only checking access to the descriptor. */
         rc = 0;
         if (av)
-                rc = inode_has_perm(cred, inode, av, &ad);
+                rc = inode_has_perm(cred, inode, av, &ad, 0);
 
 out:
         return rc;
@@ -1568,8 +1588,8 @@ static int may_create(struct inode *dir,
         sid = tsec->sid;
         newsid = tsec->create_sid;
 
-        COMMON_AUDIT_DATA_INIT(&ad, FS);
-        ad.u.fs.path.dentry = dentry;
+        COMMON_AUDIT_DATA_INIT(&ad, DENTRY);
+        ad.u.dentry = dentry;
 
         rc = avc_has_perm(sid, dsec->sid, SECCLASS_DIR,
                           DIR__ADD_NAME | DIR__SEARCH,
@@ -1578,7 +1598,8 @@ static int may_create(struct inode *dir,
                 return rc;
 
         if (!newsid || !(sbsec->flags & SE_SBLABELSUPP)) {
-                rc = security_transition_sid(sid, dsec->sid, tclass, &newsid);
+                rc = security_transition_sid(sid, dsec->sid, tclass,
+                                             &dentry->d_name, &newsid);
                 if (rc)
                         return rc;
         }
@@ -1620,8 +1641,8 @@ static int may_link(struct inode *dir,
         dsec = dir->i_security;
         isec = dentry->d_inode->i_security;
 
-        COMMON_AUDIT_DATA_INIT(&ad, FS);
-        ad.u.fs.path.dentry = dentry;
+        COMMON_AUDIT_DATA_INIT(&ad, DENTRY);
+        ad.u.dentry = dentry;
 
         av = DIR__SEARCH;
         av |= (kind ? DIR__REMOVE_NAME : DIR__ADD_NAME);
@@ -1666,9 +1687,9 @@ static inline int may_rename(struct inode *old_dir,
         old_is_dir = S_ISDIR(old_dentry->d_inode->i_mode);
         new_dsec = new_dir->i_security;
 
-        COMMON_AUDIT_DATA_INIT(&ad, FS);
+        COMMON_AUDIT_DATA_INIT(&ad, DENTRY);
 
-        ad.u.fs.path.dentry = old_dentry;
+        ad.u.dentry = old_dentry;
         rc = avc_has_perm(sid, old_dsec->sid, SECCLASS_DIR,
                           DIR__REMOVE_NAME | DIR__SEARCH, &ad);
         if (rc)
@@ -1684,7 +1705,7 @@ static inline int may_rename(struct inode *old_dir,
                         return rc;
         }
 
-        ad.u.fs.path.dentry = new_dentry;
+        ad.u.dentry = new_dentry;
         av = DIR__ADD_NAME | DIR__SEARCH;
         if (new_dentry->d_inode)
                 av |= DIR__REMOVE_NAME;
@@ -1851,93 +1872,17 @@ static int selinux_capset(struct cred *new, const struct cred *old,
  */
 
 static int selinux_capable(struct task_struct *tsk, const struct cred *cred,
-                           int cap, int audit)
+                           struct user_namespace *ns, int cap, int audit)
 {
         int rc;
 
-        rc = cap_capable(tsk, cred, cap, audit);
+        rc = cap_capable(tsk, cred, ns, cap, audit);
         if (rc)
                 return rc;
 
         return task_has_capability(tsk, cred, cap, audit);
 }
 
-static int selinux_sysctl_get_sid(ctl_table *table, u16 tclass, u32 *sid)
-{
-        int buflen, rc;
-        char *buffer, *path, *end;
-
-        rc = -ENOMEM;
-        buffer = (char *)__get_free_page(GFP_KERNEL);
-        if (!buffer)
-                goto out;
-
-        buflen = PAGE_SIZE;
-        end = buffer+buflen;
-        *--end = '\0';
-        buflen--;
-        path = end-1;
-        *path = '/';
-        while (table) {
-                const char *name = table->procname;
-                size_t namelen = strlen(name);
-                buflen -= namelen + 1;
-                if (buflen < 0)
-                        goto out_free;
-                end -= namelen;
-                memcpy(end, name, namelen);
-                *--end = '/';
-                path = end;
-                table = table->parent;
-        }
-        buflen -= 4;
-        if (buflen < 0)
-                goto out_free;
-        end -= 4;
-        memcpy(end, "/sys", 4);
-        path = end;
-        rc = security_genfs_sid("proc", path, tclass, sid);
-out_free:
-        free_page((unsigned long)buffer);
-out:
-        return rc;
-}
-
-static int selinux_sysctl(ctl_table *table, int op)
-{
-        int error = 0;
-        u32 av;
-        u32 tsid, sid;
-        int rc;
-
-        sid = current_sid();
-
-        rc = selinux_sysctl_get_sid(table, (op == 0001) ?
-                                    SECCLASS_DIR : SECCLASS_FILE, &tsid);
-        if (rc) {
-                /* Default to the well-defined sysctl SID. */
-                tsid = SECINITSID_SYSCTL;
-        }
-
-        /* 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(sid, tsid,
-                                     SECCLASS_DIR, DIR__SEARCH, NULL);
-        } else {
-                av = 0;
-                if (op & 004)
-                        av |= FILE__READ;
-                if (op & 002)
-                        av |= FILE__WRITE;
-                if (av)
-                        error = avc_has_perm(sid, tsid,
-                                             SECCLASS_FILE, av, NULL);
-        }
-
-        return error;
-}
-
 static int selinux_quotactl(int cmds, int type, int id, struct super_block *sb)
 {
         const struct cred *cred = current_cred();
@@ -1970,17 +1915,13 @@ static int selinux_quota_on(struct dentry *dentry)
 {
         const struct cred *cred = current_cred();
 
-        return dentry_has_perm(cred, NULL, dentry, FILE__QUOTAON);
+        return dentry_has_perm(cred, dentry, FILE__QUOTAON);
 }
 
-static int selinux_syslog(int type, bool from_file)
+static int selinux_syslog(int type)
 {
         int rc;
 
-        rc = cap_syslog(type, from_file);
-        if (rc)
-                return rc;
-
         switch (type) {
         case SYSLOG_ACTION_READ_ALL:    /* Read last kernel messages */
         case SYSLOG_ACTION_SIZE_BUFFER: /* Return size of the log buffer */
@@ -2016,7 +1957,8 @@ static int selinux_vm_enough_memory(struct mm_struct *mm, long pages)
 {
         int rc, cap_sys_admin = 0;
 
-        rc = selinux_capable(current, current_cred(), CAP_SYS_ADMIN,
+        rc = selinux_capable(current, current_cred(),
+                             &init_user_ns, CAP_SYS_ADMIN,
                              SECURITY_CAP_NOAUDIT);
         if (rc == 0)
                 cap_sys_admin = 1;
@@ -2064,13 +2006,14 @@ static int selinux_bprm_set_creds(struct linux_binprm *bprm)
         } else {
                 /* Check for a default transition on this program. */
                 rc = security_transition_sid(old_tsec->sid, isec->sid,
-                                             SECCLASS_PROCESS, &new_tsec->sid);
+                                             SECCLASS_PROCESS, NULL,
+                                             &new_tsec->sid);
                 if (rc)
                         return rc;
         }
 
-        COMMON_AUDIT_DATA_INIT(&ad, FS);
-        ad.u.fs.path = bprm->file->f_path;
+        COMMON_AUDIT_DATA_INIT(&ad, PATH);
+        ad.u.path = bprm->file->f_path;
 
         if (bprm->file->f_path.mnt->mnt_flags & MNT_NOSUID)
                 new_tsec->sid = old_tsec->sid;
@@ -2184,8 +2127,8 @@ static inline void flush_unauthorized_files(const struct cred *cred,
                                                 struct tty_file_private, list);
                         file = file_priv->file;
                         inode = file->f_path.dentry->d_inode;
-                        if (inode_has_perm(cred, inode,
-                                           FILE__READ | FILE__WRITE, NULL)) {
+                        if (inode_has_perm_noadp(cred, inode,
+                                           FILE__READ | FILE__WRITE, 0)) {
                                 drop_tty = 1;
                         }
                 }
@@ -2198,7 +2141,7 @@ static inline void flush_unauthorized_files(const struct cred *cred,
 
         /* Revalidate access to inherited open files. */
 
-        COMMON_AUDIT_DATA_INIT(&ad, FS);
+        COMMON_AUDIT_DATA_INIT(&ad, INODE);
 
         spin_lock(&files->file_lock);
         for (;;) {
@@ -2447,6 +2390,91 @@ out:
         return rc;
 }
 
+static int selinux_sb_remount(struct super_block *sb, void *data)
+{
+        int rc, i, *flags;
+        struct security_mnt_opts opts;
+        char *secdata, **mount_options;
+        struct superblock_security_struct *sbsec = sb->s_security;
+
+        if (!(sbsec->flags & SE_SBINITIALIZED))
+                return 0;
+
+        if (!data)
+                return 0;
+
+        if (sb->s_type->fs_flags & FS_BINARY_MOUNTDATA)
+                return 0;
+
+        security_init_mnt_opts(&opts);
+        secdata = alloc_secdata();
+        if (!secdata)
+                return -ENOMEM;
+        rc = selinux_sb_copy_data(data, secdata);
+        if (rc)
+                goto out_free_secdata;
+
+        rc = selinux_parse_opts_str(secdata, &opts);
+        if (rc)
+                goto out_free_secdata;
+
+        mount_options = opts.mnt_opts;
+        flags = opts.mnt_opts_flags;
+
+        for (i = 0; i < opts.num_mnt_opts; i++) {
+                u32 sid;
+                size_t len;
+
+                if (flags[i] == SE_SBLABELSUPP)
+                        continue;
+                len = strlen(mount_options[i]);
+                rc = security_context_to_sid(mount_options[i], len, &sid);
+                if (rc) {
+                        printk(KERN_WARNING "SELinux: security_context_to_sid"
+                               "(%s) failed for (dev %s, type %s) errno=%d\n",
+                               mount_options[i], sb->s_id, sb->s_type->name, rc);
+                        goto out_free_opts;
+                }
+                rc = -EINVAL;
+                switch (flags[i]) {
+                case FSCONTEXT_MNT:
+                        if (bad_option(sbsec, FSCONTEXT_MNT, sbsec->sid, sid))
+                                goto out_bad_option;
+                        break;
+                case CONTEXT_MNT:
+                        if (bad_option(sbsec, CONTEXT_MNT, sbsec->mntpoint_sid, sid))
+                                goto out_bad_option;
+                        break;
+                case ROOTCONTEXT_MNT: {
+                        struct inode_security_struct *root_isec;
+                        root_isec = sb->s_root->d_inode->i_security;
+
+                        if (bad_option(sbsec, ROOTCONTEXT_MNT, root_isec->sid, sid))
+                                goto out_bad_option;
+                        break;
+                }
+                case DEFCONTEXT_MNT:
+                        if (bad_option(sbsec, DEFCONTEXT_MNT, sbsec->def_sid, sid))
+                                goto out_bad_option;
+                        break;
+                default:
+                        goto out_free_opts;
+                }
+        }
+
+        rc = 0;
+out_free_opts:
+        security_free_mnt_opts(&opts);
+out_free_secdata:
+        free_secdata(secdata);
+        return rc;
+out_bad_option:
+        printk(KERN_WARNING "SELinux: unable to change security options "
+               "during remount (dev %s, type=%s)\n", sb->s_id,
+               sb->s_type->name);
+        goto out_free_opts;
+}
+
 static int selinux_sb_kern_mount(struct super_block *sb, int flags, void *data)
 {
         const struct cred *cred = current_cred();
@@ -2461,8 +2489,8 @@ static int selinux_sb_kern_mount(struct super_block *sb, int flags, void *data)
         if (flags & MS_KERNMOUNT)
                 return 0;
 
-        COMMON_AUDIT_DATA_INIT(&ad, FS);
-        ad.u.fs.path.dentry = sb->s_root;
+        COMMON_AUDIT_DATA_INIT(&ad, DENTRY);
+        ad.u.dentry = sb->s_root;
         return superblock_has_perm(cred, sb, FILESYSTEM__MOUNT, &ad);
 }
 
@@ -2471,8 +2499,8 @@ static int selinux_sb_statfs(struct dentry *dentry)
         const struct cred *cred = current_cred();
         struct common_audit_data ad;
 
-        COMMON_AUDIT_DATA_INIT(&ad, FS);
-        ad.u.fs.path.dentry = dentry->d_sb->s_root;
+        COMMON_AUDIT_DATA_INIT(&ad, DENTRY);
+        ad.u.dentry = dentry->d_sb->s_root;
         return superblock_has_perm(cred, dentry->d_sb, FILESYSTEM__GETATTR, &ad);
 }
 
@@ -2488,8 +2516,7 @@ static int selinux_mount(char *dev_name,
                 return superblock_has_perm(cred, path->mnt->mnt_sb,
                                            FILESYSTEM__REMOUNT, NULL);
         else
-                return dentry_has_perm(cred, path->mnt, path->dentry,
-                                       FILE__MOUNTON);
+                return path_has_perm(cred, path, FILE__MOUNTON);
 }
 
 static int selinux_umount(struct vfsmount *mnt, int flags)
@@ -2513,8 +2540,8 @@ static void selinux_inode_free_security(struct inode *inode)
 }
 
 static int selinux_inode_init_security(struct inode *inode, struct inode *dir,
-                                       char **name, void **value,
-                                       size_t *len)
+                                       const struct qstr *qstr, char **name,
+                                       void **value, size_t *len)
 {
         const struct task_security_struct *tsec = current_security();
         struct inode_security_struct *dsec;
@@ -2529,10 +2556,13 @@ static int selinux_inode_init_security(struct inode *inode, struct inode *dir,
         sid = tsec->sid;
         newsid = tsec->create_sid;
 
-        if (!newsid || !(sbsec->flags & SE_SBLABELSUPP)) {
+        if ((sbsec->flags & SE_SBINITIALIZED) &&
+            (sbsec->behavior == SECURITY_FS_USE_MNTPOINT))
+                newsid = sbsec->mntpoint_sid;
+        else if (!newsid || !(sbsec->flags & SE_SBLABELSUPP)) {
                 rc = security_transition_sid(sid, dsec->sid,
                                              inode_mode_to_security_class(inode->i_mode),
-                                             &newsid);
+                                             qstr, &newsid);
                 if (rc) {
                         printk(KERN_WARNING "%s:  "
                                "security_transition_sid failed, rc=%d (dev=%s "
@@ -2619,17 +2649,17 @@ static int selinux_inode_readlink(struct dentry *dentry)
 {
         const struct cred *cred = current_cred();
 
-        return dentry_has_perm(cred, NULL, dentry, FILE__READ);
+        return dentry_has_perm(cred, dentry, FILE__READ);
 }
 
 static int selinux_inode_follow_link(struct dentry *dentry, struct nameidata *nameidata)
 {
         const struct cred *cred = current_cred();
 
-        return dentry_has_perm(cred, NULL, dentry, FILE__READ);
+        return dentry_has_perm(cred, dentry, FILE__READ);
 }
 
-static int selinux_inode_permission(struct inode *inode, int mask)
+static int selinux_inode_permission(struct inode *inode, int mask, unsigned flags)
 {
         const struct cred *cred = current_cred();
         struct common_audit_data ad;
@@ -2643,15 +2673,15 @@ static int selinux_inode_permission(struct inode *inode, int mask)
         if (!mask)
                 return 0;
 
-        COMMON_AUDIT_DATA_INIT(&ad, FS);
-        ad.u.fs.inode = inode;
+        COMMON_AUDIT_DATA_INIT(&ad, INODE);
+        ad.u.inode = inode;
 
         if (from_access)
                 ad.selinux_audit_data.auditdeny |= FILE__AUDIT_ACCESS;
 
         perms = file_mask_to_av(inode->i_mode, mask);
 
-        return inode_has_perm(cred, inode, perms, &ad);
+        return inode_has_perm(cred, inode, perms, &ad, flags);
 }
 
 static int selinux_inode_setattr(struct dentry *dentry, struct iattr *iattr)
@@ -2669,16 +2699,20 @@ static int selinux_inode_setattr(struct dentry *dentry, struct iattr *iattr)
 
         if (ia_valid & (ATTR_MODE | ATTR_UID | ATTR_GID |
                         ATTR_ATIME_SET | ATTR_MTIME_SET | ATTR_TIMES_SET))
-                return dentry_has_perm(cred, NULL, dentry, FILE__SETATTR);
+                return dentry_has_perm(cred, dentry, FILE__SETATTR);
 
-        return dentry_has_perm(cred, NULL, dentry, FILE__WRITE);
+        return dentry_has_perm(cred, dentry, FILE__WRITE);
 }
 
 static int selinux_inode_getattr(struct vfsmount *mnt, struct dentry *dentry)
 {
         const struct cred *cred = current_cred();
+        struct path path;
+
+        path.dentry = dentry;
+        path.mnt = mnt;
 
-        return dentry_has_perm(cred, mnt, dentry, FILE__GETATTR);
+        return path_has_perm(cred, &path, FILE__GETATTR);
 }
 
 static int selinux_inode_setotherxattr(struct dentry *dentry, const char *name)
@@ -2699,7 +2733,7 @@ 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(cred, NULL, dentry, FILE__SETATTR);
+        return dentry_has_perm(cred, dentry, FILE__SETATTR);
 }
 
 static int selinux_inode_setxattr(struct dentry *dentry, const char *name,
@@ -2719,11 +2753,11 @@ static int selinux_inode_setxattr(struct dentry *dentry, const char *name,
         if (!(sbsec->flags & SE_SBLABELSUPP))
                 return -EOPNOTSUPP;
 
-        if (!is_owner_or_cap(inode))
+        if (!inode_owner_or_capable(inode))
                 return -EPERM;
 
-        COMMON_AUDIT_DATA_INIT(&ad, FS);
-        ad.u.fs.path.dentry = dentry;
+        COMMON_AUDIT_DATA_INIT(&ad, DENTRY);
+        ad.u.dentry = dentry;
 
         rc = avc_has_perm(sid, isec->sid, isec->sclass,
                           FILE__RELABELFROM, &ad);
@@ -2786,14 +2820,14 @@ static int selinux_inode_getxattr(struct dentry *dentry, const char *name)
 {
         const struct cred *cred = current_cred();
 
-        return dentry_has_perm(cred, NULL, dentry, FILE__GETATTR);
+        return dentry_has_perm(cred, dentry, FILE__GETATTR);
 }
 
 static int selinux_inode_listxattr(struct dentry *dentry)
 {
         const struct cred *cred = current_cred();
 
-        return dentry_has_perm(cred, NULL, dentry, FILE__GETATTR);
+        return dentry_has_perm(cred, dentry, FILE__GETATTR);
 }
 
 static int selinux_inode_removexattr(struct dentry *dentry, const char *name)
@@ -2830,7 +2864,8 @@ 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 = selinux_capable(current, current_cred(), CAP_MAC_ADMIN,
+        error = selinux_capable(current, current_cred(),
+                                &init_user_ns, CAP_MAC_ADMIN,
                                 SECURITY_CAP_NOAUDIT);
         if (!error)
                 error = security_sid_to_context_force(isec->sid, &context,
@@ -2933,16 +2968,47 @@ static int selinux_file_ioctl(struct file *file, unsigned int cmd,
                               unsigned long arg)
 {
         const struct cred *cred = current_cred();
-        u32 av = 0;
+        int error = 0;
 
-        if (_IOC_DIR(cmd) & _IOC_WRITE)
-                av |= FILE__WRITE;
-        if (_IOC_DIR(cmd) & _IOC_READ)
-                av |= FILE__READ;
-        if (!av)
-                av = FILE__IOCTL;
+        switch (cmd) {
+        case FIONREAD:
+        /* fall through */
+        case FIBMAP:
+        /* fall through */
+        case FIGETBSZ:
+        /* fall through */
+        case EXT2_IOC_GETFLAGS:
+        /* fall through */
+        case EXT2_IOC_GETVERSION:
+                error = file_has_perm(cred, file, FILE__GETATTR);
+                break;
 
-        return file_has_perm(cred, file, av);
+        case EXT2_IOC_SETFLAGS:
+        /* fall through */
+        case EXT2_IOC_SETVERSION:
+                error = file_has_perm(cred, file, FILE__SETATTR);
+                break;
+
+        /* sys_ioctl() checks */
+        case FIONBIO:
+        /* fall through */
+        case FIOASYNC:
+                error = file_has_perm(cred, file, 0);
+                break;
+
+        case KDSKBENT:
+        case KDSKBSENT:
+                error = task_has_capability(current, cred, CAP_SYS_TTY_CONFIG,
+                                        SECURITY_CAP_AUDIT);
+                break;
+
+        /* default case assumes that the command will go
+         * to the file's ioctl() function.
+         */
+        default:
+                error = file_has_perm(cred, file, FILE__IOCTL);
+        }
+        return error;
 }
 
 static int default_noexec;
@@ -3167,7 +3233,7 @@ static int selinux_dentry_open(struct file *file, const struct cred *cred)
          * new inode label or new policy.
          * This check is not redundant - do not remove.
          */
-        return inode_has_perm(cred, inode, open_file_to_av(file), NULL);
+        return inode_has_perm_noadp(cred, inode, open_file_to_av(file), 0);
 }
 
 /* task security operations */
@@ -3199,7 +3265,11 @@ static void selinux_cred_free(struct cred *cred)
 {
         struct task_security_struct *tsec = cred->security;
 
-        BUG_ON((unsigned long) cred->security < PAGE_SIZE);
+        /*
+         * cred->security == NULL if security_cred_alloc_blank() or
+         * security_prepare_creds() returned an error.
+         */
+        BUG_ON(cred->security && (unsigned long) cred->security < PAGE_SIZE);
         cred->security = (void *) 0x7UL;
         kfree(tsec);
 }
@@ -3354,11 +3424,11 @@ static int selinux_task_setrlimit(struct task_struct *p, unsigned int resource,
         return 0;
 }
 
-static int selinux_task_setscheduler(struct task_struct *p, int policy, struct sched_param *lp)
+static int selinux_task_setscheduler(struct task_struct *p)
 {
         int rc;
 
-        rc = cap_task_setscheduler(p, policy, lp);
+        rc = cap_task_setscheduler(p);
         if (rc)
                 return rc;
 
@@ -3641,9 +3711,16 @@ static int selinux_skb_peerlbl_sid(struct sk_buff *skb, u16 family, u32 *sid)
 
 /* socket security operations */
 
-static u32 socket_sockcreate_sid(const struct task_security_struct *tsec)
+static int socket_sockcreate_sid(const struct task_security_struct *tsec,
+                                 u16 secclass, u32 *socksid)
 {
-        return tsec->sockcreate_sid ? : tsec->sid;
+        if (tsec->sockcreate_sid > SECSID_NULL) {
+                *socksid = tsec->sockcreate_sid;
+                return 0;
+        }
+
+        return security_transition_sid(tsec->sid, tsec->sid, secclass, NULL,
+                                       socksid);
 }
 
 static int sock_has_perm(struct task_struct *task, struct sock *sk, u32 perms)
@@ -3667,12 +3744,16 @@ static int selinux_socket_create(int family, int type,
         const struct task_security_struct *tsec = current_security();
         u32 newsid;
         u16 secclass;
+        int rc;
 
         if (kern)
                 return 0;
 
-        newsid = socket_sockcreate_sid(tsec);
         secclass = socket_type_to_security_class(family, type, protocol);
+        rc = socket_sockcreate_sid(tsec, secclass, &newsid);
+        if (rc)
+                return rc;
+
         return avc_has_perm(tsec->sid, newsid, secclass, SOCKET__CREATE, NULL);
 }
 
@@ -3684,12 +3765,16 @@ static int selinux_socket_post_create(struct socket *sock, int family,
         struct sk_security_struct *sksec;
         int err = 0;
 
+        isec->sclass = socket_type_to_security_class(family, type, protocol);
+
         if (kern)
                 isec->sid = SECINITSID_KERNEL;
-        else
-                isec->sid = socket_sockcreate_sid(tsec);
+        else {
+                err = socket_sockcreate_sid(tsec, isec->sclass, &(isec->sid));
+                if (err)
+                        return err;
+        }
 
-        isec->sclass = socket_type_to_security_class(family, type, protocol);
         isec->initialized = 1;
 
         if (sock->sk) {
@@ -3925,18 +4010,18 @@ static int selinux_socket_shutdown(struct socket *sock, int how)
         return sock_has_perm(current, sock->sk, SOCKET__SHUTDOWN);
 }
 
-static int selinux_socket_unix_stream_connect(struct socket *sock,
-                                              struct socket *other,
+static int selinux_socket_unix_stream_connect(struct sock *sock,
+                                              struct sock *other,
                                               struct sock *newsk)
 {
-        struct sk_security_struct *sksec_sock = sock->sk->sk_security;
-        struct sk_security_struct *sksec_other = other->sk->sk_security;
+        struct sk_security_struct *sksec_sock = sock->sk_security;
+        struct sk_security_struct *sksec_other = other->sk_security;
         struct sk_security_struct *sksec_new = newsk->sk_security;
         struct common_audit_data ad;
         int err;
 
         COMMON_AUDIT_DATA_INIT(&ad, NET);
-        ad.u.net.sk = other->sk;
+        ad.u.net.sk = other;
 
         err = avc_has_perm(sksec_sock->sid, sksec_other->sid,
                            sksec_other->sclass,
@@ -3999,7 +4084,6 @@ static int selinux_sock_rcv_skb_compat(struct sock *sk, struct sk_buff *skb,
 {
         int err = 0;
         struct sk_security_struct *sksec = sk->sk_security;
-        u32 peer_sid;
         u32 sk_sid = sksec->sid;
         struct common_audit_data ad;
         char *addrp;
@@ -4018,20 +4102,10 @@ static int selinux_sock_rcv_skb_compat(struct sock *sk, struct sk_buff *skb,
                         return err;
         }
 
-        if (selinux_policycap_netpeer) {
-                err = selinux_skb_peerlbl_sid(skb, family, &peer_sid);
-                if (err)
-                        return err;
-                err = avc_has_perm(sk_sid, peer_sid,
-                                   SECCLASS_PEER, PEER__RECV, &ad);
-                if (err)
-                        selinux_netlbl_err(skb, err, 0);
-        } else {
-                err = selinux_netlbl_sock_rcv_skb(sksec, skb, family, &ad);
-                if (err)
-                        return err;
-                err = selinux_xfrm_sock_rcv_skb(sksec->sid, skb, &ad);
-        }
+        err = selinux_netlbl_sock_rcv_skb(sksec, skb, family, &ad);
+        if (err)
+                return err;
+        err = selinux_xfrm_sock_rcv_skb(sksec->sid, skb, &ad);
 
         return err;
 }
@@ -4279,10 +4353,31 @@ static void selinux_inet_conn_established(struct sock *sk, struct sk_buff *skb)
         selinux_skb_peerlbl_sid(skb, family, &sksec->peer_sid);
 }
 
+static int selinux_secmark_relabel_packet(u32 sid)
+{
+        const struct task_security_struct *__tsec;
+        u32 tsid;
+
+        __tsec = current_security();
+        tsid = __tsec->sid;
+
+        return avc_has_perm(tsid, sid, SECCLASS_PACKET, PACKET__RELABELTO, NULL);
+}
+
+static void selinux_secmark_refcount_inc(void)
+{
+        atomic_inc(&selinux_secmark_refcount);
+}
+
+static void selinux_secmark_refcount_dec(void)
+{
+        atomic_dec(&selinux_secmark_refcount);
+}
+
 static void selinux_req_classify_flow(const struct request_sock *req,
                                       struct flowi *fl)
 {
-        fl->secid = req->secid;
+        fl->flowi_secid = req->secid;
 }
 
 static int selinux_tun_dev_create(void)
@@ -4503,11 +4598,10 @@ static unsigned int selinux_ip_postroute_compat(struct sk_buff *skb,
         if (selinux_secmark_enabled())
                 if (avc_has_perm(sksec->sid, skb->secmark,
                                  SECCLASS_PACKET, PACKET__SEND, &ad))
-                        return NF_DROP;
+                        return NF_DROP_ERR(-ECONNREFUSED);
 
-        if (selinux_policycap_netpeer)
-                if (selinux_xfrm_postroute_last(sksec->sid, skb, &ad, proto))
-                        return NF_DROP;
+        if (selinux_xfrm_postroute_last(sksec->sid, skb, &ad, proto))
+                return NF_DROP_ERR(-ECONNREFUSED);
 
         return NF_ACCEPT;
 }
@@ -4550,27 +4644,14 @@ static unsigned int selinux_ip_postroute(struct sk_buff *skb, int ifindex,
          * from the sending socket, otherwise use the kernel's sid */
         sk = skb->sk;
         if (sk == NULL) {
-                switch (family) {
-                case PF_INET:
-                        if (IPCB(skb)->flags & IPSKB_FORWARDED)
-                                secmark_perm = PACKET__FORWARD_OUT;
-                        else
-                                secmark_perm = PACKET__SEND;
-                        break;
-                case PF_INET6:
-                        if (IP6CB(skb)->flags & IP6SKB_FORWARDED)
-                                secmark_perm = PACKET__FORWARD_OUT;
-                        else
-                                secmark_perm = PACKET__SEND;
-                        break;
-                default:
-                        return NF_DROP;
-                }
-                if (secmark_perm == PACKET__FORWARD_OUT) {
+                if (skb->skb_iif) {
+                        secmark_perm = PACKET__FORWARD_OUT;
                         if (selinux_skb_peerlbl_sid(skb, family, &peer_sid))
                                 return NF_DROP;
-                } else
+                } else {
+                        secmark_perm = PACKET__SEND;
                         peer_sid = SECINITSID_KERNEL;
+                }
         } else {
                 struct sk_security_struct *sksec = sk->sk_security;
                 peer_sid = sksec->sid;
@@ -4586,7 +4667,7 @@ static unsigned int selinux_ip_postroute(struct sk_buff *skb, int ifindex,
         if (secmark_active)
                 if (avc_has_perm(peer_sid, skb->secmark,
                                  SECCLASS_PACKET, secmark_perm, &ad))
-                        return NF_DROP;
+                        return NF_DROP_ERR(-ECONNREFUSED);
 
         if (peerlbl_active) {
                 u32 if_sid;
@@ -4596,13 +4677,13 @@ static unsigned int selinux_ip_postroute(struct sk_buff *skb, int ifindex,
                         return NF_DROP;
                 if (avc_has_perm(peer_sid, if_sid,
                                  SECCLASS_NETIF, NETIF__EGRESS, &ad))
-                        return NF_DROP;
+                        return NF_DROP_ERR(-ECONNREFUSED);
 
                 if (sel_netnode_sid(addrp, family, &node_sid))
                         return NF_DROP;
                 if (avc_has_perm(peer_sid, node_sid,
                                  SECCLASS_NODE, NODE__SENDTO, &ad))
-                        return NF_DROP;
+                        return NF_DROP_ERR(-ECONNREFUSED);
         }
 
         return NF_ACCEPT;
@@ -4645,6 +4726,7 @@ static int selinux_netlink_recv(struct sk_buff *skb, int capability)
 {
         int err;
         struct common_audit_data ad;
+        u32 sid;
 
         err = cap_netlink_recv(skb, capability);
         if (err)
@@ -4653,8 +4735,9 @@ static int selinux_netlink_recv(struct sk_buff *skb, int capability)
         COMMON_AUDIT_DATA_INIT(&ad, CAP);
         ad.u.cap = capability;
 
-        return avc_has_perm(NETLINK_CB(skb).sid, NETLINK_CB(skb).sid,
-                            SECCLASS_CAPABILITY, CAP_TO_MASK(capability), &ad);
+        security_task_getsecid(current, &sid);
+        return avc_has_perm(sid, sid, SECCLASS_CAPABILITY,
+                            CAP_TO_MASK(capability), &ad);
 }
 
 static int ipc_alloc_security(struct task_struct *task,
@@ -4824,7 +4907,7 @@ static int selinux_msg_queue_msgsnd(struct msg_queue *msq, struct msg_msg *msg,
                  * message queue this message will be stored in
                  */
                 rc = security_transition_sid(sid, isec->sid, SECCLASS_MSG,
-                                             &msec->sid);
+                                             NULL, &msec->sid);
                 if (rc)
                         return rc;
         }
@@ -5378,7 +5461,6 @@ static struct security_operations selinux_ops = {
         .ptrace_traceme =               selinux_ptrace_traceme,
         .capget =                       selinux_capget,
         .capset =                       selinux_capset,
-        .sysctl =                       selinux_sysctl,
         .capable =                      selinux_capable,
         .quotactl =                     selinux_quotactl,
         .quota_on =                     selinux_quota_on,
@@ -5396,6 +5478,7 @@ static struct security_operations selinux_ops = {
         .sb_alloc_security =            selinux_sb_alloc_security,
         .sb_free_security =             selinux_sb_free_security,
         .sb_copy_data =                 selinux_sb_copy_data,
+        .sb_remount =                   selinux_sb_remount,
         .sb_kern_mount =                selinux_sb_kern_mount,
         .sb_show_options =              selinux_sb_show_options,
         .sb_statfs =                    selinux_sb_statfs,
@@ -5533,6 +5616,9 @@ static struct security_operations selinux_ops = {
         .inet_conn_request =            selinux_inet_conn_request,
         .inet_csk_clone =               selinux_inet_csk_clone,
         .inet_conn_established =        selinux_inet_conn_established,
+        .secmark_relabel_packet =       selinux_secmark_relabel_packet,
+        .secmark_refcount_inc =         selinux_secmark_refcount_inc,
+        .secmark_refcount_dec =         selinux_secmark_refcount_dec,
         .req_classify_flow =            selinux_req_classify_flow,
         .tun_dev_create =               selinux_tun_dev_create,
         .tun_dev_post_create =          selinux_tun_dev_post_create,