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-rw-r--r--fs/namespace.c14
-rw-r--r--fs/proc/base.c9
-rw-r--r--fs/proc/task_mmu.c6
-rw-r--r--fs/proc/task_nommu.c2
-rw-r--r--include/linux/ptrace.h8
-rw-r--r--include/linux/security.h49
-rw-r--r--kernel/ptrace.c15
-rw-r--r--security/Kconfig10
-rw-r--r--security/Makefile11
-rw-r--r--security/capability.c1043
-rw-r--r--security/commoncap.c3
-rw-r--r--security/dummy.c1251
-rw-r--r--security/root_plug.c9
-rw-r--r--security/security.c66
-rw-r--r--security/selinux/hooks.c244
-rw-r--r--security/selinux/include/audit.h4
-rw-r--r--security/selinux/include/avc.h15
-rw-r--r--security/selinux/include/objsec.h1
-rw-r--r--security/selinux/include/security.h7
-rw-r--r--security/selinux/netnode.c1
-rw-r--r--security/selinux/netport.c3
-rw-r--r--security/selinux/selinuxfs.c15
-rw-r--r--security/selinux/ss/avtab.c2
-rw-r--r--security/selinux/ss/context.h27
-rw-r--r--security/selinux/ss/mls.c19
-rw-r--r--security/selinux/ss/mls.h3
-rw-r--r--security/selinux/ss/policydb.c15
-rw-r--r--security/selinux/ss/services.c450
-rw-r--r--security/selinux/ss/sidtab.c76
-rw-r--r--security/selinux/ss/sidtab.h7
-rw-r--r--security/smack/smack_lsm.c28
31 files changed, 1589 insertions, 1824 deletions
diff --git a/fs/namespace.c b/fs/namespace.c
index 4fc302c2a0e0..4f6f7635b59c 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -750,7 +750,7 @@ struct proc_fs_info {
750 const char *str; 750 const char *str;
751}; 751};
752 752
753static void show_sb_opts(struct seq_file *m, struct super_block *sb) 753static int show_sb_opts(struct seq_file *m, struct super_block *sb)
754{ 754{
755 static const struct proc_fs_info fs_info[] = { 755 static const struct proc_fs_info fs_info[] = {
756 { MS_SYNCHRONOUS, ",sync" }, 756 { MS_SYNCHRONOUS, ",sync" },
@@ -764,6 +764,8 @@ static void show_sb_opts(struct seq_file *m, struct super_block *sb)
764 if (sb->s_flags & fs_infop->flag) 764 if (sb->s_flags & fs_infop->flag)
765 seq_puts(m, fs_infop->str); 765 seq_puts(m, fs_infop->str);
766 } 766 }
767
768 return security_sb_show_options(m, sb);
767} 769}
768 770
769static void show_mnt_opts(struct seq_file *m, struct vfsmount *mnt) 771static void show_mnt_opts(struct seq_file *m, struct vfsmount *mnt)
@@ -806,11 +808,14 @@ static int show_vfsmnt(struct seq_file *m, void *v)
806 seq_putc(m, ' '); 808 seq_putc(m, ' ');
807 show_type(m, mnt->mnt_sb); 809 show_type(m, mnt->mnt_sb);
808 seq_puts(m, __mnt_is_readonly(mnt) ? " ro" : " rw"); 810 seq_puts(m, __mnt_is_readonly(mnt) ? " ro" : " rw");
809 show_sb_opts(m, mnt->mnt_sb); 811 err = show_sb_opts(m, mnt->mnt_sb);
812 if (err)
813 goto out;
810 show_mnt_opts(m, mnt); 814 show_mnt_opts(m, mnt);
811 if (mnt->mnt_sb->s_op->show_options) 815 if (mnt->mnt_sb->s_op->show_options)
812 err = mnt->mnt_sb->s_op->show_options(m, mnt); 816 err = mnt->mnt_sb->s_op->show_options(m, mnt);
813 seq_puts(m, " 0 0\n"); 817 seq_puts(m, " 0 0\n");
818out:
814 return err; 819 return err;
815} 820}
816 821
@@ -865,10 +870,13 @@ static int show_mountinfo(struct seq_file *m, void *v)
865 seq_putc(m, ' '); 870 seq_putc(m, ' ');
866 mangle(m, mnt->mnt_devname ? mnt->mnt_devname : "none"); 871 mangle(m, mnt->mnt_devname ? mnt->mnt_devname : "none");
867 seq_puts(m, sb->s_flags & MS_RDONLY ? " ro" : " rw"); 872 seq_puts(m, sb->s_flags & MS_RDONLY ? " ro" : " rw");
868 show_sb_opts(m, sb); 873 err = show_sb_opts(m, sb);
874 if (err)
875 goto out;
869 if (sb->s_op->show_options) 876 if (sb->s_op->show_options)
870 err = sb->s_op->show_options(m, mnt); 877 err = sb->s_op->show_options(m, mnt);
871 seq_putc(m, '\n'); 878 seq_putc(m, '\n');
879out:
872 return err; 880 return err;
873} 881}
874 882
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 3b455371e7ff..58c3e6a8e15e 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -233,7 +233,7 @@ static int check_mem_permission(struct task_struct *task)
233 */ 233 */
234 if (task->parent == current && (task->ptrace & PT_PTRACED) && 234 if (task->parent == current && (task->ptrace & PT_PTRACED) &&
235 task_is_stopped_or_traced(task) && 235 task_is_stopped_or_traced(task) &&
236 ptrace_may_attach(task)) 236 ptrace_may_access(task, PTRACE_MODE_ATTACH))
237 return 0; 237 return 0;
238 238
239 /* 239 /*
@@ -251,7 +251,8 @@ struct mm_struct *mm_for_maps(struct task_struct *task)
251 task_lock(task); 251 task_lock(task);
252 if (task->mm != mm) 252 if (task->mm != mm)
253 goto out; 253 goto out;
254 if (task->mm != current->mm && __ptrace_may_attach(task) < 0) 254 if (task->mm != current->mm &&
255 __ptrace_may_access(task, PTRACE_MODE_READ) < 0)
255 goto out; 256 goto out;
256 task_unlock(task); 257 task_unlock(task);
257 return mm; 258 return mm;
@@ -518,7 +519,7 @@ static int proc_fd_access_allowed(struct inode *inode)
518 */ 519 */
519 task = get_proc_task(inode); 520 task = get_proc_task(inode);
520 if (task) { 521 if (task) {
521 allowed = ptrace_may_attach(task); 522 allowed = ptrace_may_access(task, PTRACE_MODE_READ);
522 put_task_struct(task); 523 put_task_struct(task);
523 } 524 }
524 return allowed; 525 return allowed;
@@ -904,7 +905,7 @@ static ssize_t environ_read(struct file *file, char __user *buf,
904 if (!task) 905 if (!task)
905 goto out_no_task; 906 goto out_no_task;
906 907
907 if (!ptrace_may_attach(task)) 908 if (!ptrace_may_access(task, PTRACE_MODE_READ))
908 goto out; 909 goto out;
909 910
910 ret = -ENOMEM; 911 ret = -ENOMEM;
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index c492449f3b45..164bd9f9ede3 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -210,7 +210,7 @@ static int show_map(struct seq_file *m, void *v)
210 dev_t dev = 0; 210 dev_t dev = 0;
211 int len; 211 int len;
212 212
213 if (maps_protect && !ptrace_may_attach(task)) 213 if (maps_protect && !ptrace_may_access(task, PTRACE_MODE_READ))
214 return -EACCES; 214 return -EACCES;
215 215
216 if (file) { 216 if (file) {
@@ -646,7 +646,7 @@ static ssize_t pagemap_read(struct file *file, char __user *buf,
646 goto out; 646 goto out;
647 647
648 ret = -EACCES; 648 ret = -EACCES;
649 if (!ptrace_may_attach(task)) 649 if (!ptrace_may_access(task, PTRACE_MODE_READ))
650 goto out_task; 650 goto out_task;
651 651
652 ret = -EINVAL; 652 ret = -EINVAL;
@@ -747,7 +747,7 @@ static int show_numa_map_checked(struct seq_file *m, void *v)
747 struct proc_maps_private *priv = m->private; 747 struct proc_maps_private *priv = m->private;
748 struct task_struct *task = priv->task; 748 struct task_struct *task = priv->task;
749 749
750 if (maps_protect && !ptrace_may_attach(task)) 750 if (maps_protect && !ptrace_may_access(task, PTRACE_MODE_READ))
751 return -EACCES; 751 return -EACCES;
752 752
753 return show_numa_map(m, v); 753 return show_numa_map(m, v);
diff --git a/fs/proc/task_nommu.c b/fs/proc/task_nommu.c
index 4b4f9cc2f186..5d84e7121df8 100644
--- a/fs/proc/task_nommu.c
+++ b/fs/proc/task_nommu.c
@@ -113,7 +113,7 @@ static int show_map(struct seq_file *m, void *_vml)
113 struct proc_maps_private *priv = m->private; 113 struct proc_maps_private *priv = m->private;
114 struct task_struct *task = priv->task; 114 struct task_struct *task = priv->task;
115 115
116 if (maps_protect && !ptrace_may_attach(task)) 116 if (maps_protect && !ptrace_may_access(task, PTRACE_MODE_READ))
117 return -EACCES; 117 return -EACCES;
118 118
119 return nommu_vma_show(m, vml->vma); 119 return nommu_vma_show(m, vml->vma);
diff --git a/include/linux/ptrace.h b/include/linux/ptrace.h
index f98501ba557e..c6f5f9dd0cee 100644
--- a/include/linux/ptrace.h
+++ b/include/linux/ptrace.h
@@ -95,8 +95,12 @@ extern void __ptrace_link(struct task_struct *child,
95 struct task_struct *new_parent); 95 struct task_struct *new_parent);
96extern void __ptrace_unlink(struct task_struct *child); 96extern void __ptrace_unlink(struct task_struct *child);
97extern void ptrace_untrace(struct task_struct *child); 97extern void ptrace_untrace(struct task_struct *child);
98extern int ptrace_may_attach(struct task_struct *task); 98#define PTRACE_MODE_READ 1
99extern int __ptrace_may_attach(struct task_struct *task); 99#define PTRACE_MODE_ATTACH 2
100/* Returns 0 on success, -errno on denial. */
101extern int __ptrace_may_access(struct task_struct *task, unsigned int mode);
102/* Returns true on success, false on denial. */
103extern bool ptrace_may_access(struct task_struct *task, unsigned int mode);
100 104
101static inline int ptrace_reparented(struct task_struct *child) 105static inline int ptrace_reparented(struct task_struct *child)
102{ 106{
diff --git a/include/linux/security.h b/include/linux/security.h
index 50737c70e78e..31c8851ec5d0 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -46,7 +46,8 @@ struct audit_krule;
46 */ 46 */
47extern int cap_capable(struct task_struct *tsk, int cap); 47extern int cap_capable(struct task_struct *tsk, int cap);
48extern int cap_settime(struct timespec *ts, struct timezone *tz); 48extern int cap_settime(struct timespec *ts, struct timezone *tz);
49extern int cap_ptrace(struct task_struct *parent, struct task_struct *child); 49extern int cap_ptrace(struct task_struct *parent, struct task_struct *child,
50 unsigned int mode);
50extern int cap_capget(struct task_struct *target, kernel_cap_t *effective, kernel_cap_t *inheritable, kernel_cap_t *permitted); 51extern int cap_capget(struct task_struct *target, kernel_cap_t *effective, kernel_cap_t *inheritable, kernel_cap_t *permitted);
51extern int cap_capset_check(struct task_struct *target, kernel_cap_t *effective, kernel_cap_t *inheritable, kernel_cap_t *permitted); 52extern int cap_capset_check(struct task_struct *target, kernel_cap_t *effective, kernel_cap_t *inheritable, kernel_cap_t *permitted);
52extern void cap_capset_set(struct task_struct *target, kernel_cap_t *effective, kernel_cap_t *inheritable, kernel_cap_t *permitted); 53extern void cap_capset_set(struct task_struct *target, kernel_cap_t *effective, kernel_cap_t *inheritable, kernel_cap_t *permitted);
@@ -79,6 +80,7 @@ struct xfrm_selector;
79struct xfrm_policy; 80struct xfrm_policy;
80struct xfrm_state; 81struct xfrm_state;
81struct xfrm_user_sec_ctx; 82struct xfrm_user_sec_ctx;
83struct seq_file;
82 84
83extern int cap_netlink_send(struct sock *sk, struct sk_buff *skb); 85extern int cap_netlink_send(struct sock *sk, struct sk_buff *skb);
84extern int cap_netlink_recv(struct sk_buff *skb, int cap); 86extern int cap_netlink_recv(struct sk_buff *skb, int cap);
@@ -289,10 +291,6 @@ static inline void security_free_mnt_opts(struct security_mnt_opts *opts)
289 * Update module state after a successful pivot. 291 * Update module state after a successful pivot.
290 * @old_path contains the path for the old root. 292 * @old_path contains the path for the old root.
291 * @new_path contains the path for the new root. 293 * @new_path contains the path for the new root.
292 * @sb_get_mnt_opts:
293 * Get the security relevant mount options used for a superblock
294 * @sb the superblock to get security mount options from
295 * @opts binary data structure containing all lsm mount data
296 * @sb_set_mnt_opts: 294 * @sb_set_mnt_opts:
297 * Set the security relevant mount options used for a superblock 295 * Set the security relevant mount options used for a superblock
298 * @sb the superblock to set security mount options for 296 * @sb the superblock to set security mount options for
@@ -1170,6 +1168,7 @@ static inline void security_free_mnt_opts(struct security_mnt_opts *opts)
1170 * attributes would be changed by the execve. 1168 * attributes would be changed by the execve.
1171 * @parent contains the task_struct structure for parent process. 1169 * @parent contains the task_struct structure for parent process.
1172 * @child contains the task_struct structure for child process. 1170 * @child contains the task_struct structure for child process.
1171 * @mode contains the PTRACE_MODE flags indicating the form of access.
1173 * Return 0 if permission is granted. 1172 * Return 0 if permission is granted.
1174 * @capget: 1173 * @capget:
1175 * Get the @effective, @inheritable, and @permitted capability sets for 1174 * Get the @effective, @inheritable, and @permitted capability sets for
@@ -1240,11 +1239,6 @@ static inline void security_free_mnt_opts(struct security_mnt_opts *opts)
1240 * @pages contains the number of pages. 1239 * @pages contains the number of pages.
1241 * Return 0 if permission is granted. 1240 * Return 0 if permission is granted.
1242 * 1241 *
1243 * @register_security:
1244 * allow module stacking.
1245 * @name contains the name of the security module being stacked.
1246 * @ops contains a pointer to the struct security_operations of the module to stack.
1247 *
1248 * @secid_to_secctx: 1242 * @secid_to_secctx:
1249 * Convert secid to security context. 1243 * Convert secid to security context.
1250 * @secid contains the security ID. 1244 * @secid contains the security ID.
@@ -1295,7 +1289,8 @@ static inline void security_free_mnt_opts(struct security_mnt_opts *opts)
1295struct security_operations { 1289struct security_operations {
1296 char name[SECURITY_NAME_MAX + 1]; 1290 char name[SECURITY_NAME_MAX + 1];
1297 1291
1298 int (*ptrace) (struct task_struct *parent, struct task_struct *child); 1292 int (*ptrace) (struct task_struct *parent, struct task_struct *child,
1293 unsigned int mode);
1299 int (*capget) (struct task_struct *target, 1294 int (*capget) (struct task_struct *target,
1300 kernel_cap_t *effective, 1295 kernel_cap_t *effective,
1301 kernel_cap_t *inheritable, kernel_cap_t *permitted); 1296 kernel_cap_t *inheritable, kernel_cap_t *permitted);
@@ -1328,6 +1323,7 @@ struct security_operations {
1328 void (*sb_free_security) (struct super_block *sb); 1323 void (*sb_free_security) (struct super_block *sb);
1329 int (*sb_copy_data) (char *orig, char *copy); 1324 int (*sb_copy_data) (char *orig, char *copy);
1330 int (*sb_kern_mount) (struct super_block *sb, void *data); 1325 int (*sb_kern_mount) (struct super_block *sb, void *data);
1326 int (*sb_show_options) (struct seq_file *m, struct super_block *sb);
1331 int (*sb_statfs) (struct dentry *dentry); 1327 int (*sb_statfs) (struct dentry *dentry);
1332 int (*sb_mount) (char *dev_name, struct path *path, 1328 int (*sb_mount) (char *dev_name, struct path *path,
1333 char *type, unsigned long flags, void *data); 1329 char *type, unsigned long flags, void *data);
@@ -1343,8 +1339,6 @@ struct security_operations {
1343 struct path *new_path); 1339 struct path *new_path);
1344 void (*sb_post_pivotroot) (struct path *old_path, 1340 void (*sb_post_pivotroot) (struct path *old_path,
1345 struct path *new_path); 1341 struct path *new_path);
1346 int (*sb_get_mnt_opts) (const struct super_block *sb,
1347 struct security_mnt_opts *opts);
1348 int (*sb_set_mnt_opts) (struct super_block *sb, 1342 int (*sb_set_mnt_opts) (struct super_block *sb,
1349 struct security_mnt_opts *opts); 1343 struct security_mnt_opts *opts);
1350 void (*sb_clone_mnt_opts) (const struct super_block *oldsb, 1344 void (*sb_clone_mnt_opts) (const struct super_block *oldsb,
@@ -1472,10 +1466,6 @@ struct security_operations {
1472 int (*netlink_send) (struct sock *sk, struct sk_buff *skb); 1466 int (*netlink_send) (struct sock *sk, struct sk_buff *skb);
1473 int (*netlink_recv) (struct sk_buff *skb, int cap); 1467 int (*netlink_recv) (struct sk_buff *skb, int cap);
1474 1468
1475 /* allow module stacking */
1476 int (*register_security) (const char *name,
1477 struct security_operations *ops);
1478
1479 void (*d_instantiate) (struct dentry *dentry, struct inode *inode); 1469 void (*d_instantiate) (struct dentry *dentry, struct inode *inode);
1480 1470
1481 int (*getprocattr) (struct task_struct *p, char *name, char **value); 1471 int (*getprocattr) (struct task_struct *p, char *name, char **value);
@@ -1565,7 +1555,6 @@ struct security_operations {
1565extern int security_init(void); 1555extern int security_init(void);
1566extern int security_module_enable(struct security_operations *ops); 1556extern int security_module_enable(struct security_operations *ops);
1567extern int register_security(struct security_operations *ops); 1557extern int register_security(struct security_operations *ops);
1568extern int mod_reg_security(const char *name, struct security_operations *ops);
1569extern struct dentry *securityfs_create_file(const char *name, mode_t mode, 1558extern struct dentry *securityfs_create_file(const char *name, mode_t mode,
1570 struct dentry *parent, void *data, 1559 struct dentry *parent, void *data,
1571 const struct file_operations *fops); 1560 const struct file_operations *fops);
@@ -1573,7 +1562,8 @@ extern struct dentry *securityfs_create_dir(const char *name, struct dentry *par
1573extern void securityfs_remove(struct dentry *dentry); 1562extern void securityfs_remove(struct dentry *dentry);
1574 1563
1575/* Security operations */ 1564/* Security operations */
1576int security_ptrace(struct task_struct *parent, struct task_struct *child); 1565int security_ptrace(struct task_struct *parent, struct task_struct *child,
1566 unsigned int mode);
1577int security_capget(struct task_struct *target, 1567int security_capget(struct task_struct *target,
1578 kernel_cap_t *effective, 1568 kernel_cap_t *effective,
1579 kernel_cap_t *inheritable, 1569 kernel_cap_t *inheritable,
@@ -1606,6 +1596,7 @@ int security_sb_alloc(struct super_block *sb);
1606void security_sb_free(struct super_block *sb); 1596void security_sb_free(struct super_block *sb);
1607int security_sb_copy_data(char *orig, char *copy); 1597int security_sb_copy_data(char *orig, char *copy);
1608int security_sb_kern_mount(struct super_block *sb, void *data); 1598int security_sb_kern_mount(struct super_block *sb, void *data);
1599int security_sb_show_options(struct seq_file *m, struct super_block *sb);
1609int security_sb_statfs(struct dentry *dentry); 1600int security_sb_statfs(struct dentry *dentry);
1610int security_sb_mount(char *dev_name, struct path *path, 1601int security_sb_mount(char *dev_name, struct path *path,
1611 char *type, unsigned long flags, void *data); 1602 char *type, unsigned long flags, void *data);
@@ -1617,8 +1608,6 @@ void security_sb_post_remount(struct vfsmount *mnt, unsigned long flags, void *d
1617void security_sb_post_addmount(struct vfsmount *mnt, struct path *mountpoint); 1608void security_sb_post_addmount(struct vfsmount *mnt, struct path *mountpoint);
1618int security_sb_pivotroot(struct path *old_path, struct path *new_path); 1609int security_sb_pivotroot(struct path *old_path, struct path *new_path);
1619void security_sb_post_pivotroot(struct path *old_path, struct path *new_path); 1610void security_sb_post_pivotroot(struct path *old_path, struct path *new_path);
1620int security_sb_get_mnt_opts(const struct super_block *sb,
1621 struct security_mnt_opts *opts);
1622int security_sb_set_mnt_opts(struct super_block *sb, struct security_mnt_opts *opts); 1611int security_sb_set_mnt_opts(struct super_block *sb, struct security_mnt_opts *opts);
1623void security_sb_clone_mnt_opts(const struct super_block *oldsb, 1612void security_sb_clone_mnt_opts(const struct super_block *oldsb,
1624 struct super_block *newsb); 1613 struct super_block *newsb);
@@ -1755,9 +1744,11 @@ static inline int security_init(void)
1755 return 0; 1744 return 0;
1756} 1745}
1757 1746
1758static inline int security_ptrace(struct task_struct *parent, struct task_struct *child) 1747static inline int security_ptrace(struct task_struct *parent,
1748 struct task_struct *child,
1749 unsigned int mode)
1759{ 1750{
1760 return cap_ptrace(parent, child); 1751 return cap_ptrace(parent, child, mode);
1761} 1752}
1762 1753
1763static inline int security_capget(struct task_struct *target, 1754static inline int security_capget(struct task_struct *target,
@@ -1881,6 +1872,12 @@ static inline int security_sb_kern_mount(struct super_block *sb, void *data)
1881 return 0; 1872 return 0;
1882} 1873}
1883 1874
1875static inline int security_sb_show_options(struct seq_file *m,
1876 struct super_block *sb)
1877{
1878 return 0;
1879}
1880
1884static inline int security_sb_statfs(struct dentry *dentry) 1881static inline int security_sb_statfs(struct dentry *dentry)
1885{ 1882{
1886 return 0; 1883 return 0;
@@ -1927,12 +1924,6 @@ static inline int security_sb_pivotroot(struct path *old_path,
1927static inline void security_sb_post_pivotroot(struct path *old_path, 1924static inline void security_sb_post_pivotroot(struct path *old_path,
1928 struct path *new_path) 1925 struct path *new_path)
1929{ } 1926{ }
1930static inline int security_sb_get_mnt_opts(const struct super_block *sb,
1931 struct security_mnt_opts *opts)
1932{
1933 security_init_mnt_opts(opts);
1934 return 0;
1935}
1936 1927
1937static inline int security_sb_set_mnt_opts(struct super_block *sb, 1928static inline int security_sb_set_mnt_opts(struct super_block *sb,
1938 struct security_mnt_opts *opts) 1929 struct security_mnt_opts *opts)
diff --git a/kernel/ptrace.c b/kernel/ptrace.c
index 6c19e94fd0a5..e337390fce01 100644
--- a/kernel/ptrace.c
+++ b/kernel/ptrace.c
@@ -121,7 +121,7 @@ int ptrace_check_attach(struct task_struct *child, int kill)
121 return ret; 121 return ret;
122} 122}
123 123
124int __ptrace_may_attach(struct task_struct *task) 124int __ptrace_may_access(struct task_struct *task, unsigned int mode)
125{ 125{
126 /* May we inspect the given task? 126 /* May we inspect the given task?
127 * This check is used both for attaching with ptrace 127 * This check is used both for attaching with ptrace
@@ -148,16 +148,16 @@ int __ptrace_may_attach(struct task_struct *task)
148 if (!dumpable && !capable(CAP_SYS_PTRACE)) 148 if (!dumpable && !capable(CAP_SYS_PTRACE))
149 return -EPERM; 149 return -EPERM;
150 150
151 return security_ptrace(current, task); 151 return security_ptrace(current, task, mode);
152} 152}
153 153
154int ptrace_may_attach(struct task_struct *task) 154bool ptrace_may_access(struct task_struct *task, unsigned int mode)
155{ 155{
156 int err; 156 int err;
157 task_lock(task); 157 task_lock(task);
158 err = __ptrace_may_attach(task); 158 err = __ptrace_may_access(task, mode);
159 task_unlock(task); 159 task_unlock(task);
160 return !err; 160 return (!err ? true : false);
161} 161}
162 162
163int ptrace_attach(struct task_struct *task) 163int ptrace_attach(struct task_struct *task)
@@ -195,7 +195,7 @@ repeat:
195 /* the same process cannot be attached many times */ 195 /* the same process cannot be attached many times */
196 if (task->ptrace & PT_PTRACED) 196 if (task->ptrace & PT_PTRACED)
197 goto bad; 197 goto bad;
198 retval = __ptrace_may_attach(task); 198 retval = __ptrace_may_access(task, PTRACE_MODE_ATTACH);
199 if (retval) 199 if (retval)
200 goto bad; 200 goto bad;
201 201
@@ -494,7 +494,8 @@ int ptrace_traceme(void)
494 */ 494 */
495 task_lock(current); 495 task_lock(current);
496 if (!(current->ptrace & PT_PTRACED)) { 496 if (!(current->ptrace & PT_PTRACED)) {
497 ret = security_ptrace(current->parent, current); 497 ret = security_ptrace(current->parent, current,
498 PTRACE_MODE_ATTACH);
498 /* 499 /*
499 * Set the ptrace bit in the process ptrace flags. 500 * Set the ptrace bit in the process ptrace flags.
500 */ 501 */
diff --git a/security/Kconfig b/security/Kconfig
index 49b51f964897..62ed4717d334 100644
--- a/security/Kconfig
+++ b/security/Kconfig
@@ -73,17 +73,9 @@ config SECURITY_NETWORK_XFRM
73 IPSec. 73 IPSec.
74 If you are unsure how to answer this question, answer N. 74 If you are unsure how to answer this question, answer N.
75 75
76config SECURITY_CAPABILITIES
77 bool "Default Linux Capabilities"
78 depends on SECURITY
79 default y
80 help
81 This enables the "default" Linux capabilities functionality.
82 If you are unsure how to answer this question, answer Y.
83
84config SECURITY_FILE_CAPABILITIES 76config SECURITY_FILE_CAPABILITIES
85 bool "File POSIX Capabilities (EXPERIMENTAL)" 77 bool "File POSIX Capabilities (EXPERIMENTAL)"
86 depends on (SECURITY=n || SECURITY_CAPABILITIES!=n) && EXPERIMENTAL 78 depends on EXPERIMENTAL
87 default n 79 default n
88 help 80 help
89 This enables filesystem capabilities, allowing you to give 81 This enables filesystem capabilities, allowing you to give
diff --git a/security/Makefile b/security/Makefile
index 7ef1107a7287..f65426099aa6 100644
--- a/security/Makefile
+++ b/security/Makefile
@@ -6,16 +6,13 @@ obj-$(CONFIG_KEYS) += keys/
6subdir-$(CONFIG_SECURITY_SELINUX) += selinux 6subdir-$(CONFIG_SECURITY_SELINUX) += selinux
7subdir-$(CONFIG_SECURITY_SMACK) += smack 7subdir-$(CONFIG_SECURITY_SMACK) += smack
8 8
9# if we don't select a security model, use the default capabilities 9# always enable default capabilities
10ifneq ($(CONFIG_SECURITY),y)
11obj-y += commoncap.o 10obj-y += commoncap.o
12endif
13 11
14# Object file lists 12# Object file lists
15obj-$(CONFIG_SECURITY) += security.o dummy.o inode.o 13obj-$(CONFIG_SECURITY) += security.o capability.o inode.o
16# Must precede capability.o in order to stack properly. 14# Must precede capability.o in order to stack properly.
17obj-$(CONFIG_SECURITY_SELINUX) += selinux/built-in.o 15obj-$(CONFIG_SECURITY_SELINUX) += selinux/built-in.o
18obj-$(CONFIG_SECURITY_SMACK) += commoncap.o smack/built-in.o 16obj-$(CONFIG_SECURITY_SMACK) += smack/built-in.o
19obj-$(CONFIG_SECURITY_CAPABILITIES) += commoncap.o capability.o 17obj-$(CONFIG_SECURITY_ROOTPLUG) += root_plug.o
20obj-$(CONFIG_SECURITY_ROOTPLUG) += commoncap.o root_plug.o
21obj-$(CONFIG_CGROUP_DEVICE) += device_cgroup.o 18obj-$(CONFIG_CGROUP_DEVICE) += device_cgroup.o
diff --git a/security/capability.c b/security/capability.c
index 38ac54e3aed1..5b01c0b02422 100644
--- a/security/capability.c
+++ b/security/capability.c
@@ -1,6 +1,8 @@
1/* 1/*
2 * Capabilities Linux Security Module 2 * Capabilities Linux Security Module
3 * 3 *
4 * This is the default security module in case no other module is loaded.
5 *
4 * This program is free software; you can redistribute it and/or modify 6 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by 7 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or 8 * the Free Software Foundation; either version 2 of the License, or
@@ -8,75 +10,988 @@
8 * 10 *
9 */ 11 */
10 12
11#include <linux/init.h>
12#include <linux/kernel.h>
13#include <linux/security.h> 13#include <linux/security.h>
14#include <linux/file.h>
15#include <linux/mm.h>
16#include <linux/mman.h>
17#include <linux/pagemap.h>
18#include <linux/swap.h>
19#include <linux/skbuff.h>
20#include <linux/netlink.h>
21#include <linux/ptrace.h>
22#include <linux/moduleparam.h>
23
24static struct security_operations capability_ops = {
25 .ptrace = cap_ptrace,
26 .capget = cap_capget,
27 .capset_check = cap_capset_check,
28 .capset_set = cap_capset_set,
29 .capable = cap_capable,
30 .settime = cap_settime,
31 .netlink_send = cap_netlink_send,
32 .netlink_recv = cap_netlink_recv,
33
34 .bprm_apply_creds = cap_bprm_apply_creds,
35 .bprm_set_security = cap_bprm_set_security,
36 .bprm_secureexec = cap_bprm_secureexec,
37
38 .inode_setxattr = cap_inode_setxattr,
39 .inode_removexattr = cap_inode_removexattr,
40 .inode_need_killpriv = cap_inode_need_killpriv,
41 .inode_killpriv = cap_inode_killpriv,
42
43 .task_setscheduler = cap_task_setscheduler,
44 .task_setioprio = cap_task_setioprio,
45 .task_setnice = cap_task_setnice,
46 .task_post_setuid = cap_task_post_setuid,
47 .task_prctl = cap_task_prctl,
48 .task_reparent_to_init = cap_task_reparent_to_init,
49
50 .syslog = cap_syslog,
51
52 .vm_enough_memory = cap_vm_enough_memory,
53};
54 14
55/* flag to keep track of how we were registered */ 15static int cap_acct(struct file *file)
56static int secondary; 16{
17 return 0;
18}
19
20static int cap_sysctl(ctl_table *table, int op)
21{
22 return 0;
23}
24
25static int cap_quotactl(int cmds, int type, int id, struct super_block *sb)
26{
27 return 0;
28}
29
30static int cap_quota_on(struct dentry *dentry)
31{
32 return 0;
33}
34
35static int cap_bprm_alloc_security(struct linux_binprm *bprm)
36{
37 return 0;
38}
39
40static void cap_bprm_free_security(struct linux_binprm *bprm)
41{
42}
43
44static void cap_bprm_post_apply_creds(struct linux_binprm *bprm)
45{
46}
47
48static int cap_bprm_check_security(struct linux_binprm *bprm)
49{
50 return 0;
51}
52
53static int cap_sb_alloc_security(struct super_block *sb)
54{
55 return 0;
56}
57
58static void cap_sb_free_security(struct super_block *sb)
59{
60}
61
62static int cap_sb_copy_data(char *orig, char *copy)
63{
64 return 0;
65}
66
67static int cap_sb_kern_mount(struct super_block *sb, void *data)
68{
69 return 0;
70}
71
72static int cap_sb_show_options(struct seq_file *m, struct super_block *sb)
73{
74 return 0;
75}
76
77static int cap_sb_statfs(struct dentry *dentry)
78{
79 return 0;
80}
81
82static int cap_sb_mount(char *dev_name, struct path *path, char *type,
83 unsigned long flags, void *data)
84{
85 return 0;
86}
87
88static int cap_sb_check_sb(struct vfsmount *mnt, struct path *path)
89{
90 return 0;
91}
92
93static int cap_sb_umount(struct vfsmount *mnt, int flags)
94{
95 return 0;
96}
97
98static void cap_sb_umount_close(struct vfsmount *mnt)
99{
100}
101
102static void cap_sb_umount_busy(struct vfsmount *mnt)
103{
104}
105
106static void cap_sb_post_remount(struct vfsmount *mnt, unsigned long flags,
107 void *data)
108{
109}
110
111static void cap_sb_post_addmount(struct vfsmount *mnt, struct path *path)
112{
113}
114
115static int cap_sb_pivotroot(struct path *old_path, struct path *new_path)
116{
117 return 0;
118}
119
120static void cap_sb_post_pivotroot(struct path *old_path, struct path *new_path)
121{
122}
123
124static int cap_sb_set_mnt_opts(struct super_block *sb,
125 struct security_mnt_opts *opts)
126{
127 if (unlikely(opts->num_mnt_opts))
128 return -EOPNOTSUPP;
129 return 0;
130}
131
132static void cap_sb_clone_mnt_opts(const struct super_block *oldsb,
133 struct super_block *newsb)
134{
135}
136
137static int cap_sb_parse_opts_str(char *options, struct security_mnt_opts *opts)
138{
139 return 0;
140}
141
142static int cap_inode_alloc_security(struct inode *inode)
143{
144 return 0;
145}
146
147static void cap_inode_free_security(struct inode *inode)
148{
149}
150
151static int cap_inode_init_security(struct inode *inode, struct inode *dir,
152 char **name, void **value, size_t *len)
153{
154 return -EOPNOTSUPP;
155}
156
157static int cap_inode_create(struct inode *inode, struct dentry *dentry,
158 int mask)
159{
160 return 0;
161}
162
163static int cap_inode_link(struct dentry *old_dentry, struct inode *inode,
164 struct dentry *new_dentry)
165{
166 return 0;
167}
168
169static int cap_inode_unlink(struct inode *inode, struct dentry *dentry)
170{
171 return 0;
172}
173
174static int cap_inode_symlink(struct inode *inode, struct dentry *dentry,
175 const char *name)
176{
177 return 0;
178}
179
180static int cap_inode_mkdir(struct inode *inode, struct dentry *dentry,
181 int mask)
182{
183 return 0;
184}
185
186static int cap_inode_rmdir(struct inode *inode, struct dentry *dentry)
187{
188 return 0;
189}
190
191static int cap_inode_mknod(struct inode *inode, struct dentry *dentry,
192 int mode, dev_t dev)
193{
194 return 0;
195}
196
197static int cap_inode_rename(struct inode *old_inode, struct dentry *old_dentry,
198 struct inode *new_inode, struct dentry *new_dentry)
199{
200 return 0;
201}
202
203static int cap_inode_readlink(struct dentry *dentry)
204{
205 return 0;
206}
207
208static int cap_inode_follow_link(struct dentry *dentry,
209 struct nameidata *nameidata)
210{
211 return 0;
212}
213
214static int cap_inode_permission(struct inode *inode, int mask,
215 struct nameidata *nd)
216{
217 return 0;
218}
219
220static int cap_inode_setattr(struct dentry *dentry, struct iattr *iattr)
221{
222 return 0;
223}
224
225static int cap_inode_getattr(struct vfsmount *mnt, struct dentry *dentry)
226{
227 return 0;
228}
229
230static void cap_inode_delete(struct inode *ino)
231{
232}
233
234static void cap_inode_post_setxattr(struct dentry *dentry, const char *name,
235 const void *value, size_t size, int flags)
236{
237}
238
239static int cap_inode_getxattr(struct dentry *dentry, const char *name)
240{
241 return 0;
242}
243
244static int cap_inode_listxattr(struct dentry *dentry)
245{
246 return 0;
247}
248
249static int cap_inode_getsecurity(const struct inode *inode, const char *name,
250 void **buffer, bool alloc)
251{
252 return -EOPNOTSUPP;
253}
254
255static int cap_inode_setsecurity(struct inode *inode, const char *name,
256 const void *value, size_t size, int flags)
257{
258 return -EOPNOTSUPP;
259}
260
261static int cap_inode_listsecurity(struct inode *inode, char *buffer,
262 size_t buffer_size)
263{
264 return 0;
265}
266
267static void cap_inode_getsecid(const struct inode *inode, u32 *secid)
268{
269 *secid = 0;
270}
271
272static int cap_file_permission(struct file *file, int mask)
273{
274 return 0;
275}
276
277static int cap_file_alloc_security(struct file *file)
278{
279 return 0;
280}
281
282static void cap_file_free_security(struct file *file)
283{
284}
285
286static int cap_file_ioctl(struct file *file, unsigned int command,
287 unsigned long arg)
288{
289 return 0;
290}
291
292static int cap_file_mmap(struct file *file, unsigned long reqprot,
293 unsigned long prot, unsigned long flags,
294 unsigned long addr, unsigned long addr_only)
295{
296 if ((addr < mmap_min_addr) && !capable(CAP_SYS_RAWIO))
297 return -EACCES;
298 return 0;
299}
300
301static int cap_file_mprotect(struct vm_area_struct *vma, unsigned long reqprot,
302 unsigned long prot)
303{
304 return 0;
305}
306
307static int cap_file_lock(struct file *file, unsigned int cmd)
308{
309 return 0;
310}
311
312static int cap_file_fcntl(struct file *file, unsigned int cmd,
313 unsigned long arg)
314{
315 return 0;
316}
317
318static int cap_file_set_fowner(struct file *file)
319{
320 return 0;
321}
322
323static int cap_file_send_sigiotask(struct task_struct *tsk,
324 struct fown_struct *fown, int sig)
325{
326 return 0;
327}
328
329static int cap_file_receive(struct file *file)
330{
331 return 0;
332}
333
334static int cap_dentry_open(struct file *file)
335{
336 return 0;
337}
338
339static int cap_task_create(unsigned long clone_flags)
340{
341 return 0;
342}
343
344static int cap_task_alloc_security(struct task_struct *p)
345{
346 return 0;
347}
348
349static void cap_task_free_security(struct task_struct *p)
350{
351}
352
353static int cap_task_setuid(uid_t id0, uid_t id1, uid_t id2, int flags)
354{
355 return 0;
356}
357
358static int cap_task_setgid(gid_t id0, gid_t id1, gid_t id2, int flags)
359{
360 return 0;
361}
362
363static int cap_task_setpgid(struct task_struct *p, pid_t pgid)
364{
365 return 0;
366}
367
368static int cap_task_getpgid(struct task_struct *p)
369{
370 return 0;
371}
372
373static int cap_task_getsid(struct task_struct *p)
374{
375 return 0;
376}
377
378static void cap_task_getsecid(struct task_struct *p, u32 *secid)
379{
380 *secid = 0;
381}
382
383static int cap_task_setgroups(struct group_info *group_info)
384{
385 return 0;
386}
387
388static int cap_task_getioprio(struct task_struct *p)
389{
390 return 0;
391}
392
393static int cap_task_setrlimit(unsigned int resource, struct rlimit *new_rlim)
394{
395 return 0;
396}
397
398static int cap_task_getscheduler(struct task_struct *p)
399{
400 return 0;
401}
402
403static int cap_task_movememory(struct task_struct *p)
404{
405 return 0;
406}
407
408static int cap_task_wait(struct task_struct *p)
409{
410 return 0;
411}
412
413static int cap_task_kill(struct task_struct *p, struct siginfo *info,
414 int sig, u32 secid)
415{
416 return 0;
417}
418
419static void cap_task_to_inode(struct task_struct *p, struct inode *inode)
420{
421}
422
423static int cap_ipc_permission(struct kern_ipc_perm *ipcp, short flag)
424{
425 return 0;
426}
427
428static void cap_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid)
429{
430 *secid = 0;
431}
432
433static int cap_msg_msg_alloc_security(struct msg_msg *msg)
434{
435 return 0;
436}
437
438static void cap_msg_msg_free_security(struct msg_msg *msg)
439{
440}
441
442static int cap_msg_queue_alloc_security(struct msg_queue *msq)
443{
444 return 0;
445}
446
447static void cap_msg_queue_free_security(struct msg_queue *msq)
448{
449}
450
451static int cap_msg_queue_associate(struct msg_queue *msq, int msqflg)
452{
453 return 0;
454}
455
456static int cap_msg_queue_msgctl(struct msg_queue *msq, int cmd)
457{
458 return 0;
459}
460
461static int cap_msg_queue_msgsnd(struct msg_queue *msq, struct msg_msg *msg,
462 int msgflg)
463{
464 return 0;
465}
466
467static int cap_msg_queue_msgrcv(struct msg_queue *msq, struct msg_msg *msg,
468 struct task_struct *target, long type, int mode)
469{
470 return 0;
471}
472
473static int cap_shm_alloc_security(struct shmid_kernel *shp)
474{
475 return 0;
476}
477
478static void cap_shm_free_security(struct shmid_kernel *shp)
479{
480}
481
482static int cap_shm_associate(struct shmid_kernel *shp, int shmflg)
483{
484 return 0;
485}
486
487static int cap_shm_shmctl(struct shmid_kernel *shp, int cmd)
488{
489 return 0;
490}
491
492static int cap_shm_shmat(struct shmid_kernel *shp, char __user *shmaddr,
493 int shmflg)
494{
495 return 0;
496}
497
498static int cap_sem_alloc_security(struct sem_array *sma)
499{
500 return 0;
501}
502
503static void cap_sem_free_security(struct sem_array *sma)
504{
505}
506
507static int cap_sem_associate(struct sem_array *sma, int semflg)
508{
509 return 0;
510}
511
512static int cap_sem_semctl(struct sem_array *sma, int cmd)
513{
514 return 0;
515}
516
517static int cap_sem_semop(struct sem_array *sma, struct sembuf *sops,
518 unsigned nsops, int alter)
519{
520 return 0;
521}
522
523#ifdef CONFIG_SECURITY_NETWORK
524static int cap_unix_stream_connect(struct socket *sock, struct socket *other,
525 struct sock *newsk)
526{
527 return 0;
528}
529
530static int cap_unix_may_send(struct socket *sock, struct socket *other)
531{
532 return 0;
533}
534
535static int cap_socket_create(int family, int type, int protocol, int kern)
536{
537 return 0;
538}
539
540static int cap_socket_post_create(struct socket *sock, int family, int type,
541 int protocol, int kern)
542{
543 return 0;
544}
545
546static int cap_socket_bind(struct socket *sock, struct sockaddr *address,
547 int addrlen)
548{
549 return 0;
550}
551
552static int cap_socket_connect(struct socket *sock, struct sockaddr *address,
553 int addrlen)
554{
555 return 0;
556}
557
558static int cap_socket_listen(struct socket *sock, int backlog)
559{
560 return 0;
561}
562
563static int cap_socket_accept(struct socket *sock, struct socket *newsock)
564{
565 return 0;
566}
567
568static void cap_socket_post_accept(struct socket *sock, struct socket *newsock)
569{
570}
571
572static int cap_socket_sendmsg(struct socket *sock, struct msghdr *msg, int size)
573{
574 return 0;
575}
576
577static int cap_socket_recvmsg(struct socket *sock, struct msghdr *msg,
578 int size, int flags)
579{
580 return 0;
581}
582
583static int cap_socket_getsockname(struct socket *sock)
584{
585 return 0;
586}
587
588static int cap_socket_getpeername(struct socket *sock)
589{
590 return 0;
591}
592
593static int cap_socket_setsockopt(struct socket *sock, int level, int optname)
594{
595 return 0;
596}
597
598static int cap_socket_getsockopt(struct socket *sock, int level, int optname)
599{
600 return 0;
601}
602
603static int cap_socket_shutdown(struct socket *sock, int how)
604{
605 return 0;
606}
607
608static int cap_socket_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
609{
610 return 0;
611}
612
613static int cap_socket_getpeersec_stream(struct socket *sock,
614 char __user *optval,
615 int __user *optlen, unsigned len)
616{
617 return -ENOPROTOOPT;
618}
619
620static int cap_socket_getpeersec_dgram(struct socket *sock,
621 struct sk_buff *skb, u32 *secid)
622{
623 return -ENOPROTOOPT;
624}
625
626static int cap_sk_alloc_security(struct sock *sk, int family, gfp_t priority)
627{
628 return 0;
629}
630
631static void cap_sk_free_security(struct sock *sk)
632{
633}
634
635static void cap_sk_clone_security(const struct sock *sk, struct sock *newsk)
636{
637}
638
639static void cap_sk_getsecid(struct sock *sk, u32 *secid)
640{
641}
642
643static void cap_sock_graft(struct sock *sk, struct socket *parent)
644{
645}
646
647static int cap_inet_conn_request(struct sock *sk, struct sk_buff *skb,
648 struct request_sock *req)
649{
650 return 0;
651}
652
653static void cap_inet_csk_clone(struct sock *newsk,
654 const struct request_sock *req)
655{
656}
657
658static void cap_inet_conn_established(struct sock *sk, struct sk_buff *skb)
659{
660}
661
662static void cap_req_classify_flow(const struct request_sock *req,
663 struct flowi *fl)
664{
665}
666#endif /* CONFIG_SECURITY_NETWORK */
667
668#ifdef CONFIG_SECURITY_NETWORK_XFRM
669static int cap_xfrm_policy_alloc_security(struct xfrm_sec_ctx **ctxp,
670 struct xfrm_user_sec_ctx *sec_ctx)
671{
672 return 0;
673}
674
675static int cap_xfrm_policy_clone_security(struct xfrm_sec_ctx *old_ctx,
676 struct xfrm_sec_ctx **new_ctxp)
677{
678 return 0;
679}
680
681static void cap_xfrm_policy_free_security(struct xfrm_sec_ctx *ctx)
682{
683}
684
685static int cap_xfrm_policy_delete_security(struct xfrm_sec_ctx *ctx)
686{
687 return 0;
688}
689
690static int cap_xfrm_state_alloc_security(struct xfrm_state *x,
691 struct xfrm_user_sec_ctx *sec_ctx,
692 u32 secid)
693{
694 return 0;
695}
696
697static void cap_xfrm_state_free_security(struct xfrm_state *x)
698{
699}
700
701static int cap_xfrm_state_delete_security(struct xfrm_state *x)
702{
703 return 0;
704}
705
706static int cap_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 sk_sid, u8 dir)
707{
708 return 0;
709}
710
711static int cap_xfrm_state_pol_flow_match(struct xfrm_state *x,
712 struct xfrm_policy *xp,
713 struct flowi *fl)
714{
715 return 1;
716}
717
718static int cap_xfrm_decode_session(struct sk_buff *skb, u32 *fl, int ckall)
719{
720 return 0;
721}
722
723#endif /* CONFIG_SECURITY_NETWORK_XFRM */
724static void cap_d_instantiate(struct dentry *dentry, struct inode *inode)
725{
726}
727
728static int cap_getprocattr(struct task_struct *p, char *name, char **value)
729{
730 return -EINVAL;
731}
732
733static int cap_setprocattr(struct task_struct *p, char *name, void *value,
734 size_t size)
735{
736 return -EINVAL;
737}
738
739static int cap_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
740{
741 return -EOPNOTSUPP;
742}
743
744static int cap_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid)
745{
746 return -EOPNOTSUPP;
747}
748
749static void cap_release_secctx(char *secdata, u32 seclen)
750{
751}
752
753#ifdef CONFIG_KEYS
754static int cap_key_alloc(struct key *key, struct task_struct *ctx,
755 unsigned long flags)
756{
757 return 0;
758}
759
760static void cap_key_free(struct key *key)
761{
762}
57 763
58static int capability_disable; 764static int cap_key_permission(key_ref_t key_ref, struct task_struct *context,
59module_param_named(disable, capability_disable, int, 0); 765 key_perm_t perm)
766{
767 return 0;
768}
60 769
61static int __init capability_init (void) 770static int cap_key_getsecurity(struct key *key, char **_buffer)
62{ 771{
63 if (capability_disable) { 772 *_buffer = NULL;
64 printk(KERN_INFO "Capabilities disabled at initialization\n");
65 return 0;
66 }
67 /* register ourselves with the security framework */
68 if (register_security (&capability_ops)) {
69 /* try registering with primary module */
70 if (mod_reg_security (KBUILD_MODNAME, &capability_ops)) {
71 printk (KERN_INFO "Failure registering capabilities "
72 "with primary security module.\n");
73 return -EINVAL;
74 }
75 secondary = 1;
76 }
77 printk (KERN_INFO "Capability LSM initialized%s\n",
78 secondary ? " as secondary" : "");
79 return 0; 773 return 0;
80} 774}
81 775
82security_initcall (capability_init); 776#endif /* CONFIG_KEYS */
777
778#ifdef CONFIG_AUDIT
779static int cap_audit_rule_init(u32 field, u32 op, char *rulestr, void **lsmrule)
780{
781 return 0;
782}
783
784static int cap_audit_rule_known(struct audit_krule *krule)
785{
786 return 0;
787}
788
789static int cap_audit_rule_match(u32 secid, u32 field, u32 op, void *lsmrule,
790 struct audit_context *actx)
791{
792 return 0;
793}
794
795static void cap_audit_rule_free(void *lsmrule)
796{
797}
798#endif /* CONFIG_AUDIT */
799
800struct security_operations default_security_ops = {
801 .name = "default",
802};
803
804#define set_to_cap_if_null(ops, function) \
805 do { \
806 if (!ops->function) { \
807 ops->function = cap_##function; \
808 pr_debug("Had to override the " #function \
809 " security operation with the default.\n");\
810 } \
811 } while (0)
812
813void security_fixup_ops(struct security_operations *ops)
814{
815 set_to_cap_if_null(ops, ptrace);
816 set_to_cap_if_null(ops, capget);
817 set_to_cap_if_null(ops, capset_check);
818 set_to_cap_if_null(ops, capset_set);
819 set_to_cap_if_null(ops, acct);
820 set_to_cap_if_null(ops, capable);
821 set_to_cap_if_null(ops, quotactl);
822 set_to_cap_if_null(ops, quota_on);
823 set_to_cap_if_null(ops, sysctl);
824 set_to_cap_if_null(ops, syslog);
825 set_to_cap_if_null(ops, settime);
826 set_to_cap_if_null(ops, vm_enough_memory);
827 set_to_cap_if_null(ops, bprm_alloc_security);
828 set_to_cap_if_null(ops, bprm_free_security);
829 set_to_cap_if_null(ops, bprm_apply_creds);
830 set_to_cap_if_null(ops, bprm_post_apply_creds);
831 set_to_cap_if_null(ops, bprm_set_security);
832 set_to_cap_if_null(ops, bprm_check_security);
833 set_to_cap_if_null(ops, bprm_secureexec);
834 set_to_cap_if_null(ops, sb_alloc_security);
835 set_to_cap_if_null(ops, sb_free_security);
836 set_to_cap_if_null(ops, sb_copy_data);
837 set_to_cap_if_null(ops, sb_kern_mount);
838 set_to_cap_if_null(ops, sb_show_options);
839 set_to_cap_if_null(ops, sb_statfs);
840 set_to_cap_if_null(ops, sb_mount);
841 set_to_cap_if_null(ops, sb_check_sb);
842 set_to_cap_if_null(ops, sb_umount);
843 set_to_cap_if_null(ops, sb_umount_close);
844 set_to_cap_if_null(ops, sb_umount_busy);
845 set_to_cap_if_null(ops, sb_post_remount);
846 set_to_cap_if_null(ops, sb_post_addmount);
847 set_to_cap_if_null(ops, sb_pivotroot);
848 set_to_cap_if_null(ops, sb_post_pivotroot);
849 set_to_cap_if_null(ops, sb_set_mnt_opts);
850 set_to_cap_if_null(ops, sb_clone_mnt_opts);
851 set_to_cap_if_null(ops, sb_parse_opts_str);
852 set_to_cap_if_null(ops, inode_alloc_security);
853 set_to_cap_if_null(ops, inode_free_security);
854 set_to_cap_if_null(ops, inode_init_security);
855 set_to_cap_if_null(ops, inode_create);
856 set_to_cap_if_null(ops, inode_link);
857 set_to_cap_if_null(ops, inode_unlink);
858 set_to_cap_if_null(ops, inode_symlink);
859 set_to_cap_if_null(ops, inode_mkdir);
860 set_to_cap_if_null(ops, inode_rmdir);
861 set_to_cap_if_null(ops, inode_mknod);
862 set_to_cap_if_null(ops, inode_rename);
863 set_to_cap_if_null(ops, inode_readlink);
864 set_to_cap_if_null(ops, inode_follow_link);
865 set_to_cap_if_null(ops, inode_permission);
866 set_to_cap_if_null(ops, inode_setattr);
867 set_to_cap_if_null(ops, inode_getattr);
868 set_to_cap_if_null(ops, inode_delete);
869 set_to_cap_if_null(ops, inode_setxattr);
870 set_to_cap_if_null(ops, inode_post_setxattr);
871 set_to_cap_if_null(ops, inode_getxattr);
872 set_to_cap_if_null(ops, inode_listxattr);
873 set_to_cap_if_null(ops, inode_removexattr);
874 set_to_cap_if_null(ops, inode_need_killpriv);
875 set_to_cap_if_null(ops, inode_killpriv);
876 set_to_cap_if_null(ops, inode_getsecurity);
877 set_to_cap_if_null(ops, inode_setsecurity);
878 set_to_cap_if_null(ops, inode_listsecurity);
879 set_to_cap_if_null(ops, inode_getsecid);
880 set_to_cap_if_null(ops, file_permission);
881 set_to_cap_if_null(ops, file_alloc_security);
882 set_to_cap_if_null(ops, file_free_security);
883 set_to_cap_if_null(ops, file_ioctl);
884 set_to_cap_if_null(ops, file_mmap);
885 set_to_cap_if_null(ops, file_mprotect);
886 set_to_cap_if_null(ops, file_lock);
887 set_to_cap_if_null(ops, file_fcntl);
888 set_to_cap_if_null(ops, file_set_fowner);
889 set_to_cap_if_null(ops, file_send_sigiotask);
890 set_to_cap_if_null(ops, file_receive);
891 set_to_cap_if_null(ops, dentry_open);
892 set_to_cap_if_null(ops, task_create);
893 set_to_cap_if_null(ops, task_alloc_security);
894 set_to_cap_if_null(ops, task_free_security);
895 set_to_cap_if_null(ops, task_setuid);
896 set_to_cap_if_null(ops, task_post_setuid);
897 set_to_cap_if_null(ops, task_setgid);
898 set_to_cap_if_null(ops, task_setpgid);
899 set_to_cap_if_null(ops, task_getpgid);
900 set_to_cap_if_null(ops, task_getsid);
901 set_to_cap_if_null(ops, task_getsecid);
902 set_to_cap_if_null(ops, task_setgroups);
903 set_to_cap_if_null(ops, task_setnice);
904 set_to_cap_if_null(ops, task_setioprio);
905 set_to_cap_if_null(ops, task_getioprio);
906 set_to_cap_if_null(ops, task_setrlimit);
907 set_to_cap_if_null(ops, task_setscheduler);
908 set_to_cap_if_null(ops, task_getscheduler);
909 set_to_cap_if_null(ops, task_movememory);
910 set_to_cap_if_null(ops, task_wait);
911 set_to_cap_if_null(ops, task_kill);
912 set_to_cap_if_null(ops, task_prctl);
913 set_to_cap_if_null(ops, task_reparent_to_init);
914 set_to_cap_if_null(ops, task_to_inode);
915 set_to_cap_if_null(ops, ipc_permission);
916 set_to_cap_if_null(ops, ipc_getsecid);
917 set_to_cap_if_null(ops, msg_msg_alloc_security);
918 set_to_cap_if_null(ops, msg_msg_free_security);
919 set_to_cap_if_null(ops, msg_queue_alloc_security);
920 set_to_cap_if_null(ops, msg_queue_free_security);
921 set_to_cap_if_null(ops, msg_queue_associate);
922 set_to_cap_if_null(ops, msg_queue_msgctl);
923 set_to_cap_if_null(ops, msg_queue_msgsnd);
924 set_to_cap_if_null(ops, msg_queue_msgrcv);
925 set_to_cap_if_null(ops, shm_alloc_security);
926 set_to_cap_if_null(ops, shm_free_security);
927 set_to_cap_if_null(ops, shm_associate);
928 set_to_cap_if_null(ops, shm_shmctl);
929 set_to_cap_if_null(ops, shm_shmat);
930 set_to_cap_if_null(ops, sem_alloc_security);
931 set_to_cap_if_null(ops, sem_free_security);
932 set_to_cap_if_null(ops, sem_associate);
933 set_to_cap_if_null(ops, sem_semctl);
934 set_to_cap_if_null(ops, sem_semop);
935 set_to_cap_if_null(ops, netlink_send);
936 set_to_cap_if_null(ops, netlink_recv);
937 set_to_cap_if_null(ops, d_instantiate);
938 set_to_cap_if_null(ops, getprocattr);
939 set_to_cap_if_null(ops, setprocattr);
940 set_to_cap_if_null(ops, secid_to_secctx);
941 set_to_cap_if_null(ops, secctx_to_secid);
942 set_to_cap_if_null(ops, release_secctx);
943#ifdef CONFIG_SECURITY_NETWORK
944 set_to_cap_if_null(ops, unix_stream_connect);
945 set_to_cap_if_null(ops, unix_may_send);
946 set_to_cap_if_null(ops, socket_create);
947 set_to_cap_if_null(ops, socket_post_create);
948 set_to_cap_if_null(ops, socket_bind);
949 set_to_cap_if_null(ops, socket_connect);
950 set_to_cap_if_null(ops, socket_listen);
951 set_to_cap_if_null(ops, socket_accept);
952 set_to_cap_if_null(ops, socket_post_accept);
953 set_to_cap_if_null(ops, socket_sendmsg);
954 set_to_cap_if_null(ops, socket_recvmsg);
955 set_to_cap_if_null(ops, socket_getsockname);
956 set_to_cap_if_null(ops, socket_getpeername);
957 set_to_cap_if_null(ops, socket_setsockopt);
958 set_to_cap_if_null(ops, socket_getsockopt);
959 set_to_cap_if_null(ops, socket_shutdown);
960 set_to_cap_if_null(ops, socket_sock_rcv_skb);
961 set_to_cap_if_null(ops, socket_getpeersec_stream);
962 set_to_cap_if_null(ops, socket_getpeersec_dgram);
963 set_to_cap_if_null(ops, sk_alloc_security);
964 set_to_cap_if_null(ops, sk_free_security);
965 set_to_cap_if_null(ops, sk_clone_security);
966 set_to_cap_if_null(ops, sk_getsecid);
967 set_to_cap_if_null(ops, sock_graft);
968 set_to_cap_if_null(ops, inet_conn_request);
969 set_to_cap_if_null(ops, inet_csk_clone);
970 set_to_cap_if_null(ops, inet_conn_established);
971 set_to_cap_if_null(ops, req_classify_flow);
972#endif /* CONFIG_SECURITY_NETWORK */
973#ifdef CONFIG_SECURITY_NETWORK_XFRM
974 set_to_cap_if_null(ops, xfrm_policy_alloc_security);
975 set_to_cap_if_null(ops, xfrm_policy_clone_security);
976 set_to_cap_if_null(ops, xfrm_policy_free_security);
977 set_to_cap_if_null(ops, xfrm_policy_delete_security);
978 set_to_cap_if_null(ops, xfrm_state_alloc_security);
979 set_to_cap_if_null(ops, xfrm_state_free_security);
980 set_to_cap_if_null(ops, xfrm_state_delete_security);
981 set_to_cap_if_null(ops, xfrm_policy_lookup);
982 set_to_cap_if_null(ops, xfrm_state_pol_flow_match);
983 set_to_cap_if_null(ops, xfrm_decode_session);
984#endif /* CONFIG_SECURITY_NETWORK_XFRM */
985#ifdef CONFIG_KEYS
986 set_to_cap_if_null(ops, key_alloc);
987 set_to_cap_if_null(ops, key_free);
988 set_to_cap_if_null(ops, key_permission);
989 set_to_cap_if_null(ops, key_getsecurity);
990#endif /* CONFIG_KEYS */
991#ifdef CONFIG_AUDIT
992 set_to_cap_if_null(ops, audit_rule_init);
993 set_to_cap_if_null(ops, audit_rule_known);
994 set_to_cap_if_null(ops, audit_rule_match);
995 set_to_cap_if_null(ops, audit_rule_free);
996#endif
997}
diff --git a/security/commoncap.c b/security/commoncap.c
index 33d343308413..0b6537a3672d 100644
--- a/security/commoncap.c
+++ b/security/commoncap.c
@@ -63,7 +63,8 @@ int cap_settime(struct timespec *ts, struct timezone *tz)
63 return 0; 63 return 0;
64} 64}
65 65
66int cap_ptrace (struct task_struct *parent, struct task_struct *child) 66int cap_ptrace (struct task_struct *parent, struct task_struct *child,
67 unsigned int mode)
67{ 68{
68 /* Derived from arch/i386/kernel/ptrace.c:sys_ptrace. */ 69 /* Derived from arch/i386/kernel/ptrace.c:sys_ptrace. */
69 if (!cap_issubset(child->cap_permitted, parent->cap_permitted) && 70 if (!cap_issubset(child->cap_permitted, parent->cap_permitted) &&
diff --git a/security/dummy.c b/security/dummy.c
deleted file mode 100644
index b8916883b77f..000000000000
--- a/security/dummy.c
+++ /dev/null
@@ -1,1251 +0,0 @@
1/*
2 * Stub functions for the default security function pointers in case no
3 * security model is loaded.
4 *
5 * Copyright (C) 2001 WireX Communications, Inc <chris@wirex.com>
6 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
7 * Copyright (C) 2001 Networks Associates Technology, Inc <ssmalley@nai.com>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 */
14
15#undef DEBUG
16
17#include <linux/capability.h>
18#include <linux/kernel.h>
19#include <linux/mman.h>
20#include <linux/pagemap.h>
21#include <linux/swap.h>
22#include <linux/security.h>
23#include <linux/skbuff.h>
24#include <linux/netlink.h>
25#include <net/sock.h>
26#include <linux/xattr.h>
27#include <linux/hugetlb.h>
28#include <linux/ptrace.h>
29#include <linux/file.h>
30#include <linux/prctl.h>
31#include <linux/securebits.h>
32
33static int dummy_ptrace (struct task_struct *parent, struct task_struct *child)
34{
35 return 0;
36}
37
38static int dummy_capget (struct task_struct *target, kernel_cap_t * effective,
39 kernel_cap_t * inheritable, kernel_cap_t * permitted)
40{
41 if (target->euid == 0) {
42 cap_set_full(*permitted);
43 cap_set_init_eff(*effective);
44 } else {
45 cap_clear(*permitted);
46 cap_clear(*effective);
47 }
48
49 cap_clear(*inheritable);
50
51 if (target->fsuid != 0) {
52 *permitted = cap_drop_fs_set(*permitted);
53 *effective = cap_drop_fs_set(*effective);
54 }
55 return 0;
56}
57
58static int dummy_capset_check (struct task_struct *target,
59 kernel_cap_t * effective,
60 kernel_cap_t * inheritable,
61 kernel_cap_t * permitted)
62{
63 return -EPERM;
64}
65
66static void dummy_capset_set (struct task_struct *target,
67 kernel_cap_t * effective,
68 kernel_cap_t * inheritable,
69 kernel_cap_t * permitted)
70{
71 return;
72}
73
74static int dummy_acct (struct file *file)
75{
76 return 0;
77}
78
79static int dummy_capable (struct task_struct *tsk, int cap)
80{
81 if (cap_raised (tsk->cap_effective, cap))
82 return 0;
83 return -EPERM;
84}
85
86static int dummy_sysctl (ctl_table * table, int op)
87{
88 return 0;
89}
90
91static int dummy_quotactl (int cmds, int type, int id, struct super_block *sb)
92{
93 return 0;
94}
95
96static int dummy_quota_on (struct dentry *dentry)
97{
98 return 0;
99}
100
101static int dummy_syslog (int type)
102{
103 if ((type != 3 && type != 10) && current->euid)
104 return -EPERM;
105 return 0;
106}
107
108static int dummy_settime(struct timespec *ts, struct timezone *tz)
109{
110 if (!capable(CAP_SYS_TIME))
111 return -EPERM;
112 return 0;
113}
114
115static int dummy_vm_enough_memory(struct mm_struct *mm, long pages)
116{
117 int cap_sys_admin = 0;
118
119 if (dummy_capable(current, CAP_SYS_ADMIN) == 0)
120 cap_sys_admin = 1;
121 return __vm_enough_memory(mm, pages, cap_sys_admin);
122}
123
124static int dummy_bprm_alloc_security (struct linux_binprm *bprm)
125{
126 return 0;
127}
128
129static void dummy_bprm_free_security (struct linux_binprm *bprm)
130{
131 return;
132}
133
134static void dummy_bprm_apply_creds (struct linux_binprm *bprm, int unsafe)
135{
136 if (bprm->e_uid != current->uid || bprm->e_gid != current->gid) {
137 set_dumpable(current->mm, suid_dumpable);
138
139 if ((unsafe & ~LSM_UNSAFE_PTRACE_CAP) && !capable(CAP_SETUID)) {
140 bprm->e_uid = current->uid;
141 bprm->e_gid = current->gid;
142 }
143 }
144
145 current->suid = current->euid = current->fsuid = bprm->e_uid;
146 current->sgid = current->egid = current->fsgid = bprm->e_gid;
147
148 dummy_capget(current, &current->cap_effective, &current->cap_inheritable, &current->cap_permitted);
149}
150
151static void dummy_bprm_post_apply_creds (struct linux_binprm *bprm)
152{
153 return;
154}
155
156static int dummy_bprm_set_security (struct linux_binprm *bprm)
157{
158 return 0;
159}
160
161static int dummy_bprm_check_security (struct linux_binprm *bprm)
162{
163 return 0;
164}
165
166static int dummy_bprm_secureexec (struct linux_binprm *bprm)
167{
168 /* The new userland will simply use the value provided
169 in the AT_SECURE field to decide whether secure mode
170 is required. Hence, this logic is required to preserve
171 the legacy decision algorithm used by the old userland. */
172 return (current->euid != current->uid ||
173 current->egid != current->gid);
174}
175
176static int dummy_sb_alloc_security (struct super_block *sb)
177{
178 return 0;
179}
180
181static void dummy_sb_free_security (struct super_block *sb)
182{
183 return;
184}
185
186static int dummy_sb_copy_data (char *orig, char *copy)
187{
188 return 0;
189}
190
191static int dummy_sb_kern_mount (struct super_block *sb, void *data)
192{
193 return 0;
194}
195
196static int dummy_sb_statfs (struct dentry *dentry)
197{
198 return 0;
199}
200
201static int dummy_sb_mount (char *dev_name, struct path *path, char *type,
202 unsigned long flags, void *data)
203{
204 return 0;
205}
206
207static int dummy_sb_check_sb (struct vfsmount *mnt, struct path *path)
208{
209 return 0;
210}
211
212static int dummy_sb_umount (struct vfsmount *mnt, int flags)
213{
214 return 0;
215}
216
217static void dummy_sb_umount_close (struct vfsmount *mnt)
218{
219 return;
220}
221
222static void dummy_sb_umount_busy (struct vfsmount *mnt)
223{
224 return;
225}
226
227static void dummy_sb_post_remount (struct vfsmount *mnt, unsigned long flags,
228 void *data)
229{
230 return;
231}
232
233
234static void dummy_sb_post_addmount (struct vfsmount *mnt, struct path *path)
235{
236 return;
237}
238
239static int dummy_sb_pivotroot (struct path *old_path, struct path *new_path)
240{
241 return 0;
242}
243
244static void dummy_sb_post_pivotroot (struct path *old_path, struct path *new_path)
245{
246 return;
247}
248
249static int dummy_sb_get_mnt_opts(const struct super_block *sb,
250 struct security_mnt_opts *opts)
251{
252 security_init_mnt_opts(opts);
253 return 0;
254}
255
256static int dummy_sb_set_mnt_opts(struct super_block *sb,
257 struct security_mnt_opts *opts)
258{
259 if (unlikely(opts->num_mnt_opts))
260 return -EOPNOTSUPP;
261 return 0;
262}
263
264static void dummy_sb_clone_mnt_opts(const struct super_block *oldsb,
265 struct super_block *newsb)
266{
267 return;
268}
269
270static int dummy_sb_parse_opts_str(char *options, struct security_mnt_opts *opts)
271{
272 return 0;
273}
274
275static int dummy_inode_alloc_security (struct inode *inode)
276{
277 return 0;
278}
279
280static void dummy_inode_free_security (struct inode *inode)
281{
282 return;
283}
284
285static int dummy_inode_init_security (struct inode *inode, struct inode *dir,
286 char **name, void **value, size_t *len)
287{
288 return -EOPNOTSUPP;
289}
290
291static int dummy_inode_create (struct inode *inode, struct dentry *dentry,
292 int mask)
293{
294 return 0;
295}
296
297static int dummy_inode_link (struct dentry *old_dentry, struct inode *inode,
298 struct dentry *new_dentry)
299{
300 return 0;
301}
302
303static int dummy_inode_unlink (struct inode *inode, struct dentry *dentry)
304{
305 return 0;
306}
307
308static int dummy_inode_symlink (struct inode *inode, struct dentry *dentry,
309 const char *name)
310{
311 return 0;
312}
313
314static int dummy_inode_mkdir (struct inode *inode, struct dentry *dentry,
315 int mask)
316{
317 return 0;
318}
319
320static int dummy_inode_rmdir (struct inode *inode, struct dentry *dentry)
321{
322 return 0;
323}
324
325static int dummy_inode_mknod (struct inode *inode, struct dentry *dentry,
326 int mode, dev_t dev)
327{
328 return 0;
329}
330
331static int dummy_inode_rename (struct inode *old_inode,
332 struct dentry *old_dentry,
333 struct inode *new_inode,
334 struct dentry *new_dentry)
335{
336 return 0;
337}
338
339static int dummy_inode_readlink (struct dentry *dentry)
340{
341 return 0;
342}
343
344static int dummy_inode_follow_link (struct dentry *dentry,
345 struct nameidata *nameidata)
346{
347 return 0;
348}
349
350static int dummy_inode_permission (struct inode *inode, int mask, struct nameidata *nd)
351{
352 return 0;
353}
354
355static int dummy_inode_setattr (struct dentry *dentry, struct iattr *iattr)
356{
357 return 0;
358}
359
360static int dummy_inode_getattr (struct vfsmount *mnt, struct dentry *dentry)
361{
362 return 0;
363}
364
365static void dummy_inode_delete (struct inode *ino)
366{
367 return;
368}
369
370static int dummy_inode_setxattr (struct dentry *dentry, const char *name,
371 const void *value, size_t size, int flags)
372{
373 if (!strncmp(name, XATTR_SECURITY_PREFIX,
374 sizeof(XATTR_SECURITY_PREFIX) - 1) &&
375 !capable(CAP_SYS_ADMIN))
376 return -EPERM;
377 return 0;
378}
379
380static void dummy_inode_post_setxattr (struct dentry *dentry, const char *name,
381 const void *value, size_t size,
382 int flags)
383{
384}
385
386static int dummy_inode_getxattr (struct dentry *dentry, const char *name)
387{
388 return 0;
389}
390
391static int dummy_inode_listxattr (struct dentry *dentry)
392{
393 return 0;
394}
395
396static int dummy_inode_removexattr (struct dentry *dentry, const char *name)
397{
398 if (!strncmp(name, XATTR_SECURITY_PREFIX,
399 sizeof(XATTR_SECURITY_PREFIX) - 1) &&
400 !capable(CAP_SYS_ADMIN))
401 return -EPERM;
402 return 0;
403}
404
405static int dummy_inode_need_killpriv(struct dentry *dentry)
406{
407 return 0;
408}
409
410static int dummy_inode_killpriv(struct dentry *dentry)
411{
412 return 0;
413}
414
415static int dummy_inode_getsecurity(const struct inode *inode, const char *name, void **buffer, bool alloc)
416{
417 return -EOPNOTSUPP;
418}
419
420static int dummy_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags)
421{
422 return -EOPNOTSUPP;
423}
424
425static int dummy_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size)
426{
427 return 0;
428}
429
430static void dummy_inode_getsecid(const struct inode *inode, u32 *secid)
431{
432 *secid = 0;
433}
434
435static int dummy_file_permission (struct file *file, int mask)
436{
437 return 0;
438}
439
440static int dummy_file_alloc_security (struct file *file)
441{
442 return 0;
443}
444
445static void dummy_file_free_security (struct file *file)
446{
447 return;
448}
449
450static int dummy_file_ioctl (struct file *file, unsigned int command,
451 unsigned long arg)
452{
453 return 0;
454}
455
456static int dummy_file_mmap (struct file *file, unsigned long reqprot,
457 unsigned long prot,
458 unsigned long flags,
459 unsigned long addr,
460 unsigned long addr_only)
461{
462 if ((addr < mmap_min_addr) && !capable(CAP_SYS_RAWIO))
463 return -EACCES;
464 return 0;
465}
466
467static int dummy_file_mprotect (struct vm_area_struct *vma,
468 unsigned long reqprot,
469 unsigned long prot)
470{
471 return 0;
472}
473
474static int dummy_file_lock (struct file *file, unsigned int cmd)
475{
476 return 0;
477}
478
479static int dummy_file_fcntl (struct file *file, unsigned int cmd,
480 unsigned long arg)
481{
482 return 0;
483}
484
485static int dummy_file_set_fowner (struct file *file)
486{
487 return 0;
488}
489
490static int dummy_file_send_sigiotask (struct task_struct *tsk,
491 struct fown_struct *fown, int sig)
492{
493 return 0;
494}
495
496static int dummy_file_receive (struct file *file)
497{
498 return 0;
499}
500
501static int dummy_dentry_open (struct file *file)
502{
503 return 0;
504}
505
506static int dummy_task_create (unsigned long clone_flags)
507{
508 return 0;
509}
510
511static int dummy_task_alloc_security (struct task_struct *p)
512{
513 return 0;
514}
515
516static void dummy_task_free_security (struct task_struct *p)
517{
518 return;
519}
520
521static int dummy_task_setuid (uid_t id0, uid_t id1, uid_t id2, int flags)
522{
523 return 0;
524}
525
526static int dummy_task_post_setuid (uid_t id0, uid_t id1, uid_t id2, int flags)
527{
528 dummy_capget(current, &current->cap_effective, &current->cap_inheritable, &current->cap_permitted);
529 return 0;
530}
531
532static int dummy_task_setgid (gid_t id0, gid_t id1, gid_t id2, int flags)
533{
534 return 0;
535}
536
537static int dummy_task_setpgid (struct task_struct *p, pid_t pgid)
538{
539 return 0;
540}
541
542static int dummy_task_getpgid (struct task_struct *p)
543{
544 return 0;
545}
546
547static int dummy_task_getsid (struct task_struct *p)
548{
549 return 0;
550}
551
552static void dummy_task_getsecid (struct task_struct *p, u32 *secid)
553{
554 *secid = 0;
555}
556
557static int dummy_task_setgroups (struct group_info *group_info)
558{
559 return 0;
560}
561
562static int dummy_task_setnice (struct task_struct *p, int nice)
563{
564 return 0;
565}
566
567static int dummy_task_setioprio (struct task_struct *p, int ioprio)
568{
569 return 0;
570}
571
572static int dummy_task_getioprio (struct task_struct *p)
573{
574 return 0;
575}
576
577static int dummy_task_setrlimit (unsigned int resource, struct rlimit *new_rlim)
578{
579 return 0;
580}
581
582static int dummy_task_setscheduler (struct task_struct *p, int policy,
583 struct sched_param *lp)
584{
585 return 0;
586}
587
588static int dummy_task_getscheduler (struct task_struct *p)
589{
590 return 0;
591}
592
593static int dummy_task_movememory (struct task_struct *p)
594{
595 return 0;
596}
597
598static int dummy_task_wait (struct task_struct *p)
599{
600 return 0;
601}
602
603static int dummy_task_kill (struct task_struct *p, struct siginfo *info,
604 int sig, u32 secid)
605{
606 return 0;
607}
608
609static int dummy_task_prctl (int option, unsigned long arg2, unsigned long arg3,
610 unsigned long arg4, unsigned long arg5, long *rc_p)
611{
612 switch (option) {
613 case PR_CAPBSET_READ:
614 *rc_p = (cap_valid(arg2) ? 1 : -EINVAL);
615 break;
616 case PR_GET_KEEPCAPS:
617 *rc_p = issecure(SECURE_KEEP_CAPS);
618 break;
619 case PR_SET_KEEPCAPS:
620 if (arg2 > 1)
621 *rc_p = -EINVAL;
622 else if (arg2)
623 current->securebits |= issecure_mask(SECURE_KEEP_CAPS);
624 else
625 current->securebits &=
626 ~issecure_mask(SECURE_KEEP_CAPS);
627 break;
628 default:
629 return 0;
630 }
631
632 return 1;
633}
634
635static void dummy_task_reparent_to_init (struct task_struct *p)
636{
637 p->euid = p->fsuid = 0;
638 return;
639}
640
641static void dummy_task_to_inode(struct task_struct *p, struct inode *inode)
642{ }
643
644static int dummy_ipc_permission (struct kern_ipc_perm *ipcp, short flag)
645{
646 return 0;
647}
648
649static void dummy_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid)
650{
651 *secid = 0;
652}
653
654static int dummy_msg_msg_alloc_security (struct msg_msg *msg)
655{
656 return 0;
657}
658
659static void dummy_msg_msg_free_security (struct msg_msg *msg)
660{
661 return;
662}
663
664static int dummy_msg_queue_alloc_security (struct msg_queue *msq)
665{
666 return 0;
667}
668
669static void dummy_msg_queue_free_security (struct msg_queue *msq)
670{
671 return;
672}
673
674static int dummy_msg_queue_associate (struct msg_queue *msq,
675 int msqflg)
676{
677 return 0;
678}
679
680static int dummy_msg_queue_msgctl (struct msg_queue *msq, int cmd)
681{
682 return 0;
683}
684
685static int dummy_msg_queue_msgsnd (struct msg_queue *msq, struct msg_msg *msg,
686 int msgflg)
687{
688 return 0;
689}
690
691static int dummy_msg_queue_msgrcv (struct msg_queue *msq, struct msg_msg *msg,
692 struct task_struct *target, long type,
693 int mode)
694{
695 return 0;
696}
697
698static int dummy_shm_alloc_security (struct shmid_kernel *shp)
699{
700 return 0;
701}
702
703static void dummy_shm_free_security (struct shmid_kernel *shp)
704{
705 return;
706}
707
708static int dummy_shm_associate (struct shmid_kernel *shp, int shmflg)
709{
710 return 0;
711}
712
713static int dummy_shm_shmctl (struct shmid_kernel *shp, int cmd)
714{
715 return 0;
716}
717
718static int dummy_shm_shmat (struct shmid_kernel *shp, char __user *shmaddr,
719 int shmflg)
720{
721 return 0;
722}
723
724static int dummy_sem_alloc_security (struct sem_array *sma)
725{
726 return 0;
727}
728
729static void dummy_sem_free_security (struct sem_array *sma)
730{
731 return;
732}
733
734static int dummy_sem_associate (struct sem_array *sma, int semflg)
735{
736 return 0;
737}
738
739static int dummy_sem_semctl (struct sem_array *sma, int cmd)
740{
741 return 0;
742}
743
744static int dummy_sem_semop (struct sem_array *sma,
745 struct sembuf *sops, unsigned nsops, int alter)
746{
747 return 0;
748}
749
750static int dummy_netlink_send (struct sock *sk, struct sk_buff *skb)
751{
752 NETLINK_CB(skb).eff_cap = current->cap_effective;
753 return 0;
754}
755
756static int dummy_netlink_recv (struct sk_buff *skb, int cap)
757{
758 if (!cap_raised (NETLINK_CB (skb).eff_cap, cap))
759 return -EPERM;
760 return 0;
761}
762
763#ifdef CONFIG_SECURITY_NETWORK
764static int dummy_unix_stream_connect (struct socket *sock,
765 struct socket *other,
766 struct sock *newsk)
767{
768 return 0;
769}
770
771static int dummy_unix_may_send (struct socket *sock,
772 struct socket *other)
773{
774 return 0;
775}
776
777static int dummy_socket_create (int family, int type,
778 int protocol, int kern)
779{
780 return 0;
781}
782
783static int dummy_socket_post_create (struct socket *sock, int family, int type,
784 int protocol, int kern)
785{
786 return 0;
787}
788
789static int dummy_socket_bind (struct socket *sock, struct sockaddr *address,
790 int addrlen)
791{
792 return 0;
793}
794
795static int dummy_socket_connect (struct socket *sock, struct sockaddr *address,
796 int addrlen)
797{
798 return 0;
799}
800
801static int dummy_socket_listen (struct socket *sock, int backlog)
802{
803 return 0;
804}
805
806static int dummy_socket_accept (struct socket *sock, struct socket *newsock)
807{
808 return 0;
809}
810
811static void dummy_socket_post_accept (struct socket *sock,
812 struct socket *newsock)
813{
814 return;
815}
816
817static int dummy_socket_sendmsg (struct socket *sock, struct msghdr *msg,
818 int size)
819{
820 return 0;
821}
822
823static int dummy_socket_recvmsg (struct socket *sock, struct msghdr *msg,
824 int size, int flags)
825{
826 return 0;
827}
828
829static int dummy_socket_getsockname (struct socket *sock)
830{
831 return 0;
832}
833
834static int dummy_socket_getpeername (struct socket *sock)
835{
836 return 0;
837}
838
839static int dummy_socket_setsockopt (struct socket *sock, int level, int optname)
840{
841 return 0;
842}
843
844static int dummy_socket_getsockopt (struct socket *sock, int level, int optname)
845{
846 return 0;
847}
848
849static int dummy_socket_shutdown (struct socket *sock, int how)
850{
851 return 0;
852}
853
854static int dummy_socket_sock_rcv_skb (struct sock *sk, struct sk_buff *skb)
855{
856 return 0;
857}
858
859static int dummy_socket_getpeersec_stream(struct socket *sock, char __user *optval,
860 int __user *optlen, unsigned len)
861{
862 return -ENOPROTOOPT;
863}
864
865static int dummy_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb, u32 *secid)
866{
867 return -ENOPROTOOPT;
868}
869
870static inline int dummy_sk_alloc_security (struct sock *sk, int family, gfp_t priority)
871{
872 return 0;
873}
874
875static inline void dummy_sk_free_security (struct sock *sk)
876{
877}
878
879static inline void dummy_sk_clone_security (const struct sock *sk, struct sock *newsk)
880{
881}
882
883static inline void dummy_sk_getsecid(struct sock *sk, u32 *secid)
884{
885}
886
887static inline void dummy_sock_graft(struct sock* sk, struct socket *parent)
888{
889}
890
891static inline int dummy_inet_conn_request(struct sock *sk,
892 struct sk_buff *skb, struct request_sock *req)
893{
894 return 0;
895}
896
897static inline void dummy_inet_csk_clone(struct sock *newsk,
898 const struct request_sock *req)
899{
900}
901
902static inline void dummy_inet_conn_established(struct sock *sk,
903 struct sk_buff *skb)
904{
905}
906
907static inline void dummy_req_classify_flow(const struct request_sock *req,
908 struct flowi *fl)
909{
910}
911#endif /* CONFIG_SECURITY_NETWORK */
912
913#ifdef CONFIG_SECURITY_NETWORK_XFRM
914static int dummy_xfrm_policy_alloc_security(struct xfrm_sec_ctx **ctxp,
915 struct xfrm_user_sec_ctx *sec_ctx)
916{
917 return 0;
918}
919
920static inline int dummy_xfrm_policy_clone_security(struct xfrm_sec_ctx *old_ctx,
921 struct xfrm_sec_ctx **new_ctxp)
922{
923 return 0;
924}
925
926static void dummy_xfrm_policy_free_security(struct xfrm_sec_ctx *ctx)
927{
928}
929
930static int dummy_xfrm_policy_delete_security(struct xfrm_sec_ctx *ctx)
931{
932 return 0;
933}
934
935static int dummy_xfrm_state_alloc_security(struct xfrm_state *x,
936 struct xfrm_user_sec_ctx *sec_ctx, u32 secid)
937{
938 return 0;
939}
940
941static void dummy_xfrm_state_free_security(struct xfrm_state *x)
942{
943}
944
945static int dummy_xfrm_state_delete_security(struct xfrm_state *x)
946{
947 return 0;
948}
949
950static int dummy_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx,
951 u32 sk_sid, u8 dir)
952{
953 return 0;
954}
955
956static int dummy_xfrm_state_pol_flow_match(struct xfrm_state *x,
957 struct xfrm_policy *xp, struct flowi *fl)
958{
959 return 1;
960}
961
962static int dummy_xfrm_decode_session(struct sk_buff *skb, u32 *fl, int ckall)
963{
964 return 0;
965}
966
967#endif /* CONFIG_SECURITY_NETWORK_XFRM */
968static int dummy_register_security (const char *name, struct security_operations *ops)
969{
970 return -EINVAL;
971}
972
973static void dummy_d_instantiate (struct dentry *dentry, struct inode *inode)
974{
975 return;
976}
977
978static int dummy_getprocattr(struct task_struct *p, char *name, char **value)
979{
980 return -EINVAL;
981}
982
983static int dummy_setprocattr(struct task_struct *p, char *name, void *value, size_t size)
984{
985 return -EINVAL;
986}
987
988static int dummy_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
989{
990 return -EOPNOTSUPP;
991}
992
993static int dummy_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid)
994{
995 return -EOPNOTSUPP;
996}
997
998static void dummy_release_secctx(char *secdata, u32 seclen)
999{
1000}
1001
1002#ifdef CONFIG_KEYS
1003static inline int dummy_key_alloc(struct key *key, struct task_struct *ctx,
1004 unsigned long flags)
1005{
1006 return 0;
1007}
1008
1009static inline void dummy_key_free(struct key *key)
1010{
1011}
1012
1013static inline int dummy_key_permission(key_ref_t key_ref,
1014 struct task_struct *context,
1015 key_perm_t perm)
1016{
1017 return 0;
1018}
1019
1020static int dummy_key_getsecurity(struct key *key, char **_buffer)
1021{
1022 *_buffer = NULL;
1023 return 0;
1024}
1025
1026#endif /* CONFIG_KEYS */
1027
1028#ifdef CONFIG_AUDIT
1029static inline int dummy_audit_rule_init(u32 field, u32 op, char *rulestr,
1030 void **lsmrule)
1031{
1032 return 0;
1033}
1034
1035static inline int dummy_audit_rule_known(struct audit_krule *krule)
1036{
1037 return 0;
1038}
1039
1040static inline int dummy_audit_rule_match(u32 secid, u32 field, u32 op,
1041 void *lsmrule,
1042 struct audit_context *actx)
1043{
1044 return 0;
1045}
1046
1047static inline void dummy_audit_rule_free(void *lsmrule)
1048{ }
1049
1050#endif /* CONFIG_AUDIT */
1051
1052struct security_operations dummy_security_ops = {
1053 .name = "dummy",
1054};
1055
1056#define set_to_dummy_if_null(ops, function) \
1057 do { \
1058 if (!ops->function) { \
1059 ops->function = dummy_##function; \
1060 pr_debug("Had to override the " #function \
1061 " security operation with the dummy one.\n");\
1062 } \
1063 } while (0)
1064
1065void security_fixup_ops (struct security_operations *ops)
1066{
1067 set_to_dummy_if_null(ops, ptrace);
1068 set_to_dummy_if_null(ops, capget);
1069 set_to_dummy_if_null(ops, capset_check);
1070 set_to_dummy_if_null(ops, capset_set);
1071 set_to_dummy_if_null(ops, acct);
1072 set_to_dummy_if_null(ops, capable);
1073 set_to_dummy_if_null(ops, quotactl);
1074 set_to_dummy_if_null(ops, quota_on);
1075 set_to_dummy_if_null(ops, sysctl);
1076 set_to_dummy_if_null(ops, syslog);
1077 set_to_dummy_if_null(ops, settime);
1078 set_to_dummy_if_null(ops, vm_enough_memory);
1079 set_to_dummy_if_null(ops, bprm_alloc_security);
1080 set_to_dummy_if_null(ops, bprm_free_security);
1081 set_to_dummy_if_null(ops, bprm_apply_creds);
1082 set_to_dummy_if_null(ops, bprm_post_apply_creds);
1083 set_to_dummy_if_null(ops, bprm_set_security);
1084 set_to_dummy_if_null(ops, bprm_check_security);
1085 set_to_dummy_if_null(ops, bprm_secureexec);
1086 set_to_dummy_if_null(ops, sb_alloc_security);
1087 set_to_dummy_if_null(ops, sb_free_security);
1088 set_to_dummy_if_null(ops, sb_copy_data);
1089 set_to_dummy_if_null(ops, sb_kern_mount);
1090 set_to_dummy_if_null(ops, sb_statfs);
1091 set_to_dummy_if_null(ops, sb_mount);
1092 set_to_dummy_if_null(ops, sb_check_sb);
1093 set_to_dummy_if_null(ops, sb_umount);
1094 set_to_dummy_if_null(ops, sb_umount_close);
1095 set_to_dummy_if_null(ops, sb_umount_busy);
1096 set_to_dummy_if_null(ops, sb_post_remount);
1097 set_to_dummy_if_null(ops, sb_post_addmount);
1098 set_to_dummy_if_null(ops, sb_pivotroot);
1099 set_to_dummy_if_null(ops, sb_post_pivotroot);
1100 set_to_dummy_if_null(ops, sb_get_mnt_opts);
1101 set_to_dummy_if_null(ops, sb_set_mnt_opts);
1102 set_to_dummy_if_null(ops, sb_clone_mnt_opts);
1103 set_to_dummy_if_null(ops, sb_parse_opts_str);
1104 set_to_dummy_if_null(ops, inode_alloc_security);
1105 set_to_dummy_if_null(ops, inode_free_security);
1106 set_to_dummy_if_null(ops, inode_init_security);
1107 set_to_dummy_if_null(ops, inode_create);
1108 set_to_dummy_if_null(ops, inode_link);
1109 set_to_dummy_if_null(ops, inode_unlink);
1110 set_to_dummy_if_null(ops, inode_symlink);
1111 set_to_dummy_if_null(ops, inode_mkdir);
1112 set_to_dummy_if_null(ops, inode_rmdir);
1113 set_to_dummy_if_null(ops, inode_mknod);
1114 set_to_dummy_if_null(ops, inode_rename);
1115 set_to_dummy_if_null(ops, inode_readlink);
1116 set_to_dummy_if_null(ops, inode_follow_link);
1117 set_to_dummy_if_null(ops, inode_permission);
1118 set_to_dummy_if_null(ops, inode_setattr);
1119 set_to_dummy_if_null(ops, inode_getattr);
1120 set_to_dummy_if_null(ops, inode_delete);
1121 set_to_dummy_if_null(ops, inode_setxattr);
1122 set_to_dummy_if_null(ops, inode_post_setxattr);
1123 set_to_dummy_if_null(ops, inode_getxattr);
1124 set_to_dummy_if_null(ops, inode_listxattr);
1125 set_to_dummy_if_null(ops, inode_removexattr);
1126 set_to_dummy_if_null(ops, inode_need_killpriv);
1127 set_to_dummy_if_null(ops, inode_killpriv);
1128 set_to_dummy_if_null(ops, inode_getsecurity);
1129 set_to_dummy_if_null(ops, inode_setsecurity);
1130 set_to_dummy_if_null(ops, inode_listsecurity);
1131 set_to_dummy_if_null(ops, inode_getsecid);
1132 set_to_dummy_if_null(ops, file_permission);
1133 set_to_dummy_if_null(ops, file_alloc_security);
1134 set_to_dummy_if_null(ops, file_free_security);
1135 set_to_dummy_if_null(ops, file_ioctl);
1136 set_to_dummy_if_null(ops, file_mmap);
1137 set_to_dummy_if_null(ops, file_mprotect);
1138 set_to_dummy_if_null(ops, file_lock);
1139 set_to_dummy_if_null(ops, file_fcntl);
1140 set_to_dummy_if_null(ops, file_set_fowner);
1141 set_to_dummy_if_null(ops, file_send_sigiotask);
1142 set_to_dummy_if_null(ops, file_receive);
1143 set_to_dummy_if_null(ops, dentry_open);
1144 set_to_dummy_if_null(ops, task_create);
1145 set_to_dummy_if_null(ops, task_alloc_security);
1146 set_to_dummy_if_null(ops, task_free_security);
1147 set_to_dummy_if_null(ops, task_setuid);
1148 set_to_dummy_if_null(ops, task_post_setuid);
1149 set_to_dummy_if_null(ops, task_setgid);
1150 set_to_dummy_if_null(ops, task_setpgid);
1151 set_to_dummy_if_null(ops, task_getpgid);
1152 set_to_dummy_if_null(ops, task_getsid);
1153 set_to_dummy_if_null(ops, task_getsecid);
1154 set_to_dummy_if_null(ops, task_setgroups);
1155 set_to_dummy_if_null(ops, task_setnice);
1156 set_to_dummy_if_null(ops, task_setioprio);
1157 set_to_dummy_if_null(ops, task_getioprio);
1158 set_to_dummy_if_null(ops, task_setrlimit);
1159 set_to_dummy_if_null(ops, task_setscheduler);
1160 set_to_dummy_if_null(ops, task_getscheduler);
1161 set_to_dummy_if_null(ops, task_movememory);
1162 set_to_dummy_if_null(ops, task_wait);
1163 set_to_dummy_if_null(ops, task_kill);
1164 set_to_dummy_if_null(ops, task_prctl);
1165 set_to_dummy_if_null(ops, task_reparent_to_init);
1166 set_to_dummy_if_null(ops, task_to_inode);
1167 set_to_dummy_if_null(ops, ipc_permission);
1168 set_to_dummy_if_null(ops, ipc_getsecid);
1169 set_to_dummy_if_null(ops, msg_msg_alloc_security);
1170 set_to_dummy_if_null(ops, msg_msg_free_security);
1171 set_to_dummy_if_null(ops, msg_queue_alloc_security);
1172 set_to_dummy_if_null(ops, msg_queue_free_security);
1173 set_to_dummy_if_null(ops, msg_queue_associate);
1174 set_to_dummy_if_null(ops, msg_queue_msgctl);
1175 set_to_dummy_if_null(ops, msg_queue_msgsnd);
1176 set_to_dummy_if_null(ops, msg_queue_msgrcv);
1177 set_to_dummy_if_null(ops, shm_alloc_security);
1178 set_to_dummy_if_null(ops, shm_free_security);
1179 set_to_dummy_if_null(ops, shm_associate);
1180 set_to_dummy_if_null(ops, shm_shmctl);
1181 set_to_dummy_if_null(ops, shm_shmat);
1182 set_to_dummy_if_null(ops, sem_alloc_security);
1183 set_to_dummy_if_null(ops, sem_free_security);
1184 set_to_dummy_if_null(ops, sem_associate);
1185 set_to_dummy_if_null(ops, sem_semctl);
1186 set_to_dummy_if_null(ops, sem_semop);
1187 set_to_dummy_if_null(ops, netlink_send);
1188 set_to_dummy_if_null(ops, netlink_recv);
1189 set_to_dummy_if_null(ops, register_security);
1190 set_to_dummy_if_null(ops, d_instantiate);
1191 set_to_dummy_if_null(ops, getprocattr);
1192 set_to_dummy_if_null(ops, setprocattr);
1193 set_to_dummy_if_null(ops, secid_to_secctx);
1194 set_to_dummy_if_null(ops, secctx_to_secid);
1195 set_to_dummy_if_null(ops, release_secctx);
1196#ifdef CONFIG_SECURITY_NETWORK
1197 set_to_dummy_if_null(ops, unix_stream_connect);
1198 set_to_dummy_if_null(ops, unix_may_send);
1199 set_to_dummy_if_null(ops, socket_create);
1200 set_to_dummy_if_null(ops, socket_post_create);
1201 set_to_dummy_if_null(ops, socket_bind);
1202 set_to_dummy_if_null(ops, socket_connect);
1203 set_to_dummy_if_null(ops, socket_listen);
1204 set_to_dummy_if_null(ops, socket_accept);
1205 set_to_dummy_if_null(ops, socket_post_accept);
1206 set_to_dummy_if_null(ops, socket_sendmsg);
1207 set_to_dummy_if_null(ops, socket_recvmsg);
1208 set_to_dummy_if_null(ops, socket_getsockname);
1209 set_to_dummy_if_null(ops, socket_getpeername);
1210 set_to_dummy_if_null(ops, socket_setsockopt);
1211 set_to_dummy_if_null(ops, socket_getsockopt);
1212 set_to_dummy_if_null(ops, socket_shutdown);
1213 set_to_dummy_if_null(ops, socket_sock_rcv_skb);
1214 set_to_dummy_if_null(ops, socket_getpeersec_stream);
1215 set_to_dummy_if_null(ops, socket_getpeersec_dgram);
1216 set_to_dummy_if_null(ops, sk_alloc_security);
1217 set_to_dummy_if_null(ops, sk_free_security);
1218 set_to_dummy_if_null(ops, sk_clone_security);
1219 set_to_dummy_if_null(ops, sk_getsecid);
1220 set_to_dummy_if_null(ops, sock_graft);
1221 set_to_dummy_if_null(ops, inet_conn_request);
1222 set_to_dummy_if_null(ops, inet_csk_clone);
1223 set_to_dummy_if_null(ops, inet_conn_established);
1224 set_to_dummy_if_null(ops, req_classify_flow);
1225 #endif /* CONFIG_SECURITY_NETWORK */
1226#ifdef CONFIG_SECURITY_NETWORK_XFRM
1227 set_to_dummy_if_null(ops, xfrm_policy_alloc_security);
1228 set_to_dummy_if_null(ops, xfrm_policy_clone_security);
1229 set_to_dummy_if_null(ops, xfrm_policy_free_security);
1230 set_to_dummy_if_null(ops, xfrm_policy_delete_security);
1231 set_to_dummy_if_null(ops, xfrm_state_alloc_security);
1232 set_to_dummy_if_null(ops, xfrm_state_free_security);
1233 set_to_dummy_if_null(ops, xfrm_state_delete_security);
1234 set_to_dummy_if_null(ops, xfrm_policy_lookup);
1235 set_to_dummy_if_null(ops, xfrm_state_pol_flow_match);
1236 set_to_dummy_if_null(ops, xfrm_decode_session);
1237#endif /* CONFIG_SECURITY_NETWORK_XFRM */
1238#ifdef CONFIG_KEYS
1239 set_to_dummy_if_null(ops, key_alloc);
1240 set_to_dummy_if_null(ops, key_free);
1241 set_to_dummy_if_null(ops, key_permission);
1242 set_to_dummy_if_null(ops, key_getsecurity);
1243#endif /* CONFIG_KEYS */
1244#ifdef CONFIG_AUDIT
1245 set_to_dummy_if_null(ops, audit_rule_init);
1246 set_to_dummy_if_null(ops, audit_rule_known);
1247 set_to_dummy_if_null(ops, audit_rule_match);
1248 set_to_dummy_if_null(ops, audit_rule_free);
1249#endif
1250}
1251
diff --git a/security/root_plug.c b/security/root_plug.c
index a41cf42a4fa0..be0ebec2580b 100644
--- a/security/root_plug.c
+++ b/security/root_plug.c
@@ -28,9 +28,6 @@
28#include <linux/usb.h> 28#include <linux/usb.h>
29#include <linux/moduleparam.h> 29#include <linux/moduleparam.h>
30 30
31/* flag to keep track of how we were registered */
32static int secondary;
33
34/* default is a generic type of usb to serial converter */ 31/* default is a generic type of usb to serial converter */
35static int vendor_id = 0x0557; 32static int vendor_id = 0x0557;
36static int product_id = 0x2008; 33static int product_id = 0x2008;
@@ -97,13 +94,7 @@ static int __init rootplug_init (void)
97 if (register_security (&rootplug_security_ops)) { 94 if (register_security (&rootplug_security_ops)) {
98 printk (KERN_INFO 95 printk (KERN_INFO
99 "Failure registering Root Plug module with the kernel\n"); 96 "Failure registering Root Plug module with the kernel\n");
100 /* try registering with primary module */
101 if (mod_reg_security (MY_NAME, &rootplug_security_ops)) {
102 printk (KERN_INFO "Failure registering Root Plug "
103 " module with primary security module.\n");
104 return -EINVAL; 97 return -EINVAL;
105 }
106 secondary = 1;
107 } 98 }
108 printk (KERN_INFO "Root Plug module initialized, " 99 printk (KERN_INFO "Root Plug module initialized, "
109 "vendor_id = %4.4x, product id = %4.4x\n", vendor_id, product_id); 100 "vendor_id = %4.4x, product id = %4.4x\n", vendor_id, product_id);
diff --git a/security/security.c b/security/security.c
index 59838a99b80e..59f23b5918b3 100644
--- a/security/security.c
+++ b/security/security.c
@@ -20,8 +20,8 @@
20/* Boot-time LSM user choice */ 20/* Boot-time LSM user choice */
21static __initdata char chosen_lsm[SECURITY_NAME_MAX + 1]; 21static __initdata char chosen_lsm[SECURITY_NAME_MAX + 1];
22 22
23/* things that live in dummy.c */ 23/* things that live in capability.c */
24extern struct security_operations dummy_security_ops; 24extern struct security_operations default_security_ops;
25extern void security_fixup_ops(struct security_operations *ops); 25extern void security_fixup_ops(struct security_operations *ops);
26 26
27struct security_operations *security_ops; /* Initialized to NULL */ 27struct security_operations *security_ops; /* Initialized to NULL */
@@ -57,13 +57,8 @@ int __init security_init(void)
57{ 57{
58 printk(KERN_INFO "Security Framework initialized\n"); 58 printk(KERN_INFO "Security Framework initialized\n");
59 59
60 if (verify(&dummy_security_ops)) { 60 security_fixup_ops(&default_security_ops);
61 printk(KERN_ERR "%s could not verify " 61 security_ops = &default_security_ops;
62 "dummy_security_ops structure.\n", __func__);
63 return -EIO;
64 }
65
66 security_ops = &dummy_security_ops;
67 do_security_initcalls(); 62 do_security_initcalls();
68 63
69 return 0; 64 return 0;
@@ -122,7 +117,7 @@ int register_security(struct security_operations *ops)
122 return -EINVAL; 117 return -EINVAL;
123 } 118 }
124 119
125 if (security_ops != &dummy_security_ops) 120 if (security_ops != &default_security_ops)
126 return -EAGAIN; 121 return -EAGAIN;
127 122
128 security_ops = ops; 123 security_ops = ops;
@@ -130,40 +125,12 @@ int register_security(struct security_operations *ops)
130 return 0; 125 return 0;
131} 126}
132 127
133/**
134 * mod_reg_security - allows security modules to be "stacked"
135 * @name: a pointer to a string with the name of the security_options to be registered
136 * @ops: a pointer to the struct security_options that is to be registered
137 *
138 * This function allows security modules to be stacked if the currently loaded
139 * security module allows this to happen. It passes the @name and @ops to the
140 * register_security function of the currently loaded security module.
141 *
142 * The return value depends on the currently loaded security module, with 0 as
143 * success.
144 */
145int mod_reg_security(const char *name, struct security_operations *ops)
146{
147 if (verify(ops)) {
148 printk(KERN_INFO "%s could not verify "
149 "security operations.\n", __func__);
150 return -EINVAL;
151 }
152
153 if (ops == security_ops) {
154 printk(KERN_INFO "%s security operations "
155 "already registered.\n", __func__);
156 return -EINVAL;
157 }
158
159 return security_ops->register_security(name, ops);
160}
161
162/* Security operations */ 128/* Security operations */
163 129
164int security_ptrace(struct task_struct *parent, struct task_struct *child) 130int security_ptrace(struct task_struct *parent, struct task_struct *child,
131 unsigned int mode)
165{ 132{
166 return security_ops->ptrace(parent, child); 133 return security_ops->ptrace(parent, child, mode);
167} 134}
168 135
169int security_capget(struct task_struct *target, 136int security_capget(struct task_struct *target,
@@ -291,6 +258,11 @@ int security_sb_kern_mount(struct super_block *sb, void *data)
291 return security_ops->sb_kern_mount(sb, data); 258 return security_ops->sb_kern_mount(sb, data);
292} 259}
293 260
261int security_sb_show_options(struct seq_file *m, struct super_block *sb)
262{
263 return security_ops->sb_show_options(m, sb);
264}
265
294int security_sb_statfs(struct dentry *dentry) 266int security_sb_statfs(struct dentry *dentry)
295{ 267{
296 return security_ops->sb_statfs(dentry); 268 return security_ops->sb_statfs(dentry);
@@ -342,12 +314,6 @@ void security_sb_post_pivotroot(struct path *old_path, struct path *new_path)
342 security_ops->sb_post_pivotroot(old_path, new_path); 314 security_ops->sb_post_pivotroot(old_path, new_path);
343} 315}
344 316
345int security_sb_get_mnt_opts(const struct super_block *sb,
346 struct security_mnt_opts *opts)
347{
348 return security_ops->sb_get_mnt_opts(sb, opts);
349}
350
351int security_sb_set_mnt_opts(struct super_block *sb, 317int security_sb_set_mnt_opts(struct super_block *sb,
352 struct security_mnt_opts *opts) 318 struct security_mnt_opts *opts)
353{ 319{
@@ -894,7 +860,7 @@ EXPORT_SYMBOL(security_secctx_to_secid);
894 860
895void security_release_secctx(char *secdata, u32 seclen) 861void security_release_secctx(char *secdata, u32 seclen)
896{ 862{
897 return security_ops->release_secctx(secdata, seclen); 863 security_ops->release_secctx(secdata, seclen);
898} 864}
899EXPORT_SYMBOL(security_release_secctx); 865EXPORT_SYMBOL(security_release_secctx);
900 866
@@ -1011,12 +977,12 @@ int security_sk_alloc(struct sock *sk, int family, gfp_t priority)
1011 977
1012void security_sk_free(struct sock *sk) 978void security_sk_free(struct sock *sk)
1013{ 979{
1014 return security_ops->sk_free_security(sk); 980 security_ops->sk_free_security(sk);
1015} 981}
1016 982
1017void security_sk_clone(const struct sock *sk, struct sock *newsk) 983void security_sk_clone(const struct sock *sk, struct sock *newsk)
1018{ 984{
1019 return security_ops->sk_clone_security(sk, newsk); 985 security_ops->sk_clone_security(sk, newsk);
1020} 986}
1021 987
1022void security_sk_classify_flow(struct sock *sk, struct flowi *fl) 988void security_sk_classify_flow(struct sock *sk, struct flowi *fl)
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 1c864c0efe2b..91200feb3f9c 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -9,7 +9,8 @@
9 * James Morris <jmorris@redhat.com> 9 * James Morris <jmorris@redhat.com>
10 * 10 *
11 * Copyright (C) 2001,2002 Networks Associates Technology, Inc. 11 * Copyright (C) 2001,2002 Networks Associates Technology, Inc.
12 * Copyright (C) 2003 Red Hat, Inc., James Morris <jmorris@redhat.com> 12 * Copyright (C) 2003-2008 Red Hat, Inc., James Morris <jmorris@redhat.com>
13 * Eric Paris <eparis@redhat.com>
13 * Copyright (C) 2004-2005 Trusted Computer Solutions, Inc. 14 * Copyright (C) 2004-2005 Trusted Computer Solutions, Inc.
14 * <dgoeddel@trustedcs.com> 15 * <dgoeddel@trustedcs.com>
15 * Copyright (C) 2006, 2007 Hewlett-Packard Development Company, L.P. 16 * Copyright (C) 2006, 2007 Hewlett-Packard Development Company, L.P.
@@ -42,9 +43,7 @@
42#include <linux/fdtable.h> 43#include <linux/fdtable.h>
43#include <linux/namei.h> 44#include <linux/namei.h>
44#include <linux/mount.h> 45#include <linux/mount.h>
45#include <linux/ext2_fs.h>
46#include <linux/proc_fs.h> 46#include <linux/proc_fs.h>
47#include <linux/kd.h>
48#include <linux/netfilter_ipv4.h> 47#include <linux/netfilter_ipv4.h>
49#include <linux/netfilter_ipv6.h> 48#include <linux/netfilter_ipv6.h>
50#include <linux/tty.h> 49#include <linux/tty.h>
@@ -53,7 +52,7 @@
53#include <net/tcp.h> /* struct or_callable used in sock_rcv_skb */ 52#include <net/tcp.h> /* struct or_callable used in sock_rcv_skb */
54#include <net/net_namespace.h> 53#include <net/net_namespace.h>
55#include <net/netlabel.h> 54#include <net/netlabel.h>
56#include <asm/uaccess.h> 55#include <linux/uaccess.h>
57#include <asm/ioctls.h> 56#include <asm/ioctls.h>
58#include <asm/atomic.h> 57#include <asm/atomic.h>
59#include <linux/bitops.h> 58#include <linux/bitops.h>
@@ -104,7 +103,9 @@ int selinux_enforcing;
104 103
105static int __init enforcing_setup(char *str) 104static int __init enforcing_setup(char *str)
106{ 105{
107 selinux_enforcing = simple_strtol(str, NULL, 0); 106 unsigned long enforcing;
107 if (!strict_strtoul(str, 0, &enforcing))
108 selinux_enforcing = enforcing ? 1 : 0;
108 return 1; 109 return 1;
109} 110}
110__setup("enforcing=", enforcing_setup); 111__setup("enforcing=", enforcing_setup);
@@ -115,7 +116,9 @@ int selinux_enabled = CONFIG_SECURITY_SELINUX_BOOTPARAM_VALUE;
115 116
116static int __init selinux_enabled_setup(char *str) 117static int __init selinux_enabled_setup(char *str)
117{ 118{
118 selinux_enabled = simple_strtol(str, NULL, 0); 119 unsigned long enabled;
120 if (!strict_strtoul(str, 0, &enabled))
121 selinux_enabled = enabled ? 1 : 0;
119 return 1; 122 return 1;
120} 123}
121__setup("selinux=", selinux_enabled_setup); 124__setup("selinux=", selinux_enabled_setup);
@@ -123,13 +126,11 @@ __setup("selinux=", selinux_enabled_setup);
123int selinux_enabled = 1; 126int selinux_enabled = 1;
124#endif 127#endif
125 128
126/* Original (dummy) security module. */
127static struct security_operations *original_ops;
128 129
129/* Minimal support for a secondary security module, 130/*
130 just to allow the use of the dummy or capability modules. 131 * Minimal support for a secondary security module,
131 The owlsm module can alternatively be used as a secondary 132 * just to allow the use of the capability module.
132 module as long as CONFIG_OWLSM_FD is not enabled. */ 133 */
133static struct security_operations *secondary_ops; 134static struct security_operations *secondary_ops;
134 135
135/* Lists of inode and superblock security structures initialized 136/* Lists of inode and superblock security structures initialized
@@ -554,13 +555,15 @@ static int selinux_set_mnt_opts(struct super_block *sb,
554 struct task_security_struct *tsec = current->security; 555 struct task_security_struct *tsec = current->security;
555 struct superblock_security_struct *sbsec = sb->s_security; 556 struct superblock_security_struct *sbsec = sb->s_security;
556 const char *name = sb->s_type->name; 557 const char *name = sb->s_type->name;
557 struct inode *inode = sbsec->sb->s_root->d_inode; 558 struct dentry *root = sb->s_root;
558 struct inode_security_struct *root_isec = inode->i_security; 559 struct inode *root_inode = root->d_inode;
560 struct inode_security_struct *root_isec = root_inode->i_security;
559 u32 fscontext_sid = 0, context_sid = 0, rootcontext_sid = 0; 561 u32 fscontext_sid = 0, context_sid = 0, rootcontext_sid = 0;
560 u32 defcontext_sid = 0; 562 u32 defcontext_sid = 0;
561 char **mount_options = opts->mnt_opts; 563 char **mount_options = opts->mnt_opts;
562 int *flags = opts->mnt_opts_flags; 564 int *flags = opts->mnt_opts_flags;
563 int num_opts = opts->num_mnt_opts; 565 int num_opts = opts->num_mnt_opts;
566 bool can_xattr = false;
564 567
565 mutex_lock(&sbsec->lock); 568 mutex_lock(&sbsec->lock);
566 569
@@ -594,7 +597,7 @@ static int selinux_set_mnt_opts(struct super_block *sb,
594 */ 597 */
595 if (sbsec->initialized && (sb->s_type->fs_flags & FS_BINARY_MOUNTDATA) 598 if (sbsec->initialized && (sb->s_type->fs_flags & FS_BINARY_MOUNTDATA)
596 && (num_opts == 0)) 599 && (num_opts == 0))
597 goto out; 600 goto out;
598 601
599 /* 602 /*
600 * parse the mount options, check if they are valid sids. 603 * parse the mount options, check if they are valid sids.
@@ -664,14 +667,24 @@ static int selinux_set_mnt_opts(struct super_block *sb,
664 goto out; 667 goto out;
665 } 668 }
666 669
667 if (strcmp(sb->s_type->name, "proc") == 0) 670 if (strcmp(name, "proc") == 0)
668 sbsec->proc = 1; 671 sbsec->proc = 1;
669 672
673 /*
674 * test if the fs supports xattrs, fs_use might make use of this if the
675 * fs has no definition in policy.
676 */
677 if (root_inode->i_op->getxattr) {
678 rc = root_inode->i_op->getxattr(root, XATTR_NAME_SELINUX, NULL, 0);
679 if (rc >= 0 || rc == -ENODATA)
680 can_xattr = true;
681 }
682
670 /* Determine the labeling behavior to use for this filesystem type. */ 683 /* Determine the labeling behavior to use for this filesystem type. */
671 rc = security_fs_use(sb->s_type->name, &sbsec->behavior, &sbsec->sid); 684 rc = security_fs_use(name, &sbsec->behavior, &sbsec->sid, can_xattr);
672 if (rc) { 685 if (rc) {
673 printk(KERN_WARNING "%s: security_fs_use(%s) returned %d\n", 686 printk(KERN_WARNING "%s: security_fs_use(%s) returned %d\n",
674 __func__, sb->s_type->name, rc); 687 __func__, name, rc);
675 goto out; 688 goto out;
676 } 689 }
677 690
@@ -956,6 +969,57 @@ out_err:
956 return rc; 969 return rc;
957} 970}
958 971
972void selinux_write_opts(struct seq_file *m, struct security_mnt_opts *opts)
973{
974 int i;
975 char *prefix;
976
977 for (i = 0; i < opts->num_mnt_opts; i++) {
978 char *has_comma = strchr(opts->mnt_opts[i], ',');
979
980 switch (opts->mnt_opts_flags[i]) {
981 case CONTEXT_MNT:
982 prefix = CONTEXT_STR;
983 break;
984 case FSCONTEXT_MNT:
985 prefix = FSCONTEXT_STR;
986 break;
987 case ROOTCONTEXT_MNT:
988 prefix = ROOTCONTEXT_STR;
989 break;
990 case DEFCONTEXT_MNT:
991 prefix = DEFCONTEXT_STR;
992 break;
993 default:
994 BUG();
995 };
996 /* we need a comma before each option */
997 seq_putc(m, ',');
998 seq_puts(m, prefix);
999 if (has_comma)
1000 seq_putc(m, '\"');
1001 seq_puts(m, opts->mnt_opts[i]);
1002 if (has_comma)
1003 seq_putc(m, '\"');
1004 }
1005}
1006
1007static int selinux_sb_show_options(struct seq_file *m, struct super_block *sb)
1008{
1009 struct security_mnt_opts opts;
1010 int rc;
1011
1012 rc = selinux_get_mnt_opts(sb, &opts);
1013 if (rc)
1014 return rc;
1015
1016 selinux_write_opts(m, &opts);
1017
1018 security_free_mnt_opts(&opts);
1019
1020 return rc;
1021}
1022
959static inline u16 inode_mode_to_security_class(umode_t mode) 1023static inline u16 inode_mode_to_security_class(umode_t mode)
960{ 1024{
961 switch (mode & S_IFMT) { 1025 switch (mode & S_IFMT) {
@@ -1682,14 +1746,23 @@ static inline u32 file_to_av(struct file *file)
1682 1746
1683/* Hook functions begin here. */ 1747/* Hook functions begin here. */
1684 1748
1685static int selinux_ptrace(struct task_struct *parent, struct task_struct *child) 1749static int selinux_ptrace(struct task_struct *parent,
1750 struct task_struct *child,
1751 unsigned int mode)
1686{ 1752{
1687 int rc; 1753 int rc;
1688 1754
1689 rc = secondary_ops->ptrace(parent, child); 1755 rc = secondary_ops->ptrace(parent, child, mode);
1690 if (rc) 1756 if (rc)
1691 return rc; 1757 return rc;
1692 1758
1759 if (mode == PTRACE_MODE_READ) {
1760 struct task_security_struct *tsec = parent->security;
1761 struct task_security_struct *csec = child->security;
1762 return avc_has_perm(tsec->sid, csec->sid,
1763 SECCLASS_FILE, FILE__READ, NULL);
1764 }
1765
1693 return task_has_perm(parent, child, PROCESS__PTRACE); 1766 return task_has_perm(parent, child, PROCESS__PTRACE);
1694} 1767}
1695 1768
@@ -2495,7 +2568,7 @@ static int selinux_inode_init_security(struct inode *inode, struct inode *dir,
2495 } 2568 }
2496 2569
2497 if (value && len) { 2570 if (value && len) {
2498 rc = security_sid_to_context(newsid, &context, &clen); 2571 rc = security_sid_to_context_force(newsid, &context, &clen);
2499 if (rc) { 2572 if (rc) {
2500 kfree(namep); 2573 kfree(namep);
2501 return rc; 2574 return rc;
@@ -2669,6 +2742,11 @@ static int selinux_inode_setxattr(struct dentry *dentry, const char *name,
2669 return rc; 2742 return rc;
2670 2743
2671 rc = security_context_to_sid(value, size, &newsid); 2744 rc = security_context_to_sid(value, size, &newsid);
2745 if (rc == -EINVAL) {
2746 if (!capable(CAP_MAC_ADMIN))
2747 return rc;
2748 rc = security_context_to_sid_force(value, size, &newsid);
2749 }
2672 if (rc) 2750 if (rc)
2673 return rc; 2751 return rc;
2674 2752
@@ -2690,7 +2768,7 @@ static int selinux_inode_setxattr(struct dentry *dentry, const char *name,
2690} 2768}
2691 2769
2692static void selinux_inode_post_setxattr(struct dentry *dentry, const char *name, 2770static void selinux_inode_post_setxattr(struct dentry *dentry, const char *name,
2693 const void *value, size_t size, 2771 const void *value, size_t size,
2694 int flags) 2772 int flags)
2695{ 2773{
2696 struct inode *inode = dentry->d_inode; 2774 struct inode *inode = dentry->d_inode;
@@ -2703,10 +2781,11 @@ static void selinux_inode_post_setxattr(struct dentry *dentry, const char *name,
2703 return; 2781 return;
2704 } 2782 }
2705 2783
2706 rc = security_context_to_sid(value, size, &newsid); 2784 rc = security_context_to_sid_force(value, size, &newsid);
2707 if (rc) { 2785 if (rc) {
2708 printk(KERN_WARNING "%s: unable to obtain SID for context " 2786 printk(KERN_ERR "SELinux: unable to map context to SID"
2709 "%s, rc=%d\n", __func__, (char *)value, -rc); 2787 "for (%s, %lu), rc=%d\n",
2788 inode->i_sb->s_id, inode->i_ino, -rc);
2710 return; 2789 return;
2711 } 2790 }
2712 2791
@@ -2735,9 +2814,7 @@ static int selinux_inode_removexattr(struct dentry *dentry, const char *name)
2735} 2814}
2736 2815
2737/* 2816/*
2738 * Copy the in-core inode security context value to the user. If the 2817 * Copy the inode security context value to the user.
2739 * getxattr() prior to this succeeded, check to see if we need to
2740 * canonicalize the value to be finally returned to the user.
2741 * 2818 *
2742 * Permission check is handled by selinux_inode_getxattr hook. 2819 * Permission check is handled by selinux_inode_getxattr hook.
2743 */ 2820 */
@@ -2746,12 +2823,33 @@ static int selinux_inode_getsecurity(const struct inode *inode, const char *name
2746 u32 size; 2823 u32 size;
2747 int error; 2824 int error;
2748 char *context = NULL; 2825 char *context = NULL;
2826 struct task_security_struct *tsec = current->security;
2749 struct inode_security_struct *isec = inode->i_security; 2827 struct inode_security_struct *isec = inode->i_security;
2750 2828
2751 if (strcmp(name, XATTR_SELINUX_SUFFIX)) 2829 if (strcmp(name, XATTR_SELINUX_SUFFIX))
2752 return -EOPNOTSUPP; 2830 return -EOPNOTSUPP;
2753 2831
2754 error = security_sid_to_context(isec->sid, &context, &size); 2832 /*
2833 * If the caller has CAP_MAC_ADMIN, then get the raw context
2834 * value even if it is not defined by current policy; otherwise,
2835 * use the in-core value under current policy.
2836 * Use the non-auditing forms of the permission checks since
2837 * getxattr may be called by unprivileged processes commonly
2838 * and lack of permission just means that we fall back to the
2839 * in-core context value, not a denial.
2840 */
2841 error = secondary_ops->capable(current, CAP_MAC_ADMIN);
2842 if (!error)
2843 error = avc_has_perm_noaudit(tsec->sid, tsec->sid,
2844 SECCLASS_CAPABILITY2,
2845 CAPABILITY2__MAC_ADMIN,
2846 0,
2847 NULL);
2848 if (!error)
2849 error = security_sid_to_context_force(isec->sid, &context,
2850 &size);
2851 else
2852 error = security_sid_to_context(isec->sid, &context, &size);
2755 if (error) 2853 if (error)
2756 return error; 2854 return error;
2757 error = size; 2855 error = size;
@@ -2865,46 +2963,16 @@ static void selinux_file_free_security(struct file *file)
2865static int selinux_file_ioctl(struct file *file, unsigned int cmd, 2963static int selinux_file_ioctl(struct file *file, unsigned int cmd,
2866 unsigned long arg) 2964 unsigned long arg)
2867{ 2965{
2868 int error = 0; 2966 u32 av = 0;
2869
2870 switch (cmd) {
2871 case FIONREAD:
2872 /* fall through */
2873 case FIBMAP:
2874 /* fall through */
2875 case FIGETBSZ:
2876 /* fall through */
2877 case EXT2_IOC_GETFLAGS:
2878 /* fall through */
2879 case EXT2_IOC_GETVERSION:
2880 error = file_has_perm(current, file, FILE__GETATTR);
2881 break;
2882
2883 case EXT2_IOC_SETFLAGS:
2884 /* fall through */
2885 case EXT2_IOC_SETVERSION:
2886 error = file_has_perm(current, file, FILE__SETATTR);
2887 break;
2888
2889 /* sys_ioctl() checks */
2890 case FIONBIO:
2891 /* fall through */
2892 case FIOASYNC:
2893 error = file_has_perm(current, file, 0);
2894 break;
2895 2967
2896 case KDSKBENT: 2968 if (_IOC_DIR(cmd) & _IOC_WRITE)
2897 case KDSKBSENT: 2969 av |= FILE__WRITE;
2898 error = task_has_capability(current, CAP_SYS_TTY_CONFIG); 2970 if (_IOC_DIR(cmd) & _IOC_READ)
2899 break; 2971 av |= FILE__READ;
2972 if (!av)
2973 av = FILE__IOCTL;
2900 2974
2901 /* default case assumes that the command will go 2975 return file_has_perm(current, file, av);
2902 * to the file's ioctl() function.
2903 */
2904 default:
2905 error = file_has_perm(current, file, FILE__IOCTL);
2906 }
2907 return error;
2908} 2976}
2909 2977
2910static int file_map_prot_check(struct file *file, unsigned long prot, int shared) 2978static int file_map_prot_check(struct file *file, unsigned long prot, int shared)
@@ -3663,7 +3731,7 @@ static int selinux_socket_bind(struct socket *sock, struct sockaddr *address, in
3663 struct sockaddr_in6 *addr6 = NULL; 3731 struct sockaddr_in6 *addr6 = NULL;
3664 unsigned short snum; 3732 unsigned short snum;
3665 struct sock *sk = sock->sk; 3733 struct sock *sk = sock->sk;
3666 u32 sid, node_perm, addrlen; 3734 u32 sid, node_perm;
3667 3735
3668 tsec = current->security; 3736 tsec = current->security;
3669 isec = SOCK_INODE(sock)->i_security; 3737 isec = SOCK_INODE(sock)->i_security;
@@ -3671,12 +3739,10 @@ static int selinux_socket_bind(struct socket *sock, struct sockaddr *address, in
3671 if (family == PF_INET) { 3739 if (family == PF_INET) {
3672 addr4 = (struct sockaddr_in *)address; 3740 addr4 = (struct sockaddr_in *)address;
3673 snum = ntohs(addr4->sin_port); 3741 snum = ntohs(addr4->sin_port);
3674 addrlen = sizeof(addr4->sin_addr.s_addr);
3675 addrp = (char *)&addr4->sin_addr.s_addr; 3742 addrp = (char *)&addr4->sin_addr.s_addr;
3676 } else { 3743 } else {
3677 addr6 = (struct sockaddr_in6 *)address; 3744 addr6 = (struct sockaddr_in6 *)address;
3678 snum = ntohs(addr6->sin6_port); 3745 snum = ntohs(addr6->sin6_port);
3679 addrlen = sizeof(addr6->sin6_addr.s6_addr);
3680 addrp = (char *)&addr6->sin6_addr.s6_addr; 3746 addrp = (char *)&addr6->sin6_addr.s6_addr;
3681 } 3747 }
3682 3748
@@ -5047,24 +5113,6 @@ static void selinux_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid)
5047 *secid = isec->sid; 5113 *secid = isec->sid;
5048} 5114}
5049 5115
5050/* module stacking operations */
5051static int selinux_register_security(const char *name, struct security_operations *ops)
5052{
5053 if (secondary_ops != original_ops) {
5054 printk(KERN_ERR "%s: There is already a secondary security "
5055 "module registered.\n", __func__);
5056 return -EINVAL;
5057 }
5058
5059 secondary_ops = ops;
5060
5061 printk(KERN_INFO "%s: Registering secondary module %s\n",
5062 __func__,
5063 name);
5064
5065 return 0;
5066}
5067
5068static void selinux_d_instantiate(struct dentry *dentry, struct inode *inode) 5116static void selinux_d_instantiate(struct dentry *dentry, struct inode *inode)
5069{ 5117{
5070 if (inode) 5118 if (inode)
@@ -5153,6 +5201,12 @@ static int selinux_setprocattr(struct task_struct *p,
5153 size--; 5201 size--;
5154 } 5202 }
5155 error = security_context_to_sid(value, size, &sid); 5203 error = security_context_to_sid(value, size, &sid);
5204 if (error == -EINVAL && !strcmp(name, "fscreate")) {
5205 if (!capable(CAP_MAC_ADMIN))
5206 return error;
5207 error = security_context_to_sid_force(value, size,
5208 &sid);
5209 }
5156 if (error) 5210 if (error)
5157 return error; 5211 return error;
5158 } 5212 }
@@ -5186,12 +5240,12 @@ static int selinux_setprocattr(struct task_struct *p,
5186 struct task_struct *g, *t; 5240 struct task_struct *g, *t;
5187 struct mm_struct *mm = p->mm; 5241 struct mm_struct *mm = p->mm;
5188 read_lock(&tasklist_lock); 5242 read_lock(&tasklist_lock);
5189 do_each_thread(g, t) 5243 do_each_thread(g, t) {
5190 if (t->mm == mm && t != p) { 5244 if (t->mm == mm && t != p) {
5191 read_unlock(&tasklist_lock); 5245 read_unlock(&tasklist_lock);
5192 return -EPERM; 5246 return -EPERM;
5193 } 5247 }
5194 while_each_thread(g, t); 5248 } while_each_thread(g, t);
5195 read_unlock(&tasklist_lock); 5249 read_unlock(&tasklist_lock);
5196 } 5250 }
5197 5251
@@ -5343,10 +5397,10 @@ static struct security_operations selinux_ops = {
5343 .sb_free_security = selinux_sb_free_security, 5397 .sb_free_security = selinux_sb_free_security,
5344 .sb_copy_data = selinux_sb_copy_data, 5398 .sb_copy_data = selinux_sb_copy_data,
5345 .sb_kern_mount = selinux_sb_kern_mount, 5399 .sb_kern_mount = selinux_sb_kern_mount,
5400 .sb_show_options = selinux_sb_show_options,
5346 .sb_statfs = selinux_sb_statfs, 5401 .sb_statfs = selinux_sb_statfs,
5347 .sb_mount = selinux_mount, 5402 .sb_mount = selinux_mount,
5348 .sb_umount = selinux_umount, 5403 .sb_umount = selinux_umount,
5349 .sb_get_mnt_opts = selinux_get_mnt_opts,
5350 .sb_set_mnt_opts = selinux_set_mnt_opts, 5404 .sb_set_mnt_opts = selinux_set_mnt_opts,
5351 .sb_clone_mnt_opts = selinux_sb_clone_mnt_opts, 5405 .sb_clone_mnt_opts = selinux_sb_clone_mnt_opts,
5352 .sb_parse_opts_str = selinux_parse_opts_str, 5406 .sb_parse_opts_str = selinux_parse_opts_str,
@@ -5378,7 +5432,7 @@ static struct security_operations selinux_ops = {
5378 .inode_listsecurity = selinux_inode_listsecurity, 5432 .inode_listsecurity = selinux_inode_listsecurity,
5379 .inode_need_killpriv = selinux_inode_need_killpriv, 5433 .inode_need_killpriv = selinux_inode_need_killpriv,
5380 .inode_killpriv = selinux_inode_killpriv, 5434 .inode_killpriv = selinux_inode_killpriv,
5381 .inode_getsecid = selinux_inode_getsecid, 5435 .inode_getsecid = selinux_inode_getsecid,
5382 5436
5383 .file_permission = selinux_file_permission, 5437 .file_permission = selinux_file_permission,
5384 .file_alloc_security = selinux_file_alloc_security, 5438 .file_alloc_security = selinux_file_alloc_security,
@@ -5419,7 +5473,7 @@ static struct security_operations selinux_ops = {
5419 .task_to_inode = selinux_task_to_inode, 5473 .task_to_inode = selinux_task_to_inode,
5420 5474
5421 .ipc_permission = selinux_ipc_permission, 5475 .ipc_permission = selinux_ipc_permission,
5422 .ipc_getsecid = selinux_ipc_getsecid, 5476 .ipc_getsecid = selinux_ipc_getsecid,
5423 5477
5424 .msg_msg_alloc_security = selinux_msg_msg_alloc_security, 5478 .msg_msg_alloc_security = selinux_msg_msg_alloc_security,
5425 .msg_msg_free_security = selinux_msg_msg_free_security, 5479 .msg_msg_free_security = selinux_msg_msg_free_security,
@@ -5443,8 +5497,6 @@ static struct security_operations selinux_ops = {
5443 .sem_semctl = selinux_sem_semctl, 5497 .sem_semctl = selinux_sem_semctl,
5444 .sem_semop = selinux_sem_semop, 5498 .sem_semop = selinux_sem_semop,
5445 5499
5446 .register_security = selinux_register_security,
5447
5448 .d_instantiate = selinux_d_instantiate, 5500 .d_instantiate = selinux_d_instantiate,
5449 5501
5450 .getprocattr = selinux_getprocattr, 5502 .getprocattr = selinux_getprocattr,
@@ -5538,7 +5590,7 @@ static __init int selinux_init(void)
5538 0, SLAB_PANIC, NULL); 5590 0, SLAB_PANIC, NULL);
5539 avc_init(); 5591 avc_init();
5540 5592
5541 original_ops = secondary_ops = security_ops; 5593 secondary_ops = security_ops;
5542 if (!secondary_ops) 5594 if (!secondary_ops)
5543 panic("SELinux: No initial security operations\n"); 5595 panic("SELinux: No initial security operations\n");
5544 if (register_security(&selinux_ops)) 5596 if (register_security(&selinux_ops))
diff --git a/security/selinux/include/audit.h b/security/selinux/include/audit.h
index 6c8b9ef15579..1bdf973433cc 100644
--- a/security/selinux/include/audit.h
+++ b/security/selinux/include/audit.h
@@ -1,7 +1,7 @@
1/* 1/*
2 * SELinux support for the Audit LSM hooks 2 * SELinux support for the Audit LSM hooks
3 * 3 *
4 * Most of below header was moved from include/linux/selinux.h which 4 * Most of below header was moved from include/linux/selinux.h which
5 * is released under below copyrights: 5 * is released under below copyrights:
6 * 6 *
7 * Author: James Morris <jmorris@redhat.com> 7 * Author: James Morris <jmorris@redhat.com>
@@ -52,7 +52,7 @@ void selinux_audit_rule_free(void *rule);
52 * -errno on failure. 52 * -errno on failure.
53 */ 53 */
54int selinux_audit_rule_match(u32 sid, u32 field, u32 op, void *rule, 54int selinux_audit_rule_match(u32 sid, u32 field, u32 op, void *rule,
55 struct audit_context *actx); 55 struct audit_context *actx);
56 56
57/** 57/**
58 * selinux_audit_rule_known - check to see if rule contains selinux fields. 58 * selinux_audit_rule_known - check to see if rule contains selinux fields.
diff --git a/security/selinux/include/avc.h b/security/selinux/include/avc.h
index 8e23d7a873a4..7b9769f5e775 100644
--- a/security/selinux/include/avc.h
+++ b/security/selinux/include/avc.h
@@ -75,13 +75,12 @@ struct avc_audit_data {
75 75
76/* Initialize an AVC audit data structure. */ 76/* Initialize an AVC audit data structure. */
77#define AVC_AUDIT_DATA_INIT(_d,_t) \ 77#define AVC_AUDIT_DATA_INIT(_d,_t) \
78 { memset((_d), 0, sizeof(struct avc_audit_data)); (_d)->type = AVC_AUDIT_DATA_##_t; } 78 { memset((_d), 0, sizeof(struct avc_audit_data)); (_d)->type = AVC_AUDIT_DATA_##_t; }
79 79
80/* 80/*
81 * AVC statistics 81 * AVC statistics
82 */ 82 */
83struct avc_cache_stats 83struct avc_cache_stats {
84{
85 unsigned int lookups; 84 unsigned int lookups;
86 unsigned int hits; 85 unsigned int hits;
87 unsigned int misses; 86 unsigned int misses;
@@ -97,8 +96,8 @@ struct avc_cache_stats
97void __init avc_init(void); 96void __init avc_init(void);
98 97
99void avc_audit(u32 ssid, u32 tsid, 98void avc_audit(u32 ssid, u32 tsid,
100 u16 tclass, u32 requested, 99 u16 tclass, u32 requested,
101 struct av_decision *avd, int result, struct avc_audit_data *auditdata); 100 struct av_decision *avd, int result, struct avc_audit_data *auditdata);
102 101
103#define AVC_STRICT 1 /* Ignore permissive mode. */ 102#define AVC_STRICT 1 /* Ignore permissive mode. */
104int avc_has_perm_noaudit(u32 ssid, u32 tsid, 103int avc_has_perm_noaudit(u32 ssid, u32 tsid,
@@ -107,8 +106,8 @@ int avc_has_perm_noaudit(u32 ssid, u32 tsid,
107 struct av_decision *avd); 106 struct av_decision *avd);
108 107
109int avc_has_perm(u32 ssid, u32 tsid, 108int avc_has_perm(u32 ssid, u32 tsid,
110 u16 tclass, u32 requested, 109 u16 tclass, u32 requested,
111 struct avc_audit_data *auditdata); 110 struct avc_audit_data *auditdata);
112 111
113u32 avc_policy_seqno(void); 112u32 avc_policy_seqno(void);
114 113
@@ -122,7 +121,7 @@ u32 avc_policy_seqno(void);
122#define AVC_CALLBACK_AUDITDENY_DISABLE 128 121#define AVC_CALLBACK_AUDITDENY_DISABLE 128
123 122
124int avc_add_callback(int (*callback)(u32 event, u32 ssid, u32 tsid, 123int avc_add_callback(int (*callback)(u32 event, u32 ssid, u32 tsid,
125 u16 tclass, u32 perms, 124 u16 tclass, u32 perms,
126 u32 *out_retained), 125 u32 *out_retained),
127 u32 events, u32 ssid, u32 tsid, 126 u32 events, u32 ssid, u32 tsid,
128 u16 tclass, u32 perms); 127 u16 tclass, u32 perms);
diff --git a/security/selinux/include/objsec.h b/security/selinux/include/objsec.h
index 032c2357dad1..91070ab874ce 100644
--- a/security/selinux/include/objsec.h
+++ b/security/selinux/include/objsec.h
@@ -44,7 +44,6 @@ struct inode_security_struct {
44 u16 sclass; /* security class of this object */ 44 u16 sclass; /* security class of this object */
45 unsigned char initialized; /* initialization flag */ 45 unsigned char initialized; /* initialization flag */
46 struct mutex lock; 46 struct mutex lock;
47 unsigned char inherit; /* inherit SID from parent entry */
48}; 47};
49 48
50struct file_security_struct { 49struct file_security_struct {
diff --git a/security/selinux/include/security.h b/security/selinux/include/security.h
index ad30ac4273d6..44cba2e21dcf 100644
--- a/security/selinux/include/security.h
+++ b/security/selinux/include/security.h
@@ -93,12 +93,17 @@ int security_change_sid(u32 ssid, u32 tsid,
93int security_sid_to_context(u32 sid, char **scontext, 93int security_sid_to_context(u32 sid, char **scontext,
94 u32 *scontext_len); 94 u32 *scontext_len);
95 95
96int security_sid_to_context_force(u32 sid, char **scontext, u32 *scontext_len);
97
96int security_context_to_sid(const char *scontext, u32 scontext_len, 98int security_context_to_sid(const char *scontext, u32 scontext_len,
97 u32 *out_sid); 99 u32 *out_sid);
98 100
99int security_context_to_sid_default(const char *scontext, u32 scontext_len, 101int security_context_to_sid_default(const char *scontext, u32 scontext_len,
100 u32 *out_sid, u32 def_sid, gfp_t gfp_flags); 102 u32 *out_sid, u32 def_sid, gfp_t gfp_flags);
101 103
104int security_context_to_sid_force(const char *scontext, u32 scontext_len,
105 u32 *sid);
106
102int security_get_user_sids(u32 callsid, char *username, 107int security_get_user_sids(u32 callsid, char *username,
103 u32 **sids, u32 *nel); 108 u32 **sids, u32 *nel);
104 109
@@ -131,7 +136,7 @@ int security_get_allow_unknown(void);
131#define SECURITY_FS_USE_MNTPOINT 6 /* use mountpoint labeling */ 136#define SECURITY_FS_USE_MNTPOINT 6 /* use mountpoint labeling */
132 137
133int security_fs_use(const char *fstype, unsigned int *behavior, 138int security_fs_use(const char *fstype, unsigned int *behavior,
134 u32 *sid); 139 u32 *sid, bool can_xattr);
135 140
136int security_genfs_sid(const char *fstype, char *name, u16 sclass, 141int security_genfs_sid(const char *fstype, char *name, u16 sclass,
137 u32 *sid); 142 u32 *sid);
diff --git a/security/selinux/netnode.c b/security/selinux/netnode.c
index b6ccd09379f1..7100072bb1b0 100644
--- a/security/selinux/netnode.c
+++ b/security/selinux/netnode.c
@@ -38,7 +38,6 @@
38#include <linux/ipv6.h> 38#include <linux/ipv6.h>
39#include <net/ip.h> 39#include <net/ip.h>
40#include <net/ipv6.h> 40#include <net/ipv6.h>
41#include <asm/bug.h>
42 41
43#include "netnode.h" 42#include "netnode.h"
44#include "objsec.h" 43#include "objsec.h"
diff --git a/security/selinux/netport.c b/security/selinux/netport.c
index 90b4cff7c350..fe7fba67f19f 100644
--- a/security/selinux/netport.c
+++ b/security/selinux/netport.c
@@ -37,7 +37,6 @@
37#include <linux/ipv6.h> 37#include <linux/ipv6.h>
38#include <net/ip.h> 38#include <net/ip.h>
39#include <net/ipv6.h> 39#include <net/ipv6.h>
40#include <asm/bug.h>
41 40
42#include "netport.h" 41#include "netport.h"
43#include "objsec.h" 42#include "objsec.h"
@@ -272,7 +271,7 @@ static __init int sel_netport_init(void)
272 } 271 }
273 272
274 ret = avc_add_callback(sel_netport_avc_callback, AVC_CALLBACK_RESET, 273 ret = avc_add_callback(sel_netport_avc_callback, AVC_CALLBACK_RESET,
275 SECSID_NULL, SECSID_NULL, SECCLASS_NULL, 0); 274 SECSID_NULL, SECSID_NULL, SECCLASS_NULL, 0);
276 if (ret != 0) 275 if (ret != 0)
277 panic("avc_add_callback() failed, error %d\n", ret); 276 panic("avc_add_callback() failed, error %d\n", ret);
278 277
diff --git a/security/selinux/selinuxfs.c b/security/selinux/selinuxfs.c
index ac1ccc13a704..69c9dccc8cf0 100644
--- a/security/selinux/selinuxfs.c
+++ b/security/selinux/selinuxfs.c
@@ -27,7 +27,7 @@
27#include <linux/seq_file.h> 27#include <linux/seq_file.h>
28#include <linux/percpu.h> 28#include <linux/percpu.h>
29#include <linux/audit.h> 29#include <linux/audit.h>
30#include <asm/uaccess.h> 30#include <linux/uaccess.h>
31 31
32/* selinuxfs pseudo filesystem for exporting the security policy API. 32/* selinuxfs pseudo filesystem for exporting the security policy API.
33 Based on the proc code and the fs/nfsd/nfsctl.c code. */ 33 Based on the proc code and the fs/nfsd/nfsctl.c code. */
@@ -57,14 +57,18 @@ int selinux_compat_net = SELINUX_COMPAT_NET_VALUE;
57 57
58static int __init checkreqprot_setup(char *str) 58static int __init checkreqprot_setup(char *str)
59{ 59{
60 selinux_checkreqprot = simple_strtoul(str, NULL, 0) ? 1 : 0; 60 unsigned long checkreqprot;
61 if (!strict_strtoul(str, 0, &checkreqprot))
62 selinux_checkreqprot = checkreqprot ? 1 : 0;
61 return 1; 63 return 1;
62} 64}
63__setup("checkreqprot=", checkreqprot_setup); 65__setup("checkreqprot=", checkreqprot_setup);
64 66
65static int __init selinux_compat_net_setup(char *str) 67static int __init selinux_compat_net_setup(char *str)
66{ 68{
67 selinux_compat_net = simple_strtoul(str, NULL, 0) ? 1 : 0; 69 unsigned long compat_net;
70 if (!strict_strtoul(str, 0, &compat_net))
71 selinux_compat_net = compat_net ? 1 : 0;
68 return 1; 72 return 1;
69} 73}
70__setup("selinux_compat_net=", selinux_compat_net_setup); 74__setup("selinux_compat_net=", selinux_compat_net_setup);
@@ -352,11 +356,6 @@ static ssize_t sel_write_load(struct file *file, const char __user *buf,
352 length = count; 356 length = count;
353 357
354out1: 358out1:
355
356 printk(KERN_INFO "SELinux: policy loaded with handle_unknown=%s\n",
357 (security_get_reject_unknown() ? "reject" :
358 (security_get_allow_unknown() ? "allow" : "deny")));
359
360 audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_POLICY_LOAD, 359 audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_POLICY_LOAD,
361 "policy loaded auid=%u ses=%u", 360 "policy loaded auid=%u ses=%u",
362 audit_get_loginuid(current), 361 audit_get_loginuid(current),
diff --git a/security/selinux/ss/avtab.c b/security/selinux/ss/avtab.c
index 9e6626362bfd..a1be97f8beea 100644
--- a/security/selinux/ss/avtab.c
+++ b/security/selinux/ss/avtab.c
@@ -311,7 +311,7 @@ void avtab_hash_eval(struct avtab *h, char *tag)
311 } 311 }
312 312
313 printk(KERN_DEBUG "SELinux: %s: %d entries and %d/%d buckets used, " 313 printk(KERN_DEBUG "SELinux: %s: %d entries and %d/%d buckets used, "
314 "longest chain length %d sum of chain length^2 %Lu\n", 314 "longest chain length %d sum of chain length^2 %llu\n",
315 tag, h->nel, slots_used, h->nslot, max_chain_len, 315 tag, h->nel, slots_used, h->nslot, max_chain_len,
316 chain2_len_sum); 316 chain2_len_sum);
317} 317}
diff --git a/security/selinux/ss/context.h b/security/selinux/ss/context.h
index b9a6f7fc62fc..658c2bd17da8 100644
--- a/security/selinux/ss/context.h
+++ b/security/selinux/ss/context.h
@@ -28,6 +28,8 @@ struct context {
28 u32 role; 28 u32 role;
29 u32 type; 29 u32 type;
30 struct mls_range range; 30 struct mls_range range;
31 char *str; /* string representation if context cannot be mapped. */
32 u32 len; /* length of string in bytes */
31}; 33};
32 34
33static inline void mls_context_init(struct context *c) 35static inline void mls_context_init(struct context *c)
@@ -106,20 +108,43 @@ static inline void context_init(struct context *c)
106 108
107static inline int context_cpy(struct context *dst, struct context *src) 109static inline int context_cpy(struct context *dst, struct context *src)
108{ 110{
111 int rc;
112
109 dst->user = src->user; 113 dst->user = src->user;
110 dst->role = src->role; 114 dst->role = src->role;
111 dst->type = src->type; 115 dst->type = src->type;
112 return mls_context_cpy(dst, src); 116 if (src->str) {
117 dst->str = kstrdup(src->str, GFP_ATOMIC);
118 if (!dst->str)
119 return -ENOMEM;
120 dst->len = src->len;
121 } else {
122 dst->str = NULL;
123 dst->len = 0;
124 }
125 rc = mls_context_cpy(dst, src);
126 if (rc) {
127 kfree(dst->str);
128 return rc;
129 }
130 return 0;
113} 131}
114 132
115static inline void context_destroy(struct context *c) 133static inline void context_destroy(struct context *c)
116{ 134{
117 c->user = c->role = c->type = 0; 135 c->user = c->role = c->type = 0;
136 kfree(c->str);
137 c->str = NULL;
138 c->len = 0;
118 mls_context_destroy(c); 139 mls_context_destroy(c);
119} 140}
120 141
121static inline int context_cmp(struct context *c1, struct context *c2) 142static inline int context_cmp(struct context *c1, struct context *c2)
122{ 143{
144 if (c1->len && c2->len)
145 return (c1->len == c2->len && !strcmp(c1->str, c2->str));
146 if (c1->len || c2->len)
147 return 0;
123 return ((c1->user == c2->user) && 148 return ((c1->user == c2->user) &&
124 (c1->role == c2->role) && 149 (c1->role == c2->role) &&
125 (c1->type == c2->type) && 150 (c1->type == c2->type) &&
diff --git a/security/selinux/ss/mls.c b/security/selinux/ss/mls.c
index 8b1706b7b3cc..77d745da48bb 100644
--- a/security/selinux/ss/mls.c
+++ b/security/selinux/ss/mls.c
@@ -239,7 +239,8 @@ int mls_context_isvalid(struct policydb *p, struct context *c)
239 * Policy read-lock must be held for sidtab lookup. 239 * Policy read-lock must be held for sidtab lookup.
240 * 240 *
241 */ 241 */
242int mls_context_to_sid(char oldc, 242int mls_context_to_sid(struct policydb *pol,
243 char oldc,
243 char **scontext, 244 char **scontext,
244 struct context *context, 245 struct context *context,
245 struct sidtab *s, 246 struct sidtab *s,
@@ -286,7 +287,7 @@ int mls_context_to_sid(char oldc,
286 *p++ = 0; 287 *p++ = 0;
287 288
288 for (l = 0; l < 2; l++) { 289 for (l = 0; l < 2; l++) {
289 levdatum = hashtab_search(policydb.p_levels.table, scontextp); 290 levdatum = hashtab_search(pol->p_levels.table, scontextp);
290 if (!levdatum) { 291 if (!levdatum) {
291 rc = -EINVAL; 292 rc = -EINVAL;
292 goto out; 293 goto out;
@@ -311,7 +312,7 @@ int mls_context_to_sid(char oldc,
311 *rngptr++ = 0; 312 *rngptr++ = 0;
312 } 313 }
313 314
314 catdatum = hashtab_search(policydb.p_cats.table, 315 catdatum = hashtab_search(pol->p_cats.table,
315 scontextp); 316 scontextp);
316 if (!catdatum) { 317 if (!catdatum) {
317 rc = -EINVAL; 318 rc = -EINVAL;
@@ -327,7 +328,7 @@ int mls_context_to_sid(char oldc,
327 if (rngptr) { 328 if (rngptr) {
328 int i; 329 int i;
329 330
330 rngdatum = hashtab_search(policydb.p_cats.table, rngptr); 331 rngdatum = hashtab_search(pol->p_cats.table, rngptr);
331 if (!rngdatum) { 332 if (!rngdatum) {
332 rc = -EINVAL; 333 rc = -EINVAL;
333 goto out; 334 goto out;
@@ -395,7 +396,7 @@ int mls_from_string(char *str, struct context *context, gfp_t gfp_mask)
395 if (!tmpstr) { 396 if (!tmpstr) {
396 rc = -ENOMEM; 397 rc = -ENOMEM;
397 } else { 398 } else {
398 rc = mls_context_to_sid(':', &tmpstr, context, 399 rc = mls_context_to_sid(&policydb, ':', &tmpstr, context,
399 NULL, SECSID_NULL); 400 NULL, SECSID_NULL);
400 kfree(freestr); 401 kfree(freestr);
401 } 402 }
@@ -436,13 +437,13 @@ int mls_setup_user_range(struct context *fromcon, struct user_datum *user,
436 struct mls_level *usercon_clr = &(usercon->range.level[1]); 437 struct mls_level *usercon_clr = &(usercon->range.level[1]);
437 438
438 /* Honor the user's default level if we can */ 439 /* Honor the user's default level if we can */
439 if (mls_level_between(user_def, fromcon_sen, fromcon_clr)) { 440 if (mls_level_between(user_def, fromcon_sen, fromcon_clr))
440 *usercon_sen = *user_def; 441 *usercon_sen = *user_def;
441 } else if (mls_level_between(fromcon_sen, user_def, user_clr)) { 442 else if (mls_level_between(fromcon_sen, user_def, user_clr))
442 *usercon_sen = *fromcon_sen; 443 *usercon_sen = *fromcon_sen;
443 } else if (mls_level_between(fromcon_clr, user_low, user_def)) { 444 else if (mls_level_between(fromcon_clr, user_low, user_def))
444 *usercon_sen = *user_low; 445 *usercon_sen = *user_low;
445 } else 446 else
446 return -EINVAL; 447 return -EINVAL;
447 448
448 /* Lower the clearance of available contexts 449 /* Lower the clearance of available contexts
diff --git a/security/selinux/ss/mls.h b/security/selinux/ss/mls.h
index 0fdf6257ef64..1276715aaa8b 100644
--- a/security/selinux/ss/mls.h
+++ b/security/selinux/ss/mls.h
@@ -30,7 +30,8 @@ int mls_context_isvalid(struct policydb *p, struct context *c);
30int mls_range_isvalid(struct policydb *p, struct mls_range *r); 30int mls_range_isvalid(struct policydb *p, struct mls_range *r);
31int mls_level_isvalid(struct policydb *p, struct mls_level *l); 31int mls_level_isvalid(struct policydb *p, struct mls_level *l);
32 32
33int mls_context_to_sid(char oldc, 33int mls_context_to_sid(struct policydb *p,
34 char oldc,
34 char **scontext, 35 char **scontext,
35 struct context *context, 36 struct context *context,
36 struct sidtab *s, 37 struct sidtab *s,
diff --git a/security/selinux/ss/policydb.c b/security/selinux/ss/policydb.c
index 84f8cc73c7db..2391761ae422 100644
--- a/security/selinux/ss/policydb.c
+++ b/security/selinux/ss/policydb.c
@@ -1478,7 +1478,8 @@ int policydb_read(struct policydb *p, void *fp)
1478 struct ocontext *l, *c, *newc; 1478 struct ocontext *l, *c, *newc;
1479 struct genfs *genfs_p, *genfs, *newgenfs; 1479 struct genfs *genfs_p, *genfs, *newgenfs;
1480 int i, j, rc; 1480 int i, j, rc;
1481 __le32 buf[8]; 1481 __le32 buf[4];
1482 u32 nodebuf[8];
1482 u32 len, len2, config, nprim, nel, nel2; 1483 u32 len, len2, config, nprim, nel, nel2;
1483 char *policydb_str; 1484 char *policydb_str;
1484 struct policydb_compat_info *info; 1485 struct policydb_compat_info *info;
@@ -1749,11 +1750,11 @@ int policydb_read(struct policydb *p, void *fp)
1749 goto bad; 1750 goto bad;
1750 break; 1751 break;
1751 case OCON_NODE: 1752 case OCON_NODE:
1752 rc = next_entry(buf, fp, sizeof(u32) * 2); 1753 rc = next_entry(nodebuf, fp, sizeof(u32) * 2);
1753 if (rc < 0) 1754 if (rc < 0)
1754 goto bad; 1755 goto bad;
1755 c->u.node.addr = le32_to_cpu(buf[0]); 1756 c->u.node.addr = nodebuf[0]; /* network order */
1756 c->u.node.mask = le32_to_cpu(buf[1]); 1757 c->u.node.mask = nodebuf[1]; /* network order */
1757 rc = context_read_and_validate(&c->context[0], p, fp); 1758 rc = context_read_and_validate(&c->context[0], p, fp);
1758 if (rc) 1759 if (rc)
1759 goto bad; 1760 goto bad;
@@ -1782,13 +1783,13 @@ int policydb_read(struct policydb *p, void *fp)
1782 case OCON_NODE6: { 1783 case OCON_NODE6: {
1783 int k; 1784 int k;
1784 1785
1785 rc = next_entry(buf, fp, sizeof(u32) * 8); 1786 rc = next_entry(nodebuf, fp, sizeof(u32) * 8);
1786 if (rc < 0) 1787 if (rc < 0)
1787 goto bad; 1788 goto bad;
1788 for (k = 0; k < 4; k++) 1789 for (k = 0; k < 4; k++)
1789 c->u.node6.addr[k] = le32_to_cpu(buf[k]); 1790 c->u.node6.addr[k] = nodebuf[k];
1790 for (k = 0; k < 4; k++) 1791 for (k = 0; k < 4; k++)
1791 c->u.node6.mask[k] = le32_to_cpu(buf[k+4]); 1792 c->u.node6.mask[k] = nodebuf[k+4];
1792 if (context_read_and_validate(&c->context[0], p, fp)) 1793 if (context_read_and_validate(&c->context[0], p, fp))
1793 goto bad; 1794 goto bad;
1794 break; 1795 break;
diff --git a/security/selinux/ss/services.c b/security/selinux/ss/services.c
index dcc2e1c4fd83..8e42da120101 100644
--- a/security/selinux/ss/services.c
+++ b/security/selinux/ss/services.c
@@ -71,14 +71,6 @@ int selinux_policycap_openperm;
71extern const struct selinux_class_perm selinux_class_perm; 71extern const struct selinux_class_perm selinux_class_perm;
72 72
73static DEFINE_RWLOCK(policy_rwlock); 73static DEFINE_RWLOCK(policy_rwlock);
74#define POLICY_RDLOCK read_lock(&policy_rwlock)
75#define POLICY_WRLOCK write_lock_irq(&policy_rwlock)
76#define POLICY_RDUNLOCK read_unlock(&policy_rwlock)
77#define POLICY_WRUNLOCK write_unlock_irq(&policy_rwlock)
78
79static DEFINE_MUTEX(load_mutex);
80#define LOAD_LOCK mutex_lock(&load_mutex)
81#define LOAD_UNLOCK mutex_unlock(&load_mutex)
82 74
83static struct sidtab sidtab; 75static struct sidtab sidtab;
84struct policydb policydb; 76struct policydb policydb;
@@ -332,7 +324,7 @@ static int context_struct_compute_av(struct context *scontext,
332 goto inval_class; 324 goto inval_class;
333 if (unlikely(tclass > policydb.p_classes.nprim)) 325 if (unlikely(tclass > policydb.p_classes.nprim))
334 if (tclass > kdefs->cts_len || 326 if (tclass > kdefs->cts_len ||
335 !kdefs->class_to_string[tclass - 1] || 327 !kdefs->class_to_string[tclass] ||
336 !policydb.allow_unknown) 328 !policydb.allow_unknown)
337 goto inval_class; 329 goto inval_class;
338 330
@@ -415,9 +407,19 @@ static int context_struct_compute_av(struct context *scontext,
415 return 0; 407 return 0;
416 408
417inval_class: 409inval_class:
418 printk(KERN_ERR "SELinux: %s: unrecognized class %d\n", __func__, 410 if (!tclass || tclass > kdefs->cts_len ||
419 tclass); 411 !kdefs->class_to_string[tclass]) {
420 return -EINVAL; 412 if (printk_ratelimit())
413 printk(KERN_ERR "SELinux: %s: unrecognized class %d\n",
414 __func__, tclass);
415 return -EINVAL;
416 }
417
418 /*
419 * Known to the kernel, but not to the policy.
420 * Handle as a denial (allowed is 0).
421 */
422 return 0;
421} 423}
422 424
423/* 425/*
@@ -429,7 +431,7 @@ int security_permissive_sid(u32 sid)
429 u32 type; 431 u32 type;
430 int rc; 432 int rc;
431 433
432 POLICY_RDLOCK; 434 read_lock(&policy_rwlock);
433 435
434 context = sidtab_search(&sidtab, sid); 436 context = sidtab_search(&sidtab, sid);
435 BUG_ON(!context); 437 BUG_ON(!context);
@@ -441,7 +443,7 @@ int security_permissive_sid(u32 sid)
441 */ 443 */
442 rc = ebitmap_get_bit(&policydb.permissive_map, type); 444 rc = ebitmap_get_bit(&policydb.permissive_map, type);
443 445
444 POLICY_RDUNLOCK; 446 read_unlock(&policy_rwlock);
445 return rc; 447 return rc;
446} 448}
447 449
@@ -486,7 +488,7 @@ int security_validate_transition(u32 oldsid, u32 newsid, u32 tasksid,
486 if (!ss_initialized) 488 if (!ss_initialized)
487 return 0; 489 return 0;
488 490
489 POLICY_RDLOCK; 491 read_lock(&policy_rwlock);
490 492
491 /* 493 /*
492 * Remap extended Netlink classes for old policy versions. 494 * Remap extended Netlink classes for old policy versions.
@@ -543,7 +545,7 @@ int security_validate_transition(u32 oldsid, u32 newsid, u32 tasksid,
543 } 545 }
544 546
545out: 547out:
546 POLICY_RDUNLOCK; 548 read_unlock(&policy_rwlock);
547 return rc; 549 return rc;
548} 550}
549 551
@@ -578,7 +580,7 @@ int security_compute_av(u32 ssid,
578 return 0; 580 return 0;
579 } 581 }
580 582
581 POLICY_RDLOCK; 583 read_lock(&policy_rwlock);
582 584
583 scontext = sidtab_search(&sidtab, ssid); 585 scontext = sidtab_search(&sidtab, ssid);
584 if (!scontext) { 586 if (!scontext) {
@@ -598,7 +600,7 @@ int security_compute_av(u32 ssid,
598 rc = context_struct_compute_av(scontext, tcontext, tclass, 600 rc = context_struct_compute_av(scontext, tcontext, tclass,
599 requested, avd); 601 requested, avd);
600out: 602out:
601 POLICY_RDUNLOCK; 603 read_unlock(&policy_rwlock);
602 return rc; 604 return rc;
603} 605}
604 606
@@ -616,6 +618,14 @@ static int context_struct_to_string(struct context *context, char **scontext, u3
616 *scontext = NULL; 618 *scontext = NULL;
617 *scontext_len = 0; 619 *scontext_len = 0;
618 620
621 if (context->len) {
622 *scontext_len = context->len;
623 *scontext = kstrdup(context->str, GFP_ATOMIC);
624 if (!(*scontext))
625 return -ENOMEM;
626 return 0;
627 }
628
619 /* Compute the size of the context. */ 629 /* Compute the size of the context. */
620 *scontext_len += strlen(policydb.p_user_val_to_name[context->user - 1]) + 1; 630 *scontext_len += strlen(policydb.p_user_val_to_name[context->user - 1]) + 1;
621 *scontext_len += strlen(policydb.p_role_val_to_name[context->role - 1]) + 1; 631 *scontext_len += strlen(policydb.p_role_val_to_name[context->role - 1]) + 1;
@@ -655,17 +665,8 @@ const char *security_get_initial_sid_context(u32 sid)
655 return initial_sid_to_string[sid]; 665 return initial_sid_to_string[sid];
656} 666}
657 667
658/** 668static int security_sid_to_context_core(u32 sid, char **scontext,
659 * security_sid_to_context - Obtain a context for a given SID. 669 u32 *scontext_len, int force)
660 * @sid: security identifier, SID
661 * @scontext: security context
662 * @scontext_len: length in bytes
663 *
664 * Write the string representation of the context associated with @sid
665 * into a dynamically allocated string of the correct size. Set @scontext
666 * to point to this string and set @scontext_len to the length of the string.
667 */
668int security_sid_to_context(u32 sid, char **scontext, u32 *scontext_len)
669{ 670{
670 struct context *context; 671 struct context *context;
671 int rc = 0; 672 int rc = 0;
@@ -692,8 +693,11 @@ int security_sid_to_context(u32 sid, char **scontext, u32 *scontext_len)
692 rc = -EINVAL; 693 rc = -EINVAL;
693 goto out; 694 goto out;
694 } 695 }
695 POLICY_RDLOCK; 696 read_lock(&policy_rwlock);
696 context = sidtab_search(&sidtab, sid); 697 if (force)
698 context = sidtab_search_force(&sidtab, sid);
699 else
700 context = sidtab_search(&sidtab, sid);
697 if (!context) { 701 if (!context) {
698 printk(KERN_ERR "SELinux: %s: unrecognized SID %d\n", 702 printk(KERN_ERR "SELinux: %s: unrecognized SID %d\n",
699 __func__, sid); 703 __func__, sid);
@@ -702,59 +706,54 @@ int security_sid_to_context(u32 sid, char **scontext, u32 *scontext_len)
702 } 706 }
703 rc = context_struct_to_string(context, scontext, scontext_len); 707 rc = context_struct_to_string(context, scontext, scontext_len);
704out_unlock: 708out_unlock:
705 POLICY_RDUNLOCK; 709 read_unlock(&policy_rwlock);
706out: 710out:
707 return rc; 711 return rc;
708 712
709} 713}
710 714
711static int security_context_to_sid_core(const char *scontext, u32 scontext_len, 715/**
712 u32 *sid, u32 def_sid, gfp_t gfp_flags) 716 * security_sid_to_context - Obtain a context for a given SID.
717 * @sid: security identifier, SID
718 * @scontext: security context
719 * @scontext_len: length in bytes
720 *
721 * Write the string representation of the context associated with @sid
722 * into a dynamically allocated string of the correct size. Set @scontext
723 * to point to this string and set @scontext_len to the length of the string.
724 */
725int security_sid_to_context(u32 sid, char **scontext, u32 *scontext_len)
726{
727 return security_sid_to_context_core(sid, scontext, scontext_len, 0);
728}
729
730int security_sid_to_context_force(u32 sid, char **scontext, u32 *scontext_len)
731{
732 return security_sid_to_context_core(sid, scontext, scontext_len, 1);
733}
734
735/*
736 * Caveat: Mutates scontext.
737 */
738static int string_to_context_struct(struct policydb *pol,
739 struct sidtab *sidtabp,
740 char *scontext,
741 u32 scontext_len,
742 struct context *ctx,
743 u32 def_sid)
713{ 744{
714 char *scontext2;
715 struct context context;
716 struct role_datum *role; 745 struct role_datum *role;
717 struct type_datum *typdatum; 746 struct type_datum *typdatum;
718 struct user_datum *usrdatum; 747 struct user_datum *usrdatum;
719 char *scontextp, *p, oldc; 748 char *scontextp, *p, oldc;
720 int rc = 0; 749 int rc = 0;
721 750
722 if (!ss_initialized) { 751 context_init(ctx);
723 int i;
724
725 for (i = 1; i < SECINITSID_NUM; i++) {
726 if (!strcmp(initial_sid_to_string[i], scontext)) {
727 *sid = i;
728 goto out;
729 }
730 }
731 *sid = SECINITSID_KERNEL;
732 goto out;
733 }
734 *sid = SECSID_NULL;
735
736 /* Copy the string so that we can modify the copy as we parse it.
737 The string should already by null terminated, but we append a
738 null suffix to the copy to avoid problems with the existing
739 attr package, which doesn't view the null terminator as part
740 of the attribute value. */
741 scontext2 = kmalloc(scontext_len+1, gfp_flags);
742 if (!scontext2) {
743 rc = -ENOMEM;
744 goto out;
745 }
746 memcpy(scontext2, scontext, scontext_len);
747 scontext2[scontext_len] = 0;
748
749 context_init(&context);
750 *sid = SECSID_NULL;
751
752 POLICY_RDLOCK;
753 752
754 /* Parse the security context. */ 753 /* Parse the security context. */
755 754
756 rc = -EINVAL; 755 rc = -EINVAL;
757 scontextp = (char *) scontext2; 756 scontextp = (char *) scontext;
758 757
759 /* Extract the user. */ 758 /* Extract the user. */
760 p = scontextp; 759 p = scontextp;
@@ -762,15 +761,15 @@ static int security_context_to_sid_core(const char *scontext, u32 scontext_len,
762 p++; 761 p++;
763 762
764 if (*p == 0) 763 if (*p == 0)
765 goto out_unlock; 764 goto out;
766 765
767 *p++ = 0; 766 *p++ = 0;
768 767
769 usrdatum = hashtab_search(policydb.p_users.table, scontextp); 768 usrdatum = hashtab_search(pol->p_users.table, scontextp);
770 if (!usrdatum) 769 if (!usrdatum)
771 goto out_unlock; 770 goto out;
772 771
773 context.user = usrdatum->value; 772 ctx->user = usrdatum->value;
774 773
775 /* Extract role. */ 774 /* Extract role. */
776 scontextp = p; 775 scontextp = p;
@@ -778,14 +777,14 @@ static int security_context_to_sid_core(const char *scontext, u32 scontext_len,
778 p++; 777 p++;
779 778
780 if (*p == 0) 779 if (*p == 0)
781 goto out_unlock; 780 goto out;
782 781
783 *p++ = 0; 782 *p++ = 0;
784 783
785 role = hashtab_search(policydb.p_roles.table, scontextp); 784 role = hashtab_search(pol->p_roles.table, scontextp);
786 if (!role) 785 if (!role)
787 goto out_unlock; 786 goto out;
788 context.role = role->value; 787 ctx->role = role->value;
789 788
790 /* Extract type. */ 789 /* Extract type. */
791 scontextp = p; 790 scontextp = p;
@@ -794,33 +793,87 @@ static int security_context_to_sid_core(const char *scontext, u32 scontext_len,
794 oldc = *p; 793 oldc = *p;
795 *p++ = 0; 794 *p++ = 0;
796 795
797 typdatum = hashtab_search(policydb.p_types.table, scontextp); 796 typdatum = hashtab_search(pol->p_types.table, scontextp);
798 if (!typdatum) 797 if (!typdatum)
799 goto out_unlock; 798 goto out;
800 799
801 context.type = typdatum->value; 800 ctx->type = typdatum->value;
802 801
803 rc = mls_context_to_sid(oldc, &p, &context, &sidtab, def_sid); 802 rc = mls_context_to_sid(pol, oldc, &p, ctx, sidtabp, def_sid);
804 if (rc) 803 if (rc)
805 goto out_unlock; 804 goto out;
806 805
807 if ((p - scontext2) < scontext_len) { 806 if ((p - scontext) < scontext_len) {
808 rc = -EINVAL; 807 rc = -EINVAL;
809 goto out_unlock; 808 goto out;
810 } 809 }
811 810
812 /* Check the validity of the new context. */ 811 /* Check the validity of the new context. */
813 if (!policydb_context_isvalid(&policydb, &context)) { 812 if (!policydb_context_isvalid(pol, ctx)) {
814 rc = -EINVAL; 813 rc = -EINVAL;
815 goto out_unlock; 814 context_destroy(ctx);
815 goto out;
816 } 816 }
817 /* Obtain the new sid. */ 817 rc = 0;
818out:
819 return rc;
820}
821
822static int security_context_to_sid_core(const char *scontext, u32 scontext_len,
823 u32 *sid, u32 def_sid, gfp_t gfp_flags,
824 int force)
825{
826 char *scontext2, *str = NULL;
827 struct context context;
828 int rc = 0;
829
830 if (!ss_initialized) {
831 int i;
832
833 for (i = 1; i < SECINITSID_NUM; i++) {
834 if (!strcmp(initial_sid_to_string[i], scontext)) {
835 *sid = i;
836 return 0;
837 }
838 }
839 *sid = SECINITSID_KERNEL;
840 return 0;
841 }
842 *sid = SECSID_NULL;
843
844 /* Copy the string so that we can modify the copy as we parse it. */
845 scontext2 = kmalloc(scontext_len+1, gfp_flags);
846 if (!scontext2)
847 return -ENOMEM;
848 memcpy(scontext2, scontext, scontext_len);
849 scontext2[scontext_len] = 0;
850
851 if (force) {
852 /* Save another copy for storing in uninterpreted form */
853 str = kstrdup(scontext2, gfp_flags);
854 if (!str) {
855 kfree(scontext2);
856 return -ENOMEM;
857 }
858 }
859
860 read_lock(&policy_rwlock);
861 rc = string_to_context_struct(&policydb, &sidtab,
862 scontext2, scontext_len,
863 &context, def_sid);
864 if (rc == -EINVAL && force) {
865 context.str = str;
866 context.len = scontext_len;
867 str = NULL;
868 } else if (rc)
869 goto out;
818 rc = sidtab_context_to_sid(&sidtab, &context, sid); 870 rc = sidtab_context_to_sid(&sidtab, &context, sid);
819out_unlock: 871 if (rc)
820 POLICY_RDUNLOCK; 872 context_destroy(&context);
821 context_destroy(&context);
822 kfree(scontext2);
823out: 873out:
874 read_unlock(&policy_rwlock);
875 kfree(scontext2);
876 kfree(str);
824 return rc; 877 return rc;
825} 878}
826 879
@@ -838,7 +891,7 @@ out:
838int security_context_to_sid(const char *scontext, u32 scontext_len, u32 *sid) 891int security_context_to_sid(const char *scontext, u32 scontext_len, u32 *sid)
839{ 892{
840 return security_context_to_sid_core(scontext, scontext_len, 893 return security_context_to_sid_core(scontext, scontext_len,
841 sid, SECSID_NULL, GFP_KERNEL); 894 sid, SECSID_NULL, GFP_KERNEL, 0);
842} 895}
843 896
844/** 897/**
@@ -855,6 +908,7 @@ int security_context_to_sid(const char *scontext, u32 scontext_len, u32 *sid)
855 * The default SID is passed to the MLS layer to be used to allow 908 * The default SID is passed to the MLS layer to be used to allow
856 * kernel labeling of the MLS field if the MLS field is not present 909 * kernel labeling of the MLS field if the MLS field is not present
857 * (for upgrading to MLS without full relabel). 910 * (for upgrading to MLS without full relabel).
911 * Implicitly forces adding of the context even if it cannot be mapped yet.
858 * Returns -%EINVAL if the context is invalid, -%ENOMEM if insufficient 912 * Returns -%EINVAL if the context is invalid, -%ENOMEM if insufficient
859 * memory is available, or 0 on success. 913 * memory is available, or 0 on success.
860 */ 914 */
@@ -862,7 +916,14 @@ int security_context_to_sid_default(const char *scontext, u32 scontext_len,
862 u32 *sid, u32 def_sid, gfp_t gfp_flags) 916 u32 *sid, u32 def_sid, gfp_t gfp_flags)
863{ 917{
864 return security_context_to_sid_core(scontext, scontext_len, 918 return security_context_to_sid_core(scontext, scontext_len,
865 sid, def_sid, gfp_flags); 919 sid, def_sid, gfp_flags, 1);
920}
921
922int security_context_to_sid_force(const char *scontext, u32 scontext_len,
923 u32 *sid)
924{
925 return security_context_to_sid_core(scontext, scontext_len,
926 sid, SECSID_NULL, GFP_KERNEL, 1);
866} 927}
867 928
868static int compute_sid_handle_invalid_context( 929static int compute_sid_handle_invalid_context(
@@ -922,7 +983,7 @@ static int security_compute_sid(u32 ssid,
922 983
923 context_init(&newcontext); 984 context_init(&newcontext);
924 985
925 POLICY_RDLOCK; 986 read_lock(&policy_rwlock);
926 987
927 scontext = sidtab_search(&sidtab, ssid); 988 scontext = sidtab_search(&sidtab, ssid);
928 if (!scontext) { 989 if (!scontext) {
@@ -1027,7 +1088,7 @@ static int security_compute_sid(u32 ssid,
1027 /* Obtain the sid for the context. */ 1088 /* Obtain the sid for the context. */
1028 rc = sidtab_context_to_sid(&sidtab, &newcontext, out_sid); 1089 rc = sidtab_context_to_sid(&sidtab, &newcontext, out_sid);
1029out_unlock: 1090out_unlock:
1030 POLICY_RDUNLOCK; 1091 read_unlock(&policy_rwlock);
1031 context_destroy(&newcontext); 1092 context_destroy(&newcontext);
1032out: 1093out:
1033 return rc; 1094 return rc;
@@ -1110,6 +1171,7 @@ static int validate_classes(struct policydb *p)
1110 const struct selinux_class_perm *kdefs = &selinux_class_perm; 1171 const struct selinux_class_perm *kdefs = &selinux_class_perm;
1111 const char *def_class, *def_perm, *pol_class; 1172 const char *def_class, *def_perm, *pol_class;
1112 struct symtab *perms; 1173 struct symtab *perms;
1174 bool print_unknown_handle = 0;
1113 1175
1114 if (p->allow_unknown) { 1176 if (p->allow_unknown) {
1115 u32 num_classes = kdefs->cts_len; 1177 u32 num_classes = kdefs->cts_len;
@@ -1130,6 +1192,7 @@ static int validate_classes(struct policydb *p)
1130 return -EINVAL; 1192 return -EINVAL;
1131 if (p->allow_unknown) 1193 if (p->allow_unknown)
1132 p->undefined_perms[i-1] = ~0U; 1194 p->undefined_perms[i-1] = ~0U;
1195 print_unknown_handle = 1;
1133 continue; 1196 continue;
1134 } 1197 }
1135 pol_class = p->p_class_val_to_name[i-1]; 1198 pol_class = p->p_class_val_to_name[i-1];
@@ -1159,6 +1222,7 @@ static int validate_classes(struct policydb *p)
1159 return -EINVAL; 1222 return -EINVAL;
1160 if (p->allow_unknown) 1223 if (p->allow_unknown)
1161 p->undefined_perms[class_val-1] |= perm_val; 1224 p->undefined_perms[class_val-1] |= perm_val;
1225 print_unknown_handle = 1;
1162 continue; 1226 continue;
1163 } 1227 }
1164 perdatum = hashtab_search(perms->table, def_perm); 1228 perdatum = hashtab_search(perms->table, def_perm);
@@ -1206,6 +1270,7 @@ static int validate_classes(struct policydb *p)
1206 return -EINVAL; 1270 return -EINVAL;
1207 if (p->allow_unknown) 1271 if (p->allow_unknown)
1208 p->undefined_perms[class_val-1] |= (1 << j); 1272 p->undefined_perms[class_val-1] |= (1 << j);
1273 print_unknown_handle = 1;
1209 continue; 1274 continue;
1210 } 1275 }
1211 perdatum = hashtab_search(perms->table, def_perm); 1276 perdatum = hashtab_search(perms->table, def_perm);
@@ -1223,6 +1288,9 @@ static int validate_classes(struct policydb *p)
1223 } 1288 }
1224 } 1289 }
1225 } 1290 }
1291 if (print_unknown_handle)
1292 printk(KERN_INFO "SELinux: the above unknown classes and permissions will be %s\n",
1293 (security_get_allow_unknown() ? "allowed" : "denied"));
1226 return 0; 1294 return 0;
1227} 1295}
1228 1296
@@ -1246,9 +1314,12 @@ static inline int convert_context_handle_invalid_context(struct context *context
1246 char *s; 1314 char *s;
1247 u32 len; 1315 u32 len;
1248 1316
1249 context_struct_to_string(context, &s, &len); 1317 if (!context_struct_to_string(context, &s, &len)) {
1250 printk(KERN_ERR "SELinux: context %s is invalid\n", s); 1318 printk(KERN_WARNING
1251 kfree(s); 1319 "SELinux: Context %s would be invalid if enforcing\n",
1320 s);
1321 kfree(s);
1322 }
1252 } 1323 }
1253 return rc; 1324 return rc;
1254} 1325}
@@ -1280,6 +1351,37 @@ static int convert_context(u32 key,
1280 1351
1281 args = p; 1352 args = p;
1282 1353
1354 if (c->str) {
1355 struct context ctx;
1356 s = kstrdup(c->str, GFP_KERNEL);
1357 if (!s) {
1358 rc = -ENOMEM;
1359 goto out;
1360 }
1361 rc = string_to_context_struct(args->newp, NULL, s,
1362 c->len, &ctx, SECSID_NULL);
1363 kfree(s);
1364 if (!rc) {
1365 printk(KERN_INFO
1366 "SELinux: Context %s became valid (mapped).\n",
1367 c->str);
1368 /* Replace string with mapped representation. */
1369 kfree(c->str);
1370 memcpy(c, &ctx, sizeof(*c));
1371 goto out;
1372 } else if (rc == -EINVAL) {
1373 /* Retain string representation for later mapping. */
1374 rc = 0;
1375 goto out;
1376 } else {
1377 /* Other error condition, e.g. ENOMEM. */
1378 printk(KERN_ERR
1379 "SELinux: Unable to map context %s, rc = %d.\n",
1380 c->str, -rc);
1381 goto out;
1382 }
1383 }
1384
1283 rc = context_cpy(&oldc, c); 1385 rc = context_cpy(&oldc, c);
1284 if (rc) 1386 if (rc)
1285 goto out; 1387 goto out;
@@ -1319,13 +1421,21 @@ static int convert_context(u32 key,
1319 } 1421 }
1320 1422
1321 context_destroy(&oldc); 1423 context_destroy(&oldc);
1424 rc = 0;
1322out: 1425out:
1323 return rc; 1426 return rc;
1324bad: 1427bad:
1325 context_struct_to_string(&oldc, &s, &len); 1428 /* Map old representation to string and save it. */
1429 if (context_struct_to_string(&oldc, &s, &len))
1430 return -ENOMEM;
1326 context_destroy(&oldc); 1431 context_destroy(&oldc);
1327 printk(KERN_ERR "SELinux: invalidating context %s\n", s); 1432 context_destroy(c);
1328 kfree(s); 1433 c->str = s;
1434 c->len = len;
1435 printk(KERN_INFO
1436 "SELinux: Context %s became invalid (unmapped).\n",
1437 c->str);
1438 rc = 0;
1329 goto out; 1439 goto out;
1330} 1440}
1331 1441
@@ -1359,17 +1469,13 @@ int security_load_policy(void *data, size_t len)
1359 int rc = 0; 1469 int rc = 0;
1360 struct policy_file file = { data, len }, *fp = &file; 1470 struct policy_file file = { data, len }, *fp = &file;
1361 1471
1362 LOAD_LOCK;
1363
1364 if (!ss_initialized) { 1472 if (!ss_initialized) {
1365 avtab_cache_init(); 1473 avtab_cache_init();
1366 if (policydb_read(&policydb, fp)) { 1474 if (policydb_read(&policydb, fp)) {
1367 LOAD_UNLOCK;
1368 avtab_cache_destroy(); 1475 avtab_cache_destroy();
1369 return -EINVAL; 1476 return -EINVAL;
1370 } 1477 }
1371 if (policydb_load_isids(&policydb, &sidtab)) { 1478 if (policydb_load_isids(&policydb, &sidtab)) {
1372 LOAD_UNLOCK;
1373 policydb_destroy(&policydb); 1479 policydb_destroy(&policydb);
1374 avtab_cache_destroy(); 1480 avtab_cache_destroy();
1375 return -EINVAL; 1481 return -EINVAL;
@@ -1378,7 +1484,6 @@ int security_load_policy(void *data, size_t len)
1378 if (validate_classes(&policydb)) { 1484 if (validate_classes(&policydb)) {
1379 printk(KERN_ERR 1485 printk(KERN_ERR
1380 "SELinux: the definition of a class is incorrect\n"); 1486 "SELinux: the definition of a class is incorrect\n");
1381 LOAD_UNLOCK;
1382 sidtab_destroy(&sidtab); 1487 sidtab_destroy(&sidtab);
1383 policydb_destroy(&policydb); 1488 policydb_destroy(&policydb);
1384 avtab_cache_destroy(); 1489 avtab_cache_destroy();
@@ -1388,7 +1493,6 @@ int security_load_policy(void *data, size_t len)
1388 policydb_loaded_version = policydb.policyvers; 1493 policydb_loaded_version = policydb.policyvers;
1389 ss_initialized = 1; 1494 ss_initialized = 1;
1390 seqno = ++latest_granting; 1495 seqno = ++latest_granting;
1391 LOAD_UNLOCK;
1392 selinux_complete_init(); 1496 selinux_complete_init();
1393 avc_ss_reset(seqno); 1497 avc_ss_reset(seqno);
1394 selnl_notify_policyload(seqno); 1498 selnl_notify_policyload(seqno);
@@ -1401,12 +1505,13 @@ int security_load_policy(void *data, size_t len)
1401 sidtab_hash_eval(&sidtab, "sids"); 1505 sidtab_hash_eval(&sidtab, "sids");
1402#endif 1506#endif
1403 1507
1404 if (policydb_read(&newpolicydb, fp)) { 1508 if (policydb_read(&newpolicydb, fp))
1405 LOAD_UNLOCK;
1406 return -EINVAL; 1509 return -EINVAL;
1407 }
1408 1510
1409 sidtab_init(&newsidtab); 1511 if (sidtab_init(&newsidtab)) {
1512 policydb_destroy(&newpolicydb);
1513 return -ENOMEM;
1514 }
1410 1515
1411 /* Verify that the kernel defined classes are correct. */ 1516 /* Verify that the kernel defined classes are correct. */
1412 if (validate_classes(&newpolicydb)) { 1517 if (validate_classes(&newpolicydb)) {
@@ -1429,25 +1534,28 @@ int security_load_policy(void *data, size_t len)
1429 goto err; 1534 goto err;
1430 } 1535 }
1431 1536
1432 /* Convert the internal representations of contexts 1537 /*
1433 in the new SID table and remove invalid SIDs. */ 1538 * Convert the internal representations of contexts
1539 * in the new SID table.
1540 */
1434 args.oldp = &policydb; 1541 args.oldp = &policydb;
1435 args.newp = &newpolicydb; 1542 args.newp = &newpolicydb;
1436 sidtab_map_remove_on_error(&newsidtab, convert_context, &args); 1543 rc = sidtab_map(&newsidtab, convert_context, &args);
1544 if (rc)
1545 goto err;
1437 1546
1438 /* Save the old policydb and SID table to free later. */ 1547 /* Save the old policydb and SID table to free later. */
1439 memcpy(&oldpolicydb, &policydb, sizeof policydb); 1548 memcpy(&oldpolicydb, &policydb, sizeof policydb);
1440 sidtab_set(&oldsidtab, &sidtab); 1549 sidtab_set(&oldsidtab, &sidtab);
1441 1550
1442 /* Install the new policydb and SID table. */ 1551 /* Install the new policydb and SID table. */
1443 POLICY_WRLOCK; 1552 write_lock_irq(&policy_rwlock);
1444 memcpy(&policydb, &newpolicydb, sizeof policydb); 1553 memcpy(&policydb, &newpolicydb, sizeof policydb);
1445 sidtab_set(&sidtab, &newsidtab); 1554 sidtab_set(&sidtab, &newsidtab);
1446 security_load_policycaps(); 1555 security_load_policycaps();
1447 seqno = ++latest_granting; 1556 seqno = ++latest_granting;
1448 policydb_loaded_version = policydb.policyvers; 1557 policydb_loaded_version = policydb.policyvers;
1449 POLICY_WRUNLOCK; 1558 write_unlock_irq(&policy_rwlock);
1450 LOAD_UNLOCK;
1451 1559
1452 /* Free the old policydb and SID table. */ 1560 /* Free the old policydb and SID table. */
1453 policydb_destroy(&oldpolicydb); 1561 policydb_destroy(&oldpolicydb);
@@ -1461,7 +1569,6 @@ int security_load_policy(void *data, size_t len)
1461 return 0; 1569 return 0;
1462 1570
1463err: 1571err:
1464 LOAD_UNLOCK;
1465 sidtab_destroy(&newsidtab); 1572 sidtab_destroy(&newsidtab);
1466 policydb_destroy(&newpolicydb); 1573 policydb_destroy(&newpolicydb);
1467 return rc; 1574 return rc;
@@ -1479,7 +1586,7 @@ int security_port_sid(u8 protocol, u16 port, u32 *out_sid)
1479 struct ocontext *c; 1586 struct ocontext *c;
1480 int rc = 0; 1587 int rc = 0;
1481 1588
1482 POLICY_RDLOCK; 1589 read_lock(&policy_rwlock);
1483 1590
1484 c = policydb.ocontexts[OCON_PORT]; 1591 c = policydb.ocontexts[OCON_PORT];
1485 while (c) { 1592 while (c) {
@@ -1504,7 +1611,7 @@ int security_port_sid(u8 protocol, u16 port, u32 *out_sid)
1504 } 1611 }
1505 1612
1506out: 1613out:
1507 POLICY_RDUNLOCK; 1614 read_unlock(&policy_rwlock);
1508 return rc; 1615 return rc;
1509} 1616}
1510 1617
@@ -1518,7 +1625,7 @@ int security_netif_sid(char *name, u32 *if_sid)
1518 int rc = 0; 1625 int rc = 0;
1519 struct ocontext *c; 1626 struct ocontext *c;
1520 1627
1521 POLICY_RDLOCK; 1628 read_lock(&policy_rwlock);
1522 1629
1523 c = policydb.ocontexts[OCON_NETIF]; 1630 c = policydb.ocontexts[OCON_NETIF];
1524 while (c) { 1631 while (c) {
@@ -1545,7 +1652,7 @@ int security_netif_sid(char *name, u32 *if_sid)
1545 *if_sid = SECINITSID_NETIF; 1652 *if_sid = SECINITSID_NETIF;
1546 1653
1547out: 1654out:
1548 POLICY_RDUNLOCK; 1655 read_unlock(&policy_rwlock);
1549 return rc; 1656 return rc;
1550} 1657}
1551 1658
@@ -1577,7 +1684,7 @@ int security_node_sid(u16 domain,
1577 int rc = 0; 1684 int rc = 0;
1578 struct ocontext *c; 1685 struct ocontext *c;
1579 1686
1580 POLICY_RDLOCK; 1687 read_lock(&policy_rwlock);
1581 1688
1582 switch (domain) { 1689 switch (domain) {
1583 case AF_INET: { 1690 case AF_INET: {
@@ -1632,7 +1739,7 @@ int security_node_sid(u16 domain,
1632 } 1739 }
1633 1740
1634out: 1741out:
1635 POLICY_RDUNLOCK; 1742 read_unlock(&policy_rwlock);
1636 return rc; 1743 return rc;
1637} 1744}
1638 1745
@@ -1671,7 +1778,9 @@ int security_get_user_sids(u32 fromsid,
1671 if (!ss_initialized) 1778 if (!ss_initialized)
1672 goto out; 1779 goto out;
1673 1780
1674 POLICY_RDLOCK; 1781 read_lock(&policy_rwlock);
1782
1783 context_init(&usercon);
1675 1784
1676 fromcon = sidtab_search(&sidtab, fromsid); 1785 fromcon = sidtab_search(&sidtab, fromsid);
1677 if (!fromcon) { 1786 if (!fromcon) {
@@ -1722,7 +1831,7 @@ int security_get_user_sids(u32 fromsid,
1722 } 1831 }
1723 1832
1724out_unlock: 1833out_unlock:
1725 POLICY_RDUNLOCK; 1834 read_unlock(&policy_rwlock);
1726 if (rc || !mynel) { 1835 if (rc || !mynel) {
1727 kfree(mysids); 1836 kfree(mysids);
1728 goto out; 1837 goto out;
@@ -1775,7 +1884,7 @@ int security_genfs_sid(const char *fstype,
1775 while (path[0] == '/' && path[1] == '/') 1884 while (path[0] == '/' && path[1] == '/')
1776 path++; 1885 path++;
1777 1886
1778 POLICY_RDLOCK; 1887 read_lock(&policy_rwlock);
1779 1888
1780 for (genfs = policydb.genfs; genfs; genfs = genfs->next) { 1889 for (genfs = policydb.genfs; genfs; genfs = genfs->next) {
1781 cmp = strcmp(fstype, genfs->fstype); 1890 cmp = strcmp(fstype, genfs->fstype);
@@ -1812,7 +1921,7 @@ int security_genfs_sid(const char *fstype,
1812 1921
1813 *sid = c->sid[0]; 1922 *sid = c->sid[0];
1814out: 1923out:
1815 POLICY_RDUNLOCK; 1924 read_unlock(&policy_rwlock);
1816 return rc; 1925 return rc;
1817} 1926}
1818 1927
@@ -1825,12 +1934,13 @@ out:
1825int security_fs_use( 1934int security_fs_use(
1826 const char *fstype, 1935 const char *fstype,
1827 unsigned int *behavior, 1936 unsigned int *behavior,
1828 u32 *sid) 1937 u32 *sid,
1938 bool can_xattr)
1829{ 1939{
1830 int rc = 0; 1940 int rc = 0;
1831 struct ocontext *c; 1941 struct ocontext *c;
1832 1942
1833 POLICY_RDLOCK; 1943 read_lock(&policy_rwlock);
1834 1944
1835 c = policydb.ocontexts[OCON_FSUSE]; 1945 c = policydb.ocontexts[OCON_FSUSE];
1836 while (c) { 1946 while (c) {
@@ -1839,6 +1949,7 @@ int security_fs_use(
1839 c = c->next; 1949 c = c->next;
1840 } 1950 }
1841 1951
1952 /* look for labeling behavior defined in policy */
1842 if (c) { 1953 if (c) {
1843 *behavior = c->v.behavior; 1954 *behavior = c->v.behavior;
1844 if (!c->sid[0]) { 1955 if (!c->sid[0]) {
@@ -1849,18 +1960,27 @@ int security_fs_use(
1849 goto out; 1960 goto out;
1850 } 1961 }
1851 *sid = c->sid[0]; 1962 *sid = c->sid[0];
1963 goto out;
1964 }
1965
1966 /* labeling behavior not in policy, use xattrs if possible */
1967 if (can_xattr) {
1968 *behavior = SECURITY_FS_USE_XATTR;
1969 *sid = SECINITSID_FS;
1970 goto out;
1971 }
1972
1973 /* no behavior in policy and can't use xattrs, try GENFS */
1974 rc = security_genfs_sid(fstype, "/", SECCLASS_DIR, sid);
1975 if (rc) {
1976 *behavior = SECURITY_FS_USE_NONE;
1977 rc = 0;
1852 } else { 1978 } else {
1853 rc = security_genfs_sid(fstype, "/", SECCLASS_DIR, sid); 1979 *behavior = SECURITY_FS_USE_GENFS;
1854 if (rc) {
1855 *behavior = SECURITY_FS_USE_NONE;
1856 rc = 0;
1857 } else {
1858 *behavior = SECURITY_FS_USE_GENFS;
1859 }
1860 } 1980 }
1861 1981
1862out: 1982out:
1863 POLICY_RDUNLOCK; 1983 read_unlock(&policy_rwlock);
1864 return rc; 1984 return rc;
1865} 1985}
1866 1986
@@ -1868,7 +1988,7 @@ int security_get_bools(int *len, char ***names, int **values)
1868{ 1988{
1869 int i, rc = -ENOMEM; 1989 int i, rc = -ENOMEM;
1870 1990
1871 POLICY_RDLOCK; 1991 read_lock(&policy_rwlock);
1872 *names = NULL; 1992 *names = NULL;
1873 *values = NULL; 1993 *values = NULL;
1874 1994
@@ -1898,7 +2018,7 @@ int security_get_bools(int *len, char ***names, int **values)
1898 } 2018 }
1899 rc = 0; 2019 rc = 0;
1900out: 2020out:
1901 POLICY_RDUNLOCK; 2021 read_unlock(&policy_rwlock);
1902 return rc; 2022 return rc;
1903err: 2023err:
1904 if (*names) { 2024 if (*names) {
@@ -1916,7 +2036,7 @@ int security_set_bools(int len, int *values)
1916 int lenp, seqno = 0; 2036 int lenp, seqno = 0;
1917 struct cond_node *cur; 2037 struct cond_node *cur;
1918 2038
1919 POLICY_WRLOCK; 2039 write_lock_irq(&policy_rwlock);
1920 2040
1921 lenp = policydb.p_bools.nprim; 2041 lenp = policydb.p_bools.nprim;
1922 if (len != lenp) { 2042 if (len != lenp) {
@@ -1950,7 +2070,7 @@ int security_set_bools(int len, int *values)
1950 seqno = ++latest_granting; 2070 seqno = ++latest_granting;
1951 2071
1952out: 2072out:
1953 POLICY_WRUNLOCK; 2073 write_unlock_irq(&policy_rwlock);
1954 if (!rc) { 2074 if (!rc) {
1955 avc_ss_reset(seqno); 2075 avc_ss_reset(seqno);
1956 selnl_notify_policyload(seqno); 2076 selnl_notify_policyload(seqno);
@@ -1964,7 +2084,7 @@ int security_get_bool_value(int bool)
1964 int rc = 0; 2084 int rc = 0;
1965 int len; 2085 int len;
1966 2086
1967 POLICY_RDLOCK; 2087 read_lock(&policy_rwlock);
1968 2088
1969 len = policydb.p_bools.nprim; 2089 len = policydb.p_bools.nprim;
1970 if (bool >= len) { 2090 if (bool >= len) {
@@ -1974,7 +2094,7 @@ int security_get_bool_value(int bool)
1974 2094
1975 rc = policydb.bool_val_to_struct[bool]->state; 2095 rc = policydb.bool_val_to_struct[bool]->state;
1976out: 2096out:
1977 POLICY_RDUNLOCK; 2097 read_unlock(&policy_rwlock);
1978 return rc; 2098 return rc;
1979} 2099}
1980 2100
@@ -2029,7 +2149,7 @@ int security_sid_mls_copy(u32 sid, u32 mls_sid, u32 *new_sid)
2029 2149
2030 context_init(&newcon); 2150 context_init(&newcon);
2031 2151
2032 POLICY_RDLOCK; 2152 read_lock(&policy_rwlock);
2033 context1 = sidtab_search(&sidtab, sid); 2153 context1 = sidtab_search(&sidtab, sid);
2034 if (!context1) { 2154 if (!context1) {
2035 printk(KERN_ERR "SELinux: %s: unrecognized SID %d\n", 2155 printk(KERN_ERR "SELinux: %s: unrecognized SID %d\n",
@@ -2071,7 +2191,7 @@ bad:
2071 } 2191 }
2072 2192
2073out_unlock: 2193out_unlock:
2074 POLICY_RDUNLOCK; 2194 read_unlock(&policy_rwlock);
2075 context_destroy(&newcon); 2195 context_destroy(&newcon);
2076out: 2196out:
2077 return rc; 2197 return rc;
@@ -2128,7 +2248,7 @@ int security_net_peersid_resolve(u32 nlbl_sid, u32 nlbl_type,
2128 return 0; 2248 return 0;
2129 } 2249 }
2130 2250
2131 POLICY_RDLOCK; 2251 read_lock(&policy_rwlock);
2132 2252
2133 nlbl_ctx = sidtab_search(&sidtab, nlbl_sid); 2253 nlbl_ctx = sidtab_search(&sidtab, nlbl_sid);
2134 if (!nlbl_ctx) { 2254 if (!nlbl_ctx) {
@@ -2147,7 +2267,7 @@ int security_net_peersid_resolve(u32 nlbl_sid, u32 nlbl_type,
2147 rc = (mls_context_cmp(nlbl_ctx, xfrm_ctx) ? 0 : -EACCES); 2267 rc = (mls_context_cmp(nlbl_ctx, xfrm_ctx) ? 0 : -EACCES);
2148 2268
2149out_slowpath: 2269out_slowpath:
2150 POLICY_RDUNLOCK; 2270 read_unlock(&policy_rwlock);
2151 if (rc == 0) 2271 if (rc == 0)
2152 /* at present NetLabel SIDs/labels really only carry MLS 2272 /* at present NetLabel SIDs/labels really only carry MLS
2153 * information so if the MLS portion of the NetLabel SID 2273 * information so if the MLS portion of the NetLabel SID
@@ -2177,7 +2297,7 @@ int security_get_classes(char ***classes, int *nclasses)
2177{ 2297{
2178 int rc = -ENOMEM; 2298 int rc = -ENOMEM;
2179 2299
2180 POLICY_RDLOCK; 2300 read_lock(&policy_rwlock);
2181 2301
2182 *nclasses = policydb.p_classes.nprim; 2302 *nclasses = policydb.p_classes.nprim;
2183 *classes = kcalloc(*nclasses, sizeof(*classes), GFP_ATOMIC); 2303 *classes = kcalloc(*nclasses, sizeof(*classes), GFP_ATOMIC);
@@ -2194,7 +2314,7 @@ int security_get_classes(char ***classes, int *nclasses)
2194 } 2314 }
2195 2315
2196out: 2316out:
2197 POLICY_RDUNLOCK; 2317 read_unlock(&policy_rwlock);
2198 return rc; 2318 return rc;
2199} 2319}
2200 2320
@@ -2216,7 +2336,7 @@ int security_get_permissions(char *class, char ***perms, int *nperms)
2216 int rc = -ENOMEM, i; 2336 int rc = -ENOMEM, i;
2217 struct class_datum *match; 2337 struct class_datum *match;
2218 2338
2219 POLICY_RDLOCK; 2339 read_lock(&policy_rwlock);
2220 2340
2221 match = hashtab_search(policydb.p_classes.table, class); 2341 match = hashtab_search(policydb.p_classes.table, class);
2222 if (!match) { 2342 if (!match) {
@@ -2244,11 +2364,11 @@ int security_get_permissions(char *class, char ***perms, int *nperms)
2244 goto err; 2364 goto err;
2245 2365
2246out: 2366out:
2247 POLICY_RDUNLOCK; 2367 read_unlock(&policy_rwlock);
2248 return rc; 2368 return rc;
2249 2369
2250err: 2370err:
2251 POLICY_RDUNLOCK; 2371 read_unlock(&policy_rwlock);
2252 for (i = 0; i < *nperms; i++) 2372 for (i = 0; i < *nperms; i++)
2253 kfree((*perms)[i]); 2373 kfree((*perms)[i]);
2254 kfree(*perms); 2374 kfree(*perms);
@@ -2279,9 +2399,9 @@ int security_policycap_supported(unsigned int req_cap)
2279{ 2399{
2280 int rc; 2400 int rc;
2281 2401
2282 POLICY_RDLOCK; 2402 read_lock(&policy_rwlock);
2283 rc = ebitmap_get_bit(&policydb.policycaps, req_cap); 2403 rc = ebitmap_get_bit(&policydb.policycaps, req_cap);
2284 POLICY_RDUNLOCK; 2404 read_unlock(&policy_rwlock);
2285 2405
2286 return rc; 2406 return rc;
2287} 2407}
@@ -2345,7 +2465,7 @@ int selinux_audit_rule_init(u32 field, u32 op, char *rulestr, void **vrule)
2345 2465
2346 context_init(&tmprule->au_ctxt); 2466 context_init(&tmprule->au_ctxt);
2347 2467
2348 POLICY_RDLOCK; 2468 read_lock(&policy_rwlock);
2349 2469
2350 tmprule->au_seqno = latest_granting; 2470 tmprule->au_seqno = latest_granting;
2351 2471
@@ -2382,7 +2502,7 @@ int selinux_audit_rule_init(u32 field, u32 op, char *rulestr, void **vrule)
2382 break; 2502 break;
2383 } 2503 }
2384 2504
2385 POLICY_RDUNLOCK; 2505 read_unlock(&policy_rwlock);
2386 2506
2387 if (rc) { 2507 if (rc) {
2388 selinux_audit_rule_free(tmprule); 2508 selinux_audit_rule_free(tmprule);
@@ -2420,7 +2540,7 @@ int selinux_audit_rule_known(struct audit_krule *rule)
2420} 2540}
2421 2541
2422int selinux_audit_rule_match(u32 sid, u32 field, u32 op, void *vrule, 2542int selinux_audit_rule_match(u32 sid, u32 field, u32 op, void *vrule,
2423 struct audit_context *actx) 2543 struct audit_context *actx)
2424{ 2544{
2425 struct context *ctxt; 2545 struct context *ctxt;
2426 struct mls_level *level; 2546 struct mls_level *level;
@@ -2433,7 +2553,7 @@ int selinux_audit_rule_match(u32 sid, u32 field, u32 op, void *vrule,
2433 return -ENOENT; 2553 return -ENOENT;
2434 } 2554 }
2435 2555
2436 POLICY_RDLOCK; 2556 read_lock(&policy_rwlock);
2437 2557
2438 if (rule->au_seqno < latest_granting) { 2558 if (rule->au_seqno < latest_granting) {
2439 audit_log(actx, GFP_ATOMIC, AUDIT_SELINUX_ERR, 2559 audit_log(actx, GFP_ATOMIC, AUDIT_SELINUX_ERR,
@@ -2527,14 +2647,14 @@ int selinux_audit_rule_match(u32 sid, u32 field, u32 op, void *vrule,
2527 } 2647 }
2528 2648
2529out: 2649out:
2530 POLICY_RDUNLOCK; 2650 read_unlock(&policy_rwlock);
2531 return match; 2651 return match;
2532} 2652}
2533 2653
2534static int (*aurule_callback)(void) = audit_update_lsm_rules; 2654static int (*aurule_callback)(void) = audit_update_lsm_rules;
2535 2655
2536static int aurule_avc_callback(u32 event, u32 ssid, u32 tsid, 2656static int aurule_avc_callback(u32 event, u32 ssid, u32 tsid,
2537 u16 class, u32 perms, u32 *retained) 2657 u16 class, u32 perms, u32 *retained)
2538{ 2658{
2539 int err = 0; 2659 int err = 0;
2540 2660
@@ -2615,7 +2735,7 @@ int security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr,
2615 return 0; 2735 return 0;
2616 } 2736 }
2617 2737
2618 POLICY_RDLOCK; 2738 read_lock(&policy_rwlock);
2619 2739
2620 if (secattr->flags & NETLBL_SECATTR_CACHE) { 2740 if (secattr->flags & NETLBL_SECATTR_CACHE) {
2621 *sid = *(u32 *)secattr->cache->data; 2741 *sid = *(u32 *)secattr->cache->data;
@@ -2660,7 +2780,7 @@ int security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr,
2660 } 2780 }
2661 2781
2662netlbl_secattr_to_sid_return: 2782netlbl_secattr_to_sid_return:
2663 POLICY_RDUNLOCK; 2783 read_unlock(&policy_rwlock);
2664 return rc; 2784 return rc;
2665netlbl_secattr_to_sid_return_cleanup: 2785netlbl_secattr_to_sid_return_cleanup:
2666 ebitmap_destroy(&ctx_new.range.level[0].cat); 2786 ebitmap_destroy(&ctx_new.range.level[0].cat);
@@ -2685,7 +2805,7 @@ int security_netlbl_sid_to_secattr(u32 sid, struct netlbl_lsm_secattr *secattr)
2685 if (!ss_initialized) 2805 if (!ss_initialized)
2686 return 0; 2806 return 0;
2687 2807
2688 POLICY_RDLOCK; 2808 read_lock(&policy_rwlock);
2689 ctx = sidtab_search(&sidtab, sid); 2809 ctx = sidtab_search(&sidtab, sid);
2690 if (ctx == NULL) 2810 if (ctx == NULL)
2691 goto netlbl_sid_to_secattr_failure; 2811 goto netlbl_sid_to_secattr_failure;
@@ -2696,12 +2816,12 @@ int security_netlbl_sid_to_secattr(u32 sid, struct netlbl_lsm_secattr *secattr)
2696 rc = mls_export_netlbl_cat(ctx, secattr); 2816 rc = mls_export_netlbl_cat(ctx, secattr);
2697 if (rc != 0) 2817 if (rc != 0)
2698 goto netlbl_sid_to_secattr_failure; 2818 goto netlbl_sid_to_secattr_failure;
2699 POLICY_RDUNLOCK; 2819 read_unlock(&policy_rwlock);
2700 2820
2701 return 0; 2821 return 0;
2702 2822
2703netlbl_sid_to_secattr_failure: 2823netlbl_sid_to_secattr_failure:
2704 POLICY_RDUNLOCK; 2824 read_unlock(&policy_rwlock);
2705 return rc; 2825 return rc;
2706} 2826}
2707#endif /* CONFIG_NETLABEL */ 2827#endif /* CONFIG_NETLABEL */
diff --git a/security/selinux/ss/sidtab.c b/security/selinux/ss/sidtab.c
index 4a516ff4bcde..a81ded104129 100644
--- a/security/selinux/ss/sidtab.c
+++ b/security/selinux/ss/sidtab.c
@@ -14,10 +14,6 @@
14#define SIDTAB_HASH(sid) \ 14#define SIDTAB_HASH(sid) \
15(sid & SIDTAB_HASH_MASK) 15(sid & SIDTAB_HASH_MASK)
16 16
17#define INIT_SIDTAB_LOCK(s) spin_lock_init(&s->lock)
18#define SIDTAB_LOCK(s, x) spin_lock_irqsave(&s->lock, x)
19#define SIDTAB_UNLOCK(s, x) spin_unlock_irqrestore(&s->lock, x)
20
21int sidtab_init(struct sidtab *s) 17int sidtab_init(struct sidtab *s)
22{ 18{
23 int i; 19 int i;
@@ -30,7 +26,7 @@ int sidtab_init(struct sidtab *s)
30 s->nel = 0; 26 s->nel = 0;
31 s->next_sid = 1; 27 s->next_sid = 1;
32 s->shutdown = 0; 28 s->shutdown = 0;
33 INIT_SIDTAB_LOCK(s); 29 spin_lock_init(&s->lock);
34 return 0; 30 return 0;
35} 31}
36 32
@@ -86,7 +82,7 @@ out:
86 return rc; 82 return rc;
87} 83}
88 84
89struct context *sidtab_search(struct sidtab *s, u32 sid) 85static struct context *sidtab_search_core(struct sidtab *s, u32 sid, int force)
90{ 86{
91 int hvalue; 87 int hvalue;
92 struct sidtab_node *cur; 88 struct sidtab_node *cur;
@@ -99,7 +95,10 @@ struct context *sidtab_search(struct sidtab *s, u32 sid)
99 while (cur != NULL && sid > cur->sid) 95 while (cur != NULL && sid > cur->sid)
100 cur = cur->next; 96 cur = cur->next;
101 97
102 if (cur == NULL || sid != cur->sid) { 98 if (force && cur && sid == cur->sid && cur->context.len)
99 return &cur->context;
100
101 if (cur == NULL || sid != cur->sid || cur->context.len) {
103 /* Remap invalid SIDs to the unlabeled SID. */ 102 /* Remap invalid SIDs to the unlabeled SID. */
104 sid = SECINITSID_UNLABELED; 103 sid = SECINITSID_UNLABELED;
105 hvalue = SIDTAB_HASH(sid); 104 hvalue = SIDTAB_HASH(sid);
@@ -113,6 +112,16 @@ struct context *sidtab_search(struct sidtab *s, u32 sid)
113 return &cur->context; 112 return &cur->context;
114} 113}
115 114
115struct context *sidtab_search(struct sidtab *s, u32 sid)
116{
117 return sidtab_search_core(s, sid, 0);
118}
119
120struct context *sidtab_search_force(struct sidtab *s, u32 sid)
121{
122 return sidtab_search_core(s, sid, 1);
123}
124
116int sidtab_map(struct sidtab *s, 125int sidtab_map(struct sidtab *s,
117 int (*apply) (u32 sid, 126 int (*apply) (u32 sid,
118 struct context *context, 127 struct context *context,
@@ -138,43 +147,6 @@ out:
138 return rc; 147 return rc;
139} 148}
140 149
141void sidtab_map_remove_on_error(struct sidtab *s,
142 int (*apply) (u32 sid,
143 struct context *context,
144 void *args),
145 void *args)
146{
147 int i, ret;
148 struct sidtab_node *last, *cur, *temp;
149
150 if (!s)
151 return;
152
153 for (i = 0; i < SIDTAB_SIZE; i++) {
154 last = NULL;
155 cur = s->htable[i];
156 while (cur != NULL) {
157 ret = apply(cur->sid, &cur->context, args);
158 if (ret) {
159 if (last)
160 last->next = cur->next;
161 else
162 s->htable[i] = cur->next;
163 temp = cur;
164 cur = cur->next;
165 context_destroy(&temp->context);
166 kfree(temp);
167 s->nel--;
168 } else {
169 last = cur;
170 cur = cur->next;
171 }
172 }
173 }
174
175 return;
176}
177
178static inline u32 sidtab_search_context(struct sidtab *s, 150static inline u32 sidtab_search_context(struct sidtab *s,
179 struct context *context) 151 struct context *context)
180{ 152{
@@ -204,7 +176,7 @@ int sidtab_context_to_sid(struct sidtab *s,
204 176
205 sid = sidtab_search_context(s, context); 177 sid = sidtab_search_context(s, context);
206 if (!sid) { 178 if (!sid) {
207 SIDTAB_LOCK(s, flags); 179 spin_lock_irqsave(&s->lock, flags);
208 /* Rescan now that we hold the lock. */ 180 /* Rescan now that we hold the lock. */
209 sid = sidtab_search_context(s, context); 181 sid = sidtab_search_context(s, context);
210 if (sid) 182 if (sid)
@@ -215,11 +187,15 @@ int sidtab_context_to_sid(struct sidtab *s,
215 goto unlock_out; 187 goto unlock_out;
216 } 188 }
217 sid = s->next_sid++; 189 sid = s->next_sid++;
190 if (context->len)
191 printk(KERN_INFO
192 "SELinux: Context %s is not valid (left unmapped).\n",
193 context->str);
218 ret = sidtab_insert(s, sid, context); 194 ret = sidtab_insert(s, sid, context);
219 if (ret) 195 if (ret)
220 s->next_sid--; 196 s->next_sid--;
221unlock_out: 197unlock_out:
222 SIDTAB_UNLOCK(s, flags); 198 spin_unlock_irqrestore(&s->lock, flags);
223 } 199 }
224 200
225 if (ret) 201 if (ret)
@@ -284,19 +260,19 @@ void sidtab_set(struct sidtab *dst, struct sidtab *src)
284{ 260{
285 unsigned long flags; 261 unsigned long flags;
286 262
287 SIDTAB_LOCK(src, flags); 263 spin_lock_irqsave(&src->lock, flags);
288 dst->htable = src->htable; 264 dst->htable = src->htable;
289 dst->nel = src->nel; 265 dst->nel = src->nel;
290 dst->next_sid = src->next_sid; 266 dst->next_sid = src->next_sid;
291 dst->shutdown = 0; 267 dst->shutdown = 0;
292 SIDTAB_UNLOCK(src, flags); 268 spin_unlock_irqrestore(&src->lock, flags);
293} 269}
294 270
295void sidtab_shutdown(struct sidtab *s) 271void sidtab_shutdown(struct sidtab *s)
296{ 272{
297 unsigned long flags; 273 unsigned long flags;
298 274
299 SIDTAB_LOCK(s, flags); 275 spin_lock_irqsave(&s->lock, flags);
300 s->shutdown = 1; 276 s->shutdown = 1;
301 SIDTAB_UNLOCK(s, flags); 277 spin_unlock_irqrestore(&s->lock, flags);
302} 278}
diff --git a/security/selinux/ss/sidtab.h b/security/selinux/ss/sidtab.h
index 2fe9dfa3eb3a..64ea5b1cdea4 100644
--- a/security/selinux/ss/sidtab.h
+++ b/security/selinux/ss/sidtab.h
@@ -32,6 +32,7 @@ struct sidtab {
32int sidtab_init(struct sidtab *s); 32int sidtab_init(struct sidtab *s);
33int sidtab_insert(struct sidtab *s, u32 sid, struct context *context); 33int sidtab_insert(struct sidtab *s, u32 sid, struct context *context);
34struct context *sidtab_search(struct sidtab *s, u32 sid); 34struct context *sidtab_search(struct sidtab *s, u32 sid);
35struct context *sidtab_search_force(struct sidtab *s, u32 sid);
35 36
36int sidtab_map(struct sidtab *s, 37int sidtab_map(struct sidtab *s,
37 int (*apply) (u32 sid, 38 int (*apply) (u32 sid,
@@ -39,12 +40,6 @@ int sidtab_map(struct sidtab *s,
39 void *args), 40 void *args),
40 void *args); 41 void *args);
41 42
42void sidtab_map_remove_on_error(struct sidtab *s,
43 int (*apply) (u32 sid,
44 struct context *context,
45 void *args),
46 void *args);
47
48int sidtab_context_to_sid(struct sidtab *s, 43int sidtab_context_to_sid(struct sidtab *s,
49 struct context *context, 44 struct context *context,
50 u32 *sid); 45 u32 *sid);
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index 4a09293efa00..ee5a51cbc5eb 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -95,11 +95,12 @@ struct inode_smack *new_inode_smack(char *smack)
95 * 95 *
96 * Do the capability checks, and require read and write. 96 * Do the capability checks, and require read and write.
97 */ 97 */
98static int smack_ptrace(struct task_struct *ptp, struct task_struct *ctp) 98static int smack_ptrace(struct task_struct *ptp, struct task_struct *ctp,
99 unsigned int mode)
99{ 100{
100 int rc; 101 int rc;
101 102
102 rc = cap_ptrace(ptp, ctp); 103 rc = cap_ptrace(ptp, ctp, mode);
103 if (rc != 0) 104 if (rc != 0)
104 return rc; 105 return rc;
105 106
@@ -1821,27 +1822,6 @@ static void smack_ipc_getsecid(struct kern_ipc_perm *ipp, u32 *secid)
1821 *secid = smack_to_secid(smack); 1822 *secid = smack_to_secid(smack);
1822} 1823}
1823 1824
1824/* module stacking operations */
1825
1826/**
1827 * smack_register_security - stack capability module
1828 * @name: module name
1829 * @ops: module operations - ignored
1830 *
1831 * Allow the capability module to register.
1832 */
1833static int smack_register_security(const char *name,
1834 struct security_operations *ops)
1835{
1836 if (strcmp(name, "capability") != 0)
1837 return -EINVAL;
1838
1839 printk(KERN_INFO "%s: Registering secondary module %s\n",
1840 __func__, name);
1841
1842 return 0;
1843}
1844
1845/** 1825/**
1846 * smack_d_instantiate - Make sure the blob is correct on an inode 1826 * smack_d_instantiate - Make sure the blob is correct on an inode
1847 * @opt_dentry: unused 1827 * @opt_dentry: unused
@@ -2672,8 +2652,6 @@ struct security_operations smack_ops = {
2672 .netlink_send = cap_netlink_send, 2652 .netlink_send = cap_netlink_send,
2673 .netlink_recv = cap_netlink_recv, 2653 .netlink_recv = cap_netlink_recv,
2674 2654
2675 .register_security = smack_register_security,
2676
2677 .d_instantiate = smack_d_instantiate, 2655 .d_instantiate = smack_d_instantiate,
2678 2656
2679 .getprocattr = smack_getprocattr, 2657 .getprocattr = smack_getprocattr,
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-14 19:52:23 -0500