2 * AppArmor security module
4 * This file contains AppArmor LSM hooks.
6 * Copyright (C) 1998-2008 Novell/SUSE
7 * Copyright 2009-2010 Canonical Ltd.
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License as
11 * published by the Free Software Foundation, version 2 of the
15 #include <linux/security.h>
16 #include <linux/moduleparam.h>
18 #include <linux/mman.h>
19 #include <linux/mount.h>
20 #include <linux/namei.h>
21 #include <linux/ptrace.h>
22 #include <linux/ctype.h>
23 #include <linux/sysctl.h>
24 #include <linux/audit.h>
27 #include "include/apparmor.h"
28 #include "include/apparmorfs.h"
29 #include "include/audit.h"
30 #include "include/capability.h"
31 #include "include/context.h"
32 #include "include/file.h"
33 #include "include/ipc.h"
34 #include "include/path.h"
35 #include "include/policy.h"
36 #include "include/procattr.h"
38 /* Flag indicating whether initialization completed */
39 int apparmor_initialized __initdata
;
46 * free the associated aa_task_cxt and put its profiles
48 static void apparmor_cred_free(struct cred
*cred
)
50 aa_free_task_context(cred
->security
);
51 cred
->security
= NULL
;
55 * allocate the apparmor part of blank credentials
57 static int apparmor_cred_alloc_blank(struct cred
*cred
, gfp_t gfp
)
59 /* freed by apparmor_cred_free */
60 struct aa_task_cxt
*cxt
= aa_alloc_task_context(gfp
);
69 * prepare new aa_task_cxt for modification by prepare_cred block
71 static int apparmor_cred_prepare(struct cred
*new, const struct cred
*old
,
74 /* freed by apparmor_cred_free */
75 struct aa_task_cxt
*cxt
= aa_alloc_task_context(gfp
);
79 aa_dup_task_context(cxt
, old
->security
);
85 * transfer the apparmor data to a blank set of creds
87 static void apparmor_cred_transfer(struct cred
*new, const struct cred
*old
)
89 const struct aa_task_cxt
*old_cxt
= old
->security
;
90 struct aa_task_cxt
*new_cxt
= new->security
;
92 aa_dup_task_context(new_cxt
, old_cxt
);
95 static int apparmor_ptrace_access_check(struct task_struct
*child
,
98 int error
= cap_ptrace_access_check(child
, mode
);
102 return aa_ptrace(current
, child
, mode
);
105 static int apparmor_ptrace_traceme(struct task_struct
*parent
)
107 int error
= cap_ptrace_traceme(parent
);
111 return aa_ptrace(parent
, current
, PTRACE_MODE_ATTACH
);
114 /* Derived from security/commoncap.c:cap_capget */
115 static int apparmor_capget(struct task_struct
*target
, kernel_cap_t
*effective
,
116 kernel_cap_t
*inheritable
, kernel_cap_t
*permitted
)
118 struct aa_profile
*profile
;
119 const struct cred
*cred
;
122 cred
= __task_cred(target
);
123 profile
= aa_cred_profile(cred
);
125 *effective
= cred
->cap_effective
;
126 *inheritable
= cred
->cap_inheritable
;
127 *permitted
= cred
->cap_permitted
;
129 if (!unconfined(profile
)) {
130 *effective
= cap_intersect(*effective
, profile
->caps
.allow
);
131 *permitted
= cap_intersect(*permitted
, profile
->caps
.allow
);
138 static int apparmor_capable(struct task_struct
*task
, const struct cred
*cred
,
141 struct aa_profile
*profile
;
142 /* cap_capable returns 0 on success, else -EPERM */
143 int error
= cap_capable(task
, cred
, cap
, audit
);
145 profile
= aa_cred_profile(cred
);
146 if (!unconfined(profile
))
147 error
= aa_capable(task
, profile
, cap
, audit
);
153 * common_perm - basic common permission check wrapper fn for paths
154 * @op: operation being checked
155 * @path: path to check permission of (NOT NULL)
156 * @mask: requested permissions mask
157 * @cond: conditional info for the permission request (NOT NULL)
159 * Returns: %0 else error code if error or permission denied
161 static int common_perm(int op
, struct path
*path
, u32 mask
,
162 struct path_cond
*cond
)
164 struct aa_profile
*profile
;
167 profile
= __aa_current_profile();
168 if (!unconfined(profile
))
169 error
= aa_path_perm(op
, profile
, path
, 0, mask
, cond
);
175 * common_perm_dir_dentry - common permission wrapper when path is dir, dentry
176 * @op: operation being checked
177 * @dir: directory of the dentry (NOT NULL)
178 * @dentry: dentry to check (NOT NULL)
179 * @mask: requested permissions mask
180 * @cond: conditional info for the permission request (NOT NULL)
182 * Returns: %0 else error code if error or permission denied
184 static int common_perm_dir_dentry(int op
, struct path
*dir
,
185 struct dentry
*dentry
, u32 mask
,
186 struct path_cond
*cond
)
188 struct path path
= { dir
->mnt
, dentry
};
190 return common_perm(op
, &path
, mask
, cond
);
194 * common_perm_mnt_dentry - common permission wrapper when mnt, dentry
195 * @op: operation being checked
196 * @mnt: mount point of dentry (NOT NULL)
197 * @dentry: dentry to check (NOT NULL)
198 * @mask: requested permissions mask
200 * Returns: %0 else error code if error or permission denied
202 static int common_perm_mnt_dentry(int op
, struct vfsmount
*mnt
,
203 struct dentry
*dentry
, u32 mask
)
205 struct path path
= { mnt
, dentry
};
206 struct path_cond cond
= { dentry
->d_inode
->i_uid
,
207 dentry
->d_inode
->i_mode
210 return common_perm(op
, &path
, mask
, &cond
);
214 * common_perm_rm - common permission wrapper for operations doing rm
215 * @op: operation being checked
216 * @dir: directory that the dentry is in (NOT NULL)
217 * @dentry: dentry being rm'd (NOT NULL)
218 * @mask: requested permission mask
220 * Returns: %0 else error code if error or permission denied
222 static int common_perm_rm(int op
, struct path
*dir
,
223 struct dentry
*dentry
, u32 mask
)
225 struct inode
*inode
= dentry
->d_inode
;
226 struct path_cond cond
= { };
228 if (!inode
|| !dir
->mnt
|| !mediated_filesystem(inode
))
231 cond
.uid
= inode
->i_uid
;
232 cond
.mode
= inode
->i_mode
;
234 return common_perm_dir_dentry(op
, dir
, dentry
, mask
, &cond
);
238 * common_perm_create - common permission wrapper for operations doing create
239 * @op: operation being checked
240 * @dir: directory that dentry will be created in (NOT NULL)
241 * @dentry: dentry to create (NOT NULL)
242 * @mask: request permission mask
243 * @mode: created file mode
245 * Returns: %0 else error code if error or permission denied
247 static int common_perm_create(int op
, struct path
*dir
, struct dentry
*dentry
,
248 u32 mask
, umode_t mode
)
250 struct path_cond cond
= { current_fsuid(), mode
};
252 if (!dir
->mnt
|| !mediated_filesystem(dir
->dentry
->d_inode
))
255 return common_perm_dir_dentry(op
, dir
, dentry
, mask
, &cond
);
258 static int apparmor_path_unlink(struct path
*dir
, struct dentry
*dentry
)
260 return common_perm_rm(OP_UNLINK
, dir
, dentry
, AA_MAY_DELETE
);
263 static int apparmor_path_mkdir(struct path
*dir
, struct dentry
*dentry
,
266 return common_perm_create(OP_MKDIR
, dir
, dentry
, AA_MAY_CREATE
,
270 static int apparmor_path_rmdir(struct path
*dir
, struct dentry
*dentry
)
272 return common_perm_rm(OP_RMDIR
, dir
, dentry
, AA_MAY_DELETE
);
275 static int apparmor_path_mknod(struct path
*dir
, struct dentry
*dentry
,
276 int mode
, unsigned int dev
)
278 return common_perm_create(OP_MKNOD
, dir
, dentry
, AA_MAY_CREATE
, mode
);
281 static int apparmor_path_truncate(struct path
*path
)
283 struct path_cond cond
= { path
->dentry
->d_inode
->i_uid
,
284 path
->dentry
->d_inode
->i_mode
287 if (!path
->mnt
|| !mediated_filesystem(path
->dentry
->d_inode
))
290 return common_perm(OP_TRUNC
, path
, MAY_WRITE
| AA_MAY_META_WRITE
,
294 static int apparmor_path_symlink(struct path
*dir
, struct dentry
*dentry
,
295 const char *old_name
)
297 return common_perm_create(OP_SYMLINK
, dir
, dentry
, AA_MAY_CREATE
,
301 static int apparmor_path_link(struct dentry
*old_dentry
, struct path
*new_dir
,
302 struct dentry
*new_dentry
)
304 struct aa_profile
*profile
;
307 if (!mediated_filesystem(old_dentry
->d_inode
))
310 profile
= aa_current_profile();
311 if (!unconfined(profile
))
312 error
= aa_path_link(profile
, old_dentry
, new_dir
, new_dentry
);
316 static int apparmor_path_rename(struct path
*old_dir
, struct dentry
*old_dentry
,
317 struct path
*new_dir
, struct dentry
*new_dentry
)
319 struct aa_profile
*profile
;
322 if (!mediated_filesystem(old_dentry
->d_inode
))
325 profile
= aa_current_profile();
326 if (!unconfined(profile
)) {
327 struct path old_path
= { old_dir
->mnt
, old_dentry
};
328 struct path new_path
= { new_dir
->mnt
, new_dentry
};
329 struct path_cond cond
= { old_dentry
->d_inode
->i_uid
,
330 old_dentry
->d_inode
->i_mode
333 error
= aa_path_perm(OP_RENAME_SRC
, profile
, &old_path
, 0,
334 MAY_READ
| AA_MAY_META_READ
| MAY_WRITE
|
335 AA_MAY_META_WRITE
| AA_MAY_DELETE
,
338 error
= aa_path_perm(OP_RENAME_DEST
, profile
, &new_path
,
339 0, MAY_WRITE
| AA_MAY_META_WRITE
|
340 AA_MAY_CREATE
, &cond
);
346 static int apparmor_path_chmod(struct dentry
*dentry
, struct vfsmount
*mnt
,
349 if (!mediated_filesystem(dentry
->d_inode
))
352 return common_perm_mnt_dentry(OP_CHMOD
, mnt
, dentry
, AA_MAY_CHMOD
);
355 static int apparmor_path_chown(struct path
*path
, uid_t uid
, gid_t gid
)
357 struct path_cond cond
= { path
->dentry
->d_inode
->i_uid
,
358 path
->dentry
->d_inode
->i_mode
361 if (!mediated_filesystem(path
->dentry
->d_inode
))
364 return common_perm(OP_CHOWN
, path
, AA_MAY_CHOWN
, &cond
);
367 static int apparmor_inode_getattr(struct vfsmount
*mnt
, struct dentry
*dentry
)
369 if (!mediated_filesystem(dentry
->d_inode
))
372 return common_perm_mnt_dentry(OP_GETATTR
, mnt
, dentry
,
376 static int apparmor_dentry_open(struct file
*file
, const struct cred
*cred
)
378 struct aa_file_cxt
*fcxt
= file
->f_security
;
379 struct aa_profile
*profile
;
382 if (!mediated_filesystem(file
->f_path
.dentry
->d_inode
))
385 /* If in exec, permission is handled by bprm hooks.
386 * Cache permissions granted by the previous exec check, with
387 * implicit read and executable mmap which are required to
388 * actually execute the image.
390 if (current
->in_execve
) {
391 fcxt
->allow
= MAY_EXEC
| MAY_READ
| AA_EXEC_MMAP
;
395 profile
= aa_cred_profile(cred
);
396 if (!unconfined(profile
)) {
397 struct inode
*inode
= file
->f_path
.dentry
->d_inode
;
398 struct path_cond cond
= { inode
->i_uid
, inode
->i_mode
};
400 error
= aa_path_perm(OP_OPEN
, profile
, &file
->f_path
, 0,
401 aa_map_file_to_perms(file
), &cond
);
402 /* todo cache full allowed permissions set and state */
403 fcxt
->allow
= aa_map_file_to_perms(file
);
409 static int apparmor_file_alloc_security(struct file
*file
)
411 /* freed by apparmor_file_free_security */
412 file
->f_security
= aa_alloc_file_context(GFP_KERNEL
);
413 if (!file
->f_security
)
419 static void apparmor_file_free_security(struct file
*file
)
421 struct aa_file_cxt
*cxt
= file
->f_security
;
423 aa_free_file_context(cxt
);
426 static int common_file_perm(int op
, struct file
*file
, u32 mask
)
428 struct aa_file_cxt
*fcxt
= file
->f_security
;
429 struct aa_profile
*profile
, *fprofile
= aa_cred_profile(file
->f_cred
);
434 if (!file
->f_path
.mnt
||
435 !mediated_filesystem(file
->f_path
.dentry
->d_inode
))
438 profile
= __aa_current_profile();
440 /* revalidate access, if task is unconfined, or the cached cred
441 * doesn't match or if the request is for more permissions than
444 * Note: the test for !unconfined(fprofile) is to handle file
445 * delegation from unconfined tasks
447 if (!unconfined(profile
) && !unconfined(fprofile
) &&
448 ((fprofile
!= profile
) || (mask
& ~fcxt
->allow
)))
449 error
= aa_file_perm(op
, profile
, file
, mask
);
454 static int apparmor_file_permission(struct file
*file
, int mask
)
456 return common_file_perm(OP_FPERM
, file
, mask
);
459 static int apparmor_file_lock(struct file
*file
, unsigned int cmd
)
461 u32 mask
= AA_MAY_LOCK
;
466 return common_file_perm(OP_FLOCK
, file
, mask
);
469 static int common_mmap(int op
, struct file
*file
, unsigned long prot
,
472 struct dentry
*dentry
;
475 if (!file
|| !file
->f_security
)
478 if (prot
& PROT_READ
)
481 * Private mappings don't require write perms since they don't
482 * write back to the files
484 if ((prot
& PROT_WRITE
) && !(flags
& MAP_PRIVATE
))
486 if (prot
& PROT_EXEC
)
487 mask
|= AA_EXEC_MMAP
;
489 dentry
= file
->f_path
.dentry
;
490 return common_file_perm(op
, file
, mask
);
493 static int apparmor_file_mmap(struct file
*file
, unsigned long reqprot
,
494 unsigned long prot
, unsigned long flags
,
495 unsigned long addr
, unsigned long addr_only
)
500 rc
= cap_file_mmap(file
, reqprot
, prot
, flags
, addr
, addr_only
);
504 return common_mmap(OP_FMMAP
, file
, prot
, flags
);
507 static int apparmor_file_mprotect(struct vm_area_struct
*vma
,
508 unsigned long reqprot
, unsigned long prot
)
510 return common_mmap(OP_FMPROT
, vma
->vm_file
, prot
,
511 !(vma
->vm_flags
& VM_SHARED
) ? MAP_PRIVATE
: 0);
514 static int apparmor_getprocattr(struct task_struct
*task
, char *name
,
518 struct aa_profile
*profile
;
520 const struct cred
*cred
= get_task_cred(task
);
521 struct aa_task_cxt
*cxt
= cred
->security
;
522 profile
= aa_cred_profile(cred
);
524 if (strcmp(name
, "current") == 0)
525 error
= aa_getprocattr(aa_newest_version(cxt
->profile
),
527 else if (strcmp(name
, "prev") == 0 && cxt
->previous
)
528 error
= aa_getprocattr(aa_newest_version(cxt
->previous
),
530 else if (strcmp(name
, "exec") == 0 && cxt
->onexec
)
531 error
= aa_getprocattr(aa_newest_version(cxt
->onexec
),
541 static int apparmor_setprocattr(struct task_struct
*task
, char *name
,
542 void *value
, size_t size
)
544 char *command
, *args
= value
;
550 /* args points to a PAGE_SIZE buffer, AppArmor requires that
551 * the buffer must be null terminated or have size <= PAGE_SIZE -1
552 * so that AppArmor can null terminate them
554 if (args
[size
- 1] != '\0') {
555 if (size
== PAGE_SIZE
)
560 /* task can only write its own attributes */
566 command
= strsep(&args
, " ");
569 args
= skip_spaces(args
);
573 arg_size
= size
- (args
- (char *) value
);
574 if (strcmp(name
, "current") == 0) {
575 if (strcmp(command
, "changehat") == 0) {
576 error
= aa_setprocattr_changehat(args
, arg_size
,
578 } else if (strcmp(command
, "permhat") == 0) {
579 error
= aa_setprocattr_changehat(args
, arg_size
,
581 } else if (strcmp(command
, "changeprofile") == 0) {
582 error
= aa_setprocattr_changeprofile(args
, !AA_ONEXEC
,
584 } else if (strcmp(command
, "permprofile") == 0) {
585 error
= aa_setprocattr_changeprofile(args
, !AA_ONEXEC
,
587 } else if (strcmp(command
, "permipc") == 0) {
588 error
= aa_setprocattr_permipc(args
);
590 struct common_audit_data sa
;
591 COMMON_AUDIT_DATA_INIT(&sa
, NONE
);
592 sa
.aad
.op
= OP_SETPROCATTR
;
594 sa
.aad
.error
= -EINVAL
;
595 return aa_audit(AUDIT_APPARMOR_DENIED
, NULL
, GFP_KERNEL
,
598 } else if (strcmp(name
, "exec") == 0) {
599 error
= aa_setprocattr_changeprofile(args
, AA_ONEXEC
,
602 /* only support the "current" and "exec" process attributes */
610 static int apparmor_task_setrlimit(unsigned int resource
,
611 struct rlimit
*new_rlim
)
613 struct aa_profile
*profile
= aa_current_profile();
616 if (!unconfined(profile
))
617 error
= aa_task_setrlimit(profile
, resource
, new_rlim
);
622 static struct security_operations apparmor_ops
= {
625 .ptrace_access_check
= apparmor_ptrace_access_check
,
626 .ptrace_traceme
= apparmor_ptrace_traceme
,
627 .capget
= apparmor_capget
,
628 .capable
= apparmor_capable
,
630 .path_link
= apparmor_path_link
,
631 .path_unlink
= apparmor_path_unlink
,
632 .path_symlink
= apparmor_path_symlink
,
633 .path_mkdir
= apparmor_path_mkdir
,
634 .path_rmdir
= apparmor_path_rmdir
,
635 .path_mknod
= apparmor_path_mknod
,
636 .path_rename
= apparmor_path_rename
,
637 .path_chmod
= apparmor_path_chmod
,
638 .path_chown
= apparmor_path_chown
,
639 .path_truncate
= apparmor_path_truncate
,
640 .dentry_open
= apparmor_dentry_open
,
641 .inode_getattr
= apparmor_inode_getattr
,
643 .file_permission
= apparmor_file_permission
,
644 .file_alloc_security
= apparmor_file_alloc_security
,
645 .file_free_security
= apparmor_file_free_security
,
646 .file_mmap
= apparmor_file_mmap
,
647 .file_mprotect
= apparmor_file_mprotect
,
648 .file_lock
= apparmor_file_lock
,
650 .getprocattr
= apparmor_getprocattr
,
651 .setprocattr
= apparmor_setprocattr
,
653 .cred_alloc_blank
= apparmor_cred_alloc_blank
,
654 .cred_free
= apparmor_cred_free
,
655 .cred_prepare
= apparmor_cred_prepare
,
656 .cred_transfer
= apparmor_cred_transfer
,
658 .bprm_set_creds
= apparmor_bprm_set_creds
,
659 .bprm_committing_creds
= apparmor_bprm_committing_creds
,
660 .bprm_committed_creds
= apparmor_bprm_committed_creds
,
661 .bprm_secureexec
= apparmor_bprm_secureexec
,
663 .task_setrlimit
= apparmor_task_setrlimit
,
667 * AppArmor sysfs module parameters
670 static int param_set_aabool(const char *val
, struct kernel_param
*kp
);
671 static int param_get_aabool(char *buffer
, struct kernel_param
*kp
);
672 #define param_check_aabool(name, p) __param_check(name, p, int)
674 static int param_set_aauint(const char *val
, struct kernel_param
*kp
);
675 static int param_get_aauint(char *buffer
, struct kernel_param
*kp
);
676 #define param_check_aauint(name, p) __param_check(name, p, int)
678 static int param_set_aalockpolicy(const char *val
, struct kernel_param
*kp
);
679 static int param_get_aalockpolicy(char *buffer
, struct kernel_param
*kp
);
680 #define param_check_aalockpolicy(name, p) __param_check(name, p, int)
682 static int param_set_audit(const char *val
, struct kernel_param
*kp
);
683 static int param_get_audit(char *buffer
, struct kernel_param
*kp
);
684 #define param_check_audit(name, p) __param_check(name, p, int)
686 static int param_set_mode(const char *val
, struct kernel_param
*kp
);
687 static int param_get_mode(char *buffer
, struct kernel_param
*kp
);
688 #define param_check_mode(name, p) __param_check(name, p, int)
690 /* Flag values, also controllable via /sys/module/apparmor/parameters
691 * We define special types as we want to do additional mediation.
694 /* AppArmor global enforcement switch - complain, enforce, kill */
695 enum profile_mode aa_g_profile_mode
= APPARMOR_ENFORCE
;
696 module_param_call(mode
, param_set_mode
, param_get_mode
,
697 &aa_g_profile_mode
, S_IRUSR
| S_IWUSR
);
701 module_param_named(debug
, aa_g_debug
, aabool
, S_IRUSR
| S_IWUSR
);
704 enum audit_mode aa_g_audit
;
705 module_param_call(audit
, param_set_audit
, param_get_audit
,
706 &aa_g_audit
, S_IRUSR
| S_IWUSR
);
708 /* Determines if audit header is included in audited messages. This
709 * provides more context if the audit daemon is not running
711 int aa_g_audit_header
= 1;
712 module_param_named(audit_header
, aa_g_audit_header
, aabool
,
715 /* lock out loading/removal of policy
716 * TODO: add in at boot loading of policy, which is the only way to
717 * load policy, if lock_policy is set
719 int aa_g_lock_policy
;
720 module_param_named(lock_policy
, aa_g_lock_policy
, aalockpolicy
,
723 /* Syscall logging mode */
725 module_param_named(logsyscall
, aa_g_logsyscall
, aabool
, S_IRUSR
| S_IWUSR
);
727 /* Maximum pathname length before accesses will start getting rejected */
728 unsigned int aa_g_path_max
= 2 * PATH_MAX
;
729 module_param_named(path_max
, aa_g_path_max
, aauint
, S_IRUSR
| S_IWUSR
);
731 /* Determines how paranoid loading of policy is and how much verification
732 * on the loaded policy is done.
734 int aa_g_paranoid_load
= 1;
735 module_param_named(paranoid_load
, aa_g_paranoid_load
, aabool
,
738 /* Boot time disable flag */
739 static unsigned int apparmor_enabled
= CONFIG_SECURITY_APPARMOR_BOOTPARAM_VALUE
;
740 module_param_named(enabled
, apparmor_enabled
, aabool
, S_IRUSR
);
742 static int __init
apparmor_enabled_setup(char *str
)
744 unsigned long enabled
;
745 int error
= strict_strtoul(str
, 0, &enabled
);
747 apparmor_enabled
= enabled
? 1 : 0;
751 __setup("apparmor=", apparmor_enabled_setup
);
753 /* set global flag turning off the ability to load policy */
754 static int param_set_aalockpolicy(const char *val
, struct kernel_param
*kp
)
756 if (!capable(CAP_MAC_ADMIN
))
758 if (aa_g_lock_policy
)
760 return param_set_bool(val
, kp
);
763 static int param_get_aalockpolicy(char *buffer
, struct kernel_param
*kp
)
765 if (!capable(CAP_MAC_ADMIN
))
767 return param_get_bool(buffer
, kp
);
770 static int param_set_aabool(const char *val
, struct kernel_param
*kp
)
772 if (!capable(CAP_MAC_ADMIN
))
774 return param_set_bool(val
, kp
);
777 static int param_get_aabool(char *buffer
, struct kernel_param
*kp
)
779 if (!capable(CAP_MAC_ADMIN
))
781 return param_get_bool(buffer
, kp
);
784 static int param_set_aauint(const char *val
, struct kernel_param
*kp
)
786 if (!capable(CAP_MAC_ADMIN
))
788 return param_set_uint(val
, kp
);
791 static int param_get_aauint(char *buffer
, struct kernel_param
*kp
)
793 if (!capable(CAP_MAC_ADMIN
))
795 return param_get_uint(buffer
, kp
);
798 static int param_get_audit(char *buffer
, struct kernel_param
*kp
)
800 if (!capable(CAP_MAC_ADMIN
))
803 if (!apparmor_enabled
)
806 return sprintf(buffer
, "%s", audit_mode_names
[aa_g_audit
]);
809 static int param_set_audit(const char *val
, struct kernel_param
*kp
)
812 if (!capable(CAP_MAC_ADMIN
))
815 if (!apparmor_enabled
)
821 for (i
= 0; i
< AUDIT_MAX_INDEX
; i
++) {
822 if (strcmp(val
, audit_mode_names
[i
]) == 0) {
831 static int param_get_mode(char *buffer
, struct kernel_param
*kp
)
833 if (!capable(CAP_MAC_ADMIN
))
836 if (!apparmor_enabled
)
839 return sprintf(buffer
, "%s", profile_mode_names
[aa_g_profile_mode
]);
842 static int param_set_mode(const char *val
, struct kernel_param
*kp
)
845 if (!capable(CAP_MAC_ADMIN
))
848 if (!apparmor_enabled
)
854 for (i
= 0; i
< APPARMOR_NAMES_MAX_INDEX
; i
++) {
855 if (strcmp(val
, profile_mode_names
[i
]) == 0) {
856 aa_g_profile_mode
= i
;
865 * AppArmor init functions
869 * set_init_cxt - set a task context and profile on the first task.
871 * TODO: allow setting an alternate profile than unconfined
873 static int __init
set_init_cxt(void)
875 struct cred
*cred
= (struct cred
*)current
->real_cred
;
876 struct aa_task_cxt
*cxt
;
878 cxt
= aa_alloc_task_context(GFP_KERNEL
);
882 cxt
->profile
= aa_get_profile(root_ns
->unconfined
);
883 cred
->security
= cxt
;
888 static int __init
apparmor_init(void)
892 if (!apparmor_enabled
|| !security_module_enable(&apparmor_ops
)) {
893 aa_info_message("AppArmor disabled by boot time parameter");
894 apparmor_enabled
= 0;
898 error
= aa_alloc_root_ns();
900 AA_ERROR("Unable to allocate default profile namespace\n");
904 error
= set_init_cxt();
906 AA_ERROR("Failed to set context on init task\n");
907 goto register_security_out
;
910 error
= register_security(&apparmor_ops
);
912 AA_ERROR("Unable to register AppArmor\n");
913 goto register_security_out
;
916 /* Report that AppArmor successfully initialized */
917 apparmor_initialized
= 1;
918 if (aa_g_profile_mode
== APPARMOR_COMPLAIN
)
919 aa_info_message("AppArmor initialized: complain mode enabled");
920 else if (aa_g_profile_mode
== APPARMOR_KILL
)
921 aa_info_message("AppArmor initialized: kill mode enabled");
923 aa_info_message("AppArmor initialized");
927 register_security_out
:
933 apparmor_enabled
= 0;
938 security_initcall(apparmor_init
);