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>
25 #include <linux/user_namespace.h>
28 #include "include/apparmor.h"
29 #include "include/apparmorfs.h"
30 #include "include/audit.h"
31 #include "include/capability.h"
32 #include "include/context.h"
33 #include "include/file.h"
34 #include "include/ipc.h"
35 #include "include/path.h"
36 #include "include/policy.h"
37 #include "include/procattr.h"
39 /* Flag indicating whether initialization completed */
40 int apparmor_initialized __initdata
;
47 * free the associated aa_task_cxt and put its profiles
49 static void apparmor_cred_free(struct cred
*cred
)
51 aa_free_task_context(cred
->security
);
52 cred
->security
= NULL
;
56 * allocate the apparmor part of blank credentials
58 static int apparmor_cred_alloc_blank(struct cred
*cred
, gfp_t gfp
)
60 /* freed by apparmor_cred_free */
61 struct aa_task_cxt
*cxt
= aa_alloc_task_context(gfp
);
70 * prepare new aa_task_cxt for modification by prepare_cred block
72 static int apparmor_cred_prepare(struct cred
*new, const struct cred
*old
,
75 /* freed by apparmor_cred_free */
76 struct aa_task_cxt
*cxt
= aa_alloc_task_context(gfp
);
80 aa_dup_task_context(cxt
, old
->security
);
86 * transfer the apparmor data to a blank set of creds
88 static void apparmor_cred_transfer(struct cred
*new, const struct cred
*old
)
90 const struct aa_task_cxt
*old_cxt
= old
->security
;
91 struct aa_task_cxt
*new_cxt
= new->security
;
93 aa_dup_task_context(new_cxt
, old_cxt
);
96 static int apparmor_ptrace_access_check(struct task_struct
*child
,
99 int error
= cap_ptrace_access_check(child
, mode
);
103 return aa_ptrace(current
, child
, mode
);
106 static int apparmor_ptrace_traceme(struct task_struct
*parent
)
108 int error
= cap_ptrace_traceme(parent
);
112 return aa_ptrace(parent
, current
, PTRACE_MODE_ATTACH
);
115 /* Derived from security/commoncap.c:cap_capget */
116 static int apparmor_capget(struct task_struct
*target
, kernel_cap_t
*effective
,
117 kernel_cap_t
*inheritable
, kernel_cap_t
*permitted
)
119 struct aa_profile
*profile
;
120 const struct cred
*cred
;
123 cred
= __task_cred(target
);
124 profile
= aa_cred_profile(cred
);
126 *effective
= cred
->cap_effective
;
127 *inheritable
= cred
->cap_inheritable
;
128 *permitted
= cred
->cap_permitted
;
130 if (!unconfined(profile
)) {
131 *effective
= cap_intersect(*effective
, profile
->caps
.allow
);
132 *permitted
= cap_intersect(*permitted
, profile
->caps
.allow
);
139 static int apparmor_capable(struct task_struct
*task
, const struct cred
*cred
,
140 struct user_namespace
*ns
, int cap
, int audit
)
142 struct aa_profile
*profile
;
143 /* cap_capable returns 0 on success, else -EPERM */
144 int error
= cap_capable(task
, cred
, ns
, cap
, audit
);
146 profile
= aa_cred_profile(cred
);
147 if (!unconfined(profile
))
148 error
= aa_capable(task
, profile
, cap
, audit
);
154 * common_perm - basic common permission check wrapper fn for paths
155 * @op: operation being checked
156 * @path: path to check permission of (NOT NULL)
157 * @mask: requested permissions mask
158 * @cond: conditional info for the permission request (NOT NULL)
160 * Returns: %0 else error code if error or permission denied
162 static int common_perm(int op
, struct path
*path
, u32 mask
,
163 struct path_cond
*cond
)
165 struct aa_profile
*profile
;
168 profile
= __aa_current_profile();
169 if (!unconfined(profile
))
170 error
= aa_path_perm(op
, profile
, path
, 0, mask
, cond
);
176 * common_perm_dir_dentry - common permission wrapper when path is dir, dentry
177 * @op: operation being checked
178 * @dir: directory of the dentry (NOT NULL)
179 * @dentry: dentry to check (NOT NULL)
180 * @mask: requested permissions mask
181 * @cond: conditional info for the permission request (NOT NULL)
183 * Returns: %0 else error code if error or permission denied
185 static int common_perm_dir_dentry(int op
, struct path
*dir
,
186 struct dentry
*dentry
, u32 mask
,
187 struct path_cond
*cond
)
189 struct path path
= { dir
->mnt
, dentry
};
191 return common_perm(op
, &path
, mask
, cond
);
195 * common_perm_mnt_dentry - common permission wrapper when mnt, dentry
196 * @op: operation being checked
197 * @mnt: mount point of dentry (NOT NULL)
198 * @dentry: dentry to check (NOT NULL)
199 * @mask: requested permissions mask
201 * Returns: %0 else error code if error or permission denied
203 static int common_perm_mnt_dentry(int op
, struct vfsmount
*mnt
,
204 struct dentry
*dentry
, u32 mask
)
206 struct path path
= { mnt
, dentry
};
207 struct path_cond cond
= { dentry
->d_inode
->i_uid
,
208 dentry
->d_inode
->i_mode
211 return common_perm(op
, &path
, mask
, &cond
);
215 * common_perm_rm - common permission wrapper for operations doing rm
216 * @op: operation being checked
217 * @dir: directory that the dentry is in (NOT NULL)
218 * @dentry: dentry being rm'd (NOT NULL)
219 * @mask: requested permission mask
221 * Returns: %0 else error code if error or permission denied
223 static int common_perm_rm(int op
, struct path
*dir
,
224 struct dentry
*dentry
, u32 mask
)
226 struct inode
*inode
= dentry
->d_inode
;
227 struct path_cond cond
= { };
229 if (!inode
|| !dir
->mnt
|| !mediated_filesystem(inode
))
232 cond
.uid
= inode
->i_uid
;
233 cond
.mode
= inode
->i_mode
;
235 return common_perm_dir_dentry(op
, dir
, dentry
, mask
, &cond
);
239 * common_perm_create - common permission wrapper for operations doing create
240 * @op: operation being checked
241 * @dir: directory that dentry will be created in (NOT NULL)
242 * @dentry: dentry to create (NOT NULL)
243 * @mask: request permission mask
244 * @mode: created file mode
246 * Returns: %0 else error code if error or permission denied
248 static int common_perm_create(int op
, struct path
*dir
, struct dentry
*dentry
,
249 u32 mask
, umode_t mode
)
251 struct path_cond cond
= { current_fsuid(), mode
};
253 if (!dir
->mnt
|| !mediated_filesystem(dir
->dentry
->d_inode
))
256 return common_perm_dir_dentry(op
, dir
, dentry
, mask
, &cond
);
259 static int apparmor_path_unlink(struct path
*dir
, struct dentry
*dentry
)
261 return common_perm_rm(OP_UNLINK
, dir
, dentry
, AA_MAY_DELETE
);
264 static int apparmor_path_mkdir(struct path
*dir
, struct dentry
*dentry
,
267 return common_perm_create(OP_MKDIR
, dir
, dentry
, AA_MAY_CREATE
,
271 static int apparmor_path_rmdir(struct path
*dir
, struct dentry
*dentry
)
273 return common_perm_rm(OP_RMDIR
, dir
, dentry
, AA_MAY_DELETE
);
276 static int apparmor_path_mknod(struct path
*dir
, struct dentry
*dentry
,
277 int mode
, unsigned int dev
)
279 return common_perm_create(OP_MKNOD
, dir
, dentry
, AA_MAY_CREATE
, mode
);
282 static int apparmor_path_truncate(struct path
*path
)
284 struct path_cond cond
= { path
->dentry
->d_inode
->i_uid
,
285 path
->dentry
->d_inode
->i_mode
288 if (!path
->mnt
|| !mediated_filesystem(path
->dentry
->d_inode
))
291 return common_perm(OP_TRUNC
, path
, MAY_WRITE
| AA_MAY_META_WRITE
,
295 static int apparmor_path_symlink(struct path
*dir
, struct dentry
*dentry
,
296 const char *old_name
)
298 return common_perm_create(OP_SYMLINK
, dir
, dentry
, AA_MAY_CREATE
,
302 static int apparmor_path_link(struct dentry
*old_dentry
, struct path
*new_dir
,
303 struct dentry
*new_dentry
)
305 struct aa_profile
*profile
;
308 if (!mediated_filesystem(old_dentry
->d_inode
))
311 profile
= aa_current_profile();
312 if (!unconfined(profile
))
313 error
= aa_path_link(profile
, old_dentry
, new_dir
, new_dentry
);
317 static int apparmor_path_rename(struct path
*old_dir
, struct dentry
*old_dentry
,
318 struct path
*new_dir
, struct dentry
*new_dentry
)
320 struct aa_profile
*profile
;
323 if (!mediated_filesystem(old_dentry
->d_inode
))
326 profile
= aa_current_profile();
327 if (!unconfined(profile
)) {
328 struct path old_path
= { old_dir
->mnt
, old_dentry
};
329 struct path new_path
= { new_dir
->mnt
, new_dentry
};
330 struct path_cond cond
= { old_dentry
->d_inode
->i_uid
,
331 old_dentry
->d_inode
->i_mode
334 error
= aa_path_perm(OP_RENAME_SRC
, profile
, &old_path
, 0,
335 MAY_READ
| AA_MAY_META_READ
| MAY_WRITE
|
336 AA_MAY_META_WRITE
| AA_MAY_DELETE
,
339 error
= aa_path_perm(OP_RENAME_DEST
, profile
, &new_path
,
340 0, MAY_WRITE
| AA_MAY_META_WRITE
|
341 AA_MAY_CREATE
, &cond
);
347 static int apparmor_path_chmod(struct dentry
*dentry
, struct vfsmount
*mnt
,
350 if (!mediated_filesystem(dentry
->d_inode
))
353 return common_perm_mnt_dentry(OP_CHMOD
, mnt
, dentry
, AA_MAY_CHMOD
);
356 static int apparmor_path_chown(struct path
*path
, uid_t uid
, gid_t gid
)
358 struct path_cond cond
= { path
->dentry
->d_inode
->i_uid
,
359 path
->dentry
->d_inode
->i_mode
362 if (!mediated_filesystem(path
->dentry
->d_inode
))
365 return common_perm(OP_CHOWN
, path
, AA_MAY_CHOWN
, &cond
);
368 static int apparmor_inode_getattr(struct vfsmount
*mnt
, struct dentry
*dentry
)
370 if (!mediated_filesystem(dentry
->d_inode
))
373 return common_perm_mnt_dentry(OP_GETATTR
, mnt
, dentry
,
377 static int apparmor_dentry_open(struct file
*file
, const struct cred
*cred
)
379 struct aa_file_cxt
*fcxt
= file
->f_security
;
380 struct aa_profile
*profile
;
383 if (!mediated_filesystem(file
->f_path
.dentry
->d_inode
))
386 /* If in exec, permission is handled by bprm hooks.
387 * Cache permissions granted by the previous exec check, with
388 * implicit read and executable mmap which are required to
389 * actually execute the image.
391 if (current
->in_execve
) {
392 fcxt
->allow
= MAY_EXEC
| MAY_READ
| AA_EXEC_MMAP
;
396 profile
= aa_cred_profile(cred
);
397 if (!unconfined(profile
)) {
398 struct inode
*inode
= file
->f_path
.dentry
->d_inode
;
399 struct path_cond cond
= { inode
->i_uid
, inode
->i_mode
};
401 error
= aa_path_perm(OP_OPEN
, profile
, &file
->f_path
, 0,
402 aa_map_file_to_perms(file
), &cond
);
403 /* todo cache full allowed permissions set and state */
404 fcxt
->allow
= aa_map_file_to_perms(file
);
410 static int apparmor_file_alloc_security(struct file
*file
)
412 /* freed by apparmor_file_free_security */
413 file
->f_security
= aa_alloc_file_context(GFP_KERNEL
);
414 if (!file
->f_security
)
420 static void apparmor_file_free_security(struct file
*file
)
422 struct aa_file_cxt
*cxt
= file
->f_security
;
424 aa_free_file_context(cxt
);
427 static int common_file_perm(int op
, struct file
*file
, u32 mask
)
429 struct aa_file_cxt
*fcxt
= file
->f_security
;
430 struct aa_profile
*profile
, *fprofile
= aa_cred_profile(file
->f_cred
);
435 if (!file
->f_path
.mnt
||
436 !mediated_filesystem(file
->f_path
.dentry
->d_inode
))
439 profile
= __aa_current_profile();
441 /* revalidate access, if task is unconfined, or the cached cred
442 * doesn't match or if the request is for more permissions than
445 * Note: the test for !unconfined(fprofile) is to handle file
446 * delegation from unconfined tasks
448 if (!unconfined(profile
) && !unconfined(fprofile
) &&
449 ((fprofile
!= profile
) || (mask
& ~fcxt
->allow
)))
450 error
= aa_file_perm(op
, profile
, file
, mask
);
455 static int apparmor_file_permission(struct file
*file
, int mask
)
457 return common_file_perm(OP_FPERM
, file
, mask
);
460 static int apparmor_file_lock(struct file
*file
, unsigned int cmd
)
462 u32 mask
= AA_MAY_LOCK
;
467 return common_file_perm(OP_FLOCK
, file
, mask
);
470 static int common_mmap(int op
, struct file
*file
, unsigned long prot
,
473 struct dentry
*dentry
;
476 if (!file
|| !file
->f_security
)
479 if (prot
& PROT_READ
)
482 * Private mappings don't require write perms since they don't
483 * write back to the files
485 if ((prot
& PROT_WRITE
) && !(flags
& MAP_PRIVATE
))
487 if (prot
& PROT_EXEC
)
488 mask
|= AA_EXEC_MMAP
;
490 dentry
= file
->f_path
.dentry
;
491 return common_file_perm(op
, file
, mask
);
494 static int apparmor_file_mmap(struct file
*file
, unsigned long reqprot
,
495 unsigned long prot
, unsigned long flags
,
496 unsigned long addr
, unsigned long addr_only
)
501 rc
= cap_file_mmap(file
, reqprot
, prot
, flags
, addr
, addr_only
);
505 return common_mmap(OP_FMMAP
, file
, prot
, flags
);
508 static int apparmor_file_mprotect(struct vm_area_struct
*vma
,
509 unsigned long reqprot
, unsigned long prot
)
511 return common_mmap(OP_FMPROT
, vma
->vm_file
, prot
,
512 !(vma
->vm_flags
& VM_SHARED
) ? MAP_PRIVATE
: 0);
515 static int apparmor_getprocattr(struct task_struct
*task
, char *name
,
519 struct aa_profile
*profile
;
521 const struct cred
*cred
= get_task_cred(task
);
522 struct aa_task_cxt
*cxt
= cred
->security
;
523 profile
= aa_cred_profile(cred
);
525 if (strcmp(name
, "current") == 0)
526 error
= aa_getprocattr(aa_newest_version(cxt
->profile
),
528 else if (strcmp(name
, "prev") == 0 && cxt
->previous
)
529 error
= aa_getprocattr(aa_newest_version(cxt
->previous
),
531 else if (strcmp(name
, "exec") == 0 && cxt
->onexec
)
532 error
= aa_getprocattr(aa_newest_version(cxt
->onexec
),
542 static int apparmor_setprocattr(struct task_struct
*task
, char *name
,
543 void *value
, size_t size
)
545 char *command
, *args
= value
;
551 /* args points to a PAGE_SIZE buffer, AppArmor requires that
552 * the buffer must be null terminated or have size <= PAGE_SIZE -1
553 * so that AppArmor can null terminate them
555 if (args
[size
- 1] != '\0') {
556 if (size
== PAGE_SIZE
)
561 /* task can only write its own attributes */
567 command
= strsep(&args
, " ");
570 args
= skip_spaces(args
);
574 arg_size
= size
- (args
- (char *) value
);
575 if (strcmp(name
, "current") == 0) {
576 if (strcmp(command
, "changehat") == 0) {
577 error
= aa_setprocattr_changehat(args
, arg_size
,
579 } else if (strcmp(command
, "permhat") == 0) {
580 error
= aa_setprocattr_changehat(args
, arg_size
,
582 } else if (strcmp(command
, "changeprofile") == 0) {
583 error
= aa_setprocattr_changeprofile(args
, !AA_ONEXEC
,
585 } else if (strcmp(command
, "permprofile") == 0) {
586 error
= aa_setprocattr_changeprofile(args
, !AA_ONEXEC
,
588 } else if (strcmp(command
, "permipc") == 0) {
589 error
= aa_setprocattr_permipc(args
);
591 struct common_audit_data sa
;
592 COMMON_AUDIT_DATA_INIT(&sa
, NONE
);
593 sa
.aad
.op
= OP_SETPROCATTR
;
595 sa
.aad
.error
= -EINVAL
;
596 return aa_audit(AUDIT_APPARMOR_DENIED
,
597 __aa_current_profile(), GFP_KERNEL
,
600 } else if (strcmp(name
, "exec") == 0) {
601 error
= aa_setprocattr_changeprofile(args
, AA_ONEXEC
,
604 /* only support the "current" and "exec" process attributes */
612 static int apparmor_task_setrlimit(struct task_struct
*task
,
613 unsigned int resource
, struct rlimit
*new_rlim
)
615 struct aa_profile
*profile
= __aa_current_profile();
618 if (!unconfined(profile
))
619 error
= aa_task_setrlimit(profile
, task
, resource
, new_rlim
);
624 static struct security_operations apparmor_ops
= {
627 .ptrace_access_check
= apparmor_ptrace_access_check
,
628 .ptrace_traceme
= apparmor_ptrace_traceme
,
629 .capget
= apparmor_capget
,
630 .capable
= apparmor_capable
,
632 .path_link
= apparmor_path_link
,
633 .path_unlink
= apparmor_path_unlink
,
634 .path_symlink
= apparmor_path_symlink
,
635 .path_mkdir
= apparmor_path_mkdir
,
636 .path_rmdir
= apparmor_path_rmdir
,
637 .path_mknod
= apparmor_path_mknod
,
638 .path_rename
= apparmor_path_rename
,
639 .path_chmod
= apparmor_path_chmod
,
640 .path_chown
= apparmor_path_chown
,
641 .path_truncate
= apparmor_path_truncate
,
642 .dentry_open
= apparmor_dentry_open
,
643 .inode_getattr
= apparmor_inode_getattr
,
645 .file_permission
= apparmor_file_permission
,
646 .file_alloc_security
= apparmor_file_alloc_security
,
647 .file_free_security
= apparmor_file_free_security
,
648 .file_mmap
= apparmor_file_mmap
,
649 .file_mprotect
= apparmor_file_mprotect
,
650 .file_lock
= apparmor_file_lock
,
652 .getprocattr
= apparmor_getprocattr
,
653 .setprocattr
= apparmor_setprocattr
,
655 .cred_alloc_blank
= apparmor_cred_alloc_blank
,
656 .cred_free
= apparmor_cred_free
,
657 .cred_prepare
= apparmor_cred_prepare
,
658 .cred_transfer
= apparmor_cred_transfer
,
660 .bprm_set_creds
= apparmor_bprm_set_creds
,
661 .bprm_committing_creds
= apparmor_bprm_committing_creds
,
662 .bprm_committed_creds
= apparmor_bprm_committed_creds
,
663 .bprm_secureexec
= apparmor_bprm_secureexec
,
665 .task_setrlimit
= apparmor_task_setrlimit
,
669 * AppArmor sysfs module parameters
672 static int param_set_aabool(const char *val
, const struct kernel_param
*kp
);
673 static int param_get_aabool(char *buffer
, const struct kernel_param
*kp
);
674 #define param_check_aabool(name, p) __param_check(name, p, int)
675 static struct kernel_param_ops param_ops_aabool
= {
676 .set
= param_set_aabool
,
677 .get
= param_get_aabool
680 static int param_set_aauint(const char *val
, const struct kernel_param
*kp
);
681 static int param_get_aauint(char *buffer
, const struct kernel_param
*kp
);
682 #define param_check_aauint(name, p) __param_check(name, p, int)
683 static struct kernel_param_ops param_ops_aauint
= {
684 .set
= param_set_aauint
,
685 .get
= param_get_aauint
688 static int param_set_aalockpolicy(const char *val
, const struct kernel_param
*kp
);
689 static int param_get_aalockpolicy(char *buffer
, const struct kernel_param
*kp
);
690 #define param_check_aalockpolicy(name, p) __param_check(name, p, int)
691 static struct kernel_param_ops param_ops_aalockpolicy
= {
692 .set
= param_set_aalockpolicy
,
693 .get
= param_get_aalockpolicy
696 static int param_set_audit(const char *val
, struct kernel_param
*kp
);
697 static int param_get_audit(char *buffer
, struct kernel_param
*kp
);
699 static int param_set_mode(const char *val
, struct kernel_param
*kp
);
700 static int param_get_mode(char *buffer
, struct kernel_param
*kp
);
702 /* Flag values, also controllable via /sys/module/apparmor/parameters
703 * We define special types as we want to do additional mediation.
706 /* AppArmor global enforcement switch - complain, enforce, kill */
707 enum profile_mode aa_g_profile_mode
= APPARMOR_ENFORCE
;
708 module_param_call(mode
, param_set_mode
, param_get_mode
,
709 &aa_g_profile_mode
, S_IRUSR
| S_IWUSR
);
713 module_param_named(debug
, aa_g_debug
, aabool
, S_IRUSR
| S_IWUSR
);
716 enum audit_mode aa_g_audit
;
717 module_param_call(audit
, param_set_audit
, param_get_audit
,
718 &aa_g_audit
, S_IRUSR
| S_IWUSR
);
720 /* Determines if audit header is included in audited messages. This
721 * provides more context if the audit daemon is not running
723 int aa_g_audit_header
= 1;
724 module_param_named(audit_header
, aa_g_audit_header
, aabool
,
727 /* lock out loading/removal of policy
728 * TODO: add in at boot loading of policy, which is the only way to
729 * load policy, if lock_policy is set
731 int aa_g_lock_policy
;
732 module_param_named(lock_policy
, aa_g_lock_policy
, aalockpolicy
,
735 /* Syscall logging mode */
737 module_param_named(logsyscall
, aa_g_logsyscall
, aabool
, S_IRUSR
| S_IWUSR
);
739 /* Maximum pathname length before accesses will start getting rejected */
740 unsigned int aa_g_path_max
= 2 * PATH_MAX
;
741 module_param_named(path_max
, aa_g_path_max
, aauint
, S_IRUSR
| S_IWUSR
);
743 /* Determines how paranoid loading of policy is and how much verification
744 * on the loaded policy is done.
746 int aa_g_paranoid_load
= 1;
747 module_param_named(paranoid_load
, aa_g_paranoid_load
, aabool
,
750 /* Boot time disable flag */
751 static unsigned int apparmor_enabled
= CONFIG_SECURITY_APPARMOR_BOOTPARAM_VALUE
;
752 module_param_named(enabled
, apparmor_enabled
, aabool
, S_IRUSR
);
754 static int __init
apparmor_enabled_setup(char *str
)
756 unsigned long enabled
;
757 int error
= strict_strtoul(str
, 0, &enabled
);
759 apparmor_enabled
= enabled
? 1 : 0;
763 __setup("apparmor=", apparmor_enabled_setup
);
765 /* set global flag turning off the ability to load policy */
766 static int param_set_aalockpolicy(const char *val
, const struct kernel_param
*kp
)
768 if (!capable(CAP_MAC_ADMIN
))
770 if (aa_g_lock_policy
)
772 return param_set_bool(val
, kp
);
775 static int param_get_aalockpolicy(char *buffer
, const struct kernel_param
*kp
)
777 if (!capable(CAP_MAC_ADMIN
))
779 return param_get_bool(buffer
, kp
);
782 static int param_set_aabool(const char *val
, const struct kernel_param
*kp
)
784 if (!capable(CAP_MAC_ADMIN
))
786 return param_set_bool(val
, kp
);
789 static int param_get_aabool(char *buffer
, const struct kernel_param
*kp
)
791 if (!capable(CAP_MAC_ADMIN
))
793 return param_get_bool(buffer
, kp
);
796 static int param_set_aauint(const char *val
, const struct kernel_param
*kp
)
798 if (!capable(CAP_MAC_ADMIN
))
800 return param_set_uint(val
, kp
);
803 static int param_get_aauint(char *buffer
, const struct kernel_param
*kp
)
805 if (!capable(CAP_MAC_ADMIN
))
807 return param_get_uint(buffer
, kp
);
810 static int param_get_audit(char *buffer
, struct kernel_param
*kp
)
812 if (!capable(CAP_MAC_ADMIN
))
815 if (!apparmor_enabled
)
818 return sprintf(buffer
, "%s", audit_mode_names
[aa_g_audit
]);
821 static int param_set_audit(const char *val
, struct kernel_param
*kp
)
824 if (!capable(CAP_MAC_ADMIN
))
827 if (!apparmor_enabled
)
833 for (i
= 0; i
< AUDIT_MAX_INDEX
; i
++) {
834 if (strcmp(val
, audit_mode_names
[i
]) == 0) {
843 static int param_get_mode(char *buffer
, struct kernel_param
*kp
)
845 if (!capable(CAP_MAC_ADMIN
))
848 if (!apparmor_enabled
)
851 return sprintf(buffer
, "%s", profile_mode_names
[aa_g_profile_mode
]);
854 static int param_set_mode(const char *val
, struct kernel_param
*kp
)
857 if (!capable(CAP_MAC_ADMIN
))
860 if (!apparmor_enabled
)
866 for (i
= 0; i
< APPARMOR_NAMES_MAX_INDEX
; i
++) {
867 if (strcmp(val
, profile_mode_names
[i
]) == 0) {
868 aa_g_profile_mode
= i
;
877 * AppArmor init functions
881 * set_init_cxt - set a task context and profile on the first task.
883 * TODO: allow setting an alternate profile than unconfined
885 static int __init
set_init_cxt(void)
887 struct cred
*cred
= (struct cred
*)current
->real_cred
;
888 struct aa_task_cxt
*cxt
;
890 cxt
= aa_alloc_task_context(GFP_KERNEL
);
894 cxt
->profile
= aa_get_profile(root_ns
->unconfined
);
895 cred
->security
= cxt
;
900 static int __init
apparmor_init(void)
904 if (!apparmor_enabled
|| !security_module_enable(&apparmor_ops
)) {
905 aa_info_message("AppArmor disabled by boot time parameter");
906 apparmor_enabled
= 0;
910 error
= aa_alloc_root_ns();
912 AA_ERROR("Unable to allocate default profile namespace\n");
916 error
= set_init_cxt();
918 AA_ERROR("Failed to set context on init task\n");
919 goto register_security_out
;
922 error
= register_security(&apparmor_ops
);
924 AA_ERROR("Unable to register AppArmor\n");
925 goto set_init_cxt_out
;
928 /* Report that AppArmor successfully initialized */
929 apparmor_initialized
= 1;
930 if (aa_g_profile_mode
== APPARMOR_COMPLAIN
)
931 aa_info_message("AppArmor initialized: complain mode enabled");
932 else if (aa_g_profile_mode
== APPARMOR_KILL
)
933 aa_info_message("AppArmor initialized: kill mode enabled");
935 aa_info_message("AppArmor initialized");
940 aa_free_task_context(current
->real_cred
->security
);
942 register_security_out
:
948 apparmor_enabled
= 0;
952 security_initcall(apparmor_init
);