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/lsm_hooks.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>
26 #include <linux/netfilter_ipv4.h>
27 #include <linux/netfilter_ipv6.h>
29 #include <uapi/linux/mount.h>
31 #include "include/apparmor.h"
32 #include "include/apparmorfs.h"
33 #include "include/audit.h"
34 #include "include/capability.h"
35 #include "include/cred.h"
36 #include "include/file.h"
37 #include "include/ipc.h"
38 #include "include/net.h"
39 #include "include/path.h"
40 #include "include/label.h"
41 #include "include/policy.h"
42 #include "include/policy_ns.h"
43 #include "include/procattr.h"
44 #include "include/mount.h"
45 #include "include/secid.h"
47 /* Flag indicating whether initialization completed */
48 int apparmor_initialized
;
50 DEFINE_PER_CPU(struct aa_buffers
, aa_buffers
);
58 * put the associated labels
60 static void apparmor_cred_free(struct cred
*cred
)
62 aa_put_label(cred_label(cred
));
63 cred_label(cred
) = NULL
;
67 * allocate the apparmor part of blank credentials
69 static int apparmor_cred_alloc_blank(struct cred
*cred
, gfp_t gfp
)
71 cred_label(cred
) = NULL
;
76 * prepare new cred label for modification by prepare_cred block
78 static int apparmor_cred_prepare(struct cred
*new, const struct cred
*old
,
81 cred_label(new) = aa_get_newest_label(cred_label(old
));
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 cred_label(new) = aa_get_newest_label(cred_label(old
));
93 static void apparmor_task_free(struct task_struct
*task
)
96 aa_free_task_ctx(task_ctx(task
));
97 task_ctx(task
) = NULL
;
100 static int apparmor_task_alloc(struct task_struct
*task
,
101 unsigned long clone_flags
)
103 struct aa_task_ctx
*new = aa_alloc_task_ctx(GFP_KERNEL
);
108 aa_dup_task_ctx(new, task_ctx(current
));
109 task_ctx(task
) = new;
114 static int apparmor_ptrace_access_check(struct task_struct
*child
,
117 struct aa_label
*tracer
, *tracee
;
120 tracer
= __begin_current_label_crit_section();
121 tracee
= aa_get_task_label(child
);
122 error
= aa_may_ptrace(tracer
, tracee
,
123 (mode
& PTRACE_MODE_READ
) ? AA_PTRACE_READ
125 aa_put_label(tracee
);
126 __end_current_label_crit_section(tracer
);
131 static int apparmor_ptrace_traceme(struct task_struct
*parent
)
133 struct aa_label
*tracer
, *tracee
;
136 tracee
= __begin_current_label_crit_section();
137 tracer
= aa_get_task_label(parent
);
138 error
= aa_may_ptrace(tracer
, tracee
, AA_PTRACE_TRACE
);
139 aa_put_label(tracer
);
140 __end_current_label_crit_section(tracee
);
145 /* Derived from security/commoncap.c:cap_capget */
146 static int apparmor_capget(struct task_struct
*target
, kernel_cap_t
*effective
,
147 kernel_cap_t
*inheritable
, kernel_cap_t
*permitted
)
149 struct aa_label
*label
;
150 const struct cred
*cred
;
153 cred
= __task_cred(target
);
154 label
= aa_get_newest_cred_label(cred
);
157 * cap_capget is stacked ahead of this and will
158 * initialize effective and permitted.
160 if (!unconfined(label
)) {
161 struct aa_profile
*profile
;
164 label_for_each_confined(i
, label
, profile
) {
165 if (COMPLAIN_MODE(profile
))
167 *effective
= cap_intersect(*effective
,
168 profile
->caps
.allow
);
169 *permitted
= cap_intersect(*permitted
,
170 profile
->caps
.allow
);
179 static int apparmor_capable(const struct cred
*cred
, struct user_namespace
*ns
,
182 struct aa_label
*label
;
185 label
= aa_get_newest_cred_label(cred
);
186 if (!unconfined(label
))
187 error
= aa_capable(label
, cap
, audit
);
194 * common_perm - basic common permission check wrapper fn for paths
195 * @op: operation being checked
196 * @path: path to check permission of (NOT NULL)
197 * @mask: requested permissions mask
198 * @cond: conditional info for the permission request (NOT NULL)
200 * Returns: %0 else error code if error or permission denied
202 static int common_perm(const char *op
, const struct path
*path
, u32 mask
,
203 struct path_cond
*cond
)
205 struct aa_label
*label
;
208 label
= __begin_current_label_crit_section();
209 if (!unconfined(label
))
210 error
= aa_path_perm(op
, label
, path
, 0, mask
, cond
);
211 __end_current_label_crit_section(label
);
217 * common_perm_cond - common permission wrapper around inode cond
218 * @op: operation being checked
219 * @path: location to check (NOT NULL)
220 * @mask: requested permissions mask
222 * Returns: %0 else error code if error or permission denied
224 static int common_perm_cond(const char *op
, const struct path
*path
, u32 mask
)
226 struct path_cond cond
= { d_backing_inode(path
->dentry
)->i_uid
,
227 d_backing_inode(path
->dentry
)->i_mode
230 if (!path_mediated_fs(path
->dentry
))
233 return common_perm(op
, path
, mask
, &cond
);
237 * common_perm_dir_dentry - common permission wrapper when path is dir, dentry
238 * @op: operation being checked
239 * @dir: directory of the dentry (NOT NULL)
240 * @dentry: dentry to check (NOT NULL)
241 * @mask: requested permissions mask
242 * @cond: conditional info for the permission request (NOT NULL)
244 * Returns: %0 else error code if error or permission denied
246 static int common_perm_dir_dentry(const char *op
, const struct path
*dir
,
247 struct dentry
*dentry
, u32 mask
,
248 struct path_cond
*cond
)
250 struct path path
= { .mnt
= dir
->mnt
, .dentry
= dentry
};
252 return common_perm(op
, &path
, mask
, cond
);
256 * common_perm_rm - common permission wrapper for operations doing rm
257 * @op: operation being checked
258 * @dir: directory that the dentry is in (NOT NULL)
259 * @dentry: dentry being rm'd (NOT NULL)
260 * @mask: requested permission mask
262 * Returns: %0 else error code if error or permission denied
264 static int common_perm_rm(const char *op
, const struct path
*dir
,
265 struct dentry
*dentry
, u32 mask
)
267 struct inode
*inode
= d_backing_inode(dentry
);
268 struct path_cond cond
= { };
270 if (!inode
|| !path_mediated_fs(dentry
))
273 cond
.uid
= inode
->i_uid
;
274 cond
.mode
= inode
->i_mode
;
276 return common_perm_dir_dentry(op
, dir
, dentry
, mask
, &cond
);
280 * common_perm_create - common permission wrapper for operations doing create
281 * @op: operation being checked
282 * @dir: directory that dentry will be created in (NOT NULL)
283 * @dentry: dentry to create (NOT NULL)
284 * @mask: request permission mask
285 * @mode: created file mode
287 * Returns: %0 else error code if error or permission denied
289 static int common_perm_create(const char *op
, const struct path
*dir
,
290 struct dentry
*dentry
, u32 mask
, umode_t mode
)
292 struct path_cond cond
= { current_fsuid(), mode
};
294 if (!path_mediated_fs(dir
->dentry
))
297 return common_perm_dir_dentry(op
, dir
, dentry
, mask
, &cond
);
300 static int apparmor_path_unlink(const struct path
*dir
, struct dentry
*dentry
)
302 return common_perm_rm(OP_UNLINK
, dir
, dentry
, AA_MAY_DELETE
);
305 static int apparmor_path_mkdir(const struct path
*dir
, struct dentry
*dentry
,
308 return common_perm_create(OP_MKDIR
, dir
, dentry
, AA_MAY_CREATE
,
312 static int apparmor_path_rmdir(const struct path
*dir
, struct dentry
*dentry
)
314 return common_perm_rm(OP_RMDIR
, dir
, dentry
, AA_MAY_DELETE
);
317 static int apparmor_path_mknod(const struct path
*dir
, struct dentry
*dentry
,
318 umode_t mode
, unsigned int dev
)
320 return common_perm_create(OP_MKNOD
, dir
, dentry
, AA_MAY_CREATE
, mode
);
323 static int apparmor_path_truncate(const struct path
*path
)
325 return common_perm_cond(OP_TRUNC
, path
, MAY_WRITE
| AA_MAY_SETATTR
);
328 static int apparmor_path_symlink(const struct path
*dir
, struct dentry
*dentry
,
329 const char *old_name
)
331 return common_perm_create(OP_SYMLINK
, dir
, dentry
, AA_MAY_CREATE
,
335 static int apparmor_path_link(struct dentry
*old_dentry
, const struct path
*new_dir
,
336 struct dentry
*new_dentry
)
338 struct aa_label
*label
;
341 if (!path_mediated_fs(old_dentry
))
344 label
= begin_current_label_crit_section();
345 if (!unconfined(label
))
346 error
= aa_path_link(label
, old_dentry
, new_dir
, new_dentry
);
347 end_current_label_crit_section(label
);
352 static int apparmor_path_rename(const struct path
*old_dir
, struct dentry
*old_dentry
,
353 const struct path
*new_dir
, struct dentry
*new_dentry
)
355 struct aa_label
*label
;
358 if (!path_mediated_fs(old_dentry
))
361 label
= begin_current_label_crit_section();
362 if (!unconfined(label
)) {
363 struct path old_path
= { .mnt
= old_dir
->mnt
,
364 .dentry
= old_dentry
};
365 struct path new_path
= { .mnt
= new_dir
->mnt
,
366 .dentry
= new_dentry
};
367 struct path_cond cond
= { d_backing_inode(old_dentry
)->i_uid
,
368 d_backing_inode(old_dentry
)->i_mode
371 error
= aa_path_perm(OP_RENAME_SRC
, label
, &old_path
, 0,
372 MAY_READ
| AA_MAY_GETATTR
| MAY_WRITE
|
373 AA_MAY_SETATTR
| AA_MAY_DELETE
,
376 error
= aa_path_perm(OP_RENAME_DEST
, label
, &new_path
,
377 0, MAY_WRITE
| AA_MAY_SETATTR
|
378 AA_MAY_CREATE
, &cond
);
381 end_current_label_crit_section(label
);
386 static int apparmor_path_chmod(const struct path
*path
, umode_t mode
)
388 return common_perm_cond(OP_CHMOD
, path
, AA_MAY_CHMOD
);
391 static int apparmor_path_chown(const struct path
*path
, kuid_t uid
, kgid_t gid
)
393 return common_perm_cond(OP_CHOWN
, path
, AA_MAY_CHOWN
);
396 static int apparmor_inode_getattr(const struct path
*path
)
398 return common_perm_cond(OP_GETATTR
, path
, AA_MAY_GETATTR
);
401 static int apparmor_file_open(struct file
*file
)
403 struct aa_file_ctx
*fctx
= file_ctx(file
);
404 struct aa_label
*label
;
407 if (!path_mediated_fs(file
->f_path
.dentry
))
410 /* If in exec, permission is handled by bprm hooks.
411 * Cache permissions granted by the previous exec check, with
412 * implicit read and executable mmap which are required to
413 * actually execute the image.
415 if (current
->in_execve
) {
416 fctx
->allow
= MAY_EXEC
| MAY_READ
| AA_EXEC_MMAP
;
420 label
= aa_get_newest_cred_label(file
->f_cred
);
421 if (!unconfined(label
)) {
422 struct inode
*inode
= file_inode(file
);
423 struct path_cond cond
= { inode
->i_uid
, inode
->i_mode
};
425 error
= aa_path_perm(OP_OPEN
, label
, &file
->f_path
, 0,
426 aa_map_file_to_perms(file
), &cond
);
427 /* todo cache full allowed permissions set and state */
428 fctx
->allow
= aa_map_file_to_perms(file
);
435 static int apparmor_file_alloc_security(struct file
*file
)
439 /* freed by apparmor_file_free_security */
440 struct aa_label
*label
= begin_current_label_crit_section();
441 file
->f_security
= aa_alloc_file_ctx(label
, GFP_KERNEL
);
444 end_current_label_crit_section(label
);
449 static void apparmor_file_free_security(struct file
*file
)
451 aa_free_file_ctx(file_ctx(file
));
454 static int common_file_perm(const char *op
, struct file
*file
, u32 mask
)
456 struct aa_label
*label
;
459 /* don't reaudit files closed during inheritance */
460 if (file
->f_path
.dentry
== aa_null
.dentry
)
463 label
= __begin_current_label_crit_section();
464 error
= aa_file_perm(op
, label
, file
, mask
);
465 __end_current_label_crit_section(label
);
470 static int apparmor_file_receive(struct file
*file
)
472 return common_file_perm(OP_FRECEIVE
, file
, aa_map_file_to_perms(file
));
475 static int apparmor_file_permission(struct file
*file
, int mask
)
477 return common_file_perm(OP_FPERM
, file
, mask
);
480 static int apparmor_file_lock(struct file
*file
, unsigned int cmd
)
482 u32 mask
= AA_MAY_LOCK
;
487 return common_file_perm(OP_FLOCK
, file
, mask
);
490 static int common_mmap(const char *op
, struct file
*file
, unsigned long prot
,
495 if (!file
|| !file_ctx(file
))
498 if (prot
& PROT_READ
)
501 * Private mappings don't require write perms since they don't
502 * write back to the files
504 if ((prot
& PROT_WRITE
) && !(flags
& MAP_PRIVATE
))
506 if (prot
& PROT_EXEC
)
507 mask
|= AA_EXEC_MMAP
;
509 return common_file_perm(op
, file
, mask
);
512 static int apparmor_mmap_file(struct file
*file
, unsigned long reqprot
,
513 unsigned long prot
, unsigned long flags
)
515 return common_mmap(OP_FMMAP
, file
, prot
, flags
);
518 static int apparmor_file_mprotect(struct vm_area_struct
*vma
,
519 unsigned long reqprot
, unsigned long prot
)
521 return common_mmap(OP_FMPROT
, vma
->vm_file
, prot
,
522 !(vma
->vm_flags
& VM_SHARED
) ? MAP_PRIVATE
: 0);
525 static int apparmor_sb_mount(const char *dev_name
, const struct path
*path
,
526 const char *type
, unsigned long flags
, void *data
)
528 struct aa_label
*label
;
532 if ((flags
& MS_MGC_MSK
) == MS_MGC_VAL
)
533 flags
&= ~MS_MGC_MSK
;
535 flags
&= ~AA_MS_IGNORE_MASK
;
537 label
= __begin_current_label_crit_section();
538 if (!unconfined(label
)) {
539 if (flags
& MS_REMOUNT
)
540 error
= aa_remount(label
, path
, flags
, data
);
541 else if (flags
& MS_BIND
)
542 error
= aa_bind_mount(label
, path
, dev_name
, flags
);
543 else if (flags
& (MS_SHARED
| MS_PRIVATE
| MS_SLAVE
|
545 error
= aa_mount_change_type(label
, path
, flags
);
546 else if (flags
& MS_MOVE
)
547 error
= aa_move_mount(label
, path
, dev_name
);
549 error
= aa_new_mount(label
, dev_name
, path
, type
,
552 __end_current_label_crit_section(label
);
557 static int apparmor_sb_umount(struct vfsmount
*mnt
, int flags
)
559 struct aa_label
*label
;
562 label
= __begin_current_label_crit_section();
563 if (!unconfined(label
))
564 error
= aa_umount(label
, mnt
, flags
);
565 __end_current_label_crit_section(label
);
570 static int apparmor_sb_pivotroot(const struct path
*old_path
,
571 const struct path
*new_path
)
573 struct aa_label
*label
;
576 label
= aa_get_current_label();
577 if (!unconfined(label
))
578 error
= aa_pivotroot(label
, old_path
, new_path
);
584 static int apparmor_getprocattr(struct task_struct
*task
, char *name
,
589 const struct cred
*cred
= get_task_cred(task
);
590 struct aa_task_ctx
*ctx
= task_ctx(current
);
591 struct aa_label
*label
= NULL
;
593 if (strcmp(name
, "current") == 0)
594 label
= aa_get_newest_label(cred_label(cred
));
595 else if (strcmp(name
, "prev") == 0 && ctx
->previous
)
596 label
= aa_get_newest_label(ctx
->previous
);
597 else if (strcmp(name
, "exec") == 0 && ctx
->onexec
)
598 label
= aa_get_newest_label(ctx
->onexec
);
603 error
= aa_getprocattr(label
, value
);
611 static int apparmor_setprocattr(const char *name
, void *value
,
614 char *command
, *largs
= NULL
, *args
= value
;
617 DEFINE_AUDIT_DATA(sa
, LSM_AUDIT_DATA_NONE
, OP_SETPROCATTR
);
622 /* AppArmor requires that the buffer must be null terminated atm */
623 if (args
[size
- 1] != '\0') {
625 largs
= args
= kmalloc(size
+ 1, GFP_KERNEL
);
628 memcpy(args
, value
, size
);
634 command
= strsep(&args
, " ");
637 args
= skip_spaces(args
);
641 arg_size
= size
- (args
- (largs
? largs
: (char *) value
));
642 if (strcmp(name
, "current") == 0) {
643 if (strcmp(command
, "changehat") == 0) {
644 error
= aa_setprocattr_changehat(args
, arg_size
,
646 } else if (strcmp(command
, "permhat") == 0) {
647 error
= aa_setprocattr_changehat(args
, arg_size
,
649 } else if (strcmp(command
, "changeprofile") == 0) {
650 error
= aa_change_profile(args
, AA_CHANGE_NOFLAGS
);
651 } else if (strcmp(command
, "permprofile") == 0) {
652 error
= aa_change_profile(args
, AA_CHANGE_TEST
);
653 } else if (strcmp(command
, "stack") == 0) {
654 error
= aa_change_profile(args
, AA_CHANGE_STACK
);
657 } else if (strcmp(name
, "exec") == 0) {
658 if (strcmp(command
, "exec") == 0)
659 error
= aa_change_profile(args
, AA_CHANGE_ONEXEC
);
660 else if (strcmp(command
, "stack") == 0)
661 error
= aa_change_profile(args
, (AA_CHANGE_ONEXEC
|
666 /* only support the "current" and "exec" process attributes */
676 aad(&sa
)->label
= begin_current_label_crit_section();
677 aad(&sa
)->info
= name
;
678 aad(&sa
)->error
= error
= -EINVAL
;
679 aa_audit_msg(AUDIT_APPARMOR_DENIED
, &sa
, NULL
);
680 end_current_label_crit_section(aad(&sa
)->label
);
685 * apparmor_bprm_committing_creds - do task cleanup on committing new creds
686 * @bprm: binprm for the exec (NOT NULL)
688 static void apparmor_bprm_committing_creds(struct linux_binprm
*bprm
)
690 struct aa_label
*label
= aa_current_raw_label();
691 struct aa_label
*new_label
= cred_label(bprm
->cred
);
693 /* bail out if unconfined or not changing profile */
694 if ((new_label
->proxy
== label
->proxy
) ||
695 (unconfined(new_label
)))
698 aa_inherit_files(bprm
->cred
, current
->files
);
700 current
->pdeath_signal
= 0;
702 /* reset soft limits and set hard limits for the new label */
703 __aa_transition_rlimits(label
, new_label
);
707 * apparmor_bprm_committed_cred - do cleanup after new creds committed
708 * @bprm: binprm for the exec (NOT NULL)
710 static void apparmor_bprm_committed_creds(struct linux_binprm
*bprm
)
712 /* clear out temporary/transitional state from the context */
713 aa_clear_task_ctx_trans(task_ctx(current
));
718 static void apparmor_task_getsecid(struct task_struct
*p
, u32
*secid
)
720 struct aa_label
*label
= aa_get_task_label(p
);
721 *secid
= label
->secid
;
725 static int apparmor_task_setrlimit(struct task_struct
*task
,
726 unsigned int resource
, struct rlimit
*new_rlim
)
728 struct aa_label
*label
= __begin_current_label_crit_section();
731 if (!unconfined(label
))
732 error
= aa_task_setrlimit(label
, task
, resource
, new_rlim
);
733 __end_current_label_crit_section(label
);
738 static int apparmor_task_kill(struct task_struct
*target
, struct kernel_siginfo
*info
,
739 int sig
, const struct cred
*cred
)
741 struct aa_label
*cl
, *tl
;
746 * Dealing with USB IO specific behavior
748 cl
= aa_get_newest_cred_label(cred
);
749 tl
= aa_get_task_label(target
);
750 error
= aa_may_signal(cl
, tl
, sig
);
756 cl
= __begin_current_label_crit_section();
757 tl
= aa_get_task_label(target
);
758 error
= aa_may_signal(cl
, tl
, sig
);
760 __end_current_label_crit_section(cl
);
766 * apparmor_sk_alloc_security - allocate and attach the sk_security field
768 static int apparmor_sk_alloc_security(struct sock
*sk
, int family
, gfp_t flags
)
770 struct aa_sk_ctx
*ctx
;
772 ctx
= kzalloc(sizeof(*ctx
), flags
);
782 * apparmor_sk_free_security - free the sk_security field
784 static void apparmor_sk_free_security(struct sock
*sk
)
786 struct aa_sk_ctx
*ctx
= SK_CTX(sk
);
789 aa_put_label(ctx
->label
);
790 aa_put_label(ctx
->peer
);
795 * apparmor_clone_security - clone the sk_security field
797 static void apparmor_sk_clone_security(const struct sock
*sk
,
800 struct aa_sk_ctx
*ctx
= SK_CTX(sk
);
801 struct aa_sk_ctx
*new = SK_CTX(newsk
);
803 new->label
= aa_get_label(ctx
->label
);
804 new->peer
= aa_get_label(ctx
->peer
);
808 * apparmor_socket_create - check perms before creating a new socket
810 static int apparmor_socket_create(int family
, int type
, int protocol
, int kern
)
812 struct aa_label
*label
;
815 AA_BUG(in_interrupt());
817 label
= begin_current_label_crit_section();
818 if (!(kern
|| unconfined(label
)))
819 error
= af_select(family
,
820 create_perm(label
, family
, type
, protocol
),
821 aa_af_perm(label
, OP_CREATE
, AA_MAY_CREATE
,
822 family
, type
, protocol
));
823 end_current_label_crit_section(label
);
829 * apparmor_socket_post_create - setup the per-socket security struct
832 * - kernel sockets currently labeled unconfined but we may want to
833 * move to a special kernel label
834 * - socket may not have sk here if created with sock_create_lite or
835 * sock_alloc. These should be accept cases which will be handled in
838 static int apparmor_socket_post_create(struct socket
*sock
, int family
,
839 int type
, int protocol
, int kern
)
841 struct aa_label
*label
;
844 struct aa_ns
*ns
= aa_get_current_ns();
846 label
= aa_get_label(ns_unconfined(ns
));
849 label
= aa_get_current_label();
852 struct aa_sk_ctx
*ctx
= SK_CTX(sock
->sk
);
854 aa_put_label(ctx
->label
);
855 ctx
->label
= aa_get_label(label
);
863 * apparmor_socket_bind - check perms before bind addr to socket
865 static int apparmor_socket_bind(struct socket
*sock
,
866 struct sockaddr
*address
, int addrlen
)
871 AA_BUG(in_interrupt());
873 return af_select(sock
->sk
->sk_family
,
874 bind_perm(sock
, address
, addrlen
),
875 aa_sk_perm(OP_BIND
, AA_MAY_BIND
, sock
->sk
));
879 * apparmor_socket_connect - check perms before connecting @sock to @address
881 static int apparmor_socket_connect(struct socket
*sock
,
882 struct sockaddr
*address
, int addrlen
)
887 AA_BUG(in_interrupt());
889 return af_select(sock
->sk
->sk_family
,
890 connect_perm(sock
, address
, addrlen
),
891 aa_sk_perm(OP_CONNECT
, AA_MAY_CONNECT
, sock
->sk
));
895 * apparmor_socket_list - check perms before allowing listen
897 static int apparmor_socket_listen(struct socket
*sock
, int backlog
)
901 AA_BUG(in_interrupt());
903 return af_select(sock
->sk
->sk_family
,
904 listen_perm(sock
, backlog
),
905 aa_sk_perm(OP_LISTEN
, AA_MAY_LISTEN
, sock
->sk
));
909 * apparmor_socket_accept - check perms before accepting a new connection.
911 * Note: while @newsock is created and has some information, the accept
914 static int apparmor_socket_accept(struct socket
*sock
, struct socket
*newsock
)
919 AA_BUG(in_interrupt());
921 return af_select(sock
->sk
->sk_family
,
922 accept_perm(sock
, newsock
),
923 aa_sk_perm(OP_ACCEPT
, AA_MAY_ACCEPT
, sock
->sk
));
926 static int aa_sock_msg_perm(const char *op
, u32 request
, struct socket
*sock
,
927 struct msghdr
*msg
, int size
)
932 AA_BUG(in_interrupt());
934 return af_select(sock
->sk
->sk_family
,
935 msg_perm(op
, request
, sock
, msg
, size
),
936 aa_sk_perm(op
, request
, sock
->sk
));
940 * apparmor_socket_sendmsg - check perms before sending msg to another socket
942 static int apparmor_socket_sendmsg(struct socket
*sock
,
943 struct msghdr
*msg
, int size
)
945 return aa_sock_msg_perm(OP_SENDMSG
, AA_MAY_SEND
, sock
, msg
, size
);
949 * apparmor_socket_recvmsg - check perms before receiving a message
951 static int apparmor_socket_recvmsg(struct socket
*sock
,
952 struct msghdr
*msg
, int size
, int flags
)
954 return aa_sock_msg_perm(OP_RECVMSG
, AA_MAY_RECEIVE
, sock
, msg
, size
);
957 /* revaliation, get/set attr, shutdown */
958 static int aa_sock_perm(const char *op
, u32 request
, struct socket
*sock
)
962 AA_BUG(in_interrupt());
964 return af_select(sock
->sk
->sk_family
,
965 sock_perm(op
, request
, sock
),
966 aa_sk_perm(op
, request
, sock
->sk
));
970 * apparmor_socket_getsockname - check perms before getting the local address
972 static int apparmor_socket_getsockname(struct socket
*sock
)
974 return aa_sock_perm(OP_GETSOCKNAME
, AA_MAY_GETATTR
, sock
);
978 * apparmor_socket_getpeername - check perms before getting remote address
980 static int apparmor_socket_getpeername(struct socket
*sock
)
982 return aa_sock_perm(OP_GETPEERNAME
, AA_MAY_GETATTR
, sock
);
985 /* revaliation, get/set attr, opt */
986 static int aa_sock_opt_perm(const char *op
, u32 request
, struct socket
*sock
,
987 int level
, int optname
)
991 AA_BUG(in_interrupt());
993 return af_select(sock
->sk
->sk_family
,
994 opt_perm(op
, request
, sock
, level
, optname
),
995 aa_sk_perm(op
, request
, sock
->sk
));
999 * apparmor_getsockopt - check perms before getting socket options
1001 static int apparmor_socket_getsockopt(struct socket
*sock
, int level
,
1004 return aa_sock_opt_perm(OP_GETSOCKOPT
, AA_MAY_GETOPT
, sock
,
1009 * apparmor_setsockopt - check perms before setting socket options
1011 static int apparmor_socket_setsockopt(struct socket
*sock
, int level
,
1014 return aa_sock_opt_perm(OP_SETSOCKOPT
, AA_MAY_SETOPT
, sock
,
1019 * apparmor_socket_shutdown - check perms before shutting down @sock conn
1021 static int apparmor_socket_shutdown(struct socket
*sock
, int how
)
1023 return aa_sock_perm(OP_SHUTDOWN
, AA_MAY_SHUTDOWN
, sock
);
1026 #ifdef CONFIG_NETWORK_SECMARK
1028 * apparmor_socket_sock_recv_skb - check perms before associating skb to sk
1030 * Note: can not sleep may be called with locks held
1032 * dont want protocol specific in __skb_recv_datagram()
1033 * to deny an incoming connection socket_sock_rcv_skb()
1035 static int apparmor_socket_sock_rcv_skb(struct sock
*sk
, struct sk_buff
*skb
)
1037 struct aa_sk_ctx
*ctx
= SK_CTX(sk
);
1042 return apparmor_secmark_check(ctx
->label
, OP_RECVMSG
, AA_MAY_RECEIVE
,
1048 static struct aa_label
*sk_peer_label(struct sock
*sk
)
1050 struct aa_sk_ctx
*ctx
= SK_CTX(sk
);
1055 return ERR_PTR(-ENOPROTOOPT
);
1059 * apparmor_socket_getpeersec_stream - get security context of peer
1061 * Note: for tcp only valid if using ipsec or cipso on lan
1063 static int apparmor_socket_getpeersec_stream(struct socket
*sock
,
1064 char __user
*optval
,
1069 int slen
, error
= 0;
1070 struct aa_label
*label
;
1071 struct aa_label
*peer
;
1073 label
= begin_current_label_crit_section();
1074 peer
= sk_peer_label(sock
->sk
);
1076 error
= PTR_ERR(peer
);
1079 slen
= aa_label_asxprint(&name
, labels_ns(label
), peer
,
1080 FLAG_SHOW_MODE
| FLAG_VIEW_SUBNS
|
1081 FLAG_HIDDEN_UNCONFINED
, GFP_KERNEL
);
1082 /* don't include terminating \0 in slen, it breaks some apps */
1088 } else if (copy_to_user(optval
, name
, slen
)) {
1092 if (put_user(slen
, optlen
))
1100 end_current_label_crit_section(label
);
1106 * apparmor_socket_getpeersec_dgram - get security label of packet
1107 * @sock: the peer socket
1109 * @secid: pointer to where to put the secid of the packet
1111 * Sets the netlabel socket state on sk from parent
1113 static int apparmor_socket_getpeersec_dgram(struct socket
*sock
,
1114 struct sk_buff
*skb
, u32
*secid
)
1117 /* TODO: requires secid support */
1118 return -ENOPROTOOPT
;
1122 * apparmor_sock_graft - Initialize newly created socket
1124 * @parent: parent socket
1126 * Note: could set off of SOCK_CTX(parent) but need to track inode and we can
1127 * just set sk security information off of current creating process label
1128 * Labeling of sk for accept case - probably should be sock based
1129 * instead of task, because of the case where an implicitly labeled
1130 * socket is shared by different tasks.
1132 static void apparmor_sock_graft(struct sock
*sk
, struct socket
*parent
)
1134 struct aa_sk_ctx
*ctx
= SK_CTX(sk
);
1137 ctx
->label
= aa_get_current_label();
1140 #ifdef CONFIG_NETWORK_SECMARK
1141 static int apparmor_inet_conn_request(struct sock
*sk
, struct sk_buff
*skb
,
1142 struct request_sock
*req
)
1144 struct aa_sk_ctx
*ctx
= SK_CTX(sk
);
1149 return apparmor_secmark_check(ctx
->label
, OP_CONNECT
, AA_MAY_CONNECT
,
1154 static struct security_hook_list apparmor_hooks
[] __lsm_ro_after_init
= {
1155 LSM_HOOK_INIT(ptrace_access_check
, apparmor_ptrace_access_check
),
1156 LSM_HOOK_INIT(ptrace_traceme
, apparmor_ptrace_traceme
),
1157 LSM_HOOK_INIT(capget
, apparmor_capget
),
1158 LSM_HOOK_INIT(capable
, apparmor_capable
),
1160 LSM_HOOK_INIT(sb_mount
, apparmor_sb_mount
),
1161 LSM_HOOK_INIT(sb_umount
, apparmor_sb_umount
),
1162 LSM_HOOK_INIT(sb_pivotroot
, apparmor_sb_pivotroot
),
1164 LSM_HOOK_INIT(path_link
, apparmor_path_link
),
1165 LSM_HOOK_INIT(path_unlink
, apparmor_path_unlink
),
1166 LSM_HOOK_INIT(path_symlink
, apparmor_path_symlink
),
1167 LSM_HOOK_INIT(path_mkdir
, apparmor_path_mkdir
),
1168 LSM_HOOK_INIT(path_rmdir
, apparmor_path_rmdir
),
1169 LSM_HOOK_INIT(path_mknod
, apparmor_path_mknod
),
1170 LSM_HOOK_INIT(path_rename
, apparmor_path_rename
),
1171 LSM_HOOK_INIT(path_chmod
, apparmor_path_chmod
),
1172 LSM_HOOK_INIT(path_chown
, apparmor_path_chown
),
1173 LSM_HOOK_INIT(path_truncate
, apparmor_path_truncate
),
1174 LSM_HOOK_INIT(inode_getattr
, apparmor_inode_getattr
),
1176 LSM_HOOK_INIT(file_open
, apparmor_file_open
),
1177 LSM_HOOK_INIT(file_receive
, apparmor_file_receive
),
1178 LSM_HOOK_INIT(file_permission
, apparmor_file_permission
),
1179 LSM_HOOK_INIT(file_alloc_security
, apparmor_file_alloc_security
),
1180 LSM_HOOK_INIT(file_free_security
, apparmor_file_free_security
),
1181 LSM_HOOK_INIT(mmap_file
, apparmor_mmap_file
),
1182 LSM_HOOK_INIT(file_mprotect
, apparmor_file_mprotect
),
1183 LSM_HOOK_INIT(file_lock
, apparmor_file_lock
),
1185 LSM_HOOK_INIT(getprocattr
, apparmor_getprocattr
),
1186 LSM_HOOK_INIT(setprocattr
, apparmor_setprocattr
),
1188 LSM_HOOK_INIT(sk_alloc_security
, apparmor_sk_alloc_security
),
1189 LSM_HOOK_INIT(sk_free_security
, apparmor_sk_free_security
),
1190 LSM_HOOK_INIT(sk_clone_security
, apparmor_sk_clone_security
),
1192 LSM_HOOK_INIT(socket_create
, apparmor_socket_create
),
1193 LSM_HOOK_INIT(socket_post_create
, apparmor_socket_post_create
),
1194 LSM_HOOK_INIT(socket_bind
, apparmor_socket_bind
),
1195 LSM_HOOK_INIT(socket_connect
, apparmor_socket_connect
),
1196 LSM_HOOK_INIT(socket_listen
, apparmor_socket_listen
),
1197 LSM_HOOK_INIT(socket_accept
, apparmor_socket_accept
),
1198 LSM_HOOK_INIT(socket_sendmsg
, apparmor_socket_sendmsg
),
1199 LSM_HOOK_INIT(socket_recvmsg
, apparmor_socket_recvmsg
),
1200 LSM_HOOK_INIT(socket_getsockname
, apparmor_socket_getsockname
),
1201 LSM_HOOK_INIT(socket_getpeername
, apparmor_socket_getpeername
),
1202 LSM_HOOK_INIT(socket_getsockopt
, apparmor_socket_getsockopt
),
1203 LSM_HOOK_INIT(socket_setsockopt
, apparmor_socket_setsockopt
),
1204 LSM_HOOK_INIT(socket_shutdown
, apparmor_socket_shutdown
),
1205 #ifdef CONFIG_NETWORK_SECMARK
1206 LSM_HOOK_INIT(socket_sock_rcv_skb
, apparmor_socket_sock_rcv_skb
),
1208 LSM_HOOK_INIT(socket_getpeersec_stream
,
1209 apparmor_socket_getpeersec_stream
),
1210 LSM_HOOK_INIT(socket_getpeersec_dgram
,
1211 apparmor_socket_getpeersec_dgram
),
1212 LSM_HOOK_INIT(sock_graft
, apparmor_sock_graft
),
1213 #ifdef CONFIG_NETWORK_SECMARK
1214 LSM_HOOK_INIT(inet_conn_request
, apparmor_inet_conn_request
),
1217 LSM_HOOK_INIT(cred_alloc_blank
, apparmor_cred_alloc_blank
),
1218 LSM_HOOK_INIT(cred_free
, apparmor_cred_free
),
1219 LSM_HOOK_INIT(cred_prepare
, apparmor_cred_prepare
),
1220 LSM_HOOK_INIT(cred_transfer
, apparmor_cred_transfer
),
1222 LSM_HOOK_INIT(bprm_set_creds
, apparmor_bprm_set_creds
),
1223 LSM_HOOK_INIT(bprm_committing_creds
, apparmor_bprm_committing_creds
),
1224 LSM_HOOK_INIT(bprm_committed_creds
, apparmor_bprm_committed_creds
),
1226 LSM_HOOK_INIT(task_free
, apparmor_task_free
),
1227 LSM_HOOK_INIT(task_alloc
, apparmor_task_alloc
),
1228 LSM_HOOK_INIT(task_getsecid
, apparmor_task_getsecid
),
1229 LSM_HOOK_INIT(task_setrlimit
, apparmor_task_setrlimit
),
1230 LSM_HOOK_INIT(task_kill
, apparmor_task_kill
),
1233 LSM_HOOK_INIT(audit_rule_init
, aa_audit_rule_init
),
1234 LSM_HOOK_INIT(audit_rule_known
, aa_audit_rule_known
),
1235 LSM_HOOK_INIT(audit_rule_match
, aa_audit_rule_match
),
1236 LSM_HOOK_INIT(audit_rule_free
, aa_audit_rule_free
),
1239 LSM_HOOK_INIT(secid_to_secctx
, apparmor_secid_to_secctx
),
1240 LSM_HOOK_INIT(secctx_to_secid
, apparmor_secctx_to_secid
),
1241 LSM_HOOK_INIT(release_secctx
, apparmor_release_secctx
),
1245 * AppArmor sysfs module parameters
1248 static int param_set_aabool(const char *val
, const struct kernel_param
*kp
);
1249 static int param_get_aabool(char *buffer
, const struct kernel_param
*kp
);
1250 #define param_check_aabool param_check_bool
1251 static const struct kernel_param_ops param_ops_aabool
= {
1252 .flags
= KERNEL_PARAM_OPS_FL_NOARG
,
1253 .set
= param_set_aabool
,
1254 .get
= param_get_aabool
1257 static int param_set_aauint(const char *val
, const struct kernel_param
*kp
);
1258 static int param_get_aauint(char *buffer
, const struct kernel_param
*kp
);
1259 #define param_check_aauint param_check_uint
1260 static const struct kernel_param_ops param_ops_aauint
= {
1261 .set
= param_set_aauint
,
1262 .get
= param_get_aauint
1265 static int param_set_aalockpolicy(const char *val
, const struct kernel_param
*kp
);
1266 static int param_get_aalockpolicy(char *buffer
, const struct kernel_param
*kp
);
1267 #define param_check_aalockpolicy param_check_bool
1268 static const struct kernel_param_ops param_ops_aalockpolicy
= {
1269 .flags
= KERNEL_PARAM_OPS_FL_NOARG
,
1270 .set
= param_set_aalockpolicy
,
1271 .get
= param_get_aalockpolicy
1274 static int param_set_audit(const char *val
, const struct kernel_param
*kp
);
1275 static int param_get_audit(char *buffer
, const struct kernel_param
*kp
);
1277 static int param_set_mode(const char *val
, const struct kernel_param
*kp
);
1278 static int param_get_mode(char *buffer
, const struct kernel_param
*kp
);
1280 /* Flag values, also controllable via /sys/module/apparmor/parameters
1281 * We define special types as we want to do additional mediation.
1284 /* AppArmor global enforcement switch - complain, enforce, kill */
1285 enum profile_mode aa_g_profile_mode
= APPARMOR_ENFORCE
;
1286 module_param_call(mode
, param_set_mode
, param_get_mode
,
1287 &aa_g_profile_mode
, S_IRUSR
| S_IWUSR
);
1289 /* whether policy verification hashing is enabled */
1290 bool aa_g_hash_policy
= IS_ENABLED(CONFIG_SECURITY_APPARMOR_HASH_DEFAULT
);
1291 #ifdef CONFIG_SECURITY_APPARMOR_HASH
1292 module_param_named(hash_policy
, aa_g_hash_policy
, aabool
, S_IRUSR
| S_IWUSR
);
1296 bool aa_g_debug
= IS_ENABLED(CONFIG_SECURITY_APPARMOR_DEBUG_MESSAGES
);
1297 module_param_named(debug
, aa_g_debug
, aabool
, S_IRUSR
| S_IWUSR
);
1300 enum audit_mode aa_g_audit
;
1301 module_param_call(audit
, param_set_audit
, param_get_audit
,
1302 &aa_g_audit
, S_IRUSR
| S_IWUSR
);
1304 /* Determines if audit header is included in audited messages. This
1305 * provides more context if the audit daemon is not running
1307 bool aa_g_audit_header
= true;
1308 module_param_named(audit_header
, aa_g_audit_header
, aabool
,
1311 /* lock out loading/removal of policy
1312 * TODO: add in at boot loading of policy, which is the only way to
1313 * load policy, if lock_policy is set
1315 bool aa_g_lock_policy
;
1316 module_param_named(lock_policy
, aa_g_lock_policy
, aalockpolicy
,
1319 /* Syscall logging mode */
1320 bool aa_g_logsyscall
;
1321 module_param_named(logsyscall
, aa_g_logsyscall
, aabool
, S_IRUSR
| S_IWUSR
);
1323 /* Maximum pathname length before accesses will start getting rejected */
1324 unsigned int aa_g_path_max
= 2 * PATH_MAX
;
1325 module_param_named(path_max
, aa_g_path_max
, aauint
, S_IRUSR
);
1327 /* Determines how paranoid loading of policy is and how much verification
1328 * on the loaded policy is done.
1329 * DEPRECATED: read only as strict checking of load is always done now
1330 * that none root users (user namespaces) can load policy.
1332 bool aa_g_paranoid_load
= true;
1333 module_param_named(paranoid_load
, aa_g_paranoid_load
, aabool
, S_IRUGO
);
1335 /* Boot time disable flag */
1336 static bool apparmor_enabled
= CONFIG_SECURITY_APPARMOR_BOOTPARAM_VALUE
;
1337 module_param_named(enabled
, apparmor_enabled
, bool, S_IRUGO
);
1339 static int __init
apparmor_enabled_setup(char *str
)
1341 unsigned long enabled
;
1342 int error
= kstrtoul(str
, 0, &enabled
);
1344 apparmor_enabled
= enabled
? 1 : 0;
1348 __setup("apparmor=", apparmor_enabled_setup
);
1350 /* set global flag turning off the ability to load policy */
1351 static int param_set_aalockpolicy(const char *val
, const struct kernel_param
*kp
)
1353 if (!apparmor_enabled
)
1355 if (apparmor_initialized
&& !policy_admin_capable(NULL
))
1357 return param_set_bool(val
, kp
);
1360 static int param_get_aalockpolicy(char *buffer
, const struct kernel_param
*kp
)
1362 if (!apparmor_enabled
)
1364 if (apparmor_initialized
&& !policy_view_capable(NULL
))
1366 return param_get_bool(buffer
, kp
);
1369 static int param_set_aabool(const char *val
, const struct kernel_param
*kp
)
1371 if (!apparmor_enabled
)
1373 if (apparmor_initialized
&& !policy_admin_capable(NULL
))
1375 return param_set_bool(val
, kp
);
1378 static int param_get_aabool(char *buffer
, const struct kernel_param
*kp
)
1380 if (!apparmor_enabled
)
1382 if (apparmor_initialized
&& !policy_view_capable(NULL
))
1384 return param_get_bool(buffer
, kp
);
1387 static int param_set_aauint(const char *val
, const struct kernel_param
*kp
)
1391 if (!apparmor_enabled
)
1393 /* file is ro but enforce 2nd line check */
1394 if (apparmor_initialized
)
1397 error
= param_set_uint(val
, kp
);
1398 pr_info("AppArmor: buffer size set to %d bytes\n", aa_g_path_max
);
1403 static int param_get_aauint(char *buffer
, const struct kernel_param
*kp
)
1405 if (!apparmor_enabled
)
1407 if (apparmor_initialized
&& !policy_view_capable(NULL
))
1409 return param_get_uint(buffer
, kp
);
1412 static int param_get_audit(char *buffer
, const struct kernel_param
*kp
)
1414 if (!apparmor_enabled
)
1416 if (apparmor_initialized
&& !policy_view_capable(NULL
))
1418 return sprintf(buffer
, "%s", audit_mode_names
[aa_g_audit
]);
1421 static int param_set_audit(const char *val
, const struct kernel_param
*kp
)
1425 if (!apparmor_enabled
)
1429 if (apparmor_initialized
&& !policy_admin_capable(NULL
))
1432 i
= match_string(audit_mode_names
, AUDIT_MAX_INDEX
, val
);
1440 static int param_get_mode(char *buffer
, const struct kernel_param
*kp
)
1442 if (!apparmor_enabled
)
1444 if (apparmor_initialized
&& !policy_view_capable(NULL
))
1447 return sprintf(buffer
, "%s", aa_profile_mode_names
[aa_g_profile_mode
]);
1450 static int param_set_mode(const char *val
, const struct kernel_param
*kp
)
1454 if (!apparmor_enabled
)
1458 if (apparmor_initialized
&& !policy_admin_capable(NULL
))
1461 i
= match_string(aa_profile_mode_names
, APPARMOR_MODE_NAMES_MAX_INDEX
,
1466 aa_g_profile_mode
= i
;
1471 * AppArmor init functions
1475 * set_init_ctx - set a task context and profile on the first task.
1477 * TODO: allow setting an alternate profile than unconfined
1479 static int __init
set_init_ctx(void)
1481 struct cred
*cred
= (struct cred
*)current
->real_cred
;
1482 struct aa_task_ctx
*ctx
;
1484 ctx
= aa_alloc_task_ctx(GFP_KERNEL
);
1488 cred_label(cred
) = aa_get_label(ns_unconfined(root_ns
));
1489 task_ctx(current
) = ctx
;
1494 static void destroy_buffers(void)
1498 for_each_possible_cpu(i
) {
1499 for_each_cpu_buffer(j
) {
1500 kfree(per_cpu(aa_buffers
, i
).buf
[j
]);
1501 per_cpu(aa_buffers
, i
).buf
[j
] = NULL
;
1506 static int __init
alloc_buffers(void)
1510 for_each_possible_cpu(i
) {
1511 for_each_cpu_buffer(j
) {
1514 if (cpu_to_node(i
) > num_online_nodes())
1515 /* fallback to kmalloc for offline nodes */
1516 buffer
= kmalloc(aa_g_path_max
, GFP_KERNEL
);
1518 buffer
= kmalloc_node(aa_g_path_max
, GFP_KERNEL
,
1524 per_cpu(aa_buffers
, i
).buf
[j
] = buffer
;
1531 #ifdef CONFIG_SYSCTL
1532 static int apparmor_dointvec(struct ctl_table
*table
, int write
,
1533 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
1535 if (!policy_admin_capable(NULL
))
1537 if (!apparmor_enabled
)
1540 return proc_dointvec(table
, write
, buffer
, lenp
, ppos
);
1543 static struct ctl_path apparmor_sysctl_path
[] = {
1544 { .procname
= "kernel", },
1548 static struct ctl_table apparmor_sysctl_table
[] = {
1550 .procname
= "unprivileged_userns_apparmor_policy",
1551 .data
= &unprivileged_userns_apparmor_policy
,
1552 .maxlen
= sizeof(int),
1554 .proc_handler
= apparmor_dointvec
,
1559 static int __init
apparmor_init_sysctl(void)
1561 return register_sysctl_paths(apparmor_sysctl_path
,
1562 apparmor_sysctl_table
) ? 0 : -ENOMEM
;
1565 static inline int apparmor_init_sysctl(void)
1569 #endif /* CONFIG_SYSCTL */
1571 #if defined(CONFIG_NETFILTER) && defined(CONFIG_NETWORK_SECMARK)
1572 static unsigned int apparmor_ip_postroute(void *priv
,
1573 struct sk_buff
*skb
,
1574 const struct nf_hook_state
*state
)
1576 struct aa_sk_ctx
*ctx
;
1582 sk
= skb_to_full_sk(skb
);
1587 if (!apparmor_secmark_check(ctx
->label
, OP_SENDMSG
, AA_MAY_SEND
,
1591 return NF_DROP_ERR(-ECONNREFUSED
);
1595 static unsigned int apparmor_ipv4_postroute(void *priv
,
1596 struct sk_buff
*skb
,
1597 const struct nf_hook_state
*state
)
1599 return apparmor_ip_postroute(priv
, skb
, state
);
1602 static unsigned int apparmor_ipv6_postroute(void *priv
,
1603 struct sk_buff
*skb
,
1604 const struct nf_hook_state
*state
)
1606 return apparmor_ip_postroute(priv
, skb
, state
);
1609 static const struct nf_hook_ops apparmor_nf_ops
[] = {
1611 .hook
= apparmor_ipv4_postroute
,
1613 .hooknum
= NF_INET_POST_ROUTING
,
1614 .priority
= NF_IP_PRI_SELINUX_FIRST
,
1616 #if IS_ENABLED(CONFIG_IPV6)
1618 .hook
= apparmor_ipv6_postroute
,
1620 .hooknum
= NF_INET_POST_ROUTING
,
1621 .priority
= NF_IP6_PRI_SELINUX_FIRST
,
1626 static int __net_init
apparmor_nf_register(struct net
*net
)
1630 ret
= nf_register_net_hooks(net
, apparmor_nf_ops
,
1631 ARRAY_SIZE(apparmor_nf_ops
));
1635 static void __net_exit
apparmor_nf_unregister(struct net
*net
)
1637 nf_unregister_net_hooks(net
, apparmor_nf_ops
,
1638 ARRAY_SIZE(apparmor_nf_ops
));
1641 static struct pernet_operations apparmor_net_ops
= {
1642 .init
= apparmor_nf_register
,
1643 .exit
= apparmor_nf_unregister
,
1646 static int __init
apparmor_nf_ip_init(void)
1650 if (!apparmor_enabled
)
1653 err
= register_pernet_subsys(&apparmor_net_ops
);
1655 panic("Apparmor: register_pernet_subsys: error %d\n", err
);
1659 __initcall(apparmor_nf_ip_init
);
1662 static int __init
apparmor_init(void)
1666 if (!apparmor_enabled
|| !security_module_enable("apparmor")) {
1667 aa_info_message("AppArmor disabled by boot time parameter");
1668 apparmor_enabled
= false;
1674 error
= aa_setup_dfa_engine();
1676 AA_ERROR("Unable to setup dfa engine\n");
1680 error
= aa_alloc_root_ns();
1682 AA_ERROR("Unable to allocate default profile namespace\n");
1686 error
= apparmor_init_sysctl();
1688 AA_ERROR("Unable to register sysctls\n");
1693 error
= alloc_buffers();
1695 AA_ERROR("Unable to allocate work buffers\n");
1699 error
= set_init_ctx();
1701 AA_ERROR("Failed to set context on init task\n");
1705 security_add_hooks(apparmor_hooks
, ARRAY_SIZE(apparmor_hooks
),
1708 /* Report that AppArmor successfully initialized */
1709 apparmor_initialized
= 1;
1710 if (aa_g_profile_mode
== APPARMOR_COMPLAIN
)
1711 aa_info_message("AppArmor initialized: complain mode enabled");
1712 else if (aa_g_profile_mode
== APPARMOR_KILL
)
1713 aa_info_message("AppArmor initialized: kill mode enabled");
1715 aa_info_message("AppArmor initialized");
1724 aa_teardown_dfa_engine();
1726 apparmor_enabled
= false;
1730 DEFINE_LSM(apparmor
) = {
1732 .init
= apparmor_init
,