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15#include <linux/security.h>
16#include <linux/moduleparam.h>
17#include <linux/mm.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 <net/sock.h>
27
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"
38
39
40int apparmor_initialized __initdata;
41
42
43
44
45
46
47
48
49static void apparmor_cred_free(struct cred *cred)
50{
51 aa_free_task_context(cred_cxt(cred));
52 cred_cxt(cred) = NULL;
53}
54
55
56
57
58static int apparmor_cred_alloc_blank(struct cred *cred, gfp_t gfp)
59{
60
61 struct aa_task_cxt *cxt = aa_alloc_task_context(gfp);
62 if (!cxt)
63 return -ENOMEM;
64
65 cred_cxt(cred) = cxt;
66 return 0;
67}
68
69
70
71
72static int apparmor_cred_prepare(struct cred *new, const struct cred *old,
73 gfp_t gfp)
74{
75
76 struct aa_task_cxt *cxt = aa_alloc_task_context(gfp);
77 if (!cxt)
78 return -ENOMEM;
79
80 aa_dup_task_context(cxt, cred_cxt(old));
81 cred_cxt(new) = cxt;
82 return 0;
83}
84
85
86
87
88static void apparmor_cred_transfer(struct cred *new, const struct cred *old)
89{
90 const struct aa_task_cxt *old_cxt = cred_cxt(old);
91 struct aa_task_cxt *new_cxt = cred_cxt(new);
92
93 aa_dup_task_context(new_cxt, old_cxt);
94}
95
96static int apparmor_ptrace_access_check(struct task_struct *child,
97 unsigned int mode)
98{
99 int error = cap_ptrace_access_check(child, mode);
100 if (error)
101 return error;
102
103 return aa_ptrace(current, child, mode);
104}
105
106static int apparmor_ptrace_traceme(struct task_struct *parent)
107{
108 int error = cap_ptrace_traceme(parent);
109 if (error)
110 return error;
111
112 return aa_ptrace(parent, current, PTRACE_MODE_ATTACH);
113}
114
115
116static int apparmor_capget(struct task_struct *target, kernel_cap_t *effective,
117 kernel_cap_t *inheritable, kernel_cap_t *permitted)
118{
119 struct aa_profile *profile;
120 const struct cred *cred;
121
122 rcu_read_lock();
123 cred = __task_cred(target);
124 profile = aa_cred_profile(cred);
125
126 *effective = cred->cap_effective;
127 *inheritable = cred->cap_inheritable;
128 *permitted = cred->cap_permitted;
129
130 if (!unconfined(profile) && !COMPLAIN_MODE(profile)) {
131 *effective = cap_intersect(*effective, profile->caps.allow);
132 *permitted = cap_intersect(*permitted, profile->caps.allow);
133 }
134 rcu_read_unlock();
135
136 return 0;
137}
138
139static int apparmor_capable(const struct cred *cred, struct user_namespace *ns,
140 int cap, int audit)
141{
142 struct aa_profile *profile;
143
144 int error = cap_capable(cred, ns, cap, audit);
145 if (!error) {
146 profile = aa_cred_profile(cred);
147 if (!unconfined(profile))
148 error = aa_capable(current, profile, cap, audit);
149 }
150 return error;
151}
152
153
154
155
156
157
158
159
160
161
162static int common_perm(int op, struct path *path, u32 mask,
163 struct path_cond *cond)
164{
165 struct aa_profile *profile;
166 int error = 0;
167
168 profile = __aa_current_profile();
169 if (!unconfined(profile))
170 error = aa_path_perm(op, profile, path, 0, mask, cond);
171
172 return error;
173}
174
175
176
177
178
179
180
181
182
183
184
185static int common_perm_dir_dentry(int op, struct path *dir,
186 struct dentry *dentry, u32 mask,
187 struct path_cond *cond)
188{
189 struct path path = { dir->mnt, dentry };
190
191 return common_perm(op, &path, mask, cond);
192}
193
194
195
196
197
198
199
200
201
202
203static int common_perm_mnt_dentry(int op, struct vfsmount *mnt,
204 struct dentry *dentry, u32 mask)
205{
206 struct path path = { mnt, dentry };
207 struct path_cond cond = { dentry->d_inode->i_uid,
208 dentry->d_inode->i_mode
209 };
210
211 return common_perm(op, &path, mask, &cond);
212}
213
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215
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217
218
219
220
221
222
223static int common_perm_rm(int op, struct path *dir,
224 struct dentry *dentry, u32 mask)
225{
226 struct inode *inode = dentry->d_inode;
227 struct path_cond cond = { };
228
229 if (!inode || !dir->mnt || !mediated_filesystem(inode))
230 return 0;
231
232 cond.uid = inode->i_uid;
233 cond.mode = inode->i_mode;
234
235 return common_perm_dir_dentry(op, dir, dentry, mask, &cond);
236}
237
238
239
240
241
242
243
244
245
246
247
248static int common_perm_create(int op, struct path *dir, struct dentry *dentry,
249 u32 mask, umode_t mode)
250{
251 struct path_cond cond = { current_fsuid(), mode };
252
253 if (!dir->mnt || !mediated_filesystem(dir->dentry->d_inode))
254 return 0;
255
256 return common_perm_dir_dentry(op, dir, dentry, mask, &cond);
257}
258
259static int apparmor_path_unlink(struct path *dir, struct dentry *dentry)
260{
261 return common_perm_rm(OP_UNLINK, dir, dentry, AA_MAY_DELETE);
262}
263
264static int apparmor_path_mkdir(struct path *dir, struct dentry *dentry,
265 umode_t mode)
266{
267 return common_perm_create(OP_MKDIR, dir, dentry, AA_MAY_CREATE,
268 S_IFDIR);
269}
270
271static int apparmor_path_rmdir(struct path *dir, struct dentry *dentry)
272{
273 return common_perm_rm(OP_RMDIR, dir, dentry, AA_MAY_DELETE);
274}
275
276static int apparmor_path_mknod(struct path *dir, struct dentry *dentry,
277 umode_t mode, unsigned int dev)
278{
279 return common_perm_create(OP_MKNOD, dir, dentry, AA_MAY_CREATE, mode);
280}
281
282static int apparmor_path_truncate(struct path *path)
283{
284 struct path_cond cond = { path->dentry->d_inode->i_uid,
285 path->dentry->d_inode->i_mode
286 };
287
288 if (!path->mnt || !mediated_filesystem(path->dentry->d_inode))
289 return 0;
290
291 return common_perm(OP_TRUNC, path, MAY_WRITE | AA_MAY_META_WRITE,
292 &cond);
293}
294
295static int apparmor_path_symlink(struct path *dir, struct dentry *dentry,
296 const char *old_name)
297{
298 return common_perm_create(OP_SYMLINK, dir, dentry, AA_MAY_CREATE,
299 S_IFLNK);
300}
301
302static int apparmor_path_link(struct dentry *old_dentry, struct path *new_dir,
303 struct dentry *new_dentry)
304{
305 struct aa_profile *profile;
306 int error = 0;
307
308 if (!mediated_filesystem(old_dentry->d_inode))
309 return 0;
310
311 profile = aa_current_profile();
312 if (!unconfined(profile))
313 error = aa_path_link(profile, old_dentry, new_dir, new_dentry);
314 return error;
315}
316
317static int apparmor_path_rename(struct path *old_dir, struct dentry *old_dentry,
318 struct path *new_dir, struct dentry *new_dentry)
319{
320 struct aa_profile *profile;
321 int error = 0;
322
323 if (!mediated_filesystem(old_dentry->d_inode))
324 return 0;
325
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
332 };
333
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,
337 &cond);
338 if (!error)
339 error = aa_path_perm(OP_RENAME_DEST, profile, &new_path,
340 0, MAY_WRITE | AA_MAY_META_WRITE |
341 AA_MAY_CREATE, &cond);
342
343 }
344 return error;
345}
346
347static int apparmor_path_chmod(struct path *path, umode_t mode)
348{
349 if (!mediated_filesystem(path->dentry->d_inode))
350 return 0;
351
352 return common_perm_mnt_dentry(OP_CHMOD, path->mnt, path->dentry, AA_MAY_CHMOD);
353}
354
355static int apparmor_path_chown(struct path *path, kuid_t uid, kgid_t gid)
356{
357 struct path_cond cond = { path->dentry->d_inode->i_uid,
358 path->dentry->d_inode->i_mode
359 };
360
361 if (!mediated_filesystem(path->dentry->d_inode))
362 return 0;
363
364 return common_perm(OP_CHOWN, path, AA_MAY_CHOWN, &cond);
365}
366
367static int apparmor_inode_getattr(struct vfsmount *mnt, struct dentry *dentry)
368{
369 if (!mediated_filesystem(dentry->d_inode))
370 return 0;
371
372 return common_perm_mnt_dentry(OP_GETATTR, mnt, dentry,
373 AA_MAY_META_READ);
374}
375
376static int apparmor_file_open(struct file *file, const struct cred *cred)
377{
378 struct aa_file_cxt *fcxt = file->f_security;
379 struct aa_profile *profile;
380 int error = 0;
381
382 if (!mediated_filesystem(file_inode(file)))
383 return 0;
384
385
386
387
388
389
390 if (current->in_execve) {
391 fcxt->allow = MAY_EXEC | MAY_READ | AA_EXEC_MMAP;
392 return 0;
393 }
394
395 profile = aa_cred_profile(cred);
396 if (!unconfined(profile)) {
397 struct inode *inode = file_inode(file);
398 struct path_cond cond = { inode->i_uid, inode->i_mode };
399
400 error = aa_path_perm(OP_OPEN, profile, &file->f_path, 0,
401 aa_map_file_to_perms(file), &cond);
402
403 fcxt->allow = aa_map_file_to_perms(file);
404 }
405
406 return error;
407}
408
409static int apparmor_file_alloc_security(struct file *file)
410{
411
412 file->f_security = aa_alloc_file_context(GFP_KERNEL);
413 if (!file->f_security)
414 return -ENOMEM;
415 return 0;
416
417}
418
419static void apparmor_file_free_security(struct file *file)
420{
421 struct aa_file_cxt *cxt = file->f_security;
422
423 aa_free_file_context(cxt);
424}
425
426static int common_file_perm(int op, struct file *file, u32 mask)
427{
428 struct aa_file_cxt *fcxt = file->f_security;
429 struct aa_profile *profile, *fprofile = aa_cred_profile(file->f_cred);
430 int error = 0;
431
432 BUG_ON(!fprofile);
433
434 if (!file->f_path.mnt ||
435 !mediated_filesystem(file_inode(file)))
436 return 0;
437
438 profile = __aa_current_profile();
439
440
441
442
443
444
445
446
447 if (!unconfined(profile) && !unconfined(fprofile) &&
448 ((fprofile != profile) || (mask & ~fcxt->allow)))
449 error = aa_file_perm(op, profile, file, mask);
450
451 return error;
452}
453
454static int apparmor_file_permission(struct file *file, int mask)
455{
456 return common_file_perm(OP_FPERM, file, mask);
457}
458
459static int apparmor_file_lock(struct file *file, unsigned int cmd)
460{
461 u32 mask = AA_MAY_LOCK;
462
463 if (cmd == F_WRLCK)
464 mask |= MAY_WRITE;
465
466 return common_file_perm(OP_FLOCK, file, mask);
467}
468
469static int common_mmap(int op, struct file *file, unsigned long prot,
470 unsigned long flags)
471{
472 int mask = 0;
473
474 if (!file || !file->f_security)
475 return 0;
476
477 if (prot & PROT_READ)
478 mask |= MAY_READ;
479
480
481
482
483 if ((prot & PROT_WRITE) && !(flags & MAP_PRIVATE))
484 mask |= MAY_WRITE;
485 if (prot & PROT_EXEC)
486 mask |= AA_EXEC_MMAP;
487
488 return common_file_perm(op, file, mask);
489}
490
491static int apparmor_mmap_file(struct file *file, unsigned long reqprot,
492 unsigned long prot, unsigned long flags)
493{
494 return common_mmap(OP_FMMAP, file, prot, flags);
495}
496
497static int apparmor_file_mprotect(struct vm_area_struct *vma,
498 unsigned long reqprot, unsigned long prot)
499{
500 return common_mmap(OP_FMPROT, vma->vm_file, prot,
501 !(vma->vm_flags & VM_SHARED) ? MAP_PRIVATE : 0);
502}
503
504static int apparmor_getprocattr(struct task_struct *task, char *name,
505 char **value)
506{
507 int error = -ENOENT;
508
509 const struct cred *cred = get_task_cred(task);
510 struct aa_task_cxt *cxt = cred_cxt(cred);
511
512 if (strcmp(name, "current") == 0)
513 error = aa_getprocattr(aa_newest_version(cxt->profile),
514 value);
515 else if (strcmp(name, "prev") == 0 && cxt->previous)
516 error = aa_getprocattr(aa_newest_version(cxt->previous),
517 value);
518 else if (strcmp(name, "exec") == 0 && cxt->onexec)
519 error = aa_getprocattr(aa_newest_version(cxt->onexec),
520 value);
521 else
522 error = -EINVAL;
523
524 put_cred(cred);
525
526 return error;
527}
528
529static int apparmor_setprocattr(struct task_struct *task, char *name,
530 void *value, size_t size)
531{
532 struct common_audit_data sa;
533 struct apparmor_audit_data aad = {0,};
534 char *command, *args = value;
535 size_t arg_size;
536 int error;
537
538 if (size == 0)
539 return -EINVAL;
540
541
542
543
544 if (args[size - 1] != '\0') {
545 if (size == PAGE_SIZE)
546 return -EINVAL;
547 args[size] = '\0';
548 }
549
550
551 if (current != task)
552 return -EACCES;
553
554 args = value;
555 args = strim(args);
556 command = strsep(&args, " ");
557 if (!args)
558 return -EINVAL;
559 args = skip_spaces(args);
560 if (!*args)
561 return -EINVAL;
562
563 arg_size = size - (args - (char *) value);
564 if (strcmp(name, "current") == 0) {
565 if (strcmp(command, "changehat") == 0) {
566 error = aa_setprocattr_changehat(args, arg_size,
567 !AA_DO_TEST);
568 } else if (strcmp(command, "permhat") == 0) {
569 error = aa_setprocattr_changehat(args, arg_size,
570 AA_DO_TEST);
571 } else if (strcmp(command, "changeprofile") == 0) {
572 error = aa_setprocattr_changeprofile(args, !AA_ONEXEC,
573 !AA_DO_TEST);
574 } else if (strcmp(command, "permprofile") == 0) {
575 error = aa_setprocattr_changeprofile(args, !AA_ONEXEC,
576 AA_DO_TEST);
577 } else
578 goto fail;
579 } else if (strcmp(name, "exec") == 0) {
580 if (strcmp(command, "exec") == 0)
581 error = aa_setprocattr_changeprofile(args, AA_ONEXEC,
582 !AA_DO_TEST);
583 else
584 goto fail;
585 } else
586
587 return -EINVAL;
588
589 if (!error)
590 error = size;
591 return error;
592
593fail:
594 sa.type = LSM_AUDIT_DATA_NONE;
595 sa.aad = &aad;
596 aad.profile = aa_current_profile();
597 aad.op = OP_SETPROCATTR;
598 aad.info = name;
599 aad.error = -EINVAL;
600 aa_audit_msg(AUDIT_APPARMOR_DENIED, &sa, NULL);
601 return -EINVAL;
602}
603
604static int apparmor_task_setrlimit(struct task_struct *task,
605 unsigned int resource, struct rlimit *new_rlim)
606{
607 struct aa_profile *profile = __aa_current_profile();
608 int error = 0;
609
610 if (!unconfined(profile))
611 error = aa_task_setrlimit(profile, task, resource, new_rlim);
612
613 return error;
614}
615
616static struct security_operations apparmor_ops = {
617 .name = "apparmor",
618
619 .ptrace_access_check = apparmor_ptrace_access_check,
620 .ptrace_traceme = apparmor_ptrace_traceme,
621 .capget = apparmor_capget,
622 .capable = apparmor_capable,
623
624 .path_link = apparmor_path_link,
625 .path_unlink = apparmor_path_unlink,
626 .path_symlink = apparmor_path_symlink,
627 .path_mkdir = apparmor_path_mkdir,
628 .path_rmdir = apparmor_path_rmdir,
629 .path_mknod = apparmor_path_mknod,
630 .path_rename = apparmor_path_rename,
631 .path_chmod = apparmor_path_chmod,
632 .path_chown = apparmor_path_chown,
633 .path_truncate = apparmor_path_truncate,
634 .inode_getattr = apparmor_inode_getattr,
635
636 .file_open = apparmor_file_open,
637 .file_permission = apparmor_file_permission,
638 .file_alloc_security = apparmor_file_alloc_security,
639 .file_free_security = apparmor_file_free_security,
640 .mmap_file = apparmor_mmap_file,
641 .mmap_addr = cap_mmap_addr,
642 .file_mprotect = apparmor_file_mprotect,
643 .file_lock = apparmor_file_lock,
644
645 .getprocattr = apparmor_getprocattr,
646 .setprocattr = apparmor_setprocattr,
647
648 .cred_alloc_blank = apparmor_cred_alloc_blank,
649 .cred_free = apparmor_cred_free,
650 .cred_prepare = apparmor_cred_prepare,
651 .cred_transfer = apparmor_cred_transfer,
652
653 .bprm_set_creds = apparmor_bprm_set_creds,
654 .bprm_committing_creds = apparmor_bprm_committing_creds,
655 .bprm_committed_creds = apparmor_bprm_committed_creds,
656 .bprm_secureexec = apparmor_bprm_secureexec,
657
658 .task_setrlimit = apparmor_task_setrlimit,
659};
660
661
662
663
664
665static int param_set_aabool(const char *val, const struct kernel_param *kp);
666static int param_get_aabool(char *buffer, const struct kernel_param *kp);
667#define param_check_aabool param_check_bool
668static struct kernel_param_ops param_ops_aabool = {
669 .set = param_set_aabool,
670 .get = param_get_aabool
671};
672
673static int param_set_aauint(const char *val, const struct kernel_param *kp);
674static int param_get_aauint(char *buffer, const struct kernel_param *kp);
675#define param_check_aauint param_check_uint
676static struct kernel_param_ops param_ops_aauint = {
677 .set = param_set_aauint,
678 .get = param_get_aauint
679};
680
681static int param_set_aalockpolicy(const char *val, const struct kernel_param *kp);
682static int param_get_aalockpolicy(char *buffer, const struct kernel_param *kp);
683#define param_check_aalockpolicy param_check_bool
684static struct kernel_param_ops param_ops_aalockpolicy = {
685 .set = param_set_aalockpolicy,
686 .get = param_get_aalockpolicy
687};
688
689static int param_set_audit(const char *val, struct kernel_param *kp);
690static int param_get_audit(char *buffer, struct kernel_param *kp);
691
692static int param_set_mode(const char *val, struct kernel_param *kp);
693static int param_get_mode(char *buffer, struct kernel_param *kp);
694
695
696
697
698
699
700enum profile_mode aa_g_profile_mode = APPARMOR_ENFORCE;
701module_param_call(mode, param_set_mode, param_get_mode,
702 &aa_g_profile_mode, S_IRUSR | S_IWUSR);
703
704
705bool aa_g_debug;
706module_param_named(debug, aa_g_debug, aabool, S_IRUSR | S_IWUSR);
707
708
709enum audit_mode aa_g_audit;
710module_param_call(audit, param_set_audit, param_get_audit,
711 &aa_g_audit, S_IRUSR | S_IWUSR);
712
713
714
715
716bool aa_g_audit_header = 1;
717module_param_named(audit_header, aa_g_audit_header, aabool,
718 S_IRUSR | S_IWUSR);
719
720
721
722
723
724bool aa_g_lock_policy;
725module_param_named(lock_policy, aa_g_lock_policy, aalockpolicy,
726 S_IRUSR | S_IWUSR);
727
728
729bool aa_g_logsyscall;
730module_param_named(logsyscall, aa_g_logsyscall, aabool, S_IRUSR | S_IWUSR);
731
732
733unsigned int aa_g_path_max = 2 * PATH_MAX;
734module_param_named(path_max, aa_g_path_max, aauint, S_IRUSR | S_IWUSR);
735
736
737
738
739bool aa_g_paranoid_load = 1;
740module_param_named(paranoid_load, aa_g_paranoid_load, aabool,
741 S_IRUSR | S_IWUSR);
742
743
744static bool apparmor_enabled = CONFIG_SECURITY_APPARMOR_BOOTPARAM_VALUE;
745module_param_named(enabled, apparmor_enabled, aabool, S_IRUSR);
746
747static int __init apparmor_enabled_setup(char *str)
748{
749 unsigned long enabled;
750 int error = strict_strtoul(str, 0, &enabled);
751 if (!error)
752 apparmor_enabled = enabled ? 1 : 0;
753 return 1;
754}
755
756__setup("apparmor=", apparmor_enabled_setup);
757
758
759static int param_set_aalockpolicy(const char *val, const struct kernel_param *kp)
760{
761 if (!capable(CAP_MAC_ADMIN))
762 return -EPERM;
763 if (aa_g_lock_policy)
764 return -EACCES;
765 return param_set_bool(val, kp);
766}
767
768static int param_get_aalockpolicy(char *buffer, const struct kernel_param *kp)
769{
770 if (!capable(CAP_MAC_ADMIN))
771 return -EPERM;
772 return param_get_bool(buffer, kp);
773}
774
775static int param_set_aabool(const char *val, const struct kernel_param *kp)
776{
777 if (!capable(CAP_MAC_ADMIN))
778 return -EPERM;
779 return param_set_bool(val, kp);
780}
781
782static int param_get_aabool(char *buffer, const struct kernel_param *kp)
783{
784 if (!capable(CAP_MAC_ADMIN))
785 return -EPERM;
786 return param_get_bool(buffer, kp);
787}
788
789static int param_set_aauint(const char *val, const struct kernel_param *kp)
790{
791 if (!capable(CAP_MAC_ADMIN))
792 return -EPERM;
793 return param_set_uint(val, kp);
794}
795
796static int param_get_aauint(char *buffer, const struct kernel_param *kp)
797{
798 if (!capable(CAP_MAC_ADMIN))
799 return -EPERM;
800 return param_get_uint(buffer, kp);
801}
802
803static int param_get_audit(char *buffer, struct kernel_param *kp)
804{
805 if (!capable(CAP_MAC_ADMIN))
806 return -EPERM;
807
808 if (!apparmor_enabled)
809 return -EINVAL;
810
811 return sprintf(buffer, "%s", audit_mode_names[aa_g_audit]);
812}
813
814static int param_set_audit(const char *val, struct kernel_param *kp)
815{
816 int i;
817 if (!capable(CAP_MAC_ADMIN))
818 return -EPERM;
819
820 if (!apparmor_enabled)
821 return -EINVAL;
822
823 if (!val)
824 return -EINVAL;
825
826 for (i = 0; i < AUDIT_MAX_INDEX; i++) {
827 if (strcmp(val, audit_mode_names[i]) == 0) {
828 aa_g_audit = i;
829 return 0;
830 }
831 }
832
833 return -EINVAL;
834}
835
836static int param_get_mode(char *buffer, struct kernel_param *kp)
837{
838 if (!capable(CAP_MAC_ADMIN))
839 return -EPERM;
840
841 if (!apparmor_enabled)
842 return -EINVAL;
843
844 return sprintf(buffer, "%s", profile_mode_names[aa_g_profile_mode]);
845}
846
847static int param_set_mode(const char *val, struct kernel_param *kp)
848{
849 int i;
850 if (!capable(CAP_MAC_ADMIN))
851 return -EPERM;
852
853 if (!apparmor_enabled)
854 return -EINVAL;
855
856 if (!val)
857 return -EINVAL;
858
859 for (i = 0; i < APPARMOR_NAMES_MAX_INDEX; i++) {
860 if (strcmp(val, profile_mode_names[i]) == 0) {
861 aa_g_profile_mode = i;
862 return 0;
863 }
864 }
865
866 return -EINVAL;
867}
868
869
870
871
872
873
874
875
876
877
878static int __init set_init_cxt(void)
879{
880 struct cred *cred = (struct cred *)current->real_cred;
881 struct aa_task_cxt *cxt;
882
883 cxt = aa_alloc_task_context(GFP_KERNEL);
884 if (!cxt)
885 return -ENOMEM;
886
887 cxt->profile = aa_get_profile(root_ns->unconfined);
888 cred_cxt(cred) = cxt;
889
890 return 0;
891}
892
893static int __init apparmor_init(void)
894{
895 int error;
896
897 if (!apparmor_enabled || !security_module_enable(&apparmor_ops)) {
898 aa_info_message("AppArmor disabled by boot time parameter");
899 apparmor_enabled = 0;
900 return 0;
901 }
902
903 error = aa_alloc_root_ns();
904 if (error) {
905 AA_ERROR("Unable to allocate default profile namespace\n");
906 goto alloc_out;
907 }
908
909 error = set_init_cxt();
910 if (error) {
911 AA_ERROR("Failed to set context on init task\n");
912 goto register_security_out;
913 }
914
915 error = register_security(&apparmor_ops);
916 if (error) {
917 struct cred *cred = (struct cred *)current->real_cred;
918 aa_free_task_context(cred_cxt(cred));
919 cred_cxt(cred) = NULL;
920 AA_ERROR("Unable to register AppArmor\n");
921 goto register_security_out;
922 }
923
924
925 apparmor_initialized = 1;
926 if (aa_g_profile_mode == APPARMOR_COMPLAIN)
927 aa_info_message("AppArmor initialized: complain mode enabled");
928 else if (aa_g_profile_mode == APPARMOR_KILL)
929 aa_info_message("AppArmor initialized: kill mode enabled");
930 else
931 aa_info_message("AppArmor initialized");
932
933 return error;
934
935register_security_out:
936 aa_free_root_ns();
937
938alloc_out:
939 aa_destroy_aafs();
940
941 apparmor_enabled = 0;
942 return error;
943}
944
945security_initcall(apparmor_init);
946