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71#include <linux/slab.h>
72#include <linux/spinlock.h>
73#include <linux/string.h>
74#include <linux/cred.h>
75#include <linux/rculist.h>
76#include <linux/user_namespace.h>
77
78#include "include/apparmor.h"
79#include "include/capability.h"
80#include "include/cred.h"
81#include "include/file.h"
82#include "include/ipc.h"
83#include "include/match.h"
84#include "include/path.h"
85#include "include/policy.h"
86#include "include/policy_ns.h"
87#include "include/policy_unpack.h"
88#include "include/resource.h"
89
90int unprivileged_userns_apparmor_policy = 1;
91
92const char *const aa_profile_mode_names[] = {
93 "enforce",
94 "complain",
95 "kill",
96 "unconfined",
97};
98
99
100
101
102
103
104
105
106
107
108
109static void __add_profile(struct list_head *list, struct aa_profile *profile)
110{
111 struct aa_label *l;
112
113 AA_BUG(!list);
114 AA_BUG(!profile);
115 AA_BUG(!profile->ns);
116 AA_BUG(!mutex_is_locked(&profile->ns->lock));
117
118 list_add_rcu(&profile->base.list, list);
119
120 aa_get_profile(profile);
121 l = aa_label_insert(&profile->ns->labels, &profile->label);
122 AA_BUG(l != &profile->label);
123 aa_put_label(l);
124}
125
126
127
128
129
130
131
132
133
134
135
136
137
138static void __list_remove_profile(struct aa_profile *profile)
139{
140 AA_BUG(!profile);
141 AA_BUG(!profile->ns);
142 AA_BUG(!mutex_is_locked(&profile->ns->lock));
143
144 list_del_rcu(&profile->base.list);
145 aa_put_profile(profile);
146}
147
148
149
150
151
152
153
154static void __remove_profile(struct aa_profile *profile)
155{
156 AA_BUG(!profile);
157 AA_BUG(!profile->ns);
158 AA_BUG(!mutex_is_locked(&profile->ns->lock));
159
160
161 __aa_profile_list_release(&profile->base.profiles);
162
163 aa_label_remove(&profile->label);
164 __aafs_profile_rmdir(profile);
165 __list_remove_profile(profile);
166}
167
168
169
170
171
172
173
174void __aa_profile_list_release(struct list_head *head)
175{
176 struct aa_profile *profile, *tmp;
177 list_for_each_entry_safe(profile, tmp, head, base.list)
178 __remove_profile(profile);
179}
180
181
182
183
184
185
186static void aa_free_data(void *ptr, void *arg)
187{
188 struct aa_data *data = ptr;
189
190 kfree_sensitive(data->data);
191 kfree_sensitive(data->key);
192 kfree_sensitive(data);
193}
194
195
196
197
198
199
200
201
202
203
204
205void aa_free_profile(struct aa_profile *profile)
206{
207 struct rhashtable *rht;
208 int i;
209
210 AA_DEBUG("%s(%p)\n", __func__, profile);
211
212 if (!profile)
213 return;
214
215
216 aa_policy_destroy(&profile->base);
217 aa_put_profile(rcu_access_pointer(profile->parent));
218
219 aa_put_ns(profile->ns);
220 kfree_sensitive(profile->rename);
221
222 aa_free_file_rules(&profile->file);
223 aa_free_cap_rules(&profile->caps);
224 aa_free_rlimit_rules(&profile->rlimits);
225
226 for (i = 0; i < profile->xattr_count; i++)
227 kfree_sensitive(profile->xattrs[i]);
228 kfree_sensitive(profile->xattrs);
229 for (i = 0; i < profile->secmark_count; i++)
230 kfree_sensitive(profile->secmark[i].label);
231 kfree_sensitive(profile->secmark);
232 kfree_sensitive(profile->dirname);
233 aa_put_dfa(profile->xmatch);
234 aa_put_dfa(profile->policy.dfa);
235
236 if (profile->data) {
237 rht = profile->data;
238 profile->data = NULL;
239 rhashtable_free_and_destroy(rht, aa_free_data, NULL);
240 kfree_sensitive(rht);
241 }
242
243 kfree_sensitive(profile->hash);
244 aa_put_loaddata(profile->rawdata);
245 aa_label_destroy(&profile->label);
246
247 kfree_sensitive(profile);
248}
249
250
251
252
253
254
255
256
257struct aa_profile *aa_alloc_profile(const char *hname, struct aa_proxy *proxy,
258 gfp_t gfp)
259{
260 struct aa_profile *profile;
261
262
263 profile = kzalloc(sizeof(*profile) + sizeof(struct aa_profile *) * 2,
264 gfp);
265 if (!profile)
266 return NULL;
267
268 if (!aa_policy_init(&profile->base, NULL, hname, gfp))
269 goto fail;
270 if (!aa_label_init(&profile->label, 1, gfp))
271 goto fail;
272
273
274 if (!proxy) {
275 proxy = aa_alloc_proxy(&profile->label, gfp);
276 if (!proxy)
277 goto fail;
278 } else
279 aa_get_proxy(proxy);
280 profile->label.proxy = proxy;
281
282 profile->label.hname = profile->base.hname;
283 profile->label.flags |= FLAG_PROFILE;
284 profile->label.vec[0] = profile;
285
286
287 return profile;
288
289fail:
290 aa_free_profile(profile);
291
292 return NULL;
293}
294
295
296
297
298
299
300
301
302
303
304
305
306
307static struct aa_profile *__strn_find_child(struct list_head *head,
308 const char *name, int len)
309{
310 return (struct aa_profile *)__policy_strn_find(head, name, len);
311}
312
313
314
315
316
317
318
319
320
321
322static struct aa_profile *__find_child(struct list_head *head, const char *name)
323{
324 return __strn_find_child(head, name, strlen(name));
325}
326
327
328
329
330
331
332
333
334struct aa_profile *aa_find_child(struct aa_profile *parent, const char *name)
335{
336 struct aa_profile *profile;
337
338 rcu_read_lock();
339 do {
340 profile = __find_child(&parent->base.profiles, name);
341 } while (profile && !aa_get_profile_not0(profile));
342 rcu_read_unlock();
343
344
345 return profile;
346}
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361static struct aa_policy *__lookup_parent(struct aa_ns *ns,
362 const char *hname)
363{
364 struct aa_policy *policy;
365 struct aa_profile *profile = NULL;
366 char *split;
367
368 policy = &ns->base;
369
370 for (split = strstr(hname, "//"); split;) {
371 profile = __strn_find_child(&policy->profiles, hname,
372 split - hname);
373 if (!profile)
374 return NULL;
375 policy = &profile->base;
376 hname = split + 2;
377 split = strstr(hname, "//");
378 }
379 if (!profile)
380 return &ns->base;
381 return &profile->base;
382}
383
384
385
386
387
388
389
390
391
392
393
394
395
396static struct aa_profile *__lookupn_profile(struct aa_policy *base,
397 const char *hname, size_t n)
398{
399 struct aa_profile *profile = NULL;
400 const char *split;
401
402 for (split = strnstr(hname, "//", n); split;
403 split = strnstr(hname, "//", n)) {
404 profile = __strn_find_child(&base->profiles, hname,
405 split - hname);
406 if (!profile)
407 return NULL;
408
409 base = &profile->base;
410 n -= split + 2 - hname;
411 hname = split + 2;
412 }
413
414 if (n)
415 return __strn_find_child(&base->profiles, hname, n);
416 return NULL;
417}
418
419static struct aa_profile *__lookup_profile(struct aa_policy *base,
420 const char *hname)
421{
422 return __lookupn_profile(base, hname, strlen(hname));
423}
424
425
426
427
428
429
430
431
432
433struct aa_profile *aa_lookupn_profile(struct aa_ns *ns, const char *hname,
434 size_t n)
435{
436 struct aa_profile *profile;
437
438 rcu_read_lock();
439 do {
440 profile = __lookupn_profile(&ns->base, hname, n);
441 } while (profile && !aa_get_profile_not0(profile));
442 rcu_read_unlock();
443
444
445 if (!profile && strncmp(hname, "unconfined", n) == 0)
446 profile = aa_get_newest_profile(ns->unconfined);
447
448
449 return profile;
450}
451
452struct aa_profile *aa_lookup_profile(struct aa_ns *ns, const char *hname)
453{
454 return aa_lookupn_profile(ns, hname, strlen(hname));
455}
456
457struct aa_profile *aa_fqlookupn_profile(struct aa_label *base,
458 const char *fqname, size_t n)
459{
460 struct aa_profile *profile;
461 struct aa_ns *ns;
462 const char *name, *ns_name;
463 size_t ns_len;
464
465 name = aa_splitn_fqname(fqname, n, &ns_name, &ns_len);
466 if (ns_name) {
467 ns = aa_lookupn_ns(labels_ns(base), ns_name, ns_len);
468 if (!ns)
469 return NULL;
470 } else
471 ns = aa_get_ns(labels_ns(base));
472
473 if (name)
474 profile = aa_lookupn_profile(ns, name, n - (name - fqname));
475 else if (ns)
476
477 profile = aa_get_newest_profile(ns->unconfined);
478 else
479 profile = NULL;
480 aa_put_ns(ns);
481
482 return profile;
483}
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503struct aa_profile *aa_new_null_profile(struct aa_profile *parent, bool hat,
504 const char *base, gfp_t gfp)
505{
506 struct aa_profile *p, *profile;
507 const char *bname;
508 char *name = NULL;
509
510 AA_BUG(!parent);
511
512 if (base) {
513 name = kmalloc(strlen(parent->base.hname) + 8 + strlen(base),
514 gfp);
515 if (name) {
516 sprintf(name, "%s//null-%s", parent->base.hname, base);
517 goto name;
518 }
519
520 }
521
522 name = kmalloc(strlen(parent->base.hname) + 2 + 7 + 8, gfp);
523 if (!name)
524 return NULL;
525 sprintf(name, "%s//null-%x", parent->base.hname,
526 atomic_inc_return(&parent->ns->uniq_null));
527
528name:
529
530 bname = basename(name);
531 profile = aa_find_child(parent, bname);
532 if (profile)
533 goto out;
534
535 profile = aa_alloc_profile(name, NULL, gfp);
536 if (!profile)
537 goto fail;
538
539 profile->mode = APPARMOR_COMPLAIN;
540 profile->label.flags |= FLAG_NULL;
541 if (hat)
542 profile->label.flags |= FLAG_HAT;
543 profile->path_flags = parent->path_flags;
544
545
546 rcu_assign_pointer(profile->parent, aa_get_profile(parent));
547 profile->ns = aa_get_ns(parent->ns);
548 profile->file.dfa = aa_get_dfa(nulldfa);
549 profile->policy.dfa = aa_get_dfa(nulldfa);
550
551 mutex_lock_nested(&profile->ns->lock, profile->ns->level);
552 p = __find_child(&parent->base.profiles, bname);
553 if (p) {
554 aa_free_profile(profile);
555 profile = aa_get_profile(p);
556 } else {
557 __add_profile(&parent->base.profiles, profile);
558 }
559 mutex_unlock(&profile->ns->lock);
560
561
562out:
563 kfree(name);
564
565 return profile;
566
567fail:
568 kfree(name);
569 aa_free_profile(profile);
570 return NULL;
571}
572
573
574
575
576
577
578
579
580
581static int replacement_allowed(struct aa_profile *profile, int noreplace,
582 const char **info)
583{
584 if (profile) {
585 if (profile->label.flags & FLAG_IMMUTIBLE) {
586 *info = "cannot replace immutable profile";
587 return -EPERM;
588 } else if (noreplace) {
589 *info = "profile already exists";
590 return -EEXIST;
591 }
592 }
593 return 0;
594}
595
596
597static void audit_cb(struct audit_buffer *ab, void *va)
598{
599 struct common_audit_data *sa = va;
600
601 if (aad(sa)->iface.ns) {
602 audit_log_format(ab, " ns=");
603 audit_log_untrustedstring(ab, aad(sa)->iface.ns);
604 }
605}
606
607
608
609
610
611
612
613
614
615
616
617
618static int audit_policy(struct aa_label *label, const char *op,
619 const char *ns_name, const char *name,
620 const char *info, int error)
621{
622 DEFINE_AUDIT_DATA(sa, LSM_AUDIT_DATA_NONE, op);
623
624 aad(&sa)->iface.ns = ns_name;
625 aad(&sa)->name = name;
626 aad(&sa)->info = info;
627 aad(&sa)->error = error;
628 aad(&sa)->label = label;
629
630 aa_audit_msg(AUDIT_APPARMOR_STATUS, &sa, audit_cb);
631
632 return error;
633}
634
635
636
637
638
639
640
641
642
643bool policy_view_capable(struct aa_ns *ns)
644{
645 struct user_namespace *user_ns = current_user_ns();
646 struct aa_ns *view_ns = aa_get_current_ns();
647 bool root_in_user_ns = uid_eq(current_euid(), make_kuid(user_ns, 0)) ||
648 in_egroup_p(make_kgid(user_ns, 0));
649 bool response = false;
650 if (!ns)
651 ns = view_ns;
652
653 if (root_in_user_ns && aa_ns_visible(view_ns, ns, true) &&
654 (user_ns == &init_user_ns ||
655 (unprivileged_userns_apparmor_policy != 0 &&
656 user_ns->level == view_ns->level)))
657 response = true;
658 aa_put_ns(view_ns);
659
660 return response;
661}
662
663bool policy_admin_capable(struct aa_ns *ns)
664{
665 struct user_namespace *user_ns = current_user_ns();
666 bool capable = ns_capable(user_ns, CAP_MAC_ADMIN);
667
668 AA_DEBUG("cap_mac_admin? %d\n", capable);
669 AA_DEBUG("policy locked? %d\n", aa_g_lock_policy);
670
671 return policy_view_capable(ns) && capable && !aa_g_lock_policy;
672}
673
674
675
676
677
678
679
680
681int aa_may_manage_policy(struct aa_label *label, struct aa_ns *ns, u32 mask)
682{
683 const char *op;
684
685 if (mask & AA_MAY_REMOVE_POLICY)
686 op = OP_PROF_RM;
687 else if (mask & AA_MAY_REPLACE_POLICY)
688 op = OP_PROF_REPL;
689 else
690 op = OP_PROF_LOAD;
691
692
693 if (aa_g_lock_policy)
694 return audit_policy(label, op, NULL, NULL, "policy_locked",
695 -EACCES);
696
697 if (!policy_admin_capable(ns))
698 return audit_policy(label, op, NULL, NULL, "not policy admin",
699 -EACCES);
700
701
702 return 0;
703}
704
705static struct aa_profile *__list_lookup_parent(struct list_head *lh,
706 struct aa_profile *profile)
707{
708 const char *base = basename(profile->base.hname);
709 long len = base - profile->base.hname;
710 struct aa_load_ent *ent;
711
712
713 if (len <= 2)
714 return NULL;
715 len -= 2;
716
717 list_for_each_entry(ent, lh, list) {
718 if (ent->new == profile)
719 continue;
720 if (strncmp(ent->new->base.hname, profile->base.hname, len) ==
721 0 && ent->new->base.hname[len] == 0)
722 return ent->new;
723 }
724
725 return NULL;
726}
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741static void __replace_profile(struct aa_profile *old, struct aa_profile *new)
742{
743 struct aa_profile *child, *tmp;
744
745 if (!list_empty(&old->base.profiles)) {
746 LIST_HEAD(lh);
747 list_splice_init_rcu(&old->base.profiles, &lh, synchronize_rcu);
748
749 list_for_each_entry_safe(child, tmp, &lh, base.list) {
750 struct aa_profile *p;
751
752 list_del_init(&child->base.list);
753 p = __find_child(&new->base.profiles, child->base.name);
754 if (p) {
755
756 __replace_profile(child, p);
757 continue;
758 }
759
760
761
762
763 p = aa_deref_parent(child);
764 rcu_assign_pointer(child->parent, aa_get_profile(new));
765 list_add_rcu(&child->base.list, &new->base.profiles);
766 aa_put_profile(p);
767 }
768 }
769
770 if (!rcu_access_pointer(new->parent)) {
771 struct aa_profile *parent = aa_deref_parent(old);
772 rcu_assign_pointer(new->parent, aa_get_profile(parent));
773 }
774 aa_label_replace(&old->label, &new->label);
775
776 __aafs_profile_migrate_dents(old, new);
777
778 if (list_empty(&new->base.list)) {
779
780 list_replace_rcu(&old->base.list, &new->base.list);
781 aa_get_profile(new);
782 aa_put_profile(old);
783 } else
784 __list_remove_profile(old);
785}
786
787
788
789
790
791
792
793
794
795
796
797static int __lookup_replace(struct aa_ns *ns, const char *hname,
798 bool noreplace, struct aa_profile **p,
799 const char **info)
800{
801 *p = aa_get_profile(__lookup_profile(&ns->base, hname));
802 if (*p) {
803 int error = replacement_allowed(*p, noreplace, info);
804 if (error) {
805 *info = "profile can not be replaced";
806 return error;
807 }
808 }
809
810 return 0;
811}
812
813static void share_name(struct aa_profile *old, struct aa_profile *new)
814{
815 aa_put_str(new->base.hname);
816 aa_get_str(old->base.hname);
817 new->base.hname = old->base.hname;
818 new->base.name = old->base.name;
819 new->label.hname = old->label.hname;
820}
821
822
823
824
825static struct aa_profile *update_to_newest_parent(struct aa_profile *new)
826{
827 struct aa_profile *parent, *newest;
828
829 parent = rcu_dereference_protected(new->parent,
830 mutex_is_locked(&new->ns->lock));
831 newest = aa_get_newest_profile(parent);
832
833
834 if (newest != parent) {
835 aa_put_profile(parent);
836 rcu_assign_pointer(new->parent, newest);
837 } else
838 aa_put_profile(newest);
839
840 return newest;
841}
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857ssize_t aa_replace_profiles(struct aa_ns *policy_ns, struct aa_label *label,
858 u32 mask, struct aa_loaddata *udata)
859{
860 const char *ns_name = NULL, *info = NULL;
861 struct aa_ns *ns = NULL;
862 struct aa_load_ent *ent, *tmp;
863 struct aa_loaddata *rawdata_ent;
864 const char *op;
865 ssize_t count, error;
866 LIST_HEAD(lh);
867
868 op = mask & AA_MAY_REPLACE_POLICY ? OP_PROF_REPL : OP_PROF_LOAD;
869 aa_get_loaddata(udata);
870
871 error = aa_unpack(udata, &lh, &ns_name);
872 if (error)
873 goto out;
874
875
876
877
878
879
880 count = 0;
881 list_for_each_entry(ent, &lh, list) {
882 if (ns_name) {
883 if (ent->ns_name &&
884 strcmp(ent->ns_name, ns_name) != 0) {
885 info = "policy load has mixed namespaces";
886 error = -EACCES;
887 goto fail;
888 }
889 } else if (ent->ns_name) {
890 if (count) {
891 info = "policy load has mixed namespaces";
892 error = -EACCES;
893 goto fail;
894 }
895 ns_name = ent->ns_name;
896 } else
897 count++;
898 }
899 if (ns_name) {
900 ns = aa_prepare_ns(policy_ns ? policy_ns : labels_ns(label),
901 ns_name);
902 if (IS_ERR(ns)) {
903 op = OP_PROF_LOAD;
904 info = "failed to prepare namespace";
905 error = PTR_ERR(ns);
906 ns = NULL;
907 ent = NULL;
908 goto fail;
909 }
910 } else
911 ns = aa_get_ns(policy_ns ? policy_ns : labels_ns(label));
912
913 mutex_lock_nested(&ns->lock, ns->level);
914
915 list_for_each_entry(rawdata_ent, &ns->rawdata_list, list) {
916 if (aa_rawdata_eq(rawdata_ent, udata)) {
917 struct aa_loaddata *tmp;
918
919 tmp = __aa_get_loaddata(rawdata_ent);
920
921 if (tmp) {
922 aa_put_loaddata(udata);
923 udata = tmp;
924 break;
925 }
926 }
927 }
928
929 list_for_each_entry(ent, &lh, list) {
930 struct aa_policy *policy;
931
932 ent->new->rawdata = aa_get_loaddata(udata);
933 error = __lookup_replace(ns, ent->new->base.hname,
934 !(mask & AA_MAY_REPLACE_POLICY),
935 &ent->old, &info);
936 if (error)
937 goto fail_lock;
938
939 if (ent->new->rename) {
940 error = __lookup_replace(ns, ent->new->rename,
941 !(mask & AA_MAY_REPLACE_POLICY),
942 &ent->rename, &info);
943 if (error)
944 goto fail_lock;
945 }
946
947
948 ent->new->ns = aa_get_ns(ns);
949
950 if (ent->old || ent->rename)
951 continue;
952
953
954 policy = __lookup_parent(ns, ent->new->base.hname);
955 if (!policy) {
956 struct aa_profile *p;
957 p = __list_lookup_parent(&lh, ent->new);
958 if (!p) {
959 error = -ENOENT;
960 info = "parent does not exist";
961 goto fail_lock;
962 }
963 rcu_assign_pointer(ent->new->parent, aa_get_profile(p));
964 } else if (policy != &ns->base) {
965
966 struct aa_profile *p = (struct aa_profile *) policy;
967 rcu_assign_pointer(ent->new->parent, aa_get_profile(p));
968 }
969 }
970
971
972 if (!udata->dents[AAFS_LOADDATA_DIR]) {
973 error = __aa_fs_create_rawdata(ns, udata);
974 if (error) {
975 info = "failed to create raw_data dir and files";
976 ent = NULL;
977 goto fail_lock;
978 }
979 }
980 list_for_each_entry(ent, &lh, list) {
981 if (!ent->old) {
982 struct dentry *parent;
983 if (rcu_access_pointer(ent->new->parent)) {
984 struct aa_profile *p;
985 p = aa_deref_parent(ent->new);
986 parent = prof_child_dir(p);
987 } else
988 parent = ns_subprofs_dir(ent->new->ns);
989 error = __aafs_profile_mkdir(ent->new, parent);
990 }
991
992 if (error) {
993 info = "failed to create";
994 goto fail_lock;
995 }
996 }
997
998
999 __aa_bump_ns_revision(ns);
1000 __aa_loaddata_update(udata, ns->revision);
1001 list_for_each_entry_safe(ent, tmp, &lh, list) {
1002 list_del_init(&ent->list);
1003 op = (!ent->old && !ent->rename) ? OP_PROF_LOAD : OP_PROF_REPL;
1004
1005 if (ent->old && ent->old->rawdata == ent->new->rawdata) {
1006
1007 audit_policy(label, op, ns_name, ent->new->base.hname,
1008 "same as current profile, skipping",
1009 error);
1010
1011 aa_put_proxy(ent->new->label.proxy);
1012 ent->new->label.proxy = NULL;
1013 goto skip;
1014 }
1015
1016
1017
1018
1019
1020 audit_policy(label, op, ns_name, ent->new->base.hname, NULL,
1021 error);
1022
1023 if (ent->old) {
1024 share_name(ent->old, ent->new);
1025 __replace_profile(ent->old, ent->new);
1026 } else {
1027 struct list_head *lh;
1028
1029 if (rcu_access_pointer(ent->new->parent)) {
1030 struct aa_profile *parent;
1031
1032 parent = update_to_newest_parent(ent->new);
1033 lh = &parent->base.profiles;
1034 } else
1035 lh = &ns->base.profiles;
1036 __add_profile(lh, ent->new);
1037 }
1038 skip:
1039 aa_load_ent_free(ent);
1040 }
1041 __aa_labelset_update_subtree(ns);
1042 mutex_unlock(&ns->lock);
1043
1044out:
1045 aa_put_ns(ns);
1046 aa_put_loaddata(udata);
1047 kfree(ns_name);
1048
1049 if (error)
1050 return error;
1051 return udata->size;
1052
1053fail_lock:
1054 mutex_unlock(&ns->lock);
1055
1056
1057 op = (ent && !ent->old) ? OP_PROF_LOAD : OP_PROF_REPL;
1058fail:
1059 audit_policy(label, op, ns_name, ent ? ent->new->base.hname : NULL,
1060 info, error);
1061
1062 info = "valid profile in failed atomic policy load";
1063 list_for_each_entry(tmp, &lh, list) {
1064 if (tmp == ent) {
1065 info = "unchecked profile in failed atomic policy load";
1066
1067 continue;
1068 }
1069 op = (!tmp->old) ? OP_PROF_LOAD : OP_PROF_REPL;
1070 audit_policy(label, op, ns_name, tmp->new->base.hname, info,
1071 error);
1072 }
1073 list_for_each_entry_safe(ent, tmp, &lh, list) {
1074 list_del_init(&ent->list);
1075 aa_load_ent_free(ent);
1076 }
1077
1078 goto out;
1079}
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095ssize_t aa_remove_profiles(struct aa_ns *policy_ns, struct aa_label *subj,
1096 char *fqname, size_t size)
1097{
1098 struct aa_ns *ns = NULL;
1099 struct aa_profile *profile = NULL;
1100 const char *name = fqname, *info = NULL;
1101 const char *ns_name = NULL;
1102 ssize_t error = 0;
1103
1104 if (*fqname == 0) {
1105 info = "no profile specified";
1106 error = -ENOENT;
1107 goto fail;
1108 }
1109
1110 if (fqname[0] == ':') {
1111 size_t ns_len;
1112
1113 name = aa_splitn_fqname(fqname, size, &ns_name, &ns_len);
1114
1115 ns = aa_lookupn_ns(policy_ns ? policy_ns : labels_ns(subj),
1116 ns_name, ns_len);
1117 if (!ns) {
1118 info = "namespace does not exist";
1119 error = -ENOENT;
1120 goto fail;
1121 }
1122 } else
1123
1124 ns = aa_get_ns(policy_ns ? policy_ns : labels_ns(subj));
1125
1126 if (!name) {
1127
1128 mutex_lock_nested(&ns->parent->lock, ns->level);
1129 __aa_bump_ns_revision(ns);
1130 __aa_remove_ns(ns);
1131 mutex_unlock(&ns->parent->lock);
1132 } else {
1133
1134 mutex_lock_nested(&ns->lock, ns->level);
1135 profile = aa_get_profile(__lookup_profile(&ns->base, name));
1136 if (!profile) {
1137 error = -ENOENT;
1138 info = "profile does not exist";
1139 goto fail_ns_lock;
1140 }
1141 name = profile->base.hname;
1142 __aa_bump_ns_revision(ns);
1143 __remove_profile(profile);
1144 __aa_labelset_update_subtree(ns);
1145 mutex_unlock(&ns->lock);
1146 }
1147
1148
1149 (void) audit_policy(subj, OP_PROF_RM, ns_name, name, info,
1150 error);
1151 aa_put_ns(ns);
1152 aa_put_profile(profile);
1153 return size;
1154
1155fail_ns_lock:
1156 mutex_unlock(&ns->lock);
1157 aa_put_ns(ns);
1158
1159fail:
1160 (void) audit_policy(subj, OP_PROF_RM, ns_name, name, info,
1161 error);
1162 return error;
1163}
1164