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c88d4c7b JJ |
1 | /* |
2 | * AppArmor security module | |
3 | * | |
4 | * This file contains AppArmor policy manipulation functions | |
5 | * | |
6 | * Copyright (C) 1998-2008 Novell/SUSE | |
7 | * Copyright 2009-2010 Canonical Ltd. | |
8 | * | |
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 | |
12 | * License. | |
13 | * | |
14 | * | |
15 | * AppArmor policy is based around profiles, which contain the rules a | |
16 | * task is confined by. Every task in the system has a profile attached | |
17 | * to it determined either by matching "unconfined" tasks against the | |
18 | * visible set of profiles or by following a profiles attachment rules. | |
19 | * | |
20 | * Each profile exists in a profile namespace which is a container of | |
21 | * visible profiles. Each namespace contains a special "unconfined" profile, | |
22 | * which doesn't enforce any confinement on a task beyond DAC. | |
23 | * | |
24 | * Namespace and profile names can be written together in either | |
25 | * of two syntaxes. | |
26 | * :namespace:profile - used by kernel interfaces for easy detection | |
27 | * namespace://profile - used by policy | |
28 | * | |
29 | * Profile names can not start with : or @ or ^ and may not contain \0 | |
30 | * | |
31 | * Reserved profile names | |
32 | * unconfined - special automatically generated unconfined profile | |
33 | * inherit - special name to indicate profile inheritance | |
34 | * null-XXXX-YYYY - special automatically generated learning profiles | |
35 | * | |
36 | * Namespace names may not start with / or @ and may not contain \0 or : | |
37 | * Reserved namespace names | |
38 | * user-XXXX - user defined profiles | |
39 | * | |
40 | * a // in a profile or namespace name indicates a hierarchical name with the | |
41 | * name before the // being the parent and the name after the child. | |
42 | * | |
43 | * Profile and namespace hierarchies serve two different but similar purposes. | |
44 | * The namespace contains the set of visible profiles that are considered | |
45 | * for attachment. The hierarchy of namespaces allows for virtualizing | |
46 | * the namespace so that for example a chroot can have its own set of profiles | |
47 | * which may define some local user namespaces. | |
48 | * The profile hierarchy severs two distinct purposes, | |
49 | * - it allows for sub profiles or hats, which allows an application to run | |
50 | * subprograms under its own profile with different restriction than it | |
51 | * self, and not have it use the system profile. | |
52 | * eg. if a mail program starts an editor, the policy might make the | |
53 | * restrictions tighter on the editor tighter than the mail program, | |
54 | * and definitely different than general editor restrictions | |
55 | * - it allows for binary hierarchy of profiles, so that execution history | |
56 | * is preserved. This feature isn't exploited by AppArmor reference policy | |
57 | * but is allowed. NOTE: this is currently suboptimal because profile | |
58 | * aliasing is not currently implemented so that a profile for each | |
59 | * level must be defined. | |
60 | * eg. /bin/bash///bin/ls as a name would indicate /bin/ls was started | |
61 | * from /bin/bash | |
62 | * | |
63 | * A profile or namespace name that can contain one or more // separators | |
64 | * is referred to as an hname (hierarchical). | |
65 | * eg. /bin/bash//bin/ls | |
66 | * | |
67 | * An fqname is a name that may contain both namespace and profile hnames. | |
68 | * eg. :ns:/bin/bash//bin/ls | |
69 | * | |
70 | * NOTES: | |
71 | * - locking of profile lists is currently fairly coarse. All profile | |
72 | * lists within a namespace use the namespace lock. | |
73 | * FIXME: move profile lists to using rcu_lists | |
74 | */ | |
75 | ||
76 | #include <linux/slab.h> | |
77 | #include <linux/spinlock.h> | |
78 | #include <linux/string.h> | |
80594fc2 | 79 | #include <linux/user_namespace.h> |
c88d4c7b JJ |
80 | |
81 | #include "include/apparmor.h" | |
82 | #include "include/capability.h" | |
83 | #include "include/context.h" | |
84 | #include "include/file.h" | |
85 | #include "include/ipc.h" | |
80594fc2 | 86 | #include "include/label.h" |
c88d4c7b JJ |
87 | #include "include/match.h" |
88 | #include "include/path.h" | |
89 | #include "include/policy.h" | |
90 | #include "include/policy_unpack.h" | |
91 | #include "include/resource.h" | |
c88d4c7b | 92 | |
8350b3dc | 93 | int unprivileged_userns_apparmor_policy = 1; |
c88d4c7b | 94 | |
80594fc2 JJ |
95 | /* Note: mode names must be unique in the first character because of |
96 | * modechrs used to print modes on compound labels on some interfaces | |
97 | */ | |
0d259f04 | 98 | const char *const aa_profile_mode_names[] = { |
c88d4c7b JJ |
99 | "enforce", |
100 | "complain", | |
101 | "kill", | |
03816507 | 102 | "unconfined", |
c88d4c7b JJ |
103 | }; |
104 | ||
c88d4c7b JJ |
105 | |
106 | /** | |
80594fc2 | 107 | * __add_profile - add a profiles to list and label tree |
c88d4c7b JJ |
108 | * @list: list to add it to (NOT NULL) |
109 | * @profile: the profile to add (NOT NULL) | |
110 | * | |
111 | * refcount @profile, should be put by __list_remove_profile | |
112 | * | |
113 | * Requires: namespace lock be held, or list not be shared | |
114 | */ | |
80594fc2 | 115 | static void __add_profile(struct list_head *list, struct aa_profile *profile) |
c88d4c7b | 116 | { |
80594fc2 JJ |
117 | struct aa_label *l; |
118 | ||
119 | AA_BUG(!list); | |
120 | AA_BUG(!profile); | |
121 | AA_BUG(!profile->ns); | |
122 | AA_BUG(!mutex_is_locked(&profile->ns->lock)); | |
123 | ||
01e2b670 | 124 | list_add_rcu(&profile->base.list, list); |
c88d4c7b JJ |
125 | /* get list reference */ |
126 | aa_get_profile(profile); | |
80594fc2 JJ |
127 | l = aa_label_insert(&profile->ns->labels, &profile->label); |
128 | AA_BUG(l != &profile->label); | |
129 | aa_put_label(l); | |
c88d4c7b JJ |
130 | } |
131 | ||
132 | /** | |
133 | * __list_remove_profile - remove a profile from the list it is on | |
134 | * @profile: the profile to remove (NOT NULL) | |
135 | * | |
136 | * remove a profile from the list, warning generally removal should | |
137 | * be done with __replace_profile as most profile removals are | |
138 | * replacements to the unconfined profile. | |
139 | * | |
140 | * put @profile list refcount | |
141 | * | |
142 | * Requires: namespace lock be held, or list not have been live | |
143 | */ | |
144 | static void __list_remove_profile(struct aa_profile *profile) | |
145 | { | |
80594fc2 JJ |
146 | AA_BUG(!profile); |
147 | AA_BUG(!profile->ns); | |
148 | AA_BUG(!mutex_is_locked(&profile->ns->lock)); | |
149 | ||
01e2b670 JJ |
150 | list_del_rcu(&profile->base.list); |
151 | aa_put_profile(profile); | |
c88d4c7b JJ |
152 | } |
153 | ||
80594fc2 | 154 | void __aa_profile_list_release(struct list_head *head); |
c88d4c7b JJ |
155 | |
156 | /** | |
157 | * __remove_profile - remove old profile, and children | |
158 | * @profile: profile to be replaced (NOT NULL) | |
159 | * | |
160 | * Requires: namespace list lock be held, or list not be shared | |
161 | */ | |
162 | static void __remove_profile(struct aa_profile *profile) | |
163 | { | |
80594fc2 JJ |
164 | AA_BUG(!profile); |
165 | AA_BUG(!profile->ns); | |
166 | AA_BUG(!mutex_is_locked(&profile->ns->lock)); | |
167 | ||
c88d4c7b | 168 | /* release any children lists first */ |
80594fc2 | 169 | __aa_profile_list_release(&profile->base.profiles); |
c88d4c7b | 170 | /* released by free_profile */ |
80594fc2 | 171 | aa_label_remove(&profile->label); |
0d259f04 | 172 | __aa_fs_profile_rmdir(profile); |
c88d4c7b JJ |
173 | __list_remove_profile(profile); |
174 | } | |
175 | ||
176 | /** | |
80594fc2 | 177 | * __aa_profile_list_release - remove all profiles on the list and put refs |
c88d4c7b JJ |
178 | * @head: list of profiles (NOT NULL) |
179 | * | |
180 | * Requires: namespace lock be held | |
181 | */ | |
80594fc2 | 182 | void __aa_profile_list_release(struct list_head *head) |
c88d4c7b JJ |
183 | { |
184 | struct aa_profile *profile, *tmp; | |
185 | list_for_each_entry_safe(profile, tmp, head, base.list) | |
186 | __remove_profile(profile); | |
187 | } | |
188 | ||
77b071b3 | 189 | |
c88d4c7b | 190 | /** |
8651e1d6 | 191 | * aa_free_profile - free a profile |
c88d4c7b JJ |
192 | * @profile: the profile to free (MAYBE NULL) |
193 | * | |
194 | * Free a profile, its hats and null_profile. All references to the profile, | |
195 | * its hats and null_profile must have been put. | |
196 | * | |
197 | * If the profile was referenced from a task context, free_profile() will | |
198 | * be called from an rcu callback routine, so we must not sleep here. | |
199 | */ | |
8651e1d6 | 200 | void aa_free_profile(struct aa_profile *profile) |
c88d4c7b JJ |
201 | { |
202 | AA_DEBUG("%s(%p)\n", __func__, profile); | |
203 | ||
204 | if (!profile) | |
205 | return; | |
206 | ||
c88d4c7b | 207 | /* free children profiles */ |
80594fc2 | 208 | aa_policy_destroy(&profile->base); |
01e2b670 | 209 | aa_put_profile(rcu_access_pointer(profile->parent)); |
c88d4c7b | 210 | |
80594fc2 | 211 | aa_put_ns(profile->ns); |
c88d4c7b JJ |
212 | kzfree(profile->rename); |
213 | ||
214 | aa_free_file_rules(&profile->file); | |
215 | aa_free_cap_rules(&profile->caps); | |
80594fc2 | 216 | aa_free_net_rules(&profile->net); |
c88d4c7b JJ |
217 | aa_free_rlimit_rules(&profile->rlimits); |
218 | ||
0d259f04 | 219 | kzfree(profile->dirname); |
c88d4c7b | 220 | aa_put_dfa(profile->xmatch); |
ad5ff3db | 221 | aa_put_dfa(profile->policy.dfa); |
c88d4c7b | 222 | |
5cb3e91e | 223 | kzfree(profile->hash); |
c88d4c7b JJ |
224 | kzfree(profile); |
225 | } | |
226 | ||
4da05cc0 JJ |
227 | /** |
228 | * aa_alloc_profile - allocate, initialize and return a new profile | |
229 | * @hname: name of the profile (NOT NULL) | |
80594fc2 | 230 | * @gfp: allocation type |
4da05cc0 JJ |
231 | * |
232 | * Returns: refcount profile or NULL on failure | |
233 | */ | |
80594fc2 JJ |
234 | struct aa_profile *aa_alloc_profile(const char *hname, struct aa_proxy *proxy, |
235 | gfp_t gfp) | |
4da05cc0 JJ |
236 | { |
237 | struct aa_profile *profile; | |
238 | ||
239 | /* freed by free_profile - usually through aa_put_profile */ | |
80594fc2 JJ |
240 | profile = kzalloc(sizeof(*profile) + sizeof (struct aa_profile *) * 2, |
241 | gfp); | |
4da05cc0 JJ |
242 | if (!profile) |
243 | return NULL; | |
244 | ||
80594fc2 | 245 | if (!aa_policy_init(&profile->base, NULL, hname, gfp)) |
77b071b3 | 246 | goto fail; |
80594fc2 | 247 | if (!aa_label_init(&profile->label, 1)) |
77b071b3 | 248 | goto fail; |
80594fc2 JJ |
249 | |
250 | /* update being set needed by fs interface */ | |
251 | if (!proxy) { | |
252 | proxy = aa_alloc_proxy(&profile->label, gfp); | |
253 | if (!proxy) | |
254 | goto fail; | |
255 | } else | |
256 | aa_get_proxy(proxy); | |
257 | profile->label.proxy = proxy; | |
258 | ||
259 | profile->label.hname = profile->base.hname; | |
260 | profile->label.flags |= FLAG_PROFILE; | |
261 | profile->label.vec[0] = profile; | |
4da05cc0 JJ |
262 | |
263 | /* refcount released by caller */ | |
264 | return profile; | |
77b071b3 JJ |
265 | |
266 | fail: | |
80594fc2 | 267 | aa_free_profile(profile); |
77b071b3 JJ |
268 | |
269 | return NULL; | |
4da05cc0 JJ |
270 | } |
271 | ||
272 | /** | |
80594fc2 | 273 | * aa_null_profile - create or find a null-X learning profile |
4da05cc0 JJ |
274 | * @parent: profile that caused this profile to be created (NOT NULL) |
275 | * @hat: true if the null- learning profile is a hat | |
80594fc2 JJ |
276 | * @base: name to base the null profile off of |
277 | * @gfp: type of allocation | |
4da05cc0 | 278 | * |
80594fc2 JJ |
279 | * Find/Create a null- complain mode profile used in learning mode. The |
280 | * name of the profile is unique and follows the format of parent//null-XXX. | |
281 | * where XXX is based on the @name or if that fails or is not supplied | |
282 | * a unique number | |
4da05cc0 JJ |
283 | * |
284 | * null profiles are added to the profile list but the list does not | |
285 | * hold a count on them so that they are automatically released when | |
286 | * not in use. | |
287 | * | |
288 | * Returns: new refcounted profile else NULL on failure | |
289 | */ | |
80594fc2 JJ |
290 | struct aa_profile *aa_null_profile(struct aa_profile *parent, bool hat, |
291 | const char *base, gfp_t gfp) | |
4da05cc0 | 292 | { |
80594fc2 | 293 | struct aa_profile *profile; |
4da05cc0 | 294 | char *name; |
4da05cc0 | 295 | |
80594fc2 JJ |
296 | AA_BUG(!parent); |
297 | ||
298 | if (base) { | |
299 | name = kmalloc(strlen(parent->base.hname) + 8 + strlen(base), | |
300 | gfp); | |
301 | if (name) { | |
302 | sprintf(name, "%s//null-%s", parent->base.hname, base); | |
303 | goto name; | |
304 | } | |
305 | /* fall through to try shorter uniq */ | |
306 | } | |
307 | ||
308 | name = kmalloc(strlen(parent->base.hname) + 2 + 7 + 8, gfp); | |
4da05cc0 | 309 | if (!name) |
80594fc2 JJ |
310 | return NULL; |
311 | sprintf(name, "%s//null-%x", parent->base.hname, | |
312 | atomic_inc_return(&parent->ns->uniq_null)); | |
4da05cc0 | 313 | |
80594fc2 JJ |
314 | name: |
315 | /* lookup to see if this is a dup creation */ | |
316 | profile = aa_find_child(parent, basename(name)); | |
317 | if (profile) | |
318 | goto out; | |
319 | ||
320 | profile = aa_alloc_profile(name, NULL, gfp); | |
4da05cc0 JJ |
321 | if (!profile) |
322 | goto fail; | |
323 | ||
324 | profile->mode = APPARMOR_COMPLAIN; | |
80594fc2 | 325 | profile->label.flags |= FLAG_NULL; |
4da05cc0 | 326 | if (hat) |
80594fc2 | 327 | profile->label.flags |= FLAG_HAT; |
4da05cc0 JJ |
328 | |
329 | /* released on free_profile */ | |
01e2b670 | 330 | rcu_assign_pointer(profile->parent, aa_get_profile(parent)); |
80594fc2 JJ |
331 | profile->ns = aa_get_ns(parent->ns); |
332 | profile->file.dfa = aa_get_dfa(nulldfa); | |
333 | profile->policy.dfa = aa_get_dfa(nulldfa); | |
4da05cc0 | 334 | |
01e2b670 | 335 | mutex_lock(&profile->ns->lock); |
80594fc2 | 336 | __add_profile(&parent->base.profiles, profile); |
01e2b670 | 337 | mutex_unlock(&profile->ns->lock); |
4da05cc0 JJ |
338 | |
339 | /* refcount released by caller */ | |
80594fc2 JJ |
340 | out: |
341 | kfree(name); | |
4da05cc0 JJ |
342 | return profile; |
343 | ||
344 | fail: | |
80594fc2 | 345 | aa_free_profile(profile); |
4da05cc0 JJ |
346 | return NULL; |
347 | } | |
348 | ||
80594fc2 JJ |
349 | /** |
350 | * aa_setup_default_label - create the initial default label | |
351 | */ | |
352 | struct aa_label *aa_setup_default_label(void) | |
353 | { | |
354 | struct aa_profile *profile = aa_alloc_profile("default", NULL, | |
355 | GFP_KERNEL); | |
356 | if (!profile) | |
357 | return NULL; | |
358 | ||
359 | /* the default profile pretends to be unconfined until it is replaced */ | |
360 | profile->label.flags |= FLAG_IX_ON_NAME_ERROR | FLAG_UNCONFINED; | |
361 | profile->mode = APPARMOR_UNCONFINED; | |
362 | ||
363 | profile->ns = aa_get_ns(root_ns); | |
364 | ||
365 | __add_profile(&root_ns->base.profiles, profile); | |
366 | ||
367 | return &profile->label; | |
368 | } | |
369 | ||
c88d4c7b JJ |
370 | /* TODO: profile accounting - setup in remove */ |
371 | ||
372 | /** | |
373 | * __find_child - find a profile on @head list with a name matching @name | |
374 | * @head: list to search (NOT NULL) | |
375 | * @name: name of profile (NOT NULL) | |
376 | * | |
01e2b670 | 377 | * Requires: rcu_read_lock be held |
c88d4c7b JJ |
378 | * |
379 | * Returns: unrefcounted profile ptr, or NULL if not found | |
380 | */ | |
381 | static struct aa_profile *__find_child(struct list_head *head, const char *name) | |
382 | { | |
383 | return (struct aa_profile *)__policy_find(head, name); | |
384 | } | |
385 | ||
386 | /** | |
387 | * __strn_find_child - find a profile on @head list using substring of @name | |
388 | * @head: list to search (NOT NULL) | |
389 | * @name: name of profile (NOT NULL) | |
390 | * @len: length of @name substring to match | |
391 | * | |
01e2b670 | 392 | * Requires: rcu_read_lock be held |
c88d4c7b JJ |
393 | * |
394 | * Returns: unrefcounted profile ptr, or NULL if not found | |
395 | */ | |
396 | static struct aa_profile *__strn_find_child(struct list_head *head, | |
397 | const char *name, int len) | |
398 | { | |
399 | return (struct aa_profile *)__policy_strn_find(head, name, len); | |
400 | } | |
401 | ||
402 | /** | |
403 | * aa_find_child - find a profile by @name in @parent | |
404 | * @parent: profile to search (NOT NULL) | |
405 | * @name: profile name to search for (NOT NULL) | |
406 | * | |
407 | * Returns: a refcounted profile or NULL if not found | |
408 | */ | |
409 | struct aa_profile *aa_find_child(struct aa_profile *parent, const char *name) | |
410 | { | |
411 | struct aa_profile *profile; | |
412 | ||
01e2b670 | 413 | rcu_read_lock(); |
de7c4cc9 JJ |
414 | do { |
415 | profile = __find_child(&parent->base.profiles, name); | |
416 | } while (profile && !aa_get_profile_not0(profile)); | |
01e2b670 | 417 | rcu_read_unlock(); |
c88d4c7b JJ |
418 | |
419 | /* refcount released by caller */ | |
420 | return profile; | |
421 | } | |
422 | ||
423 | /** | |
424 | * __lookup_parent - lookup the parent of a profile of name @hname | |
425 | * @ns: namespace to lookup profile in (NOT NULL) | |
426 | * @hname: hierarchical profile name to find parent of (NOT NULL) | |
427 | * | |
428 | * Lookups up the parent of a fully qualified profile name, the profile | |
429 | * that matches hname does not need to exist, in general this | |
430 | * is used to load a new profile. | |
431 | * | |
01e2b670 | 432 | * Requires: rcu_read_lock be held |
c88d4c7b JJ |
433 | * |
434 | * Returns: unrefcounted policy or NULL if not found | |
435 | */ | |
80594fc2 | 436 | static struct aa_policy *__lookup_parent(struct aa_ns *ns, const char *hname) |
c88d4c7b JJ |
437 | { |
438 | struct aa_policy *policy; | |
439 | struct aa_profile *profile = NULL; | |
440 | char *split; | |
441 | ||
442 | policy = &ns->base; | |
443 | ||
444 | for (split = strstr(hname, "//"); split;) { | |
445 | profile = __strn_find_child(&policy->profiles, hname, | |
446 | split - hname); | |
447 | if (!profile) | |
448 | return NULL; | |
449 | policy = &profile->base; | |
450 | hname = split + 2; | |
451 | split = strstr(hname, "//"); | |
452 | } | |
453 | if (!profile) | |
454 | return &ns->base; | |
455 | return &profile->base; | |
456 | } | |
457 | ||
458 | /** | |
80594fc2 | 459 | * __lookupn_profile - lookup the profile matching @hname |
c88d4c7b JJ |
460 | * @base: base list to start looking up profile name from (NOT NULL) |
461 | * @hname: hierarchical profile name (NOT NULL) | |
80594fc2 | 462 | * @n: length of @hname |
c88d4c7b | 463 | * |
01e2b670 | 464 | * Requires: rcu_read_lock be held |
c88d4c7b JJ |
465 | * |
466 | * Returns: unrefcounted profile pointer or NULL if not found | |
467 | * | |
468 | * Do a relative name lookup, recursing through profile tree. | |
469 | */ | |
80594fc2 JJ |
470 | static struct aa_profile *__lookupn_profile(struct aa_policy *base, |
471 | const char *hname, size_t n) | |
c88d4c7b JJ |
472 | { |
473 | struct aa_profile *profile = NULL; | |
80594fc2 | 474 | const char *split; |
c88d4c7b | 475 | |
80594fc2 JJ |
476 | for (split = strnstr(hname, "//", n); split; |
477 | split = strnstr(hname, "//", n)) { | |
c88d4c7b JJ |
478 | profile = __strn_find_child(&base->profiles, hname, |
479 | split - hname); | |
480 | if (!profile) | |
481 | return NULL; | |
482 | ||
483 | base = &profile->base; | |
80594fc2 | 484 | n -= split + 2 - hname; |
c88d4c7b | 485 | hname = split + 2; |
c88d4c7b JJ |
486 | } |
487 | ||
80594fc2 JJ |
488 | if (n) |
489 | return __strn_find_child(&base->profiles, hname, n); | |
490 | return NULL; | |
491 | } | |
c88d4c7b | 492 | |
80594fc2 JJ |
493 | static struct aa_profile *__lookup_profile(struct aa_policy *base, |
494 | const char *hname) | |
495 | { | |
496 | return __lookupn_profile(base, hname, strlen(hname)); | |
c88d4c7b JJ |
497 | } |
498 | ||
499 | /** | |
500 | * aa_lookup_profile - find a profile by its full or partial name | |
501 | * @ns: the namespace to start from (NOT NULL) | |
502 | * @hname: name to do lookup on. Does not contain namespace prefix (NOT NULL) | |
80594fc2 | 503 | * @n: size of @hname |
c88d4c7b JJ |
504 | * |
505 | * Returns: refcounted profile or NULL if not found | |
506 | */ | |
80594fc2 JJ |
507 | struct aa_profile *aa_lookupn_profile(struct aa_ns *ns, const char *hname, |
508 | size_t n) | |
c88d4c7b JJ |
509 | { |
510 | struct aa_profile *profile; | |
511 | ||
01e2b670 JJ |
512 | rcu_read_lock(); |
513 | do { | |
80594fc2 | 514 | profile = __lookupn_profile(&ns->base, hname, n); |
01e2b670 JJ |
515 | } while (profile && !aa_get_profile_not0(profile)); |
516 | rcu_read_unlock(); | |
c88d4c7b | 517 | |
bf83208e | 518 | /* the unconfined profile is not in the regular profile list */ |
80594fc2 | 519 | if (!profile && strncmp(hname, "unconfined", n) == 0) |
fa2ac468 | 520 | profile = aa_get_newest_profile(ns->unconfined); |
bf83208e | 521 | |
c88d4c7b JJ |
522 | /* refcount released by caller */ |
523 | return profile; | |
524 | } | |
525 | ||
80594fc2 JJ |
526 | struct aa_profile *aa_lookup_profile(struct aa_ns *ns, const char *hname) |
527 | { | |
528 | return aa_lookupn_profile(ns, hname, strlen(hname)); | |
529 | } | |
530 | ||
531 | struct aa_profile *aa_fqlookupn_profile(struct aa_label *base, | |
532 | const char *fqname, size_t n) | |
533 | { | |
534 | struct aa_profile *profile; | |
535 | struct aa_ns *ns; | |
536 | const char *name, *ns_name; | |
537 | size_t ns_len; | |
538 | ||
539 | name = aa_splitn_fqname(fqname, n, &ns_name, &ns_len); | |
540 | if (ns_name) { | |
541 | ns = aa_findn_ns(labels_ns(base), ns_name, ns_len); | |
542 | if (!ns) | |
543 | return NULL; | |
544 | } else | |
545 | ns = aa_get_ns(labels_ns(base)); | |
546 | ||
547 | if (name) | |
548 | profile = aa_lookupn_profile(ns, name, n - (name - fqname)); | |
549 | else if (ns) | |
550 | /* default profile for ns, currently unconfined */ | |
551 | profile = aa_get_newest_profile(ns->unconfined); | |
552 | else | |
553 | profile = NULL; | |
554 | aa_put_ns(ns); | |
555 | ||
556 | return profile; | |
557 | } | |
558 | ||
c88d4c7b JJ |
559 | /** |
560 | * replacement_allowed - test to see if replacement is allowed | |
561 | * @profile: profile to test if it can be replaced (MAYBE NULL) | |
562 | * @noreplace: true if replacement shouldn't be allowed but addition is okay | |
563 | * @info: Returns - info about why replacement failed (NOT NULL) | |
564 | * | |
565 | * Returns: %0 if replacement allowed else error code | |
566 | */ | |
567 | static int replacement_allowed(struct aa_profile *profile, int noreplace, | |
568 | const char **info) | |
569 | { | |
570 | if (profile) { | |
80594fc2 | 571 | if (profile->label.flags & FLAG_IMMUTIBLE) { |
c88d4c7b JJ |
572 | *info = "cannot replace immutible profile"; |
573 | return -EPERM; | |
574 | } else if (noreplace) { | |
575 | *info = "profile already exists"; | |
576 | return -EEXIST; | |
577 | } | |
578 | } | |
579 | return 0; | |
580 | } | |
581 | ||
80594fc2 JJ |
582 | /* audit callback for net specific fields */ |
583 | static void audit_cb(struct audit_buffer *ab, void *va) | |
584 | { | |
585 | struct common_audit_data *sa = va; | |
586 | ||
587 | if (aad(sa)->iface.ns) { | |
588 | audit_log_format(ab, " ns="); | |
589 | audit_log_untrustedstring(ab, aad(sa)->iface.ns); | |
590 | } | |
591 | } | |
592 | ||
c88d4c7b | 593 | /** |
80594fc2 JJ |
594 | * audit_policy - Do auditing of policy changes |
595 | * @label: label to check if it can manage policy | |
c88d4c7b | 596 | * @op: policy operation being performed |
80594fc2 | 597 | * @profile: name of profile being manipulated (NOT NULL) |
c88d4c7b JJ |
598 | * @info: any extra information to be audited (MAYBE NULL) |
599 | * @error: error code | |
600 | * | |
601 | * Returns: the error to be returned after audit is done | |
602 | */ | |
80594fc2 JJ |
603 | static int audit_policy(struct aa_label *label, const char *op, |
604 | const char *ns_name, const char *name, | |
605 | const char *info, int error) | |
c88d4c7b | 606 | { |
80594fc2 JJ |
607 | DEFINE_AUDIT_DATA(sa, LSM_AUDIT_DATA_NONE, op); |
608 | // aad(&sa)->op = op; | |
609 | aad(&sa)->iface.ns = ns_name; | |
610 | aad(&sa)->name = name; | |
611 | aad(&sa)->info = info; | |
612 | aad(&sa)->error = error; | |
613 | aad(&sa)->label = label; | |
614 | ||
615 | aa_audit_msg(AUDIT_APPARMOR_STATUS, &sa, audit_cb); | |
616 | ||
617 | return error; | |
c88d4c7b JJ |
618 | } |
619 | ||
94a9bc95 | 620 | bool policy_view_capable(void) |
58acf9d9 JJ |
621 | { |
622 | struct user_namespace *user_ns = current_user_ns(); | |
80594fc2 | 623 | struct aa_ns *ns = aa_get_current_ns(); |
58acf9d9 JJ |
624 | bool response = false; |
625 | ||
80594fc2 | 626 | if (ns_capable(user_ns, CAP_MAC_ADMIN) && |
8ccc1769 | 627 | (user_ns == &init_user_ns || |
590a154b TH |
628 | (unprivileged_userns_apparmor_policy != 0 && |
629 | user_ns->level == 1 && ns != root_ns))) | |
8ccc1769 TH |
630 | response = true; |
631 | aa_put_ns(ns); | |
632 | ||
633 | return response; | |
634 | } | |
635 | ||
94a9bc95 JJ |
636 | bool policy_admin_capable(void) |
637 | { | |
638 | return policy_view_capable() && !aa_g_lock_policy; | |
639 | } | |
640 | ||
8ccc1769 TH |
641 | bool aa_may_open_profiles(void) |
642 | { | |
643 | struct user_namespace *user_ns = current_user_ns(); | |
644 | struct aa_ns *ns = aa_get_current_ns(); | |
645 | bool root_in_user_ns = uid_eq(current_euid(), make_kuid(user_ns, 0)) || | |
646 | in_egroup_p(make_kgid(user_ns, 0)); | |
647 | bool response = false; | |
648 | ||
649 | if (root_in_user_ns && | |
80594fc2 | 650 | (user_ns == &init_user_ns || |
85692454 TH |
651 | (unprivileged_userns_apparmor_policy != 0 && |
652 | user_ns->level == 1 && ns != root_ns))) | |
58acf9d9 | 653 | response = true; |
80594fc2 | 654 | aa_put_ns(ns); |
58acf9d9 JJ |
655 | |
656 | return response; | |
657 | } | |
658 | ||
c88d4c7b JJ |
659 | /** |
660 | * aa_may_manage_policy - can the current task manage policy | |
80594fc2 | 661 | * @label: label to check if it can manage policy |
c88d4c7b JJ |
662 | * @op: the policy manipulation operation being done |
663 | * | |
80594fc2 | 664 | * Returns: 0 if the task is allowed to manipulate policy else error |
c88d4c7b | 665 | */ |
80594fc2 | 666 | int aa_may_manage_policy(struct aa_label *label, u32 mask) |
c88d4c7b | 667 | { |
80594fc2 JJ |
668 | const char *op; |
669 | ||
670 | if (mask & AA_MAY_REMOVE_POLICY) | |
671 | op = OP_PROF_RM; | |
672 | else if (mask & AA_MAY_REPLACE_POLICY) | |
673 | op = OP_PROF_REPL; | |
674 | else | |
675 | op = OP_PROF_LOAD; | |
676 | ||
c88d4c7b | 677 | /* check if loading policy is locked out */ |
80594fc2 JJ |
678 | if (aa_g_lock_policy) |
679 | return audit_policy(label, op, NULL, NULL, "policy_locked", | |
680 | -EACCES); | |
c88d4c7b | 681 | |
80594fc2 JJ |
682 | if (!policy_admin_capable()) |
683 | return audit_policy(label, op, NULL, NULL, "not policy admin", | |
684 | -EACCES); | |
c88d4c7b | 685 | |
80594fc2 JJ |
686 | /* TODO: add fine grained mediation of policy loads */ |
687 | return 0; | |
c88d4c7b JJ |
688 | } |
689 | ||
dd51c848 JJ |
690 | static struct aa_profile *__list_lookup_parent(struct list_head *lh, |
691 | struct aa_profile *profile) | |
692 | { | |
80594fc2 | 693 | const char *base = basename(profile->base.hname); |
dd51c848 JJ |
694 | long len = base - profile->base.hname; |
695 | struct aa_load_ent *ent; | |
696 | ||
697 | /* parent won't have trailing // so remove from len */ | |
698 | if (len <= 2) | |
699 | return NULL; | |
700 | len -= 2; | |
701 | ||
702 | list_for_each_entry(ent, lh, list) { | |
703 | if (ent->new == profile) | |
704 | continue; | |
705 | if (strncmp(ent->new->base.hname, profile->base.hname, len) == | |
706 | 0 && ent->new->base.hname[len] == 0) | |
707 | return ent->new; | |
708 | } | |
709 | ||
710 | return NULL; | |
711 | } | |
712 | ||
713 | /** | |
714 | * __replace_profile - replace @old with @new on a list | |
715 | * @old: profile to be replaced (NOT NULL) | |
716 | * @new: profile to replace @old with (NOT NULL) | |
717 | * | |
718 | * Will duplicate and refcount elements that @new inherits from @old | |
719 | * and will inherit @old children. | |
720 | * | |
721 | * refcount @new for list, put @old list refcount | |
722 | * | |
723 | * Requires: namespace list lock be held, or list not be shared | |
724 | */ | |
80594fc2 | 725 | static void __replace_profile(struct aa_profile *old, struct aa_profile *new) |
dd51c848 JJ |
726 | { |
727 | struct aa_profile *child, *tmp; | |
728 | ||
729 | if (!list_empty(&old->base.profiles)) { | |
730 | LIST_HEAD(lh); | |
01e2b670 | 731 | list_splice_init_rcu(&old->base.profiles, &lh, synchronize_rcu); |
dd51c848 JJ |
732 | |
733 | list_for_each_entry_safe(child, tmp, &lh, base.list) { | |
734 | struct aa_profile *p; | |
735 | ||
736 | list_del_init(&child->base.list); | |
737 | p = __find_child(&new->base.profiles, child->base.name); | |
738 | if (p) { | |
739 | /* @p replaces @child */ | |
80594fc2 | 740 | __replace_profile(child, p); |
dd51c848 JJ |
741 | continue; |
742 | } | |
743 | ||
744 | /* inherit @child and its children */ | |
745 | /* TODO: update hname of inherited children */ | |
746 | /* list refcount transferred to @new */ | |
0d259f04 | 747 | p = aa_deref_parent(child); |
01e2b670 JJ |
748 | rcu_assign_pointer(child->parent, aa_get_profile(new)); |
749 | list_add_rcu(&child->base.list, &new->base.profiles); | |
750 | aa_put_profile(p); | |
dd51c848 JJ |
751 | } |
752 | } | |
753 | ||
01e2b670 | 754 | if (!rcu_access_pointer(new->parent)) { |
0d259f04 | 755 | struct aa_profile *parent = aa_deref_parent(old); |
01e2b670 JJ |
756 | rcu_assign_pointer(new->parent, aa_get_profile(parent)); |
757 | } | |
80594fc2 JJ |
758 | aa_label_replace(&old->label, &new->label); |
759 | /* migrate dents must come after label replacement b/c update */ | |
0d259f04 | 760 | __aa_fs_profile_migrate_dents(old, new); |
dd51c848 JJ |
761 | |
762 | if (list_empty(&new->base.list)) { | |
763 | /* new is not on a list already */ | |
01e2b670 | 764 | list_replace_rcu(&old->base.list, &new->base.list); |
dd51c848 JJ |
765 | aa_get_profile(new); |
766 | aa_put_profile(old); | |
767 | } else | |
768 | __list_remove_profile(old); | |
769 | } | |
770 | ||
771 | /** | |
772 | * __lookup_replace - lookup replacement information for a profile | |
773 | * @ns - namespace the lookup occurs in | |
774 | * @hname - name of profile to lookup | |
775 | * @noreplace - true if not replacing an existing profile | |
776 | * @p - Returns: profile to be replaced | |
777 | * @info - Returns: info string on why lookup failed | |
778 | * | |
779 | * Returns: profile to replace (no ref) on success else ptr error | |
780 | */ | |
80594fc2 | 781 | static int __lookup_replace(struct aa_ns *ns, const char *hname, |
dd51c848 JJ |
782 | bool noreplace, struct aa_profile **p, |
783 | const char **info) | |
784 | { | |
785 | *p = aa_get_profile(__lookup_profile(&ns->base, hname)); | |
786 | if (*p) { | |
787 | int error = replacement_allowed(*p, noreplace, info); | |
788 | if (error) { | |
789 | *info = "profile can not be replaced"; | |
790 | return error; | |
791 | } | |
792 | } | |
793 | ||
794 | return 0; | |
795 | } | |
796 | ||
80594fc2 JJ |
797 | static void share_name(struct aa_profile *old, struct aa_profile *new) |
798 | { | |
799 | aa_put_str(new->base.hname); | |
800 | aa_get_str(old->base.hname); | |
801 | new->base.hname = old->base.hname; | |
802 | new->base.name = old->base.name; | |
803 | new->label.hname = old->label.hname; | |
804 | } | |
805 | ||
806 | /* Update to newest version of parent after previous replacements | |
807 | * Returns: unrefcount newest version of parent | |
808 | */ | |
809 | static struct aa_profile *update_to_newest_parent(struct aa_profile *new) | |
810 | { | |
811 | struct aa_profile *parent, *newest; | |
812 | parent = rcu_dereference_protected(new->parent, | |
813 | mutex_is_locked(&new->ns->lock)); | |
814 | newest = aa_get_newest_profile(parent); | |
815 | ||
816 | /* parent replaced in this atomic set? */ | |
817 | if (newest != parent) { | |
818 | aa_put_profile(parent); | |
819 | rcu_assign_pointer(new->parent, newest); | |
820 | } else | |
821 | aa_put_profile(newest); | |
822 | ||
823 | return newest; | |
824 | } | |
825 | ||
c88d4c7b JJ |
826 | /** |
827 | * aa_replace_profiles - replace profile(s) on the profile list | |
80594fc2 JJ |
828 | * @label: label that is attempting to load/replace policy |
829 | * @mask: permission mask | |
c88d4c7b JJ |
830 | * @udata: serialized data stream (NOT NULL) |
831 | * @size: size of the serialized data stream | |
c88d4c7b JJ |
832 | * |
833 | * unpack and replace a profile on the profile list and uses of that profile | |
80594fc2 | 834 | * by any aa_task_ctx. If the profile does not exist on the profile list |
c88d4c7b JJ |
835 | * it is added. |
836 | * | |
837 | * Returns: size of data consumed else error code on failure. | |
838 | */ | |
80594fc2 JJ |
839 | ssize_t aa_replace_profiles(struct aa_label *label, u32 mask, void *udata, |
840 | size_t size) | |
c88d4c7b | 841 | { |
bf15cf0c | 842 | const char *ns_name, *info = NULL; |
80594fc2 | 843 | struct aa_ns *ns = NULL; |
dd51c848 | 844 | struct aa_load_ent *ent, *tmp; |
80594fc2 JJ |
845 | const char *op = mask & AA_MAY_REPLACE_POLICY ? OP_PROF_REPL : OP_PROF_LOAD; |
846 | ssize_t count, error; | |
847 | ||
dd51c848 | 848 | LIST_HEAD(lh); |
c88d4c7b JJ |
849 | |
850 | /* released below */ | |
dd51c848 JJ |
851 | error = aa_unpack(udata, size, &lh, &ns_name); |
852 | if (error) | |
853 | goto out; | |
c88d4c7b | 854 | |
80594fc2 JJ |
855 | /* ensure that profiles are all for the same ns |
856 | * TODO: update locking to remove this constaint. All profiles in | |
857 | * the load set must succeed as a set or the load will | |
858 | * fail. Sort ent list and take ns locks in hierarchy order | |
859 | */ | |
860 | count = 0; | |
861 | list_for_each_entry(ent, &lh, list) { | |
862 | if (ns_name) { | |
863 | if (ent->ns_name && | |
864 | strcmp(ent->ns_name, ns_name) != 0) { | |
865 | info = "policy load has mixed namespaces"; | |
866 | error = -EACCES; | |
867 | goto fail; | |
868 | } | |
869 | } else if (ent->ns_name) { | |
870 | if (count) { | |
871 | info = "policy load has mixed namespaces"; | |
872 | error = -EACCES; | |
873 | goto fail; | |
874 | } | |
875 | ns_name = ent->ns_name; | |
876 | } else | |
877 | count++; | |
c88d4c7b | 878 | } |
80594fc2 JJ |
879 | if (ns_name) { |
880 | ns = aa_prepare_ns(labels_ns(label), ns_name); | |
881 | if (!ns) { | |
882 | info = "failed to prepare namespace"; | |
883 | error = -ENOMEM; | |
884 | goto fail; | |
885 | } | |
886 | } else | |
887 | ns = aa_get_ns(labels_ns(label)); | |
c88d4c7b | 888 | |
01e2b670 | 889 | mutex_lock(&ns->lock); |
dd51c848 JJ |
890 | /* setup parent and ns info */ |
891 | list_for_each_entry(ent, &lh, list) { | |
892 | struct aa_policy *policy; | |
80594fc2 JJ |
893 | |
894 | error = __lookup_replace(ns, ent->new->base.hname, | |
895 | !(mask & AA_MAY_REPLACE_POLICY), | |
dd51c848 JJ |
896 | &ent->old, &info); |
897 | if (error) | |
898 | goto fail_lock; | |
899 | ||
900 | if (ent->new->rename) { | |
901 | error = __lookup_replace(ns, ent->new->rename, | |
80594fc2 JJ |
902 | !(mask & AA_MAY_REPLACE_POLICY), |
903 | &ent->rename, &info); | |
dd51c848 JJ |
904 | if (error) |
905 | goto fail_lock; | |
c88d4c7b | 906 | } |
c88d4c7b | 907 | |
dd51c848 | 908 | /* released when @new is freed */ |
80594fc2 | 909 | ent->new->ns = aa_get_ns(ns); |
dd51c848 JJ |
910 | |
911 | if (ent->old || ent->rename) | |
912 | continue; | |
913 | ||
914 | /* no ref on policy only use inside lock */ | |
915 | policy = __lookup_parent(ns, ent->new->base.hname); | |
916 | if (!policy) { | |
917 | struct aa_profile *p; | |
918 | p = __list_lookup_parent(&lh, ent->new); | |
919 | if (!p) { | |
920 | error = -ENOENT; | |
921 | info = "parent does not exist"; | |
dd51c848 JJ |
922 | goto fail_lock; |
923 | } | |
01e2b670 JJ |
924 | rcu_assign_pointer(ent->new->parent, aa_get_profile(p)); |
925 | } else if (policy != &ns->base) { | |
dd51c848 | 926 | /* released on profile replacement or free_profile */ |
01e2b670 JJ |
927 | struct aa_profile *p = (struct aa_profile *) policy; |
928 | rcu_assign_pointer(ent->new->parent, aa_get_profile(p)); | |
929 | } | |
dd51c848 | 930 | } |
c88d4c7b | 931 | |
0d259f04 JJ |
932 | /* create new fs entries for introspection if needed */ |
933 | list_for_each_entry(ent, &lh, list) { | |
80594fc2 | 934 | if (!ent->old) { |
0d259f04 JJ |
935 | struct dentry *parent; |
936 | if (rcu_access_pointer(ent->new->parent)) { | |
937 | struct aa_profile *p; | |
938 | p = aa_deref_parent(ent->new); | |
939 | parent = prof_child_dir(p); | |
940 | } else | |
941 | parent = ns_subprofs_dir(ent->new->ns); | |
942 | error = __aa_fs_profile_mkdir(ent->new, parent); | |
943 | } | |
944 | ||
945 | if (error) { | |
80594fc2 | 946 | info = "failed to create"; |
0d259f04 JJ |
947 | goto fail_lock; |
948 | } | |
949 | } | |
950 | ||
951 | /* Done with checks that may fail - do actual replacement */ | |
dd51c848 JJ |
952 | list_for_each_entry_safe(ent, tmp, &lh, list) { |
953 | list_del_init(&ent->list); | |
954 | op = (!ent->old && !ent->rename) ? OP_PROF_LOAD : OP_PROF_REPL; | |
955 | ||
80594fc2 | 956 | audit_policy(label, op, ns_name, ent->new->base.hname, NULL, error); |
dd51c848 JJ |
957 | |
958 | if (ent->old) { | |
80594fc2 JJ |
959 | share_name(ent->old, ent->new); |
960 | __replace_profile(ent->old, ent->new); | |
961 | if (ent->rename) | |
962 | __replace_profile(ent->rename, ent->new); | |
dd51c848 | 963 | } else if (ent->rename) { |
80594fc2 JJ |
964 | /* TODO: case not actually supported yet */ |
965 | ; | |
0d259f04 | 966 | } else { |
80594fc2 JJ |
967 | struct list_head *lh; |
968 | if (rcu_access_pointer(ent->new->parent)) { | |
969 | struct aa_profile *parent; | |
970 | parent = update_to_newest_parent(ent->new); | |
971 | lh = &parent->base.profiles; | |
972 | } else | |
973 | lh = &ns->base.profiles; | |
974 | __add_profile(lh, ent->new); | |
0d259f04 | 975 | } |
dd51c848 | 976 | aa_load_ent_free(ent); |
c88d4c7b | 977 | } |
80594fc2 | 978 | __aa_labelset_update_subtree(ns); |
01e2b670 | 979 | mutex_unlock(&ns->lock); |
c88d4c7b JJ |
980 | |
981 | out: | |
80594fc2 | 982 | aa_put_ns(ns); |
dd51c848 | 983 | |
c88d4c7b JJ |
984 | if (error) |
985 | return error; | |
986 | return size; | |
987 | ||
dd51c848 | 988 | fail_lock: |
01e2b670 | 989 | mutex_unlock(&ns->lock); |
dd51c848 | 990 | |
bf15cf0c JJ |
991 | /* audit cause of failure */ |
992 | op = (!ent->old) ? OP_PROF_LOAD : OP_PROF_REPL; | |
80594fc2 JJ |
993 | fail: |
994 | audit_policy(label, op, ns_name, ent->new->base.hname, info, error); | |
bf15cf0c JJ |
995 | /* audit status that rest of profiles in the atomic set failed too */ |
996 | info = "valid profile in failed atomic policy load"; | |
997 | list_for_each_entry(tmp, &lh, list) { | |
998 | if (tmp == ent) { | |
999 | info = "unchecked profile in failed atomic policy load"; | |
1000 | /* skip entry that caused failure */ | |
1001 | continue; | |
1002 | } | |
1003 | op = (!ent->old) ? OP_PROF_LOAD : OP_PROF_REPL; | |
80594fc2 | 1004 | audit_policy(label, op, ns_name, tmp->new->base.hname, info, error); |
bf15cf0c | 1005 | } |
dd51c848 JJ |
1006 | list_for_each_entry_safe(ent, tmp, &lh, list) { |
1007 | list_del_init(&ent->list); | |
1008 | aa_load_ent_free(ent); | |
1009 | } | |
1010 | ||
c88d4c7b JJ |
1011 | goto out; |
1012 | } | |
1013 | ||
1014 | /** | |
1015 | * aa_remove_profiles - remove profile(s) from the system | |
80594fc2 | 1016 | * @label: label attempting to remove policy |
c88d4c7b JJ |
1017 | * @fqname: name of the profile or namespace to remove (NOT NULL) |
1018 | * @size: size of the name | |
1019 | * | |
1020 | * Remove a profile or sub namespace from the current namespace, so that | |
1021 | * they can not be found anymore and mark them as replaced by unconfined | |
1022 | * | |
1023 | * NOTE: removing confinement does not restore rlimits to preconfinemnet values | |
1024 | * | |
1025 | * Returns: size of data consume else error code if fails | |
1026 | */ | |
80594fc2 | 1027 | ssize_t aa_remove_profiles(struct aa_label *label, char *fqname, size_t size) |
c88d4c7b | 1028 | { |
80594fc2 | 1029 | struct aa_ns *root = NULL, *ns = NULL; |
c88d4c7b JJ |
1030 | struct aa_profile *profile = NULL; |
1031 | const char *name = fqname, *info = NULL; | |
80594fc2 | 1032 | char *ns_name = NULL; |
c88d4c7b JJ |
1033 | ssize_t error = 0; |
1034 | ||
1035 | if (*fqname == 0) { | |
1036 | info = "no profile specified"; | |
1037 | error = -ENOENT; | |
1038 | goto fail; | |
1039 | } | |
1040 | ||
80594fc2 | 1041 | root = labels_ns(label); |
c88d4c7b JJ |
1042 | |
1043 | if (fqname[0] == ':') { | |
c88d4c7b | 1044 | name = aa_split_fqname(fqname, &ns_name); |
41d1b3e8 | 1045 | /* released below */ |
80594fc2 | 1046 | ns = aa_find_ns(root, ns_name); |
41d1b3e8 JJ |
1047 | if (!ns) { |
1048 | info = "namespace does not exist"; | |
1049 | error = -ENOENT; | |
1050 | goto fail; | |
c88d4c7b JJ |
1051 | } |
1052 | } else | |
1053 | /* released below */ | |
80594fc2 | 1054 | ns = aa_get_ns(root); |
c88d4c7b | 1055 | |
c88d4c7b JJ |
1056 | if (!name) { |
1057 | /* remove namespace - can only happen if fqname[0] == ':' */ | |
01e2b670 | 1058 | mutex_lock(&ns->parent->lock); |
80594fc2 | 1059 | __aa_remove_ns(ns); |
01e2b670 | 1060 | mutex_unlock(&ns->parent->lock); |
c88d4c7b JJ |
1061 | } else { |
1062 | /* remove profile */ | |
01e2b670 | 1063 | mutex_lock(&ns->lock); |
c88d4c7b JJ |
1064 | profile = aa_get_profile(__lookup_profile(&ns->base, name)); |
1065 | if (!profile) { | |
1066 | error = -ENOENT; | |
1067 | info = "profile does not exist"; | |
1068 | goto fail_ns_lock; | |
1069 | } | |
1070 | name = profile->base.hname; | |
1071 | __remove_profile(profile); | |
80594fc2 | 1072 | __aa_labelset_update_subtree(ns); |
01e2b670 | 1073 | mutex_unlock(&ns->lock); |
c88d4c7b | 1074 | } |
c88d4c7b JJ |
1075 | |
1076 | /* don't fail removal if audit fails */ | |
80594fc2 | 1077 | (void) audit_policy(label, OP_PROF_RM, ns_name, name, info, error); |
c88d4c7b JJ |
1078 | aa_put_profile(profile); |
1079 | return size; | |
1080 | ||
1081 | fail_ns_lock: | |
01e2b670 | 1082 | mutex_unlock(&ns->lock); |
c88d4c7b JJ |
1083 | |
1084 | fail: | |
80594fc2 | 1085 | (void) audit_policy(label, OP_PROF_RM, ns_name, name, info, error); |
c88d4c7b JJ |
1086 | return error; |
1087 | } |