2 * AppArmor security module
4 * This file contains AppArmor policy manipulation functions
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 * 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.
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.
24 * Namespace and profile names can be written together in either
26 * :namespace:profile - used by kernel interfaces for easy detection
27 * namespace://profile - used by policy
29 * Profile names can not start with : or @ or ^ and may not contain \0
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
36 * Namespace names may not start with / or @ and may not contain \0 or :
37 * Reserved namespace names
38 * user-XXXX - user defined profiles
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.
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
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
67 * An fqname is a name that may contain both namespace and profile hnames.
68 * eg. :ns:/bin/bash//bin/ls
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
76 #include <linux/slab.h>
77 #include <linux/spinlock.h>
78 #include <linux/string.h>
79 #include <linux/user_namespace.h>
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"
86 #include "include/match.h"
87 #include "include/path.h"
88 #include "include/policy.h"
89 #include "include/policy_ns.h"
90 #include "include/policy_unpack.h"
91 #include "include/resource.h"
93 int unprivileged_userns_apparmor_policy = 1;
95 const char *const aa_profile_mode_names[] = {
102 /* requires profile list write lock held */
103 void __aa_update_proxy(struct aa_profile *orig, struct aa_profile *new)
105 struct aa_profile *tmp;
107 tmp = rcu_dereference_protected(orig->proxy->profile,
108 mutex_is_locked(&orig->ns->lock));
109 rcu_assign_pointer(orig->proxy->profile, aa_get_profile(new));
110 orig->flags |= PFLAG_STALE;
115 * __list_add_profile - add a profile to a list
116 * @list: list to add it to (NOT NULL)
117 * @profile: the profile to add (NOT NULL)
119 * refcount @profile, should be put by __list_remove_profile
121 * Requires: namespace lock be held, or list not be shared
123 static void __list_add_profile(struct list_head *list,
124 struct aa_profile *profile)
126 list_add_rcu(&profile->base.list, list);
127 /* get list reference */
128 aa_get_profile(profile);
132 * __list_remove_profile - remove a profile from the list it is on
133 * @profile: the profile to remove (NOT NULL)
135 * remove a profile from the list, warning generally removal should
136 * be done with __replace_profile as most profile removals are
137 * replacements to the unconfined profile.
139 * put @profile list refcount
141 * Requires: namespace lock be held, or list not have been live
143 static void __list_remove_profile(struct aa_profile *profile)
145 list_del_rcu(&profile->base.list);
146 aa_put_profile(profile);
150 * __remove_profile - remove old profile, and children
151 * @profile: profile to be replaced (NOT NULL)
153 * Requires: namespace list lock be held, or list not be shared
155 static void __remove_profile(struct aa_profile *profile)
157 /* release any children lists first */
158 __aa_profile_list_release(&profile->base.profiles);
159 /* released by free_profile */
160 __aa_update_proxy(profile, profile->ns->unconfined);
161 __aa_fs_profile_rmdir(profile);
162 __list_remove_profile(profile);
166 * __aa_profile_list_release - remove all profiles on the list and put refs
167 * @head: list of profiles (NOT NULL)
169 * Requires: namespace lock be held
171 void __aa_profile_list_release(struct list_head *head)
173 struct aa_profile *profile, *tmp;
174 list_for_each_entry_safe(profile, tmp, head, base.list)
175 __remove_profile(profile);
179 static void free_proxy(struct aa_proxy *p)
182 /* r->profile will not be updated any more as r is dead */
183 aa_put_profile(rcu_dereference_protected(p->profile, true));
189 void aa_free_proxy_kref(struct kref *kref)
191 struct aa_proxy *p = container_of(kref, struct aa_proxy, count);
197 * aa_free_data - free a data blob
201 static void aa_free_data(void *ptr, void *arg)
203 struct aa_data *data = ptr;
211 * aa_free_profile - free a profile
212 * @profile: the profile to free (MAYBE NULL)
214 * Free a profile, its hats and null_profile. All references to the profile,
215 * its hats and null_profile must have been put.
217 * If the profile was referenced from a task context, free_profile() will
218 * be called from an rcu callback routine, so we must not sleep here.
220 void aa_free_profile(struct aa_profile *profile)
222 struct rhashtable *rht;
224 AA_DEBUG("%s(%p)\n", __func__, profile);
229 /* free children profiles */
230 aa_policy_destroy(&profile->base);
231 aa_put_profile(rcu_access_pointer(profile->parent));
233 aa_put_ns(profile->ns);
234 kzfree(profile->rename);
236 aa_free_file_rules(&profile->file);
237 aa_free_cap_rules(&profile->caps);
238 aa_free_rlimit_rules(&profile->rlimits);
240 kzfree(profile->dirname);
241 aa_put_dfa(profile->xmatch);
242 aa_put_dfa(profile->policy.dfa);
243 aa_put_proxy(profile->proxy);
247 profile->data = NULL;
248 rhashtable_free_and_destroy(rht, aa_free_data, NULL);
252 kzfree(profile->hash);
253 aa_put_loaddata(profile->rawdata);
258 * aa_free_profile_rcu - free aa_profile by rcu (called by aa_free_profile_kref)
259 * @head: rcu_head callback for freeing of a profile (NOT NULL)
261 static void aa_free_profile_rcu(struct rcu_head *head)
263 struct aa_profile *p = container_of(head, struct aa_profile, rcu);
264 if (p->flags & PFLAG_NS_COUNT)
271 * aa_free_profile_kref - free aa_profile by kref (called by aa_put_profile)
272 * @kr: kref callback for freeing of a profile (NOT NULL)
274 void aa_free_profile_kref(struct kref *kref)
276 struct aa_profile *p = container_of(kref, struct aa_profile, count);
277 call_rcu(&p->rcu, aa_free_profile_rcu);
281 * aa_alloc_profile - allocate, initialize and return a new profile
282 * @hname: name of the profile (NOT NULL)
283 * @gfp: allocation type
285 * Returns: refcount profile or NULL on failure
287 struct aa_profile *aa_alloc_profile(const char *hname, gfp_t gfp)
289 struct aa_profile *profile;
291 /* freed by free_profile - usually through aa_put_profile */
292 profile = kzalloc(sizeof(*profile), gfp);
296 profile->proxy = kzalloc(sizeof(struct aa_proxy), gfp);
299 kref_init(&profile->proxy->count);
301 if (!aa_policy_init(&profile->base, NULL, hname, gfp))
303 kref_init(&profile->count);
305 /* refcount released by caller */
309 kzfree(profile->proxy);
316 * aa_new_null_profile - create or find a null-X learning profile
317 * @parent: profile that caused this profile to be created (NOT NULL)
318 * @hat: true if the null- learning profile is a hat
319 * @base: name to base the null profile off of
320 * @gfp: type of allocation
322 * Find/Create a null- complain mode profile used in learning mode. The
323 * name of the profile is unique and follows the format of parent//null-XXX.
324 * where XXX is based on the @name or if that fails or is not supplied
327 * null profiles are added to the profile list but the list does not
328 * hold a count on them so that they are automatically released when
331 * Returns: new refcounted profile else NULL on failure
333 struct aa_profile *aa_new_null_profile(struct aa_profile *parent, bool hat,
334 const char *base, gfp_t gfp)
336 struct aa_profile *profile;
342 name = kmalloc(strlen(parent->base.hname) + 8 + strlen(base),
345 sprintf(name, "%s//null-%s", parent->base.hname, base);
348 /* fall through to try shorter uniq */
351 name = kmalloc(strlen(parent->base.hname) + 2 + 7 + 8, gfp);
354 sprintf(name, "%s//null-%x", parent->base.hname,
355 atomic_inc_return(&parent->ns->uniq_null));
358 /* lookup to see if this is a dup creation */
359 profile = aa_find_child(parent, basename(name));
363 profile = aa_alloc_profile(name, gfp);
367 profile->mode = APPARMOR_COMPLAIN;
368 profile->flags |= PFLAG_NULL;
370 profile->flags |= PFLAG_HAT;
371 profile->path_flags = parent->path_flags;
373 /* released on free_profile */
374 rcu_assign_pointer(profile->parent, aa_get_profile(parent));
375 profile->ns = aa_get_ns(parent->ns);
376 profile->file.dfa = aa_get_dfa(nulldfa);
377 profile->policy.dfa = aa_get_dfa(nulldfa);
379 mutex_lock(&profile->ns->lock);
380 __list_add_profile(&parent->base.profiles, profile);
381 mutex_unlock(&profile->ns->lock);
383 /* refcount released by caller */
391 aa_free_profile(profile);
395 /* TODO: profile accounting - setup in remove */
398 * __find_child - find a profile on @head list with a name matching @name
399 * @head: list to search (NOT NULL)
400 * @name: name of profile (NOT NULL)
402 * Requires: rcu_read_lock be held
404 * Returns: unrefcounted profile ptr, or NULL if not found
406 static struct aa_profile *__find_child(struct list_head *head, const char *name)
408 return (struct aa_profile *)__policy_find(head, name);
412 * __strn_find_child - find a profile on @head list using substring of @name
413 * @head: list to search (NOT NULL)
414 * @name: name of profile (NOT NULL)
415 * @len: length of @name substring to match
417 * Requires: rcu_read_lock be held
419 * Returns: unrefcounted profile ptr, or NULL if not found
421 static struct aa_profile *__strn_find_child(struct list_head *head,
422 const char *name, int len)
424 return (struct aa_profile *)__policy_strn_find(head, name, len);
428 * aa_find_child - find a profile by @name in @parent
429 * @parent: profile to search (NOT NULL)
430 * @name: profile name to search for (NOT NULL)
432 * Returns: a refcounted profile or NULL if not found
434 struct aa_profile *aa_find_child(struct aa_profile *parent, const char *name)
436 struct aa_profile *profile;
440 profile = __find_child(&parent->base.profiles, name);
441 } while (profile && !aa_get_profile_not0(profile));
444 /* refcount released by caller */
449 * __lookup_parent - lookup the parent of a profile of name @hname
450 * @ns: namespace to lookup profile in (NOT NULL)
451 * @hname: hierarchical profile name to find parent of (NOT NULL)
453 * Lookups up the parent of a fully qualified profile name, the profile
454 * that matches hname does not need to exist, in general this
455 * is used to load a new profile.
457 * Requires: rcu_read_lock be held
459 * Returns: unrefcounted policy or NULL if not found
461 static struct aa_policy *__lookup_parent(struct aa_ns *ns,
464 struct aa_policy *policy;
465 struct aa_profile *profile = NULL;
470 for (split = strstr(hname, "//"); split;) {
471 profile = __strn_find_child(&policy->profiles, hname,
475 policy = &profile->base;
477 split = strstr(hname, "//");
481 return &profile->base;
485 * __lookupn_profile - lookup the profile matching @hname
486 * @base: base list to start looking up profile name from (NOT NULL)
487 * @hname: hierarchical profile name (NOT NULL)
488 * @n: length of @hname
490 * Requires: rcu_read_lock be held
492 * Returns: unrefcounted profile pointer or NULL if not found
494 * Do a relative name lookup, recursing through profile tree.
496 static struct aa_profile *__lookupn_profile(struct aa_policy *base,
497 const char *hname, size_t n)
499 struct aa_profile *profile = NULL;
502 for (split = strnstr(hname, "//", n); split;
503 split = strnstr(hname, "//", n)) {
504 profile = __strn_find_child(&base->profiles, hname,
509 base = &profile->base;
510 n -= split + 2 - hname;
515 return __strn_find_child(&base->profiles, hname, n);
519 static struct aa_profile *__lookup_profile(struct aa_policy *base,
522 return __lookupn_profile(base, hname, strlen(hname));
526 * aa_lookup_profile - find a profile by its full or partial name
527 * @ns: the namespace to start from (NOT NULL)
528 * @hname: name to do lookup on. Does not contain namespace prefix (NOT NULL)
531 * Returns: refcounted profile or NULL if not found
533 struct aa_profile *aa_lookupn_profile(struct aa_ns *ns, const char *hname,
536 struct aa_profile *profile;
540 profile = __lookupn_profile(&ns->base, hname, n);
541 } while (profile && !aa_get_profile_not0(profile));
544 /* the unconfined profile is not in the regular profile list */
545 if (!profile && strncmp(hname, "unconfined", n) == 0)
546 profile = aa_get_newest_profile(ns->unconfined);
548 /* refcount released by caller */
552 struct aa_profile *aa_lookup_profile(struct aa_ns *ns, const char *hname)
554 return aa_lookupn_profile(ns, hname, strlen(hname));
557 struct aa_profile *aa_fqlookupn_profile(struct aa_profile *base,
558 const char *fqname, size_t n)
560 struct aa_profile *profile;
562 const char *name, *ns_name;
565 name = aa_splitn_fqname(fqname, n, &ns_name, &ns_len);
567 ns = aa_findn_ns(base->ns, ns_name, ns_len);
571 ns = aa_get_ns(base->ns);
574 profile = aa_lookupn_profile(ns, name, n - (name - fqname));
576 /* default profile for ns, currently unconfined */
577 profile = aa_get_newest_profile(ns->unconfined);
586 * replacement_allowed - test to see if replacement is allowed
587 * @profile: profile to test if it can be replaced (MAYBE NULL)
588 * @noreplace: true if replacement shouldn't be allowed but addition is okay
589 * @info: Returns - info about why replacement failed (NOT NULL)
591 * Returns: %0 if replacement allowed else error code
593 static int replacement_allowed(struct aa_profile *profile, int noreplace,
597 if (profile->flags & PFLAG_IMMUTABLE) {
598 *info = "cannot replace immutible profile";
600 } else if (noreplace) {
601 *info = "profile already exists";
608 /* audit callback for net specific fields */
609 static void audit_cb(struct audit_buffer *ab, void *va)
611 struct common_audit_data *sa = va;
613 if (aad(sa)->iface.ns) {
614 audit_log_format(ab, " ns=");
615 audit_log_untrustedstring(ab, aad(sa)->iface.ns);
620 * aa_audit_policy - Do auditing of policy changes
621 * @profile: profile to check if it can manage policy
622 * @op: policy operation being performed
623 * @gfp: memory allocation flags
624 * @nsname: name of the ns being manipulated (MAY BE NULL)
625 * @name: name of profile being manipulated (NOT NULL)
626 * @info: any extra information to be audited (MAYBE NULL)
629 * Returns: the error to be returned after audit is done
631 static int audit_policy(struct aa_profile *profile, const char *op,
632 const char *nsname, const char *name,
633 const char *info, int error)
635 DEFINE_AUDIT_DATA(sa, LSM_AUDIT_DATA_NONE, op);
637 aad(&sa)->iface.ns = nsname;
638 aad(&sa)->name = name;
639 aad(&sa)->info = info;
640 aad(&sa)->error = error;
642 return aa_audit(AUDIT_APPARMOR_STATUS, profile, &sa, audit_cb);
646 * policy_view_capable - check if viewing policy in at @ns is allowed
647 * ns: namespace being viewed by current task (may be NULL)
648 * Returns: true if viewing policy is allowed
650 * If @ns is NULL then the namespace being viewed is assumed to be the
651 * tasks current namespace.
653 bool policy_view_capable(struct aa_ns *ns)
655 struct user_namespace *user_ns = current_user_ns();
656 struct aa_ns *view_ns = aa_get_current_ns();
657 bool root_in_user_ns = uid_eq(current_euid(), make_kuid(user_ns, 0)) ||
658 in_egroup_p(make_kgid(user_ns, 0));
659 bool response = false;
663 if (root_in_user_ns && aa_ns_visible(view_ns, ns, true) &&
664 (user_ns == &init_user_ns ||
665 (unprivileged_userns_apparmor_policy != 0 &&
666 user_ns->level == view_ns->level)))
673 bool policy_admin_capable(struct aa_ns *ns)
675 struct user_namespace *user_ns = current_user_ns();
676 bool capable = ns_capable(user_ns, CAP_MAC_ADMIN);
678 AA_DEBUG("cap_mac_admin? %d\n", capable);
679 AA_DEBUG("policy locked? %d\n", aa_g_lock_policy);
681 return policy_view_capable(ns) && capable && !aa_g_lock_policy;
685 * aa_may_manage_policy - can the current task manage policy
686 * @profile: profile to check if it can manage policy
687 * @op: the policy manipulation operation being done
689 * Returns: 0 if the task is allowed to manipulate policy else error
691 int aa_may_manage_policy(struct aa_profile *profile, struct aa_ns *ns,
694 /* check if loading policy is locked out */
695 if (aa_g_lock_policy)
696 return audit_policy(profile, op, NULL, NULL,
697 "policy_locked", -EACCES);
699 if (!policy_admin_capable(ns))
700 return audit_policy(profile, op, NULL, NULL,
701 "not policy admin", -EACCES);
703 /* TODO: add fine grained mediation of policy loads */
707 static struct aa_profile *__list_lookup_parent(struct list_head *lh,
708 struct aa_profile *profile)
710 const char *base = basename(profile->base.hname);
711 long len = base - profile->base.hname;
712 struct aa_load_ent *ent;
714 /* parent won't have trailing // so remove from len */
719 list_for_each_entry(ent, lh, list) {
720 if (ent->new == profile)
722 if (strncmp(ent->new->base.hname, profile->base.hname, len) ==
723 0 && ent->new->base.hname[len] == 0)
731 * __replace_profile - replace @old with @new on a list
732 * @old: profile to be replaced (NOT NULL)
733 * @new: profile to replace @old with (NOT NULL)
734 * @share_proxy: transfer @old->proxy to @new
736 * Will duplicate and refcount elements that @new inherits from @old
737 * and will inherit @old children.
739 * refcount @new for list, put @old list refcount
741 * Requires: namespace list lock be held, or list not be shared
743 static void __replace_profile(struct aa_profile *old, struct aa_profile *new,
746 struct aa_profile *child, *tmp;
748 if (!list_empty(&old->base.profiles)) {
750 list_splice_init_rcu(&old->base.profiles, &lh, synchronize_rcu);
752 list_for_each_entry_safe(child, tmp, &lh, base.list) {
753 struct aa_profile *p;
755 list_del_init(&child->base.list);
756 p = __find_child(&new->base.profiles, child->base.name);
758 /* @p replaces @child */
759 __replace_profile(child, p, share_proxy);
763 /* inherit @child and its children */
764 /* TODO: update hname of inherited children */
765 /* list refcount transferred to @new */
766 p = aa_deref_parent(child);
767 rcu_assign_pointer(child->parent, aa_get_profile(new));
768 list_add_rcu(&child->base.list, &new->base.profiles);
773 if (!rcu_access_pointer(new->parent)) {
774 struct aa_profile *parent = aa_deref_parent(old);
775 rcu_assign_pointer(new->parent, aa_get_profile(parent));
777 __aa_update_proxy(old, new);
779 aa_put_proxy(new->proxy);
780 new->proxy = aa_get_proxy(old->proxy);
781 } else if (!rcu_access_pointer(new->proxy->profile))
782 /* aafs interface uses proxy */
783 rcu_assign_pointer(new->proxy->profile,
784 aa_get_profile(new));
785 __aa_fs_profile_migrate_dents(old, new);
787 if (list_empty(&new->base.list)) {
788 /* new is not on a list already */
789 list_replace_rcu(&old->base.list, &new->base.list);
793 __list_remove_profile(old);
797 * __lookup_replace - lookup replacement information for a profile
798 * @ns - namespace the lookup occurs in
799 * @hname - name of profile to lookup
800 * @noreplace - true if not replacing an existing profile
801 * @p - Returns: profile to be replaced
802 * @info - Returns: info string on why lookup failed
804 * Returns: profile to replace (no ref) on success else ptr error
806 static int __lookup_replace(struct aa_ns *ns, const char *hname,
807 bool noreplace, struct aa_profile **p,
810 *p = aa_get_profile(__lookup_profile(&ns->base, hname));
812 int error = replacement_allowed(*p, noreplace, info);
814 *info = "profile can not be replaced";
823 * aa_replace_profiles - replace profile(s) on the profile list
824 * @view: namespace load is viewed from
825 * @label: label that is attempting to load/replace policy
826 * @noreplace: true if only doing addition, no replacement allowed
827 * @udata: serialized data stream (NOT NULL)
829 * unpack and replace a profile on the profile list and uses of that profile
830 * by any aa_task_ctx. If the profile does not exist on the profile list
833 * Returns: size of data consumed else error code on failure.
835 ssize_t aa_replace_profiles(struct aa_ns *view, struct aa_profile *profile,
836 bool noreplace, struct aa_loaddata *udata)
838 const char *ns_name, *info = NULL;
839 struct aa_ns *ns = NULL;
840 struct aa_load_ent *ent, *tmp;
841 const char *op = OP_PROF_REPL;
842 ssize_t count, error;
846 error = aa_unpack(udata, &lh, &ns_name);
850 /* ensure that profiles are all for the same ns
851 * TODO: update locking to remove this constaint. All profiles in
852 * the load set must succeed as a set or the load will
853 * fail. Sort ent list and take ns locks in hierarchy order
856 list_for_each_entry(ent, &lh, list) {
859 strcmp(ent->ns_name, ns_name) != 0) {
860 info = "policy load has mixed namespaces";
864 } else if (ent->ns_name) {
866 info = "policy load has mixed namespaces";
870 ns_name = ent->ns_name;
875 ns = aa_prepare_ns(view, ns_name);
877 info = "failed to prepare namespace";
883 ns = aa_get_ns(view);
885 mutex_lock(&ns->lock);
886 /* setup parent and ns info */
887 list_for_each_entry(ent, &lh, list) {
888 struct aa_policy *policy;
889 ent->new->rawdata = aa_get_loaddata(udata);
890 error = __lookup_replace(ns, ent->new->base.hname, noreplace,
895 if (ent->new->rename) {
896 error = __lookup_replace(ns, ent->new->rename,
897 noreplace, &ent->rename,
903 /* released when @new is freed */
904 ent->new->ns = aa_get_ns(ns);
906 if (ent->old || ent->rename)
909 /* no ref on policy only use inside lock */
910 policy = __lookup_parent(ns, ent->new->base.hname);
912 struct aa_profile *p;
913 p = __list_lookup_parent(&lh, ent->new);
916 info = "parent does not exist";
919 rcu_assign_pointer(ent->new->parent, aa_get_profile(p));
920 } else if (policy != &ns->base) {
921 /* released on profile replacement or free_profile */
922 struct aa_profile *p = (struct aa_profile *) policy;
923 rcu_assign_pointer(ent->new->parent, aa_get_profile(p));
927 /* create new fs entries for introspection if needed */
928 list_for_each_entry(ent, &lh, list) {
930 /* inherit old interface files */
933 TODO: support rename */
934 /* } else if (ent->rename) {
935 TODO: support rename */
937 struct dentry *parent;
938 if (rcu_access_pointer(ent->new->parent)) {
939 struct aa_profile *p;
940 p = aa_deref_parent(ent->new);
941 parent = prof_child_dir(p);
943 parent = ns_subprofs_dir(ent->new->ns);
944 error = __aa_fs_profile_mkdir(ent->new, parent);
948 info = "failed to create ";
953 /* Done with checks that may fail - do actual replacement */
954 list_for_each_entry_safe(ent, tmp, &lh, list) {
955 list_del_init(&ent->list);
956 op = (!ent->old && !ent->rename) ? OP_PROF_LOAD : OP_PROF_REPL;
958 audit_policy(profile, op, NULL, ent->new->base.hname,
962 __replace_profile(ent->old, ent->new, 1);
964 /* aafs interface uses proxy */
965 struct aa_proxy *r = ent->new->proxy;
966 rcu_assign_pointer(r->profile,
967 aa_get_profile(ent->new));
968 __replace_profile(ent->rename, ent->new, 0);
970 } else if (ent->rename) {
971 /* aafs interface uses proxy */
972 rcu_assign_pointer(ent->new->proxy->profile,
973 aa_get_profile(ent->new));
974 __replace_profile(ent->rename, ent->new, 0);
975 } else if (ent->new->parent) {
976 struct aa_profile *parent, *newest;
977 parent = aa_deref_parent(ent->new);
978 newest = aa_get_newest_profile(parent);
980 /* parent replaced in this atomic set? */
981 if (newest != parent) {
982 aa_get_profile(newest);
983 rcu_assign_pointer(ent->new->parent, newest);
984 aa_put_profile(parent);
986 /* aafs interface uses proxy */
987 rcu_assign_pointer(ent->new->proxy->profile,
988 aa_get_profile(ent->new));
989 __list_add_profile(&newest->base.profiles, ent->new);
990 aa_put_profile(newest);
992 /* aafs interface uses proxy */
993 rcu_assign_pointer(ent->new->proxy->profile,
994 aa_get_profile(ent->new));
995 __list_add_profile(&ns->base.profiles, ent->new);
997 aa_load_ent_free(ent);
999 mutex_unlock(&ns->lock);
1009 mutex_unlock(&ns->lock);
1011 /* audit cause of failure */
1012 op = (!ent->old) ? OP_PROF_LOAD : OP_PROF_REPL;
1014 audit_policy(profile, op, ns_name, ent->new->base.hname,
1016 /* audit status that rest of profiles in the atomic set failed too */
1017 info = "valid profile in failed atomic policy load";
1018 list_for_each_entry(tmp, &lh, list) {
1020 info = "unchecked profile in failed atomic policy load";
1021 /* skip entry that caused failure */
1024 op = (!ent->old) ? OP_PROF_LOAD : OP_PROF_REPL;
1025 audit_policy(profile, op, ns_name,
1026 tmp->new->base.hname, info, error);
1028 list_for_each_entry_safe(ent, tmp, &lh, list) {
1029 list_del_init(&ent->list);
1030 aa_load_ent_free(ent);
1037 * aa_remove_profiles - remove profile(s) from the system
1038 * @view: namespace the remove is being done from
1039 * @subj: profile attempting to remove policy
1040 * @fqname: name of the profile or namespace to remove (NOT NULL)
1041 * @size: size of the name
1043 * Remove a profile or sub namespace from the current namespace, so that
1044 * they can not be found anymore and mark them as replaced by unconfined
1046 * NOTE: removing confinement does not restore rlimits to preconfinemnet values
1048 * Returns: size of data consume else error code if fails
1050 ssize_t aa_remove_profiles(struct aa_ns *view, struct aa_profile *subj,
1051 char *fqname, size_t size)
1053 struct aa_ns *root = NULL, *ns = NULL;
1054 struct aa_profile *profile = NULL;
1055 const char *name = fqname, *info = NULL;
1056 char *ns_name = NULL;
1060 info = "no profile specified";
1067 if (fqname[0] == ':') {
1068 name = aa_split_fqname(fqname, &ns_name);
1069 /* released below */
1070 ns = aa_find_ns(root, ns_name);
1072 info = "namespace does not exist";
1077 /* released below */
1078 ns = aa_get_ns(root);
1081 /* remove namespace - can only happen if fqname[0] == ':' */
1082 mutex_lock(&ns->parent->lock);
1084 mutex_unlock(&ns->parent->lock);
1086 /* remove profile */
1087 mutex_lock(&ns->lock);
1088 profile = aa_get_profile(__lookup_profile(&ns->base, name));
1091 info = "profile does not exist";
1094 name = profile->base.hname;
1095 __remove_profile(profile);
1096 mutex_unlock(&ns->lock);
1099 /* don't fail removal if audit fails */
1100 (void) audit_policy(subj, OP_PROF_RM, ns_name, name, info,
1103 aa_put_profile(profile);
1107 mutex_unlock(&ns->lock);
1111 (void) audit_policy(subj, OP_PROF_RM, ns_name, name, info,