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/cred.h>
80 #include <linux/user_namespace.h>
82 #include "include/apparmor.h"
83 #include "include/capability.h"
84 #include "include/context.h"
85 #include "include/file.h"
86 #include "include/ipc.h"
87 #include "include/match.h"
88 #include "include/path.h"
89 #include "include/policy.h"
90 #include "include/policy_ns.h"
91 #include "include/policy_unpack.h"
92 #include "include/resource.h"
94 int unprivileged_userns_apparmor_policy = 1;
96 const char *const aa_profile_mode_names[] = {
103 /* requires profile list write lock held */
104 void __aa_update_proxy(struct aa_profile *orig, struct aa_profile *new)
106 struct aa_profile *tmp;
108 tmp = rcu_dereference_protected(orig->proxy->profile,
109 mutex_is_locked(&orig->ns->lock));
110 rcu_assign_pointer(orig->proxy->profile, aa_get_profile(new));
111 orig->flags |= PFLAG_STALE;
116 * __list_add_profile - add a profile to a list
117 * @list: list to add it to (NOT NULL)
118 * @profile: the profile to add (NOT NULL)
120 * refcount @profile, should be put by __list_remove_profile
122 * Requires: namespace lock be held, or list not be shared
124 static void __list_add_profile(struct list_head *list,
125 struct aa_profile *profile)
127 list_add_rcu(&profile->base.list, list);
128 /* get list reference */
129 aa_get_profile(profile);
133 * __list_remove_profile - remove a profile from the list it is on
134 * @profile: the profile to remove (NOT NULL)
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.
140 * put @profile list refcount
142 * Requires: namespace lock be held, or list not have been live
144 static void __list_remove_profile(struct aa_profile *profile)
146 list_del_rcu(&profile->base.list);
147 aa_put_profile(profile);
151 * __remove_profile - remove old profile, and children
152 * @profile: profile to be replaced (NOT NULL)
154 * Requires: namespace list lock be held, or list not be shared
156 static void __remove_profile(struct aa_profile *profile)
158 /* release any children lists first */
159 __aa_profile_list_release(&profile->base.profiles);
160 /* released by free_profile */
161 __aa_update_proxy(profile, profile->ns->unconfined);
162 __aa_fs_profile_rmdir(profile);
163 __list_remove_profile(profile);
167 * __aa_profile_list_release - remove all profiles on the list and put refs
168 * @head: list of profiles (NOT NULL)
170 * Requires: namespace lock be held
172 void __aa_profile_list_release(struct list_head *head)
174 struct aa_profile *profile, *tmp;
175 list_for_each_entry_safe(profile, tmp, head, base.list)
176 __remove_profile(profile);
180 static void free_proxy(struct aa_proxy *p)
183 /* r->profile will not be updated any more as r is dead */
184 aa_put_profile(rcu_dereference_protected(p->profile, true));
190 void aa_free_proxy_kref(struct kref *kref)
192 struct aa_proxy *p = container_of(kref, struct aa_proxy, count);
198 * aa_free_data - free a data blob
202 static void aa_free_data(void *ptr, void *arg)
204 struct aa_data *data = ptr;
212 * aa_free_profile - free a profile
213 * @profile: the profile to free (MAYBE NULL)
215 * Free a profile, its hats and null_profile. All references to the profile,
216 * its hats and null_profile must have been put.
218 * If the profile was referenced from a task context, free_profile() will
219 * be called from an rcu callback routine, so we must not sleep here.
221 void aa_free_profile(struct aa_profile *profile)
223 struct rhashtable *rht;
225 AA_DEBUG("%s(%p)\n", __func__, profile);
230 /* free children profiles */
231 aa_policy_destroy(&profile->base);
232 aa_put_profile(rcu_access_pointer(profile->parent));
234 aa_put_ns(profile->ns);
235 kzfree(profile->rename);
237 aa_free_file_rules(&profile->file);
238 aa_free_cap_rules(&profile->caps);
239 aa_free_rlimit_rules(&profile->rlimits);
241 kzfree(profile->dirname);
242 aa_put_dfa(profile->xmatch);
243 aa_put_dfa(profile->policy.dfa);
244 aa_put_proxy(profile->proxy);
248 profile->data = NULL;
249 rhashtable_free_and_destroy(rht, aa_free_data, NULL);
253 kzfree(profile->hash);
254 aa_put_loaddata(profile->rawdata);
259 * aa_free_profile_rcu - free aa_profile by rcu (called by aa_free_profile_kref)
260 * @head: rcu_head callback for freeing of a profile (NOT NULL)
262 static void aa_free_profile_rcu(struct rcu_head *head)
264 struct aa_profile *p = container_of(head, struct aa_profile, rcu);
265 if (p->flags & PFLAG_NS_COUNT)
272 * aa_free_profile_kref - free aa_profile by kref (called by aa_put_profile)
273 * @kr: kref callback for freeing of a profile (NOT NULL)
275 void aa_free_profile_kref(struct kref *kref)
277 struct aa_profile *p = container_of(kref, struct aa_profile, count);
278 call_rcu(&p->rcu, aa_free_profile_rcu);
282 * aa_alloc_profile - allocate, initialize and return a new profile
283 * @hname: name of the profile (NOT NULL)
284 * @gfp: allocation type
286 * Returns: refcount profile or NULL on failure
288 struct aa_profile *aa_alloc_profile(const char *hname, gfp_t gfp)
290 struct aa_profile *profile;
292 /* freed by free_profile - usually through aa_put_profile */
293 profile = kzalloc(sizeof(*profile), gfp);
297 profile->proxy = kzalloc(sizeof(struct aa_proxy), gfp);
300 kref_init(&profile->proxy->count);
302 if (!aa_policy_init(&profile->base, NULL, hname, gfp))
304 kref_init(&profile->count);
306 /* refcount released by caller */
310 kzfree(profile->proxy);
317 * aa_new_null_profile - create or find a null-X learning profile
318 * @parent: profile that caused this profile to be created (NOT NULL)
319 * @hat: true if the null- learning profile is a hat
320 * @base: name to base the null profile off of
321 * @gfp: type of allocation
323 * Find/Create a null- complain mode profile used in learning mode. The
324 * name of the profile is unique and follows the format of parent//null-XXX.
325 * where XXX is based on the @name or if that fails or is not supplied
328 * null profiles are added to the profile list but the list does not
329 * hold a count on them so that they are automatically released when
332 * Returns: new refcounted profile else NULL on failure
334 struct aa_profile *aa_new_null_profile(struct aa_profile *parent, bool hat,
335 const char *base, gfp_t gfp)
337 struct aa_profile *profile;
343 name = kmalloc(strlen(parent->base.hname) + 8 + strlen(base),
346 sprintf(name, "%s//null-%s", parent->base.hname, base);
349 /* fall through to try shorter uniq */
352 name = kmalloc(strlen(parent->base.hname) + 2 + 7 + 8, gfp);
355 sprintf(name, "%s//null-%x", parent->base.hname,
356 atomic_inc_return(&parent->ns->uniq_null));
359 /* lookup to see if this is a dup creation */
360 profile = aa_find_child(parent, basename(name));
364 profile = aa_alloc_profile(name, gfp);
368 profile->mode = APPARMOR_COMPLAIN;
369 profile->flags |= PFLAG_NULL;
371 profile->flags |= PFLAG_HAT;
372 profile->path_flags = parent->path_flags;
374 /* released on free_profile */
375 rcu_assign_pointer(profile->parent, aa_get_profile(parent));
376 profile->ns = aa_get_ns(parent->ns);
377 profile->file.dfa = aa_get_dfa(nulldfa);
378 profile->policy.dfa = aa_get_dfa(nulldfa);
380 mutex_lock(&profile->ns->lock);
381 __list_add_profile(&parent->base.profiles, profile);
382 mutex_unlock(&profile->ns->lock);
384 /* refcount released by caller */
392 aa_free_profile(profile);
396 /* TODO: profile accounting - setup in remove */
399 * __find_child - find a profile on @head list with a name matching @name
400 * @head: list to search (NOT NULL)
401 * @name: name of profile (NOT NULL)
403 * Requires: rcu_read_lock be held
405 * Returns: unrefcounted profile ptr, or NULL if not found
407 static struct aa_profile *__find_child(struct list_head *head, const char *name)
409 return (struct aa_profile *)__policy_find(head, name);
413 * __strn_find_child - find a profile on @head list using substring of @name
414 * @head: list to search (NOT NULL)
415 * @name: name of profile (NOT NULL)
416 * @len: length of @name substring to match
418 * Requires: rcu_read_lock be held
420 * Returns: unrefcounted profile ptr, or NULL if not found
422 static struct aa_profile *__strn_find_child(struct list_head *head,
423 const char *name, int len)
425 return (struct aa_profile *)__policy_strn_find(head, name, len);
429 * aa_find_child - find a profile by @name in @parent
430 * @parent: profile to search (NOT NULL)
431 * @name: profile name to search for (NOT NULL)
433 * Returns: a refcounted profile or NULL if not found
435 struct aa_profile *aa_find_child(struct aa_profile *parent, const char *name)
437 struct aa_profile *profile;
441 profile = __find_child(&parent->base.profiles, name);
442 } while (profile && !aa_get_profile_not0(profile));
445 /* refcount released by caller */
450 * __lookup_parent - lookup the parent of a profile of name @hname
451 * @ns: namespace to lookup profile in (NOT NULL)
452 * @hname: hierarchical profile name to find parent of (NOT NULL)
454 * Lookups up the parent of a fully qualified profile name, the profile
455 * that matches hname does not need to exist, in general this
456 * is used to load a new profile.
458 * Requires: rcu_read_lock be held
460 * Returns: unrefcounted policy or NULL if not found
462 static struct aa_policy *__lookup_parent(struct aa_ns *ns,
465 struct aa_policy *policy;
466 struct aa_profile *profile = NULL;
471 for (split = strstr(hname, "//"); split;) {
472 profile = __strn_find_child(&policy->profiles, hname,
476 policy = &profile->base;
478 split = strstr(hname, "//");
482 return &profile->base;
486 * __lookupn_profile - lookup the profile matching @hname
487 * @base: base list to start looking up profile name from (NOT NULL)
488 * @hname: hierarchical profile name (NOT NULL)
489 * @n: length of @hname
491 * Requires: rcu_read_lock be held
493 * Returns: unrefcounted profile pointer or NULL if not found
495 * Do a relative name lookup, recursing through profile tree.
497 static struct aa_profile *__lookupn_profile(struct aa_policy *base,
498 const char *hname, size_t n)
500 struct aa_profile *profile = NULL;
503 for (split = strnstr(hname, "//", n); split;
504 split = strnstr(hname, "//", n)) {
505 profile = __strn_find_child(&base->profiles, hname,
510 base = &profile->base;
511 n -= split + 2 - hname;
516 return __strn_find_child(&base->profiles, hname, n);
520 static struct aa_profile *__lookup_profile(struct aa_policy *base,
523 return __lookupn_profile(base, hname, strlen(hname));
527 * aa_lookup_profile - find a profile by its full or partial name
528 * @ns: the namespace to start from (NOT NULL)
529 * @hname: name to do lookup on. Does not contain namespace prefix (NOT NULL)
532 * Returns: refcounted profile or NULL if not found
534 struct aa_profile *aa_lookupn_profile(struct aa_ns *ns, const char *hname,
537 struct aa_profile *profile;
541 profile = __lookupn_profile(&ns->base, hname, n);
542 } while (profile && !aa_get_profile_not0(profile));
545 /* the unconfined profile is not in the regular profile list */
546 if (!profile && strncmp(hname, "unconfined", n) == 0)
547 profile = aa_get_newest_profile(ns->unconfined);
549 /* refcount released by caller */
553 struct aa_profile *aa_lookup_profile(struct aa_ns *ns, const char *hname)
555 return aa_lookupn_profile(ns, hname, strlen(hname));
558 struct aa_profile *aa_fqlookupn_profile(struct aa_profile *base,
559 const char *fqname, size_t n)
561 struct aa_profile *profile;
563 const char *name, *ns_name;
566 name = aa_splitn_fqname(fqname, n, &ns_name, &ns_len);
568 ns = aa_findn_ns(base->ns, ns_name, ns_len);
572 ns = aa_get_ns(base->ns);
575 profile = aa_lookupn_profile(ns, name, n - (name - fqname));
577 /* default profile for ns, currently unconfined */
578 profile = aa_get_newest_profile(ns->unconfined);
587 * replacement_allowed - test to see if replacement is allowed
588 * @profile: profile to test if it can be replaced (MAYBE NULL)
589 * @noreplace: true if replacement shouldn't be allowed but addition is okay
590 * @info: Returns - info about why replacement failed (NOT NULL)
592 * Returns: %0 if replacement allowed else error code
594 static int replacement_allowed(struct aa_profile *profile, int noreplace,
598 if (profile->flags & PFLAG_IMMUTABLE) {
599 *info = "cannot replace immutible profile";
601 } else if (noreplace) {
602 *info = "profile already exists";
609 /* audit callback for net specific fields */
610 static void audit_cb(struct audit_buffer *ab, void *va)
612 struct common_audit_data *sa = va;
614 if (aad(sa)->iface.ns) {
615 audit_log_format(ab, " ns=");
616 audit_log_untrustedstring(ab, aad(sa)->iface.ns);
621 * aa_audit_policy - Do auditing of policy changes
622 * @profile: profile to check if it can manage policy
623 * @op: policy operation being performed
624 * @gfp: memory allocation flags
625 * @nsname: name of the ns being manipulated (MAY BE NULL)
626 * @name: name of profile being manipulated (NOT NULL)
627 * @info: any extra information to be audited (MAYBE NULL)
630 * Returns: the error to be returned after audit is done
632 static int audit_policy(struct aa_profile *profile, const char *op,
633 const char *nsname, const char *name,
634 const char *info, int error)
636 DEFINE_AUDIT_DATA(sa, LSM_AUDIT_DATA_NONE, op);
638 aad(&sa)->iface.ns = nsname;
639 aad(&sa)->name = name;
640 aad(&sa)->info = info;
641 aad(&sa)->error = error;
643 return aa_audit(AUDIT_APPARMOR_STATUS, profile, &sa, audit_cb);
647 * policy_view_capable - check if viewing policy in at @ns is allowed
648 * ns: namespace being viewed by current task (may be NULL)
649 * Returns: true if viewing policy is allowed
651 * If @ns is NULL then the namespace being viewed is assumed to be the
652 * tasks current namespace.
654 bool policy_view_capable(struct aa_ns *ns)
656 struct user_namespace *user_ns = current_user_ns();
657 struct aa_ns *view_ns = aa_get_current_ns();
658 bool root_in_user_ns = uid_eq(current_euid(), make_kuid(user_ns, 0)) ||
659 in_egroup_p(make_kgid(user_ns, 0));
660 bool response = false;
664 if (root_in_user_ns && aa_ns_visible(view_ns, ns, true) &&
665 (user_ns == &init_user_ns ||
666 (unprivileged_userns_apparmor_policy != 0 &&
667 user_ns->level == view_ns->level)))
674 bool policy_admin_capable(struct aa_ns *ns)
676 struct user_namespace *user_ns = current_user_ns();
677 bool capable = ns_capable(user_ns, CAP_MAC_ADMIN);
679 AA_DEBUG("cap_mac_admin? %d\n", capable);
680 AA_DEBUG("policy locked? %d\n", aa_g_lock_policy);
682 return policy_view_capable(ns) && capable && !aa_g_lock_policy;
686 * aa_may_manage_policy - can the current task manage policy
687 * @profile: profile to check if it can manage policy
688 * @op: the policy manipulation operation being done
690 * Returns: 0 if the task is allowed to manipulate policy else error
692 int aa_may_manage_policy(struct aa_profile *profile, struct aa_ns *ns,
695 /* check if loading policy is locked out */
696 if (aa_g_lock_policy)
697 return audit_policy(profile, op, NULL, NULL,
698 "policy_locked", -EACCES);
700 if (!policy_admin_capable(ns))
701 return audit_policy(profile, op, NULL, NULL,
702 "not policy admin", -EACCES);
704 /* TODO: add fine grained mediation of policy loads */
708 static struct aa_profile *__list_lookup_parent(struct list_head *lh,
709 struct aa_profile *profile)
711 const char *base = basename(profile->base.hname);
712 long len = base - profile->base.hname;
713 struct aa_load_ent *ent;
715 /* parent won't have trailing // so remove from len */
720 list_for_each_entry(ent, lh, list) {
721 if (ent->new == profile)
723 if (strncmp(ent->new->base.hname, profile->base.hname, len) ==
724 0 && ent->new->base.hname[len] == 0)
732 * __replace_profile - replace @old with @new on a list
733 * @old: profile to be replaced (NOT NULL)
734 * @new: profile to replace @old with (NOT NULL)
735 * @share_proxy: transfer @old->proxy to @new
737 * Will duplicate and refcount elements that @new inherits from @old
738 * and will inherit @old children.
740 * refcount @new for list, put @old list refcount
742 * Requires: namespace list lock be held, or list not be shared
744 static void __replace_profile(struct aa_profile *old, struct aa_profile *new,
747 struct aa_profile *child, *tmp;
749 if (!list_empty(&old->base.profiles)) {
751 list_splice_init_rcu(&old->base.profiles, &lh, synchronize_rcu);
753 list_for_each_entry_safe(child, tmp, &lh, base.list) {
754 struct aa_profile *p;
756 list_del_init(&child->base.list);
757 p = __find_child(&new->base.profiles, child->base.name);
759 /* @p replaces @child */
760 __replace_profile(child, p, share_proxy);
764 /* inherit @child and its children */
765 /* TODO: update hname of inherited children */
766 /* list refcount transferred to @new */
767 p = aa_deref_parent(child);
768 rcu_assign_pointer(child->parent, aa_get_profile(new));
769 list_add_rcu(&child->base.list, &new->base.profiles);
774 if (!rcu_access_pointer(new->parent)) {
775 struct aa_profile *parent = aa_deref_parent(old);
776 rcu_assign_pointer(new->parent, aa_get_profile(parent));
778 __aa_update_proxy(old, new);
780 aa_put_proxy(new->proxy);
781 new->proxy = aa_get_proxy(old->proxy);
782 } else if (!rcu_access_pointer(new->proxy->profile))
783 /* aafs interface uses proxy */
784 rcu_assign_pointer(new->proxy->profile,
785 aa_get_profile(new));
786 __aa_fs_profile_migrate_dents(old, new);
788 if (list_empty(&new->base.list)) {
789 /* new is not on a list already */
790 list_replace_rcu(&old->base.list, &new->base.list);
794 __list_remove_profile(old);
798 * __lookup_replace - lookup replacement information for a profile
799 * @ns - namespace the lookup occurs in
800 * @hname - name of profile to lookup
801 * @noreplace - true if not replacing an existing profile
802 * @p - Returns: profile to be replaced
803 * @info - Returns: info string on why lookup failed
805 * Returns: profile to replace (no ref) on success else ptr error
807 static int __lookup_replace(struct aa_ns *ns, const char *hname,
808 bool noreplace, struct aa_profile **p,
811 *p = aa_get_profile(__lookup_profile(&ns->base, hname));
813 int error = replacement_allowed(*p, noreplace, info);
815 *info = "profile can not be replaced";
824 * aa_replace_profiles - replace profile(s) on the profile list
825 * @view: namespace load is viewed from
826 * @label: label that is attempting to load/replace policy
827 * @noreplace: true if only doing addition, no replacement allowed
828 * @udata: serialized data stream (NOT NULL)
830 * unpack and replace a profile on the profile list and uses of that profile
831 * by any aa_task_ctx. If the profile does not exist on the profile list
834 * Returns: size of data consumed else error code on failure.
836 ssize_t aa_replace_profiles(struct aa_ns *view, struct aa_profile *profile,
837 bool noreplace, struct aa_loaddata *udata)
839 const char *ns_name, *info = NULL;
840 struct aa_ns *ns = NULL;
841 struct aa_load_ent *ent, *tmp;
842 const char *op = OP_PROF_REPL;
843 ssize_t count, error;
847 error = aa_unpack(udata, &lh, &ns_name);
851 /* ensure that profiles are all for the same ns
852 * TODO: update locking to remove this constaint. All profiles in
853 * the load set must succeed as a set or the load will
854 * fail. Sort ent list and take ns locks in hierarchy order
857 list_for_each_entry(ent, &lh, list) {
860 strcmp(ent->ns_name, ns_name) != 0) {
861 info = "policy load has mixed namespaces";
865 } else if (ent->ns_name) {
867 info = "policy load has mixed namespaces";
871 ns_name = ent->ns_name;
876 ns = aa_prepare_ns(view, ns_name);
878 info = "failed to prepare namespace";
884 ns = aa_get_ns(view);
886 mutex_lock(&ns->lock);
887 /* setup parent and ns info */
888 list_for_each_entry(ent, &lh, list) {
889 struct aa_policy *policy;
890 ent->new->rawdata = aa_get_loaddata(udata);
891 error = __lookup_replace(ns, ent->new->base.hname, noreplace,
896 if (ent->new->rename) {
897 error = __lookup_replace(ns, ent->new->rename,
898 noreplace, &ent->rename,
904 /* released when @new is freed */
905 ent->new->ns = aa_get_ns(ns);
907 if (ent->old || ent->rename)
910 /* no ref on policy only use inside lock */
911 policy = __lookup_parent(ns, ent->new->base.hname);
913 struct aa_profile *p;
914 p = __list_lookup_parent(&lh, ent->new);
917 info = "parent does not exist";
920 rcu_assign_pointer(ent->new->parent, aa_get_profile(p));
921 } else if (policy != &ns->base) {
922 /* released on profile replacement or free_profile */
923 struct aa_profile *p = (struct aa_profile *) policy;
924 rcu_assign_pointer(ent->new->parent, aa_get_profile(p));
928 /* create new fs entries for introspection if needed */
929 list_for_each_entry(ent, &lh, list) {
931 /* inherit old interface files */
934 TODO: support rename */
935 /* } else if (ent->rename) {
936 TODO: support rename */
938 struct dentry *parent;
939 if (rcu_access_pointer(ent->new->parent)) {
940 struct aa_profile *p;
941 p = aa_deref_parent(ent->new);
942 parent = prof_child_dir(p);
944 parent = ns_subprofs_dir(ent->new->ns);
945 error = __aa_fs_profile_mkdir(ent->new, parent);
949 info = "failed to create ";
954 /* Done with checks that may fail - do actual replacement */
955 list_for_each_entry_safe(ent, tmp, &lh, list) {
956 list_del_init(&ent->list);
957 op = (!ent->old && !ent->rename) ? OP_PROF_LOAD : OP_PROF_REPL;
959 audit_policy(profile, op, NULL, ent->new->base.hname,
963 __replace_profile(ent->old, ent->new, 1);
965 /* aafs interface uses proxy */
966 struct aa_proxy *r = ent->new->proxy;
967 rcu_assign_pointer(r->profile,
968 aa_get_profile(ent->new));
969 __replace_profile(ent->rename, ent->new, 0);
971 } else if (ent->rename) {
972 /* aafs interface uses proxy */
973 rcu_assign_pointer(ent->new->proxy->profile,
974 aa_get_profile(ent->new));
975 __replace_profile(ent->rename, ent->new, 0);
976 } else if (ent->new->parent) {
977 struct aa_profile *parent, *newest;
978 parent = aa_deref_parent(ent->new);
979 newest = aa_get_newest_profile(parent);
981 /* parent replaced in this atomic set? */
982 if (newest != parent) {
983 aa_get_profile(newest);
984 rcu_assign_pointer(ent->new->parent, newest);
985 aa_put_profile(parent);
987 /* aafs interface uses proxy */
988 rcu_assign_pointer(ent->new->proxy->profile,
989 aa_get_profile(ent->new));
990 __list_add_profile(&newest->base.profiles, ent->new);
991 aa_put_profile(newest);
993 /* aafs interface uses proxy */
994 rcu_assign_pointer(ent->new->proxy->profile,
995 aa_get_profile(ent->new));
996 __list_add_profile(&ns->base.profiles, ent->new);
998 aa_load_ent_free(ent);
1000 mutex_unlock(&ns->lock);
1010 mutex_unlock(&ns->lock);
1012 /* audit cause of failure */
1013 op = (!ent->old) ? OP_PROF_LOAD : OP_PROF_REPL;
1015 audit_policy(profile, op, ns_name, ent->new->base.hname,
1017 /* audit status that rest of profiles in the atomic set failed too */
1018 info = "valid profile in failed atomic policy load";
1019 list_for_each_entry(tmp, &lh, list) {
1021 info = "unchecked profile in failed atomic policy load";
1022 /* skip entry that caused failure */
1025 op = (!ent->old) ? OP_PROF_LOAD : OP_PROF_REPL;
1026 audit_policy(profile, op, ns_name,
1027 tmp->new->base.hname, info, error);
1029 list_for_each_entry_safe(ent, tmp, &lh, list) {
1030 list_del_init(&ent->list);
1031 aa_load_ent_free(ent);
1038 * aa_remove_profiles - remove profile(s) from the system
1039 * @view: namespace the remove is being done from
1040 * @subj: profile attempting to remove policy
1041 * @fqname: name of the profile or namespace to remove (NOT NULL)
1042 * @size: size of the name
1044 * Remove a profile or sub namespace from the current namespace, so that
1045 * they can not be found anymore and mark them as replaced by unconfined
1047 * NOTE: removing confinement does not restore rlimits to preconfinemnet values
1049 * Returns: size of data consume else error code if fails
1051 ssize_t aa_remove_profiles(struct aa_ns *view, struct aa_profile *subj,
1052 char *fqname, size_t size)
1054 struct aa_ns *root = NULL, *ns = NULL;
1055 struct aa_profile *profile = NULL;
1056 const char *name = fqname, *info = NULL;
1057 char *ns_name = NULL;
1061 info = "no profile specified";
1068 if (fqname[0] == ':') {
1069 name = aa_split_fqname(fqname, &ns_name);
1070 /* released below */
1071 ns = aa_find_ns(root, ns_name);
1073 info = "namespace does not exist";
1078 /* released below */
1079 ns = aa_get_ns(root);
1082 /* remove namespace - can only happen if fqname[0] == ':' */
1083 mutex_lock(&ns->parent->lock);
1085 mutex_unlock(&ns->parent->lock);
1087 /* remove profile */
1088 mutex_lock(&ns->lock);
1089 profile = aa_get_profile(__lookup_profile(&ns->base, name));
1092 info = "profile does not exist";
1095 name = profile->base.hname;
1096 __remove_profile(profile);
1097 mutex_unlock(&ns->lock);
1100 /* don't fail removal if audit fails */
1101 (void) audit_policy(subj, OP_PROF_RM, ns_name, name, info,
1104 aa_put_profile(profile);
1108 mutex_unlock(&ns->lock);
1112 (void) audit_policy(subj, OP_PROF_RM, ns_name, name, info,