1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Security plug functions
5 * Copyright (C) 2001 WireX Communications, Inc <chris@wirex.com>
6 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
7 * Copyright (C) 2001 Networks Associates Technology, Inc <ssmalley@nai.com>
8 * Copyright (C) 2016 Mellanox Technologies
11 #define pr_fmt(fmt) "LSM: " fmt
13 #include <linux/bpf.h>
14 #include <linux/capability.h>
15 #include <linux/dcache.h>
16 #include <linux/export.h>
17 #include <linux/init.h>
18 #include <linux/kernel.h>
19 #include <linux/lsm_hooks.h>
20 #include <linux/integrity.h>
21 #include <linux/ima.h>
22 #include <linux/evm.h>
23 #include <linux/fsnotify.h>
24 #include <linux/mman.h>
25 #include <linux/mount.h>
26 #include <linux/personality.h>
27 #include <linux/backing-dev.h>
28 #include <linux/string.h>
29 #include <linux/msg.h>
32 #define MAX_LSM_EVM_XATTR 2
34 /* How many LSMs were built into the kernel? */
35 #define LSM_COUNT (__end_lsm_info - __start_lsm_info)
37 struct security_hook_heads security_hook_heads __lsm_ro_after_init;
38 static BLOCKING_NOTIFIER_HEAD(blocking_lsm_notifier_chain);
40 static struct kmem_cache *lsm_file_cache;
41 static struct kmem_cache *lsm_inode_cache;
44 static struct lsm_blob_sizes blob_sizes __lsm_ro_after_init;
46 /* Boot-time LSM user choice */
47 static __initdata const char *chosen_lsm_order;
48 static __initdata const char *chosen_major_lsm;
50 static __initconst const char * const builtin_lsm_order = CONFIG_LSM;
52 /* Ordered list of LSMs to initialize. */
53 static __initdata struct lsm_info **ordered_lsms;
54 static __initdata struct lsm_info *exclusive;
56 static __initdata bool debug;
57 #define init_debug(...) \
60 pr_info(__VA_ARGS__); \
63 static bool __init is_enabled(struct lsm_info *lsm)
71 /* Mark an LSM's enabled flag. */
72 static int lsm_enabled_true __initdata = 1;
73 static int lsm_enabled_false __initdata = 0;
74 static void __init set_enabled(struct lsm_info *lsm, bool enabled)
77 * When an LSM hasn't configured an enable variable, we can use
78 * a hard-coded location for storing the default enabled state.
82 lsm->enabled = &lsm_enabled_true;
84 lsm->enabled = &lsm_enabled_false;
85 } else if (lsm->enabled == &lsm_enabled_true) {
87 lsm->enabled = &lsm_enabled_false;
88 } else if (lsm->enabled == &lsm_enabled_false) {
90 lsm->enabled = &lsm_enabled_true;
92 *lsm->enabled = enabled;
96 /* Is an LSM already listed in the ordered LSMs list? */
97 static bool __init exists_ordered_lsm(struct lsm_info *lsm)
99 struct lsm_info **check;
101 for (check = ordered_lsms; *check; check++)
108 /* Append an LSM to the list of ordered LSMs to initialize. */
109 static int last_lsm __initdata;
110 static void __init append_ordered_lsm(struct lsm_info *lsm, const char *from)
112 /* Ignore duplicate selections. */
113 if (exists_ordered_lsm(lsm))
116 if (WARN(last_lsm == LSM_COUNT, "%s: out of LSM slots!?\n", from))
119 /* Enable this LSM, if it is not already set. */
121 lsm->enabled = &lsm_enabled_true;
122 ordered_lsms[last_lsm++] = lsm;
124 init_debug("%s ordering: %s (%sabled)\n", from, lsm->name,
125 is_enabled(lsm) ? "en" : "dis");
128 /* Is an LSM allowed to be initialized? */
129 static bool __init lsm_allowed(struct lsm_info *lsm)
131 /* Skip if the LSM is disabled. */
132 if (!is_enabled(lsm))
135 /* Not allowed if another exclusive LSM already initialized. */
136 if ((lsm->flags & LSM_FLAG_EXCLUSIVE) && exclusive) {
137 init_debug("exclusive disabled: %s\n", lsm->name);
144 static void __init lsm_set_blob_size(int *need, int *lbs)
155 static void __init lsm_set_blob_sizes(struct lsm_blob_sizes *needed)
160 lsm_set_blob_size(&needed->lbs_cred, &blob_sizes.lbs_cred);
161 lsm_set_blob_size(&needed->lbs_file, &blob_sizes.lbs_file);
163 * The inode blob gets an rcu_head in addition to
164 * what the modules might need.
166 if (needed->lbs_inode && blob_sizes.lbs_inode == 0)
167 blob_sizes.lbs_inode = sizeof(struct rcu_head);
168 lsm_set_blob_size(&needed->lbs_inode, &blob_sizes.lbs_inode);
169 lsm_set_blob_size(&needed->lbs_ipc, &blob_sizes.lbs_ipc);
170 lsm_set_blob_size(&needed->lbs_msg_msg, &blob_sizes.lbs_msg_msg);
171 lsm_set_blob_size(&needed->lbs_task, &blob_sizes.lbs_task);
174 /* Prepare LSM for initialization. */
175 static void __init prepare_lsm(struct lsm_info *lsm)
177 int enabled = lsm_allowed(lsm);
179 /* Record enablement (to handle any following exclusive LSMs). */
180 set_enabled(lsm, enabled);
182 /* If enabled, do pre-initialization work. */
184 if ((lsm->flags & LSM_FLAG_EXCLUSIVE) && !exclusive) {
186 init_debug("exclusive chosen: %s\n", lsm->name);
189 lsm_set_blob_sizes(lsm->blobs);
193 /* Initialize a given LSM, if it is enabled. */
194 static void __init initialize_lsm(struct lsm_info *lsm)
196 if (is_enabled(lsm)) {
199 init_debug("initializing %s\n", lsm->name);
201 WARN(ret, "%s failed to initialize: %d\n", lsm->name, ret);
205 /* Populate ordered LSMs list from comma-separated LSM name list. */
206 static void __init ordered_lsm_parse(const char *order, const char *origin)
208 struct lsm_info *lsm;
209 char *sep, *name, *next;
211 /* LSM_ORDER_FIRST is always first. */
212 for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) {
213 if (lsm->order == LSM_ORDER_FIRST)
214 append_ordered_lsm(lsm, "first");
217 /* Process "security=", if given. */
218 if (chosen_major_lsm) {
219 struct lsm_info *major;
222 * To match the original "security=" behavior, this
223 * explicitly does NOT fallback to another Legacy Major
224 * if the selected one was separately disabled: disable
225 * all non-matching Legacy Major LSMs.
227 for (major = __start_lsm_info; major < __end_lsm_info;
229 if ((major->flags & LSM_FLAG_LEGACY_MAJOR) &&
230 strcmp(major->name, chosen_major_lsm) != 0) {
231 set_enabled(major, false);
232 init_debug("security=%s disabled: %s\n",
233 chosen_major_lsm, major->name);
238 sep = kstrdup(order, GFP_KERNEL);
240 /* Walk the list, looking for matching LSMs. */
241 while ((name = strsep(&next, ",")) != NULL) {
244 for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) {
245 if (lsm->order == LSM_ORDER_MUTABLE &&
246 strcmp(lsm->name, name) == 0) {
247 append_ordered_lsm(lsm, origin);
253 init_debug("%s ignored: %s\n", origin, name);
256 /* Process "security=", if given. */
257 if (chosen_major_lsm) {
258 for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) {
259 if (exists_ordered_lsm(lsm))
261 if (strcmp(lsm->name, chosen_major_lsm) == 0)
262 append_ordered_lsm(lsm, "security=");
266 /* Disable all LSMs not in the ordered list. */
267 for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) {
268 if (exists_ordered_lsm(lsm))
270 set_enabled(lsm, false);
271 init_debug("%s disabled: %s\n", origin, lsm->name);
277 static void __init lsm_early_cred(struct cred *cred);
278 static void __init lsm_early_task(struct task_struct *task);
280 static void __init ordered_lsm_init(void)
282 struct lsm_info **lsm;
284 ordered_lsms = kcalloc(LSM_COUNT + 1, sizeof(*ordered_lsms),
287 if (chosen_lsm_order) {
288 if (chosen_major_lsm) {
289 pr_info("security= is ignored because it is superseded by lsm=\n");
290 chosen_major_lsm = NULL;
292 ordered_lsm_parse(chosen_lsm_order, "cmdline");
294 ordered_lsm_parse(builtin_lsm_order, "builtin");
296 for (lsm = ordered_lsms; *lsm; lsm++)
299 init_debug("cred blob size = %d\n", blob_sizes.lbs_cred);
300 init_debug("file blob size = %d\n", blob_sizes.lbs_file);
301 init_debug("inode blob size = %d\n", blob_sizes.lbs_inode);
302 init_debug("ipc blob size = %d\n", blob_sizes.lbs_ipc);
303 init_debug("msg_msg blob size = %d\n", blob_sizes.lbs_msg_msg);
304 init_debug("task blob size = %d\n", blob_sizes.lbs_task);
307 * Create any kmem_caches needed for blobs
309 if (blob_sizes.lbs_file)
310 lsm_file_cache = kmem_cache_create("lsm_file_cache",
311 blob_sizes.lbs_file, 0,
313 if (blob_sizes.lbs_inode)
314 lsm_inode_cache = kmem_cache_create("lsm_inode_cache",
315 blob_sizes.lbs_inode, 0,
318 lsm_early_cred((struct cred *) current->cred);
319 lsm_early_task(current);
320 for (lsm = ordered_lsms; *lsm; lsm++)
321 initialize_lsm(*lsm);
327 * security_init - initializes the security framework
329 * This should be called early in the kernel initialization sequence.
331 int __init security_init(void)
334 struct hlist_head *list = (struct hlist_head *) &security_hook_heads;
336 pr_info("Security Framework initializing\n");
338 for (i = 0; i < sizeof(security_hook_heads) / sizeof(struct hlist_head);
340 INIT_HLIST_HEAD(&list[i]);
342 /* Load LSMs in specified order. */
348 /* Save user chosen LSM */
349 static int __init choose_major_lsm(char *str)
351 chosen_major_lsm = str;
354 __setup("security=", choose_major_lsm);
356 /* Explicitly choose LSM initialization order. */
357 static int __init choose_lsm_order(char *str)
359 chosen_lsm_order = str;
362 __setup("lsm=", choose_lsm_order);
364 /* Enable LSM order debugging. */
365 static int __init enable_debug(char *str)
370 __setup("lsm.debug", enable_debug);
372 static bool match_last_lsm(const char *list, const char *lsm)
376 if (WARN_ON(!list || !lsm))
378 last = strrchr(list, ',');
380 /* Pass the comma, strcmp() will check for '\0' */
384 return !strcmp(last, lsm);
387 static int lsm_append(char *new, char **result)
391 if (*result == NULL) {
392 *result = kstrdup(new, GFP_KERNEL);
396 /* Check if it is the last registered name */
397 if (match_last_lsm(*result, new))
399 cp = kasprintf(GFP_KERNEL, "%s,%s", *result, new);
409 * security_add_hooks - Add a modules hooks to the hook lists.
410 * @hooks: the hooks to add
411 * @count: the number of hooks to add
412 * @lsm: the name of the security module
414 * Each LSM has to register its hooks with the infrastructure.
416 void __init security_add_hooks(struct security_hook_list *hooks, int count,
421 for (i = 0; i < count; i++) {
423 hlist_add_tail_rcu(&hooks[i].list, hooks[i].head);
425 if (lsm_append(lsm, &lsm_names) < 0)
426 panic("%s - Cannot get early memory.\n", __func__);
429 int call_blocking_lsm_notifier(enum lsm_event event, void *data)
431 return blocking_notifier_call_chain(&blocking_lsm_notifier_chain,
434 EXPORT_SYMBOL(call_blocking_lsm_notifier);
436 int register_blocking_lsm_notifier(struct notifier_block *nb)
438 return blocking_notifier_chain_register(&blocking_lsm_notifier_chain,
441 EXPORT_SYMBOL(register_blocking_lsm_notifier);
443 int unregister_blocking_lsm_notifier(struct notifier_block *nb)
445 return blocking_notifier_chain_unregister(&blocking_lsm_notifier_chain,
448 EXPORT_SYMBOL(unregister_blocking_lsm_notifier);
451 * lsm_cred_alloc - allocate a composite cred blob
452 * @cred: the cred that needs a blob
453 * @gfp: allocation type
455 * Allocate the cred blob for all the modules
457 * Returns 0, or -ENOMEM if memory can't be allocated.
459 static int lsm_cred_alloc(struct cred *cred, gfp_t gfp)
461 if (blob_sizes.lbs_cred == 0) {
462 cred->security = NULL;
466 cred->security = kzalloc(blob_sizes.lbs_cred, gfp);
467 if (cred->security == NULL)
473 * lsm_early_cred - during initialization allocate a composite cred blob
474 * @cred: the cred that needs a blob
476 * Allocate the cred blob for all the modules
478 static void __init lsm_early_cred(struct cred *cred)
480 int rc = lsm_cred_alloc(cred, GFP_KERNEL);
483 panic("%s: Early cred alloc failed.\n", __func__);
487 * lsm_file_alloc - allocate a composite file blob
488 * @file: the file that needs a blob
490 * Allocate the file blob for all the modules
492 * Returns 0, or -ENOMEM if memory can't be allocated.
494 static int lsm_file_alloc(struct file *file)
496 if (!lsm_file_cache) {
497 file->f_security = NULL;
501 file->f_security = kmem_cache_zalloc(lsm_file_cache, GFP_KERNEL);
502 if (file->f_security == NULL)
508 * lsm_inode_alloc - allocate a composite inode blob
509 * @inode: the inode that needs a blob
511 * Allocate the inode blob for all the modules
513 * Returns 0, or -ENOMEM if memory can't be allocated.
515 int lsm_inode_alloc(struct inode *inode)
517 if (!lsm_inode_cache) {
518 inode->i_security = NULL;
522 inode->i_security = kmem_cache_zalloc(lsm_inode_cache, GFP_NOFS);
523 if (inode->i_security == NULL)
529 * lsm_task_alloc - allocate a composite task blob
530 * @task: the task that needs a blob
532 * Allocate the task blob for all the modules
534 * Returns 0, or -ENOMEM if memory can't be allocated.
536 static int lsm_task_alloc(struct task_struct *task)
538 if (blob_sizes.lbs_task == 0) {
539 task->security = NULL;
543 task->security = kzalloc(blob_sizes.lbs_task, GFP_KERNEL);
544 if (task->security == NULL)
550 * lsm_ipc_alloc - allocate a composite ipc blob
551 * @kip: the ipc that needs a blob
553 * Allocate the ipc blob for all the modules
555 * Returns 0, or -ENOMEM if memory can't be allocated.
557 static int lsm_ipc_alloc(struct kern_ipc_perm *kip)
559 if (blob_sizes.lbs_ipc == 0) {
560 kip->security = NULL;
564 kip->security = kzalloc(blob_sizes.lbs_ipc, GFP_KERNEL);
565 if (kip->security == NULL)
571 * lsm_msg_msg_alloc - allocate a composite msg_msg blob
572 * @mp: the msg_msg that needs a blob
574 * Allocate the ipc blob for all the modules
576 * Returns 0, or -ENOMEM if memory can't be allocated.
578 static int lsm_msg_msg_alloc(struct msg_msg *mp)
580 if (blob_sizes.lbs_msg_msg == 0) {
585 mp->security = kzalloc(blob_sizes.lbs_msg_msg, GFP_KERNEL);
586 if (mp->security == NULL)
592 * lsm_early_task - during initialization allocate a composite task blob
593 * @task: the task that needs a blob
595 * Allocate the task blob for all the modules
597 static void __init lsm_early_task(struct task_struct *task)
599 int rc = lsm_task_alloc(task);
602 panic("%s: Early task alloc failed.\n", __func__);
606 * Hook list operation macros.
609 * This is a hook that does not return a value.
612 * This is a hook that returns a value.
615 #define call_void_hook(FUNC, ...) \
617 struct security_hook_list *P; \
619 hlist_for_each_entry(P, &security_hook_heads.FUNC, list) \
620 P->hook.FUNC(__VA_ARGS__); \
623 #define call_int_hook(FUNC, IRC, ...) ({ \
626 struct security_hook_list *P; \
628 hlist_for_each_entry(P, &security_hook_heads.FUNC, list) { \
629 RC = P->hook.FUNC(__VA_ARGS__); \
637 /* Security operations */
639 int security_binder_set_context_mgr(struct task_struct *mgr)
641 return call_int_hook(binder_set_context_mgr, 0, mgr);
644 int security_binder_transaction(struct task_struct *from,
645 struct task_struct *to)
647 return call_int_hook(binder_transaction, 0, from, to);
650 int security_binder_transfer_binder(struct task_struct *from,
651 struct task_struct *to)
653 return call_int_hook(binder_transfer_binder, 0, from, to);
656 int security_binder_transfer_file(struct task_struct *from,
657 struct task_struct *to, struct file *file)
659 return call_int_hook(binder_transfer_file, 0, from, to, file);
662 int security_ptrace_access_check(struct task_struct *child, unsigned int mode)
664 return call_int_hook(ptrace_access_check, 0, child, mode);
667 int security_ptrace_traceme(struct task_struct *parent)
669 return call_int_hook(ptrace_traceme, 0, parent);
672 int security_capget(struct task_struct *target,
673 kernel_cap_t *effective,
674 kernel_cap_t *inheritable,
675 kernel_cap_t *permitted)
677 return call_int_hook(capget, 0, target,
678 effective, inheritable, permitted);
681 int security_capset(struct cred *new, const struct cred *old,
682 const kernel_cap_t *effective,
683 const kernel_cap_t *inheritable,
684 const kernel_cap_t *permitted)
686 return call_int_hook(capset, 0, new, old,
687 effective, inheritable, permitted);
690 int security_capable(const struct cred *cred,
691 struct user_namespace *ns,
695 return call_int_hook(capable, 0, cred, ns, cap, opts);
698 int security_quotactl(int cmds, int type, int id, struct super_block *sb)
700 return call_int_hook(quotactl, 0, cmds, type, id, sb);
703 int security_quota_on(struct dentry *dentry)
705 return call_int_hook(quota_on, 0, dentry);
708 int security_syslog(int type)
710 return call_int_hook(syslog, 0, type);
713 int security_settime64(const struct timespec64 *ts, const struct timezone *tz)
715 return call_int_hook(settime, 0, ts, tz);
718 int security_vm_enough_memory_mm(struct mm_struct *mm, long pages)
720 struct security_hook_list *hp;
721 int cap_sys_admin = 1;
725 * The module will respond with a positive value if
726 * it thinks the __vm_enough_memory() call should be
727 * made with the cap_sys_admin set. If all of the modules
728 * agree that it should be set it will. If any module
729 * thinks it should not be set it won't.
731 hlist_for_each_entry(hp, &security_hook_heads.vm_enough_memory, list) {
732 rc = hp->hook.vm_enough_memory(mm, pages);
738 return __vm_enough_memory(mm, pages, cap_sys_admin);
741 int security_bprm_set_creds(struct linux_binprm *bprm)
743 return call_int_hook(bprm_set_creds, 0, bprm);
746 int security_bprm_check(struct linux_binprm *bprm)
750 ret = call_int_hook(bprm_check_security, 0, bprm);
753 return ima_bprm_check(bprm);
756 void security_bprm_committing_creds(struct linux_binprm *bprm)
758 call_void_hook(bprm_committing_creds, bprm);
761 void security_bprm_committed_creds(struct linux_binprm *bprm)
763 call_void_hook(bprm_committed_creds, bprm);
766 int security_fs_context_dup(struct fs_context *fc, struct fs_context *src_fc)
768 return call_int_hook(fs_context_dup, 0, fc, src_fc);
771 int security_fs_context_parse_param(struct fs_context *fc, struct fs_parameter *param)
773 return call_int_hook(fs_context_parse_param, -ENOPARAM, fc, param);
776 int security_sb_alloc(struct super_block *sb)
778 return call_int_hook(sb_alloc_security, 0, sb);
781 void security_sb_free(struct super_block *sb)
783 call_void_hook(sb_free_security, sb);
786 void security_free_mnt_opts(void **mnt_opts)
790 call_void_hook(sb_free_mnt_opts, *mnt_opts);
793 EXPORT_SYMBOL(security_free_mnt_opts);
795 int security_sb_eat_lsm_opts(char *options, void **mnt_opts)
797 return call_int_hook(sb_eat_lsm_opts, 0, options, mnt_opts);
799 EXPORT_SYMBOL(security_sb_eat_lsm_opts);
801 int security_sb_remount(struct super_block *sb,
804 return call_int_hook(sb_remount, 0, sb, mnt_opts);
806 EXPORT_SYMBOL(security_sb_remount);
808 int security_sb_kern_mount(struct super_block *sb)
810 return call_int_hook(sb_kern_mount, 0, sb);
813 int security_sb_show_options(struct seq_file *m, struct super_block *sb)
815 return call_int_hook(sb_show_options, 0, m, sb);
818 int security_sb_statfs(struct dentry *dentry)
820 return call_int_hook(sb_statfs, 0, dentry);
823 int security_sb_mount(const char *dev_name, const struct path *path,
824 const char *type, unsigned long flags, void *data)
826 return call_int_hook(sb_mount, 0, dev_name, path, type, flags, data);
829 int security_sb_umount(struct vfsmount *mnt, int flags)
831 return call_int_hook(sb_umount, 0, mnt, flags);
834 int security_sb_pivotroot(const struct path *old_path, const struct path *new_path)
836 return call_int_hook(sb_pivotroot, 0, old_path, new_path);
839 int security_sb_set_mnt_opts(struct super_block *sb,
841 unsigned long kern_flags,
842 unsigned long *set_kern_flags)
844 return call_int_hook(sb_set_mnt_opts,
845 mnt_opts ? -EOPNOTSUPP : 0, sb,
846 mnt_opts, kern_flags, set_kern_flags);
848 EXPORT_SYMBOL(security_sb_set_mnt_opts);
850 int security_sb_clone_mnt_opts(const struct super_block *oldsb,
851 struct super_block *newsb,
852 unsigned long kern_flags,
853 unsigned long *set_kern_flags)
855 return call_int_hook(sb_clone_mnt_opts, 0, oldsb, newsb,
856 kern_flags, set_kern_flags);
858 EXPORT_SYMBOL(security_sb_clone_mnt_opts);
860 int security_add_mnt_opt(const char *option, const char *val, int len,
863 return call_int_hook(sb_add_mnt_opt, -EINVAL,
864 option, val, len, mnt_opts);
866 EXPORT_SYMBOL(security_add_mnt_opt);
868 int security_move_mount(const struct path *from_path, const struct path *to_path)
870 return call_int_hook(move_mount, 0, from_path, to_path);
873 int security_inode_alloc(struct inode *inode)
875 int rc = lsm_inode_alloc(inode);
879 rc = call_int_hook(inode_alloc_security, 0, inode);
881 security_inode_free(inode);
885 static void inode_free_by_rcu(struct rcu_head *head)
888 * The rcu head is at the start of the inode blob
890 kmem_cache_free(lsm_inode_cache, head);
893 void security_inode_free(struct inode *inode)
895 integrity_inode_free(inode);
896 call_void_hook(inode_free_security, inode);
898 * The inode may still be referenced in a path walk and
899 * a call to security_inode_permission() can be made
900 * after inode_free_security() is called. Ideally, the VFS
901 * wouldn't do this, but fixing that is a much harder
902 * job. For now, simply free the i_security via RCU, and
903 * leave the current inode->i_security pointer intact.
904 * The inode will be freed after the RCU grace period too.
906 if (inode->i_security)
907 call_rcu((struct rcu_head *)inode->i_security,
911 int security_dentry_init_security(struct dentry *dentry, int mode,
912 const struct qstr *name, void **ctx,
915 return call_int_hook(dentry_init_security, -EOPNOTSUPP, dentry, mode,
918 EXPORT_SYMBOL(security_dentry_init_security);
920 int security_dentry_create_files_as(struct dentry *dentry, int mode,
922 const struct cred *old, struct cred *new)
924 return call_int_hook(dentry_create_files_as, 0, dentry, mode,
927 EXPORT_SYMBOL(security_dentry_create_files_as);
929 int security_inode_init_security(struct inode *inode, struct inode *dir,
930 const struct qstr *qstr,
931 const initxattrs initxattrs, void *fs_data)
933 struct xattr new_xattrs[MAX_LSM_EVM_XATTR + 1];
934 struct xattr *lsm_xattr, *evm_xattr, *xattr;
937 if (unlikely(IS_PRIVATE(inode)))
941 return call_int_hook(inode_init_security, -EOPNOTSUPP, inode,
942 dir, qstr, NULL, NULL, NULL);
943 memset(new_xattrs, 0, sizeof(new_xattrs));
944 lsm_xattr = new_xattrs;
945 ret = call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir, qstr,
948 &lsm_xattr->value_len);
952 evm_xattr = lsm_xattr + 1;
953 ret = evm_inode_init_security(inode, lsm_xattr, evm_xattr);
956 ret = initxattrs(inode, new_xattrs, fs_data);
958 for (xattr = new_xattrs; xattr->value != NULL; xattr++)
960 return (ret == -EOPNOTSUPP) ? 0 : ret;
962 EXPORT_SYMBOL(security_inode_init_security);
964 int security_old_inode_init_security(struct inode *inode, struct inode *dir,
965 const struct qstr *qstr, const char **name,
966 void **value, size_t *len)
968 if (unlikely(IS_PRIVATE(inode)))
970 return call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir,
971 qstr, name, value, len);
973 EXPORT_SYMBOL(security_old_inode_init_security);
975 #ifdef CONFIG_SECURITY_PATH
976 int security_path_mknod(const struct path *dir, struct dentry *dentry, umode_t mode,
979 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
981 return call_int_hook(path_mknod, 0, dir, dentry, mode, dev);
983 EXPORT_SYMBOL(security_path_mknod);
985 int security_path_mkdir(const struct path *dir, struct dentry *dentry, umode_t mode)
987 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
989 return call_int_hook(path_mkdir, 0, dir, dentry, mode);
991 EXPORT_SYMBOL(security_path_mkdir);
993 int security_path_rmdir(const struct path *dir, struct dentry *dentry)
995 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
997 return call_int_hook(path_rmdir, 0, dir, dentry);
1000 int security_path_unlink(const struct path *dir, struct dentry *dentry)
1002 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
1004 return call_int_hook(path_unlink, 0, dir, dentry);
1006 EXPORT_SYMBOL(security_path_unlink);
1008 int security_path_symlink(const struct path *dir, struct dentry *dentry,
1009 const char *old_name)
1011 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
1013 return call_int_hook(path_symlink, 0, dir, dentry, old_name);
1016 int security_path_link(struct dentry *old_dentry, const struct path *new_dir,
1017 struct dentry *new_dentry)
1019 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry))))
1021 return call_int_hook(path_link, 0, old_dentry, new_dir, new_dentry);
1024 int security_path_rename(const struct path *old_dir, struct dentry *old_dentry,
1025 const struct path *new_dir, struct dentry *new_dentry,
1028 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) ||
1029 (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry)))))
1032 if (flags & RENAME_EXCHANGE) {
1033 int err = call_int_hook(path_rename, 0, new_dir, new_dentry,
1034 old_dir, old_dentry);
1039 return call_int_hook(path_rename, 0, old_dir, old_dentry, new_dir,
1042 EXPORT_SYMBOL(security_path_rename);
1044 int security_path_truncate(const struct path *path)
1046 if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
1048 return call_int_hook(path_truncate, 0, path);
1051 int security_path_chmod(const struct path *path, umode_t mode)
1053 if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
1055 return call_int_hook(path_chmod, 0, path, mode);
1058 int security_path_chown(const struct path *path, kuid_t uid, kgid_t gid)
1060 if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
1062 return call_int_hook(path_chown, 0, path, uid, gid);
1065 int security_path_chroot(const struct path *path)
1067 return call_int_hook(path_chroot, 0, path);
1071 int security_inode_create(struct inode *dir, struct dentry *dentry, umode_t mode)
1073 if (unlikely(IS_PRIVATE(dir)))
1075 return call_int_hook(inode_create, 0, dir, dentry, mode);
1077 EXPORT_SYMBOL_GPL(security_inode_create);
1079 int security_inode_link(struct dentry *old_dentry, struct inode *dir,
1080 struct dentry *new_dentry)
1082 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry))))
1084 return call_int_hook(inode_link, 0, old_dentry, dir, new_dentry);
1087 int security_inode_unlink(struct inode *dir, struct dentry *dentry)
1089 if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1091 return call_int_hook(inode_unlink, 0, dir, dentry);
1094 int security_inode_symlink(struct inode *dir, struct dentry *dentry,
1095 const char *old_name)
1097 if (unlikely(IS_PRIVATE(dir)))
1099 return call_int_hook(inode_symlink, 0, dir, dentry, old_name);
1102 int security_inode_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
1104 if (unlikely(IS_PRIVATE(dir)))
1106 return call_int_hook(inode_mkdir, 0, dir, dentry, mode);
1108 EXPORT_SYMBOL_GPL(security_inode_mkdir);
1110 int security_inode_rmdir(struct inode *dir, struct dentry *dentry)
1112 if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1114 return call_int_hook(inode_rmdir, 0, dir, dentry);
1117 int security_inode_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t dev)
1119 if (unlikely(IS_PRIVATE(dir)))
1121 return call_int_hook(inode_mknod, 0, dir, dentry, mode, dev);
1124 int security_inode_rename(struct inode *old_dir, struct dentry *old_dentry,
1125 struct inode *new_dir, struct dentry *new_dentry,
1128 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) ||
1129 (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry)))))
1132 if (flags & RENAME_EXCHANGE) {
1133 int err = call_int_hook(inode_rename, 0, new_dir, new_dentry,
1134 old_dir, old_dentry);
1139 return call_int_hook(inode_rename, 0, old_dir, old_dentry,
1140 new_dir, new_dentry);
1143 int security_inode_readlink(struct dentry *dentry)
1145 if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1147 return call_int_hook(inode_readlink, 0, dentry);
1150 int security_inode_follow_link(struct dentry *dentry, struct inode *inode,
1153 if (unlikely(IS_PRIVATE(inode)))
1155 return call_int_hook(inode_follow_link, 0, dentry, inode, rcu);
1158 int security_inode_permission(struct inode *inode, int mask)
1160 if (unlikely(IS_PRIVATE(inode)))
1162 return call_int_hook(inode_permission, 0, inode, mask);
1165 int security_inode_setattr(struct dentry *dentry, struct iattr *attr)
1169 if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1171 ret = call_int_hook(inode_setattr, 0, dentry, attr);
1174 return evm_inode_setattr(dentry, attr);
1176 EXPORT_SYMBOL_GPL(security_inode_setattr);
1178 int security_inode_getattr(const struct path *path)
1180 if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
1182 return call_int_hook(inode_getattr, 0, path);
1185 int security_inode_setxattr(struct dentry *dentry, const char *name,
1186 const void *value, size_t size, int flags)
1190 if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1193 * SELinux and Smack integrate the cap call,
1194 * so assume that all LSMs supplying this call do so.
1196 ret = call_int_hook(inode_setxattr, 1, dentry, name, value, size,
1200 ret = cap_inode_setxattr(dentry, name, value, size, flags);
1203 ret = ima_inode_setxattr(dentry, name, value, size);
1206 return evm_inode_setxattr(dentry, name, value, size);
1209 void security_inode_post_setxattr(struct dentry *dentry, const char *name,
1210 const void *value, size_t size, int flags)
1212 if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1214 call_void_hook(inode_post_setxattr, dentry, name, value, size, flags);
1215 evm_inode_post_setxattr(dentry, name, value, size);
1218 int security_inode_getxattr(struct dentry *dentry, const char *name)
1220 if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1222 return call_int_hook(inode_getxattr, 0, dentry, name);
1225 int security_inode_listxattr(struct dentry *dentry)
1227 if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1229 return call_int_hook(inode_listxattr, 0, dentry);
1232 int security_inode_removexattr(struct dentry *dentry, const char *name)
1236 if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1239 * SELinux and Smack integrate the cap call,
1240 * so assume that all LSMs supplying this call do so.
1242 ret = call_int_hook(inode_removexattr, 1, dentry, name);
1244 ret = cap_inode_removexattr(dentry, name);
1247 ret = ima_inode_removexattr(dentry, name);
1250 return evm_inode_removexattr(dentry, name);
1253 int security_inode_need_killpriv(struct dentry *dentry)
1255 return call_int_hook(inode_need_killpriv, 0, dentry);
1258 int security_inode_killpriv(struct dentry *dentry)
1260 return call_int_hook(inode_killpriv, 0, dentry);
1263 int security_inode_getsecurity(struct inode *inode, const char *name, void **buffer, bool alloc)
1265 struct security_hook_list *hp;
1268 if (unlikely(IS_PRIVATE(inode)))
1271 * Only one module will provide an attribute with a given name.
1273 hlist_for_each_entry(hp, &security_hook_heads.inode_getsecurity, list) {
1274 rc = hp->hook.inode_getsecurity(inode, name, buffer, alloc);
1275 if (rc != -EOPNOTSUPP)
1281 int security_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags)
1283 struct security_hook_list *hp;
1286 if (unlikely(IS_PRIVATE(inode)))
1289 * Only one module will provide an attribute with a given name.
1291 hlist_for_each_entry(hp, &security_hook_heads.inode_setsecurity, list) {
1292 rc = hp->hook.inode_setsecurity(inode, name, value, size,
1294 if (rc != -EOPNOTSUPP)
1300 int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size)
1302 if (unlikely(IS_PRIVATE(inode)))
1304 return call_int_hook(inode_listsecurity, 0, inode, buffer, buffer_size);
1306 EXPORT_SYMBOL(security_inode_listsecurity);
1308 void security_inode_getsecid(struct inode *inode, u32 *secid)
1310 call_void_hook(inode_getsecid, inode, secid);
1313 int security_inode_copy_up(struct dentry *src, struct cred **new)
1315 return call_int_hook(inode_copy_up, 0, src, new);
1317 EXPORT_SYMBOL(security_inode_copy_up);
1319 int security_inode_copy_up_xattr(const char *name)
1321 return call_int_hook(inode_copy_up_xattr, -EOPNOTSUPP, name);
1323 EXPORT_SYMBOL(security_inode_copy_up_xattr);
1325 int security_kernfs_init_security(struct kernfs_node *kn_dir,
1326 struct kernfs_node *kn)
1328 return call_int_hook(kernfs_init_security, 0, kn_dir, kn);
1331 int security_file_permission(struct file *file, int mask)
1335 ret = call_int_hook(file_permission, 0, file, mask);
1339 return fsnotify_perm(file, mask);
1342 int security_file_alloc(struct file *file)
1344 int rc = lsm_file_alloc(file);
1348 rc = call_int_hook(file_alloc_security, 0, file);
1350 security_file_free(file);
1354 void security_file_free(struct file *file)
1358 call_void_hook(file_free_security, file);
1360 blob = file->f_security;
1362 file->f_security = NULL;
1363 kmem_cache_free(lsm_file_cache, blob);
1367 int security_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1369 return call_int_hook(file_ioctl, 0, file, cmd, arg);
1372 static inline unsigned long mmap_prot(struct file *file, unsigned long prot)
1375 * Does we have PROT_READ and does the application expect
1376 * it to imply PROT_EXEC? If not, nothing to talk about...
1378 if ((prot & (PROT_READ | PROT_EXEC)) != PROT_READ)
1380 if (!(current->personality & READ_IMPLIES_EXEC))
1383 * if that's an anonymous mapping, let it.
1386 return prot | PROT_EXEC;
1388 * ditto if it's not on noexec mount, except that on !MMU we need
1389 * NOMMU_MAP_EXEC (== VM_MAYEXEC) in this case
1391 if (!path_noexec(&file->f_path)) {
1393 if (file->f_op->mmap_capabilities) {
1394 unsigned caps = file->f_op->mmap_capabilities(file);
1395 if (!(caps & NOMMU_MAP_EXEC))
1399 return prot | PROT_EXEC;
1401 /* anything on noexec mount won't get PROT_EXEC */
1405 int security_mmap_file(struct file *file, unsigned long prot,
1406 unsigned long flags)
1409 ret = call_int_hook(mmap_file, 0, file, prot,
1410 mmap_prot(file, prot), flags);
1413 return ima_file_mmap(file, prot);
1416 int security_mmap_addr(unsigned long addr)
1418 return call_int_hook(mmap_addr, 0, addr);
1421 int security_file_mprotect(struct vm_area_struct *vma, unsigned long reqprot,
1424 return call_int_hook(file_mprotect, 0, vma, reqprot, prot);
1427 int security_file_lock(struct file *file, unsigned int cmd)
1429 return call_int_hook(file_lock, 0, file, cmd);
1432 int security_file_fcntl(struct file *file, unsigned int cmd, unsigned long arg)
1434 return call_int_hook(file_fcntl, 0, file, cmd, arg);
1437 void security_file_set_fowner(struct file *file)
1439 call_void_hook(file_set_fowner, file);
1442 int security_file_send_sigiotask(struct task_struct *tsk,
1443 struct fown_struct *fown, int sig)
1445 return call_int_hook(file_send_sigiotask, 0, tsk, fown, sig);
1448 int security_file_receive(struct file *file)
1450 return call_int_hook(file_receive, 0, file);
1453 int security_file_open(struct file *file)
1457 ret = call_int_hook(file_open, 0, file);
1461 return fsnotify_perm(file, MAY_OPEN);
1464 int security_task_alloc(struct task_struct *task, unsigned long clone_flags)
1466 int rc = lsm_task_alloc(task);
1470 rc = call_int_hook(task_alloc, 0, task, clone_flags);
1472 security_task_free(task);
1476 void security_task_free(struct task_struct *task)
1478 call_void_hook(task_free, task);
1480 kfree(task->security);
1481 task->security = NULL;
1484 int security_cred_alloc_blank(struct cred *cred, gfp_t gfp)
1486 int rc = lsm_cred_alloc(cred, gfp);
1491 rc = call_int_hook(cred_alloc_blank, 0, cred, gfp);
1493 security_cred_free(cred);
1497 void security_cred_free(struct cred *cred)
1500 * There is a failure case in prepare_creds() that
1501 * may result in a call here with ->security being NULL.
1503 if (unlikely(cred->security == NULL))
1506 call_void_hook(cred_free, cred);
1508 kfree(cred->security);
1509 cred->security = NULL;
1512 int security_prepare_creds(struct cred *new, const struct cred *old, gfp_t gfp)
1514 int rc = lsm_cred_alloc(new, gfp);
1519 rc = call_int_hook(cred_prepare, 0, new, old, gfp);
1521 security_cred_free(new);
1525 void security_transfer_creds(struct cred *new, const struct cred *old)
1527 call_void_hook(cred_transfer, new, old);
1530 void security_cred_getsecid(const struct cred *c, u32 *secid)
1533 call_void_hook(cred_getsecid, c, secid);
1535 EXPORT_SYMBOL(security_cred_getsecid);
1537 int security_kernel_act_as(struct cred *new, u32 secid)
1539 return call_int_hook(kernel_act_as, 0, new, secid);
1542 int security_kernel_create_files_as(struct cred *new, struct inode *inode)
1544 return call_int_hook(kernel_create_files_as, 0, new, inode);
1547 int security_kernel_module_request(char *kmod_name)
1551 ret = call_int_hook(kernel_module_request, 0, kmod_name);
1554 return integrity_kernel_module_request(kmod_name);
1557 int security_kernel_read_file(struct file *file, enum kernel_read_file_id id)
1561 ret = call_int_hook(kernel_read_file, 0, file, id);
1564 return ima_read_file(file, id);
1566 EXPORT_SYMBOL_GPL(security_kernel_read_file);
1568 int security_kernel_post_read_file(struct file *file, char *buf, loff_t size,
1569 enum kernel_read_file_id id)
1573 ret = call_int_hook(kernel_post_read_file, 0, file, buf, size, id);
1576 return ima_post_read_file(file, buf, size, id);
1578 EXPORT_SYMBOL_GPL(security_kernel_post_read_file);
1580 int security_kernel_load_data(enum kernel_load_data_id id)
1584 ret = call_int_hook(kernel_load_data, 0, id);
1587 return ima_load_data(id);
1589 EXPORT_SYMBOL_GPL(security_kernel_load_data);
1591 int security_task_fix_setuid(struct cred *new, const struct cred *old,
1594 return call_int_hook(task_fix_setuid, 0, new, old, flags);
1597 int security_task_setpgid(struct task_struct *p, pid_t pgid)
1599 return call_int_hook(task_setpgid, 0, p, pgid);
1602 int security_task_getpgid(struct task_struct *p)
1604 return call_int_hook(task_getpgid, 0, p);
1607 int security_task_getsid(struct task_struct *p)
1609 return call_int_hook(task_getsid, 0, p);
1612 void security_task_getsecid(struct task_struct *p, u32 *secid)
1615 call_void_hook(task_getsecid, p, secid);
1617 EXPORT_SYMBOL(security_task_getsecid);
1619 int security_task_setnice(struct task_struct *p, int nice)
1621 return call_int_hook(task_setnice, 0, p, nice);
1624 int security_task_setioprio(struct task_struct *p, int ioprio)
1626 return call_int_hook(task_setioprio, 0, p, ioprio);
1629 int security_task_getioprio(struct task_struct *p)
1631 return call_int_hook(task_getioprio, 0, p);
1634 int security_task_prlimit(const struct cred *cred, const struct cred *tcred,
1637 return call_int_hook(task_prlimit, 0, cred, tcred, flags);
1640 int security_task_setrlimit(struct task_struct *p, unsigned int resource,
1641 struct rlimit *new_rlim)
1643 return call_int_hook(task_setrlimit, 0, p, resource, new_rlim);
1646 int security_task_setscheduler(struct task_struct *p)
1648 return call_int_hook(task_setscheduler, 0, p);
1651 int security_task_getscheduler(struct task_struct *p)
1653 return call_int_hook(task_getscheduler, 0, p);
1656 int security_task_movememory(struct task_struct *p)
1658 return call_int_hook(task_movememory, 0, p);
1661 int security_task_kill(struct task_struct *p, struct kernel_siginfo *info,
1662 int sig, const struct cred *cred)
1664 return call_int_hook(task_kill, 0, p, info, sig, cred);
1667 int security_task_prctl(int option, unsigned long arg2, unsigned long arg3,
1668 unsigned long arg4, unsigned long arg5)
1672 struct security_hook_list *hp;
1674 hlist_for_each_entry(hp, &security_hook_heads.task_prctl, list) {
1675 thisrc = hp->hook.task_prctl(option, arg2, arg3, arg4, arg5);
1676 if (thisrc != -ENOSYS) {
1685 void security_task_to_inode(struct task_struct *p, struct inode *inode)
1687 call_void_hook(task_to_inode, p, inode);
1690 int security_ipc_permission(struct kern_ipc_perm *ipcp, short flag)
1692 return call_int_hook(ipc_permission, 0, ipcp, flag);
1695 void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid)
1698 call_void_hook(ipc_getsecid, ipcp, secid);
1701 int security_msg_msg_alloc(struct msg_msg *msg)
1703 int rc = lsm_msg_msg_alloc(msg);
1707 rc = call_int_hook(msg_msg_alloc_security, 0, msg);
1709 security_msg_msg_free(msg);
1713 void security_msg_msg_free(struct msg_msg *msg)
1715 call_void_hook(msg_msg_free_security, msg);
1716 kfree(msg->security);
1717 msg->security = NULL;
1720 int security_msg_queue_alloc(struct kern_ipc_perm *msq)
1722 int rc = lsm_ipc_alloc(msq);
1726 rc = call_int_hook(msg_queue_alloc_security, 0, msq);
1728 security_msg_queue_free(msq);
1732 void security_msg_queue_free(struct kern_ipc_perm *msq)
1734 call_void_hook(msg_queue_free_security, msq);
1735 kfree(msq->security);
1736 msq->security = NULL;
1739 int security_msg_queue_associate(struct kern_ipc_perm *msq, int msqflg)
1741 return call_int_hook(msg_queue_associate, 0, msq, msqflg);
1744 int security_msg_queue_msgctl(struct kern_ipc_perm *msq, int cmd)
1746 return call_int_hook(msg_queue_msgctl, 0, msq, cmd);
1749 int security_msg_queue_msgsnd(struct kern_ipc_perm *msq,
1750 struct msg_msg *msg, int msqflg)
1752 return call_int_hook(msg_queue_msgsnd, 0, msq, msg, msqflg);
1755 int security_msg_queue_msgrcv(struct kern_ipc_perm *msq, struct msg_msg *msg,
1756 struct task_struct *target, long type, int mode)
1758 return call_int_hook(msg_queue_msgrcv, 0, msq, msg, target, type, mode);
1761 int security_shm_alloc(struct kern_ipc_perm *shp)
1763 int rc = lsm_ipc_alloc(shp);
1767 rc = call_int_hook(shm_alloc_security, 0, shp);
1769 security_shm_free(shp);
1773 void security_shm_free(struct kern_ipc_perm *shp)
1775 call_void_hook(shm_free_security, shp);
1776 kfree(shp->security);
1777 shp->security = NULL;
1780 int security_shm_associate(struct kern_ipc_perm *shp, int shmflg)
1782 return call_int_hook(shm_associate, 0, shp, shmflg);
1785 int security_shm_shmctl(struct kern_ipc_perm *shp, int cmd)
1787 return call_int_hook(shm_shmctl, 0, shp, cmd);
1790 int security_shm_shmat(struct kern_ipc_perm *shp, char __user *shmaddr, int shmflg)
1792 return call_int_hook(shm_shmat, 0, shp, shmaddr, shmflg);
1795 int security_sem_alloc(struct kern_ipc_perm *sma)
1797 int rc = lsm_ipc_alloc(sma);
1801 rc = call_int_hook(sem_alloc_security, 0, sma);
1803 security_sem_free(sma);
1807 void security_sem_free(struct kern_ipc_perm *sma)
1809 call_void_hook(sem_free_security, sma);
1810 kfree(sma->security);
1811 sma->security = NULL;
1814 int security_sem_associate(struct kern_ipc_perm *sma, int semflg)
1816 return call_int_hook(sem_associate, 0, sma, semflg);
1819 int security_sem_semctl(struct kern_ipc_perm *sma, int cmd)
1821 return call_int_hook(sem_semctl, 0, sma, cmd);
1824 int security_sem_semop(struct kern_ipc_perm *sma, struct sembuf *sops,
1825 unsigned nsops, int alter)
1827 return call_int_hook(sem_semop, 0, sma, sops, nsops, alter);
1830 void security_d_instantiate(struct dentry *dentry, struct inode *inode)
1832 if (unlikely(inode && IS_PRIVATE(inode)))
1834 call_void_hook(d_instantiate, dentry, inode);
1836 EXPORT_SYMBOL(security_d_instantiate);
1838 int security_getprocattr(struct task_struct *p, const char *lsm, char *name,
1841 struct security_hook_list *hp;
1843 hlist_for_each_entry(hp, &security_hook_heads.getprocattr, list) {
1844 if (lsm != NULL && strcmp(lsm, hp->lsm))
1846 return hp->hook.getprocattr(p, name, value);
1851 int security_setprocattr(const char *lsm, const char *name, void *value,
1854 struct security_hook_list *hp;
1856 hlist_for_each_entry(hp, &security_hook_heads.setprocattr, list) {
1857 if (lsm != NULL && strcmp(lsm, hp->lsm))
1859 return hp->hook.setprocattr(name, value, size);
1864 int security_netlink_send(struct sock *sk, struct sk_buff *skb)
1866 return call_int_hook(netlink_send, 0, sk, skb);
1869 int security_ismaclabel(const char *name)
1871 return call_int_hook(ismaclabel, 0, name);
1873 EXPORT_SYMBOL(security_ismaclabel);
1875 int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
1877 return call_int_hook(secid_to_secctx, -EOPNOTSUPP, secid, secdata,
1880 EXPORT_SYMBOL(security_secid_to_secctx);
1882 int security_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid)
1885 return call_int_hook(secctx_to_secid, 0, secdata, seclen, secid);
1887 EXPORT_SYMBOL(security_secctx_to_secid);
1889 void security_release_secctx(char *secdata, u32 seclen)
1891 call_void_hook(release_secctx, secdata, seclen);
1893 EXPORT_SYMBOL(security_release_secctx);
1895 void security_inode_invalidate_secctx(struct inode *inode)
1897 call_void_hook(inode_invalidate_secctx, inode);
1899 EXPORT_SYMBOL(security_inode_invalidate_secctx);
1901 int security_inode_notifysecctx(struct inode *inode, void *ctx, u32 ctxlen)
1903 return call_int_hook(inode_notifysecctx, 0, inode, ctx, ctxlen);
1905 EXPORT_SYMBOL(security_inode_notifysecctx);
1907 int security_inode_setsecctx(struct dentry *dentry, void *ctx, u32 ctxlen)
1909 return call_int_hook(inode_setsecctx, 0, dentry, ctx, ctxlen);
1911 EXPORT_SYMBOL(security_inode_setsecctx);
1913 int security_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen)
1915 return call_int_hook(inode_getsecctx, -EOPNOTSUPP, inode, ctx, ctxlen);
1917 EXPORT_SYMBOL(security_inode_getsecctx);
1919 #ifdef CONFIG_SECURITY_NETWORK
1921 int security_unix_stream_connect(struct sock *sock, struct sock *other, struct sock *newsk)
1923 return call_int_hook(unix_stream_connect, 0, sock, other, newsk);
1925 EXPORT_SYMBOL(security_unix_stream_connect);
1927 int security_unix_may_send(struct socket *sock, struct socket *other)
1929 return call_int_hook(unix_may_send, 0, sock, other);
1931 EXPORT_SYMBOL(security_unix_may_send);
1933 int security_socket_create(int family, int type, int protocol, int kern)
1935 return call_int_hook(socket_create, 0, family, type, protocol, kern);
1938 int security_socket_post_create(struct socket *sock, int family,
1939 int type, int protocol, int kern)
1941 return call_int_hook(socket_post_create, 0, sock, family, type,
1945 int security_socket_socketpair(struct socket *socka, struct socket *sockb)
1947 return call_int_hook(socket_socketpair, 0, socka, sockb);
1949 EXPORT_SYMBOL(security_socket_socketpair);
1951 int security_socket_bind(struct socket *sock, struct sockaddr *address, int addrlen)
1953 return call_int_hook(socket_bind, 0, sock, address, addrlen);
1956 int security_socket_connect(struct socket *sock, struct sockaddr *address, int addrlen)
1958 return call_int_hook(socket_connect, 0, sock, address, addrlen);
1961 int security_socket_listen(struct socket *sock, int backlog)
1963 return call_int_hook(socket_listen, 0, sock, backlog);
1966 int security_socket_accept(struct socket *sock, struct socket *newsock)
1968 return call_int_hook(socket_accept, 0, sock, newsock);
1971 int security_socket_sendmsg(struct socket *sock, struct msghdr *msg, int size)
1973 return call_int_hook(socket_sendmsg, 0, sock, msg, size);
1976 int security_socket_recvmsg(struct socket *sock, struct msghdr *msg,
1977 int size, int flags)
1979 return call_int_hook(socket_recvmsg, 0, sock, msg, size, flags);
1982 int security_socket_getsockname(struct socket *sock)
1984 return call_int_hook(socket_getsockname, 0, sock);
1987 int security_socket_getpeername(struct socket *sock)
1989 return call_int_hook(socket_getpeername, 0, sock);
1992 int security_socket_getsockopt(struct socket *sock, int level, int optname)
1994 return call_int_hook(socket_getsockopt, 0, sock, level, optname);
1997 int security_socket_setsockopt(struct socket *sock, int level, int optname)
1999 return call_int_hook(socket_setsockopt, 0, sock, level, optname);
2002 int security_socket_shutdown(struct socket *sock, int how)
2004 return call_int_hook(socket_shutdown, 0, sock, how);
2007 int security_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
2009 return call_int_hook(socket_sock_rcv_skb, 0, sk, skb);
2011 EXPORT_SYMBOL(security_sock_rcv_skb);
2013 int security_socket_getpeersec_stream(struct socket *sock, char __user *optval,
2014 int __user *optlen, unsigned len)
2016 return call_int_hook(socket_getpeersec_stream, -ENOPROTOOPT, sock,
2017 optval, optlen, len);
2020 int security_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb, u32 *secid)
2022 return call_int_hook(socket_getpeersec_dgram, -ENOPROTOOPT, sock,
2025 EXPORT_SYMBOL(security_socket_getpeersec_dgram);
2027 int security_sk_alloc(struct sock *sk, int family, gfp_t priority)
2029 return call_int_hook(sk_alloc_security, 0, sk, family, priority);
2032 void security_sk_free(struct sock *sk)
2034 call_void_hook(sk_free_security, sk);
2037 void security_sk_clone(const struct sock *sk, struct sock *newsk)
2039 call_void_hook(sk_clone_security, sk, newsk);
2041 EXPORT_SYMBOL(security_sk_clone);
2043 void security_sk_classify_flow(struct sock *sk, struct flowi *fl)
2045 call_void_hook(sk_getsecid, sk, &fl->flowi_secid);
2047 EXPORT_SYMBOL(security_sk_classify_flow);
2049 void security_req_classify_flow(const struct request_sock *req, struct flowi *fl)
2051 call_void_hook(req_classify_flow, req, fl);
2053 EXPORT_SYMBOL(security_req_classify_flow);
2055 void security_sock_graft(struct sock *sk, struct socket *parent)
2057 call_void_hook(sock_graft, sk, parent);
2059 EXPORT_SYMBOL(security_sock_graft);
2061 int security_inet_conn_request(struct sock *sk,
2062 struct sk_buff *skb, struct request_sock *req)
2064 return call_int_hook(inet_conn_request, 0, sk, skb, req);
2066 EXPORT_SYMBOL(security_inet_conn_request);
2068 void security_inet_csk_clone(struct sock *newsk,
2069 const struct request_sock *req)
2071 call_void_hook(inet_csk_clone, newsk, req);
2074 void security_inet_conn_established(struct sock *sk,
2075 struct sk_buff *skb)
2077 call_void_hook(inet_conn_established, sk, skb);
2079 EXPORT_SYMBOL(security_inet_conn_established);
2081 int security_secmark_relabel_packet(u32 secid)
2083 return call_int_hook(secmark_relabel_packet, 0, secid);
2085 EXPORT_SYMBOL(security_secmark_relabel_packet);
2087 void security_secmark_refcount_inc(void)
2089 call_void_hook(secmark_refcount_inc);
2091 EXPORT_SYMBOL(security_secmark_refcount_inc);
2093 void security_secmark_refcount_dec(void)
2095 call_void_hook(secmark_refcount_dec);
2097 EXPORT_SYMBOL(security_secmark_refcount_dec);
2099 int security_tun_dev_alloc_security(void **security)
2101 return call_int_hook(tun_dev_alloc_security, 0, security);
2103 EXPORT_SYMBOL(security_tun_dev_alloc_security);
2105 void security_tun_dev_free_security(void *security)
2107 call_void_hook(tun_dev_free_security, security);
2109 EXPORT_SYMBOL(security_tun_dev_free_security);
2111 int security_tun_dev_create(void)
2113 return call_int_hook(tun_dev_create, 0);
2115 EXPORT_SYMBOL(security_tun_dev_create);
2117 int security_tun_dev_attach_queue(void *security)
2119 return call_int_hook(tun_dev_attach_queue, 0, security);
2121 EXPORT_SYMBOL(security_tun_dev_attach_queue);
2123 int security_tun_dev_attach(struct sock *sk, void *security)
2125 return call_int_hook(tun_dev_attach, 0, sk, security);
2127 EXPORT_SYMBOL(security_tun_dev_attach);
2129 int security_tun_dev_open(void *security)
2131 return call_int_hook(tun_dev_open, 0, security);
2133 EXPORT_SYMBOL(security_tun_dev_open);
2135 int security_sctp_assoc_request(struct sctp_endpoint *ep, struct sk_buff *skb)
2137 return call_int_hook(sctp_assoc_request, 0, ep, skb);
2139 EXPORT_SYMBOL(security_sctp_assoc_request);
2141 int security_sctp_bind_connect(struct sock *sk, int optname,
2142 struct sockaddr *address, int addrlen)
2144 return call_int_hook(sctp_bind_connect, 0, sk, optname,
2147 EXPORT_SYMBOL(security_sctp_bind_connect);
2149 void security_sctp_sk_clone(struct sctp_endpoint *ep, struct sock *sk,
2152 call_void_hook(sctp_sk_clone, ep, sk, newsk);
2154 EXPORT_SYMBOL(security_sctp_sk_clone);
2156 #endif /* CONFIG_SECURITY_NETWORK */
2158 #ifdef CONFIG_SECURITY_INFINIBAND
2160 int security_ib_pkey_access(void *sec, u64 subnet_prefix, u16 pkey)
2162 return call_int_hook(ib_pkey_access, 0, sec, subnet_prefix, pkey);
2164 EXPORT_SYMBOL(security_ib_pkey_access);
2166 int security_ib_endport_manage_subnet(void *sec, const char *dev_name, u8 port_num)
2168 return call_int_hook(ib_endport_manage_subnet, 0, sec, dev_name, port_num);
2170 EXPORT_SYMBOL(security_ib_endport_manage_subnet);
2172 int security_ib_alloc_security(void **sec)
2174 return call_int_hook(ib_alloc_security, 0, sec);
2176 EXPORT_SYMBOL(security_ib_alloc_security);
2178 void security_ib_free_security(void *sec)
2180 call_void_hook(ib_free_security, sec);
2182 EXPORT_SYMBOL(security_ib_free_security);
2183 #endif /* CONFIG_SECURITY_INFINIBAND */
2185 #ifdef CONFIG_SECURITY_NETWORK_XFRM
2187 int security_xfrm_policy_alloc(struct xfrm_sec_ctx **ctxp,
2188 struct xfrm_user_sec_ctx *sec_ctx,
2191 return call_int_hook(xfrm_policy_alloc_security, 0, ctxp, sec_ctx, gfp);
2193 EXPORT_SYMBOL(security_xfrm_policy_alloc);
2195 int security_xfrm_policy_clone(struct xfrm_sec_ctx *old_ctx,
2196 struct xfrm_sec_ctx **new_ctxp)
2198 return call_int_hook(xfrm_policy_clone_security, 0, old_ctx, new_ctxp);
2201 void security_xfrm_policy_free(struct xfrm_sec_ctx *ctx)
2203 call_void_hook(xfrm_policy_free_security, ctx);
2205 EXPORT_SYMBOL(security_xfrm_policy_free);
2207 int security_xfrm_policy_delete(struct xfrm_sec_ctx *ctx)
2209 return call_int_hook(xfrm_policy_delete_security, 0, ctx);
2212 int security_xfrm_state_alloc(struct xfrm_state *x,
2213 struct xfrm_user_sec_ctx *sec_ctx)
2215 return call_int_hook(xfrm_state_alloc, 0, x, sec_ctx);
2217 EXPORT_SYMBOL(security_xfrm_state_alloc);
2219 int security_xfrm_state_alloc_acquire(struct xfrm_state *x,
2220 struct xfrm_sec_ctx *polsec, u32 secid)
2222 return call_int_hook(xfrm_state_alloc_acquire, 0, x, polsec, secid);
2225 int security_xfrm_state_delete(struct xfrm_state *x)
2227 return call_int_hook(xfrm_state_delete_security, 0, x);
2229 EXPORT_SYMBOL(security_xfrm_state_delete);
2231 void security_xfrm_state_free(struct xfrm_state *x)
2233 call_void_hook(xfrm_state_free_security, x);
2236 int security_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir)
2238 return call_int_hook(xfrm_policy_lookup, 0, ctx, fl_secid, dir);
2241 int security_xfrm_state_pol_flow_match(struct xfrm_state *x,
2242 struct xfrm_policy *xp,
2243 const struct flowi *fl)
2245 struct security_hook_list *hp;
2249 * Since this function is expected to return 0 or 1, the judgment
2250 * becomes difficult if multiple LSMs supply this call. Fortunately,
2251 * we can use the first LSM's judgment because currently only SELinux
2252 * supplies this call.
2254 * For speed optimization, we explicitly break the loop rather than
2257 hlist_for_each_entry(hp, &security_hook_heads.xfrm_state_pol_flow_match,
2259 rc = hp->hook.xfrm_state_pol_flow_match(x, xp, fl);
2265 int security_xfrm_decode_session(struct sk_buff *skb, u32 *secid)
2267 return call_int_hook(xfrm_decode_session, 0, skb, secid, 1);
2270 void security_skb_classify_flow(struct sk_buff *skb, struct flowi *fl)
2272 int rc = call_int_hook(xfrm_decode_session, 0, skb, &fl->flowi_secid,
2277 EXPORT_SYMBOL(security_skb_classify_flow);
2279 #endif /* CONFIG_SECURITY_NETWORK_XFRM */
2283 int security_key_alloc(struct key *key, const struct cred *cred,
2284 unsigned long flags)
2286 return call_int_hook(key_alloc, 0, key, cred, flags);
2289 void security_key_free(struct key *key)
2291 call_void_hook(key_free, key);
2294 int security_key_permission(key_ref_t key_ref,
2295 const struct cred *cred, unsigned perm)
2297 return call_int_hook(key_permission, 0, key_ref, cred, perm);
2300 int security_key_getsecurity(struct key *key, char **_buffer)
2303 return call_int_hook(key_getsecurity, 0, key, _buffer);
2306 #endif /* CONFIG_KEYS */
2310 int security_audit_rule_init(u32 field, u32 op, char *rulestr, void **lsmrule)
2312 return call_int_hook(audit_rule_init, 0, field, op, rulestr, lsmrule);
2315 int security_audit_rule_known(struct audit_krule *krule)
2317 return call_int_hook(audit_rule_known, 0, krule);
2320 void security_audit_rule_free(void *lsmrule)
2322 call_void_hook(audit_rule_free, lsmrule);
2325 int security_audit_rule_match(u32 secid, u32 field, u32 op, void *lsmrule)
2327 return call_int_hook(audit_rule_match, 0, secid, field, op, lsmrule);
2329 #endif /* CONFIG_AUDIT */
2331 #ifdef CONFIG_BPF_SYSCALL
2332 int security_bpf(int cmd, union bpf_attr *attr, unsigned int size)
2334 return call_int_hook(bpf, 0, cmd, attr, size);
2336 int security_bpf_map(struct bpf_map *map, fmode_t fmode)
2338 return call_int_hook(bpf_map, 0, map, fmode);
2340 int security_bpf_prog(struct bpf_prog *prog)
2342 return call_int_hook(bpf_prog, 0, prog);
2344 int security_bpf_map_alloc(struct bpf_map *map)
2346 return call_int_hook(bpf_map_alloc_security, 0, map);
2348 int security_bpf_prog_alloc(struct bpf_prog_aux *aux)
2350 return call_int_hook(bpf_prog_alloc_security, 0, aux);
2352 void security_bpf_map_free(struct bpf_map *map)
2354 call_void_hook(bpf_map_free_security, map);
2356 void security_bpf_prog_free(struct bpf_prog_aux *aux)
2358 call_void_hook(bpf_prog_free_security, aux);
2360 #endif /* CONFIG_BPF_SYSCALL */