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)
36 #define EARLY_LSM_COUNT (__end_early_lsm_info - __start_early_lsm_info)
39 * These are descriptions of the reasons that can be passed to the
40 * security_locked_down() LSM hook. Placing this array here allows
41 * all security modules to use the same descriptions for auditing
44 const char *const lockdown_reasons[LOCKDOWN_CONFIDENTIALITY_MAX+1] = {
45 [LOCKDOWN_NONE] = "none",
46 [LOCKDOWN_MODULE_SIGNATURE] = "unsigned module loading",
47 [LOCKDOWN_DEV_MEM] = "/dev/mem,kmem,port",
48 [LOCKDOWN_EFI_TEST] = "/dev/efi_test access",
49 [LOCKDOWN_KEXEC] = "kexec of unsigned images",
50 [LOCKDOWN_HIBERNATION] = "hibernation",
51 [LOCKDOWN_PCI_ACCESS] = "direct PCI access",
52 [LOCKDOWN_IOPORT] = "raw io port access",
53 [LOCKDOWN_MSR] = "raw MSR access",
54 [LOCKDOWN_ACPI_TABLES] = "modifying ACPI tables",
55 [LOCKDOWN_PCMCIA_CIS] = "direct PCMCIA CIS storage",
56 [LOCKDOWN_TIOCSSERIAL] = "reconfiguration of serial port IO",
57 [LOCKDOWN_MODULE_PARAMETERS] = "unsafe module parameters",
58 [LOCKDOWN_MMIOTRACE] = "unsafe mmio",
59 [LOCKDOWN_DEBUGFS] = "debugfs access",
60 [LOCKDOWN_XMON_WR] = "xmon write access",
61 [LOCKDOWN_INTEGRITY_MAX] = "integrity",
62 [LOCKDOWN_KCORE] = "/proc/kcore access",
63 [LOCKDOWN_KPROBES] = "use of kprobes",
64 [LOCKDOWN_BPF_READ] = "use of bpf to read kernel RAM",
65 [LOCKDOWN_PERF] = "unsafe use of perf",
66 [LOCKDOWN_TRACEFS] = "use of tracefs",
67 [LOCKDOWN_XMON_RW] = "xmon read and write access",
68 [LOCKDOWN_CONFIDENTIALITY_MAX] = "confidentiality",
71 struct security_hook_heads security_hook_heads __lsm_ro_after_init;
72 static BLOCKING_NOTIFIER_HEAD(blocking_lsm_notifier_chain);
74 static struct kmem_cache *lsm_file_cache;
75 static struct kmem_cache *lsm_inode_cache;
78 static struct lsm_blob_sizes blob_sizes __lsm_ro_after_init;
80 /* Boot-time LSM user choice */
81 static __initdata const char *chosen_lsm_order;
82 static __initdata const char *chosen_major_lsm;
84 static __initconst const char * const builtin_lsm_order = CONFIG_LSM;
86 /* Ordered list of LSMs to initialize. */
87 static __initdata struct lsm_info **ordered_lsms;
88 static __initdata struct lsm_info *exclusive;
90 static __initdata bool debug;
91 #define init_debug(...) \
94 pr_info(__VA_ARGS__); \
97 static bool __init is_enabled(struct lsm_info *lsm)
102 return *lsm->enabled;
105 /* Mark an LSM's enabled flag. */
106 static int lsm_enabled_true __initdata = 1;
107 static int lsm_enabled_false __initdata = 0;
108 static void __init set_enabled(struct lsm_info *lsm, bool enabled)
111 * When an LSM hasn't configured an enable variable, we can use
112 * a hard-coded location for storing the default enabled state.
116 lsm->enabled = &lsm_enabled_true;
118 lsm->enabled = &lsm_enabled_false;
119 } else if (lsm->enabled == &lsm_enabled_true) {
121 lsm->enabled = &lsm_enabled_false;
122 } else if (lsm->enabled == &lsm_enabled_false) {
124 lsm->enabled = &lsm_enabled_true;
126 *lsm->enabled = enabled;
130 /* Is an LSM already listed in the ordered LSMs list? */
131 static bool __init exists_ordered_lsm(struct lsm_info *lsm)
133 struct lsm_info **check;
135 for (check = ordered_lsms; *check; check++)
142 /* Append an LSM to the list of ordered LSMs to initialize. */
143 static int last_lsm __initdata;
144 static void __init append_ordered_lsm(struct lsm_info *lsm, const char *from)
146 /* Ignore duplicate selections. */
147 if (exists_ordered_lsm(lsm))
150 if (WARN(last_lsm == LSM_COUNT, "%s: out of LSM slots!?\n", from))
153 /* Enable this LSM, if it is not already set. */
155 lsm->enabled = &lsm_enabled_true;
156 ordered_lsms[last_lsm++] = lsm;
158 init_debug("%s ordering: %s (%sabled)\n", from, lsm->name,
159 is_enabled(lsm) ? "en" : "dis");
162 /* Is an LSM allowed to be initialized? */
163 static bool __init lsm_allowed(struct lsm_info *lsm)
165 /* Skip if the LSM is disabled. */
166 if (!is_enabled(lsm))
169 /* Not allowed if another exclusive LSM already initialized. */
170 if ((lsm->flags & LSM_FLAG_EXCLUSIVE) && exclusive) {
171 init_debug("exclusive disabled: %s\n", lsm->name);
178 static void __init lsm_set_blob_size(int *need, int *lbs)
189 static void __init lsm_set_blob_sizes(struct lsm_blob_sizes *needed)
194 lsm_set_blob_size(&needed->lbs_cred, &blob_sizes.lbs_cred);
195 lsm_set_blob_size(&needed->lbs_file, &blob_sizes.lbs_file);
197 * The inode blob gets an rcu_head in addition to
198 * what the modules might need.
200 if (needed->lbs_inode && blob_sizes.lbs_inode == 0)
201 blob_sizes.lbs_inode = sizeof(struct rcu_head);
202 lsm_set_blob_size(&needed->lbs_inode, &blob_sizes.lbs_inode);
203 lsm_set_blob_size(&needed->lbs_ipc, &blob_sizes.lbs_ipc);
204 lsm_set_blob_size(&needed->lbs_msg_msg, &blob_sizes.lbs_msg_msg);
205 lsm_set_blob_size(&needed->lbs_task, &blob_sizes.lbs_task);
208 /* Prepare LSM for initialization. */
209 static void __init prepare_lsm(struct lsm_info *lsm)
211 int enabled = lsm_allowed(lsm);
213 /* Record enablement (to handle any following exclusive LSMs). */
214 set_enabled(lsm, enabled);
216 /* If enabled, do pre-initialization work. */
218 if ((lsm->flags & LSM_FLAG_EXCLUSIVE) && !exclusive) {
220 init_debug("exclusive chosen: %s\n", lsm->name);
223 lsm_set_blob_sizes(lsm->blobs);
227 /* Initialize a given LSM, if it is enabled. */
228 static void __init initialize_lsm(struct lsm_info *lsm)
230 if (is_enabled(lsm)) {
233 init_debug("initializing %s\n", lsm->name);
235 WARN(ret, "%s failed to initialize: %d\n", lsm->name, ret);
239 /* Populate ordered LSMs list from comma-separated LSM name list. */
240 static void __init ordered_lsm_parse(const char *order, const char *origin)
242 struct lsm_info *lsm;
243 char *sep, *name, *next;
245 /* LSM_ORDER_FIRST is always first. */
246 for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) {
247 if (lsm->order == LSM_ORDER_FIRST)
248 append_ordered_lsm(lsm, "first");
251 /* Process "security=", if given. */
252 if (chosen_major_lsm) {
253 struct lsm_info *major;
256 * To match the original "security=" behavior, this
257 * explicitly does NOT fallback to another Legacy Major
258 * if the selected one was separately disabled: disable
259 * all non-matching Legacy Major LSMs.
261 for (major = __start_lsm_info; major < __end_lsm_info;
263 if ((major->flags & LSM_FLAG_LEGACY_MAJOR) &&
264 strcmp(major->name, chosen_major_lsm) != 0) {
265 set_enabled(major, false);
266 init_debug("security=%s disabled: %s\n",
267 chosen_major_lsm, major->name);
272 sep = kstrdup(order, GFP_KERNEL);
274 /* Walk the list, looking for matching LSMs. */
275 while ((name = strsep(&next, ",")) != NULL) {
278 for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) {
279 if (lsm->order == LSM_ORDER_MUTABLE &&
280 strcmp(lsm->name, name) == 0) {
281 append_ordered_lsm(lsm, origin);
287 init_debug("%s ignored: %s\n", origin, name);
290 /* Process "security=", if given. */
291 if (chosen_major_lsm) {
292 for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) {
293 if (exists_ordered_lsm(lsm))
295 if (strcmp(lsm->name, chosen_major_lsm) == 0)
296 append_ordered_lsm(lsm, "security=");
300 /* Disable all LSMs not in the ordered list. */
301 for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) {
302 if (exists_ordered_lsm(lsm))
304 set_enabled(lsm, false);
305 init_debug("%s disabled: %s\n", origin, lsm->name);
311 static void __init lsm_early_cred(struct cred *cred);
312 static void __init lsm_early_task(struct task_struct *task);
314 static int lsm_append(const char *new, char **result);
316 static void __init ordered_lsm_init(void)
318 struct lsm_info **lsm;
320 ordered_lsms = kcalloc(LSM_COUNT + 1, sizeof(*ordered_lsms),
323 if (chosen_lsm_order) {
324 if (chosen_major_lsm) {
325 pr_info("security= is ignored because it is superseded by lsm=\n");
326 chosen_major_lsm = NULL;
328 ordered_lsm_parse(chosen_lsm_order, "cmdline");
330 ordered_lsm_parse(builtin_lsm_order, "builtin");
332 for (lsm = ordered_lsms; *lsm; lsm++)
335 init_debug("cred blob size = %d\n", blob_sizes.lbs_cred);
336 init_debug("file blob size = %d\n", blob_sizes.lbs_file);
337 init_debug("inode blob size = %d\n", blob_sizes.lbs_inode);
338 init_debug("ipc blob size = %d\n", blob_sizes.lbs_ipc);
339 init_debug("msg_msg blob size = %d\n", blob_sizes.lbs_msg_msg);
340 init_debug("task blob size = %d\n", blob_sizes.lbs_task);
343 * Create any kmem_caches needed for blobs
345 if (blob_sizes.lbs_file)
346 lsm_file_cache = kmem_cache_create("lsm_file_cache",
347 blob_sizes.lbs_file, 0,
349 if (blob_sizes.lbs_inode)
350 lsm_inode_cache = kmem_cache_create("lsm_inode_cache",
351 blob_sizes.lbs_inode, 0,
354 lsm_early_cred((struct cred *) current->cred);
355 lsm_early_task(current);
356 for (lsm = ordered_lsms; *lsm; lsm++)
357 initialize_lsm(*lsm);
362 int __init early_security_init(void)
365 struct hlist_head *list = (struct hlist_head *) &security_hook_heads;
366 struct lsm_info *lsm;
368 for (i = 0; i < sizeof(security_hook_heads) / sizeof(struct hlist_head);
370 INIT_HLIST_HEAD(&list[i]);
372 for (lsm = __start_early_lsm_info; lsm < __end_early_lsm_info; lsm++) {
374 lsm->enabled = &lsm_enabled_true;
383 * security_init - initializes the security framework
385 * This should be called early in the kernel initialization sequence.
387 int __init security_init(void)
389 struct lsm_info *lsm;
391 pr_info("Security Framework initializing\n");
394 * Append the names of the early LSM modules now that kmalloc() is
397 for (lsm = __start_early_lsm_info; lsm < __end_early_lsm_info; lsm++) {
399 lsm_append(lsm->name, &lsm_names);
402 /* Load LSMs in specified order. */
408 /* Save user chosen LSM */
409 static int __init choose_major_lsm(char *str)
411 chosen_major_lsm = str;
414 __setup("security=", choose_major_lsm);
416 /* Explicitly choose LSM initialization order. */
417 static int __init choose_lsm_order(char *str)
419 chosen_lsm_order = str;
422 __setup("lsm=", choose_lsm_order);
424 /* Enable LSM order debugging. */
425 static int __init enable_debug(char *str)
430 __setup("lsm.debug", enable_debug);
432 static bool match_last_lsm(const char *list, const char *lsm)
436 if (WARN_ON(!list || !lsm))
438 last = strrchr(list, ',');
440 /* Pass the comma, strcmp() will check for '\0' */
444 return !strcmp(last, lsm);
447 static int lsm_append(const char *new, char **result)
451 if (*result == NULL) {
452 *result = kstrdup(new, GFP_KERNEL);
456 /* Check if it is the last registered name */
457 if (match_last_lsm(*result, new))
459 cp = kasprintf(GFP_KERNEL, "%s,%s", *result, new);
469 * security_add_hooks - Add a modules hooks to the hook lists.
470 * @hooks: the hooks to add
471 * @count: the number of hooks to add
472 * @lsm: the name of the security module
474 * Each LSM has to register its hooks with the infrastructure.
476 void __init security_add_hooks(struct security_hook_list *hooks, int count,
481 for (i = 0; i < count; i++) {
483 hlist_add_tail_rcu(&hooks[i].list, hooks[i].head);
487 * Don't try to append during early_security_init(), we'll come back
488 * and fix this up afterwards.
490 if (slab_is_available()) {
491 if (lsm_append(lsm, &lsm_names) < 0)
492 panic("%s - Cannot get early memory.\n", __func__);
496 int call_blocking_lsm_notifier(enum lsm_event event, void *data)
498 return blocking_notifier_call_chain(&blocking_lsm_notifier_chain,
501 EXPORT_SYMBOL(call_blocking_lsm_notifier);
503 int register_blocking_lsm_notifier(struct notifier_block *nb)
505 return blocking_notifier_chain_register(&blocking_lsm_notifier_chain,
508 EXPORT_SYMBOL(register_blocking_lsm_notifier);
510 int unregister_blocking_lsm_notifier(struct notifier_block *nb)
512 return blocking_notifier_chain_unregister(&blocking_lsm_notifier_chain,
515 EXPORT_SYMBOL(unregister_blocking_lsm_notifier);
518 * lsm_cred_alloc - allocate a composite cred blob
519 * @cred: the cred that needs a blob
520 * @gfp: allocation type
522 * Allocate the cred blob for all the modules
524 * Returns 0, or -ENOMEM if memory can't be allocated.
526 static int lsm_cred_alloc(struct cred *cred, gfp_t gfp)
528 if (blob_sizes.lbs_cred == 0) {
529 cred->security = NULL;
533 cred->security = kzalloc(blob_sizes.lbs_cred, gfp);
534 if (cred->security == NULL)
540 * lsm_early_cred - during initialization allocate a composite cred blob
541 * @cred: the cred that needs a blob
543 * Allocate the cred blob for all the modules
545 static void __init lsm_early_cred(struct cred *cred)
547 int rc = lsm_cred_alloc(cred, GFP_KERNEL);
550 panic("%s: Early cred alloc failed.\n", __func__);
554 * lsm_file_alloc - allocate a composite file blob
555 * @file: the file that needs a blob
557 * Allocate the file blob for all the modules
559 * Returns 0, or -ENOMEM if memory can't be allocated.
561 static int lsm_file_alloc(struct file *file)
563 if (!lsm_file_cache) {
564 file->f_security = NULL;
568 file->f_security = kmem_cache_zalloc(lsm_file_cache, GFP_KERNEL);
569 if (file->f_security == NULL)
575 * lsm_inode_alloc - allocate a composite inode blob
576 * @inode: the inode that needs a blob
578 * Allocate the inode blob for all the modules
580 * Returns 0, or -ENOMEM if memory can't be allocated.
582 int lsm_inode_alloc(struct inode *inode)
584 if (!lsm_inode_cache) {
585 inode->i_security = NULL;
589 inode->i_security = kmem_cache_zalloc(lsm_inode_cache, GFP_NOFS);
590 if (inode->i_security == NULL)
596 * lsm_task_alloc - allocate a composite task blob
597 * @task: the task that needs a blob
599 * Allocate the task blob for all the modules
601 * Returns 0, or -ENOMEM if memory can't be allocated.
603 static int lsm_task_alloc(struct task_struct *task)
605 if (blob_sizes.lbs_task == 0) {
606 task->security = NULL;
610 task->security = kzalloc(blob_sizes.lbs_task, GFP_KERNEL);
611 if (task->security == NULL)
617 * lsm_ipc_alloc - allocate a composite ipc blob
618 * @kip: the ipc that needs a blob
620 * Allocate the ipc blob for all the modules
622 * Returns 0, or -ENOMEM if memory can't be allocated.
624 static int lsm_ipc_alloc(struct kern_ipc_perm *kip)
626 if (blob_sizes.lbs_ipc == 0) {
627 kip->security = NULL;
631 kip->security = kzalloc(blob_sizes.lbs_ipc, GFP_KERNEL);
632 if (kip->security == NULL)
638 * lsm_msg_msg_alloc - allocate a composite msg_msg blob
639 * @mp: the msg_msg that needs a blob
641 * Allocate the ipc blob for all the modules
643 * Returns 0, or -ENOMEM if memory can't be allocated.
645 static int lsm_msg_msg_alloc(struct msg_msg *mp)
647 if (blob_sizes.lbs_msg_msg == 0) {
652 mp->security = kzalloc(blob_sizes.lbs_msg_msg, GFP_KERNEL);
653 if (mp->security == NULL)
659 * lsm_early_task - during initialization allocate a composite task blob
660 * @task: the task that needs a blob
662 * Allocate the task blob for all the modules
664 static void __init lsm_early_task(struct task_struct *task)
666 int rc = lsm_task_alloc(task);
669 panic("%s: Early task alloc failed.\n", __func__);
673 * Hook list operation macros.
676 * This is a hook that does not return a value.
679 * This is a hook that returns a value.
682 #define call_void_hook(FUNC, ...) \
684 struct security_hook_list *P; \
686 hlist_for_each_entry(P, &security_hook_heads.FUNC, list) \
687 P->hook.FUNC(__VA_ARGS__); \
690 #define call_int_hook(FUNC, IRC, ...) ({ \
693 struct security_hook_list *P; \
695 hlist_for_each_entry(P, &security_hook_heads.FUNC, list) { \
696 RC = P->hook.FUNC(__VA_ARGS__); \
704 /* Security operations */
706 int security_binder_set_context_mgr(struct task_struct *mgr)
708 return call_int_hook(binder_set_context_mgr, 0, mgr);
711 int security_binder_transaction(struct task_struct *from,
712 struct task_struct *to)
714 return call_int_hook(binder_transaction, 0, from, to);
717 int security_binder_transfer_binder(struct task_struct *from,
718 struct task_struct *to)
720 return call_int_hook(binder_transfer_binder, 0, from, to);
723 int security_binder_transfer_file(struct task_struct *from,
724 struct task_struct *to, struct file *file)
726 return call_int_hook(binder_transfer_file, 0, from, to, file);
729 int security_ptrace_access_check(struct task_struct *child, unsigned int mode)
731 return call_int_hook(ptrace_access_check, 0, child, mode);
734 int security_ptrace_traceme(struct task_struct *parent)
736 return call_int_hook(ptrace_traceme, 0, parent);
739 int security_capget(struct task_struct *target,
740 kernel_cap_t *effective,
741 kernel_cap_t *inheritable,
742 kernel_cap_t *permitted)
744 return call_int_hook(capget, 0, target,
745 effective, inheritable, permitted);
748 int security_capset(struct cred *new, const struct cred *old,
749 const kernel_cap_t *effective,
750 const kernel_cap_t *inheritable,
751 const kernel_cap_t *permitted)
753 return call_int_hook(capset, 0, new, old,
754 effective, inheritable, permitted);
757 int security_capable(const struct cred *cred,
758 struct user_namespace *ns,
762 return call_int_hook(capable, 0, cred, ns, cap, opts);
765 int security_quotactl(int cmds, int type, int id, struct super_block *sb)
767 return call_int_hook(quotactl, 0, cmds, type, id, sb);
770 int security_quota_on(struct dentry *dentry)
772 return call_int_hook(quota_on, 0, dentry);
775 int security_syslog(int type)
777 return call_int_hook(syslog, 0, type);
780 int security_settime64(const struct timespec64 *ts, const struct timezone *tz)
782 return call_int_hook(settime, 0, ts, tz);
785 int security_vm_enough_memory_mm(struct mm_struct *mm, long pages)
787 struct security_hook_list *hp;
788 int cap_sys_admin = 1;
792 * The module will respond with a positive value if
793 * it thinks the __vm_enough_memory() call should be
794 * made with the cap_sys_admin set. If all of the modules
795 * agree that it should be set it will. If any module
796 * thinks it should not be set it won't.
798 hlist_for_each_entry(hp, &security_hook_heads.vm_enough_memory, list) {
799 rc = hp->hook.vm_enough_memory(mm, pages);
805 return __vm_enough_memory(mm, pages, cap_sys_admin);
808 int security_bprm_set_creds(struct linux_binprm *bprm)
810 return call_int_hook(bprm_set_creds, 0, bprm);
813 int security_bprm_check(struct linux_binprm *bprm)
817 ret = call_int_hook(bprm_check_security, 0, bprm);
820 return ima_bprm_check(bprm);
823 void security_bprm_committing_creds(struct linux_binprm *bprm)
825 call_void_hook(bprm_committing_creds, bprm);
828 void security_bprm_committed_creds(struct linux_binprm *bprm)
830 call_void_hook(bprm_committed_creds, bprm);
833 int security_fs_context_dup(struct fs_context *fc, struct fs_context *src_fc)
835 return call_int_hook(fs_context_dup, 0, fc, src_fc);
838 int security_fs_context_parse_param(struct fs_context *fc, struct fs_parameter *param)
840 return call_int_hook(fs_context_parse_param, -ENOPARAM, fc, param);
843 int security_sb_alloc(struct super_block *sb)
845 return call_int_hook(sb_alloc_security, 0, sb);
848 void security_sb_free(struct super_block *sb)
850 call_void_hook(sb_free_security, sb);
853 void security_free_mnt_opts(void **mnt_opts)
857 call_void_hook(sb_free_mnt_opts, *mnt_opts);
860 EXPORT_SYMBOL(security_free_mnt_opts);
862 int security_sb_eat_lsm_opts(char *options, void **mnt_opts)
864 return call_int_hook(sb_eat_lsm_opts, 0, options, mnt_opts);
866 EXPORT_SYMBOL(security_sb_eat_lsm_opts);
868 int security_sb_remount(struct super_block *sb,
871 return call_int_hook(sb_remount, 0, sb, mnt_opts);
873 EXPORT_SYMBOL(security_sb_remount);
875 int security_sb_kern_mount(struct super_block *sb)
877 return call_int_hook(sb_kern_mount, 0, sb);
880 int security_sb_show_options(struct seq_file *m, struct super_block *sb)
882 return call_int_hook(sb_show_options, 0, m, sb);
885 int security_sb_statfs(struct dentry *dentry)
887 return call_int_hook(sb_statfs, 0, dentry);
890 int security_sb_mount(const char *dev_name, const struct path *path,
891 const char *type, unsigned long flags, void *data)
893 return call_int_hook(sb_mount, 0, dev_name, path, type, flags, data);
896 int security_sb_umount(struct vfsmount *mnt, int flags)
898 return call_int_hook(sb_umount, 0, mnt, flags);
901 int security_sb_pivotroot(const struct path *old_path, const struct path *new_path)
903 return call_int_hook(sb_pivotroot, 0, old_path, new_path);
906 int security_sb_set_mnt_opts(struct super_block *sb,
908 unsigned long kern_flags,
909 unsigned long *set_kern_flags)
911 return call_int_hook(sb_set_mnt_opts,
912 mnt_opts ? -EOPNOTSUPP : 0, sb,
913 mnt_opts, kern_flags, set_kern_flags);
915 EXPORT_SYMBOL(security_sb_set_mnt_opts);
917 int security_sb_clone_mnt_opts(const struct super_block *oldsb,
918 struct super_block *newsb,
919 unsigned long kern_flags,
920 unsigned long *set_kern_flags)
922 return call_int_hook(sb_clone_mnt_opts, 0, oldsb, newsb,
923 kern_flags, set_kern_flags);
925 EXPORT_SYMBOL(security_sb_clone_mnt_opts);
927 int security_add_mnt_opt(const char *option, const char *val, int len,
930 return call_int_hook(sb_add_mnt_opt, -EINVAL,
931 option, val, len, mnt_opts);
933 EXPORT_SYMBOL(security_add_mnt_opt);
935 int security_move_mount(const struct path *from_path, const struct path *to_path)
937 return call_int_hook(move_mount, 0, from_path, to_path);
940 int security_path_notify(const struct path *path, u64 mask,
941 unsigned int obj_type)
943 return call_int_hook(path_notify, 0, path, mask, obj_type);
946 int security_inode_alloc(struct inode *inode)
948 int rc = lsm_inode_alloc(inode);
952 rc = call_int_hook(inode_alloc_security, 0, inode);
954 security_inode_free(inode);
958 static void inode_free_by_rcu(struct rcu_head *head)
961 * The rcu head is at the start of the inode blob
963 kmem_cache_free(lsm_inode_cache, head);
966 void security_inode_free(struct inode *inode)
968 integrity_inode_free(inode);
969 call_void_hook(inode_free_security, inode);
971 * The inode may still be referenced in a path walk and
972 * a call to security_inode_permission() can be made
973 * after inode_free_security() is called. Ideally, the VFS
974 * wouldn't do this, but fixing that is a much harder
975 * job. For now, simply free the i_security via RCU, and
976 * leave the current inode->i_security pointer intact.
977 * The inode will be freed after the RCU grace period too.
979 if (inode->i_security)
980 call_rcu((struct rcu_head *)inode->i_security,
984 int security_dentry_init_security(struct dentry *dentry, int mode,
985 const struct qstr *name, void **ctx,
988 return call_int_hook(dentry_init_security, -EOPNOTSUPP, dentry, mode,
991 EXPORT_SYMBOL(security_dentry_init_security);
993 int security_dentry_create_files_as(struct dentry *dentry, int mode,
995 const struct cred *old, struct cred *new)
997 return call_int_hook(dentry_create_files_as, 0, dentry, mode,
1000 EXPORT_SYMBOL(security_dentry_create_files_as);
1002 int security_inode_init_security(struct inode *inode, struct inode *dir,
1003 const struct qstr *qstr,
1004 const initxattrs initxattrs, void *fs_data)
1006 struct xattr new_xattrs[MAX_LSM_EVM_XATTR + 1];
1007 struct xattr *lsm_xattr, *evm_xattr, *xattr;
1010 if (unlikely(IS_PRIVATE(inode)))
1014 return call_int_hook(inode_init_security, -EOPNOTSUPP, inode,
1015 dir, qstr, NULL, NULL, NULL);
1016 memset(new_xattrs, 0, sizeof(new_xattrs));
1017 lsm_xattr = new_xattrs;
1018 ret = call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir, qstr,
1021 &lsm_xattr->value_len);
1025 evm_xattr = lsm_xattr + 1;
1026 ret = evm_inode_init_security(inode, lsm_xattr, evm_xattr);
1029 ret = initxattrs(inode, new_xattrs, fs_data);
1031 for (xattr = new_xattrs; xattr->value != NULL; xattr++)
1032 kfree(xattr->value);
1033 return (ret == -EOPNOTSUPP) ? 0 : ret;
1035 EXPORT_SYMBOL(security_inode_init_security);
1037 int security_old_inode_init_security(struct inode *inode, struct inode *dir,
1038 const struct qstr *qstr, const char **name,
1039 void **value, size_t *len)
1041 if (unlikely(IS_PRIVATE(inode)))
1043 return call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir,
1044 qstr, name, value, len);
1046 EXPORT_SYMBOL(security_old_inode_init_security);
1048 #ifdef CONFIG_SECURITY_PATH
1049 int security_path_mknod(const struct path *dir, struct dentry *dentry, umode_t mode,
1052 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
1054 return call_int_hook(path_mknod, 0, dir, dentry, mode, dev);
1056 EXPORT_SYMBOL(security_path_mknod);
1058 int security_path_mkdir(const struct path *dir, struct dentry *dentry, umode_t mode)
1060 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
1062 return call_int_hook(path_mkdir, 0, dir, dentry, mode);
1064 EXPORT_SYMBOL(security_path_mkdir);
1066 int security_path_rmdir(const struct path *dir, struct dentry *dentry)
1068 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
1070 return call_int_hook(path_rmdir, 0, dir, dentry);
1073 int security_path_unlink(const struct path *dir, struct dentry *dentry)
1075 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
1077 return call_int_hook(path_unlink, 0, dir, dentry);
1079 EXPORT_SYMBOL(security_path_unlink);
1081 int security_path_symlink(const struct path *dir, struct dentry *dentry,
1082 const char *old_name)
1084 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
1086 return call_int_hook(path_symlink, 0, dir, dentry, old_name);
1089 int security_path_link(struct dentry *old_dentry, const struct path *new_dir,
1090 struct dentry *new_dentry)
1092 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry))))
1094 return call_int_hook(path_link, 0, old_dentry, new_dir, new_dentry);
1097 int security_path_rename(const struct path *old_dir, struct dentry *old_dentry,
1098 const struct path *new_dir, struct dentry *new_dentry,
1101 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) ||
1102 (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry)))))
1105 if (flags & RENAME_EXCHANGE) {
1106 int err = call_int_hook(path_rename, 0, new_dir, new_dentry,
1107 old_dir, old_dentry);
1112 return call_int_hook(path_rename, 0, old_dir, old_dentry, new_dir,
1115 EXPORT_SYMBOL(security_path_rename);
1117 int security_path_truncate(const struct path *path)
1119 if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
1121 return call_int_hook(path_truncate, 0, path);
1124 int security_path_chmod(const struct path *path, umode_t mode)
1126 if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
1128 return call_int_hook(path_chmod, 0, path, mode);
1131 int security_path_chown(const struct path *path, kuid_t uid, kgid_t gid)
1133 if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
1135 return call_int_hook(path_chown, 0, path, uid, gid);
1138 int security_path_chroot(const struct path *path)
1140 return call_int_hook(path_chroot, 0, path);
1144 int security_inode_create(struct inode *dir, struct dentry *dentry, umode_t mode)
1146 if (unlikely(IS_PRIVATE(dir)))
1148 return call_int_hook(inode_create, 0, dir, dentry, mode);
1150 EXPORT_SYMBOL_GPL(security_inode_create);
1152 int security_inode_link(struct dentry *old_dentry, struct inode *dir,
1153 struct dentry *new_dentry)
1155 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry))))
1157 return call_int_hook(inode_link, 0, old_dentry, dir, new_dentry);
1160 int security_inode_unlink(struct inode *dir, struct dentry *dentry)
1162 if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1164 return call_int_hook(inode_unlink, 0, dir, dentry);
1167 int security_inode_symlink(struct inode *dir, struct dentry *dentry,
1168 const char *old_name)
1170 if (unlikely(IS_PRIVATE(dir)))
1172 return call_int_hook(inode_symlink, 0, dir, dentry, old_name);
1175 int security_inode_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
1177 if (unlikely(IS_PRIVATE(dir)))
1179 return call_int_hook(inode_mkdir, 0, dir, dentry, mode);
1181 EXPORT_SYMBOL_GPL(security_inode_mkdir);
1183 int security_inode_rmdir(struct inode *dir, struct dentry *dentry)
1185 if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1187 return call_int_hook(inode_rmdir, 0, dir, dentry);
1190 int security_inode_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t dev)
1192 if (unlikely(IS_PRIVATE(dir)))
1194 return call_int_hook(inode_mknod, 0, dir, dentry, mode, dev);
1197 int security_inode_rename(struct inode *old_dir, struct dentry *old_dentry,
1198 struct inode *new_dir, struct dentry *new_dentry,
1201 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) ||
1202 (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry)))))
1205 if (flags & RENAME_EXCHANGE) {
1206 int err = call_int_hook(inode_rename, 0, new_dir, new_dentry,
1207 old_dir, old_dentry);
1212 return call_int_hook(inode_rename, 0, old_dir, old_dentry,
1213 new_dir, new_dentry);
1216 int security_inode_readlink(struct dentry *dentry)
1218 if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1220 return call_int_hook(inode_readlink, 0, dentry);
1223 int security_inode_follow_link(struct dentry *dentry, struct inode *inode,
1226 if (unlikely(IS_PRIVATE(inode)))
1228 return call_int_hook(inode_follow_link, 0, dentry, inode, rcu);
1231 int security_inode_permission(struct inode *inode, int mask)
1233 if (unlikely(IS_PRIVATE(inode)))
1235 return call_int_hook(inode_permission, 0, inode, mask);
1238 int security_inode_setattr(struct dentry *dentry, struct iattr *attr)
1242 if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1244 ret = call_int_hook(inode_setattr, 0, dentry, attr);
1247 return evm_inode_setattr(dentry, attr);
1249 EXPORT_SYMBOL_GPL(security_inode_setattr);
1251 int security_inode_getattr(const struct path *path)
1253 if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
1255 return call_int_hook(inode_getattr, 0, path);
1258 int security_inode_setxattr(struct dentry *dentry, const char *name,
1259 const void *value, size_t size, int flags)
1263 if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1266 * SELinux and Smack integrate the cap call,
1267 * so assume that all LSMs supplying this call do so.
1269 ret = call_int_hook(inode_setxattr, 1, dentry, name, value, size,
1273 ret = cap_inode_setxattr(dentry, name, value, size, flags);
1276 ret = ima_inode_setxattr(dentry, name, value, size);
1279 return evm_inode_setxattr(dentry, name, value, size);
1282 void security_inode_post_setxattr(struct dentry *dentry, const char *name,
1283 const void *value, size_t size, int flags)
1285 if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1287 call_void_hook(inode_post_setxattr, dentry, name, value, size, flags);
1288 evm_inode_post_setxattr(dentry, name, value, size);
1291 int security_inode_getxattr(struct dentry *dentry, const char *name)
1293 if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1295 return call_int_hook(inode_getxattr, 0, dentry, name);
1298 int security_inode_listxattr(struct dentry *dentry)
1300 if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1302 return call_int_hook(inode_listxattr, 0, dentry);
1305 int security_inode_removexattr(struct dentry *dentry, const char *name)
1309 if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1312 * SELinux and Smack integrate the cap call,
1313 * so assume that all LSMs supplying this call do so.
1315 ret = call_int_hook(inode_removexattr, 1, dentry, name);
1317 ret = cap_inode_removexattr(dentry, name);
1320 ret = ima_inode_removexattr(dentry, name);
1323 return evm_inode_removexattr(dentry, name);
1326 int security_inode_need_killpriv(struct dentry *dentry)
1328 return call_int_hook(inode_need_killpriv, 0, dentry);
1331 int security_inode_killpriv(struct dentry *dentry)
1333 return call_int_hook(inode_killpriv, 0, dentry);
1336 int security_inode_getsecurity(struct inode *inode, const char *name, void **buffer, bool alloc)
1338 struct security_hook_list *hp;
1341 if (unlikely(IS_PRIVATE(inode)))
1344 * Only one module will provide an attribute with a given name.
1346 hlist_for_each_entry(hp, &security_hook_heads.inode_getsecurity, list) {
1347 rc = hp->hook.inode_getsecurity(inode, name, buffer, alloc);
1348 if (rc != -EOPNOTSUPP)
1354 int security_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags)
1356 struct security_hook_list *hp;
1359 if (unlikely(IS_PRIVATE(inode)))
1362 * Only one module will provide an attribute with a given name.
1364 hlist_for_each_entry(hp, &security_hook_heads.inode_setsecurity, list) {
1365 rc = hp->hook.inode_setsecurity(inode, name, value, size,
1367 if (rc != -EOPNOTSUPP)
1373 int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size)
1375 if (unlikely(IS_PRIVATE(inode)))
1377 return call_int_hook(inode_listsecurity, 0, inode, buffer, buffer_size);
1379 EXPORT_SYMBOL(security_inode_listsecurity);
1381 void security_inode_getsecid(struct inode *inode, u32 *secid)
1383 call_void_hook(inode_getsecid, inode, secid);
1386 int security_inode_copy_up(struct dentry *src, struct cred **new)
1388 return call_int_hook(inode_copy_up, 0, src, new);
1390 EXPORT_SYMBOL(security_inode_copy_up);
1392 int security_inode_copy_up_xattr(const char *name)
1394 return call_int_hook(inode_copy_up_xattr, -EOPNOTSUPP, name);
1396 EXPORT_SYMBOL(security_inode_copy_up_xattr);
1398 int security_kernfs_init_security(struct kernfs_node *kn_dir,
1399 struct kernfs_node *kn)
1401 return call_int_hook(kernfs_init_security, 0, kn_dir, kn);
1404 int security_file_permission(struct file *file, int mask)
1408 ret = call_int_hook(file_permission, 0, file, mask);
1412 return fsnotify_perm(file, mask);
1415 int security_file_alloc(struct file *file)
1417 int rc = lsm_file_alloc(file);
1421 rc = call_int_hook(file_alloc_security, 0, file);
1423 security_file_free(file);
1427 void security_file_free(struct file *file)
1431 call_void_hook(file_free_security, file);
1433 blob = file->f_security;
1435 file->f_security = NULL;
1436 kmem_cache_free(lsm_file_cache, blob);
1440 int security_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1442 return call_int_hook(file_ioctl, 0, file, cmd, arg);
1445 static inline unsigned long mmap_prot(struct file *file, unsigned long prot)
1448 * Does we have PROT_READ and does the application expect
1449 * it to imply PROT_EXEC? If not, nothing to talk about...
1451 if ((prot & (PROT_READ | PROT_EXEC)) != PROT_READ)
1453 if (!(current->personality & READ_IMPLIES_EXEC))
1456 * if that's an anonymous mapping, let it.
1459 return prot | PROT_EXEC;
1461 * ditto if it's not on noexec mount, except that on !MMU we need
1462 * NOMMU_MAP_EXEC (== VM_MAYEXEC) in this case
1464 if (!path_noexec(&file->f_path)) {
1466 if (file->f_op->mmap_capabilities) {
1467 unsigned caps = file->f_op->mmap_capabilities(file);
1468 if (!(caps & NOMMU_MAP_EXEC))
1472 return prot | PROT_EXEC;
1474 /* anything on noexec mount won't get PROT_EXEC */
1478 int security_mmap_file(struct file *file, unsigned long prot,
1479 unsigned long flags)
1482 ret = call_int_hook(mmap_file, 0, file, prot,
1483 mmap_prot(file, prot), flags);
1486 return ima_file_mmap(file, prot);
1489 int security_mmap_addr(unsigned long addr)
1491 return call_int_hook(mmap_addr, 0, addr);
1494 int security_file_mprotect(struct vm_area_struct *vma, unsigned long reqprot,
1497 return call_int_hook(file_mprotect, 0, vma, reqprot, prot);
1500 int security_file_lock(struct file *file, unsigned int cmd)
1502 return call_int_hook(file_lock, 0, file, cmd);
1505 int security_file_fcntl(struct file *file, unsigned int cmd, unsigned long arg)
1507 return call_int_hook(file_fcntl, 0, file, cmd, arg);
1510 void security_file_set_fowner(struct file *file)
1512 call_void_hook(file_set_fowner, file);
1515 int security_file_send_sigiotask(struct task_struct *tsk,
1516 struct fown_struct *fown, int sig)
1518 return call_int_hook(file_send_sigiotask, 0, tsk, fown, sig);
1521 int security_file_receive(struct file *file)
1523 return call_int_hook(file_receive, 0, file);
1526 int security_file_open(struct file *file)
1530 ret = call_int_hook(file_open, 0, file);
1534 return fsnotify_perm(file, MAY_OPEN);
1537 int security_task_alloc(struct task_struct *task, unsigned long clone_flags)
1539 int rc = lsm_task_alloc(task);
1543 rc = call_int_hook(task_alloc, 0, task, clone_flags);
1545 security_task_free(task);
1549 void security_task_free(struct task_struct *task)
1551 call_void_hook(task_free, task);
1553 kfree(task->security);
1554 task->security = NULL;
1557 int security_cred_alloc_blank(struct cred *cred, gfp_t gfp)
1559 int rc = lsm_cred_alloc(cred, gfp);
1564 rc = call_int_hook(cred_alloc_blank, 0, cred, gfp);
1566 security_cred_free(cred);
1570 void security_cred_free(struct cred *cred)
1573 * There is a failure case in prepare_creds() that
1574 * may result in a call here with ->security being NULL.
1576 if (unlikely(cred->security == NULL))
1579 call_void_hook(cred_free, cred);
1581 kfree(cred->security);
1582 cred->security = NULL;
1585 int security_prepare_creds(struct cred *new, const struct cred *old, gfp_t gfp)
1587 int rc = lsm_cred_alloc(new, gfp);
1592 rc = call_int_hook(cred_prepare, 0, new, old, gfp);
1594 security_cred_free(new);
1598 void security_transfer_creds(struct cred *new, const struct cred *old)
1600 call_void_hook(cred_transfer, new, old);
1603 void security_cred_getsecid(const struct cred *c, u32 *secid)
1606 call_void_hook(cred_getsecid, c, secid);
1608 EXPORT_SYMBOL(security_cred_getsecid);
1610 int security_kernel_act_as(struct cred *new, u32 secid)
1612 return call_int_hook(kernel_act_as, 0, new, secid);
1615 int security_kernel_create_files_as(struct cred *new, struct inode *inode)
1617 return call_int_hook(kernel_create_files_as, 0, new, inode);
1620 int security_kernel_module_request(char *kmod_name)
1624 ret = call_int_hook(kernel_module_request, 0, kmod_name);
1627 return integrity_kernel_module_request(kmod_name);
1630 int security_kernel_read_file(struct file *file, enum kernel_read_file_id id)
1634 ret = call_int_hook(kernel_read_file, 0, file, id);
1637 return ima_read_file(file, id);
1639 EXPORT_SYMBOL_GPL(security_kernel_read_file);
1641 int security_kernel_post_read_file(struct file *file, char *buf, loff_t size,
1642 enum kernel_read_file_id id)
1646 ret = call_int_hook(kernel_post_read_file, 0, file, buf, size, id);
1649 return ima_post_read_file(file, buf, size, id);
1651 EXPORT_SYMBOL_GPL(security_kernel_post_read_file);
1653 int security_kernel_load_data(enum kernel_load_data_id id)
1657 ret = call_int_hook(kernel_load_data, 0, id);
1660 return ima_load_data(id);
1662 EXPORT_SYMBOL_GPL(security_kernel_load_data);
1664 int security_task_fix_setuid(struct cred *new, const struct cred *old,
1667 return call_int_hook(task_fix_setuid, 0, new, old, flags);
1670 int security_task_setpgid(struct task_struct *p, pid_t pgid)
1672 return call_int_hook(task_setpgid, 0, p, pgid);
1675 int security_task_getpgid(struct task_struct *p)
1677 return call_int_hook(task_getpgid, 0, p);
1680 int security_task_getsid(struct task_struct *p)
1682 return call_int_hook(task_getsid, 0, p);
1685 void security_task_getsecid(struct task_struct *p, u32 *secid)
1688 call_void_hook(task_getsecid, p, secid);
1690 EXPORT_SYMBOL(security_task_getsecid);
1692 int security_task_setnice(struct task_struct *p, int nice)
1694 return call_int_hook(task_setnice, 0, p, nice);
1697 int security_task_setioprio(struct task_struct *p, int ioprio)
1699 return call_int_hook(task_setioprio, 0, p, ioprio);
1702 int security_task_getioprio(struct task_struct *p)
1704 return call_int_hook(task_getioprio, 0, p);
1707 int security_task_prlimit(const struct cred *cred, const struct cred *tcred,
1710 return call_int_hook(task_prlimit, 0, cred, tcred, flags);
1713 int security_task_setrlimit(struct task_struct *p, unsigned int resource,
1714 struct rlimit *new_rlim)
1716 return call_int_hook(task_setrlimit, 0, p, resource, new_rlim);
1719 int security_task_setscheduler(struct task_struct *p)
1721 return call_int_hook(task_setscheduler, 0, p);
1724 int security_task_getscheduler(struct task_struct *p)
1726 return call_int_hook(task_getscheduler, 0, p);
1729 int security_task_movememory(struct task_struct *p)
1731 return call_int_hook(task_movememory, 0, p);
1734 int security_task_kill(struct task_struct *p, struct kernel_siginfo *info,
1735 int sig, const struct cred *cred)
1737 return call_int_hook(task_kill, 0, p, info, sig, cred);
1740 int security_task_prctl(int option, unsigned long arg2, unsigned long arg3,
1741 unsigned long arg4, unsigned long arg5)
1745 struct security_hook_list *hp;
1747 hlist_for_each_entry(hp, &security_hook_heads.task_prctl, list) {
1748 thisrc = hp->hook.task_prctl(option, arg2, arg3, arg4, arg5);
1749 if (thisrc != -ENOSYS) {
1758 void security_task_to_inode(struct task_struct *p, struct inode *inode)
1760 call_void_hook(task_to_inode, p, inode);
1763 int security_ipc_permission(struct kern_ipc_perm *ipcp, short flag)
1765 return call_int_hook(ipc_permission, 0, ipcp, flag);
1768 void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid)
1771 call_void_hook(ipc_getsecid, ipcp, secid);
1774 int security_msg_msg_alloc(struct msg_msg *msg)
1776 int rc = lsm_msg_msg_alloc(msg);
1780 rc = call_int_hook(msg_msg_alloc_security, 0, msg);
1782 security_msg_msg_free(msg);
1786 void security_msg_msg_free(struct msg_msg *msg)
1788 call_void_hook(msg_msg_free_security, msg);
1789 kfree(msg->security);
1790 msg->security = NULL;
1793 int security_msg_queue_alloc(struct kern_ipc_perm *msq)
1795 int rc = lsm_ipc_alloc(msq);
1799 rc = call_int_hook(msg_queue_alloc_security, 0, msq);
1801 security_msg_queue_free(msq);
1805 void security_msg_queue_free(struct kern_ipc_perm *msq)
1807 call_void_hook(msg_queue_free_security, msq);
1808 kfree(msq->security);
1809 msq->security = NULL;
1812 int security_msg_queue_associate(struct kern_ipc_perm *msq, int msqflg)
1814 return call_int_hook(msg_queue_associate, 0, msq, msqflg);
1817 int security_msg_queue_msgctl(struct kern_ipc_perm *msq, int cmd)
1819 return call_int_hook(msg_queue_msgctl, 0, msq, cmd);
1822 int security_msg_queue_msgsnd(struct kern_ipc_perm *msq,
1823 struct msg_msg *msg, int msqflg)
1825 return call_int_hook(msg_queue_msgsnd, 0, msq, msg, msqflg);
1828 int security_msg_queue_msgrcv(struct kern_ipc_perm *msq, struct msg_msg *msg,
1829 struct task_struct *target, long type, int mode)
1831 return call_int_hook(msg_queue_msgrcv, 0, msq, msg, target, type, mode);
1834 int security_shm_alloc(struct kern_ipc_perm *shp)
1836 int rc = lsm_ipc_alloc(shp);
1840 rc = call_int_hook(shm_alloc_security, 0, shp);
1842 security_shm_free(shp);
1846 void security_shm_free(struct kern_ipc_perm *shp)
1848 call_void_hook(shm_free_security, shp);
1849 kfree(shp->security);
1850 shp->security = NULL;
1853 int security_shm_associate(struct kern_ipc_perm *shp, int shmflg)
1855 return call_int_hook(shm_associate, 0, shp, shmflg);
1858 int security_shm_shmctl(struct kern_ipc_perm *shp, int cmd)
1860 return call_int_hook(shm_shmctl, 0, shp, cmd);
1863 int security_shm_shmat(struct kern_ipc_perm *shp, char __user *shmaddr, int shmflg)
1865 return call_int_hook(shm_shmat, 0, shp, shmaddr, shmflg);
1868 int security_sem_alloc(struct kern_ipc_perm *sma)
1870 int rc = lsm_ipc_alloc(sma);
1874 rc = call_int_hook(sem_alloc_security, 0, sma);
1876 security_sem_free(sma);
1880 void security_sem_free(struct kern_ipc_perm *sma)
1882 call_void_hook(sem_free_security, sma);
1883 kfree(sma->security);
1884 sma->security = NULL;
1887 int security_sem_associate(struct kern_ipc_perm *sma, int semflg)
1889 return call_int_hook(sem_associate, 0, sma, semflg);
1892 int security_sem_semctl(struct kern_ipc_perm *sma, int cmd)
1894 return call_int_hook(sem_semctl, 0, sma, cmd);
1897 int security_sem_semop(struct kern_ipc_perm *sma, struct sembuf *sops,
1898 unsigned nsops, int alter)
1900 return call_int_hook(sem_semop, 0, sma, sops, nsops, alter);
1903 void security_d_instantiate(struct dentry *dentry, struct inode *inode)
1905 if (unlikely(inode && IS_PRIVATE(inode)))
1907 call_void_hook(d_instantiate, dentry, inode);
1909 EXPORT_SYMBOL(security_d_instantiate);
1911 int security_getprocattr(struct task_struct *p, const char *lsm, char *name,
1914 struct security_hook_list *hp;
1916 hlist_for_each_entry(hp, &security_hook_heads.getprocattr, list) {
1917 if (lsm != NULL && strcmp(lsm, hp->lsm))
1919 return hp->hook.getprocattr(p, name, value);
1924 int security_setprocattr(const char *lsm, const char *name, void *value,
1927 struct security_hook_list *hp;
1929 hlist_for_each_entry(hp, &security_hook_heads.setprocattr, list) {
1930 if (lsm != NULL && strcmp(lsm, hp->lsm))
1932 return hp->hook.setprocattr(name, value, size);
1937 int security_netlink_send(struct sock *sk, struct sk_buff *skb)
1939 return call_int_hook(netlink_send, 0, sk, skb);
1942 int security_ismaclabel(const char *name)
1944 return call_int_hook(ismaclabel, 0, name);
1946 EXPORT_SYMBOL(security_ismaclabel);
1948 int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
1950 return call_int_hook(secid_to_secctx, -EOPNOTSUPP, secid, secdata,
1953 EXPORT_SYMBOL(security_secid_to_secctx);
1955 int security_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid)
1958 return call_int_hook(secctx_to_secid, 0, secdata, seclen, secid);
1960 EXPORT_SYMBOL(security_secctx_to_secid);
1962 void security_release_secctx(char *secdata, u32 seclen)
1964 call_void_hook(release_secctx, secdata, seclen);
1966 EXPORT_SYMBOL(security_release_secctx);
1968 void security_inode_invalidate_secctx(struct inode *inode)
1970 call_void_hook(inode_invalidate_secctx, inode);
1972 EXPORT_SYMBOL(security_inode_invalidate_secctx);
1974 int security_inode_notifysecctx(struct inode *inode, void *ctx, u32 ctxlen)
1976 return call_int_hook(inode_notifysecctx, 0, inode, ctx, ctxlen);
1978 EXPORT_SYMBOL(security_inode_notifysecctx);
1980 int security_inode_setsecctx(struct dentry *dentry, void *ctx, u32 ctxlen)
1982 return call_int_hook(inode_setsecctx, 0, dentry, ctx, ctxlen);
1984 EXPORT_SYMBOL(security_inode_setsecctx);
1986 int security_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen)
1988 return call_int_hook(inode_getsecctx, -EOPNOTSUPP, inode, ctx, ctxlen);
1990 EXPORT_SYMBOL(security_inode_getsecctx);
1992 #ifdef CONFIG_SECURITY_NETWORK
1994 int security_unix_stream_connect(struct sock *sock, struct sock *other, struct sock *newsk)
1996 return call_int_hook(unix_stream_connect, 0, sock, other, newsk);
1998 EXPORT_SYMBOL(security_unix_stream_connect);
2000 int security_unix_may_send(struct socket *sock, struct socket *other)
2002 return call_int_hook(unix_may_send, 0, sock, other);
2004 EXPORT_SYMBOL(security_unix_may_send);
2006 int security_socket_create(int family, int type, int protocol, int kern)
2008 return call_int_hook(socket_create, 0, family, type, protocol, kern);
2011 int security_socket_post_create(struct socket *sock, int family,
2012 int type, int protocol, int kern)
2014 return call_int_hook(socket_post_create, 0, sock, family, type,
2018 int security_socket_socketpair(struct socket *socka, struct socket *sockb)
2020 return call_int_hook(socket_socketpair, 0, socka, sockb);
2022 EXPORT_SYMBOL(security_socket_socketpair);
2024 int security_socket_bind(struct socket *sock, struct sockaddr *address, int addrlen)
2026 return call_int_hook(socket_bind, 0, sock, address, addrlen);
2029 int security_socket_connect(struct socket *sock, struct sockaddr *address, int addrlen)
2031 return call_int_hook(socket_connect, 0, sock, address, addrlen);
2034 int security_socket_listen(struct socket *sock, int backlog)
2036 return call_int_hook(socket_listen, 0, sock, backlog);
2039 int security_socket_accept(struct socket *sock, struct socket *newsock)
2041 return call_int_hook(socket_accept, 0, sock, newsock);
2044 int security_socket_sendmsg(struct socket *sock, struct msghdr *msg, int size)
2046 return call_int_hook(socket_sendmsg, 0, sock, msg, size);
2049 int security_socket_recvmsg(struct socket *sock, struct msghdr *msg,
2050 int size, int flags)
2052 return call_int_hook(socket_recvmsg, 0, sock, msg, size, flags);
2055 int security_socket_getsockname(struct socket *sock)
2057 return call_int_hook(socket_getsockname, 0, sock);
2060 int security_socket_getpeername(struct socket *sock)
2062 return call_int_hook(socket_getpeername, 0, sock);
2065 int security_socket_getsockopt(struct socket *sock, int level, int optname)
2067 return call_int_hook(socket_getsockopt, 0, sock, level, optname);
2070 int security_socket_setsockopt(struct socket *sock, int level, int optname)
2072 return call_int_hook(socket_setsockopt, 0, sock, level, optname);
2075 int security_socket_shutdown(struct socket *sock, int how)
2077 return call_int_hook(socket_shutdown, 0, sock, how);
2080 int security_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
2082 return call_int_hook(socket_sock_rcv_skb, 0, sk, skb);
2084 EXPORT_SYMBOL(security_sock_rcv_skb);
2086 int security_socket_getpeersec_stream(struct socket *sock, char __user *optval,
2087 int __user *optlen, unsigned len)
2089 return call_int_hook(socket_getpeersec_stream, -ENOPROTOOPT, sock,
2090 optval, optlen, len);
2093 int security_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb, u32 *secid)
2095 return call_int_hook(socket_getpeersec_dgram, -ENOPROTOOPT, sock,
2098 EXPORT_SYMBOL(security_socket_getpeersec_dgram);
2100 int security_sk_alloc(struct sock *sk, int family, gfp_t priority)
2102 return call_int_hook(sk_alloc_security, 0, sk, family, priority);
2105 void security_sk_free(struct sock *sk)
2107 call_void_hook(sk_free_security, sk);
2110 void security_sk_clone(const struct sock *sk, struct sock *newsk)
2112 call_void_hook(sk_clone_security, sk, newsk);
2114 EXPORT_SYMBOL(security_sk_clone);
2116 void security_sk_classify_flow(struct sock *sk, struct flowi *fl)
2118 call_void_hook(sk_getsecid, sk, &fl->flowi_secid);
2120 EXPORT_SYMBOL(security_sk_classify_flow);
2122 void security_req_classify_flow(const struct request_sock *req, struct flowi *fl)
2124 call_void_hook(req_classify_flow, req, fl);
2126 EXPORT_SYMBOL(security_req_classify_flow);
2128 void security_sock_graft(struct sock *sk, struct socket *parent)
2130 call_void_hook(sock_graft, sk, parent);
2132 EXPORT_SYMBOL(security_sock_graft);
2134 int security_inet_conn_request(struct sock *sk,
2135 struct sk_buff *skb, struct request_sock *req)
2137 return call_int_hook(inet_conn_request, 0, sk, skb, req);
2139 EXPORT_SYMBOL(security_inet_conn_request);
2141 void security_inet_csk_clone(struct sock *newsk,
2142 const struct request_sock *req)
2144 call_void_hook(inet_csk_clone, newsk, req);
2147 void security_inet_conn_established(struct sock *sk,
2148 struct sk_buff *skb)
2150 call_void_hook(inet_conn_established, sk, skb);
2152 EXPORT_SYMBOL(security_inet_conn_established);
2154 int security_secmark_relabel_packet(u32 secid)
2156 return call_int_hook(secmark_relabel_packet, 0, secid);
2158 EXPORT_SYMBOL(security_secmark_relabel_packet);
2160 void security_secmark_refcount_inc(void)
2162 call_void_hook(secmark_refcount_inc);
2164 EXPORT_SYMBOL(security_secmark_refcount_inc);
2166 void security_secmark_refcount_dec(void)
2168 call_void_hook(secmark_refcount_dec);
2170 EXPORT_SYMBOL(security_secmark_refcount_dec);
2172 int security_tun_dev_alloc_security(void **security)
2174 return call_int_hook(tun_dev_alloc_security, 0, security);
2176 EXPORT_SYMBOL(security_tun_dev_alloc_security);
2178 void security_tun_dev_free_security(void *security)
2180 call_void_hook(tun_dev_free_security, security);
2182 EXPORT_SYMBOL(security_tun_dev_free_security);
2184 int security_tun_dev_create(void)
2186 return call_int_hook(tun_dev_create, 0);
2188 EXPORT_SYMBOL(security_tun_dev_create);
2190 int security_tun_dev_attach_queue(void *security)
2192 return call_int_hook(tun_dev_attach_queue, 0, security);
2194 EXPORT_SYMBOL(security_tun_dev_attach_queue);
2196 int security_tun_dev_attach(struct sock *sk, void *security)
2198 return call_int_hook(tun_dev_attach, 0, sk, security);
2200 EXPORT_SYMBOL(security_tun_dev_attach);
2202 int security_tun_dev_open(void *security)
2204 return call_int_hook(tun_dev_open, 0, security);
2206 EXPORT_SYMBOL(security_tun_dev_open);
2208 int security_sctp_assoc_request(struct sctp_endpoint *ep, struct sk_buff *skb)
2210 return call_int_hook(sctp_assoc_request, 0, ep, skb);
2212 EXPORT_SYMBOL(security_sctp_assoc_request);
2214 int security_sctp_bind_connect(struct sock *sk, int optname,
2215 struct sockaddr *address, int addrlen)
2217 return call_int_hook(sctp_bind_connect, 0, sk, optname,
2220 EXPORT_SYMBOL(security_sctp_bind_connect);
2222 void security_sctp_sk_clone(struct sctp_endpoint *ep, struct sock *sk,
2225 call_void_hook(sctp_sk_clone, ep, sk, newsk);
2227 EXPORT_SYMBOL(security_sctp_sk_clone);
2229 #endif /* CONFIG_SECURITY_NETWORK */
2231 #ifdef CONFIG_SECURITY_INFINIBAND
2233 int security_ib_pkey_access(void *sec, u64 subnet_prefix, u16 pkey)
2235 return call_int_hook(ib_pkey_access, 0, sec, subnet_prefix, pkey);
2237 EXPORT_SYMBOL(security_ib_pkey_access);
2239 int security_ib_endport_manage_subnet(void *sec, const char *dev_name, u8 port_num)
2241 return call_int_hook(ib_endport_manage_subnet, 0, sec, dev_name, port_num);
2243 EXPORT_SYMBOL(security_ib_endport_manage_subnet);
2245 int security_ib_alloc_security(void **sec)
2247 return call_int_hook(ib_alloc_security, 0, sec);
2249 EXPORT_SYMBOL(security_ib_alloc_security);
2251 void security_ib_free_security(void *sec)
2253 call_void_hook(ib_free_security, sec);
2255 EXPORT_SYMBOL(security_ib_free_security);
2256 #endif /* CONFIG_SECURITY_INFINIBAND */
2258 #ifdef CONFIG_SECURITY_NETWORK_XFRM
2260 int security_xfrm_policy_alloc(struct xfrm_sec_ctx **ctxp,
2261 struct xfrm_user_sec_ctx *sec_ctx,
2264 return call_int_hook(xfrm_policy_alloc_security, 0, ctxp, sec_ctx, gfp);
2266 EXPORT_SYMBOL(security_xfrm_policy_alloc);
2268 int security_xfrm_policy_clone(struct xfrm_sec_ctx *old_ctx,
2269 struct xfrm_sec_ctx **new_ctxp)
2271 return call_int_hook(xfrm_policy_clone_security, 0, old_ctx, new_ctxp);
2274 void security_xfrm_policy_free(struct xfrm_sec_ctx *ctx)
2276 call_void_hook(xfrm_policy_free_security, ctx);
2278 EXPORT_SYMBOL(security_xfrm_policy_free);
2280 int security_xfrm_policy_delete(struct xfrm_sec_ctx *ctx)
2282 return call_int_hook(xfrm_policy_delete_security, 0, ctx);
2285 int security_xfrm_state_alloc(struct xfrm_state *x,
2286 struct xfrm_user_sec_ctx *sec_ctx)
2288 return call_int_hook(xfrm_state_alloc, 0, x, sec_ctx);
2290 EXPORT_SYMBOL(security_xfrm_state_alloc);
2292 int security_xfrm_state_alloc_acquire(struct xfrm_state *x,
2293 struct xfrm_sec_ctx *polsec, u32 secid)
2295 return call_int_hook(xfrm_state_alloc_acquire, 0, x, polsec, secid);
2298 int security_xfrm_state_delete(struct xfrm_state *x)
2300 return call_int_hook(xfrm_state_delete_security, 0, x);
2302 EXPORT_SYMBOL(security_xfrm_state_delete);
2304 void security_xfrm_state_free(struct xfrm_state *x)
2306 call_void_hook(xfrm_state_free_security, x);
2309 int security_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir)
2311 return call_int_hook(xfrm_policy_lookup, 0, ctx, fl_secid, dir);
2314 int security_xfrm_state_pol_flow_match(struct xfrm_state *x,
2315 struct xfrm_policy *xp,
2316 const struct flowi *fl)
2318 struct security_hook_list *hp;
2322 * Since this function is expected to return 0 or 1, the judgment
2323 * becomes difficult if multiple LSMs supply this call. Fortunately,
2324 * we can use the first LSM's judgment because currently only SELinux
2325 * supplies this call.
2327 * For speed optimization, we explicitly break the loop rather than
2330 hlist_for_each_entry(hp, &security_hook_heads.xfrm_state_pol_flow_match,
2332 rc = hp->hook.xfrm_state_pol_flow_match(x, xp, fl);
2338 int security_xfrm_decode_session(struct sk_buff *skb, u32 *secid)
2340 return call_int_hook(xfrm_decode_session, 0, skb, secid, 1);
2343 void security_skb_classify_flow(struct sk_buff *skb, struct flowi *fl)
2345 int rc = call_int_hook(xfrm_decode_session, 0, skb, &fl->flowi_secid,
2350 EXPORT_SYMBOL(security_skb_classify_flow);
2352 #endif /* CONFIG_SECURITY_NETWORK_XFRM */
2356 int security_key_alloc(struct key *key, const struct cred *cred,
2357 unsigned long flags)
2359 return call_int_hook(key_alloc, 0, key, cred, flags);
2362 void security_key_free(struct key *key)
2364 call_void_hook(key_free, key);
2367 int security_key_permission(key_ref_t key_ref,
2368 const struct cred *cred, unsigned perm)
2370 return call_int_hook(key_permission, 0, key_ref, cred, perm);
2373 int security_key_getsecurity(struct key *key, char **_buffer)
2376 return call_int_hook(key_getsecurity, 0, key, _buffer);
2379 #endif /* CONFIG_KEYS */
2383 int security_audit_rule_init(u32 field, u32 op, char *rulestr, void **lsmrule)
2385 return call_int_hook(audit_rule_init, 0, field, op, rulestr, lsmrule);
2388 int security_audit_rule_known(struct audit_krule *krule)
2390 return call_int_hook(audit_rule_known, 0, krule);
2393 void security_audit_rule_free(void *lsmrule)
2395 call_void_hook(audit_rule_free, lsmrule);
2398 int security_audit_rule_match(u32 secid, u32 field, u32 op, void *lsmrule)
2400 return call_int_hook(audit_rule_match, 0, secid, field, op, lsmrule);
2402 #endif /* CONFIG_AUDIT */
2404 #ifdef CONFIG_BPF_SYSCALL
2405 int security_bpf(int cmd, union bpf_attr *attr, unsigned int size)
2407 return call_int_hook(bpf, 0, cmd, attr, size);
2409 int security_bpf_map(struct bpf_map *map, fmode_t fmode)
2411 return call_int_hook(bpf_map, 0, map, fmode);
2413 int security_bpf_prog(struct bpf_prog *prog)
2415 return call_int_hook(bpf_prog, 0, prog);
2417 int security_bpf_map_alloc(struct bpf_map *map)
2419 return call_int_hook(bpf_map_alloc_security, 0, map);
2421 int security_bpf_prog_alloc(struct bpf_prog_aux *aux)
2423 return call_int_hook(bpf_prog_alloc_security, 0, aux);
2425 void security_bpf_map_free(struct bpf_map *map)
2427 call_void_hook(bpf_map_free_security, map);
2429 void security_bpf_prog_free(struct bpf_prog_aux *aux)
2431 call_void_hook(bpf_prog_free_security, aux);
2433 #endif /* CONFIG_BPF_SYSCALL */
2435 int security_locked_down(enum lockdown_reason what)
2437 return call_int_hook(locked_down, 0, what);
2439 EXPORT_SYMBOL(security_locked_down);
2441 #ifdef CONFIG_PERF_EVENTS
2442 int security_perf_event_open(struct perf_event_attr *attr, int type)
2444 return call_int_hook(perf_event_open, 0, attr, type);
2447 int security_perf_event_alloc(struct perf_event *event)
2449 return call_int_hook(perf_event_alloc, 0, event);
2452 void security_perf_event_free(struct perf_event *event)
2454 call_void_hook(perf_event_free, event);
2457 int security_perf_event_read(struct perf_event *event)
2459 return call_int_hook(perf_event_read, 0, event);
2462 int security_perf_event_write(struct perf_event *event)
2464 return call_int_hook(perf_event_write, 0, event);
2466 #endif /* CONFIG_PERF_EVENTS */