2 * Security plug functions
4 * Copyright (C) 2001 WireX Communications, Inc <chris@wirex.com>
5 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
6 * Copyright (C) 2001 Networks Associates Technology, Inc <ssmalley@nai.com>
7 * Copyright (C) 2016 Mellanox Technologies
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
15 #define pr_fmt(fmt) "LSM: " fmt
17 #include <linux/bpf.h>
18 #include <linux/capability.h>
19 #include <linux/dcache.h>
20 #include <linux/export.h>
21 #include <linux/init.h>
22 #include <linux/kernel.h>
23 #include <linux/lsm_hooks.h>
24 #include <linux/integrity.h>
25 #include <linux/ima.h>
26 #include <linux/evm.h>
27 #include <linux/fsnotify.h>
28 #include <linux/mman.h>
29 #include <linux/mount.h>
30 #include <linux/personality.h>
31 #include <linux/backing-dev.h>
32 #include <linux/string.h>
33 #include <linux/msg.h>
36 #define MAX_LSM_EVM_XATTR 2
38 /* How many LSMs were built into the kernel? */
39 #define LSM_COUNT (__end_lsm_info - __start_lsm_info)
41 struct security_hook_heads security_hook_heads __lsm_ro_after_init
;
42 static ATOMIC_NOTIFIER_HEAD(lsm_notifier_chain
);
44 static struct kmem_cache
*lsm_file_cache
;
45 static struct kmem_cache
*lsm_inode_cache
;
48 static struct lsm_blob_sizes blob_sizes __lsm_ro_after_init
;
50 /* Boot-time LSM user choice */
51 static __initdata
const char *chosen_lsm_order
;
52 static __initdata
const char *chosen_major_lsm
;
54 static __initconst
const char * const builtin_lsm_order
= CONFIG_LSM
;
56 /* Ordered list of LSMs to initialize. */
57 static __initdata
struct lsm_info
**ordered_lsms
;
58 static __initdata
struct lsm_info
*exclusive
;
60 static __initdata
bool debug
;
61 #define init_debug(...) \
64 pr_info(__VA_ARGS__); \
67 static bool __init
is_enabled(struct lsm_info
*lsm
)
75 /* Mark an LSM's enabled flag. */
76 static int lsm_enabled_true __initdata
= 1;
77 static int lsm_enabled_false __initdata
= 0;
78 static void __init
set_enabled(struct lsm_info
*lsm
, bool enabled
)
81 * When an LSM hasn't configured an enable variable, we can use
82 * a hard-coded location for storing the default enabled state.
86 lsm
->enabled
= &lsm_enabled_true
;
88 lsm
->enabled
= &lsm_enabled_false
;
89 } else if (lsm
->enabled
== &lsm_enabled_true
) {
91 lsm
->enabled
= &lsm_enabled_false
;
92 } else if (lsm
->enabled
== &lsm_enabled_false
) {
94 lsm
->enabled
= &lsm_enabled_true
;
96 *lsm
->enabled
= enabled
;
100 /* Is an LSM already listed in the ordered LSMs list? */
101 static bool __init
exists_ordered_lsm(struct lsm_info
*lsm
)
103 struct lsm_info
**check
;
105 for (check
= ordered_lsms
; *check
; check
++)
112 /* Append an LSM to the list of ordered LSMs to initialize. */
113 static int last_lsm __initdata
;
114 static void __init
append_ordered_lsm(struct lsm_info
*lsm
, const char *from
)
116 /* Ignore duplicate selections. */
117 if (exists_ordered_lsm(lsm
))
120 if (WARN(last_lsm
== LSM_COUNT
, "%s: out of LSM slots!?\n", from
))
123 /* Enable this LSM, if it is not already set. */
125 lsm
->enabled
= &lsm_enabled_true
;
126 ordered_lsms
[last_lsm
++] = lsm
;
128 init_debug("%s ordering: %s (%sabled)\n", from
, lsm
->name
,
129 is_enabled(lsm
) ? "en" : "dis");
132 /* Is an LSM allowed to be initialized? */
133 static bool __init
lsm_allowed(struct lsm_info
*lsm
)
135 /* Skip if the LSM is disabled. */
136 if (!is_enabled(lsm
))
139 /* Not allowed if another exclusive LSM already initialized. */
140 if ((lsm
->flags
& LSM_FLAG_EXCLUSIVE
) && exclusive
) {
141 init_debug("exclusive disabled: %s\n", lsm
->name
);
148 static void __init
lsm_set_blob_size(int *need
, int *lbs
)
159 static void __init
lsm_set_blob_sizes(struct lsm_blob_sizes
*needed
)
164 lsm_set_blob_size(&needed
->lbs_cred
, &blob_sizes
.lbs_cred
);
165 lsm_set_blob_size(&needed
->lbs_file
, &blob_sizes
.lbs_file
);
167 * The inode blob gets an rcu_head in addition to
168 * what the modules might need.
170 if (needed
->lbs_inode
&& blob_sizes
.lbs_inode
== 0)
171 blob_sizes
.lbs_inode
= sizeof(struct rcu_head
);
172 lsm_set_blob_size(&needed
->lbs_inode
, &blob_sizes
.lbs_inode
);
173 lsm_set_blob_size(&needed
->lbs_ipc
, &blob_sizes
.lbs_ipc
);
174 lsm_set_blob_size(&needed
->lbs_msg_msg
, &blob_sizes
.lbs_msg_msg
);
175 lsm_set_blob_size(&needed
->lbs_task
, &blob_sizes
.lbs_task
);
178 /* Prepare LSM for initialization. */
179 static void __init
prepare_lsm(struct lsm_info
*lsm
)
181 int enabled
= lsm_allowed(lsm
);
183 /* Record enablement (to handle any following exclusive LSMs). */
184 set_enabled(lsm
, enabled
);
186 /* If enabled, do pre-initialization work. */
188 if ((lsm
->flags
& LSM_FLAG_EXCLUSIVE
) && !exclusive
) {
190 init_debug("exclusive chosen: %s\n", lsm
->name
);
193 lsm_set_blob_sizes(lsm
->blobs
);
197 /* Initialize a given LSM, if it is enabled. */
198 static void __init
initialize_lsm(struct lsm_info
*lsm
)
200 if (is_enabled(lsm
)) {
203 init_debug("initializing %s\n", lsm
->name
);
205 WARN(ret
, "%s failed to initialize: %d\n", lsm
->name
, ret
);
209 /* Populate ordered LSMs list from comma-separated LSM name list. */
210 static void __init
ordered_lsm_parse(const char *order
, const char *origin
)
212 struct lsm_info
*lsm
;
213 char *sep
, *name
, *next
;
215 /* LSM_ORDER_FIRST is always first. */
216 for (lsm
= __start_lsm_info
; lsm
< __end_lsm_info
; lsm
++) {
217 if (lsm
->order
== LSM_ORDER_FIRST
)
218 append_ordered_lsm(lsm
, "first");
221 /* Process "security=", if given. */
222 if (chosen_major_lsm
) {
223 struct lsm_info
*major
;
226 * To match the original "security=" behavior, this
227 * explicitly does NOT fallback to another Legacy Major
228 * if the selected one was separately disabled: disable
229 * all non-matching Legacy Major LSMs.
231 for (major
= __start_lsm_info
; major
< __end_lsm_info
;
233 if ((major
->flags
& LSM_FLAG_LEGACY_MAJOR
) &&
234 strcmp(major
->name
, chosen_major_lsm
) != 0) {
235 set_enabled(major
, false);
236 init_debug("security=%s disabled: %s\n",
237 chosen_major_lsm
, major
->name
);
242 sep
= kstrdup(order
, GFP_KERNEL
);
244 /* Walk the list, looking for matching LSMs. */
245 while ((name
= strsep(&next
, ",")) != NULL
) {
248 for (lsm
= __start_lsm_info
; lsm
< __end_lsm_info
; lsm
++) {
249 if (lsm
->order
== LSM_ORDER_MUTABLE
&&
250 strcmp(lsm
->name
, name
) == 0) {
251 append_ordered_lsm(lsm
, origin
);
257 init_debug("%s ignored: %s\n", origin
, name
);
260 /* Process "security=", if given. */
261 if (chosen_major_lsm
) {
262 for (lsm
= __start_lsm_info
; lsm
< __end_lsm_info
; lsm
++) {
263 if (exists_ordered_lsm(lsm
))
265 if (strcmp(lsm
->name
, chosen_major_lsm
) == 0)
266 append_ordered_lsm(lsm
, "security=");
270 /* Disable all LSMs not in the ordered list. */
271 for (lsm
= __start_lsm_info
; lsm
< __end_lsm_info
; lsm
++) {
272 if (exists_ordered_lsm(lsm
))
274 set_enabled(lsm
, false);
275 init_debug("%s disabled: %s\n", origin
, lsm
->name
);
281 static void __init
lsm_early_cred(struct cred
*cred
);
282 static void __init
lsm_early_task(struct task_struct
*task
);
284 static void __init
ordered_lsm_init(void)
286 struct lsm_info
**lsm
;
288 ordered_lsms
= kcalloc(LSM_COUNT
+ 1, sizeof(*ordered_lsms
),
291 if (chosen_lsm_order
) {
292 if (chosen_major_lsm
) {
293 pr_info("security= is ignored because it is superseded by lsm=\n");
294 chosen_major_lsm
= NULL
;
296 ordered_lsm_parse(chosen_lsm_order
, "cmdline");
298 ordered_lsm_parse(builtin_lsm_order
, "builtin");
300 for (lsm
= ordered_lsms
; *lsm
; lsm
++)
303 init_debug("cred blob size = %d\n", blob_sizes
.lbs_cred
);
304 init_debug("file blob size = %d\n", blob_sizes
.lbs_file
);
305 init_debug("inode blob size = %d\n", blob_sizes
.lbs_inode
);
306 init_debug("ipc blob size = %d\n", blob_sizes
.lbs_ipc
);
307 init_debug("msg_msg blob size = %d\n", blob_sizes
.lbs_msg_msg
);
308 init_debug("task blob size = %d\n", blob_sizes
.lbs_task
);
311 * Create any kmem_caches needed for blobs
313 if (blob_sizes
.lbs_file
)
314 lsm_file_cache
= kmem_cache_create("lsm_file_cache",
315 blob_sizes
.lbs_file
, 0,
317 if (blob_sizes
.lbs_inode
)
318 lsm_inode_cache
= kmem_cache_create("lsm_inode_cache",
319 blob_sizes
.lbs_inode
, 0,
322 lsm_early_cred((struct cred
*) current
->cred
);
323 lsm_early_task(current
);
324 for (lsm
= ordered_lsms
; *lsm
; lsm
++)
325 initialize_lsm(*lsm
);
331 * security_init - initializes the security framework
333 * This should be called early in the kernel initialization sequence.
335 int __init
security_init(void)
338 struct hlist_head
*list
= (struct hlist_head
*) &security_hook_heads
;
340 pr_info("Security Framework initializing\n");
342 for (i
= 0; i
< sizeof(security_hook_heads
) / sizeof(struct hlist_head
);
344 INIT_HLIST_HEAD(&list
[i
]);
346 /* Load LSMs in specified order. */
352 /* Save user chosen LSM */
353 static int __init
choose_major_lsm(char *str
)
355 chosen_major_lsm
= str
;
358 __setup("security=", choose_major_lsm
);
360 /* Explicitly choose LSM initialization order. */
361 static int __init
choose_lsm_order(char *str
)
363 chosen_lsm_order
= str
;
366 __setup("lsm=", choose_lsm_order
);
368 /* Enable LSM order debugging. */
369 static int __init
enable_debug(char *str
)
374 __setup("lsm.debug", enable_debug
);
376 static bool match_last_lsm(const char *list
, const char *lsm
)
380 if (WARN_ON(!list
|| !lsm
))
382 last
= strrchr(list
, ',');
384 /* Pass the comma, strcmp() will check for '\0' */
388 return !strcmp(last
, lsm
);
391 static int lsm_append(char *new, char **result
)
395 if (*result
== NULL
) {
396 *result
= kstrdup(new, GFP_KERNEL
);
400 /* Check if it is the last registered name */
401 if (match_last_lsm(*result
, new))
403 cp
= kasprintf(GFP_KERNEL
, "%s,%s", *result
, new);
413 * security_add_hooks - Add a modules hooks to the hook lists.
414 * @hooks: the hooks to add
415 * @count: the number of hooks to add
416 * @lsm: the name of the security module
418 * Each LSM has to register its hooks with the infrastructure.
420 void __init
security_add_hooks(struct security_hook_list
*hooks
, int count
,
425 for (i
= 0; i
< count
; i
++) {
427 hlist_add_tail_rcu(&hooks
[i
].list
, hooks
[i
].head
);
429 if (lsm_append(lsm
, &lsm_names
) < 0)
430 panic("%s - Cannot get early memory.\n", __func__
);
433 int call_lsm_notifier(enum lsm_event event
, void *data
)
435 return atomic_notifier_call_chain(&lsm_notifier_chain
, event
, data
);
437 EXPORT_SYMBOL(call_lsm_notifier
);
439 int register_lsm_notifier(struct notifier_block
*nb
)
441 return atomic_notifier_chain_register(&lsm_notifier_chain
, nb
);
443 EXPORT_SYMBOL(register_lsm_notifier
);
445 int unregister_lsm_notifier(struct notifier_block
*nb
)
447 return atomic_notifier_chain_unregister(&lsm_notifier_chain
, nb
);
449 EXPORT_SYMBOL(unregister_lsm_notifier
);
452 * lsm_cred_alloc - allocate a composite cred blob
453 * @cred: the cred that needs a blob
454 * @gfp: allocation type
456 * Allocate the cred blob for all the modules
458 * Returns 0, or -ENOMEM if memory can't be allocated.
460 static int lsm_cred_alloc(struct cred
*cred
, gfp_t gfp
)
462 if (blob_sizes
.lbs_cred
== 0) {
463 cred
->security
= NULL
;
467 cred
->security
= kzalloc(blob_sizes
.lbs_cred
, gfp
);
468 if (cred
->security
== NULL
)
474 * lsm_early_cred - during initialization allocate a composite cred blob
475 * @cred: the cred that needs a blob
477 * Allocate the cred blob for all the modules
479 static void __init
lsm_early_cred(struct cred
*cred
)
481 int rc
= lsm_cred_alloc(cred
, GFP_KERNEL
);
484 panic("%s: Early cred alloc failed.\n", __func__
);
488 * lsm_file_alloc - allocate a composite file blob
489 * @file: the file that needs a blob
491 * Allocate the file blob for all the modules
493 * Returns 0, or -ENOMEM if memory can't be allocated.
495 static int lsm_file_alloc(struct file
*file
)
497 if (!lsm_file_cache
) {
498 file
->f_security
= NULL
;
502 file
->f_security
= kmem_cache_zalloc(lsm_file_cache
, GFP_KERNEL
);
503 if (file
->f_security
== NULL
)
509 * lsm_inode_alloc - allocate a composite inode blob
510 * @inode: the inode that needs a blob
512 * Allocate the inode blob for all the modules
514 * Returns 0, or -ENOMEM if memory can't be allocated.
516 int lsm_inode_alloc(struct inode
*inode
)
518 if (!lsm_inode_cache
) {
519 inode
->i_security
= NULL
;
523 inode
->i_security
= kmem_cache_zalloc(lsm_inode_cache
, GFP_NOFS
);
524 if (inode
->i_security
== NULL
)
530 * lsm_task_alloc - allocate a composite task blob
531 * @task: the task that needs a blob
533 * Allocate the task blob for all the modules
535 * Returns 0, or -ENOMEM if memory can't be allocated.
537 static int lsm_task_alloc(struct task_struct
*task
)
539 if (blob_sizes
.lbs_task
== 0) {
540 task
->security
= NULL
;
544 task
->security
= kzalloc(blob_sizes
.lbs_task
, GFP_KERNEL
);
545 if (task
->security
== NULL
)
551 * lsm_ipc_alloc - allocate a composite ipc blob
552 * @kip: the ipc that needs a blob
554 * Allocate the ipc blob for all the modules
556 * Returns 0, or -ENOMEM if memory can't be allocated.
558 static int lsm_ipc_alloc(struct kern_ipc_perm
*kip
)
560 if (blob_sizes
.lbs_ipc
== 0) {
561 kip
->security
= NULL
;
565 kip
->security
= kzalloc(blob_sizes
.lbs_ipc
, GFP_KERNEL
);
566 if (kip
->security
== NULL
)
572 * lsm_msg_msg_alloc - allocate a composite msg_msg blob
573 * @mp: the msg_msg that needs a blob
575 * Allocate the ipc blob for all the modules
577 * Returns 0, or -ENOMEM if memory can't be allocated.
579 static int lsm_msg_msg_alloc(struct msg_msg
*mp
)
581 if (blob_sizes
.lbs_msg_msg
== 0) {
586 mp
->security
= kzalloc(blob_sizes
.lbs_msg_msg
, GFP_KERNEL
);
587 if (mp
->security
== NULL
)
593 * lsm_early_task - during initialization allocate a composite task blob
594 * @task: the task that needs a blob
596 * Allocate the task blob for all the modules
598 static void __init
lsm_early_task(struct task_struct
*task
)
600 int rc
= lsm_task_alloc(task
);
603 panic("%s: Early task alloc failed.\n", __func__
);
607 * Hook list operation macros.
610 * This is a hook that does not return a value.
613 * This is a hook that returns a value.
616 #define call_void_hook(FUNC, ...) \
618 struct security_hook_list *P; \
620 hlist_for_each_entry(P, &security_hook_heads.FUNC, list) \
621 P->hook.FUNC(__VA_ARGS__); \
624 #define call_int_hook(FUNC, IRC, ...) ({ \
627 struct security_hook_list *P; \
629 hlist_for_each_entry(P, &security_hook_heads.FUNC, list) { \
630 RC = P->hook.FUNC(__VA_ARGS__); \
638 /* Security operations */
640 int security_binder_set_context_mgr(struct task_struct
*mgr
)
642 return call_int_hook(binder_set_context_mgr
, 0, mgr
);
645 int security_binder_transaction(struct task_struct
*from
,
646 struct task_struct
*to
)
648 return call_int_hook(binder_transaction
, 0, from
, to
);
651 int security_binder_transfer_binder(struct task_struct
*from
,
652 struct task_struct
*to
)
654 return call_int_hook(binder_transfer_binder
, 0, from
, to
);
657 int security_binder_transfer_file(struct task_struct
*from
,
658 struct task_struct
*to
, struct file
*file
)
660 return call_int_hook(binder_transfer_file
, 0, from
, to
, file
);
663 int security_ptrace_access_check(struct task_struct
*child
, unsigned int mode
)
665 return call_int_hook(ptrace_access_check
, 0, child
, mode
);
668 int security_ptrace_traceme(struct task_struct
*parent
)
670 return call_int_hook(ptrace_traceme
, 0, parent
);
673 int security_capget(struct task_struct
*target
,
674 kernel_cap_t
*effective
,
675 kernel_cap_t
*inheritable
,
676 kernel_cap_t
*permitted
)
678 return call_int_hook(capget
, 0, target
,
679 effective
, inheritable
, permitted
);
682 int security_capset(struct cred
*new, const struct cred
*old
,
683 const kernel_cap_t
*effective
,
684 const kernel_cap_t
*inheritable
,
685 const kernel_cap_t
*permitted
)
687 return call_int_hook(capset
, 0, new, old
,
688 effective
, inheritable
, permitted
);
691 int security_capable(const struct cred
*cred
,
692 struct user_namespace
*ns
,
696 return call_int_hook(capable
, 0, cred
, ns
, cap
, opts
);
699 int security_quotactl(int cmds
, int type
, int id
, struct super_block
*sb
)
701 return call_int_hook(quotactl
, 0, cmds
, type
, id
, sb
);
704 int security_quota_on(struct dentry
*dentry
)
706 return call_int_hook(quota_on
, 0, dentry
);
709 int security_syslog(int type
)
711 return call_int_hook(syslog
, 0, type
);
714 int security_settime64(const struct timespec64
*ts
, const struct timezone
*tz
)
716 return call_int_hook(settime
, 0, ts
, tz
);
719 int security_vm_enough_memory_mm(struct mm_struct
*mm
, long pages
)
721 struct security_hook_list
*hp
;
722 int cap_sys_admin
= 1;
726 * The module will respond with a positive value if
727 * it thinks the __vm_enough_memory() call should be
728 * made with the cap_sys_admin set. If all of the modules
729 * agree that it should be set it will. If any module
730 * thinks it should not be set it won't.
732 hlist_for_each_entry(hp
, &security_hook_heads
.vm_enough_memory
, list
) {
733 rc
= hp
->hook
.vm_enough_memory(mm
, pages
);
739 return __vm_enough_memory(mm
, pages
, cap_sys_admin
);
742 int security_bprm_set_creds(struct linux_binprm
*bprm
)
744 return call_int_hook(bprm_set_creds
, 0, bprm
);
747 int security_bprm_check(struct linux_binprm
*bprm
)
751 ret
= call_int_hook(bprm_check_security
, 0, bprm
);
754 return ima_bprm_check(bprm
);
757 void security_bprm_committing_creds(struct linux_binprm
*bprm
)
759 call_void_hook(bprm_committing_creds
, bprm
);
762 void security_bprm_committed_creds(struct linux_binprm
*bprm
)
764 call_void_hook(bprm_committed_creds
, bprm
);
767 int security_sb_alloc(struct super_block
*sb
)
769 return call_int_hook(sb_alloc_security
, 0, sb
);
772 void security_sb_free(struct super_block
*sb
)
774 call_void_hook(sb_free_security
, sb
);
777 void security_free_mnt_opts(void **mnt_opts
)
781 call_void_hook(sb_free_mnt_opts
, *mnt_opts
);
784 EXPORT_SYMBOL(security_free_mnt_opts
);
786 int security_sb_eat_lsm_opts(char *options
, void **mnt_opts
)
788 return call_int_hook(sb_eat_lsm_opts
, 0, options
, mnt_opts
);
790 EXPORT_SYMBOL(security_sb_eat_lsm_opts
);
792 int security_sb_remount(struct super_block
*sb
,
795 return call_int_hook(sb_remount
, 0, sb
, mnt_opts
);
797 EXPORT_SYMBOL(security_sb_remount
);
799 int security_sb_kern_mount(struct super_block
*sb
)
801 return call_int_hook(sb_kern_mount
, 0, sb
);
804 int security_sb_show_options(struct seq_file
*m
, struct super_block
*sb
)
806 return call_int_hook(sb_show_options
, 0, m
, sb
);
809 int security_sb_statfs(struct dentry
*dentry
)
811 return call_int_hook(sb_statfs
, 0, dentry
);
814 int security_sb_mount(const char *dev_name
, const struct path
*path
,
815 const char *type
, unsigned long flags
, void *data
)
817 return call_int_hook(sb_mount
, 0, dev_name
, path
, type
, flags
, data
);
820 int security_sb_umount(struct vfsmount
*mnt
, int flags
)
822 return call_int_hook(sb_umount
, 0, mnt
, flags
);
825 int security_sb_pivotroot(const struct path
*old_path
, const struct path
*new_path
)
827 return call_int_hook(sb_pivotroot
, 0, old_path
, new_path
);
830 int security_sb_set_mnt_opts(struct super_block
*sb
,
832 unsigned long kern_flags
,
833 unsigned long *set_kern_flags
)
835 return call_int_hook(sb_set_mnt_opts
,
836 mnt_opts
? -EOPNOTSUPP
: 0, sb
,
837 mnt_opts
, kern_flags
, set_kern_flags
);
839 EXPORT_SYMBOL(security_sb_set_mnt_opts
);
841 int security_sb_clone_mnt_opts(const struct super_block
*oldsb
,
842 struct super_block
*newsb
,
843 unsigned long kern_flags
,
844 unsigned long *set_kern_flags
)
846 return call_int_hook(sb_clone_mnt_opts
, 0, oldsb
, newsb
,
847 kern_flags
, set_kern_flags
);
849 EXPORT_SYMBOL(security_sb_clone_mnt_opts
);
851 int security_add_mnt_opt(const char *option
, const char *val
, int len
,
854 return call_int_hook(sb_add_mnt_opt
, -EINVAL
,
855 option
, val
, len
, mnt_opts
);
857 EXPORT_SYMBOL(security_add_mnt_opt
);
859 int security_inode_alloc(struct inode
*inode
)
861 int rc
= lsm_inode_alloc(inode
);
865 rc
= call_int_hook(inode_alloc_security
, 0, inode
);
867 security_inode_free(inode
);
871 static void inode_free_by_rcu(struct rcu_head
*head
)
874 * The rcu head is at the start of the inode blob
876 kmem_cache_free(lsm_inode_cache
, head
);
879 void security_inode_free(struct inode
*inode
)
881 integrity_inode_free(inode
);
882 call_void_hook(inode_free_security
, inode
);
884 * The inode may still be referenced in a path walk and
885 * a call to security_inode_permission() can be made
886 * after inode_free_security() is called. Ideally, the VFS
887 * wouldn't do this, but fixing that is a much harder
888 * job. For now, simply free the i_security via RCU, and
889 * leave the current inode->i_security pointer intact.
890 * The inode will be freed after the RCU grace period too.
892 if (inode
->i_security
)
893 call_rcu((struct rcu_head
*)inode
->i_security
,
897 int security_dentry_init_security(struct dentry
*dentry
, int mode
,
898 const struct qstr
*name
, void **ctx
,
901 return call_int_hook(dentry_init_security
, -EOPNOTSUPP
, dentry
, mode
,
904 EXPORT_SYMBOL(security_dentry_init_security
);
906 int security_dentry_create_files_as(struct dentry
*dentry
, int mode
,
908 const struct cred
*old
, struct cred
*new)
910 return call_int_hook(dentry_create_files_as
, 0, dentry
, mode
,
913 EXPORT_SYMBOL(security_dentry_create_files_as
);
915 int security_inode_init_security(struct inode
*inode
, struct inode
*dir
,
916 const struct qstr
*qstr
,
917 const initxattrs initxattrs
, void *fs_data
)
919 struct xattr new_xattrs
[MAX_LSM_EVM_XATTR
+ 1];
920 struct xattr
*lsm_xattr
, *evm_xattr
, *xattr
;
923 if (unlikely(IS_PRIVATE(inode
)))
927 return call_int_hook(inode_init_security
, -EOPNOTSUPP
, inode
,
928 dir
, qstr
, NULL
, NULL
, NULL
);
929 memset(new_xattrs
, 0, sizeof(new_xattrs
));
930 lsm_xattr
= new_xattrs
;
931 ret
= call_int_hook(inode_init_security
, -EOPNOTSUPP
, inode
, dir
, qstr
,
934 &lsm_xattr
->value_len
);
938 evm_xattr
= lsm_xattr
+ 1;
939 ret
= evm_inode_init_security(inode
, lsm_xattr
, evm_xattr
);
942 ret
= initxattrs(inode
, new_xattrs
, fs_data
);
944 for (xattr
= new_xattrs
; xattr
->value
!= NULL
; xattr
++)
946 return (ret
== -EOPNOTSUPP
) ? 0 : ret
;
948 EXPORT_SYMBOL(security_inode_init_security
);
950 int security_old_inode_init_security(struct inode
*inode
, struct inode
*dir
,
951 const struct qstr
*qstr
, const char **name
,
952 void **value
, size_t *len
)
954 if (unlikely(IS_PRIVATE(inode
)))
956 return call_int_hook(inode_init_security
, -EOPNOTSUPP
, inode
, dir
,
957 qstr
, name
, value
, len
);
959 EXPORT_SYMBOL(security_old_inode_init_security
);
961 #ifdef CONFIG_SECURITY_PATH
962 int security_path_mknod(const struct path
*dir
, struct dentry
*dentry
, umode_t mode
,
965 if (unlikely(IS_PRIVATE(d_backing_inode(dir
->dentry
))))
967 return call_int_hook(path_mknod
, 0, dir
, dentry
, mode
, dev
);
969 EXPORT_SYMBOL(security_path_mknod
);
971 int security_path_mkdir(const struct path
*dir
, struct dentry
*dentry
, umode_t mode
)
973 if (unlikely(IS_PRIVATE(d_backing_inode(dir
->dentry
))))
975 return call_int_hook(path_mkdir
, 0, dir
, dentry
, mode
);
977 EXPORT_SYMBOL(security_path_mkdir
);
979 int security_path_rmdir(const struct path
*dir
, struct dentry
*dentry
)
981 if (unlikely(IS_PRIVATE(d_backing_inode(dir
->dentry
))))
983 return call_int_hook(path_rmdir
, 0, dir
, dentry
);
986 int security_path_unlink(const struct path
*dir
, struct dentry
*dentry
)
988 if (unlikely(IS_PRIVATE(d_backing_inode(dir
->dentry
))))
990 return call_int_hook(path_unlink
, 0, dir
, dentry
);
992 EXPORT_SYMBOL(security_path_unlink
);
994 int security_path_symlink(const struct path
*dir
, struct dentry
*dentry
,
995 const char *old_name
)
997 if (unlikely(IS_PRIVATE(d_backing_inode(dir
->dentry
))))
999 return call_int_hook(path_symlink
, 0, dir
, dentry
, old_name
);
1002 int security_path_link(struct dentry
*old_dentry
, const struct path
*new_dir
,
1003 struct dentry
*new_dentry
)
1005 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry
))))
1007 return call_int_hook(path_link
, 0, old_dentry
, new_dir
, new_dentry
);
1010 int security_path_rename(const struct path
*old_dir
, struct dentry
*old_dentry
,
1011 const struct path
*new_dir
, struct dentry
*new_dentry
,
1014 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry
)) ||
1015 (d_is_positive(new_dentry
) && IS_PRIVATE(d_backing_inode(new_dentry
)))))
1018 if (flags
& RENAME_EXCHANGE
) {
1019 int err
= call_int_hook(path_rename
, 0, new_dir
, new_dentry
,
1020 old_dir
, old_dentry
);
1025 return call_int_hook(path_rename
, 0, old_dir
, old_dentry
, new_dir
,
1028 EXPORT_SYMBOL(security_path_rename
);
1030 int security_path_truncate(const struct path
*path
)
1032 if (unlikely(IS_PRIVATE(d_backing_inode(path
->dentry
))))
1034 return call_int_hook(path_truncate
, 0, path
);
1037 int security_path_chmod(const struct path
*path
, umode_t mode
)
1039 if (unlikely(IS_PRIVATE(d_backing_inode(path
->dentry
))))
1041 return call_int_hook(path_chmod
, 0, path
, mode
);
1044 int security_path_chown(const struct path
*path
, kuid_t uid
, kgid_t gid
)
1046 if (unlikely(IS_PRIVATE(d_backing_inode(path
->dentry
))))
1048 return call_int_hook(path_chown
, 0, path
, uid
, gid
);
1051 int security_path_chroot(const struct path
*path
)
1053 return call_int_hook(path_chroot
, 0, path
);
1057 int security_inode_create(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
)
1059 if (unlikely(IS_PRIVATE(dir
)))
1061 return call_int_hook(inode_create
, 0, dir
, dentry
, mode
);
1063 EXPORT_SYMBOL_GPL(security_inode_create
);
1065 int security_inode_link(struct dentry
*old_dentry
, struct inode
*dir
,
1066 struct dentry
*new_dentry
)
1068 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry
))))
1070 return call_int_hook(inode_link
, 0, old_dentry
, dir
, new_dentry
);
1073 int security_inode_unlink(struct inode
*dir
, struct dentry
*dentry
)
1075 if (unlikely(IS_PRIVATE(d_backing_inode(dentry
))))
1077 return call_int_hook(inode_unlink
, 0, dir
, dentry
);
1080 int security_inode_symlink(struct inode
*dir
, struct dentry
*dentry
,
1081 const char *old_name
)
1083 if (unlikely(IS_PRIVATE(dir
)))
1085 return call_int_hook(inode_symlink
, 0, dir
, dentry
, old_name
);
1088 int security_inode_mkdir(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
)
1090 if (unlikely(IS_PRIVATE(dir
)))
1092 return call_int_hook(inode_mkdir
, 0, dir
, dentry
, mode
);
1094 EXPORT_SYMBOL_GPL(security_inode_mkdir
);
1096 int security_inode_rmdir(struct inode
*dir
, struct dentry
*dentry
)
1098 if (unlikely(IS_PRIVATE(d_backing_inode(dentry
))))
1100 return call_int_hook(inode_rmdir
, 0, dir
, dentry
);
1103 int security_inode_mknod(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
, dev_t dev
)
1105 if (unlikely(IS_PRIVATE(dir
)))
1107 return call_int_hook(inode_mknod
, 0, dir
, dentry
, mode
, dev
);
1110 int security_inode_rename(struct inode
*old_dir
, struct dentry
*old_dentry
,
1111 struct inode
*new_dir
, struct dentry
*new_dentry
,
1114 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry
)) ||
1115 (d_is_positive(new_dentry
) && IS_PRIVATE(d_backing_inode(new_dentry
)))))
1118 if (flags
& RENAME_EXCHANGE
) {
1119 int err
= call_int_hook(inode_rename
, 0, new_dir
, new_dentry
,
1120 old_dir
, old_dentry
);
1125 return call_int_hook(inode_rename
, 0, old_dir
, old_dentry
,
1126 new_dir
, new_dentry
);
1129 int security_inode_readlink(struct dentry
*dentry
)
1131 if (unlikely(IS_PRIVATE(d_backing_inode(dentry
))))
1133 return call_int_hook(inode_readlink
, 0, dentry
);
1136 int security_inode_follow_link(struct dentry
*dentry
, struct inode
*inode
,
1139 if (unlikely(IS_PRIVATE(inode
)))
1141 return call_int_hook(inode_follow_link
, 0, dentry
, inode
, rcu
);
1144 int security_inode_permission(struct inode
*inode
, int mask
)
1146 if (unlikely(IS_PRIVATE(inode
)))
1148 return call_int_hook(inode_permission
, 0, inode
, mask
);
1151 int security_inode_setattr(struct dentry
*dentry
, struct iattr
*attr
)
1155 if (unlikely(IS_PRIVATE(d_backing_inode(dentry
))))
1157 ret
= call_int_hook(inode_setattr
, 0, dentry
, attr
);
1160 return evm_inode_setattr(dentry
, attr
);
1162 EXPORT_SYMBOL_GPL(security_inode_setattr
);
1164 int security_inode_getattr(const struct path
*path
)
1166 if (unlikely(IS_PRIVATE(d_backing_inode(path
->dentry
))))
1168 return call_int_hook(inode_getattr
, 0, path
);
1171 int security_inode_setxattr(struct dentry
*dentry
, const char *name
,
1172 const void *value
, size_t size
, int flags
)
1176 if (unlikely(IS_PRIVATE(d_backing_inode(dentry
))))
1179 * SELinux and Smack integrate the cap call,
1180 * so assume that all LSMs supplying this call do so.
1182 ret
= call_int_hook(inode_setxattr
, 1, dentry
, name
, value
, size
,
1186 ret
= cap_inode_setxattr(dentry
, name
, value
, size
, flags
);
1189 ret
= ima_inode_setxattr(dentry
, name
, value
, size
);
1192 return evm_inode_setxattr(dentry
, name
, value
, size
);
1195 void security_inode_post_setxattr(struct dentry
*dentry
, const char *name
,
1196 const void *value
, size_t size
, int flags
)
1198 if (unlikely(IS_PRIVATE(d_backing_inode(dentry
))))
1200 call_void_hook(inode_post_setxattr
, dentry
, name
, value
, size
, flags
);
1201 evm_inode_post_setxattr(dentry
, name
, value
, size
);
1204 int security_inode_getxattr(struct dentry
*dentry
, const char *name
)
1206 if (unlikely(IS_PRIVATE(d_backing_inode(dentry
))))
1208 return call_int_hook(inode_getxattr
, 0, dentry
, name
);
1211 int security_inode_listxattr(struct dentry
*dentry
)
1213 if (unlikely(IS_PRIVATE(d_backing_inode(dentry
))))
1215 return call_int_hook(inode_listxattr
, 0, dentry
);
1218 int security_inode_removexattr(struct dentry
*dentry
, const char *name
)
1222 if (unlikely(IS_PRIVATE(d_backing_inode(dentry
))))
1225 * SELinux and Smack integrate the cap call,
1226 * so assume that all LSMs supplying this call do so.
1228 ret
= call_int_hook(inode_removexattr
, 1, dentry
, name
);
1230 ret
= cap_inode_removexattr(dentry
, name
);
1233 ret
= ima_inode_removexattr(dentry
, name
);
1236 return evm_inode_removexattr(dentry
, name
);
1239 int security_inode_need_killpriv(struct dentry
*dentry
)
1241 return call_int_hook(inode_need_killpriv
, 0, dentry
);
1244 int security_inode_killpriv(struct dentry
*dentry
)
1246 return call_int_hook(inode_killpriv
, 0, dentry
);
1249 int security_inode_getsecurity(struct inode
*inode
, const char *name
, void **buffer
, bool alloc
)
1251 struct security_hook_list
*hp
;
1254 if (unlikely(IS_PRIVATE(inode
)))
1257 * Only one module will provide an attribute with a given name.
1259 hlist_for_each_entry(hp
, &security_hook_heads
.inode_getsecurity
, list
) {
1260 rc
= hp
->hook
.inode_getsecurity(inode
, name
, buffer
, alloc
);
1261 if (rc
!= -EOPNOTSUPP
)
1267 int security_inode_setsecurity(struct inode
*inode
, const char *name
, const void *value
, size_t size
, int flags
)
1269 struct security_hook_list
*hp
;
1272 if (unlikely(IS_PRIVATE(inode
)))
1275 * Only one module will provide an attribute with a given name.
1277 hlist_for_each_entry(hp
, &security_hook_heads
.inode_setsecurity
, list
) {
1278 rc
= hp
->hook
.inode_setsecurity(inode
, name
, value
, size
,
1280 if (rc
!= -EOPNOTSUPP
)
1286 int security_inode_listsecurity(struct inode
*inode
, char *buffer
, size_t buffer_size
)
1288 if (unlikely(IS_PRIVATE(inode
)))
1290 return call_int_hook(inode_listsecurity
, 0, inode
, buffer
, buffer_size
);
1292 EXPORT_SYMBOL(security_inode_listsecurity
);
1294 void security_inode_getsecid(struct inode
*inode
, u32
*secid
)
1296 call_void_hook(inode_getsecid
, inode
, secid
);
1299 int security_inode_copy_up(struct dentry
*src
, struct cred
**new)
1301 return call_int_hook(inode_copy_up
, 0, src
, new);
1303 EXPORT_SYMBOL(security_inode_copy_up
);
1305 int security_inode_copy_up_xattr(const char *name
)
1307 return call_int_hook(inode_copy_up_xattr
, -EOPNOTSUPP
, name
);
1309 EXPORT_SYMBOL(security_inode_copy_up_xattr
);
1311 int security_file_permission(struct file
*file
, int mask
)
1315 ret
= call_int_hook(file_permission
, 0, file
, mask
);
1319 return fsnotify_perm(file
, mask
);
1322 int security_file_alloc(struct file
*file
)
1324 int rc
= lsm_file_alloc(file
);
1328 rc
= call_int_hook(file_alloc_security
, 0, file
);
1330 security_file_free(file
);
1334 void security_file_free(struct file
*file
)
1338 call_void_hook(file_free_security
, file
);
1340 blob
= file
->f_security
;
1342 file
->f_security
= NULL
;
1343 kmem_cache_free(lsm_file_cache
, blob
);
1347 int security_file_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
)
1349 return call_int_hook(file_ioctl
, 0, file
, cmd
, arg
);
1352 static inline unsigned long mmap_prot(struct file
*file
, unsigned long prot
)
1355 * Does we have PROT_READ and does the application expect
1356 * it to imply PROT_EXEC? If not, nothing to talk about...
1358 if ((prot
& (PROT_READ
| PROT_EXEC
)) != PROT_READ
)
1360 if (!(current
->personality
& READ_IMPLIES_EXEC
))
1363 * if that's an anonymous mapping, let it.
1366 return prot
| PROT_EXEC
;
1368 * ditto if it's not on noexec mount, except that on !MMU we need
1369 * NOMMU_MAP_EXEC (== VM_MAYEXEC) in this case
1371 if (!path_noexec(&file
->f_path
)) {
1373 if (file
->f_op
->mmap_capabilities
) {
1374 unsigned caps
= file
->f_op
->mmap_capabilities(file
);
1375 if (!(caps
& NOMMU_MAP_EXEC
))
1379 return prot
| PROT_EXEC
;
1381 /* anything on noexec mount won't get PROT_EXEC */
1385 int security_mmap_file(struct file
*file
, unsigned long prot
,
1386 unsigned long flags
)
1389 ret
= call_int_hook(mmap_file
, 0, file
, prot
,
1390 mmap_prot(file
, prot
), flags
);
1393 return ima_file_mmap(file
, prot
);
1396 int security_mmap_addr(unsigned long addr
)
1398 return call_int_hook(mmap_addr
, 0, addr
);
1401 int security_file_mprotect(struct vm_area_struct
*vma
, unsigned long reqprot
,
1404 return call_int_hook(file_mprotect
, 0, vma
, reqprot
, prot
);
1407 int security_file_lock(struct file
*file
, unsigned int cmd
)
1409 return call_int_hook(file_lock
, 0, file
, cmd
);
1412 int security_file_fcntl(struct file
*file
, unsigned int cmd
, unsigned long arg
)
1414 return call_int_hook(file_fcntl
, 0, file
, cmd
, arg
);
1417 void security_file_set_fowner(struct file
*file
)
1419 call_void_hook(file_set_fowner
, file
);
1422 int security_file_send_sigiotask(struct task_struct
*tsk
,
1423 struct fown_struct
*fown
, int sig
)
1425 return call_int_hook(file_send_sigiotask
, 0, tsk
, fown
, sig
);
1428 int security_file_receive(struct file
*file
)
1430 return call_int_hook(file_receive
, 0, file
);
1433 int security_file_open(struct file
*file
)
1437 ret
= call_int_hook(file_open
, 0, file
);
1441 return fsnotify_perm(file
, MAY_OPEN
);
1444 int security_task_alloc(struct task_struct
*task
, unsigned long clone_flags
)
1446 int rc
= lsm_task_alloc(task
);
1450 rc
= call_int_hook(task_alloc
, 0, task
, clone_flags
);
1452 security_task_free(task
);
1456 void security_task_free(struct task_struct
*task
)
1458 call_void_hook(task_free
, task
);
1460 kfree(task
->security
);
1461 task
->security
= NULL
;
1464 int security_cred_alloc_blank(struct cred
*cred
, gfp_t gfp
)
1466 int rc
= lsm_cred_alloc(cred
, gfp
);
1471 rc
= call_int_hook(cred_alloc_blank
, 0, cred
, gfp
);
1473 security_cred_free(cred
);
1477 void security_cred_free(struct cred
*cred
)
1480 * There is a failure case in prepare_creds() that
1481 * may result in a call here with ->security being NULL.
1483 if (unlikely(cred
->security
== NULL
))
1486 call_void_hook(cred_free
, cred
);
1488 kfree(cred
->security
);
1489 cred
->security
= NULL
;
1492 int security_prepare_creds(struct cred
*new, const struct cred
*old
, gfp_t gfp
)
1494 int rc
= lsm_cred_alloc(new, gfp
);
1499 rc
= call_int_hook(cred_prepare
, 0, new, old
, gfp
);
1501 security_cred_free(new);
1505 void security_transfer_creds(struct cred
*new, const struct cred
*old
)
1507 call_void_hook(cred_transfer
, new, old
);
1510 void security_cred_getsecid(const struct cred
*c
, u32
*secid
)
1513 call_void_hook(cred_getsecid
, c
, secid
);
1515 EXPORT_SYMBOL(security_cred_getsecid
);
1517 int security_kernel_act_as(struct cred
*new, u32 secid
)
1519 return call_int_hook(kernel_act_as
, 0, new, secid
);
1522 int security_kernel_create_files_as(struct cred
*new, struct inode
*inode
)
1524 return call_int_hook(kernel_create_files_as
, 0, new, inode
);
1527 int security_kernel_module_request(char *kmod_name
)
1531 ret
= call_int_hook(kernel_module_request
, 0, kmod_name
);
1534 return integrity_kernel_module_request(kmod_name
);
1537 int security_kernel_read_file(struct file
*file
, enum kernel_read_file_id id
)
1541 ret
= call_int_hook(kernel_read_file
, 0, file
, id
);
1544 return ima_read_file(file
, id
);
1546 EXPORT_SYMBOL_GPL(security_kernel_read_file
);
1548 int security_kernel_post_read_file(struct file
*file
, char *buf
, loff_t size
,
1549 enum kernel_read_file_id id
)
1553 ret
= call_int_hook(kernel_post_read_file
, 0, file
, buf
, size
, id
);
1556 return ima_post_read_file(file
, buf
, size
, id
);
1558 EXPORT_SYMBOL_GPL(security_kernel_post_read_file
);
1560 int security_kernel_load_data(enum kernel_load_data_id id
)
1564 ret
= call_int_hook(kernel_load_data
, 0, id
);
1567 return ima_load_data(id
);
1569 EXPORT_SYMBOL_GPL(security_kernel_load_data
);
1571 int security_task_fix_setuid(struct cred
*new, const struct cred
*old
,
1574 return call_int_hook(task_fix_setuid
, 0, new, old
, flags
);
1577 int security_task_setpgid(struct task_struct
*p
, pid_t pgid
)
1579 return call_int_hook(task_setpgid
, 0, p
, pgid
);
1582 int security_task_getpgid(struct task_struct
*p
)
1584 return call_int_hook(task_getpgid
, 0, p
);
1587 int security_task_getsid(struct task_struct
*p
)
1589 return call_int_hook(task_getsid
, 0, p
);
1592 void security_task_getsecid(struct task_struct
*p
, u32
*secid
)
1595 call_void_hook(task_getsecid
, p
, secid
);
1597 EXPORT_SYMBOL(security_task_getsecid
);
1599 int security_task_setnice(struct task_struct
*p
, int nice
)
1601 return call_int_hook(task_setnice
, 0, p
, nice
);
1604 int security_task_setioprio(struct task_struct
*p
, int ioprio
)
1606 return call_int_hook(task_setioprio
, 0, p
, ioprio
);
1609 int security_task_getioprio(struct task_struct
*p
)
1611 return call_int_hook(task_getioprio
, 0, p
);
1614 int security_task_prlimit(const struct cred
*cred
, const struct cred
*tcred
,
1617 return call_int_hook(task_prlimit
, 0, cred
, tcred
, flags
);
1620 int security_task_setrlimit(struct task_struct
*p
, unsigned int resource
,
1621 struct rlimit
*new_rlim
)
1623 return call_int_hook(task_setrlimit
, 0, p
, resource
, new_rlim
);
1626 int security_task_setscheduler(struct task_struct
*p
)
1628 return call_int_hook(task_setscheduler
, 0, p
);
1631 int security_task_getscheduler(struct task_struct
*p
)
1633 return call_int_hook(task_getscheduler
, 0, p
);
1636 int security_task_movememory(struct task_struct
*p
)
1638 return call_int_hook(task_movememory
, 0, p
);
1641 int security_task_kill(struct task_struct
*p
, struct kernel_siginfo
*info
,
1642 int sig
, const struct cred
*cred
)
1644 return call_int_hook(task_kill
, 0, p
, info
, sig
, cred
);
1647 int security_task_prctl(int option
, unsigned long arg2
, unsigned long arg3
,
1648 unsigned long arg4
, unsigned long arg5
)
1652 struct security_hook_list
*hp
;
1654 hlist_for_each_entry(hp
, &security_hook_heads
.task_prctl
, list
) {
1655 thisrc
= hp
->hook
.task_prctl(option
, arg2
, arg3
, arg4
, arg5
);
1656 if (thisrc
!= -ENOSYS
) {
1665 void security_task_to_inode(struct task_struct
*p
, struct inode
*inode
)
1667 call_void_hook(task_to_inode
, p
, inode
);
1670 int security_ipc_permission(struct kern_ipc_perm
*ipcp
, short flag
)
1672 return call_int_hook(ipc_permission
, 0, ipcp
, flag
);
1675 void security_ipc_getsecid(struct kern_ipc_perm
*ipcp
, u32
*secid
)
1678 call_void_hook(ipc_getsecid
, ipcp
, secid
);
1681 int security_msg_msg_alloc(struct msg_msg
*msg
)
1683 int rc
= lsm_msg_msg_alloc(msg
);
1687 rc
= call_int_hook(msg_msg_alloc_security
, 0, msg
);
1689 security_msg_msg_free(msg
);
1693 void security_msg_msg_free(struct msg_msg
*msg
)
1695 call_void_hook(msg_msg_free_security
, msg
);
1696 kfree(msg
->security
);
1697 msg
->security
= NULL
;
1700 int security_msg_queue_alloc(struct kern_ipc_perm
*msq
)
1702 int rc
= lsm_ipc_alloc(msq
);
1706 rc
= call_int_hook(msg_queue_alloc_security
, 0, msq
);
1708 security_msg_queue_free(msq
);
1712 void security_msg_queue_free(struct kern_ipc_perm
*msq
)
1714 call_void_hook(msg_queue_free_security
, msq
);
1715 kfree(msq
->security
);
1716 msq
->security
= NULL
;
1719 int security_msg_queue_associate(struct kern_ipc_perm
*msq
, int msqflg
)
1721 return call_int_hook(msg_queue_associate
, 0, msq
, msqflg
);
1724 int security_msg_queue_msgctl(struct kern_ipc_perm
*msq
, int cmd
)
1726 return call_int_hook(msg_queue_msgctl
, 0, msq
, cmd
);
1729 int security_msg_queue_msgsnd(struct kern_ipc_perm
*msq
,
1730 struct msg_msg
*msg
, int msqflg
)
1732 return call_int_hook(msg_queue_msgsnd
, 0, msq
, msg
, msqflg
);
1735 int security_msg_queue_msgrcv(struct kern_ipc_perm
*msq
, struct msg_msg
*msg
,
1736 struct task_struct
*target
, long type
, int mode
)
1738 return call_int_hook(msg_queue_msgrcv
, 0, msq
, msg
, target
, type
, mode
);
1741 int security_shm_alloc(struct kern_ipc_perm
*shp
)
1743 int rc
= lsm_ipc_alloc(shp
);
1747 rc
= call_int_hook(shm_alloc_security
, 0, shp
);
1749 security_shm_free(shp
);
1753 void security_shm_free(struct kern_ipc_perm
*shp
)
1755 call_void_hook(shm_free_security
, shp
);
1756 kfree(shp
->security
);
1757 shp
->security
= NULL
;
1760 int security_shm_associate(struct kern_ipc_perm
*shp
, int shmflg
)
1762 return call_int_hook(shm_associate
, 0, shp
, shmflg
);
1765 int security_shm_shmctl(struct kern_ipc_perm
*shp
, int cmd
)
1767 return call_int_hook(shm_shmctl
, 0, shp
, cmd
);
1770 int security_shm_shmat(struct kern_ipc_perm
*shp
, char __user
*shmaddr
, int shmflg
)
1772 return call_int_hook(shm_shmat
, 0, shp
, shmaddr
, shmflg
);
1775 int security_sem_alloc(struct kern_ipc_perm
*sma
)
1777 int rc
= lsm_ipc_alloc(sma
);
1781 rc
= call_int_hook(sem_alloc_security
, 0, sma
);
1783 security_sem_free(sma
);
1787 void security_sem_free(struct kern_ipc_perm
*sma
)
1789 call_void_hook(sem_free_security
, sma
);
1790 kfree(sma
->security
);
1791 sma
->security
= NULL
;
1794 int security_sem_associate(struct kern_ipc_perm
*sma
, int semflg
)
1796 return call_int_hook(sem_associate
, 0, sma
, semflg
);
1799 int security_sem_semctl(struct kern_ipc_perm
*sma
, int cmd
)
1801 return call_int_hook(sem_semctl
, 0, sma
, cmd
);
1804 int security_sem_semop(struct kern_ipc_perm
*sma
, struct sembuf
*sops
,
1805 unsigned nsops
, int alter
)
1807 return call_int_hook(sem_semop
, 0, sma
, sops
, nsops
, alter
);
1810 void security_d_instantiate(struct dentry
*dentry
, struct inode
*inode
)
1812 if (unlikely(inode
&& IS_PRIVATE(inode
)))
1814 call_void_hook(d_instantiate
, dentry
, inode
);
1816 EXPORT_SYMBOL(security_d_instantiate
);
1818 int security_getprocattr(struct task_struct
*p
, const char *lsm
, char *name
,
1821 struct security_hook_list
*hp
;
1823 hlist_for_each_entry(hp
, &security_hook_heads
.getprocattr
, list
) {
1824 if (lsm
!= NULL
&& strcmp(lsm
, hp
->lsm
))
1826 return hp
->hook
.getprocattr(p
, name
, value
);
1831 int security_setprocattr(const char *lsm
, const char *name
, void *value
,
1834 struct security_hook_list
*hp
;
1836 hlist_for_each_entry(hp
, &security_hook_heads
.setprocattr
, list
) {
1837 if (lsm
!= NULL
&& strcmp(lsm
, hp
->lsm
))
1839 return hp
->hook
.setprocattr(name
, value
, size
);
1844 int security_netlink_send(struct sock
*sk
, struct sk_buff
*skb
)
1846 return call_int_hook(netlink_send
, 0, sk
, skb
);
1849 int security_ismaclabel(const char *name
)
1851 return call_int_hook(ismaclabel
, 0, name
);
1853 EXPORT_SYMBOL(security_ismaclabel
);
1855 int security_secid_to_secctx(u32 secid
, char **secdata
, u32
*seclen
)
1857 return call_int_hook(secid_to_secctx
, -EOPNOTSUPP
, secid
, secdata
,
1860 EXPORT_SYMBOL(security_secid_to_secctx
);
1862 int security_secctx_to_secid(const char *secdata
, u32 seclen
, u32
*secid
)
1865 return call_int_hook(secctx_to_secid
, 0, secdata
, seclen
, secid
);
1867 EXPORT_SYMBOL(security_secctx_to_secid
);
1869 void security_release_secctx(char *secdata
, u32 seclen
)
1871 call_void_hook(release_secctx
, secdata
, seclen
);
1873 EXPORT_SYMBOL(security_release_secctx
);
1875 void security_inode_invalidate_secctx(struct inode
*inode
)
1877 call_void_hook(inode_invalidate_secctx
, inode
);
1879 EXPORT_SYMBOL(security_inode_invalidate_secctx
);
1881 int security_inode_notifysecctx(struct inode
*inode
, void *ctx
, u32 ctxlen
)
1883 return call_int_hook(inode_notifysecctx
, 0, inode
, ctx
, ctxlen
);
1885 EXPORT_SYMBOL(security_inode_notifysecctx
);
1887 int security_inode_setsecctx(struct dentry
*dentry
, void *ctx
, u32 ctxlen
)
1889 return call_int_hook(inode_setsecctx
, 0, dentry
, ctx
, ctxlen
);
1891 EXPORT_SYMBOL(security_inode_setsecctx
);
1893 int security_inode_getsecctx(struct inode
*inode
, void **ctx
, u32
*ctxlen
)
1895 return call_int_hook(inode_getsecctx
, -EOPNOTSUPP
, inode
, ctx
, ctxlen
);
1897 EXPORT_SYMBOL(security_inode_getsecctx
);
1899 #ifdef CONFIG_SECURITY_NETWORK
1901 int security_unix_stream_connect(struct sock
*sock
, struct sock
*other
, struct sock
*newsk
)
1903 return call_int_hook(unix_stream_connect
, 0, sock
, other
, newsk
);
1905 EXPORT_SYMBOL(security_unix_stream_connect
);
1907 int security_unix_may_send(struct socket
*sock
, struct socket
*other
)
1909 return call_int_hook(unix_may_send
, 0, sock
, other
);
1911 EXPORT_SYMBOL(security_unix_may_send
);
1913 int security_socket_create(int family
, int type
, int protocol
, int kern
)
1915 return call_int_hook(socket_create
, 0, family
, type
, protocol
, kern
);
1918 int security_socket_post_create(struct socket
*sock
, int family
,
1919 int type
, int protocol
, int kern
)
1921 return call_int_hook(socket_post_create
, 0, sock
, family
, type
,
1925 int security_socket_socketpair(struct socket
*socka
, struct socket
*sockb
)
1927 return call_int_hook(socket_socketpair
, 0, socka
, sockb
);
1929 EXPORT_SYMBOL(security_socket_socketpair
);
1931 int security_socket_bind(struct socket
*sock
, struct sockaddr
*address
, int addrlen
)
1933 return call_int_hook(socket_bind
, 0, sock
, address
, addrlen
);
1936 int security_socket_connect(struct socket
*sock
, struct sockaddr
*address
, int addrlen
)
1938 return call_int_hook(socket_connect
, 0, sock
, address
, addrlen
);
1941 int security_socket_listen(struct socket
*sock
, int backlog
)
1943 return call_int_hook(socket_listen
, 0, sock
, backlog
);
1946 int security_socket_accept(struct socket
*sock
, struct socket
*newsock
)
1948 return call_int_hook(socket_accept
, 0, sock
, newsock
);
1951 int security_socket_sendmsg(struct socket
*sock
, struct msghdr
*msg
, int size
)
1953 return call_int_hook(socket_sendmsg
, 0, sock
, msg
, size
);
1956 int security_socket_recvmsg(struct socket
*sock
, struct msghdr
*msg
,
1957 int size
, int flags
)
1959 return call_int_hook(socket_recvmsg
, 0, sock
, msg
, size
, flags
);
1962 int security_socket_getsockname(struct socket
*sock
)
1964 return call_int_hook(socket_getsockname
, 0, sock
);
1967 int security_socket_getpeername(struct socket
*sock
)
1969 return call_int_hook(socket_getpeername
, 0, sock
);
1972 int security_socket_getsockopt(struct socket
*sock
, int level
, int optname
)
1974 return call_int_hook(socket_getsockopt
, 0, sock
, level
, optname
);
1977 int security_socket_setsockopt(struct socket
*sock
, int level
, int optname
)
1979 return call_int_hook(socket_setsockopt
, 0, sock
, level
, optname
);
1982 int security_socket_shutdown(struct socket
*sock
, int how
)
1984 return call_int_hook(socket_shutdown
, 0, sock
, how
);
1987 int security_sock_rcv_skb(struct sock
*sk
, struct sk_buff
*skb
)
1989 return call_int_hook(socket_sock_rcv_skb
, 0, sk
, skb
);
1991 EXPORT_SYMBOL(security_sock_rcv_skb
);
1993 int security_socket_getpeersec_stream(struct socket
*sock
, char __user
*optval
,
1994 int __user
*optlen
, unsigned len
)
1996 return call_int_hook(socket_getpeersec_stream
, -ENOPROTOOPT
, sock
,
1997 optval
, optlen
, len
);
2000 int security_socket_getpeersec_dgram(struct socket
*sock
, struct sk_buff
*skb
, u32
*secid
)
2002 return call_int_hook(socket_getpeersec_dgram
, -ENOPROTOOPT
, sock
,
2005 EXPORT_SYMBOL(security_socket_getpeersec_dgram
);
2007 int security_sk_alloc(struct sock
*sk
, int family
, gfp_t priority
)
2009 return call_int_hook(sk_alloc_security
, 0, sk
, family
, priority
);
2012 void security_sk_free(struct sock
*sk
)
2014 call_void_hook(sk_free_security
, sk
);
2017 void security_sk_clone(const struct sock
*sk
, struct sock
*newsk
)
2019 call_void_hook(sk_clone_security
, sk
, newsk
);
2021 EXPORT_SYMBOL(security_sk_clone
);
2023 void security_sk_classify_flow(struct sock
*sk
, struct flowi
*fl
)
2025 call_void_hook(sk_getsecid
, sk
, &fl
->flowi_secid
);
2027 EXPORT_SYMBOL(security_sk_classify_flow
);
2029 void security_req_classify_flow(const struct request_sock
*req
, struct flowi
*fl
)
2031 call_void_hook(req_classify_flow
, req
, fl
);
2033 EXPORT_SYMBOL(security_req_classify_flow
);
2035 void security_sock_graft(struct sock
*sk
, struct socket
*parent
)
2037 call_void_hook(sock_graft
, sk
, parent
);
2039 EXPORT_SYMBOL(security_sock_graft
);
2041 int security_inet_conn_request(struct sock
*sk
,
2042 struct sk_buff
*skb
, struct request_sock
*req
)
2044 return call_int_hook(inet_conn_request
, 0, sk
, skb
, req
);
2046 EXPORT_SYMBOL(security_inet_conn_request
);
2048 void security_inet_csk_clone(struct sock
*newsk
,
2049 const struct request_sock
*req
)
2051 call_void_hook(inet_csk_clone
, newsk
, req
);
2054 void security_inet_conn_established(struct sock
*sk
,
2055 struct sk_buff
*skb
)
2057 call_void_hook(inet_conn_established
, sk
, skb
);
2059 EXPORT_SYMBOL(security_inet_conn_established
);
2061 int security_secmark_relabel_packet(u32 secid
)
2063 return call_int_hook(secmark_relabel_packet
, 0, secid
);
2065 EXPORT_SYMBOL(security_secmark_relabel_packet
);
2067 void security_secmark_refcount_inc(void)
2069 call_void_hook(secmark_refcount_inc
);
2071 EXPORT_SYMBOL(security_secmark_refcount_inc
);
2073 void security_secmark_refcount_dec(void)
2075 call_void_hook(secmark_refcount_dec
);
2077 EXPORT_SYMBOL(security_secmark_refcount_dec
);
2079 int security_tun_dev_alloc_security(void **security
)
2081 return call_int_hook(tun_dev_alloc_security
, 0, security
);
2083 EXPORT_SYMBOL(security_tun_dev_alloc_security
);
2085 void security_tun_dev_free_security(void *security
)
2087 call_void_hook(tun_dev_free_security
, security
);
2089 EXPORT_SYMBOL(security_tun_dev_free_security
);
2091 int security_tun_dev_create(void)
2093 return call_int_hook(tun_dev_create
, 0);
2095 EXPORT_SYMBOL(security_tun_dev_create
);
2097 int security_tun_dev_attach_queue(void *security
)
2099 return call_int_hook(tun_dev_attach_queue
, 0, security
);
2101 EXPORT_SYMBOL(security_tun_dev_attach_queue
);
2103 int security_tun_dev_attach(struct sock
*sk
, void *security
)
2105 return call_int_hook(tun_dev_attach
, 0, sk
, security
);
2107 EXPORT_SYMBOL(security_tun_dev_attach
);
2109 int security_tun_dev_open(void *security
)
2111 return call_int_hook(tun_dev_open
, 0, security
);
2113 EXPORT_SYMBOL(security_tun_dev_open
);
2115 int security_sctp_assoc_request(struct sctp_endpoint
*ep
, struct sk_buff
*skb
)
2117 return call_int_hook(sctp_assoc_request
, 0, ep
, skb
);
2119 EXPORT_SYMBOL(security_sctp_assoc_request
);
2121 int security_sctp_bind_connect(struct sock
*sk
, int optname
,
2122 struct sockaddr
*address
, int addrlen
)
2124 return call_int_hook(sctp_bind_connect
, 0, sk
, optname
,
2127 EXPORT_SYMBOL(security_sctp_bind_connect
);
2129 void security_sctp_sk_clone(struct sctp_endpoint
*ep
, struct sock
*sk
,
2132 call_void_hook(sctp_sk_clone
, ep
, sk
, newsk
);
2134 EXPORT_SYMBOL(security_sctp_sk_clone
);
2136 #endif /* CONFIG_SECURITY_NETWORK */
2138 #ifdef CONFIG_SECURITY_INFINIBAND
2140 int security_ib_pkey_access(void *sec
, u64 subnet_prefix
, u16 pkey
)
2142 return call_int_hook(ib_pkey_access
, 0, sec
, subnet_prefix
, pkey
);
2144 EXPORT_SYMBOL(security_ib_pkey_access
);
2146 int security_ib_endport_manage_subnet(void *sec
, const char *dev_name
, u8 port_num
)
2148 return call_int_hook(ib_endport_manage_subnet
, 0, sec
, dev_name
, port_num
);
2150 EXPORT_SYMBOL(security_ib_endport_manage_subnet
);
2152 int security_ib_alloc_security(void **sec
)
2154 return call_int_hook(ib_alloc_security
, 0, sec
);
2156 EXPORT_SYMBOL(security_ib_alloc_security
);
2158 void security_ib_free_security(void *sec
)
2160 call_void_hook(ib_free_security
, sec
);
2162 EXPORT_SYMBOL(security_ib_free_security
);
2163 #endif /* CONFIG_SECURITY_INFINIBAND */
2165 #ifdef CONFIG_SECURITY_NETWORK_XFRM
2167 int security_xfrm_policy_alloc(struct xfrm_sec_ctx
**ctxp
,
2168 struct xfrm_user_sec_ctx
*sec_ctx
,
2171 return call_int_hook(xfrm_policy_alloc_security
, 0, ctxp
, sec_ctx
, gfp
);
2173 EXPORT_SYMBOL(security_xfrm_policy_alloc
);
2175 int security_xfrm_policy_clone(struct xfrm_sec_ctx
*old_ctx
,
2176 struct xfrm_sec_ctx
**new_ctxp
)
2178 return call_int_hook(xfrm_policy_clone_security
, 0, old_ctx
, new_ctxp
);
2181 void security_xfrm_policy_free(struct xfrm_sec_ctx
*ctx
)
2183 call_void_hook(xfrm_policy_free_security
, ctx
);
2185 EXPORT_SYMBOL(security_xfrm_policy_free
);
2187 int security_xfrm_policy_delete(struct xfrm_sec_ctx
*ctx
)
2189 return call_int_hook(xfrm_policy_delete_security
, 0, ctx
);
2192 int security_xfrm_state_alloc(struct xfrm_state
*x
,
2193 struct xfrm_user_sec_ctx
*sec_ctx
)
2195 return call_int_hook(xfrm_state_alloc
, 0, x
, sec_ctx
);
2197 EXPORT_SYMBOL(security_xfrm_state_alloc
);
2199 int security_xfrm_state_alloc_acquire(struct xfrm_state
*x
,
2200 struct xfrm_sec_ctx
*polsec
, u32 secid
)
2202 return call_int_hook(xfrm_state_alloc_acquire
, 0, x
, polsec
, secid
);
2205 int security_xfrm_state_delete(struct xfrm_state
*x
)
2207 return call_int_hook(xfrm_state_delete_security
, 0, x
);
2209 EXPORT_SYMBOL(security_xfrm_state_delete
);
2211 void security_xfrm_state_free(struct xfrm_state
*x
)
2213 call_void_hook(xfrm_state_free_security
, x
);
2216 int security_xfrm_policy_lookup(struct xfrm_sec_ctx
*ctx
, u32 fl_secid
, u8 dir
)
2218 return call_int_hook(xfrm_policy_lookup
, 0, ctx
, fl_secid
, dir
);
2221 int security_xfrm_state_pol_flow_match(struct xfrm_state
*x
,
2222 struct xfrm_policy
*xp
,
2223 const struct flowi
*fl
)
2225 struct security_hook_list
*hp
;
2229 * Since this function is expected to return 0 or 1, the judgment
2230 * becomes difficult if multiple LSMs supply this call. Fortunately,
2231 * we can use the first LSM's judgment because currently only SELinux
2232 * supplies this call.
2234 * For speed optimization, we explicitly break the loop rather than
2237 hlist_for_each_entry(hp
, &security_hook_heads
.xfrm_state_pol_flow_match
,
2239 rc
= hp
->hook
.xfrm_state_pol_flow_match(x
, xp
, fl
);
2245 int security_xfrm_decode_session(struct sk_buff
*skb
, u32
*secid
)
2247 return call_int_hook(xfrm_decode_session
, 0, skb
, secid
, 1);
2250 void security_skb_classify_flow(struct sk_buff
*skb
, struct flowi
*fl
)
2252 int rc
= call_int_hook(xfrm_decode_session
, 0, skb
, &fl
->flowi_secid
,
2257 EXPORT_SYMBOL(security_skb_classify_flow
);
2259 #endif /* CONFIG_SECURITY_NETWORK_XFRM */
2263 int security_key_alloc(struct key
*key
, const struct cred
*cred
,
2264 unsigned long flags
)
2266 return call_int_hook(key_alloc
, 0, key
, cred
, flags
);
2269 void security_key_free(struct key
*key
)
2271 call_void_hook(key_free
, key
);
2274 int security_key_permission(key_ref_t key_ref
,
2275 const struct cred
*cred
, unsigned perm
)
2277 return call_int_hook(key_permission
, 0, key_ref
, cred
, perm
);
2280 int security_key_getsecurity(struct key
*key
, char **_buffer
)
2283 return call_int_hook(key_getsecurity
, 0, key
, _buffer
);
2286 #endif /* CONFIG_KEYS */
2290 int security_audit_rule_init(u32 field
, u32 op
, char *rulestr
, void **lsmrule
)
2292 return call_int_hook(audit_rule_init
, 0, field
, op
, rulestr
, lsmrule
);
2295 int security_audit_rule_known(struct audit_krule
*krule
)
2297 return call_int_hook(audit_rule_known
, 0, krule
);
2300 void security_audit_rule_free(void *lsmrule
)
2302 call_void_hook(audit_rule_free
, lsmrule
);
2305 int security_audit_rule_match(u32 secid
, u32 field
, u32 op
, void *lsmrule
)
2307 return call_int_hook(audit_rule_match
, 0, secid
, field
, op
, lsmrule
);
2309 #endif /* CONFIG_AUDIT */
2311 #ifdef CONFIG_BPF_SYSCALL
2312 int security_bpf(int cmd
, union bpf_attr
*attr
, unsigned int size
)
2314 return call_int_hook(bpf
, 0, cmd
, attr
, size
);
2316 int security_bpf_map(struct bpf_map
*map
, fmode_t fmode
)
2318 return call_int_hook(bpf_map
, 0, map
, fmode
);
2320 int security_bpf_prog(struct bpf_prog
*prog
)
2322 return call_int_hook(bpf_prog
, 0, prog
);
2324 int security_bpf_map_alloc(struct bpf_map
*map
)
2326 return call_int_hook(bpf_map_alloc_security
, 0, map
);
2328 int security_bpf_prog_alloc(struct bpf_prog_aux
*aux
)
2330 return call_int_hook(bpf_prog_alloc_security
, 0, aux
);
2332 void security_bpf_map_free(struct bpf_map
*map
)
2334 call_void_hook(bpf_map_free_security
, map
);
2336 void security_bpf_prog_free(struct bpf_prog_aux
*aux
)
2338 call_void_hook(bpf_prog_free_security
, aux
);
2340 #endif /* CONFIG_BPF_SYSCALL */