1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Security plug functions
5 * Copyright (C) 2001 WireX Communications, Inc <chris@wirex.com>
6 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
7 * Copyright (C) 2001 Networks Associates Technology, Inc <ssmalley@nai.com>
8 * Copyright (C) 2016 Mellanox Technologies
11 #define pr_fmt(fmt) "LSM: " fmt
13 #include <linux/bpf.h>
14 #include <linux/capability.h>
15 #include <linux/dcache.h>
16 #include <linux/export.h>
17 #include <linux/init.h>
18 #include <linux/kernel.h>
19 #include <linux/lsm_hooks.h>
20 #include <linux/integrity.h>
21 #include <linux/ima.h>
22 #include <linux/evm.h>
23 #include <linux/fsnotify.h>
24 #include <linux/mman.h>
25 #include <linux/mount.h>
26 #include <linux/personality.h>
27 #include <linux/backing-dev.h>
28 #include <linux/string.h>
29 #include <linux/msg.h>
32 #define MAX_LSM_EVM_XATTR 2
34 /* How many LSMs were built into the kernel? */
35 #define LSM_COUNT (__end_lsm_info - __start_lsm_info)
37 struct security_hook_heads security_hook_heads __lsm_ro_after_init
;
38 static ATOMIC_NOTIFIER_HEAD(lsm_notifier_chain
);
40 static struct kmem_cache
*lsm_file_cache
;
41 static struct kmem_cache
*lsm_inode_cache
;
44 static struct lsm_blob_sizes blob_sizes __lsm_ro_after_init
;
46 /* Boot-time LSM user choice */
47 static __initdata
const char *chosen_lsm_order
;
48 static __initdata
const char *chosen_major_lsm
;
50 static __initconst
const char * const builtin_lsm_order
= CONFIG_LSM
;
52 /* Ordered list of LSMs to initialize. */
53 static __initdata
struct lsm_info
**ordered_lsms
;
54 static __initdata
struct lsm_info
*exclusive
;
56 static __initdata
bool debug
;
57 #define init_debug(...) \
60 pr_info(__VA_ARGS__); \
63 static bool __init
is_enabled(struct lsm_info
*lsm
)
71 /* Mark an LSM's enabled flag. */
72 static int lsm_enabled_true __initdata
= 1;
73 static int lsm_enabled_false __initdata
= 0;
74 static void __init
set_enabled(struct lsm_info
*lsm
, bool enabled
)
77 * When an LSM hasn't configured an enable variable, we can use
78 * a hard-coded location for storing the default enabled state.
82 lsm
->enabled
= &lsm_enabled_true
;
84 lsm
->enabled
= &lsm_enabled_false
;
85 } else if (lsm
->enabled
== &lsm_enabled_true
) {
87 lsm
->enabled
= &lsm_enabled_false
;
88 } else if (lsm
->enabled
== &lsm_enabled_false
) {
90 lsm
->enabled
= &lsm_enabled_true
;
92 *lsm
->enabled
= enabled
;
96 /* Is an LSM already listed in the ordered LSMs list? */
97 static bool __init
exists_ordered_lsm(struct lsm_info
*lsm
)
99 struct lsm_info
**check
;
101 for (check
= ordered_lsms
; *check
; check
++)
108 /* Append an LSM to the list of ordered LSMs to initialize. */
109 static int last_lsm __initdata
;
110 static void __init
append_ordered_lsm(struct lsm_info
*lsm
, const char *from
)
112 /* Ignore duplicate selections. */
113 if (exists_ordered_lsm(lsm
))
116 if (WARN(last_lsm
== LSM_COUNT
, "%s: out of LSM slots!?\n", from
))
119 /* Enable this LSM, if it is not already set. */
121 lsm
->enabled
= &lsm_enabled_true
;
122 ordered_lsms
[last_lsm
++] = lsm
;
124 init_debug("%s ordering: %s (%sabled)\n", from
, lsm
->name
,
125 is_enabled(lsm
) ? "en" : "dis");
128 /* Is an LSM allowed to be initialized? */
129 static bool __init
lsm_allowed(struct lsm_info
*lsm
)
131 /* Skip if the LSM is disabled. */
132 if (!is_enabled(lsm
))
135 /* Not allowed if another exclusive LSM already initialized. */
136 if ((lsm
->flags
& LSM_FLAG_EXCLUSIVE
) && exclusive
) {
137 init_debug("exclusive disabled: %s\n", lsm
->name
);
144 static void __init
lsm_set_blob_size(int *need
, int *lbs
)
155 static void __init
lsm_set_blob_sizes(struct lsm_blob_sizes
*needed
)
160 lsm_set_blob_size(&needed
->lbs_cred
, &blob_sizes
.lbs_cred
);
161 lsm_set_blob_size(&needed
->lbs_file
, &blob_sizes
.lbs_file
);
163 * The inode blob gets an rcu_head in addition to
164 * what the modules might need.
166 if (needed
->lbs_inode
&& blob_sizes
.lbs_inode
== 0)
167 blob_sizes
.lbs_inode
= sizeof(struct rcu_head
);
168 lsm_set_blob_size(&needed
->lbs_inode
, &blob_sizes
.lbs_inode
);
169 lsm_set_blob_size(&needed
->lbs_ipc
, &blob_sizes
.lbs_ipc
);
170 lsm_set_blob_size(&needed
->lbs_msg_msg
, &blob_sizes
.lbs_msg_msg
);
171 lsm_set_blob_size(&needed
->lbs_task
, &blob_sizes
.lbs_task
);
174 /* Prepare LSM for initialization. */
175 static void __init
prepare_lsm(struct lsm_info
*lsm
)
177 int enabled
= lsm_allowed(lsm
);
179 /* Record enablement (to handle any following exclusive LSMs). */
180 set_enabled(lsm
, enabled
);
182 /* If enabled, do pre-initialization work. */
184 if ((lsm
->flags
& LSM_FLAG_EXCLUSIVE
) && !exclusive
) {
186 init_debug("exclusive chosen: %s\n", lsm
->name
);
189 lsm_set_blob_sizes(lsm
->blobs
);
193 /* Initialize a given LSM, if it is enabled. */
194 static void __init
initialize_lsm(struct lsm_info
*lsm
)
196 if (is_enabled(lsm
)) {
199 init_debug("initializing %s\n", lsm
->name
);
201 WARN(ret
, "%s failed to initialize: %d\n", lsm
->name
, ret
);
205 /* Populate ordered LSMs list from comma-separated LSM name list. */
206 static void __init
ordered_lsm_parse(const char *order
, const char *origin
)
208 struct lsm_info
*lsm
;
209 char *sep
, *name
, *next
;
211 /* LSM_ORDER_FIRST is always first. */
212 for (lsm
= __start_lsm_info
; lsm
< __end_lsm_info
; lsm
++) {
213 if (lsm
->order
== LSM_ORDER_FIRST
)
214 append_ordered_lsm(lsm
, "first");
217 /* Process "security=", if given. */
218 if (chosen_major_lsm
) {
219 struct lsm_info
*major
;
222 * To match the original "security=" behavior, this
223 * explicitly does NOT fallback to another Legacy Major
224 * if the selected one was separately disabled: disable
225 * all non-matching Legacy Major LSMs.
227 for (major
= __start_lsm_info
; major
< __end_lsm_info
;
229 if ((major
->flags
& LSM_FLAG_LEGACY_MAJOR
) &&
230 strcmp(major
->name
, chosen_major_lsm
) != 0) {
231 set_enabled(major
, false);
232 init_debug("security=%s disabled: %s\n",
233 chosen_major_lsm
, major
->name
);
238 sep
= kstrdup(order
, GFP_KERNEL
);
240 /* Walk the list, looking for matching LSMs. */
241 while ((name
= strsep(&next
, ",")) != NULL
) {
244 for (lsm
= __start_lsm_info
; lsm
< __end_lsm_info
; lsm
++) {
245 if (lsm
->order
== LSM_ORDER_MUTABLE
&&
246 strcmp(lsm
->name
, name
) == 0) {
247 append_ordered_lsm(lsm
, origin
);
253 init_debug("%s ignored: %s\n", origin
, name
);
256 /* Process "security=", if given. */
257 if (chosen_major_lsm
) {
258 for (lsm
= __start_lsm_info
; lsm
< __end_lsm_info
; lsm
++) {
259 if (exists_ordered_lsm(lsm
))
261 if (strcmp(lsm
->name
, chosen_major_lsm
) == 0)
262 append_ordered_lsm(lsm
, "security=");
266 /* Disable all LSMs not in the ordered list. */
267 for (lsm
= __start_lsm_info
; lsm
< __end_lsm_info
; lsm
++) {
268 if (exists_ordered_lsm(lsm
))
270 set_enabled(lsm
, false);
271 init_debug("%s disabled: %s\n", origin
, lsm
->name
);
277 static void __init
lsm_early_cred(struct cred
*cred
);
278 static void __init
lsm_early_task(struct task_struct
*task
);
280 static void __init
ordered_lsm_init(void)
282 struct lsm_info
**lsm
;
284 ordered_lsms
= kcalloc(LSM_COUNT
+ 1, sizeof(*ordered_lsms
),
287 if (chosen_lsm_order
) {
288 if (chosen_major_lsm
) {
289 pr_info("security= is ignored because it is superseded by lsm=\n");
290 chosen_major_lsm
= NULL
;
292 ordered_lsm_parse(chosen_lsm_order
, "cmdline");
294 ordered_lsm_parse(builtin_lsm_order
, "builtin");
296 for (lsm
= ordered_lsms
; *lsm
; lsm
++)
299 init_debug("cred blob size = %d\n", blob_sizes
.lbs_cred
);
300 init_debug("file blob size = %d\n", blob_sizes
.lbs_file
);
301 init_debug("inode blob size = %d\n", blob_sizes
.lbs_inode
);
302 init_debug("ipc blob size = %d\n", blob_sizes
.lbs_ipc
);
303 init_debug("msg_msg blob size = %d\n", blob_sizes
.lbs_msg_msg
);
304 init_debug("task blob size = %d\n", blob_sizes
.lbs_task
);
307 * Create any kmem_caches needed for blobs
309 if (blob_sizes
.lbs_file
)
310 lsm_file_cache
= kmem_cache_create("lsm_file_cache",
311 blob_sizes
.lbs_file
, 0,
313 if (blob_sizes
.lbs_inode
)
314 lsm_inode_cache
= kmem_cache_create("lsm_inode_cache",
315 blob_sizes
.lbs_inode
, 0,
318 lsm_early_cred((struct cred
*) current
->cred
);
319 lsm_early_task(current
);
320 for (lsm
= ordered_lsms
; *lsm
; lsm
++)
321 initialize_lsm(*lsm
);
327 * security_init - initializes the security framework
329 * This should be called early in the kernel initialization sequence.
331 int __init
security_init(void)
334 struct hlist_head
*list
= (struct hlist_head
*) &security_hook_heads
;
336 pr_info("Security Framework initializing\n");
338 for (i
= 0; i
< sizeof(security_hook_heads
) / sizeof(struct hlist_head
);
340 INIT_HLIST_HEAD(&list
[i
]);
342 /* Load LSMs in specified order. */
348 /* Save user chosen LSM */
349 static int __init
choose_major_lsm(char *str
)
351 chosen_major_lsm
= str
;
354 __setup("security=", choose_major_lsm
);
356 /* Explicitly choose LSM initialization order. */
357 static int __init
choose_lsm_order(char *str
)
359 chosen_lsm_order
= str
;
362 __setup("lsm=", choose_lsm_order
);
364 /* Enable LSM order debugging. */
365 static int __init
enable_debug(char *str
)
370 __setup("lsm.debug", enable_debug
);
372 static bool match_last_lsm(const char *list
, const char *lsm
)
376 if (WARN_ON(!list
|| !lsm
))
378 last
= strrchr(list
, ',');
380 /* Pass the comma, strcmp() will check for '\0' */
384 return !strcmp(last
, lsm
);
387 static int lsm_append(char *new, char **result
)
391 if (*result
== NULL
) {
392 *result
= kstrdup(new, GFP_KERNEL
);
396 /* Check if it is the last registered name */
397 if (match_last_lsm(*result
, new))
399 cp
= kasprintf(GFP_KERNEL
, "%s,%s", *result
, new);
409 * security_add_hooks - Add a modules hooks to the hook lists.
410 * @hooks: the hooks to add
411 * @count: the number of hooks to add
412 * @lsm: the name of the security module
414 * Each LSM has to register its hooks with the infrastructure.
416 void __init
security_add_hooks(struct security_hook_list
*hooks
, int count
,
421 for (i
= 0; i
< count
; i
++) {
423 hlist_add_tail_rcu(&hooks
[i
].list
, hooks
[i
].head
);
425 if (lsm_append(lsm
, &lsm_names
) < 0)
426 panic("%s - Cannot get early memory.\n", __func__
);
429 int call_lsm_notifier(enum lsm_event event
, void *data
)
431 return atomic_notifier_call_chain(&lsm_notifier_chain
, event
, data
);
433 EXPORT_SYMBOL(call_lsm_notifier
);
435 int register_lsm_notifier(struct notifier_block
*nb
)
437 return atomic_notifier_chain_register(&lsm_notifier_chain
, nb
);
439 EXPORT_SYMBOL(register_lsm_notifier
);
441 int unregister_lsm_notifier(struct notifier_block
*nb
)
443 return atomic_notifier_chain_unregister(&lsm_notifier_chain
, nb
);
445 EXPORT_SYMBOL(unregister_lsm_notifier
);
448 * lsm_cred_alloc - allocate a composite cred blob
449 * @cred: the cred that needs a blob
450 * @gfp: allocation type
452 * Allocate the cred blob for all the modules
454 * Returns 0, or -ENOMEM if memory can't be allocated.
456 static int lsm_cred_alloc(struct cred
*cred
, gfp_t gfp
)
458 if (blob_sizes
.lbs_cred
== 0) {
459 cred
->security
= NULL
;
463 cred
->security
= kzalloc(blob_sizes
.lbs_cred
, gfp
);
464 if (cred
->security
== NULL
)
470 * lsm_early_cred - during initialization allocate a composite cred blob
471 * @cred: the cred that needs a blob
473 * Allocate the cred blob for all the modules
475 static void __init
lsm_early_cred(struct cred
*cred
)
477 int rc
= lsm_cred_alloc(cred
, GFP_KERNEL
);
480 panic("%s: Early cred alloc failed.\n", __func__
);
484 * lsm_file_alloc - allocate a composite file blob
485 * @file: the file that needs a blob
487 * Allocate the file blob for all the modules
489 * Returns 0, or -ENOMEM if memory can't be allocated.
491 static int lsm_file_alloc(struct file
*file
)
493 if (!lsm_file_cache
) {
494 file
->f_security
= NULL
;
498 file
->f_security
= kmem_cache_zalloc(lsm_file_cache
, GFP_KERNEL
);
499 if (file
->f_security
== NULL
)
505 * lsm_inode_alloc - allocate a composite inode blob
506 * @inode: the inode that needs a blob
508 * Allocate the inode blob for all the modules
510 * Returns 0, or -ENOMEM if memory can't be allocated.
512 int lsm_inode_alloc(struct inode
*inode
)
514 if (!lsm_inode_cache
) {
515 inode
->i_security
= NULL
;
519 inode
->i_security
= kmem_cache_zalloc(lsm_inode_cache
, GFP_NOFS
);
520 if (inode
->i_security
== NULL
)
526 * lsm_task_alloc - allocate a composite task blob
527 * @task: the task that needs a blob
529 * Allocate the task blob for all the modules
531 * Returns 0, or -ENOMEM if memory can't be allocated.
533 static int lsm_task_alloc(struct task_struct
*task
)
535 if (blob_sizes
.lbs_task
== 0) {
536 task
->security
= NULL
;
540 task
->security
= kzalloc(blob_sizes
.lbs_task
, GFP_KERNEL
);
541 if (task
->security
== NULL
)
547 * lsm_ipc_alloc - allocate a composite ipc blob
548 * @kip: the ipc that needs a blob
550 * Allocate the ipc blob for all the modules
552 * Returns 0, or -ENOMEM if memory can't be allocated.
554 static int lsm_ipc_alloc(struct kern_ipc_perm
*kip
)
556 if (blob_sizes
.lbs_ipc
== 0) {
557 kip
->security
= NULL
;
561 kip
->security
= kzalloc(blob_sizes
.lbs_ipc
, GFP_KERNEL
);
562 if (kip
->security
== NULL
)
568 * lsm_msg_msg_alloc - allocate a composite msg_msg blob
569 * @mp: the msg_msg that needs a blob
571 * Allocate the ipc blob for all the modules
573 * Returns 0, or -ENOMEM if memory can't be allocated.
575 static int lsm_msg_msg_alloc(struct msg_msg
*mp
)
577 if (blob_sizes
.lbs_msg_msg
== 0) {
582 mp
->security
= kzalloc(blob_sizes
.lbs_msg_msg
, GFP_KERNEL
);
583 if (mp
->security
== NULL
)
589 * lsm_early_task - during initialization allocate a composite task blob
590 * @task: the task that needs a blob
592 * Allocate the task blob for all the modules
594 static void __init
lsm_early_task(struct task_struct
*task
)
596 int rc
= lsm_task_alloc(task
);
599 panic("%s: Early task alloc failed.\n", __func__
);
603 * Hook list operation macros.
606 * This is a hook that does not return a value.
609 * This is a hook that returns a value.
612 #define call_void_hook(FUNC, ...) \
614 struct security_hook_list *P; \
616 hlist_for_each_entry(P, &security_hook_heads.FUNC, list) \
617 P->hook.FUNC(__VA_ARGS__); \
620 #define call_int_hook(FUNC, IRC, ...) ({ \
623 struct security_hook_list *P; \
625 hlist_for_each_entry(P, &security_hook_heads.FUNC, list) { \
626 RC = P->hook.FUNC(__VA_ARGS__); \
634 /* Security operations */
636 int security_binder_set_context_mgr(struct task_struct
*mgr
)
638 return call_int_hook(binder_set_context_mgr
, 0, mgr
);
641 int security_binder_transaction(struct task_struct
*from
,
642 struct task_struct
*to
)
644 return call_int_hook(binder_transaction
, 0, from
, to
);
647 int security_binder_transfer_binder(struct task_struct
*from
,
648 struct task_struct
*to
)
650 return call_int_hook(binder_transfer_binder
, 0, from
, to
);
653 int security_binder_transfer_file(struct task_struct
*from
,
654 struct task_struct
*to
, struct file
*file
)
656 return call_int_hook(binder_transfer_file
, 0, from
, to
, file
);
659 int security_ptrace_access_check(struct task_struct
*child
, unsigned int mode
)
661 return call_int_hook(ptrace_access_check
, 0, child
, mode
);
664 int security_ptrace_traceme(struct task_struct
*parent
)
666 return call_int_hook(ptrace_traceme
, 0, parent
);
669 int security_capget(struct task_struct
*target
,
670 kernel_cap_t
*effective
,
671 kernel_cap_t
*inheritable
,
672 kernel_cap_t
*permitted
)
674 return call_int_hook(capget
, 0, target
,
675 effective
, inheritable
, permitted
);
678 int security_capset(struct cred
*new, const struct cred
*old
,
679 const kernel_cap_t
*effective
,
680 const kernel_cap_t
*inheritable
,
681 const kernel_cap_t
*permitted
)
683 return call_int_hook(capset
, 0, new, old
,
684 effective
, inheritable
, permitted
);
687 int security_capable(const struct cred
*cred
,
688 struct user_namespace
*ns
,
692 return call_int_hook(capable
, 0, cred
, ns
, cap
, opts
);
695 int security_quotactl(int cmds
, int type
, int id
, struct super_block
*sb
)
697 return call_int_hook(quotactl
, 0, cmds
, type
, id
, sb
);
700 int security_quota_on(struct dentry
*dentry
)
702 return call_int_hook(quota_on
, 0, dentry
);
705 int security_syslog(int type
)
707 return call_int_hook(syslog
, 0, type
);
710 int security_settime64(const struct timespec64
*ts
, const struct timezone
*tz
)
712 return call_int_hook(settime
, 0, ts
, tz
);
715 int security_vm_enough_memory_mm(struct mm_struct
*mm
, long pages
)
717 struct security_hook_list
*hp
;
718 int cap_sys_admin
= 1;
722 * The module will respond with a positive value if
723 * it thinks the __vm_enough_memory() call should be
724 * made with the cap_sys_admin set. If all of the modules
725 * agree that it should be set it will. If any module
726 * thinks it should not be set it won't.
728 hlist_for_each_entry(hp
, &security_hook_heads
.vm_enough_memory
, list
) {
729 rc
= hp
->hook
.vm_enough_memory(mm
, pages
);
735 return __vm_enough_memory(mm
, pages
, cap_sys_admin
);
738 int security_bprm_set_creds(struct linux_binprm
*bprm
)
740 return call_int_hook(bprm_set_creds
, 0, bprm
);
743 int security_bprm_check(struct linux_binprm
*bprm
)
747 ret
= call_int_hook(bprm_check_security
, 0, bprm
);
750 return ima_bprm_check(bprm
);
753 void security_bprm_committing_creds(struct linux_binprm
*bprm
)
755 call_void_hook(bprm_committing_creds
, bprm
);
758 void security_bprm_committed_creds(struct linux_binprm
*bprm
)
760 call_void_hook(bprm_committed_creds
, bprm
);
763 int security_fs_context_dup(struct fs_context
*fc
, struct fs_context
*src_fc
)
765 return call_int_hook(fs_context_dup
, 0, fc
, src_fc
);
768 int security_fs_context_parse_param(struct fs_context
*fc
, struct fs_parameter
*param
)
770 return call_int_hook(fs_context_parse_param
, -ENOPARAM
, fc
, param
);
773 int security_sb_alloc(struct super_block
*sb
)
775 return call_int_hook(sb_alloc_security
, 0, sb
);
778 void security_sb_free(struct super_block
*sb
)
780 call_void_hook(sb_free_security
, sb
);
783 void security_free_mnt_opts(void **mnt_opts
)
787 call_void_hook(sb_free_mnt_opts
, *mnt_opts
);
790 EXPORT_SYMBOL(security_free_mnt_opts
);
792 int security_sb_eat_lsm_opts(char *options
, void **mnt_opts
)
794 return call_int_hook(sb_eat_lsm_opts
, 0, options
, mnt_opts
);
796 EXPORT_SYMBOL(security_sb_eat_lsm_opts
);
798 int security_sb_remount(struct super_block
*sb
,
801 return call_int_hook(sb_remount
, 0, sb
, mnt_opts
);
803 EXPORT_SYMBOL(security_sb_remount
);
805 int security_sb_kern_mount(struct super_block
*sb
)
807 return call_int_hook(sb_kern_mount
, 0, sb
);
810 int security_sb_show_options(struct seq_file
*m
, struct super_block
*sb
)
812 return call_int_hook(sb_show_options
, 0, m
, sb
);
815 int security_sb_statfs(struct dentry
*dentry
)
817 return call_int_hook(sb_statfs
, 0, dentry
);
820 int security_sb_mount(const char *dev_name
, const struct path
*path
,
821 const char *type
, unsigned long flags
, void *data
)
823 return call_int_hook(sb_mount
, 0, dev_name
, path
, type
, flags
, data
);
826 int security_sb_umount(struct vfsmount
*mnt
, int flags
)
828 return call_int_hook(sb_umount
, 0, mnt
, flags
);
831 int security_sb_pivotroot(const struct path
*old_path
, const struct path
*new_path
)
833 return call_int_hook(sb_pivotroot
, 0, old_path
, new_path
);
836 int security_sb_set_mnt_opts(struct super_block
*sb
,
838 unsigned long kern_flags
,
839 unsigned long *set_kern_flags
)
841 return call_int_hook(sb_set_mnt_opts
,
842 mnt_opts
? -EOPNOTSUPP
: 0, sb
,
843 mnt_opts
, kern_flags
, set_kern_flags
);
845 EXPORT_SYMBOL(security_sb_set_mnt_opts
);
847 int security_sb_clone_mnt_opts(const struct super_block
*oldsb
,
848 struct super_block
*newsb
,
849 unsigned long kern_flags
,
850 unsigned long *set_kern_flags
)
852 return call_int_hook(sb_clone_mnt_opts
, 0, oldsb
, newsb
,
853 kern_flags
, set_kern_flags
);
855 EXPORT_SYMBOL(security_sb_clone_mnt_opts
);
857 int security_add_mnt_opt(const char *option
, const char *val
, int len
,
860 return call_int_hook(sb_add_mnt_opt
, -EINVAL
,
861 option
, val
, len
, mnt_opts
);
863 EXPORT_SYMBOL(security_add_mnt_opt
);
865 int security_move_mount(const struct path
*from_path
, const struct path
*to_path
)
867 return call_int_hook(move_mount
, 0, from_path
, to_path
);
870 int security_inode_alloc(struct inode
*inode
)
872 int rc
= lsm_inode_alloc(inode
);
876 rc
= call_int_hook(inode_alloc_security
, 0, inode
);
878 security_inode_free(inode
);
882 static void inode_free_by_rcu(struct rcu_head
*head
)
885 * The rcu head is at the start of the inode blob
887 kmem_cache_free(lsm_inode_cache
, head
);
890 void security_inode_free(struct inode
*inode
)
892 integrity_inode_free(inode
);
893 call_void_hook(inode_free_security
, inode
);
895 * The inode may still be referenced in a path walk and
896 * a call to security_inode_permission() can be made
897 * after inode_free_security() is called. Ideally, the VFS
898 * wouldn't do this, but fixing that is a much harder
899 * job. For now, simply free the i_security via RCU, and
900 * leave the current inode->i_security pointer intact.
901 * The inode will be freed after the RCU grace period too.
903 if (inode
->i_security
)
904 call_rcu((struct rcu_head
*)inode
->i_security
,
908 int security_dentry_init_security(struct dentry
*dentry
, int mode
,
909 const struct qstr
*name
, void **ctx
,
912 return call_int_hook(dentry_init_security
, -EOPNOTSUPP
, dentry
, mode
,
915 EXPORT_SYMBOL(security_dentry_init_security
);
917 int security_dentry_create_files_as(struct dentry
*dentry
, int mode
,
919 const struct cred
*old
, struct cred
*new)
921 return call_int_hook(dentry_create_files_as
, 0, dentry
, mode
,
924 EXPORT_SYMBOL(security_dentry_create_files_as
);
926 int security_inode_init_security(struct inode
*inode
, struct inode
*dir
,
927 const struct qstr
*qstr
,
928 const initxattrs initxattrs
, void *fs_data
)
930 struct xattr new_xattrs
[MAX_LSM_EVM_XATTR
+ 1];
931 struct xattr
*lsm_xattr
, *evm_xattr
, *xattr
;
934 if (unlikely(IS_PRIVATE(inode
)))
938 return call_int_hook(inode_init_security
, -EOPNOTSUPP
, inode
,
939 dir
, qstr
, NULL
, NULL
, NULL
);
940 memset(new_xattrs
, 0, sizeof(new_xattrs
));
941 lsm_xattr
= new_xattrs
;
942 ret
= call_int_hook(inode_init_security
, -EOPNOTSUPP
, inode
, dir
, qstr
,
945 &lsm_xattr
->value_len
);
949 evm_xattr
= lsm_xattr
+ 1;
950 ret
= evm_inode_init_security(inode
, lsm_xattr
, evm_xattr
);
953 ret
= initxattrs(inode
, new_xattrs
, fs_data
);
955 for (xattr
= new_xattrs
; xattr
->value
!= NULL
; xattr
++)
957 return (ret
== -EOPNOTSUPP
) ? 0 : ret
;
959 EXPORT_SYMBOL(security_inode_init_security
);
961 int security_old_inode_init_security(struct inode
*inode
, struct inode
*dir
,
962 const struct qstr
*qstr
, const char **name
,
963 void **value
, size_t *len
)
965 if (unlikely(IS_PRIVATE(inode
)))
967 return call_int_hook(inode_init_security
, -EOPNOTSUPP
, inode
, dir
,
968 qstr
, name
, value
, len
);
970 EXPORT_SYMBOL(security_old_inode_init_security
);
972 #ifdef CONFIG_SECURITY_PATH
973 int security_path_mknod(const struct path
*dir
, struct dentry
*dentry
, umode_t mode
,
976 if (unlikely(IS_PRIVATE(d_backing_inode(dir
->dentry
))))
978 return call_int_hook(path_mknod
, 0, dir
, dentry
, mode
, dev
);
980 EXPORT_SYMBOL(security_path_mknod
);
982 int security_path_mkdir(const struct path
*dir
, struct dentry
*dentry
, umode_t mode
)
984 if (unlikely(IS_PRIVATE(d_backing_inode(dir
->dentry
))))
986 return call_int_hook(path_mkdir
, 0, dir
, dentry
, mode
);
988 EXPORT_SYMBOL(security_path_mkdir
);
990 int security_path_rmdir(const struct path
*dir
, struct dentry
*dentry
)
992 if (unlikely(IS_PRIVATE(d_backing_inode(dir
->dentry
))))
994 return call_int_hook(path_rmdir
, 0, dir
, dentry
);
997 int security_path_unlink(const struct path
*dir
, struct dentry
*dentry
)
999 if (unlikely(IS_PRIVATE(d_backing_inode(dir
->dentry
))))
1001 return call_int_hook(path_unlink
, 0, dir
, dentry
);
1003 EXPORT_SYMBOL(security_path_unlink
);
1005 int security_path_symlink(const struct path
*dir
, struct dentry
*dentry
,
1006 const char *old_name
)
1008 if (unlikely(IS_PRIVATE(d_backing_inode(dir
->dentry
))))
1010 return call_int_hook(path_symlink
, 0, dir
, dentry
, old_name
);
1013 int security_path_link(struct dentry
*old_dentry
, const struct path
*new_dir
,
1014 struct dentry
*new_dentry
)
1016 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry
))))
1018 return call_int_hook(path_link
, 0, old_dentry
, new_dir
, new_dentry
);
1021 int security_path_rename(const struct path
*old_dir
, struct dentry
*old_dentry
,
1022 const struct path
*new_dir
, struct dentry
*new_dentry
,
1025 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry
)) ||
1026 (d_is_positive(new_dentry
) && IS_PRIVATE(d_backing_inode(new_dentry
)))))
1029 if (flags
& RENAME_EXCHANGE
) {
1030 int err
= call_int_hook(path_rename
, 0, new_dir
, new_dentry
,
1031 old_dir
, old_dentry
);
1036 return call_int_hook(path_rename
, 0, old_dir
, old_dentry
, new_dir
,
1039 EXPORT_SYMBOL(security_path_rename
);
1041 int security_path_truncate(const struct path
*path
)
1043 if (unlikely(IS_PRIVATE(d_backing_inode(path
->dentry
))))
1045 return call_int_hook(path_truncate
, 0, path
);
1048 int security_path_chmod(const struct path
*path
, umode_t mode
)
1050 if (unlikely(IS_PRIVATE(d_backing_inode(path
->dentry
))))
1052 return call_int_hook(path_chmod
, 0, path
, mode
);
1055 int security_path_chown(const struct path
*path
, kuid_t uid
, kgid_t gid
)
1057 if (unlikely(IS_PRIVATE(d_backing_inode(path
->dentry
))))
1059 return call_int_hook(path_chown
, 0, path
, uid
, gid
);
1062 int security_path_chroot(const struct path
*path
)
1064 return call_int_hook(path_chroot
, 0, path
);
1068 int security_inode_create(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
)
1070 if (unlikely(IS_PRIVATE(dir
)))
1072 return call_int_hook(inode_create
, 0, dir
, dentry
, mode
);
1074 EXPORT_SYMBOL_GPL(security_inode_create
);
1076 int security_inode_link(struct dentry
*old_dentry
, struct inode
*dir
,
1077 struct dentry
*new_dentry
)
1079 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry
))))
1081 return call_int_hook(inode_link
, 0, old_dentry
, dir
, new_dentry
);
1084 int security_inode_unlink(struct inode
*dir
, struct dentry
*dentry
)
1086 if (unlikely(IS_PRIVATE(d_backing_inode(dentry
))))
1088 return call_int_hook(inode_unlink
, 0, dir
, dentry
);
1091 int security_inode_symlink(struct inode
*dir
, struct dentry
*dentry
,
1092 const char *old_name
)
1094 if (unlikely(IS_PRIVATE(dir
)))
1096 return call_int_hook(inode_symlink
, 0, dir
, dentry
, old_name
);
1099 int security_inode_mkdir(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
)
1101 if (unlikely(IS_PRIVATE(dir
)))
1103 return call_int_hook(inode_mkdir
, 0, dir
, dentry
, mode
);
1105 EXPORT_SYMBOL_GPL(security_inode_mkdir
);
1107 int security_inode_rmdir(struct inode
*dir
, struct dentry
*dentry
)
1109 if (unlikely(IS_PRIVATE(d_backing_inode(dentry
))))
1111 return call_int_hook(inode_rmdir
, 0, dir
, dentry
);
1114 int security_inode_mknod(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
, dev_t dev
)
1116 if (unlikely(IS_PRIVATE(dir
)))
1118 return call_int_hook(inode_mknod
, 0, dir
, dentry
, mode
, dev
);
1121 int security_inode_rename(struct inode
*old_dir
, struct dentry
*old_dentry
,
1122 struct inode
*new_dir
, struct dentry
*new_dentry
,
1125 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry
)) ||
1126 (d_is_positive(new_dentry
) && IS_PRIVATE(d_backing_inode(new_dentry
)))))
1129 if (flags
& RENAME_EXCHANGE
) {
1130 int err
= call_int_hook(inode_rename
, 0, new_dir
, new_dentry
,
1131 old_dir
, old_dentry
);
1136 return call_int_hook(inode_rename
, 0, old_dir
, old_dentry
,
1137 new_dir
, new_dentry
);
1140 int security_inode_readlink(struct dentry
*dentry
)
1142 if (unlikely(IS_PRIVATE(d_backing_inode(dentry
))))
1144 return call_int_hook(inode_readlink
, 0, dentry
);
1147 int security_inode_follow_link(struct dentry
*dentry
, struct inode
*inode
,
1150 if (unlikely(IS_PRIVATE(inode
)))
1152 return call_int_hook(inode_follow_link
, 0, dentry
, inode
, rcu
);
1155 int security_inode_permission(struct inode
*inode
, int mask
)
1157 if (unlikely(IS_PRIVATE(inode
)))
1159 return call_int_hook(inode_permission
, 0, inode
, mask
);
1162 int security_inode_setattr(struct dentry
*dentry
, struct iattr
*attr
)
1166 if (unlikely(IS_PRIVATE(d_backing_inode(dentry
))))
1168 ret
= call_int_hook(inode_setattr
, 0, dentry
, attr
);
1171 return evm_inode_setattr(dentry
, attr
);
1173 EXPORT_SYMBOL_GPL(security_inode_setattr
);
1175 int security_inode_getattr(const struct path
*path
)
1177 if (unlikely(IS_PRIVATE(d_backing_inode(path
->dentry
))))
1179 return call_int_hook(inode_getattr
, 0, path
);
1182 int security_inode_setxattr(struct dentry
*dentry
, const char *name
,
1183 const void *value
, size_t size
, int flags
)
1187 if (unlikely(IS_PRIVATE(d_backing_inode(dentry
))))
1190 * SELinux and Smack integrate the cap call,
1191 * so assume that all LSMs supplying this call do so.
1193 ret
= call_int_hook(inode_setxattr
, 1, dentry
, name
, value
, size
,
1197 ret
= cap_inode_setxattr(dentry
, name
, value
, size
, flags
);
1200 ret
= ima_inode_setxattr(dentry
, name
, value
, size
);
1203 return evm_inode_setxattr(dentry
, name
, value
, size
);
1206 void security_inode_post_setxattr(struct dentry
*dentry
, const char *name
,
1207 const void *value
, size_t size
, int flags
)
1209 if (unlikely(IS_PRIVATE(d_backing_inode(dentry
))))
1211 call_void_hook(inode_post_setxattr
, dentry
, name
, value
, size
, flags
);
1212 evm_inode_post_setxattr(dentry
, name
, value
, size
);
1215 int security_inode_getxattr(struct dentry
*dentry
, const char *name
)
1217 if (unlikely(IS_PRIVATE(d_backing_inode(dentry
))))
1219 return call_int_hook(inode_getxattr
, 0, dentry
, name
);
1222 int security_inode_listxattr(struct dentry
*dentry
)
1224 if (unlikely(IS_PRIVATE(d_backing_inode(dentry
))))
1226 return call_int_hook(inode_listxattr
, 0, dentry
);
1229 int security_inode_removexattr(struct dentry
*dentry
, const char *name
)
1233 if (unlikely(IS_PRIVATE(d_backing_inode(dentry
))))
1236 * SELinux and Smack integrate the cap call,
1237 * so assume that all LSMs supplying this call do so.
1239 ret
= call_int_hook(inode_removexattr
, 1, dentry
, name
);
1241 ret
= cap_inode_removexattr(dentry
, name
);
1244 ret
= ima_inode_removexattr(dentry
, name
);
1247 return evm_inode_removexattr(dentry
, name
);
1250 int security_inode_need_killpriv(struct dentry
*dentry
)
1252 return call_int_hook(inode_need_killpriv
, 0, dentry
);
1255 int security_inode_killpriv(struct dentry
*dentry
)
1257 return call_int_hook(inode_killpriv
, 0, dentry
);
1260 int security_inode_getsecurity(struct inode
*inode
, const char *name
, void **buffer
, bool alloc
)
1262 struct security_hook_list
*hp
;
1265 if (unlikely(IS_PRIVATE(inode
)))
1268 * Only one module will provide an attribute with a given name.
1270 hlist_for_each_entry(hp
, &security_hook_heads
.inode_getsecurity
, list
) {
1271 rc
= hp
->hook
.inode_getsecurity(inode
, name
, buffer
, alloc
);
1272 if (rc
!= -EOPNOTSUPP
)
1278 int security_inode_setsecurity(struct inode
*inode
, const char *name
, const void *value
, size_t size
, int flags
)
1280 struct security_hook_list
*hp
;
1283 if (unlikely(IS_PRIVATE(inode
)))
1286 * Only one module will provide an attribute with a given name.
1288 hlist_for_each_entry(hp
, &security_hook_heads
.inode_setsecurity
, list
) {
1289 rc
= hp
->hook
.inode_setsecurity(inode
, name
, value
, size
,
1291 if (rc
!= -EOPNOTSUPP
)
1297 int security_inode_listsecurity(struct inode
*inode
, char *buffer
, size_t buffer_size
)
1299 if (unlikely(IS_PRIVATE(inode
)))
1301 return call_int_hook(inode_listsecurity
, 0, inode
, buffer
, buffer_size
);
1303 EXPORT_SYMBOL(security_inode_listsecurity
);
1305 void security_inode_getsecid(struct inode
*inode
, u32
*secid
)
1307 call_void_hook(inode_getsecid
, inode
, secid
);
1310 int security_inode_copy_up(struct dentry
*src
, struct cred
**new)
1312 return call_int_hook(inode_copy_up
, 0, src
, new);
1314 EXPORT_SYMBOL(security_inode_copy_up
);
1316 int security_inode_copy_up_xattr(const char *name
)
1318 return call_int_hook(inode_copy_up_xattr
, -EOPNOTSUPP
, name
);
1320 EXPORT_SYMBOL(security_inode_copy_up_xattr
);
1322 int security_kernfs_init_security(struct kernfs_node
*kn_dir
,
1323 struct kernfs_node
*kn
)
1325 return call_int_hook(kernfs_init_security
, 0, kn_dir
, kn
);
1328 int security_file_permission(struct file
*file
, int mask
)
1332 ret
= call_int_hook(file_permission
, 0, file
, mask
);
1336 return fsnotify_perm(file
, mask
);
1339 int security_file_alloc(struct file
*file
)
1341 int rc
= lsm_file_alloc(file
);
1345 rc
= call_int_hook(file_alloc_security
, 0, file
);
1347 security_file_free(file
);
1351 void security_file_free(struct file
*file
)
1355 call_void_hook(file_free_security
, file
);
1357 blob
= file
->f_security
;
1359 file
->f_security
= NULL
;
1360 kmem_cache_free(lsm_file_cache
, blob
);
1364 int security_file_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
)
1366 return call_int_hook(file_ioctl
, 0, file
, cmd
, arg
);
1369 static inline unsigned long mmap_prot(struct file
*file
, unsigned long prot
)
1372 * Does we have PROT_READ and does the application expect
1373 * it to imply PROT_EXEC? If not, nothing to talk about...
1375 if ((prot
& (PROT_READ
| PROT_EXEC
)) != PROT_READ
)
1377 if (!(current
->personality
& READ_IMPLIES_EXEC
))
1380 * if that's an anonymous mapping, let it.
1383 return prot
| PROT_EXEC
;
1385 * ditto if it's not on noexec mount, except that on !MMU we need
1386 * NOMMU_MAP_EXEC (== VM_MAYEXEC) in this case
1388 if (!path_noexec(&file
->f_path
)) {
1390 if (file
->f_op
->mmap_capabilities
) {
1391 unsigned caps
= file
->f_op
->mmap_capabilities(file
);
1392 if (!(caps
& NOMMU_MAP_EXEC
))
1396 return prot
| PROT_EXEC
;
1398 /* anything on noexec mount won't get PROT_EXEC */
1402 int security_mmap_file(struct file
*file
, unsigned long prot
,
1403 unsigned long flags
)
1406 ret
= call_int_hook(mmap_file
, 0, file
, prot
,
1407 mmap_prot(file
, prot
), flags
);
1410 return ima_file_mmap(file
, prot
);
1413 int security_mmap_addr(unsigned long addr
)
1415 return call_int_hook(mmap_addr
, 0, addr
);
1418 int security_file_mprotect(struct vm_area_struct
*vma
, unsigned long reqprot
,
1421 return call_int_hook(file_mprotect
, 0, vma
, reqprot
, prot
);
1424 int security_file_lock(struct file
*file
, unsigned int cmd
)
1426 return call_int_hook(file_lock
, 0, file
, cmd
);
1429 int security_file_fcntl(struct file
*file
, unsigned int cmd
, unsigned long arg
)
1431 return call_int_hook(file_fcntl
, 0, file
, cmd
, arg
);
1434 void security_file_set_fowner(struct file
*file
)
1436 call_void_hook(file_set_fowner
, file
);
1439 int security_file_send_sigiotask(struct task_struct
*tsk
,
1440 struct fown_struct
*fown
, int sig
)
1442 return call_int_hook(file_send_sigiotask
, 0, tsk
, fown
, sig
);
1445 int security_file_receive(struct file
*file
)
1447 return call_int_hook(file_receive
, 0, file
);
1450 int security_file_open(struct file
*file
)
1454 ret
= call_int_hook(file_open
, 0, file
);
1458 return fsnotify_perm(file
, MAY_OPEN
);
1461 int security_task_alloc(struct task_struct
*task
, unsigned long clone_flags
)
1463 int rc
= lsm_task_alloc(task
);
1467 rc
= call_int_hook(task_alloc
, 0, task
, clone_flags
);
1469 security_task_free(task
);
1473 void security_task_free(struct task_struct
*task
)
1475 call_void_hook(task_free
, task
);
1477 kfree(task
->security
);
1478 task
->security
= NULL
;
1481 int security_cred_alloc_blank(struct cred
*cred
, gfp_t gfp
)
1483 int rc
= lsm_cred_alloc(cred
, gfp
);
1488 rc
= call_int_hook(cred_alloc_blank
, 0, cred
, gfp
);
1490 security_cred_free(cred
);
1494 void security_cred_free(struct cred
*cred
)
1497 * There is a failure case in prepare_creds() that
1498 * may result in a call here with ->security being NULL.
1500 if (unlikely(cred
->security
== NULL
))
1503 call_void_hook(cred_free
, cred
);
1505 kfree(cred
->security
);
1506 cred
->security
= NULL
;
1509 int security_prepare_creds(struct cred
*new, const struct cred
*old
, gfp_t gfp
)
1511 int rc
= lsm_cred_alloc(new, gfp
);
1516 rc
= call_int_hook(cred_prepare
, 0, new, old
, gfp
);
1518 security_cred_free(new);
1522 void security_transfer_creds(struct cred
*new, const struct cred
*old
)
1524 call_void_hook(cred_transfer
, new, old
);
1527 void security_cred_getsecid(const struct cred
*c
, u32
*secid
)
1530 call_void_hook(cred_getsecid
, c
, secid
);
1532 EXPORT_SYMBOL(security_cred_getsecid
);
1534 int security_kernel_act_as(struct cred
*new, u32 secid
)
1536 return call_int_hook(kernel_act_as
, 0, new, secid
);
1539 int security_kernel_create_files_as(struct cred
*new, struct inode
*inode
)
1541 return call_int_hook(kernel_create_files_as
, 0, new, inode
);
1544 int security_kernel_module_request(char *kmod_name
)
1548 ret
= call_int_hook(kernel_module_request
, 0, kmod_name
);
1551 return integrity_kernel_module_request(kmod_name
);
1554 int security_kernel_read_file(struct file
*file
, enum kernel_read_file_id id
)
1558 ret
= call_int_hook(kernel_read_file
, 0, file
, id
);
1561 return ima_read_file(file
, id
);
1563 EXPORT_SYMBOL_GPL(security_kernel_read_file
);
1565 int security_kernel_post_read_file(struct file
*file
, char *buf
, loff_t size
,
1566 enum kernel_read_file_id id
)
1570 ret
= call_int_hook(kernel_post_read_file
, 0, file
, buf
, size
, id
);
1573 return ima_post_read_file(file
, buf
, size
, id
);
1575 EXPORT_SYMBOL_GPL(security_kernel_post_read_file
);
1577 int security_kernel_load_data(enum kernel_load_data_id id
)
1581 ret
= call_int_hook(kernel_load_data
, 0, id
);
1584 return ima_load_data(id
);
1586 EXPORT_SYMBOL_GPL(security_kernel_load_data
);
1588 int security_task_fix_setuid(struct cred
*new, const struct cred
*old
,
1591 return call_int_hook(task_fix_setuid
, 0, new, old
, flags
);
1594 int security_task_setpgid(struct task_struct
*p
, pid_t pgid
)
1596 return call_int_hook(task_setpgid
, 0, p
, pgid
);
1599 int security_task_getpgid(struct task_struct
*p
)
1601 return call_int_hook(task_getpgid
, 0, p
);
1604 int security_task_getsid(struct task_struct
*p
)
1606 return call_int_hook(task_getsid
, 0, p
);
1609 void security_task_getsecid(struct task_struct
*p
, u32
*secid
)
1612 call_void_hook(task_getsecid
, p
, secid
);
1614 EXPORT_SYMBOL(security_task_getsecid
);
1616 int security_task_setnice(struct task_struct
*p
, int nice
)
1618 return call_int_hook(task_setnice
, 0, p
, nice
);
1621 int security_task_setioprio(struct task_struct
*p
, int ioprio
)
1623 return call_int_hook(task_setioprio
, 0, p
, ioprio
);
1626 int security_task_getioprio(struct task_struct
*p
)
1628 return call_int_hook(task_getioprio
, 0, p
);
1631 int security_task_prlimit(const struct cred
*cred
, const struct cred
*tcred
,
1634 return call_int_hook(task_prlimit
, 0, cred
, tcred
, flags
);
1637 int security_task_setrlimit(struct task_struct
*p
, unsigned int resource
,
1638 struct rlimit
*new_rlim
)
1640 return call_int_hook(task_setrlimit
, 0, p
, resource
, new_rlim
);
1643 int security_task_setscheduler(struct task_struct
*p
)
1645 return call_int_hook(task_setscheduler
, 0, p
);
1648 int security_task_getscheduler(struct task_struct
*p
)
1650 return call_int_hook(task_getscheduler
, 0, p
);
1653 int security_task_movememory(struct task_struct
*p
)
1655 return call_int_hook(task_movememory
, 0, p
);
1658 int security_task_kill(struct task_struct
*p
, struct kernel_siginfo
*info
,
1659 int sig
, const struct cred
*cred
)
1661 return call_int_hook(task_kill
, 0, p
, info
, sig
, cred
);
1664 int security_task_prctl(int option
, unsigned long arg2
, unsigned long arg3
,
1665 unsigned long arg4
, unsigned long arg5
)
1669 struct security_hook_list
*hp
;
1671 hlist_for_each_entry(hp
, &security_hook_heads
.task_prctl
, list
) {
1672 thisrc
= hp
->hook
.task_prctl(option
, arg2
, arg3
, arg4
, arg5
);
1673 if (thisrc
!= -ENOSYS
) {
1682 void security_task_to_inode(struct task_struct
*p
, struct inode
*inode
)
1684 call_void_hook(task_to_inode
, p
, inode
);
1687 int security_ipc_permission(struct kern_ipc_perm
*ipcp
, short flag
)
1689 return call_int_hook(ipc_permission
, 0, ipcp
, flag
);
1692 void security_ipc_getsecid(struct kern_ipc_perm
*ipcp
, u32
*secid
)
1695 call_void_hook(ipc_getsecid
, ipcp
, secid
);
1698 int security_msg_msg_alloc(struct msg_msg
*msg
)
1700 int rc
= lsm_msg_msg_alloc(msg
);
1704 rc
= call_int_hook(msg_msg_alloc_security
, 0, msg
);
1706 security_msg_msg_free(msg
);
1710 void security_msg_msg_free(struct msg_msg
*msg
)
1712 call_void_hook(msg_msg_free_security
, msg
);
1713 kfree(msg
->security
);
1714 msg
->security
= NULL
;
1717 int security_msg_queue_alloc(struct kern_ipc_perm
*msq
)
1719 int rc
= lsm_ipc_alloc(msq
);
1723 rc
= call_int_hook(msg_queue_alloc_security
, 0, msq
);
1725 security_msg_queue_free(msq
);
1729 void security_msg_queue_free(struct kern_ipc_perm
*msq
)
1731 call_void_hook(msg_queue_free_security
, msq
);
1732 kfree(msq
->security
);
1733 msq
->security
= NULL
;
1736 int security_msg_queue_associate(struct kern_ipc_perm
*msq
, int msqflg
)
1738 return call_int_hook(msg_queue_associate
, 0, msq
, msqflg
);
1741 int security_msg_queue_msgctl(struct kern_ipc_perm
*msq
, int cmd
)
1743 return call_int_hook(msg_queue_msgctl
, 0, msq
, cmd
);
1746 int security_msg_queue_msgsnd(struct kern_ipc_perm
*msq
,
1747 struct msg_msg
*msg
, int msqflg
)
1749 return call_int_hook(msg_queue_msgsnd
, 0, msq
, msg
, msqflg
);
1752 int security_msg_queue_msgrcv(struct kern_ipc_perm
*msq
, struct msg_msg
*msg
,
1753 struct task_struct
*target
, long type
, int mode
)
1755 return call_int_hook(msg_queue_msgrcv
, 0, msq
, msg
, target
, type
, mode
);
1758 int security_shm_alloc(struct kern_ipc_perm
*shp
)
1760 int rc
= lsm_ipc_alloc(shp
);
1764 rc
= call_int_hook(shm_alloc_security
, 0, shp
);
1766 security_shm_free(shp
);
1770 void security_shm_free(struct kern_ipc_perm
*shp
)
1772 call_void_hook(shm_free_security
, shp
);
1773 kfree(shp
->security
);
1774 shp
->security
= NULL
;
1777 int security_shm_associate(struct kern_ipc_perm
*shp
, int shmflg
)
1779 return call_int_hook(shm_associate
, 0, shp
, shmflg
);
1782 int security_shm_shmctl(struct kern_ipc_perm
*shp
, int cmd
)
1784 return call_int_hook(shm_shmctl
, 0, shp
, cmd
);
1787 int security_shm_shmat(struct kern_ipc_perm
*shp
, char __user
*shmaddr
, int shmflg
)
1789 return call_int_hook(shm_shmat
, 0, shp
, shmaddr
, shmflg
);
1792 int security_sem_alloc(struct kern_ipc_perm
*sma
)
1794 int rc
= lsm_ipc_alloc(sma
);
1798 rc
= call_int_hook(sem_alloc_security
, 0, sma
);
1800 security_sem_free(sma
);
1804 void security_sem_free(struct kern_ipc_perm
*sma
)
1806 call_void_hook(sem_free_security
, sma
);
1807 kfree(sma
->security
);
1808 sma
->security
= NULL
;
1811 int security_sem_associate(struct kern_ipc_perm
*sma
, int semflg
)
1813 return call_int_hook(sem_associate
, 0, sma
, semflg
);
1816 int security_sem_semctl(struct kern_ipc_perm
*sma
, int cmd
)
1818 return call_int_hook(sem_semctl
, 0, sma
, cmd
);
1821 int security_sem_semop(struct kern_ipc_perm
*sma
, struct sembuf
*sops
,
1822 unsigned nsops
, int alter
)
1824 return call_int_hook(sem_semop
, 0, sma
, sops
, nsops
, alter
);
1827 void security_d_instantiate(struct dentry
*dentry
, struct inode
*inode
)
1829 if (unlikely(inode
&& IS_PRIVATE(inode
)))
1831 call_void_hook(d_instantiate
, dentry
, inode
);
1833 EXPORT_SYMBOL(security_d_instantiate
);
1835 int security_getprocattr(struct task_struct
*p
, const char *lsm
, char *name
,
1838 struct security_hook_list
*hp
;
1840 hlist_for_each_entry(hp
, &security_hook_heads
.getprocattr
, list
) {
1841 if (lsm
!= NULL
&& strcmp(lsm
, hp
->lsm
))
1843 return hp
->hook
.getprocattr(p
, name
, value
);
1848 int security_setprocattr(const char *lsm
, const char *name
, void *value
,
1851 struct security_hook_list
*hp
;
1853 hlist_for_each_entry(hp
, &security_hook_heads
.setprocattr
, list
) {
1854 if (lsm
!= NULL
&& strcmp(lsm
, hp
->lsm
))
1856 return hp
->hook
.setprocattr(name
, value
, size
);
1861 int security_netlink_send(struct sock
*sk
, struct sk_buff
*skb
)
1863 return call_int_hook(netlink_send
, 0, sk
, skb
);
1866 int security_ismaclabel(const char *name
)
1868 return call_int_hook(ismaclabel
, 0, name
);
1870 EXPORT_SYMBOL(security_ismaclabel
);
1872 int security_secid_to_secctx(u32 secid
, char **secdata
, u32
*seclen
)
1874 return call_int_hook(secid_to_secctx
, -EOPNOTSUPP
, secid
, secdata
,
1877 EXPORT_SYMBOL(security_secid_to_secctx
);
1879 int security_secctx_to_secid(const char *secdata
, u32 seclen
, u32
*secid
)
1882 return call_int_hook(secctx_to_secid
, 0, secdata
, seclen
, secid
);
1884 EXPORT_SYMBOL(security_secctx_to_secid
);
1886 void security_release_secctx(char *secdata
, u32 seclen
)
1888 call_void_hook(release_secctx
, secdata
, seclen
);
1890 EXPORT_SYMBOL(security_release_secctx
);
1892 void security_inode_invalidate_secctx(struct inode
*inode
)
1894 call_void_hook(inode_invalidate_secctx
, inode
);
1896 EXPORT_SYMBOL(security_inode_invalidate_secctx
);
1898 int security_inode_notifysecctx(struct inode
*inode
, void *ctx
, u32 ctxlen
)
1900 return call_int_hook(inode_notifysecctx
, 0, inode
, ctx
, ctxlen
);
1902 EXPORT_SYMBOL(security_inode_notifysecctx
);
1904 int security_inode_setsecctx(struct dentry
*dentry
, void *ctx
, u32 ctxlen
)
1906 return call_int_hook(inode_setsecctx
, 0, dentry
, ctx
, ctxlen
);
1908 EXPORT_SYMBOL(security_inode_setsecctx
);
1910 int security_inode_getsecctx(struct inode
*inode
, void **ctx
, u32
*ctxlen
)
1912 return call_int_hook(inode_getsecctx
, -EOPNOTSUPP
, inode
, ctx
, ctxlen
);
1914 EXPORT_SYMBOL(security_inode_getsecctx
);
1916 #ifdef CONFIG_SECURITY_NETWORK
1918 int security_unix_stream_connect(struct sock
*sock
, struct sock
*other
, struct sock
*newsk
)
1920 return call_int_hook(unix_stream_connect
, 0, sock
, other
, newsk
);
1922 EXPORT_SYMBOL(security_unix_stream_connect
);
1924 int security_unix_may_send(struct socket
*sock
, struct socket
*other
)
1926 return call_int_hook(unix_may_send
, 0, sock
, other
);
1928 EXPORT_SYMBOL(security_unix_may_send
);
1930 int security_socket_create(int family
, int type
, int protocol
, int kern
)
1932 return call_int_hook(socket_create
, 0, family
, type
, protocol
, kern
);
1935 int security_socket_post_create(struct socket
*sock
, int family
,
1936 int type
, int protocol
, int kern
)
1938 return call_int_hook(socket_post_create
, 0, sock
, family
, type
,
1942 int security_socket_socketpair(struct socket
*socka
, struct socket
*sockb
)
1944 return call_int_hook(socket_socketpair
, 0, socka
, sockb
);
1946 EXPORT_SYMBOL(security_socket_socketpair
);
1948 int security_socket_bind(struct socket
*sock
, struct sockaddr
*address
, int addrlen
)
1950 return call_int_hook(socket_bind
, 0, sock
, address
, addrlen
);
1953 int security_socket_connect(struct socket
*sock
, struct sockaddr
*address
, int addrlen
)
1955 return call_int_hook(socket_connect
, 0, sock
, address
, addrlen
);
1958 int security_socket_listen(struct socket
*sock
, int backlog
)
1960 return call_int_hook(socket_listen
, 0, sock
, backlog
);
1963 int security_socket_accept(struct socket
*sock
, struct socket
*newsock
)
1965 return call_int_hook(socket_accept
, 0, sock
, newsock
);
1968 int security_socket_sendmsg(struct socket
*sock
, struct msghdr
*msg
, int size
)
1970 return call_int_hook(socket_sendmsg
, 0, sock
, msg
, size
);
1973 int security_socket_recvmsg(struct socket
*sock
, struct msghdr
*msg
,
1974 int size
, int flags
)
1976 return call_int_hook(socket_recvmsg
, 0, sock
, msg
, size
, flags
);
1979 int security_socket_getsockname(struct socket
*sock
)
1981 return call_int_hook(socket_getsockname
, 0, sock
);
1984 int security_socket_getpeername(struct socket
*sock
)
1986 return call_int_hook(socket_getpeername
, 0, sock
);
1989 int security_socket_getsockopt(struct socket
*sock
, int level
, int optname
)
1991 return call_int_hook(socket_getsockopt
, 0, sock
, level
, optname
);
1994 int security_socket_setsockopt(struct socket
*sock
, int level
, int optname
)
1996 return call_int_hook(socket_setsockopt
, 0, sock
, level
, optname
);
1999 int security_socket_shutdown(struct socket
*sock
, int how
)
2001 return call_int_hook(socket_shutdown
, 0, sock
, how
);
2004 int security_sock_rcv_skb(struct sock
*sk
, struct sk_buff
*skb
)
2006 return call_int_hook(socket_sock_rcv_skb
, 0, sk
, skb
);
2008 EXPORT_SYMBOL(security_sock_rcv_skb
);
2010 int security_socket_getpeersec_stream(struct socket
*sock
, char __user
*optval
,
2011 int __user
*optlen
, unsigned len
)
2013 return call_int_hook(socket_getpeersec_stream
, -ENOPROTOOPT
, sock
,
2014 optval
, optlen
, len
);
2017 int security_socket_getpeersec_dgram(struct socket
*sock
, struct sk_buff
*skb
, u32
*secid
)
2019 return call_int_hook(socket_getpeersec_dgram
, -ENOPROTOOPT
, sock
,
2022 EXPORT_SYMBOL(security_socket_getpeersec_dgram
);
2024 int security_sk_alloc(struct sock
*sk
, int family
, gfp_t priority
)
2026 return call_int_hook(sk_alloc_security
, 0, sk
, family
, priority
);
2029 void security_sk_free(struct sock
*sk
)
2031 call_void_hook(sk_free_security
, sk
);
2034 void security_sk_clone(const struct sock
*sk
, struct sock
*newsk
)
2036 call_void_hook(sk_clone_security
, sk
, newsk
);
2038 EXPORT_SYMBOL(security_sk_clone
);
2040 void security_sk_classify_flow(struct sock
*sk
, struct flowi
*fl
)
2042 call_void_hook(sk_getsecid
, sk
, &fl
->flowi_secid
);
2044 EXPORT_SYMBOL(security_sk_classify_flow
);
2046 void security_req_classify_flow(const struct request_sock
*req
, struct flowi
*fl
)
2048 call_void_hook(req_classify_flow
, req
, fl
);
2050 EXPORT_SYMBOL(security_req_classify_flow
);
2052 void security_sock_graft(struct sock
*sk
, struct socket
*parent
)
2054 call_void_hook(sock_graft
, sk
, parent
);
2056 EXPORT_SYMBOL(security_sock_graft
);
2058 int security_inet_conn_request(struct sock
*sk
,
2059 struct sk_buff
*skb
, struct request_sock
*req
)
2061 return call_int_hook(inet_conn_request
, 0, sk
, skb
, req
);
2063 EXPORT_SYMBOL(security_inet_conn_request
);
2065 void security_inet_csk_clone(struct sock
*newsk
,
2066 const struct request_sock
*req
)
2068 call_void_hook(inet_csk_clone
, newsk
, req
);
2071 void security_inet_conn_established(struct sock
*sk
,
2072 struct sk_buff
*skb
)
2074 call_void_hook(inet_conn_established
, sk
, skb
);
2076 EXPORT_SYMBOL(security_inet_conn_established
);
2078 int security_secmark_relabel_packet(u32 secid
)
2080 return call_int_hook(secmark_relabel_packet
, 0, secid
);
2082 EXPORT_SYMBOL(security_secmark_relabel_packet
);
2084 void security_secmark_refcount_inc(void)
2086 call_void_hook(secmark_refcount_inc
);
2088 EXPORT_SYMBOL(security_secmark_refcount_inc
);
2090 void security_secmark_refcount_dec(void)
2092 call_void_hook(secmark_refcount_dec
);
2094 EXPORT_SYMBOL(security_secmark_refcount_dec
);
2096 int security_tun_dev_alloc_security(void **security
)
2098 return call_int_hook(tun_dev_alloc_security
, 0, security
);
2100 EXPORT_SYMBOL(security_tun_dev_alloc_security
);
2102 void security_tun_dev_free_security(void *security
)
2104 call_void_hook(tun_dev_free_security
, security
);
2106 EXPORT_SYMBOL(security_tun_dev_free_security
);
2108 int security_tun_dev_create(void)
2110 return call_int_hook(tun_dev_create
, 0);
2112 EXPORT_SYMBOL(security_tun_dev_create
);
2114 int security_tun_dev_attach_queue(void *security
)
2116 return call_int_hook(tun_dev_attach_queue
, 0, security
);
2118 EXPORT_SYMBOL(security_tun_dev_attach_queue
);
2120 int security_tun_dev_attach(struct sock
*sk
, void *security
)
2122 return call_int_hook(tun_dev_attach
, 0, sk
, security
);
2124 EXPORT_SYMBOL(security_tun_dev_attach
);
2126 int security_tun_dev_open(void *security
)
2128 return call_int_hook(tun_dev_open
, 0, security
);
2130 EXPORT_SYMBOL(security_tun_dev_open
);
2132 int security_sctp_assoc_request(struct sctp_endpoint
*ep
, struct sk_buff
*skb
)
2134 return call_int_hook(sctp_assoc_request
, 0, ep
, skb
);
2136 EXPORT_SYMBOL(security_sctp_assoc_request
);
2138 int security_sctp_bind_connect(struct sock
*sk
, int optname
,
2139 struct sockaddr
*address
, int addrlen
)
2141 return call_int_hook(sctp_bind_connect
, 0, sk
, optname
,
2144 EXPORT_SYMBOL(security_sctp_bind_connect
);
2146 void security_sctp_sk_clone(struct sctp_endpoint
*ep
, struct sock
*sk
,
2149 call_void_hook(sctp_sk_clone
, ep
, sk
, newsk
);
2151 EXPORT_SYMBOL(security_sctp_sk_clone
);
2153 #endif /* CONFIG_SECURITY_NETWORK */
2155 #ifdef CONFIG_SECURITY_INFINIBAND
2157 int security_ib_pkey_access(void *sec
, u64 subnet_prefix
, u16 pkey
)
2159 return call_int_hook(ib_pkey_access
, 0, sec
, subnet_prefix
, pkey
);
2161 EXPORT_SYMBOL(security_ib_pkey_access
);
2163 int security_ib_endport_manage_subnet(void *sec
, const char *dev_name
, u8 port_num
)
2165 return call_int_hook(ib_endport_manage_subnet
, 0, sec
, dev_name
, port_num
);
2167 EXPORT_SYMBOL(security_ib_endport_manage_subnet
);
2169 int security_ib_alloc_security(void **sec
)
2171 return call_int_hook(ib_alloc_security
, 0, sec
);
2173 EXPORT_SYMBOL(security_ib_alloc_security
);
2175 void security_ib_free_security(void *sec
)
2177 call_void_hook(ib_free_security
, sec
);
2179 EXPORT_SYMBOL(security_ib_free_security
);
2180 #endif /* CONFIG_SECURITY_INFINIBAND */
2182 #ifdef CONFIG_SECURITY_NETWORK_XFRM
2184 int security_xfrm_policy_alloc(struct xfrm_sec_ctx
**ctxp
,
2185 struct xfrm_user_sec_ctx
*sec_ctx
,
2188 return call_int_hook(xfrm_policy_alloc_security
, 0, ctxp
, sec_ctx
, gfp
);
2190 EXPORT_SYMBOL(security_xfrm_policy_alloc
);
2192 int security_xfrm_policy_clone(struct xfrm_sec_ctx
*old_ctx
,
2193 struct xfrm_sec_ctx
**new_ctxp
)
2195 return call_int_hook(xfrm_policy_clone_security
, 0, old_ctx
, new_ctxp
);
2198 void security_xfrm_policy_free(struct xfrm_sec_ctx
*ctx
)
2200 call_void_hook(xfrm_policy_free_security
, ctx
);
2202 EXPORT_SYMBOL(security_xfrm_policy_free
);
2204 int security_xfrm_policy_delete(struct xfrm_sec_ctx
*ctx
)
2206 return call_int_hook(xfrm_policy_delete_security
, 0, ctx
);
2209 int security_xfrm_state_alloc(struct xfrm_state
*x
,
2210 struct xfrm_user_sec_ctx
*sec_ctx
)
2212 return call_int_hook(xfrm_state_alloc
, 0, x
, sec_ctx
);
2214 EXPORT_SYMBOL(security_xfrm_state_alloc
);
2216 int security_xfrm_state_alloc_acquire(struct xfrm_state
*x
,
2217 struct xfrm_sec_ctx
*polsec
, u32 secid
)
2219 return call_int_hook(xfrm_state_alloc_acquire
, 0, x
, polsec
, secid
);
2222 int security_xfrm_state_delete(struct xfrm_state
*x
)
2224 return call_int_hook(xfrm_state_delete_security
, 0, x
);
2226 EXPORT_SYMBOL(security_xfrm_state_delete
);
2228 void security_xfrm_state_free(struct xfrm_state
*x
)
2230 call_void_hook(xfrm_state_free_security
, x
);
2233 int security_xfrm_policy_lookup(struct xfrm_sec_ctx
*ctx
, u32 fl_secid
, u8 dir
)
2235 return call_int_hook(xfrm_policy_lookup
, 0, ctx
, fl_secid
, dir
);
2238 int security_xfrm_state_pol_flow_match(struct xfrm_state
*x
,
2239 struct xfrm_policy
*xp
,
2240 const struct flowi
*fl
)
2242 struct security_hook_list
*hp
;
2246 * Since this function is expected to return 0 or 1, the judgment
2247 * becomes difficult if multiple LSMs supply this call. Fortunately,
2248 * we can use the first LSM's judgment because currently only SELinux
2249 * supplies this call.
2251 * For speed optimization, we explicitly break the loop rather than
2254 hlist_for_each_entry(hp
, &security_hook_heads
.xfrm_state_pol_flow_match
,
2256 rc
= hp
->hook
.xfrm_state_pol_flow_match(x
, xp
, fl
);
2262 int security_xfrm_decode_session(struct sk_buff
*skb
, u32
*secid
)
2264 return call_int_hook(xfrm_decode_session
, 0, skb
, secid
, 1);
2267 void security_skb_classify_flow(struct sk_buff
*skb
, struct flowi
*fl
)
2269 int rc
= call_int_hook(xfrm_decode_session
, 0, skb
, &fl
->flowi_secid
,
2274 EXPORT_SYMBOL(security_skb_classify_flow
);
2276 #endif /* CONFIG_SECURITY_NETWORK_XFRM */
2280 int security_key_alloc(struct key
*key
, const struct cred
*cred
,
2281 unsigned long flags
)
2283 return call_int_hook(key_alloc
, 0, key
, cred
, flags
);
2286 void security_key_free(struct key
*key
)
2288 call_void_hook(key_free
, key
);
2291 int security_key_permission(key_ref_t key_ref
,
2292 const struct cred
*cred
, unsigned perm
)
2294 return call_int_hook(key_permission
, 0, key_ref
, cred
, perm
);
2297 int security_key_getsecurity(struct key
*key
, char **_buffer
)
2300 return call_int_hook(key_getsecurity
, 0, key
, _buffer
);
2303 #endif /* CONFIG_KEYS */
2307 int security_audit_rule_init(u32 field
, u32 op
, char *rulestr
, void **lsmrule
)
2309 return call_int_hook(audit_rule_init
, 0, field
, op
, rulestr
, lsmrule
);
2312 int security_audit_rule_known(struct audit_krule
*krule
)
2314 return call_int_hook(audit_rule_known
, 0, krule
);
2317 void security_audit_rule_free(void *lsmrule
)
2319 call_void_hook(audit_rule_free
, lsmrule
);
2322 int security_audit_rule_match(u32 secid
, u32 field
, u32 op
, void *lsmrule
)
2324 return call_int_hook(audit_rule_match
, 0, secid
, field
, op
, lsmrule
);
2326 #endif /* CONFIG_AUDIT */
2328 #ifdef CONFIG_BPF_SYSCALL
2329 int security_bpf(int cmd
, union bpf_attr
*attr
, unsigned int size
)
2331 return call_int_hook(bpf
, 0, cmd
, attr
, size
);
2333 int security_bpf_map(struct bpf_map
*map
, fmode_t fmode
)
2335 return call_int_hook(bpf_map
, 0, map
, fmode
);
2337 int security_bpf_prog(struct bpf_prog
*prog
)
2339 return call_int_hook(bpf_prog
, 0, prog
);
2341 int security_bpf_map_alloc(struct bpf_map
*map
)
2343 return call_int_hook(bpf_map_alloc_security
, 0, map
);
2345 int security_bpf_prog_alloc(struct bpf_prog_aux
*aux
)
2347 return call_int_hook(bpf_prog_alloc_security
, 0, aux
);
2349 void security_bpf_map_free(struct bpf_map
*map
)
2351 call_void_hook(bpf_map_free_security
, map
);
2353 void security_bpf_prog_free(struct bpf_prog_aux
*aux
)
2355 call_void_hook(bpf_prog_free_security
, aux
);
2357 #endif /* CONFIG_BPF_SYSCALL */