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_fs_context_dup(struct fs_context
*fc
, struct fs_context
*src_fc
)
769 return call_int_hook(fs_context_dup
, 0, fc
, src_fc
);
772 int security_fs_context_parse_param(struct fs_context
*fc
, struct fs_parameter
*param
)
774 return call_int_hook(fs_context_parse_param
, -ENOPARAM
, fc
, param
);
777 int security_sb_alloc(struct super_block
*sb
)
779 return call_int_hook(sb_alloc_security
, 0, sb
);
782 void security_sb_free(struct super_block
*sb
)
784 call_void_hook(sb_free_security
, sb
);
787 void security_free_mnt_opts(void **mnt_opts
)
791 call_void_hook(sb_free_mnt_opts
, *mnt_opts
);
794 EXPORT_SYMBOL(security_free_mnt_opts
);
796 int security_sb_eat_lsm_opts(char *options
, void **mnt_opts
)
798 return call_int_hook(sb_eat_lsm_opts
, 0, options
, mnt_opts
);
800 EXPORT_SYMBOL(security_sb_eat_lsm_opts
);
802 int security_sb_remount(struct super_block
*sb
,
805 return call_int_hook(sb_remount
, 0, sb
, mnt_opts
);
807 EXPORT_SYMBOL(security_sb_remount
);
809 int security_sb_kern_mount(struct super_block
*sb
)
811 return call_int_hook(sb_kern_mount
, 0, sb
);
814 int security_sb_show_options(struct seq_file
*m
, struct super_block
*sb
)
816 return call_int_hook(sb_show_options
, 0, m
, sb
);
819 int security_sb_statfs(struct dentry
*dentry
)
821 return call_int_hook(sb_statfs
, 0, dentry
);
824 int security_sb_mount(const char *dev_name
, const struct path
*path
,
825 const char *type
, unsigned long flags
, void *data
)
827 return call_int_hook(sb_mount
, 0, dev_name
, path
, type
, flags
, data
);
830 int security_sb_umount(struct vfsmount
*mnt
, int flags
)
832 return call_int_hook(sb_umount
, 0, mnt
, flags
);
835 int security_sb_pivotroot(const struct path
*old_path
, const struct path
*new_path
)
837 return call_int_hook(sb_pivotroot
, 0, old_path
, new_path
);
840 int security_sb_set_mnt_opts(struct super_block
*sb
,
842 unsigned long kern_flags
,
843 unsigned long *set_kern_flags
)
845 return call_int_hook(sb_set_mnt_opts
,
846 mnt_opts
? -EOPNOTSUPP
: 0, sb
,
847 mnt_opts
, kern_flags
, set_kern_flags
);
849 EXPORT_SYMBOL(security_sb_set_mnt_opts
);
851 int security_sb_clone_mnt_opts(const struct super_block
*oldsb
,
852 struct super_block
*newsb
,
853 unsigned long kern_flags
,
854 unsigned long *set_kern_flags
)
856 return call_int_hook(sb_clone_mnt_opts
, 0, oldsb
, newsb
,
857 kern_flags
, set_kern_flags
);
859 EXPORT_SYMBOL(security_sb_clone_mnt_opts
);
861 int security_add_mnt_opt(const char *option
, const char *val
, int len
,
864 return call_int_hook(sb_add_mnt_opt
, -EINVAL
,
865 option
, val
, len
, mnt_opts
);
867 EXPORT_SYMBOL(security_add_mnt_opt
);
869 int security_inode_alloc(struct inode
*inode
)
871 int rc
= lsm_inode_alloc(inode
);
875 rc
= call_int_hook(inode_alloc_security
, 0, inode
);
877 security_inode_free(inode
);
881 static void inode_free_by_rcu(struct rcu_head
*head
)
884 * The rcu head is at the start of the inode blob
886 kmem_cache_free(lsm_inode_cache
, head
);
889 void security_inode_free(struct inode
*inode
)
891 integrity_inode_free(inode
);
892 call_void_hook(inode_free_security
, inode
);
894 * The inode may still be referenced in a path walk and
895 * a call to security_inode_permission() can be made
896 * after inode_free_security() is called. Ideally, the VFS
897 * wouldn't do this, but fixing that is a much harder
898 * job. For now, simply free the i_security via RCU, and
899 * leave the current inode->i_security pointer intact.
900 * The inode will be freed after the RCU grace period too.
902 if (inode
->i_security
)
903 call_rcu((struct rcu_head
*)inode
->i_security
,
907 int security_dentry_init_security(struct dentry
*dentry
, int mode
,
908 const struct qstr
*name
, void **ctx
,
911 return call_int_hook(dentry_init_security
, -EOPNOTSUPP
, dentry
, mode
,
914 EXPORT_SYMBOL(security_dentry_init_security
);
916 int security_dentry_create_files_as(struct dentry
*dentry
, int mode
,
918 const struct cred
*old
, struct cred
*new)
920 return call_int_hook(dentry_create_files_as
, 0, dentry
, mode
,
923 EXPORT_SYMBOL(security_dentry_create_files_as
);
925 int security_inode_init_security(struct inode
*inode
, struct inode
*dir
,
926 const struct qstr
*qstr
,
927 const initxattrs initxattrs
, void *fs_data
)
929 struct xattr new_xattrs
[MAX_LSM_EVM_XATTR
+ 1];
930 struct xattr
*lsm_xattr
, *evm_xattr
, *xattr
;
933 if (unlikely(IS_PRIVATE(inode
)))
937 return call_int_hook(inode_init_security
, -EOPNOTSUPP
, inode
,
938 dir
, qstr
, NULL
, NULL
, NULL
);
939 memset(new_xattrs
, 0, sizeof(new_xattrs
));
940 lsm_xattr
= new_xattrs
;
941 ret
= call_int_hook(inode_init_security
, -EOPNOTSUPP
, inode
, dir
, qstr
,
944 &lsm_xattr
->value_len
);
948 evm_xattr
= lsm_xattr
+ 1;
949 ret
= evm_inode_init_security(inode
, lsm_xattr
, evm_xattr
);
952 ret
= initxattrs(inode
, new_xattrs
, fs_data
);
954 for (xattr
= new_xattrs
; xattr
->value
!= NULL
; xattr
++)
956 return (ret
== -EOPNOTSUPP
) ? 0 : ret
;
958 EXPORT_SYMBOL(security_inode_init_security
);
960 int security_old_inode_init_security(struct inode
*inode
, struct inode
*dir
,
961 const struct qstr
*qstr
, const char **name
,
962 void **value
, size_t *len
)
964 if (unlikely(IS_PRIVATE(inode
)))
966 return call_int_hook(inode_init_security
, -EOPNOTSUPP
, inode
, dir
,
967 qstr
, name
, value
, len
);
969 EXPORT_SYMBOL(security_old_inode_init_security
);
971 #ifdef CONFIG_SECURITY_PATH
972 int security_path_mknod(const struct path
*dir
, struct dentry
*dentry
, umode_t mode
,
975 if (unlikely(IS_PRIVATE(d_backing_inode(dir
->dentry
))))
977 return call_int_hook(path_mknod
, 0, dir
, dentry
, mode
, dev
);
979 EXPORT_SYMBOL(security_path_mknod
);
981 int security_path_mkdir(const struct path
*dir
, struct dentry
*dentry
, umode_t mode
)
983 if (unlikely(IS_PRIVATE(d_backing_inode(dir
->dentry
))))
985 return call_int_hook(path_mkdir
, 0, dir
, dentry
, mode
);
987 EXPORT_SYMBOL(security_path_mkdir
);
989 int security_path_rmdir(const struct path
*dir
, struct dentry
*dentry
)
991 if (unlikely(IS_PRIVATE(d_backing_inode(dir
->dentry
))))
993 return call_int_hook(path_rmdir
, 0, dir
, dentry
);
996 int security_path_unlink(const struct path
*dir
, struct dentry
*dentry
)
998 if (unlikely(IS_PRIVATE(d_backing_inode(dir
->dentry
))))
1000 return call_int_hook(path_unlink
, 0, dir
, dentry
);
1002 EXPORT_SYMBOL(security_path_unlink
);
1004 int security_path_symlink(const struct path
*dir
, struct dentry
*dentry
,
1005 const char *old_name
)
1007 if (unlikely(IS_PRIVATE(d_backing_inode(dir
->dentry
))))
1009 return call_int_hook(path_symlink
, 0, dir
, dentry
, old_name
);
1012 int security_path_link(struct dentry
*old_dentry
, const struct path
*new_dir
,
1013 struct dentry
*new_dentry
)
1015 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry
))))
1017 return call_int_hook(path_link
, 0, old_dentry
, new_dir
, new_dentry
);
1020 int security_path_rename(const struct path
*old_dir
, struct dentry
*old_dentry
,
1021 const struct path
*new_dir
, struct dentry
*new_dentry
,
1024 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry
)) ||
1025 (d_is_positive(new_dentry
) && IS_PRIVATE(d_backing_inode(new_dentry
)))))
1028 if (flags
& RENAME_EXCHANGE
) {
1029 int err
= call_int_hook(path_rename
, 0, new_dir
, new_dentry
,
1030 old_dir
, old_dentry
);
1035 return call_int_hook(path_rename
, 0, old_dir
, old_dentry
, new_dir
,
1038 EXPORT_SYMBOL(security_path_rename
);
1040 int security_path_truncate(const struct path
*path
)
1042 if (unlikely(IS_PRIVATE(d_backing_inode(path
->dentry
))))
1044 return call_int_hook(path_truncate
, 0, path
);
1047 int security_path_chmod(const struct path
*path
, umode_t mode
)
1049 if (unlikely(IS_PRIVATE(d_backing_inode(path
->dentry
))))
1051 return call_int_hook(path_chmod
, 0, path
, mode
);
1054 int security_path_chown(const struct path
*path
, kuid_t uid
, kgid_t gid
)
1056 if (unlikely(IS_PRIVATE(d_backing_inode(path
->dentry
))))
1058 return call_int_hook(path_chown
, 0, path
, uid
, gid
);
1061 int security_path_chroot(const struct path
*path
)
1063 return call_int_hook(path_chroot
, 0, path
);
1067 int security_inode_create(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
)
1069 if (unlikely(IS_PRIVATE(dir
)))
1071 return call_int_hook(inode_create
, 0, dir
, dentry
, mode
);
1073 EXPORT_SYMBOL_GPL(security_inode_create
);
1075 int security_inode_link(struct dentry
*old_dentry
, struct inode
*dir
,
1076 struct dentry
*new_dentry
)
1078 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry
))))
1080 return call_int_hook(inode_link
, 0, old_dentry
, dir
, new_dentry
);
1083 int security_inode_unlink(struct inode
*dir
, struct dentry
*dentry
)
1085 if (unlikely(IS_PRIVATE(d_backing_inode(dentry
))))
1087 return call_int_hook(inode_unlink
, 0, dir
, dentry
);
1090 int security_inode_symlink(struct inode
*dir
, struct dentry
*dentry
,
1091 const char *old_name
)
1093 if (unlikely(IS_PRIVATE(dir
)))
1095 return call_int_hook(inode_symlink
, 0, dir
, dentry
, old_name
);
1098 int security_inode_mkdir(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
)
1100 if (unlikely(IS_PRIVATE(dir
)))
1102 return call_int_hook(inode_mkdir
, 0, dir
, dentry
, mode
);
1104 EXPORT_SYMBOL_GPL(security_inode_mkdir
);
1106 int security_inode_rmdir(struct inode
*dir
, struct dentry
*dentry
)
1108 if (unlikely(IS_PRIVATE(d_backing_inode(dentry
))))
1110 return call_int_hook(inode_rmdir
, 0, dir
, dentry
);
1113 int security_inode_mknod(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
, dev_t dev
)
1115 if (unlikely(IS_PRIVATE(dir
)))
1117 return call_int_hook(inode_mknod
, 0, dir
, dentry
, mode
, dev
);
1120 int security_inode_rename(struct inode
*old_dir
, struct dentry
*old_dentry
,
1121 struct inode
*new_dir
, struct dentry
*new_dentry
,
1124 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry
)) ||
1125 (d_is_positive(new_dentry
) && IS_PRIVATE(d_backing_inode(new_dentry
)))))
1128 if (flags
& RENAME_EXCHANGE
) {
1129 int err
= call_int_hook(inode_rename
, 0, new_dir
, new_dentry
,
1130 old_dir
, old_dentry
);
1135 return call_int_hook(inode_rename
, 0, old_dir
, old_dentry
,
1136 new_dir
, new_dentry
);
1139 int security_inode_readlink(struct dentry
*dentry
)
1141 if (unlikely(IS_PRIVATE(d_backing_inode(dentry
))))
1143 return call_int_hook(inode_readlink
, 0, dentry
);
1146 int security_inode_follow_link(struct dentry
*dentry
, struct inode
*inode
,
1149 if (unlikely(IS_PRIVATE(inode
)))
1151 return call_int_hook(inode_follow_link
, 0, dentry
, inode
, rcu
);
1154 int security_inode_permission(struct inode
*inode
, int mask
)
1156 if (unlikely(IS_PRIVATE(inode
)))
1158 return call_int_hook(inode_permission
, 0, inode
, mask
);
1161 int security_inode_setattr(struct dentry
*dentry
, struct iattr
*attr
)
1165 if (unlikely(IS_PRIVATE(d_backing_inode(dentry
))))
1167 ret
= call_int_hook(inode_setattr
, 0, dentry
, attr
);
1170 return evm_inode_setattr(dentry
, attr
);
1172 EXPORT_SYMBOL_GPL(security_inode_setattr
);
1174 int security_inode_getattr(const struct path
*path
)
1176 if (unlikely(IS_PRIVATE(d_backing_inode(path
->dentry
))))
1178 return call_int_hook(inode_getattr
, 0, path
);
1181 int security_inode_setxattr(struct dentry
*dentry
, const char *name
,
1182 const void *value
, size_t size
, int flags
)
1186 if (unlikely(IS_PRIVATE(d_backing_inode(dentry
))))
1189 * SELinux and Smack integrate the cap call,
1190 * so assume that all LSMs supplying this call do so.
1192 ret
= call_int_hook(inode_setxattr
, 1, dentry
, name
, value
, size
,
1196 ret
= cap_inode_setxattr(dentry
, name
, value
, size
, flags
);
1199 ret
= ima_inode_setxattr(dentry
, name
, value
, size
);
1202 return evm_inode_setxattr(dentry
, name
, value
, size
);
1205 void security_inode_post_setxattr(struct dentry
*dentry
, const char *name
,
1206 const void *value
, size_t size
, int flags
)
1208 if (unlikely(IS_PRIVATE(d_backing_inode(dentry
))))
1210 call_void_hook(inode_post_setxattr
, dentry
, name
, value
, size
, flags
);
1211 evm_inode_post_setxattr(dentry
, name
, value
, size
);
1214 int security_inode_getxattr(struct dentry
*dentry
, const char *name
)
1216 if (unlikely(IS_PRIVATE(d_backing_inode(dentry
))))
1218 return call_int_hook(inode_getxattr
, 0, dentry
, name
);
1221 int security_inode_listxattr(struct dentry
*dentry
)
1223 if (unlikely(IS_PRIVATE(d_backing_inode(dentry
))))
1225 return call_int_hook(inode_listxattr
, 0, dentry
);
1228 int security_inode_removexattr(struct dentry
*dentry
, const char *name
)
1232 if (unlikely(IS_PRIVATE(d_backing_inode(dentry
))))
1235 * SELinux and Smack integrate the cap call,
1236 * so assume that all LSMs supplying this call do so.
1238 ret
= call_int_hook(inode_removexattr
, 1, dentry
, name
);
1240 ret
= cap_inode_removexattr(dentry
, name
);
1243 ret
= ima_inode_removexattr(dentry
, name
);
1246 return evm_inode_removexattr(dentry
, name
);
1249 int security_inode_need_killpriv(struct dentry
*dentry
)
1251 return call_int_hook(inode_need_killpriv
, 0, dentry
);
1254 int security_inode_killpriv(struct dentry
*dentry
)
1256 return call_int_hook(inode_killpriv
, 0, dentry
);
1259 int security_inode_getsecurity(struct inode
*inode
, const char *name
, void **buffer
, bool alloc
)
1261 struct security_hook_list
*hp
;
1264 if (unlikely(IS_PRIVATE(inode
)))
1267 * Only one module will provide an attribute with a given name.
1269 hlist_for_each_entry(hp
, &security_hook_heads
.inode_getsecurity
, list
) {
1270 rc
= hp
->hook
.inode_getsecurity(inode
, name
, buffer
, alloc
);
1271 if (rc
!= -EOPNOTSUPP
)
1277 int security_inode_setsecurity(struct inode
*inode
, const char *name
, const void *value
, size_t size
, int flags
)
1279 struct security_hook_list
*hp
;
1282 if (unlikely(IS_PRIVATE(inode
)))
1285 * Only one module will provide an attribute with a given name.
1287 hlist_for_each_entry(hp
, &security_hook_heads
.inode_setsecurity
, list
) {
1288 rc
= hp
->hook
.inode_setsecurity(inode
, name
, value
, size
,
1290 if (rc
!= -EOPNOTSUPP
)
1296 int security_inode_listsecurity(struct inode
*inode
, char *buffer
, size_t buffer_size
)
1298 if (unlikely(IS_PRIVATE(inode
)))
1300 return call_int_hook(inode_listsecurity
, 0, inode
, buffer
, buffer_size
);
1302 EXPORT_SYMBOL(security_inode_listsecurity
);
1304 void security_inode_getsecid(struct inode
*inode
, u32
*secid
)
1306 call_void_hook(inode_getsecid
, inode
, secid
);
1309 int security_inode_copy_up(struct dentry
*src
, struct cred
**new)
1311 return call_int_hook(inode_copy_up
, 0, src
, new);
1313 EXPORT_SYMBOL(security_inode_copy_up
);
1315 int security_inode_copy_up_xattr(const char *name
)
1317 return call_int_hook(inode_copy_up_xattr
, -EOPNOTSUPP
, name
);
1319 EXPORT_SYMBOL(security_inode_copy_up_xattr
);
1321 int security_file_permission(struct file
*file
, int mask
)
1325 ret
= call_int_hook(file_permission
, 0, file
, mask
);
1329 return fsnotify_perm(file
, mask
);
1332 int security_file_alloc(struct file
*file
)
1334 int rc
= lsm_file_alloc(file
);
1338 rc
= call_int_hook(file_alloc_security
, 0, file
);
1340 security_file_free(file
);
1344 void security_file_free(struct file
*file
)
1348 call_void_hook(file_free_security
, file
);
1350 blob
= file
->f_security
;
1352 file
->f_security
= NULL
;
1353 kmem_cache_free(lsm_file_cache
, blob
);
1357 int security_file_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
)
1359 return call_int_hook(file_ioctl
, 0, file
, cmd
, arg
);
1362 static inline unsigned long mmap_prot(struct file
*file
, unsigned long prot
)
1365 * Does we have PROT_READ and does the application expect
1366 * it to imply PROT_EXEC? If not, nothing to talk about...
1368 if ((prot
& (PROT_READ
| PROT_EXEC
)) != PROT_READ
)
1370 if (!(current
->personality
& READ_IMPLIES_EXEC
))
1373 * if that's an anonymous mapping, let it.
1376 return prot
| PROT_EXEC
;
1378 * ditto if it's not on noexec mount, except that on !MMU we need
1379 * NOMMU_MAP_EXEC (== VM_MAYEXEC) in this case
1381 if (!path_noexec(&file
->f_path
)) {
1383 if (file
->f_op
->mmap_capabilities
) {
1384 unsigned caps
= file
->f_op
->mmap_capabilities(file
);
1385 if (!(caps
& NOMMU_MAP_EXEC
))
1389 return prot
| PROT_EXEC
;
1391 /* anything on noexec mount won't get PROT_EXEC */
1395 int security_mmap_file(struct file
*file
, unsigned long prot
,
1396 unsigned long flags
)
1399 ret
= call_int_hook(mmap_file
, 0, file
, prot
,
1400 mmap_prot(file
, prot
), flags
);
1403 return ima_file_mmap(file
, prot
);
1406 int security_mmap_addr(unsigned long addr
)
1408 return call_int_hook(mmap_addr
, 0, addr
);
1411 int security_file_mprotect(struct vm_area_struct
*vma
, unsigned long reqprot
,
1414 return call_int_hook(file_mprotect
, 0, vma
, reqprot
, prot
);
1417 int security_file_lock(struct file
*file
, unsigned int cmd
)
1419 return call_int_hook(file_lock
, 0, file
, cmd
);
1422 int security_file_fcntl(struct file
*file
, unsigned int cmd
, unsigned long arg
)
1424 return call_int_hook(file_fcntl
, 0, file
, cmd
, arg
);
1427 void security_file_set_fowner(struct file
*file
)
1429 call_void_hook(file_set_fowner
, file
);
1432 int security_file_send_sigiotask(struct task_struct
*tsk
,
1433 struct fown_struct
*fown
, int sig
)
1435 return call_int_hook(file_send_sigiotask
, 0, tsk
, fown
, sig
);
1438 int security_file_receive(struct file
*file
)
1440 return call_int_hook(file_receive
, 0, file
);
1443 int security_file_open(struct file
*file
)
1447 ret
= call_int_hook(file_open
, 0, file
);
1451 return fsnotify_perm(file
, MAY_OPEN
);
1454 int security_task_alloc(struct task_struct
*task
, unsigned long clone_flags
)
1456 int rc
= lsm_task_alloc(task
);
1460 rc
= call_int_hook(task_alloc
, 0, task
, clone_flags
);
1462 security_task_free(task
);
1466 void security_task_free(struct task_struct
*task
)
1468 call_void_hook(task_free
, task
);
1470 kfree(task
->security
);
1471 task
->security
= NULL
;
1474 int security_cred_alloc_blank(struct cred
*cred
, gfp_t gfp
)
1476 int rc
= lsm_cred_alloc(cred
, gfp
);
1481 rc
= call_int_hook(cred_alloc_blank
, 0, cred
, gfp
);
1483 security_cred_free(cred
);
1487 void security_cred_free(struct cred
*cred
)
1490 * There is a failure case in prepare_creds() that
1491 * may result in a call here with ->security being NULL.
1493 if (unlikely(cred
->security
== NULL
))
1496 call_void_hook(cred_free
, cred
);
1498 kfree(cred
->security
);
1499 cred
->security
= NULL
;
1502 int security_prepare_creds(struct cred
*new, const struct cred
*old
, gfp_t gfp
)
1504 int rc
= lsm_cred_alloc(new, gfp
);
1509 rc
= call_int_hook(cred_prepare
, 0, new, old
, gfp
);
1511 security_cred_free(new);
1515 void security_transfer_creds(struct cred
*new, const struct cred
*old
)
1517 call_void_hook(cred_transfer
, new, old
);
1520 void security_cred_getsecid(const struct cred
*c
, u32
*secid
)
1523 call_void_hook(cred_getsecid
, c
, secid
);
1525 EXPORT_SYMBOL(security_cred_getsecid
);
1527 int security_kernel_act_as(struct cred
*new, u32 secid
)
1529 return call_int_hook(kernel_act_as
, 0, new, secid
);
1532 int security_kernel_create_files_as(struct cred
*new, struct inode
*inode
)
1534 return call_int_hook(kernel_create_files_as
, 0, new, inode
);
1537 int security_kernel_module_request(char *kmod_name
)
1541 ret
= call_int_hook(kernel_module_request
, 0, kmod_name
);
1544 return integrity_kernel_module_request(kmod_name
);
1547 int security_kernel_read_file(struct file
*file
, enum kernel_read_file_id id
)
1551 ret
= call_int_hook(kernel_read_file
, 0, file
, id
);
1554 return ima_read_file(file
, id
);
1556 EXPORT_SYMBOL_GPL(security_kernel_read_file
);
1558 int security_kernel_post_read_file(struct file
*file
, char *buf
, loff_t size
,
1559 enum kernel_read_file_id id
)
1563 ret
= call_int_hook(kernel_post_read_file
, 0, file
, buf
, size
, id
);
1566 return ima_post_read_file(file
, buf
, size
, id
);
1568 EXPORT_SYMBOL_GPL(security_kernel_post_read_file
);
1570 int security_kernel_load_data(enum kernel_load_data_id id
)
1574 ret
= call_int_hook(kernel_load_data
, 0, id
);
1577 return ima_load_data(id
);
1579 EXPORT_SYMBOL_GPL(security_kernel_load_data
);
1581 int security_task_fix_setuid(struct cred
*new, const struct cred
*old
,
1584 return call_int_hook(task_fix_setuid
, 0, new, old
, flags
);
1587 int security_task_setpgid(struct task_struct
*p
, pid_t pgid
)
1589 return call_int_hook(task_setpgid
, 0, p
, pgid
);
1592 int security_task_getpgid(struct task_struct
*p
)
1594 return call_int_hook(task_getpgid
, 0, p
);
1597 int security_task_getsid(struct task_struct
*p
)
1599 return call_int_hook(task_getsid
, 0, p
);
1602 void security_task_getsecid(struct task_struct
*p
, u32
*secid
)
1605 call_void_hook(task_getsecid
, p
, secid
);
1607 EXPORT_SYMBOL(security_task_getsecid
);
1609 int security_task_setnice(struct task_struct
*p
, int nice
)
1611 return call_int_hook(task_setnice
, 0, p
, nice
);
1614 int security_task_setioprio(struct task_struct
*p
, int ioprio
)
1616 return call_int_hook(task_setioprio
, 0, p
, ioprio
);
1619 int security_task_getioprio(struct task_struct
*p
)
1621 return call_int_hook(task_getioprio
, 0, p
);
1624 int security_task_prlimit(const struct cred
*cred
, const struct cred
*tcred
,
1627 return call_int_hook(task_prlimit
, 0, cred
, tcred
, flags
);
1630 int security_task_setrlimit(struct task_struct
*p
, unsigned int resource
,
1631 struct rlimit
*new_rlim
)
1633 return call_int_hook(task_setrlimit
, 0, p
, resource
, new_rlim
);
1636 int security_task_setscheduler(struct task_struct
*p
)
1638 return call_int_hook(task_setscheduler
, 0, p
);
1641 int security_task_getscheduler(struct task_struct
*p
)
1643 return call_int_hook(task_getscheduler
, 0, p
);
1646 int security_task_movememory(struct task_struct
*p
)
1648 return call_int_hook(task_movememory
, 0, p
);
1651 int security_task_kill(struct task_struct
*p
, struct kernel_siginfo
*info
,
1652 int sig
, const struct cred
*cred
)
1654 return call_int_hook(task_kill
, 0, p
, info
, sig
, cred
);
1657 int security_task_prctl(int option
, unsigned long arg2
, unsigned long arg3
,
1658 unsigned long arg4
, unsigned long arg5
)
1662 struct security_hook_list
*hp
;
1664 hlist_for_each_entry(hp
, &security_hook_heads
.task_prctl
, list
) {
1665 thisrc
= hp
->hook
.task_prctl(option
, arg2
, arg3
, arg4
, arg5
);
1666 if (thisrc
!= -ENOSYS
) {
1675 void security_task_to_inode(struct task_struct
*p
, struct inode
*inode
)
1677 call_void_hook(task_to_inode
, p
, inode
);
1680 int security_ipc_permission(struct kern_ipc_perm
*ipcp
, short flag
)
1682 return call_int_hook(ipc_permission
, 0, ipcp
, flag
);
1685 void security_ipc_getsecid(struct kern_ipc_perm
*ipcp
, u32
*secid
)
1688 call_void_hook(ipc_getsecid
, ipcp
, secid
);
1691 int security_msg_msg_alloc(struct msg_msg
*msg
)
1693 int rc
= lsm_msg_msg_alloc(msg
);
1697 rc
= call_int_hook(msg_msg_alloc_security
, 0, msg
);
1699 security_msg_msg_free(msg
);
1703 void security_msg_msg_free(struct msg_msg
*msg
)
1705 call_void_hook(msg_msg_free_security
, msg
);
1706 kfree(msg
->security
);
1707 msg
->security
= NULL
;
1710 int security_msg_queue_alloc(struct kern_ipc_perm
*msq
)
1712 int rc
= lsm_ipc_alloc(msq
);
1716 rc
= call_int_hook(msg_queue_alloc_security
, 0, msq
);
1718 security_msg_queue_free(msq
);
1722 void security_msg_queue_free(struct kern_ipc_perm
*msq
)
1724 call_void_hook(msg_queue_free_security
, msq
);
1725 kfree(msq
->security
);
1726 msq
->security
= NULL
;
1729 int security_msg_queue_associate(struct kern_ipc_perm
*msq
, int msqflg
)
1731 return call_int_hook(msg_queue_associate
, 0, msq
, msqflg
);
1734 int security_msg_queue_msgctl(struct kern_ipc_perm
*msq
, int cmd
)
1736 return call_int_hook(msg_queue_msgctl
, 0, msq
, cmd
);
1739 int security_msg_queue_msgsnd(struct kern_ipc_perm
*msq
,
1740 struct msg_msg
*msg
, int msqflg
)
1742 return call_int_hook(msg_queue_msgsnd
, 0, msq
, msg
, msqflg
);
1745 int security_msg_queue_msgrcv(struct kern_ipc_perm
*msq
, struct msg_msg
*msg
,
1746 struct task_struct
*target
, long type
, int mode
)
1748 return call_int_hook(msg_queue_msgrcv
, 0, msq
, msg
, target
, type
, mode
);
1751 int security_shm_alloc(struct kern_ipc_perm
*shp
)
1753 int rc
= lsm_ipc_alloc(shp
);
1757 rc
= call_int_hook(shm_alloc_security
, 0, shp
);
1759 security_shm_free(shp
);
1763 void security_shm_free(struct kern_ipc_perm
*shp
)
1765 call_void_hook(shm_free_security
, shp
);
1766 kfree(shp
->security
);
1767 shp
->security
= NULL
;
1770 int security_shm_associate(struct kern_ipc_perm
*shp
, int shmflg
)
1772 return call_int_hook(shm_associate
, 0, shp
, shmflg
);
1775 int security_shm_shmctl(struct kern_ipc_perm
*shp
, int cmd
)
1777 return call_int_hook(shm_shmctl
, 0, shp
, cmd
);
1780 int security_shm_shmat(struct kern_ipc_perm
*shp
, char __user
*shmaddr
, int shmflg
)
1782 return call_int_hook(shm_shmat
, 0, shp
, shmaddr
, shmflg
);
1785 int security_sem_alloc(struct kern_ipc_perm
*sma
)
1787 int rc
= lsm_ipc_alloc(sma
);
1791 rc
= call_int_hook(sem_alloc_security
, 0, sma
);
1793 security_sem_free(sma
);
1797 void security_sem_free(struct kern_ipc_perm
*sma
)
1799 call_void_hook(sem_free_security
, sma
);
1800 kfree(sma
->security
);
1801 sma
->security
= NULL
;
1804 int security_sem_associate(struct kern_ipc_perm
*sma
, int semflg
)
1806 return call_int_hook(sem_associate
, 0, sma
, semflg
);
1809 int security_sem_semctl(struct kern_ipc_perm
*sma
, int cmd
)
1811 return call_int_hook(sem_semctl
, 0, sma
, cmd
);
1814 int security_sem_semop(struct kern_ipc_perm
*sma
, struct sembuf
*sops
,
1815 unsigned nsops
, int alter
)
1817 return call_int_hook(sem_semop
, 0, sma
, sops
, nsops
, alter
);
1820 void security_d_instantiate(struct dentry
*dentry
, struct inode
*inode
)
1822 if (unlikely(inode
&& IS_PRIVATE(inode
)))
1824 call_void_hook(d_instantiate
, dentry
, inode
);
1826 EXPORT_SYMBOL(security_d_instantiate
);
1828 int security_getprocattr(struct task_struct
*p
, const char *lsm
, char *name
,
1831 struct security_hook_list
*hp
;
1833 hlist_for_each_entry(hp
, &security_hook_heads
.getprocattr
, list
) {
1834 if (lsm
!= NULL
&& strcmp(lsm
, hp
->lsm
))
1836 return hp
->hook
.getprocattr(p
, name
, value
);
1841 int security_setprocattr(const char *lsm
, const char *name
, void *value
,
1844 struct security_hook_list
*hp
;
1846 hlist_for_each_entry(hp
, &security_hook_heads
.setprocattr
, list
) {
1847 if (lsm
!= NULL
&& strcmp(lsm
, hp
->lsm
))
1849 return hp
->hook
.setprocattr(name
, value
, size
);
1854 int security_netlink_send(struct sock
*sk
, struct sk_buff
*skb
)
1856 return call_int_hook(netlink_send
, 0, sk
, skb
);
1859 int security_ismaclabel(const char *name
)
1861 return call_int_hook(ismaclabel
, 0, name
);
1863 EXPORT_SYMBOL(security_ismaclabel
);
1865 int security_secid_to_secctx(u32 secid
, char **secdata
, u32
*seclen
)
1867 return call_int_hook(secid_to_secctx
, -EOPNOTSUPP
, secid
, secdata
,
1870 EXPORT_SYMBOL(security_secid_to_secctx
);
1872 int security_secctx_to_secid(const char *secdata
, u32 seclen
, u32
*secid
)
1875 return call_int_hook(secctx_to_secid
, 0, secdata
, seclen
, secid
);
1877 EXPORT_SYMBOL(security_secctx_to_secid
);
1879 void security_release_secctx(char *secdata
, u32 seclen
)
1881 call_void_hook(release_secctx
, secdata
, seclen
);
1883 EXPORT_SYMBOL(security_release_secctx
);
1885 void security_inode_invalidate_secctx(struct inode
*inode
)
1887 call_void_hook(inode_invalidate_secctx
, inode
);
1889 EXPORT_SYMBOL(security_inode_invalidate_secctx
);
1891 int security_inode_notifysecctx(struct inode
*inode
, void *ctx
, u32 ctxlen
)
1893 return call_int_hook(inode_notifysecctx
, 0, inode
, ctx
, ctxlen
);
1895 EXPORT_SYMBOL(security_inode_notifysecctx
);
1897 int security_inode_setsecctx(struct dentry
*dentry
, void *ctx
, u32 ctxlen
)
1899 return call_int_hook(inode_setsecctx
, 0, dentry
, ctx
, ctxlen
);
1901 EXPORT_SYMBOL(security_inode_setsecctx
);
1903 int security_inode_getsecctx(struct inode
*inode
, void **ctx
, u32
*ctxlen
)
1905 return call_int_hook(inode_getsecctx
, -EOPNOTSUPP
, inode
, ctx
, ctxlen
);
1907 EXPORT_SYMBOL(security_inode_getsecctx
);
1909 #ifdef CONFIG_SECURITY_NETWORK
1911 int security_unix_stream_connect(struct sock
*sock
, struct sock
*other
, struct sock
*newsk
)
1913 return call_int_hook(unix_stream_connect
, 0, sock
, other
, newsk
);
1915 EXPORT_SYMBOL(security_unix_stream_connect
);
1917 int security_unix_may_send(struct socket
*sock
, struct socket
*other
)
1919 return call_int_hook(unix_may_send
, 0, sock
, other
);
1921 EXPORT_SYMBOL(security_unix_may_send
);
1923 int security_socket_create(int family
, int type
, int protocol
, int kern
)
1925 return call_int_hook(socket_create
, 0, family
, type
, protocol
, kern
);
1928 int security_socket_post_create(struct socket
*sock
, int family
,
1929 int type
, int protocol
, int kern
)
1931 return call_int_hook(socket_post_create
, 0, sock
, family
, type
,
1935 int security_socket_socketpair(struct socket
*socka
, struct socket
*sockb
)
1937 return call_int_hook(socket_socketpair
, 0, socka
, sockb
);
1939 EXPORT_SYMBOL(security_socket_socketpair
);
1941 int security_socket_bind(struct socket
*sock
, struct sockaddr
*address
, int addrlen
)
1943 return call_int_hook(socket_bind
, 0, sock
, address
, addrlen
);
1946 int security_socket_connect(struct socket
*sock
, struct sockaddr
*address
, int addrlen
)
1948 return call_int_hook(socket_connect
, 0, sock
, address
, addrlen
);
1951 int security_socket_listen(struct socket
*sock
, int backlog
)
1953 return call_int_hook(socket_listen
, 0, sock
, backlog
);
1956 int security_socket_accept(struct socket
*sock
, struct socket
*newsock
)
1958 return call_int_hook(socket_accept
, 0, sock
, newsock
);
1961 int security_socket_sendmsg(struct socket
*sock
, struct msghdr
*msg
, int size
)
1963 return call_int_hook(socket_sendmsg
, 0, sock
, msg
, size
);
1966 int security_socket_recvmsg(struct socket
*sock
, struct msghdr
*msg
,
1967 int size
, int flags
)
1969 return call_int_hook(socket_recvmsg
, 0, sock
, msg
, size
, flags
);
1972 int security_socket_getsockname(struct socket
*sock
)
1974 return call_int_hook(socket_getsockname
, 0, sock
);
1977 int security_socket_getpeername(struct socket
*sock
)
1979 return call_int_hook(socket_getpeername
, 0, sock
);
1982 int security_socket_getsockopt(struct socket
*sock
, int level
, int optname
)
1984 return call_int_hook(socket_getsockopt
, 0, sock
, level
, optname
);
1987 int security_socket_setsockopt(struct socket
*sock
, int level
, int optname
)
1989 return call_int_hook(socket_setsockopt
, 0, sock
, level
, optname
);
1992 int security_socket_shutdown(struct socket
*sock
, int how
)
1994 return call_int_hook(socket_shutdown
, 0, sock
, how
);
1997 int security_sock_rcv_skb(struct sock
*sk
, struct sk_buff
*skb
)
1999 return call_int_hook(socket_sock_rcv_skb
, 0, sk
, skb
);
2001 EXPORT_SYMBOL(security_sock_rcv_skb
);
2003 int security_socket_getpeersec_stream(struct socket
*sock
, char __user
*optval
,
2004 int __user
*optlen
, unsigned len
)
2006 return call_int_hook(socket_getpeersec_stream
, -ENOPROTOOPT
, sock
,
2007 optval
, optlen
, len
);
2010 int security_socket_getpeersec_dgram(struct socket
*sock
, struct sk_buff
*skb
, u32
*secid
)
2012 return call_int_hook(socket_getpeersec_dgram
, -ENOPROTOOPT
, sock
,
2015 EXPORT_SYMBOL(security_socket_getpeersec_dgram
);
2017 int security_sk_alloc(struct sock
*sk
, int family
, gfp_t priority
)
2019 return call_int_hook(sk_alloc_security
, 0, sk
, family
, priority
);
2022 void security_sk_free(struct sock
*sk
)
2024 call_void_hook(sk_free_security
, sk
);
2027 void security_sk_clone(const struct sock
*sk
, struct sock
*newsk
)
2029 call_void_hook(sk_clone_security
, sk
, newsk
);
2031 EXPORT_SYMBOL(security_sk_clone
);
2033 void security_sk_classify_flow(struct sock
*sk
, struct flowi
*fl
)
2035 call_void_hook(sk_getsecid
, sk
, &fl
->flowi_secid
);
2037 EXPORT_SYMBOL(security_sk_classify_flow
);
2039 void security_req_classify_flow(const struct request_sock
*req
, struct flowi
*fl
)
2041 call_void_hook(req_classify_flow
, req
, fl
);
2043 EXPORT_SYMBOL(security_req_classify_flow
);
2045 void security_sock_graft(struct sock
*sk
, struct socket
*parent
)
2047 call_void_hook(sock_graft
, sk
, parent
);
2049 EXPORT_SYMBOL(security_sock_graft
);
2051 int security_inet_conn_request(struct sock
*sk
,
2052 struct sk_buff
*skb
, struct request_sock
*req
)
2054 return call_int_hook(inet_conn_request
, 0, sk
, skb
, req
);
2056 EXPORT_SYMBOL(security_inet_conn_request
);
2058 void security_inet_csk_clone(struct sock
*newsk
,
2059 const struct request_sock
*req
)
2061 call_void_hook(inet_csk_clone
, newsk
, req
);
2064 void security_inet_conn_established(struct sock
*sk
,
2065 struct sk_buff
*skb
)
2067 call_void_hook(inet_conn_established
, sk
, skb
);
2069 EXPORT_SYMBOL(security_inet_conn_established
);
2071 int security_secmark_relabel_packet(u32 secid
)
2073 return call_int_hook(secmark_relabel_packet
, 0, secid
);
2075 EXPORT_SYMBOL(security_secmark_relabel_packet
);
2077 void security_secmark_refcount_inc(void)
2079 call_void_hook(secmark_refcount_inc
);
2081 EXPORT_SYMBOL(security_secmark_refcount_inc
);
2083 void security_secmark_refcount_dec(void)
2085 call_void_hook(secmark_refcount_dec
);
2087 EXPORT_SYMBOL(security_secmark_refcount_dec
);
2089 int security_tun_dev_alloc_security(void **security
)
2091 return call_int_hook(tun_dev_alloc_security
, 0, security
);
2093 EXPORT_SYMBOL(security_tun_dev_alloc_security
);
2095 void security_tun_dev_free_security(void *security
)
2097 call_void_hook(tun_dev_free_security
, security
);
2099 EXPORT_SYMBOL(security_tun_dev_free_security
);
2101 int security_tun_dev_create(void)
2103 return call_int_hook(tun_dev_create
, 0);
2105 EXPORT_SYMBOL(security_tun_dev_create
);
2107 int security_tun_dev_attach_queue(void *security
)
2109 return call_int_hook(tun_dev_attach_queue
, 0, security
);
2111 EXPORT_SYMBOL(security_tun_dev_attach_queue
);
2113 int security_tun_dev_attach(struct sock
*sk
, void *security
)
2115 return call_int_hook(tun_dev_attach
, 0, sk
, security
);
2117 EXPORT_SYMBOL(security_tun_dev_attach
);
2119 int security_tun_dev_open(void *security
)
2121 return call_int_hook(tun_dev_open
, 0, security
);
2123 EXPORT_SYMBOL(security_tun_dev_open
);
2125 int security_sctp_assoc_request(struct sctp_endpoint
*ep
, struct sk_buff
*skb
)
2127 return call_int_hook(sctp_assoc_request
, 0, ep
, skb
);
2129 EXPORT_SYMBOL(security_sctp_assoc_request
);
2131 int security_sctp_bind_connect(struct sock
*sk
, int optname
,
2132 struct sockaddr
*address
, int addrlen
)
2134 return call_int_hook(sctp_bind_connect
, 0, sk
, optname
,
2137 EXPORT_SYMBOL(security_sctp_bind_connect
);
2139 void security_sctp_sk_clone(struct sctp_endpoint
*ep
, struct sock
*sk
,
2142 call_void_hook(sctp_sk_clone
, ep
, sk
, newsk
);
2144 EXPORT_SYMBOL(security_sctp_sk_clone
);
2146 #endif /* CONFIG_SECURITY_NETWORK */
2148 #ifdef CONFIG_SECURITY_INFINIBAND
2150 int security_ib_pkey_access(void *sec
, u64 subnet_prefix
, u16 pkey
)
2152 return call_int_hook(ib_pkey_access
, 0, sec
, subnet_prefix
, pkey
);
2154 EXPORT_SYMBOL(security_ib_pkey_access
);
2156 int security_ib_endport_manage_subnet(void *sec
, const char *dev_name
, u8 port_num
)
2158 return call_int_hook(ib_endport_manage_subnet
, 0, sec
, dev_name
, port_num
);
2160 EXPORT_SYMBOL(security_ib_endport_manage_subnet
);
2162 int security_ib_alloc_security(void **sec
)
2164 return call_int_hook(ib_alloc_security
, 0, sec
);
2166 EXPORT_SYMBOL(security_ib_alloc_security
);
2168 void security_ib_free_security(void *sec
)
2170 call_void_hook(ib_free_security
, sec
);
2172 EXPORT_SYMBOL(security_ib_free_security
);
2173 #endif /* CONFIG_SECURITY_INFINIBAND */
2175 #ifdef CONFIG_SECURITY_NETWORK_XFRM
2177 int security_xfrm_policy_alloc(struct xfrm_sec_ctx
**ctxp
,
2178 struct xfrm_user_sec_ctx
*sec_ctx
,
2181 return call_int_hook(xfrm_policy_alloc_security
, 0, ctxp
, sec_ctx
, gfp
);
2183 EXPORT_SYMBOL(security_xfrm_policy_alloc
);
2185 int security_xfrm_policy_clone(struct xfrm_sec_ctx
*old_ctx
,
2186 struct xfrm_sec_ctx
**new_ctxp
)
2188 return call_int_hook(xfrm_policy_clone_security
, 0, old_ctx
, new_ctxp
);
2191 void security_xfrm_policy_free(struct xfrm_sec_ctx
*ctx
)
2193 call_void_hook(xfrm_policy_free_security
, ctx
);
2195 EXPORT_SYMBOL(security_xfrm_policy_free
);
2197 int security_xfrm_policy_delete(struct xfrm_sec_ctx
*ctx
)
2199 return call_int_hook(xfrm_policy_delete_security
, 0, ctx
);
2202 int security_xfrm_state_alloc(struct xfrm_state
*x
,
2203 struct xfrm_user_sec_ctx
*sec_ctx
)
2205 return call_int_hook(xfrm_state_alloc
, 0, x
, sec_ctx
);
2207 EXPORT_SYMBOL(security_xfrm_state_alloc
);
2209 int security_xfrm_state_alloc_acquire(struct xfrm_state
*x
,
2210 struct xfrm_sec_ctx
*polsec
, u32 secid
)
2212 return call_int_hook(xfrm_state_alloc_acquire
, 0, x
, polsec
, secid
);
2215 int security_xfrm_state_delete(struct xfrm_state
*x
)
2217 return call_int_hook(xfrm_state_delete_security
, 0, x
);
2219 EXPORT_SYMBOL(security_xfrm_state_delete
);
2221 void security_xfrm_state_free(struct xfrm_state
*x
)
2223 call_void_hook(xfrm_state_free_security
, x
);
2226 int security_xfrm_policy_lookup(struct xfrm_sec_ctx
*ctx
, u32 fl_secid
, u8 dir
)
2228 return call_int_hook(xfrm_policy_lookup
, 0, ctx
, fl_secid
, dir
);
2231 int security_xfrm_state_pol_flow_match(struct xfrm_state
*x
,
2232 struct xfrm_policy
*xp
,
2233 const struct flowi
*fl
)
2235 struct security_hook_list
*hp
;
2239 * Since this function is expected to return 0 or 1, the judgment
2240 * becomes difficult if multiple LSMs supply this call. Fortunately,
2241 * we can use the first LSM's judgment because currently only SELinux
2242 * supplies this call.
2244 * For speed optimization, we explicitly break the loop rather than
2247 hlist_for_each_entry(hp
, &security_hook_heads
.xfrm_state_pol_flow_match
,
2249 rc
= hp
->hook
.xfrm_state_pol_flow_match(x
, xp
, fl
);
2255 int security_xfrm_decode_session(struct sk_buff
*skb
, u32
*secid
)
2257 return call_int_hook(xfrm_decode_session
, 0, skb
, secid
, 1);
2260 void security_skb_classify_flow(struct sk_buff
*skb
, struct flowi
*fl
)
2262 int rc
= call_int_hook(xfrm_decode_session
, 0, skb
, &fl
->flowi_secid
,
2267 EXPORT_SYMBOL(security_skb_classify_flow
);
2269 #endif /* CONFIG_SECURITY_NETWORK_XFRM */
2273 int security_key_alloc(struct key
*key
, const struct cred
*cred
,
2274 unsigned long flags
)
2276 return call_int_hook(key_alloc
, 0, key
, cred
, flags
);
2279 void security_key_free(struct key
*key
)
2281 call_void_hook(key_free
, key
);
2284 int security_key_permission(key_ref_t key_ref
,
2285 const struct cred
*cred
, unsigned perm
)
2287 return call_int_hook(key_permission
, 0, key_ref
, cred
, perm
);
2290 int security_key_getsecurity(struct key
*key
, char **_buffer
)
2293 return call_int_hook(key_getsecurity
, 0, key
, _buffer
);
2296 #endif /* CONFIG_KEYS */
2300 int security_audit_rule_init(u32 field
, u32 op
, char *rulestr
, void **lsmrule
)
2302 return call_int_hook(audit_rule_init
, 0, field
, op
, rulestr
, lsmrule
);
2305 int security_audit_rule_known(struct audit_krule
*krule
)
2307 return call_int_hook(audit_rule_known
, 0, krule
);
2310 void security_audit_rule_free(void *lsmrule
)
2312 call_void_hook(audit_rule_free
, lsmrule
);
2315 int security_audit_rule_match(u32 secid
, u32 field
, u32 op
, void *lsmrule
)
2317 return call_int_hook(audit_rule_match
, 0, secid
, field
, op
, lsmrule
);
2319 #endif /* CONFIG_AUDIT */
2321 #ifdef CONFIG_BPF_SYSCALL
2322 int security_bpf(int cmd
, union bpf_attr
*attr
, unsigned int size
)
2324 return call_int_hook(bpf
, 0, cmd
, attr
, size
);
2326 int security_bpf_map(struct bpf_map
*map
, fmode_t fmode
)
2328 return call_int_hook(bpf_map
, 0, map
, fmode
);
2330 int security_bpf_prog(struct bpf_prog
*prog
)
2332 return call_int_hook(bpf_prog
, 0, prog
);
2334 int security_bpf_map_alloc(struct bpf_map
*map
)
2336 return call_int_hook(bpf_map_alloc_security
, 0, map
);
2338 int security_bpf_prog_alloc(struct bpf_prog_aux
*aux
)
2340 return call_int_hook(bpf_prog_alloc_security
, 0, aux
);
2342 void security_bpf_map_free(struct bpf_map
*map
)
2344 call_void_hook(bpf_map_free_security
, map
);
2346 void security_bpf_prog_free(struct bpf_prog_aux
*aux
)
2348 call_void_hook(bpf_prog_free_security
, aux
);
2350 #endif /* CONFIG_BPF_SYSCALL */