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 #include <linux/bpf.h>
16 #include <linux/capability.h>
17 #include <linux/dcache.h>
18 #include <linux/module.h>
19 #include <linux/init.h>
20 #include <linux/kernel.h>
21 #include <linux/lsm_hooks.h>
22 #include <linux/integrity.h>
23 #include <linux/ima.h>
24 #include <linux/evm.h>
25 #include <linux/fsnotify.h>
26 #include <linux/mman.h>
27 #include <linux/mount.h>
28 #include <linux/personality.h>
29 #include <linux/backing-dev.h>
30 #include <linux/string.h>
31 #include <linux/msg.h>
35 #define MAX_LSM_EVM_XATTR 2
37 /* Maximum number of letters for an LSM name string */
38 #define SECURITY_NAME_MAX 10
39 #define MODULE_STACK "(stacking)"
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
;
50 /* Boot-time LSM user choice */
51 static __initdata
char chosen_lsm
[SECURITY_NAME_MAX
+ 1] =
52 #ifdef CONFIG_SECURITY_STACKING
55 CONFIG_DEFAULT_SECURITY
;
58 static void __init
do_security_initcalls(void)
61 call
= __security_initcall_start
;
62 while (call
< __security_initcall_end
) {
69 * security_init - initializes the security framework
71 * This should be called early in the kernel initialization sequence.
73 int __init
security_init(void)
76 struct list_head
*list
= (struct list_head
*) &security_hook_heads
;
78 for (i
= 0; i
< sizeof(security_hook_heads
) / sizeof(struct list_head
);
80 INIT_LIST_HEAD(&list
[i
]);
81 pr_info("Security Framework initialized\n");
84 * Load minor LSMs, with the capability module always first.
86 capability_add_hooks();
91 * The first call to a module specific init function
92 * updates the blob size requirements.
94 do_security_initcalls();
97 * Create any kmem_caches needed for blobs
99 if (blob_sizes
.lbs_file
)
100 lsm_file_cache
= kmem_cache_create("lsm_file_cache",
101 blob_sizes
.lbs_file
, 0,
103 if (blob_sizes
.lbs_inode
)
104 lsm_inode_cache
= kmem_cache_create("lsm_inode_cache",
105 blob_sizes
.lbs_inode
, 0,
108 * The second call to a module specific init function
109 * adds hooks to the hook lists and does any other early
110 * initializations required.
112 do_security_initcalls();
114 #ifdef CONFIG_SECURITY_LSM_DEBUG
115 pr_info("LSM: cred blob size = %d\n", blob_sizes
.lbs_cred
);
116 pr_info("LSM: file blob size = %d\n", blob_sizes
.lbs_file
);
117 pr_info("LSM: inode blob size = %d\n", blob_sizes
.lbs_inode
);
118 pr_info("LSM: ipc blob size = %d\n", blob_sizes
.lbs_ipc
);
120 pr_info("LSM: key blob size = %d\n", blob_sizes
.lbs_key
);
121 #endif /* CONFIG_KEYS */
122 pr_info("LSM: msg_msg blob size = %d\n", blob_sizes
.lbs_msg_msg
);
123 pr_info("LSM: sock blob size = %d\n", blob_sizes
.lbs_sock
);
124 pr_info("LSM: superblock blob size = %d\n", blob_sizes
.lbs_superblock
);
125 pr_info("LSM: task blob size = %d\n", blob_sizes
.lbs_task
);
126 #endif /* CONFIG_SECURITY_LSM_DEBUG */
131 /* Save user chosen LSM */
132 static int __init
choose_lsm(char *str
)
134 strncpy(chosen_lsm
, str
, SECURITY_NAME_MAX
);
137 __setup("security=", choose_lsm
);
139 static bool match_last_lsm(const char *list
, const char *lsm
)
143 if (WARN_ON(!list
|| !lsm
))
145 last
= strrchr(list
, ',');
147 /* Pass the comma, strcmp() will check for '\0' */
151 return !strcmp(last
, lsm
);
154 static int lsm_append(char *new, char **result
)
158 if (*result
== NULL
) {
159 *result
= kstrdup(new, GFP_KERNEL
);
161 /* Check if it is the last registered name */
162 if (match_last_lsm(*result
, new))
164 cp
= kasprintf(GFP_KERNEL
, "%s,%s", *result
, new);
174 * security_module_enable - Load given security module on boot ?
175 * @module: the name of the module
176 * @stacked: indicates that the module wants to be stacked
178 * Each LSM must pass this method before registering its own operations
179 * to avoid security registration races. This method may also be used
180 * to check if your LSM is currently loaded during kernel initialization.
186 * - The passed LSM is the one chosen by user at boot time,
187 * - or the passed LSM is configured as the default and the user did not
188 * choose an alternate LSM at boot time.
190 * Otherwise, return false.
192 bool __init
security_module_enable(const char *lsm
, const bool stacked
)
194 #ifdef CONFIG_SECURITY_STACKING
196 * Module defined on the command line security=XXXX
198 if (strcmp(chosen_lsm
, MODULE_STACK
)) {
199 if (!strcmp(lsm
, chosen_lsm
)) {
200 pr_info("Command line sets the %s security module.\n",
207 * Module configured as stacked.
211 if (strcmp(lsm
, chosen_lsm
) == 0)
218 * security_add_hooks - Add a modules hooks to the hook lists.
219 * @hooks: the hooks to add
220 * @count: the number of hooks to add
221 * @lsm: the name of the security module
223 * Each LSM has to register its hooks with the infrastructure.
225 void __init
security_add_hooks(struct security_hook_list
*hooks
, int count
,
230 for (i
= 0; i
< count
; i
++) {
232 list_add_tail_rcu(&hooks
[i
].list
, hooks
[i
].head
);
234 if (lsm_append(lsm
, &lsm_names
) < 0)
235 panic("%s - Cannot get early memory.\n", __func__
);
238 int call_lsm_notifier(enum lsm_event event
, void *data
)
240 return atomic_notifier_call_chain(&lsm_notifier_chain
, event
, data
);
242 EXPORT_SYMBOL(call_lsm_notifier
);
244 int register_lsm_notifier(struct notifier_block
*nb
)
246 return atomic_notifier_chain_register(&lsm_notifier_chain
, nb
);
248 EXPORT_SYMBOL(register_lsm_notifier
);
250 int unregister_lsm_notifier(struct notifier_block
*nb
)
252 return atomic_notifier_chain_unregister(&lsm_notifier_chain
, nb
);
254 EXPORT_SYMBOL(unregister_lsm_notifier
);
257 * lsm_cred_alloc - allocate a composite cred blob
258 * @cred: the cred that needs a blob
259 * @gfp: allocation type
261 * Allocate the cred blob for all the modules
263 * Returns 0, or -ENOMEM if memory can't be allocated.
265 int lsm_cred_alloc(struct cred
*cred
, gfp_t gfp
)
267 if (blob_sizes
.lbs_cred
== 0) {
268 cred
->security
= NULL
;
272 cred
->security
= kzalloc(blob_sizes
.lbs_cred
, gfp
);
273 if (cred
->security
== NULL
)
279 * lsm_early_cred - during initialization allocate a composite cred blob
280 * @cred: the cred that needs a blob
282 * Allocate the cred blob for all the modules if it's not already there
284 void lsm_early_cred(struct cred
*cred
)
289 panic("%s: NULL cred.\n", __func__
);
290 if (cred
->security
!= NULL
)
292 rc
= lsm_cred_alloc(cred
, GFP_KERNEL
);
294 panic("%s: Early cred alloc failed.\n", __func__
);
297 static void __init
lsm_set_size(int *need
, int *lbs
)
309 * security_add_blobs - Report blob sizes
310 * @needed: the size of blobs needed by the module
312 * Each LSM has to register its blobs with the infrastructure.
313 * The "needed" data tells the infrastructure how much memory
314 * the module requires for each of its blobs. On return the
315 * structure is filled with the offset that module should use
316 * from the blob pointer.
318 void __init
security_add_blobs(struct lsm_blob_sizes
*needed
)
320 lsm_set_size(&needed
->lbs_cred
, &blob_sizes
.lbs_cred
);
321 lsm_set_size(&needed
->lbs_file
, &blob_sizes
.lbs_file
);
322 lsm_set_size(&needed
->lbs_ipc
, &blob_sizes
.lbs_ipc
);
323 lsm_set_size(&needed
->lbs_key
, &blob_sizes
.lbs_key
);
324 lsm_set_size(&needed
->lbs_msg_msg
, &blob_sizes
.lbs_msg_msg
);
325 lsm_set_size(&needed
->lbs_sock
, &blob_sizes
.lbs_sock
);
326 lsm_set_size(&needed
->lbs_superblock
, &blob_sizes
.lbs_superblock
);
327 lsm_set_size(&needed
->lbs_task
, &blob_sizes
.lbs_task
);
329 * The inode blob gets an rcu_head in addition to
330 * what the modules might need.
332 if (needed
->lbs_inode
&& blob_sizes
.lbs_inode
== 0)
333 blob_sizes
.lbs_inode
= sizeof(struct rcu_head
);
334 lsm_set_size(&needed
->lbs_inode
, &blob_sizes
.lbs_inode
);
338 * lsm_file_alloc - allocate a composite file blob
339 * @file: the file that needs a blob
341 * Allocate the file blob for all the modules
343 * Returns 0, or -ENOMEM if memory can't be allocated.
345 int lsm_file_alloc(struct file
*file
)
347 if (!lsm_file_cache
) {
348 file
->f_security
= NULL
;
352 file
->f_security
= kmem_cache_zalloc(lsm_file_cache
, GFP_KERNEL
);
353 if (file
->f_security
== NULL
)
359 * lsm_task_alloc - allocate a composite task blob
360 * @task: the task that needs a blob
362 * Allocate the task blob for all the modules
364 * Returns 0, or -ENOMEM if memory can't be allocated.
366 int lsm_task_alloc(struct task_struct
*task
)
368 if (blob_sizes
.lbs_task
== 0) {
369 task
->security
= NULL
;
373 task
->security
= kzalloc(blob_sizes
.lbs_task
, GFP_KERNEL
);
374 if (task
->security
== NULL
)
380 * lsm_inode_alloc - allocate a composite inode blob
381 * @inode: the inode that needs a blob
383 * Allocate the inode blob for all the modules
385 * Returns 0, or -ENOMEM if memory can't be allocated.
387 int lsm_inode_alloc(struct inode
*inode
)
389 if (!lsm_inode_cache
) {
390 inode
->i_security
= NULL
;
394 inode
->i_security
= kmem_cache_zalloc(lsm_inode_cache
, GFP_KERNEL
);
395 if (inode
->i_security
== NULL
)
401 * lsm_early_inode - during initialization allocate a composite inode blob
402 * @inode: the inode that needs a blob
404 * Allocate the inode blob for all the modules if it's not already there
406 void lsm_early_inode(struct inode
*inode
)
411 panic("%s: NULL inode.\n", __func__
);
412 if (inode
->i_security
!= NULL
)
414 rc
= lsm_inode_alloc(inode
);
416 panic("%s: Early inode alloc failed.\n", __func__
);
420 * lsm_ipc_alloc - allocate a composite ipc blob
421 * @kip: the ipc that needs a blob
423 * Allocate the ipc blob for all the modules
425 * Returns 0, or -ENOMEM if memory can't be allocated.
427 int lsm_ipc_alloc(struct kern_ipc_perm
*kip
)
429 if (blob_sizes
.lbs_ipc
== 0) {
430 kip
->security
= NULL
;
434 kip
->security
= kzalloc(blob_sizes
.lbs_ipc
, GFP_KERNEL
);
435 if (kip
->security
== NULL
)
442 * lsm_key_alloc - allocate a composite key blob
443 * @key: the key that needs a blob
445 * Allocate the key blob for all the modules
447 * Returns 0, or -ENOMEM if memory can't be allocated.
449 int lsm_key_alloc(struct key
*key
)
451 if (blob_sizes
.lbs_key
== 0) {
452 key
->security
= NULL
;
456 key
->security
= kzalloc(blob_sizes
.lbs_key
, GFP_KERNEL
);
457 if (key
->security
== NULL
)
461 #endif /* CONFIG_KEYS */
464 * lsm_msg_msg_alloc - allocate a composite msg_msg blob
465 * @mp: the msg_msg that needs a blob
467 * Allocate the ipc blob for all the modules
469 * Returns 0, or -ENOMEM if memory can't be allocated.
471 int lsm_msg_msg_alloc(struct msg_msg
*mp
)
473 if (blob_sizes
.lbs_msg_msg
== 0) {
478 mp
->security
= kzalloc(blob_sizes
.lbs_msg_msg
, GFP_KERNEL
);
479 if (mp
->security
== NULL
)
485 * lsm_sock_alloc - allocate a composite sock blob
486 * @sock: the sock that needs a blob
487 * @priority: allocation mode
489 * Allocate the sock blob for all the modules
491 * Returns 0, or -ENOMEM if memory can't be allocated.
493 int lsm_sock_alloc(struct sock
*sock
, gfp_t priority
)
495 if (blob_sizes
.lbs_sock
== 0) {
496 sock
->sk_security
= NULL
;
500 sock
->sk_security
= kzalloc(blob_sizes
.lbs_sock
, priority
);
501 if (sock
->sk_security
== NULL
)
507 * lsm_superblock_alloc - allocate a composite superblock blob
508 * @sb: the superblock that needs a blob
510 * Allocate the superblock blob for all the modules
512 * Returns 0, or -ENOMEM if memory can't be allocated.
514 int lsm_superblock_alloc(struct super_block
*sb
)
516 if (blob_sizes
.lbs_superblock
== 0) {
517 sb
->s_security
= NULL
;
521 sb
->s_security
= kzalloc(blob_sizes
.lbs_superblock
, GFP_KERNEL
);
522 if (sb
->s_security
== NULL
)
528 * Hook list operation macros.
531 * This is a hook that does not return a value.
534 * This is a hook that returns a value.
537 #define call_void_hook(FUNC, ...) \
539 struct security_hook_list *P; \
541 list_for_each_entry(P, &security_hook_heads.FUNC, list) \
542 P->hook.FUNC(__VA_ARGS__); \
545 #define call_int_hook(FUNC, IRC, ...) ({ \
548 struct security_hook_list *P; \
550 list_for_each_entry(P, &security_hook_heads.FUNC, list) { \
551 RC = P->hook.FUNC(__VA_ARGS__); \
559 /* Security operations */
561 int security_binder_set_context_mgr(struct task_struct
*mgr
)
563 return call_int_hook(binder_set_context_mgr
, 0, mgr
);
566 int security_binder_transaction(struct task_struct
*from
,
567 struct task_struct
*to
)
569 return call_int_hook(binder_transaction
, 0, from
, to
);
572 int security_binder_transfer_binder(struct task_struct
*from
,
573 struct task_struct
*to
)
575 return call_int_hook(binder_transfer_binder
, 0, from
, to
);
578 int security_binder_transfer_file(struct task_struct
*from
,
579 struct task_struct
*to
, struct file
*file
)
581 return call_int_hook(binder_transfer_file
, 0, from
, to
, file
);
584 int security_ptrace_access_check(struct task_struct
*child
, unsigned int mode
)
586 return call_int_hook(ptrace_access_check
, 0, child
, mode
);
589 int security_ptrace_traceme(struct task_struct
*parent
)
591 return call_int_hook(ptrace_traceme
, 0, parent
);
594 int security_capget(struct task_struct
*target
,
595 kernel_cap_t
*effective
,
596 kernel_cap_t
*inheritable
,
597 kernel_cap_t
*permitted
)
599 return call_int_hook(capget
, 0, target
,
600 effective
, inheritable
, permitted
);
603 int security_capset(struct cred
*new, const struct cred
*old
,
604 const kernel_cap_t
*effective
,
605 const kernel_cap_t
*inheritable
,
606 const kernel_cap_t
*permitted
)
608 return call_int_hook(capset
, 0, new, old
,
609 effective
, inheritable
, permitted
);
612 int security_capable(const struct cred
*cred
, struct user_namespace
*ns
,
615 return call_int_hook(capable
, 0, cred
, ns
, cap
, SECURITY_CAP_AUDIT
);
618 int security_capable_noaudit(const struct cred
*cred
, struct user_namespace
*ns
,
621 return call_int_hook(capable
, 0, cred
, ns
, cap
, SECURITY_CAP_NOAUDIT
);
624 int security_quotactl(int cmds
, int type
, int id
, struct super_block
*sb
)
626 return call_int_hook(quotactl
, 0, cmds
, type
, id
, sb
);
629 int security_quota_on(struct dentry
*dentry
)
631 return call_int_hook(quota_on
, 0, dentry
);
634 int security_syslog(int type
)
636 return call_int_hook(syslog
, 0, type
);
639 int security_settime64(const struct timespec64
*ts
, const struct timezone
*tz
)
641 return call_int_hook(settime
, 0, ts
, tz
);
644 int security_vm_enough_memory_mm(struct mm_struct
*mm
, long pages
)
646 struct security_hook_list
*hp
;
647 int cap_sys_admin
= 1;
651 * The module will respond with a positive value if
652 * it thinks the __vm_enough_memory() call should be
653 * made with the cap_sys_admin set. If all of the modules
654 * agree that it should be set it will. If any module
655 * thinks it should not be set it won't.
657 list_for_each_entry(hp
, &security_hook_heads
.vm_enough_memory
, list
) {
658 rc
= hp
->hook
.vm_enough_memory(mm
, pages
);
664 return __vm_enough_memory(mm
, pages
, cap_sys_admin
);
667 int security_bprm_set_creds(struct linux_binprm
*bprm
)
669 return call_int_hook(bprm_set_creds
, 0, bprm
);
672 int security_bprm_check(struct linux_binprm
*bprm
)
676 ret
= call_int_hook(bprm_check_security
, 0, bprm
);
679 return ima_bprm_check(bprm
);
682 void security_bprm_committing_creds(struct linux_binprm
*bprm
)
684 call_void_hook(bprm_committing_creds
, bprm
);
687 void security_bprm_committed_creds(struct linux_binprm
*bprm
)
689 call_void_hook(bprm_committed_creds
, bprm
);
692 int security_sb_alloc(struct super_block
*sb
)
694 int rc
= lsm_superblock_alloc(sb
);
698 rc
= call_int_hook(sb_alloc_security
, 0, sb
);
700 security_sb_free(sb
);
704 void security_sb_free(struct super_block
*sb
)
706 call_void_hook(sb_free_security
, sb
);
707 kfree(sb
->s_security
);
708 sb
->s_security
= NULL
;
711 int security_sb_copy_data(char *orig
, char *copy
)
713 return call_int_hook(sb_copy_data
, 0, orig
, copy
);
715 EXPORT_SYMBOL(security_sb_copy_data
);
717 int security_sb_remount(struct super_block
*sb
, void *data
)
719 return call_int_hook(sb_remount
, 0, sb
, data
);
722 int security_sb_kern_mount(struct super_block
*sb
, int flags
, void *data
)
724 return call_int_hook(sb_kern_mount
, 0, sb
, flags
, data
);
727 int security_sb_show_options(struct seq_file
*m
, struct super_block
*sb
)
729 return call_int_hook(sb_show_options
, 0, m
, sb
);
732 int security_sb_statfs(struct dentry
*dentry
)
734 return call_int_hook(sb_statfs
, 0, dentry
);
737 int security_sb_mount(const char *dev_name
, const struct path
*path
,
738 const char *type
, unsigned long flags
, void *data
)
740 return call_int_hook(sb_mount
, 0, dev_name
, path
, type
, flags
, data
);
743 int security_sb_umount(struct vfsmount
*mnt
, int flags
)
745 return call_int_hook(sb_umount
, 0, mnt
, flags
);
748 int security_sb_pivotroot(const struct path
*old_path
, const struct path
*new_path
)
750 return call_int_hook(sb_pivotroot
, 0, old_path
, new_path
);
753 int security_sb_set_mnt_opts(struct super_block
*sb
,
754 struct security_mnt_opts
*opts
,
755 unsigned long kern_flags
,
756 unsigned long *set_kern_flags
)
758 return call_int_hook(sb_set_mnt_opts
,
759 opts
->num_mnt_opts
? -EOPNOTSUPP
: 0, sb
,
760 opts
, kern_flags
, set_kern_flags
);
762 EXPORT_SYMBOL(security_sb_set_mnt_opts
);
764 int security_sb_clone_mnt_opts(const struct super_block
*oldsb
,
765 struct super_block
*newsb
,
766 unsigned long kern_flags
,
767 unsigned long *set_kern_flags
)
769 return call_int_hook(sb_clone_mnt_opts
, 0, oldsb
, newsb
,
770 kern_flags
, set_kern_flags
);
772 EXPORT_SYMBOL(security_sb_clone_mnt_opts
);
774 int security_sb_parse_opts_str(char *options
, struct security_mnt_opts
*opts
)
776 return call_int_hook(sb_parse_opts_str
, 0, options
, opts
);
778 EXPORT_SYMBOL(security_sb_parse_opts_str
);
780 int security_inode_alloc(struct inode
*inode
)
782 int rc
= lsm_inode_alloc(inode
);
786 rc
= call_int_hook(inode_alloc_security
, 0, inode
);
788 security_inode_free(inode
);
792 static void inode_free_by_rcu(struct rcu_head
*head
)
795 * The rcu head is at the start of the inode blob
797 kmem_cache_free(lsm_inode_cache
, head
);
800 void security_inode_free(struct inode
*inode
)
802 integrity_inode_free(inode
);
803 call_void_hook(inode_free_security
, inode
);
805 * The inode may still be referenced in a path walk and
806 * a call to security_inode_permission() can be made
807 * after inode_free_security() is called. Ideally, the VFS
808 * wouldn't do this, but fixing that is a much harder
809 * job. For now, simply free the i_security via RCU, and
810 * leave the current inode->i_security pointer intact.
811 * The inode will be freed after the RCU grace period too.
813 if (inode
->i_security
)
814 call_rcu((struct rcu_head
*)inode
->i_security
,
818 int security_dentry_init_security(struct dentry
*dentry
, int mode
,
819 const struct qstr
*name
, void **ctx
,
822 return call_int_hook(dentry_init_security
, -EOPNOTSUPP
, dentry
, mode
,
825 EXPORT_SYMBOL(security_dentry_init_security
);
827 int security_dentry_create_files_as(struct dentry
*dentry
, int mode
,
829 const struct cred
*old
, struct cred
*new)
831 return call_int_hook(dentry_create_files_as
, 0, dentry
, mode
,
834 EXPORT_SYMBOL(security_dentry_create_files_as
);
836 int security_inode_init_security(struct inode
*inode
, struct inode
*dir
,
837 const struct qstr
*qstr
,
838 const initxattrs initxattrs
, void *fs_data
)
840 struct xattr new_xattrs
[MAX_LSM_EVM_XATTR
+ 1];
841 struct xattr
*lsm_xattr
, *evm_xattr
, *xattr
;
844 if (unlikely(IS_PRIVATE(inode
)))
848 return call_int_hook(inode_init_security
, -EOPNOTSUPP
, inode
,
849 dir
, qstr
, NULL
, NULL
, NULL
);
850 memset(new_xattrs
, 0, sizeof(new_xattrs
));
851 lsm_xattr
= new_xattrs
;
852 ret
= call_int_hook(inode_init_security
, -EOPNOTSUPP
, inode
, dir
, qstr
,
855 &lsm_xattr
->value_len
);
859 evm_xattr
= lsm_xattr
+ 1;
860 ret
= evm_inode_init_security(inode
, lsm_xattr
, evm_xattr
);
863 ret
= initxattrs(inode
, new_xattrs
, fs_data
);
865 for (xattr
= new_xattrs
; xattr
->value
!= NULL
; xattr
++)
867 return (ret
== -EOPNOTSUPP
) ? 0 : ret
;
869 EXPORT_SYMBOL(security_inode_init_security
);
871 int security_old_inode_init_security(struct inode
*inode
, struct inode
*dir
,
872 const struct qstr
*qstr
, const char **name
,
873 void **value
, size_t *len
)
875 if (unlikely(IS_PRIVATE(inode
)))
877 return call_int_hook(inode_init_security
, -EOPNOTSUPP
, inode
, dir
,
878 qstr
, name
, value
, len
);
880 EXPORT_SYMBOL(security_old_inode_init_security
);
882 #ifdef CONFIG_SECURITY_PATH
883 int security_path_mknod(const struct path
*dir
, struct dentry
*dentry
, umode_t mode
,
886 if (unlikely(IS_PRIVATE(d_backing_inode(dir
->dentry
))))
888 return call_int_hook(path_mknod
, 0, dir
, dentry
, mode
, dev
);
890 EXPORT_SYMBOL(security_path_mknod
);
892 int security_path_mkdir(const struct path
*dir
, struct dentry
*dentry
, umode_t mode
)
894 if (unlikely(IS_PRIVATE(d_backing_inode(dir
->dentry
))))
896 return call_int_hook(path_mkdir
, 0, dir
, dentry
, mode
);
898 EXPORT_SYMBOL(security_path_mkdir
);
900 int security_path_rmdir(const struct path
*dir
, struct dentry
*dentry
)
902 if (unlikely(IS_PRIVATE(d_backing_inode(dir
->dentry
))))
904 return call_int_hook(path_rmdir
, 0, dir
, dentry
);
906 EXPORT_SYMBOL_GPL(security_path_rmdir
);
908 int security_path_unlink(const struct path
*dir
, struct dentry
*dentry
)
910 if (unlikely(IS_PRIVATE(d_backing_inode(dir
->dentry
))))
912 return call_int_hook(path_unlink
, 0, dir
, dentry
);
914 EXPORT_SYMBOL(security_path_unlink
);
916 int security_path_symlink(const struct path
*dir
, struct dentry
*dentry
,
917 const char *old_name
)
919 if (unlikely(IS_PRIVATE(d_backing_inode(dir
->dentry
))))
921 return call_int_hook(path_symlink
, 0, dir
, dentry
, old_name
);
923 EXPORT_SYMBOL_GPL(security_path_symlink
);
925 int security_path_link(struct dentry
*old_dentry
, const struct path
*new_dir
,
926 struct dentry
*new_dentry
)
928 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry
))))
930 return call_int_hook(path_link
, 0, old_dentry
, new_dir
, new_dentry
);
932 EXPORT_SYMBOL_GPL(security_path_link
);
934 int security_path_rename(const struct path
*old_dir
, struct dentry
*old_dentry
,
935 const struct path
*new_dir
, struct dentry
*new_dentry
,
938 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry
)) ||
939 (d_is_positive(new_dentry
) && IS_PRIVATE(d_backing_inode(new_dentry
)))))
942 if (flags
& RENAME_EXCHANGE
) {
943 int err
= call_int_hook(path_rename
, 0, new_dir
, new_dentry
,
944 old_dir
, old_dentry
);
949 return call_int_hook(path_rename
, 0, old_dir
, old_dentry
, new_dir
,
952 EXPORT_SYMBOL(security_path_rename
);
954 int security_path_truncate(const struct path
*path
)
956 if (unlikely(IS_PRIVATE(d_backing_inode(path
->dentry
))))
958 return call_int_hook(path_truncate
, 0, path
);
960 EXPORT_SYMBOL_GPL(security_path_truncate
);
962 int security_path_chmod(const struct path
*path
, umode_t mode
)
964 if (unlikely(IS_PRIVATE(d_backing_inode(path
->dentry
))))
966 return call_int_hook(path_chmod
, 0, path
, mode
);
968 EXPORT_SYMBOL_GPL(security_path_chmod
);
970 int security_path_chown(const struct path
*path
, kuid_t uid
, kgid_t gid
)
972 if (unlikely(IS_PRIVATE(d_backing_inode(path
->dentry
))))
974 return call_int_hook(path_chown
, 0, path
, uid
, gid
);
976 EXPORT_SYMBOL_GPL(security_path_chown
);
978 int security_path_chroot(const struct path
*path
)
980 return call_int_hook(path_chroot
, 0, path
);
984 int security_inode_create(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
)
986 if (unlikely(IS_PRIVATE(dir
)))
988 return call_int_hook(inode_create
, 0, dir
, dentry
, mode
);
990 EXPORT_SYMBOL_GPL(security_inode_create
);
992 int security_inode_link(struct dentry
*old_dentry
, struct inode
*dir
,
993 struct dentry
*new_dentry
)
995 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry
))))
997 return call_int_hook(inode_link
, 0, old_dentry
, dir
, new_dentry
);
1000 int security_inode_unlink(struct inode
*dir
, struct dentry
*dentry
)
1002 if (unlikely(IS_PRIVATE(d_backing_inode(dentry
))))
1004 return call_int_hook(inode_unlink
, 0, dir
, dentry
);
1007 int security_inode_symlink(struct inode
*dir
, struct dentry
*dentry
,
1008 const char *old_name
)
1010 if (unlikely(IS_PRIVATE(dir
)))
1012 return call_int_hook(inode_symlink
, 0, dir
, dentry
, old_name
);
1015 int security_inode_mkdir(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
)
1017 if (unlikely(IS_PRIVATE(dir
)))
1019 return call_int_hook(inode_mkdir
, 0, dir
, dentry
, mode
);
1021 EXPORT_SYMBOL_GPL(security_inode_mkdir
);
1023 int security_inode_rmdir(struct inode
*dir
, struct dentry
*dentry
)
1025 if (unlikely(IS_PRIVATE(d_backing_inode(dentry
))))
1027 return call_int_hook(inode_rmdir
, 0, dir
, dentry
);
1030 int security_inode_mknod(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
, dev_t dev
)
1032 if (unlikely(IS_PRIVATE(dir
)))
1034 return call_int_hook(inode_mknod
, 0, dir
, dentry
, mode
, dev
);
1037 int security_inode_rename(struct inode
*old_dir
, struct dentry
*old_dentry
,
1038 struct inode
*new_dir
, struct dentry
*new_dentry
,
1041 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry
)) ||
1042 (d_is_positive(new_dentry
) && IS_PRIVATE(d_backing_inode(new_dentry
)))))
1045 if (flags
& RENAME_EXCHANGE
) {
1046 int err
= call_int_hook(inode_rename
, 0, new_dir
, new_dentry
,
1047 old_dir
, old_dentry
);
1052 return call_int_hook(inode_rename
, 0, old_dir
, old_dentry
,
1053 new_dir
, new_dentry
);
1056 int security_inode_readlink(struct dentry
*dentry
)
1058 if (unlikely(IS_PRIVATE(d_backing_inode(dentry
))))
1060 return call_int_hook(inode_readlink
, 0, dentry
);
1062 EXPORT_SYMBOL_GPL(security_inode_readlink
);
1064 int security_inode_follow_link(struct dentry
*dentry
, struct inode
*inode
,
1067 if (unlikely(IS_PRIVATE(inode
)))
1069 return call_int_hook(inode_follow_link
, 0, dentry
, inode
, rcu
);
1072 int security_inode_permission(struct inode
*inode
, int mask
)
1074 if (unlikely(IS_PRIVATE(inode
)))
1076 return call_int_hook(inode_permission
, 0, inode
, mask
);
1078 EXPORT_SYMBOL_GPL(security_inode_permission
);
1080 int security_inode_setattr(struct dentry
*dentry
, struct iattr
*attr
)
1084 if (unlikely(IS_PRIVATE(d_backing_inode(dentry
))))
1086 ret
= call_int_hook(inode_setattr
, 0, dentry
, attr
);
1089 return evm_inode_setattr(dentry
, attr
);
1091 EXPORT_SYMBOL_GPL(security_inode_setattr
);
1093 int security_inode_getattr(const struct path
*path
)
1095 if (unlikely(IS_PRIVATE(d_backing_inode(path
->dentry
))))
1097 return call_int_hook(inode_getattr
, 0, path
);
1100 int security_inode_setxattr(struct dentry
*dentry
, const char *name
,
1101 const void *value
, size_t size
, int flags
)
1105 if (unlikely(IS_PRIVATE(d_backing_inode(dentry
))))
1108 * SELinux and Smack integrate the cap call,
1109 * so assume that all LSMs supplying this call do so.
1111 ret
= call_int_hook(inode_setxattr
, 1, dentry
, name
, value
, size
,
1115 ret
= cap_inode_setxattr(dentry
, name
, value
, size
, flags
);
1118 ret
= ima_inode_setxattr(dentry
, name
, value
, size
);
1121 return evm_inode_setxattr(dentry
, name
, value
, size
);
1124 void security_inode_post_setxattr(struct dentry
*dentry
, const char *name
,
1125 const void *value
, size_t size
, int flags
)
1127 if (unlikely(IS_PRIVATE(d_backing_inode(dentry
))))
1129 call_void_hook(inode_post_setxattr
, dentry
, name
, value
, size
, flags
);
1130 evm_inode_post_setxattr(dentry
, name
, value
, size
);
1133 int security_inode_getxattr(struct dentry
*dentry
, const char *name
)
1135 if (unlikely(IS_PRIVATE(d_backing_inode(dentry
))))
1137 return call_int_hook(inode_getxattr
, 0, dentry
, name
);
1140 int security_inode_listxattr(struct dentry
*dentry
)
1142 if (unlikely(IS_PRIVATE(d_backing_inode(dentry
))))
1144 return call_int_hook(inode_listxattr
, 0, dentry
);
1147 int security_inode_removexattr(struct dentry
*dentry
, const char *name
)
1151 if (unlikely(IS_PRIVATE(d_backing_inode(dentry
))))
1154 * SELinux and Smack integrate the cap call,
1155 * so assume that all LSMs supplying this call do so.
1157 ret
= call_int_hook(inode_removexattr
, 1, dentry
, name
);
1159 ret
= cap_inode_removexattr(dentry
, name
);
1162 ret
= ima_inode_removexattr(dentry
, name
);
1165 return evm_inode_removexattr(dentry
, name
);
1168 int security_inode_need_killpriv(struct dentry
*dentry
)
1170 return call_int_hook(inode_need_killpriv
, 0, dentry
);
1173 int security_inode_killpriv(struct dentry
*dentry
)
1175 return call_int_hook(inode_killpriv
, 0, dentry
);
1178 int security_inode_getsecurity(struct inode
*inode
, const char *name
, void **buffer
, bool alloc
)
1180 struct security_hook_list
*hp
;
1183 if (unlikely(IS_PRIVATE(inode
)))
1186 * Only one module will provide an attribute with a given name.
1188 list_for_each_entry(hp
, &security_hook_heads
.inode_getsecurity
, list
) {
1189 rc
= hp
->hook
.inode_getsecurity(inode
, name
, buffer
, alloc
);
1190 if (rc
!= -EOPNOTSUPP
)
1196 int security_inode_setsecurity(struct inode
*inode
, const char *name
, const void *value
, size_t size
, int flags
)
1198 struct security_hook_list
*hp
;
1201 if (unlikely(IS_PRIVATE(inode
)))
1204 * Only one module will provide an attribute with a given name.
1206 list_for_each_entry(hp
, &security_hook_heads
.inode_setsecurity
, list
) {
1207 rc
= hp
->hook
.inode_setsecurity(inode
, name
, value
, size
,
1209 if (rc
!= -EOPNOTSUPP
)
1215 int security_inode_listsecurity(struct inode
*inode
, char *buffer
, size_t buffer_size
)
1217 if (unlikely(IS_PRIVATE(inode
)))
1219 return call_int_hook(inode_listsecurity
, 0, inode
, buffer
, buffer_size
);
1221 EXPORT_SYMBOL(security_inode_listsecurity
);
1223 void security_inode_getsecid(struct inode
*inode
, u32
*secid
)
1225 call_void_hook(inode_getsecid
, inode
, secid
);
1228 int security_inode_copy_up(struct dentry
*src
, struct cred
**new)
1230 return call_int_hook(inode_copy_up
, 0, src
, new);
1232 EXPORT_SYMBOL(security_inode_copy_up
);
1234 int security_inode_copy_up_xattr(const char *name
)
1236 return call_int_hook(inode_copy_up_xattr
, -EOPNOTSUPP
, name
);
1238 EXPORT_SYMBOL(security_inode_copy_up_xattr
);
1240 int security_file_permission(struct file
*file
, int mask
)
1244 ret
= call_int_hook(file_permission
, 0, file
, mask
);
1248 return fsnotify_perm(file
, mask
);
1250 EXPORT_SYMBOL_GPL(security_file_permission
);
1252 int security_file_alloc(struct file
*file
)
1254 int rc
= lsm_file_alloc(file
);
1258 rc
= call_int_hook(file_alloc_security
, 0, file
);
1260 security_file_free(file
);
1264 void security_file_free(struct file
*file
)
1268 if (!lsm_file_cache
)
1271 call_void_hook(file_free_security
, file
);
1273 blob
= file
->f_security
;
1274 file
->f_security
= NULL
;
1275 kmem_cache_free(lsm_file_cache
, blob
);
1278 int security_file_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
)
1280 return call_int_hook(file_ioctl
, 0, file
, cmd
, arg
);
1283 static inline unsigned long mmap_prot(struct file
*file
, unsigned long prot
)
1286 * Does we have PROT_READ and does the application expect
1287 * it to imply PROT_EXEC? If not, nothing to talk about...
1289 if ((prot
& (PROT_READ
| PROT_EXEC
)) != PROT_READ
)
1291 if (!(current
->personality
& READ_IMPLIES_EXEC
))
1294 * if that's an anonymous mapping, let it.
1297 return prot
| PROT_EXEC
;
1299 * ditto if it's not on noexec mount, except that on !MMU we need
1300 * NOMMU_MAP_EXEC (== VM_MAYEXEC) in this case
1302 if (!path_noexec(&file
->f_path
)) {
1304 if (file
->f_op
->mmap_capabilities
) {
1305 unsigned caps
= file
->f_op
->mmap_capabilities(file
);
1306 if (!(caps
& NOMMU_MAP_EXEC
))
1310 return prot
| PROT_EXEC
;
1312 /* anything on noexec mount won't get PROT_EXEC */
1316 int security_mmap_file(struct file
*file
, unsigned long prot
,
1317 unsigned long flags
)
1320 ret
= call_int_hook(mmap_file
, 0, file
, prot
,
1321 mmap_prot(file
, prot
), flags
);
1324 return ima_file_mmap(file
, prot
);
1326 EXPORT_SYMBOL_GPL(security_mmap_file
);
1328 int security_mmap_addr(unsigned long addr
)
1330 return call_int_hook(mmap_addr
, 0, addr
);
1333 int security_file_mprotect(struct vm_area_struct
*vma
, unsigned long reqprot
,
1336 return call_int_hook(file_mprotect
, 0, vma
, reqprot
, prot
);
1339 int security_file_lock(struct file
*file
, unsigned int cmd
)
1341 return call_int_hook(file_lock
, 0, file
, cmd
);
1344 int security_file_fcntl(struct file
*file
, unsigned int cmd
, unsigned long arg
)
1346 return call_int_hook(file_fcntl
, 0, file
, cmd
, arg
);
1349 void security_file_set_fowner(struct file
*file
)
1351 call_void_hook(file_set_fowner
, file
);
1354 int security_file_send_sigiotask(struct task_struct
*tsk
,
1355 struct fown_struct
*fown
, int sig
)
1357 return call_int_hook(file_send_sigiotask
, 0, tsk
, fown
, sig
);
1360 int security_file_receive(struct file
*file
)
1362 return call_int_hook(file_receive
, 0, file
);
1365 int security_file_open(struct file
*file
, const struct cred
*cred
)
1369 ret
= call_int_hook(file_open
, 0, file
, cred
);
1373 return fsnotify_perm(file
, MAY_OPEN
);
1376 int security_task_alloc(struct task_struct
*task
, unsigned long clone_flags
)
1378 int rc
= lsm_task_alloc(task
);
1382 rc
= call_int_hook(task_alloc
, 0, task
, clone_flags
);
1384 security_task_free(task
);
1388 void security_task_free(struct task_struct
*task
)
1390 call_void_hook(task_free
, task
);
1392 kfree(task
->security
);
1393 task
->security
= NULL
;
1396 int security_cred_alloc_blank(struct cred
*cred
, gfp_t gfp
)
1398 int rc
= lsm_cred_alloc(cred
, gfp
);
1403 rc
= call_int_hook(cred_alloc_blank
, 0, cred
, gfp
);
1405 security_cred_free(cred
);
1409 void security_cred_free(struct cred
*cred
)
1411 call_void_hook(cred_free
, cred
);
1413 kfree(cred
->security
);
1414 cred
->security
= NULL
;
1417 int security_prepare_creds(struct cred
*new, const struct cred
*old
, gfp_t gfp
)
1419 int rc
= lsm_cred_alloc(new, gfp
);
1424 rc
= call_int_hook(cred_prepare
, 0, new, old
, gfp
);
1426 security_cred_free(new);
1430 void security_transfer_creds(struct cred
*new, const struct cred
*old
)
1432 call_void_hook(cred_transfer
, new, old
);
1435 int security_kernel_act_as(struct cred
*new, u32 secid
)
1437 return call_int_hook(kernel_act_as
, 0, new, secid
);
1440 int security_kernel_create_files_as(struct cred
*new, struct inode
*inode
)
1442 return call_int_hook(kernel_create_files_as
, 0, new, inode
);
1445 int security_kernel_module_request(char *kmod_name
)
1447 return call_int_hook(kernel_module_request
, 0, kmod_name
);
1450 int security_kernel_read_file(struct file
*file
, enum kernel_read_file_id id
)
1454 ret
= call_int_hook(kernel_read_file
, 0, file
, id
);
1457 return ima_read_file(file
, id
);
1459 EXPORT_SYMBOL_GPL(security_kernel_read_file
);
1461 int security_kernel_post_read_file(struct file
*file
, char *buf
, loff_t size
,
1462 enum kernel_read_file_id id
)
1466 ret
= call_int_hook(kernel_post_read_file
, 0, file
, buf
, size
, id
);
1469 return ima_post_read_file(file
, buf
, size
, id
);
1471 EXPORT_SYMBOL_GPL(security_kernel_post_read_file
);
1473 int security_task_fix_setuid(struct cred
*new, const struct cred
*old
,
1476 return call_int_hook(task_fix_setuid
, 0, new, old
, flags
);
1479 int security_task_setpgid(struct task_struct
*p
, pid_t pgid
)
1481 return call_int_hook(task_setpgid
, 0, p
, pgid
);
1484 int security_task_getpgid(struct task_struct
*p
)
1486 return call_int_hook(task_getpgid
, 0, p
);
1489 int security_task_getsid(struct task_struct
*p
)
1491 return call_int_hook(task_getsid
, 0, p
);
1494 void security_task_getsecid(struct task_struct
*p
, u32
*secid
)
1497 call_void_hook(task_getsecid
, p
, secid
);
1499 EXPORT_SYMBOL(security_task_getsecid
);
1501 int security_task_setnice(struct task_struct
*p
, int nice
)
1503 return call_int_hook(task_setnice
, 0, p
, nice
);
1506 int security_task_setioprio(struct task_struct
*p
, int ioprio
)
1508 return call_int_hook(task_setioprio
, 0, p
, ioprio
);
1511 int security_task_getioprio(struct task_struct
*p
)
1513 return call_int_hook(task_getioprio
, 0, p
);
1516 int security_task_prlimit(const struct cred
*cred
, const struct cred
*tcred
,
1519 return call_int_hook(task_prlimit
, 0, cred
, tcred
, flags
);
1522 int security_task_setrlimit(struct task_struct
*p
, unsigned int resource
,
1523 struct rlimit
*new_rlim
)
1525 return call_int_hook(task_setrlimit
, 0, p
, resource
, new_rlim
);
1528 int security_task_setscheduler(struct task_struct
*p
)
1530 return call_int_hook(task_setscheduler
, 0, p
);
1533 int security_task_getscheduler(struct task_struct
*p
)
1535 return call_int_hook(task_getscheduler
, 0, p
);
1538 int security_task_movememory(struct task_struct
*p
)
1540 return call_int_hook(task_movememory
, 0, p
);
1543 int security_task_kill(struct task_struct
*p
, struct siginfo
*info
,
1546 return call_int_hook(task_kill
, 0, p
, info
, sig
, secid
);
1549 int security_task_prctl(int option
, unsigned long arg2
, unsigned long arg3
,
1550 unsigned long arg4
, unsigned long arg5
)
1554 struct security_hook_list
*hp
;
1556 list_for_each_entry(hp
, &security_hook_heads
.task_prctl
, list
) {
1557 thisrc
= hp
->hook
.task_prctl(option
, arg2
, arg3
, arg4
, arg5
);
1558 if (thisrc
!= -ENOSYS
) {
1567 void security_task_to_inode(struct task_struct
*p
, struct inode
*inode
)
1569 call_void_hook(task_to_inode
, p
, inode
);
1572 int security_ipc_permission(struct kern_ipc_perm
*ipcp
, short flag
)
1574 return call_int_hook(ipc_permission
, 0, ipcp
, flag
);
1577 void security_ipc_getsecid(struct kern_ipc_perm
*ipcp
, u32
*secid
)
1580 call_void_hook(ipc_getsecid
, ipcp
, secid
);
1583 int security_msg_msg_alloc(struct msg_msg
*msg
)
1585 int rc
= lsm_msg_msg_alloc(msg
);
1589 rc
= call_int_hook(msg_msg_alloc_security
, 0, msg
);
1591 security_msg_msg_free(msg
);
1595 void security_msg_msg_free(struct msg_msg
*msg
)
1597 call_void_hook(msg_msg_free_security
, msg
);
1598 kfree(msg
->security
);
1599 msg
->security
= NULL
;
1602 int security_msg_queue_alloc(struct msg_queue
*msq
)
1604 int rc
= lsm_ipc_alloc(&msq
->q_perm
);
1608 rc
= call_int_hook(msg_queue_alloc_security
, 0, msq
);
1610 security_msg_queue_free(msq
);
1614 void security_msg_queue_free(struct msg_queue
*msq
)
1616 struct kern_ipc_perm
*kip
= &msq
->q_perm
;
1618 call_void_hook(msg_queue_free_security
, msq
);
1619 kfree(kip
->security
);
1620 kip
->security
= NULL
;
1623 int security_msg_queue_associate(struct msg_queue
*msq
, int msqflg
)
1625 return call_int_hook(msg_queue_associate
, 0, msq
, msqflg
);
1628 int security_msg_queue_msgctl(struct msg_queue
*msq
, int cmd
)
1630 return call_int_hook(msg_queue_msgctl
, 0, msq
, cmd
);
1633 int security_msg_queue_msgsnd(struct msg_queue
*msq
,
1634 struct msg_msg
*msg
, int msqflg
)
1636 return call_int_hook(msg_queue_msgsnd
, 0, msq
, msg
, msqflg
);
1639 int security_msg_queue_msgrcv(struct msg_queue
*msq
, struct msg_msg
*msg
,
1640 struct task_struct
*target
, long type
, int mode
)
1642 return call_int_hook(msg_queue_msgrcv
, 0, msq
, msg
, target
, type
, mode
);
1645 int security_shm_alloc(struct shmid_kernel
*shp
)
1647 int rc
= lsm_ipc_alloc(&shp
->shm_perm
);
1651 rc
= call_int_hook(shm_alloc_security
, 0, shp
);
1653 security_shm_free(shp
);
1657 void security_shm_free(struct shmid_kernel
*shp
)
1659 struct kern_ipc_perm
*kip
= &shp
->shm_perm
;
1661 call_void_hook(shm_free_security
, shp
);
1662 kfree(kip
->security
);
1663 kip
->security
= NULL
;
1666 int security_shm_associate(struct shmid_kernel
*shp
, int shmflg
)
1668 return call_int_hook(shm_associate
, 0, shp
, shmflg
);
1671 int security_shm_shmctl(struct shmid_kernel
*shp
, int cmd
)
1673 return call_int_hook(shm_shmctl
, 0, shp
, cmd
);
1676 int security_shm_shmat(struct shmid_kernel
*shp
, char __user
*shmaddr
, int shmflg
)
1678 return call_int_hook(shm_shmat
, 0, shp
, shmaddr
, shmflg
);
1681 int security_sem_alloc(struct sem_array
*sma
)
1683 int rc
= lsm_ipc_alloc(&sma
->sem_perm
);
1687 rc
= call_int_hook(sem_alloc_security
, 0, sma
);
1689 security_sem_free(sma
);
1693 void security_sem_free(struct sem_array
*sma
)
1695 struct kern_ipc_perm
*kip
= &sma
->sem_perm
;
1697 call_void_hook(sem_free_security
, sma
);
1698 kfree(kip
->security
);
1699 kip
->security
= NULL
;
1702 int security_sem_associate(struct sem_array
*sma
, int semflg
)
1704 return call_int_hook(sem_associate
, 0, sma
, semflg
);
1707 int security_sem_semctl(struct sem_array
*sma
, int cmd
)
1709 return call_int_hook(sem_semctl
, 0, sma
, cmd
);
1712 int security_sem_semop(struct sem_array
*sma
, struct sembuf
*sops
,
1713 unsigned nsops
, int alter
)
1715 return call_int_hook(sem_semop
, 0, sma
, sops
, nsops
, alter
);
1718 void security_d_instantiate(struct dentry
*dentry
, struct inode
*inode
)
1720 if (unlikely(inode
&& IS_PRIVATE(inode
)))
1722 call_void_hook(d_instantiate
, dentry
, inode
);
1724 EXPORT_SYMBOL(security_d_instantiate
);
1726 int security_getprocattr(struct task_struct
*p
, const char *lsm
, char *name
,
1729 struct security_hook_list
*hp
;
1731 list_for_each_entry(hp
, &security_hook_heads
.getprocattr
, list
) {
1732 if (lsm
!= NULL
&& strcmp(lsm
, hp
->lsm
))
1734 return hp
->hook
.getprocattr(p
, name
, value
);
1739 int security_setprocattr(const char *lsm
, const char *name
, void *value
,
1742 struct security_hook_list
*hp
;
1744 list_for_each_entry(hp
, &security_hook_heads
.setprocattr
, list
) {
1745 if (lsm
!= NULL
&& strcmp(lsm
, hp
->lsm
))
1747 return hp
->hook
.setprocattr(name
, value
, size
);
1752 int security_netlink_send(struct sock
*sk
, struct sk_buff
*skb
)
1754 return call_int_hook(netlink_send
, 0, sk
, skb
);
1757 int security_ismaclabel(const char *name
)
1759 return call_int_hook(ismaclabel
, 0, name
);
1761 EXPORT_SYMBOL(security_ismaclabel
);
1763 int security_secid_to_secctx(u32 secid
, char **secdata
, u32
*seclen
)
1765 return call_int_hook(secid_to_secctx
, -EOPNOTSUPP
, secid
, secdata
,
1768 EXPORT_SYMBOL(security_secid_to_secctx
);
1770 int security_secctx_to_secid(const char *secdata
, u32 seclen
, u32
*secid
)
1773 return call_int_hook(secctx_to_secid
, 0, secdata
, seclen
, secid
);
1775 EXPORT_SYMBOL(security_secctx_to_secid
);
1777 void security_release_secctx(char *secdata
, u32 seclen
)
1779 call_void_hook(release_secctx
, secdata
, seclen
);
1781 EXPORT_SYMBOL(security_release_secctx
);
1783 void security_inode_invalidate_secctx(struct inode
*inode
)
1785 call_void_hook(inode_invalidate_secctx
, inode
);
1787 EXPORT_SYMBOL(security_inode_invalidate_secctx
);
1789 int security_inode_notifysecctx(struct inode
*inode
, void *ctx
, u32 ctxlen
)
1791 return call_int_hook(inode_notifysecctx
, 0, inode
, ctx
, ctxlen
);
1793 EXPORT_SYMBOL(security_inode_notifysecctx
);
1795 int security_inode_setsecctx(struct dentry
*dentry
, void *ctx
, u32 ctxlen
)
1797 return call_int_hook(inode_setsecctx
, 0, dentry
, ctx
, ctxlen
);
1799 EXPORT_SYMBOL(security_inode_setsecctx
);
1801 int security_inode_getsecctx(struct inode
*inode
, void **ctx
, u32
*ctxlen
)
1803 return call_int_hook(inode_getsecctx
, -EOPNOTSUPP
, inode
, ctx
, ctxlen
);
1805 EXPORT_SYMBOL(security_inode_getsecctx
);
1807 #ifdef CONFIG_SECURITY_NETWORK
1809 int security_unix_stream_connect(struct sock
*sock
, struct sock
*other
, struct sock
*newsk
)
1811 return call_int_hook(unix_stream_connect
, 0, sock
, other
, newsk
);
1813 EXPORT_SYMBOL(security_unix_stream_connect
);
1815 int security_unix_may_send(struct socket
*sock
, struct socket
*other
)
1817 return call_int_hook(unix_may_send
, 0, sock
, other
);
1819 EXPORT_SYMBOL(security_unix_may_send
);
1821 int security_socket_create(int family
, int type
, int protocol
, int kern
)
1823 return call_int_hook(socket_create
, 0, family
, type
, protocol
, kern
);
1826 int security_socket_post_create(struct socket
*sock
, int family
,
1827 int type
, int protocol
, int kern
)
1829 return call_int_hook(socket_post_create
, 0, sock
, family
, type
,
1833 int security_socket_bind(struct socket
*sock
, struct sockaddr
*address
, int addrlen
)
1835 return call_int_hook(socket_bind
, 0, sock
, address
, addrlen
);
1838 int security_socket_connect(struct socket
*sock
, struct sockaddr
*address
, int addrlen
)
1840 return call_int_hook(socket_connect
, 0, sock
, address
, addrlen
);
1843 int security_socket_listen(struct socket
*sock
, int backlog
)
1845 return call_int_hook(socket_listen
, 0, sock
, backlog
);
1848 int security_socket_accept(struct socket
*sock
, struct socket
*newsock
)
1850 return call_int_hook(socket_accept
, 0, sock
, newsock
);
1853 int security_socket_sendmsg(struct socket
*sock
, struct msghdr
*msg
, int size
)
1855 return call_int_hook(socket_sendmsg
, 0, sock
, msg
, size
);
1858 int security_socket_recvmsg(struct socket
*sock
, struct msghdr
*msg
,
1859 int size
, int flags
)
1861 return call_int_hook(socket_recvmsg
, 0, sock
, msg
, size
, flags
);
1864 int security_socket_getsockname(struct socket
*sock
)
1866 return call_int_hook(socket_getsockname
, 0, sock
);
1869 int security_socket_getpeername(struct socket
*sock
)
1871 return call_int_hook(socket_getpeername
, 0, sock
);
1874 int security_socket_getsockopt(struct socket
*sock
, int level
, int optname
)
1876 return call_int_hook(socket_getsockopt
, 0, sock
, level
, optname
);
1879 int security_socket_setsockopt(struct socket
*sock
, int level
, int optname
)
1881 return call_int_hook(socket_setsockopt
, 0, sock
, level
, optname
);
1884 int security_socket_shutdown(struct socket
*sock
, int how
)
1886 return call_int_hook(socket_shutdown
, 0, sock
, how
);
1889 int security_sock_rcv_skb(struct sock
*sk
, struct sk_buff
*skb
)
1891 return call_int_hook(socket_sock_rcv_skb
, 0, sk
, skb
);
1893 EXPORT_SYMBOL(security_sock_rcv_skb
);
1895 int security_socket_getpeersec_stream(struct socket
*sock
, char __user
*optval
,
1896 int __user
*optlen
, unsigned len
)
1898 #ifdef CONFIG_SECURITY_STACKING
1899 struct security_hook_list
*hp
;
1900 char *lsm
= lsm_of_task(current
);
1902 list_for_each_entry(hp
, &security_hook_heads
.socket_getpeersec_stream
,
1904 if (!lsm
|| !lsm
[0] || !strcmp(lsm
, hp
->lsm
))
1905 return hp
->hook
.socket_getpeersec_stream(sock
, optval
,
1908 return -ENOPROTOOPT
;
1910 return call_int_hook(socket_getpeersec_stream
, -ENOPROTOOPT
, sock
,
1911 optval
, optlen
, len
);
1915 int security_socket_getpeersec_dgram(struct socket
*sock
, struct sk_buff
*skb
, u32
*secid
)
1917 return call_int_hook(socket_getpeersec_dgram
, -ENOPROTOOPT
, sock
,
1920 EXPORT_SYMBOL(security_socket_getpeersec_dgram
);
1922 int security_sk_alloc(struct sock
*sk
, int family
, gfp_t priority
)
1924 int rc
= lsm_sock_alloc(sk
, priority
);
1928 rc
= call_int_hook(sk_alloc_security
, 0, sk
, family
, priority
);
1930 security_sk_free(sk
);
1934 void security_sk_free(struct sock
*sk
)
1936 call_void_hook(sk_free_security
, sk
);
1937 kfree(sk
->sk_security
);
1938 sk
->sk_security
= NULL
;
1941 void security_sk_clone(const struct sock
*sk
, struct sock
*newsk
)
1943 call_void_hook(sk_clone_security
, sk
, newsk
);
1945 EXPORT_SYMBOL(security_sk_clone
);
1947 void security_sk_classify_flow(struct sock
*sk
, struct flowi
*fl
)
1949 call_void_hook(sk_getsecid
, sk
, &fl
->flowi_secid
);
1951 EXPORT_SYMBOL(security_sk_classify_flow
);
1953 void security_req_classify_flow(const struct request_sock
*req
, struct flowi
*fl
)
1955 call_void_hook(req_classify_flow
, req
, fl
);
1957 EXPORT_SYMBOL(security_req_classify_flow
);
1959 void security_sock_graft(struct sock
*sk
, struct socket
*parent
)
1961 call_void_hook(sock_graft
, sk
, parent
);
1963 EXPORT_SYMBOL(security_sock_graft
);
1965 int security_inet_conn_request(struct sock
*sk
,
1966 struct sk_buff
*skb
, struct request_sock
*req
)
1968 return call_int_hook(inet_conn_request
, 0, sk
, skb
, req
);
1970 EXPORT_SYMBOL(security_inet_conn_request
);
1972 void security_inet_csk_clone(struct sock
*newsk
,
1973 const struct request_sock
*req
)
1975 call_void_hook(inet_csk_clone
, newsk
, req
);
1978 void security_inet_conn_established(struct sock
*sk
,
1979 struct sk_buff
*skb
)
1981 call_void_hook(inet_conn_established
, sk
, skb
);
1984 int security_secmark_relabel_packet(u32 secid
)
1986 return call_int_hook(secmark_relabel_packet
, 0, secid
);
1988 EXPORT_SYMBOL(security_secmark_relabel_packet
);
1990 void security_secmark_refcount_inc(void)
1992 call_void_hook(secmark_refcount_inc
);
1994 EXPORT_SYMBOL(security_secmark_refcount_inc
);
1996 void security_secmark_refcount_dec(void)
1998 call_void_hook(secmark_refcount_dec
);
2000 EXPORT_SYMBOL(security_secmark_refcount_dec
);
2002 int security_tun_dev_alloc_security(void **security
)
2004 return call_int_hook(tun_dev_alloc_security
, 0, security
);
2006 EXPORT_SYMBOL(security_tun_dev_alloc_security
);
2008 void security_tun_dev_free_security(void *security
)
2010 call_void_hook(tun_dev_free_security
, security
);
2012 EXPORT_SYMBOL(security_tun_dev_free_security
);
2014 int security_tun_dev_create(void)
2016 return call_int_hook(tun_dev_create
, 0);
2018 EXPORT_SYMBOL(security_tun_dev_create
);
2020 int security_tun_dev_attach_queue(void *security
)
2022 return call_int_hook(tun_dev_attach_queue
, 0, security
);
2024 EXPORT_SYMBOL(security_tun_dev_attach_queue
);
2026 int security_tun_dev_attach(struct sock
*sk
, void *security
)
2028 return call_int_hook(tun_dev_attach
, 0, sk
, security
);
2030 EXPORT_SYMBOL(security_tun_dev_attach
);
2032 int security_tun_dev_open(void *security
)
2034 return call_int_hook(tun_dev_open
, 0, security
);
2036 EXPORT_SYMBOL(security_tun_dev_open
);
2038 #endif /* CONFIG_SECURITY_NETWORK */
2040 #ifdef CONFIG_SECURITY_INFINIBAND
2042 int security_ib_pkey_access(void *sec
, u64 subnet_prefix
, u16 pkey
)
2044 return call_int_hook(ib_pkey_access
, 0, sec
, subnet_prefix
, pkey
);
2046 EXPORT_SYMBOL(security_ib_pkey_access
);
2048 int security_ib_endport_manage_subnet(void *sec
, const char *dev_name
, u8 port_num
)
2050 return call_int_hook(ib_endport_manage_subnet
, 0, sec
, dev_name
, port_num
);
2052 EXPORT_SYMBOL(security_ib_endport_manage_subnet
);
2054 int security_ib_alloc_security(void **sec
)
2056 return call_int_hook(ib_alloc_security
, 0, sec
);
2058 EXPORT_SYMBOL(security_ib_alloc_security
);
2060 void security_ib_free_security(void *sec
)
2062 call_void_hook(ib_free_security
, sec
);
2064 EXPORT_SYMBOL(security_ib_free_security
);
2065 #endif /* CONFIG_SECURITY_INFINIBAND */
2067 #ifdef CONFIG_SECURITY_NETWORK_XFRM
2069 int security_xfrm_policy_alloc(struct xfrm_sec_ctx
**ctxp
,
2070 struct xfrm_user_sec_ctx
*sec_ctx
,
2073 return call_int_hook(xfrm_policy_alloc_security
, 0, ctxp
, sec_ctx
, gfp
);
2075 EXPORT_SYMBOL(security_xfrm_policy_alloc
);
2077 int security_xfrm_policy_clone(struct xfrm_sec_ctx
*old_ctx
,
2078 struct xfrm_sec_ctx
**new_ctxp
)
2080 return call_int_hook(xfrm_policy_clone_security
, 0, old_ctx
, new_ctxp
);
2083 void security_xfrm_policy_free(struct xfrm_sec_ctx
*ctx
)
2085 call_void_hook(xfrm_policy_free_security
, ctx
);
2087 EXPORT_SYMBOL(security_xfrm_policy_free
);
2089 int security_xfrm_policy_delete(struct xfrm_sec_ctx
*ctx
)
2091 return call_int_hook(xfrm_policy_delete_security
, 0, ctx
);
2094 int security_xfrm_state_alloc(struct xfrm_state
*x
,
2095 struct xfrm_user_sec_ctx
*sec_ctx
)
2097 return call_int_hook(xfrm_state_alloc
, 0, x
, sec_ctx
);
2099 EXPORT_SYMBOL(security_xfrm_state_alloc
);
2101 int security_xfrm_state_alloc_acquire(struct xfrm_state
*x
,
2102 struct xfrm_sec_ctx
*polsec
, u32 secid
)
2104 return call_int_hook(xfrm_state_alloc_acquire
, 0, x
, polsec
, secid
);
2107 int security_xfrm_state_delete(struct xfrm_state
*x
)
2109 return call_int_hook(xfrm_state_delete_security
, 0, x
);
2111 EXPORT_SYMBOL(security_xfrm_state_delete
);
2113 void security_xfrm_state_free(struct xfrm_state
*x
)
2115 call_void_hook(xfrm_state_free_security
, x
);
2118 int security_xfrm_policy_lookup(struct xfrm_sec_ctx
*ctx
, u32 fl_secid
, u8 dir
)
2120 return call_int_hook(xfrm_policy_lookup
, 0, ctx
, fl_secid
, dir
);
2123 int security_xfrm_state_pol_flow_match(struct xfrm_state
*x
,
2124 struct xfrm_policy
*xp
,
2125 const struct flowi
*fl
)
2127 struct security_hook_list
*hp
;
2131 * Since this function is expected to return 0 or 1, the judgment
2132 * becomes difficult if multiple LSMs supply this call. Fortunately,
2133 * we can use the first LSM's judgment because currently only SELinux
2134 * supplies this call.
2136 * For speed optimization, we explicitly break the loop rather than
2139 list_for_each_entry(hp
, &security_hook_heads
.xfrm_state_pol_flow_match
,
2141 rc
= hp
->hook
.xfrm_state_pol_flow_match(x
, xp
, fl
);
2147 int security_xfrm_decode_session(struct sk_buff
*skb
, u32
*secid
)
2149 return call_int_hook(xfrm_decode_session
, 0, skb
, secid
, 1);
2152 void security_skb_classify_flow(struct sk_buff
*skb
, struct flowi
*fl
)
2154 int rc
= call_int_hook(xfrm_decode_session
, 0, skb
, &fl
->flowi_secid
,
2159 EXPORT_SYMBOL(security_skb_classify_flow
);
2161 #endif /* CONFIG_SECURITY_NETWORK_XFRM */
2165 int security_key_alloc(struct key
*key
, const struct cred
*cred
,
2166 unsigned long flags
)
2168 int rc
= lsm_key_alloc(key
);
2172 rc
= call_int_hook(key_alloc
, 0, key
, cred
, flags
);
2174 security_key_free(key
);
2178 void security_key_free(struct key
*key
)
2180 call_void_hook(key_free
, key
);
2181 kfree(key
->security
);
2182 key
->security
= NULL
;
2185 int security_key_permission(key_ref_t key_ref
,
2186 const struct cred
*cred
, unsigned perm
)
2188 return call_int_hook(key_permission
, 0, key_ref
, cred
, perm
);
2191 int security_key_getsecurity(struct key
*key
, char **_buffer
)
2194 return call_int_hook(key_getsecurity
, 0, key
, _buffer
);
2197 #endif /* CONFIG_KEYS */
2201 int security_audit_rule_init(u32 field
, u32 op
, char *rulestr
, void **lsmrule
)
2203 return call_int_hook(audit_rule_init
, 0, field
, op
, rulestr
, lsmrule
);
2206 int security_audit_rule_known(struct audit_krule
*krule
)
2208 return call_int_hook(audit_rule_known
, 0, krule
);
2211 void security_audit_rule_free(void *lsmrule
)
2213 call_void_hook(audit_rule_free
, lsmrule
);
2216 int security_audit_rule_match(u32 secid
, u32 field
, u32 op
, void *lsmrule
,
2217 struct audit_context
*actx
)
2219 return call_int_hook(audit_rule_match
, 0, secid
, field
, op
, lsmrule
,
2222 #endif /* CONFIG_AUDIT */
2224 #ifdef CONFIG_BPF_SYSCALL
2225 int security_bpf(int cmd
, union bpf_attr
*attr
, unsigned int size
)
2227 return call_int_hook(bpf
, 0, cmd
, attr
, size
);
2229 int security_bpf_map(struct bpf_map
*map
, fmode_t fmode
)
2231 return call_int_hook(bpf_map
, 0, map
, fmode
);
2233 int security_bpf_prog(struct bpf_prog
*prog
)
2235 return call_int_hook(bpf_prog
, 0, prog
);
2237 int security_bpf_map_alloc(struct bpf_map
*map
)
2239 return call_int_hook(bpf_map_alloc_security
, 0, map
);
2241 int security_bpf_prog_alloc(struct bpf_prog_aux
*aux
)
2243 return call_int_hook(bpf_prog_alloc_security
, 0, aux
);
2245 void security_bpf_map_free(struct bpf_map
*map
)
2247 call_void_hook(bpf_map_free_security
, map
);
2249 void security_bpf_prog_free(struct bpf_prog_aux
*aux
)
2251 call_void_hook(bpf_prog_free_security
, aux
);
2253 #endif /* CONFIG_BPF_SYSCALL */