1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Security plug functions
5 * Copyright (C) 2001 WireX Communications, Inc <chris@wirex.com>
6 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
7 * Copyright (C) 2001 Networks Associates Technology, Inc <ssmalley@nai.com>
8 * Copyright (C) 2016 Mellanox Technologies
11 #define pr_fmt(fmt) "LSM: " fmt
13 #include <linux/bpf.h>
14 #include <linux/capability.h>
15 #include <linux/dcache.h>
16 #include <linux/export.h>
17 #include <linux/init.h>
18 #include <linux/kernel.h>
19 #include <linux/kernel_read_file.h>
20 #include <linux/lsm_hooks.h>
21 #include <linux/integrity.h>
22 #include <linux/ima.h>
23 #include <linux/evm.h>
24 #include <linux/fsnotify.h>
25 #include <linux/mman.h>
26 #include <linux/mount.h>
27 #include <linux/personality.h>
28 #include <linux/backing-dev.h>
29 #include <linux/string.h>
30 #include <linux/msg.h>
34 #define MAX_LSM_EVM_XATTR 2
36 /* How many LSMs were built into the kernel? */
37 #define LSM_COUNT (__end_lsm_info - __start_lsm_info)
40 * These are descriptions of the reasons that can be passed to the
41 * security_locked_down() LSM hook. Placing this array here allows
42 * all security modules to use the same descriptions for auditing
45 const char *const lockdown_reasons
[LOCKDOWN_CONFIDENTIALITY_MAX
+1] = {
46 [LOCKDOWN_NONE
] = "none",
47 [LOCKDOWN_MODULE_SIGNATURE
] = "unsigned module loading",
48 [LOCKDOWN_DEV_MEM
] = "/dev/mem,kmem,port",
49 [LOCKDOWN_EFI_TEST
] = "/dev/efi_test access",
50 [LOCKDOWN_KEXEC
] = "kexec of unsigned images",
51 [LOCKDOWN_HIBERNATION
] = "hibernation",
52 [LOCKDOWN_PCI_ACCESS
] = "direct PCI access",
53 [LOCKDOWN_IOPORT
] = "raw io port access",
54 [LOCKDOWN_MSR
] = "raw MSR access",
55 [LOCKDOWN_ACPI_TABLES
] = "modifying ACPI tables",
56 [LOCKDOWN_PCMCIA_CIS
] = "direct PCMCIA CIS storage",
57 [LOCKDOWN_TIOCSSERIAL
] = "reconfiguration of serial port IO",
58 [LOCKDOWN_MODULE_PARAMETERS
] = "unsafe module parameters",
59 [LOCKDOWN_MMIOTRACE
] = "unsafe mmio",
60 [LOCKDOWN_DEBUGFS
] = "debugfs access",
61 [LOCKDOWN_XMON_WR
] = "xmon write access",
62 [LOCKDOWN_INTEGRITY_MAX
] = "integrity",
63 [LOCKDOWN_KCORE
] = "/proc/kcore access",
64 [LOCKDOWN_KPROBES
] = "use of kprobes",
65 [LOCKDOWN_BPF_READ
] = "use of bpf to read kernel RAM",
66 [LOCKDOWN_PERF
] = "unsafe use of perf",
67 [LOCKDOWN_TRACEFS
] = "use of tracefs",
68 [LOCKDOWN_XMON_RW
] = "xmon read and write access",
69 [LOCKDOWN_XFRM_SECRET
] = "xfrm SA secret",
70 [LOCKDOWN_CONFIDENTIALITY_MAX
] = "confidentiality",
73 struct security_hook_heads security_hook_heads __lsm_ro_after_init
;
74 static BLOCKING_NOTIFIER_HEAD(blocking_lsm_notifier_chain
);
76 static struct kmem_cache
*lsm_file_cache
;
77 static struct kmem_cache
*lsm_inode_cache
;
82 * The task blob includes the "display" slot used for
83 * chosing which module presents contexts.
85 static struct lsm_blob_sizes blob_sizes __lsm_ro_after_init
= {
86 .lbs_task
= sizeof(int),
89 /* Boot-time LSM user choice */
90 static __initdata
const char *chosen_lsm_order
;
91 static __initdata
const char *chosen_major_lsm
;
93 static __initconst
const char * const builtin_lsm_order
= CONFIG_LSM
;
95 /* Ordered list of LSMs to initialize. */
96 static __initdata
struct lsm_info
**ordered_lsms
;
97 static __initdata
struct lsm_info
*exclusive
;
99 static __initdata
bool debug
;
100 #define init_debug(...) \
103 pr_info(__VA_ARGS__); \
106 static bool __init
is_enabled(struct lsm_info
*lsm
)
111 return *lsm
->enabled
;
114 /* Mark an LSM's enabled flag. */
115 static int lsm_enabled_true __initdata
= 1;
116 static int lsm_enabled_false __initdata
= 0;
117 static void __init
set_enabled(struct lsm_info
*lsm
, bool enabled
)
120 * When an LSM hasn't configured an enable variable, we can use
121 * a hard-coded location for storing the default enabled state.
125 lsm
->enabled
= &lsm_enabled_true
;
127 lsm
->enabled
= &lsm_enabled_false
;
128 } else if (lsm
->enabled
== &lsm_enabled_true
) {
130 lsm
->enabled
= &lsm_enabled_false
;
131 } else if (lsm
->enabled
== &lsm_enabled_false
) {
133 lsm
->enabled
= &lsm_enabled_true
;
135 *lsm
->enabled
= enabled
;
139 /* Is an LSM already listed in the ordered LSMs list? */
140 static bool __init
exists_ordered_lsm(struct lsm_info
*lsm
)
142 struct lsm_info
**check
;
144 for (check
= ordered_lsms
; *check
; check
++)
151 /* Append an LSM to the list of ordered LSMs to initialize. */
152 static int last_lsm __initdata
;
153 static void __init
append_ordered_lsm(struct lsm_info
*lsm
, const char *from
)
155 /* Ignore duplicate selections. */
156 if (exists_ordered_lsm(lsm
))
159 if (WARN(last_lsm
== LSM_COUNT
, "%s: out of LSM slots!?\n", from
))
162 /* Enable this LSM, if it is not already set. */
164 lsm
->enabled
= &lsm_enabled_true
;
165 ordered_lsms
[last_lsm
++] = lsm
;
167 init_debug("%s ordering: %s (%sabled)\n", from
, lsm
->name
,
168 is_enabled(lsm
) ? "en" : "dis");
171 /* Is an LSM allowed to be initialized? */
172 static bool __init
lsm_allowed(struct lsm_info
*lsm
)
174 /* Skip if the LSM is disabled. */
175 if (!is_enabled(lsm
))
178 /* Not allowed if another exclusive LSM already initialized. */
179 if ((lsm
->flags
& LSM_FLAG_EXCLUSIVE
) && exclusive
) {
180 init_debug("exclusive disabled: %s\n", lsm
->name
);
187 static void __init
lsm_set_blob_size(int *need
, int *lbs
)
198 static void __init
lsm_set_blob_sizes(struct lsm_blob_sizes
*needed
)
203 lsm_set_blob_size(&needed
->lbs_cred
, &blob_sizes
.lbs_cred
);
204 lsm_set_blob_size(&needed
->lbs_file
, &blob_sizes
.lbs_file
);
206 * The inode blob gets an rcu_head in addition to
207 * what the modules might need.
209 if (needed
->lbs_inode
&& blob_sizes
.lbs_inode
== 0)
210 blob_sizes
.lbs_inode
= sizeof(struct rcu_head
);
211 lsm_set_blob_size(&needed
->lbs_inode
, &blob_sizes
.lbs_inode
);
212 lsm_set_blob_size(&needed
->lbs_ipc
, &blob_sizes
.lbs_ipc
);
213 lsm_set_blob_size(&needed
->lbs_msg_msg
, &blob_sizes
.lbs_msg_msg
);
214 lsm_set_blob_size(&needed
->lbs_sock
, &blob_sizes
.lbs_sock
);
215 lsm_set_blob_size(&needed
->lbs_task
, &blob_sizes
.lbs_task
);
218 /* Prepare LSM for initialization. */
219 static void __init
prepare_lsm(struct lsm_info
*lsm
)
221 int enabled
= lsm_allowed(lsm
);
223 /* Record enablement (to handle any following exclusive LSMs). */
224 set_enabled(lsm
, enabled
);
226 /* If enabled, do pre-initialization work. */
228 if ((lsm
->flags
& LSM_FLAG_EXCLUSIVE
) && !exclusive
) {
230 init_debug("exclusive chosen: %s\n", lsm
->name
);
233 lsm_set_blob_sizes(lsm
->blobs
);
237 /* Initialize a given LSM, if it is enabled. */
238 static void __init
initialize_lsm(struct lsm_info
*lsm
)
240 if (is_enabled(lsm
)) {
243 init_debug("initializing %s\n", lsm
->name
);
245 WARN(ret
, "%s failed to initialize: %d\n", lsm
->name
, ret
);
249 /* Populate ordered LSMs list from comma-separated LSM name list. */
250 static void __init
ordered_lsm_parse(const char *order
, const char *origin
)
252 struct lsm_info
*lsm
;
253 char *sep
, *name
, *next
;
255 /* LSM_ORDER_FIRST is always first. */
256 for (lsm
= __start_lsm_info
; lsm
< __end_lsm_info
; lsm
++) {
257 if (lsm
->order
== LSM_ORDER_FIRST
)
258 append_ordered_lsm(lsm
, "first");
261 /* Process "security=", if given. */
262 if (chosen_major_lsm
) {
263 struct lsm_info
*major
;
266 * To match the original "security=" behavior, this
267 * explicitly does NOT fallback to another Legacy Major
268 * if the selected one was separately disabled: disable
269 * all non-matching Legacy Major LSMs.
271 for (major
= __start_lsm_info
; major
< __end_lsm_info
;
273 if ((major
->flags
& LSM_FLAG_LEGACY_MAJOR
) &&
274 strcmp(major
->name
, chosen_major_lsm
) != 0) {
275 set_enabled(major
, false);
276 init_debug("security=%s disabled: %s\n",
277 chosen_major_lsm
, major
->name
);
282 sep
= kstrdup(order
, GFP_KERNEL
);
284 /* Walk the list, looking for matching LSMs. */
285 while ((name
= strsep(&next
, ",")) != NULL
) {
288 for (lsm
= __start_lsm_info
; lsm
< __end_lsm_info
; lsm
++) {
289 if (lsm
->order
== LSM_ORDER_MUTABLE
&&
290 strcmp(lsm
->name
, name
) == 0) {
291 append_ordered_lsm(lsm
, origin
);
297 init_debug("%s ignored: %s\n", origin
, name
);
300 /* Process "security=", if given. */
301 if (chosen_major_lsm
) {
302 for (lsm
= __start_lsm_info
; lsm
< __end_lsm_info
; lsm
++) {
303 if (exists_ordered_lsm(lsm
))
305 if (strcmp(lsm
->name
, chosen_major_lsm
) == 0)
306 append_ordered_lsm(lsm
, "security=");
310 /* Disable all LSMs not in the ordered list. */
311 for (lsm
= __start_lsm_info
; lsm
< __end_lsm_info
; lsm
++) {
312 if (exists_ordered_lsm(lsm
))
314 set_enabled(lsm
, false);
315 init_debug("%s disabled: %s\n", origin
, lsm
->name
);
321 static void __init
lsm_early_cred(struct cred
*cred
);
322 static void __init
lsm_early_task(struct task_struct
*task
);
324 static int lsm_append(const char *new, char **result
);
326 static void __init
ordered_lsm_init(void)
328 struct lsm_info
**lsm
;
330 ordered_lsms
= kcalloc(LSM_COUNT
+ 1, sizeof(*ordered_lsms
),
333 if (chosen_lsm_order
) {
334 if (chosen_major_lsm
) {
335 pr_info("security= is ignored because it is superseded by lsm=\n");
336 chosen_major_lsm
= NULL
;
338 ordered_lsm_parse(chosen_lsm_order
, "cmdline");
340 ordered_lsm_parse(builtin_lsm_order
, "builtin");
342 for (lsm
= ordered_lsms
; *lsm
; lsm
++)
345 init_debug("cred blob size = %d\n", blob_sizes
.lbs_cred
);
346 init_debug("file blob size = %d\n", blob_sizes
.lbs_file
);
347 init_debug("inode blob size = %d\n", blob_sizes
.lbs_inode
);
348 init_debug("ipc blob size = %d\n", blob_sizes
.lbs_ipc
);
349 init_debug("msg_msg blob size = %d\n", blob_sizes
.lbs_msg_msg
);
350 init_debug("sock blob size = %d\n", blob_sizes
.lbs_sock
);
351 init_debug("task blob size = %d\n", blob_sizes
.lbs_task
);
352 init_debug("lsmblob size = %zu\n", sizeof(struct lsmblob
));
355 * Create any kmem_caches needed for blobs
357 if (blob_sizes
.lbs_file
)
358 lsm_file_cache
= kmem_cache_create("lsm_file_cache",
359 blob_sizes
.lbs_file
, 0,
361 if (blob_sizes
.lbs_inode
)
362 lsm_inode_cache
= kmem_cache_create("lsm_inode_cache",
363 blob_sizes
.lbs_inode
, 0,
366 lsm_early_cred((struct cred
*) current
->cred
);
367 lsm_early_task(current
);
368 for (lsm
= ordered_lsms
; *lsm
; lsm
++)
369 initialize_lsm(*lsm
);
374 int __init
early_security_init(void)
377 struct hlist_head
*list
= (struct hlist_head
*) &security_hook_heads
;
378 struct lsm_info
*lsm
;
380 for (i
= 0; i
< sizeof(security_hook_heads
) / sizeof(struct hlist_head
);
382 INIT_HLIST_HEAD(&list
[i
]);
384 for (lsm
= __start_early_lsm_info
; lsm
< __end_early_lsm_info
; lsm
++) {
386 lsm
->enabled
= &lsm_enabled_true
;
395 * security_init - initializes the security framework
397 * This should be called early in the kernel initialization sequence.
399 int __init
security_init(void)
401 struct lsm_info
*lsm
;
403 pr_info("Security Framework initializing\n");
406 * Append the names of the early LSM modules now that kmalloc() is
409 for (lsm
= __start_early_lsm_info
; lsm
< __end_early_lsm_info
; lsm
++) {
411 lsm_append(lsm
->name
, &lsm_names
);
414 /* Load LSMs in specified order. */
420 /* Save user chosen LSM */
421 static int __init
choose_major_lsm(char *str
)
423 chosen_major_lsm
= str
;
426 __setup("security=", choose_major_lsm
);
428 /* Explicitly choose LSM initialization order. */
429 static int __init
choose_lsm_order(char *str
)
431 chosen_lsm_order
= str
;
434 __setup("lsm=", choose_lsm_order
);
436 /* Enable LSM order debugging. */
437 static int __init
enable_debug(char *str
)
442 __setup("lsm.debug", enable_debug
);
444 static bool match_last_lsm(const char *list
, const char *lsm
)
448 if (WARN_ON(!list
|| !lsm
))
450 last
= strrchr(list
, ',');
452 /* Pass the comma, strcmp() will check for '\0' */
456 return !strcmp(last
, lsm
);
459 static int lsm_append(const char *new, char **result
)
463 if (*result
== NULL
) {
464 *result
= kstrdup(new, GFP_KERNEL
);
468 /* Check if it is the last registered name */
469 if (match_last_lsm(*result
, new))
471 cp
= kasprintf(GFP_KERNEL
, "%s,%s", *result
, new);
481 * Current index to use while initializing the lsmblob secid list.
482 * Pointers to the LSM id structures for local use.
484 static int lsm_slot __lsm_ro_after_init
;
485 static struct lsm_id
*lsm_slotlist
[LSMBLOB_ENTRIES
] __lsm_ro_after_init
;
488 * security_lsm_slot_name - Get the name of the security module in a slot
489 * @slot: index into the "display" slot list.
491 * Provide the name of the security module associated with
494 * If @slot is LSMBLOB_INVALID return the value
495 * for slot 0 if it has been set, otherwise NULL.
497 * Returns a pointer to the name string or NULL.
499 const char *security_lsm_slot_name(int slot
)
501 if (slot
== LSMBLOB_INVALID
)
503 else if (slot
>= LSMBLOB_ENTRIES
|| slot
< 0)
506 if (lsm_slotlist
[slot
] == NULL
)
508 return lsm_slotlist
[slot
]->lsm
;
512 * security_add_hooks - Add a modules hooks to the hook lists.
513 * @hooks: the hooks to add
514 * @count: the number of hooks to add
515 * @lsmid: the the identification information for the security module
517 * Each LSM has to register its hooks with the infrastructure.
518 * If the LSM is using hooks that export secids allocate a slot
519 * for it in the lsmblob.
521 void __init
security_add_hooks(struct security_hook_list
*hooks
, int count
,
522 struct lsm_id
*lsmid
)
526 if (lsmid
->slot
== LSMBLOB_NEEDED
) {
527 if (lsm_slot
>= LSMBLOB_ENTRIES
)
528 panic("%s Too many LSMs registered.\n", __func__
);
529 lsm_slotlist
[lsm_slot
] = lsmid
;
530 lsmid
->slot
= lsm_slot
++;
531 init_debug("%s assigned lsmblob slot %d\n", lsmid
->lsm
,
535 for (i
= 0; i
< count
; i
++) {
536 hooks
[i
].lsmid
= lsmid
;
537 hlist_add_tail_rcu(&hooks
[i
].list
, hooks
[i
].head
);
541 * Don't try to append during early_security_init(), we'll come back
542 * and fix this up afterwards.
544 if (slab_is_available()) {
545 if (lsm_append(lsmid
->lsm
, &lsm_names
) < 0)
546 panic("%s - Cannot get early memory.\n", __func__
);
550 int call_blocking_lsm_notifier(enum lsm_event event
, void *data
)
552 return blocking_notifier_call_chain(&blocking_lsm_notifier_chain
,
555 EXPORT_SYMBOL(call_blocking_lsm_notifier
);
557 int register_blocking_lsm_notifier(struct notifier_block
*nb
)
559 return blocking_notifier_chain_register(&blocking_lsm_notifier_chain
,
562 EXPORT_SYMBOL(register_blocking_lsm_notifier
);
564 int unregister_blocking_lsm_notifier(struct notifier_block
*nb
)
566 return blocking_notifier_chain_unregister(&blocking_lsm_notifier_chain
,
569 EXPORT_SYMBOL(unregister_blocking_lsm_notifier
);
572 * lsm_cred_alloc - allocate a composite cred blob
573 * @cred: the cred that needs a blob
574 * @gfp: allocation type
576 * Allocate the cred blob for all the modules
578 * Returns 0, or -ENOMEM if memory can't be allocated.
580 static int lsm_cred_alloc(struct cred
*cred
, gfp_t gfp
)
582 if (blob_sizes
.lbs_cred
== 0) {
583 cred
->security
= NULL
;
587 cred
->security
= kzalloc(blob_sizes
.lbs_cred
, gfp
);
588 if (cred
->security
== NULL
)
594 * lsm_early_cred - during initialization allocate a composite cred blob
595 * @cred: the cred that needs a blob
597 * Allocate the cred blob for all the modules
599 static void __init
lsm_early_cred(struct cred
*cred
)
601 int rc
= lsm_cred_alloc(cred
, GFP_KERNEL
);
604 panic("%s: Early cred alloc failed.\n", __func__
);
608 * lsm_file_alloc - allocate a composite file blob
609 * @file: the file that needs a blob
611 * Allocate the file blob for all the modules
613 * Returns 0, or -ENOMEM if memory can't be allocated.
615 static int lsm_file_alloc(struct file
*file
)
617 if (!lsm_file_cache
) {
618 file
->f_security
= NULL
;
622 file
->f_security
= kmem_cache_zalloc(lsm_file_cache
, GFP_KERNEL
);
623 if (file
->f_security
== NULL
)
629 * lsm_inode_alloc - allocate a composite inode blob
630 * @inode: the inode that needs a blob
632 * Allocate the inode blob for all the modules
634 * Returns 0, or -ENOMEM if memory can't be allocated.
636 int lsm_inode_alloc(struct inode
*inode
)
638 if (!lsm_inode_cache
) {
639 inode
->i_security
= NULL
;
643 inode
->i_security
= kmem_cache_zalloc(lsm_inode_cache
, GFP_NOFS
);
644 if (inode
->i_security
== NULL
)
650 * lsm_task_alloc - allocate a composite task blob
651 * @task: the task that needs a blob
653 * Allocate the task blob for all the modules
655 * Returns 0, or -ENOMEM if memory can't be allocated.
657 static int lsm_task_alloc(struct task_struct
*task
)
661 if (blob_sizes
.lbs_task
== 0) {
662 task
->security
= NULL
;
666 task
->security
= kzalloc(blob_sizes
.lbs_task
, GFP_KERNEL
);
667 if (task
->security
== NULL
)
671 * The start of the task blob contains the "display" LSM slot number.
672 * Start with it set to the invalid slot number, indicating that the
673 * default first registered LSM be displayed.
675 display
= task
->security
;
676 *display
= LSMBLOB_INVALID
;
682 * lsm_ipc_alloc - allocate a composite ipc blob
683 * @kip: the ipc that needs a blob
685 * Allocate the ipc blob for all the modules
687 * Returns 0, or -ENOMEM if memory can't be allocated.
689 static int lsm_ipc_alloc(struct kern_ipc_perm
*kip
)
691 if (blob_sizes
.lbs_ipc
== 0) {
692 kip
->security
= NULL
;
696 kip
->security
= kzalloc(blob_sizes
.lbs_ipc
, GFP_KERNEL
);
697 if (kip
->security
== NULL
)
703 * lsm_msg_msg_alloc - allocate a composite msg_msg blob
704 * @mp: the msg_msg that needs a blob
706 * Allocate the ipc blob for all the modules
708 * Returns 0, or -ENOMEM if memory can't be allocated.
710 static int lsm_msg_msg_alloc(struct msg_msg
*mp
)
712 if (blob_sizes
.lbs_msg_msg
== 0) {
717 mp
->security
= kzalloc(blob_sizes
.lbs_msg_msg
, GFP_KERNEL
);
718 if (mp
->security
== NULL
)
724 * lsm_sock_alloc - allocate a composite sock blob
725 * @sock: the sock that needs a blob
726 * @priority: allocation mode
728 * Allocate the sock blob for all the modules
730 * Returns 0, or -ENOMEM if memory can't be allocated.
732 static int lsm_sock_alloc(struct sock
*sock
, gfp_t priority
)
734 if (blob_sizes
.lbs_sock
== 0) {
735 sock
->sk_security
= NULL
;
739 sock
->sk_security
= kzalloc(blob_sizes
.lbs_sock
, priority
);
740 if (sock
->sk_security
== NULL
)
746 * lsm_early_task - during initialization allocate a composite task blob
747 * @task: the task that needs a blob
749 * Allocate the task blob for all the modules
751 static void __init
lsm_early_task(struct task_struct
*task
)
753 int rc
= lsm_task_alloc(task
);
756 panic("%s: Early task alloc failed.\n", __func__
);
760 * append_ctx - append a lsm/context pair to a compound context
761 * @ctx: the existing compound context
762 * @ctxlen: size of the old context, including terminating nul byte
763 * @lsm: new lsm name, nul terminated
764 * @new: new context, possibly nul terminated
765 * @newlen: maximum size of @new
767 * replace @ctx with a new compound context, appending @newlsm and @new
768 * to @ctx. On exit the new data replaces the old, which is freed.
769 * @ctxlen is set to the new size, which includes a trailing nul byte.
771 * Returns 0 on success, -ENOMEM if no memory is available.
773 static int append_ctx(char **ctx
, int *ctxlen
, const char *lsm
, char *new,
781 llen
= strlen(lsm
) + 1;
783 * A security module may or may not provide a trailing nul on
784 * when returning a security context. There is no definition
785 * of which it should be, and there are modules that do it
788 nlen
= strnlen(new, newlen
);
790 flen
= *ctxlen
+ llen
+ nlen
+ 1;
791 final
= kzalloc(flen
, GFP_KERNEL
);
797 memcpy(final
, *ctx
, *ctxlen
);
799 memcpy(final
+ *ctxlen
, lsm
, llen
);
800 memcpy(final
+ *ctxlen
+ llen
, new, nlen
);
811 * The default value of the LSM hook is defined in linux/lsm_hook_defs.h and
812 * can be accessed with:
814 * LSM_RET_DEFAULT(<hook_name>)
816 * The macros below define static constants for the default value of each
819 #define LSM_RET_DEFAULT(NAME) (NAME##_default)
820 #define DECLARE_LSM_RET_DEFAULT_void(DEFAULT, NAME)
821 #define DECLARE_LSM_RET_DEFAULT_int(DEFAULT, NAME) \
822 static const int LSM_RET_DEFAULT(NAME) = (DEFAULT);
823 #define LSM_HOOK(RET, DEFAULT, NAME, ...) \
824 DECLARE_LSM_RET_DEFAULT_##RET(DEFAULT, NAME)
826 #include <linux/lsm_hook_defs.h>
830 * Hook list operation macros.
833 * This is a hook that does not return a value.
836 * This is a hook that returns a value.
839 #define call_void_hook(FUNC, ...) \
841 struct security_hook_list *P; \
843 hlist_for_each_entry(P, &security_hook_heads.FUNC, list) \
844 P->hook.FUNC(__VA_ARGS__); \
847 #define call_int_hook(FUNC, IRC, ...) ({ \
850 struct security_hook_list *P; \
852 hlist_for_each_entry(P, &security_hook_heads.FUNC, list) { \
853 RC = P->hook.FUNC(__VA_ARGS__); \
861 /* Security operations */
863 int security_binder_set_context_mgr(struct task_struct
*mgr
)
865 return call_int_hook(binder_set_context_mgr
, 0, mgr
);
867 EXPORT_SYMBOL(security_binder_set_context_mgr
);
870 * security_binder_transaction - Binder driver transaction check
871 * @from: source of the transaction
872 * @to: destination of the transaction
874 * Verify that the tasks have the same LSM "display", then
875 * call the security module hooks.
877 * Returns -EINVAL if the displays don't match, or the
878 * result of the security module checks.
880 int security_binder_transaction(struct task_struct
*from
,
881 struct task_struct
*to
)
883 int from_display
= lsm_task_display(from
);
884 int to_display
= lsm_task_display(to
);
887 * If the display is LSMBLOB_INVALID the first module that has
888 * an entry is used. This will be in the 0 slot.
890 * This is currently only required if the server has requested
891 * peer contexts, but it would be unwieldly to have too much of
892 * the binder driver detail here.
894 if (from_display
== LSMBLOB_INVALID
)
896 if (to_display
== LSMBLOB_INVALID
)
898 if (from_display
!= to_display
)
901 return call_int_hook(binder_transaction
, 0, from
, to
);
903 EXPORT_SYMBOL(security_binder_transaction
);
905 int security_binder_transfer_binder(struct task_struct
*from
,
906 struct task_struct
*to
)
908 return call_int_hook(binder_transfer_binder
, 0, from
, to
);
910 EXPORT_SYMBOL(security_binder_transfer_binder
);
912 int security_binder_transfer_file(struct task_struct
*from
,
913 struct task_struct
*to
, struct file
*file
)
915 return call_int_hook(binder_transfer_file
, 0, from
, to
, file
);
917 EXPORT_SYMBOL(security_binder_transfer_file
);
919 int security_ptrace_access_check(struct task_struct
*child
, unsigned int mode
)
921 return call_int_hook(ptrace_access_check
, 0, child
, mode
);
924 int security_ptrace_traceme(struct task_struct
*parent
)
926 return call_int_hook(ptrace_traceme
, 0, parent
);
929 int security_capget(struct task_struct
*target
,
930 kernel_cap_t
*effective
,
931 kernel_cap_t
*inheritable
,
932 kernel_cap_t
*permitted
)
934 return call_int_hook(capget
, 0, target
,
935 effective
, inheritable
, permitted
);
938 int security_capset(struct cred
*new, const struct cred
*old
,
939 const kernel_cap_t
*effective
,
940 const kernel_cap_t
*inheritable
,
941 const kernel_cap_t
*permitted
)
943 return call_int_hook(capset
, 0, new, old
,
944 effective
, inheritable
, permitted
);
947 int security_capable(const struct cred
*cred
,
948 struct user_namespace
*ns
,
952 return call_int_hook(capable
, 0, cred
, ns
, cap
, opts
);
955 int security_quotactl(int cmds
, int type
, int id
, struct super_block
*sb
)
957 return call_int_hook(quotactl
, 0, cmds
, type
, id
, sb
);
960 int security_quota_on(struct dentry
*dentry
)
962 return call_int_hook(quota_on
, 0, dentry
);
965 int security_syslog(int type
)
967 return call_int_hook(syslog
, 0, type
);
970 int security_settime64(const struct timespec64
*ts
, const struct timezone
*tz
)
972 return call_int_hook(settime
, 0, ts
, tz
);
975 int security_vm_enough_memory_mm(struct mm_struct
*mm
, long pages
)
977 struct security_hook_list
*hp
;
978 int cap_sys_admin
= 1;
982 * The module will respond with a positive value if
983 * it thinks the __vm_enough_memory() call should be
984 * made with the cap_sys_admin set. If all of the modules
985 * agree that it should be set it will. If any module
986 * thinks it should not be set it won't.
988 hlist_for_each_entry(hp
, &security_hook_heads
.vm_enough_memory
, list
) {
989 rc
= hp
->hook
.vm_enough_memory(mm
, pages
);
995 return __vm_enough_memory(mm
, pages
, cap_sys_admin
);
998 int security_bprm_creds_for_exec(struct linux_binprm
*bprm
)
1000 return call_int_hook(bprm_creds_for_exec
, 0, bprm
);
1003 int security_bprm_creds_from_file(struct linux_binprm
*bprm
, struct file
*file
)
1005 return call_int_hook(bprm_creds_from_file
, 0, bprm
, file
);
1008 int security_bprm_check(struct linux_binprm
*bprm
)
1012 ret
= call_int_hook(bprm_check_security
, 0, bprm
);
1015 return ima_bprm_check(bprm
);
1018 void security_bprm_committing_creds(struct linux_binprm
*bprm
)
1020 call_void_hook(bprm_committing_creds
, bprm
);
1023 void security_bprm_committed_creds(struct linux_binprm
*bprm
)
1025 call_void_hook(bprm_committed_creds
, bprm
);
1028 int security_fs_context_dup(struct fs_context
*fc
, struct fs_context
*src_fc
)
1030 return call_int_hook(fs_context_dup
, 0, fc
, src_fc
);
1033 int security_fs_context_parse_param(struct fs_context
*fc
, struct fs_parameter
*param
)
1035 return call_int_hook(fs_context_parse_param
, -ENOPARAM
, fc
, param
);
1038 int security_sb_alloc(struct super_block
*sb
)
1040 return call_int_hook(sb_alloc_security
, 0, sb
);
1043 void security_sb_free(struct super_block
*sb
)
1045 call_void_hook(sb_free_security
, sb
);
1048 void security_free_mnt_opts(void **mnt_opts
)
1052 call_void_hook(sb_free_mnt_opts
, *mnt_opts
);
1055 EXPORT_SYMBOL(security_free_mnt_opts
);
1057 int security_sb_eat_lsm_opts(char *options
, void **mnt_opts
)
1059 return call_int_hook(sb_eat_lsm_opts
, 0, options
, mnt_opts
);
1061 EXPORT_SYMBOL(security_sb_eat_lsm_opts
);
1063 int security_sb_remount(struct super_block
*sb
,
1066 return call_int_hook(sb_remount
, 0, sb
, mnt_opts
);
1068 EXPORT_SYMBOL(security_sb_remount
);
1070 int security_sb_kern_mount(struct super_block
*sb
)
1072 return call_int_hook(sb_kern_mount
, 0, sb
);
1075 int security_sb_show_options(struct seq_file
*m
, struct super_block
*sb
)
1077 return call_int_hook(sb_show_options
, 0, m
, sb
);
1080 int security_sb_statfs(struct dentry
*dentry
)
1082 return call_int_hook(sb_statfs
, 0, dentry
);
1085 int security_sb_mount(const char *dev_name
, const struct path
*path
,
1086 const char *type
, unsigned long flags
, void *data
)
1088 return call_int_hook(sb_mount
, 0, dev_name
, path
, type
, flags
, data
);
1091 int security_sb_umount(struct vfsmount
*mnt
, int flags
)
1093 return call_int_hook(sb_umount
, 0, mnt
, flags
);
1096 int security_sb_pivotroot(const struct path
*old_path
, const struct path
*new_path
)
1098 return call_int_hook(sb_pivotroot
, 0, old_path
, new_path
);
1101 int security_sb_set_mnt_opts(struct super_block
*sb
,
1103 unsigned long kern_flags
,
1104 unsigned long *set_kern_flags
)
1106 return call_int_hook(sb_set_mnt_opts
,
1107 mnt_opts
? -EOPNOTSUPP
: 0, sb
,
1108 mnt_opts
, kern_flags
, set_kern_flags
);
1110 EXPORT_SYMBOL(security_sb_set_mnt_opts
);
1112 int security_sb_clone_mnt_opts(const struct super_block
*oldsb
,
1113 struct super_block
*newsb
,
1114 unsigned long kern_flags
,
1115 unsigned long *set_kern_flags
)
1117 return call_int_hook(sb_clone_mnt_opts
, 0, oldsb
, newsb
,
1118 kern_flags
, set_kern_flags
);
1120 EXPORT_SYMBOL(security_sb_clone_mnt_opts
);
1122 int security_add_mnt_opt(const char *option
, const char *val
, int len
,
1125 return call_int_hook(sb_add_mnt_opt
, -EINVAL
,
1126 option
, val
, len
, mnt_opts
);
1128 EXPORT_SYMBOL(security_add_mnt_opt
);
1130 int security_move_mount(const struct path
*from_path
, const struct path
*to_path
)
1132 return call_int_hook(move_mount
, 0, from_path
, to_path
);
1135 int security_path_notify(const struct path
*path
, u64 mask
,
1136 unsigned int obj_type
)
1138 return call_int_hook(path_notify
, 0, path
, mask
, obj_type
);
1141 int security_inode_alloc(struct inode
*inode
)
1143 int rc
= lsm_inode_alloc(inode
);
1147 rc
= call_int_hook(inode_alloc_security
, 0, inode
);
1149 security_inode_free(inode
);
1153 static void inode_free_by_rcu(struct rcu_head
*head
)
1156 * The rcu head is at the start of the inode blob
1158 kmem_cache_free(lsm_inode_cache
, head
);
1161 void security_inode_free(struct inode
*inode
)
1163 integrity_inode_free(inode
);
1164 call_void_hook(inode_free_security
, inode
);
1166 * The inode may still be referenced in a path walk and
1167 * a call to security_inode_permission() can be made
1168 * after inode_free_security() is called. Ideally, the VFS
1169 * wouldn't do this, but fixing that is a much harder
1170 * job. For now, simply free the i_security via RCU, and
1171 * leave the current inode->i_security pointer intact.
1172 * The inode will be freed after the RCU grace period too.
1174 if (inode
->i_security
)
1175 call_rcu((struct rcu_head
*)inode
->i_security
,
1179 int security_dentry_init_security(struct dentry
*dentry
, int mode
,
1180 const struct qstr
*name
, void **ctx
,
1183 return call_int_hook(dentry_init_security
, -EOPNOTSUPP
, dentry
, mode
,
1186 EXPORT_SYMBOL(security_dentry_init_security
);
1188 int security_dentry_create_files_as(struct dentry
*dentry
, int mode
,
1190 const struct cred
*old
, struct cred
*new)
1192 return call_int_hook(dentry_create_files_as
, 0, dentry
, mode
,
1195 EXPORT_SYMBOL(security_dentry_create_files_as
);
1197 int security_inode_init_security(struct inode
*inode
, struct inode
*dir
,
1198 const struct qstr
*qstr
,
1199 const initxattrs initxattrs
, void *fs_data
)
1201 struct xattr new_xattrs
[MAX_LSM_EVM_XATTR
+ 1];
1202 struct xattr
*lsm_xattr
, *evm_xattr
, *xattr
;
1205 if (unlikely(IS_PRIVATE(inode
)))
1209 return call_int_hook(inode_init_security
, -EOPNOTSUPP
, inode
,
1210 dir
, qstr
, NULL
, NULL
, NULL
);
1211 memset(new_xattrs
, 0, sizeof(new_xattrs
));
1212 lsm_xattr
= new_xattrs
;
1213 ret
= call_int_hook(inode_init_security
, -EOPNOTSUPP
, inode
, dir
, qstr
,
1216 &lsm_xattr
->value_len
);
1220 evm_xattr
= lsm_xattr
+ 1;
1221 ret
= evm_inode_init_security(inode
, lsm_xattr
, evm_xattr
);
1224 ret
= initxattrs(inode
, new_xattrs
, fs_data
);
1226 for (xattr
= new_xattrs
; xattr
->value
!= NULL
; xattr
++)
1227 kfree(xattr
->value
);
1228 return (ret
== -EOPNOTSUPP
) ? 0 : ret
;
1230 EXPORT_SYMBOL(security_inode_init_security
);
1232 int security_old_inode_init_security(struct inode
*inode
, struct inode
*dir
,
1233 const struct qstr
*qstr
, const char **name
,
1234 void **value
, size_t *len
)
1236 if (unlikely(IS_PRIVATE(inode
)))
1238 return call_int_hook(inode_init_security
, -EOPNOTSUPP
, inode
, dir
,
1239 qstr
, name
, value
, len
);
1241 EXPORT_SYMBOL(security_old_inode_init_security
);
1243 #ifdef CONFIG_SECURITY_PATH
1244 int security_path_mknod(const struct path
*dir
, struct dentry
*dentry
, umode_t mode
,
1247 if (unlikely(IS_PRIVATE(d_backing_inode(dir
->dentry
))))
1249 return call_int_hook(path_mknod
, 0, dir
, dentry
, mode
, dev
);
1251 EXPORT_SYMBOL(security_path_mknod
);
1253 int security_path_mkdir(const struct path
*dir
, struct dentry
*dentry
, umode_t mode
)
1255 if (unlikely(IS_PRIVATE(d_backing_inode(dir
->dentry
))))
1257 return call_int_hook(path_mkdir
, 0, dir
, dentry
, mode
);
1259 EXPORT_SYMBOL(security_path_mkdir
);
1261 int security_path_rmdir(const struct path
*dir
, struct dentry
*dentry
)
1263 if (unlikely(IS_PRIVATE(d_backing_inode(dir
->dentry
))))
1265 return call_int_hook(path_rmdir
, 0, dir
, dentry
);
1267 EXPORT_SYMBOL_GPL(security_path_rmdir
);
1269 int security_path_unlink(const struct path
*dir
, struct dentry
*dentry
)
1271 if (unlikely(IS_PRIVATE(d_backing_inode(dir
->dentry
))))
1273 return call_int_hook(path_unlink
, 0, dir
, dentry
);
1275 EXPORT_SYMBOL(security_path_unlink
);
1277 int security_path_symlink(const struct path
*dir
, struct dentry
*dentry
,
1278 const char *old_name
)
1280 if (unlikely(IS_PRIVATE(d_backing_inode(dir
->dentry
))))
1282 return call_int_hook(path_symlink
, 0, dir
, dentry
, old_name
);
1284 EXPORT_SYMBOL_GPL(security_path_symlink
);
1286 int security_path_link(struct dentry
*old_dentry
, const struct path
*new_dir
,
1287 struct dentry
*new_dentry
)
1289 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry
))))
1291 return call_int_hook(path_link
, 0, old_dentry
, new_dir
, new_dentry
);
1293 EXPORT_SYMBOL_GPL(security_path_link
);
1295 int security_path_rename(const struct path
*old_dir
, struct dentry
*old_dentry
,
1296 const struct path
*new_dir
, struct dentry
*new_dentry
,
1299 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry
)) ||
1300 (d_is_positive(new_dentry
) && IS_PRIVATE(d_backing_inode(new_dentry
)))))
1303 if (flags
& RENAME_EXCHANGE
) {
1304 int err
= call_int_hook(path_rename
, 0, new_dir
, new_dentry
,
1305 old_dir
, old_dentry
);
1310 return call_int_hook(path_rename
, 0, old_dir
, old_dentry
, new_dir
,
1313 EXPORT_SYMBOL(security_path_rename
);
1315 int security_path_truncate(const struct path
*path
)
1317 if (unlikely(IS_PRIVATE(d_backing_inode(path
->dentry
))))
1319 return call_int_hook(path_truncate
, 0, path
);
1321 EXPORT_SYMBOL_GPL(security_path_truncate
);
1323 int security_path_chmod(const struct path
*path
, umode_t mode
)
1325 if (unlikely(IS_PRIVATE(d_backing_inode(path
->dentry
))))
1327 return call_int_hook(path_chmod
, 0, path
, mode
);
1329 EXPORT_SYMBOL_GPL(security_path_chmod
);
1331 int security_path_chown(const struct path
*path
, kuid_t uid
, kgid_t gid
)
1333 if (unlikely(IS_PRIVATE(d_backing_inode(path
->dentry
))))
1335 return call_int_hook(path_chown
, 0, path
, uid
, gid
);
1337 EXPORT_SYMBOL_GPL(security_path_chown
);
1339 int security_path_chroot(const struct path
*path
)
1341 return call_int_hook(path_chroot
, 0, path
);
1345 int security_inode_create(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
)
1347 if (unlikely(IS_PRIVATE(dir
)))
1349 return call_int_hook(inode_create
, 0, dir
, dentry
, mode
);
1351 EXPORT_SYMBOL_GPL(security_inode_create
);
1353 int security_inode_link(struct dentry
*old_dentry
, struct inode
*dir
,
1354 struct dentry
*new_dentry
)
1356 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry
))))
1358 return call_int_hook(inode_link
, 0, old_dentry
, dir
, new_dentry
);
1361 int security_inode_unlink(struct inode
*dir
, struct dentry
*dentry
)
1363 if (unlikely(IS_PRIVATE(d_backing_inode(dentry
))))
1365 return call_int_hook(inode_unlink
, 0, dir
, dentry
);
1368 int security_inode_symlink(struct inode
*dir
, struct dentry
*dentry
,
1369 const char *old_name
)
1371 if (unlikely(IS_PRIVATE(dir
)))
1373 return call_int_hook(inode_symlink
, 0, dir
, dentry
, old_name
);
1376 int security_inode_mkdir(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
)
1378 if (unlikely(IS_PRIVATE(dir
)))
1380 return call_int_hook(inode_mkdir
, 0, dir
, dentry
, mode
);
1382 EXPORT_SYMBOL_GPL(security_inode_mkdir
);
1384 int security_inode_rmdir(struct inode
*dir
, struct dentry
*dentry
)
1386 if (unlikely(IS_PRIVATE(d_backing_inode(dentry
))))
1388 return call_int_hook(inode_rmdir
, 0, dir
, dentry
);
1391 int security_inode_mknod(struct inode
*dir
, struct dentry
*dentry
, umode_t mode
, dev_t dev
)
1393 if (unlikely(IS_PRIVATE(dir
)))
1395 return call_int_hook(inode_mknod
, 0, dir
, dentry
, mode
, dev
);
1398 int security_inode_rename(struct inode
*old_dir
, struct dentry
*old_dentry
,
1399 struct inode
*new_dir
, struct dentry
*new_dentry
,
1402 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry
)) ||
1403 (d_is_positive(new_dentry
) && IS_PRIVATE(d_backing_inode(new_dentry
)))))
1406 if (flags
& RENAME_EXCHANGE
) {
1407 int err
= call_int_hook(inode_rename
, 0, new_dir
, new_dentry
,
1408 old_dir
, old_dentry
);
1413 return call_int_hook(inode_rename
, 0, old_dir
, old_dentry
,
1414 new_dir
, new_dentry
);
1417 int security_inode_readlink(struct dentry
*dentry
)
1419 if (unlikely(IS_PRIVATE(d_backing_inode(dentry
))))
1421 return call_int_hook(inode_readlink
, 0, dentry
);
1424 int security_inode_follow_link(struct dentry
*dentry
, struct inode
*inode
,
1427 if (unlikely(IS_PRIVATE(inode
)))
1429 return call_int_hook(inode_follow_link
, 0, dentry
, inode
, rcu
);
1432 int security_inode_permission(struct inode
*inode
, int mask
)
1434 if (unlikely(IS_PRIVATE(inode
)))
1436 return call_int_hook(inode_permission
, 0, inode
, mask
);
1438 EXPORT_SYMBOL_GPL(security_inode_permission
);
1440 int security_inode_setattr(struct dentry
*dentry
, struct iattr
*attr
)
1444 if (unlikely(IS_PRIVATE(d_backing_inode(dentry
))))
1446 ret
= call_int_hook(inode_setattr
, 0, dentry
, attr
);
1449 return evm_inode_setattr(dentry
, attr
);
1451 EXPORT_SYMBOL_GPL(security_inode_setattr
);
1453 int security_inode_getattr(const struct path
*path
)
1455 if (unlikely(IS_PRIVATE(d_backing_inode(path
->dentry
))))
1457 return call_int_hook(inode_getattr
, 0, path
);
1460 int security_inode_setxattr(struct dentry
*dentry
, const char *name
,
1461 const void *value
, size_t size
, int flags
)
1465 if (unlikely(IS_PRIVATE(d_backing_inode(dentry
))))
1468 * SELinux and Smack integrate the cap call,
1469 * so assume that all LSMs supplying this call do so.
1471 ret
= call_int_hook(inode_setxattr
, 1, dentry
, name
, value
, size
,
1475 ret
= cap_inode_setxattr(dentry
, name
, value
, size
, flags
);
1478 ret
= ima_inode_setxattr(dentry
, name
, value
, size
);
1481 return evm_inode_setxattr(dentry
, name
, value
, size
);
1484 void security_inode_post_setxattr(struct dentry
*dentry
, const char *name
,
1485 const void *value
, size_t size
, int flags
)
1487 if (unlikely(IS_PRIVATE(d_backing_inode(dentry
))))
1489 call_void_hook(inode_post_setxattr
, dentry
, name
, value
, size
, flags
);
1490 evm_inode_post_setxattr(dentry
, name
, value
, size
);
1493 int security_inode_getxattr(struct dentry
*dentry
, const char *name
)
1495 if (unlikely(IS_PRIVATE(d_backing_inode(dentry
))))
1497 return call_int_hook(inode_getxattr
, 0, dentry
, name
);
1500 int security_inode_listxattr(struct dentry
*dentry
)
1502 if (unlikely(IS_PRIVATE(d_backing_inode(dentry
))))
1504 return call_int_hook(inode_listxattr
, 0, dentry
);
1507 int security_inode_removexattr(struct dentry
*dentry
, const char *name
)
1511 if (unlikely(IS_PRIVATE(d_backing_inode(dentry
))))
1514 * SELinux and Smack integrate the cap call,
1515 * so assume that all LSMs supplying this call do so.
1517 ret
= call_int_hook(inode_removexattr
, 1, dentry
, name
);
1519 ret
= cap_inode_removexattr(dentry
, name
);
1522 ret
= ima_inode_removexattr(dentry
, name
);
1525 return evm_inode_removexattr(dentry
, name
);
1528 int security_inode_need_killpriv(struct dentry
*dentry
)
1530 return call_int_hook(inode_need_killpriv
, 0, dentry
);
1533 int security_inode_killpriv(struct dentry
*dentry
)
1535 return call_int_hook(inode_killpriv
, 0, dentry
);
1538 int security_inode_getsecurity(struct inode
*inode
, const char *name
, void **buffer
, bool alloc
)
1540 struct security_hook_list
*hp
;
1543 if (unlikely(IS_PRIVATE(inode
)))
1544 return LSM_RET_DEFAULT(inode_getsecurity
);
1546 * Only one module will provide an attribute with a given name.
1548 hlist_for_each_entry(hp
, &security_hook_heads
.inode_getsecurity
, list
) {
1549 rc
= hp
->hook
.inode_getsecurity(inode
, name
, buffer
, alloc
);
1550 if (rc
!= LSM_RET_DEFAULT(inode_getsecurity
))
1553 return LSM_RET_DEFAULT(inode_getsecurity
);
1556 int security_inode_setsecurity(struct inode
*inode
, const char *name
, const void *value
, size_t size
, int flags
)
1558 struct security_hook_list
*hp
;
1561 if (unlikely(IS_PRIVATE(inode
)))
1562 return LSM_RET_DEFAULT(inode_setsecurity
);
1564 * Only one module will provide an attribute with a given name.
1566 hlist_for_each_entry(hp
, &security_hook_heads
.inode_setsecurity
, list
) {
1567 rc
= hp
->hook
.inode_setsecurity(inode
, name
, value
, size
,
1569 if (rc
!= LSM_RET_DEFAULT(inode_setsecurity
))
1572 return LSM_RET_DEFAULT(inode_setsecurity
);
1575 int security_inode_listsecurity(struct inode
*inode
, char *buffer
, size_t buffer_size
)
1577 if (unlikely(IS_PRIVATE(inode
)))
1579 return call_int_hook(inode_listsecurity
, 0, inode
, buffer
, buffer_size
);
1581 EXPORT_SYMBOL(security_inode_listsecurity
);
1583 void security_inode_getsecid(struct inode
*inode
, struct lsmblob
*blob
)
1585 struct security_hook_list
*hp
;
1587 lsmblob_init(blob
, 0);
1588 hlist_for_each_entry(hp
, &security_hook_heads
.inode_getsecid
, list
) {
1589 if (WARN_ON(hp
->lsmid
->slot
< 0 || hp
->lsmid
->slot
>= lsm_slot
))
1591 hp
->hook
.inode_getsecid(inode
, &blob
->secid
[hp
->lsmid
->slot
]);
1595 int security_inode_copy_up(struct dentry
*src
, struct cred
**new)
1597 return call_int_hook(inode_copy_up
, 0, src
, new);
1599 EXPORT_SYMBOL(security_inode_copy_up
);
1601 int security_inode_copy_up_xattr(const char *name
)
1603 struct security_hook_list
*hp
;
1607 * The implementation can return 0 (accept the xattr), 1 (discard the
1608 * xattr), -EOPNOTSUPP if it does not know anything about the xattr or
1609 * any other error code incase of an error.
1611 hlist_for_each_entry(hp
,
1612 &security_hook_heads
.inode_copy_up_xattr
, list
) {
1613 rc
= hp
->hook
.inode_copy_up_xattr(name
);
1614 if (rc
!= LSM_RET_DEFAULT(inode_copy_up_xattr
))
1618 return LSM_RET_DEFAULT(inode_copy_up_xattr
);
1620 EXPORT_SYMBOL(security_inode_copy_up_xattr
);
1622 int security_kernfs_init_security(struct kernfs_node
*kn_dir
,
1623 struct kernfs_node
*kn
)
1625 return call_int_hook(kernfs_init_security
, 0, kn_dir
, kn
);
1628 int security_file_permission(struct file
*file
, int mask
)
1632 ret
= call_int_hook(file_permission
, 0, file
, mask
);
1636 return fsnotify_perm(file
, mask
);
1638 EXPORT_SYMBOL_GPL(security_file_permission
);
1640 int security_file_alloc(struct file
*file
)
1642 int rc
= lsm_file_alloc(file
);
1646 rc
= call_int_hook(file_alloc_security
, 0, file
);
1648 security_file_free(file
);
1652 void security_file_free(struct file
*file
)
1656 call_void_hook(file_free_security
, file
);
1658 blob
= file
->f_security
;
1660 file
->f_security
= NULL
;
1661 kmem_cache_free(lsm_file_cache
, blob
);
1665 int security_file_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
)
1667 return call_int_hook(file_ioctl
, 0, file
, cmd
, arg
);
1669 EXPORT_SYMBOL_GPL(security_file_ioctl
);
1671 static inline unsigned long mmap_prot(struct file
*file
, unsigned long prot
)
1674 * Does we have PROT_READ and does the application expect
1675 * it to imply PROT_EXEC? If not, nothing to talk about...
1677 if ((prot
& (PROT_READ
| PROT_EXEC
)) != PROT_READ
)
1679 if (!(current
->personality
& READ_IMPLIES_EXEC
))
1682 * if that's an anonymous mapping, let it.
1685 return prot
| PROT_EXEC
;
1687 * ditto if it's not on noexec mount, except that on !MMU we need
1688 * NOMMU_MAP_EXEC (== VM_MAYEXEC) in this case
1690 if (!path_noexec(&file
->f_path
)) {
1692 if (file
->f_op
->mmap_capabilities
) {
1693 unsigned caps
= file
->f_op
->mmap_capabilities(file
);
1694 if (!(caps
& NOMMU_MAP_EXEC
))
1698 return prot
| PROT_EXEC
;
1700 /* anything on noexec mount won't get PROT_EXEC */
1704 int security_mmap_file(struct file
*file
, unsigned long prot
,
1705 unsigned long flags
)
1708 ret
= call_int_hook(mmap_file
, 0, file
, prot
,
1709 mmap_prot(file
, prot
), flags
);
1712 return ima_file_mmap(file
, prot
);
1715 int security_mmap_addr(unsigned long addr
)
1717 return call_int_hook(mmap_addr
, 0, addr
);
1720 int security_file_mprotect(struct vm_area_struct
*vma
, unsigned long reqprot
,
1725 ret
= call_int_hook(file_mprotect
, 0, vma
, reqprot
, prot
);
1728 return ima_file_mprotect(vma
, prot
);
1731 int security_file_lock(struct file
*file
, unsigned int cmd
)
1733 return call_int_hook(file_lock
, 0, file
, cmd
);
1736 int security_file_fcntl(struct file
*file
, unsigned int cmd
, unsigned long arg
)
1738 return call_int_hook(file_fcntl
, 0, file
, cmd
, arg
);
1741 void security_file_set_fowner(struct file
*file
)
1743 call_void_hook(file_set_fowner
, file
);
1746 int security_file_send_sigiotask(struct task_struct
*tsk
,
1747 struct fown_struct
*fown
, int sig
)
1749 return call_int_hook(file_send_sigiotask
, 0, tsk
, fown
, sig
);
1752 int security_file_receive(struct file
*file
)
1754 return call_int_hook(file_receive
, 0, file
);
1757 int security_file_open(struct file
*file
)
1761 ret
= call_int_hook(file_open
, 0, file
);
1765 return fsnotify_perm(file
, MAY_OPEN
);
1768 int security_task_alloc(struct task_struct
*task
, unsigned long clone_flags
)
1770 int *odisplay
= current
->security
;
1772 int rc
= lsm_task_alloc(task
);
1777 rc
= call_int_hook(task_alloc
, 0, task
, clone_flags
);
1779 security_task_free(task
);
1784 ndisplay
= task
->security
;
1786 *ndisplay
= *odisplay
;
1792 void security_task_free(struct task_struct
*task
)
1794 call_void_hook(task_free
, task
);
1796 kfree(task
->security
);
1797 task
->security
= NULL
;
1800 int security_cred_alloc_blank(struct cred
*cred
, gfp_t gfp
)
1802 int rc
= lsm_cred_alloc(cred
, gfp
);
1807 rc
= call_int_hook(cred_alloc_blank
, 0, cred
, gfp
);
1809 security_cred_free(cred
);
1813 void security_cred_free(struct cred
*cred
)
1816 * There is a failure case in prepare_creds() that
1817 * may result in a call here with ->security being NULL.
1819 if (unlikely(cred
->security
== NULL
))
1822 call_void_hook(cred_free
, cred
);
1824 kfree(cred
->security
);
1825 cred
->security
= NULL
;
1828 int security_prepare_creds(struct cred
*new, const struct cred
*old
, gfp_t gfp
)
1830 int rc
= lsm_cred_alloc(new, gfp
);
1835 rc
= call_int_hook(cred_prepare
, 0, new, old
, gfp
);
1837 security_cred_free(new);
1841 void security_transfer_creds(struct cred
*new, const struct cred
*old
)
1843 call_void_hook(cred_transfer
, new, old
);
1846 void security_cred_getsecid(const struct cred
*c
, struct lsmblob
*blob
)
1848 struct security_hook_list
*hp
;
1850 lsmblob_init(blob
, 0);
1851 hlist_for_each_entry(hp
, &security_hook_heads
.cred_getsecid
, list
) {
1852 if (WARN_ON(hp
->lsmid
->slot
< 0 || hp
->lsmid
->slot
>= lsm_slot
))
1854 hp
->hook
.cred_getsecid(c
, &blob
->secid
[hp
->lsmid
->slot
]);
1857 EXPORT_SYMBOL(security_cred_getsecid
);
1859 int security_kernel_act_as(struct cred
*new, struct lsmblob
*blob
)
1861 struct security_hook_list
*hp
;
1864 hlist_for_each_entry(hp
, &security_hook_heads
.kernel_act_as
, list
) {
1865 if (WARN_ON(hp
->lsmid
->slot
< 0 || hp
->lsmid
->slot
>= lsm_slot
))
1867 rc
= hp
->hook
.kernel_act_as(new, blob
->secid
[hp
->lsmid
->slot
]);
1874 int security_kernel_create_files_as(struct cred
*new, struct inode
*inode
)
1876 return call_int_hook(kernel_create_files_as
, 0, new, inode
);
1879 int security_kernel_module_request(char *kmod_name
)
1883 ret
= call_int_hook(kernel_module_request
, 0, kmod_name
);
1886 return integrity_kernel_module_request(kmod_name
);
1889 int security_kernel_read_file(struct file
*file
, enum kernel_read_file_id id
,
1894 ret
= call_int_hook(kernel_read_file
, 0, file
, id
, contents
);
1897 return ima_read_file(file
, id
, contents
);
1899 EXPORT_SYMBOL_GPL(security_kernel_read_file
);
1901 int security_kernel_post_read_file(struct file
*file
, char *buf
, loff_t size
,
1902 enum kernel_read_file_id id
)
1906 ret
= call_int_hook(kernel_post_read_file
, 0, file
, buf
, size
, id
);
1909 return ima_post_read_file(file
, buf
, size
, id
);
1911 EXPORT_SYMBOL_GPL(security_kernel_post_read_file
);
1913 int security_kernel_load_data(enum kernel_load_data_id id
, bool contents
)
1917 ret
= call_int_hook(kernel_load_data
, 0, id
, contents
);
1920 return ima_load_data(id
, contents
);
1922 EXPORT_SYMBOL_GPL(security_kernel_load_data
);
1924 int security_kernel_post_load_data(char *buf
, loff_t size
,
1925 enum kernel_load_data_id id
,
1930 ret
= call_int_hook(kernel_post_load_data
, 0, buf
, size
, id
,
1934 return ima_post_load_data(buf
, size
, id
, description
);
1936 EXPORT_SYMBOL_GPL(security_kernel_post_load_data
);
1938 int security_task_fix_setuid(struct cred
*new, const struct cred
*old
,
1941 return call_int_hook(task_fix_setuid
, 0, new, old
, flags
);
1944 int security_task_fix_setgid(struct cred
*new, const struct cred
*old
,
1947 return call_int_hook(task_fix_setgid
, 0, new, old
, flags
);
1950 int security_task_setpgid(struct task_struct
*p
, pid_t pgid
)
1952 return call_int_hook(task_setpgid
, 0, p
, pgid
);
1955 int security_task_getpgid(struct task_struct
*p
)
1957 return call_int_hook(task_getpgid
, 0, p
);
1960 int security_task_getsid(struct task_struct
*p
)
1962 return call_int_hook(task_getsid
, 0, p
);
1965 void security_task_getsecid(struct task_struct
*p
, struct lsmblob
*blob
)
1967 struct security_hook_list
*hp
;
1969 lsmblob_init(blob
, 0);
1970 hlist_for_each_entry(hp
, &security_hook_heads
.task_getsecid
, list
) {
1971 if (WARN_ON(hp
->lsmid
->slot
< 0 || hp
->lsmid
->slot
>= lsm_slot
))
1973 hp
->hook
.task_getsecid(p
, &blob
->secid
[hp
->lsmid
->slot
]);
1976 EXPORT_SYMBOL(security_task_getsecid
);
1978 int security_task_setnice(struct task_struct
*p
, int nice
)
1980 return call_int_hook(task_setnice
, 0, p
, nice
);
1983 int security_task_setioprio(struct task_struct
*p
, int ioprio
)
1985 return call_int_hook(task_setioprio
, 0, p
, ioprio
);
1988 int security_task_getioprio(struct task_struct
*p
)
1990 return call_int_hook(task_getioprio
, 0, p
);
1993 int security_task_prlimit(const struct cred
*cred
, const struct cred
*tcred
,
1996 return call_int_hook(task_prlimit
, 0, cred
, tcred
, flags
);
1999 int security_task_setrlimit(struct task_struct
*p
, unsigned int resource
,
2000 struct rlimit
*new_rlim
)
2002 return call_int_hook(task_setrlimit
, 0, p
, resource
, new_rlim
);
2005 int security_task_setscheduler(struct task_struct
*p
)
2007 return call_int_hook(task_setscheduler
, 0, p
);
2010 int security_task_getscheduler(struct task_struct
*p
)
2012 return call_int_hook(task_getscheduler
, 0, p
);
2015 int security_task_movememory(struct task_struct
*p
)
2017 return call_int_hook(task_movememory
, 0, p
);
2020 int security_task_kill(struct task_struct
*p
, struct kernel_siginfo
*info
,
2021 int sig
, const struct cred
*cred
)
2023 return call_int_hook(task_kill
, 0, p
, info
, sig
, cred
);
2026 int security_task_prctl(int option
, unsigned long arg2
, unsigned long arg3
,
2027 unsigned long arg4
, unsigned long arg5
)
2030 int rc
= LSM_RET_DEFAULT(task_prctl
);
2031 struct security_hook_list
*hp
;
2033 hlist_for_each_entry(hp
, &security_hook_heads
.task_prctl
, list
) {
2034 thisrc
= hp
->hook
.task_prctl(option
, arg2
, arg3
, arg4
, arg5
);
2035 if (thisrc
!= LSM_RET_DEFAULT(task_prctl
)) {
2044 void security_task_to_inode(struct task_struct
*p
, struct inode
*inode
)
2046 call_void_hook(task_to_inode
, p
, inode
);
2049 int security_ipc_permission(struct kern_ipc_perm
*ipcp
, short flag
)
2051 return call_int_hook(ipc_permission
, 0, ipcp
, flag
);
2054 void security_ipc_getsecid(struct kern_ipc_perm
*ipcp
, struct lsmblob
*blob
)
2056 struct security_hook_list
*hp
;
2058 lsmblob_init(blob
, 0);
2059 hlist_for_each_entry(hp
, &security_hook_heads
.ipc_getsecid
, list
) {
2060 if (WARN_ON(hp
->lsmid
->slot
< 0 || hp
->lsmid
->slot
>= lsm_slot
))
2062 hp
->hook
.ipc_getsecid(ipcp
, &blob
->secid
[hp
->lsmid
->slot
]);
2066 int security_msg_msg_alloc(struct msg_msg
*msg
)
2068 int rc
= lsm_msg_msg_alloc(msg
);
2072 rc
= call_int_hook(msg_msg_alloc_security
, 0, msg
);
2074 security_msg_msg_free(msg
);
2078 void security_msg_msg_free(struct msg_msg
*msg
)
2080 call_void_hook(msg_msg_free_security
, msg
);
2081 kfree(msg
->security
);
2082 msg
->security
= NULL
;
2085 int security_msg_queue_alloc(struct kern_ipc_perm
*msq
)
2087 int rc
= lsm_ipc_alloc(msq
);
2091 rc
= call_int_hook(msg_queue_alloc_security
, 0, msq
);
2093 security_msg_queue_free(msq
);
2097 void security_msg_queue_free(struct kern_ipc_perm
*msq
)
2099 call_void_hook(msg_queue_free_security
, msq
);
2100 kfree(msq
->security
);
2101 msq
->security
= NULL
;
2104 int security_msg_queue_associate(struct kern_ipc_perm
*msq
, int msqflg
)
2106 return call_int_hook(msg_queue_associate
, 0, msq
, msqflg
);
2109 int security_msg_queue_msgctl(struct kern_ipc_perm
*msq
, int cmd
)
2111 return call_int_hook(msg_queue_msgctl
, 0, msq
, cmd
);
2114 int security_msg_queue_msgsnd(struct kern_ipc_perm
*msq
,
2115 struct msg_msg
*msg
, int msqflg
)
2117 return call_int_hook(msg_queue_msgsnd
, 0, msq
, msg
, msqflg
);
2120 int security_msg_queue_msgrcv(struct kern_ipc_perm
*msq
, struct msg_msg
*msg
,
2121 struct task_struct
*target
, long type
, int mode
)
2123 return call_int_hook(msg_queue_msgrcv
, 0, msq
, msg
, target
, type
, mode
);
2126 int security_shm_alloc(struct kern_ipc_perm
*shp
)
2128 int rc
= lsm_ipc_alloc(shp
);
2132 rc
= call_int_hook(shm_alloc_security
, 0, shp
);
2134 security_shm_free(shp
);
2138 void security_shm_free(struct kern_ipc_perm
*shp
)
2140 call_void_hook(shm_free_security
, shp
);
2141 kfree(shp
->security
);
2142 shp
->security
= NULL
;
2145 int security_shm_associate(struct kern_ipc_perm
*shp
, int shmflg
)
2147 return call_int_hook(shm_associate
, 0, shp
, shmflg
);
2150 int security_shm_shmctl(struct kern_ipc_perm
*shp
, int cmd
)
2152 return call_int_hook(shm_shmctl
, 0, shp
, cmd
);
2155 int security_shm_shmat(struct kern_ipc_perm
*shp
, char __user
*shmaddr
, int shmflg
)
2157 return call_int_hook(shm_shmat
, 0, shp
, shmaddr
, shmflg
);
2160 int security_sem_alloc(struct kern_ipc_perm
*sma
)
2162 int rc
= lsm_ipc_alloc(sma
);
2166 rc
= call_int_hook(sem_alloc_security
, 0, sma
);
2168 security_sem_free(sma
);
2172 void security_sem_free(struct kern_ipc_perm
*sma
)
2174 call_void_hook(sem_free_security
, sma
);
2175 kfree(sma
->security
);
2176 sma
->security
= NULL
;
2179 int security_sem_associate(struct kern_ipc_perm
*sma
, int semflg
)
2181 return call_int_hook(sem_associate
, 0, sma
, semflg
);
2184 int security_sem_semctl(struct kern_ipc_perm
*sma
, int cmd
)
2186 return call_int_hook(sem_semctl
, 0, sma
, cmd
);
2189 int security_sem_semop(struct kern_ipc_perm
*sma
, struct sembuf
*sops
,
2190 unsigned nsops
, int alter
)
2192 return call_int_hook(sem_semop
, 0, sma
, sops
, nsops
, alter
);
2195 void security_d_instantiate(struct dentry
*dentry
, struct inode
*inode
)
2197 if (unlikely(inode
&& IS_PRIVATE(inode
)))
2199 call_void_hook(d_instantiate
, dentry
, inode
);
2201 EXPORT_SYMBOL(security_d_instantiate
);
2203 int security_getprocattr(struct task_struct
*p
, const char *lsm
, char *name
,
2206 struct security_hook_list
*hp
;
2211 int display
= lsm_task_display(current
);
2214 if (!strcmp(name
, "display")) {
2216 * lsm_slot will be 0 if there are no displaying modules.
2222 * Only allow getting the current process' display.
2223 * There are too few reasons to get another process'
2224 * display and too many LSM policy issues.
2229 display
= lsm_task_display(p
);
2230 if (display
!= LSMBLOB_INVALID
)
2232 *value
= kstrdup(lsm_slotlist
[slot
]->lsm
, GFP_KERNEL
);
2234 return strlen(*value
);
2238 if (!strcmp(name
, "context")) {
2239 hlist_for_each_entry(hp
, &security_hook_heads
.getprocattr
,
2241 rc
= hp
->hook
.getprocattr(p
, "context", &cp
);
2248 rc
= append_ctx(&final
, &finallen
, hp
->lsmid
->lsm
,
2262 hlist_for_each_entry(hp
, &security_hook_heads
.getprocattr
, list
) {
2263 if (lsm
!= NULL
&& strcmp(lsm
, hp
->lsmid
->lsm
))
2265 if (lsm
== NULL
&& display
!= LSMBLOB_INVALID
&&
2266 display
!= hp
->lsmid
->slot
)
2268 return hp
->hook
.getprocattr(p
, name
, value
);
2270 return LSM_RET_DEFAULT(getprocattr
);
2274 * security_setprocattr - Set process attributes via /proc
2275 * @lsm: name of module involved, or NULL
2276 * @name: name of the attribute
2277 * @value: value to set the attribute to
2278 * @size: size of the value
2280 * Set the process attribute for the specified security module
2281 * to the specified value. Note that this can only be used to set
2282 * the process attributes for the current, or "self" process.
2283 * The /proc code has already done this check.
2285 * Returns 0 on success, an appropriate code otherwise.
2287 int security_setprocattr(const char *lsm
, const char *name
, void *value
,
2290 struct security_hook_list
*hp
;
2293 int *display
= current
->security
;
2297 if (!strcmp(name
, "display")) {
2299 * Change the "display" value only if all the security
2300 * modules that support setting a procattr allow it.
2301 * It is assumed that all such security modules will be
2307 hlist_for_each_entry(hp
, &security_hook_heads
.setprocattr
,
2309 rc
= hp
->hook
.setprocattr(name
, value
, size
);
2310 if (rc
< 0 && rc
!= -EINVAL
)
2316 copy
= kmemdup_nul(value
, size
, GFP_KERNEL
);
2320 termed
= strsep(©
, " \n");
2322 for (slot
= 0; slot
< lsm_slot
; slot
++)
2323 if (!strcmp(termed
, lsm_slotlist
[slot
]->lsm
)) {
2324 *display
= lsm_slotlist
[slot
]->slot
;
2333 hlist_for_each_entry(hp
, &security_hook_heads
.setprocattr
, list
) {
2334 if (lsm
!= NULL
&& strcmp(lsm
, hp
->lsmid
->lsm
))
2336 if (lsm
== NULL
&& *display
!= LSMBLOB_INVALID
&&
2337 *display
!= hp
->lsmid
->slot
)
2339 return hp
->hook
.setprocattr(name
, value
, size
);
2341 return LSM_RET_DEFAULT(setprocattr
);
2344 int security_netlink_send(struct sock
*sk
, struct sk_buff
*skb
)
2346 return call_int_hook(netlink_send
, 0, sk
, skb
);
2349 int security_ismaclabel(const char *name
)
2351 return call_int_hook(ismaclabel
, 0, name
);
2353 EXPORT_SYMBOL(security_ismaclabel
);
2355 int security_secid_to_secctx(struct lsmblob
*blob
, struct lsmcontext
*cp
,
2358 struct security_hook_list
*hp
;
2360 memset(cp
, 0, sizeof(*cp
));
2363 * display either is the slot number use for formatting
2364 * or an instruction on which relative slot to use.
2366 if (display
== LSMBLOB_DISPLAY
)
2367 display
= lsm_task_display(current
);
2368 else if (display
== LSMBLOB_FIRST
)
2369 display
= LSMBLOB_INVALID
;
2370 else if (display
< 0) {
2372 "LSM: %s unknown display\n", __func__
);
2373 display
= LSMBLOB_INVALID
;
2374 } else if (display
>= lsm_slot
) {
2376 "LSM: %s invalid display\n", __func__
);
2377 display
= LSMBLOB_INVALID
;
2381 hlist_for_each_entry(hp
, &security_hook_heads
.secid_to_secctx
, list
) {
2382 if (WARN_ON(hp
->lsmid
->slot
< 0 || hp
->lsmid
->slot
>= lsm_slot
))
2384 if (display
== LSMBLOB_INVALID
|| display
== hp
->lsmid
->slot
) {
2385 cp
->slot
= hp
->lsmid
->slot
;
2386 return hp
->hook
.secid_to_secctx(
2387 blob
->secid
[hp
->lsmid
->slot
],
2388 &cp
->context
, &cp
->len
);
2392 return LSM_RET_DEFAULT(secid_to_secctx
);
2394 EXPORT_SYMBOL(security_secid_to_secctx
);
2396 int security_secctx_to_secid(const char *secdata
, u32 seclen
,
2397 struct lsmblob
*blob
)
2399 struct security_hook_list
*hp
;
2400 int display
= lsm_task_display(current
);
2402 lsmblob_init(blob
, 0);
2403 hlist_for_each_entry(hp
, &security_hook_heads
.secctx_to_secid
, list
) {
2404 if (WARN_ON(hp
->lsmid
->slot
< 0 || hp
->lsmid
->slot
>= lsm_slot
))
2406 if (display
== LSMBLOB_INVALID
|| display
== hp
->lsmid
->slot
)
2407 return hp
->hook
.secctx_to_secid(secdata
, seclen
,
2408 &blob
->secid
[hp
->lsmid
->slot
]);
2412 EXPORT_SYMBOL(security_secctx_to_secid
);
2414 void security_release_secctx(struct lsmcontext
*cp
)
2416 struct security_hook_list
*hp
;
2418 hlist_for_each_entry(hp
, &security_hook_heads
.release_secctx
, list
)
2419 if (cp
->slot
== hp
->lsmid
->slot
) {
2420 hp
->hook
.release_secctx(cp
->context
, cp
->len
);
2424 memset(cp
, 0, sizeof(*cp
));
2426 EXPORT_SYMBOL(security_release_secctx
);
2428 void security_inode_invalidate_secctx(struct inode
*inode
)
2430 call_void_hook(inode_invalidate_secctx
, inode
);
2432 EXPORT_SYMBOL(security_inode_invalidate_secctx
);
2434 int security_inode_notifysecctx(struct inode
*inode
, void *ctx
, u32 ctxlen
)
2436 return call_int_hook(inode_notifysecctx
, 0, inode
, ctx
, ctxlen
);
2438 EXPORT_SYMBOL(security_inode_notifysecctx
);
2440 int security_inode_setsecctx(struct dentry
*dentry
, void *ctx
, u32 ctxlen
)
2442 return call_int_hook(inode_setsecctx
, 0, dentry
, ctx
, ctxlen
);
2444 EXPORT_SYMBOL(security_inode_setsecctx
);
2446 int security_inode_getsecctx(struct inode
*inode
, struct lsmcontext
*cp
)
2448 struct security_hook_list
*hp
;
2450 memset(cp
, 0, sizeof(*cp
));
2452 hlist_for_each_entry(hp
, &security_hook_heads
.inode_getsecctx
, list
) {
2453 cp
->slot
= hp
->lsmid
->slot
;
2454 return hp
->hook
.inode_getsecctx(inode
, (void **)&cp
->context
,
2459 EXPORT_SYMBOL(security_inode_getsecctx
);
2461 #ifdef CONFIG_WATCH_QUEUE
2462 int security_post_notification(const struct cred
*w_cred
,
2463 const struct cred
*cred
,
2464 struct watch_notification
*n
)
2466 return call_int_hook(post_notification
, 0, w_cred
, cred
, n
);
2468 #endif /* CONFIG_WATCH_QUEUE */
2470 #ifdef CONFIG_KEY_NOTIFICATIONS
2471 int security_watch_key(struct key
*key
)
2473 return call_int_hook(watch_key
, 0, key
);
2477 #ifdef CONFIG_SECURITY_NETWORK
2479 int security_unix_stream_connect(struct sock
*sock
, struct sock
*other
, struct sock
*newsk
)
2481 return call_int_hook(unix_stream_connect
, 0, sock
, other
, newsk
);
2483 EXPORT_SYMBOL(security_unix_stream_connect
);
2485 int security_unix_may_send(struct socket
*sock
, struct socket
*other
)
2487 return call_int_hook(unix_may_send
, 0, sock
, other
);
2489 EXPORT_SYMBOL(security_unix_may_send
);
2491 int security_socket_create(int family
, int type
, int protocol
, int kern
)
2493 return call_int_hook(socket_create
, 0, family
, type
, protocol
, kern
);
2496 int security_socket_post_create(struct socket
*sock
, int family
,
2497 int type
, int protocol
, int kern
)
2499 return call_int_hook(socket_post_create
, 0, sock
, family
, type
,
2503 int security_socket_socketpair(struct socket
*socka
, struct socket
*sockb
)
2505 return call_int_hook(socket_socketpair
, 0, socka
, sockb
);
2507 EXPORT_SYMBOL(security_socket_socketpair
);
2509 int security_socket_bind(struct socket
*sock
, struct sockaddr
*address
, int addrlen
)
2511 return call_int_hook(socket_bind
, 0, sock
, address
, addrlen
);
2514 int security_socket_connect(struct socket
*sock
, struct sockaddr
*address
, int addrlen
)
2516 return call_int_hook(socket_connect
, 0, sock
, address
, addrlen
);
2519 int security_socket_listen(struct socket
*sock
, int backlog
)
2521 return call_int_hook(socket_listen
, 0, sock
, backlog
);
2524 int security_socket_accept(struct socket
*sock
, struct socket
*newsock
)
2526 return call_int_hook(socket_accept
, 0, sock
, newsock
);
2529 int security_socket_sendmsg(struct socket
*sock
, struct msghdr
*msg
, int size
)
2531 return call_int_hook(socket_sendmsg
, 0, sock
, msg
, size
);
2534 int security_socket_recvmsg(struct socket
*sock
, struct msghdr
*msg
,
2535 int size
, int flags
)
2537 return call_int_hook(socket_recvmsg
, 0, sock
, msg
, size
, flags
);
2540 int security_socket_getsockname(struct socket
*sock
)
2542 return call_int_hook(socket_getsockname
, 0, sock
);
2545 int security_socket_getpeername(struct socket
*sock
)
2547 return call_int_hook(socket_getpeername
, 0, sock
);
2550 int security_socket_getsockopt(struct socket
*sock
, int level
, int optname
)
2552 return call_int_hook(socket_getsockopt
, 0, sock
, level
, optname
);
2555 int security_socket_setsockopt(struct socket
*sock
, int level
, int optname
)
2557 return call_int_hook(socket_setsockopt
, 0, sock
, level
, optname
);
2560 int security_socket_shutdown(struct socket
*sock
, int how
)
2562 return call_int_hook(socket_shutdown
, 0, sock
, how
);
2565 int security_sock_rcv_skb(struct sock
*sk
, struct sk_buff
*skb
)
2567 return call_int_hook(socket_sock_rcv_skb
, 0, sk
, skb
);
2569 EXPORT_SYMBOL(security_sock_rcv_skb
);
2571 int security_socket_getpeersec_stream(struct socket
*sock
, char __user
*optval
,
2572 int __user
*optlen
, unsigned len
)
2574 int display
= lsm_task_display(current
);
2575 struct security_hook_list
*hp
;
2577 hlist_for_each_entry(hp
, &security_hook_heads
.socket_getpeersec_stream
,
2579 if (display
== LSMBLOB_INVALID
|| display
== hp
->lsmid
->slot
)
2580 return hp
->hook
.socket_getpeersec_stream(sock
, optval
,
2582 return -ENOPROTOOPT
;
2585 int security_socket_getpeersec_dgram(struct socket
*sock
, struct sk_buff
*skb
,
2586 struct lsmblob
*blob
)
2588 struct security_hook_list
*hp
;
2589 int rc
= -ENOPROTOOPT
;
2591 hlist_for_each_entry(hp
, &security_hook_heads
.socket_getpeersec_dgram
,
2593 if (WARN_ON(hp
->lsmid
->slot
< 0 || hp
->lsmid
->slot
>= lsm_slot
))
2595 rc
= hp
->hook
.socket_getpeersec_dgram(sock
, skb
,
2596 &blob
->secid
[hp
->lsmid
->slot
]);
2602 EXPORT_SYMBOL(security_socket_getpeersec_dgram
);
2604 int security_sk_alloc(struct sock
*sk
, int family
, gfp_t priority
)
2606 int rc
= lsm_sock_alloc(sk
, priority
);
2610 rc
= call_int_hook(sk_alloc_security
, 0, sk
, family
, priority
);
2612 security_sk_free(sk
);
2616 void security_sk_free(struct sock
*sk
)
2618 call_void_hook(sk_free_security
, sk
);
2619 kfree(sk
->sk_security
);
2620 sk
->sk_security
= NULL
;
2623 void security_sk_clone(const struct sock
*sk
, struct sock
*newsk
)
2625 call_void_hook(sk_clone_security
, sk
, newsk
);
2627 EXPORT_SYMBOL(security_sk_clone
);
2629 void security_sk_classify_flow(struct sock
*sk
, struct flowi_common
*flic
)
2631 call_void_hook(sk_getsecid
, sk
, &flic
->flowic_secid
);
2633 EXPORT_SYMBOL(security_sk_classify_flow
);
2635 void security_req_classify_flow(const struct request_sock
*req
,
2636 struct flowi_common
*flic
)
2638 call_void_hook(req_classify_flow
, req
, flic
);
2640 EXPORT_SYMBOL(security_req_classify_flow
);
2642 void security_sock_graft(struct sock
*sk
, struct socket
*parent
)
2644 call_void_hook(sock_graft
, sk
, parent
);
2646 EXPORT_SYMBOL(security_sock_graft
);
2648 int security_inet_conn_request(const struct sock
*sk
,
2649 struct sk_buff
*skb
, struct request_sock
*req
)
2651 return call_int_hook(inet_conn_request
, 0, sk
, skb
, req
);
2653 EXPORT_SYMBOL(security_inet_conn_request
);
2655 void security_inet_csk_clone(struct sock
*newsk
,
2656 const struct request_sock
*req
)
2658 call_void_hook(inet_csk_clone
, newsk
, req
);
2661 void security_inet_conn_established(struct sock
*sk
,
2662 struct sk_buff
*skb
)
2664 call_void_hook(inet_conn_established
, sk
, skb
);
2666 EXPORT_SYMBOL(security_inet_conn_established
);
2668 int security_secmark_relabel_packet(struct lsmblob
*blob
)
2670 struct security_hook_list
*hp
;
2673 hlist_for_each_entry(hp
, &security_hook_heads
.secmark_relabel_packet
,
2675 if (WARN_ON(hp
->lsmid
->slot
< 0 || hp
->lsmid
->slot
>= lsm_slot
))
2677 rc
= hp
->hook
.secmark_relabel_packet(
2678 blob
->secid
[hp
->lsmid
->slot
]);
2684 EXPORT_SYMBOL(security_secmark_relabel_packet
);
2686 void security_secmark_refcount_inc(void)
2688 call_void_hook(secmark_refcount_inc
);
2690 EXPORT_SYMBOL(security_secmark_refcount_inc
);
2692 void security_secmark_refcount_dec(void)
2694 call_void_hook(secmark_refcount_dec
);
2696 EXPORT_SYMBOL(security_secmark_refcount_dec
);
2698 int security_tun_dev_alloc_security(void **security
)
2700 return call_int_hook(tun_dev_alloc_security
, 0, security
);
2702 EXPORT_SYMBOL(security_tun_dev_alloc_security
);
2704 void security_tun_dev_free_security(void *security
)
2706 call_void_hook(tun_dev_free_security
, security
);
2708 EXPORT_SYMBOL(security_tun_dev_free_security
);
2710 int security_tun_dev_create(void)
2712 return call_int_hook(tun_dev_create
, 0);
2714 EXPORT_SYMBOL(security_tun_dev_create
);
2716 int security_tun_dev_attach_queue(void *security
)
2718 return call_int_hook(tun_dev_attach_queue
, 0, security
);
2720 EXPORT_SYMBOL(security_tun_dev_attach_queue
);
2722 int security_tun_dev_attach(struct sock
*sk
, void *security
)
2724 return call_int_hook(tun_dev_attach
, 0, sk
, security
);
2726 EXPORT_SYMBOL(security_tun_dev_attach
);
2728 int security_tun_dev_open(void *security
)
2730 return call_int_hook(tun_dev_open
, 0, security
);
2732 EXPORT_SYMBOL(security_tun_dev_open
);
2734 int security_sctp_assoc_request(struct sctp_endpoint
*ep
, struct sk_buff
*skb
)
2736 return call_int_hook(sctp_assoc_request
, 0, ep
, skb
);
2738 EXPORT_SYMBOL(security_sctp_assoc_request
);
2740 int security_sctp_bind_connect(struct sock
*sk
, int optname
,
2741 struct sockaddr
*address
, int addrlen
)
2743 return call_int_hook(sctp_bind_connect
, 0, sk
, optname
,
2746 EXPORT_SYMBOL(security_sctp_bind_connect
);
2748 void security_sctp_sk_clone(struct sctp_endpoint
*ep
, struct sock
*sk
,
2751 call_void_hook(sctp_sk_clone
, ep
, sk
, newsk
);
2753 EXPORT_SYMBOL(security_sctp_sk_clone
);
2755 #endif /* CONFIG_SECURITY_NETWORK */
2757 #ifdef CONFIG_SECURITY_INFINIBAND
2759 int security_ib_pkey_access(void *sec
, u64 subnet_prefix
, u16 pkey
)
2761 return call_int_hook(ib_pkey_access
, 0, sec
, subnet_prefix
, pkey
);
2763 EXPORT_SYMBOL(security_ib_pkey_access
);
2765 int security_ib_endport_manage_subnet(void *sec
, const char *dev_name
, u8 port_num
)
2767 return call_int_hook(ib_endport_manage_subnet
, 0, sec
, dev_name
, port_num
);
2769 EXPORT_SYMBOL(security_ib_endport_manage_subnet
);
2771 int security_ib_alloc_security(void **sec
)
2773 return call_int_hook(ib_alloc_security
, 0, sec
);
2775 EXPORT_SYMBOL(security_ib_alloc_security
);
2777 void security_ib_free_security(void *sec
)
2779 call_void_hook(ib_free_security
, sec
);
2781 EXPORT_SYMBOL(security_ib_free_security
);
2782 #endif /* CONFIG_SECURITY_INFINIBAND */
2784 #ifdef CONFIG_SECURITY_NETWORK_XFRM
2786 int security_xfrm_policy_alloc(struct xfrm_sec_ctx
**ctxp
,
2787 struct xfrm_user_sec_ctx
*sec_ctx
,
2790 return call_int_hook(xfrm_policy_alloc_security
, 0, ctxp
, sec_ctx
, gfp
);
2792 EXPORT_SYMBOL(security_xfrm_policy_alloc
);
2794 int security_xfrm_policy_clone(struct xfrm_sec_ctx
*old_ctx
,
2795 struct xfrm_sec_ctx
**new_ctxp
)
2797 return call_int_hook(xfrm_policy_clone_security
, 0, old_ctx
, new_ctxp
);
2800 void security_xfrm_policy_free(struct xfrm_sec_ctx
*ctx
)
2802 call_void_hook(xfrm_policy_free_security
, ctx
);
2804 EXPORT_SYMBOL(security_xfrm_policy_free
);
2806 int security_xfrm_policy_delete(struct xfrm_sec_ctx
*ctx
)
2808 return call_int_hook(xfrm_policy_delete_security
, 0, ctx
);
2811 int security_xfrm_state_alloc(struct xfrm_state
*x
,
2812 struct xfrm_user_sec_ctx
*sec_ctx
)
2814 return call_int_hook(xfrm_state_alloc
, 0, x
, sec_ctx
);
2816 EXPORT_SYMBOL(security_xfrm_state_alloc
);
2818 int security_xfrm_state_alloc_acquire(struct xfrm_state
*x
,
2819 struct xfrm_sec_ctx
*polsec
, u32 secid
)
2821 return call_int_hook(xfrm_state_alloc_acquire
, 0, x
, polsec
, secid
);
2824 int security_xfrm_state_delete(struct xfrm_state
*x
)
2826 return call_int_hook(xfrm_state_delete_security
, 0, x
);
2828 EXPORT_SYMBOL(security_xfrm_state_delete
);
2830 void security_xfrm_state_free(struct xfrm_state
*x
)
2832 call_void_hook(xfrm_state_free_security
, x
);
2835 int security_xfrm_policy_lookup(struct xfrm_sec_ctx
*ctx
, u32 fl_secid
, u8 dir
)
2837 return call_int_hook(xfrm_policy_lookup
, 0, ctx
, fl_secid
, dir
);
2840 int security_xfrm_state_pol_flow_match(struct xfrm_state
*x
,
2841 struct xfrm_policy
*xp
,
2842 const struct flowi_common
*flic
)
2844 struct security_hook_list
*hp
;
2845 int rc
= LSM_RET_DEFAULT(xfrm_state_pol_flow_match
);
2848 * Since this function is expected to return 0 or 1, the judgment
2849 * becomes difficult if multiple LSMs supply this call. Fortunately,
2850 * we can use the first LSM's judgment because currently only SELinux
2851 * supplies this call.
2853 * For speed optimization, we explicitly break the loop rather than
2856 hlist_for_each_entry(hp
, &security_hook_heads
.xfrm_state_pol_flow_match
,
2858 rc
= hp
->hook
.xfrm_state_pol_flow_match(x
, xp
, flic
);
2864 int security_xfrm_decode_session(struct sk_buff
*skb
, u32
*secid
)
2866 return call_int_hook(xfrm_decode_session
, 0, skb
, secid
, 1);
2869 void security_skb_classify_flow(struct sk_buff
*skb
, struct flowi_common
*flic
)
2871 int rc
= call_int_hook(xfrm_decode_session
, 0, skb
, &flic
->flowic_secid
,
2876 EXPORT_SYMBOL(security_skb_classify_flow
);
2878 #endif /* CONFIG_SECURITY_NETWORK_XFRM */
2882 int security_key_alloc(struct key
*key
, const struct cred
*cred
,
2883 unsigned long flags
)
2885 return call_int_hook(key_alloc
, 0, key
, cred
, flags
);
2888 void security_key_free(struct key
*key
)
2890 call_void_hook(key_free
, key
);
2893 int security_key_permission(key_ref_t key_ref
, const struct cred
*cred
,
2894 enum key_need_perm need_perm
)
2896 return call_int_hook(key_permission
, 0, key_ref
, cred
, need_perm
);
2899 int security_key_getsecurity(struct key
*key
, char **_buffer
)
2902 return call_int_hook(key_getsecurity
, 0, key
, _buffer
);
2905 #endif /* CONFIG_KEYS */
2909 int security_audit_rule_init(u32 field
, u32 op
, char *rulestr
, void **lsmrule
)
2911 struct security_hook_list
*hp
;
2912 int display
= lsm_task_display(current
);
2914 hlist_for_each_entry(hp
, &security_hook_heads
.audit_rule_init
, list
) {
2915 if (WARN_ON(hp
->lsmid
->slot
< 0 || hp
->lsmid
->slot
>= lsm_slot
))
2917 if (display
!= LSMBLOB_INVALID
&& display
!= hp
->lsmid
->slot
)
2919 return hp
->hook
.audit_rule_init(field
, op
, rulestr
,
2920 &lsmrule
[hp
->lsmid
->slot
]);
2925 int security_audit_rule_known(struct audit_krule
*krule
)
2927 return call_int_hook(audit_rule_known
, 0, krule
);
2930 void security_audit_rule_free(void **lsmrule
)
2932 struct security_hook_list
*hp
;
2934 hlist_for_each_entry(hp
, &security_hook_heads
.audit_rule_free
, list
) {
2935 if (WARN_ON(hp
->lsmid
->slot
< 0 || hp
->lsmid
->slot
>= lsm_slot
))
2937 if (lsmrule
[hp
->lsmid
->slot
] == NULL
)
2939 hp
->hook
.audit_rule_free(lsmrule
[hp
->lsmid
->slot
]);
2943 int security_audit_rule_match(struct lsmblob
*blob
, u32 field
, u32 op
,
2946 struct security_hook_list
*hp
;
2949 hlist_for_each_entry(hp
, &security_hook_heads
.audit_rule_match
, list
) {
2950 if (WARN_ON(hp
->lsmid
->slot
< 0 || hp
->lsmid
->slot
>= lsm_slot
))
2952 if (lsmrule
[hp
->lsmid
->slot
] == NULL
)
2954 if (lsmrule
[hp
->lsmid
->slot
] == NULL
)
2956 rc
= hp
->hook
.audit_rule_match(blob
->secid
[hp
->lsmid
->slot
],
2958 &lsmrule
[hp
->lsmid
->slot
]);
2964 #endif /* CONFIG_AUDIT */
2966 #ifdef CONFIG_BPF_SYSCALL
2967 int security_bpf(int cmd
, union bpf_attr
*attr
, unsigned int size
)
2969 return call_int_hook(bpf
, 0, cmd
, attr
, size
);
2971 int security_bpf_map(struct bpf_map
*map
, fmode_t fmode
)
2973 return call_int_hook(bpf_map
, 0, map
, fmode
);
2975 int security_bpf_prog(struct bpf_prog
*prog
)
2977 return call_int_hook(bpf_prog
, 0, prog
);
2979 int security_bpf_map_alloc(struct bpf_map
*map
)
2981 return call_int_hook(bpf_map_alloc_security
, 0, map
);
2983 int security_bpf_prog_alloc(struct bpf_prog_aux
*aux
)
2985 return call_int_hook(bpf_prog_alloc_security
, 0, aux
);
2987 void security_bpf_map_free(struct bpf_map
*map
)
2989 call_void_hook(bpf_map_free_security
, map
);
2991 void security_bpf_prog_free(struct bpf_prog_aux
*aux
)
2993 call_void_hook(bpf_prog_free_security
, aux
);
2995 #endif /* CONFIG_BPF_SYSCALL */
2997 int security_locked_down(enum lockdown_reason what
)
2999 return call_int_hook(locked_down
, 0, what
);
3001 EXPORT_SYMBOL(security_locked_down
);
3003 int security_lock_kernel_down(const char *where
, enum lockdown_reason level
)
3005 return call_int_hook(lock_kernel_down
, 0, where
, level
);
3007 EXPORT_SYMBOL(security_lock_kernel_down
);
3009 #ifdef CONFIG_PERF_EVENTS
3010 int security_perf_event_open(struct perf_event_attr
*attr
, int type
)
3012 return call_int_hook(perf_event_open
, 0, attr
, type
);
3015 int security_perf_event_alloc(struct perf_event
*event
)
3017 return call_int_hook(perf_event_alloc
, 0, event
);
3020 void security_perf_event_free(struct perf_event
*event
)
3022 call_void_hook(perf_event_free
, event
);
3025 int security_perf_event_read(struct perf_event
*event
)
3027 return call_int_hook(perf_event_read
, 0, event
);
3030 int security_perf_event_write(struct perf_event
*event
)
3032 return call_int_hook(perf_event_write
, 0, event
);
3034 #endif /* CONFIG_PERF_EVENTS */