projects/linux·blob v5.18 · refs

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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Security plug functions
4 *
5 * Copyright (C) 2001 WireX Communications, Inc <[email protected]>
6 * Copyright (C) 2001-2002 Greg Kroah-Hartman <[email protected]>
7 * Copyright (C) 2001 Networks Associates Technology, Inc <[email protected]>
8 * Copyright (C) 2016 Mellanox Technologies
9 */
10
11#define pr_fmt(fmt) "LSM: " fmt
12
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>
31#include <net/flow.h>
32
33#define MAX_LSM_EVM_XATTR 2
34
35/* How many LSMs were built into the kernel? */
36#define LSM_COUNT (__end_lsm_info - __start_lsm_info)
37
38/*
39 * These are descriptions of the reasons that can be passed to the
40 * security_locked_down() LSM hook. Placing this array here allows
41 * all security modules to use the same descriptions for auditing
42 * purposes.
43 */
44const char *const lockdown_reasons[LOCKDOWN_CONFIDENTIALITY_MAX+1] = {
45 [LOCKDOWN_NONE] = "none",
46 [LOCKDOWN_MODULE_SIGNATURE] = "unsigned module loading",
47 [LOCKDOWN_DEV_MEM] = "/dev/mem,kmem,port",
48 [LOCKDOWN_EFI_TEST] = "/dev/efi_test access",
49 [LOCKDOWN_KEXEC] = "kexec of unsigned images",
50 [LOCKDOWN_HIBERNATION] = "hibernation",
51 [LOCKDOWN_PCI_ACCESS] = "direct PCI access",
52 [LOCKDOWN_IOPORT] = "raw io port access",
53 [LOCKDOWN_MSR] = "raw MSR access",
54 [LOCKDOWN_ACPI_TABLES] = "modifying ACPI tables",
55 [LOCKDOWN_PCMCIA_CIS] = "direct PCMCIA CIS storage",
56 [LOCKDOWN_TIOCSSERIAL] = "reconfiguration of serial port IO",
57 [LOCKDOWN_MODULE_PARAMETERS] = "unsafe module parameters",
58 [LOCKDOWN_MMIOTRACE] = "unsafe mmio",
59 [LOCKDOWN_DEBUGFS] = "debugfs access",
60 [LOCKDOWN_XMON_WR] = "xmon write access",
61 [LOCKDOWN_BPF_WRITE_USER] = "use of bpf to write user RAM",
62 [LOCKDOWN_INTEGRITY_MAX] = "integrity",
63 [LOCKDOWN_KCORE] = "/proc/kcore access",
64 [LOCKDOWN_KPROBES] = "use of kprobes",
65 [LOCKDOWN_BPF_READ_KERNEL] = "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",
71};
72
73struct security_hook_heads security_hook_heads __lsm_ro_after_init;
74static BLOCKING_NOTIFIER_HEAD(blocking_lsm_notifier_chain);
75
76static struct kmem_cache *lsm_file_cache;
77static struct kmem_cache *lsm_inode_cache;
78
79char *lsm_names;
80static struct lsm_blob_sizes blob_sizes __lsm_ro_after_init;
81
82/* Boot-time LSM user choice */
83static __initdata const char *chosen_lsm_order;
84static __initdata const char *chosen_major_lsm;
85
86static __initconst const char * const builtin_lsm_order = CONFIG_LSM;
87
88/* Ordered list of LSMs to initialize. */
89static __initdata struct lsm_info **ordered_lsms;
90static __initdata struct lsm_info *exclusive;
91
92static __initdata bool debug;
93#define init_debug(...) \
94 do { \
95 if (debug) \
96 pr_info(__VA_ARGS__); \
97 } while (0)
98
99static bool __init is_enabled(struct lsm_info *lsm)
100{
101 if (!lsm->enabled)
102 return false;
103
104 return *lsm->enabled;
105}
106
107/* Mark an LSM's enabled flag. */
108static int lsm_enabled_true __initdata = 1;
109static int lsm_enabled_false __initdata = 0;
110static void __init set_enabled(struct lsm_info *lsm, bool enabled)
111{
112 /*
113 * When an LSM hasn't configured an enable variable, we can use
114 * a hard-coded location for storing the default enabled state.
115 */
116 if (!lsm->enabled) {
117 if (enabled)
118 lsm->enabled = &lsm_enabled_true;
119 else
120 lsm->enabled = &lsm_enabled_false;
121 } else if (lsm->enabled == &lsm_enabled_true) {
122 if (!enabled)
123 lsm->enabled = &lsm_enabled_false;
124 } else if (lsm->enabled == &lsm_enabled_false) {
125 if (enabled)
126 lsm->enabled = &lsm_enabled_true;
127 } else {
128 *lsm->enabled = enabled;
129 }
130}
131
132/* Is an LSM already listed in the ordered LSMs list? */
133static bool __init exists_ordered_lsm(struct lsm_info *lsm)
134{
135 struct lsm_info **check;
136
137 for (check = ordered_lsms; *check; check++)
138 if (*check == lsm)
139 return true;
140
141 return false;
142}
143
144/* Append an LSM to the list of ordered LSMs to initialize. */
145static int last_lsm __initdata;
146static void __init append_ordered_lsm(struct lsm_info *lsm, const char *from)
147{
148 /* Ignore duplicate selections. */
149 if (exists_ordered_lsm(lsm))
150 return;
151
152 if (WARN(last_lsm == LSM_COUNT, "%s: out of LSM slots!?\n", from))
153 return;
154
155 /* Enable this LSM, if it is not already set. */
156 if (!lsm->enabled)
157 lsm->enabled = &lsm_enabled_true;
158 ordered_lsms[last_lsm++] = lsm;
159
160 init_debug("%s ordering: %s (%sabled)\n", from, lsm->name,
161 is_enabled(lsm) ? "en" : "dis");
162}
163
164/* Is an LSM allowed to be initialized? */
165static bool __init lsm_allowed(struct lsm_info *lsm)
166{
167 /* Skip if the LSM is disabled. */
168 if (!is_enabled(lsm))
169 return false;
170
171 /* Not allowed if another exclusive LSM already initialized. */
172 if ((lsm->flags & LSM_FLAG_EXCLUSIVE) && exclusive) {
173 init_debug("exclusive disabled: %s\n", lsm->name);
174 return false;
175 }
176
177 return true;
178}
179
180static void __init lsm_set_blob_size(int *need, int *lbs)
181{
182 int offset;
183
184 if (*need > 0) {
185 offset = *lbs;
186 *lbs += *need;
187 *need = offset;
188 }
189}
190
191static void __init lsm_set_blob_sizes(struct lsm_blob_sizes *needed)
192{
193 if (!needed)
194 return;
195
196 lsm_set_blob_size(&needed->lbs_cred, &blob_sizes.lbs_cred);
197 lsm_set_blob_size(&needed->lbs_file, &blob_sizes.lbs_file);
198 /*
199 * The inode blob gets an rcu_head in addition to
200 * what the modules might need.
201 */
202 if (needed->lbs_inode && blob_sizes.lbs_inode == 0)
203 blob_sizes.lbs_inode = sizeof(struct rcu_head);
204 lsm_set_blob_size(&needed->lbs_inode, &blob_sizes.lbs_inode);
205 lsm_set_blob_size(&needed->lbs_ipc, &blob_sizes.lbs_ipc);
206 lsm_set_blob_size(&needed->lbs_msg_msg, &blob_sizes.lbs_msg_msg);
207 lsm_set_blob_size(&needed->lbs_superblock, &blob_sizes.lbs_superblock);
208 lsm_set_blob_size(&needed->lbs_task, &blob_sizes.lbs_task);
209}
210
211/* Prepare LSM for initialization. */
212static void __init prepare_lsm(struct lsm_info *lsm)
213{
214 int enabled = lsm_allowed(lsm);
215
216 /* Record enablement (to handle any following exclusive LSMs). */
217 set_enabled(lsm, enabled);
218
219 /* If enabled, do pre-initialization work. */
220 if (enabled) {
221 if ((lsm->flags & LSM_FLAG_EXCLUSIVE) && !exclusive) {
222 exclusive = lsm;
223 init_debug("exclusive chosen: %s\n", lsm->name);
224 }
225
226 lsm_set_blob_sizes(lsm->blobs);
227 }
228}
229
230/* Initialize a given LSM, if it is enabled. */
231static void __init initialize_lsm(struct lsm_info *lsm)
232{
233 if (is_enabled(lsm)) {
234 int ret;
235
236 init_debug("initializing %s\n", lsm->name);
237 ret = lsm->init();
238 WARN(ret, "%s failed to initialize: %d\n", lsm->name, ret);
239 }
240}
241
242/* Populate ordered LSMs list from comma-separated LSM name list. */
243static void __init ordered_lsm_parse(const char *order, const char *origin)
244{
245 struct lsm_info *lsm;
246 char *sep, *name, *next;
247
248 /* LSM_ORDER_FIRST is always first. */
249 for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) {
250 if (lsm->order == LSM_ORDER_FIRST)
251 append_ordered_lsm(lsm, "first");
252 }
253
254 /* Process "security=", if given. */
255 if (chosen_major_lsm) {
256 struct lsm_info *major;
257
258 /*
259 * To match the original "security=" behavior, this
260 * explicitly does NOT fallback to another Legacy Major
261 * if the selected one was separately disabled: disable
262 * all non-matching Legacy Major LSMs.
263 */
264 for (major = __start_lsm_info; major < __end_lsm_info;
265 major++) {
266 if ((major->flags & LSM_FLAG_LEGACY_MAJOR) &&
267 strcmp(major->name, chosen_major_lsm) != 0) {
268 set_enabled(major, false);
269 init_debug("security=%s disabled: %s\n",
270 chosen_major_lsm, major->name);
271 }
272 }
273 }
274
275 sep = kstrdup(order, GFP_KERNEL);
276 next = sep;
277 /* Walk the list, looking for matching LSMs. */
278 while ((name = strsep(&next, ",")) != NULL) {
279 bool found = false;
280
281 for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) {
282 if (lsm->order == LSM_ORDER_MUTABLE &&
283 strcmp(lsm->name, name) == 0) {
284 append_ordered_lsm(lsm, origin);
285 found = true;
286 }
287 }
288
289 if (!found)
290 init_debug("%s ignored: %s\n", origin, name);
291 }
292
293 /* Process "security=", if given. */
294 if (chosen_major_lsm) {
295 for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) {
296 if (exists_ordered_lsm(lsm))
297 continue;
298 if (strcmp(lsm->name, chosen_major_lsm) == 0)
299 append_ordered_lsm(lsm, "security=");
300 }
301 }
302
303 /* Disable all LSMs not in the ordered list. */
304 for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) {
305 if (exists_ordered_lsm(lsm))
306 continue;
307 set_enabled(lsm, false);
308 init_debug("%s disabled: %s\n", origin, lsm->name);
309 }
310
311 kfree(sep);
312}
313
314static void __init lsm_early_cred(struct cred *cred);
315static void __init lsm_early_task(struct task_struct *task);
316
317static int lsm_append(const char *new, char **result);
318
319static void __init ordered_lsm_init(void)
320{
321 struct lsm_info **lsm;
322
323 ordered_lsms = kcalloc(LSM_COUNT + 1, sizeof(*ordered_lsms),
324 GFP_KERNEL);
325
326 if (chosen_lsm_order) {
327 if (chosen_major_lsm) {
328 pr_info("security= is ignored because it is superseded by lsm=\n");
329 chosen_major_lsm = NULL;
330 }
331 ordered_lsm_parse(chosen_lsm_order, "cmdline");
332 } else
333 ordered_lsm_parse(builtin_lsm_order, "builtin");
334
335 for (lsm = ordered_lsms; *lsm; lsm++)
336 prepare_lsm(*lsm);
337
338 init_debug("cred blob size = %d\n", blob_sizes.lbs_cred);
339 init_debug("file blob size = %d\n", blob_sizes.lbs_file);
340 init_debug("inode blob size = %d\n", blob_sizes.lbs_inode);
341 init_debug("ipc blob size = %d\n", blob_sizes.lbs_ipc);
342 init_debug("msg_msg blob size = %d\n", blob_sizes.lbs_msg_msg);
343 init_debug("superblock blob size = %d\n", blob_sizes.lbs_superblock);
344 init_debug("task blob size = %d\n", blob_sizes.lbs_task);
345
346 /*
347 * Create any kmem_caches needed for blobs
348 */
349 if (blob_sizes.lbs_file)
350 lsm_file_cache = kmem_cache_create("lsm_file_cache",
351 blob_sizes.lbs_file, 0,
352 SLAB_PANIC, NULL);
353 if (blob_sizes.lbs_inode)
354 lsm_inode_cache = kmem_cache_create("lsm_inode_cache",
355 blob_sizes.lbs_inode, 0,
356 SLAB_PANIC, NULL);
357
358 lsm_early_cred((struct cred *) current->cred);
359 lsm_early_task(current);
360 for (lsm = ordered_lsms; *lsm; lsm++)
361 initialize_lsm(*lsm);
362
363 kfree(ordered_lsms);
364}
365
366int __init early_security_init(void)
367{
368 int i;
369 struct hlist_head *list = (struct hlist_head *) &security_hook_heads;
370 struct lsm_info *lsm;
371
372 for (i = 0; i < sizeof(security_hook_heads) / sizeof(struct hlist_head);
373 i++)
374 INIT_HLIST_HEAD(&list[i]);
375
376 for (lsm = __start_early_lsm_info; lsm < __end_early_lsm_info; lsm++) {
377 if (!lsm->enabled)
378 lsm->enabled = &lsm_enabled_true;
379 prepare_lsm(lsm);
380 initialize_lsm(lsm);
381 }
382
383 return 0;
384}
385
386/**
387 * security_init - initializes the security framework
388 *
389 * This should be called early in the kernel initialization sequence.
390 */
391int __init security_init(void)
392{
393 struct lsm_info *lsm;
394
395 pr_info("Security Framework initializing\n");
396
397 /*
398 * Append the names of the early LSM modules now that kmalloc() is
399 * available
400 */
401 for (lsm = __start_early_lsm_info; lsm < __end_early_lsm_info; lsm++) {
402 if (lsm->enabled)
403 lsm_append(lsm->name, &lsm_names);
404 }
405
406 /* Load LSMs in specified order. */
407 ordered_lsm_init();
408
409 return 0;
410}
411
412/* Save user chosen LSM */
413static int __init choose_major_lsm(char *str)
414{
415 chosen_major_lsm = str;
416 return 1;
417}
418__setup("security=", choose_major_lsm);
419
420/* Explicitly choose LSM initialization order. */
421static int __init choose_lsm_order(char *str)
422{
423 chosen_lsm_order = str;
424 return 1;
425}
426__setup("lsm=", choose_lsm_order);
427
428/* Enable LSM order debugging. */
429static int __init enable_debug(char *str)
430{
431 debug = true;
432 return 1;
433}
434__setup("lsm.debug", enable_debug);
435
436static bool match_last_lsm(const char *list, const char *lsm)
437{
438 const char *last;
439
440 if (WARN_ON(!list || !lsm))
441 return false;
442 last = strrchr(list, ',');
443 if (last)
444 /* Pass the comma, strcmp() will check for '\0' */
445 last++;
446 else
447 last = list;
448 return !strcmp(last, lsm);
449}
450
451static int lsm_append(const char *new, char **result)
452{
453 char *cp;
454
455 if (*result == NULL) {
456 *result = kstrdup(new, GFP_KERNEL);
457 if (*result == NULL)
458 return -ENOMEM;
459 } else {
460 /* Check if it is the last registered name */
461 if (match_last_lsm(*result, new))
462 return 0;
463 cp = kasprintf(GFP_KERNEL, "%s,%s", *result, new);
464 if (cp == NULL)
465 return -ENOMEM;
466 kfree(*result);
467 *result = cp;
468 }
469 return 0;
470}
471
472/**
473 * security_add_hooks - Add a modules hooks to the hook lists.
474 * @hooks: the hooks to add
475 * @count: the number of hooks to add
476 * @lsm: the name of the security module
477 *
478 * Each LSM has to register its hooks with the infrastructure.
479 */
480void __init security_add_hooks(struct security_hook_list *hooks, int count,
481 char *lsm)
482{
483 int i;
484
485 for (i = 0; i < count; i++) {
486 hooks[i].lsm = lsm;
487 hlist_add_tail_rcu(&hooks[i].list, hooks[i].head);
488 }
489
490 /*
491 * Don't try to append during early_security_init(), we'll come back
492 * and fix this up afterwards.
493 */
494 if (slab_is_available()) {
495 if (lsm_append(lsm, &lsm_names) < 0)
496 panic("%s - Cannot get early memory.\n", __func__);
497 }
498}
499
500int call_blocking_lsm_notifier(enum lsm_event event, void *data)
501{
502 return blocking_notifier_call_chain(&blocking_lsm_notifier_chain,
503 event, data);
504}
505EXPORT_SYMBOL(call_blocking_lsm_notifier);
506
507int register_blocking_lsm_notifier(struct notifier_block *nb)
508{
509 return blocking_notifier_chain_register(&blocking_lsm_notifier_chain,
510 nb);
511}
512EXPORT_SYMBOL(register_blocking_lsm_notifier);
513
514int unregister_blocking_lsm_notifier(struct notifier_block *nb)
515{
516 return blocking_notifier_chain_unregister(&blocking_lsm_notifier_chain,
517 nb);
518}
519EXPORT_SYMBOL(unregister_blocking_lsm_notifier);
520
521/**
522 * lsm_cred_alloc - allocate a composite cred blob
523 * @cred: the cred that needs a blob
524 * @gfp: allocation type
525 *
526 * Allocate the cred blob for all the modules
527 *
528 * Returns 0, or -ENOMEM if memory can't be allocated.
529 */
530static int lsm_cred_alloc(struct cred *cred, gfp_t gfp)
531{
532 if (blob_sizes.lbs_cred == 0) {
533 cred->security = NULL;
534 return 0;
535 }
536
537 cred->security = kzalloc(blob_sizes.lbs_cred, gfp);
538 if (cred->security == NULL)
539 return -ENOMEM;
540 return 0;
541}
542
543/**
544 * lsm_early_cred - during initialization allocate a composite cred blob
545 * @cred: the cred that needs a blob
546 *
547 * Allocate the cred blob for all the modules
548 */
549static void __init lsm_early_cred(struct cred *cred)
550{
551 int rc = lsm_cred_alloc(cred, GFP_KERNEL);
552
553 if (rc)
554 panic("%s: Early cred alloc failed.\n", __func__);
555}
556
557/**
558 * lsm_file_alloc - allocate a composite file blob
559 * @file: the file that needs a blob
560 *
561 * Allocate the file blob for all the modules
562 *
563 * Returns 0, or -ENOMEM if memory can't be allocated.
564 */
565static int lsm_file_alloc(struct file *file)
566{
567 if (!lsm_file_cache) {
568 file->f_security = NULL;
569 return 0;
570 }
571
572 file->f_security = kmem_cache_zalloc(lsm_file_cache, GFP_KERNEL);
573 if (file->f_security == NULL)
574 return -ENOMEM;
575 return 0;
576}
577
578/**
579 * lsm_inode_alloc - allocate a composite inode blob
580 * @inode: the inode that needs a blob
581 *
582 * Allocate the inode blob for all the modules
583 *
584 * Returns 0, or -ENOMEM if memory can't be allocated.
585 */
586int lsm_inode_alloc(struct inode *inode)
587{
588 if (!lsm_inode_cache) {
589 inode->i_security = NULL;
590 return 0;
591 }
592
593 inode->i_security = kmem_cache_zalloc(lsm_inode_cache, GFP_NOFS);
594 if (inode->i_security == NULL)
595 return -ENOMEM;
596 return 0;
597}
598
599/**
600 * lsm_task_alloc - allocate a composite task blob
601 * @task: the task that needs a blob
602 *
603 * Allocate the task blob for all the modules
604 *
605 * Returns 0, or -ENOMEM if memory can't be allocated.
606 */
607static int lsm_task_alloc(struct task_struct *task)
608{
609 if (blob_sizes.lbs_task == 0) {
610 task->security = NULL;
611 return 0;
612 }
613
614 task->security = kzalloc(blob_sizes.lbs_task, GFP_KERNEL);
615 if (task->security == NULL)
616 return -ENOMEM;
617 return 0;
618}
619
620/**
621 * lsm_ipc_alloc - allocate a composite ipc blob
622 * @kip: the ipc that needs a blob
623 *
624 * Allocate the ipc blob for all the modules
625 *
626 * Returns 0, or -ENOMEM if memory can't be allocated.
627 */
628static int lsm_ipc_alloc(struct kern_ipc_perm *kip)
629{
630 if (blob_sizes.lbs_ipc == 0) {
631 kip->security = NULL;
632 return 0;
633 }
634
635 kip->security = kzalloc(blob_sizes.lbs_ipc, GFP_KERNEL);
636 if (kip->security == NULL)
637 return -ENOMEM;
638 return 0;
639}
640
641/**
642 * lsm_msg_msg_alloc - allocate a composite msg_msg blob
643 * @mp: the msg_msg that needs a blob
644 *
645 * Allocate the ipc blob for all the modules
646 *
647 * Returns 0, or -ENOMEM if memory can't be allocated.
648 */
649static int lsm_msg_msg_alloc(struct msg_msg *mp)
650{
651 if (blob_sizes.lbs_msg_msg == 0) {
652 mp->security = NULL;
653 return 0;
654 }
655
656 mp->security = kzalloc(blob_sizes.lbs_msg_msg, GFP_KERNEL);
657 if (mp->security == NULL)
658 return -ENOMEM;
659 return 0;
660}
661
662/**
663 * lsm_early_task - during initialization allocate a composite task blob
664 * @task: the task that needs a blob
665 *
666 * Allocate the task blob for all the modules
667 */
668static void __init lsm_early_task(struct task_struct *task)
669{
670 int rc = lsm_task_alloc(task);
671
672 if (rc)
673 panic("%s: Early task alloc failed.\n", __func__);
674}
675
676/**
677 * lsm_superblock_alloc - allocate a composite superblock blob
678 * @sb: the superblock that needs a blob
679 *
680 * Allocate the superblock blob for all the modules
681 *
682 * Returns 0, or -ENOMEM if memory can't be allocated.
683 */
684static int lsm_superblock_alloc(struct super_block *sb)
685{
686 if (blob_sizes.lbs_superblock == 0) {
687 sb->s_security = NULL;
688 return 0;
689 }
690
691 sb->s_security = kzalloc(blob_sizes.lbs_superblock, GFP_KERNEL);
692 if (sb->s_security == NULL)
693 return -ENOMEM;
694 return 0;
695}
696
697/*
698 * The default value of the LSM hook is defined in linux/lsm_hook_defs.h and
699 * can be accessed with:
700 *
701 * LSM_RET_DEFAULT(<hook_name>)
702 *
703 * The macros below define static constants for the default value of each
704 * LSM hook.
705 */
706#define LSM_RET_DEFAULT(NAME) (NAME##_default)
707#define DECLARE_LSM_RET_DEFAULT_void(DEFAULT, NAME)
708#define DECLARE_LSM_RET_DEFAULT_int(DEFAULT, NAME) \
709 static const int __maybe_unused LSM_RET_DEFAULT(NAME) = (DEFAULT);
710#define LSM_HOOK(RET, DEFAULT, NAME, ...) \
711 DECLARE_LSM_RET_DEFAULT_##RET(DEFAULT, NAME)
712
713#include <linux/lsm_hook_defs.h>
714#undef LSM_HOOK
715
716/*
717 * Hook list operation macros.
718 *
719 * call_void_hook:
720 * This is a hook that does not return a value.
721 *
722 * call_int_hook:
723 * This is a hook that returns a value.
724 */
725
726#define call_void_hook(FUNC, ...) \
727 do { \
728 struct security_hook_list *P; \
729 \
730 hlist_for_each_entry(P, &security_hook_heads.FUNC, list) \
731 P->hook.FUNC(__VA_ARGS__); \
732 } while (0)
733
734#define call_int_hook(FUNC, IRC, ...) ({ \
735 int RC = IRC; \
736 do { \
737 struct security_hook_list *P; \
738 \
739 hlist_for_each_entry(P, &security_hook_heads.FUNC, list) { \
740 RC = P->hook.FUNC(__VA_ARGS__); \
741 if (RC != 0) \
742 break; \
743 } \
744 } while (0); \
745 RC; \
746})
747
748/* Security operations */
749
750int security_binder_set_context_mgr(const struct cred *mgr)
751{
752 return call_int_hook(binder_set_context_mgr, 0, mgr);
753}
754
755int security_binder_transaction(const struct cred *from,
756 const struct cred *to)
757{
758 return call_int_hook(binder_transaction, 0, from, to);
759}
760
761int security_binder_transfer_binder(const struct cred *from,
762 const struct cred *to)
763{
764 return call_int_hook(binder_transfer_binder, 0, from, to);
765}
766
767int security_binder_transfer_file(const struct cred *from,
768 const struct cred *to, struct file *file)
769{
770 return call_int_hook(binder_transfer_file, 0, from, to, file);
771}
772
773int security_ptrace_access_check(struct task_struct *child, unsigned int mode)
774{
775 return call_int_hook(ptrace_access_check, 0, child, mode);
776}
777
778int security_ptrace_traceme(struct task_struct *parent)
779{
780 return call_int_hook(ptrace_traceme, 0, parent);
781}
782
783int security_capget(struct task_struct *target,
784 kernel_cap_t *effective,
785 kernel_cap_t *inheritable,
786 kernel_cap_t *permitted)
787{
788 return call_int_hook(capget, 0, target,
789 effective, inheritable, permitted);
790}
791
792int security_capset(struct cred *new, const struct cred *old,
793 const kernel_cap_t *effective,
794 const kernel_cap_t *inheritable,
795 const kernel_cap_t *permitted)
796{
797 return call_int_hook(capset, 0, new, old,
798 effective, inheritable, permitted);
799}
800
801int security_capable(const struct cred *cred,
802 struct user_namespace *ns,
803 int cap,
804 unsigned int opts)
805{
806 return call_int_hook(capable, 0, cred, ns, cap, opts);
807}
808
809int security_quotactl(int cmds, int type, int id, struct super_block *sb)
810{
811 return call_int_hook(quotactl, 0, cmds, type, id, sb);
812}
813
814int security_quota_on(struct dentry *dentry)
815{
816 return call_int_hook(quota_on, 0, dentry);
817}
818
819int security_syslog(int type)
820{
821 return call_int_hook(syslog, 0, type);
822}
823
824int security_settime64(const struct timespec64 *ts, const struct timezone *tz)
825{
826 return call_int_hook(settime, 0, ts, tz);
827}
828
829int security_vm_enough_memory_mm(struct mm_struct *mm, long pages)
830{
831 struct security_hook_list *hp;
832 int cap_sys_admin = 1;
833 int rc;
834
835 /*
836 * The module will respond with a positive value if
837 * it thinks the __vm_enough_memory() call should be
838 * made with the cap_sys_admin set. If all of the modules
839 * agree that it should be set it will. If any module
840 * thinks it should not be set it won't.
841 */
842 hlist_for_each_entry(hp, &security_hook_heads.vm_enough_memory, list) {
843 rc = hp->hook.vm_enough_memory(mm, pages);
844 if (rc <= 0) {
845 cap_sys_admin = 0;
846 break;
847 }
848 }
849 return __vm_enough_memory(mm, pages, cap_sys_admin);
850}
851
852int security_bprm_creds_for_exec(struct linux_binprm *bprm)
853{
854 return call_int_hook(bprm_creds_for_exec, 0, bprm);
855}
856
857int security_bprm_creds_from_file(struct linux_binprm *bprm, struct file *file)
858{
859 return call_int_hook(bprm_creds_from_file, 0, bprm, file);
860}
861
862int security_bprm_check(struct linux_binprm *bprm)
863{
864 int ret;
865
866 ret = call_int_hook(bprm_check_security, 0, bprm);
867 if (ret)
868 return ret;
869 return ima_bprm_check(bprm);
870}
871
872void security_bprm_committing_creds(struct linux_binprm *bprm)
873{
874 call_void_hook(bprm_committing_creds, bprm);
875}
876
877void security_bprm_committed_creds(struct linux_binprm *bprm)
878{
879 call_void_hook(bprm_committed_creds, bprm);
880}
881
882int security_fs_context_dup(struct fs_context *fc, struct fs_context *src_fc)
883{
884 return call_int_hook(fs_context_dup, 0, fc, src_fc);
885}
886
887int security_fs_context_parse_param(struct fs_context *fc,
888 struct fs_parameter *param)
889{
890 struct security_hook_list *hp;
891 int trc;
892 int rc = -ENOPARAM;
893
894 hlist_for_each_entry(hp, &security_hook_heads.fs_context_parse_param,
895 list) {
896 trc = hp->hook.fs_context_parse_param(fc, param);
897 if (trc == 0)
898 rc = 0;
899 else if (trc != -ENOPARAM)
900 return trc;
901 }
902 return rc;
903}
904
905int security_sb_alloc(struct super_block *sb)
906{
907 int rc = lsm_superblock_alloc(sb);
908
909 if (unlikely(rc))
910 return rc;
911 rc = call_int_hook(sb_alloc_security, 0, sb);
912 if (unlikely(rc))
913 security_sb_free(sb);
914 return rc;
915}
916
917void security_sb_delete(struct super_block *sb)
918{
919 call_void_hook(sb_delete, sb);
920}
921
922void security_sb_free(struct super_block *sb)
923{
924 call_void_hook(sb_free_security, sb);
925 kfree(sb->s_security);
926 sb->s_security = NULL;
927}
928
929void security_free_mnt_opts(void **mnt_opts)
930{
931 if (!*mnt_opts)
932 return;
933 call_void_hook(sb_free_mnt_opts, *mnt_opts);
934 *mnt_opts = NULL;
935}
936EXPORT_SYMBOL(security_free_mnt_opts);
937
938int security_sb_eat_lsm_opts(char *options, void **mnt_opts)
939{
940 return call_int_hook(sb_eat_lsm_opts, 0, options, mnt_opts);
941}
942EXPORT_SYMBOL(security_sb_eat_lsm_opts);
943
944int security_sb_mnt_opts_compat(struct super_block *sb,
945 void *mnt_opts)
946{
947 return call_int_hook(sb_mnt_opts_compat, 0, sb, mnt_opts);
948}
949EXPORT_SYMBOL(security_sb_mnt_opts_compat);
950
951int security_sb_remount(struct super_block *sb,
952 void *mnt_opts)
953{
954 return call_int_hook(sb_remount, 0, sb, mnt_opts);
955}
956EXPORT_SYMBOL(security_sb_remount);
957
958int security_sb_kern_mount(struct super_block *sb)
959{
960 return call_int_hook(sb_kern_mount, 0, sb);
961}
962
963int security_sb_show_options(struct seq_file *m, struct super_block *sb)
964{
965 return call_int_hook(sb_show_options, 0, m, sb);
966}
967
968int security_sb_statfs(struct dentry *dentry)
969{
970 return call_int_hook(sb_statfs, 0, dentry);
971}
972
973int security_sb_mount(const char *dev_name, const struct path *path,
974 const char *type, unsigned long flags, void *data)
975{
976 return call_int_hook(sb_mount, 0, dev_name, path, type, flags, data);
977}
978
979int security_sb_umount(struct vfsmount *mnt, int flags)
980{
981 return call_int_hook(sb_umount, 0, mnt, flags);
982}
983
984int security_sb_pivotroot(const struct path *old_path, const struct path *new_path)
985{
986 return call_int_hook(sb_pivotroot, 0, old_path, new_path);
987}
988
989int security_sb_set_mnt_opts(struct super_block *sb,
990 void *mnt_opts,
991 unsigned long kern_flags,
992 unsigned long *set_kern_flags)
993{
994 return call_int_hook(sb_set_mnt_opts,
995 mnt_opts ? -EOPNOTSUPP : 0, sb,
996 mnt_opts, kern_flags, set_kern_flags);
997}
998EXPORT_SYMBOL(security_sb_set_mnt_opts);
999
1000int security_sb_clone_mnt_opts(const struct super_block *oldsb,
1001 struct super_block *newsb,
1002 unsigned long kern_flags,
1003 unsigned long *set_kern_flags)
1004{
1005 return call_int_hook(sb_clone_mnt_opts, 0, oldsb, newsb,
1006 kern_flags, set_kern_flags);
1007}
1008EXPORT_SYMBOL(security_sb_clone_mnt_opts);
1009
1010int security_move_mount(const struct path *from_path, const struct path *to_path)
1011{
1012 return call_int_hook(move_mount, 0, from_path, to_path);
1013}
1014
1015int security_path_notify(const struct path *path, u64 mask,
1016 unsigned int obj_type)
1017{
1018 return call_int_hook(path_notify, 0, path, mask, obj_type);
1019}
1020
1021int security_inode_alloc(struct inode *inode)
1022{
1023 int rc = lsm_inode_alloc(inode);
1024
1025 if (unlikely(rc))
1026 return rc;
1027 rc = call_int_hook(inode_alloc_security, 0, inode);
1028 if (unlikely(rc))
1029 security_inode_free(inode);
1030 return rc;
1031}
1032
1033static void inode_free_by_rcu(struct rcu_head *head)
1034{
1035 /*
1036 * The rcu head is at the start of the inode blob
1037 */
1038 kmem_cache_free(lsm_inode_cache, head);
1039}
1040
1041void security_inode_free(struct inode *inode)
1042{
1043 integrity_inode_free(inode);
1044 call_void_hook(inode_free_security, inode);
1045 /*
1046 * The inode may still be referenced in a path walk and
1047 * a call to security_inode_permission() can be made
1048 * after inode_free_security() is called. Ideally, the VFS
1049 * wouldn't do this, but fixing that is a much harder
1050 * job. For now, simply free the i_security via RCU, and
1051 * leave the current inode->i_security pointer intact.
1052 * The inode will be freed after the RCU grace period too.
1053 */
1054 if (inode->i_security)
1055 call_rcu((struct rcu_head *)inode->i_security,
1056 inode_free_by_rcu);
1057}
1058
1059int security_dentry_init_security(struct dentry *dentry, int mode,
1060 const struct qstr *name,
1061 const char **xattr_name, void **ctx,
1062 u32 *ctxlen)
1063{
1064 struct security_hook_list *hp;
1065 int rc;
1066
1067 /*
1068 * Only one module will provide a security context.
1069 */
1070 hlist_for_each_entry(hp, &security_hook_heads.dentry_init_security, list) {
1071 rc = hp->hook.dentry_init_security(dentry, mode, name,
1072 xattr_name, ctx, ctxlen);
1073 if (rc != LSM_RET_DEFAULT(dentry_init_security))
1074 return rc;
1075 }
1076 return LSM_RET_DEFAULT(dentry_init_security);
1077}
1078EXPORT_SYMBOL(security_dentry_init_security);
1079
1080int security_dentry_create_files_as(struct dentry *dentry, int mode,
1081 struct qstr *name,
1082 const struct cred *old, struct cred *new)
1083{
1084 return call_int_hook(dentry_create_files_as, 0, dentry, mode,
1085 name, old, new);
1086}
1087EXPORT_SYMBOL(security_dentry_create_files_as);
1088
1089int security_inode_init_security(struct inode *inode, struct inode *dir,
1090 const struct qstr *qstr,
1091 const initxattrs initxattrs, void *fs_data)
1092{
1093 struct xattr new_xattrs[MAX_LSM_EVM_XATTR + 1];
1094 struct xattr *lsm_xattr, *evm_xattr, *xattr;
1095 int ret;
1096
1097 if (unlikely(IS_PRIVATE(inode)))
1098 return 0;
1099
1100 if (!initxattrs)
1101 return call_int_hook(inode_init_security, -EOPNOTSUPP, inode,
1102 dir, qstr, NULL, NULL, NULL);
1103 memset(new_xattrs, 0, sizeof(new_xattrs));
1104 lsm_xattr = new_xattrs;
1105 ret = call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir, qstr,
1106 &lsm_xattr->name,
1107 &lsm_xattr->value,
1108 &lsm_xattr->value_len);
1109 if (ret)
1110 goto out;
1111
1112 evm_xattr = lsm_xattr + 1;
1113 ret = evm_inode_init_security(inode, lsm_xattr, evm_xattr);
1114 if (ret)
1115 goto out;
1116 ret = initxattrs(inode, new_xattrs, fs_data);
1117out:
1118 for (xattr = new_xattrs; xattr->value != NULL; xattr++)
1119 kfree(xattr->value);
1120 return (ret == -EOPNOTSUPP) ? 0 : ret;
1121}
1122EXPORT_SYMBOL(security_inode_init_security);
1123
1124int security_inode_init_security_anon(struct inode *inode,
1125 const struct qstr *name,
1126 const struct inode *context_inode)
1127{
1128 return call_int_hook(inode_init_security_anon, 0, inode, name,
1129 context_inode);
1130}
1131
1132int security_old_inode_init_security(struct inode *inode, struct inode *dir,
1133 const struct qstr *qstr, const char **name,
1134 void **value, size_t *len)
1135{
1136 if (unlikely(IS_PRIVATE(inode)))
1137 return -EOPNOTSUPP;
1138 return call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir,
1139 qstr, name, value, len);
1140}
1141EXPORT_SYMBOL(security_old_inode_init_security);
1142
1143#ifdef CONFIG_SECURITY_PATH
1144int security_path_mknod(const struct path *dir, struct dentry *dentry, umode_t mode,
1145 unsigned int dev)
1146{
1147 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
1148 return 0;
1149 return call_int_hook(path_mknod, 0, dir, dentry, mode, dev);
1150}
1151EXPORT_SYMBOL(security_path_mknod);
1152
1153int security_path_mkdir(const struct path *dir, struct dentry *dentry, umode_t mode)
1154{
1155 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
1156 return 0;
1157 return call_int_hook(path_mkdir, 0, dir, dentry, mode);
1158}
1159EXPORT_SYMBOL(security_path_mkdir);
1160
1161int security_path_rmdir(const struct path *dir, struct dentry *dentry)
1162{
1163 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
1164 return 0;
1165 return call_int_hook(path_rmdir, 0, dir, dentry);
1166}
1167
1168int security_path_unlink(const struct path *dir, struct dentry *dentry)
1169{
1170 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
1171 return 0;
1172 return call_int_hook(path_unlink, 0, dir, dentry);
1173}
1174EXPORT_SYMBOL(security_path_unlink);
1175
1176int security_path_symlink(const struct path *dir, struct dentry *dentry,
1177 const char *old_name)
1178{
1179 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
1180 return 0;
1181 return call_int_hook(path_symlink, 0, dir, dentry, old_name);
1182}
1183
1184int security_path_link(struct dentry *old_dentry, const struct path *new_dir,
1185 struct dentry *new_dentry)
1186{
1187 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry))))
1188 return 0;
1189 return call_int_hook(path_link, 0, old_dentry, new_dir, new_dentry);
1190}
1191
1192int security_path_rename(const struct path *old_dir, struct dentry *old_dentry,
1193 const struct path *new_dir, struct dentry *new_dentry,
1194 unsigned int flags)
1195{
1196 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) ||
1197 (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry)))))
1198 return 0;
1199
1200 if (flags & RENAME_EXCHANGE) {
1201 int err = call_int_hook(path_rename, 0, new_dir, new_dentry,
1202 old_dir, old_dentry);
1203 if (err)
1204 return err;
1205 }
1206
1207 return call_int_hook(path_rename, 0, old_dir, old_dentry, new_dir,
1208 new_dentry);
1209}
1210EXPORT_SYMBOL(security_path_rename);
1211
1212int security_path_truncate(const struct path *path)
1213{
1214 if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
1215 return 0;
1216 return call_int_hook(path_truncate, 0, path);
1217}
1218
1219int security_path_chmod(const struct path *path, umode_t mode)
1220{
1221 if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
1222 return 0;
1223 return call_int_hook(path_chmod, 0, path, mode);
1224}
1225
1226int security_path_chown(const struct path *path, kuid_t uid, kgid_t gid)
1227{
1228 if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
1229 return 0;
1230 return call_int_hook(path_chown, 0, path, uid, gid);
1231}
1232
1233int security_path_chroot(const struct path *path)
1234{
1235 return call_int_hook(path_chroot, 0, path);
1236}
1237#endif
1238
1239int security_inode_create(struct inode *dir, struct dentry *dentry, umode_t mode)
1240{
1241 if (unlikely(IS_PRIVATE(dir)))
1242 return 0;
1243 return call_int_hook(inode_create, 0, dir, dentry, mode);
1244}
1245EXPORT_SYMBOL_GPL(security_inode_create);
1246
1247int security_inode_link(struct dentry *old_dentry, struct inode *dir,
1248 struct dentry *new_dentry)
1249{
1250 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry))))
1251 return 0;
1252 return call_int_hook(inode_link, 0, old_dentry, dir, new_dentry);
1253}
1254
1255int security_inode_unlink(struct inode *dir, struct dentry *dentry)
1256{
1257 if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1258 return 0;
1259 return call_int_hook(inode_unlink, 0, dir, dentry);
1260}
1261
1262int security_inode_symlink(struct inode *dir, struct dentry *dentry,
1263 const char *old_name)
1264{
1265 if (unlikely(IS_PRIVATE(dir)))
1266 return 0;
1267 return call_int_hook(inode_symlink, 0, dir, dentry, old_name);
1268}
1269
1270int security_inode_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
1271{
1272 if (unlikely(IS_PRIVATE(dir)))
1273 return 0;
1274 return call_int_hook(inode_mkdir, 0, dir, dentry, mode);
1275}
1276EXPORT_SYMBOL_GPL(security_inode_mkdir);
1277
1278int security_inode_rmdir(struct inode *dir, struct dentry *dentry)
1279{
1280 if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1281 return 0;
1282 return call_int_hook(inode_rmdir, 0, dir, dentry);
1283}
1284
1285int security_inode_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t dev)
1286{
1287 if (unlikely(IS_PRIVATE(dir)))
1288 return 0;
1289 return call_int_hook(inode_mknod, 0, dir, dentry, mode, dev);
1290}
1291
1292int security_inode_rename(struct inode *old_dir, struct dentry *old_dentry,
1293 struct inode *new_dir, struct dentry *new_dentry,
1294 unsigned int flags)
1295{
1296 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) ||
1297 (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry)))))
1298 return 0;
1299
1300 if (flags & RENAME_EXCHANGE) {
1301 int err = call_int_hook(inode_rename, 0, new_dir, new_dentry,
1302 old_dir, old_dentry);
1303 if (err)
1304 return err;
1305 }
1306
1307 return call_int_hook(inode_rename, 0, old_dir, old_dentry,
1308 new_dir, new_dentry);
1309}
1310
1311int security_inode_readlink(struct dentry *dentry)
1312{
1313 if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1314 return 0;
1315 return call_int_hook(inode_readlink, 0, dentry);
1316}
1317
1318int security_inode_follow_link(struct dentry *dentry, struct inode *inode,
1319 bool rcu)
1320{
1321 if (unlikely(IS_PRIVATE(inode)))
1322 return 0;
1323 return call_int_hook(inode_follow_link, 0, dentry, inode, rcu);
1324}
1325
1326int security_inode_permission(struct inode *inode, int mask)
1327{
1328 if (unlikely(IS_PRIVATE(inode)))
1329 return 0;
1330 return call_int_hook(inode_permission, 0, inode, mask);
1331}
1332
1333int security_inode_setattr(struct dentry *dentry, struct iattr *attr)
1334{
1335 int ret;
1336
1337 if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1338 return 0;
1339 ret = call_int_hook(inode_setattr, 0, dentry, attr);
1340 if (ret)
1341 return ret;
1342 return evm_inode_setattr(dentry, attr);
1343}
1344EXPORT_SYMBOL_GPL(security_inode_setattr);
1345
1346int security_inode_getattr(const struct path *path)
1347{
1348 if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
1349 return 0;
1350 return call_int_hook(inode_getattr, 0, path);
1351}
1352
1353int security_inode_setxattr(struct user_namespace *mnt_userns,
1354 struct dentry *dentry, const char *name,
1355 const void *value, size_t size, int flags)
1356{
1357 int ret;
1358
1359 if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1360 return 0;
1361 /*
1362 * SELinux and Smack integrate the cap call,
1363 * so assume that all LSMs supplying this call do so.
1364 */
1365 ret = call_int_hook(inode_setxattr, 1, mnt_userns, dentry, name, value,
1366 size, flags);
1367
1368 if (ret == 1)
1369 ret = cap_inode_setxattr(dentry, name, value, size, flags);
1370 if (ret)
1371 return ret;
1372 ret = ima_inode_setxattr(dentry, name, value, size);
1373 if (ret)
1374 return ret;
1375 return evm_inode_setxattr(mnt_userns, dentry, name, value, size);
1376}
1377
1378void security_inode_post_setxattr(struct dentry *dentry, const char *name,
1379 const void *value, size_t size, int flags)
1380{
1381 if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1382 return;
1383 call_void_hook(inode_post_setxattr, dentry, name, value, size, flags);
1384 evm_inode_post_setxattr(dentry, name, value, size);
1385}
1386
1387int security_inode_getxattr(struct dentry *dentry, const char *name)
1388{
1389 if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1390 return 0;
1391 return call_int_hook(inode_getxattr, 0, dentry, name);
1392}
1393
1394int security_inode_listxattr(struct dentry *dentry)
1395{
1396 if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1397 return 0;
1398 return call_int_hook(inode_listxattr, 0, dentry);
1399}
1400
1401int security_inode_removexattr(struct user_namespace *mnt_userns,
1402 struct dentry *dentry, const char *name)
1403{
1404 int ret;
1405
1406 if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1407 return 0;
1408 /*
1409 * SELinux and Smack integrate the cap call,
1410 * so assume that all LSMs supplying this call do so.
1411 */
1412 ret = call_int_hook(inode_removexattr, 1, mnt_userns, dentry, name);
1413 if (ret == 1)
1414 ret = cap_inode_removexattr(mnt_userns, dentry, name);
1415 if (ret)
1416 return ret;
1417 ret = ima_inode_removexattr(dentry, name);
1418 if (ret)
1419 return ret;
1420 return evm_inode_removexattr(mnt_userns, dentry, name);
1421}
1422
1423int security_inode_need_killpriv(struct dentry *dentry)
1424{
1425 return call_int_hook(inode_need_killpriv, 0, dentry);
1426}
1427
1428int security_inode_killpriv(struct user_namespace *mnt_userns,
1429 struct dentry *dentry)
1430{
1431 return call_int_hook(inode_killpriv, 0, mnt_userns, dentry);
1432}
1433
1434int security_inode_getsecurity(struct user_namespace *mnt_userns,
1435 struct inode *inode, const char *name,
1436 void **buffer, bool alloc)
1437{
1438 struct security_hook_list *hp;
1439 int rc;
1440
1441 if (unlikely(IS_PRIVATE(inode)))
1442 return LSM_RET_DEFAULT(inode_getsecurity);
1443 /*
1444 * Only one module will provide an attribute with a given name.
1445 */
1446 hlist_for_each_entry(hp, &security_hook_heads.inode_getsecurity, list) {
1447 rc = hp->hook.inode_getsecurity(mnt_userns, inode, name, buffer, alloc);
1448 if (rc != LSM_RET_DEFAULT(inode_getsecurity))
1449 return rc;
1450 }
1451 return LSM_RET_DEFAULT(inode_getsecurity);
1452}
1453
1454int security_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags)
1455{
1456 struct security_hook_list *hp;
1457 int rc;
1458
1459 if (unlikely(IS_PRIVATE(inode)))
1460 return LSM_RET_DEFAULT(inode_setsecurity);
1461 /*
1462 * Only one module will provide an attribute with a given name.
1463 */
1464 hlist_for_each_entry(hp, &security_hook_heads.inode_setsecurity, list) {
1465 rc = hp->hook.inode_setsecurity(inode, name, value, size,
1466 flags);
1467 if (rc != LSM_RET_DEFAULT(inode_setsecurity))
1468 return rc;
1469 }
1470 return LSM_RET_DEFAULT(inode_setsecurity);
1471}
1472
1473int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size)
1474{
1475 if (unlikely(IS_PRIVATE(inode)))
1476 return 0;
1477 return call_int_hook(inode_listsecurity, 0, inode, buffer, buffer_size);
1478}
1479EXPORT_SYMBOL(security_inode_listsecurity);
1480
1481void security_inode_getsecid(struct inode *inode, u32 *secid)
1482{
1483 call_void_hook(inode_getsecid, inode, secid);
1484}
1485
1486int security_inode_copy_up(struct dentry *src, struct cred **new)
1487{
1488 return call_int_hook(inode_copy_up, 0, src, new);
1489}
1490EXPORT_SYMBOL(security_inode_copy_up);
1491
1492int security_inode_copy_up_xattr(const char *name)
1493{
1494 struct security_hook_list *hp;
1495 int rc;
1496
1497 /*
1498 * The implementation can return 0 (accept the xattr), 1 (discard the
1499 * xattr), -EOPNOTSUPP if it does not know anything about the xattr or
1500 * any other error code incase of an error.
1501 */
1502 hlist_for_each_entry(hp,
1503 &security_hook_heads.inode_copy_up_xattr, list) {
1504 rc = hp->hook.inode_copy_up_xattr(name);
1505 if (rc != LSM_RET_DEFAULT(inode_copy_up_xattr))
1506 return rc;
1507 }
1508
1509 return LSM_RET_DEFAULT(inode_copy_up_xattr);
1510}
1511EXPORT_SYMBOL(security_inode_copy_up_xattr);
1512
1513int security_kernfs_init_security(struct kernfs_node *kn_dir,
1514 struct kernfs_node *kn)
1515{
1516 return call_int_hook(kernfs_init_security, 0, kn_dir, kn);
1517}
1518
1519int security_file_permission(struct file *file, int mask)
1520{
1521 int ret;
1522
1523 ret = call_int_hook(file_permission, 0, file, mask);
1524 if (ret)
1525 return ret;
1526
1527 return fsnotify_perm(file, mask);
1528}
1529
1530int security_file_alloc(struct file *file)
1531{
1532 int rc = lsm_file_alloc(file);
1533
1534 if (rc)
1535 return rc;
1536 rc = call_int_hook(file_alloc_security, 0, file);
1537 if (unlikely(rc))
1538 security_file_free(file);
1539 return rc;
1540}
1541
1542void security_file_free(struct file *file)
1543{
1544 void *blob;
1545
1546 call_void_hook(file_free_security, file);
1547
1548 blob = file->f_security;
1549 if (blob) {
1550 file->f_security = NULL;
1551 kmem_cache_free(lsm_file_cache, blob);
1552 }
1553}
1554
1555int security_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1556{
1557 return call_int_hook(file_ioctl, 0, file, cmd, arg);
1558}
1559EXPORT_SYMBOL_GPL(security_file_ioctl);
1560
1561static inline unsigned long mmap_prot(struct file *file, unsigned long prot)
1562{
1563 /*
1564 * Does we have PROT_READ and does the application expect
1565 * it to imply PROT_EXEC? If not, nothing to talk about...
1566 */
1567 if ((prot & (PROT_READ | PROT_EXEC)) != PROT_READ)
1568 return prot;
1569 if (!(current->personality & READ_IMPLIES_EXEC))
1570 return prot;
1571 /*
1572 * if that's an anonymous mapping, let it.
1573 */
1574 if (!file)
1575 return prot | PROT_EXEC;
1576 /*
1577 * ditto if it's not on noexec mount, except that on !MMU we need
1578 * NOMMU_MAP_EXEC (== VM_MAYEXEC) in this case
1579 */
1580 if (!path_noexec(&file->f_path)) {
1581#ifndef CONFIG_MMU
1582 if (file->f_op->mmap_capabilities) {
1583 unsigned caps = file->f_op->mmap_capabilities(file);
1584 if (!(caps & NOMMU_MAP_EXEC))
1585 return prot;
1586 }
1587#endif
1588 return prot | PROT_EXEC;
1589 }
1590 /* anything on noexec mount won't get PROT_EXEC */
1591 return prot;
1592}
1593
1594int security_mmap_file(struct file *file, unsigned long prot,
1595 unsigned long flags)
1596{
1597 int ret;
1598 ret = call_int_hook(mmap_file, 0, file, prot,
1599 mmap_prot(file, prot), flags);
1600 if (ret)
1601 return ret;
1602 return ima_file_mmap(file, prot);
1603}
1604
1605int security_mmap_addr(unsigned long addr)
1606{
1607 return call_int_hook(mmap_addr, 0, addr);
1608}
1609
1610int security_file_mprotect(struct vm_area_struct *vma, unsigned long reqprot,
1611 unsigned long prot)
1612{
1613 int ret;
1614
1615 ret = call_int_hook(file_mprotect, 0, vma, reqprot, prot);
1616 if (ret)
1617 return ret;
1618 return ima_file_mprotect(vma, prot);
1619}
1620
1621int security_file_lock(struct file *file, unsigned int cmd)
1622{
1623 return call_int_hook(file_lock, 0, file, cmd);
1624}
1625
1626int security_file_fcntl(struct file *file, unsigned int cmd, unsigned long arg)
1627{
1628 return call_int_hook(file_fcntl, 0, file, cmd, arg);
1629}
1630
1631void security_file_set_fowner(struct file *file)
1632{
1633 call_void_hook(file_set_fowner, file);
1634}
1635
1636int security_file_send_sigiotask(struct task_struct *tsk,
1637 struct fown_struct *fown, int sig)
1638{
1639 return call_int_hook(file_send_sigiotask, 0, tsk, fown, sig);
1640}
1641
1642int security_file_receive(struct file *file)
1643{
1644 return call_int_hook(file_receive, 0, file);
1645}
1646
1647int security_file_open(struct file *file)
1648{
1649 int ret;
1650
1651 ret = call_int_hook(file_open, 0, file);
1652 if (ret)
1653 return ret;
1654
1655 return fsnotify_perm(file, MAY_OPEN);
1656}
1657
1658int security_task_alloc(struct task_struct *task, unsigned long clone_flags)
1659{
1660 int rc = lsm_task_alloc(task);
1661
1662 if (rc)
1663 return rc;
1664 rc = call_int_hook(task_alloc, 0, task, clone_flags);
1665 if (unlikely(rc))
1666 security_task_free(task);
1667 return rc;
1668}
1669
1670void security_task_free(struct task_struct *task)
1671{
1672 call_void_hook(task_free, task);
1673
1674 kfree(task->security);
1675 task->security = NULL;
1676}
1677
1678int security_cred_alloc_blank(struct cred *cred, gfp_t gfp)
1679{
1680 int rc = lsm_cred_alloc(cred, gfp);
1681
1682 if (rc)
1683 return rc;
1684
1685 rc = call_int_hook(cred_alloc_blank, 0, cred, gfp);
1686 if (unlikely(rc))
1687 security_cred_free(cred);
1688 return rc;
1689}
1690
1691void security_cred_free(struct cred *cred)
1692{
1693 /*
1694 * There is a failure case in prepare_creds() that
1695 * may result in a call here with ->security being NULL.
1696 */
1697 if (unlikely(cred->security == NULL))
1698 return;
1699
1700 call_void_hook(cred_free, cred);
1701
1702 kfree(cred->security);
1703 cred->security = NULL;
1704}
1705
1706int security_prepare_creds(struct cred *new, const struct cred *old, gfp_t gfp)
1707{
1708 int rc = lsm_cred_alloc(new, gfp);
1709
1710 if (rc)
1711 return rc;
1712
1713 rc = call_int_hook(cred_prepare, 0, new, old, gfp);
1714 if (unlikely(rc))
1715 security_cred_free(new);
1716 return rc;
1717}
1718
1719void security_transfer_creds(struct cred *new, const struct cred *old)
1720{
1721 call_void_hook(cred_transfer, new, old);
1722}
1723
1724void security_cred_getsecid(const struct cred *c, u32 *secid)
1725{
1726 *secid = 0;
1727 call_void_hook(cred_getsecid, c, secid);
1728}
1729EXPORT_SYMBOL(security_cred_getsecid);
1730
1731int security_kernel_act_as(struct cred *new, u32 secid)
1732{
1733 return call_int_hook(kernel_act_as, 0, new, secid);
1734}
1735
1736int security_kernel_create_files_as(struct cred *new, struct inode *inode)
1737{
1738 return call_int_hook(kernel_create_files_as, 0, new, inode);
1739}
1740
1741int security_kernel_module_request(char *kmod_name)
1742{
1743 int ret;
1744
1745 ret = call_int_hook(kernel_module_request, 0, kmod_name);
1746 if (ret)
1747 return ret;
1748 return integrity_kernel_module_request(kmod_name);
1749}
1750
1751int security_kernel_read_file(struct file *file, enum kernel_read_file_id id,
1752 bool contents)
1753{
1754 int ret;
1755
1756 ret = call_int_hook(kernel_read_file, 0, file, id, contents);
1757 if (ret)
1758 return ret;
1759 return ima_read_file(file, id, contents);
1760}
1761EXPORT_SYMBOL_GPL(security_kernel_read_file);
1762
1763int security_kernel_post_read_file(struct file *file, char *buf, loff_t size,
1764 enum kernel_read_file_id id)
1765{
1766 int ret;
1767
1768 ret = call_int_hook(kernel_post_read_file, 0, file, buf, size, id);
1769 if (ret)
1770 return ret;
1771 return ima_post_read_file(file, buf, size, id);
1772}
1773EXPORT_SYMBOL_GPL(security_kernel_post_read_file);
1774
1775int security_kernel_load_data(enum kernel_load_data_id id, bool contents)
1776{
1777 int ret;
1778
1779 ret = call_int_hook(kernel_load_data, 0, id, contents);
1780 if (ret)
1781 return ret;
1782 return ima_load_data(id, contents);
1783}
1784EXPORT_SYMBOL_GPL(security_kernel_load_data);
1785
1786int security_kernel_post_load_data(char *buf, loff_t size,
1787 enum kernel_load_data_id id,
1788 char *description)
1789{
1790 int ret;
1791
1792 ret = call_int_hook(kernel_post_load_data, 0, buf, size, id,
1793 description);
1794 if (ret)
1795 return ret;
1796 return ima_post_load_data(buf, size, id, description);
1797}
1798EXPORT_SYMBOL_GPL(security_kernel_post_load_data);
1799
1800int security_task_fix_setuid(struct cred *new, const struct cred *old,
1801 int flags)
1802{
1803 return call_int_hook(task_fix_setuid, 0, new, old, flags);
1804}
1805
1806int security_task_fix_setgid(struct cred *new, const struct cred *old,
1807 int flags)
1808{
1809 return call_int_hook(task_fix_setgid, 0, new, old, flags);
1810}
1811
1812int security_task_setpgid(struct task_struct *p, pid_t pgid)
1813{
1814 return call_int_hook(task_setpgid, 0, p, pgid);
1815}
1816
1817int security_task_getpgid(struct task_struct *p)
1818{
1819 return call_int_hook(task_getpgid, 0, p);
1820}
1821
1822int security_task_getsid(struct task_struct *p)
1823{
1824 return call_int_hook(task_getsid, 0, p);
1825}
1826
1827void security_current_getsecid_subj(u32 *secid)
1828{
1829 *secid = 0;
1830 call_void_hook(current_getsecid_subj, secid);
1831}
1832EXPORT_SYMBOL(security_current_getsecid_subj);
1833
1834void security_task_getsecid_obj(struct task_struct *p, u32 *secid)
1835{
1836 *secid = 0;
1837 call_void_hook(task_getsecid_obj, p, secid);
1838}
1839EXPORT_SYMBOL(security_task_getsecid_obj);
1840
1841int security_task_setnice(struct task_struct *p, int nice)
1842{
1843 return call_int_hook(task_setnice, 0, p, nice);
1844}
1845
1846int security_task_setioprio(struct task_struct *p, int ioprio)
1847{
1848 return call_int_hook(task_setioprio, 0, p, ioprio);
1849}
1850
1851int security_task_getioprio(struct task_struct *p)
1852{
1853 return call_int_hook(task_getioprio, 0, p);
1854}
1855
1856int security_task_prlimit(const struct cred *cred, const struct cred *tcred,
1857 unsigned int flags)
1858{
1859 return call_int_hook(task_prlimit, 0, cred, tcred, flags);
1860}
1861
1862int security_task_setrlimit(struct task_struct *p, unsigned int resource,
1863 struct rlimit *new_rlim)
1864{
1865 return call_int_hook(task_setrlimit, 0, p, resource, new_rlim);
1866}
1867
1868int security_task_setscheduler(struct task_struct *p)
1869{
1870 return call_int_hook(task_setscheduler, 0, p);
1871}
1872
1873int security_task_getscheduler(struct task_struct *p)
1874{
1875 return call_int_hook(task_getscheduler, 0, p);
1876}
1877
1878int security_task_movememory(struct task_struct *p)
1879{
1880 return call_int_hook(task_movememory, 0, p);
1881}
1882
1883int security_task_kill(struct task_struct *p, struct kernel_siginfo *info,
1884 int sig, const struct cred *cred)
1885{
1886 return call_int_hook(task_kill, 0, p, info, sig, cred);
1887}
1888
1889int security_task_prctl(int option, unsigned long arg2, unsigned long arg3,
1890 unsigned long arg4, unsigned long arg5)
1891{
1892 int thisrc;
1893 int rc = LSM_RET_DEFAULT(task_prctl);
1894 struct security_hook_list *hp;
1895
1896 hlist_for_each_entry(hp, &security_hook_heads.task_prctl, list) {
1897 thisrc = hp->hook.task_prctl(option, arg2, arg3, arg4, arg5);
1898 if (thisrc != LSM_RET_DEFAULT(task_prctl)) {
1899 rc = thisrc;
1900 if (thisrc != 0)
1901 break;
1902 }
1903 }
1904 return rc;
1905}
1906
1907void security_task_to_inode(struct task_struct *p, struct inode *inode)
1908{
1909 call_void_hook(task_to_inode, p, inode);
1910}
1911
1912int security_ipc_permission(struct kern_ipc_perm *ipcp, short flag)
1913{
1914 return call_int_hook(ipc_permission, 0, ipcp, flag);
1915}
1916
1917void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid)
1918{
1919 *secid = 0;
1920 call_void_hook(ipc_getsecid, ipcp, secid);
1921}
1922
1923int security_msg_msg_alloc(struct msg_msg *msg)
1924{
1925 int rc = lsm_msg_msg_alloc(msg);
1926
1927 if (unlikely(rc))
1928 return rc;
1929 rc = call_int_hook(msg_msg_alloc_security, 0, msg);
1930 if (unlikely(rc))
1931 security_msg_msg_free(msg);
1932 return rc;
1933}
1934
1935void security_msg_msg_free(struct msg_msg *msg)
1936{
1937 call_void_hook(msg_msg_free_security, msg);
1938 kfree(msg->security);
1939 msg->security = NULL;
1940}
1941
1942int security_msg_queue_alloc(struct kern_ipc_perm *msq)
1943{
1944 int rc = lsm_ipc_alloc(msq);
1945
1946 if (unlikely(rc))
1947 return rc;
1948 rc = call_int_hook(msg_queue_alloc_security, 0, msq);
1949 if (unlikely(rc))
1950 security_msg_queue_free(msq);
1951 return rc;
1952}
1953
1954void security_msg_queue_free(struct kern_ipc_perm *msq)
1955{
1956 call_void_hook(msg_queue_free_security, msq);
1957 kfree(msq->security);
1958 msq->security = NULL;
1959}
1960
1961int security_msg_queue_associate(struct kern_ipc_perm *msq, int msqflg)
1962{
1963 return call_int_hook(msg_queue_associate, 0, msq, msqflg);
1964}
1965
1966int security_msg_queue_msgctl(struct kern_ipc_perm *msq, int cmd)
1967{
1968 return call_int_hook(msg_queue_msgctl, 0, msq, cmd);
1969}
1970
1971int security_msg_queue_msgsnd(struct kern_ipc_perm *msq,
1972 struct msg_msg *msg, int msqflg)
1973{
1974 return call_int_hook(msg_queue_msgsnd, 0, msq, msg, msqflg);
1975}
1976
1977int security_msg_queue_msgrcv(struct kern_ipc_perm *msq, struct msg_msg *msg,
1978 struct task_struct *target, long type, int mode)
1979{
1980 return call_int_hook(msg_queue_msgrcv, 0, msq, msg, target, type, mode);
1981}
1982
1983int security_shm_alloc(struct kern_ipc_perm *shp)
1984{
1985 int rc = lsm_ipc_alloc(shp);
1986
1987 if (unlikely(rc))
1988 return rc;
1989 rc = call_int_hook(shm_alloc_security, 0, shp);
1990 if (unlikely(rc))
1991 security_shm_free(shp);
1992 return rc;
1993}
1994
1995void security_shm_free(struct kern_ipc_perm *shp)
1996{
1997 call_void_hook(shm_free_security, shp);
1998 kfree(shp->security);
1999 shp->security = NULL;
2000}
2001
2002int security_shm_associate(struct kern_ipc_perm *shp, int shmflg)
2003{
2004 return call_int_hook(shm_associate, 0, shp, shmflg);
2005}
2006
2007int security_shm_shmctl(struct kern_ipc_perm *shp, int cmd)
2008{
2009 return call_int_hook(shm_shmctl, 0, shp, cmd);
2010}
2011
2012int security_shm_shmat(struct kern_ipc_perm *shp, char __user *shmaddr, int shmflg)
2013{
2014 return call_int_hook(shm_shmat, 0, shp, shmaddr, shmflg);
2015}
2016
2017int security_sem_alloc(struct kern_ipc_perm *sma)
2018{
2019 int rc = lsm_ipc_alloc(sma);
2020
2021 if (unlikely(rc))
2022 return rc;
2023 rc = call_int_hook(sem_alloc_security, 0, sma);
2024 if (unlikely(rc))
2025 security_sem_free(sma);
2026 return rc;
2027}
2028
2029void security_sem_free(struct kern_ipc_perm *sma)
2030{
2031 call_void_hook(sem_free_security, sma);
2032 kfree(sma->security);
2033 sma->security = NULL;
2034}
2035
2036int security_sem_associate(struct kern_ipc_perm *sma, int semflg)
2037{
2038 return call_int_hook(sem_associate, 0, sma, semflg);
2039}
2040
2041int security_sem_semctl(struct kern_ipc_perm *sma, int cmd)
2042{
2043 return call_int_hook(sem_semctl, 0, sma, cmd);
2044}
2045
2046int security_sem_semop(struct kern_ipc_perm *sma, struct sembuf *sops,
2047 unsigned nsops, int alter)
2048{
2049 return call_int_hook(sem_semop, 0, sma, sops, nsops, alter);
2050}
2051
2052void security_d_instantiate(struct dentry *dentry, struct inode *inode)
2053{
2054 if (unlikely(inode && IS_PRIVATE(inode)))
2055 return;
2056 call_void_hook(d_instantiate, dentry, inode);
2057}
2058EXPORT_SYMBOL(security_d_instantiate);
2059
2060int security_getprocattr(struct task_struct *p, const char *lsm, char *name,
2061 char **value)
2062{
2063 struct security_hook_list *hp;
2064
2065 hlist_for_each_entry(hp, &security_hook_heads.getprocattr, list) {
2066 if (lsm != NULL && strcmp(lsm, hp->lsm))
2067 continue;
2068 return hp->hook.getprocattr(p, name, value);
2069 }
2070 return LSM_RET_DEFAULT(getprocattr);
2071}
2072
2073int security_setprocattr(const char *lsm, const char *name, void *value,
2074 size_t size)
2075{
2076 struct security_hook_list *hp;
2077
2078 hlist_for_each_entry(hp, &security_hook_heads.setprocattr, list) {
2079 if (lsm != NULL && strcmp(lsm, hp->lsm))
2080 continue;
2081 return hp->hook.setprocattr(name, value, size);
2082 }
2083 return LSM_RET_DEFAULT(setprocattr);
2084}
2085
2086int security_netlink_send(struct sock *sk, struct sk_buff *skb)
2087{
2088 return call_int_hook(netlink_send, 0, sk, skb);
2089}
2090
2091int security_ismaclabel(const char *name)
2092{
2093 return call_int_hook(ismaclabel, 0, name);
2094}
2095EXPORT_SYMBOL(security_ismaclabel);
2096
2097int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
2098{
2099 struct security_hook_list *hp;
2100 int rc;
2101
2102 /*
2103 * Currently, only one LSM can implement secid_to_secctx (i.e this
2104 * LSM hook is not "stackable").
2105 */
2106 hlist_for_each_entry(hp, &security_hook_heads.secid_to_secctx, list) {
2107 rc = hp->hook.secid_to_secctx(secid, secdata, seclen);
2108 if (rc != LSM_RET_DEFAULT(secid_to_secctx))
2109 return rc;
2110 }
2111
2112 return LSM_RET_DEFAULT(secid_to_secctx);
2113}
2114EXPORT_SYMBOL(security_secid_to_secctx);
2115
2116int security_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid)
2117{
2118 *secid = 0;
2119 return call_int_hook(secctx_to_secid, 0, secdata, seclen, secid);
2120}
2121EXPORT_SYMBOL(security_secctx_to_secid);
2122
2123void security_release_secctx(char *secdata, u32 seclen)
2124{
2125 call_void_hook(release_secctx, secdata, seclen);
2126}
2127EXPORT_SYMBOL(security_release_secctx);
2128
2129void security_inode_invalidate_secctx(struct inode *inode)
2130{
2131 call_void_hook(inode_invalidate_secctx, inode);
2132}
2133EXPORT_SYMBOL(security_inode_invalidate_secctx);
2134
2135int security_inode_notifysecctx(struct inode *inode, void *ctx, u32 ctxlen)
2136{
2137 return call_int_hook(inode_notifysecctx, 0, inode, ctx, ctxlen);
2138}
2139EXPORT_SYMBOL(security_inode_notifysecctx);
2140
2141int security_inode_setsecctx(struct dentry *dentry, void *ctx, u32 ctxlen)
2142{
2143 return call_int_hook(inode_setsecctx, 0, dentry, ctx, ctxlen);
2144}
2145EXPORT_SYMBOL(security_inode_setsecctx);
2146
2147int security_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen)
2148{
2149 return call_int_hook(inode_getsecctx, -EOPNOTSUPP, inode, ctx, ctxlen);
2150}
2151EXPORT_SYMBOL(security_inode_getsecctx);
2152
2153#ifdef CONFIG_WATCH_QUEUE
2154int security_post_notification(const struct cred *w_cred,
2155 const struct cred *cred,
2156 struct watch_notification *n)
2157{
2158 return call_int_hook(post_notification, 0, w_cred, cred, n);
2159}
2160#endif /* CONFIG_WATCH_QUEUE */
2161
2162#ifdef CONFIG_KEY_NOTIFICATIONS
2163int security_watch_key(struct key *key)
2164{
2165 return call_int_hook(watch_key, 0, key);
2166}
2167#endif
2168
2169#ifdef CONFIG_SECURITY_NETWORK
2170
2171int security_unix_stream_connect(struct sock *sock, struct sock *other, struct sock *newsk)
2172{
2173 return call_int_hook(unix_stream_connect, 0, sock, other, newsk);
2174}
2175EXPORT_SYMBOL(security_unix_stream_connect);
2176
2177int security_unix_may_send(struct socket *sock, struct socket *other)
2178{
2179 return call_int_hook(unix_may_send, 0, sock, other);
2180}
2181EXPORT_SYMBOL(security_unix_may_send);
2182
2183int security_socket_create(int family, int type, int protocol, int kern)
2184{
2185 return call_int_hook(socket_create, 0, family, type, protocol, kern);
2186}
2187
2188int security_socket_post_create(struct socket *sock, int family,
2189 int type, int protocol, int kern)
2190{
2191 return call_int_hook(socket_post_create, 0, sock, family, type,
2192 protocol, kern);
2193}
2194
2195int security_socket_socketpair(struct socket *socka, struct socket *sockb)
2196{
2197 return call_int_hook(socket_socketpair, 0, socka, sockb);
2198}
2199EXPORT_SYMBOL(security_socket_socketpair);
2200
2201int security_socket_bind(struct socket *sock, struct sockaddr *address, int addrlen)
2202{
2203 return call_int_hook(socket_bind, 0, sock, address, addrlen);
2204}
2205
2206int security_socket_connect(struct socket *sock, struct sockaddr *address, int addrlen)
2207{
2208 return call_int_hook(socket_connect, 0, sock, address, addrlen);
2209}
2210
2211int security_socket_listen(struct socket *sock, int backlog)
2212{
2213 return call_int_hook(socket_listen, 0, sock, backlog);
2214}
2215
2216int security_socket_accept(struct socket *sock, struct socket *newsock)
2217{
2218 return call_int_hook(socket_accept, 0, sock, newsock);
2219}
2220
2221int security_socket_sendmsg(struct socket *sock, struct msghdr *msg, int size)
2222{
2223 return call_int_hook(socket_sendmsg, 0, sock, msg, size);
2224}
2225
2226int security_socket_recvmsg(struct socket *sock, struct msghdr *msg,
2227 int size, int flags)
2228{
2229 return call_int_hook(socket_recvmsg, 0, sock, msg, size, flags);
2230}
2231
2232int security_socket_getsockname(struct socket *sock)
2233{
2234 return call_int_hook(socket_getsockname, 0, sock);
2235}
2236
2237int security_socket_getpeername(struct socket *sock)
2238{
2239 return call_int_hook(socket_getpeername, 0, sock);
2240}
2241
2242int security_socket_getsockopt(struct socket *sock, int level, int optname)
2243{
2244 return call_int_hook(socket_getsockopt, 0, sock, level, optname);
2245}
2246
2247int security_socket_setsockopt(struct socket *sock, int level, int optname)
2248{
2249 return call_int_hook(socket_setsockopt, 0, sock, level, optname);
2250}
2251
2252int security_socket_shutdown(struct socket *sock, int how)
2253{
2254 return call_int_hook(socket_shutdown, 0, sock, how);
2255}
2256
2257int security_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
2258{
2259 return call_int_hook(socket_sock_rcv_skb, 0, sk, skb);
2260}
2261EXPORT_SYMBOL(security_sock_rcv_skb);
2262
2263int security_socket_getpeersec_stream(struct socket *sock, char __user *optval,
2264 int __user *optlen, unsigned len)
2265{
2266 return call_int_hook(socket_getpeersec_stream, -ENOPROTOOPT, sock,
2267 optval, optlen, len);
2268}
2269
2270int security_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb, u32 *secid)
2271{
2272 return call_int_hook(socket_getpeersec_dgram, -ENOPROTOOPT, sock,
2273 skb, secid);
2274}
2275EXPORT_SYMBOL(security_socket_getpeersec_dgram);
2276
2277int security_sk_alloc(struct sock *sk, int family, gfp_t priority)
2278{
2279 return call_int_hook(sk_alloc_security, 0, sk, family, priority);
2280}
2281
2282void security_sk_free(struct sock *sk)
2283{
2284 call_void_hook(sk_free_security, sk);
2285}
2286
2287void security_sk_clone(const struct sock *sk, struct sock *newsk)
2288{
2289 call_void_hook(sk_clone_security, sk, newsk);
2290}
2291EXPORT_SYMBOL(security_sk_clone);
2292
2293void security_sk_classify_flow(struct sock *sk, struct flowi_common *flic)
2294{
2295 call_void_hook(sk_getsecid, sk, &flic->flowic_secid);
2296}
2297EXPORT_SYMBOL(security_sk_classify_flow);
2298
2299void security_req_classify_flow(const struct request_sock *req,
2300 struct flowi_common *flic)
2301{
2302 call_void_hook(req_classify_flow, req, flic);
2303}
2304EXPORT_SYMBOL(security_req_classify_flow);
2305
2306void security_sock_graft(struct sock *sk, struct socket *parent)
2307{
2308 call_void_hook(sock_graft, sk, parent);
2309}
2310EXPORT_SYMBOL(security_sock_graft);
2311
2312int security_inet_conn_request(const struct sock *sk,
2313 struct sk_buff *skb, struct request_sock *req)
2314{
2315 return call_int_hook(inet_conn_request, 0, sk, skb, req);
2316}
2317EXPORT_SYMBOL(security_inet_conn_request);
2318
2319void security_inet_csk_clone(struct sock *newsk,
2320 const struct request_sock *req)
2321{
2322 call_void_hook(inet_csk_clone, newsk, req);
2323}
2324
2325void security_inet_conn_established(struct sock *sk,
2326 struct sk_buff *skb)
2327{
2328 call_void_hook(inet_conn_established, sk, skb);
2329}
2330EXPORT_SYMBOL(security_inet_conn_established);
2331
2332int security_secmark_relabel_packet(u32 secid)
2333{
2334 return call_int_hook(secmark_relabel_packet, 0, secid);
2335}
2336EXPORT_SYMBOL(security_secmark_relabel_packet);
2337
2338void security_secmark_refcount_inc(void)
2339{
2340 call_void_hook(secmark_refcount_inc);
2341}
2342EXPORT_SYMBOL(security_secmark_refcount_inc);
2343
2344void security_secmark_refcount_dec(void)
2345{
2346 call_void_hook(secmark_refcount_dec);
2347}
2348EXPORT_SYMBOL(security_secmark_refcount_dec);
2349
2350int security_tun_dev_alloc_security(void **security)
2351{
2352 return call_int_hook(tun_dev_alloc_security, 0, security);
2353}
2354EXPORT_SYMBOL(security_tun_dev_alloc_security);
2355
2356void security_tun_dev_free_security(void *security)
2357{
2358 call_void_hook(tun_dev_free_security, security);
2359}
2360EXPORT_SYMBOL(security_tun_dev_free_security);
2361
2362int security_tun_dev_create(void)
2363{
2364 return call_int_hook(tun_dev_create, 0);
2365}
2366EXPORT_SYMBOL(security_tun_dev_create);
2367
2368int security_tun_dev_attach_queue(void *security)
2369{
2370 return call_int_hook(tun_dev_attach_queue, 0, security);
2371}
2372EXPORT_SYMBOL(security_tun_dev_attach_queue);
2373
2374int security_tun_dev_attach(struct sock *sk, void *security)
2375{
2376 return call_int_hook(tun_dev_attach, 0, sk, security);
2377}
2378EXPORT_SYMBOL(security_tun_dev_attach);
2379
2380int security_tun_dev_open(void *security)
2381{
2382 return call_int_hook(tun_dev_open, 0, security);
2383}
2384EXPORT_SYMBOL(security_tun_dev_open);
2385
2386int security_sctp_assoc_request(struct sctp_association *asoc, struct sk_buff *skb)
2387{
2388 return call_int_hook(sctp_assoc_request, 0, asoc, skb);
2389}
2390EXPORT_SYMBOL(security_sctp_assoc_request);
2391
2392int security_sctp_bind_connect(struct sock *sk, int optname,
2393 struct sockaddr *address, int addrlen)
2394{
2395 return call_int_hook(sctp_bind_connect, 0, sk, optname,
2396 address, addrlen);
2397}
2398EXPORT_SYMBOL(security_sctp_bind_connect);
2399
2400void security_sctp_sk_clone(struct sctp_association *asoc, struct sock *sk,
2401 struct sock *newsk)
2402{
2403 call_void_hook(sctp_sk_clone, asoc, sk, newsk);
2404}
2405EXPORT_SYMBOL(security_sctp_sk_clone);
2406
2407int security_sctp_assoc_established(struct sctp_association *asoc,
2408 struct sk_buff *skb)
2409{
2410 return call_int_hook(sctp_assoc_established, 0, asoc, skb);
2411}
2412EXPORT_SYMBOL(security_sctp_assoc_established);
2413
2414#endif /* CONFIG_SECURITY_NETWORK */
2415
2416#ifdef CONFIG_SECURITY_INFINIBAND
2417
2418int security_ib_pkey_access(void *sec, u64 subnet_prefix, u16 pkey)
2419{
2420 return call_int_hook(ib_pkey_access, 0, sec, subnet_prefix, pkey);
2421}
2422EXPORT_SYMBOL(security_ib_pkey_access);
2423
2424int security_ib_endport_manage_subnet(void *sec, const char *dev_name, u8 port_num)
2425{
2426 return call_int_hook(ib_endport_manage_subnet, 0, sec, dev_name, port_num);
2427}
2428EXPORT_SYMBOL(security_ib_endport_manage_subnet);
2429
2430int security_ib_alloc_security(void **sec)
2431{
2432 return call_int_hook(ib_alloc_security, 0, sec);
2433}
2434EXPORT_SYMBOL(security_ib_alloc_security);
2435
2436void security_ib_free_security(void *sec)
2437{
2438 call_void_hook(ib_free_security, sec);
2439}
2440EXPORT_SYMBOL(security_ib_free_security);
2441#endif /* CONFIG_SECURITY_INFINIBAND */
2442
2443#ifdef CONFIG_SECURITY_NETWORK_XFRM
2444
2445int security_xfrm_policy_alloc(struct xfrm_sec_ctx **ctxp,
2446 struct xfrm_user_sec_ctx *sec_ctx,
2447 gfp_t gfp)
2448{
2449 return call_int_hook(xfrm_policy_alloc_security, 0, ctxp, sec_ctx, gfp);
2450}
2451EXPORT_SYMBOL(security_xfrm_policy_alloc);
2452
2453int security_xfrm_policy_clone(struct xfrm_sec_ctx *old_ctx,
2454 struct xfrm_sec_ctx **new_ctxp)
2455{
2456 return call_int_hook(xfrm_policy_clone_security, 0, old_ctx, new_ctxp);
2457}
2458
2459void security_xfrm_policy_free(struct xfrm_sec_ctx *ctx)
2460{
2461 call_void_hook(xfrm_policy_free_security, ctx);
2462}
2463EXPORT_SYMBOL(security_xfrm_policy_free);
2464
2465int security_xfrm_policy_delete(struct xfrm_sec_ctx *ctx)
2466{
2467 return call_int_hook(xfrm_policy_delete_security, 0, ctx);
2468}
2469
2470int security_xfrm_state_alloc(struct xfrm_state *x,
2471 struct xfrm_user_sec_ctx *sec_ctx)
2472{
2473 return call_int_hook(xfrm_state_alloc, 0, x, sec_ctx);
2474}
2475EXPORT_SYMBOL(security_xfrm_state_alloc);
2476
2477int security_xfrm_state_alloc_acquire(struct xfrm_state *x,
2478 struct xfrm_sec_ctx *polsec, u32 secid)
2479{
2480 return call_int_hook(xfrm_state_alloc_acquire, 0, x, polsec, secid);
2481}
2482
2483int security_xfrm_state_delete(struct xfrm_state *x)
2484{
2485 return call_int_hook(xfrm_state_delete_security, 0, x);
2486}
2487EXPORT_SYMBOL(security_xfrm_state_delete);
2488
2489void security_xfrm_state_free(struct xfrm_state *x)
2490{
2491 call_void_hook(xfrm_state_free_security, x);
2492}
2493
2494int security_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid)
2495{
2496 return call_int_hook(xfrm_policy_lookup, 0, ctx, fl_secid);
2497}
2498
2499int security_xfrm_state_pol_flow_match(struct xfrm_state *x,
2500 struct xfrm_policy *xp,
2501 const struct flowi_common *flic)
2502{
2503 struct security_hook_list *hp;
2504 int rc = LSM_RET_DEFAULT(xfrm_state_pol_flow_match);
2505
2506 /*
2507 * Since this function is expected to return 0 or 1, the judgment
2508 * becomes difficult if multiple LSMs supply this call. Fortunately,
2509 * we can use the first LSM's judgment because currently only SELinux
2510 * supplies this call.
2511 *
2512 * For speed optimization, we explicitly break the loop rather than
2513 * using the macro
2514 */
2515 hlist_for_each_entry(hp, &security_hook_heads.xfrm_state_pol_flow_match,
2516 list) {
2517 rc = hp->hook.xfrm_state_pol_flow_match(x, xp, flic);
2518 break;
2519 }
2520 return rc;
2521}
2522
2523int security_xfrm_decode_session(struct sk_buff *skb, u32 *secid)
2524{
2525 return call_int_hook(xfrm_decode_session, 0, skb, secid, 1);
2526}
2527
2528void security_skb_classify_flow(struct sk_buff *skb, struct flowi_common *flic)
2529{
2530 int rc = call_int_hook(xfrm_decode_session, 0, skb, &flic->flowic_secid,
2531 0);
2532
2533 BUG_ON(rc);
2534}
2535EXPORT_SYMBOL(security_skb_classify_flow);
2536
2537#endif /* CONFIG_SECURITY_NETWORK_XFRM */
2538
2539#ifdef CONFIG_KEYS
2540
2541int security_key_alloc(struct key *key, const struct cred *cred,
2542 unsigned long flags)
2543{
2544 return call_int_hook(key_alloc, 0, key, cred, flags);
2545}
2546
2547void security_key_free(struct key *key)
2548{
2549 call_void_hook(key_free, key);
2550}
2551
2552int security_key_permission(key_ref_t key_ref, const struct cred *cred,
2553 enum key_need_perm need_perm)
2554{
2555 return call_int_hook(key_permission, 0, key_ref, cred, need_perm);
2556}
2557
2558int security_key_getsecurity(struct key *key, char **_buffer)
2559{
2560 *_buffer = NULL;
2561 return call_int_hook(key_getsecurity, 0, key, _buffer);
2562}
2563
2564#endif /* CONFIG_KEYS */
2565
2566#ifdef CONFIG_AUDIT
2567
2568int security_audit_rule_init(u32 field, u32 op, char *rulestr, void **lsmrule)
2569{
2570 return call_int_hook(audit_rule_init, 0, field, op, rulestr, lsmrule);
2571}
2572
2573int security_audit_rule_known(struct audit_krule *krule)
2574{
2575 return call_int_hook(audit_rule_known, 0, krule);
2576}
2577
2578void security_audit_rule_free(void *lsmrule)
2579{
2580 call_void_hook(audit_rule_free, lsmrule);
2581}
2582
2583int security_audit_rule_match(u32 secid, u32 field, u32 op, void *lsmrule)
2584{
2585 return call_int_hook(audit_rule_match, 0, secid, field, op, lsmrule);
2586}
2587#endif /* CONFIG_AUDIT */
2588
2589#ifdef CONFIG_BPF_SYSCALL
2590int security_bpf(int cmd, union bpf_attr *attr, unsigned int size)
2591{
2592 return call_int_hook(bpf, 0, cmd, attr, size);
2593}
2594int security_bpf_map(struct bpf_map *map, fmode_t fmode)
2595{
2596 return call_int_hook(bpf_map, 0, map, fmode);
2597}
2598int security_bpf_prog(struct bpf_prog *prog)
2599{
2600 return call_int_hook(bpf_prog, 0, prog);
2601}
2602int security_bpf_map_alloc(struct bpf_map *map)
2603{
2604 return call_int_hook(bpf_map_alloc_security, 0, map);
2605}
2606int security_bpf_prog_alloc(struct bpf_prog_aux *aux)
2607{
2608 return call_int_hook(bpf_prog_alloc_security, 0, aux);
2609}
2610void security_bpf_map_free(struct bpf_map *map)
2611{
2612 call_void_hook(bpf_map_free_security, map);
2613}
2614void security_bpf_prog_free(struct bpf_prog_aux *aux)
2615{
2616 call_void_hook(bpf_prog_free_security, aux);
2617}
2618#endif /* CONFIG_BPF_SYSCALL */
2619
2620int security_locked_down(enum lockdown_reason what)
2621{
2622 return call_int_hook(locked_down, 0, what);
2623}
2624EXPORT_SYMBOL(security_locked_down);
2625
2626#ifdef CONFIG_PERF_EVENTS
2627int security_perf_event_open(struct perf_event_attr *attr, int type)
2628{
2629 return call_int_hook(perf_event_open, 0, attr, type);
2630}
2631
2632int security_perf_event_alloc(struct perf_event *event)
2633{
2634 return call_int_hook(perf_event_alloc, 0, event);
2635}
2636
2637void security_perf_event_free(struct perf_event *event)
2638{
2639 call_void_hook(perf_event_free, event);
2640}
2641
2642int security_perf_event_read(struct perf_event *event)
2643{
2644 return call_int_hook(perf_event_read, 0, event);
2645}
2646
2647int security_perf_event_write(struct perf_event *event)
2648{
2649 return call_int_hook(perf_event_write, 0, event);
2650}
2651#endif /* CONFIG_PERF_EVENTS */
2652
2653#ifdef CONFIG_IO_URING
2654int security_uring_override_creds(const struct cred *new)
2655{
2656 return call_int_hook(uring_override_creds, 0, new);
2657}
2658
2659int security_uring_sqpoll(void)
2660{
2661 return call_int_hook(uring_sqpoll, 0);
2662}
2663#endif /* CONFIG_IO_URING */