security/security.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Security plug functions
   4  *
   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
   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  */
  44 const 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_DEVICE_TREE] = "modifying device tree contents",
  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_BPF_WRITE_USER] = "use of bpf to write user RAM",
  63         [LOCKDOWN_DBG_WRITE_KERNEL] = "use of kgdb/kdb to write kernel RAM",
  64         [LOCKDOWN_RTAS_ERROR_INJECTION] = "RTAS error injection",
  65         [LOCKDOWN_INTEGRITY_MAX] = "integrity",
  66         [LOCKDOWN_KCORE] = "/proc/kcore access",
  67         [LOCKDOWN_KPROBES] = "use of kprobes",
  68         [LOCKDOWN_BPF_READ_KERNEL] = "use of bpf to read kernel RAM",
  69         [LOCKDOWN_DBG_READ_KERNEL] = "use of kgdb/kdb to read kernel RAM",
  70         [LOCKDOWN_PERF] = "unsafe use of perf",
  71         [LOCKDOWN_TRACEFS] = "use of tracefs",
  72         [LOCKDOWN_XMON_RW] = "xmon read and write access",
  73         [LOCKDOWN_XFRM_SECRET] = "xfrm SA secret",
  74         [LOCKDOWN_CONFIDENTIALITY_MAX] = "confidentiality",
  75 };
  76
  77 struct security_hook_heads security_hook_heads __lsm_ro_after_init;
  78 static BLOCKING_NOTIFIER_HEAD(blocking_lsm_notifier_chain);
  79
  80 static struct kmem_cache *lsm_file_cache;
  81 static struct kmem_cache *lsm_inode_cache;
  82
  83 char *lsm_names;
  84 static struct lsm_blob_sizes blob_sizes __lsm_ro_after_init;
  85
  86 /* Boot-time LSM user choice */
  87 static __initdata const char *chosen_lsm_order;
  88 static __initdata const char *chosen_major_lsm;
  89
  90 static __initconst const char * const builtin_lsm_order = CONFIG_LSM;
  91
  92 /* Ordered list of LSMs to initialize. */
  93 static __initdata struct lsm_info **ordered_lsms;
  94 static __initdata struct lsm_info *exclusive;
  95
  96 static __initdata bool debug;
  97 #define init_debug(...)                                         \
  98         do {                                                    \
  99                 if (debug)                                      \
 100                         pr_info(__VA_ARGS__);                   \
 101         } while (0)
 102
 103 static bool __init is_enabled(struct lsm_info *lsm)
 104 {
 105         if (!lsm->enabled)
 106                 return false;
 107
 108         return *lsm->enabled;
 109 }
 110
 111 /* Mark an LSM's enabled flag. */
 112 static int lsm_enabled_true __initdata = 1;
 113 static int lsm_enabled_false __initdata = 0;
 114 static void __init set_enabled(struct lsm_info *lsm, bool enabled)
 115 {
 116         /*
 117          * When an LSM hasn't configured an enable variable, we can use
 118          * a hard-coded location for storing the default enabled state.
 119          */
 120         if (!lsm->enabled) {
 121                 if (enabled)
 122                         lsm->enabled = &lsm_enabled_true;
 123                 else
 124                         lsm->enabled = &lsm_enabled_false;
 125         } else if (lsm->enabled == &lsm_enabled_true) {
 126                 if (!enabled)
 127                         lsm->enabled = &lsm_enabled_false;
 128         } else if (lsm->enabled == &lsm_enabled_false) {
 129                 if (enabled)
 130                         lsm->enabled = &lsm_enabled_true;
 131         } else {
 132                 *lsm->enabled = enabled;
 133         }
 134 }
 135
 136 /* Is an LSM already listed in the ordered LSMs list? */
 137 static bool __init exists_ordered_lsm(struct lsm_info *lsm)
 138 {
 139         struct lsm_info **check;
 140
 141         for (check = ordered_lsms; *check; check++)
 142                 if (*check == lsm)
 143                         return true;
 144
 145         return false;
 146 }
 147
 148 /* Append an LSM to the list of ordered LSMs to initialize. */
 149 static int last_lsm __initdata;
 150 static void __init append_ordered_lsm(struct lsm_info *lsm, const char *from)
 151 {
 152         /* Ignore duplicate selections. */
 153         if (exists_ordered_lsm(lsm))
 154                 return;
 155
 156         if (WARN(last_lsm == LSM_COUNT, "%s: out of LSM slots!?\n", from))
 157                 return;
 158
 159         /* Enable this LSM, if it is not already set. */
 160         if (!lsm->enabled)
 161                 lsm->enabled = &lsm_enabled_true;
 162         ordered_lsms[last_lsm++] = lsm;
 163
 164         init_debug("%s ordering: %s (%sabled)\n", from, lsm->name,
 165                    is_enabled(lsm) ? "en" : "dis");
 166 }
 167
 168 /* Is an LSM allowed to be initialized? */
 169 static bool __init lsm_allowed(struct lsm_info *lsm)
 170 {
 171         /* Skip if the LSM is disabled. */
 172         if (!is_enabled(lsm))
 173                 return false;
 174
 175         /* Not allowed if another exclusive LSM already initialized. */
 176         if ((lsm->flags & LSM_FLAG_EXCLUSIVE) && exclusive) {
 177                 init_debug("exclusive disabled: %s\n", lsm->name);
 178                 return false;
 179         }
 180
 181         return true;
 182 }
 183
 184 static void __init lsm_set_blob_size(int *need, int *lbs)
 185 {
 186         int offset;
 187
 188         if (*need > 0) {
 189                 offset = *lbs;
 190                 *lbs += *need;
 191                 *need = offset;
 192         }
 193 }
 194
 195 static void __init lsm_set_blob_sizes(struct lsm_blob_sizes *needed)
 196 {
 197         if (!needed)
 198                 return;
 199
 200         lsm_set_blob_size(&needed->lbs_cred, &blob_sizes.lbs_cred);
 201         lsm_set_blob_size(&needed->lbs_file, &blob_sizes.lbs_file);
 202         /*
 203          * The inode blob gets an rcu_head in addition to
 204          * what the modules might need.
 205          */
 206         if (needed->lbs_inode && blob_sizes.lbs_inode == 0)
 207                 blob_sizes.lbs_inode = sizeof(struct rcu_head);
 208         lsm_set_blob_size(&needed->lbs_inode, &blob_sizes.lbs_inode);
 209         lsm_set_blob_size(&needed->lbs_ipc, &blob_sizes.lbs_ipc);
 210         lsm_set_blob_size(&needed->lbs_msg_msg, &blob_sizes.lbs_msg_msg);
 211         lsm_set_blob_size(&needed->lbs_superblock, &blob_sizes.lbs_superblock);
 212         lsm_set_blob_size(&needed->lbs_task, &blob_sizes.lbs_task);
 213 }
 214
 215 /* Prepare LSM for initialization. */
 216 static void __init prepare_lsm(struct lsm_info *lsm)
 217 {
 218         int enabled = lsm_allowed(lsm);
 219
 220         /* Record enablement (to handle any following exclusive LSMs). */
 221         set_enabled(lsm, enabled);
 222
 223         /* If enabled, do pre-initialization work. */
 224         if (enabled) {
 225                 if ((lsm->flags & LSM_FLAG_EXCLUSIVE) && !exclusive) {
 226                         exclusive = lsm;
 227                         init_debug("exclusive chosen: %s\n", lsm->name);
 228                 }
 229
 230                 lsm_set_blob_sizes(lsm->blobs);
 231         }
 232 }
 233
 234 /* Initialize a given LSM, if it is enabled. */
 235 static void __init initialize_lsm(struct lsm_info *lsm)
 236 {
 237         if (is_enabled(lsm)) {
 238                 int ret;
 239
 240                 init_debug("initializing %s\n", lsm->name);
 241                 ret = lsm->init();
 242                 WARN(ret, "%s failed to initialize: %d\n", lsm->name, ret);
 243         }
 244 }
 245
 246 /* Populate ordered LSMs list from comma-separated LSM name list. */
 247 static void __init ordered_lsm_parse(const char *order, const char *origin)
 248 {
 249         struct lsm_info *lsm;
 250         char *sep, *name, *next;
 251
 252         /* LSM_ORDER_FIRST is always first. */
 253         for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) {
 254                 if (lsm->order == LSM_ORDER_FIRST)
 255                         append_ordered_lsm(lsm, "first");
 256         }
 257
 258         /* Process "security=", if given. */
 259         if (chosen_major_lsm) {
 260                 struct lsm_info *major;
 261
 262                 /*
 263                  * To match the original "security=" behavior, this
 264                  * explicitly does NOT fallback to another Legacy Major
 265                  * if the selected one was separately disabled: disable
 266                  * all non-matching Legacy Major LSMs.
 267                  */
 268                 for (major = __start_lsm_info; major < __end_lsm_info;
 269                      major++) {
 270                         if ((major->flags & LSM_FLAG_LEGACY_MAJOR) &&
 271                             strcmp(major->name, chosen_major_lsm) != 0) {
 272                                 set_enabled(major, false);
 273                                 init_debug("security=%s disabled: %s\n",
 274                                            chosen_major_lsm, major->name);
 275                         }
 276                 }
 277         }
 278
 279         sep = kstrdup(order, GFP_KERNEL);
 280         next = sep;
 281         /* Walk the list, looking for matching LSMs. */
 282         while ((name = strsep(&next, ",")) != NULL) {
 283                 bool found = false;
 284
 285                 for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) {
 286                         if (lsm->order == LSM_ORDER_MUTABLE &&
 287                             strcmp(lsm->name, name) == 0) {
 288                                 append_ordered_lsm(lsm, origin);
 289                                 found = true;
 290                         }
 291                 }
 292
 293                 if (!found)
 294                         init_debug("%s ignored: %s\n", origin, name);
 295         }
 296
 297         /* Process "security=", if given. */
 298         if (chosen_major_lsm) {
 299                 for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) {
 300                         if (exists_ordered_lsm(lsm))
 301                                 continue;
 302                         if (strcmp(lsm->name, chosen_major_lsm) == 0)
 303                                 append_ordered_lsm(lsm, "security=");
 304                 }
 305         }
 306
 307         /* Disable all LSMs not in the ordered list. */
 308         for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) {
 309                 if (exists_ordered_lsm(lsm))
 310                         continue;
 311                 set_enabled(lsm, false);
 312                 init_debug("%s disabled: %s\n", origin, lsm->name);
 313         }
 314
 315         kfree(sep);
 316 }
 317
 318 static void __init lsm_early_cred(struct cred *cred);
 319 static void __init lsm_early_task(struct task_struct *task);
 320
 321 static int lsm_append(const char *new, char **result);
 322
 323 static void __init ordered_lsm_init(void)
 324 {
 325         struct lsm_info **lsm;
 326
 327         ordered_lsms = kcalloc(LSM_COUNT + 1, sizeof(*ordered_lsms),
 328                                 GFP_KERNEL);
 329
 330         if (chosen_lsm_order) {
 331                 if (chosen_major_lsm) {
 332                         pr_info("security= is ignored because it is superseded by lsm=\n");
 333                         chosen_major_lsm = NULL;
 334                 }
 335                 ordered_lsm_parse(chosen_lsm_order, "cmdline");
 336         } else
 337                 ordered_lsm_parse(builtin_lsm_order, "builtin");
 338
 339         for (lsm = ordered_lsms; *lsm; lsm++)
 340                 prepare_lsm(*lsm);
 341
 342         init_debug("cred blob size       = %d\n", blob_sizes.lbs_cred);
 343         init_debug("file blob size       = %d\n", blob_sizes.lbs_file);
 344         init_debug("inode blob size      = %d\n", blob_sizes.lbs_inode);
 345         init_debug("ipc blob size        = %d\n", blob_sizes.lbs_ipc);
 346         init_debug("msg_msg blob size    = %d\n", blob_sizes.lbs_msg_msg);
 347         init_debug("superblock blob size = %d\n", blob_sizes.lbs_superblock);
 348         init_debug("task blob size       = %d\n", blob_sizes.lbs_task);
 349
 350         /*
 351          * Create any kmem_caches needed for blobs
 352          */
 353         if (blob_sizes.lbs_file)
 354                 lsm_file_cache = kmem_cache_create("lsm_file_cache",
 355                                                    blob_sizes.lbs_file, 0,
 356                                                    SLAB_PANIC, NULL);
 357         if (blob_sizes.lbs_inode)
 358                 lsm_inode_cache = kmem_cache_create("lsm_inode_cache",
 359                                                     blob_sizes.lbs_inode, 0,
 360                                                     SLAB_PANIC, NULL);
 361
 362         lsm_early_cred((struct cred *) current->cred);
 363         lsm_early_task(current);
 364         for (lsm = ordered_lsms; *lsm; lsm++)
 365                 initialize_lsm(*lsm);
 366
 367         kfree(ordered_lsms);
 368 }
 369
 370 int __init early_security_init(void)
 371 {
 372         struct lsm_info *lsm;
 373
 374 #define LSM_HOOK(RET, DEFAULT, NAME, ...) \
 375         INIT_HLIST_HEAD(&security_hook_heads.NAME);
 376 #include "linux/lsm_hook_defs.h"
 377 #undef LSM_HOOK
 378
 379         for (lsm = __start_early_lsm_info; lsm < __end_early_lsm_info; lsm++) {
 380                 if (!lsm->enabled)
 381                         lsm->enabled = &lsm_enabled_true;
 382                 prepare_lsm(lsm);
 383                 initialize_lsm(lsm);
 384         }
 385
 386         return 0;
 387 }
 388
 389 /**
 390  * security_init - initializes the security framework
 391  *
 392  * This should be called early in the kernel initialization sequence.
 393  */
 394 int __init security_init(void)
 395 {
 396         struct lsm_info *lsm;
 397
 398         pr_info("Security Framework initializing\n");
 399
 400         /*
 401          * Append the names of the early LSM modules now that kmalloc() is
 402          * available
 403          */
 404         for (lsm = __start_early_lsm_info; lsm < __end_early_lsm_info; lsm++) {
 405                 if (lsm->enabled)
 406                         lsm_append(lsm->name, &lsm_names);
 407         }
 408
 409         /* Load LSMs in specified order. */
 410         ordered_lsm_init();
 411
 412         return 0;
 413 }
 414
 415 /* Save user chosen LSM */
 416 static int __init choose_major_lsm(char *str)
 417 {
 418         chosen_major_lsm = str;
 419         return 1;
 420 }
 421 __setup("security=", choose_major_lsm);
 422
 423 /* Explicitly choose LSM initialization order. */
 424 static int __init choose_lsm_order(char *str)
 425 {
 426         chosen_lsm_order = str;
 427         return 1;
 428 }
 429 __setup("lsm=", choose_lsm_order);
 430
 431 /* Enable LSM order debugging. */
 432 static int __init enable_debug(char *str)
 433 {
 434         debug = true;
 435         return 1;
 436 }
 437 __setup("lsm.debug", enable_debug);
 438
 439 static bool match_last_lsm(const char *list, const char *lsm)
 440 {
 441         const char *last;
 442
 443         if (WARN_ON(!list || !lsm))
 444                 return false;
 445         last = strrchr(list, ',');
 446         if (last)
 447                 /* Pass the comma, strcmp() will check for '\0' */
 448                 last++;
 449         else
 450                 last = list;
 451         return !strcmp(last, lsm);
 452 }
 453
 454 static int lsm_append(const char *new, char **result)
 455 {
 456         char *cp;
 457
 458         if (*result == NULL) {
 459                 *result = kstrdup(new, GFP_KERNEL);
 460                 if (*result == NULL)
 461                         return -ENOMEM;
 462         } else {
 463                 /* Check if it is the last registered name */
 464                 if (match_last_lsm(*result, new))
 465                         return 0;
 466                 cp = kasprintf(GFP_KERNEL, "%s,%s", *result, new);
 467                 if (cp == NULL)
 468                         return -ENOMEM;
 469                 kfree(*result);
 470                 *result = cp;
 471         }
 472         return 0;
 473 }
 474
 475 /**
 476  * security_add_hooks - Add a modules hooks to the hook lists.
 477  * @hooks: the hooks to add
 478  * @count: the number of hooks to add
 479  * @lsm: the name of the security module
 480  *
 481  * Each LSM has to register its hooks with the infrastructure.
 482  */
 483 void __init security_add_hooks(struct security_hook_list *hooks, int count,
 484                                 const char *lsm)
 485 {
 486         int i;
 487
 488         for (i = 0; i < count; i++) {
 489                 hooks[i].lsm = lsm;
 490                 hlist_add_tail_rcu(&hooks[i].list, hooks[i].head);
 491         }
 492
 493         /*
 494          * Don't try to append during early_security_init(), we'll come back
 495          * and fix this up afterwards.
 496          */
 497         if (slab_is_available()) {
 498                 if (lsm_append(lsm, &lsm_names) < 0)
 499                         panic("%s - Cannot get early memory.\n", __func__);
 500         }
 501 }
 502
 503 int call_blocking_lsm_notifier(enum lsm_event event, void *data)
 504 {
 505         return blocking_notifier_call_chain(&blocking_lsm_notifier_chain,
 506                                             event, data);
 507 }
 508 EXPORT_SYMBOL(call_blocking_lsm_notifier);
 509
 510 int register_blocking_lsm_notifier(struct notifier_block *nb)
 511 {
 512         return blocking_notifier_chain_register(&blocking_lsm_notifier_chain,
 513                                                 nb);
 514 }
 515 EXPORT_SYMBOL(register_blocking_lsm_notifier);
 516
 517 int unregister_blocking_lsm_notifier(struct notifier_block *nb)
 518 {
 519         return blocking_notifier_chain_unregister(&blocking_lsm_notifier_chain,
 520                                                   nb);
 521 }
 522 EXPORT_SYMBOL(unregister_blocking_lsm_notifier);
 523
 524 /**
 525  * lsm_cred_alloc - allocate a composite cred blob
 526  * @cred: the cred that needs a blob
 527  * @gfp: allocation type
 528  *
 529  * Allocate the cred blob for all the modules
 530  *
 531  * Returns 0, or -ENOMEM if memory can't be allocated.
 532  */
 533 static int lsm_cred_alloc(struct cred *cred, gfp_t gfp)
 534 {
 535         if (blob_sizes.lbs_cred == 0) {
 536                 cred->security = NULL;
 537                 return 0;
 538         }
 539
 540         cred->security = kzalloc(blob_sizes.lbs_cred, gfp);
 541         if (cred->security == NULL)
 542                 return -ENOMEM;
 543         return 0;
 544 }
 545
 546 /**
 547  * lsm_early_cred - during initialization allocate a composite cred blob
 548  * @cred: the cred that needs a blob
 549  *
 550  * Allocate the cred blob for all the modules
 551  */
 552 static void __init lsm_early_cred(struct cred *cred)
 553 {
 554         int rc = lsm_cred_alloc(cred, GFP_KERNEL);
 555
 556         if (rc)
 557                 panic("%s: Early cred alloc failed.\n", __func__);
 558 }
 559
 560 /**
 561  * lsm_file_alloc - allocate a composite file blob
 562  * @file: the file that needs a blob
 563  *
 564  * Allocate the file blob for all the modules
 565  *
 566  * Returns 0, or -ENOMEM if memory can't be allocated.
 567  */
 568 static int lsm_file_alloc(struct file *file)
 569 {
 570         if (!lsm_file_cache) {
 571                 file->f_security = NULL;
 572                 return 0;
 573         }
 574
 575         file->f_security = kmem_cache_zalloc(lsm_file_cache, GFP_KERNEL);
 576         if (file->f_security == NULL)
 577                 return -ENOMEM;
 578         return 0;
 579 }
 580
 581 /**
 582  * lsm_inode_alloc - allocate a composite inode blob
 583  * @inode: the inode that needs a blob
 584  *
 585  * Allocate the inode blob for all the modules
 586  *
 587  * Returns 0, or -ENOMEM if memory can't be allocated.
 588  */
 589 int lsm_inode_alloc(struct inode *inode)
 590 {
 591         if (!lsm_inode_cache) {
 592                 inode->i_security = NULL;
 593                 return 0;
 594         }
 595
 596         inode->i_security = kmem_cache_zalloc(lsm_inode_cache, GFP_NOFS);
 597         if (inode->i_security == NULL)
 598                 return -ENOMEM;
 599         return 0;
 600 }
 601
 602 /**
 603  * lsm_task_alloc - allocate a composite task blob
 604  * @task: the task that needs a blob
 605  *
 606  * Allocate the task blob for all the modules
 607  *
 608  * Returns 0, or -ENOMEM if memory can't be allocated.
 609  */
 610 static int lsm_task_alloc(struct task_struct *task)
 611 {
 612         if (blob_sizes.lbs_task == 0) {
 613                 task->security = NULL;
 614                 return 0;
 615         }
 616
 617         task->security = kzalloc(blob_sizes.lbs_task, GFP_KERNEL);
 618         if (task->security == NULL)
 619                 return -ENOMEM;
 620         return 0;
 621 }
 622
 623 /**
 624  * lsm_ipc_alloc - allocate a composite ipc blob
 625  * @kip: the ipc that needs a blob
 626  *
 627  * Allocate the ipc blob for all the modules
 628  *
 629  * Returns 0, or -ENOMEM if memory can't be allocated.
 630  */
 631 static int lsm_ipc_alloc(struct kern_ipc_perm *kip)
 632 {
 633         if (blob_sizes.lbs_ipc == 0) {
 634                 kip->security = NULL;
 635                 return 0;
 636         }
 637
 638         kip->security = kzalloc(blob_sizes.lbs_ipc, GFP_KERNEL);
 639         if (kip->security == NULL)
 640                 return -ENOMEM;
 641         return 0;
 642 }
 643
 644 /**
 645  * lsm_msg_msg_alloc - allocate a composite msg_msg blob
 646  * @mp: the msg_msg that needs a blob
 647  *
 648  * Allocate the ipc blob for all the modules
 649  *
 650  * Returns 0, or -ENOMEM if memory can't be allocated.
 651  */
 652 static int lsm_msg_msg_alloc(struct msg_msg *mp)
 653 {
 654         if (blob_sizes.lbs_msg_msg == 0) {
 655                 mp->security = NULL;
 656                 return 0;
 657         }
 658
 659         mp->security = kzalloc(blob_sizes.lbs_msg_msg, GFP_KERNEL);
 660         if (mp->security == NULL)
 661                 return -ENOMEM;
 662         return 0;
 663 }
 664
 665 /**
 666  * lsm_early_task - during initialization allocate a composite task blob
 667  * @task: the task that needs a blob
 668  *
 669  * Allocate the task blob for all the modules
 670  */
 671 static void __init lsm_early_task(struct task_struct *task)
 672 {
 673         int rc = lsm_task_alloc(task);
 674
 675         if (rc)
 676                 panic("%s: Early task alloc failed.\n", __func__);
 677 }
 678
 679 /**
 680  * lsm_superblock_alloc - allocate a composite superblock blob
 681  * @sb: the superblock that needs a blob
 682  *
 683  * Allocate the superblock blob for all the modules
 684  *
 685  * Returns 0, or -ENOMEM if memory can't be allocated.
 686  */
 687 static int lsm_superblock_alloc(struct super_block *sb)
 688 {
 689         if (blob_sizes.lbs_superblock == 0) {
 690                 sb->s_security = NULL;
 691                 return 0;
 692         }
 693
 694         sb->s_security = kzalloc(blob_sizes.lbs_superblock, GFP_KERNEL);
 695         if (sb->s_security == NULL)
 696                 return -ENOMEM;
 697         return 0;
 698 }
 699
 700 /*
 701  * The default value of the LSM hook is defined in linux/lsm_hook_defs.h and
 702  * can be accessed with:
 703  *
 704  *      LSM_RET_DEFAULT(<hook_name>)
 705  *
 706  * The macros below define static constants for the default value of each
 707  * LSM hook.
 708  */
 709 #define LSM_RET_DEFAULT(NAME) (NAME##_default)
 710 #define DECLARE_LSM_RET_DEFAULT_void(DEFAULT, NAME)
 711 #define DECLARE_LSM_RET_DEFAULT_int(DEFAULT, NAME) \
 712         static const int __maybe_unused LSM_RET_DEFAULT(NAME) = (DEFAULT);
 713 #define LSM_HOOK(RET, DEFAULT, NAME, ...) \
 714         DECLARE_LSM_RET_DEFAULT_##RET(DEFAULT, NAME)
 715
 716 #include <linux/lsm_hook_defs.h>
 717 #undef LSM_HOOK
 718
 719 /*
 720  * Hook list operation macros.
 721  *
 722  * call_void_hook:
 723  *      This is a hook that does not return a value.
 724  *
 725  * call_int_hook:
 726  *      This is a hook that returns a value.
 727  */
 728
 729 #define call_void_hook(FUNC, ...)                               \
 730         do {                                                    \
 731                 struct security_hook_list *P;                   \
 732                                                                 \
 733                 hlist_for_each_entry(P, &security_hook_heads.FUNC, list) \
 734                         P->hook.FUNC(__VA_ARGS__);              \
 735         } while (0)
 736
 737 #define call_int_hook(FUNC, IRC, ...) ({                        \
 738         int RC = IRC;                                           \
 739         do {                                                    \
 740                 struct security_hook_list *P;                   \
 741                                                                 \
 742                 hlist_for_each_entry(P, &security_hook_heads.FUNC, list) { \
 743                         RC = P->hook.FUNC(__VA_ARGS__);         \
 744                         if (RC != 0)                            \
 745                                 break;                          \
 746                 }                                               \
 747         } while (0);                                            \
 748         RC;                                                     \
 749 })
 750
 751 /* Security operations */
 752
 753 int security_binder_set_context_mgr(const struct cred *mgr)
 754 {
 755         return call_int_hook(binder_set_context_mgr, 0, mgr);
 756 }
 757
 758 int security_binder_transaction(const struct cred *from,
 759                                 const struct cred *to)
 760 {
 761         return call_int_hook(binder_transaction, 0, from, to);
 762 }
 763
 764 int security_binder_transfer_binder(const struct cred *from,
 765                                     const struct cred *to)
 766 {
 767         return call_int_hook(binder_transfer_binder, 0, from, to);
 768 }
 769
 770 int security_binder_transfer_file(const struct cred *from,
 771                                   const struct cred *to, struct file *file)
 772 {
 773         return call_int_hook(binder_transfer_file, 0, from, to, file);
 774 }
 775
 776 int security_ptrace_access_check(struct task_struct *child, unsigned int mode)
 777 {
 778         return call_int_hook(ptrace_access_check, 0, child, mode);
 779 }
 780
 781 int security_ptrace_traceme(struct task_struct *parent)
 782 {
 783         return call_int_hook(ptrace_traceme, 0, parent);
 784 }
 785
 786 int security_capget(struct task_struct *target,
 787                      kernel_cap_t *effective,
 788                      kernel_cap_t *inheritable,
 789                      kernel_cap_t *permitted)
 790 {
 791         return call_int_hook(capget, 0, target,
 792                                 effective, inheritable, permitted);
 793 }
 794
 795 int security_capset(struct cred *new, const struct cred *old,
 796                     const kernel_cap_t *effective,
 797                     const kernel_cap_t *inheritable,
 798                     const kernel_cap_t *permitted)
 799 {
 800         return call_int_hook(capset, 0, new, old,
 801                                 effective, inheritable, permitted);
 802 }
 803
 804 int security_capable(const struct cred *cred,
 805                      struct user_namespace *ns,
 806                      int cap,
 807                      unsigned int opts)
 808 {
 809         return call_int_hook(capable, 0, cred, ns, cap, opts);
 810 }
 811
 812 int security_quotactl(int cmds, int type, int id, struct super_block *sb)
 813 {
 814         return call_int_hook(quotactl, 0, cmds, type, id, sb);
 815 }
 816
 817 int security_quota_on(struct dentry *dentry)
 818 {
 819         return call_int_hook(quota_on, 0, dentry);
 820 }
 821
 822 int security_syslog(int type)
 823 {
 824         return call_int_hook(syslog, 0, type);
 825 }
 826
 827 int security_settime64(const struct timespec64 *ts, const struct timezone *tz)
 828 {
 829         return call_int_hook(settime, 0, ts, tz);
 830 }
 831
 832 int security_vm_enough_memory_mm(struct mm_struct *mm, long pages)
 833 {
 834         struct security_hook_list *hp;
 835         int cap_sys_admin = 1;
 836         int rc;
 837
 838         /*
 839          * The module will respond with a positive value if
 840          * it thinks the __vm_enough_memory() call should be
 841          * made with the cap_sys_admin set. If all of the modules
 842          * agree that it should be set it will. If any module
 843          * thinks it should not be set it won't.
 844          */
 845         hlist_for_each_entry(hp, &security_hook_heads.vm_enough_memory, list) {
 846                 rc = hp->hook.vm_enough_memory(mm, pages);
 847                 if (rc <= 0) {
 848                         cap_sys_admin = 0;
 849                         break;
 850                 }
 851         }
 852         return __vm_enough_memory(mm, pages, cap_sys_admin);
 853 }
 854
 855 int security_bprm_creds_for_exec(struct linux_binprm *bprm)
 856 {
 857         return call_int_hook(bprm_creds_for_exec, 0, bprm);
 858 }
 859
 860 int security_bprm_creds_from_file(struct linux_binprm *bprm, struct file *file)
 861 {
 862         return call_int_hook(bprm_creds_from_file, 0, bprm, file);
 863 }
 864
 865 int security_bprm_check(struct linux_binprm *bprm)
 866 {
 867         int ret;
 868
 869         ret = call_int_hook(bprm_check_security, 0, bprm);
 870         if (ret)
 871                 return ret;
 872         return ima_bprm_check(bprm);
 873 }
 874
 875 void security_bprm_committing_creds(struct linux_binprm *bprm)
 876 {
 877         call_void_hook(bprm_committing_creds, bprm);
 878 }
 879
 880 void security_bprm_committed_creds(struct linux_binprm *bprm)
 881 {
 882         call_void_hook(bprm_committed_creds, bprm);
 883 }
 884
 885 int security_fs_context_dup(struct fs_context *fc, struct fs_context *src_fc)
 886 {
 887         return call_int_hook(fs_context_dup, 0, fc, src_fc);
 888 }
 889
 890 int security_fs_context_parse_param(struct fs_context *fc,
 891                                     struct fs_parameter *param)
 892 {
 893         struct security_hook_list *hp;
 894         int trc;
 895         int rc = -ENOPARAM;
 896
 897         hlist_for_each_entry(hp, &security_hook_heads.fs_context_parse_param,
 898                              list) {
 899                 trc = hp->hook.fs_context_parse_param(fc, param);
 900                 if (trc == 0)
 901                         rc = 0;
 902                 else if (trc != -ENOPARAM)
 903                         return trc;
 904         }
 905         return rc;
 906 }
 907
 908 int security_sb_alloc(struct super_block *sb)
 909 {
 910         int rc = lsm_superblock_alloc(sb);
 911
 912         if (unlikely(rc))
 913                 return rc;
 914         rc = call_int_hook(sb_alloc_security, 0, sb);
 915         if (unlikely(rc))
 916                 security_sb_free(sb);
 917         return rc;
 918 }
 919
 920 void security_sb_delete(struct super_block *sb)
 921 {
 922         call_void_hook(sb_delete, sb);
 923 }
 924
 925 void security_sb_free(struct super_block *sb)
 926 {
 927         call_void_hook(sb_free_security, sb);
 928         kfree(sb->s_security);
 929         sb->s_security = NULL;
 930 }
 931
 932 void security_free_mnt_opts(void **mnt_opts)
 933 {
 934         if (!*mnt_opts)
 935                 return;
 936         call_void_hook(sb_free_mnt_opts, *mnt_opts);
 937         *mnt_opts = NULL;
 938 }
 939 EXPORT_SYMBOL(security_free_mnt_opts);
 940
 941 int security_sb_eat_lsm_opts(char *options, void **mnt_opts)
 942 {
 943         return call_int_hook(sb_eat_lsm_opts, 0, options, mnt_opts);
 944 }
 945 EXPORT_SYMBOL(security_sb_eat_lsm_opts);
 946
 947 int security_sb_mnt_opts_compat(struct super_block *sb,
 948                                 void *mnt_opts)
 949 {
 950         return call_int_hook(sb_mnt_opts_compat, 0, sb, mnt_opts);
 951 }
 952 EXPORT_SYMBOL(security_sb_mnt_opts_compat);
 953
 954 int security_sb_remount(struct super_block *sb,
 955                         void *mnt_opts)
 956 {
 957         return call_int_hook(sb_remount, 0, sb, mnt_opts);
 958 }
 959 EXPORT_SYMBOL(security_sb_remount);
 960
 961 int security_sb_kern_mount(struct super_block *sb)
 962 {
 963         return call_int_hook(sb_kern_mount, 0, sb);
 964 }
 965
 966 int security_sb_show_options(struct seq_file *m, struct super_block *sb)
 967 {
 968         return call_int_hook(sb_show_options, 0, m, sb);
 969 }
 970
 971 int security_sb_statfs(struct dentry *dentry)
 972 {
 973         return call_int_hook(sb_statfs, 0, dentry);
 974 }
 975
 976 int security_sb_mount(const char *dev_name, const struct path *path,
 977                        const char *type, unsigned long flags, void *data)
 978 {
 979         return call_int_hook(sb_mount, 0, dev_name, path, type, flags, data);
 980 }
 981
 982 int security_sb_umount(struct vfsmount *mnt, int flags)
 983 {
 984         return call_int_hook(sb_umount, 0, mnt, flags);
 985 }
 986
 987 int security_sb_pivotroot(const struct path *old_path, const struct path *new_path)
 988 {
 989         return call_int_hook(sb_pivotroot, 0, old_path, new_path);
 990 }
 991
 992 int security_sb_set_mnt_opts(struct super_block *sb,
 993                                 void *mnt_opts,
 994                                 unsigned long kern_flags,
 995                                 unsigned long *set_kern_flags)
 996 {
 997         return call_int_hook(sb_set_mnt_opts,
 998                                 mnt_opts ? -EOPNOTSUPP : 0, sb,
 999                                 mnt_opts, kern_flags, set_kern_flags);
1000 }
1001 EXPORT_SYMBOL(security_sb_set_mnt_opts);
1002
1003 int security_sb_clone_mnt_opts(const struct super_block *oldsb,
1004                                 struct super_block *newsb,
1005                                 unsigned long kern_flags,
1006                                 unsigned long *set_kern_flags)
1007 {
1008         return call_int_hook(sb_clone_mnt_opts, 0, oldsb, newsb,
1009                                 kern_flags, set_kern_flags);
1010 }
1011 EXPORT_SYMBOL(security_sb_clone_mnt_opts);
1012
1013 int security_move_mount(const struct path *from_path, const struct path *to_path)
1014 {
1015         return call_int_hook(move_mount, 0, from_path, to_path);
1016 }
1017
1018 int security_path_notify(const struct path *path, u64 mask,
1019                                 unsigned int obj_type)
1020 {
1021         return call_int_hook(path_notify, 0, path, mask, obj_type);
1022 }
1023
1024 int security_inode_alloc(struct inode *inode)
1025 {
1026         int rc = lsm_inode_alloc(inode);
1027
1028         if (unlikely(rc))
1029                 return rc;
1030         rc = call_int_hook(inode_alloc_security, 0, inode);
1031         if (unlikely(rc))
1032                 security_inode_free(inode);
1033         return rc;
1034 }
1035
1036 static void inode_free_by_rcu(struct rcu_head *head)
1037 {
1038         /*
1039          * The rcu head is at the start of the inode blob
1040          */
1041         kmem_cache_free(lsm_inode_cache, head);
1042 }
1043
1044 void security_inode_free(struct inode *inode)
1045 {
1046         integrity_inode_free(inode);
1047         call_void_hook(inode_free_security, inode);
1048         /*
1049          * The inode may still be referenced in a path walk and
1050          * a call to security_inode_permission() can be made
1051          * after inode_free_security() is called. Ideally, the VFS
1052          * wouldn't do this, but fixing that is a much harder
1053          * job. For now, simply free the i_security via RCU, and
1054          * leave the current inode->i_security pointer intact.
1055          * The inode will be freed after the RCU grace period too.
1056          */
1057         if (inode->i_security)
1058                 call_rcu((struct rcu_head *)inode->i_security,
1059                                 inode_free_by_rcu);
1060 }
1061
1062 int security_dentry_init_security(struct dentry *dentry, int mode,
1063                                   const struct qstr *name,
1064                                   const char **xattr_name, void **ctx,
1065                                   u32 *ctxlen)
1066 {
1067         struct security_hook_list *hp;
1068         int rc;
1069
1070         /*
1071          * Only one module will provide a security context.
1072          */
1073         hlist_for_each_entry(hp, &security_hook_heads.dentry_init_security, list) {
1074                 rc = hp->hook.dentry_init_security(dentry, mode, name,
1075                                                    xattr_name, ctx, ctxlen);
1076                 if (rc != LSM_RET_DEFAULT(dentry_init_security))
1077                         return rc;
1078         }
1079         return LSM_RET_DEFAULT(dentry_init_security);
1080 }
1081 EXPORT_SYMBOL(security_dentry_init_security);
1082
1083 int security_dentry_create_files_as(struct dentry *dentry, int mode,
1084                                     struct qstr *name,
1085                                     const struct cred *old, struct cred *new)
1086 {
1087         return call_int_hook(dentry_create_files_as, 0, dentry, mode,
1088                                 name, old, new);
1089 }
1090 EXPORT_SYMBOL(security_dentry_create_files_as);
1091
1092 int security_inode_init_security(struct inode *inode, struct inode *dir,
1093                                  const struct qstr *qstr,
1094                                  const initxattrs initxattrs, void *fs_data)
1095 {
1096         struct xattr new_xattrs[MAX_LSM_EVM_XATTR + 1];
1097         struct xattr *lsm_xattr, *evm_xattr, *xattr;
1098         int ret;
1099
1100         if (unlikely(IS_PRIVATE(inode)))
1101                 return 0;
1102
1103         if (!initxattrs)
1104                 return call_int_hook(inode_init_security, -EOPNOTSUPP, inode,
1105                                      dir, qstr, NULL, NULL, NULL);
1106         memset(new_xattrs, 0, sizeof(new_xattrs));
1107         lsm_xattr = new_xattrs;
1108         ret = call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir, qstr,
1109                                                 &lsm_xattr->name,
1110                                                 &lsm_xattr->value,
1111                                                 &lsm_xattr->value_len);
1112         if (ret)
1113                 goto out;
1114
1115         evm_xattr = lsm_xattr + 1;
1116         ret = evm_inode_init_security(inode, lsm_xattr, evm_xattr);
1117         if (ret)
1118                 goto out;
1119         ret = initxattrs(inode, new_xattrs, fs_data);
1120 out:
1121         for (xattr = new_xattrs; xattr->value != NULL; xattr++)
1122                 kfree(xattr->value);
1123         return (ret == -EOPNOTSUPP) ? 0 : ret;
1124 }
1125 EXPORT_SYMBOL(security_inode_init_security);
1126
1127 int security_inode_init_security_anon(struct inode *inode,
1128                                       const struct qstr *name,
1129                                       const struct inode *context_inode)
1130 {
1131         return call_int_hook(inode_init_security_anon, 0, inode, name,
1132                              context_inode);
1133 }
1134
1135 int security_old_inode_init_security(struct inode *inode, struct inode *dir,
1136                                      const struct qstr *qstr, const char **name,
1137                                      void **value, size_t *len)
1138 {
1139         if (unlikely(IS_PRIVATE(inode)))
1140                 return -EOPNOTSUPP;
1141         return call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir,
1142                              qstr, name, value, len);
1143 }
1144 EXPORT_SYMBOL(security_old_inode_init_security);
1145
1146 #ifdef CONFIG_SECURITY_PATH
1147 int security_path_mknod(const struct path *dir, struct dentry *dentry, umode_t mode,
1148                         unsigned int dev)
1149 {
1150         if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
1151                 return 0;
1152         return call_int_hook(path_mknod, 0, dir, dentry, mode, dev);
1153 }
1154 EXPORT_SYMBOL(security_path_mknod);
1155
1156 int security_path_mkdir(const struct path *dir, struct dentry *dentry, umode_t mode)
1157 {
1158         if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
1159                 return 0;
1160         return call_int_hook(path_mkdir, 0, dir, dentry, mode);
1161 }
1162 EXPORT_SYMBOL(security_path_mkdir);
1163
1164 int security_path_rmdir(const struct path *dir, struct dentry *dentry)
1165 {
1166         if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
1167                 return 0;
1168         return call_int_hook(path_rmdir, 0, dir, dentry);
1169 }
1170
1171 int security_path_unlink(const struct path *dir, struct dentry *dentry)
1172 {
1173         if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
1174                 return 0;
1175         return call_int_hook(path_unlink, 0, dir, dentry);
1176 }
1177 EXPORT_SYMBOL(security_path_unlink);
1178
1179 int security_path_symlink(const struct path *dir, struct dentry *dentry,
1180                           const char *old_name)
1181 {
1182         if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
1183                 return 0;
1184         return call_int_hook(path_symlink, 0, dir, dentry, old_name);
1185 }
1186
1187 int security_path_link(struct dentry *old_dentry, const struct path *new_dir,
1188                        struct dentry *new_dentry)
1189 {
1190         if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry))))
1191                 return 0;
1192         return call_int_hook(path_link, 0, old_dentry, new_dir, new_dentry);
1193 }
1194
1195 int security_path_rename(const struct path *old_dir, struct dentry *old_dentry,
1196                          const struct path *new_dir, struct dentry *new_dentry,
1197                          unsigned int flags)
1198 {
1199         if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) ||
1200                      (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry)))))
1201                 return 0;
1202
1203         return call_int_hook(path_rename, 0, old_dir, old_dentry, new_dir,
1204                                 new_dentry, flags);
1205 }
1206 EXPORT_SYMBOL(security_path_rename);
1207
1208 int security_path_truncate(const struct path *path)
1209 {
1210         if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
1211                 return 0;
1212         return call_int_hook(path_truncate, 0, path);
1213 }
1214
1215 int security_path_chmod(const struct path *path, umode_t mode)
1216 {
1217         if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
1218                 return 0;
1219         return call_int_hook(path_chmod, 0, path, mode);
1220 }
1221
1222 int security_path_chown(const struct path *path, kuid_t uid, kgid_t gid)
1223 {
1224         if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
1225                 return 0;
1226         return call_int_hook(path_chown, 0, path, uid, gid);
1227 }
1228
1229 int security_path_chroot(const struct path *path)
1230 {
1231         return call_int_hook(path_chroot, 0, path);
1232 }
1233 #endif
1234
1235 int security_inode_create(struct inode *dir, struct dentry *dentry, umode_t mode)
1236 {
1237         if (unlikely(IS_PRIVATE(dir)))
1238                 return 0;
1239         return call_int_hook(inode_create, 0, dir, dentry, mode);
1240 }
1241 EXPORT_SYMBOL_GPL(security_inode_create);
1242
1243 int security_inode_link(struct dentry *old_dentry, struct inode *dir,
1244                          struct dentry *new_dentry)
1245 {
1246         if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry))))
1247                 return 0;
1248         return call_int_hook(inode_link, 0, old_dentry, dir, new_dentry);
1249 }
1250
1251 int security_inode_unlink(struct inode *dir, struct dentry *dentry)
1252 {
1253         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1254                 return 0;
1255         return call_int_hook(inode_unlink, 0, dir, dentry);
1256 }
1257
1258 int security_inode_symlink(struct inode *dir, struct dentry *dentry,
1259                             const char *old_name)
1260 {
1261         if (unlikely(IS_PRIVATE(dir)))
1262                 return 0;
1263         return call_int_hook(inode_symlink, 0, dir, dentry, old_name);
1264 }
1265
1266 int security_inode_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
1267 {
1268         if (unlikely(IS_PRIVATE(dir)))
1269                 return 0;
1270         return call_int_hook(inode_mkdir, 0, dir, dentry, mode);
1271 }
1272 EXPORT_SYMBOL_GPL(security_inode_mkdir);
1273
1274 int security_inode_rmdir(struct inode *dir, struct dentry *dentry)
1275 {
1276         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1277                 return 0;
1278         return call_int_hook(inode_rmdir, 0, dir, dentry);
1279 }
1280
1281 int security_inode_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t dev)
1282 {
1283         if (unlikely(IS_PRIVATE(dir)))
1284                 return 0;
1285         return call_int_hook(inode_mknod, 0, dir, dentry, mode, dev);
1286 }
1287
1288 int security_inode_rename(struct inode *old_dir, struct dentry *old_dentry,
1289                            struct inode *new_dir, struct dentry *new_dentry,
1290                            unsigned int flags)
1291 {
1292         if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) ||
1293             (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry)))))
1294                 return 0;
1295
1296         if (flags & RENAME_EXCHANGE) {
1297                 int err = call_int_hook(inode_rename, 0, new_dir, new_dentry,
1298                                                      old_dir, old_dentry);
1299                 if (err)
1300                         return err;
1301         }
1302
1303         return call_int_hook(inode_rename, 0, old_dir, old_dentry,
1304                                            new_dir, new_dentry);
1305 }
1306
1307 int security_inode_readlink(struct dentry *dentry)
1308 {
1309         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1310                 return 0;
1311         return call_int_hook(inode_readlink, 0, dentry);
1312 }
1313
1314 int security_inode_follow_link(struct dentry *dentry, struct inode *inode,
1315                                bool rcu)
1316 {
1317         if (unlikely(IS_PRIVATE(inode)))
1318                 return 0;
1319         return call_int_hook(inode_follow_link, 0, dentry, inode, rcu);
1320 }
1321
1322 int security_inode_permission(struct inode *inode, int mask)
1323 {
1324         if (unlikely(IS_PRIVATE(inode)))
1325                 return 0;
1326         return call_int_hook(inode_permission, 0, inode, mask);
1327 }
1328
1329 int security_inode_setattr(struct user_namespace *mnt_userns,
1330                            struct dentry *dentry, struct iattr *attr)
1331 {
1332         int ret;
1333
1334         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1335                 return 0;
1336         ret = call_int_hook(inode_setattr, 0, dentry, attr);
1337         if (ret)
1338                 return ret;
1339         return evm_inode_setattr(mnt_userns, dentry, attr);
1340 }
1341 EXPORT_SYMBOL_GPL(security_inode_setattr);
1342
1343 int security_inode_getattr(const struct path *path)
1344 {
1345         if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
1346                 return 0;
1347         return call_int_hook(inode_getattr, 0, path);
1348 }
1349
1350 int security_inode_setxattr(struct user_namespace *mnt_userns,
1351                             struct dentry *dentry, const char *name,
1352                             const void *value, size_t size, int flags)
1353 {
1354         int ret;
1355
1356         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1357                 return 0;
1358         /*
1359          * SELinux and Smack integrate the cap call,
1360          * so assume that all LSMs supplying this call do so.
1361          */
1362         ret = call_int_hook(inode_setxattr, 1, mnt_userns, dentry, name, value,
1363                             size, flags);
1364
1365         if (ret == 1)
1366                 ret = cap_inode_setxattr(dentry, name, value, size, flags);
1367         if (ret)
1368                 return ret;
1369         ret = ima_inode_setxattr(dentry, name, value, size);
1370         if (ret)
1371                 return ret;
1372         return evm_inode_setxattr(mnt_userns, dentry, name, value, size);
1373 }
1374
1375 void security_inode_post_setxattr(struct dentry *dentry, const char *name,
1376                                   const void *value, size_t size, int flags)
1377 {
1378         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1379                 return;
1380         call_void_hook(inode_post_setxattr, dentry, name, value, size, flags);
1381         evm_inode_post_setxattr(dentry, name, value, size);
1382 }
1383
1384 int security_inode_getxattr(struct dentry *dentry, const char *name)
1385 {
1386         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1387                 return 0;
1388         return call_int_hook(inode_getxattr, 0, dentry, name);
1389 }
1390
1391 int security_inode_listxattr(struct dentry *dentry)
1392 {
1393         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1394                 return 0;
1395         return call_int_hook(inode_listxattr, 0, dentry);
1396 }
1397
1398 int security_inode_removexattr(struct user_namespace *mnt_userns,
1399                                struct dentry *dentry, const char *name)
1400 {
1401         int ret;
1402
1403         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1404                 return 0;
1405         /*
1406          * SELinux and Smack integrate the cap call,
1407          * so assume that all LSMs supplying this call do so.
1408          */
1409         ret = call_int_hook(inode_removexattr, 1, mnt_userns, dentry, name);
1410         if (ret == 1)
1411                 ret = cap_inode_removexattr(mnt_userns, dentry, name);
1412         if (ret)
1413                 return ret;
1414         ret = ima_inode_removexattr(dentry, name);
1415         if (ret)
1416                 return ret;
1417         return evm_inode_removexattr(mnt_userns, dentry, name);
1418 }
1419
1420 int security_inode_need_killpriv(struct dentry *dentry)
1421 {
1422         return call_int_hook(inode_need_killpriv, 0, dentry);
1423 }
1424
1425 int security_inode_killpriv(struct user_namespace *mnt_userns,
1426                             struct dentry *dentry)
1427 {
1428         return call_int_hook(inode_killpriv, 0, mnt_userns, dentry);
1429 }
1430
1431 int security_inode_getsecurity(struct user_namespace *mnt_userns,
1432                                struct inode *inode, const char *name,
1433                                void **buffer, bool alloc)
1434 {
1435         struct security_hook_list *hp;
1436         int rc;
1437
1438         if (unlikely(IS_PRIVATE(inode)))
1439                 return LSM_RET_DEFAULT(inode_getsecurity);
1440         /*
1441          * Only one module will provide an attribute with a given name.
1442          */
1443         hlist_for_each_entry(hp, &security_hook_heads.inode_getsecurity, list) {
1444                 rc = hp->hook.inode_getsecurity(mnt_userns, inode, name, buffer, alloc);
1445                 if (rc != LSM_RET_DEFAULT(inode_getsecurity))
1446                         return rc;
1447         }
1448         return LSM_RET_DEFAULT(inode_getsecurity);
1449 }
1450
1451 int security_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags)
1452 {
1453         struct security_hook_list *hp;
1454         int rc;
1455
1456         if (unlikely(IS_PRIVATE(inode)))
1457                 return LSM_RET_DEFAULT(inode_setsecurity);
1458         /*
1459          * Only one module will provide an attribute with a given name.
1460          */
1461         hlist_for_each_entry(hp, &security_hook_heads.inode_setsecurity, list) {
1462                 rc = hp->hook.inode_setsecurity(inode, name, value, size,
1463                                                                 flags);
1464                 if (rc != LSM_RET_DEFAULT(inode_setsecurity))
1465                         return rc;
1466         }
1467         return LSM_RET_DEFAULT(inode_setsecurity);
1468 }
1469
1470 int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size)
1471 {
1472         if (unlikely(IS_PRIVATE(inode)))
1473                 return 0;
1474         return call_int_hook(inode_listsecurity, 0, inode, buffer, buffer_size);
1475 }
1476 EXPORT_SYMBOL(security_inode_listsecurity);
1477
1478 void security_inode_getsecid(struct inode *inode, u32 *secid)
1479 {
1480         call_void_hook(inode_getsecid, inode, secid);
1481 }
1482
1483 int security_inode_copy_up(struct dentry *src, struct cred **new)
1484 {
1485         return call_int_hook(inode_copy_up, 0, src, new);
1486 }
1487 EXPORT_SYMBOL(security_inode_copy_up);
1488
1489 int security_inode_copy_up_xattr(const char *name)
1490 {
1491         struct security_hook_list *hp;
1492         int rc;
1493
1494         /*
1495          * The implementation can return 0 (accept the xattr), 1 (discard the
1496          * xattr), -EOPNOTSUPP if it does not know anything about the xattr or
1497          * any other error code incase of an error.
1498          */
1499         hlist_for_each_entry(hp,
1500                 &security_hook_heads.inode_copy_up_xattr, list) {
1501                 rc = hp->hook.inode_copy_up_xattr(name);
1502                 if (rc != LSM_RET_DEFAULT(inode_copy_up_xattr))
1503                         return rc;
1504         }
1505
1506         return LSM_RET_DEFAULT(inode_copy_up_xattr);
1507 }
1508 EXPORT_SYMBOL(security_inode_copy_up_xattr);
1509
1510 int security_kernfs_init_security(struct kernfs_node *kn_dir,
1511                                   struct kernfs_node *kn)
1512 {
1513         return call_int_hook(kernfs_init_security, 0, kn_dir, kn);
1514 }
1515
1516 int security_file_permission(struct file *file, int mask)
1517 {
1518         int ret;
1519
1520         ret = call_int_hook(file_permission, 0, file, mask);
1521         if (ret)
1522                 return ret;
1523
1524         return fsnotify_perm(file, mask);
1525 }
1526
1527 int security_file_alloc(struct file *file)
1528 {
1529         int rc = lsm_file_alloc(file);
1530
1531         if (rc)
1532                 return rc;
1533         rc = call_int_hook(file_alloc_security, 0, file);
1534         if (unlikely(rc))
1535                 security_file_free(file);
1536         return rc;
1537 }
1538
1539 void security_file_free(struct file *file)
1540 {
1541         void *blob;
1542
1543         call_void_hook(file_free_security, file);
1544
1545         blob = file->f_security;
1546         if (blob) {
1547                 file->f_security = NULL;
1548                 kmem_cache_free(lsm_file_cache, blob);
1549         }
1550 }
1551
1552 int security_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1553 {
1554         return call_int_hook(file_ioctl, 0, file, cmd, arg);
1555 }
1556 EXPORT_SYMBOL_GPL(security_file_ioctl);
1557
1558 static inline unsigned long mmap_prot(struct file *file, unsigned long prot)
1559 {
1560         /*
1561          * Does we have PROT_READ and does the application expect
1562          * it to imply PROT_EXEC?  If not, nothing to talk about...
1563          */
1564         if ((prot & (PROT_READ | PROT_EXEC)) != PROT_READ)
1565                 return prot;
1566         if (!(current->personality & READ_IMPLIES_EXEC))
1567                 return prot;
1568         /*
1569          * if that's an anonymous mapping, let it.
1570          */
1571         if (!file)
1572                 return prot | PROT_EXEC;
1573         /*
1574          * ditto if it's not on noexec mount, except that on !MMU we need
1575          * NOMMU_MAP_EXEC (== VM_MAYEXEC) in this case
1576          */
1577         if (!path_noexec(&file->f_path)) {
1578 #ifndef CONFIG_MMU
1579                 if (file->f_op->mmap_capabilities) {
1580                         unsigned caps = file->f_op->mmap_capabilities(file);
1581                         if (!(caps & NOMMU_MAP_EXEC))
1582                                 return prot;
1583                 }
1584 #endif
1585                 return prot | PROT_EXEC;
1586         }
1587         /* anything on noexec mount won't get PROT_EXEC */
1588         return prot;
1589 }
1590
1591 int security_mmap_file(struct file *file, unsigned long prot,
1592                         unsigned long flags)
1593 {
1594         unsigned long prot_adj = mmap_prot(file, prot);
1595         int ret;
1596
1597         ret = call_int_hook(mmap_file, 0, file, prot, prot_adj, flags);
1598         if (ret)
1599                 return ret;
1600         return ima_file_mmap(file, prot, prot_adj, flags);
1601 }
1602
1603 int security_mmap_addr(unsigned long addr)
1604 {
1605         return call_int_hook(mmap_addr, 0, addr);
1606 }
1607
1608 int security_file_mprotect(struct vm_area_struct *vma, unsigned long reqprot,
1609                             unsigned long prot)
1610 {
1611         int ret;
1612
1613         ret = call_int_hook(file_mprotect, 0, vma, reqprot, prot);
1614         if (ret)
1615                 return ret;
1616         return ima_file_mprotect(vma, prot);
1617 }
1618
1619 int security_file_lock(struct file *file, unsigned int cmd)
1620 {
1621         return call_int_hook(file_lock, 0, file, cmd);
1622 }
1623
1624 int security_file_fcntl(struct file *file, unsigned int cmd, unsigned long arg)
1625 {
1626         return call_int_hook(file_fcntl, 0, file, cmd, arg);
1627 }
1628
1629 void security_file_set_fowner(struct file *file)
1630 {
1631         call_void_hook(file_set_fowner, file);
1632 }
1633
1634 int security_file_send_sigiotask(struct task_struct *tsk,
1635                                   struct fown_struct *fown, int sig)
1636 {
1637         return call_int_hook(file_send_sigiotask, 0, tsk, fown, sig);
1638 }
1639
1640 int security_file_receive(struct file *file)
1641 {
1642         return call_int_hook(file_receive, 0, file);
1643 }
1644
1645 int security_file_open(struct file *file)
1646 {
1647         int ret;
1648
1649         ret = call_int_hook(file_open, 0, file);
1650         if (ret)
1651                 return ret;
1652
1653         return fsnotify_perm(file, MAY_OPEN);
1654 }
1655
1656 int security_task_alloc(struct task_struct *task, unsigned long clone_flags)
1657 {
1658         int rc = lsm_task_alloc(task);
1659
1660         if (rc)
1661                 return rc;
1662         rc = call_int_hook(task_alloc, 0, task, clone_flags);
1663         if (unlikely(rc))
1664                 security_task_free(task);
1665         return rc;
1666 }
1667
1668 void security_task_free(struct task_struct *task)
1669 {
1670         call_void_hook(task_free, task);
1671
1672         kfree(task->security);
1673         task->security = NULL;
1674 }
1675
1676 int security_cred_alloc_blank(struct cred *cred, gfp_t gfp)
1677 {
1678         int rc = lsm_cred_alloc(cred, gfp);
1679
1680         if (rc)
1681                 return rc;
1682
1683         rc = call_int_hook(cred_alloc_blank, 0, cred, gfp);
1684         if (unlikely(rc))
1685                 security_cred_free(cred);
1686         return rc;
1687 }
1688
1689 void security_cred_free(struct cred *cred)
1690 {
1691         /*
1692          * There is a failure case in prepare_creds() that
1693          * may result in a call here with ->security being NULL.
1694          */
1695         if (unlikely(cred->security == NULL))
1696                 return;
1697
1698         call_void_hook(cred_free, cred);
1699
1700         kfree(cred->security);
1701         cred->security = NULL;
1702 }
1703
1704 int security_prepare_creds(struct cred *new, const struct cred *old, gfp_t gfp)
1705 {
1706         int rc = lsm_cred_alloc(new, gfp);
1707
1708         if (rc)
1709                 return rc;
1710
1711         rc = call_int_hook(cred_prepare, 0, new, old, gfp);
1712         if (unlikely(rc))
1713                 security_cred_free(new);
1714         return rc;
1715 }
1716
1717 void security_transfer_creds(struct cred *new, const struct cred *old)
1718 {
1719         call_void_hook(cred_transfer, new, old);
1720 }
1721
1722 void security_cred_getsecid(const struct cred *c, u32 *secid)
1723 {
1724         *secid = 0;
1725         call_void_hook(cred_getsecid, c, secid);
1726 }
1727 EXPORT_SYMBOL(security_cred_getsecid);
1728
1729 int security_kernel_act_as(struct cred *new, u32 secid)
1730 {
1731         return call_int_hook(kernel_act_as, 0, new, secid);
1732 }
1733
1734 int security_kernel_create_files_as(struct cred *new, struct inode *inode)
1735 {
1736         return call_int_hook(kernel_create_files_as, 0, new, inode);
1737 }
1738
1739 int security_kernel_module_request(char *kmod_name)
1740 {
1741         int ret;
1742
1743         ret = call_int_hook(kernel_module_request, 0, kmod_name);
1744         if (ret)
1745                 return ret;
1746         return integrity_kernel_module_request(kmod_name);
1747 }
1748
1749 int security_kernel_read_file(struct file *file, enum kernel_read_file_id id,
1750                               bool contents)
1751 {
1752         int ret;
1753
1754         ret = call_int_hook(kernel_read_file, 0, file, id, contents);
1755         if (ret)
1756                 return ret;
1757         return ima_read_file(file, id, contents);
1758 }
1759 EXPORT_SYMBOL_GPL(security_kernel_read_file);
1760
1761 int security_kernel_post_read_file(struct file *file, char *buf, loff_t size,
1762                                    enum kernel_read_file_id id)
1763 {
1764         int ret;
1765
1766         ret = call_int_hook(kernel_post_read_file, 0, file, buf, size, id);
1767         if (ret)
1768                 return ret;
1769         return ima_post_read_file(file, buf, size, id);
1770 }
1771 EXPORT_SYMBOL_GPL(security_kernel_post_read_file);
1772
1773 int security_kernel_load_data(enum kernel_load_data_id id, bool contents)
1774 {
1775         int ret;
1776
1777         ret = call_int_hook(kernel_load_data, 0, id, contents);
1778         if (ret)
1779                 return ret;
1780         return ima_load_data(id, contents);
1781 }
1782 EXPORT_SYMBOL_GPL(security_kernel_load_data);
1783
1784 int security_kernel_post_load_data(char *buf, loff_t size,
1785                                    enum kernel_load_data_id id,
1786                                    char *description)
1787 {
1788         int ret;
1789
1790         ret = call_int_hook(kernel_post_load_data, 0, buf, size, id,
1791                             description);
1792         if (ret)
1793                 return ret;
1794         return ima_post_load_data(buf, size, id, description);
1795 }
1796 EXPORT_SYMBOL_GPL(security_kernel_post_load_data);
1797
1798 int security_task_fix_setuid(struct cred *new, const struct cred *old,
1799                              int flags)
1800 {
1801         return call_int_hook(task_fix_setuid, 0, new, old, flags);
1802 }
1803
1804 int security_task_fix_setgid(struct cred *new, const struct cred *old,
1805                                  int flags)
1806 {
1807         return call_int_hook(task_fix_setgid, 0, new, old, flags);
1808 }
1809
1810 int security_task_fix_setgroups(struct cred *new, const struct cred *old)
1811 {
1812         return call_int_hook(task_fix_setgroups, 0, new, old);
1813 }
1814
1815 int security_task_setpgid(struct task_struct *p, pid_t pgid)
1816 {
1817         return call_int_hook(task_setpgid, 0, p, pgid);
1818 }
1819
1820 int security_task_getpgid(struct task_struct *p)
1821 {
1822         return call_int_hook(task_getpgid, 0, p);
1823 }
1824
1825 int security_task_getsid(struct task_struct *p)
1826 {
1827         return call_int_hook(task_getsid, 0, p);
1828 }
1829
1830 void security_current_getsecid_subj(u32 *secid)
1831 {
1832         *secid = 0;
1833         call_void_hook(current_getsecid_subj, secid);
1834 }
1835 EXPORT_SYMBOL(security_current_getsecid_subj);
1836
1837 void security_task_getsecid_obj(struct task_struct *p, u32 *secid)
1838 {
1839         *secid = 0;
1840         call_void_hook(task_getsecid_obj, p, secid);
1841 }
1842 EXPORT_SYMBOL(security_task_getsecid_obj);
1843
1844 int security_task_setnice(struct task_struct *p, int nice)
1845 {
1846         return call_int_hook(task_setnice, 0, p, nice);
1847 }
1848
1849 int security_task_setioprio(struct task_struct *p, int ioprio)
1850 {
1851         return call_int_hook(task_setioprio, 0, p, ioprio);
1852 }
1853
1854 int security_task_getioprio(struct task_struct *p)
1855 {
1856         return call_int_hook(task_getioprio, 0, p);
1857 }
1858
1859 int security_task_prlimit(const struct cred *cred, const struct cred *tcred,
1860                           unsigned int flags)
1861 {
1862         return call_int_hook(task_prlimit, 0, cred, tcred, flags);
1863 }
1864
1865 int security_task_setrlimit(struct task_struct *p, unsigned int resource,
1866                 struct rlimit *new_rlim)
1867 {
1868         return call_int_hook(task_setrlimit, 0, p, resource, new_rlim);
1869 }
1870
1871 int security_task_setscheduler(struct task_struct *p)
1872 {
1873         return call_int_hook(task_setscheduler, 0, p);
1874 }
1875
1876 int security_task_getscheduler(struct task_struct *p)
1877 {
1878         return call_int_hook(task_getscheduler, 0, p);
1879 }
1880
1881 int security_task_movememory(struct task_struct *p)
1882 {
1883         return call_int_hook(task_movememory, 0, p);
1884 }
1885
1886 int security_task_kill(struct task_struct *p, struct kernel_siginfo *info,
1887                         int sig, const struct cred *cred)
1888 {
1889         return call_int_hook(task_kill, 0, p, info, sig, cred);
1890 }
1891
1892 int security_task_prctl(int option, unsigned long arg2, unsigned long arg3,
1893                          unsigned long arg4, unsigned long arg5)
1894 {
1895         int thisrc;
1896         int rc = LSM_RET_DEFAULT(task_prctl);
1897         struct security_hook_list *hp;
1898
1899         hlist_for_each_entry(hp, &security_hook_heads.task_prctl, list) {
1900                 thisrc = hp->hook.task_prctl(option, arg2, arg3, arg4, arg5);
1901                 if (thisrc != LSM_RET_DEFAULT(task_prctl)) {
1902                         rc = thisrc;
1903                         if (thisrc != 0)
1904                                 break;
1905                 }
1906         }
1907         return rc;
1908 }
1909
1910 void security_task_to_inode(struct task_struct *p, struct inode *inode)
1911 {
1912         call_void_hook(task_to_inode, p, inode);
1913 }
1914
1915 int security_create_user_ns(const struct cred *cred)
1916 {
1917         return call_int_hook(userns_create, 0, cred);
1918 }
1919
1920 int security_ipc_permission(struct kern_ipc_perm *ipcp, short flag)
1921 {
1922         return call_int_hook(ipc_permission, 0, ipcp, flag);
1923 }
1924
1925 void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid)
1926 {
1927         *secid = 0;
1928         call_void_hook(ipc_getsecid, ipcp, secid);
1929 }
1930
1931 int security_msg_msg_alloc(struct msg_msg *msg)
1932 {
1933         int rc = lsm_msg_msg_alloc(msg);
1934
1935         if (unlikely(rc))
1936                 return rc;
1937         rc = call_int_hook(msg_msg_alloc_security, 0, msg);
1938         if (unlikely(rc))
1939                 security_msg_msg_free(msg);
1940         return rc;
1941 }
1942
1943 void security_msg_msg_free(struct msg_msg *msg)
1944 {
1945         call_void_hook(msg_msg_free_security, msg);
1946         kfree(msg->security);
1947         msg->security = NULL;
1948 }
1949
1950 int security_msg_queue_alloc(struct kern_ipc_perm *msq)
1951 {
1952         int rc = lsm_ipc_alloc(msq);
1953
1954         if (unlikely(rc))
1955                 return rc;
1956         rc = call_int_hook(msg_queue_alloc_security, 0, msq);
1957         if (unlikely(rc))
1958                 security_msg_queue_free(msq);
1959         return rc;
1960 }
1961
1962 void security_msg_queue_free(struct kern_ipc_perm *msq)
1963 {
1964         call_void_hook(msg_queue_free_security, msq);
1965         kfree(msq->security);
1966         msq->security = NULL;
1967 }
1968
1969 int security_msg_queue_associate(struct kern_ipc_perm *msq, int msqflg)
1970 {
1971         return call_int_hook(msg_queue_associate, 0, msq, msqflg);
1972 }
1973
1974 int security_msg_queue_msgctl(struct kern_ipc_perm *msq, int cmd)
1975 {
1976         return call_int_hook(msg_queue_msgctl, 0, msq, cmd);
1977 }
1978
1979 int security_msg_queue_msgsnd(struct kern_ipc_perm *msq,
1980                                struct msg_msg *msg, int msqflg)
1981 {
1982         return call_int_hook(msg_queue_msgsnd, 0, msq, msg, msqflg);
1983 }
1984
1985 int security_msg_queue_msgrcv(struct kern_ipc_perm *msq, struct msg_msg *msg,
1986                                struct task_struct *target, long type, int mode)
1987 {
1988         return call_int_hook(msg_queue_msgrcv, 0, msq, msg, target, type, mode);
1989 }
1990
1991 int security_shm_alloc(struct kern_ipc_perm *shp)
1992 {
1993         int rc = lsm_ipc_alloc(shp);
1994
1995         if (unlikely(rc))
1996                 return rc;
1997         rc = call_int_hook(shm_alloc_security, 0, shp);
1998         if (unlikely(rc))
1999                 security_shm_free(shp);
2000         return rc;
2001 }
2002
2003 void security_shm_free(struct kern_ipc_perm *shp)
2004 {
2005         call_void_hook(shm_free_security, shp);
2006         kfree(shp->security);
2007         shp->security = NULL;
2008 }
2009
2010 int security_shm_associate(struct kern_ipc_perm *shp, int shmflg)
2011 {
2012         return call_int_hook(shm_associate, 0, shp, shmflg);
2013 }
2014
2015 int security_shm_shmctl(struct kern_ipc_perm *shp, int cmd)
2016 {
2017         return call_int_hook(shm_shmctl, 0, shp, cmd);
2018 }
2019
2020 int security_shm_shmat(struct kern_ipc_perm *shp, char __user *shmaddr, int shmflg)
2021 {
2022         return call_int_hook(shm_shmat, 0, shp, shmaddr, shmflg);
2023 }
2024
2025 int security_sem_alloc(struct kern_ipc_perm *sma)
2026 {
2027         int rc = lsm_ipc_alloc(sma);
2028
2029         if (unlikely(rc))
2030                 return rc;
2031         rc = call_int_hook(sem_alloc_security, 0, sma);
2032         if (unlikely(rc))
2033                 security_sem_free(sma);
2034         return rc;
2035 }
2036
2037 void security_sem_free(struct kern_ipc_perm *sma)
2038 {
2039         call_void_hook(sem_free_security, sma);
2040         kfree(sma->security);
2041         sma->security = NULL;
2042 }
2043
2044 int security_sem_associate(struct kern_ipc_perm *sma, int semflg)
2045 {
2046         return call_int_hook(sem_associate, 0, sma, semflg);
2047 }
2048
2049 int security_sem_semctl(struct kern_ipc_perm *sma, int cmd)
2050 {
2051         return call_int_hook(sem_semctl, 0, sma, cmd);
2052 }
2053
2054 int security_sem_semop(struct kern_ipc_perm *sma, struct sembuf *sops,
2055                         unsigned nsops, int alter)
2056 {
2057         return call_int_hook(sem_semop, 0, sma, sops, nsops, alter);
2058 }
2059
2060 void security_d_instantiate(struct dentry *dentry, struct inode *inode)
2061 {
2062         if (unlikely(inode && IS_PRIVATE(inode)))
2063                 return;
2064         call_void_hook(d_instantiate, dentry, inode);
2065 }
2066 EXPORT_SYMBOL(security_d_instantiate);
2067
2068 int security_getprocattr(struct task_struct *p, const char *lsm,
2069                          const char *name, char **value)
2070 {
2071         struct security_hook_list *hp;
2072
2073         hlist_for_each_entry(hp, &security_hook_heads.getprocattr, list) {
2074                 if (lsm != NULL && strcmp(lsm, hp->lsm))
2075                         continue;
2076                 return hp->hook.getprocattr(p, name, value);
2077         }
2078         return LSM_RET_DEFAULT(getprocattr);
2079 }
2080
2081 int security_setprocattr(const char *lsm, const char *name, void *value,
2082                          size_t size)
2083 {
2084         struct security_hook_list *hp;
2085
2086         hlist_for_each_entry(hp, &security_hook_heads.setprocattr, list) {
2087                 if (lsm != NULL && strcmp(lsm, hp->lsm))
2088                         continue;
2089                 return hp->hook.setprocattr(name, value, size);
2090         }
2091         return LSM_RET_DEFAULT(setprocattr);
2092 }
2093
2094 int security_netlink_send(struct sock *sk, struct sk_buff *skb)
2095 {
2096         return call_int_hook(netlink_send, 0, sk, skb);
2097 }
2098
2099 int security_ismaclabel(const char *name)
2100 {
2101         return call_int_hook(ismaclabel, 0, name);
2102 }
2103 EXPORT_SYMBOL(security_ismaclabel);
2104
2105 int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
2106 {
2107         struct security_hook_list *hp;
2108         int rc;
2109
2110         /*
2111          * Currently, only one LSM can implement secid_to_secctx (i.e this
2112          * LSM hook is not "stackable").
2113          */
2114         hlist_for_each_entry(hp, &security_hook_heads.secid_to_secctx, list) {
2115                 rc = hp->hook.secid_to_secctx(secid, secdata, seclen);
2116                 if (rc != LSM_RET_DEFAULT(secid_to_secctx))
2117                         return rc;
2118         }
2119
2120         return LSM_RET_DEFAULT(secid_to_secctx);
2121 }
2122 EXPORT_SYMBOL(security_secid_to_secctx);
2123
2124 int security_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid)
2125 {
2126         *secid = 0;
2127         return call_int_hook(secctx_to_secid, 0, secdata, seclen, secid);
2128 }
2129 EXPORT_SYMBOL(security_secctx_to_secid);
2130
2131 void security_release_secctx(char *secdata, u32 seclen)
2132 {
2133         call_void_hook(release_secctx, secdata, seclen);
2134 }
2135 EXPORT_SYMBOL(security_release_secctx);
2136
2137 void security_inode_invalidate_secctx(struct inode *inode)
2138 {
2139         call_void_hook(inode_invalidate_secctx, inode);
2140 }
2141 EXPORT_SYMBOL(security_inode_invalidate_secctx);
2142
2143 int security_inode_notifysecctx(struct inode *inode, void *ctx, u32 ctxlen)
2144 {
2145         return call_int_hook(inode_notifysecctx, 0, inode, ctx, ctxlen);
2146 }
2147 EXPORT_SYMBOL(security_inode_notifysecctx);
2148
2149 int security_inode_setsecctx(struct dentry *dentry, void *ctx, u32 ctxlen)
2150 {
2151         return call_int_hook(inode_setsecctx, 0, dentry, ctx, ctxlen);
2152 }
2153 EXPORT_SYMBOL(security_inode_setsecctx);
2154
2155 int security_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen)
2156 {
2157         return call_int_hook(inode_getsecctx, -EOPNOTSUPP, inode, ctx, ctxlen);
2158 }
2159 EXPORT_SYMBOL(security_inode_getsecctx);
2160
2161 #ifdef CONFIG_WATCH_QUEUE
2162 int security_post_notification(const struct cred *w_cred,
2163                                const struct cred *cred,
2164                                struct watch_notification *n)
2165 {
2166         return call_int_hook(post_notification, 0, w_cred, cred, n);
2167 }
2168 #endif /* CONFIG_WATCH_QUEUE */
2169
2170 #ifdef CONFIG_KEY_NOTIFICATIONS
2171 int security_watch_key(struct key *key)
2172 {
2173         return call_int_hook(watch_key, 0, key);
2174 }
2175 #endif
2176
2177 #ifdef CONFIG_SECURITY_NETWORK
2178
2179 int security_unix_stream_connect(struct sock *sock, struct sock *other, struct sock *newsk)
2180 {
2181         return call_int_hook(unix_stream_connect, 0, sock, other, newsk);
2182 }
2183 EXPORT_SYMBOL(security_unix_stream_connect);
2184
2185 int security_unix_may_send(struct socket *sock,  struct socket *other)
2186 {
2187         return call_int_hook(unix_may_send, 0, sock, other);
2188 }
2189 EXPORT_SYMBOL(security_unix_may_send);
2190
2191 int security_socket_create(int family, int type, int protocol, int kern)
2192 {
2193         return call_int_hook(socket_create, 0, family, type, protocol, kern);
2194 }
2195
2196 int security_socket_post_create(struct socket *sock, int family,
2197                                 int type, int protocol, int kern)
2198 {
2199         return call_int_hook(socket_post_create, 0, sock, family, type,
2200                                                 protocol, kern);
2201 }
2202
2203 int security_socket_socketpair(struct socket *socka, struct socket *sockb)
2204 {
2205         return call_int_hook(socket_socketpair, 0, socka, sockb);
2206 }
2207 EXPORT_SYMBOL(security_socket_socketpair);
2208
2209 int security_socket_bind(struct socket *sock, struct sockaddr *address, int addrlen)
2210 {
2211         return call_int_hook(socket_bind, 0, sock, address, addrlen);
2212 }
2213
2214 int security_socket_connect(struct socket *sock, struct sockaddr *address, int addrlen)
2215 {
2216         return call_int_hook(socket_connect, 0, sock, address, addrlen);
2217 }
2218
2219 int security_socket_listen(struct socket *sock, int backlog)
2220 {
2221         return call_int_hook(socket_listen, 0, sock, backlog);
2222 }
2223
2224 int security_socket_accept(struct socket *sock, struct socket *newsock)
2225 {
2226         return call_int_hook(socket_accept, 0, sock, newsock);
2227 }
2228
2229 int security_socket_sendmsg(struct socket *sock, struct msghdr *msg, int size)
2230 {
2231         return call_int_hook(socket_sendmsg, 0, sock, msg, size);
2232 }
2233
2234 int security_socket_recvmsg(struct socket *sock, struct msghdr *msg,
2235                             int size, int flags)
2236 {
2237         return call_int_hook(socket_recvmsg, 0, sock, msg, size, flags);
2238 }
2239
2240 int security_socket_getsockname(struct socket *sock)
2241 {
2242         return call_int_hook(socket_getsockname, 0, sock);
2243 }
2244
2245 int security_socket_getpeername(struct socket *sock)
2246 {
2247         return call_int_hook(socket_getpeername, 0, sock);
2248 }
2249
2250 int security_socket_getsockopt(struct socket *sock, int level, int optname)
2251 {
2252         return call_int_hook(socket_getsockopt, 0, sock, level, optname);
2253 }
2254
2255 int security_socket_setsockopt(struct socket *sock, int level, int optname)
2256 {
2257         return call_int_hook(socket_setsockopt, 0, sock, level, optname);
2258 }
2259
2260 int security_socket_shutdown(struct socket *sock, int how)
2261 {
2262         return call_int_hook(socket_shutdown, 0, sock, how);
2263 }
2264
2265 int security_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
2266 {
2267         return call_int_hook(socket_sock_rcv_skb, 0, sk, skb);
2268 }
2269 EXPORT_SYMBOL(security_sock_rcv_skb);
2270
2271 int security_socket_getpeersec_stream(struct socket *sock, char __user *optval,
2272                                       int __user *optlen, unsigned len)
2273 {
2274         return call_int_hook(socket_getpeersec_stream, -ENOPROTOOPT, sock,
2275                                 optval, optlen, len);
2276 }
2277
2278 int security_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb, u32 *secid)
2279 {
2280         return call_int_hook(socket_getpeersec_dgram, -ENOPROTOOPT, sock,
2281                              skb, secid);
2282 }
2283 EXPORT_SYMBOL(security_socket_getpeersec_dgram);
2284
2285 int security_sk_alloc(struct sock *sk, int family, gfp_t priority)
2286 {
2287         return call_int_hook(sk_alloc_security, 0, sk, family, priority);
2288 }
2289
2290 void security_sk_free(struct sock *sk)
2291 {
2292         call_void_hook(sk_free_security, sk);
2293 }
2294
2295 void security_sk_clone(const struct sock *sk, struct sock *newsk)
2296 {
2297         call_void_hook(sk_clone_security, sk, newsk);
2298 }
2299 EXPORT_SYMBOL(security_sk_clone);
2300
2301 void security_sk_classify_flow(struct sock *sk, struct flowi_common *flic)
2302 {
2303         call_void_hook(sk_getsecid, sk, &flic->flowic_secid);
2304 }
2305 EXPORT_SYMBOL(security_sk_classify_flow);
2306
2307 void security_req_classify_flow(const struct request_sock *req,
2308                                 struct flowi_common *flic)
2309 {
2310         call_void_hook(req_classify_flow, req, flic);
2311 }
2312 EXPORT_SYMBOL(security_req_classify_flow);
2313
2314 void security_sock_graft(struct sock *sk, struct socket *parent)
2315 {
2316         call_void_hook(sock_graft, sk, parent);
2317 }
2318 EXPORT_SYMBOL(security_sock_graft);
2319
2320 int security_inet_conn_request(const struct sock *sk,
2321                         struct sk_buff *skb, struct request_sock *req)
2322 {
2323         return call_int_hook(inet_conn_request, 0, sk, skb, req);
2324 }
2325 EXPORT_SYMBOL(security_inet_conn_request);
2326
2327 void security_inet_csk_clone(struct sock *newsk,
2328                         const struct request_sock *req)
2329 {
2330         call_void_hook(inet_csk_clone, newsk, req);
2331 }
2332
2333 void security_inet_conn_established(struct sock *sk,
2334                         struct sk_buff *skb)
2335 {
2336         call_void_hook(inet_conn_established, sk, skb);
2337 }
2338 EXPORT_SYMBOL(security_inet_conn_established);
2339
2340 int security_secmark_relabel_packet(u32 secid)
2341 {
2342         return call_int_hook(secmark_relabel_packet, 0, secid);
2343 }
2344 EXPORT_SYMBOL(security_secmark_relabel_packet);
2345
2346 void security_secmark_refcount_inc(void)
2347 {
2348         call_void_hook(secmark_refcount_inc);
2349 }
2350 EXPORT_SYMBOL(security_secmark_refcount_inc);
2351
2352 void security_secmark_refcount_dec(void)
2353 {
2354         call_void_hook(secmark_refcount_dec);
2355 }
2356 EXPORT_SYMBOL(security_secmark_refcount_dec);
2357
2358 int security_tun_dev_alloc_security(void **security)
2359 {
2360         return call_int_hook(tun_dev_alloc_security, 0, security);
2361 }
2362 EXPORT_SYMBOL(security_tun_dev_alloc_security);
2363
2364 void security_tun_dev_free_security(void *security)
2365 {
2366         call_void_hook(tun_dev_free_security, security);
2367 }
2368 EXPORT_SYMBOL(security_tun_dev_free_security);
2369
2370 int security_tun_dev_create(void)
2371 {
2372         return call_int_hook(tun_dev_create, 0);
2373 }
2374 EXPORT_SYMBOL(security_tun_dev_create);
2375
2376 int security_tun_dev_attach_queue(void *security)
2377 {
2378         return call_int_hook(tun_dev_attach_queue, 0, security);
2379 }
2380 EXPORT_SYMBOL(security_tun_dev_attach_queue);
2381
2382 int security_tun_dev_attach(struct sock *sk, void *security)
2383 {
2384         return call_int_hook(tun_dev_attach, 0, sk, security);
2385 }
2386 EXPORT_SYMBOL(security_tun_dev_attach);
2387
2388 int security_tun_dev_open(void *security)
2389 {
2390         return call_int_hook(tun_dev_open, 0, security);
2391 }
2392 EXPORT_SYMBOL(security_tun_dev_open);
2393
2394 int security_sctp_assoc_request(struct sctp_association *asoc, struct sk_buff *skb)
2395 {
2396         return call_int_hook(sctp_assoc_request, 0, asoc, skb);
2397 }
2398 EXPORT_SYMBOL(security_sctp_assoc_request);
2399
2400 int security_sctp_bind_connect(struct sock *sk, int optname,
2401                                struct sockaddr *address, int addrlen)
2402 {
2403         return call_int_hook(sctp_bind_connect, 0, sk, optname,
2404                              address, addrlen);
2405 }
2406 EXPORT_SYMBOL(security_sctp_bind_connect);
2407
2408 void security_sctp_sk_clone(struct sctp_association *asoc, struct sock *sk,
2409                             struct sock *newsk)
2410 {
2411         call_void_hook(sctp_sk_clone, asoc, sk, newsk);
2412 }
2413 EXPORT_SYMBOL(security_sctp_sk_clone);
2414
2415 int security_sctp_assoc_established(struct sctp_association *asoc,
2416                                     struct sk_buff *skb)
2417 {
2418         return call_int_hook(sctp_assoc_established, 0, asoc, skb);
2419 }
2420 EXPORT_SYMBOL(security_sctp_assoc_established);
2421
2422 #endif  /* CONFIG_SECURITY_NETWORK */
2423
2424 #ifdef CONFIG_SECURITY_INFINIBAND
2425
2426 int security_ib_pkey_access(void *sec, u64 subnet_prefix, u16 pkey)
2427 {
2428         return call_int_hook(ib_pkey_access, 0, sec, subnet_prefix, pkey);
2429 }
2430 EXPORT_SYMBOL(security_ib_pkey_access);
2431
2432 int security_ib_endport_manage_subnet(void *sec, const char *dev_name, u8 port_num)
2433 {
2434         return call_int_hook(ib_endport_manage_subnet, 0, sec, dev_name, port_num);
2435 }
2436 EXPORT_SYMBOL(security_ib_endport_manage_subnet);
2437
2438 int security_ib_alloc_security(void **sec)
2439 {
2440         return call_int_hook(ib_alloc_security, 0, sec);
2441 }
2442 EXPORT_SYMBOL(security_ib_alloc_security);
2443
2444 void security_ib_free_security(void *sec)
2445 {
2446         call_void_hook(ib_free_security, sec);
2447 }
2448 EXPORT_SYMBOL(security_ib_free_security);
2449 #endif  /* CONFIG_SECURITY_INFINIBAND */
2450
2451 #ifdef CONFIG_SECURITY_NETWORK_XFRM
2452
2453 int security_xfrm_policy_alloc(struct xfrm_sec_ctx **ctxp,
2454                                struct xfrm_user_sec_ctx *sec_ctx,
2455                                gfp_t gfp)
2456 {
2457         return call_int_hook(xfrm_policy_alloc_security, 0, ctxp, sec_ctx, gfp);
2458 }
2459 EXPORT_SYMBOL(security_xfrm_policy_alloc);
2460
2461 int security_xfrm_policy_clone(struct xfrm_sec_ctx *old_ctx,
2462                               struct xfrm_sec_ctx **new_ctxp)
2463 {
2464         return call_int_hook(xfrm_policy_clone_security, 0, old_ctx, new_ctxp);
2465 }
2466
2467 void security_xfrm_policy_free(struct xfrm_sec_ctx *ctx)
2468 {
2469         call_void_hook(xfrm_policy_free_security, ctx);
2470 }
2471 EXPORT_SYMBOL(security_xfrm_policy_free);
2472
2473 int security_xfrm_policy_delete(struct xfrm_sec_ctx *ctx)
2474 {
2475         return call_int_hook(xfrm_policy_delete_security, 0, ctx);
2476 }
2477
2478 int security_xfrm_state_alloc(struct xfrm_state *x,
2479                               struct xfrm_user_sec_ctx *sec_ctx)
2480 {
2481         return call_int_hook(xfrm_state_alloc, 0, x, sec_ctx);
2482 }
2483 EXPORT_SYMBOL(security_xfrm_state_alloc);
2484
2485 int security_xfrm_state_alloc_acquire(struct xfrm_state *x,
2486                                       struct xfrm_sec_ctx *polsec, u32 secid)
2487 {
2488         return call_int_hook(xfrm_state_alloc_acquire, 0, x, polsec, secid);
2489 }
2490
2491 int security_xfrm_state_delete(struct xfrm_state *x)
2492 {
2493         return call_int_hook(xfrm_state_delete_security, 0, x);
2494 }
2495 EXPORT_SYMBOL(security_xfrm_state_delete);
2496
2497 void security_xfrm_state_free(struct xfrm_state *x)
2498 {
2499         call_void_hook(xfrm_state_free_security, x);
2500 }
2501
2502 int security_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid)
2503 {
2504         return call_int_hook(xfrm_policy_lookup, 0, ctx, fl_secid);
2505 }
2506
2507 int security_xfrm_state_pol_flow_match(struct xfrm_state *x,
2508                                        struct xfrm_policy *xp,
2509                                        const struct flowi_common *flic)
2510 {
2511         struct security_hook_list *hp;
2512         int rc = LSM_RET_DEFAULT(xfrm_state_pol_flow_match);
2513
2514         /*
2515          * Since this function is expected to return 0 or 1, the judgment
2516          * becomes difficult if multiple LSMs supply this call. Fortunately,
2517          * we can use the first LSM's judgment because currently only SELinux
2518          * supplies this call.
2519          *
2520          * For speed optimization, we explicitly break the loop rather than
2521          * using the macro
2522          */
2523         hlist_for_each_entry(hp, &security_hook_heads.xfrm_state_pol_flow_match,
2524                                 list) {
2525                 rc = hp->hook.xfrm_state_pol_flow_match(x, xp, flic);
2526                 break;
2527         }
2528         return rc;
2529 }
2530
2531 int security_xfrm_decode_session(struct sk_buff *skb, u32 *secid)
2532 {
2533         return call_int_hook(xfrm_decode_session, 0, skb, secid, 1);
2534 }
2535
2536 void security_skb_classify_flow(struct sk_buff *skb, struct flowi_common *flic)
2537 {
2538         int rc = call_int_hook(xfrm_decode_session, 0, skb, &flic->flowic_secid,
2539                                 0);
2540
2541         BUG_ON(rc);
2542 }
2543 EXPORT_SYMBOL(security_skb_classify_flow);
2544
2545 #endif  /* CONFIG_SECURITY_NETWORK_XFRM */
2546
2547 #ifdef CONFIG_KEYS
2548
2549 int security_key_alloc(struct key *key, const struct cred *cred,
2550                        unsigned long flags)
2551 {
2552         return call_int_hook(key_alloc, 0, key, cred, flags);
2553 }
2554
2555 void security_key_free(struct key *key)
2556 {
2557         call_void_hook(key_free, key);
2558 }
2559
2560 int security_key_permission(key_ref_t key_ref, const struct cred *cred,
2561                             enum key_need_perm need_perm)
2562 {
2563         return call_int_hook(key_permission, 0, key_ref, cred, need_perm);
2564 }
2565
2566 int security_key_getsecurity(struct key *key, char **_buffer)
2567 {
2568         *_buffer = NULL;
2569         return call_int_hook(key_getsecurity, 0, key, _buffer);
2570 }
2571
2572 #endif  /* CONFIG_KEYS */
2573
2574 #ifdef CONFIG_AUDIT
2575
2576 int security_audit_rule_init(u32 field, u32 op, char *rulestr, void **lsmrule)
2577 {
2578         return call_int_hook(audit_rule_init, 0, field, op, rulestr, lsmrule);
2579 }
2580
2581 int security_audit_rule_known(struct audit_krule *krule)
2582 {
2583         return call_int_hook(audit_rule_known, 0, krule);
2584 }
2585
2586 void security_audit_rule_free(void *lsmrule)
2587 {
2588         call_void_hook(audit_rule_free, lsmrule);
2589 }
2590
2591 int security_audit_rule_match(u32 secid, u32 field, u32 op, void *lsmrule)
2592 {
2593         return call_int_hook(audit_rule_match, 0, secid, field, op, lsmrule);
2594 }
2595 #endif /* CONFIG_AUDIT */
2596
2597 #ifdef CONFIG_BPF_SYSCALL
2598 int security_bpf(int cmd, union bpf_attr *attr, unsigned int size)
2599 {
2600         return call_int_hook(bpf, 0, cmd, attr, size);
2601 }
2602 int security_bpf_map(struct bpf_map *map, fmode_t fmode)
2603 {
2604         return call_int_hook(bpf_map, 0, map, fmode);
2605 }
2606 int security_bpf_prog(struct bpf_prog *prog)
2607 {
2608         return call_int_hook(bpf_prog, 0, prog);
2609 }
2610 int security_bpf_map_alloc(struct bpf_map *map)
2611 {
2612         return call_int_hook(bpf_map_alloc_security, 0, map);
2613 }
2614 int security_bpf_prog_alloc(struct bpf_prog_aux *aux)
2615 {
2616         return call_int_hook(bpf_prog_alloc_security, 0, aux);
2617 }
2618 void security_bpf_map_free(struct bpf_map *map)
2619 {
2620         call_void_hook(bpf_map_free_security, map);
2621 }
2622 void security_bpf_prog_free(struct bpf_prog_aux *aux)
2623 {
2624         call_void_hook(bpf_prog_free_security, aux);
2625 }
2626 #endif /* CONFIG_BPF_SYSCALL */
2627
2628 int security_locked_down(enum lockdown_reason what)
2629 {
2630         return call_int_hook(locked_down, 0, what);
2631 }
2632 EXPORT_SYMBOL(security_locked_down);
2633
2634 #ifdef CONFIG_PERF_EVENTS
2635 int security_perf_event_open(struct perf_event_attr *attr, int type)
2636 {
2637         return call_int_hook(perf_event_open, 0, attr, type);
2638 }
2639
2640 int security_perf_event_alloc(struct perf_event *event)
2641 {
2642         return call_int_hook(perf_event_alloc, 0, event);
2643 }
2644
2645 void security_perf_event_free(struct perf_event *event)
2646 {
2647         call_void_hook(perf_event_free, event);
2648 }
2649
2650 int security_perf_event_read(struct perf_event *event)
2651 {
2652         return call_int_hook(perf_event_read, 0, event);
2653 }
2654
2655 int security_perf_event_write(struct perf_event *event)
2656 {
2657         return call_int_hook(perf_event_write, 0, event);
2658 }
2659 #endif /* CONFIG_PERF_EVENTS */
2660
2661 #ifdef CONFIG_IO_URING
2662 int security_uring_override_creds(const struct cred *new)
2663 {
2664         return call_int_hook(uring_override_creds, 0, new);
2665 }
2666
2667 int security_uring_sqpoll(void)
2668 {
2669         return call_int_hook(uring_sqpoll, 0);
2670 }
2671 int security_uring_cmd(struct io_uring_cmd *ioucmd)
2672 {
2673         return call_int_hook(uring_cmd, 0, ioucmd);
2674 }
2675 #endif /* CONFIG_IO_URING */