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/lsm_hooks.h>
  20 #include <linux/integrity.h>
  21 #include <linux/ima.h>
  22 #include <linux/evm.h>
  23 #include <linux/fsnotify.h>
  24 #include <linux/mman.h>
  25 #include <linux/mount.h>
  26 #include <linux/personality.h>
  27 #include <linux/backing-dev.h>
  28 #include <linux/string.h>
  29 #include <linux/msg.h>
  30 #include <net/flow.h>
  31
  32 #define MAX_LSM_EVM_XATTR       2
  33
  34 /* How many LSMs were built into the kernel? */
  35 #define LSM_COUNT (__end_lsm_info - __start_lsm_info)
  36
  37 struct security_hook_heads security_hook_heads __lsm_ro_after_init;
  38 static BLOCKING_NOTIFIER_HEAD(blocking_lsm_notifier_chain);
  39
  40 static struct kmem_cache *lsm_file_cache;
  41 static struct kmem_cache *lsm_inode_cache;
  42
  43 char *lsm_names;
  44 static struct lsm_blob_sizes blob_sizes __lsm_ro_after_init;
  45
  46 /* Boot-time LSM user choice */
  47 static __initdata const char *chosen_lsm_order;
  48 static __initdata const char *chosen_major_lsm;
  49
  50 static __initconst const char * const builtin_lsm_order = CONFIG_LSM;
  51
  52 /* Ordered list of LSMs to initialize. */
  53 static __initdata struct lsm_info **ordered_lsms;
  54 static __initdata struct lsm_info *exclusive;
  55
  56 static __initdata bool debug;
  57 #define init_debug(...)                                         \
  58         do {                                                    \
  59                 if (debug)                                      \
  60                         pr_info(__VA_ARGS__);                   \
  61         } while (0)
  62
  63 static bool __init is_enabled(struct lsm_info *lsm)
  64 {
  65         if (!lsm->enabled)
  66                 return false;
  67
  68         return *lsm->enabled;
  69 }
  70
  71 /* Mark an LSM's enabled flag. */
  72 static int lsm_enabled_true __initdata = 1;
  73 static int lsm_enabled_false __initdata = 0;
  74 static void __init set_enabled(struct lsm_info *lsm, bool enabled)
  75 {
  76         /*
  77          * When an LSM hasn't configured an enable variable, we can use
  78          * a hard-coded location for storing the default enabled state.
  79          */
  80         if (!lsm->enabled) {
  81                 if (enabled)
  82                         lsm->enabled = &lsm_enabled_true;
  83                 else
  84                         lsm->enabled = &lsm_enabled_false;
  85         } else if (lsm->enabled == &lsm_enabled_true) {
  86                 if (!enabled)
  87                         lsm->enabled = &lsm_enabled_false;
  88         } else if (lsm->enabled == &lsm_enabled_false) {
  89                 if (enabled)
  90                         lsm->enabled = &lsm_enabled_true;
  91         } else {
  92                 *lsm->enabled = enabled;
  93         }
  94 }
  95
  96 /* Is an LSM already listed in the ordered LSMs list? */
  97 static bool __init exists_ordered_lsm(struct lsm_info *lsm)
  98 {
  99         struct lsm_info **check;
 100
 101         for (check = ordered_lsms; *check; check++)
 102                 if (*check == lsm)
 103                         return true;
 104
 105         return false;
 106 }
 107
 108 /* Append an LSM to the list of ordered LSMs to initialize. */
 109 static int last_lsm __initdata;
 110 static void __init append_ordered_lsm(struct lsm_info *lsm, const char *from)
 111 {
 112         /* Ignore duplicate selections. */
 113         if (exists_ordered_lsm(lsm))
 114                 return;
 115
 116         if (WARN(last_lsm == LSM_COUNT, "%s: out of LSM slots!?\n", from))
 117                 return;
 118
 119         /* Enable this LSM, if it is not already set. */
 120         if (!lsm->enabled)
 121                 lsm->enabled = &lsm_enabled_true;
 122         ordered_lsms[last_lsm++] = lsm;
 123
 124         init_debug("%s ordering: %s (%sabled)\n", from, lsm->name,
 125                    is_enabled(lsm) ? "en" : "dis");
 126 }
 127
 128 /* Is an LSM allowed to be initialized? */
 129 static bool __init lsm_allowed(struct lsm_info *lsm)
 130 {
 131         /* Skip if the LSM is disabled. */
 132         if (!is_enabled(lsm))
 133                 return false;
 134
 135         /* Not allowed if another exclusive LSM already initialized. */
 136         if ((lsm->flags & LSM_FLAG_EXCLUSIVE) && exclusive) {
 137                 init_debug("exclusive disabled: %s\n", lsm->name);
 138                 return false;
 139         }
 140
 141         return true;
 142 }
 143
 144 static void __init lsm_set_blob_size(int *need, int *lbs)
 145 {
 146         int offset;
 147
 148         if (*need > 0) {
 149                 offset = *lbs;
 150                 *lbs += *need;
 151                 *need = offset;
 152         }
 153 }
 154
 155 static void __init lsm_set_blob_sizes(struct lsm_blob_sizes *needed)
 156 {
 157         if (!needed)
 158                 return;
 159
 160         lsm_set_blob_size(&needed->lbs_cred, &blob_sizes.lbs_cred);
 161         lsm_set_blob_size(&needed->lbs_file, &blob_sizes.lbs_file);
 162         /*
 163          * The inode blob gets an rcu_head in addition to
 164          * what the modules might need.
 165          */
 166         if (needed->lbs_inode && blob_sizes.lbs_inode == 0)
 167                 blob_sizes.lbs_inode = sizeof(struct rcu_head);
 168         lsm_set_blob_size(&needed->lbs_inode, &blob_sizes.lbs_inode);
 169         lsm_set_blob_size(&needed->lbs_ipc, &blob_sizes.lbs_ipc);
 170         lsm_set_blob_size(&needed->lbs_msg_msg, &blob_sizes.lbs_msg_msg);
 171         lsm_set_blob_size(&needed->lbs_task, &blob_sizes.lbs_task);
 172 }
 173
 174 /* Prepare LSM for initialization. */
 175 static void __init prepare_lsm(struct lsm_info *lsm)
 176 {
 177         int enabled = lsm_allowed(lsm);
 178
 179         /* Record enablement (to handle any following exclusive LSMs). */
 180         set_enabled(lsm, enabled);
 181
 182         /* If enabled, do pre-initialization work. */
 183         if (enabled) {
 184                 if ((lsm->flags & LSM_FLAG_EXCLUSIVE) && !exclusive) {
 185                         exclusive = lsm;
 186                         init_debug("exclusive chosen: %s\n", lsm->name);
 187                 }
 188
 189                 lsm_set_blob_sizes(lsm->blobs);
 190         }
 191 }
 192
 193 /* Initialize a given LSM, if it is enabled. */
 194 static void __init initialize_lsm(struct lsm_info *lsm)
 195 {
 196         if (is_enabled(lsm)) {
 197                 int ret;
 198
 199                 init_debug("initializing %s\n", lsm->name);
 200                 ret = lsm->init();
 201                 WARN(ret, "%s failed to initialize: %d\n", lsm->name, ret);
 202         }
 203 }
 204
 205 /* Populate ordered LSMs list from comma-separated LSM name list. */
 206 static void __init ordered_lsm_parse(const char *order, const char *origin)
 207 {
 208         struct lsm_info *lsm;
 209         char *sep, *name, *next;
 210
 211         /* LSM_ORDER_FIRST is always first. */
 212         for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) {
 213                 if (lsm->order == LSM_ORDER_FIRST)
 214                         append_ordered_lsm(lsm, "first");
 215         }
 216
 217         /* Process "security=", if given. */
 218         if (chosen_major_lsm) {
 219                 struct lsm_info *major;
 220
 221                 /*
 222                  * To match the original "security=" behavior, this
 223                  * explicitly does NOT fallback to another Legacy Major
 224                  * if the selected one was separately disabled: disable
 225                  * all non-matching Legacy Major LSMs.
 226                  */
 227                 for (major = __start_lsm_info; major < __end_lsm_info;
 228                      major++) {
 229                         if ((major->flags & LSM_FLAG_LEGACY_MAJOR) &&
 230                             strcmp(major->name, chosen_major_lsm) != 0) {
 231                                 set_enabled(major, false);
 232                                 init_debug("security=%s disabled: %s\n",
 233                                            chosen_major_lsm, major->name);
 234                         }
 235                 }
 236         }
 237
 238         sep = kstrdup(order, GFP_KERNEL);
 239         next = sep;
 240         /* Walk the list, looking for matching LSMs. */
 241         while ((name = strsep(&next, ",")) != NULL) {
 242                 bool found = false;
 243
 244                 for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) {
 245                         if (lsm->order == LSM_ORDER_MUTABLE &&
 246                             strcmp(lsm->name, name) == 0) {
 247                                 append_ordered_lsm(lsm, origin);
 248                                 found = true;
 249                         }
 250                 }
 251
 252                 if (!found)
 253                         init_debug("%s ignored: %s\n", origin, name);
 254         }
 255
 256         /* Process "security=", if given. */
 257         if (chosen_major_lsm) {
 258                 for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) {
 259                         if (exists_ordered_lsm(lsm))
 260                                 continue;
 261                         if (strcmp(lsm->name, chosen_major_lsm) == 0)
 262                                 append_ordered_lsm(lsm, "security=");
 263                 }
 264         }
 265
 266         /* Disable all LSMs not in the ordered list. */
 267         for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) {
 268                 if (exists_ordered_lsm(lsm))
 269                         continue;
 270                 set_enabled(lsm, false);
 271                 init_debug("%s disabled: %s\n", origin, lsm->name);
 272         }
 273
 274         kfree(sep);
 275 }
 276
 277 static void __init lsm_early_cred(struct cred *cred);
 278 static void __init lsm_early_task(struct task_struct *task);
 279
 280 static void __init ordered_lsm_init(void)
 281 {
 282         struct lsm_info **lsm;
 283
 284         ordered_lsms = kcalloc(LSM_COUNT + 1, sizeof(*ordered_lsms),
 285                                 GFP_KERNEL);
 286
 287         if (chosen_lsm_order) {
 288                 if (chosen_major_lsm) {
 289                         pr_info("security= is ignored because it is superseded by lsm=\n");
 290                         chosen_major_lsm = NULL;
 291                 }
 292                 ordered_lsm_parse(chosen_lsm_order, "cmdline");
 293         } else
 294                 ordered_lsm_parse(builtin_lsm_order, "builtin");
 295
 296         for (lsm = ordered_lsms; *lsm; lsm++)
 297                 prepare_lsm(*lsm);
 298
 299         init_debug("cred blob size     = %d\n", blob_sizes.lbs_cred);
 300         init_debug("file blob size     = %d\n", blob_sizes.lbs_file);
 301         init_debug("inode blob size    = %d\n", blob_sizes.lbs_inode);
 302         init_debug("ipc blob size      = %d\n", blob_sizes.lbs_ipc);
 303         init_debug("msg_msg blob size  = %d\n", blob_sizes.lbs_msg_msg);
 304         init_debug("task blob size     = %d\n", blob_sizes.lbs_task);
 305
 306         /*
 307          * Create any kmem_caches needed for blobs
 308          */
 309         if (blob_sizes.lbs_file)
 310                 lsm_file_cache = kmem_cache_create("lsm_file_cache",
 311                                                    blob_sizes.lbs_file, 0,
 312                                                    SLAB_PANIC, NULL);
 313         if (blob_sizes.lbs_inode)
 314                 lsm_inode_cache = kmem_cache_create("lsm_inode_cache",
 315                                                     blob_sizes.lbs_inode, 0,
 316                                                     SLAB_PANIC, NULL);
 317
 318         lsm_early_cred((struct cred *) current->cred);
 319         lsm_early_task(current);
 320         for (lsm = ordered_lsms; *lsm; lsm++)
 321                 initialize_lsm(*lsm);
 322
 323         kfree(ordered_lsms);
 324 }
 325
 326 /**
 327  * security_init - initializes the security framework
 328  *
 329  * This should be called early in the kernel initialization sequence.
 330  */
 331 int __init security_init(void)
 332 {
 333         int i;
 334         struct hlist_head *list = (struct hlist_head *) &security_hook_heads;
 335
 336         pr_info("Security Framework initializing\n");
 337
 338         for (i = 0; i < sizeof(security_hook_heads) / sizeof(struct hlist_head);
 339              i++)
 340                 INIT_HLIST_HEAD(&list[i]);
 341
 342         /* Load LSMs in specified order. */
 343         ordered_lsm_init();
 344
 345         return 0;
 346 }
 347
 348 /* Save user chosen LSM */
 349 static int __init choose_major_lsm(char *str)
 350 {
 351         chosen_major_lsm = str;
 352         return 1;
 353 }
 354 __setup("security=", choose_major_lsm);
 355
 356 /* Explicitly choose LSM initialization order. */
 357 static int __init choose_lsm_order(char *str)
 358 {
 359         chosen_lsm_order = str;
 360         return 1;
 361 }
 362 __setup("lsm=", choose_lsm_order);
 363
 364 /* Enable LSM order debugging. */
 365 static int __init enable_debug(char *str)
 366 {
 367         debug = true;
 368         return 1;
 369 }
 370 __setup("lsm.debug", enable_debug);
 371
 372 static bool match_last_lsm(const char *list, const char *lsm)
 373 {
 374         const char *last;
 375
 376         if (WARN_ON(!list || !lsm))
 377                 return false;
 378         last = strrchr(list, ',');
 379         if (last)
 380                 /* Pass the comma, strcmp() will check for '\0' */
 381                 last++;
 382         else
 383                 last = list;
 384         return !strcmp(last, lsm);
 385 }
 386
 387 static int lsm_append(char *new, char **result)
 388 {
 389         char *cp;
 390
 391         if (*result == NULL) {
 392                 *result = kstrdup(new, GFP_KERNEL);
 393                 if (*result == NULL)
 394                         return -ENOMEM;
 395         } else {
 396                 /* Check if it is the last registered name */
 397                 if (match_last_lsm(*result, new))
 398                         return 0;
 399                 cp = kasprintf(GFP_KERNEL, "%s,%s", *result, new);
 400                 if (cp == NULL)
 401                         return -ENOMEM;
 402                 kfree(*result);
 403                 *result = cp;
 404         }
 405         return 0;
 406 }
 407
 408 /**
 409  * security_add_hooks - Add a modules hooks to the hook lists.
 410  * @hooks: the hooks to add
 411  * @count: the number of hooks to add
 412  * @lsm: the name of the security module
 413  *
 414  * Each LSM has to register its hooks with the infrastructure.
 415  */
 416 void __init security_add_hooks(struct security_hook_list *hooks, int count,
 417                                 char *lsm)
 418 {
 419         int i;
 420
 421         for (i = 0; i < count; i++) {
 422                 hooks[i].lsm = lsm;
 423                 hlist_add_tail_rcu(&hooks[i].list, hooks[i].head);
 424         }
 425         if (lsm_append(lsm, &lsm_names) < 0)
 426                 panic("%s - Cannot get early memory.\n", __func__);
 427 }
 428
 429 int call_blocking_lsm_notifier(enum lsm_event event, void *data)
 430 {
 431         return blocking_notifier_call_chain(&blocking_lsm_notifier_chain,
 432                                             event, data);
 433 }
 434 EXPORT_SYMBOL(call_blocking_lsm_notifier);
 435
 436 int register_blocking_lsm_notifier(struct notifier_block *nb)
 437 {
 438         return blocking_notifier_chain_register(&blocking_lsm_notifier_chain,
 439                                                 nb);
 440 }
 441 EXPORT_SYMBOL(register_blocking_lsm_notifier);
 442
 443 int unregister_blocking_lsm_notifier(struct notifier_block *nb)
 444 {
 445         return blocking_notifier_chain_unregister(&blocking_lsm_notifier_chain,
 446                                                   nb);
 447 }
 448 EXPORT_SYMBOL(unregister_blocking_lsm_notifier);
 449
 450 /**
 451  * lsm_cred_alloc - allocate a composite cred blob
 452  * @cred: the cred that needs a blob
 453  * @gfp: allocation type
 454  *
 455  * Allocate the cred blob for all the modules
 456  *
 457  * Returns 0, or -ENOMEM if memory can't be allocated.
 458  */
 459 static int lsm_cred_alloc(struct cred *cred, gfp_t gfp)
 460 {
 461         if (blob_sizes.lbs_cred == 0) {
 462                 cred->security = NULL;
 463                 return 0;
 464         }
 465
 466         cred->security = kzalloc(blob_sizes.lbs_cred, gfp);
 467         if (cred->security == NULL)
 468                 return -ENOMEM;
 469         return 0;
 470 }
 471
 472 /**
 473  * lsm_early_cred - during initialization allocate a composite cred blob
 474  * @cred: the cred that needs a blob
 475  *
 476  * Allocate the cred blob for all the modules
 477  */
 478 static void __init lsm_early_cred(struct cred *cred)
 479 {
 480         int rc = lsm_cred_alloc(cred, GFP_KERNEL);
 481
 482         if (rc)
 483                 panic("%s: Early cred alloc failed.\n", __func__);
 484 }
 485
 486 /**
 487  * lsm_file_alloc - allocate a composite file blob
 488  * @file: the file that needs a blob
 489  *
 490  * Allocate the file blob for all the modules
 491  *
 492  * Returns 0, or -ENOMEM if memory can't be allocated.
 493  */
 494 static int lsm_file_alloc(struct file *file)
 495 {
 496         if (!lsm_file_cache) {
 497                 file->f_security = NULL;
 498                 return 0;
 499         }
 500
 501         file->f_security = kmem_cache_zalloc(lsm_file_cache, GFP_KERNEL);
 502         if (file->f_security == NULL)
 503                 return -ENOMEM;
 504         return 0;
 505 }
 506
 507 /**
 508  * lsm_inode_alloc - allocate a composite inode blob
 509  * @inode: the inode that needs a blob
 510  *
 511  * Allocate the inode blob for all the modules
 512  *
 513  * Returns 0, or -ENOMEM if memory can't be allocated.
 514  */
 515 int lsm_inode_alloc(struct inode *inode)
 516 {
 517         if (!lsm_inode_cache) {
 518                 inode->i_security = NULL;
 519                 return 0;
 520         }
 521
 522         inode->i_security = kmem_cache_zalloc(lsm_inode_cache, GFP_NOFS);
 523         if (inode->i_security == NULL)
 524                 return -ENOMEM;
 525         return 0;
 526 }
 527
 528 /**
 529  * lsm_task_alloc - allocate a composite task blob
 530  * @task: the task that needs a blob
 531  *
 532  * Allocate the task blob for all the modules
 533  *
 534  * Returns 0, or -ENOMEM if memory can't be allocated.
 535  */
 536 static int lsm_task_alloc(struct task_struct *task)
 537 {
 538         if (blob_sizes.lbs_task == 0) {
 539                 task->security = NULL;
 540                 return 0;
 541         }
 542
 543         task->security = kzalloc(blob_sizes.lbs_task, GFP_KERNEL);
 544         if (task->security == NULL)
 545                 return -ENOMEM;
 546         return 0;
 547 }
 548
 549 /**
 550  * lsm_ipc_alloc - allocate a composite ipc blob
 551  * @kip: the ipc that needs a blob
 552  *
 553  * Allocate the ipc blob for all the modules
 554  *
 555  * Returns 0, or -ENOMEM if memory can't be allocated.
 556  */
 557 static int lsm_ipc_alloc(struct kern_ipc_perm *kip)
 558 {
 559         if (blob_sizes.lbs_ipc == 0) {
 560                 kip->security = NULL;
 561                 return 0;
 562         }
 563
 564         kip->security = kzalloc(blob_sizes.lbs_ipc, GFP_KERNEL);
 565         if (kip->security == NULL)
 566                 return -ENOMEM;
 567         return 0;
 568 }
 569
 570 /**
 571  * lsm_msg_msg_alloc - allocate a composite msg_msg blob
 572  * @mp: the msg_msg that needs a blob
 573  *
 574  * Allocate the ipc blob for all the modules
 575  *
 576  * Returns 0, or -ENOMEM if memory can't be allocated.
 577  */
 578 static int lsm_msg_msg_alloc(struct msg_msg *mp)
 579 {
 580         if (blob_sizes.lbs_msg_msg == 0) {
 581                 mp->security = NULL;
 582                 return 0;
 583         }
 584
 585         mp->security = kzalloc(blob_sizes.lbs_msg_msg, GFP_KERNEL);
 586         if (mp->security == NULL)
 587                 return -ENOMEM;
 588         return 0;
 589 }
 590
 591 /**
 592  * lsm_early_task - during initialization allocate a composite task blob
 593  * @task: the task that needs a blob
 594  *
 595  * Allocate the task blob for all the modules
 596  */
 597 static void __init lsm_early_task(struct task_struct *task)
 598 {
 599         int rc = lsm_task_alloc(task);
 600
 601         if (rc)
 602                 panic("%s: Early task alloc failed.\n", __func__);
 603 }
 604
 605 /*
 606  * Hook list operation macros.
 607  *
 608  * call_void_hook:
 609  *      This is a hook that does not return a value.
 610  *
 611  * call_int_hook:
 612  *      This is a hook that returns a value.
 613  */
 614
 615 #define call_void_hook(FUNC, ...)                               \
 616         do {                                                    \
 617                 struct security_hook_list *P;                   \
 618                                                                 \
 619                 hlist_for_each_entry(P, &security_hook_heads.FUNC, list) \
 620                         P->hook.FUNC(__VA_ARGS__);              \
 621         } while (0)
 622
 623 #define call_int_hook(FUNC, IRC, ...) ({                        \
 624         int RC = IRC;                                           \
 625         do {                                                    \
 626                 struct security_hook_list *P;                   \
 627                                                                 \
 628                 hlist_for_each_entry(P, &security_hook_heads.FUNC, list) { \
 629                         RC = P->hook.FUNC(__VA_ARGS__);         \
 630                         if (RC != 0)                            \
 631                                 break;                          \
 632                 }                                               \
 633         } while (0);                                            \
 634         RC;                                                     \
 635 })
 636
 637 /* Security operations */
 638
 639 int security_binder_set_context_mgr(struct task_struct *mgr)
 640 {
 641         return call_int_hook(binder_set_context_mgr, 0, mgr);
 642 }
 643
 644 int security_binder_transaction(struct task_struct *from,
 645                                 struct task_struct *to)
 646 {
 647         return call_int_hook(binder_transaction, 0, from, to);
 648 }
 649
 650 int security_binder_transfer_binder(struct task_struct *from,
 651                                     struct task_struct *to)
 652 {
 653         return call_int_hook(binder_transfer_binder, 0, from, to);
 654 }
 655
 656 int security_binder_transfer_file(struct task_struct *from,
 657                                   struct task_struct *to, struct file *file)
 658 {
 659         return call_int_hook(binder_transfer_file, 0, from, to, file);
 660 }
 661
 662 int security_ptrace_access_check(struct task_struct *child, unsigned int mode)
 663 {
 664         return call_int_hook(ptrace_access_check, 0, child, mode);
 665 }
 666
 667 int security_ptrace_traceme(struct task_struct *parent)
 668 {
 669         return call_int_hook(ptrace_traceme, 0, parent);
 670 }
 671
 672 int security_capget(struct task_struct *target,
 673                      kernel_cap_t *effective,
 674                      kernel_cap_t *inheritable,
 675                      kernel_cap_t *permitted)
 676 {
 677         return call_int_hook(capget, 0, target,
 678                                 effective, inheritable, permitted);
 679 }
 680
 681 int security_capset(struct cred *new, const struct cred *old,
 682                     const kernel_cap_t *effective,
 683                     const kernel_cap_t *inheritable,
 684                     const kernel_cap_t *permitted)
 685 {
 686         return call_int_hook(capset, 0, new, old,
 687                                 effective, inheritable, permitted);
 688 }
 689
 690 int security_capable(const struct cred *cred,
 691                      struct user_namespace *ns,
 692                      int cap,
 693                      unsigned int opts)
 694 {
 695         return call_int_hook(capable, 0, cred, ns, cap, opts);
 696 }
 697
 698 int security_quotactl(int cmds, int type, int id, struct super_block *sb)
 699 {
 700         return call_int_hook(quotactl, 0, cmds, type, id, sb);
 701 }
 702
 703 int security_quota_on(struct dentry *dentry)
 704 {
 705         return call_int_hook(quota_on, 0, dentry);
 706 }
 707
 708 int security_syslog(int type)
 709 {
 710         return call_int_hook(syslog, 0, type);
 711 }
 712
 713 int security_settime64(const struct timespec64 *ts, const struct timezone *tz)
 714 {
 715         return call_int_hook(settime, 0, ts, tz);
 716 }
 717
 718 int security_vm_enough_memory_mm(struct mm_struct *mm, long pages)
 719 {
 720         struct security_hook_list *hp;
 721         int cap_sys_admin = 1;
 722         int rc;
 723
 724         /*
 725          * The module will respond with a positive value if
 726          * it thinks the __vm_enough_memory() call should be
 727          * made with the cap_sys_admin set. If all of the modules
 728          * agree that it should be set it will. If any module
 729          * thinks it should not be set it won't.
 730          */
 731         hlist_for_each_entry(hp, &security_hook_heads.vm_enough_memory, list) {
 732                 rc = hp->hook.vm_enough_memory(mm, pages);
 733                 if (rc <= 0) {
 734                         cap_sys_admin = 0;
 735                         break;
 736                 }
 737         }
 738         return __vm_enough_memory(mm, pages, cap_sys_admin);
 739 }
 740
 741 int security_bprm_set_creds(struct linux_binprm *bprm)
 742 {
 743         return call_int_hook(bprm_set_creds, 0, bprm);
 744 }
 745
 746 int security_bprm_check(struct linux_binprm *bprm)
 747 {
 748         int ret;
 749
 750         ret = call_int_hook(bprm_check_security, 0, bprm);
 751         if (ret)
 752                 return ret;
 753         return ima_bprm_check(bprm);
 754 }
 755
 756 void security_bprm_committing_creds(struct linux_binprm *bprm)
 757 {
 758         call_void_hook(bprm_committing_creds, bprm);
 759 }
 760
 761 void security_bprm_committed_creds(struct linux_binprm *bprm)
 762 {
 763         call_void_hook(bprm_committed_creds, bprm);
 764 }
 765
 766 int security_fs_context_dup(struct fs_context *fc, struct fs_context *src_fc)
 767 {
 768         return call_int_hook(fs_context_dup, 0, fc, src_fc);
 769 }
 770
 771 int security_fs_context_parse_param(struct fs_context *fc, struct fs_parameter *param)
 772 {
 773         return call_int_hook(fs_context_parse_param, -ENOPARAM, fc, param);
 774 }
 775
 776 int security_sb_alloc(struct super_block *sb)
 777 {
 778         return call_int_hook(sb_alloc_security, 0, sb);
 779 }
 780
 781 void security_sb_free(struct super_block *sb)
 782 {
 783         call_void_hook(sb_free_security, sb);
 784 }
 785
 786 void security_free_mnt_opts(void **mnt_opts)
 787 {
 788         if (!*mnt_opts)
 789                 return;
 790         call_void_hook(sb_free_mnt_opts, *mnt_opts);
 791         *mnt_opts = NULL;
 792 }
 793 EXPORT_SYMBOL(security_free_mnt_opts);
 794
 795 int security_sb_eat_lsm_opts(char *options, void **mnt_opts)
 796 {
 797         return call_int_hook(sb_eat_lsm_opts, 0, options, mnt_opts);
 798 }
 799 EXPORT_SYMBOL(security_sb_eat_lsm_opts);
 800
 801 int security_sb_remount(struct super_block *sb,
 802                         void *mnt_opts)
 803 {
 804         return call_int_hook(sb_remount, 0, sb, mnt_opts);
 805 }
 806 EXPORT_SYMBOL(security_sb_remount);
 807
 808 int security_sb_kern_mount(struct super_block *sb)
 809 {
 810         return call_int_hook(sb_kern_mount, 0, sb);
 811 }
 812
 813 int security_sb_show_options(struct seq_file *m, struct super_block *sb)
 814 {
 815         return call_int_hook(sb_show_options, 0, m, sb);
 816 }
 817
 818 int security_sb_statfs(struct dentry *dentry)
 819 {
 820         return call_int_hook(sb_statfs, 0, dentry);
 821 }
 822
 823 int security_sb_mount(const char *dev_name, const struct path *path,
 824                        const char *type, unsigned long flags, void *data)
 825 {
 826         return call_int_hook(sb_mount, 0, dev_name, path, type, flags, data);
 827 }
 828
 829 int security_sb_umount(struct vfsmount *mnt, int flags)
 830 {
 831         return call_int_hook(sb_umount, 0, mnt, flags);
 832 }
 833
 834 int security_sb_pivotroot(const struct path *old_path, const struct path *new_path)
 835 {
 836         return call_int_hook(sb_pivotroot, 0, old_path, new_path);
 837 }
 838
 839 int security_sb_set_mnt_opts(struct super_block *sb,
 840                                 void *mnt_opts,
 841                                 unsigned long kern_flags,
 842                                 unsigned long *set_kern_flags)
 843 {
 844         return call_int_hook(sb_set_mnt_opts,
 845                                 mnt_opts ? -EOPNOTSUPP : 0, sb,
 846                                 mnt_opts, kern_flags, set_kern_flags);
 847 }
 848 EXPORT_SYMBOL(security_sb_set_mnt_opts);
 849
 850 int security_sb_clone_mnt_opts(const struct super_block *oldsb,
 851                                 struct super_block *newsb,
 852                                 unsigned long kern_flags,
 853                                 unsigned long *set_kern_flags)
 854 {
 855         return call_int_hook(sb_clone_mnt_opts, 0, oldsb, newsb,
 856                                 kern_flags, set_kern_flags);
 857 }
 858 EXPORT_SYMBOL(security_sb_clone_mnt_opts);
 859
 860 int security_add_mnt_opt(const char *option, const char *val, int len,
 861                          void **mnt_opts)
 862 {
 863         return call_int_hook(sb_add_mnt_opt, -EINVAL,
 864                                         option, val, len, mnt_opts);
 865 }
 866 EXPORT_SYMBOL(security_add_mnt_opt);
 867
 868 int security_move_mount(const struct path *from_path, const struct path *to_path)
 869 {
 870         return call_int_hook(move_mount, 0, from_path, to_path);
 871 }
 872
 873 int security_inode_alloc(struct inode *inode)
 874 {
 875         int rc = lsm_inode_alloc(inode);
 876
 877         if (unlikely(rc))
 878                 return rc;
 879         rc = call_int_hook(inode_alloc_security, 0, inode);
 880         if (unlikely(rc))
 881                 security_inode_free(inode);
 882         return rc;
 883 }
 884
 885 static void inode_free_by_rcu(struct rcu_head *head)
 886 {
 887         /*
 888          * The rcu head is at the start of the inode blob
 889          */
 890         kmem_cache_free(lsm_inode_cache, head);
 891 }
 892
 893 void security_inode_free(struct inode *inode)
 894 {
 895         integrity_inode_free(inode);
 896         call_void_hook(inode_free_security, inode);
 897         /*
 898          * The inode may still be referenced in a path walk and
 899          * a call to security_inode_permission() can be made
 900          * after inode_free_security() is called. Ideally, the VFS
 901          * wouldn't do this, but fixing that is a much harder
 902          * job. For now, simply free the i_security via RCU, and
 903          * leave the current inode->i_security pointer intact.
 904          * The inode will be freed after the RCU grace period too.
 905          */
 906         if (inode->i_security)
 907                 call_rcu((struct rcu_head *)inode->i_security,
 908                                 inode_free_by_rcu);
 909 }
 910
 911 int security_dentry_init_security(struct dentry *dentry, int mode,
 912                                         const struct qstr *name, void **ctx,
 913                                         u32 *ctxlen)
 914 {
 915         return call_int_hook(dentry_init_security, -EOPNOTSUPP, dentry, mode,
 916                                 name, ctx, ctxlen);
 917 }
 918 EXPORT_SYMBOL(security_dentry_init_security);
 919
 920 int security_dentry_create_files_as(struct dentry *dentry, int mode,
 921                                     struct qstr *name,
 922                                     const struct cred *old, struct cred *new)
 923 {
 924         return call_int_hook(dentry_create_files_as, 0, dentry, mode,
 925                                 name, old, new);
 926 }
 927 EXPORT_SYMBOL(security_dentry_create_files_as);
 928
 929 int security_inode_init_security(struct inode *inode, struct inode *dir,
 930                                  const struct qstr *qstr,
 931                                  const initxattrs initxattrs, void *fs_data)
 932 {
 933         struct xattr new_xattrs[MAX_LSM_EVM_XATTR + 1];
 934         struct xattr *lsm_xattr, *evm_xattr, *xattr;
 935         int ret;
 936
 937         if (unlikely(IS_PRIVATE(inode)))
 938                 return 0;
 939
 940         if (!initxattrs)
 941                 return call_int_hook(inode_init_security, -EOPNOTSUPP, inode,
 942                                      dir, qstr, NULL, NULL, NULL);
 943         memset(new_xattrs, 0, sizeof(new_xattrs));
 944         lsm_xattr = new_xattrs;
 945         ret = call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir, qstr,
 946                                                 &lsm_xattr->name,
 947                                                 &lsm_xattr->value,
 948                                                 &lsm_xattr->value_len);
 949         if (ret)
 950                 goto out;
 951
 952         evm_xattr = lsm_xattr + 1;
 953         ret = evm_inode_init_security(inode, lsm_xattr, evm_xattr);
 954         if (ret)
 955                 goto out;
 956         ret = initxattrs(inode, new_xattrs, fs_data);
 957 out:
 958         for (xattr = new_xattrs; xattr->value != NULL; xattr++)
 959                 kfree(xattr->value);
 960         return (ret == -EOPNOTSUPP) ? 0 : ret;
 961 }
 962 EXPORT_SYMBOL(security_inode_init_security);
 963
 964 int security_old_inode_init_security(struct inode *inode, struct inode *dir,
 965                                      const struct qstr *qstr, const char **name,
 966                                      void **value, size_t *len)
 967 {
 968         if (unlikely(IS_PRIVATE(inode)))
 969                 return -EOPNOTSUPP;
 970         return call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir,
 971                              qstr, name, value, len);
 972 }
 973 EXPORT_SYMBOL(security_old_inode_init_security);
 974
 975 #ifdef CONFIG_SECURITY_PATH
 976 int security_path_mknod(const struct path *dir, struct dentry *dentry, umode_t mode,
 977                         unsigned int dev)
 978 {
 979         if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
 980                 return 0;
 981         return call_int_hook(path_mknod, 0, dir, dentry, mode, dev);
 982 }
 983 EXPORT_SYMBOL(security_path_mknod);
 984
 985 int security_path_mkdir(const struct path *dir, struct dentry *dentry, umode_t mode)
 986 {
 987         if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
 988                 return 0;
 989         return call_int_hook(path_mkdir, 0, dir, dentry, mode);
 990 }
 991 EXPORT_SYMBOL(security_path_mkdir);
 992
 993 int security_path_rmdir(const struct path *dir, struct dentry *dentry)
 994 {
 995         if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
 996                 return 0;
 997         return call_int_hook(path_rmdir, 0, dir, dentry);
 998 }
 999
1000 int security_path_unlink(const struct path *dir, struct dentry *dentry)
1001 {
1002         if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
1003                 return 0;
1004         return call_int_hook(path_unlink, 0, dir, dentry);
1005 }
1006 EXPORT_SYMBOL(security_path_unlink);
1007
1008 int security_path_symlink(const struct path *dir, struct dentry *dentry,
1009                           const char *old_name)
1010 {
1011         if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
1012                 return 0;
1013         return call_int_hook(path_symlink, 0, dir, dentry, old_name);
1014 }
1015
1016 int security_path_link(struct dentry *old_dentry, const struct path *new_dir,
1017                        struct dentry *new_dentry)
1018 {
1019         if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry))))
1020                 return 0;
1021         return call_int_hook(path_link, 0, old_dentry, new_dir, new_dentry);
1022 }
1023
1024 int security_path_rename(const struct path *old_dir, struct dentry *old_dentry,
1025                          const struct path *new_dir, struct dentry *new_dentry,
1026                          unsigned int flags)
1027 {
1028         if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) ||
1029                      (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry)))))
1030                 return 0;
1031
1032         if (flags & RENAME_EXCHANGE) {
1033                 int err = call_int_hook(path_rename, 0, new_dir, new_dentry,
1034                                         old_dir, old_dentry);
1035                 if (err)
1036                         return err;
1037         }
1038
1039         return call_int_hook(path_rename, 0, old_dir, old_dentry, new_dir,
1040                                 new_dentry);
1041 }
1042 EXPORT_SYMBOL(security_path_rename);
1043
1044 int security_path_truncate(const struct path *path)
1045 {
1046         if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
1047                 return 0;
1048         return call_int_hook(path_truncate, 0, path);
1049 }
1050
1051 int security_path_chmod(const struct path *path, umode_t mode)
1052 {
1053         if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
1054                 return 0;
1055         return call_int_hook(path_chmod, 0, path, mode);
1056 }
1057
1058 int security_path_chown(const struct path *path, kuid_t uid, kgid_t gid)
1059 {
1060         if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
1061                 return 0;
1062         return call_int_hook(path_chown, 0, path, uid, gid);
1063 }
1064
1065 int security_path_chroot(const struct path *path)
1066 {
1067         return call_int_hook(path_chroot, 0, path);
1068 }
1069 #endif
1070
1071 int security_inode_create(struct inode *dir, struct dentry *dentry, umode_t mode)
1072 {
1073         if (unlikely(IS_PRIVATE(dir)))
1074                 return 0;
1075         return call_int_hook(inode_create, 0, dir, dentry, mode);
1076 }
1077 EXPORT_SYMBOL_GPL(security_inode_create);
1078
1079 int security_inode_link(struct dentry *old_dentry, struct inode *dir,
1080                          struct dentry *new_dentry)
1081 {
1082         if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry))))
1083                 return 0;
1084         return call_int_hook(inode_link, 0, old_dentry, dir, new_dentry);
1085 }
1086
1087 int security_inode_unlink(struct inode *dir, struct dentry *dentry)
1088 {
1089         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1090                 return 0;
1091         return call_int_hook(inode_unlink, 0, dir, dentry);
1092 }
1093
1094 int security_inode_symlink(struct inode *dir, struct dentry *dentry,
1095                             const char *old_name)
1096 {
1097         if (unlikely(IS_PRIVATE(dir)))
1098                 return 0;
1099         return call_int_hook(inode_symlink, 0, dir, dentry, old_name);
1100 }
1101
1102 int security_inode_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
1103 {
1104         if (unlikely(IS_PRIVATE(dir)))
1105                 return 0;
1106         return call_int_hook(inode_mkdir, 0, dir, dentry, mode);
1107 }
1108 EXPORT_SYMBOL_GPL(security_inode_mkdir);
1109
1110 int security_inode_rmdir(struct inode *dir, struct dentry *dentry)
1111 {
1112         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1113                 return 0;
1114         return call_int_hook(inode_rmdir, 0, dir, dentry);
1115 }
1116
1117 int security_inode_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t dev)
1118 {
1119         if (unlikely(IS_PRIVATE(dir)))
1120                 return 0;
1121         return call_int_hook(inode_mknod, 0, dir, dentry, mode, dev);
1122 }
1123
1124 int security_inode_rename(struct inode *old_dir, struct dentry *old_dentry,
1125                            struct inode *new_dir, struct dentry *new_dentry,
1126                            unsigned int flags)
1127 {
1128         if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) ||
1129             (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry)))))
1130                 return 0;
1131
1132         if (flags & RENAME_EXCHANGE) {
1133                 int err = call_int_hook(inode_rename, 0, new_dir, new_dentry,
1134                                                      old_dir, old_dentry);
1135                 if (err)
1136                         return err;
1137         }
1138
1139         return call_int_hook(inode_rename, 0, old_dir, old_dentry,
1140                                            new_dir, new_dentry);
1141 }
1142
1143 int security_inode_readlink(struct dentry *dentry)
1144 {
1145         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1146                 return 0;
1147         return call_int_hook(inode_readlink, 0, dentry);
1148 }
1149
1150 int security_inode_follow_link(struct dentry *dentry, struct inode *inode,
1151                                bool rcu)
1152 {
1153         if (unlikely(IS_PRIVATE(inode)))
1154                 return 0;
1155         return call_int_hook(inode_follow_link, 0, dentry, inode, rcu);
1156 }
1157
1158 int security_inode_permission(struct inode *inode, int mask)
1159 {
1160         if (unlikely(IS_PRIVATE(inode)))
1161                 return 0;
1162         return call_int_hook(inode_permission, 0, inode, mask);
1163 }
1164
1165 int security_inode_setattr(struct dentry *dentry, struct iattr *attr)
1166 {
1167         int ret;
1168
1169         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1170                 return 0;
1171         ret = call_int_hook(inode_setattr, 0, dentry, attr);
1172         if (ret)
1173                 return ret;
1174         return evm_inode_setattr(dentry, attr);
1175 }
1176 EXPORT_SYMBOL_GPL(security_inode_setattr);
1177
1178 int security_inode_getattr(const struct path *path)
1179 {
1180         if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
1181                 return 0;
1182         return call_int_hook(inode_getattr, 0, path);
1183 }
1184
1185 int security_inode_setxattr(struct dentry *dentry, const char *name,
1186                             const void *value, size_t size, int flags)
1187 {
1188         int ret;
1189
1190         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1191                 return 0;
1192         /*
1193          * SELinux and Smack integrate the cap call,
1194          * so assume that all LSMs supplying this call do so.
1195          */
1196         ret = call_int_hook(inode_setxattr, 1, dentry, name, value, size,
1197                                 flags);
1198
1199         if (ret == 1)
1200                 ret = cap_inode_setxattr(dentry, name, value, size, flags);
1201         if (ret)
1202                 return ret;
1203         ret = ima_inode_setxattr(dentry, name, value, size);
1204         if (ret)
1205                 return ret;
1206         return evm_inode_setxattr(dentry, name, value, size);
1207 }
1208
1209 void security_inode_post_setxattr(struct dentry *dentry, const char *name,
1210                                   const void *value, size_t size, int flags)
1211 {
1212         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1213                 return;
1214         call_void_hook(inode_post_setxattr, dentry, name, value, size, flags);
1215         evm_inode_post_setxattr(dentry, name, value, size);
1216 }
1217
1218 int security_inode_getxattr(struct dentry *dentry, const char *name)
1219 {
1220         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1221                 return 0;
1222         return call_int_hook(inode_getxattr, 0, dentry, name);
1223 }
1224
1225 int security_inode_listxattr(struct dentry *dentry)
1226 {
1227         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1228                 return 0;
1229         return call_int_hook(inode_listxattr, 0, dentry);
1230 }
1231
1232 int security_inode_removexattr(struct dentry *dentry, const char *name)
1233 {
1234         int ret;
1235
1236         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1237                 return 0;
1238         /*
1239          * SELinux and Smack integrate the cap call,
1240          * so assume that all LSMs supplying this call do so.
1241          */
1242         ret = call_int_hook(inode_removexattr, 1, dentry, name);
1243         if (ret == 1)
1244                 ret = cap_inode_removexattr(dentry, name);
1245         if (ret)
1246                 return ret;
1247         ret = ima_inode_removexattr(dentry, name);
1248         if (ret)
1249                 return ret;
1250         return evm_inode_removexattr(dentry, name);
1251 }
1252
1253 int security_inode_need_killpriv(struct dentry *dentry)
1254 {
1255         return call_int_hook(inode_need_killpriv, 0, dentry);
1256 }
1257
1258 int security_inode_killpriv(struct dentry *dentry)
1259 {
1260         return call_int_hook(inode_killpriv, 0, dentry);
1261 }
1262
1263 int security_inode_getsecurity(struct inode *inode, const char *name, void **buffer, bool alloc)
1264 {
1265         struct security_hook_list *hp;
1266         int rc;
1267
1268         if (unlikely(IS_PRIVATE(inode)))
1269                 return -EOPNOTSUPP;
1270         /*
1271          * Only one module will provide an attribute with a given name.
1272          */
1273         hlist_for_each_entry(hp, &security_hook_heads.inode_getsecurity, list) {
1274                 rc = hp->hook.inode_getsecurity(inode, name, buffer, alloc);
1275                 if (rc != -EOPNOTSUPP)
1276                         return rc;
1277         }
1278         return -EOPNOTSUPP;
1279 }
1280
1281 int security_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags)
1282 {
1283         struct security_hook_list *hp;
1284         int rc;
1285
1286         if (unlikely(IS_PRIVATE(inode)))
1287                 return -EOPNOTSUPP;
1288         /*
1289          * Only one module will provide an attribute with a given name.
1290          */
1291         hlist_for_each_entry(hp, &security_hook_heads.inode_setsecurity, list) {
1292                 rc = hp->hook.inode_setsecurity(inode, name, value, size,
1293                                                                 flags);
1294                 if (rc != -EOPNOTSUPP)
1295                         return rc;
1296         }
1297         return -EOPNOTSUPP;
1298 }
1299
1300 int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size)
1301 {
1302         if (unlikely(IS_PRIVATE(inode)))
1303                 return 0;
1304         return call_int_hook(inode_listsecurity, 0, inode, buffer, buffer_size);
1305 }
1306 EXPORT_SYMBOL(security_inode_listsecurity);
1307
1308 void security_inode_getsecid(struct inode *inode, u32 *secid)
1309 {
1310         call_void_hook(inode_getsecid, inode, secid);
1311 }
1312
1313 int security_inode_copy_up(struct dentry *src, struct cred **new)
1314 {
1315         return call_int_hook(inode_copy_up, 0, src, new);
1316 }
1317 EXPORT_SYMBOL(security_inode_copy_up);
1318
1319 int security_inode_copy_up_xattr(const char *name)
1320 {
1321         return call_int_hook(inode_copy_up_xattr, -EOPNOTSUPP, name);
1322 }
1323 EXPORT_SYMBOL(security_inode_copy_up_xattr);
1324
1325 int security_kernfs_init_security(struct kernfs_node *kn_dir,
1326                                   struct kernfs_node *kn)
1327 {
1328         return call_int_hook(kernfs_init_security, 0, kn_dir, kn);
1329 }
1330
1331 int security_file_permission(struct file *file, int mask)
1332 {
1333         int ret;
1334
1335         ret = call_int_hook(file_permission, 0, file, mask);
1336         if (ret)
1337                 return ret;
1338
1339         return fsnotify_perm(file, mask);
1340 }
1341
1342 int security_file_alloc(struct file *file)
1343 {
1344         int rc = lsm_file_alloc(file);
1345
1346         if (rc)
1347                 return rc;
1348         rc = call_int_hook(file_alloc_security, 0, file);
1349         if (unlikely(rc))
1350                 security_file_free(file);
1351         return rc;
1352 }
1353
1354 void security_file_free(struct file *file)
1355 {
1356         void *blob;
1357
1358         call_void_hook(file_free_security, file);
1359
1360         blob = file->f_security;
1361         if (blob) {
1362                 file->f_security = NULL;
1363                 kmem_cache_free(lsm_file_cache, blob);
1364         }
1365 }
1366
1367 int security_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1368 {
1369         return call_int_hook(file_ioctl, 0, file, cmd, arg);
1370 }
1371
1372 static inline unsigned long mmap_prot(struct file *file, unsigned long prot)
1373 {
1374         /*
1375          * Does we have PROT_READ and does the application expect
1376          * it to imply PROT_EXEC?  If not, nothing to talk about...
1377          */
1378         if ((prot & (PROT_READ | PROT_EXEC)) != PROT_READ)
1379                 return prot;
1380         if (!(current->personality & READ_IMPLIES_EXEC))
1381                 return prot;
1382         /*
1383          * if that's an anonymous mapping, let it.
1384          */
1385         if (!file)
1386                 return prot | PROT_EXEC;
1387         /*
1388          * ditto if it's not on noexec mount, except that on !MMU we need
1389          * NOMMU_MAP_EXEC (== VM_MAYEXEC) in this case
1390          */
1391         if (!path_noexec(&file->f_path)) {
1392 #ifndef CONFIG_MMU
1393                 if (file->f_op->mmap_capabilities) {
1394                         unsigned caps = file->f_op->mmap_capabilities(file);
1395                         if (!(caps & NOMMU_MAP_EXEC))
1396                                 return prot;
1397                 }
1398 #endif
1399                 return prot | PROT_EXEC;
1400         }
1401         /* anything on noexec mount won't get PROT_EXEC */
1402         return prot;
1403 }
1404
1405 int security_mmap_file(struct file *file, unsigned long prot,
1406                         unsigned long flags)
1407 {
1408         int ret;
1409         ret = call_int_hook(mmap_file, 0, file, prot,
1410                                         mmap_prot(file, prot), flags);
1411         if (ret)
1412                 return ret;
1413         return ima_file_mmap(file, prot);
1414 }
1415
1416 int security_mmap_addr(unsigned long addr)
1417 {
1418         return call_int_hook(mmap_addr, 0, addr);
1419 }
1420
1421 int security_file_mprotect(struct vm_area_struct *vma, unsigned long reqprot,
1422                             unsigned long prot)
1423 {
1424         return call_int_hook(file_mprotect, 0, vma, reqprot, prot);
1425 }
1426
1427 int security_file_lock(struct file *file, unsigned int cmd)
1428 {
1429         return call_int_hook(file_lock, 0, file, cmd);
1430 }
1431
1432 int security_file_fcntl(struct file *file, unsigned int cmd, unsigned long arg)
1433 {
1434         return call_int_hook(file_fcntl, 0, file, cmd, arg);
1435 }
1436
1437 void security_file_set_fowner(struct file *file)
1438 {
1439         call_void_hook(file_set_fowner, file);
1440 }
1441
1442 int security_file_send_sigiotask(struct task_struct *tsk,
1443                                   struct fown_struct *fown, int sig)
1444 {
1445         return call_int_hook(file_send_sigiotask, 0, tsk, fown, sig);
1446 }
1447
1448 int security_file_receive(struct file *file)
1449 {
1450         return call_int_hook(file_receive, 0, file);
1451 }
1452
1453 int security_file_open(struct file *file)
1454 {
1455         int ret;
1456
1457         ret = call_int_hook(file_open, 0, file);
1458         if (ret)
1459                 return ret;
1460
1461         return fsnotify_perm(file, MAY_OPEN);
1462 }
1463
1464 int security_task_alloc(struct task_struct *task, unsigned long clone_flags)
1465 {
1466         int rc = lsm_task_alloc(task);
1467
1468         if (rc)
1469                 return rc;
1470         rc = call_int_hook(task_alloc, 0, task, clone_flags);
1471         if (unlikely(rc))
1472                 security_task_free(task);
1473         return rc;
1474 }
1475
1476 void security_task_free(struct task_struct *task)
1477 {
1478         call_void_hook(task_free, task);
1479
1480         kfree(task->security);
1481         task->security = NULL;
1482 }
1483
1484 int security_cred_alloc_blank(struct cred *cred, gfp_t gfp)
1485 {
1486         int rc = lsm_cred_alloc(cred, gfp);
1487
1488         if (rc)
1489                 return rc;
1490
1491         rc = call_int_hook(cred_alloc_blank, 0, cred, gfp);
1492         if (unlikely(rc))
1493                 security_cred_free(cred);
1494         return rc;
1495 }
1496
1497 void security_cred_free(struct cred *cred)
1498 {
1499         /*
1500          * There is a failure case in prepare_creds() that
1501          * may result in a call here with ->security being NULL.
1502          */
1503         if (unlikely(cred->security == NULL))
1504                 return;
1505
1506         call_void_hook(cred_free, cred);
1507
1508         kfree(cred->security);
1509         cred->security = NULL;
1510 }
1511
1512 int security_prepare_creds(struct cred *new, const struct cred *old, gfp_t gfp)
1513 {
1514         int rc = lsm_cred_alloc(new, gfp);
1515
1516         if (rc)
1517                 return rc;
1518
1519         rc = call_int_hook(cred_prepare, 0, new, old, gfp);
1520         if (unlikely(rc))
1521                 security_cred_free(new);
1522         return rc;
1523 }
1524
1525 void security_transfer_creds(struct cred *new, const struct cred *old)
1526 {
1527         call_void_hook(cred_transfer, new, old);
1528 }
1529
1530 void security_cred_getsecid(const struct cred *c, u32 *secid)
1531 {
1532         *secid = 0;
1533         call_void_hook(cred_getsecid, c, secid);
1534 }
1535 EXPORT_SYMBOL(security_cred_getsecid);
1536
1537 int security_kernel_act_as(struct cred *new, u32 secid)
1538 {
1539         return call_int_hook(kernel_act_as, 0, new, secid);
1540 }
1541
1542 int security_kernel_create_files_as(struct cred *new, struct inode *inode)
1543 {
1544         return call_int_hook(kernel_create_files_as, 0, new, inode);
1545 }
1546
1547 int security_kernel_module_request(char *kmod_name)
1548 {
1549         int ret;
1550
1551         ret = call_int_hook(kernel_module_request, 0, kmod_name);
1552         if (ret)
1553                 return ret;
1554         return integrity_kernel_module_request(kmod_name);
1555 }
1556
1557 int security_kernel_read_file(struct file *file, enum kernel_read_file_id id)
1558 {
1559         int ret;
1560
1561         ret = call_int_hook(kernel_read_file, 0, file, id);
1562         if (ret)
1563                 return ret;
1564         return ima_read_file(file, id);
1565 }
1566 EXPORT_SYMBOL_GPL(security_kernel_read_file);
1567
1568 int security_kernel_post_read_file(struct file *file, char *buf, loff_t size,
1569                                    enum kernel_read_file_id id)
1570 {
1571         int ret;
1572
1573         ret = call_int_hook(kernel_post_read_file, 0, file, buf, size, id);
1574         if (ret)
1575                 return ret;
1576         return ima_post_read_file(file, buf, size, id);
1577 }
1578 EXPORT_SYMBOL_GPL(security_kernel_post_read_file);
1579
1580 int security_kernel_load_data(enum kernel_load_data_id id)
1581 {
1582         int ret;
1583
1584         ret = call_int_hook(kernel_load_data, 0, id);
1585         if (ret)
1586                 return ret;
1587         return ima_load_data(id);
1588 }
1589 EXPORT_SYMBOL_GPL(security_kernel_load_data);
1590
1591 int security_task_fix_setuid(struct cred *new, const struct cred *old,
1592                              int flags)
1593 {
1594         return call_int_hook(task_fix_setuid, 0, new, old, flags);
1595 }
1596
1597 int security_task_setpgid(struct task_struct *p, pid_t pgid)
1598 {
1599         return call_int_hook(task_setpgid, 0, p, pgid);
1600 }
1601
1602 int security_task_getpgid(struct task_struct *p)
1603 {
1604         return call_int_hook(task_getpgid, 0, p);
1605 }
1606
1607 int security_task_getsid(struct task_struct *p)
1608 {
1609         return call_int_hook(task_getsid, 0, p);
1610 }
1611
1612 void security_task_getsecid(struct task_struct *p, u32 *secid)
1613 {
1614         *secid = 0;
1615         call_void_hook(task_getsecid, p, secid);
1616 }
1617 EXPORT_SYMBOL(security_task_getsecid);
1618
1619 int security_task_setnice(struct task_struct *p, int nice)
1620 {
1621         return call_int_hook(task_setnice, 0, p, nice);
1622 }
1623
1624 int security_task_setioprio(struct task_struct *p, int ioprio)
1625 {
1626         return call_int_hook(task_setioprio, 0, p, ioprio);
1627 }
1628
1629 int security_task_getioprio(struct task_struct *p)
1630 {
1631         return call_int_hook(task_getioprio, 0, p);
1632 }
1633
1634 int security_task_prlimit(const struct cred *cred, const struct cred *tcred,
1635                           unsigned int flags)
1636 {
1637         return call_int_hook(task_prlimit, 0, cred, tcred, flags);
1638 }
1639
1640 int security_task_setrlimit(struct task_struct *p, unsigned int resource,
1641                 struct rlimit *new_rlim)
1642 {
1643         return call_int_hook(task_setrlimit, 0, p, resource, new_rlim);
1644 }
1645
1646 int security_task_setscheduler(struct task_struct *p)
1647 {
1648         return call_int_hook(task_setscheduler, 0, p);
1649 }
1650
1651 int security_task_getscheduler(struct task_struct *p)
1652 {
1653         return call_int_hook(task_getscheduler, 0, p);
1654 }
1655
1656 int security_task_movememory(struct task_struct *p)
1657 {
1658         return call_int_hook(task_movememory, 0, p);
1659 }
1660
1661 int security_task_kill(struct task_struct *p, struct kernel_siginfo *info,
1662                         int sig, const struct cred *cred)
1663 {
1664         return call_int_hook(task_kill, 0, p, info, sig, cred);
1665 }
1666
1667 int security_task_prctl(int option, unsigned long arg2, unsigned long arg3,
1668                          unsigned long arg4, unsigned long arg5)
1669 {
1670         int thisrc;
1671         int rc = -ENOSYS;
1672         struct security_hook_list *hp;
1673
1674         hlist_for_each_entry(hp, &security_hook_heads.task_prctl, list) {
1675                 thisrc = hp->hook.task_prctl(option, arg2, arg3, arg4, arg5);
1676                 if (thisrc != -ENOSYS) {
1677                         rc = thisrc;
1678                         if (thisrc != 0)
1679                                 break;
1680                 }
1681         }
1682         return rc;
1683 }
1684
1685 void security_task_to_inode(struct task_struct *p, struct inode *inode)
1686 {
1687         call_void_hook(task_to_inode, p, inode);
1688 }
1689
1690 int security_ipc_permission(struct kern_ipc_perm *ipcp, short flag)
1691 {
1692         return call_int_hook(ipc_permission, 0, ipcp, flag);
1693 }
1694
1695 void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid)
1696 {
1697         *secid = 0;
1698         call_void_hook(ipc_getsecid, ipcp, secid);
1699 }
1700
1701 int security_msg_msg_alloc(struct msg_msg *msg)
1702 {
1703         int rc = lsm_msg_msg_alloc(msg);
1704
1705         if (unlikely(rc))
1706                 return rc;
1707         rc = call_int_hook(msg_msg_alloc_security, 0, msg);
1708         if (unlikely(rc))
1709                 security_msg_msg_free(msg);
1710         return rc;
1711 }
1712
1713 void security_msg_msg_free(struct msg_msg *msg)
1714 {
1715         call_void_hook(msg_msg_free_security, msg);
1716         kfree(msg->security);
1717         msg->security = NULL;
1718 }
1719
1720 int security_msg_queue_alloc(struct kern_ipc_perm *msq)
1721 {
1722         int rc = lsm_ipc_alloc(msq);
1723
1724         if (unlikely(rc))
1725                 return rc;
1726         rc = call_int_hook(msg_queue_alloc_security, 0, msq);
1727         if (unlikely(rc))
1728                 security_msg_queue_free(msq);
1729         return rc;
1730 }
1731
1732 void security_msg_queue_free(struct kern_ipc_perm *msq)
1733 {
1734         call_void_hook(msg_queue_free_security, msq);
1735         kfree(msq->security);
1736         msq->security = NULL;
1737 }
1738
1739 int security_msg_queue_associate(struct kern_ipc_perm *msq, int msqflg)
1740 {
1741         return call_int_hook(msg_queue_associate, 0, msq, msqflg);
1742 }
1743
1744 int security_msg_queue_msgctl(struct kern_ipc_perm *msq, int cmd)
1745 {
1746         return call_int_hook(msg_queue_msgctl, 0, msq, cmd);
1747 }
1748
1749 int security_msg_queue_msgsnd(struct kern_ipc_perm *msq,
1750                                struct msg_msg *msg, int msqflg)
1751 {
1752         return call_int_hook(msg_queue_msgsnd, 0, msq, msg, msqflg);
1753 }
1754
1755 int security_msg_queue_msgrcv(struct kern_ipc_perm *msq, struct msg_msg *msg,
1756                                struct task_struct *target, long type, int mode)
1757 {
1758         return call_int_hook(msg_queue_msgrcv, 0, msq, msg, target, type, mode);
1759 }
1760
1761 int security_shm_alloc(struct kern_ipc_perm *shp)
1762 {
1763         int rc = lsm_ipc_alloc(shp);
1764
1765         if (unlikely(rc))
1766                 return rc;
1767         rc = call_int_hook(shm_alloc_security, 0, shp);
1768         if (unlikely(rc))
1769                 security_shm_free(shp);
1770         return rc;
1771 }
1772
1773 void security_shm_free(struct kern_ipc_perm *shp)
1774 {
1775         call_void_hook(shm_free_security, shp);
1776         kfree(shp->security);
1777         shp->security = NULL;
1778 }
1779
1780 int security_shm_associate(struct kern_ipc_perm *shp, int shmflg)
1781 {
1782         return call_int_hook(shm_associate, 0, shp, shmflg);
1783 }
1784
1785 int security_shm_shmctl(struct kern_ipc_perm *shp, int cmd)
1786 {
1787         return call_int_hook(shm_shmctl, 0, shp, cmd);
1788 }
1789
1790 int security_shm_shmat(struct kern_ipc_perm *shp, char __user *shmaddr, int shmflg)
1791 {
1792         return call_int_hook(shm_shmat, 0, shp, shmaddr, shmflg);
1793 }
1794
1795 int security_sem_alloc(struct kern_ipc_perm *sma)
1796 {
1797         int rc = lsm_ipc_alloc(sma);
1798
1799         if (unlikely(rc))
1800                 return rc;
1801         rc = call_int_hook(sem_alloc_security, 0, sma);
1802         if (unlikely(rc))
1803                 security_sem_free(sma);
1804         return rc;
1805 }
1806
1807 void security_sem_free(struct kern_ipc_perm *sma)
1808 {
1809         call_void_hook(sem_free_security, sma);
1810         kfree(sma->security);
1811         sma->security = NULL;
1812 }
1813
1814 int security_sem_associate(struct kern_ipc_perm *sma, int semflg)
1815 {
1816         return call_int_hook(sem_associate, 0, sma, semflg);
1817 }
1818
1819 int security_sem_semctl(struct kern_ipc_perm *sma, int cmd)
1820 {
1821         return call_int_hook(sem_semctl, 0, sma, cmd);
1822 }
1823
1824 int security_sem_semop(struct kern_ipc_perm *sma, struct sembuf *sops,
1825                         unsigned nsops, int alter)
1826 {
1827         return call_int_hook(sem_semop, 0, sma, sops, nsops, alter);
1828 }
1829
1830 void security_d_instantiate(struct dentry *dentry, struct inode *inode)
1831 {
1832         if (unlikely(inode && IS_PRIVATE(inode)))
1833                 return;
1834         call_void_hook(d_instantiate, dentry, inode);
1835 }
1836 EXPORT_SYMBOL(security_d_instantiate);
1837
1838 int security_getprocattr(struct task_struct *p, const char *lsm, char *name,
1839                                 char **value)
1840 {
1841         struct security_hook_list *hp;
1842
1843         hlist_for_each_entry(hp, &security_hook_heads.getprocattr, list) {
1844                 if (lsm != NULL && strcmp(lsm, hp->lsm))
1845                         continue;
1846                 return hp->hook.getprocattr(p, name, value);
1847         }
1848         return -EINVAL;
1849 }
1850
1851 int security_setprocattr(const char *lsm, const char *name, void *value,
1852                          size_t size)
1853 {
1854         struct security_hook_list *hp;
1855
1856         hlist_for_each_entry(hp, &security_hook_heads.setprocattr, list) {
1857                 if (lsm != NULL && strcmp(lsm, hp->lsm))
1858                         continue;
1859                 return hp->hook.setprocattr(name, value, size);
1860         }
1861         return -EINVAL;
1862 }
1863
1864 int security_netlink_send(struct sock *sk, struct sk_buff *skb)
1865 {
1866         return call_int_hook(netlink_send, 0, sk, skb);
1867 }
1868
1869 int security_ismaclabel(const char *name)
1870 {
1871         return call_int_hook(ismaclabel, 0, name);
1872 }
1873 EXPORT_SYMBOL(security_ismaclabel);
1874
1875 int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
1876 {
1877         return call_int_hook(secid_to_secctx, -EOPNOTSUPP, secid, secdata,
1878                                 seclen);
1879 }
1880 EXPORT_SYMBOL(security_secid_to_secctx);
1881
1882 int security_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid)
1883 {
1884         *secid = 0;
1885         return call_int_hook(secctx_to_secid, 0, secdata, seclen, secid);
1886 }
1887 EXPORT_SYMBOL(security_secctx_to_secid);
1888
1889 void security_release_secctx(char *secdata, u32 seclen)
1890 {
1891         call_void_hook(release_secctx, secdata, seclen);
1892 }
1893 EXPORT_SYMBOL(security_release_secctx);
1894
1895 void security_inode_invalidate_secctx(struct inode *inode)
1896 {
1897         call_void_hook(inode_invalidate_secctx, inode);
1898 }
1899 EXPORT_SYMBOL(security_inode_invalidate_secctx);
1900
1901 int security_inode_notifysecctx(struct inode *inode, void *ctx, u32 ctxlen)
1902 {
1903         return call_int_hook(inode_notifysecctx, 0, inode, ctx, ctxlen);
1904 }
1905 EXPORT_SYMBOL(security_inode_notifysecctx);
1906
1907 int security_inode_setsecctx(struct dentry *dentry, void *ctx, u32 ctxlen)
1908 {
1909         return call_int_hook(inode_setsecctx, 0, dentry, ctx, ctxlen);
1910 }
1911 EXPORT_SYMBOL(security_inode_setsecctx);
1912
1913 int security_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen)
1914 {
1915         return call_int_hook(inode_getsecctx, -EOPNOTSUPP, inode, ctx, ctxlen);
1916 }
1917 EXPORT_SYMBOL(security_inode_getsecctx);
1918
1919 #ifdef CONFIG_SECURITY_NETWORK
1920
1921 int security_unix_stream_connect(struct sock *sock, struct sock *other, struct sock *newsk)
1922 {
1923         return call_int_hook(unix_stream_connect, 0, sock, other, newsk);
1924 }
1925 EXPORT_SYMBOL(security_unix_stream_connect);
1926
1927 int security_unix_may_send(struct socket *sock,  struct socket *other)
1928 {
1929         return call_int_hook(unix_may_send, 0, sock, other);
1930 }
1931 EXPORT_SYMBOL(security_unix_may_send);
1932
1933 int security_socket_create(int family, int type, int protocol, int kern)
1934 {
1935         return call_int_hook(socket_create, 0, family, type, protocol, kern);
1936 }
1937
1938 int security_socket_post_create(struct socket *sock, int family,
1939                                 int type, int protocol, int kern)
1940 {
1941         return call_int_hook(socket_post_create, 0, sock, family, type,
1942                                                 protocol, kern);
1943 }
1944
1945 int security_socket_socketpair(struct socket *socka, struct socket *sockb)
1946 {
1947         return call_int_hook(socket_socketpair, 0, socka, sockb);
1948 }
1949 EXPORT_SYMBOL(security_socket_socketpair);
1950
1951 int security_socket_bind(struct socket *sock, struct sockaddr *address, int addrlen)
1952 {
1953         return call_int_hook(socket_bind, 0, sock, address, addrlen);
1954 }
1955
1956 int security_socket_connect(struct socket *sock, struct sockaddr *address, int addrlen)
1957 {
1958         return call_int_hook(socket_connect, 0, sock, address, addrlen);
1959 }
1960
1961 int security_socket_listen(struct socket *sock, int backlog)
1962 {
1963         return call_int_hook(socket_listen, 0, sock, backlog);
1964 }
1965
1966 int security_socket_accept(struct socket *sock, struct socket *newsock)
1967 {
1968         return call_int_hook(socket_accept, 0, sock, newsock);
1969 }
1970
1971 int security_socket_sendmsg(struct socket *sock, struct msghdr *msg, int size)
1972 {
1973         return call_int_hook(socket_sendmsg, 0, sock, msg, size);
1974 }
1975
1976 int security_socket_recvmsg(struct socket *sock, struct msghdr *msg,
1977                             int size, int flags)
1978 {
1979         return call_int_hook(socket_recvmsg, 0, sock, msg, size, flags);
1980 }
1981
1982 int security_socket_getsockname(struct socket *sock)
1983 {
1984         return call_int_hook(socket_getsockname, 0, sock);
1985 }
1986
1987 int security_socket_getpeername(struct socket *sock)
1988 {
1989         return call_int_hook(socket_getpeername, 0, sock);
1990 }
1991
1992 int security_socket_getsockopt(struct socket *sock, int level, int optname)
1993 {
1994         return call_int_hook(socket_getsockopt, 0, sock, level, optname);
1995 }
1996
1997 int security_socket_setsockopt(struct socket *sock, int level, int optname)
1998 {
1999         return call_int_hook(socket_setsockopt, 0, sock, level, optname);
2000 }
2001
2002 int security_socket_shutdown(struct socket *sock, int how)
2003 {
2004         return call_int_hook(socket_shutdown, 0, sock, how);
2005 }
2006
2007 int security_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
2008 {
2009         return call_int_hook(socket_sock_rcv_skb, 0, sk, skb);
2010 }
2011 EXPORT_SYMBOL(security_sock_rcv_skb);
2012
2013 int security_socket_getpeersec_stream(struct socket *sock, char __user *optval,
2014                                       int __user *optlen, unsigned len)
2015 {
2016         return call_int_hook(socket_getpeersec_stream, -ENOPROTOOPT, sock,
2017                                 optval, optlen, len);
2018 }
2019
2020 int security_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb, u32 *secid)
2021 {
2022         return call_int_hook(socket_getpeersec_dgram, -ENOPROTOOPT, sock,
2023                              skb, secid);
2024 }
2025 EXPORT_SYMBOL(security_socket_getpeersec_dgram);
2026
2027 int security_sk_alloc(struct sock *sk, int family, gfp_t priority)
2028 {
2029         return call_int_hook(sk_alloc_security, 0, sk, family, priority);
2030 }
2031
2032 void security_sk_free(struct sock *sk)
2033 {
2034         call_void_hook(sk_free_security, sk);
2035 }
2036
2037 void security_sk_clone(const struct sock *sk, struct sock *newsk)
2038 {
2039         call_void_hook(sk_clone_security, sk, newsk);
2040 }
2041 EXPORT_SYMBOL(security_sk_clone);
2042
2043 void security_sk_classify_flow(struct sock *sk, struct flowi *fl)
2044 {
2045         call_void_hook(sk_getsecid, sk, &fl->flowi_secid);
2046 }
2047 EXPORT_SYMBOL(security_sk_classify_flow);
2048
2049 void security_req_classify_flow(const struct request_sock *req, struct flowi *fl)
2050 {
2051         call_void_hook(req_classify_flow, req, fl);
2052 }
2053 EXPORT_SYMBOL(security_req_classify_flow);
2054
2055 void security_sock_graft(struct sock *sk, struct socket *parent)
2056 {
2057         call_void_hook(sock_graft, sk, parent);
2058 }
2059 EXPORT_SYMBOL(security_sock_graft);
2060
2061 int security_inet_conn_request(struct sock *sk,
2062                         struct sk_buff *skb, struct request_sock *req)
2063 {
2064         return call_int_hook(inet_conn_request, 0, sk, skb, req);
2065 }
2066 EXPORT_SYMBOL(security_inet_conn_request);
2067
2068 void security_inet_csk_clone(struct sock *newsk,
2069                         const struct request_sock *req)
2070 {
2071         call_void_hook(inet_csk_clone, newsk, req);
2072 }
2073
2074 void security_inet_conn_established(struct sock *sk,
2075                         struct sk_buff *skb)
2076 {
2077         call_void_hook(inet_conn_established, sk, skb);
2078 }
2079 EXPORT_SYMBOL(security_inet_conn_established);
2080
2081 int security_secmark_relabel_packet(u32 secid)
2082 {
2083         return call_int_hook(secmark_relabel_packet, 0, secid);
2084 }
2085 EXPORT_SYMBOL(security_secmark_relabel_packet);
2086
2087 void security_secmark_refcount_inc(void)
2088 {
2089         call_void_hook(secmark_refcount_inc);
2090 }
2091 EXPORT_SYMBOL(security_secmark_refcount_inc);
2092
2093 void security_secmark_refcount_dec(void)
2094 {
2095         call_void_hook(secmark_refcount_dec);
2096 }
2097 EXPORT_SYMBOL(security_secmark_refcount_dec);
2098
2099 int security_tun_dev_alloc_security(void **security)
2100 {
2101         return call_int_hook(tun_dev_alloc_security, 0, security);
2102 }
2103 EXPORT_SYMBOL(security_tun_dev_alloc_security);
2104
2105 void security_tun_dev_free_security(void *security)
2106 {
2107         call_void_hook(tun_dev_free_security, security);
2108 }
2109 EXPORT_SYMBOL(security_tun_dev_free_security);
2110
2111 int security_tun_dev_create(void)
2112 {
2113         return call_int_hook(tun_dev_create, 0);
2114 }
2115 EXPORT_SYMBOL(security_tun_dev_create);
2116
2117 int security_tun_dev_attach_queue(void *security)
2118 {
2119         return call_int_hook(tun_dev_attach_queue, 0, security);
2120 }
2121 EXPORT_SYMBOL(security_tun_dev_attach_queue);
2122
2123 int security_tun_dev_attach(struct sock *sk, void *security)
2124 {
2125         return call_int_hook(tun_dev_attach, 0, sk, security);
2126 }
2127 EXPORT_SYMBOL(security_tun_dev_attach);
2128
2129 int security_tun_dev_open(void *security)
2130 {
2131         return call_int_hook(tun_dev_open, 0, security);
2132 }
2133 EXPORT_SYMBOL(security_tun_dev_open);
2134
2135 int security_sctp_assoc_request(struct sctp_endpoint *ep, struct sk_buff *skb)
2136 {
2137         return call_int_hook(sctp_assoc_request, 0, ep, skb);
2138 }
2139 EXPORT_SYMBOL(security_sctp_assoc_request);
2140
2141 int security_sctp_bind_connect(struct sock *sk, int optname,
2142                                struct sockaddr *address, int addrlen)
2143 {
2144         return call_int_hook(sctp_bind_connect, 0, sk, optname,
2145                              address, addrlen);
2146 }
2147 EXPORT_SYMBOL(security_sctp_bind_connect);
2148
2149 void security_sctp_sk_clone(struct sctp_endpoint *ep, struct sock *sk,
2150                             struct sock *newsk)
2151 {
2152         call_void_hook(sctp_sk_clone, ep, sk, newsk);
2153 }
2154 EXPORT_SYMBOL(security_sctp_sk_clone);
2155
2156 #endif  /* CONFIG_SECURITY_NETWORK */
2157
2158 #ifdef CONFIG_SECURITY_INFINIBAND
2159
2160 int security_ib_pkey_access(void *sec, u64 subnet_prefix, u16 pkey)
2161 {
2162         return call_int_hook(ib_pkey_access, 0, sec, subnet_prefix, pkey);
2163 }
2164 EXPORT_SYMBOL(security_ib_pkey_access);
2165
2166 int security_ib_endport_manage_subnet(void *sec, const char *dev_name, u8 port_num)
2167 {
2168         return call_int_hook(ib_endport_manage_subnet, 0, sec, dev_name, port_num);
2169 }
2170 EXPORT_SYMBOL(security_ib_endport_manage_subnet);
2171
2172 int security_ib_alloc_security(void **sec)
2173 {
2174         return call_int_hook(ib_alloc_security, 0, sec);
2175 }
2176 EXPORT_SYMBOL(security_ib_alloc_security);
2177
2178 void security_ib_free_security(void *sec)
2179 {
2180         call_void_hook(ib_free_security, sec);
2181 }
2182 EXPORT_SYMBOL(security_ib_free_security);
2183 #endif  /* CONFIG_SECURITY_INFINIBAND */
2184
2185 #ifdef CONFIG_SECURITY_NETWORK_XFRM
2186
2187 int security_xfrm_policy_alloc(struct xfrm_sec_ctx **ctxp,
2188                                struct xfrm_user_sec_ctx *sec_ctx,
2189                                gfp_t gfp)
2190 {
2191         return call_int_hook(xfrm_policy_alloc_security, 0, ctxp, sec_ctx, gfp);
2192 }
2193 EXPORT_SYMBOL(security_xfrm_policy_alloc);
2194
2195 int security_xfrm_policy_clone(struct xfrm_sec_ctx *old_ctx,
2196                               struct xfrm_sec_ctx **new_ctxp)
2197 {
2198         return call_int_hook(xfrm_policy_clone_security, 0, old_ctx, new_ctxp);
2199 }
2200
2201 void security_xfrm_policy_free(struct xfrm_sec_ctx *ctx)
2202 {
2203         call_void_hook(xfrm_policy_free_security, ctx);
2204 }
2205 EXPORT_SYMBOL(security_xfrm_policy_free);
2206
2207 int security_xfrm_policy_delete(struct xfrm_sec_ctx *ctx)
2208 {
2209         return call_int_hook(xfrm_policy_delete_security, 0, ctx);
2210 }
2211
2212 int security_xfrm_state_alloc(struct xfrm_state *x,
2213                               struct xfrm_user_sec_ctx *sec_ctx)
2214 {
2215         return call_int_hook(xfrm_state_alloc, 0, x, sec_ctx);
2216 }
2217 EXPORT_SYMBOL(security_xfrm_state_alloc);
2218
2219 int security_xfrm_state_alloc_acquire(struct xfrm_state *x,
2220                                       struct xfrm_sec_ctx *polsec, u32 secid)
2221 {
2222         return call_int_hook(xfrm_state_alloc_acquire, 0, x, polsec, secid);
2223 }
2224
2225 int security_xfrm_state_delete(struct xfrm_state *x)
2226 {
2227         return call_int_hook(xfrm_state_delete_security, 0, x);
2228 }
2229 EXPORT_SYMBOL(security_xfrm_state_delete);
2230
2231 void security_xfrm_state_free(struct xfrm_state *x)
2232 {
2233         call_void_hook(xfrm_state_free_security, x);
2234 }
2235
2236 int security_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir)
2237 {
2238         return call_int_hook(xfrm_policy_lookup, 0, ctx, fl_secid, dir);
2239 }
2240
2241 int security_xfrm_state_pol_flow_match(struct xfrm_state *x,
2242                                        struct xfrm_policy *xp,
2243                                        const struct flowi *fl)
2244 {
2245         struct security_hook_list *hp;
2246         int rc = 1;
2247
2248         /*
2249          * Since this function is expected to return 0 or 1, the judgment
2250          * becomes difficult if multiple LSMs supply this call. Fortunately,
2251          * we can use the first LSM's judgment because currently only SELinux
2252          * supplies this call.
2253          *
2254          * For speed optimization, we explicitly break the loop rather than
2255          * using the macro
2256          */
2257         hlist_for_each_entry(hp, &security_hook_heads.xfrm_state_pol_flow_match,
2258                                 list) {
2259                 rc = hp->hook.xfrm_state_pol_flow_match(x, xp, fl);
2260                 break;
2261         }
2262         return rc;
2263 }
2264
2265 int security_xfrm_decode_session(struct sk_buff *skb, u32 *secid)
2266 {
2267         return call_int_hook(xfrm_decode_session, 0, skb, secid, 1);
2268 }
2269
2270 void security_skb_classify_flow(struct sk_buff *skb, struct flowi *fl)
2271 {
2272         int rc = call_int_hook(xfrm_decode_session, 0, skb, &fl->flowi_secid,
2273                                 0);
2274
2275         BUG_ON(rc);
2276 }
2277 EXPORT_SYMBOL(security_skb_classify_flow);
2278
2279 #endif  /* CONFIG_SECURITY_NETWORK_XFRM */
2280
2281 #ifdef CONFIG_KEYS
2282
2283 int security_key_alloc(struct key *key, const struct cred *cred,
2284                        unsigned long flags)
2285 {
2286         return call_int_hook(key_alloc, 0, key, cred, flags);
2287 }
2288
2289 void security_key_free(struct key *key)
2290 {
2291         call_void_hook(key_free, key);
2292 }
2293
2294 int security_key_permission(key_ref_t key_ref,
2295                             const struct cred *cred, unsigned perm)
2296 {
2297         return call_int_hook(key_permission, 0, key_ref, cred, perm);
2298 }
2299
2300 int security_key_getsecurity(struct key *key, char **_buffer)
2301 {
2302         *_buffer = NULL;
2303         return call_int_hook(key_getsecurity, 0, key, _buffer);
2304 }
2305
2306 #endif  /* CONFIG_KEYS */
2307
2308 #ifdef CONFIG_AUDIT
2309
2310 int security_audit_rule_init(u32 field, u32 op, char *rulestr, void **lsmrule)
2311 {
2312         return call_int_hook(audit_rule_init, 0, field, op, rulestr, lsmrule);
2313 }
2314
2315 int security_audit_rule_known(struct audit_krule *krule)
2316 {
2317         return call_int_hook(audit_rule_known, 0, krule);
2318 }
2319
2320 void security_audit_rule_free(void *lsmrule)
2321 {
2322         call_void_hook(audit_rule_free, lsmrule);
2323 }
2324
2325 int security_audit_rule_match(u32 secid, u32 field, u32 op, void *lsmrule)
2326 {
2327         return call_int_hook(audit_rule_match, 0, secid, field, op, lsmrule);
2328 }
2329 #endif /* CONFIG_AUDIT */
2330
2331 #ifdef CONFIG_BPF_SYSCALL
2332 int security_bpf(int cmd, union bpf_attr *attr, unsigned int size)
2333 {
2334         return call_int_hook(bpf, 0, cmd, attr, size);
2335 }
2336 int security_bpf_map(struct bpf_map *map, fmode_t fmode)
2337 {
2338         return call_int_hook(bpf_map, 0, map, fmode);
2339 }
2340 int security_bpf_prog(struct bpf_prog *prog)
2341 {
2342         return call_int_hook(bpf_prog, 0, prog);
2343 }
2344 int security_bpf_map_alloc(struct bpf_map *map)
2345 {
2346         return call_int_hook(bpf_map_alloc_security, 0, map);
2347 }
2348 int security_bpf_prog_alloc(struct bpf_prog_aux *aux)
2349 {
2350         return call_int_hook(bpf_prog_alloc_security, 0, aux);
2351 }
2352 void security_bpf_map_free(struct bpf_map *map)
2353 {
2354         call_void_hook(bpf_map_free_security, map);
2355 }
2356 void security_bpf_prog_free(struct bpf_prog_aux *aux)
2357 {
2358         call_void_hook(bpf_prog_free_security, aux);
2359 }
2360 #endif /* CONFIG_BPF_SYSCALL */