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_path_notify(const struct path *path, u64 mask,
 874                                 unsigned int obj_type)
 875 {
 876         return call_int_hook(path_notify, 0, path, mask, obj_type);
 877 }
 878
 879 int security_inode_alloc(struct inode *inode)
 880 {
 881         int rc = lsm_inode_alloc(inode);
 882
 883         if (unlikely(rc))
 884                 return rc;
 885         rc = call_int_hook(inode_alloc_security, 0, inode);
 886         if (unlikely(rc))
 887                 security_inode_free(inode);
 888         return rc;
 889 }
 890
 891 static void inode_free_by_rcu(struct rcu_head *head)
 892 {
 893         /*
 894          * The rcu head is at the start of the inode blob
 895          */
 896         kmem_cache_free(lsm_inode_cache, head);
 897 }
 898
 899 void security_inode_free(struct inode *inode)
 900 {
 901         integrity_inode_free(inode);
 902         call_void_hook(inode_free_security, inode);
 903         /*
 904          * The inode may still be referenced in a path walk and
 905          * a call to security_inode_permission() can be made
 906          * after inode_free_security() is called. Ideally, the VFS
 907          * wouldn't do this, but fixing that is a much harder
 908          * job. For now, simply free the i_security via RCU, and
 909          * leave the current inode->i_security pointer intact.
 910          * The inode will be freed after the RCU grace period too.
 911          */
 912         if (inode->i_security)
 913                 call_rcu((struct rcu_head *)inode->i_security,
 914                                 inode_free_by_rcu);
 915 }
 916
 917 int security_dentry_init_security(struct dentry *dentry, int mode,
 918                                         const struct qstr *name, void **ctx,
 919                                         u32 *ctxlen)
 920 {
 921         return call_int_hook(dentry_init_security, -EOPNOTSUPP, dentry, mode,
 922                                 name, ctx, ctxlen);
 923 }
 924 EXPORT_SYMBOL(security_dentry_init_security);
 925
 926 int security_dentry_create_files_as(struct dentry *dentry, int mode,
 927                                     struct qstr *name,
 928                                     const struct cred *old, struct cred *new)
 929 {
 930         return call_int_hook(dentry_create_files_as, 0, dentry, mode,
 931                                 name, old, new);
 932 }
 933 EXPORT_SYMBOL(security_dentry_create_files_as);
 934
 935 int security_inode_init_security(struct inode *inode, struct inode *dir,
 936                                  const struct qstr *qstr,
 937                                  const initxattrs initxattrs, void *fs_data)
 938 {
 939         struct xattr new_xattrs[MAX_LSM_EVM_XATTR + 1];
 940         struct xattr *lsm_xattr, *evm_xattr, *xattr;
 941         int ret;
 942
 943         if (unlikely(IS_PRIVATE(inode)))
 944                 return 0;
 945
 946         if (!initxattrs)
 947                 return call_int_hook(inode_init_security, -EOPNOTSUPP, inode,
 948                                      dir, qstr, NULL, NULL, NULL);
 949         memset(new_xattrs, 0, sizeof(new_xattrs));
 950         lsm_xattr = new_xattrs;
 951         ret = call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir, qstr,
 952                                                 &lsm_xattr->name,
 953                                                 &lsm_xattr->value,
 954                                                 &lsm_xattr->value_len);
 955         if (ret)
 956                 goto out;
 957
 958         evm_xattr = lsm_xattr + 1;
 959         ret = evm_inode_init_security(inode, lsm_xattr, evm_xattr);
 960         if (ret)
 961                 goto out;
 962         ret = initxattrs(inode, new_xattrs, fs_data);
 963 out:
 964         for (xattr = new_xattrs; xattr->value != NULL; xattr++)
 965                 kfree(xattr->value);
 966         return (ret == -EOPNOTSUPP) ? 0 : ret;
 967 }
 968 EXPORT_SYMBOL(security_inode_init_security);
 969
 970 int security_old_inode_init_security(struct inode *inode, struct inode *dir,
 971                                      const struct qstr *qstr, const char **name,
 972                                      void **value, size_t *len)
 973 {
 974         if (unlikely(IS_PRIVATE(inode)))
 975                 return -EOPNOTSUPP;
 976         return call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir,
 977                              qstr, name, value, len);
 978 }
 979 EXPORT_SYMBOL(security_old_inode_init_security);
 980
 981 #ifdef CONFIG_SECURITY_PATH
 982 int security_path_mknod(const struct path *dir, struct dentry *dentry, umode_t mode,
 983                         unsigned int dev)
 984 {
 985         if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
 986                 return 0;
 987         return call_int_hook(path_mknod, 0, dir, dentry, mode, dev);
 988 }
 989 EXPORT_SYMBOL(security_path_mknod);
 990
 991 int security_path_mkdir(const struct path *dir, struct dentry *dentry, umode_t mode)
 992 {
 993         if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
 994                 return 0;
 995         return call_int_hook(path_mkdir, 0, dir, dentry, mode);
 996 }
 997 EXPORT_SYMBOL(security_path_mkdir);
 998
 999 int security_path_rmdir(const struct path *dir, struct dentry *dentry)
1000 {
1001         if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
1002                 return 0;
1003         return call_int_hook(path_rmdir, 0, dir, dentry);
1004 }
1005
1006 int security_path_unlink(const struct path *dir, struct dentry *dentry)
1007 {
1008         if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
1009                 return 0;
1010         return call_int_hook(path_unlink, 0, dir, dentry);
1011 }
1012 EXPORT_SYMBOL(security_path_unlink);
1013
1014 int security_path_symlink(const struct path *dir, struct dentry *dentry,
1015                           const char *old_name)
1016 {
1017         if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
1018                 return 0;
1019         return call_int_hook(path_symlink, 0, dir, dentry, old_name);
1020 }
1021
1022 int security_path_link(struct dentry *old_dentry, const struct path *new_dir,
1023                        struct dentry *new_dentry)
1024 {
1025         if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry))))
1026                 return 0;
1027         return call_int_hook(path_link, 0, old_dentry, new_dir, new_dentry);
1028 }
1029
1030 int security_path_rename(const struct path *old_dir, struct dentry *old_dentry,
1031                          const struct path *new_dir, struct dentry *new_dentry,
1032                          unsigned int flags)
1033 {
1034         if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) ||
1035                      (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry)))))
1036                 return 0;
1037
1038         if (flags & RENAME_EXCHANGE) {
1039                 int err = call_int_hook(path_rename, 0, new_dir, new_dentry,
1040                                         old_dir, old_dentry);
1041                 if (err)
1042                         return err;
1043         }
1044
1045         return call_int_hook(path_rename, 0, old_dir, old_dentry, new_dir,
1046                                 new_dentry);
1047 }
1048 EXPORT_SYMBOL(security_path_rename);
1049
1050 int security_path_truncate(const struct path *path)
1051 {
1052         if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
1053                 return 0;
1054         return call_int_hook(path_truncate, 0, path);
1055 }
1056
1057 int security_path_chmod(const struct path *path, umode_t mode)
1058 {
1059         if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
1060                 return 0;
1061         return call_int_hook(path_chmod, 0, path, mode);
1062 }
1063
1064 int security_path_chown(const struct path *path, kuid_t uid, kgid_t gid)
1065 {
1066         if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
1067                 return 0;
1068         return call_int_hook(path_chown, 0, path, uid, gid);
1069 }
1070
1071 int security_path_chroot(const struct path *path)
1072 {
1073         return call_int_hook(path_chroot, 0, path);
1074 }
1075 #endif
1076
1077 int security_inode_create(struct inode *dir, struct dentry *dentry, umode_t mode)
1078 {
1079         if (unlikely(IS_PRIVATE(dir)))
1080                 return 0;
1081         return call_int_hook(inode_create, 0, dir, dentry, mode);
1082 }
1083 EXPORT_SYMBOL_GPL(security_inode_create);
1084
1085 int security_inode_link(struct dentry *old_dentry, struct inode *dir,
1086                          struct dentry *new_dentry)
1087 {
1088         if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry))))
1089                 return 0;
1090         return call_int_hook(inode_link, 0, old_dentry, dir, new_dentry);
1091 }
1092
1093 int security_inode_unlink(struct inode *dir, struct dentry *dentry)
1094 {
1095         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1096                 return 0;
1097         return call_int_hook(inode_unlink, 0, dir, dentry);
1098 }
1099
1100 int security_inode_symlink(struct inode *dir, struct dentry *dentry,
1101                             const char *old_name)
1102 {
1103         if (unlikely(IS_PRIVATE(dir)))
1104                 return 0;
1105         return call_int_hook(inode_symlink, 0, dir, dentry, old_name);
1106 }
1107
1108 int security_inode_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
1109 {
1110         if (unlikely(IS_PRIVATE(dir)))
1111                 return 0;
1112         return call_int_hook(inode_mkdir, 0, dir, dentry, mode);
1113 }
1114 EXPORT_SYMBOL_GPL(security_inode_mkdir);
1115
1116 int security_inode_rmdir(struct inode *dir, struct dentry *dentry)
1117 {
1118         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1119                 return 0;
1120         return call_int_hook(inode_rmdir, 0, dir, dentry);
1121 }
1122
1123 int security_inode_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t dev)
1124 {
1125         if (unlikely(IS_PRIVATE(dir)))
1126                 return 0;
1127         return call_int_hook(inode_mknod, 0, dir, dentry, mode, dev);
1128 }
1129
1130 int security_inode_rename(struct inode *old_dir, struct dentry *old_dentry,
1131                            struct inode *new_dir, struct dentry *new_dentry,
1132                            unsigned int flags)
1133 {
1134         if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) ||
1135             (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry)))))
1136                 return 0;
1137
1138         if (flags & RENAME_EXCHANGE) {
1139                 int err = call_int_hook(inode_rename, 0, new_dir, new_dentry,
1140                                                      old_dir, old_dentry);
1141                 if (err)
1142                         return err;
1143         }
1144
1145         return call_int_hook(inode_rename, 0, old_dir, old_dentry,
1146                                            new_dir, new_dentry);
1147 }
1148
1149 int security_inode_readlink(struct dentry *dentry)
1150 {
1151         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1152                 return 0;
1153         return call_int_hook(inode_readlink, 0, dentry);
1154 }
1155
1156 int security_inode_follow_link(struct dentry *dentry, struct inode *inode,
1157                                bool rcu)
1158 {
1159         if (unlikely(IS_PRIVATE(inode)))
1160                 return 0;
1161         return call_int_hook(inode_follow_link, 0, dentry, inode, rcu);
1162 }
1163
1164 int security_inode_permission(struct inode *inode, int mask)
1165 {
1166         if (unlikely(IS_PRIVATE(inode)))
1167                 return 0;
1168         return call_int_hook(inode_permission, 0, inode, mask);
1169 }
1170
1171 int security_inode_setattr(struct dentry *dentry, struct iattr *attr)
1172 {
1173         int ret;
1174
1175         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1176                 return 0;
1177         ret = call_int_hook(inode_setattr, 0, dentry, attr);
1178         if (ret)
1179                 return ret;
1180         return evm_inode_setattr(dentry, attr);
1181 }
1182 EXPORT_SYMBOL_GPL(security_inode_setattr);
1183
1184 int security_inode_getattr(const struct path *path)
1185 {
1186         if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
1187                 return 0;
1188         return call_int_hook(inode_getattr, 0, path);
1189 }
1190
1191 int security_inode_setxattr(struct dentry *dentry, const char *name,
1192                             const void *value, size_t size, int flags)
1193 {
1194         int ret;
1195
1196         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1197                 return 0;
1198         /*
1199          * SELinux and Smack integrate the cap call,
1200          * so assume that all LSMs supplying this call do so.
1201          */
1202         ret = call_int_hook(inode_setxattr, 1, dentry, name, value, size,
1203                                 flags);
1204
1205         if (ret == 1)
1206                 ret = cap_inode_setxattr(dentry, name, value, size, flags);
1207         if (ret)
1208                 return ret;
1209         ret = ima_inode_setxattr(dentry, name, value, size);
1210         if (ret)
1211                 return ret;
1212         return evm_inode_setxattr(dentry, name, value, size);
1213 }
1214
1215 void security_inode_post_setxattr(struct dentry *dentry, const char *name,
1216                                   const void *value, size_t size, int flags)
1217 {
1218         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1219                 return;
1220         call_void_hook(inode_post_setxattr, dentry, name, value, size, flags);
1221         evm_inode_post_setxattr(dentry, name, value, size);
1222 }
1223
1224 int security_inode_getxattr(struct dentry *dentry, const char *name)
1225 {
1226         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1227                 return 0;
1228         return call_int_hook(inode_getxattr, 0, dentry, name);
1229 }
1230
1231 int security_inode_listxattr(struct dentry *dentry)
1232 {
1233         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1234                 return 0;
1235         return call_int_hook(inode_listxattr, 0, dentry);
1236 }
1237
1238 int security_inode_removexattr(struct dentry *dentry, const char *name)
1239 {
1240         int ret;
1241
1242         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1243                 return 0;
1244         /*
1245          * SELinux and Smack integrate the cap call,
1246          * so assume that all LSMs supplying this call do so.
1247          */
1248         ret = call_int_hook(inode_removexattr, 1, dentry, name);
1249         if (ret == 1)
1250                 ret = cap_inode_removexattr(dentry, name);
1251         if (ret)
1252                 return ret;
1253         ret = ima_inode_removexattr(dentry, name);
1254         if (ret)
1255                 return ret;
1256         return evm_inode_removexattr(dentry, name);
1257 }
1258
1259 int security_inode_need_killpriv(struct dentry *dentry)
1260 {
1261         return call_int_hook(inode_need_killpriv, 0, dentry);
1262 }
1263
1264 int security_inode_killpriv(struct dentry *dentry)
1265 {
1266         return call_int_hook(inode_killpriv, 0, dentry);
1267 }
1268
1269 int security_inode_getsecurity(struct inode *inode, const char *name, void **buffer, bool alloc)
1270 {
1271         struct security_hook_list *hp;
1272         int rc;
1273
1274         if (unlikely(IS_PRIVATE(inode)))
1275                 return -EOPNOTSUPP;
1276         /*
1277          * Only one module will provide an attribute with a given name.
1278          */
1279         hlist_for_each_entry(hp, &security_hook_heads.inode_getsecurity, list) {
1280                 rc = hp->hook.inode_getsecurity(inode, name, buffer, alloc);
1281                 if (rc != -EOPNOTSUPP)
1282                         return rc;
1283         }
1284         return -EOPNOTSUPP;
1285 }
1286
1287 int security_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags)
1288 {
1289         struct security_hook_list *hp;
1290         int rc;
1291
1292         if (unlikely(IS_PRIVATE(inode)))
1293                 return -EOPNOTSUPP;
1294         /*
1295          * Only one module will provide an attribute with a given name.
1296          */
1297         hlist_for_each_entry(hp, &security_hook_heads.inode_setsecurity, list) {
1298                 rc = hp->hook.inode_setsecurity(inode, name, value, size,
1299                                                                 flags);
1300                 if (rc != -EOPNOTSUPP)
1301                         return rc;
1302         }
1303         return -EOPNOTSUPP;
1304 }
1305
1306 int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size)
1307 {
1308         if (unlikely(IS_PRIVATE(inode)))
1309                 return 0;
1310         return call_int_hook(inode_listsecurity, 0, inode, buffer, buffer_size);
1311 }
1312 EXPORT_SYMBOL(security_inode_listsecurity);
1313
1314 void security_inode_getsecid(struct inode *inode, u32 *secid)
1315 {
1316         call_void_hook(inode_getsecid, inode, secid);
1317 }
1318
1319 int security_inode_copy_up(struct dentry *src, struct cred **new)
1320 {
1321         return call_int_hook(inode_copy_up, 0, src, new);
1322 }
1323 EXPORT_SYMBOL(security_inode_copy_up);
1324
1325 int security_inode_copy_up_xattr(const char *name)
1326 {
1327         return call_int_hook(inode_copy_up_xattr, -EOPNOTSUPP, name);
1328 }
1329 EXPORT_SYMBOL(security_inode_copy_up_xattr);
1330
1331 int security_kernfs_init_security(struct kernfs_node *kn_dir,
1332                                   struct kernfs_node *kn)
1333 {
1334         return call_int_hook(kernfs_init_security, 0, kn_dir, kn);
1335 }
1336
1337 int security_file_permission(struct file *file, int mask)
1338 {
1339         int ret;
1340
1341         ret = call_int_hook(file_permission, 0, file, mask);
1342         if (ret)
1343                 return ret;
1344
1345         return fsnotify_perm(file, mask);
1346 }
1347
1348 int security_file_alloc(struct file *file)
1349 {
1350         int rc = lsm_file_alloc(file);
1351
1352         if (rc)
1353                 return rc;
1354         rc = call_int_hook(file_alloc_security, 0, file);
1355         if (unlikely(rc))
1356                 security_file_free(file);
1357         return rc;
1358 }
1359
1360 void security_file_free(struct file *file)
1361 {
1362         void *blob;
1363
1364         call_void_hook(file_free_security, file);
1365
1366         blob = file->f_security;
1367         if (blob) {
1368                 file->f_security = NULL;
1369                 kmem_cache_free(lsm_file_cache, blob);
1370         }
1371 }
1372
1373 int security_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1374 {
1375         return call_int_hook(file_ioctl, 0, file, cmd, arg);
1376 }
1377
1378 static inline unsigned long mmap_prot(struct file *file, unsigned long prot)
1379 {
1380         /*
1381          * Does we have PROT_READ and does the application expect
1382          * it to imply PROT_EXEC?  If not, nothing to talk about...
1383          */
1384         if ((prot & (PROT_READ | PROT_EXEC)) != PROT_READ)
1385                 return prot;
1386         if (!(current->personality & READ_IMPLIES_EXEC))
1387                 return prot;
1388         /*
1389          * if that's an anonymous mapping, let it.
1390          */
1391         if (!file)
1392                 return prot | PROT_EXEC;
1393         /*
1394          * ditto if it's not on noexec mount, except that on !MMU we need
1395          * NOMMU_MAP_EXEC (== VM_MAYEXEC) in this case
1396          */
1397         if (!path_noexec(&file->f_path)) {
1398 #ifndef CONFIG_MMU
1399                 if (file->f_op->mmap_capabilities) {
1400                         unsigned caps = file->f_op->mmap_capabilities(file);
1401                         if (!(caps & NOMMU_MAP_EXEC))
1402                                 return prot;
1403                 }
1404 #endif
1405                 return prot | PROT_EXEC;
1406         }
1407         /* anything on noexec mount won't get PROT_EXEC */
1408         return prot;
1409 }
1410
1411 int security_mmap_file(struct file *file, unsigned long prot,
1412                         unsigned long flags)
1413 {
1414         int ret;
1415         ret = call_int_hook(mmap_file, 0, file, prot,
1416                                         mmap_prot(file, prot), flags);
1417         if (ret)
1418                 return ret;
1419         return ima_file_mmap(file, prot);
1420 }
1421
1422 int security_mmap_addr(unsigned long addr)
1423 {
1424         return call_int_hook(mmap_addr, 0, addr);
1425 }
1426
1427 int security_file_mprotect(struct vm_area_struct *vma, unsigned long reqprot,
1428                             unsigned long prot)
1429 {
1430         return call_int_hook(file_mprotect, 0, vma, reqprot, prot);
1431 }
1432
1433 int security_file_lock(struct file *file, unsigned int cmd)
1434 {
1435         return call_int_hook(file_lock, 0, file, cmd);
1436 }
1437
1438 int security_file_fcntl(struct file *file, unsigned int cmd, unsigned long arg)
1439 {
1440         return call_int_hook(file_fcntl, 0, file, cmd, arg);
1441 }
1442
1443 void security_file_set_fowner(struct file *file)
1444 {
1445         call_void_hook(file_set_fowner, file);
1446 }
1447
1448 int security_file_send_sigiotask(struct task_struct *tsk,
1449                                   struct fown_struct *fown, int sig)
1450 {
1451         return call_int_hook(file_send_sigiotask, 0, tsk, fown, sig);
1452 }
1453
1454 int security_file_receive(struct file *file)
1455 {
1456         return call_int_hook(file_receive, 0, file);
1457 }
1458
1459 int security_file_open(struct file *file)
1460 {
1461         int ret;
1462
1463         ret = call_int_hook(file_open, 0, file);
1464         if (ret)
1465                 return ret;
1466
1467         return fsnotify_perm(file, MAY_OPEN);
1468 }
1469
1470 int security_task_alloc(struct task_struct *task, unsigned long clone_flags)
1471 {
1472         int rc = lsm_task_alloc(task);
1473
1474         if (rc)
1475                 return rc;
1476         rc = call_int_hook(task_alloc, 0, task, clone_flags);
1477         if (unlikely(rc))
1478                 security_task_free(task);
1479         return rc;
1480 }
1481
1482 void security_task_free(struct task_struct *task)
1483 {
1484         call_void_hook(task_free, task);
1485
1486         kfree(task->security);
1487         task->security = NULL;
1488 }
1489
1490 int security_cred_alloc_blank(struct cred *cred, gfp_t gfp)
1491 {
1492         int rc = lsm_cred_alloc(cred, gfp);
1493
1494         if (rc)
1495                 return rc;
1496
1497         rc = call_int_hook(cred_alloc_blank, 0, cred, gfp);
1498         if (unlikely(rc))
1499                 security_cred_free(cred);
1500         return rc;
1501 }
1502
1503 void security_cred_free(struct cred *cred)
1504 {
1505         /*
1506          * There is a failure case in prepare_creds() that
1507          * may result in a call here with ->security being NULL.
1508          */
1509         if (unlikely(cred->security == NULL))
1510                 return;
1511
1512         call_void_hook(cred_free, cred);
1513
1514         kfree(cred->security);
1515         cred->security = NULL;
1516 }
1517
1518 int security_prepare_creds(struct cred *new, const struct cred *old, gfp_t gfp)
1519 {
1520         int rc = lsm_cred_alloc(new, gfp);
1521
1522         if (rc)
1523                 return rc;
1524
1525         rc = call_int_hook(cred_prepare, 0, new, old, gfp);
1526         if (unlikely(rc))
1527                 security_cred_free(new);
1528         return rc;
1529 }
1530
1531 void security_transfer_creds(struct cred *new, const struct cred *old)
1532 {
1533         call_void_hook(cred_transfer, new, old);
1534 }
1535
1536 void security_cred_getsecid(const struct cred *c, u32 *secid)
1537 {
1538         *secid = 0;
1539         call_void_hook(cred_getsecid, c, secid);
1540 }
1541 EXPORT_SYMBOL(security_cred_getsecid);
1542
1543 int security_kernel_act_as(struct cred *new, u32 secid)
1544 {
1545         return call_int_hook(kernel_act_as, 0, new, secid);
1546 }
1547
1548 int security_kernel_create_files_as(struct cred *new, struct inode *inode)
1549 {
1550         return call_int_hook(kernel_create_files_as, 0, new, inode);
1551 }
1552
1553 int security_kernel_module_request(char *kmod_name)
1554 {
1555         int ret;
1556
1557         ret = call_int_hook(kernel_module_request, 0, kmod_name);
1558         if (ret)
1559                 return ret;
1560         return integrity_kernel_module_request(kmod_name);
1561 }
1562
1563 int security_kernel_read_file(struct file *file, enum kernel_read_file_id id)
1564 {
1565         int ret;
1566
1567         ret = call_int_hook(kernel_read_file, 0, file, id);
1568         if (ret)
1569                 return ret;
1570         return ima_read_file(file, id);
1571 }
1572 EXPORT_SYMBOL_GPL(security_kernel_read_file);
1573
1574 int security_kernel_post_read_file(struct file *file, char *buf, loff_t size,
1575                                    enum kernel_read_file_id id)
1576 {
1577         int ret;
1578
1579         ret = call_int_hook(kernel_post_read_file, 0, file, buf, size, id);
1580         if (ret)
1581                 return ret;
1582         return ima_post_read_file(file, buf, size, id);
1583 }
1584 EXPORT_SYMBOL_GPL(security_kernel_post_read_file);
1585
1586 int security_kernel_load_data(enum kernel_load_data_id id)
1587 {
1588         int ret;
1589
1590         ret = call_int_hook(kernel_load_data, 0, id);
1591         if (ret)
1592                 return ret;
1593         return ima_load_data(id);
1594 }
1595 EXPORT_SYMBOL_GPL(security_kernel_load_data);
1596
1597 int security_task_fix_setuid(struct cred *new, const struct cred *old,
1598                              int flags)
1599 {
1600         return call_int_hook(task_fix_setuid, 0, new, old, flags);
1601 }
1602
1603 int security_task_setpgid(struct task_struct *p, pid_t pgid)
1604 {
1605         return call_int_hook(task_setpgid, 0, p, pgid);
1606 }
1607
1608 int security_task_getpgid(struct task_struct *p)
1609 {
1610         return call_int_hook(task_getpgid, 0, p);
1611 }
1612
1613 int security_task_getsid(struct task_struct *p)
1614 {
1615         return call_int_hook(task_getsid, 0, p);
1616 }
1617
1618 void security_task_getsecid(struct task_struct *p, u32 *secid)
1619 {
1620         *secid = 0;
1621         call_void_hook(task_getsecid, p, secid);
1622 }
1623 EXPORT_SYMBOL(security_task_getsecid);
1624
1625 int security_task_setnice(struct task_struct *p, int nice)
1626 {
1627         return call_int_hook(task_setnice, 0, p, nice);
1628 }
1629
1630 int security_task_setioprio(struct task_struct *p, int ioprio)
1631 {
1632         return call_int_hook(task_setioprio, 0, p, ioprio);
1633 }
1634
1635 int security_task_getioprio(struct task_struct *p)
1636 {
1637         return call_int_hook(task_getioprio, 0, p);
1638 }
1639
1640 int security_task_prlimit(const struct cred *cred, const struct cred *tcred,
1641                           unsigned int flags)
1642 {
1643         return call_int_hook(task_prlimit, 0, cred, tcred, flags);
1644 }
1645
1646 int security_task_setrlimit(struct task_struct *p, unsigned int resource,
1647                 struct rlimit *new_rlim)
1648 {
1649         return call_int_hook(task_setrlimit, 0, p, resource, new_rlim);
1650 }
1651
1652 int security_task_setscheduler(struct task_struct *p)
1653 {
1654         return call_int_hook(task_setscheduler, 0, p);
1655 }
1656
1657 int security_task_getscheduler(struct task_struct *p)
1658 {
1659         return call_int_hook(task_getscheduler, 0, p);
1660 }
1661
1662 int security_task_movememory(struct task_struct *p)
1663 {
1664         return call_int_hook(task_movememory, 0, p);
1665 }
1666
1667 int security_task_kill(struct task_struct *p, struct kernel_siginfo *info,
1668                         int sig, const struct cred *cred)
1669 {
1670         return call_int_hook(task_kill, 0, p, info, sig, cred);
1671 }
1672
1673 int security_task_prctl(int option, unsigned long arg2, unsigned long arg3,
1674                          unsigned long arg4, unsigned long arg5)
1675 {
1676         int thisrc;
1677         int rc = -ENOSYS;
1678         struct security_hook_list *hp;
1679
1680         hlist_for_each_entry(hp, &security_hook_heads.task_prctl, list) {
1681                 thisrc = hp->hook.task_prctl(option, arg2, arg3, arg4, arg5);
1682                 if (thisrc != -ENOSYS) {
1683                         rc = thisrc;
1684                         if (thisrc != 0)
1685                                 break;
1686                 }
1687         }
1688         return rc;
1689 }
1690
1691 void security_task_to_inode(struct task_struct *p, struct inode *inode)
1692 {
1693         call_void_hook(task_to_inode, p, inode);
1694 }
1695
1696 int security_ipc_permission(struct kern_ipc_perm *ipcp, short flag)
1697 {
1698         return call_int_hook(ipc_permission, 0, ipcp, flag);
1699 }
1700
1701 void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid)
1702 {
1703         *secid = 0;
1704         call_void_hook(ipc_getsecid, ipcp, secid);
1705 }
1706
1707 int security_msg_msg_alloc(struct msg_msg *msg)
1708 {
1709         int rc = lsm_msg_msg_alloc(msg);
1710
1711         if (unlikely(rc))
1712                 return rc;
1713         rc = call_int_hook(msg_msg_alloc_security, 0, msg);
1714         if (unlikely(rc))
1715                 security_msg_msg_free(msg);
1716         return rc;
1717 }
1718
1719 void security_msg_msg_free(struct msg_msg *msg)
1720 {
1721         call_void_hook(msg_msg_free_security, msg);
1722         kfree(msg->security);
1723         msg->security = NULL;
1724 }
1725
1726 int security_msg_queue_alloc(struct kern_ipc_perm *msq)
1727 {
1728         int rc = lsm_ipc_alloc(msq);
1729
1730         if (unlikely(rc))
1731                 return rc;
1732         rc = call_int_hook(msg_queue_alloc_security, 0, msq);
1733         if (unlikely(rc))
1734                 security_msg_queue_free(msq);
1735         return rc;
1736 }
1737
1738 void security_msg_queue_free(struct kern_ipc_perm *msq)
1739 {
1740         call_void_hook(msg_queue_free_security, msq);
1741         kfree(msq->security);
1742         msq->security = NULL;
1743 }
1744
1745 int security_msg_queue_associate(struct kern_ipc_perm *msq, int msqflg)
1746 {
1747         return call_int_hook(msg_queue_associate, 0, msq, msqflg);
1748 }
1749
1750 int security_msg_queue_msgctl(struct kern_ipc_perm *msq, int cmd)
1751 {
1752         return call_int_hook(msg_queue_msgctl, 0, msq, cmd);
1753 }
1754
1755 int security_msg_queue_msgsnd(struct kern_ipc_perm *msq,
1756                                struct msg_msg *msg, int msqflg)
1757 {
1758         return call_int_hook(msg_queue_msgsnd, 0, msq, msg, msqflg);
1759 }
1760
1761 int security_msg_queue_msgrcv(struct kern_ipc_perm *msq, struct msg_msg *msg,
1762                                struct task_struct *target, long type, int mode)
1763 {
1764         return call_int_hook(msg_queue_msgrcv, 0, msq, msg, target, type, mode);
1765 }
1766
1767 int security_shm_alloc(struct kern_ipc_perm *shp)
1768 {
1769         int rc = lsm_ipc_alloc(shp);
1770
1771         if (unlikely(rc))
1772                 return rc;
1773         rc = call_int_hook(shm_alloc_security, 0, shp);
1774         if (unlikely(rc))
1775                 security_shm_free(shp);
1776         return rc;
1777 }
1778
1779 void security_shm_free(struct kern_ipc_perm *shp)
1780 {
1781         call_void_hook(shm_free_security, shp);
1782         kfree(shp->security);
1783         shp->security = NULL;
1784 }
1785
1786 int security_shm_associate(struct kern_ipc_perm *shp, int shmflg)
1787 {
1788         return call_int_hook(shm_associate, 0, shp, shmflg);
1789 }
1790
1791 int security_shm_shmctl(struct kern_ipc_perm *shp, int cmd)
1792 {
1793         return call_int_hook(shm_shmctl, 0, shp, cmd);
1794 }
1795
1796 int security_shm_shmat(struct kern_ipc_perm *shp, char __user *shmaddr, int shmflg)
1797 {
1798         return call_int_hook(shm_shmat, 0, shp, shmaddr, shmflg);
1799 }
1800
1801 int security_sem_alloc(struct kern_ipc_perm *sma)
1802 {
1803         int rc = lsm_ipc_alloc(sma);
1804
1805         if (unlikely(rc))
1806                 return rc;
1807         rc = call_int_hook(sem_alloc_security, 0, sma);
1808         if (unlikely(rc))
1809                 security_sem_free(sma);
1810         return rc;
1811 }
1812
1813 void security_sem_free(struct kern_ipc_perm *sma)
1814 {
1815         call_void_hook(sem_free_security, sma);
1816         kfree(sma->security);
1817         sma->security = NULL;
1818 }
1819
1820 int security_sem_associate(struct kern_ipc_perm *sma, int semflg)
1821 {
1822         return call_int_hook(sem_associate, 0, sma, semflg);
1823 }
1824
1825 int security_sem_semctl(struct kern_ipc_perm *sma, int cmd)
1826 {
1827         return call_int_hook(sem_semctl, 0, sma, cmd);
1828 }
1829
1830 int security_sem_semop(struct kern_ipc_perm *sma, struct sembuf *sops,
1831                         unsigned nsops, int alter)
1832 {
1833         return call_int_hook(sem_semop, 0, sma, sops, nsops, alter);
1834 }
1835
1836 void security_d_instantiate(struct dentry *dentry, struct inode *inode)
1837 {
1838         if (unlikely(inode && IS_PRIVATE(inode)))
1839                 return;
1840         call_void_hook(d_instantiate, dentry, inode);
1841 }
1842 EXPORT_SYMBOL(security_d_instantiate);
1843
1844 int security_getprocattr(struct task_struct *p, const char *lsm, char *name,
1845                                 char **value)
1846 {
1847         struct security_hook_list *hp;
1848
1849         hlist_for_each_entry(hp, &security_hook_heads.getprocattr, list) {
1850                 if (lsm != NULL && strcmp(lsm, hp->lsm))
1851                         continue;
1852                 return hp->hook.getprocattr(p, name, value);
1853         }
1854         return -EINVAL;
1855 }
1856
1857 int security_setprocattr(const char *lsm, const char *name, void *value,
1858                          size_t size)
1859 {
1860         struct security_hook_list *hp;
1861
1862         hlist_for_each_entry(hp, &security_hook_heads.setprocattr, list) {
1863                 if (lsm != NULL && strcmp(lsm, hp->lsm))
1864                         continue;
1865                 return hp->hook.setprocattr(name, value, size);
1866         }
1867         return -EINVAL;
1868 }
1869
1870 int security_netlink_send(struct sock *sk, struct sk_buff *skb)
1871 {
1872         return call_int_hook(netlink_send, 0, sk, skb);
1873 }
1874
1875 int security_ismaclabel(const char *name)
1876 {
1877         return call_int_hook(ismaclabel, 0, name);
1878 }
1879 EXPORT_SYMBOL(security_ismaclabel);
1880
1881 int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
1882 {
1883         return call_int_hook(secid_to_secctx, -EOPNOTSUPP, secid, secdata,
1884                                 seclen);
1885 }
1886 EXPORT_SYMBOL(security_secid_to_secctx);
1887
1888 int security_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid)
1889 {
1890         *secid = 0;
1891         return call_int_hook(secctx_to_secid, 0, secdata, seclen, secid);
1892 }
1893 EXPORT_SYMBOL(security_secctx_to_secid);
1894
1895 void security_release_secctx(char *secdata, u32 seclen)
1896 {
1897         call_void_hook(release_secctx, secdata, seclen);
1898 }
1899 EXPORT_SYMBOL(security_release_secctx);
1900
1901 void security_inode_invalidate_secctx(struct inode *inode)
1902 {
1903         call_void_hook(inode_invalidate_secctx, inode);
1904 }
1905 EXPORT_SYMBOL(security_inode_invalidate_secctx);
1906
1907 int security_inode_notifysecctx(struct inode *inode, void *ctx, u32 ctxlen)
1908 {
1909         return call_int_hook(inode_notifysecctx, 0, inode, ctx, ctxlen);
1910 }
1911 EXPORT_SYMBOL(security_inode_notifysecctx);
1912
1913 int security_inode_setsecctx(struct dentry *dentry, void *ctx, u32 ctxlen)
1914 {
1915         return call_int_hook(inode_setsecctx, 0, dentry, ctx, ctxlen);
1916 }
1917 EXPORT_SYMBOL(security_inode_setsecctx);
1918
1919 int security_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen)
1920 {
1921         return call_int_hook(inode_getsecctx, -EOPNOTSUPP, inode, ctx, ctxlen);
1922 }
1923 EXPORT_SYMBOL(security_inode_getsecctx);
1924
1925 #ifdef CONFIG_SECURITY_NETWORK
1926
1927 int security_unix_stream_connect(struct sock *sock, struct sock *other, struct sock *newsk)
1928 {
1929         return call_int_hook(unix_stream_connect, 0, sock, other, newsk);
1930 }
1931 EXPORT_SYMBOL(security_unix_stream_connect);
1932
1933 int security_unix_may_send(struct socket *sock,  struct socket *other)
1934 {
1935         return call_int_hook(unix_may_send, 0, sock, other);
1936 }
1937 EXPORT_SYMBOL(security_unix_may_send);
1938
1939 int security_socket_create(int family, int type, int protocol, int kern)
1940 {
1941         return call_int_hook(socket_create, 0, family, type, protocol, kern);
1942 }
1943
1944 int security_socket_post_create(struct socket *sock, int family,
1945                                 int type, int protocol, int kern)
1946 {
1947         return call_int_hook(socket_post_create, 0, sock, family, type,
1948                                                 protocol, kern);
1949 }
1950
1951 int security_socket_socketpair(struct socket *socka, struct socket *sockb)
1952 {
1953         return call_int_hook(socket_socketpair, 0, socka, sockb);
1954 }
1955 EXPORT_SYMBOL(security_socket_socketpair);
1956
1957 int security_socket_bind(struct socket *sock, struct sockaddr *address, int addrlen)
1958 {
1959         return call_int_hook(socket_bind, 0, sock, address, addrlen);
1960 }
1961
1962 int security_socket_connect(struct socket *sock, struct sockaddr *address, int addrlen)
1963 {
1964         return call_int_hook(socket_connect, 0, sock, address, addrlen);
1965 }
1966
1967 int security_socket_listen(struct socket *sock, int backlog)
1968 {
1969         return call_int_hook(socket_listen, 0, sock, backlog);
1970 }
1971
1972 int security_socket_accept(struct socket *sock, struct socket *newsock)
1973 {
1974         return call_int_hook(socket_accept, 0, sock, newsock);
1975 }
1976
1977 int security_socket_sendmsg(struct socket *sock, struct msghdr *msg, int size)
1978 {
1979         return call_int_hook(socket_sendmsg, 0, sock, msg, size);
1980 }
1981
1982 int security_socket_recvmsg(struct socket *sock, struct msghdr *msg,
1983                             int size, int flags)
1984 {
1985         return call_int_hook(socket_recvmsg, 0, sock, msg, size, flags);
1986 }
1987
1988 int security_socket_getsockname(struct socket *sock)
1989 {
1990         return call_int_hook(socket_getsockname, 0, sock);
1991 }
1992
1993 int security_socket_getpeername(struct socket *sock)
1994 {
1995         return call_int_hook(socket_getpeername, 0, sock);
1996 }
1997
1998 int security_socket_getsockopt(struct socket *sock, int level, int optname)
1999 {
2000         return call_int_hook(socket_getsockopt, 0, sock, level, optname);
2001 }
2002
2003 int security_socket_setsockopt(struct socket *sock, int level, int optname)
2004 {
2005         return call_int_hook(socket_setsockopt, 0, sock, level, optname);
2006 }
2007
2008 int security_socket_shutdown(struct socket *sock, int how)
2009 {
2010         return call_int_hook(socket_shutdown, 0, sock, how);
2011 }
2012
2013 int security_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
2014 {
2015         return call_int_hook(socket_sock_rcv_skb, 0, sk, skb);
2016 }
2017 EXPORT_SYMBOL(security_sock_rcv_skb);
2018
2019 int security_socket_getpeersec_stream(struct socket *sock, char __user *optval,
2020                                       int __user *optlen, unsigned len)
2021 {
2022         return call_int_hook(socket_getpeersec_stream, -ENOPROTOOPT, sock,
2023                                 optval, optlen, len);
2024 }
2025
2026 int security_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb, u32 *secid)
2027 {
2028         return call_int_hook(socket_getpeersec_dgram, -ENOPROTOOPT, sock,
2029                              skb, secid);
2030 }
2031 EXPORT_SYMBOL(security_socket_getpeersec_dgram);
2032
2033 int security_sk_alloc(struct sock *sk, int family, gfp_t priority)
2034 {
2035         return call_int_hook(sk_alloc_security, 0, sk, family, priority);
2036 }
2037
2038 void security_sk_free(struct sock *sk)
2039 {
2040         call_void_hook(sk_free_security, sk);
2041 }
2042
2043 void security_sk_clone(const struct sock *sk, struct sock *newsk)
2044 {
2045         call_void_hook(sk_clone_security, sk, newsk);
2046 }
2047 EXPORT_SYMBOL(security_sk_clone);
2048
2049 void security_sk_classify_flow(struct sock *sk, struct flowi *fl)
2050 {
2051         call_void_hook(sk_getsecid, sk, &fl->flowi_secid);
2052 }
2053 EXPORT_SYMBOL(security_sk_classify_flow);
2054
2055 void security_req_classify_flow(const struct request_sock *req, struct flowi *fl)
2056 {
2057         call_void_hook(req_classify_flow, req, fl);
2058 }
2059 EXPORT_SYMBOL(security_req_classify_flow);
2060
2061 void security_sock_graft(struct sock *sk, struct socket *parent)
2062 {
2063         call_void_hook(sock_graft, sk, parent);
2064 }
2065 EXPORT_SYMBOL(security_sock_graft);
2066
2067 int security_inet_conn_request(struct sock *sk,
2068                         struct sk_buff *skb, struct request_sock *req)
2069 {
2070         return call_int_hook(inet_conn_request, 0, sk, skb, req);
2071 }
2072 EXPORT_SYMBOL(security_inet_conn_request);
2073
2074 void security_inet_csk_clone(struct sock *newsk,
2075                         const struct request_sock *req)
2076 {
2077         call_void_hook(inet_csk_clone, newsk, req);
2078 }
2079
2080 void security_inet_conn_established(struct sock *sk,
2081                         struct sk_buff *skb)
2082 {
2083         call_void_hook(inet_conn_established, sk, skb);
2084 }
2085 EXPORT_SYMBOL(security_inet_conn_established);
2086
2087 int security_secmark_relabel_packet(u32 secid)
2088 {
2089         return call_int_hook(secmark_relabel_packet, 0, secid);
2090 }
2091 EXPORT_SYMBOL(security_secmark_relabel_packet);
2092
2093 void security_secmark_refcount_inc(void)
2094 {
2095         call_void_hook(secmark_refcount_inc);
2096 }
2097 EXPORT_SYMBOL(security_secmark_refcount_inc);
2098
2099 void security_secmark_refcount_dec(void)
2100 {
2101         call_void_hook(secmark_refcount_dec);
2102 }
2103 EXPORT_SYMBOL(security_secmark_refcount_dec);
2104
2105 int security_tun_dev_alloc_security(void **security)
2106 {
2107         return call_int_hook(tun_dev_alloc_security, 0, security);
2108 }
2109 EXPORT_SYMBOL(security_tun_dev_alloc_security);
2110
2111 void security_tun_dev_free_security(void *security)
2112 {
2113         call_void_hook(tun_dev_free_security, security);
2114 }
2115 EXPORT_SYMBOL(security_tun_dev_free_security);
2116
2117 int security_tun_dev_create(void)
2118 {
2119         return call_int_hook(tun_dev_create, 0);
2120 }
2121 EXPORT_SYMBOL(security_tun_dev_create);
2122
2123 int security_tun_dev_attach_queue(void *security)
2124 {
2125         return call_int_hook(tun_dev_attach_queue, 0, security);
2126 }
2127 EXPORT_SYMBOL(security_tun_dev_attach_queue);
2128
2129 int security_tun_dev_attach(struct sock *sk, void *security)
2130 {
2131         return call_int_hook(tun_dev_attach, 0, sk, security);
2132 }
2133 EXPORT_SYMBOL(security_tun_dev_attach);
2134
2135 int security_tun_dev_open(void *security)
2136 {
2137         return call_int_hook(tun_dev_open, 0, security);
2138 }
2139 EXPORT_SYMBOL(security_tun_dev_open);
2140
2141 int security_sctp_assoc_request(struct sctp_endpoint *ep, struct sk_buff *skb)
2142 {
2143         return call_int_hook(sctp_assoc_request, 0, ep, skb);
2144 }
2145 EXPORT_SYMBOL(security_sctp_assoc_request);
2146
2147 int security_sctp_bind_connect(struct sock *sk, int optname,
2148                                struct sockaddr *address, int addrlen)
2149 {
2150         return call_int_hook(sctp_bind_connect, 0, sk, optname,
2151                              address, addrlen);
2152 }
2153 EXPORT_SYMBOL(security_sctp_bind_connect);
2154
2155 void security_sctp_sk_clone(struct sctp_endpoint *ep, struct sock *sk,
2156                             struct sock *newsk)
2157 {
2158         call_void_hook(sctp_sk_clone, ep, sk, newsk);
2159 }
2160 EXPORT_SYMBOL(security_sctp_sk_clone);
2161
2162 #endif  /* CONFIG_SECURITY_NETWORK */
2163
2164 #ifdef CONFIG_SECURITY_INFINIBAND
2165
2166 int security_ib_pkey_access(void *sec, u64 subnet_prefix, u16 pkey)
2167 {
2168         return call_int_hook(ib_pkey_access, 0, sec, subnet_prefix, pkey);
2169 }
2170 EXPORT_SYMBOL(security_ib_pkey_access);
2171
2172 int security_ib_endport_manage_subnet(void *sec, const char *dev_name, u8 port_num)
2173 {
2174         return call_int_hook(ib_endport_manage_subnet, 0, sec, dev_name, port_num);
2175 }
2176 EXPORT_SYMBOL(security_ib_endport_manage_subnet);
2177
2178 int security_ib_alloc_security(void **sec)
2179 {
2180         return call_int_hook(ib_alloc_security, 0, sec);
2181 }
2182 EXPORT_SYMBOL(security_ib_alloc_security);
2183
2184 void security_ib_free_security(void *sec)
2185 {
2186         call_void_hook(ib_free_security, sec);
2187 }
2188 EXPORT_SYMBOL(security_ib_free_security);
2189 #endif  /* CONFIG_SECURITY_INFINIBAND */
2190
2191 #ifdef CONFIG_SECURITY_NETWORK_XFRM
2192
2193 int security_xfrm_policy_alloc(struct xfrm_sec_ctx **ctxp,
2194                                struct xfrm_user_sec_ctx *sec_ctx,
2195                                gfp_t gfp)
2196 {
2197         return call_int_hook(xfrm_policy_alloc_security, 0, ctxp, sec_ctx, gfp);
2198 }
2199 EXPORT_SYMBOL(security_xfrm_policy_alloc);
2200
2201 int security_xfrm_policy_clone(struct xfrm_sec_ctx *old_ctx,
2202                               struct xfrm_sec_ctx **new_ctxp)
2203 {
2204         return call_int_hook(xfrm_policy_clone_security, 0, old_ctx, new_ctxp);
2205 }
2206
2207 void security_xfrm_policy_free(struct xfrm_sec_ctx *ctx)
2208 {
2209         call_void_hook(xfrm_policy_free_security, ctx);
2210 }
2211 EXPORT_SYMBOL(security_xfrm_policy_free);
2212
2213 int security_xfrm_policy_delete(struct xfrm_sec_ctx *ctx)
2214 {
2215         return call_int_hook(xfrm_policy_delete_security, 0, ctx);
2216 }
2217
2218 int security_xfrm_state_alloc(struct xfrm_state *x,
2219                               struct xfrm_user_sec_ctx *sec_ctx)
2220 {
2221         return call_int_hook(xfrm_state_alloc, 0, x, sec_ctx);
2222 }
2223 EXPORT_SYMBOL(security_xfrm_state_alloc);
2224
2225 int security_xfrm_state_alloc_acquire(struct xfrm_state *x,
2226                                       struct xfrm_sec_ctx *polsec, u32 secid)
2227 {
2228         return call_int_hook(xfrm_state_alloc_acquire, 0, x, polsec, secid);
2229 }
2230
2231 int security_xfrm_state_delete(struct xfrm_state *x)
2232 {
2233         return call_int_hook(xfrm_state_delete_security, 0, x);
2234 }
2235 EXPORT_SYMBOL(security_xfrm_state_delete);
2236
2237 void security_xfrm_state_free(struct xfrm_state *x)
2238 {
2239         call_void_hook(xfrm_state_free_security, x);
2240 }
2241
2242 int security_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir)
2243 {
2244         return call_int_hook(xfrm_policy_lookup, 0, ctx, fl_secid, dir);
2245 }
2246
2247 int security_xfrm_state_pol_flow_match(struct xfrm_state *x,
2248                                        struct xfrm_policy *xp,
2249                                        const struct flowi *fl)
2250 {
2251         struct security_hook_list *hp;
2252         int rc = 1;
2253
2254         /*
2255          * Since this function is expected to return 0 or 1, the judgment
2256          * becomes difficult if multiple LSMs supply this call. Fortunately,
2257          * we can use the first LSM's judgment because currently only SELinux
2258          * supplies this call.
2259          *
2260          * For speed optimization, we explicitly break the loop rather than
2261          * using the macro
2262          */
2263         hlist_for_each_entry(hp, &security_hook_heads.xfrm_state_pol_flow_match,
2264                                 list) {
2265                 rc = hp->hook.xfrm_state_pol_flow_match(x, xp, fl);
2266                 break;
2267         }
2268         return rc;
2269 }
2270
2271 int security_xfrm_decode_session(struct sk_buff *skb, u32 *secid)
2272 {
2273         return call_int_hook(xfrm_decode_session, 0, skb, secid, 1);
2274 }
2275
2276 void security_skb_classify_flow(struct sk_buff *skb, struct flowi *fl)
2277 {
2278         int rc = call_int_hook(xfrm_decode_session, 0, skb, &fl->flowi_secid,
2279                                 0);
2280
2281         BUG_ON(rc);
2282 }
2283 EXPORT_SYMBOL(security_skb_classify_flow);
2284
2285 #endif  /* CONFIG_SECURITY_NETWORK_XFRM */
2286
2287 #ifdef CONFIG_KEYS
2288
2289 int security_key_alloc(struct key *key, const struct cred *cred,
2290                        unsigned long flags)
2291 {
2292         return call_int_hook(key_alloc, 0, key, cred, flags);
2293 }
2294
2295 void security_key_free(struct key *key)
2296 {
2297         call_void_hook(key_free, key);
2298 }
2299
2300 int security_key_permission(key_ref_t key_ref,
2301                             const struct cred *cred, unsigned perm)
2302 {
2303         return call_int_hook(key_permission, 0, key_ref, cred, perm);
2304 }
2305
2306 int security_key_getsecurity(struct key *key, char **_buffer)
2307 {
2308         *_buffer = NULL;
2309         return call_int_hook(key_getsecurity, 0, key, _buffer);
2310 }
2311
2312 #endif  /* CONFIG_KEYS */
2313
2314 #ifdef CONFIG_AUDIT
2315
2316 int security_audit_rule_init(u32 field, u32 op, char *rulestr, void **lsmrule)
2317 {
2318         return call_int_hook(audit_rule_init, 0, field, op, rulestr, lsmrule);
2319 }
2320
2321 int security_audit_rule_known(struct audit_krule *krule)
2322 {
2323         return call_int_hook(audit_rule_known, 0, krule);
2324 }
2325
2326 void security_audit_rule_free(void *lsmrule)
2327 {
2328         call_void_hook(audit_rule_free, lsmrule);
2329 }
2330
2331 int security_audit_rule_match(u32 secid, u32 field, u32 op, void *lsmrule)
2332 {
2333         return call_int_hook(audit_rule_match, 0, secid, field, op, lsmrule);
2334 }
2335 #endif /* CONFIG_AUDIT */
2336
2337 #ifdef CONFIG_BPF_SYSCALL
2338 int security_bpf(int cmd, union bpf_attr *attr, unsigned int size)
2339 {
2340         return call_int_hook(bpf, 0, cmd, attr, size);
2341 }
2342 int security_bpf_map(struct bpf_map *map, fmode_t fmode)
2343 {
2344         return call_int_hook(bpf_map, 0, map, fmode);
2345 }
2346 int security_bpf_prog(struct bpf_prog *prog)
2347 {
2348         return call_int_hook(bpf_prog, 0, prog);
2349 }
2350 int security_bpf_map_alloc(struct bpf_map *map)
2351 {
2352         return call_int_hook(bpf_map_alloc_security, 0, map);
2353 }
2354 int security_bpf_prog_alloc(struct bpf_prog_aux *aux)
2355 {
2356         return call_int_hook(bpf_prog_alloc_security, 0, aux);
2357 }
2358 void security_bpf_map_free(struct bpf_map *map)
2359 {
2360         call_void_hook(bpf_map_free_security, map);
2361 }
2362 void security_bpf_prog_free(struct bpf_prog_aux *aux)
2363 {
2364         call_void_hook(bpf_prog_free_security, aux);
2365 }
2366 #endif /* CONFIG_BPF_SYSCALL */