security/security.c

   1 /*
   2  * Security plug functions
   3  *
   4  * Copyright (C) 2001 WireX Communications, Inc <chris@wirex.com>
   5  * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
   6  * Copyright (C) 2001 Networks Associates Technology, Inc <ssmalley@nai.com>
   7  * Copyright (C) 2016 Mellanox Technologies
   8  *
   9  *      This program is free software; you can redistribute it and/or modify
  10  *      it under the terms of the GNU General Public License as published by
  11  *      the Free Software Foundation; either version 2 of the License, or
  12  *      (at your option) any later version.
  13  */
  14
  15 #define pr_fmt(fmt) "LSM: " fmt
  16
  17 #include <linux/bpf.h>
  18 #include <linux/capability.h>
  19 #include <linux/dcache.h>
  20 #include <linux/export.h>
  21 #include <linux/init.h>
  22 #include <linux/kernel.h>
  23 #include <linux/lsm_hooks.h>
  24 #include <linux/integrity.h>
  25 #include <linux/ima.h>
  26 #include <linux/evm.h>
  27 #include <linux/fsnotify.h>
  28 #include <linux/mman.h>
  29 #include <linux/mount.h>
  30 #include <linux/personality.h>
  31 #include <linux/backing-dev.h>
  32 #include <linux/string.h>
  33 #include <linux/msg.h>
  34 #include <net/flow.h>
  35
  36 #define MAX_LSM_EVM_XATTR       2
  37
  38 /* How many LSMs were built into the kernel? */
  39 #define LSM_COUNT (__end_lsm_info - __start_lsm_info)
  40
  41 struct security_hook_heads security_hook_heads __lsm_ro_after_init;
  42 static ATOMIC_NOTIFIER_HEAD(lsm_notifier_chain);
  43
  44 static struct kmem_cache *lsm_file_cache;
  45 static struct kmem_cache *lsm_inode_cache;
  46
  47 char *lsm_names;
  48 static struct lsm_blob_sizes blob_sizes __lsm_ro_after_init;
  49
  50 /* Boot-time LSM user choice */
  51 static __initdata const char *chosen_lsm_order;
  52 static __initdata const char *chosen_major_lsm;
  53
  54 static __initconst const char * const builtin_lsm_order = CONFIG_LSM;
  55
  56 /* Ordered list of LSMs to initialize. */
  57 static __initdata struct lsm_info **ordered_lsms;
  58 static __initdata struct lsm_info *exclusive;
  59
  60 static __initdata bool debug;
  61 #define init_debug(...)                                         \
  62         do {                                                    \
  63                 if (debug)                                      \
  64                         pr_info(__VA_ARGS__);                   \
  65         } while (0)
  66
  67 static bool __init is_enabled(struct lsm_info *lsm)
  68 {
  69         if (!lsm->enabled)
  70                 return false;
  71
  72         return *lsm->enabled;
  73 }
  74
  75 /* Mark an LSM's enabled flag. */
  76 static int lsm_enabled_true __initdata = 1;
  77 static int lsm_enabled_false __initdata = 0;
  78 static void __init set_enabled(struct lsm_info *lsm, bool enabled)
  79 {
  80         /*
  81          * When an LSM hasn't configured an enable variable, we can use
  82          * a hard-coded location for storing the default enabled state.
  83          */
  84         if (!lsm->enabled) {
  85                 if (enabled)
  86                         lsm->enabled = &lsm_enabled_true;
  87                 else
  88                         lsm->enabled = &lsm_enabled_false;
  89         } else if (lsm->enabled == &lsm_enabled_true) {
  90                 if (!enabled)
  91                         lsm->enabled = &lsm_enabled_false;
  92         } else if (lsm->enabled == &lsm_enabled_false) {
  93                 if (enabled)
  94                         lsm->enabled = &lsm_enabled_true;
  95         } else {
  96                 *lsm->enabled = enabled;
  97         }
  98 }
  99
 100 /* Is an LSM already listed in the ordered LSMs list? */
 101 static bool __init exists_ordered_lsm(struct lsm_info *lsm)
 102 {
 103         struct lsm_info **check;
 104
 105         for (check = ordered_lsms; *check; check++)
 106                 if (*check == lsm)
 107                         return true;
 108
 109         return false;
 110 }
 111
 112 /* Append an LSM to the list of ordered LSMs to initialize. */
 113 static int last_lsm __initdata;
 114 static void __init append_ordered_lsm(struct lsm_info *lsm, const char *from)
 115 {
 116         /* Ignore duplicate selections. */
 117         if (exists_ordered_lsm(lsm))
 118                 return;
 119
 120         if (WARN(last_lsm == LSM_COUNT, "%s: out of LSM slots!?\n", from))
 121                 return;
 122
 123         /* Enable this LSM, if it is not already set. */
 124         if (!lsm->enabled)
 125                 lsm->enabled = &lsm_enabled_true;
 126         ordered_lsms[last_lsm++] = lsm;
 127
 128         init_debug("%s ordering: %s (%sabled)\n", from, lsm->name,
 129                    is_enabled(lsm) ? "en" : "dis");
 130 }
 131
 132 /* Is an LSM allowed to be initialized? */
 133 static bool __init lsm_allowed(struct lsm_info *lsm)
 134 {
 135         /* Skip if the LSM is disabled. */
 136         if (!is_enabled(lsm))
 137                 return false;
 138
 139         /* Not allowed if another exclusive LSM already initialized. */
 140         if ((lsm->flags & LSM_FLAG_EXCLUSIVE) && exclusive) {
 141                 init_debug("exclusive disabled: %s\n", lsm->name);
 142                 return false;
 143         }
 144
 145         return true;
 146 }
 147
 148 static void __init lsm_set_blob_size(int *need, int *lbs)
 149 {
 150         int offset;
 151
 152         if (*need > 0) {
 153                 offset = *lbs;
 154                 *lbs += *need;
 155                 *need = offset;
 156         }
 157 }
 158
 159 static void __init lsm_set_blob_sizes(struct lsm_blob_sizes *needed)
 160 {
 161         if (!needed)
 162                 return;
 163
 164         lsm_set_blob_size(&needed->lbs_cred, &blob_sizes.lbs_cred);
 165         lsm_set_blob_size(&needed->lbs_file, &blob_sizes.lbs_file);
 166         /*
 167          * The inode blob gets an rcu_head in addition to
 168          * what the modules might need.
 169          */
 170         if (needed->lbs_inode && blob_sizes.lbs_inode == 0)
 171                 blob_sizes.lbs_inode = sizeof(struct rcu_head);
 172         lsm_set_blob_size(&needed->lbs_inode, &blob_sizes.lbs_inode);
 173         lsm_set_blob_size(&needed->lbs_ipc, &blob_sizes.lbs_ipc);
 174         lsm_set_blob_size(&needed->lbs_msg_msg, &blob_sizes.lbs_msg_msg);
 175         lsm_set_blob_size(&needed->lbs_task, &blob_sizes.lbs_task);
 176 }
 177
 178 /* Prepare LSM for initialization. */
 179 static void __init prepare_lsm(struct lsm_info *lsm)
 180 {
 181         int enabled = lsm_allowed(lsm);
 182
 183         /* Record enablement (to handle any following exclusive LSMs). */
 184         set_enabled(lsm, enabled);
 185
 186         /* If enabled, do pre-initialization work. */
 187         if (enabled) {
 188                 if ((lsm->flags & LSM_FLAG_EXCLUSIVE) && !exclusive) {
 189                         exclusive = lsm;
 190                         init_debug("exclusive chosen: %s\n", lsm->name);
 191                 }
 192
 193                 lsm_set_blob_sizes(lsm->blobs);
 194         }
 195 }
 196
 197 /* Initialize a given LSM, if it is enabled. */
 198 static void __init initialize_lsm(struct lsm_info *lsm)
 199 {
 200         if (is_enabled(lsm)) {
 201                 int ret;
 202
 203                 init_debug("initializing %s\n", lsm->name);
 204                 ret = lsm->init();
 205                 WARN(ret, "%s failed to initialize: %d\n", lsm->name, ret);
 206         }
 207 }
 208
 209 /* Populate ordered LSMs list from comma-separated LSM name list. */
 210 static void __init ordered_lsm_parse(const char *order, const char *origin)
 211 {
 212         struct lsm_info *lsm;
 213         char *sep, *name, *next;
 214
 215         /* LSM_ORDER_FIRST is always first. */
 216         for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) {
 217                 if (lsm->order == LSM_ORDER_FIRST)
 218                         append_ordered_lsm(lsm, "first");
 219         }
 220
 221         /* Process "security=", if given. */
 222         if (chosen_major_lsm) {
 223                 struct lsm_info *major;
 224
 225                 /*
 226                  * To match the original "security=" behavior, this
 227                  * explicitly does NOT fallback to another Legacy Major
 228                  * if the selected one was separately disabled: disable
 229                  * all non-matching Legacy Major LSMs.
 230                  */
 231                 for (major = __start_lsm_info; major < __end_lsm_info;
 232                      major++) {
 233                         if ((major->flags & LSM_FLAG_LEGACY_MAJOR) &&
 234                             strcmp(major->name, chosen_major_lsm) != 0) {
 235                                 set_enabled(major, false);
 236                                 init_debug("security=%s disabled: %s\n",
 237                                            chosen_major_lsm, major->name);
 238                         }
 239                 }
 240         }
 241
 242         sep = kstrdup(order, GFP_KERNEL);
 243         next = sep;
 244         /* Walk the list, looking for matching LSMs. */
 245         while ((name = strsep(&next, ",")) != NULL) {
 246                 bool found = false;
 247
 248                 for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) {
 249                         if (lsm->order == LSM_ORDER_MUTABLE &&
 250                             strcmp(lsm->name, name) == 0) {
 251                                 append_ordered_lsm(lsm, origin);
 252                                 found = true;
 253                         }
 254                 }
 255
 256                 if (!found)
 257                         init_debug("%s ignored: %s\n", origin, name);
 258         }
 259
 260         /* Process "security=", if given. */
 261         if (chosen_major_lsm) {
 262                 for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) {
 263                         if (exists_ordered_lsm(lsm))
 264                                 continue;
 265                         if (strcmp(lsm->name, chosen_major_lsm) == 0)
 266                                 append_ordered_lsm(lsm, "security=");
 267                 }
 268         }
 269
 270         /* Disable all LSMs not in the ordered list. */
 271         for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) {
 272                 if (exists_ordered_lsm(lsm))
 273                         continue;
 274                 set_enabled(lsm, false);
 275                 init_debug("%s disabled: %s\n", origin, lsm->name);
 276         }
 277
 278         kfree(sep);
 279 }
 280
 281 static void __init lsm_early_cred(struct cred *cred);
 282 static void __init lsm_early_task(struct task_struct *task);
 283
 284 static void __init ordered_lsm_init(void)
 285 {
 286         struct lsm_info **lsm;
 287
 288         ordered_lsms = kcalloc(LSM_COUNT + 1, sizeof(*ordered_lsms),
 289                                 GFP_KERNEL);
 290
 291         if (chosen_lsm_order) {
 292                 if (chosen_major_lsm) {
 293                         pr_info("security= is ignored because it is superseded by lsm=\n");
 294                         chosen_major_lsm = NULL;
 295                 }
 296                 ordered_lsm_parse(chosen_lsm_order, "cmdline");
 297         } else
 298                 ordered_lsm_parse(builtin_lsm_order, "builtin");
 299
 300         for (lsm = ordered_lsms; *lsm; lsm++)
 301                 prepare_lsm(*lsm);
 302
 303         init_debug("cred blob size     = %d\n", blob_sizes.lbs_cred);
 304         init_debug("file blob size     = %d\n", blob_sizes.lbs_file);
 305         init_debug("inode blob size    = %d\n", blob_sizes.lbs_inode);
 306         init_debug("ipc blob size      = %d\n", blob_sizes.lbs_ipc);
 307         init_debug("msg_msg blob size  = %d\n", blob_sizes.lbs_msg_msg);
 308         init_debug("task blob size     = %d\n", blob_sizes.lbs_task);
 309
 310         /*
 311          * Create any kmem_caches needed for blobs
 312          */
 313         if (blob_sizes.lbs_file)
 314                 lsm_file_cache = kmem_cache_create("lsm_file_cache",
 315                                                    blob_sizes.lbs_file, 0,
 316                                                    SLAB_PANIC, NULL);
 317         if (blob_sizes.lbs_inode)
 318                 lsm_inode_cache = kmem_cache_create("lsm_inode_cache",
 319                                                     blob_sizes.lbs_inode, 0,
 320                                                     SLAB_PANIC, NULL);
 321
 322         lsm_early_cred((struct cred *) current->cred);
 323         lsm_early_task(current);
 324         for (lsm = ordered_lsms; *lsm; lsm++)
 325                 initialize_lsm(*lsm);
 326
 327         kfree(ordered_lsms);
 328 }
 329
 330 /**
 331  * security_init - initializes the security framework
 332  *
 333  * This should be called early in the kernel initialization sequence.
 334  */
 335 int __init security_init(void)
 336 {
 337         int i;
 338         struct hlist_head *list = (struct hlist_head *) &security_hook_heads;
 339
 340         pr_info("Security Framework initializing\n");
 341
 342         for (i = 0; i < sizeof(security_hook_heads) / sizeof(struct hlist_head);
 343              i++)
 344                 INIT_HLIST_HEAD(&list[i]);
 345
 346         /* Load LSMs in specified order. */
 347         ordered_lsm_init();
 348
 349         return 0;
 350 }
 351
 352 /* Save user chosen LSM */
 353 static int __init choose_major_lsm(char *str)
 354 {
 355         chosen_major_lsm = str;
 356         return 1;
 357 }
 358 __setup("security=", choose_major_lsm);
 359
 360 /* Explicitly choose LSM initialization order. */
 361 static int __init choose_lsm_order(char *str)
 362 {
 363         chosen_lsm_order = str;
 364         return 1;
 365 }
 366 __setup("lsm=", choose_lsm_order);
 367
 368 /* Enable LSM order debugging. */
 369 static int __init enable_debug(char *str)
 370 {
 371         debug = true;
 372         return 1;
 373 }
 374 __setup("lsm.debug", enable_debug);
 375
 376 static bool match_last_lsm(const char *list, const char *lsm)
 377 {
 378         const char *last;
 379
 380         if (WARN_ON(!list || !lsm))
 381                 return false;
 382         last = strrchr(list, ',');
 383         if (last)
 384                 /* Pass the comma, strcmp() will check for '\0' */
 385                 last++;
 386         else
 387                 last = list;
 388         return !strcmp(last, lsm);
 389 }
 390
 391 static int lsm_append(char *new, char **result)
 392 {
 393         char *cp;
 394
 395         if (*result == NULL) {
 396                 *result = kstrdup(new, GFP_KERNEL);
 397                 if (*result == NULL)
 398                         return -ENOMEM;
 399         } else {
 400                 /* Check if it is the last registered name */
 401                 if (match_last_lsm(*result, new))
 402                         return 0;
 403                 cp = kasprintf(GFP_KERNEL, "%s,%s", *result, new);
 404                 if (cp == NULL)
 405                         return -ENOMEM;
 406                 kfree(*result);
 407                 *result = cp;
 408         }
 409         return 0;
 410 }
 411
 412 /**
 413  * security_add_hooks - Add a modules hooks to the hook lists.
 414  * @hooks: the hooks to add
 415  * @count: the number of hooks to add
 416  * @lsm: the name of the security module
 417  *
 418  * Each LSM has to register its hooks with the infrastructure.
 419  */
 420 void __init security_add_hooks(struct security_hook_list *hooks, int count,
 421                                 char *lsm)
 422 {
 423         int i;
 424
 425         for (i = 0; i < count; i++) {
 426                 hooks[i].lsm = lsm;
 427                 hlist_add_tail_rcu(&hooks[i].list, hooks[i].head);
 428         }
 429         if (lsm_append(lsm, &lsm_names) < 0)
 430                 panic("%s - Cannot get early memory.\n", __func__);
 431 }
 432
 433 int call_lsm_notifier(enum lsm_event event, void *data)
 434 {
 435         return atomic_notifier_call_chain(&lsm_notifier_chain, event, data);
 436 }
 437 EXPORT_SYMBOL(call_lsm_notifier);
 438
 439 int register_lsm_notifier(struct notifier_block *nb)
 440 {
 441         return atomic_notifier_chain_register(&lsm_notifier_chain, nb);
 442 }
 443 EXPORT_SYMBOL(register_lsm_notifier);
 444
 445 int unregister_lsm_notifier(struct notifier_block *nb)
 446 {
 447         return atomic_notifier_chain_unregister(&lsm_notifier_chain, nb);
 448 }
 449 EXPORT_SYMBOL(unregister_lsm_notifier);
 450
 451 /**
 452  * lsm_cred_alloc - allocate a composite cred blob
 453  * @cred: the cred that needs a blob
 454  * @gfp: allocation type
 455  *
 456  * Allocate the cred blob for all the modules
 457  *
 458  * Returns 0, or -ENOMEM if memory can't be allocated.
 459  */
 460 static int lsm_cred_alloc(struct cred *cred, gfp_t gfp)
 461 {
 462         if (blob_sizes.lbs_cred == 0) {
 463                 cred->security = NULL;
 464                 return 0;
 465         }
 466
 467         cred->security = kzalloc(blob_sizes.lbs_cred, gfp);
 468         if (cred->security == NULL)
 469                 return -ENOMEM;
 470         return 0;
 471 }
 472
 473 /**
 474  * lsm_early_cred - during initialization allocate a composite cred blob
 475  * @cred: the cred that needs a blob
 476  *
 477  * Allocate the cred blob for all the modules
 478  */
 479 static void __init lsm_early_cred(struct cred *cred)
 480 {
 481         int rc = lsm_cred_alloc(cred, GFP_KERNEL);
 482
 483         if (rc)
 484                 panic("%s: Early cred alloc failed.\n", __func__);
 485 }
 486
 487 /**
 488  * lsm_file_alloc - allocate a composite file blob
 489  * @file: the file that needs a blob
 490  *
 491  * Allocate the file blob for all the modules
 492  *
 493  * Returns 0, or -ENOMEM if memory can't be allocated.
 494  */
 495 static int lsm_file_alloc(struct file *file)
 496 {
 497         if (!lsm_file_cache) {
 498                 file->f_security = NULL;
 499                 return 0;
 500         }
 501
 502         file->f_security = kmem_cache_zalloc(lsm_file_cache, GFP_KERNEL);
 503         if (file->f_security == NULL)
 504                 return -ENOMEM;
 505         return 0;
 506 }
 507
 508 /**
 509  * lsm_inode_alloc - allocate a composite inode blob
 510  * @inode: the inode that needs a blob
 511  *
 512  * Allocate the inode blob for all the modules
 513  *
 514  * Returns 0, or -ENOMEM if memory can't be allocated.
 515  */
 516 int lsm_inode_alloc(struct inode *inode)
 517 {
 518         if (!lsm_inode_cache) {
 519                 inode->i_security = NULL;
 520                 return 0;
 521         }
 522
 523         inode->i_security = kmem_cache_zalloc(lsm_inode_cache, GFP_NOFS);
 524         if (inode->i_security == NULL)
 525                 return -ENOMEM;
 526         return 0;
 527 }
 528
 529 /**
 530  * lsm_task_alloc - allocate a composite task blob
 531  * @task: the task that needs a blob
 532  *
 533  * Allocate the task blob for all the modules
 534  *
 535  * Returns 0, or -ENOMEM if memory can't be allocated.
 536  */
 537 static int lsm_task_alloc(struct task_struct *task)
 538 {
 539         if (blob_sizes.lbs_task == 0) {
 540                 task->security = NULL;
 541                 return 0;
 542         }
 543
 544         task->security = kzalloc(blob_sizes.lbs_task, GFP_KERNEL);
 545         if (task->security == NULL)
 546                 return -ENOMEM;
 547         return 0;
 548 }
 549
 550 /**
 551  * lsm_ipc_alloc - allocate a composite ipc blob
 552  * @kip: the ipc that needs a blob
 553  *
 554  * Allocate the ipc blob for all the modules
 555  *
 556  * Returns 0, or -ENOMEM if memory can't be allocated.
 557  */
 558 static int lsm_ipc_alloc(struct kern_ipc_perm *kip)
 559 {
 560         if (blob_sizes.lbs_ipc == 0) {
 561                 kip->security = NULL;
 562                 return 0;
 563         }
 564
 565         kip->security = kzalloc(blob_sizes.lbs_ipc, GFP_KERNEL);
 566         if (kip->security == NULL)
 567                 return -ENOMEM;
 568         return 0;
 569 }
 570
 571 /**
 572  * lsm_msg_msg_alloc - allocate a composite msg_msg blob
 573  * @mp: the msg_msg that needs a blob
 574  *
 575  * Allocate the ipc blob for all the modules
 576  *
 577  * Returns 0, or -ENOMEM if memory can't be allocated.
 578  */
 579 static int lsm_msg_msg_alloc(struct msg_msg *mp)
 580 {
 581         if (blob_sizes.lbs_msg_msg == 0) {
 582                 mp->security = NULL;
 583                 return 0;
 584         }
 585
 586         mp->security = kzalloc(blob_sizes.lbs_msg_msg, GFP_KERNEL);
 587         if (mp->security == NULL)
 588                 return -ENOMEM;
 589         return 0;
 590 }
 591
 592 /**
 593  * lsm_early_task - during initialization allocate a composite task blob
 594  * @task: the task that needs a blob
 595  *
 596  * Allocate the task blob for all the modules
 597  */
 598 static void __init lsm_early_task(struct task_struct *task)
 599 {
 600         int rc = lsm_task_alloc(task);
 601
 602         if (rc)
 603                 panic("%s: Early task alloc failed.\n", __func__);
 604 }
 605
 606 /*
 607  * Hook list operation macros.
 608  *
 609  * call_void_hook:
 610  *      This is a hook that does not return a value.
 611  *
 612  * call_int_hook:
 613  *      This is a hook that returns a value.
 614  */
 615
 616 #define call_void_hook(FUNC, ...)                               \
 617         do {                                                    \
 618                 struct security_hook_list *P;                   \
 619                                                                 \
 620                 hlist_for_each_entry(P, &security_hook_heads.FUNC, list) \
 621                         P->hook.FUNC(__VA_ARGS__);              \
 622         } while (0)
 623
 624 #define call_int_hook(FUNC, IRC, ...) ({                        \
 625         int RC = IRC;                                           \
 626         do {                                                    \
 627                 struct security_hook_list *P;                   \
 628                                                                 \
 629                 hlist_for_each_entry(P, &security_hook_heads.FUNC, list) { \
 630                         RC = P->hook.FUNC(__VA_ARGS__);         \
 631                         if (RC != 0)                            \
 632                                 break;                          \
 633                 }                                               \
 634         } while (0);                                            \
 635         RC;                                                     \
 636 })
 637
 638 /* Security operations */
 639
 640 int security_binder_set_context_mgr(struct task_struct *mgr)
 641 {
 642         return call_int_hook(binder_set_context_mgr, 0, mgr);
 643 }
 644
 645 int security_binder_transaction(struct task_struct *from,
 646                                 struct task_struct *to)
 647 {
 648         return call_int_hook(binder_transaction, 0, from, to);
 649 }
 650
 651 int security_binder_transfer_binder(struct task_struct *from,
 652                                     struct task_struct *to)
 653 {
 654         return call_int_hook(binder_transfer_binder, 0, from, to);
 655 }
 656
 657 int security_binder_transfer_file(struct task_struct *from,
 658                                   struct task_struct *to, struct file *file)
 659 {
 660         return call_int_hook(binder_transfer_file, 0, from, to, file);
 661 }
 662
 663 int security_ptrace_access_check(struct task_struct *child, unsigned int mode)
 664 {
 665         return call_int_hook(ptrace_access_check, 0, child, mode);
 666 }
 667
 668 int security_ptrace_traceme(struct task_struct *parent)
 669 {
 670         return call_int_hook(ptrace_traceme, 0, parent);
 671 }
 672
 673 int security_capget(struct task_struct *target,
 674                      kernel_cap_t *effective,
 675                      kernel_cap_t *inheritable,
 676                      kernel_cap_t *permitted)
 677 {
 678         return call_int_hook(capget, 0, target,
 679                                 effective, inheritable, permitted);
 680 }
 681
 682 int security_capset(struct cred *new, const struct cred *old,
 683                     const kernel_cap_t *effective,
 684                     const kernel_cap_t *inheritable,
 685                     const kernel_cap_t *permitted)
 686 {
 687         return call_int_hook(capset, 0, new, old,
 688                                 effective, inheritable, permitted);
 689 }
 690
 691 int security_capable(const struct cred *cred,
 692                      struct user_namespace *ns,
 693                      int cap,
 694                      unsigned int opts)
 695 {
 696         return call_int_hook(capable, 0, cred, ns, cap, opts);
 697 }
 698
 699 int security_quotactl(int cmds, int type, int id, struct super_block *sb)
 700 {
 701         return call_int_hook(quotactl, 0, cmds, type, id, sb);
 702 }
 703
 704 int security_quota_on(struct dentry *dentry)
 705 {
 706         return call_int_hook(quota_on, 0, dentry);
 707 }
 708
 709 int security_syslog(int type)
 710 {
 711         return call_int_hook(syslog, 0, type);
 712 }
 713
 714 int security_settime64(const struct timespec64 *ts, const struct timezone *tz)
 715 {
 716         return call_int_hook(settime, 0, ts, tz);
 717 }
 718
 719 int security_vm_enough_memory_mm(struct mm_struct *mm, long pages)
 720 {
 721         struct security_hook_list *hp;
 722         int cap_sys_admin = 1;
 723         int rc;
 724
 725         /*
 726          * The module will respond with a positive value if
 727          * it thinks the __vm_enough_memory() call should be
 728          * made with the cap_sys_admin set. If all of the modules
 729          * agree that it should be set it will. If any module
 730          * thinks it should not be set it won't.
 731          */
 732         hlist_for_each_entry(hp, &security_hook_heads.vm_enough_memory, list) {
 733                 rc = hp->hook.vm_enough_memory(mm, pages);
 734                 if (rc <= 0) {
 735                         cap_sys_admin = 0;
 736                         break;
 737                 }
 738         }
 739         return __vm_enough_memory(mm, pages, cap_sys_admin);
 740 }
 741
 742 int security_bprm_set_creds(struct linux_binprm *bprm)
 743 {
 744         return call_int_hook(bprm_set_creds, 0, bprm);
 745 }
 746
 747 int security_bprm_check(struct linux_binprm *bprm)
 748 {
 749         int ret;
 750
 751         ret = call_int_hook(bprm_check_security, 0, bprm);
 752         if (ret)
 753                 return ret;
 754         return ima_bprm_check(bprm);
 755 }
 756
 757 void security_bprm_committing_creds(struct linux_binprm *bprm)
 758 {
 759         call_void_hook(bprm_committing_creds, bprm);
 760 }
 761
 762 void security_bprm_committed_creds(struct linux_binprm *bprm)
 763 {
 764         call_void_hook(bprm_committed_creds, bprm);
 765 }
 766
 767 int security_fs_context_dup(struct fs_context *fc, struct fs_context *src_fc)
 768 {
 769         return call_int_hook(fs_context_dup, 0, fc, src_fc);
 770 }
 771
 772 int security_fs_context_parse_param(struct fs_context *fc, struct fs_parameter *param)
 773 {
 774         return call_int_hook(fs_context_parse_param, -ENOPARAM, fc, param);
 775 }
 776
 777 int security_sb_alloc(struct super_block *sb)
 778 {
 779         return call_int_hook(sb_alloc_security, 0, sb);
 780 }
 781
 782 void security_sb_free(struct super_block *sb)
 783 {
 784         call_void_hook(sb_free_security, sb);
 785 }
 786
 787 void security_free_mnt_opts(void **mnt_opts)
 788 {
 789         if (!*mnt_opts)
 790                 return;
 791         call_void_hook(sb_free_mnt_opts, *mnt_opts);
 792         *mnt_opts = NULL;
 793 }
 794 EXPORT_SYMBOL(security_free_mnt_opts);
 795
 796 int security_sb_eat_lsm_opts(char *options, void **mnt_opts)
 797 {
 798         return call_int_hook(sb_eat_lsm_opts, 0, options, mnt_opts);
 799 }
 800 EXPORT_SYMBOL(security_sb_eat_lsm_opts);
 801
 802 int security_sb_remount(struct super_block *sb,
 803                         void *mnt_opts)
 804 {
 805         return call_int_hook(sb_remount, 0, sb, mnt_opts);
 806 }
 807 EXPORT_SYMBOL(security_sb_remount);
 808
 809 int security_sb_kern_mount(struct super_block *sb)
 810 {
 811         return call_int_hook(sb_kern_mount, 0, sb);
 812 }
 813
 814 int security_sb_show_options(struct seq_file *m, struct super_block *sb)
 815 {
 816         return call_int_hook(sb_show_options, 0, m, sb);
 817 }
 818
 819 int security_sb_statfs(struct dentry *dentry)
 820 {
 821         return call_int_hook(sb_statfs, 0, dentry);
 822 }
 823
 824 int security_sb_mount(const char *dev_name, const struct path *path,
 825                        const char *type, unsigned long flags, void *data)
 826 {
 827         return call_int_hook(sb_mount, 0, dev_name, path, type, flags, data);
 828 }
 829
 830 int security_sb_umount(struct vfsmount *mnt, int flags)
 831 {
 832         return call_int_hook(sb_umount, 0, mnt, flags);
 833 }
 834
 835 int security_sb_pivotroot(const struct path *old_path, const struct path *new_path)
 836 {
 837         return call_int_hook(sb_pivotroot, 0, old_path, new_path);
 838 }
 839
 840 int security_sb_set_mnt_opts(struct super_block *sb,
 841                                 void *mnt_opts,
 842                                 unsigned long kern_flags,
 843                                 unsigned long *set_kern_flags)
 844 {
 845         return call_int_hook(sb_set_mnt_opts,
 846                                 mnt_opts ? -EOPNOTSUPP : 0, sb,
 847                                 mnt_opts, kern_flags, set_kern_flags);
 848 }
 849 EXPORT_SYMBOL(security_sb_set_mnt_opts);
 850
 851 int security_sb_clone_mnt_opts(const struct super_block *oldsb,
 852                                 struct super_block *newsb,
 853                                 unsigned long kern_flags,
 854                                 unsigned long *set_kern_flags)
 855 {
 856         return call_int_hook(sb_clone_mnt_opts, 0, oldsb, newsb,
 857                                 kern_flags, set_kern_flags);
 858 }
 859 EXPORT_SYMBOL(security_sb_clone_mnt_opts);
 860
 861 int security_add_mnt_opt(const char *option, const char *val, int len,
 862                          void **mnt_opts)
 863 {
 864         return call_int_hook(sb_add_mnt_opt, -EINVAL,
 865                                         option, val, len, mnt_opts);
 866 }
 867 EXPORT_SYMBOL(security_add_mnt_opt);
 868
 869 int security_move_mount(const struct path *from_path, const struct path *to_path)
 870 {
 871         return call_int_hook(move_mount, 0, from_path, to_path);
 872 }
 873
 874 int security_path_notify(const struct path *path, u64 mask,
 875                                 unsigned int obj_type)
 876 {
 877         return call_int_hook(path_notify, 0, path, mask, obj_type);
 878 }
 879
 880 int security_inode_alloc(struct inode *inode)
 881 {
 882         int rc = lsm_inode_alloc(inode);
 883
 884         if (unlikely(rc))
 885                 return rc;
 886         rc = call_int_hook(inode_alloc_security, 0, inode);
 887         if (unlikely(rc))
 888                 security_inode_free(inode);
 889         return rc;
 890 }
 891
 892 static void inode_free_by_rcu(struct rcu_head *head)
 893 {
 894         /*
 895          * The rcu head is at the start of the inode blob
 896          */
 897         kmem_cache_free(lsm_inode_cache, head);
 898 }
 899
 900 void security_inode_free(struct inode *inode)
 901 {
 902         integrity_inode_free(inode);
 903         call_void_hook(inode_free_security, inode);
 904         /*
 905          * The inode may still be referenced in a path walk and
 906          * a call to security_inode_permission() can be made
 907          * after inode_free_security() is called. Ideally, the VFS
 908          * wouldn't do this, but fixing that is a much harder
 909          * job. For now, simply free the i_security via RCU, and
 910          * leave the current inode->i_security pointer intact.
 911          * The inode will be freed after the RCU grace period too.
 912          */
 913         if (inode->i_security)
 914                 call_rcu((struct rcu_head *)inode->i_security,
 915                                 inode_free_by_rcu);
 916 }
 917
 918 int security_dentry_init_security(struct dentry *dentry, int mode,
 919                                         const struct qstr *name, void **ctx,
 920                                         u32 *ctxlen)
 921 {
 922         return call_int_hook(dentry_init_security, -EOPNOTSUPP, dentry, mode,
 923                                 name, ctx, ctxlen);
 924 }
 925 EXPORT_SYMBOL(security_dentry_init_security);
 926
 927 int security_dentry_create_files_as(struct dentry *dentry, int mode,
 928                                     struct qstr *name,
 929                                     const struct cred *old, struct cred *new)
 930 {
 931         return call_int_hook(dentry_create_files_as, 0, dentry, mode,
 932                                 name, old, new);
 933 }
 934 EXPORT_SYMBOL(security_dentry_create_files_as);
 935
 936 int security_inode_init_security(struct inode *inode, struct inode *dir,
 937                                  const struct qstr *qstr,
 938                                  const initxattrs initxattrs, void *fs_data)
 939 {
 940         struct xattr new_xattrs[MAX_LSM_EVM_XATTR + 1];
 941         struct xattr *lsm_xattr, *evm_xattr, *xattr;
 942         int ret;
 943
 944         if (unlikely(IS_PRIVATE(inode)))
 945                 return 0;
 946
 947         if (!initxattrs)
 948                 return call_int_hook(inode_init_security, -EOPNOTSUPP, inode,
 949                                      dir, qstr, NULL, NULL, NULL);
 950         memset(new_xattrs, 0, sizeof(new_xattrs));
 951         lsm_xattr = new_xattrs;
 952         ret = call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir, qstr,
 953                                                 &lsm_xattr->name,
 954                                                 &lsm_xattr->value,
 955                                                 &lsm_xattr->value_len);
 956         if (ret)
 957                 goto out;
 958
 959         evm_xattr = lsm_xattr + 1;
 960         ret = evm_inode_init_security(inode, lsm_xattr, evm_xattr);
 961         if (ret)
 962                 goto out;
 963         ret = initxattrs(inode, new_xattrs, fs_data);
 964 out:
 965         for (xattr = new_xattrs; xattr->value != NULL; xattr++)
 966                 kfree(xattr->value);
 967         return (ret == -EOPNOTSUPP) ? 0 : ret;
 968 }
 969 EXPORT_SYMBOL(security_inode_init_security);
 970
 971 int security_old_inode_init_security(struct inode *inode, struct inode *dir,
 972                                      const struct qstr *qstr, const char **name,
 973                                      void **value, size_t *len)
 974 {
 975         if (unlikely(IS_PRIVATE(inode)))
 976                 return -EOPNOTSUPP;
 977         return call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir,
 978                              qstr, name, value, len);
 979 }
 980 EXPORT_SYMBOL(security_old_inode_init_security);
 981
 982 #ifdef CONFIG_SECURITY_PATH
 983 int security_path_mknod(const struct path *dir, struct dentry *dentry, umode_t mode,
 984                         unsigned int dev)
 985 {
 986         if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
 987                 return 0;
 988         return call_int_hook(path_mknod, 0, dir, dentry, mode, dev);
 989 }
 990 EXPORT_SYMBOL(security_path_mknod);
 991
 992 int security_path_mkdir(const struct path *dir, struct dentry *dentry, umode_t mode)
 993 {
 994         if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
 995                 return 0;
 996         return call_int_hook(path_mkdir, 0, dir, dentry, mode);
 997 }
 998 EXPORT_SYMBOL(security_path_mkdir);
 999
1000 int security_path_rmdir(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_rmdir, 0, dir, dentry);
1005 }
1006
1007 int security_path_unlink(const struct path *dir, struct dentry *dentry)
1008 {
1009         if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
1010                 return 0;
1011         return call_int_hook(path_unlink, 0, dir, dentry);
1012 }
1013 EXPORT_SYMBOL(security_path_unlink);
1014
1015 int security_path_symlink(const struct path *dir, struct dentry *dentry,
1016                           const char *old_name)
1017 {
1018         if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
1019                 return 0;
1020         return call_int_hook(path_symlink, 0, dir, dentry, old_name);
1021 }
1022
1023 int security_path_link(struct dentry *old_dentry, const struct path *new_dir,
1024                        struct dentry *new_dentry)
1025 {
1026         if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry))))
1027                 return 0;
1028         return call_int_hook(path_link, 0, old_dentry, new_dir, new_dentry);
1029 }
1030
1031 int security_path_rename(const struct path *old_dir, struct dentry *old_dentry,
1032                          const struct path *new_dir, struct dentry *new_dentry,
1033                          unsigned int flags)
1034 {
1035         if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) ||
1036                      (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry)))))
1037                 return 0;
1038
1039         if (flags & RENAME_EXCHANGE) {
1040                 int err = call_int_hook(path_rename, 0, new_dir, new_dentry,
1041                                         old_dir, old_dentry);
1042                 if (err)
1043                         return err;
1044         }
1045
1046         return call_int_hook(path_rename, 0, old_dir, old_dentry, new_dir,
1047                                 new_dentry);
1048 }
1049 EXPORT_SYMBOL(security_path_rename);
1050
1051 int security_path_truncate(const struct path *path)
1052 {
1053         if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
1054                 return 0;
1055         return call_int_hook(path_truncate, 0, path);
1056 }
1057
1058 int security_path_chmod(const struct path *path, umode_t mode)
1059 {
1060         if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
1061                 return 0;
1062         return call_int_hook(path_chmod, 0, path, mode);
1063 }
1064
1065 int security_path_chown(const struct path *path, kuid_t uid, kgid_t gid)
1066 {
1067         if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
1068                 return 0;
1069         return call_int_hook(path_chown, 0, path, uid, gid);
1070 }
1071
1072 int security_path_chroot(const struct path *path)
1073 {
1074         return call_int_hook(path_chroot, 0, path);
1075 }
1076 #endif
1077
1078 int security_inode_create(struct inode *dir, struct dentry *dentry, umode_t mode)
1079 {
1080         if (unlikely(IS_PRIVATE(dir)))
1081                 return 0;
1082         return call_int_hook(inode_create, 0, dir, dentry, mode);
1083 }
1084 EXPORT_SYMBOL_GPL(security_inode_create);
1085
1086 int security_inode_link(struct dentry *old_dentry, struct inode *dir,
1087                          struct dentry *new_dentry)
1088 {
1089         if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry))))
1090                 return 0;
1091         return call_int_hook(inode_link, 0, old_dentry, dir, new_dentry);
1092 }
1093
1094 int security_inode_unlink(struct inode *dir, struct dentry *dentry)
1095 {
1096         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1097                 return 0;
1098         return call_int_hook(inode_unlink, 0, dir, dentry);
1099 }
1100
1101 int security_inode_symlink(struct inode *dir, struct dentry *dentry,
1102                             const char *old_name)
1103 {
1104         if (unlikely(IS_PRIVATE(dir)))
1105                 return 0;
1106         return call_int_hook(inode_symlink, 0, dir, dentry, old_name);
1107 }
1108
1109 int security_inode_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
1110 {
1111         if (unlikely(IS_PRIVATE(dir)))
1112                 return 0;
1113         return call_int_hook(inode_mkdir, 0, dir, dentry, mode);
1114 }
1115 EXPORT_SYMBOL_GPL(security_inode_mkdir);
1116
1117 int security_inode_rmdir(struct inode *dir, struct dentry *dentry)
1118 {
1119         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1120                 return 0;
1121         return call_int_hook(inode_rmdir, 0, dir, dentry);
1122 }
1123
1124 int security_inode_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t dev)
1125 {
1126         if (unlikely(IS_PRIVATE(dir)))
1127                 return 0;
1128         return call_int_hook(inode_mknod, 0, dir, dentry, mode, dev);
1129 }
1130
1131 int security_inode_rename(struct inode *old_dir, struct dentry *old_dentry,
1132                            struct inode *new_dir, struct dentry *new_dentry,
1133                            unsigned int flags)
1134 {
1135         if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) ||
1136             (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry)))))
1137                 return 0;
1138
1139         if (flags & RENAME_EXCHANGE) {
1140                 int err = call_int_hook(inode_rename, 0, new_dir, new_dentry,
1141                                                      old_dir, old_dentry);
1142                 if (err)
1143                         return err;
1144         }
1145
1146         return call_int_hook(inode_rename, 0, old_dir, old_dentry,
1147                                            new_dir, new_dentry);
1148 }
1149
1150 int security_inode_readlink(struct dentry *dentry)
1151 {
1152         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1153                 return 0;
1154         return call_int_hook(inode_readlink, 0, dentry);
1155 }
1156
1157 int security_inode_follow_link(struct dentry *dentry, struct inode *inode,
1158                                bool rcu)
1159 {
1160         if (unlikely(IS_PRIVATE(inode)))
1161                 return 0;
1162         return call_int_hook(inode_follow_link, 0, dentry, inode, rcu);
1163 }
1164
1165 int security_inode_permission(struct inode *inode, int mask)
1166 {
1167         if (unlikely(IS_PRIVATE(inode)))
1168                 return 0;
1169         return call_int_hook(inode_permission, 0, inode, mask);
1170 }
1171
1172 int security_inode_setattr(struct dentry *dentry, struct iattr *attr)
1173 {
1174         int ret;
1175
1176         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1177                 return 0;
1178         ret = call_int_hook(inode_setattr, 0, dentry, attr);
1179         if (ret)
1180                 return ret;
1181         return evm_inode_setattr(dentry, attr);
1182 }
1183 EXPORT_SYMBOL_GPL(security_inode_setattr);
1184
1185 int security_inode_getattr(const struct path *path)
1186 {
1187         if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
1188                 return 0;
1189         return call_int_hook(inode_getattr, 0, path);
1190 }
1191
1192 int security_inode_setxattr(struct dentry *dentry, const char *name,
1193                             const void *value, size_t size, int flags)
1194 {
1195         int ret;
1196
1197         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1198                 return 0;
1199         /*
1200          * SELinux and Smack integrate the cap call,
1201          * so assume that all LSMs supplying this call do so.
1202          */
1203         ret = call_int_hook(inode_setxattr, 1, dentry, name, value, size,
1204                                 flags);
1205
1206         if (ret == 1)
1207                 ret = cap_inode_setxattr(dentry, name, value, size, flags);
1208         if (ret)
1209                 return ret;
1210         ret = ima_inode_setxattr(dentry, name, value, size);
1211         if (ret)
1212                 return ret;
1213         return evm_inode_setxattr(dentry, name, value, size);
1214 }
1215
1216 void security_inode_post_setxattr(struct dentry *dentry, const char *name,
1217                                   const void *value, size_t size, int flags)
1218 {
1219         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1220                 return;
1221         call_void_hook(inode_post_setxattr, dentry, name, value, size, flags);
1222         evm_inode_post_setxattr(dentry, name, value, size);
1223 }
1224
1225 int security_inode_getxattr(struct dentry *dentry, const char *name)
1226 {
1227         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1228                 return 0;
1229         return call_int_hook(inode_getxattr, 0, dentry, name);
1230 }
1231
1232 int security_inode_listxattr(struct dentry *dentry)
1233 {
1234         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1235                 return 0;
1236         return call_int_hook(inode_listxattr, 0, dentry);
1237 }
1238
1239 int security_inode_removexattr(struct dentry *dentry, const char *name)
1240 {
1241         int ret;
1242
1243         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1244                 return 0;
1245         /*
1246          * SELinux and Smack integrate the cap call,
1247          * so assume that all LSMs supplying this call do so.
1248          */
1249         ret = call_int_hook(inode_removexattr, 1, dentry, name);
1250         if (ret == 1)
1251                 ret = cap_inode_removexattr(dentry, name);
1252         if (ret)
1253                 return ret;
1254         ret = ima_inode_removexattr(dentry, name);
1255         if (ret)
1256                 return ret;
1257         return evm_inode_removexattr(dentry, name);
1258 }
1259
1260 int security_inode_need_killpriv(struct dentry *dentry)
1261 {
1262         return call_int_hook(inode_need_killpriv, 0, dentry);
1263 }
1264
1265 int security_inode_killpriv(struct dentry *dentry)
1266 {
1267         return call_int_hook(inode_killpriv, 0, dentry);
1268 }
1269
1270 int security_inode_getsecurity(struct inode *inode, const char *name, void **buffer, bool alloc)
1271 {
1272         struct security_hook_list *hp;
1273         int rc;
1274
1275         if (unlikely(IS_PRIVATE(inode)))
1276                 return -EOPNOTSUPP;
1277         /*
1278          * Only one module will provide an attribute with a given name.
1279          */
1280         hlist_for_each_entry(hp, &security_hook_heads.inode_getsecurity, list) {
1281                 rc = hp->hook.inode_getsecurity(inode, name, buffer, alloc);
1282                 if (rc != -EOPNOTSUPP)
1283                         return rc;
1284         }
1285         return -EOPNOTSUPP;
1286 }
1287
1288 int security_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags)
1289 {
1290         struct security_hook_list *hp;
1291         int rc;
1292
1293         if (unlikely(IS_PRIVATE(inode)))
1294                 return -EOPNOTSUPP;
1295         /*
1296          * Only one module will provide an attribute with a given name.
1297          */
1298         hlist_for_each_entry(hp, &security_hook_heads.inode_setsecurity, list) {
1299                 rc = hp->hook.inode_setsecurity(inode, name, value, size,
1300                                                                 flags);
1301                 if (rc != -EOPNOTSUPP)
1302                         return rc;
1303         }
1304         return -EOPNOTSUPP;
1305 }
1306
1307 int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size)
1308 {
1309         if (unlikely(IS_PRIVATE(inode)))
1310                 return 0;
1311         return call_int_hook(inode_listsecurity, 0, inode, buffer, buffer_size);
1312 }
1313 EXPORT_SYMBOL(security_inode_listsecurity);
1314
1315 void security_inode_getsecid(struct inode *inode, u32 *secid)
1316 {
1317         call_void_hook(inode_getsecid, inode, secid);
1318 }
1319
1320 int security_inode_copy_up(struct dentry *src, struct cred **new)
1321 {
1322         return call_int_hook(inode_copy_up, 0, src, new);
1323 }
1324 EXPORT_SYMBOL(security_inode_copy_up);
1325
1326 int security_inode_copy_up_xattr(const char *name)
1327 {
1328         return call_int_hook(inode_copy_up_xattr, -EOPNOTSUPP, name);
1329 }
1330 EXPORT_SYMBOL(security_inode_copy_up_xattr);
1331
1332 int security_kernfs_init_security(struct kernfs_node *kn_dir,
1333                                   struct kernfs_node *kn)
1334 {
1335         return call_int_hook(kernfs_init_security, 0, kn_dir, kn);
1336 }
1337
1338 int security_file_permission(struct file *file, int mask)
1339 {
1340         int ret;
1341
1342         ret = call_int_hook(file_permission, 0, file, mask);
1343         if (ret)
1344                 return ret;
1345
1346         return fsnotify_perm(file, mask);
1347 }
1348
1349 int security_file_alloc(struct file *file)
1350 {
1351         int rc = lsm_file_alloc(file);
1352
1353         if (rc)
1354                 return rc;
1355         rc = call_int_hook(file_alloc_security, 0, file);
1356         if (unlikely(rc))
1357                 security_file_free(file);
1358         return rc;
1359 }
1360
1361 void security_file_free(struct file *file)
1362 {
1363         void *blob;
1364
1365         call_void_hook(file_free_security, file);
1366
1367         blob = file->f_security;
1368         if (blob) {
1369                 file->f_security = NULL;
1370                 kmem_cache_free(lsm_file_cache, blob);
1371         }
1372 }
1373
1374 int security_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1375 {
1376         return call_int_hook(file_ioctl, 0, file, cmd, arg);
1377 }
1378
1379 static inline unsigned long mmap_prot(struct file *file, unsigned long prot)
1380 {
1381         /*
1382          * Does we have PROT_READ and does the application expect
1383          * it to imply PROT_EXEC?  If not, nothing to talk about...
1384          */
1385         if ((prot & (PROT_READ | PROT_EXEC)) != PROT_READ)
1386                 return prot;
1387         if (!(current->personality & READ_IMPLIES_EXEC))
1388                 return prot;
1389         /*
1390          * if that's an anonymous mapping, let it.
1391          */
1392         if (!file)
1393                 return prot | PROT_EXEC;
1394         /*
1395          * ditto if it's not on noexec mount, except that on !MMU we need
1396          * NOMMU_MAP_EXEC (== VM_MAYEXEC) in this case
1397          */
1398         if (!path_noexec(&file->f_path)) {
1399 #ifndef CONFIG_MMU
1400                 if (file->f_op->mmap_capabilities) {
1401                         unsigned caps = file->f_op->mmap_capabilities(file);
1402                         if (!(caps & NOMMU_MAP_EXEC))
1403                                 return prot;
1404                 }
1405 #endif
1406                 return prot | PROT_EXEC;
1407         }
1408         /* anything on noexec mount won't get PROT_EXEC */
1409         return prot;
1410 }
1411
1412 int security_mmap_file(struct file *file, unsigned long prot,
1413                         unsigned long flags)
1414 {
1415         int ret;
1416         ret = call_int_hook(mmap_file, 0, file, prot,
1417                                         mmap_prot(file, prot), flags);
1418         if (ret)
1419                 return ret;
1420         return ima_file_mmap(file, prot);
1421 }
1422
1423 int security_mmap_addr(unsigned long addr)
1424 {
1425         return call_int_hook(mmap_addr, 0, addr);
1426 }
1427
1428 int security_file_mprotect(struct vm_area_struct *vma, unsigned long reqprot,
1429                             unsigned long prot)
1430 {
1431         return call_int_hook(file_mprotect, 0, vma, reqprot, prot);
1432 }
1433
1434 int security_file_lock(struct file *file, unsigned int cmd)
1435 {
1436         return call_int_hook(file_lock, 0, file, cmd);
1437 }
1438
1439 int security_file_fcntl(struct file *file, unsigned int cmd, unsigned long arg)
1440 {
1441         return call_int_hook(file_fcntl, 0, file, cmd, arg);
1442 }
1443
1444 void security_file_set_fowner(struct file *file)
1445 {
1446         call_void_hook(file_set_fowner, file);
1447 }
1448
1449 int security_file_send_sigiotask(struct task_struct *tsk,
1450                                   struct fown_struct *fown, int sig)
1451 {
1452         return call_int_hook(file_send_sigiotask, 0, tsk, fown, sig);
1453 }
1454
1455 int security_file_receive(struct file *file)
1456 {
1457         return call_int_hook(file_receive, 0, file);
1458 }
1459
1460 int security_file_open(struct file *file)
1461 {
1462         int ret;
1463
1464         ret = call_int_hook(file_open, 0, file);
1465         if (ret)
1466                 return ret;
1467
1468         return fsnotify_perm(file, MAY_OPEN);
1469 }
1470
1471 int security_task_alloc(struct task_struct *task, unsigned long clone_flags)
1472 {
1473         int rc = lsm_task_alloc(task);
1474
1475         if (rc)
1476                 return rc;
1477         rc = call_int_hook(task_alloc, 0, task, clone_flags);
1478         if (unlikely(rc))
1479                 security_task_free(task);
1480         return rc;
1481 }
1482
1483 void security_task_free(struct task_struct *task)
1484 {
1485         call_void_hook(task_free, task);
1486
1487         kfree(task->security);
1488         task->security = NULL;
1489 }
1490
1491 int security_cred_alloc_blank(struct cred *cred, gfp_t gfp)
1492 {
1493         int rc = lsm_cred_alloc(cred, gfp);
1494
1495         if (rc)
1496                 return rc;
1497
1498         rc = call_int_hook(cred_alloc_blank, 0, cred, gfp);
1499         if (unlikely(rc))
1500                 security_cred_free(cred);
1501         return rc;
1502 }
1503
1504 void security_cred_free(struct cred *cred)
1505 {
1506         /*
1507          * There is a failure case in prepare_creds() that
1508          * may result in a call here with ->security being NULL.
1509          */
1510         if (unlikely(cred->security == NULL))
1511                 return;
1512
1513         call_void_hook(cred_free, cred);
1514
1515         kfree(cred->security);
1516         cred->security = NULL;
1517 }
1518
1519 int security_prepare_creds(struct cred *new, const struct cred *old, gfp_t gfp)
1520 {
1521         int rc = lsm_cred_alloc(new, gfp);
1522
1523         if (rc)
1524                 return rc;
1525
1526         rc = call_int_hook(cred_prepare, 0, new, old, gfp);
1527         if (unlikely(rc))
1528                 security_cred_free(new);
1529         return rc;
1530 }
1531
1532 void security_transfer_creds(struct cred *new, const struct cred *old)
1533 {
1534         call_void_hook(cred_transfer, new, old);
1535 }
1536
1537 void security_cred_getsecid(const struct cred *c, u32 *secid)
1538 {
1539         *secid = 0;
1540         call_void_hook(cred_getsecid, c, secid);
1541 }
1542 EXPORT_SYMBOL(security_cred_getsecid);
1543
1544 int security_kernel_act_as(struct cred *new, u32 secid)
1545 {
1546         return call_int_hook(kernel_act_as, 0, new, secid);
1547 }
1548
1549 int security_kernel_create_files_as(struct cred *new, struct inode *inode)
1550 {
1551         return call_int_hook(kernel_create_files_as, 0, new, inode);
1552 }
1553
1554 int security_kernel_module_request(char *kmod_name)
1555 {
1556         int ret;
1557
1558         ret = call_int_hook(kernel_module_request, 0, kmod_name);
1559         if (ret)
1560                 return ret;
1561         return integrity_kernel_module_request(kmod_name);
1562 }
1563
1564 int security_kernel_read_file(struct file *file, enum kernel_read_file_id id)
1565 {
1566         int ret;
1567
1568         ret = call_int_hook(kernel_read_file, 0, file, id);
1569         if (ret)
1570                 return ret;
1571         return ima_read_file(file, id);
1572 }
1573 EXPORT_SYMBOL_GPL(security_kernel_read_file);
1574
1575 int security_kernel_post_read_file(struct file *file, char *buf, loff_t size,
1576                                    enum kernel_read_file_id id)
1577 {
1578         int ret;
1579
1580         ret = call_int_hook(kernel_post_read_file, 0, file, buf, size, id);
1581         if (ret)
1582                 return ret;
1583         return ima_post_read_file(file, buf, size, id);
1584 }
1585 EXPORT_SYMBOL_GPL(security_kernel_post_read_file);
1586
1587 int security_kernel_load_data(enum kernel_load_data_id id)
1588 {
1589         int ret;
1590
1591         ret = call_int_hook(kernel_load_data, 0, id);
1592         if (ret)
1593                 return ret;
1594         return ima_load_data(id);
1595 }
1596 EXPORT_SYMBOL_GPL(security_kernel_load_data);
1597
1598 int security_task_fix_setuid(struct cred *new, const struct cred *old,
1599                              int flags)
1600 {
1601         return call_int_hook(task_fix_setuid, 0, new, old, flags);
1602 }
1603
1604 int security_task_setpgid(struct task_struct *p, pid_t pgid)
1605 {
1606         return call_int_hook(task_setpgid, 0, p, pgid);
1607 }
1608
1609 int security_task_getpgid(struct task_struct *p)
1610 {
1611         return call_int_hook(task_getpgid, 0, p);
1612 }
1613
1614 int security_task_getsid(struct task_struct *p)
1615 {
1616         return call_int_hook(task_getsid, 0, p);
1617 }
1618
1619 void security_task_getsecid(struct task_struct *p, u32 *secid)
1620 {
1621         *secid = 0;
1622         call_void_hook(task_getsecid, p, secid);
1623 }
1624 EXPORT_SYMBOL(security_task_getsecid);
1625
1626 int security_task_setnice(struct task_struct *p, int nice)
1627 {
1628         return call_int_hook(task_setnice, 0, p, nice);
1629 }
1630
1631 int security_task_setioprio(struct task_struct *p, int ioprio)
1632 {
1633         return call_int_hook(task_setioprio, 0, p, ioprio);
1634 }
1635
1636 int security_task_getioprio(struct task_struct *p)
1637 {
1638         return call_int_hook(task_getioprio, 0, p);
1639 }
1640
1641 int security_task_prlimit(const struct cred *cred, const struct cred *tcred,
1642                           unsigned int flags)
1643 {
1644         return call_int_hook(task_prlimit, 0, cred, tcred, flags);
1645 }
1646
1647 int security_task_setrlimit(struct task_struct *p, unsigned int resource,
1648                 struct rlimit *new_rlim)
1649 {
1650         return call_int_hook(task_setrlimit, 0, p, resource, new_rlim);
1651 }
1652
1653 int security_task_setscheduler(struct task_struct *p)
1654 {
1655         return call_int_hook(task_setscheduler, 0, p);
1656 }
1657
1658 int security_task_getscheduler(struct task_struct *p)
1659 {
1660         return call_int_hook(task_getscheduler, 0, p);
1661 }
1662
1663 int security_task_movememory(struct task_struct *p)
1664 {
1665         return call_int_hook(task_movememory, 0, p);
1666 }
1667
1668 int security_task_kill(struct task_struct *p, struct kernel_siginfo *info,
1669                         int sig, const struct cred *cred)
1670 {
1671         return call_int_hook(task_kill, 0, p, info, sig, cred);
1672 }
1673
1674 int security_task_prctl(int option, unsigned long arg2, unsigned long arg3,
1675                          unsigned long arg4, unsigned long arg5)
1676 {
1677         int thisrc;
1678         int rc = -ENOSYS;
1679         struct security_hook_list *hp;
1680
1681         hlist_for_each_entry(hp, &security_hook_heads.task_prctl, list) {
1682                 thisrc = hp->hook.task_prctl(option, arg2, arg3, arg4, arg5);
1683                 if (thisrc != -ENOSYS) {
1684                         rc = thisrc;
1685                         if (thisrc != 0)
1686                                 break;
1687                 }
1688         }
1689         return rc;
1690 }
1691
1692 void security_task_to_inode(struct task_struct *p, struct inode *inode)
1693 {
1694         call_void_hook(task_to_inode, p, inode);
1695 }
1696
1697 int security_ipc_permission(struct kern_ipc_perm *ipcp, short flag)
1698 {
1699         return call_int_hook(ipc_permission, 0, ipcp, flag);
1700 }
1701
1702 void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid)
1703 {
1704         *secid = 0;
1705         call_void_hook(ipc_getsecid, ipcp, secid);
1706 }
1707
1708 int security_msg_msg_alloc(struct msg_msg *msg)
1709 {
1710         int rc = lsm_msg_msg_alloc(msg);
1711
1712         if (unlikely(rc))
1713                 return rc;
1714         rc = call_int_hook(msg_msg_alloc_security, 0, msg);
1715         if (unlikely(rc))
1716                 security_msg_msg_free(msg);
1717         return rc;
1718 }
1719
1720 void security_msg_msg_free(struct msg_msg *msg)
1721 {
1722         call_void_hook(msg_msg_free_security, msg);
1723         kfree(msg->security);
1724         msg->security = NULL;
1725 }
1726
1727 int security_msg_queue_alloc(struct kern_ipc_perm *msq)
1728 {
1729         int rc = lsm_ipc_alloc(msq);
1730
1731         if (unlikely(rc))
1732                 return rc;
1733         rc = call_int_hook(msg_queue_alloc_security, 0, msq);
1734         if (unlikely(rc))
1735                 security_msg_queue_free(msq);
1736         return rc;
1737 }
1738
1739 void security_msg_queue_free(struct kern_ipc_perm *msq)
1740 {
1741         call_void_hook(msg_queue_free_security, msq);
1742         kfree(msq->security);
1743         msq->security = NULL;
1744 }
1745
1746 int security_msg_queue_associate(struct kern_ipc_perm *msq, int msqflg)
1747 {
1748         return call_int_hook(msg_queue_associate, 0, msq, msqflg);
1749 }
1750
1751 int security_msg_queue_msgctl(struct kern_ipc_perm *msq, int cmd)
1752 {
1753         return call_int_hook(msg_queue_msgctl, 0, msq, cmd);
1754 }
1755
1756 int security_msg_queue_msgsnd(struct kern_ipc_perm *msq,
1757                                struct msg_msg *msg, int msqflg)
1758 {
1759         return call_int_hook(msg_queue_msgsnd, 0, msq, msg, msqflg);
1760 }
1761
1762 int security_msg_queue_msgrcv(struct kern_ipc_perm *msq, struct msg_msg *msg,
1763                                struct task_struct *target, long type, int mode)
1764 {
1765         return call_int_hook(msg_queue_msgrcv, 0, msq, msg, target, type, mode);
1766 }
1767
1768 int security_shm_alloc(struct kern_ipc_perm *shp)
1769 {
1770         int rc = lsm_ipc_alloc(shp);
1771
1772         if (unlikely(rc))
1773                 return rc;
1774         rc = call_int_hook(shm_alloc_security, 0, shp);
1775         if (unlikely(rc))
1776                 security_shm_free(shp);
1777         return rc;
1778 }
1779
1780 void security_shm_free(struct kern_ipc_perm *shp)
1781 {
1782         call_void_hook(shm_free_security, shp);
1783         kfree(shp->security);
1784         shp->security = NULL;
1785 }
1786
1787 int security_shm_associate(struct kern_ipc_perm *shp, int shmflg)
1788 {
1789         return call_int_hook(shm_associate, 0, shp, shmflg);
1790 }
1791
1792 int security_shm_shmctl(struct kern_ipc_perm *shp, int cmd)
1793 {
1794         return call_int_hook(shm_shmctl, 0, shp, cmd);
1795 }
1796
1797 int security_shm_shmat(struct kern_ipc_perm *shp, char __user *shmaddr, int shmflg)
1798 {
1799         return call_int_hook(shm_shmat, 0, shp, shmaddr, shmflg);
1800 }
1801
1802 int security_sem_alloc(struct kern_ipc_perm *sma)
1803 {
1804         int rc = lsm_ipc_alloc(sma);
1805
1806         if (unlikely(rc))
1807                 return rc;
1808         rc = call_int_hook(sem_alloc_security, 0, sma);
1809         if (unlikely(rc))
1810                 security_sem_free(sma);
1811         return rc;
1812 }
1813
1814 void security_sem_free(struct kern_ipc_perm *sma)
1815 {
1816         call_void_hook(sem_free_security, sma);
1817         kfree(sma->security);
1818         sma->security = NULL;
1819 }
1820
1821 int security_sem_associate(struct kern_ipc_perm *sma, int semflg)
1822 {
1823         return call_int_hook(sem_associate, 0, sma, semflg);
1824 }
1825
1826 int security_sem_semctl(struct kern_ipc_perm *sma, int cmd)
1827 {
1828         return call_int_hook(sem_semctl, 0, sma, cmd);
1829 }
1830
1831 int security_sem_semop(struct kern_ipc_perm *sma, struct sembuf *sops,
1832                         unsigned nsops, int alter)
1833 {
1834         return call_int_hook(sem_semop, 0, sma, sops, nsops, alter);
1835 }
1836
1837 void security_d_instantiate(struct dentry *dentry, struct inode *inode)
1838 {
1839         if (unlikely(inode && IS_PRIVATE(inode)))
1840                 return;
1841         call_void_hook(d_instantiate, dentry, inode);
1842 }
1843 EXPORT_SYMBOL(security_d_instantiate);
1844
1845 int security_getprocattr(struct task_struct *p, const char *lsm, char *name,
1846                                 char **value)
1847 {
1848         struct security_hook_list *hp;
1849
1850         hlist_for_each_entry(hp, &security_hook_heads.getprocattr, list) {
1851                 if (lsm != NULL && strcmp(lsm, hp->lsm))
1852                         continue;
1853                 return hp->hook.getprocattr(p, name, value);
1854         }
1855         return -EINVAL;
1856 }
1857
1858 int security_setprocattr(const char *lsm, const char *name, void *value,
1859                          size_t size)
1860 {
1861         struct security_hook_list *hp;
1862
1863         hlist_for_each_entry(hp, &security_hook_heads.setprocattr, list) {
1864                 if (lsm != NULL && strcmp(lsm, hp->lsm))
1865                         continue;
1866                 return hp->hook.setprocattr(name, value, size);
1867         }
1868         return -EINVAL;
1869 }
1870
1871 int security_netlink_send(struct sock *sk, struct sk_buff *skb)
1872 {
1873         return call_int_hook(netlink_send, 0, sk, skb);
1874 }
1875
1876 int security_ismaclabel(const char *name)
1877 {
1878         return call_int_hook(ismaclabel, 0, name);
1879 }
1880 EXPORT_SYMBOL(security_ismaclabel);
1881
1882 int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
1883 {
1884         return call_int_hook(secid_to_secctx, -EOPNOTSUPP, secid, secdata,
1885                                 seclen);
1886 }
1887 EXPORT_SYMBOL(security_secid_to_secctx);
1888
1889 int security_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid)
1890 {
1891         *secid = 0;
1892         return call_int_hook(secctx_to_secid, 0, secdata, seclen, secid);
1893 }
1894 EXPORT_SYMBOL(security_secctx_to_secid);
1895
1896 void security_release_secctx(char *secdata, u32 seclen)
1897 {
1898         call_void_hook(release_secctx, secdata, seclen);
1899 }
1900 EXPORT_SYMBOL(security_release_secctx);
1901
1902 void security_inode_invalidate_secctx(struct inode *inode)
1903 {
1904         call_void_hook(inode_invalidate_secctx, inode);
1905 }
1906 EXPORT_SYMBOL(security_inode_invalidate_secctx);
1907
1908 int security_inode_notifysecctx(struct inode *inode, void *ctx, u32 ctxlen)
1909 {
1910         return call_int_hook(inode_notifysecctx, 0, inode, ctx, ctxlen);
1911 }
1912 EXPORT_SYMBOL(security_inode_notifysecctx);
1913
1914 int security_inode_setsecctx(struct dentry *dentry, void *ctx, u32 ctxlen)
1915 {
1916         return call_int_hook(inode_setsecctx, 0, dentry, ctx, ctxlen);
1917 }
1918 EXPORT_SYMBOL(security_inode_setsecctx);
1919
1920 int security_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen)
1921 {
1922         return call_int_hook(inode_getsecctx, -EOPNOTSUPP, inode, ctx, ctxlen);
1923 }
1924 EXPORT_SYMBOL(security_inode_getsecctx);
1925
1926 #ifdef CONFIG_SECURITY_NETWORK
1927
1928 int security_unix_stream_connect(struct sock *sock, struct sock *other, struct sock *newsk)
1929 {
1930         return call_int_hook(unix_stream_connect, 0, sock, other, newsk);
1931 }
1932 EXPORT_SYMBOL(security_unix_stream_connect);
1933
1934 int security_unix_may_send(struct socket *sock,  struct socket *other)
1935 {
1936         return call_int_hook(unix_may_send, 0, sock, other);
1937 }
1938 EXPORT_SYMBOL(security_unix_may_send);
1939
1940 int security_socket_create(int family, int type, int protocol, int kern)
1941 {
1942         return call_int_hook(socket_create, 0, family, type, protocol, kern);
1943 }
1944
1945 int security_socket_post_create(struct socket *sock, int family,
1946                                 int type, int protocol, int kern)
1947 {
1948         return call_int_hook(socket_post_create, 0, sock, family, type,
1949                                                 protocol, kern);
1950 }
1951
1952 int security_socket_socketpair(struct socket *socka, struct socket *sockb)
1953 {
1954         return call_int_hook(socket_socketpair, 0, socka, sockb);
1955 }
1956 EXPORT_SYMBOL(security_socket_socketpair);
1957
1958 int security_socket_bind(struct socket *sock, struct sockaddr *address, int addrlen)
1959 {
1960         return call_int_hook(socket_bind, 0, sock, address, addrlen);
1961 }
1962
1963 int security_socket_connect(struct socket *sock, struct sockaddr *address, int addrlen)
1964 {
1965         return call_int_hook(socket_connect, 0, sock, address, addrlen);
1966 }
1967
1968 int security_socket_listen(struct socket *sock, int backlog)
1969 {
1970         return call_int_hook(socket_listen, 0, sock, backlog);
1971 }
1972
1973 int security_socket_accept(struct socket *sock, struct socket *newsock)
1974 {
1975         return call_int_hook(socket_accept, 0, sock, newsock);
1976 }
1977
1978 int security_socket_sendmsg(struct socket *sock, struct msghdr *msg, int size)
1979 {
1980         return call_int_hook(socket_sendmsg, 0, sock, msg, size);
1981 }
1982
1983 int security_socket_recvmsg(struct socket *sock, struct msghdr *msg,
1984                             int size, int flags)
1985 {
1986         return call_int_hook(socket_recvmsg, 0, sock, msg, size, flags);
1987 }
1988
1989 int security_socket_getsockname(struct socket *sock)
1990 {
1991         return call_int_hook(socket_getsockname, 0, sock);
1992 }
1993
1994 int security_socket_getpeername(struct socket *sock)
1995 {
1996         return call_int_hook(socket_getpeername, 0, sock);
1997 }
1998
1999 int security_socket_getsockopt(struct socket *sock, int level, int optname)
2000 {
2001         return call_int_hook(socket_getsockopt, 0, sock, level, optname);
2002 }
2003
2004 int security_socket_setsockopt(struct socket *sock, int level, int optname)
2005 {
2006         return call_int_hook(socket_setsockopt, 0, sock, level, optname);
2007 }
2008
2009 int security_socket_shutdown(struct socket *sock, int how)
2010 {
2011         return call_int_hook(socket_shutdown, 0, sock, how);
2012 }
2013
2014 int security_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
2015 {
2016         return call_int_hook(socket_sock_rcv_skb, 0, sk, skb);
2017 }
2018 EXPORT_SYMBOL(security_sock_rcv_skb);
2019
2020 int security_socket_getpeersec_stream(struct socket *sock, char __user *optval,
2021                                       int __user *optlen, unsigned len)
2022 {
2023         return call_int_hook(socket_getpeersec_stream, -ENOPROTOOPT, sock,
2024                                 optval, optlen, len);
2025 }
2026
2027 int security_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb, u32 *secid)
2028 {
2029         return call_int_hook(socket_getpeersec_dgram, -ENOPROTOOPT, sock,
2030                              skb, secid);
2031 }
2032 EXPORT_SYMBOL(security_socket_getpeersec_dgram);
2033
2034 int security_sk_alloc(struct sock *sk, int family, gfp_t priority)
2035 {
2036         return call_int_hook(sk_alloc_security, 0, sk, family, priority);
2037 }
2038
2039 void security_sk_free(struct sock *sk)
2040 {
2041         call_void_hook(sk_free_security, sk);
2042 }
2043
2044 void security_sk_clone(const struct sock *sk, struct sock *newsk)
2045 {
2046         call_void_hook(sk_clone_security, sk, newsk);
2047 }
2048 EXPORT_SYMBOL(security_sk_clone);
2049
2050 void security_sk_classify_flow(struct sock *sk, struct flowi *fl)
2051 {
2052         call_void_hook(sk_getsecid, sk, &fl->flowi_secid);
2053 }
2054 EXPORT_SYMBOL(security_sk_classify_flow);
2055
2056 void security_req_classify_flow(const struct request_sock *req, struct flowi *fl)
2057 {
2058         call_void_hook(req_classify_flow, req, fl);
2059 }
2060 EXPORT_SYMBOL(security_req_classify_flow);
2061
2062 void security_sock_graft(struct sock *sk, struct socket *parent)
2063 {
2064         call_void_hook(sock_graft, sk, parent);
2065 }
2066 EXPORT_SYMBOL(security_sock_graft);
2067
2068 int security_inet_conn_request(struct sock *sk,
2069                         struct sk_buff *skb, struct request_sock *req)
2070 {
2071         return call_int_hook(inet_conn_request, 0, sk, skb, req);
2072 }
2073 EXPORT_SYMBOL(security_inet_conn_request);
2074
2075 void security_inet_csk_clone(struct sock *newsk,
2076                         const struct request_sock *req)
2077 {
2078         call_void_hook(inet_csk_clone, newsk, req);
2079 }
2080
2081 void security_inet_conn_established(struct sock *sk,
2082                         struct sk_buff *skb)
2083 {
2084         call_void_hook(inet_conn_established, sk, skb);
2085 }
2086 EXPORT_SYMBOL(security_inet_conn_established);
2087
2088 int security_secmark_relabel_packet(u32 secid)
2089 {
2090         return call_int_hook(secmark_relabel_packet, 0, secid);
2091 }
2092 EXPORT_SYMBOL(security_secmark_relabel_packet);
2093
2094 void security_secmark_refcount_inc(void)
2095 {
2096         call_void_hook(secmark_refcount_inc);
2097 }
2098 EXPORT_SYMBOL(security_secmark_refcount_inc);
2099
2100 void security_secmark_refcount_dec(void)
2101 {
2102         call_void_hook(secmark_refcount_dec);
2103 }
2104 EXPORT_SYMBOL(security_secmark_refcount_dec);
2105
2106 int security_tun_dev_alloc_security(void **security)
2107 {
2108         return call_int_hook(tun_dev_alloc_security, 0, security);
2109 }
2110 EXPORT_SYMBOL(security_tun_dev_alloc_security);
2111
2112 void security_tun_dev_free_security(void *security)
2113 {
2114         call_void_hook(tun_dev_free_security, security);
2115 }
2116 EXPORT_SYMBOL(security_tun_dev_free_security);
2117
2118 int security_tun_dev_create(void)
2119 {
2120         return call_int_hook(tun_dev_create, 0);
2121 }
2122 EXPORT_SYMBOL(security_tun_dev_create);
2123
2124 int security_tun_dev_attach_queue(void *security)
2125 {
2126         return call_int_hook(tun_dev_attach_queue, 0, security);
2127 }
2128 EXPORT_SYMBOL(security_tun_dev_attach_queue);
2129
2130 int security_tun_dev_attach(struct sock *sk, void *security)
2131 {
2132         return call_int_hook(tun_dev_attach, 0, sk, security);
2133 }
2134 EXPORT_SYMBOL(security_tun_dev_attach);
2135
2136 int security_tun_dev_open(void *security)
2137 {
2138         return call_int_hook(tun_dev_open, 0, security);
2139 }
2140 EXPORT_SYMBOL(security_tun_dev_open);
2141
2142 int security_sctp_assoc_request(struct sctp_endpoint *ep, struct sk_buff *skb)
2143 {
2144         return call_int_hook(sctp_assoc_request, 0, ep, skb);
2145 }
2146 EXPORT_SYMBOL(security_sctp_assoc_request);
2147
2148 int security_sctp_bind_connect(struct sock *sk, int optname,
2149                                struct sockaddr *address, int addrlen)
2150 {
2151         return call_int_hook(sctp_bind_connect, 0, sk, optname,
2152                              address, addrlen);
2153 }
2154 EXPORT_SYMBOL(security_sctp_bind_connect);
2155
2156 void security_sctp_sk_clone(struct sctp_endpoint *ep, struct sock *sk,
2157                             struct sock *newsk)
2158 {
2159         call_void_hook(sctp_sk_clone, ep, sk, newsk);
2160 }
2161 EXPORT_SYMBOL(security_sctp_sk_clone);
2162
2163 #endif  /* CONFIG_SECURITY_NETWORK */
2164
2165 #ifdef CONFIG_SECURITY_INFINIBAND
2166
2167 int security_ib_pkey_access(void *sec, u64 subnet_prefix, u16 pkey)
2168 {
2169         return call_int_hook(ib_pkey_access, 0, sec, subnet_prefix, pkey);
2170 }
2171 EXPORT_SYMBOL(security_ib_pkey_access);
2172
2173 int security_ib_endport_manage_subnet(void *sec, const char *dev_name, u8 port_num)
2174 {
2175         return call_int_hook(ib_endport_manage_subnet, 0, sec, dev_name, port_num);
2176 }
2177 EXPORT_SYMBOL(security_ib_endport_manage_subnet);
2178
2179 int security_ib_alloc_security(void **sec)
2180 {
2181         return call_int_hook(ib_alloc_security, 0, sec);
2182 }
2183 EXPORT_SYMBOL(security_ib_alloc_security);
2184
2185 void security_ib_free_security(void *sec)
2186 {
2187         call_void_hook(ib_free_security, sec);
2188 }
2189 EXPORT_SYMBOL(security_ib_free_security);
2190 #endif  /* CONFIG_SECURITY_INFINIBAND */
2191
2192 #ifdef CONFIG_SECURITY_NETWORK_XFRM
2193
2194 int security_xfrm_policy_alloc(struct xfrm_sec_ctx **ctxp,
2195                                struct xfrm_user_sec_ctx *sec_ctx,
2196                                gfp_t gfp)
2197 {
2198         return call_int_hook(xfrm_policy_alloc_security, 0, ctxp, sec_ctx, gfp);
2199 }
2200 EXPORT_SYMBOL(security_xfrm_policy_alloc);
2201
2202 int security_xfrm_policy_clone(struct xfrm_sec_ctx *old_ctx,
2203                               struct xfrm_sec_ctx **new_ctxp)
2204 {
2205         return call_int_hook(xfrm_policy_clone_security, 0, old_ctx, new_ctxp);
2206 }
2207
2208 void security_xfrm_policy_free(struct xfrm_sec_ctx *ctx)
2209 {
2210         call_void_hook(xfrm_policy_free_security, ctx);
2211 }
2212 EXPORT_SYMBOL(security_xfrm_policy_free);
2213
2214 int security_xfrm_policy_delete(struct xfrm_sec_ctx *ctx)
2215 {
2216         return call_int_hook(xfrm_policy_delete_security, 0, ctx);
2217 }
2218
2219 int security_xfrm_state_alloc(struct xfrm_state *x,
2220                               struct xfrm_user_sec_ctx *sec_ctx)
2221 {
2222         return call_int_hook(xfrm_state_alloc, 0, x, sec_ctx);
2223 }
2224 EXPORT_SYMBOL(security_xfrm_state_alloc);
2225
2226 int security_xfrm_state_alloc_acquire(struct xfrm_state *x,
2227                                       struct xfrm_sec_ctx *polsec, u32 secid)
2228 {
2229         return call_int_hook(xfrm_state_alloc_acquire, 0, x, polsec, secid);
2230 }
2231
2232 int security_xfrm_state_delete(struct xfrm_state *x)
2233 {
2234         return call_int_hook(xfrm_state_delete_security, 0, x);
2235 }
2236 EXPORT_SYMBOL(security_xfrm_state_delete);
2237
2238 void security_xfrm_state_free(struct xfrm_state *x)
2239 {
2240         call_void_hook(xfrm_state_free_security, x);
2241 }
2242
2243 int security_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir)
2244 {
2245         return call_int_hook(xfrm_policy_lookup, 0, ctx, fl_secid, dir);
2246 }
2247
2248 int security_xfrm_state_pol_flow_match(struct xfrm_state *x,
2249                                        struct xfrm_policy *xp,
2250                                        const struct flowi *fl)
2251 {
2252         struct security_hook_list *hp;
2253         int rc = 1;
2254
2255         /*
2256          * Since this function is expected to return 0 or 1, the judgment
2257          * becomes difficult if multiple LSMs supply this call. Fortunately,
2258          * we can use the first LSM's judgment because currently only SELinux
2259          * supplies this call.
2260          *
2261          * For speed optimization, we explicitly break the loop rather than
2262          * using the macro
2263          */
2264         hlist_for_each_entry(hp, &security_hook_heads.xfrm_state_pol_flow_match,
2265                                 list) {
2266                 rc = hp->hook.xfrm_state_pol_flow_match(x, xp, fl);
2267                 break;
2268         }
2269         return rc;
2270 }
2271
2272 int security_xfrm_decode_session(struct sk_buff *skb, u32 *secid)
2273 {
2274         return call_int_hook(xfrm_decode_session, 0, skb, secid, 1);
2275 }
2276
2277 void security_skb_classify_flow(struct sk_buff *skb, struct flowi *fl)
2278 {
2279         int rc = call_int_hook(xfrm_decode_session, 0, skb, &fl->flowi_secid,
2280                                 0);
2281
2282         BUG_ON(rc);
2283 }
2284 EXPORT_SYMBOL(security_skb_classify_flow);
2285
2286 #endif  /* CONFIG_SECURITY_NETWORK_XFRM */
2287
2288 #ifdef CONFIG_KEYS
2289
2290 int security_key_alloc(struct key *key, const struct cred *cred,
2291                        unsigned long flags)
2292 {
2293         return call_int_hook(key_alloc, 0, key, cred, flags);
2294 }
2295
2296 void security_key_free(struct key *key)
2297 {
2298         call_void_hook(key_free, key);
2299 }
2300
2301 int security_key_permission(key_ref_t key_ref,
2302                             const struct cred *cred, unsigned perm)
2303 {
2304         return call_int_hook(key_permission, 0, key_ref, cred, perm);
2305 }
2306
2307 int security_key_getsecurity(struct key *key, char **_buffer)
2308 {
2309         *_buffer = NULL;
2310         return call_int_hook(key_getsecurity, 0, key, _buffer);
2311 }
2312
2313 #endif  /* CONFIG_KEYS */
2314
2315 #ifdef CONFIG_AUDIT
2316
2317 int security_audit_rule_init(u32 field, u32 op, char *rulestr, void **lsmrule)
2318 {
2319         return call_int_hook(audit_rule_init, 0, field, op, rulestr, lsmrule);
2320 }
2321
2322 int security_audit_rule_known(struct audit_krule *krule)
2323 {
2324         return call_int_hook(audit_rule_known, 0, krule);
2325 }
2326
2327 void security_audit_rule_free(void *lsmrule)
2328 {
2329         call_void_hook(audit_rule_free, lsmrule);
2330 }
2331
2332 int security_audit_rule_match(u32 secid, u32 field, u32 op, void *lsmrule)
2333 {
2334         return call_int_hook(audit_rule_match, 0, secid, field, op, lsmrule);
2335 }
2336 #endif /* CONFIG_AUDIT */
2337
2338 #ifdef CONFIG_BPF_SYSCALL
2339 int security_bpf(int cmd, union bpf_attr *attr, unsigned int size)
2340 {
2341         return call_int_hook(bpf, 0, cmd, attr, size);
2342 }
2343 int security_bpf_map(struct bpf_map *map, fmode_t fmode)
2344 {
2345         return call_int_hook(bpf_map, 0, map, fmode);
2346 }
2347 int security_bpf_prog(struct bpf_prog *prog)
2348 {
2349         return call_int_hook(bpf_prog, 0, prog);
2350 }
2351 int security_bpf_map_alloc(struct bpf_map *map)
2352 {
2353         return call_int_hook(bpf_map_alloc_security, 0, map);
2354 }
2355 int security_bpf_prog_alloc(struct bpf_prog_aux *aux)
2356 {
2357         return call_int_hook(bpf_prog_alloc_security, 0, aux);
2358 }
2359 void security_bpf_map_free(struct bpf_map *map)
2360 {
2361         call_void_hook(bpf_map_free_security, map);
2362 }
2363 void security_bpf_prog_free(struct bpf_prog_aux *aux)
2364 {
2365         call_void_hook(bpf_prog_free_security, aux);
2366 }
2367 #endif /* CONFIG_BPF_SYSCALL */