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 #define EARLY_LSM_COUNT (__end_early_lsm_info - __start_early_lsm_info)
  37
  38 /*
  39  * These are descriptions of the reasons that can be passed to the
  40  * security_locked_down() LSM hook. Placing this array here allows
  41  * all security modules to use the same descriptions for auditing
  42  * purposes.
  43  */
  44 const char *const lockdown_reasons[LOCKDOWN_CONFIDENTIALITY_MAX+1] = {
  45         [LOCKDOWN_NONE] = "none",
  46         [LOCKDOWN_MODULE_SIGNATURE] = "unsigned module loading",
  47         [LOCKDOWN_DEV_MEM] = "/dev/mem,kmem,port",
  48         [LOCKDOWN_EFI_TEST] = "/dev/efi_test access",
  49         [LOCKDOWN_KEXEC] = "kexec of unsigned images",
  50         [LOCKDOWN_HIBERNATION] = "hibernation",
  51         [LOCKDOWN_PCI_ACCESS] = "direct PCI access",
  52         [LOCKDOWN_IOPORT] = "raw io port access",
  53         [LOCKDOWN_MSR] = "raw MSR access",
  54         [LOCKDOWN_ACPI_TABLES] = "modifying ACPI tables",
  55         [LOCKDOWN_PCMCIA_CIS] = "direct PCMCIA CIS storage",
  56         [LOCKDOWN_TIOCSSERIAL] = "reconfiguration of serial port IO",
  57         [LOCKDOWN_MODULE_PARAMETERS] = "unsafe module parameters",
  58         [LOCKDOWN_MMIOTRACE] = "unsafe mmio",
  59         [LOCKDOWN_DEBUGFS] = "debugfs access",
  60         [LOCKDOWN_XMON_WR] = "xmon write access",
  61         [LOCKDOWN_INTEGRITY_MAX] = "integrity",
  62         [LOCKDOWN_KCORE] = "/proc/kcore access",
  63         [LOCKDOWN_KPROBES] = "use of kprobes",
  64         [LOCKDOWN_BPF_READ] = "use of bpf to read kernel RAM",
  65         [LOCKDOWN_PERF] = "unsafe use of perf",
  66         [LOCKDOWN_TRACEFS] = "use of tracefs",
  67         [LOCKDOWN_XMON_RW] = "xmon read and write access",
  68         [LOCKDOWN_CONFIDENTIALITY_MAX] = "confidentiality",
  69 };
  70
  71 struct security_hook_heads security_hook_heads __lsm_ro_after_init;
  72 static BLOCKING_NOTIFIER_HEAD(blocking_lsm_notifier_chain);
  73
  74 static struct kmem_cache *lsm_file_cache;
  75 static struct kmem_cache *lsm_inode_cache;
  76
  77 char *lsm_names;
  78 static struct lsm_blob_sizes blob_sizes __lsm_ro_after_init;
  79
  80 /* Boot-time LSM user choice */
  81 static __initdata const char *chosen_lsm_order;
  82 static __initdata const char *chosen_major_lsm;
  83
  84 static __initconst const char * const builtin_lsm_order = CONFIG_LSM;
  85
  86 /* Ordered list of LSMs to initialize. */
  87 static __initdata struct lsm_info **ordered_lsms;
  88 static __initdata struct lsm_info *exclusive;
  89
  90 static __initdata bool debug;
  91 #define init_debug(...)                                         \
  92         do {                                                    \
  93                 if (debug)                                      \
  94                         pr_info(__VA_ARGS__);                   \
  95         } while (0)
  96
  97 static bool __init is_enabled(struct lsm_info *lsm)
  98 {
  99         if (!lsm->enabled)
 100                 return false;
 101
 102         return *lsm->enabled;
 103 }
 104
 105 /* Mark an LSM's enabled flag. */
 106 static int lsm_enabled_true __initdata = 1;
 107 static int lsm_enabled_false __initdata = 0;
 108 static void __init set_enabled(struct lsm_info *lsm, bool enabled)
 109 {
 110         /*
 111          * When an LSM hasn't configured an enable variable, we can use
 112          * a hard-coded location for storing the default enabled state.
 113          */
 114         if (!lsm->enabled) {
 115                 if (enabled)
 116                         lsm->enabled = &lsm_enabled_true;
 117                 else
 118                         lsm->enabled = &lsm_enabled_false;
 119         } else if (lsm->enabled == &lsm_enabled_true) {
 120                 if (!enabled)
 121                         lsm->enabled = &lsm_enabled_false;
 122         } else if (lsm->enabled == &lsm_enabled_false) {
 123                 if (enabled)
 124                         lsm->enabled = &lsm_enabled_true;
 125         } else {
 126                 *lsm->enabled = enabled;
 127         }
 128 }
 129
 130 /* Is an LSM already listed in the ordered LSMs list? */
 131 static bool __init exists_ordered_lsm(struct lsm_info *lsm)
 132 {
 133         struct lsm_info **check;
 134
 135         for (check = ordered_lsms; *check; check++)
 136                 if (*check == lsm)
 137                         return true;
 138
 139         return false;
 140 }
 141
 142 /* Append an LSM to the list of ordered LSMs to initialize. */
 143 static int last_lsm __initdata;
 144 static void __init append_ordered_lsm(struct lsm_info *lsm, const char *from)
 145 {
 146         /* Ignore duplicate selections. */
 147         if (exists_ordered_lsm(lsm))
 148                 return;
 149
 150         if (WARN(last_lsm == LSM_COUNT, "%s: out of LSM slots!?\n", from))
 151                 return;
 152
 153         /* Enable this LSM, if it is not already set. */
 154         if (!lsm->enabled)
 155                 lsm->enabled = &lsm_enabled_true;
 156         ordered_lsms[last_lsm++] = lsm;
 157
 158         init_debug("%s ordering: %s (%sabled)\n", from, lsm->name,
 159                    is_enabled(lsm) ? "en" : "dis");
 160 }
 161
 162 /* Is an LSM allowed to be initialized? */
 163 static bool __init lsm_allowed(struct lsm_info *lsm)
 164 {
 165         /* Skip if the LSM is disabled. */
 166         if (!is_enabled(lsm))
 167                 return false;
 168
 169         /* Not allowed if another exclusive LSM already initialized. */
 170         if ((lsm->flags & LSM_FLAG_EXCLUSIVE) && exclusive) {
 171                 init_debug("exclusive disabled: %s\n", lsm->name);
 172                 return false;
 173         }
 174
 175         return true;
 176 }
 177
 178 static void __init lsm_set_blob_size(int *need, int *lbs)
 179 {
 180         int offset;
 181
 182         if (*need > 0) {
 183                 offset = *lbs;
 184                 *lbs += *need;
 185                 *need = offset;
 186         }
 187 }
 188
 189 static void __init lsm_set_blob_sizes(struct lsm_blob_sizes *needed)
 190 {
 191         if (!needed)
 192                 return;
 193
 194         lsm_set_blob_size(&needed->lbs_cred, &blob_sizes.lbs_cred);
 195         lsm_set_blob_size(&needed->lbs_file, &blob_sizes.lbs_file);
 196         /*
 197          * The inode blob gets an rcu_head in addition to
 198          * what the modules might need.
 199          */
 200         if (needed->lbs_inode && blob_sizes.lbs_inode == 0)
 201                 blob_sizes.lbs_inode = sizeof(struct rcu_head);
 202         lsm_set_blob_size(&needed->lbs_inode, &blob_sizes.lbs_inode);
 203         lsm_set_blob_size(&needed->lbs_ipc, &blob_sizes.lbs_ipc);
 204         lsm_set_blob_size(&needed->lbs_msg_msg, &blob_sizes.lbs_msg_msg);
 205         lsm_set_blob_size(&needed->lbs_task, &blob_sizes.lbs_task);
 206 }
 207
 208 /* Prepare LSM for initialization. */
 209 static void __init prepare_lsm(struct lsm_info *lsm)
 210 {
 211         int enabled = lsm_allowed(lsm);
 212
 213         /* Record enablement (to handle any following exclusive LSMs). */
 214         set_enabled(lsm, enabled);
 215
 216         /* If enabled, do pre-initialization work. */
 217         if (enabled) {
 218                 if ((lsm->flags & LSM_FLAG_EXCLUSIVE) && !exclusive) {
 219                         exclusive = lsm;
 220                         init_debug("exclusive chosen: %s\n", lsm->name);
 221                 }
 222
 223                 lsm_set_blob_sizes(lsm->blobs);
 224         }
 225 }
 226
 227 /* Initialize a given LSM, if it is enabled. */
 228 static void __init initialize_lsm(struct lsm_info *lsm)
 229 {
 230         if (is_enabled(lsm)) {
 231                 int ret;
 232
 233                 init_debug("initializing %s\n", lsm->name);
 234                 ret = lsm->init();
 235                 WARN(ret, "%s failed to initialize: %d\n", lsm->name, ret);
 236         }
 237 }
 238
 239 /* Populate ordered LSMs list from comma-separated LSM name list. */
 240 static void __init ordered_lsm_parse(const char *order, const char *origin)
 241 {
 242         struct lsm_info *lsm;
 243         char *sep, *name, *next;
 244
 245         /* LSM_ORDER_FIRST is always first. */
 246         for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) {
 247                 if (lsm->order == LSM_ORDER_FIRST)
 248                         append_ordered_lsm(lsm, "first");
 249         }
 250
 251         /* Process "security=", if given. */
 252         if (chosen_major_lsm) {
 253                 struct lsm_info *major;
 254
 255                 /*
 256                  * To match the original "security=" behavior, this
 257                  * explicitly does NOT fallback to another Legacy Major
 258                  * if the selected one was separately disabled: disable
 259                  * all non-matching Legacy Major LSMs.
 260                  */
 261                 for (major = __start_lsm_info; major < __end_lsm_info;
 262                      major++) {
 263                         if ((major->flags & LSM_FLAG_LEGACY_MAJOR) &&
 264                             strcmp(major->name, chosen_major_lsm) != 0) {
 265                                 set_enabled(major, false);
 266                                 init_debug("security=%s disabled: %s\n",
 267                                            chosen_major_lsm, major->name);
 268                         }
 269                 }
 270         }
 271
 272         sep = kstrdup(order, GFP_KERNEL);
 273         next = sep;
 274         /* Walk the list, looking for matching LSMs. */
 275         while ((name = strsep(&next, ",")) != NULL) {
 276                 bool found = false;
 277
 278                 for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) {
 279                         if (lsm->order == LSM_ORDER_MUTABLE &&
 280                             strcmp(lsm->name, name) == 0) {
 281                                 append_ordered_lsm(lsm, origin);
 282                                 found = true;
 283                         }
 284                 }
 285
 286                 if (!found)
 287                         init_debug("%s ignored: %s\n", origin, name);
 288         }
 289
 290         /* Process "security=", if given. */
 291         if (chosen_major_lsm) {
 292                 for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) {
 293                         if (exists_ordered_lsm(lsm))
 294                                 continue;
 295                         if (strcmp(lsm->name, chosen_major_lsm) == 0)
 296                                 append_ordered_lsm(lsm, "security=");
 297                 }
 298         }
 299
 300         /* Disable all LSMs not in the ordered list. */
 301         for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) {
 302                 if (exists_ordered_lsm(lsm))
 303                         continue;
 304                 set_enabled(lsm, false);
 305                 init_debug("%s disabled: %s\n", origin, lsm->name);
 306         }
 307
 308         kfree(sep);
 309 }
 310
 311 static void __init lsm_early_cred(struct cred *cred);
 312 static void __init lsm_early_task(struct task_struct *task);
 313
 314 static int lsm_append(const char *new, char **result);
 315
 316 static void __init ordered_lsm_init(void)
 317 {
 318         struct lsm_info **lsm;
 319
 320         ordered_lsms = kcalloc(LSM_COUNT + 1, sizeof(*ordered_lsms),
 321                                 GFP_KERNEL);
 322
 323         if (chosen_lsm_order) {
 324                 if (chosen_major_lsm) {
 325                         pr_info("security= is ignored because it is superseded by lsm=\n");
 326                         chosen_major_lsm = NULL;
 327                 }
 328                 ordered_lsm_parse(chosen_lsm_order, "cmdline");
 329         } else
 330                 ordered_lsm_parse(builtin_lsm_order, "builtin");
 331
 332         for (lsm = ordered_lsms; *lsm; lsm++)
 333                 prepare_lsm(*lsm);
 334
 335         init_debug("cred blob size     = %d\n", blob_sizes.lbs_cred);
 336         init_debug("file blob size     = %d\n", blob_sizes.lbs_file);
 337         init_debug("inode blob size    = %d\n", blob_sizes.lbs_inode);
 338         init_debug("ipc blob size      = %d\n", blob_sizes.lbs_ipc);
 339         init_debug("msg_msg blob size  = %d\n", blob_sizes.lbs_msg_msg);
 340         init_debug("task blob size     = %d\n", blob_sizes.lbs_task);
 341
 342         /*
 343          * Create any kmem_caches needed for blobs
 344          */
 345         if (blob_sizes.lbs_file)
 346                 lsm_file_cache = kmem_cache_create("lsm_file_cache",
 347                                                    blob_sizes.lbs_file, 0,
 348                                                    SLAB_PANIC, NULL);
 349         if (blob_sizes.lbs_inode)
 350                 lsm_inode_cache = kmem_cache_create("lsm_inode_cache",
 351                                                     blob_sizes.lbs_inode, 0,
 352                                                     SLAB_PANIC, NULL);
 353
 354         lsm_early_cred((struct cred *) current->cred);
 355         lsm_early_task(current);
 356         for (lsm = ordered_lsms; *lsm; lsm++)
 357                 initialize_lsm(*lsm);
 358
 359         kfree(ordered_lsms);
 360 }
 361
 362 int __init early_security_init(void)
 363 {
 364         int i;
 365         struct hlist_head *list = (struct hlist_head *) &security_hook_heads;
 366         struct lsm_info *lsm;
 367
 368         for (i = 0; i < sizeof(security_hook_heads) / sizeof(struct hlist_head);
 369              i++)
 370                 INIT_HLIST_HEAD(&list[i]);
 371
 372         for (lsm = __start_early_lsm_info; lsm < __end_early_lsm_info; lsm++) {
 373                 if (!lsm->enabled)
 374                         lsm->enabled = &lsm_enabled_true;
 375                 prepare_lsm(lsm);
 376                 initialize_lsm(lsm);
 377         }
 378
 379         return 0;
 380 }
 381
 382 /**
 383  * security_init - initializes the security framework
 384  *
 385  * This should be called early in the kernel initialization sequence.
 386  */
 387 int __init security_init(void)
 388 {
 389         struct lsm_info *lsm;
 390
 391         pr_info("Security Framework initializing\n");
 392
 393         /*
 394          * Append the names of the early LSM modules now that kmalloc() is
 395          * available
 396          */
 397         for (lsm = __start_early_lsm_info; lsm < __end_early_lsm_info; lsm++) {
 398                 if (lsm->enabled)
 399                         lsm_append(lsm->name, &lsm_names);
 400         }
 401
 402         /* Load LSMs in specified order. */
 403         ordered_lsm_init();
 404
 405         return 0;
 406 }
 407
 408 /* Save user chosen LSM */
 409 static int __init choose_major_lsm(char *str)
 410 {
 411         chosen_major_lsm = str;
 412         return 1;
 413 }
 414 __setup("security=", choose_major_lsm);
 415
 416 /* Explicitly choose LSM initialization order. */
 417 static int __init choose_lsm_order(char *str)
 418 {
 419         chosen_lsm_order = str;
 420         return 1;
 421 }
 422 __setup("lsm=", choose_lsm_order);
 423
 424 /* Enable LSM order debugging. */
 425 static int __init enable_debug(char *str)
 426 {
 427         debug = true;
 428         return 1;
 429 }
 430 __setup("lsm.debug", enable_debug);
 431
 432 static bool match_last_lsm(const char *list, const char *lsm)
 433 {
 434         const char *last;
 435
 436         if (WARN_ON(!list || !lsm))
 437                 return false;
 438         last = strrchr(list, ',');
 439         if (last)
 440                 /* Pass the comma, strcmp() will check for '\0' */
 441                 last++;
 442         else
 443                 last = list;
 444         return !strcmp(last, lsm);
 445 }
 446
 447 static int lsm_append(const char *new, char **result)
 448 {
 449         char *cp;
 450
 451         if (*result == NULL) {
 452                 *result = kstrdup(new, GFP_KERNEL);
 453                 if (*result == NULL)
 454                         return -ENOMEM;
 455         } else {
 456                 /* Check if it is the last registered name */
 457                 if (match_last_lsm(*result, new))
 458                         return 0;
 459                 cp = kasprintf(GFP_KERNEL, "%s,%s", *result, new);
 460                 if (cp == NULL)
 461                         return -ENOMEM;
 462                 kfree(*result);
 463                 *result = cp;
 464         }
 465         return 0;
 466 }
 467
 468 /**
 469  * security_add_hooks - Add a modules hooks to the hook lists.
 470  * @hooks: the hooks to add
 471  * @count: the number of hooks to add
 472  * @lsm: the name of the security module
 473  *
 474  * Each LSM has to register its hooks with the infrastructure.
 475  */
 476 void __init security_add_hooks(struct security_hook_list *hooks, int count,
 477                                 char *lsm)
 478 {
 479         int i;
 480
 481         for (i = 0; i < count; i++) {
 482                 hooks[i].lsm = lsm;
 483                 hlist_add_tail_rcu(&hooks[i].list, hooks[i].head);
 484         }
 485
 486         /*
 487          * Don't try to append during early_security_init(), we'll come back
 488          * and fix this up afterwards.
 489          */
 490         if (slab_is_available()) {
 491                 if (lsm_append(lsm, &lsm_names) < 0)
 492                         panic("%s - Cannot get early memory.\n", __func__);
 493         }
 494 }
 495
 496 int call_blocking_lsm_notifier(enum lsm_event event, void *data)
 497 {
 498         return blocking_notifier_call_chain(&blocking_lsm_notifier_chain,
 499                                             event, data);
 500 }
 501 EXPORT_SYMBOL(call_blocking_lsm_notifier);
 502
 503 int register_blocking_lsm_notifier(struct notifier_block *nb)
 504 {
 505         return blocking_notifier_chain_register(&blocking_lsm_notifier_chain,
 506                                                 nb);
 507 }
 508 EXPORT_SYMBOL(register_blocking_lsm_notifier);
 509
 510 int unregister_blocking_lsm_notifier(struct notifier_block *nb)
 511 {
 512         return blocking_notifier_chain_unregister(&blocking_lsm_notifier_chain,
 513                                                   nb);
 514 }
 515 EXPORT_SYMBOL(unregister_blocking_lsm_notifier);
 516
 517 /**
 518  * lsm_cred_alloc - allocate a composite cred blob
 519  * @cred: the cred that needs a blob
 520  * @gfp: allocation type
 521  *
 522  * Allocate the cred blob for all the modules
 523  *
 524  * Returns 0, or -ENOMEM if memory can't be allocated.
 525  */
 526 static int lsm_cred_alloc(struct cred *cred, gfp_t gfp)
 527 {
 528         if (blob_sizes.lbs_cred == 0) {
 529                 cred->security = NULL;
 530                 return 0;
 531         }
 532
 533         cred->security = kzalloc(blob_sizes.lbs_cred, gfp);
 534         if (cred->security == NULL)
 535                 return -ENOMEM;
 536         return 0;
 537 }
 538
 539 /**
 540  * lsm_early_cred - during initialization allocate a composite cred blob
 541  * @cred: the cred that needs a blob
 542  *
 543  * Allocate the cred blob for all the modules
 544  */
 545 static void __init lsm_early_cred(struct cred *cred)
 546 {
 547         int rc = lsm_cred_alloc(cred, GFP_KERNEL);
 548
 549         if (rc)
 550                 panic("%s: Early cred alloc failed.\n", __func__);
 551 }
 552
 553 /**
 554  * lsm_file_alloc - allocate a composite file blob
 555  * @file: the file that needs a blob
 556  *
 557  * Allocate the file blob for all the modules
 558  *
 559  * Returns 0, or -ENOMEM if memory can't be allocated.
 560  */
 561 static int lsm_file_alloc(struct file *file)
 562 {
 563         if (!lsm_file_cache) {
 564                 file->f_security = NULL;
 565                 return 0;
 566         }
 567
 568         file->f_security = kmem_cache_zalloc(lsm_file_cache, GFP_KERNEL);
 569         if (file->f_security == NULL)
 570                 return -ENOMEM;
 571         return 0;
 572 }
 573
 574 /**
 575  * lsm_inode_alloc - allocate a composite inode blob
 576  * @inode: the inode that needs a blob
 577  *
 578  * Allocate the inode blob for all the modules
 579  *
 580  * Returns 0, or -ENOMEM if memory can't be allocated.
 581  */
 582 int lsm_inode_alloc(struct inode *inode)
 583 {
 584         if (!lsm_inode_cache) {
 585                 inode->i_security = NULL;
 586                 return 0;
 587         }
 588
 589         inode->i_security = kmem_cache_zalloc(lsm_inode_cache, GFP_NOFS);
 590         if (inode->i_security == NULL)
 591                 return -ENOMEM;
 592         return 0;
 593 }
 594
 595 /**
 596  * lsm_task_alloc - allocate a composite task blob
 597  * @task: the task that needs a blob
 598  *
 599  * Allocate the task blob for all the modules
 600  *
 601  * Returns 0, or -ENOMEM if memory can't be allocated.
 602  */
 603 static int lsm_task_alloc(struct task_struct *task)
 604 {
 605         if (blob_sizes.lbs_task == 0) {
 606                 task->security = NULL;
 607                 return 0;
 608         }
 609
 610         task->security = kzalloc(blob_sizes.lbs_task, GFP_KERNEL);
 611         if (task->security == NULL)
 612                 return -ENOMEM;
 613         return 0;
 614 }
 615
 616 /**
 617  * lsm_ipc_alloc - allocate a composite ipc blob
 618  * @kip: the ipc that needs a blob
 619  *
 620  * Allocate the ipc blob for all the modules
 621  *
 622  * Returns 0, or -ENOMEM if memory can't be allocated.
 623  */
 624 static int lsm_ipc_alloc(struct kern_ipc_perm *kip)
 625 {
 626         if (blob_sizes.lbs_ipc == 0) {
 627                 kip->security = NULL;
 628                 return 0;
 629         }
 630
 631         kip->security = kzalloc(blob_sizes.lbs_ipc, GFP_KERNEL);
 632         if (kip->security == NULL)
 633                 return -ENOMEM;
 634         return 0;
 635 }
 636
 637 /**
 638  * lsm_msg_msg_alloc - allocate a composite msg_msg blob
 639  * @mp: the msg_msg that needs a blob
 640  *
 641  * Allocate the ipc blob for all the modules
 642  *
 643  * Returns 0, or -ENOMEM if memory can't be allocated.
 644  */
 645 static int lsm_msg_msg_alloc(struct msg_msg *mp)
 646 {
 647         if (blob_sizes.lbs_msg_msg == 0) {
 648                 mp->security = NULL;
 649                 return 0;
 650         }
 651
 652         mp->security = kzalloc(blob_sizes.lbs_msg_msg, GFP_KERNEL);
 653         if (mp->security == NULL)
 654                 return -ENOMEM;
 655         return 0;
 656 }
 657
 658 /**
 659  * lsm_early_task - during initialization allocate a composite task blob
 660  * @task: the task that needs a blob
 661  *
 662  * Allocate the task blob for all the modules
 663  */
 664 static void __init lsm_early_task(struct task_struct *task)
 665 {
 666         int rc = lsm_task_alloc(task);
 667
 668         if (rc)
 669                 panic("%s: Early task alloc failed.\n", __func__);
 670 }
 671
 672 /*
 673  * Hook list operation macros.
 674  *
 675  * call_void_hook:
 676  *      This is a hook that does not return a value.
 677  *
 678  * call_int_hook:
 679  *      This is a hook that returns a value.
 680  */
 681
 682 #define call_void_hook(FUNC, ...)                               \
 683         do {                                                    \
 684                 struct security_hook_list *P;                   \
 685                                                                 \
 686                 hlist_for_each_entry(P, &security_hook_heads.FUNC, list) \
 687                         P->hook.FUNC(__VA_ARGS__);              \
 688         } while (0)
 689
 690 #define call_int_hook(FUNC, IRC, ...) ({                        \
 691         int RC = IRC;                                           \
 692         do {                                                    \
 693                 struct security_hook_list *P;                   \
 694                                                                 \
 695                 hlist_for_each_entry(P, &security_hook_heads.FUNC, list) { \
 696                         RC = P->hook.FUNC(__VA_ARGS__);         \
 697                         if (RC != 0)                            \
 698                                 break;                          \
 699                 }                                               \
 700         } while (0);                                            \
 701         RC;                                                     \
 702 })
 703
 704 /* Security operations */
 705
 706 int security_binder_set_context_mgr(struct task_struct *mgr)
 707 {
 708         return call_int_hook(binder_set_context_mgr, 0, mgr);
 709 }
 710
 711 int security_binder_transaction(struct task_struct *from,
 712                                 struct task_struct *to)
 713 {
 714         return call_int_hook(binder_transaction, 0, from, to);
 715 }
 716
 717 int security_binder_transfer_binder(struct task_struct *from,
 718                                     struct task_struct *to)
 719 {
 720         return call_int_hook(binder_transfer_binder, 0, from, to);
 721 }
 722
 723 int security_binder_transfer_file(struct task_struct *from,
 724                                   struct task_struct *to, struct file *file)
 725 {
 726         return call_int_hook(binder_transfer_file, 0, from, to, file);
 727 }
 728
 729 int security_ptrace_access_check(struct task_struct *child, unsigned int mode)
 730 {
 731         return call_int_hook(ptrace_access_check, 0, child, mode);
 732 }
 733
 734 int security_ptrace_traceme(struct task_struct *parent)
 735 {
 736         return call_int_hook(ptrace_traceme, 0, parent);
 737 }
 738
 739 int security_capget(struct task_struct *target,
 740                      kernel_cap_t *effective,
 741                      kernel_cap_t *inheritable,
 742                      kernel_cap_t *permitted)
 743 {
 744         return call_int_hook(capget, 0, target,
 745                                 effective, inheritable, permitted);
 746 }
 747
 748 int security_capset(struct cred *new, const struct cred *old,
 749                     const kernel_cap_t *effective,
 750                     const kernel_cap_t *inheritable,
 751                     const kernel_cap_t *permitted)
 752 {
 753         return call_int_hook(capset, 0, new, old,
 754                                 effective, inheritable, permitted);
 755 }
 756
 757 int security_capable(const struct cred *cred,
 758                      struct user_namespace *ns,
 759                      int cap,
 760                      unsigned int opts)
 761 {
 762         return call_int_hook(capable, 0, cred, ns, cap, opts);
 763 }
 764
 765 int security_quotactl(int cmds, int type, int id, struct super_block *sb)
 766 {
 767         return call_int_hook(quotactl, 0, cmds, type, id, sb);
 768 }
 769
 770 int security_quota_on(struct dentry *dentry)
 771 {
 772         return call_int_hook(quota_on, 0, dentry);
 773 }
 774
 775 int security_syslog(int type)
 776 {
 777         return call_int_hook(syslog, 0, type);
 778 }
 779
 780 int security_settime64(const struct timespec64 *ts, const struct timezone *tz)
 781 {
 782         return call_int_hook(settime, 0, ts, tz);
 783 }
 784
 785 int security_vm_enough_memory_mm(struct mm_struct *mm, long pages)
 786 {
 787         struct security_hook_list *hp;
 788         int cap_sys_admin = 1;
 789         int rc;
 790
 791         /*
 792          * The module will respond with a positive value if
 793          * it thinks the __vm_enough_memory() call should be
 794          * made with the cap_sys_admin set. If all of the modules
 795          * agree that it should be set it will. If any module
 796          * thinks it should not be set it won't.
 797          */
 798         hlist_for_each_entry(hp, &security_hook_heads.vm_enough_memory, list) {
 799                 rc = hp->hook.vm_enough_memory(mm, pages);
 800                 if (rc <= 0) {
 801                         cap_sys_admin = 0;
 802                         break;
 803                 }
 804         }
 805         return __vm_enough_memory(mm, pages, cap_sys_admin);
 806 }
 807
 808 int security_bprm_set_creds(struct linux_binprm *bprm)
 809 {
 810         return call_int_hook(bprm_set_creds, 0, bprm);
 811 }
 812
 813 int security_bprm_check(struct linux_binprm *bprm)
 814 {
 815         int ret;
 816
 817         ret = call_int_hook(bprm_check_security, 0, bprm);
 818         if (ret)
 819                 return ret;
 820         return ima_bprm_check(bprm);
 821 }
 822
 823 void security_bprm_committing_creds(struct linux_binprm *bprm)
 824 {
 825         call_void_hook(bprm_committing_creds, bprm);
 826 }
 827
 828 void security_bprm_committed_creds(struct linux_binprm *bprm)
 829 {
 830         call_void_hook(bprm_committed_creds, bprm);
 831 }
 832
 833 int security_fs_context_dup(struct fs_context *fc, struct fs_context *src_fc)
 834 {
 835         return call_int_hook(fs_context_dup, 0, fc, src_fc);
 836 }
 837
 838 int security_fs_context_parse_param(struct fs_context *fc, struct fs_parameter *param)
 839 {
 840         return call_int_hook(fs_context_parse_param, -ENOPARAM, fc, param);
 841 }
 842
 843 int security_sb_alloc(struct super_block *sb)
 844 {
 845         return call_int_hook(sb_alloc_security, 0, sb);
 846 }
 847
 848 void security_sb_free(struct super_block *sb)
 849 {
 850         call_void_hook(sb_free_security, sb);
 851 }
 852
 853 void security_free_mnt_opts(void **mnt_opts)
 854 {
 855         if (!*mnt_opts)
 856                 return;
 857         call_void_hook(sb_free_mnt_opts, *mnt_opts);
 858         *mnt_opts = NULL;
 859 }
 860 EXPORT_SYMBOL(security_free_mnt_opts);
 861
 862 int security_sb_eat_lsm_opts(char *options, void **mnt_opts)
 863 {
 864         return call_int_hook(sb_eat_lsm_opts, 0, options, mnt_opts);
 865 }
 866 EXPORT_SYMBOL(security_sb_eat_lsm_opts);
 867
 868 int security_sb_remount(struct super_block *sb,
 869                         void *mnt_opts)
 870 {
 871         return call_int_hook(sb_remount, 0, sb, mnt_opts);
 872 }
 873 EXPORT_SYMBOL(security_sb_remount);
 874
 875 int security_sb_kern_mount(struct super_block *sb)
 876 {
 877         return call_int_hook(sb_kern_mount, 0, sb);
 878 }
 879
 880 int security_sb_show_options(struct seq_file *m, struct super_block *sb)
 881 {
 882         return call_int_hook(sb_show_options, 0, m, sb);
 883 }
 884
 885 int security_sb_statfs(struct dentry *dentry)
 886 {
 887         return call_int_hook(sb_statfs, 0, dentry);
 888 }
 889
 890 int security_sb_mount(const char *dev_name, const struct path *path,
 891                        const char *type, unsigned long flags, void *data)
 892 {
 893         return call_int_hook(sb_mount, 0, dev_name, path, type, flags, data);
 894 }
 895
 896 int security_sb_umount(struct vfsmount *mnt, int flags)
 897 {
 898         return call_int_hook(sb_umount, 0, mnt, flags);
 899 }
 900
 901 int security_sb_pivotroot(const struct path *old_path, const struct path *new_path)
 902 {
 903         return call_int_hook(sb_pivotroot, 0, old_path, new_path);
 904 }
 905
 906 int security_sb_set_mnt_opts(struct super_block *sb,
 907                                 void *mnt_opts,
 908                                 unsigned long kern_flags,
 909                                 unsigned long *set_kern_flags)
 910 {
 911         return call_int_hook(sb_set_mnt_opts,
 912                                 mnt_opts ? -EOPNOTSUPP : 0, sb,
 913                                 mnt_opts, kern_flags, set_kern_flags);
 914 }
 915 EXPORT_SYMBOL(security_sb_set_mnt_opts);
 916
 917 int security_sb_clone_mnt_opts(const struct super_block *oldsb,
 918                                 struct super_block *newsb,
 919                                 unsigned long kern_flags,
 920                                 unsigned long *set_kern_flags)
 921 {
 922         return call_int_hook(sb_clone_mnt_opts, 0, oldsb, newsb,
 923                                 kern_flags, set_kern_flags);
 924 }
 925 EXPORT_SYMBOL(security_sb_clone_mnt_opts);
 926
 927 int security_add_mnt_opt(const char *option, const char *val, int len,
 928                          void **mnt_opts)
 929 {
 930         return call_int_hook(sb_add_mnt_opt, -EINVAL,
 931                                         option, val, len, mnt_opts);
 932 }
 933 EXPORT_SYMBOL(security_add_mnt_opt);
 934
 935 int security_move_mount(const struct path *from_path, const struct path *to_path)
 936 {
 937         return call_int_hook(move_mount, 0, from_path, to_path);
 938 }
 939
 940 int security_path_notify(const struct path *path, u64 mask,
 941                                 unsigned int obj_type)
 942 {
 943         return call_int_hook(path_notify, 0, path, mask, obj_type);
 944 }
 945
 946 int security_inode_alloc(struct inode *inode)
 947 {
 948         int rc = lsm_inode_alloc(inode);
 949
 950         if (unlikely(rc))
 951                 return rc;
 952         rc = call_int_hook(inode_alloc_security, 0, inode);
 953         if (unlikely(rc))
 954                 security_inode_free(inode);
 955         return rc;
 956 }
 957
 958 static void inode_free_by_rcu(struct rcu_head *head)
 959 {
 960         /*
 961          * The rcu head is at the start of the inode blob
 962          */
 963         kmem_cache_free(lsm_inode_cache, head);
 964 }
 965
 966 void security_inode_free(struct inode *inode)
 967 {
 968         integrity_inode_free(inode);
 969         call_void_hook(inode_free_security, inode);
 970         /*
 971          * The inode may still be referenced in a path walk and
 972          * a call to security_inode_permission() can be made
 973          * after inode_free_security() is called. Ideally, the VFS
 974          * wouldn't do this, but fixing that is a much harder
 975          * job. For now, simply free the i_security via RCU, and
 976          * leave the current inode->i_security pointer intact.
 977          * The inode will be freed after the RCU grace period too.
 978          */
 979         if (inode->i_security)
 980                 call_rcu((struct rcu_head *)inode->i_security,
 981                                 inode_free_by_rcu);
 982 }
 983
 984 int security_dentry_init_security(struct dentry *dentry, int mode,
 985                                         const struct qstr *name, void **ctx,
 986                                         u32 *ctxlen)
 987 {
 988         return call_int_hook(dentry_init_security, -EOPNOTSUPP, dentry, mode,
 989                                 name, ctx, ctxlen);
 990 }
 991 EXPORT_SYMBOL(security_dentry_init_security);
 992
 993 int security_dentry_create_files_as(struct dentry *dentry, int mode,
 994                                     struct qstr *name,
 995                                     const struct cred *old, struct cred *new)
 996 {
 997         return call_int_hook(dentry_create_files_as, 0, dentry, mode,
 998                                 name, old, new);
 999 }
1000 EXPORT_SYMBOL(security_dentry_create_files_as);
1001
1002 int security_inode_init_security(struct inode *inode, struct inode *dir,
1003                                  const struct qstr *qstr,
1004                                  const initxattrs initxattrs, void *fs_data)
1005 {
1006         struct xattr new_xattrs[MAX_LSM_EVM_XATTR + 1];
1007         struct xattr *lsm_xattr, *evm_xattr, *xattr;
1008         int ret;
1009
1010         if (unlikely(IS_PRIVATE(inode)))
1011                 return 0;
1012
1013         if (!initxattrs)
1014                 return call_int_hook(inode_init_security, -EOPNOTSUPP, inode,
1015                                      dir, qstr, NULL, NULL, NULL);
1016         memset(new_xattrs, 0, sizeof(new_xattrs));
1017         lsm_xattr = new_xattrs;
1018         ret = call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir, qstr,
1019                                                 &lsm_xattr->name,
1020                                                 &lsm_xattr->value,
1021                                                 &lsm_xattr->value_len);
1022         if (ret)
1023                 goto out;
1024
1025         evm_xattr = lsm_xattr + 1;
1026         ret = evm_inode_init_security(inode, lsm_xattr, evm_xattr);
1027         if (ret)
1028                 goto out;
1029         ret = initxattrs(inode, new_xattrs, fs_data);
1030 out:
1031         for (xattr = new_xattrs; xattr->value != NULL; xattr++)
1032                 kfree(xattr->value);
1033         return (ret == -EOPNOTSUPP) ? 0 : ret;
1034 }
1035 EXPORT_SYMBOL(security_inode_init_security);
1036
1037 int security_old_inode_init_security(struct inode *inode, struct inode *dir,
1038                                      const struct qstr *qstr, const char **name,
1039                                      void **value, size_t *len)
1040 {
1041         if (unlikely(IS_PRIVATE(inode)))
1042                 return -EOPNOTSUPP;
1043         return call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir,
1044                              qstr, name, value, len);
1045 }
1046 EXPORT_SYMBOL(security_old_inode_init_security);
1047
1048 #ifdef CONFIG_SECURITY_PATH
1049 int security_path_mknod(const struct path *dir, struct dentry *dentry, umode_t mode,
1050                         unsigned int dev)
1051 {
1052         if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
1053                 return 0;
1054         return call_int_hook(path_mknod, 0, dir, dentry, mode, dev);
1055 }
1056 EXPORT_SYMBOL(security_path_mknod);
1057
1058 int security_path_mkdir(const struct path *dir, struct dentry *dentry, umode_t mode)
1059 {
1060         if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
1061                 return 0;
1062         return call_int_hook(path_mkdir, 0, dir, dentry, mode);
1063 }
1064 EXPORT_SYMBOL(security_path_mkdir);
1065
1066 int security_path_rmdir(const struct path *dir, struct dentry *dentry)
1067 {
1068         if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
1069                 return 0;
1070         return call_int_hook(path_rmdir, 0, dir, dentry);
1071 }
1072
1073 int security_path_unlink(const struct path *dir, struct dentry *dentry)
1074 {
1075         if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
1076                 return 0;
1077         return call_int_hook(path_unlink, 0, dir, dentry);
1078 }
1079 EXPORT_SYMBOL(security_path_unlink);
1080
1081 int security_path_symlink(const struct path *dir, struct dentry *dentry,
1082                           const char *old_name)
1083 {
1084         if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
1085                 return 0;
1086         return call_int_hook(path_symlink, 0, dir, dentry, old_name);
1087 }
1088
1089 int security_path_link(struct dentry *old_dentry, const struct path *new_dir,
1090                        struct dentry *new_dentry)
1091 {
1092         if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry))))
1093                 return 0;
1094         return call_int_hook(path_link, 0, old_dentry, new_dir, new_dentry);
1095 }
1096
1097 int security_path_rename(const struct path *old_dir, struct dentry *old_dentry,
1098                          const struct path *new_dir, struct dentry *new_dentry,
1099                          unsigned int flags)
1100 {
1101         if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) ||
1102                      (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry)))))
1103                 return 0;
1104
1105         if (flags & RENAME_EXCHANGE) {
1106                 int err = call_int_hook(path_rename, 0, new_dir, new_dentry,
1107                                         old_dir, old_dentry);
1108                 if (err)
1109                         return err;
1110         }
1111
1112         return call_int_hook(path_rename, 0, old_dir, old_dentry, new_dir,
1113                                 new_dentry);
1114 }
1115 EXPORT_SYMBOL(security_path_rename);
1116
1117 int security_path_truncate(const struct path *path)
1118 {
1119         if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
1120                 return 0;
1121         return call_int_hook(path_truncate, 0, path);
1122 }
1123
1124 int security_path_chmod(const struct path *path, umode_t mode)
1125 {
1126         if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
1127                 return 0;
1128         return call_int_hook(path_chmod, 0, path, mode);
1129 }
1130
1131 int security_path_chown(const struct path *path, kuid_t uid, kgid_t gid)
1132 {
1133         if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
1134                 return 0;
1135         return call_int_hook(path_chown, 0, path, uid, gid);
1136 }
1137
1138 int security_path_chroot(const struct path *path)
1139 {
1140         return call_int_hook(path_chroot, 0, path);
1141 }
1142 #endif
1143
1144 int security_inode_create(struct inode *dir, struct dentry *dentry, umode_t mode)
1145 {
1146         if (unlikely(IS_PRIVATE(dir)))
1147                 return 0;
1148         return call_int_hook(inode_create, 0, dir, dentry, mode);
1149 }
1150 EXPORT_SYMBOL_GPL(security_inode_create);
1151
1152 int security_inode_link(struct dentry *old_dentry, struct inode *dir,
1153                          struct dentry *new_dentry)
1154 {
1155         if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry))))
1156                 return 0;
1157         return call_int_hook(inode_link, 0, old_dentry, dir, new_dentry);
1158 }
1159
1160 int security_inode_unlink(struct inode *dir, struct dentry *dentry)
1161 {
1162         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1163                 return 0;
1164         return call_int_hook(inode_unlink, 0, dir, dentry);
1165 }
1166
1167 int security_inode_symlink(struct inode *dir, struct dentry *dentry,
1168                             const char *old_name)
1169 {
1170         if (unlikely(IS_PRIVATE(dir)))
1171                 return 0;
1172         return call_int_hook(inode_symlink, 0, dir, dentry, old_name);
1173 }
1174
1175 int security_inode_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
1176 {
1177         if (unlikely(IS_PRIVATE(dir)))
1178                 return 0;
1179         return call_int_hook(inode_mkdir, 0, dir, dentry, mode);
1180 }
1181 EXPORT_SYMBOL_GPL(security_inode_mkdir);
1182
1183 int security_inode_rmdir(struct inode *dir, struct dentry *dentry)
1184 {
1185         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1186                 return 0;
1187         return call_int_hook(inode_rmdir, 0, dir, dentry);
1188 }
1189
1190 int security_inode_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t dev)
1191 {
1192         if (unlikely(IS_PRIVATE(dir)))
1193                 return 0;
1194         return call_int_hook(inode_mknod, 0, dir, dentry, mode, dev);
1195 }
1196
1197 int security_inode_rename(struct inode *old_dir, struct dentry *old_dentry,
1198                            struct inode *new_dir, struct dentry *new_dentry,
1199                            unsigned int flags)
1200 {
1201         if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) ||
1202             (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry)))))
1203                 return 0;
1204
1205         if (flags & RENAME_EXCHANGE) {
1206                 int err = call_int_hook(inode_rename, 0, new_dir, new_dentry,
1207                                                      old_dir, old_dentry);
1208                 if (err)
1209                         return err;
1210         }
1211
1212         return call_int_hook(inode_rename, 0, old_dir, old_dentry,
1213                                            new_dir, new_dentry);
1214 }
1215
1216 int security_inode_readlink(struct dentry *dentry)
1217 {
1218         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1219                 return 0;
1220         return call_int_hook(inode_readlink, 0, dentry);
1221 }
1222
1223 int security_inode_follow_link(struct dentry *dentry, struct inode *inode,
1224                                bool rcu)
1225 {
1226         if (unlikely(IS_PRIVATE(inode)))
1227                 return 0;
1228         return call_int_hook(inode_follow_link, 0, dentry, inode, rcu);
1229 }
1230
1231 int security_inode_permission(struct inode *inode, int mask)
1232 {
1233         if (unlikely(IS_PRIVATE(inode)))
1234                 return 0;
1235         return call_int_hook(inode_permission, 0, inode, mask);
1236 }
1237
1238 int security_inode_setattr(struct dentry *dentry, struct iattr *attr)
1239 {
1240         int ret;
1241
1242         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1243                 return 0;
1244         ret = call_int_hook(inode_setattr, 0, dentry, attr);
1245         if (ret)
1246                 return ret;
1247         return evm_inode_setattr(dentry, attr);
1248 }
1249 EXPORT_SYMBOL_GPL(security_inode_setattr);
1250
1251 int security_inode_getattr(const struct path *path)
1252 {
1253         if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
1254                 return 0;
1255         return call_int_hook(inode_getattr, 0, path);
1256 }
1257
1258 int security_inode_setxattr(struct dentry *dentry, const char *name,
1259                             const void *value, size_t size, int flags)
1260 {
1261         int ret;
1262
1263         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1264                 return 0;
1265         /*
1266          * SELinux and Smack integrate the cap call,
1267          * so assume that all LSMs supplying this call do so.
1268          */
1269         ret = call_int_hook(inode_setxattr, 1, dentry, name, value, size,
1270                                 flags);
1271
1272         if (ret == 1)
1273                 ret = cap_inode_setxattr(dentry, name, value, size, flags);
1274         if (ret)
1275                 return ret;
1276         ret = ima_inode_setxattr(dentry, name, value, size);
1277         if (ret)
1278                 return ret;
1279         return evm_inode_setxattr(dentry, name, value, size);
1280 }
1281
1282 void security_inode_post_setxattr(struct dentry *dentry, const char *name,
1283                                   const void *value, size_t size, int flags)
1284 {
1285         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1286                 return;
1287         call_void_hook(inode_post_setxattr, dentry, name, value, size, flags);
1288         evm_inode_post_setxattr(dentry, name, value, size);
1289 }
1290
1291 int security_inode_getxattr(struct dentry *dentry, const char *name)
1292 {
1293         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1294                 return 0;
1295         return call_int_hook(inode_getxattr, 0, dentry, name);
1296 }
1297
1298 int security_inode_listxattr(struct dentry *dentry)
1299 {
1300         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1301                 return 0;
1302         return call_int_hook(inode_listxattr, 0, dentry);
1303 }
1304
1305 int security_inode_removexattr(struct dentry *dentry, const char *name)
1306 {
1307         int ret;
1308
1309         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
1310                 return 0;
1311         /*
1312          * SELinux and Smack integrate the cap call,
1313          * so assume that all LSMs supplying this call do so.
1314          */
1315         ret = call_int_hook(inode_removexattr, 1, dentry, name);
1316         if (ret == 1)
1317                 ret = cap_inode_removexattr(dentry, name);
1318         if (ret)
1319                 return ret;
1320         ret = ima_inode_removexattr(dentry, name);
1321         if (ret)
1322                 return ret;
1323         return evm_inode_removexattr(dentry, name);
1324 }
1325
1326 int security_inode_need_killpriv(struct dentry *dentry)
1327 {
1328         return call_int_hook(inode_need_killpriv, 0, dentry);
1329 }
1330
1331 int security_inode_killpriv(struct dentry *dentry)
1332 {
1333         return call_int_hook(inode_killpriv, 0, dentry);
1334 }
1335
1336 int security_inode_getsecurity(struct inode *inode, const char *name, void **buffer, bool alloc)
1337 {
1338         struct security_hook_list *hp;
1339         int rc;
1340
1341         if (unlikely(IS_PRIVATE(inode)))
1342                 return -EOPNOTSUPP;
1343         /*
1344          * Only one module will provide an attribute with a given name.
1345          */
1346         hlist_for_each_entry(hp, &security_hook_heads.inode_getsecurity, list) {
1347                 rc = hp->hook.inode_getsecurity(inode, name, buffer, alloc);
1348                 if (rc != -EOPNOTSUPP)
1349                         return rc;
1350         }
1351         return -EOPNOTSUPP;
1352 }
1353
1354 int security_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags)
1355 {
1356         struct security_hook_list *hp;
1357         int rc;
1358
1359         if (unlikely(IS_PRIVATE(inode)))
1360                 return -EOPNOTSUPP;
1361         /*
1362          * Only one module will provide an attribute with a given name.
1363          */
1364         hlist_for_each_entry(hp, &security_hook_heads.inode_setsecurity, list) {
1365                 rc = hp->hook.inode_setsecurity(inode, name, value, size,
1366                                                                 flags);
1367                 if (rc != -EOPNOTSUPP)
1368                         return rc;
1369         }
1370         return -EOPNOTSUPP;
1371 }
1372
1373 int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size)
1374 {
1375         if (unlikely(IS_PRIVATE(inode)))
1376                 return 0;
1377         return call_int_hook(inode_listsecurity, 0, inode, buffer, buffer_size);
1378 }
1379 EXPORT_SYMBOL(security_inode_listsecurity);
1380
1381 void security_inode_getsecid(struct inode *inode, u32 *secid)
1382 {
1383         call_void_hook(inode_getsecid, inode, secid);
1384 }
1385
1386 int security_inode_copy_up(struct dentry *src, struct cred **new)
1387 {
1388         return call_int_hook(inode_copy_up, 0, src, new);
1389 }
1390 EXPORT_SYMBOL(security_inode_copy_up);
1391
1392 int security_inode_copy_up_xattr(const char *name)
1393 {
1394         return call_int_hook(inode_copy_up_xattr, -EOPNOTSUPP, name);
1395 }
1396 EXPORT_SYMBOL(security_inode_copy_up_xattr);
1397
1398 int security_kernfs_init_security(struct kernfs_node *kn_dir,
1399                                   struct kernfs_node *kn)
1400 {
1401         return call_int_hook(kernfs_init_security, 0, kn_dir, kn);
1402 }
1403
1404 int security_file_permission(struct file *file, int mask)
1405 {
1406         int ret;
1407
1408         ret = call_int_hook(file_permission, 0, file, mask);
1409         if (ret)
1410                 return ret;
1411
1412         return fsnotify_perm(file, mask);
1413 }
1414
1415 int security_file_alloc(struct file *file)
1416 {
1417         int rc = lsm_file_alloc(file);
1418
1419         if (rc)
1420                 return rc;
1421         rc = call_int_hook(file_alloc_security, 0, file);
1422         if (unlikely(rc))
1423                 security_file_free(file);
1424         return rc;
1425 }
1426
1427 void security_file_free(struct file *file)
1428 {
1429         void *blob;
1430
1431         call_void_hook(file_free_security, file);
1432
1433         blob = file->f_security;
1434         if (blob) {
1435                 file->f_security = NULL;
1436                 kmem_cache_free(lsm_file_cache, blob);
1437         }
1438 }
1439
1440 int security_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1441 {
1442         return call_int_hook(file_ioctl, 0, file, cmd, arg);
1443 }
1444
1445 static inline unsigned long mmap_prot(struct file *file, unsigned long prot)
1446 {
1447         /*
1448          * Does we have PROT_READ and does the application expect
1449          * it to imply PROT_EXEC?  If not, nothing to talk about...
1450          */
1451         if ((prot & (PROT_READ | PROT_EXEC)) != PROT_READ)
1452                 return prot;
1453         if (!(current->personality & READ_IMPLIES_EXEC))
1454                 return prot;
1455         /*
1456          * if that's an anonymous mapping, let it.
1457          */
1458         if (!file)
1459                 return prot | PROT_EXEC;
1460         /*
1461          * ditto if it's not on noexec mount, except that on !MMU we need
1462          * NOMMU_MAP_EXEC (== VM_MAYEXEC) in this case
1463          */
1464         if (!path_noexec(&file->f_path)) {
1465 #ifndef CONFIG_MMU
1466                 if (file->f_op->mmap_capabilities) {
1467                         unsigned caps = file->f_op->mmap_capabilities(file);
1468                         if (!(caps & NOMMU_MAP_EXEC))
1469                                 return prot;
1470                 }
1471 #endif
1472                 return prot | PROT_EXEC;
1473         }
1474         /* anything on noexec mount won't get PROT_EXEC */
1475         return prot;
1476 }
1477
1478 int security_mmap_file(struct file *file, unsigned long prot,
1479                         unsigned long flags)
1480 {
1481         int ret;
1482         ret = call_int_hook(mmap_file, 0, file, prot,
1483                                         mmap_prot(file, prot), flags);
1484         if (ret)
1485                 return ret;
1486         return ima_file_mmap(file, prot);
1487 }
1488
1489 int security_mmap_addr(unsigned long addr)
1490 {
1491         return call_int_hook(mmap_addr, 0, addr);
1492 }
1493
1494 int security_file_mprotect(struct vm_area_struct *vma, unsigned long reqprot,
1495                             unsigned long prot)
1496 {
1497         return call_int_hook(file_mprotect, 0, vma, reqprot, prot);
1498 }
1499
1500 int security_file_lock(struct file *file, unsigned int cmd)
1501 {
1502         return call_int_hook(file_lock, 0, file, cmd);
1503 }
1504
1505 int security_file_fcntl(struct file *file, unsigned int cmd, unsigned long arg)
1506 {
1507         return call_int_hook(file_fcntl, 0, file, cmd, arg);
1508 }
1509
1510 void security_file_set_fowner(struct file *file)
1511 {
1512         call_void_hook(file_set_fowner, file);
1513 }
1514
1515 int security_file_send_sigiotask(struct task_struct *tsk,
1516                                   struct fown_struct *fown, int sig)
1517 {
1518         return call_int_hook(file_send_sigiotask, 0, tsk, fown, sig);
1519 }
1520
1521 int security_file_receive(struct file *file)
1522 {
1523         return call_int_hook(file_receive, 0, file);
1524 }
1525
1526 int security_file_open(struct file *file)
1527 {
1528         int ret;
1529
1530         ret = call_int_hook(file_open, 0, file);
1531         if (ret)
1532                 return ret;
1533
1534         return fsnotify_perm(file, MAY_OPEN);
1535 }
1536
1537 int security_task_alloc(struct task_struct *task, unsigned long clone_flags)
1538 {
1539         int rc = lsm_task_alloc(task);
1540
1541         if (rc)
1542                 return rc;
1543         rc = call_int_hook(task_alloc, 0, task, clone_flags);
1544         if (unlikely(rc))
1545                 security_task_free(task);
1546         return rc;
1547 }
1548
1549 void security_task_free(struct task_struct *task)
1550 {
1551         call_void_hook(task_free, task);
1552
1553         kfree(task->security);
1554         task->security = NULL;
1555 }
1556
1557 int security_cred_alloc_blank(struct cred *cred, gfp_t gfp)
1558 {
1559         int rc = lsm_cred_alloc(cred, gfp);
1560
1561         if (rc)
1562                 return rc;
1563
1564         rc = call_int_hook(cred_alloc_blank, 0, cred, gfp);
1565         if (unlikely(rc))
1566                 security_cred_free(cred);
1567         return rc;
1568 }
1569
1570 void security_cred_free(struct cred *cred)
1571 {
1572         /*
1573          * There is a failure case in prepare_creds() that
1574          * may result in a call here with ->security being NULL.
1575          */
1576         if (unlikely(cred->security == NULL))
1577                 return;
1578
1579         call_void_hook(cred_free, cred);
1580
1581         kfree(cred->security);
1582         cred->security = NULL;
1583 }
1584
1585 int security_prepare_creds(struct cred *new, const struct cred *old, gfp_t gfp)
1586 {
1587         int rc = lsm_cred_alloc(new, gfp);
1588
1589         if (rc)
1590                 return rc;
1591
1592         rc = call_int_hook(cred_prepare, 0, new, old, gfp);
1593         if (unlikely(rc))
1594                 security_cred_free(new);
1595         return rc;
1596 }
1597
1598 void security_transfer_creds(struct cred *new, const struct cred *old)
1599 {
1600         call_void_hook(cred_transfer, new, old);
1601 }
1602
1603 void security_cred_getsecid(const struct cred *c, u32 *secid)
1604 {
1605         *secid = 0;
1606         call_void_hook(cred_getsecid, c, secid);
1607 }
1608 EXPORT_SYMBOL(security_cred_getsecid);
1609
1610 int security_kernel_act_as(struct cred *new, u32 secid)
1611 {
1612         return call_int_hook(kernel_act_as, 0, new, secid);
1613 }
1614
1615 int security_kernel_create_files_as(struct cred *new, struct inode *inode)
1616 {
1617         return call_int_hook(kernel_create_files_as, 0, new, inode);
1618 }
1619
1620 int security_kernel_module_request(char *kmod_name)
1621 {
1622         int ret;
1623
1624         ret = call_int_hook(kernel_module_request, 0, kmod_name);
1625         if (ret)
1626                 return ret;
1627         return integrity_kernel_module_request(kmod_name);
1628 }
1629
1630 int security_kernel_read_file(struct file *file, enum kernel_read_file_id id)
1631 {
1632         int ret;
1633
1634         ret = call_int_hook(kernel_read_file, 0, file, id);
1635         if (ret)
1636                 return ret;
1637         return ima_read_file(file, id);
1638 }
1639 EXPORT_SYMBOL_GPL(security_kernel_read_file);
1640
1641 int security_kernel_post_read_file(struct file *file, char *buf, loff_t size,
1642                                    enum kernel_read_file_id id)
1643 {
1644         int ret;
1645
1646         ret = call_int_hook(kernel_post_read_file, 0, file, buf, size, id);
1647         if (ret)
1648                 return ret;
1649         return ima_post_read_file(file, buf, size, id);
1650 }
1651 EXPORT_SYMBOL_GPL(security_kernel_post_read_file);
1652
1653 int security_kernel_load_data(enum kernel_load_data_id id)
1654 {
1655         int ret;
1656
1657         ret = call_int_hook(kernel_load_data, 0, id);
1658         if (ret)
1659                 return ret;
1660         return ima_load_data(id);
1661 }
1662 EXPORT_SYMBOL_GPL(security_kernel_load_data);
1663
1664 int security_task_fix_setuid(struct cred *new, const struct cred *old,
1665                              int flags)
1666 {
1667         return call_int_hook(task_fix_setuid, 0, new, old, flags);
1668 }
1669
1670 int security_task_setpgid(struct task_struct *p, pid_t pgid)
1671 {
1672         return call_int_hook(task_setpgid, 0, p, pgid);
1673 }
1674
1675 int security_task_getpgid(struct task_struct *p)
1676 {
1677         return call_int_hook(task_getpgid, 0, p);
1678 }
1679
1680 int security_task_getsid(struct task_struct *p)
1681 {
1682         return call_int_hook(task_getsid, 0, p);
1683 }
1684
1685 void security_task_getsecid(struct task_struct *p, u32 *secid)
1686 {
1687         *secid = 0;
1688         call_void_hook(task_getsecid, p, secid);
1689 }
1690 EXPORT_SYMBOL(security_task_getsecid);
1691
1692 int security_task_setnice(struct task_struct *p, int nice)
1693 {
1694         return call_int_hook(task_setnice, 0, p, nice);
1695 }
1696
1697 int security_task_setioprio(struct task_struct *p, int ioprio)
1698 {
1699         return call_int_hook(task_setioprio, 0, p, ioprio);
1700 }
1701
1702 int security_task_getioprio(struct task_struct *p)
1703 {
1704         return call_int_hook(task_getioprio, 0, p);
1705 }
1706
1707 int security_task_prlimit(const struct cred *cred, const struct cred *tcred,
1708                           unsigned int flags)
1709 {
1710         return call_int_hook(task_prlimit, 0, cred, tcred, flags);
1711 }
1712
1713 int security_task_setrlimit(struct task_struct *p, unsigned int resource,
1714                 struct rlimit *new_rlim)
1715 {
1716         return call_int_hook(task_setrlimit, 0, p, resource, new_rlim);
1717 }
1718
1719 int security_task_setscheduler(struct task_struct *p)
1720 {
1721         return call_int_hook(task_setscheduler, 0, p);
1722 }
1723
1724 int security_task_getscheduler(struct task_struct *p)
1725 {
1726         return call_int_hook(task_getscheduler, 0, p);
1727 }
1728
1729 int security_task_movememory(struct task_struct *p)
1730 {
1731         return call_int_hook(task_movememory, 0, p);
1732 }
1733
1734 int security_task_kill(struct task_struct *p, struct kernel_siginfo *info,
1735                         int sig, const struct cred *cred)
1736 {
1737         return call_int_hook(task_kill, 0, p, info, sig, cred);
1738 }
1739
1740 int security_task_prctl(int option, unsigned long arg2, unsigned long arg3,
1741                          unsigned long arg4, unsigned long arg5)
1742 {
1743         int thisrc;
1744         int rc = -ENOSYS;
1745         struct security_hook_list *hp;
1746
1747         hlist_for_each_entry(hp, &security_hook_heads.task_prctl, list) {
1748                 thisrc = hp->hook.task_prctl(option, arg2, arg3, arg4, arg5);
1749                 if (thisrc != -ENOSYS) {
1750                         rc = thisrc;
1751                         if (thisrc != 0)
1752                                 break;
1753                 }
1754         }
1755         return rc;
1756 }
1757
1758 void security_task_to_inode(struct task_struct *p, struct inode *inode)
1759 {
1760         call_void_hook(task_to_inode, p, inode);
1761 }
1762
1763 int security_ipc_permission(struct kern_ipc_perm *ipcp, short flag)
1764 {
1765         return call_int_hook(ipc_permission, 0, ipcp, flag);
1766 }
1767
1768 void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid)
1769 {
1770         *secid = 0;
1771         call_void_hook(ipc_getsecid, ipcp, secid);
1772 }
1773
1774 int security_msg_msg_alloc(struct msg_msg *msg)
1775 {
1776         int rc = lsm_msg_msg_alloc(msg);
1777
1778         if (unlikely(rc))
1779                 return rc;
1780         rc = call_int_hook(msg_msg_alloc_security, 0, msg);
1781         if (unlikely(rc))
1782                 security_msg_msg_free(msg);
1783         return rc;
1784 }
1785
1786 void security_msg_msg_free(struct msg_msg *msg)
1787 {
1788         call_void_hook(msg_msg_free_security, msg);
1789         kfree(msg->security);
1790         msg->security = NULL;
1791 }
1792
1793 int security_msg_queue_alloc(struct kern_ipc_perm *msq)
1794 {
1795         int rc = lsm_ipc_alloc(msq);
1796
1797         if (unlikely(rc))
1798                 return rc;
1799         rc = call_int_hook(msg_queue_alloc_security, 0, msq);
1800         if (unlikely(rc))
1801                 security_msg_queue_free(msq);
1802         return rc;
1803 }
1804
1805 void security_msg_queue_free(struct kern_ipc_perm *msq)
1806 {
1807         call_void_hook(msg_queue_free_security, msq);
1808         kfree(msq->security);
1809         msq->security = NULL;
1810 }
1811
1812 int security_msg_queue_associate(struct kern_ipc_perm *msq, int msqflg)
1813 {
1814         return call_int_hook(msg_queue_associate, 0, msq, msqflg);
1815 }
1816
1817 int security_msg_queue_msgctl(struct kern_ipc_perm *msq, int cmd)
1818 {
1819         return call_int_hook(msg_queue_msgctl, 0, msq, cmd);
1820 }
1821
1822 int security_msg_queue_msgsnd(struct kern_ipc_perm *msq,
1823                                struct msg_msg *msg, int msqflg)
1824 {
1825         return call_int_hook(msg_queue_msgsnd, 0, msq, msg, msqflg);
1826 }
1827
1828 int security_msg_queue_msgrcv(struct kern_ipc_perm *msq, struct msg_msg *msg,
1829                                struct task_struct *target, long type, int mode)
1830 {
1831         return call_int_hook(msg_queue_msgrcv, 0, msq, msg, target, type, mode);
1832 }
1833
1834 int security_shm_alloc(struct kern_ipc_perm *shp)
1835 {
1836         int rc = lsm_ipc_alloc(shp);
1837
1838         if (unlikely(rc))
1839                 return rc;
1840         rc = call_int_hook(shm_alloc_security, 0, shp);
1841         if (unlikely(rc))
1842                 security_shm_free(shp);
1843         return rc;
1844 }
1845
1846 void security_shm_free(struct kern_ipc_perm *shp)
1847 {
1848         call_void_hook(shm_free_security, shp);
1849         kfree(shp->security);
1850         shp->security = NULL;
1851 }
1852
1853 int security_shm_associate(struct kern_ipc_perm *shp, int shmflg)
1854 {
1855         return call_int_hook(shm_associate, 0, shp, shmflg);
1856 }
1857
1858 int security_shm_shmctl(struct kern_ipc_perm *shp, int cmd)
1859 {
1860         return call_int_hook(shm_shmctl, 0, shp, cmd);
1861 }
1862
1863 int security_shm_shmat(struct kern_ipc_perm *shp, char __user *shmaddr, int shmflg)
1864 {
1865         return call_int_hook(shm_shmat, 0, shp, shmaddr, shmflg);
1866 }
1867
1868 int security_sem_alloc(struct kern_ipc_perm *sma)
1869 {
1870         int rc = lsm_ipc_alloc(sma);
1871
1872         if (unlikely(rc))
1873                 return rc;
1874         rc = call_int_hook(sem_alloc_security, 0, sma);
1875         if (unlikely(rc))
1876                 security_sem_free(sma);
1877         return rc;
1878 }
1879
1880 void security_sem_free(struct kern_ipc_perm *sma)
1881 {
1882         call_void_hook(sem_free_security, sma);
1883         kfree(sma->security);
1884         sma->security = NULL;
1885 }
1886
1887 int security_sem_associate(struct kern_ipc_perm *sma, int semflg)
1888 {
1889         return call_int_hook(sem_associate, 0, sma, semflg);
1890 }
1891
1892 int security_sem_semctl(struct kern_ipc_perm *sma, int cmd)
1893 {
1894         return call_int_hook(sem_semctl, 0, sma, cmd);
1895 }
1896
1897 int security_sem_semop(struct kern_ipc_perm *sma, struct sembuf *sops,
1898                         unsigned nsops, int alter)
1899 {
1900         return call_int_hook(sem_semop, 0, sma, sops, nsops, alter);
1901 }
1902
1903 void security_d_instantiate(struct dentry *dentry, struct inode *inode)
1904 {
1905         if (unlikely(inode && IS_PRIVATE(inode)))
1906                 return;
1907         call_void_hook(d_instantiate, dentry, inode);
1908 }
1909 EXPORT_SYMBOL(security_d_instantiate);
1910
1911 int security_getprocattr(struct task_struct *p, const char *lsm, char *name,
1912                                 char **value)
1913 {
1914         struct security_hook_list *hp;
1915
1916         hlist_for_each_entry(hp, &security_hook_heads.getprocattr, list) {
1917                 if (lsm != NULL && strcmp(lsm, hp->lsm))
1918                         continue;
1919                 return hp->hook.getprocattr(p, name, value);
1920         }
1921         return -EINVAL;
1922 }
1923
1924 int security_setprocattr(const char *lsm, const char *name, void *value,
1925                          size_t size)
1926 {
1927         struct security_hook_list *hp;
1928
1929         hlist_for_each_entry(hp, &security_hook_heads.setprocattr, list) {
1930                 if (lsm != NULL && strcmp(lsm, hp->lsm))
1931                         continue;
1932                 return hp->hook.setprocattr(name, value, size);
1933         }
1934         return -EINVAL;
1935 }
1936
1937 int security_netlink_send(struct sock *sk, struct sk_buff *skb)
1938 {
1939         return call_int_hook(netlink_send, 0, sk, skb);
1940 }
1941
1942 int security_ismaclabel(const char *name)
1943 {
1944         return call_int_hook(ismaclabel, 0, name);
1945 }
1946 EXPORT_SYMBOL(security_ismaclabel);
1947
1948 int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
1949 {
1950         return call_int_hook(secid_to_secctx, -EOPNOTSUPP, secid, secdata,
1951                                 seclen);
1952 }
1953 EXPORT_SYMBOL(security_secid_to_secctx);
1954
1955 int security_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid)
1956 {
1957         *secid = 0;
1958         return call_int_hook(secctx_to_secid, 0, secdata, seclen, secid);
1959 }
1960 EXPORT_SYMBOL(security_secctx_to_secid);
1961
1962 void security_release_secctx(char *secdata, u32 seclen)
1963 {
1964         call_void_hook(release_secctx, secdata, seclen);
1965 }
1966 EXPORT_SYMBOL(security_release_secctx);
1967
1968 void security_inode_invalidate_secctx(struct inode *inode)
1969 {
1970         call_void_hook(inode_invalidate_secctx, inode);
1971 }
1972 EXPORT_SYMBOL(security_inode_invalidate_secctx);
1973
1974 int security_inode_notifysecctx(struct inode *inode, void *ctx, u32 ctxlen)
1975 {
1976         return call_int_hook(inode_notifysecctx, 0, inode, ctx, ctxlen);
1977 }
1978 EXPORT_SYMBOL(security_inode_notifysecctx);
1979
1980 int security_inode_setsecctx(struct dentry *dentry, void *ctx, u32 ctxlen)
1981 {
1982         return call_int_hook(inode_setsecctx, 0, dentry, ctx, ctxlen);
1983 }
1984 EXPORT_SYMBOL(security_inode_setsecctx);
1985
1986 int security_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen)
1987 {
1988         return call_int_hook(inode_getsecctx, -EOPNOTSUPP, inode, ctx, ctxlen);
1989 }
1990 EXPORT_SYMBOL(security_inode_getsecctx);
1991
1992 #ifdef CONFIG_SECURITY_NETWORK
1993
1994 int security_unix_stream_connect(struct sock *sock, struct sock *other, struct sock *newsk)
1995 {
1996         return call_int_hook(unix_stream_connect, 0, sock, other, newsk);
1997 }
1998 EXPORT_SYMBOL(security_unix_stream_connect);
1999
2000 int security_unix_may_send(struct socket *sock,  struct socket *other)
2001 {
2002         return call_int_hook(unix_may_send, 0, sock, other);
2003 }
2004 EXPORT_SYMBOL(security_unix_may_send);
2005
2006 int security_socket_create(int family, int type, int protocol, int kern)
2007 {
2008         return call_int_hook(socket_create, 0, family, type, protocol, kern);
2009 }
2010
2011 int security_socket_post_create(struct socket *sock, int family,
2012                                 int type, int protocol, int kern)
2013 {
2014         return call_int_hook(socket_post_create, 0, sock, family, type,
2015                                                 protocol, kern);
2016 }
2017
2018 int security_socket_socketpair(struct socket *socka, struct socket *sockb)
2019 {
2020         return call_int_hook(socket_socketpair, 0, socka, sockb);
2021 }
2022 EXPORT_SYMBOL(security_socket_socketpair);
2023
2024 int security_socket_bind(struct socket *sock, struct sockaddr *address, int addrlen)
2025 {
2026         return call_int_hook(socket_bind, 0, sock, address, addrlen);
2027 }
2028
2029 int security_socket_connect(struct socket *sock, struct sockaddr *address, int addrlen)
2030 {
2031         return call_int_hook(socket_connect, 0, sock, address, addrlen);
2032 }
2033
2034 int security_socket_listen(struct socket *sock, int backlog)
2035 {
2036         return call_int_hook(socket_listen, 0, sock, backlog);
2037 }
2038
2039 int security_socket_accept(struct socket *sock, struct socket *newsock)
2040 {
2041         return call_int_hook(socket_accept, 0, sock, newsock);
2042 }
2043
2044 int security_socket_sendmsg(struct socket *sock, struct msghdr *msg, int size)
2045 {
2046         return call_int_hook(socket_sendmsg, 0, sock, msg, size);
2047 }
2048
2049 int security_socket_recvmsg(struct socket *sock, struct msghdr *msg,
2050                             int size, int flags)
2051 {
2052         return call_int_hook(socket_recvmsg, 0, sock, msg, size, flags);
2053 }
2054
2055 int security_socket_getsockname(struct socket *sock)
2056 {
2057         return call_int_hook(socket_getsockname, 0, sock);
2058 }
2059
2060 int security_socket_getpeername(struct socket *sock)
2061 {
2062         return call_int_hook(socket_getpeername, 0, sock);
2063 }
2064
2065 int security_socket_getsockopt(struct socket *sock, int level, int optname)
2066 {
2067         return call_int_hook(socket_getsockopt, 0, sock, level, optname);
2068 }
2069
2070 int security_socket_setsockopt(struct socket *sock, int level, int optname)
2071 {
2072         return call_int_hook(socket_setsockopt, 0, sock, level, optname);
2073 }
2074
2075 int security_socket_shutdown(struct socket *sock, int how)
2076 {
2077         return call_int_hook(socket_shutdown, 0, sock, how);
2078 }
2079
2080 int security_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
2081 {
2082         return call_int_hook(socket_sock_rcv_skb, 0, sk, skb);
2083 }
2084 EXPORT_SYMBOL(security_sock_rcv_skb);
2085
2086 int security_socket_getpeersec_stream(struct socket *sock, char __user *optval,
2087                                       int __user *optlen, unsigned len)
2088 {
2089         return call_int_hook(socket_getpeersec_stream, -ENOPROTOOPT, sock,
2090                                 optval, optlen, len);
2091 }
2092
2093 int security_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb, u32 *secid)
2094 {
2095         return call_int_hook(socket_getpeersec_dgram, -ENOPROTOOPT, sock,
2096                              skb, secid);
2097 }
2098 EXPORT_SYMBOL(security_socket_getpeersec_dgram);
2099
2100 int security_sk_alloc(struct sock *sk, int family, gfp_t priority)
2101 {
2102         return call_int_hook(sk_alloc_security, 0, sk, family, priority);
2103 }
2104
2105 void security_sk_free(struct sock *sk)
2106 {
2107         call_void_hook(sk_free_security, sk);
2108 }
2109
2110 void security_sk_clone(const struct sock *sk, struct sock *newsk)
2111 {
2112         call_void_hook(sk_clone_security, sk, newsk);
2113 }
2114 EXPORT_SYMBOL(security_sk_clone);
2115
2116 void security_sk_classify_flow(struct sock *sk, struct flowi *fl)
2117 {
2118         call_void_hook(sk_getsecid, sk, &fl->flowi_secid);
2119 }
2120 EXPORT_SYMBOL(security_sk_classify_flow);
2121
2122 void security_req_classify_flow(const struct request_sock *req, struct flowi *fl)
2123 {
2124         call_void_hook(req_classify_flow, req, fl);
2125 }
2126 EXPORT_SYMBOL(security_req_classify_flow);
2127
2128 void security_sock_graft(struct sock *sk, struct socket *parent)
2129 {
2130         call_void_hook(sock_graft, sk, parent);
2131 }
2132 EXPORT_SYMBOL(security_sock_graft);
2133
2134 int security_inet_conn_request(struct sock *sk,
2135                         struct sk_buff *skb, struct request_sock *req)
2136 {
2137         return call_int_hook(inet_conn_request, 0, sk, skb, req);
2138 }
2139 EXPORT_SYMBOL(security_inet_conn_request);
2140
2141 void security_inet_csk_clone(struct sock *newsk,
2142                         const struct request_sock *req)
2143 {
2144         call_void_hook(inet_csk_clone, newsk, req);
2145 }
2146
2147 void security_inet_conn_established(struct sock *sk,
2148                         struct sk_buff *skb)
2149 {
2150         call_void_hook(inet_conn_established, sk, skb);
2151 }
2152 EXPORT_SYMBOL(security_inet_conn_established);
2153
2154 int security_secmark_relabel_packet(u32 secid)
2155 {
2156         return call_int_hook(secmark_relabel_packet, 0, secid);
2157 }
2158 EXPORT_SYMBOL(security_secmark_relabel_packet);
2159
2160 void security_secmark_refcount_inc(void)
2161 {
2162         call_void_hook(secmark_refcount_inc);
2163 }
2164 EXPORT_SYMBOL(security_secmark_refcount_inc);
2165
2166 void security_secmark_refcount_dec(void)
2167 {
2168         call_void_hook(secmark_refcount_dec);
2169 }
2170 EXPORT_SYMBOL(security_secmark_refcount_dec);
2171
2172 int security_tun_dev_alloc_security(void **security)
2173 {
2174         return call_int_hook(tun_dev_alloc_security, 0, security);
2175 }
2176 EXPORT_SYMBOL(security_tun_dev_alloc_security);
2177
2178 void security_tun_dev_free_security(void *security)
2179 {
2180         call_void_hook(tun_dev_free_security, security);
2181 }
2182 EXPORT_SYMBOL(security_tun_dev_free_security);
2183
2184 int security_tun_dev_create(void)
2185 {
2186         return call_int_hook(tun_dev_create, 0);
2187 }
2188 EXPORT_SYMBOL(security_tun_dev_create);
2189
2190 int security_tun_dev_attach_queue(void *security)
2191 {
2192         return call_int_hook(tun_dev_attach_queue, 0, security);
2193 }
2194 EXPORT_SYMBOL(security_tun_dev_attach_queue);
2195
2196 int security_tun_dev_attach(struct sock *sk, void *security)
2197 {
2198         return call_int_hook(tun_dev_attach, 0, sk, security);
2199 }
2200 EXPORT_SYMBOL(security_tun_dev_attach);
2201
2202 int security_tun_dev_open(void *security)
2203 {
2204         return call_int_hook(tun_dev_open, 0, security);
2205 }
2206 EXPORT_SYMBOL(security_tun_dev_open);
2207
2208 int security_sctp_assoc_request(struct sctp_endpoint *ep, struct sk_buff *skb)
2209 {
2210         return call_int_hook(sctp_assoc_request, 0, ep, skb);
2211 }
2212 EXPORT_SYMBOL(security_sctp_assoc_request);
2213
2214 int security_sctp_bind_connect(struct sock *sk, int optname,
2215                                struct sockaddr *address, int addrlen)
2216 {
2217         return call_int_hook(sctp_bind_connect, 0, sk, optname,
2218                              address, addrlen);
2219 }
2220 EXPORT_SYMBOL(security_sctp_bind_connect);
2221
2222 void security_sctp_sk_clone(struct sctp_endpoint *ep, struct sock *sk,
2223                             struct sock *newsk)
2224 {
2225         call_void_hook(sctp_sk_clone, ep, sk, newsk);
2226 }
2227 EXPORT_SYMBOL(security_sctp_sk_clone);
2228
2229 #endif  /* CONFIG_SECURITY_NETWORK */
2230
2231 #ifdef CONFIG_SECURITY_INFINIBAND
2232
2233 int security_ib_pkey_access(void *sec, u64 subnet_prefix, u16 pkey)
2234 {
2235         return call_int_hook(ib_pkey_access, 0, sec, subnet_prefix, pkey);
2236 }
2237 EXPORT_SYMBOL(security_ib_pkey_access);
2238
2239 int security_ib_endport_manage_subnet(void *sec, const char *dev_name, u8 port_num)
2240 {
2241         return call_int_hook(ib_endport_manage_subnet, 0, sec, dev_name, port_num);
2242 }
2243 EXPORT_SYMBOL(security_ib_endport_manage_subnet);
2244
2245 int security_ib_alloc_security(void **sec)
2246 {
2247         return call_int_hook(ib_alloc_security, 0, sec);
2248 }
2249 EXPORT_SYMBOL(security_ib_alloc_security);
2250
2251 void security_ib_free_security(void *sec)
2252 {
2253         call_void_hook(ib_free_security, sec);
2254 }
2255 EXPORT_SYMBOL(security_ib_free_security);
2256 #endif  /* CONFIG_SECURITY_INFINIBAND */
2257
2258 #ifdef CONFIG_SECURITY_NETWORK_XFRM
2259
2260 int security_xfrm_policy_alloc(struct xfrm_sec_ctx **ctxp,
2261                                struct xfrm_user_sec_ctx *sec_ctx,
2262                                gfp_t gfp)
2263 {
2264         return call_int_hook(xfrm_policy_alloc_security, 0, ctxp, sec_ctx, gfp);
2265 }
2266 EXPORT_SYMBOL(security_xfrm_policy_alloc);
2267
2268 int security_xfrm_policy_clone(struct xfrm_sec_ctx *old_ctx,
2269                               struct xfrm_sec_ctx **new_ctxp)
2270 {
2271         return call_int_hook(xfrm_policy_clone_security, 0, old_ctx, new_ctxp);
2272 }
2273
2274 void security_xfrm_policy_free(struct xfrm_sec_ctx *ctx)
2275 {
2276         call_void_hook(xfrm_policy_free_security, ctx);
2277 }
2278 EXPORT_SYMBOL(security_xfrm_policy_free);
2279
2280 int security_xfrm_policy_delete(struct xfrm_sec_ctx *ctx)
2281 {
2282         return call_int_hook(xfrm_policy_delete_security, 0, ctx);
2283 }
2284
2285 int security_xfrm_state_alloc(struct xfrm_state *x,
2286                               struct xfrm_user_sec_ctx *sec_ctx)
2287 {
2288         return call_int_hook(xfrm_state_alloc, 0, x, sec_ctx);
2289 }
2290 EXPORT_SYMBOL(security_xfrm_state_alloc);
2291
2292 int security_xfrm_state_alloc_acquire(struct xfrm_state *x,
2293                                       struct xfrm_sec_ctx *polsec, u32 secid)
2294 {
2295         return call_int_hook(xfrm_state_alloc_acquire, 0, x, polsec, secid);
2296 }
2297
2298 int security_xfrm_state_delete(struct xfrm_state *x)
2299 {
2300         return call_int_hook(xfrm_state_delete_security, 0, x);
2301 }
2302 EXPORT_SYMBOL(security_xfrm_state_delete);
2303
2304 void security_xfrm_state_free(struct xfrm_state *x)
2305 {
2306         call_void_hook(xfrm_state_free_security, x);
2307 }
2308
2309 int security_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir)
2310 {
2311         return call_int_hook(xfrm_policy_lookup, 0, ctx, fl_secid, dir);
2312 }
2313
2314 int security_xfrm_state_pol_flow_match(struct xfrm_state *x,
2315                                        struct xfrm_policy *xp,
2316                                        const struct flowi *fl)
2317 {
2318         struct security_hook_list *hp;
2319         int rc = 1;
2320
2321         /*
2322          * Since this function is expected to return 0 or 1, the judgment
2323          * becomes difficult if multiple LSMs supply this call. Fortunately,
2324          * we can use the first LSM's judgment because currently only SELinux
2325          * supplies this call.
2326          *
2327          * For speed optimization, we explicitly break the loop rather than
2328          * using the macro
2329          */
2330         hlist_for_each_entry(hp, &security_hook_heads.xfrm_state_pol_flow_match,
2331                                 list) {
2332                 rc = hp->hook.xfrm_state_pol_flow_match(x, xp, fl);
2333                 break;
2334         }
2335         return rc;
2336 }
2337
2338 int security_xfrm_decode_session(struct sk_buff *skb, u32 *secid)
2339 {
2340         return call_int_hook(xfrm_decode_session, 0, skb, secid, 1);
2341 }
2342
2343 void security_skb_classify_flow(struct sk_buff *skb, struct flowi *fl)
2344 {
2345         int rc = call_int_hook(xfrm_decode_session, 0, skb, &fl->flowi_secid,
2346                                 0);
2347
2348         BUG_ON(rc);
2349 }
2350 EXPORT_SYMBOL(security_skb_classify_flow);
2351
2352 #endif  /* CONFIG_SECURITY_NETWORK_XFRM */
2353
2354 #ifdef CONFIG_KEYS
2355
2356 int security_key_alloc(struct key *key, const struct cred *cred,
2357                        unsigned long flags)
2358 {
2359         return call_int_hook(key_alloc, 0, key, cred, flags);
2360 }
2361
2362 void security_key_free(struct key *key)
2363 {
2364         call_void_hook(key_free, key);
2365 }
2366
2367 int security_key_permission(key_ref_t key_ref,
2368                             const struct cred *cred, unsigned perm)
2369 {
2370         return call_int_hook(key_permission, 0, key_ref, cred, perm);
2371 }
2372
2373 int security_key_getsecurity(struct key *key, char **_buffer)
2374 {
2375         *_buffer = NULL;
2376         return call_int_hook(key_getsecurity, 0, key, _buffer);
2377 }
2378
2379 #endif  /* CONFIG_KEYS */
2380
2381 #ifdef CONFIG_AUDIT
2382
2383 int security_audit_rule_init(u32 field, u32 op, char *rulestr, void **lsmrule)
2384 {
2385         return call_int_hook(audit_rule_init, 0, field, op, rulestr, lsmrule);
2386 }
2387
2388 int security_audit_rule_known(struct audit_krule *krule)
2389 {
2390         return call_int_hook(audit_rule_known, 0, krule);
2391 }
2392
2393 void security_audit_rule_free(void *lsmrule)
2394 {
2395         call_void_hook(audit_rule_free, lsmrule);
2396 }
2397
2398 int security_audit_rule_match(u32 secid, u32 field, u32 op, void *lsmrule)
2399 {
2400         return call_int_hook(audit_rule_match, 0, secid, field, op, lsmrule);
2401 }
2402 #endif /* CONFIG_AUDIT */
2403
2404 #ifdef CONFIG_BPF_SYSCALL
2405 int security_bpf(int cmd, union bpf_attr *attr, unsigned int size)
2406 {
2407         return call_int_hook(bpf, 0, cmd, attr, size);
2408 }
2409 int security_bpf_map(struct bpf_map *map, fmode_t fmode)
2410 {
2411         return call_int_hook(bpf_map, 0, map, fmode);
2412 }
2413 int security_bpf_prog(struct bpf_prog *prog)
2414 {
2415         return call_int_hook(bpf_prog, 0, prog);
2416 }
2417 int security_bpf_map_alloc(struct bpf_map *map)
2418 {
2419         return call_int_hook(bpf_map_alloc_security, 0, map);
2420 }
2421 int security_bpf_prog_alloc(struct bpf_prog_aux *aux)
2422 {
2423         return call_int_hook(bpf_prog_alloc_security, 0, aux);
2424 }
2425 void security_bpf_map_free(struct bpf_map *map)
2426 {
2427         call_void_hook(bpf_map_free_security, map);
2428 }
2429 void security_bpf_prog_free(struct bpf_prog_aux *aux)
2430 {
2431         call_void_hook(bpf_prog_free_security, aux);
2432 }
2433 #endif /* CONFIG_BPF_SYSCALL */
2434
2435 int security_locked_down(enum lockdown_reason what)
2436 {
2437         return call_int_hook(locked_down, 0, what);
2438 }
2439 EXPORT_SYMBOL(security_locked_down);
2440
2441 #ifdef CONFIG_PERF_EVENTS
2442 int security_perf_event_open(struct perf_event_attr *attr, int type)
2443 {
2444         return call_int_hook(perf_event_open, 0, attr, type);
2445 }
2446
2447 int security_perf_event_alloc(struct perf_event *event)
2448 {
2449         return call_int_hook(perf_event_alloc, 0, event);
2450 }
2451
2452 void security_perf_event_free(struct perf_event *event)
2453 {
2454         call_void_hook(perf_event_free, event);
2455 }
2456
2457 int security_perf_event_read(struct perf_event *event)
2458 {
2459         return call_int_hook(perf_event_read, 0, event);
2460 }
2461
2462 int security_perf_event_write(struct perf_event *event)
2463 {
2464         return call_int_hook(perf_event_write, 0, event);
2465 }
2466 #endif /* CONFIG_PERF_EVENTS */