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 <net/flow.h>
  34
  35 #define MAX_LSM_EVM_XATTR       2
  36
  37 /* Maximum number of letters for an LSM name string */
  38 #define SECURITY_NAME_MAX       10
  39
  40 /* How many LSMs were built into the kernel? */
  41 #define LSM_COUNT (__end_lsm_info - __start_lsm_info)
  42
  43 struct security_hook_heads security_hook_heads __lsm_ro_after_init;
  44 static ATOMIC_NOTIFIER_HEAD(lsm_notifier_chain);
  45
  46 char *lsm_names;
  47 /* Boot-time LSM user choice */
  48 static __initdata char chosen_lsm[SECURITY_NAME_MAX + 1] =
  49         CONFIG_DEFAULT_SECURITY;
  50 static __initdata const char *chosen_lsm_order;
  51
  52 static __initconst const char * const builtin_lsm_order = CONFIG_LSM;
  53
  54 /* Ordered list of LSMs to initialize. */
  55 static __initdata struct lsm_info **ordered_lsms;
  56
  57 static __initdata bool debug;
  58 #define init_debug(...)                                         \
  59         do {                                                    \
  60                 if (debug)                                      \
  61                         pr_info(__VA_ARGS__);                   \
  62         } while (0)
  63
  64 static bool __init is_enabled(struct lsm_info *lsm)
  65 {
  66         if (!lsm->enabled)
  67                 return false;
  68
  69         return *lsm->enabled;
  70 }
  71
  72 /* Mark an LSM's enabled flag. */
  73 static int lsm_enabled_true __initdata = 1;
  74 static int lsm_enabled_false __initdata = 0;
  75 static void __init set_enabled(struct lsm_info *lsm, bool enabled)
  76 {
  77         /*
  78          * When an LSM hasn't configured an enable variable, we can use
  79          * a hard-coded location for storing the default enabled state.
  80          */
  81         if (!lsm->enabled) {
  82                 if (enabled)
  83                         lsm->enabled = &lsm_enabled_true;
  84                 else
  85                         lsm->enabled = &lsm_enabled_false;
  86         } else if (lsm->enabled == &lsm_enabled_true) {
  87                 if (!enabled)
  88                         lsm->enabled = &lsm_enabled_false;
  89         } else if (lsm->enabled == &lsm_enabled_false) {
  90                 if (enabled)
  91                         lsm->enabled = &lsm_enabled_true;
  92         } else {
  93                 *lsm->enabled = enabled;
  94         }
  95 }
  96
  97 /* Is an LSM already listed in the ordered LSMs list? */
  98 static bool __init exists_ordered_lsm(struct lsm_info *lsm)
  99 {
 100         struct lsm_info **check;
 101
 102         for (check = ordered_lsms; *check; check++)
 103                 if (*check == lsm)
 104                         return true;
 105
 106         return false;
 107 }
 108
 109 /* Append an LSM to the list of ordered LSMs to initialize. */
 110 static int last_lsm __initdata;
 111 static void __init append_ordered_lsm(struct lsm_info *lsm, const char *from)
 112 {
 113         /* Ignore duplicate selections. */
 114         if (exists_ordered_lsm(lsm))
 115                 return;
 116
 117         if (WARN(last_lsm == LSM_COUNT, "%s: out of LSM slots!?\n", from))
 118                 return;
 119
 120         /* Enable this LSM, if it is not already set. */
 121         if (!lsm->enabled)
 122                 lsm->enabled = &lsm_enabled_true;
 123         ordered_lsms[last_lsm++] = lsm;
 124
 125         init_debug("%s ordering: %s (%sabled)\n", from, lsm->name,
 126                    is_enabled(lsm) ? "en" : "dis");
 127 }
 128
 129 /* Is an LSM allowed to be initialized? */
 130 static bool __init lsm_allowed(struct lsm_info *lsm)
 131 {
 132         /* Skip if the LSM is disabled. */
 133         if (!is_enabled(lsm))
 134                 return false;
 135
 136         /* Skip major-specific checks if not a major LSM. */
 137         if ((lsm->flags & LSM_FLAG_LEGACY_MAJOR) == 0)
 138                 return true;
 139
 140         /* Disabled if this LSM isn't the chosen one. */
 141         if (strcmp(lsm->name, chosen_lsm) != 0)
 142                 return false;
 143
 144         return true;
 145 }
 146
 147 /* Check if LSM should be initialized. */
 148 static void __init maybe_initialize_lsm(struct lsm_info *lsm)
 149 {
 150         int enabled = lsm_allowed(lsm);
 151
 152         /* Record enablement (to handle any following exclusive LSMs). */
 153         set_enabled(lsm, enabled);
 154
 155         /* If selected, initialize the LSM. */
 156         if (enabled) {
 157                 int ret;
 158
 159                 init_debug("initializing %s\n", lsm->name);
 160                 ret = lsm->init();
 161                 WARN(ret, "%s failed to initialize: %d\n", lsm->name, ret);
 162         }
 163 }
 164
 165 /* Populate ordered LSMs list from comma-separated LSM name list. */
 166 static void __init ordered_lsm_parse(const char *order, const char *origin)
 167 {
 168         struct lsm_info *lsm;
 169         char *sep, *name, *next;
 170
 171         sep = kstrdup(order, GFP_KERNEL);
 172         next = sep;
 173         /* Walk the list, looking for matching LSMs. */
 174         while ((name = strsep(&next, ",")) != NULL) {
 175                 bool found = false;
 176
 177                 for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) {
 178                         if ((lsm->flags & LSM_FLAG_LEGACY_MAJOR) == 0 &&
 179                             strcmp(lsm->name, name) == 0) {
 180                                 append_ordered_lsm(lsm, origin);
 181                                 found = true;
 182                         }
 183                 }
 184
 185                 if (!found)
 186                         init_debug("%s ignored: %s\n", origin, name);
 187         }
 188         kfree(sep);
 189 }
 190
 191 static void __init ordered_lsm_init(void)
 192 {
 193         struct lsm_info **lsm;
 194
 195         ordered_lsms = kcalloc(LSM_COUNT + 1, sizeof(*ordered_lsms),
 196                                 GFP_KERNEL);
 197
 198         if (chosen_lsm_order)
 199                 ordered_lsm_parse(chosen_lsm_order, "cmdline");
 200         else
 201                 ordered_lsm_parse(builtin_lsm_order, "builtin");
 202
 203         for (lsm = ordered_lsms; *lsm; lsm++)
 204                 maybe_initialize_lsm(*lsm);
 205
 206         kfree(ordered_lsms);
 207 }
 208
 209 static void __init major_lsm_init(void)
 210 {
 211         struct lsm_info *lsm;
 212
 213         for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) {
 214                 if ((lsm->flags & LSM_FLAG_LEGACY_MAJOR) == 0)
 215                         continue;
 216
 217                 /* Enable this LSM, if it is not already set. */
 218                 if (!lsm->enabled)
 219                         lsm->enabled = &lsm_enabled_true;
 220
 221                 maybe_initialize_lsm(lsm);
 222         }
 223 }
 224
 225 /**
 226  * security_init - initializes the security framework
 227  *
 228  * This should be called early in the kernel initialization sequence.
 229  */
 230 int __init security_init(void)
 231 {
 232         int i;
 233         struct hlist_head *list = (struct hlist_head *) &security_hook_heads;
 234
 235         pr_info("Security Framework initializing\n");
 236
 237         for (i = 0; i < sizeof(security_hook_heads) / sizeof(struct hlist_head);
 238              i++)
 239                 INIT_HLIST_HEAD(&list[i]);
 240
 241         /*
 242          * Load minor LSMs, with the capability module always first.
 243          */
 244         capability_add_hooks();
 245         yama_add_hooks();
 246         loadpin_add_hooks();
 247
 248         /* Load LSMs in specified order. */
 249         ordered_lsm_init();
 250
 251         /*
 252          * Load all the remaining security modules.
 253          */
 254         major_lsm_init();
 255
 256         return 0;
 257 }
 258
 259 /* Save user chosen LSM */
 260 static int __init choose_lsm(char *str)
 261 {
 262         strncpy(chosen_lsm, str, SECURITY_NAME_MAX);
 263         return 1;
 264 }
 265 __setup("security=", choose_lsm);
 266
 267 /* Explicitly choose LSM initialization order. */
 268 static int __init choose_lsm_order(char *str)
 269 {
 270         chosen_lsm_order = str;
 271         return 1;
 272 }
 273 __setup("lsm=", choose_lsm_order);
 274
 275 /* Enable LSM order debugging. */
 276 static int __init enable_debug(char *str)
 277 {
 278         debug = true;
 279         return 1;
 280 }
 281 __setup("lsm.debug", enable_debug);
 282
 283 static bool match_last_lsm(const char *list, const char *lsm)
 284 {
 285         const char *last;
 286
 287         if (WARN_ON(!list || !lsm))
 288                 return false;
 289         last = strrchr(list, ',');
 290         if (last)
 291                 /* Pass the comma, strcmp() will check for '\0' */
 292                 last++;
 293         else
 294                 last = list;
 295         return !strcmp(last, lsm);
 296 }
 297
 298 static int lsm_append(char *new, char **result)
 299 {
 300         char *cp;
 301
 302         if (*result == NULL) {
 303                 *result = kstrdup(new, GFP_KERNEL);
 304                 if (*result == NULL)
 305                         return -ENOMEM;
 306         } else {
 307                 /* Check if it is the last registered name */
 308                 if (match_last_lsm(*result, new))
 309                         return 0;
 310                 cp = kasprintf(GFP_KERNEL, "%s,%s", *result, new);
 311                 if (cp == NULL)
 312                         return -ENOMEM;
 313                 kfree(*result);
 314                 *result = cp;
 315         }
 316         return 0;
 317 }
 318
 319 /**
 320  * security_add_hooks - Add a modules hooks to the hook lists.
 321  * @hooks: the hooks to add
 322  * @count: the number of hooks to add
 323  * @lsm: the name of the security module
 324  *
 325  * Each LSM has to register its hooks with the infrastructure.
 326  */
 327 void __init security_add_hooks(struct security_hook_list *hooks, int count,
 328                                 char *lsm)
 329 {
 330         int i;
 331
 332         for (i = 0; i < count; i++) {
 333                 hooks[i].lsm = lsm;
 334                 hlist_add_tail_rcu(&hooks[i].list, hooks[i].head);
 335         }
 336         if (lsm_append(lsm, &lsm_names) < 0)
 337                 panic("%s - Cannot get early memory.\n", __func__);
 338 }
 339
 340 int call_lsm_notifier(enum lsm_event event, void *data)
 341 {
 342         return atomic_notifier_call_chain(&lsm_notifier_chain, event, data);
 343 }
 344 EXPORT_SYMBOL(call_lsm_notifier);
 345
 346 int register_lsm_notifier(struct notifier_block *nb)
 347 {
 348         return atomic_notifier_chain_register(&lsm_notifier_chain, nb);
 349 }
 350 EXPORT_SYMBOL(register_lsm_notifier);
 351
 352 int unregister_lsm_notifier(struct notifier_block *nb)
 353 {
 354         return atomic_notifier_chain_unregister(&lsm_notifier_chain, nb);
 355 }
 356 EXPORT_SYMBOL(unregister_lsm_notifier);
 357
 358 /*
 359  * Hook list operation macros.
 360  *
 361  * call_void_hook:
 362  *      This is a hook that does not return a value.
 363  *
 364  * call_int_hook:
 365  *      This is a hook that returns a value.
 366  */
 367
 368 #define call_void_hook(FUNC, ...)                               \
 369         do {                                                    \
 370                 struct security_hook_list *P;                   \
 371                                                                 \
 372                 hlist_for_each_entry(P, &security_hook_heads.FUNC, list) \
 373                         P->hook.FUNC(__VA_ARGS__);              \
 374         } while (0)
 375
 376 #define call_int_hook(FUNC, IRC, ...) ({                        \
 377         int RC = IRC;                                           \
 378         do {                                                    \
 379                 struct security_hook_list *P;                   \
 380                                                                 \
 381                 hlist_for_each_entry(P, &security_hook_heads.FUNC, list) { \
 382                         RC = P->hook.FUNC(__VA_ARGS__);         \
 383                         if (RC != 0)                            \
 384                                 break;                          \
 385                 }                                               \
 386         } while (0);                                            \
 387         RC;                                                     \
 388 })
 389
 390 /* Security operations */
 391
 392 int security_binder_set_context_mgr(struct task_struct *mgr)
 393 {
 394         return call_int_hook(binder_set_context_mgr, 0, mgr);
 395 }
 396
 397 int security_binder_transaction(struct task_struct *from,
 398                                 struct task_struct *to)
 399 {
 400         return call_int_hook(binder_transaction, 0, from, to);
 401 }
 402
 403 int security_binder_transfer_binder(struct task_struct *from,
 404                                     struct task_struct *to)
 405 {
 406         return call_int_hook(binder_transfer_binder, 0, from, to);
 407 }
 408
 409 int security_binder_transfer_file(struct task_struct *from,
 410                                   struct task_struct *to, struct file *file)
 411 {
 412         return call_int_hook(binder_transfer_file, 0, from, to, file);
 413 }
 414
 415 int security_ptrace_access_check(struct task_struct *child, unsigned int mode)
 416 {
 417         return call_int_hook(ptrace_access_check, 0, child, mode);
 418 }
 419
 420 int security_ptrace_traceme(struct task_struct *parent)
 421 {
 422         return call_int_hook(ptrace_traceme, 0, parent);
 423 }
 424
 425 int security_capget(struct task_struct *target,
 426                      kernel_cap_t *effective,
 427                      kernel_cap_t *inheritable,
 428                      kernel_cap_t *permitted)
 429 {
 430         return call_int_hook(capget, 0, target,
 431                                 effective, inheritable, permitted);
 432 }
 433
 434 int security_capset(struct cred *new, const struct cred *old,
 435                     const kernel_cap_t *effective,
 436                     const kernel_cap_t *inheritable,
 437                     const kernel_cap_t *permitted)
 438 {
 439         return call_int_hook(capset, 0, new, old,
 440                                 effective, inheritable, permitted);
 441 }
 442
 443 int security_capable(const struct cred *cred, struct user_namespace *ns,
 444                      int cap)
 445 {
 446         return call_int_hook(capable, 0, cred, ns, cap, SECURITY_CAP_AUDIT);
 447 }
 448
 449 int security_capable_noaudit(const struct cred *cred, struct user_namespace *ns,
 450                              int cap)
 451 {
 452         return call_int_hook(capable, 0, cred, ns, cap, SECURITY_CAP_NOAUDIT);
 453 }
 454
 455 int security_quotactl(int cmds, int type, int id, struct super_block *sb)
 456 {
 457         return call_int_hook(quotactl, 0, cmds, type, id, sb);
 458 }
 459
 460 int security_quota_on(struct dentry *dentry)
 461 {
 462         return call_int_hook(quota_on, 0, dentry);
 463 }
 464
 465 int security_syslog(int type)
 466 {
 467         return call_int_hook(syslog, 0, type);
 468 }
 469
 470 int security_settime64(const struct timespec64 *ts, const struct timezone *tz)
 471 {
 472         return call_int_hook(settime, 0, ts, tz);
 473 }
 474
 475 int security_vm_enough_memory_mm(struct mm_struct *mm, long pages)
 476 {
 477         struct security_hook_list *hp;
 478         int cap_sys_admin = 1;
 479         int rc;
 480
 481         /*
 482          * The module will respond with a positive value if
 483          * it thinks the __vm_enough_memory() call should be
 484          * made with the cap_sys_admin set. If all of the modules
 485          * agree that it should be set it will. If any module
 486          * thinks it should not be set it won't.
 487          */
 488         hlist_for_each_entry(hp, &security_hook_heads.vm_enough_memory, list) {
 489                 rc = hp->hook.vm_enough_memory(mm, pages);
 490                 if (rc <= 0) {
 491                         cap_sys_admin = 0;
 492                         break;
 493                 }
 494         }
 495         return __vm_enough_memory(mm, pages, cap_sys_admin);
 496 }
 497
 498 int security_bprm_set_creds(struct linux_binprm *bprm)
 499 {
 500         return call_int_hook(bprm_set_creds, 0, bprm);
 501 }
 502
 503 int security_bprm_check(struct linux_binprm *bprm)
 504 {
 505         int ret;
 506
 507         ret = call_int_hook(bprm_check_security, 0, bprm);
 508         if (ret)
 509                 return ret;
 510         return ima_bprm_check(bprm);
 511 }
 512
 513 void security_bprm_committing_creds(struct linux_binprm *bprm)
 514 {
 515         call_void_hook(bprm_committing_creds, bprm);
 516 }
 517
 518 void security_bprm_committed_creds(struct linux_binprm *bprm)
 519 {
 520         call_void_hook(bprm_committed_creds, bprm);
 521 }
 522
 523 int security_sb_alloc(struct super_block *sb)
 524 {
 525         return call_int_hook(sb_alloc_security, 0, sb);
 526 }
 527
 528 void security_sb_free(struct super_block *sb)
 529 {
 530         call_void_hook(sb_free_security, sb);
 531 }
 532
 533 void security_free_mnt_opts(void **mnt_opts)
 534 {
 535         if (!*mnt_opts)
 536                 return;
 537         call_void_hook(sb_free_mnt_opts, *mnt_opts);
 538         *mnt_opts = NULL;
 539 }
 540 EXPORT_SYMBOL(security_free_mnt_opts);
 541
 542 int security_sb_eat_lsm_opts(char *options, void **mnt_opts)
 543 {
 544         return call_int_hook(sb_eat_lsm_opts, 0, options, mnt_opts);
 545 }
 546 EXPORT_SYMBOL(security_sb_eat_lsm_opts);
 547
 548 int security_sb_remount(struct super_block *sb,
 549                         void *mnt_opts)
 550 {
 551         return call_int_hook(sb_remount, 0, sb, mnt_opts);
 552 }
 553 EXPORT_SYMBOL(security_sb_remount);
 554
 555 int security_sb_kern_mount(struct super_block *sb)
 556 {
 557         return call_int_hook(sb_kern_mount, 0, sb);
 558 }
 559
 560 int security_sb_show_options(struct seq_file *m, struct super_block *sb)
 561 {
 562         return call_int_hook(sb_show_options, 0, m, sb);
 563 }
 564
 565 int security_sb_statfs(struct dentry *dentry)
 566 {
 567         return call_int_hook(sb_statfs, 0, dentry);
 568 }
 569
 570 int security_sb_mount(const char *dev_name, const struct path *path,
 571                        const char *type, unsigned long flags, void *data)
 572 {
 573         return call_int_hook(sb_mount, 0, dev_name, path, type, flags, data);
 574 }
 575
 576 int security_sb_umount(struct vfsmount *mnt, int flags)
 577 {
 578         return call_int_hook(sb_umount, 0, mnt, flags);
 579 }
 580
 581 int security_sb_pivotroot(const struct path *old_path, const struct path *new_path)
 582 {
 583         return call_int_hook(sb_pivotroot, 0, old_path, new_path);
 584 }
 585
 586 int security_sb_set_mnt_opts(struct super_block *sb,
 587                                 void *mnt_opts,
 588                                 unsigned long kern_flags,
 589                                 unsigned long *set_kern_flags)
 590 {
 591         return call_int_hook(sb_set_mnt_opts,
 592                                 mnt_opts ? -EOPNOTSUPP : 0, sb,
 593                                 mnt_opts, kern_flags, set_kern_flags);
 594 }
 595 EXPORT_SYMBOL(security_sb_set_mnt_opts);
 596
 597 int security_sb_clone_mnt_opts(const struct super_block *oldsb,
 598                                 struct super_block *newsb,
 599                                 unsigned long kern_flags,
 600                                 unsigned long *set_kern_flags)
 601 {
 602         return call_int_hook(sb_clone_mnt_opts, 0, oldsb, newsb,
 603                                 kern_flags, set_kern_flags);
 604 }
 605 EXPORT_SYMBOL(security_sb_clone_mnt_opts);
 606
 607 int security_add_mnt_opt(const char *option, const char *val, int len,
 608                          void **mnt_opts)
 609 {
 610         return call_int_hook(sb_add_mnt_opt, -EINVAL,
 611                                         option, val, len, mnt_opts);
 612 }
 613 EXPORT_SYMBOL(security_add_mnt_opt);
 614
 615 int security_inode_alloc(struct inode *inode)
 616 {
 617         inode->i_security = NULL;
 618         return call_int_hook(inode_alloc_security, 0, inode);
 619 }
 620
 621 void security_inode_free(struct inode *inode)
 622 {
 623         integrity_inode_free(inode);
 624         call_void_hook(inode_free_security, inode);
 625 }
 626
 627 int security_dentry_init_security(struct dentry *dentry, int mode,
 628                                         const struct qstr *name, void **ctx,
 629                                         u32 *ctxlen)
 630 {
 631         return call_int_hook(dentry_init_security, -EOPNOTSUPP, dentry, mode,
 632                                 name, ctx, ctxlen);
 633 }
 634 EXPORT_SYMBOL(security_dentry_init_security);
 635
 636 int security_dentry_create_files_as(struct dentry *dentry, int mode,
 637                                     struct qstr *name,
 638                                     const struct cred *old, struct cred *new)
 639 {
 640         return call_int_hook(dentry_create_files_as, 0, dentry, mode,
 641                                 name, old, new);
 642 }
 643 EXPORT_SYMBOL(security_dentry_create_files_as);
 644
 645 int security_inode_init_security(struct inode *inode, struct inode *dir,
 646                                  const struct qstr *qstr,
 647                                  const initxattrs initxattrs, void *fs_data)
 648 {
 649         struct xattr new_xattrs[MAX_LSM_EVM_XATTR + 1];
 650         struct xattr *lsm_xattr, *evm_xattr, *xattr;
 651         int ret;
 652
 653         if (unlikely(IS_PRIVATE(inode)))
 654                 return 0;
 655
 656         if (!initxattrs)
 657                 return call_int_hook(inode_init_security, -EOPNOTSUPP, inode,
 658                                      dir, qstr, NULL, NULL, NULL);
 659         memset(new_xattrs, 0, sizeof(new_xattrs));
 660         lsm_xattr = new_xattrs;
 661         ret = call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir, qstr,
 662                                                 &lsm_xattr->name,
 663                                                 &lsm_xattr->value,
 664                                                 &lsm_xattr->value_len);
 665         if (ret)
 666                 goto out;
 667
 668         evm_xattr = lsm_xattr + 1;
 669         ret = evm_inode_init_security(inode, lsm_xattr, evm_xattr);
 670         if (ret)
 671                 goto out;
 672         ret = initxattrs(inode, new_xattrs, fs_data);
 673 out:
 674         for (xattr = new_xattrs; xattr->value != NULL; xattr++)
 675                 kfree(xattr->value);
 676         return (ret == -EOPNOTSUPP) ? 0 : ret;
 677 }
 678 EXPORT_SYMBOL(security_inode_init_security);
 679
 680 int security_old_inode_init_security(struct inode *inode, struct inode *dir,
 681                                      const struct qstr *qstr, const char **name,
 682                                      void **value, size_t *len)
 683 {
 684         if (unlikely(IS_PRIVATE(inode)))
 685                 return -EOPNOTSUPP;
 686         return call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir,
 687                              qstr, name, value, len);
 688 }
 689 EXPORT_SYMBOL(security_old_inode_init_security);
 690
 691 #ifdef CONFIG_SECURITY_PATH
 692 int security_path_mknod(const struct path *dir, struct dentry *dentry, umode_t mode,
 693                         unsigned int dev)
 694 {
 695         if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
 696                 return 0;
 697         return call_int_hook(path_mknod, 0, dir, dentry, mode, dev);
 698 }
 699 EXPORT_SYMBOL(security_path_mknod);
 700
 701 int security_path_mkdir(const struct path *dir, struct dentry *dentry, umode_t mode)
 702 {
 703         if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
 704                 return 0;
 705         return call_int_hook(path_mkdir, 0, dir, dentry, mode);
 706 }
 707 EXPORT_SYMBOL(security_path_mkdir);
 708
 709 int security_path_rmdir(const struct path *dir, struct dentry *dentry)
 710 {
 711         if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
 712                 return 0;
 713         return call_int_hook(path_rmdir, 0, dir, dentry);
 714 }
 715
 716 int security_path_unlink(const struct path *dir, struct dentry *dentry)
 717 {
 718         if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
 719                 return 0;
 720         return call_int_hook(path_unlink, 0, dir, dentry);
 721 }
 722 EXPORT_SYMBOL(security_path_unlink);
 723
 724 int security_path_symlink(const struct path *dir, struct dentry *dentry,
 725                           const char *old_name)
 726 {
 727         if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
 728                 return 0;
 729         return call_int_hook(path_symlink, 0, dir, dentry, old_name);
 730 }
 731
 732 int security_path_link(struct dentry *old_dentry, const struct path *new_dir,
 733                        struct dentry *new_dentry)
 734 {
 735         if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry))))
 736                 return 0;
 737         return call_int_hook(path_link, 0, old_dentry, new_dir, new_dentry);
 738 }
 739
 740 int security_path_rename(const struct path *old_dir, struct dentry *old_dentry,
 741                          const struct path *new_dir, struct dentry *new_dentry,
 742                          unsigned int flags)
 743 {
 744         if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) ||
 745                      (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry)))))
 746                 return 0;
 747
 748         if (flags & RENAME_EXCHANGE) {
 749                 int err = call_int_hook(path_rename, 0, new_dir, new_dentry,
 750                                         old_dir, old_dentry);
 751                 if (err)
 752                         return err;
 753         }
 754
 755         return call_int_hook(path_rename, 0, old_dir, old_dentry, new_dir,
 756                                 new_dentry);
 757 }
 758 EXPORT_SYMBOL(security_path_rename);
 759
 760 int security_path_truncate(const struct path *path)
 761 {
 762         if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
 763                 return 0;
 764         return call_int_hook(path_truncate, 0, path);
 765 }
 766
 767 int security_path_chmod(const struct path *path, umode_t mode)
 768 {
 769         if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
 770                 return 0;
 771         return call_int_hook(path_chmod, 0, path, mode);
 772 }
 773
 774 int security_path_chown(const struct path *path, kuid_t uid, kgid_t gid)
 775 {
 776         if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
 777                 return 0;
 778         return call_int_hook(path_chown, 0, path, uid, gid);
 779 }
 780
 781 int security_path_chroot(const struct path *path)
 782 {
 783         return call_int_hook(path_chroot, 0, path);
 784 }
 785 #endif
 786
 787 int security_inode_create(struct inode *dir, struct dentry *dentry, umode_t mode)
 788 {
 789         if (unlikely(IS_PRIVATE(dir)))
 790                 return 0;
 791         return call_int_hook(inode_create, 0, dir, dentry, mode);
 792 }
 793 EXPORT_SYMBOL_GPL(security_inode_create);
 794
 795 int security_inode_link(struct dentry *old_dentry, struct inode *dir,
 796                          struct dentry *new_dentry)
 797 {
 798         if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry))))
 799                 return 0;
 800         return call_int_hook(inode_link, 0, old_dentry, dir, new_dentry);
 801 }
 802
 803 int security_inode_unlink(struct inode *dir, struct dentry *dentry)
 804 {
 805         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
 806                 return 0;
 807         return call_int_hook(inode_unlink, 0, dir, dentry);
 808 }
 809
 810 int security_inode_symlink(struct inode *dir, struct dentry *dentry,
 811                             const char *old_name)
 812 {
 813         if (unlikely(IS_PRIVATE(dir)))
 814                 return 0;
 815         return call_int_hook(inode_symlink, 0, dir, dentry, old_name);
 816 }
 817
 818 int security_inode_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
 819 {
 820         if (unlikely(IS_PRIVATE(dir)))
 821                 return 0;
 822         return call_int_hook(inode_mkdir, 0, dir, dentry, mode);
 823 }
 824 EXPORT_SYMBOL_GPL(security_inode_mkdir);
 825
 826 int security_inode_rmdir(struct inode *dir, struct dentry *dentry)
 827 {
 828         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
 829                 return 0;
 830         return call_int_hook(inode_rmdir, 0, dir, dentry);
 831 }
 832
 833 int security_inode_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t dev)
 834 {
 835         if (unlikely(IS_PRIVATE(dir)))
 836                 return 0;
 837         return call_int_hook(inode_mknod, 0, dir, dentry, mode, dev);
 838 }
 839
 840 int security_inode_rename(struct inode *old_dir, struct dentry *old_dentry,
 841                            struct inode *new_dir, struct dentry *new_dentry,
 842                            unsigned int flags)
 843 {
 844         if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) ||
 845             (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry)))))
 846                 return 0;
 847
 848         if (flags & RENAME_EXCHANGE) {
 849                 int err = call_int_hook(inode_rename, 0, new_dir, new_dentry,
 850                                                      old_dir, old_dentry);
 851                 if (err)
 852                         return err;
 853         }
 854
 855         return call_int_hook(inode_rename, 0, old_dir, old_dentry,
 856                                            new_dir, new_dentry);
 857 }
 858
 859 int security_inode_readlink(struct dentry *dentry)
 860 {
 861         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
 862                 return 0;
 863         return call_int_hook(inode_readlink, 0, dentry);
 864 }
 865
 866 int security_inode_follow_link(struct dentry *dentry, struct inode *inode,
 867                                bool rcu)
 868 {
 869         if (unlikely(IS_PRIVATE(inode)))
 870                 return 0;
 871         return call_int_hook(inode_follow_link, 0, dentry, inode, rcu);
 872 }
 873
 874 int security_inode_permission(struct inode *inode, int mask)
 875 {
 876         if (unlikely(IS_PRIVATE(inode)))
 877                 return 0;
 878         return call_int_hook(inode_permission, 0, inode, mask);
 879 }
 880
 881 int security_inode_setattr(struct dentry *dentry, struct iattr *attr)
 882 {
 883         int ret;
 884
 885         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
 886                 return 0;
 887         ret = call_int_hook(inode_setattr, 0, dentry, attr);
 888         if (ret)
 889                 return ret;
 890         return evm_inode_setattr(dentry, attr);
 891 }
 892 EXPORT_SYMBOL_GPL(security_inode_setattr);
 893
 894 int security_inode_getattr(const struct path *path)
 895 {
 896         if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
 897                 return 0;
 898         return call_int_hook(inode_getattr, 0, path);
 899 }
 900
 901 int security_inode_setxattr(struct dentry *dentry, const char *name,
 902                             const void *value, size_t size, int flags)
 903 {
 904         int ret;
 905
 906         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
 907                 return 0;
 908         /*
 909          * SELinux and Smack integrate the cap call,
 910          * so assume that all LSMs supplying this call do so.
 911          */
 912         ret = call_int_hook(inode_setxattr, 1, dentry, name, value, size,
 913                                 flags);
 914
 915         if (ret == 1)
 916                 ret = cap_inode_setxattr(dentry, name, value, size, flags);
 917         if (ret)
 918                 return ret;
 919         ret = ima_inode_setxattr(dentry, name, value, size);
 920         if (ret)
 921                 return ret;
 922         return evm_inode_setxattr(dentry, name, value, size);
 923 }
 924
 925 void security_inode_post_setxattr(struct dentry *dentry, const char *name,
 926                                   const void *value, size_t size, int flags)
 927 {
 928         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
 929                 return;
 930         call_void_hook(inode_post_setxattr, dentry, name, value, size, flags);
 931         evm_inode_post_setxattr(dentry, name, value, size);
 932 }
 933
 934 int security_inode_getxattr(struct dentry *dentry, const char *name)
 935 {
 936         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
 937                 return 0;
 938         return call_int_hook(inode_getxattr, 0, dentry, name);
 939 }
 940
 941 int security_inode_listxattr(struct dentry *dentry)
 942 {
 943         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
 944                 return 0;
 945         return call_int_hook(inode_listxattr, 0, dentry);
 946 }
 947
 948 int security_inode_removexattr(struct dentry *dentry, const char *name)
 949 {
 950         int ret;
 951
 952         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
 953                 return 0;
 954         /*
 955          * SELinux and Smack integrate the cap call,
 956          * so assume that all LSMs supplying this call do so.
 957          */
 958         ret = call_int_hook(inode_removexattr, 1, dentry, name);
 959         if (ret == 1)
 960                 ret = cap_inode_removexattr(dentry, name);
 961         if (ret)
 962                 return ret;
 963         ret = ima_inode_removexattr(dentry, name);
 964         if (ret)
 965                 return ret;
 966         return evm_inode_removexattr(dentry, name);
 967 }
 968
 969 int security_inode_need_killpriv(struct dentry *dentry)
 970 {
 971         return call_int_hook(inode_need_killpriv, 0, dentry);
 972 }
 973
 974 int security_inode_killpriv(struct dentry *dentry)
 975 {
 976         return call_int_hook(inode_killpriv, 0, dentry);
 977 }
 978
 979 int security_inode_getsecurity(struct inode *inode, const char *name, void **buffer, bool alloc)
 980 {
 981         struct security_hook_list *hp;
 982         int rc;
 983
 984         if (unlikely(IS_PRIVATE(inode)))
 985                 return -EOPNOTSUPP;
 986         /*
 987          * Only one module will provide an attribute with a given name.
 988          */
 989         hlist_for_each_entry(hp, &security_hook_heads.inode_getsecurity, list) {
 990                 rc = hp->hook.inode_getsecurity(inode, name, buffer, alloc);
 991                 if (rc != -EOPNOTSUPP)
 992                         return rc;
 993         }
 994         return -EOPNOTSUPP;
 995 }
 996
 997 int security_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags)
 998 {
 999         struct security_hook_list *hp;
1000         int rc;
1001
1002         if (unlikely(IS_PRIVATE(inode)))
1003                 return -EOPNOTSUPP;
1004         /*
1005          * Only one module will provide an attribute with a given name.
1006          */
1007         hlist_for_each_entry(hp, &security_hook_heads.inode_setsecurity, list) {
1008                 rc = hp->hook.inode_setsecurity(inode, name, value, size,
1009                                                                 flags);
1010                 if (rc != -EOPNOTSUPP)
1011                         return rc;
1012         }
1013         return -EOPNOTSUPP;
1014 }
1015
1016 int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size)
1017 {
1018         if (unlikely(IS_PRIVATE(inode)))
1019                 return 0;
1020         return call_int_hook(inode_listsecurity, 0, inode, buffer, buffer_size);
1021 }
1022 EXPORT_SYMBOL(security_inode_listsecurity);
1023
1024 void security_inode_getsecid(struct inode *inode, u32 *secid)
1025 {
1026         call_void_hook(inode_getsecid, inode, secid);
1027 }
1028
1029 int security_inode_copy_up(struct dentry *src, struct cred **new)
1030 {
1031         return call_int_hook(inode_copy_up, 0, src, new);
1032 }
1033 EXPORT_SYMBOL(security_inode_copy_up);
1034
1035 int security_inode_copy_up_xattr(const char *name)
1036 {
1037         return call_int_hook(inode_copy_up_xattr, -EOPNOTSUPP, name);
1038 }
1039 EXPORT_SYMBOL(security_inode_copy_up_xattr);
1040
1041 int security_file_permission(struct file *file, int mask)
1042 {
1043         int ret;
1044
1045         ret = call_int_hook(file_permission, 0, file, mask);
1046         if (ret)
1047                 return ret;
1048
1049         return fsnotify_perm(file, mask);
1050 }
1051
1052 int security_file_alloc(struct file *file)
1053 {
1054         return call_int_hook(file_alloc_security, 0, file);
1055 }
1056
1057 void security_file_free(struct file *file)
1058 {
1059         call_void_hook(file_free_security, file);
1060 }
1061
1062 int security_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1063 {
1064         return call_int_hook(file_ioctl, 0, file, cmd, arg);
1065 }
1066
1067 static inline unsigned long mmap_prot(struct file *file, unsigned long prot)
1068 {
1069         /*
1070          * Does we have PROT_READ and does the application expect
1071          * it to imply PROT_EXEC?  If not, nothing to talk about...
1072          */
1073         if ((prot & (PROT_READ | PROT_EXEC)) != PROT_READ)
1074                 return prot;
1075         if (!(current->personality & READ_IMPLIES_EXEC))
1076                 return prot;
1077         /*
1078          * if that's an anonymous mapping, let it.
1079          */
1080         if (!file)
1081                 return prot | PROT_EXEC;
1082         /*
1083          * ditto if it's not on noexec mount, except that on !MMU we need
1084          * NOMMU_MAP_EXEC (== VM_MAYEXEC) in this case
1085          */
1086         if (!path_noexec(&file->f_path)) {
1087 #ifndef CONFIG_MMU
1088                 if (file->f_op->mmap_capabilities) {
1089                         unsigned caps = file->f_op->mmap_capabilities(file);
1090                         if (!(caps & NOMMU_MAP_EXEC))
1091                                 return prot;
1092                 }
1093 #endif
1094                 return prot | PROT_EXEC;
1095         }
1096         /* anything on noexec mount won't get PROT_EXEC */
1097         return prot;
1098 }
1099
1100 int security_mmap_file(struct file *file, unsigned long prot,
1101                         unsigned long flags)
1102 {
1103         int ret;
1104         ret = call_int_hook(mmap_file, 0, file, prot,
1105                                         mmap_prot(file, prot), flags);
1106         if (ret)
1107                 return ret;
1108         return ima_file_mmap(file, prot);
1109 }
1110
1111 int security_mmap_addr(unsigned long addr)
1112 {
1113         return call_int_hook(mmap_addr, 0, addr);
1114 }
1115
1116 int security_file_mprotect(struct vm_area_struct *vma, unsigned long reqprot,
1117                             unsigned long prot)
1118 {
1119         return call_int_hook(file_mprotect, 0, vma, reqprot, prot);
1120 }
1121
1122 int security_file_lock(struct file *file, unsigned int cmd)
1123 {
1124         return call_int_hook(file_lock, 0, file, cmd);
1125 }
1126
1127 int security_file_fcntl(struct file *file, unsigned int cmd, unsigned long arg)
1128 {
1129         return call_int_hook(file_fcntl, 0, file, cmd, arg);
1130 }
1131
1132 void security_file_set_fowner(struct file *file)
1133 {
1134         call_void_hook(file_set_fowner, file);
1135 }
1136
1137 int security_file_send_sigiotask(struct task_struct *tsk,
1138                                   struct fown_struct *fown, int sig)
1139 {
1140         return call_int_hook(file_send_sigiotask, 0, tsk, fown, sig);
1141 }
1142
1143 int security_file_receive(struct file *file)
1144 {
1145         return call_int_hook(file_receive, 0, file);
1146 }
1147
1148 int security_file_open(struct file *file)
1149 {
1150         int ret;
1151
1152         ret = call_int_hook(file_open, 0, file);
1153         if (ret)
1154                 return ret;
1155
1156         return fsnotify_perm(file, MAY_OPEN);
1157 }
1158
1159 int security_task_alloc(struct task_struct *task, unsigned long clone_flags)
1160 {
1161         return call_int_hook(task_alloc, 0, task, clone_flags);
1162 }
1163
1164 void security_task_free(struct task_struct *task)
1165 {
1166         call_void_hook(task_free, task);
1167 }
1168
1169 int security_cred_alloc_blank(struct cred *cred, gfp_t gfp)
1170 {
1171         return call_int_hook(cred_alloc_blank, 0, cred, gfp);
1172 }
1173
1174 void security_cred_free(struct cred *cred)
1175 {
1176         call_void_hook(cred_free, cred);
1177 }
1178
1179 int security_prepare_creds(struct cred *new, const struct cred *old, gfp_t gfp)
1180 {
1181         return call_int_hook(cred_prepare, 0, new, old, gfp);
1182 }
1183
1184 void security_transfer_creds(struct cred *new, const struct cred *old)
1185 {
1186         call_void_hook(cred_transfer, new, old);
1187 }
1188
1189 void security_cred_getsecid(const struct cred *c, u32 *secid)
1190 {
1191         *secid = 0;
1192         call_void_hook(cred_getsecid, c, secid);
1193 }
1194 EXPORT_SYMBOL(security_cred_getsecid);
1195
1196 int security_kernel_act_as(struct cred *new, u32 secid)
1197 {
1198         return call_int_hook(kernel_act_as, 0, new, secid);
1199 }
1200
1201 int security_kernel_create_files_as(struct cred *new, struct inode *inode)
1202 {
1203         return call_int_hook(kernel_create_files_as, 0, new, inode);
1204 }
1205
1206 int security_kernel_module_request(char *kmod_name)
1207 {
1208         int ret;
1209
1210         ret = call_int_hook(kernel_module_request, 0, kmod_name);
1211         if (ret)
1212                 return ret;
1213         return integrity_kernel_module_request(kmod_name);
1214 }
1215
1216 int security_kernel_read_file(struct file *file, enum kernel_read_file_id id)
1217 {
1218         int ret;
1219
1220         ret = call_int_hook(kernel_read_file, 0, file, id);
1221         if (ret)
1222                 return ret;
1223         return ima_read_file(file, id);
1224 }
1225 EXPORT_SYMBOL_GPL(security_kernel_read_file);
1226
1227 int security_kernel_post_read_file(struct file *file, char *buf, loff_t size,
1228                                    enum kernel_read_file_id id)
1229 {
1230         int ret;
1231
1232         ret = call_int_hook(kernel_post_read_file, 0, file, buf, size, id);
1233         if (ret)
1234                 return ret;
1235         return ima_post_read_file(file, buf, size, id);
1236 }
1237 EXPORT_SYMBOL_GPL(security_kernel_post_read_file);
1238
1239 int security_kernel_load_data(enum kernel_load_data_id id)
1240 {
1241         int ret;
1242
1243         ret = call_int_hook(kernel_load_data, 0, id);
1244         if (ret)
1245                 return ret;
1246         return ima_load_data(id);
1247 }
1248 EXPORT_SYMBOL_GPL(security_kernel_load_data);
1249
1250 int security_task_fix_setuid(struct cred *new, const struct cred *old,
1251                              int flags)
1252 {
1253         return call_int_hook(task_fix_setuid, 0, new, old, flags);
1254 }
1255
1256 int security_task_setpgid(struct task_struct *p, pid_t pgid)
1257 {
1258         return call_int_hook(task_setpgid, 0, p, pgid);
1259 }
1260
1261 int security_task_getpgid(struct task_struct *p)
1262 {
1263         return call_int_hook(task_getpgid, 0, p);
1264 }
1265
1266 int security_task_getsid(struct task_struct *p)
1267 {
1268         return call_int_hook(task_getsid, 0, p);
1269 }
1270
1271 void security_task_getsecid(struct task_struct *p, u32 *secid)
1272 {
1273         *secid = 0;
1274         call_void_hook(task_getsecid, p, secid);
1275 }
1276 EXPORT_SYMBOL(security_task_getsecid);
1277
1278 int security_task_setnice(struct task_struct *p, int nice)
1279 {
1280         return call_int_hook(task_setnice, 0, p, nice);
1281 }
1282
1283 int security_task_setioprio(struct task_struct *p, int ioprio)
1284 {
1285         return call_int_hook(task_setioprio, 0, p, ioprio);
1286 }
1287
1288 int security_task_getioprio(struct task_struct *p)
1289 {
1290         return call_int_hook(task_getioprio, 0, p);
1291 }
1292
1293 int security_task_prlimit(const struct cred *cred, const struct cred *tcred,
1294                           unsigned int flags)
1295 {
1296         return call_int_hook(task_prlimit, 0, cred, tcred, flags);
1297 }
1298
1299 int security_task_setrlimit(struct task_struct *p, unsigned int resource,
1300                 struct rlimit *new_rlim)
1301 {
1302         return call_int_hook(task_setrlimit, 0, p, resource, new_rlim);
1303 }
1304
1305 int security_task_setscheduler(struct task_struct *p)
1306 {
1307         return call_int_hook(task_setscheduler, 0, p);
1308 }
1309
1310 int security_task_getscheduler(struct task_struct *p)
1311 {
1312         return call_int_hook(task_getscheduler, 0, p);
1313 }
1314
1315 int security_task_movememory(struct task_struct *p)
1316 {
1317         return call_int_hook(task_movememory, 0, p);
1318 }
1319
1320 int security_task_kill(struct task_struct *p, struct kernel_siginfo *info,
1321                         int sig, const struct cred *cred)
1322 {
1323         return call_int_hook(task_kill, 0, p, info, sig, cred);
1324 }
1325
1326 int security_task_prctl(int option, unsigned long arg2, unsigned long arg3,
1327                          unsigned long arg4, unsigned long arg5)
1328 {
1329         int thisrc;
1330         int rc = -ENOSYS;
1331         struct security_hook_list *hp;
1332
1333         hlist_for_each_entry(hp, &security_hook_heads.task_prctl, list) {
1334                 thisrc = hp->hook.task_prctl(option, arg2, arg3, arg4, arg5);
1335                 if (thisrc != -ENOSYS) {
1336                         rc = thisrc;
1337                         if (thisrc != 0)
1338                                 break;
1339                 }
1340         }
1341         return rc;
1342 }
1343
1344 void security_task_to_inode(struct task_struct *p, struct inode *inode)
1345 {
1346         call_void_hook(task_to_inode, p, inode);
1347 }
1348
1349 int security_ipc_permission(struct kern_ipc_perm *ipcp, short flag)
1350 {
1351         return call_int_hook(ipc_permission, 0, ipcp, flag);
1352 }
1353
1354 void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid)
1355 {
1356         *secid = 0;
1357         call_void_hook(ipc_getsecid, ipcp, secid);
1358 }
1359
1360 int security_msg_msg_alloc(struct msg_msg *msg)
1361 {
1362         return call_int_hook(msg_msg_alloc_security, 0, msg);
1363 }
1364
1365 void security_msg_msg_free(struct msg_msg *msg)
1366 {
1367         call_void_hook(msg_msg_free_security, msg);
1368 }
1369
1370 int security_msg_queue_alloc(struct kern_ipc_perm *msq)
1371 {
1372         return call_int_hook(msg_queue_alloc_security, 0, msq);
1373 }
1374
1375 void security_msg_queue_free(struct kern_ipc_perm *msq)
1376 {
1377         call_void_hook(msg_queue_free_security, msq);
1378 }
1379
1380 int security_msg_queue_associate(struct kern_ipc_perm *msq, int msqflg)
1381 {
1382         return call_int_hook(msg_queue_associate, 0, msq, msqflg);
1383 }
1384
1385 int security_msg_queue_msgctl(struct kern_ipc_perm *msq, int cmd)
1386 {
1387         return call_int_hook(msg_queue_msgctl, 0, msq, cmd);
1388 }
1389
1390 int security_msg_queue_msgsnd(struct kern_ipc_perm *msq,
1391                                struct msg_msg *msg, int msqflg)
1392 {
1393         return call_int_hook(msg_queue_msgsnd, 0, msq, msg, msqflg);
1394 }
1395
1396 int security_msg_queue_msgrcv(struct kern_ipc_perm *msq, struct msg_msg *msg,
1397                                struct task_struct *target, long type, int mode)
1398 {
1399         return call_int_hook(msg_queue_msgrcv, 0, msq, msg, target, type, mode);
1400 }
1401
1402 int security_shm_alloc(struct kern_ipc_perm *shp)
1403 {
1404         return call_int_hook(shm_alloc_security, 0, shp);
1405 }
1406
1407 void security_shm_free(struct kern_ipc_perm *shp)
1408 {
1409         call_void_hook(shm_free_security, shp);
1410 }
1411
1412 int security_shm_associate(struct kern_ipc_perm *shp, int shmflg)
1413 {
1414         return call_int_hook(shm_associate, 0, shp, shmflg);
1415 }
1416
1417 int security_shm_shmctl(struct kern_ipc_perm *shp, int cmd)
1418 {
1419         return call_int_hook(shm_shmctl, 0, shp, cmd);
1420 }
1421
1422 int security_shm_shmat(struct kern_ipc_perm *shp, char __user *shmaddr, int shmflg)
1423 {
1424         return call_int_hook(shm_shmat, 0, shp, shmaddr, shmflg);
1425 }
1426
1427 int security_sem_alloc(struct kern_ipc_perm *sma)
1428 {
1429         return call_int_hook(sem_alloc_security, 0, sma);
1430 }
1431
1432 void security_sem_free(struct kern_ipc_perm *sma)
1433 {
1434         call_void_hook(sem_free_security, sma);
1435 }
1436
1437 int security_sem_associate(struct kern_ipc_perm *sma, int semflg)
1438 {
1439         return call_int_hook(sem_associate, 0, sma, semflg);
1440 }
1441
1442 int security_sem_semctl(struct kern_ipc_perm *sma, int cmd)
1443 {
1444         return call_int_hook(sem_semctl, 0, sma, cmd);
1445 }
1446
1447 int security_sem_semop(struct kern_ipc_perm *sma, struct sembuf *sops,
1448                         unsigned nsops, int alter)
1449 {
1450         return call_int_hook(sem_semop, 0, sma, sops, nsops, alter);
1451 }
1452
1453 void security_d_instantiate(struct dentry *dentry, struct inode *inode)
1454 {
1455         if (unlikely(inode && IS_PRIVATE(inode)))
1456                 return;
1457         call_void_hook(d_instantiate, dentry, inode);
1458 }
1459 EXPORT_SYMBOL(security_d_instantiate);
1460
1461 int security_getprocattr(struct task_struct *p, char *name, char **value)
1462 {
1463         return call_int_hook(getprocattr, -EINVAL, p, name, value);
1464 }
1465
1466 int security_setprocattr(const char *name, void *value, size_t size)
1467 {
1468         return call_int_hook(setprocattr, -EINVAL, name, value, size);
1469 }
1470
1471 int security_netlink_send(struct sock *sk, struct sk_buff *skb)
1472 {
1473         return call_int_hook(netlink_send, 0, sk, skb);
1474 }
1475
1476 int security_ismaclabel(const char *name)
1477 {
1478         return call_int_hook(ismaclabel, 0, name);
1479 }
1480 EXPORT_SYMBOL(security_ismaclabel);
1481
1482 int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
1483 {
1484         return call_int_hook(secid_to_secctx, -EOPNOTSUPP, secid, secdata,
1485                                 seclen);
1486 }
1487 EXPORT_SYMBOL(security_secid_to_secctx);
1488
1489 int security_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid)
1490 {
1491         *secid = 0;
1492         return call_int_hook(secctx_to_secid, 0, secdata, seclen, secid);
1493 }
1494 EXPORT_SYMBOL(security_secctx_to_secid);
1495
1496 void security_release_secctx(char *secdata, u32 seclen)
1497 {
1498         call_void_hook(release_secctx, secdata, seclen);
1499 }
1500 EXPORT_SYMBOL(security_release_secctx);
1501
1502 void security_inode_invalidate_secctx(struct inode *inode)
1503 {
1504         call_void_hook(inode_invalidate_secctx, inode);
1505 }
1506 EXPORT_SYMBOL(security_inode_invalidate_secctx);
1507
1508 int security_inode_notifysecctx(struct inode *inode, void *ctx, u32 ctxlen)
1509 {
1510         return call_int_hook(inode_notifysecctx, 0, inode, ctx, ctxlen);
1511 }
1512 EXPORT_SYMBOL(security_inode_notifysecctx);
1513
1514 int security_inode_setsecctx(struct dentry *dentry, void *ctx, u32 ctxlen)
1515 {
1516         return call_int_hook(inode_setsecctx, 0, dentry, ctx, ctxlen);
1517 }
1518 EXPORT_SYMBOL(security_inode_setsecctx);
1519
1520 int security_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen)
1521 {
1522         return call_int_hook(inode_getsecctx, -EOPNOTSUPP, inode, ctx, ctxlen);
1523 }
1524 EXPORT_SYMBOL(security_inode_getsecctx);
1525
1526 #ifdef CONFIG_SECURITY_NETWORK
1527
1528 int security_unix_stream_connect(struct sock *sock, struct sock *other, struct sock *newsk)
1529 {
1530         return call_int_hook(unix_stream_connect, 0, sock, other, newsk);
1531 }
1532 EXPORT_SYMBOL(security_unix_stream_connect);
1533
1534 int security_unix_may_send(struct socket *sock,  struct socket *other)
1535 {
1536         return call_int_hook(unix_may_send, 0, sock, other);
1537 }
1538 EXPORT_SYMBOL(security_unix_may_send);
1539
1540 int security_socket_create(int family, int type, int protocol, int kern)
1541 {
1542         return call_int_hook(socket_create, 0, family, type, protocol, kern);
1543 }
1544
1545 int security_socket_post_create(struct socket *sock, int family,
1546                                 int type, int protocol, int kern)
1547 {
1548         return call_int_hook(socket_post_create, 0, sock, family, type,
1549                                                 protocol, kern);
1550 }
1551
1552 int security_socket_socketpair(struct socket *socka, struct socket *sockb)
1553 {
1554         return call_int_hook(socket_socketpair, 0, socka, sockb);
1555 }
1556 EXPORT_SYMBOL(security_socket_socketpair);
1557
1558 int security_socket_bind(struct socket *sock, struct sockaddr *address, int addrlen)
1559 {
1560         return call_int_hook(socket_bind, 0, sock, address, addrlen);
1561 }
1562
1563 int security_socket_connect(struct socket *sock, struct sockaddr *address, int addrlen)
1564 {
1565         return call_int_hook(socket_connect, 0, sock, address, addrlen);
1566 }
1567
1568 int security_socket_listen(struct socket *sock, int backlog)
1569 {
1570         return call_int_hook(socket_listen, 0, sock, backlog);
1571 }
1572
1573 int security_socket_accept(struct socket *sock, struct socket *newsock)
1574 {
1575         return call_int_hook(socket_accept, 0, sock, newsock);
1576 }
1577
1578 int security_socket_sendmsg(struct socket *sock, struct msghdr *msg, int size)
1579 {
1580         return call_int_hook(socket_sendmsg, 0, sock, msg, size);
1581 }
1582
1583 int security_socket_recvmsg(struct socket *sock, struct msghdr *msg,
1584                             int size, int flags)
1585 {
1586         return call_int_hook(socket_recvmsg, 0, sock, msg, size, flags);
1587 }
1588
1589 int security_socket_getsockname(struct socket *sock)
1590 {
1591         return call_int_hook(socket_getsockname, 0, sock);
1592 }
1593
1594 int security_socket_getpeername(struct socket *sock)
1595 {
1596         return call_int_hook(socket_getpeername, 0, sock);
1597 }
1598
1599 int security_socket_getsockopt(struct socket *sock, int level, int optname)
1600 {
1601         return call_int_hook(socket_getsockopt, 0, sock, level, optname);
1602 }
1603
1604 int security_socket_setsockopt(struct socket *sock, int level, int optname)
1605 {
1606         return call_int_hook(socket_setsockopt, 0, sock, level, optname);
1607 }
1608
1609 int security_socket_shutdown(struct socket *sock, int how)
1610 {
1611         return call_int_hook(socket_shutdown, 0, sock, how);
1612 }
1613
1614 int security_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
1615 {
1616         return call_int_hook(socket_sock_rcv_skb, 0, sk, skb);
1617 }
1618 EXPORT_SYMBOL(security_sock_rcv_skb);
1619
1620 int security_socket_getpeersec_stream(struct socket *sock, char __user *optval,
1621                                       int __user *optlen, unsigned len)
1622 {
1623         return call_int_hook(socket_getpeersec_stream, -ENOPROTOOPT, sock,
1624                                 optval, optlen, len);
1625 }
1626
1627 int security_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb, u32 *secid)
1628 {
1629         return call_int_hook(socket_getpeersec_dgram, -ENOPROTOOPT, sock,
1630                              skb, secid);
1631 }
1632 EXPORT_SYMBOL(security_socket_getpeersec_dgram);
1633
1634 int security_sk_alloc(struct sock *sk, int family, gfp_t priority)
1635 {
1636         return call_int_hook(sk_alloc_security, 0, sk, family, priority);
1637 }
1638
1639 void security_sk_free(struct sock *sk)
1640 {
1641         call_void_hook(sk_free_security, sk);
1642 }
1643
1644 void security_sk_clone(const struct sock *sk, struct sock *newsk)
1645 {
1646         call_void_hook(sk_clone_security, sk, newsk);
1647 }
1648 EXPORT_SYMBOL(security_sk_clone);
1649
1650 void security_sk_classify_flow(struct sock *sk, struct flowi *fl)
1651 {
1652         call_void_hook(sk_getsecid, sk, &fl->flowi_secid);
1653 }
1654 EXPORT_SYMBOL(security_sk_classify_flow);
1655
1656 void security_req_classify_flow(const struct request_sock *req, struct flowi *fl)
1657 {
1658         call_void_hook(req_classify_flow, req, fl);
1659 }
1660 EXPORT_SYMBOL(security_req_classify_flow);
1661
1662 void security_sock_graft(struct sock *sk, struct socket *parent)
1663 {
1664         call_void_hook(sock_graft, sk, parent);
1665 }
1666 EXPORT_SYMBOL(security_sock_graft);
1667
1668 int security_inet_conn_request(struct sock *sk,
1669                         struct sk_buff *skb, struct request_sock *req)
1670 {
1671         return call_int_hook(inet_conn_request, 0, sk, skb, req);
1672 }
1673 EXPORT_SYMBOL(security_inet_conn_request);
1674
1675 void security_inet_csk_clone(struct sock *newsk,
1676                         const struct request_sock *req)
1677 {
1678         call_void_hook(inet_csk_clone, newsk, req);
1679 }
1680
1681 void security_inet_conn_established(struct sock *sk,
1682                         struct sk_buff *skb)
1683 {
1684         call_void_hook(inet_conn_established, sk, skb);
1685 }
1686 EXPORT_SYMBOL(security_inet_conn_established);
1687
1688 int security_secmark_relabel_packet(u32 secid)
1689 {
1690         return call_int_hook(secmark_relabel_packet, 0, secid);
1691 }
1692 EXPORT_SYMBOL(security_secmark_relabel_packet);
1693
1694 void security_secmark_refcount_inc(void)
1695 {
1696         call_void_hook(secmark_refcount_inc);
1697 }
1698 EXPORT_SYMBOL(security_secmark_refcount_inc);
1699
1700 void security_secmark_refcount_dec(void)
1701 {
1702         call_void_hook(secmark_refcount_dec);
1703 }
1704 EXPORT_SYMBOL(security_secmark_refcount_dec);
1705
1706 int security_tun_dev_alloc_security(void **security)
1707 {
1708         return call_int_hook(tun_dev_alloc_security, 0, security);
1709 }
1710 EXPORT_SYMBOL(security_tun_dev_alloc_security);
1711
1712 void security_tun_dev_free_security(void *security)
1713 {
1714         call_void_hook(tun_dev_free_security, security);
1715 }
1716 EXPORT_SYMBOL(security_tun_dev_free_security);
1717
1718 int security_tun_dev_create(void)
1719 {
1720         return call_int_hook(tun_dev_create, 0);
1721 }
1722 EXPORT_SYMBOL(security_tun_dev_create);
1723
1724 int security_tun_dev_attach_queue(void *security)
1725 {
1726         return call_int_hook(tun_dev_attach_queue, 0, security);
1727 }
1728 EXPORT_SYMBOL(security_tun_dev_attach_queue);
1729
1730 int security_tun_dev_attach(struct sock *sk, void *security)
1731 {
1732         return call_int_hook(tun_dev_attach, 0, sk, security);
1733 }
1734 EXPORT_SYMBOL(security_tun_dev_attach);
1735
1736 int security_tun_dev_open(void *security)
1737 {
1738         return call_int_hook(tun_dev_open, 0, security);
1739 }
1740 EXPORT_SYMBOL(security_tun_dev_open);
1741
1742 int security_sctp_assoc_request(struct sctp_endpoint *ep, struct sk_buff *skb)
1743 {
1744         return call_int_hook(sctp_assoc_request, 0, ep, skb);
1745 }
1746 EXPORT_SYMBOL(security_sctp_assoc_request);
1747
1748 int security_sctp_bind_connect(struct sock *sk, int optname,
1749                                struct sockaddr *address, int addrlen)
1750 {
1751         return call_int_hook(sctp_bind_connect, 0, sk, optname,
1752                              address, addrlen);
1753 }
1754 EXPORT_SYMBOL(security_sctp_bind_connect);
1755
1756 void security_sctp_sk_clone(struct sctp_endpoint *ep, struct sock *sk,
1757                             struct sock *newsk)
1758 {
1759         call_void_hook(sctp_sk_clone, ep, sk, newsk);
1760 }
1761 EXPORT_SYMBOL(security_sctp_sk_clone);
1762
1763 #endif  /* CONFIG_SECURITY_NETWORK */
1764
1765 #ifdef CONFIG_SECURITY_INFINIBAND
1766
1767 int security_ib_pkey_access(void *sec, u64 subnet_prefix, u16 pkey)
1768 {
1769         return call_int_hook(ib_pkey_access, 0, sec, subnet_prefix, pkey);
1770 }
1771 EXPORT_SYMBOL(security_ib_pkey_access);
1772
1773 int security_ib_endport_manage_subnet(void *sec, const char *dev_name, u8 port_num)
1774 {
1775         return call_int_hook(ib_endport_manage_subnet, 0, sec, dev_name, port_num);
1776 }
1777 EXPORT_SYMBOL(security_ib_endport_manage_subnet);
1778
1779 int security_ib_alloc_security(void **sec)
1780 {
1781         return call_int_hook(ib_alloc_security, 0, sec);
1782 }
1783 EXPORT_SYMBOL(security_ib_alloc_security);
1784
1785 void security_ib_free_security(void *sec)
1786 {
1787         call_void_hook(ib_free_security, sec);
1788 }
1789 EXPORT_SYMBOL(security_ib_free_security);
1790 #endif  /* CONFIG_SECURITY_INFINIBAND */
1791
1792 #ifdef CONFIG_SECURITY_NETWORK_XFRM
1793
1794 int security_xfrm_policy_alloc(struct xfrm_sec_ctx **ctxp,
1795                                struct xfrm_user_sec_ctx *sec_ctx,
1796                                gfp_t gfp)
1797 {
1798         return call_int_hook(xfrm_policy_alloc_security, 0, ctxp, sec_ctx, gfp);
1799 }
1800 EXPORT_SYMBOL(security_xfrm_policy_alloc);
1801
1802 int security_xfrm_policy_clone(struct xfrm_sec_ctx *old_ctx,
1803                               struct xfrm_sec_ctx **new_ctxp)
1804 {
1805         return call_int_hook(xfrm_policy_clone_security, 0, old_ctx, new_ctxp);
1806 }
1807
1808 void security_xfrm_policy_free(struct xfrm_sec_ctx *ctx)
1809 {
1810         call_void_hook(xfrm_policy_free_security, ctx);
1811 }
1812 EXPORT_SYMBOL(security_xfrm_policy_free);
1813
1814 int security_xfrm_policy_delete(struct xfrm_sec_ctx *ctx)
1815 {
1816         return call_int_hook(xfrm_policy_delete_security, 0, ctx);
1817 }
1818
1819 int security_xfrm_state_alloc(struct xfrm_state *x,
1820                               struct xfrm_user_sec_ctx *sec_ctx)
1821 {
1822         return call_int_hook(xfrm_state_alloc, 0, x, sec_ctx);
1823 }
1824 EXPORT_SYMBOL(security_xfrm_state_alloc);
1825
1826 int security_xfrm_state_alloc_acquire(struct xfrm_state *x,
1827                                       struct xfrm_sec_ctx *polsec, u32 secid)
1828 {
1829         return call_int_hook(xfrm_state_alloc_acquire, 0, x, polsec, secid);
1830 }
1831
1832 int security_xfrm_state_delete(struct xfrm_state *x)
1833 {
1834         return call_int_hook(xfrm_state_delete_security, 0, x);
1835 }
1836 EXPORT_SYMBOL(security_xfrm_state_delete);
1837
1838 void security_xfrm_state_free(struct xfrm_state *x)
1839 {
1840         call_void_hook(xfrm_state_free_security, x);
1841 }
1842
1843 int security_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir)
1844 {
1845         return call_int_hook(xfrm_policy_lookup, 0, ctx, fl_secid, dir);
1846 }
1847
1848 int security_xfrm_state_pol_flow_match(struct xfrm_state *x,
1849                                        struct xfrm_policy *xp,
1850                                        const struct flowi *fl)
1851 {
1852         struct security_hook_list *hp;
1853         int rc = 1;
1854
1855         /*
1856          * Since this function is expected to return 0 or 1, the judgment
1857          * becomes difficult if multiple LSMs supply this call. Fortunately,
1858          * we can use the first LSM's judgment because currently only SELinux
1859          * supplies this call.
1860          *
1861          * For speed optimization, we explicitly break the loop rather than
1862          * using the macro
1863          */
1864         hlist_for_each_entry(hp, &security_hook_heads.xfrm_state_pol_flow_match,
1865                                 list) {
1866                 rc = hp->hook.xfrm_state_pol_flow_match(x, xp, fl);
1867                 break;
1868         }
1869         return rc;
1870 }
1871
1872 int security_xfrm_decode_session(struct sk_buff *skb, u32 *secid)
1873 {
1874         return call_int_hook(xfrm_decode_session, 0, skb, secid, 1);
1875 }
1876
1877 void security_skb_classify_flow(struct sk_buff *skb, struct flowi *fl)
1878 {
1879         int rc = call_int_hook(xfrm_decode_session, 0, skb, &fl->flowi_secid,
1880                                 0);
1881
1882         BUG_ON(rc);
1883 }
1884 EXPORT_SYMBOL(security_skb_classify_flow);
1885
1886 #endif  /* CONFIG_SECURITY_NETWORK_XFRM */
1887
1888 #ifdef CONFIG_KEYS
1889
1890 int security_key_alloc(struct key *key, const struct cred *cred,
1891                        unsigned long flags)
1892 {
1893         return call_int_hook(key_alloc, 0, key, cred, flags);
1894 }
1895
1896 void security_key_free(struct key *key)
1897 {
1898         call_void_hook(key_free, key);
1899 }
1900
1901 int security_key_permission(key_ref_t key_ref,
1902                             const struct cred *cred, unsigned perm)
1903 {
1904         return call_int_hook(key_permission, 0, key_ref, cred, perm);
1905 }
1906
1907 int security_key_getsecurity(struct key *key, char **_buffer)
1908 {
1909         *_buffer = NULL;
1910         return call_int_hook(key_getsecurity, 0, key, _buffer);
1911 }
1912
1913 #endif  /* CONFIG_KEYS */
1914
1915 #ifdef CONFIG_AUDIT
1916
1917 int security_audit_rule_init(u32 field, u32 op, char *rulestr, void **lsmrule)
1918 {
1919         return call_int_hook(audit_rule_init, 0, field, op, rulestr, lsmrule);
1920 }
1921
1922 int security_audit_rule_known(struct audit_krule *krule)
1923 {
1924         return call_int_hook(audit_rule_known, 0, krule);
1925 }
1926
1927 void security_audit_rule_free(void *lsmrule)
1928 {
1929         call_void_hook(audit_rule_free, lsmrule);
1930 }
1931
1932 int security_audit_rule_match(u32 secid, u32 field, u32 op, void *lsmrule,
1933                               struct audit_context *actx)
1934 {
1935         return call_int_hook(audit_rule_match, 0, secid, field, op, lsmrule,
1936                                 actx);
1937 }
1938 #endif /* CONFIG_AUDIT */
1939
1940 #ifdef CONFIG_BPF_SYSCALL
1941 int security_bpf(int cmd, union bpf_attr *attr, unsigned int size)
1942 {
1943         return call_int_hook(bpf, 0, cmd, attr, size);
1944 }
1945 int security_bpf_map(struct bpf_map *map, fmode_t fmode)
1946 {
1947         return call_int_hook(bpf_map, 0, map, fmode);
1948 }
1949 int security_bpf_prog(struct bpf_prog *prog)
1950 {
1951         return call_int_hook(bpf_prog, 0, prog);
1952 }
1953 int security_bpf_map_alloc(struct bpf_map *map)
1954 {
1955         return call_int_hook(bpf_map_alloc_security, 0, map);
1956 }
1957 int security_bpf_prog_alloc(struct bpf_prog_aux *aux)
1958 {
1959         return call_int_hook(bpf_prog_alloc_security, 0, aux);
1960 }
1961 void security_bpf_map_free(struct bpf_map *map)
1962 {
1963         call_void_hook(bpf_map_free_security, map);
1964 }
1965 void security_bpf_prog_free(struct bpf_prog_aux *aux)
1966 {
1967         call_void_hook(bpf_prog_free_security, aux);
1968 }
1969 #endif /* CONFIG_BPF_SYSCALL */