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