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 #include <linux/bpf.h>
  16 #include <linux/capability.h>
  17 #include <linux/dcache.h>
  18 #include <linux/module.h>
  19 #include <linux/init.h>
  20 #include <linux/kernel.h>
  21 #include <linux/lsm_hooks.h>
  22 #include <linux/integrity.h>
  23 #include <linux/ima.h>
  24 #include <linux/evm.h>
  25 #include <linux/fsnotify.h>
  26 #include <linux/mman.h>
  27 #include <linux/mount.h>
  28 #include <linux/personality.h>
  29 #include <linux/backing-dev.h>
  30 #include <linux/string.h>
  31 #include <net/flow.h>
  32
  33 #include <trace/events/initcall.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 void __init do_security_initcalls(void)
  49 {
  50         int ret;
  51         initcall_t call;
  52         initcall_entry_t *ce;
  53
  54         ce = __security_initcall_start;
  55         trace_initcall_level("security");
  56         while (ce < __security_initcall_end) {
  57                 call = initcall_from_entry(ce);
  58                 trace_initcall_start(call);
  59                 ret = call();
  60                 trace_initcall_finish(call, ret);
  61                 ce++;
  62         }
  63 }
  64
  65 /**
  66  * security_init - initializes the security framework
  67  *
  68  * This should be called early in the kernel initialization sequence.
  69  */
  70 int __init security_init(void)
  71 {
  72         int i;
  73         struct hlist_head *list = (struct hlist_head *) &security_hook_heads;
  74
  75         for (i = 0; i < sizeof(security_hook_heads) / sizeof(struct hlist_head);
  76              i++)
  77                 INIT_HLIST_HEAD(&list[i]);
  78         pr_info("Security Framework initialized\n");
  79
  80         /*
  81          * Load minor LSMs, with the capability module always first.
  82          */
  83         capability_add_hooks();
  84         yama_add_hooks();
  85         loadpin_add_hooks();
  86
  87         /*
  88          * Load all the remaining security modules.
  89          */
  90         do_security_initcalls();
  91
  92         return 0;
  93 }
  94
  95 /* Save user chosen LSM */
  96 static int __init choose_lsm(char *str)
  97 {
  98         strncpy(chosen_lsm, str, SECURITY_NAME_MAX);
  99         return 1;
 100 }
 101 __setup("security=", choose_lsm);
 102
 103 static bool match_last_lsm(const char *list, const char *lsm)
 104 {
 105         const char *last;
 106
 107         if (WARN_ON(!list || !lsm))
 108                 return false;
 109         last = strrchr(list, ',');
 110         if (last)
 111                 /* Pass the comma, strcmp() will check for '\0' */
 112                 last++;
 113         else
 114                 last = list;
 115         return !strcmp(last, lsm);
 116 }
 117
 118 static int lsm_append(char *new, char **result)
 119 {
 120         char *cp;
 121
 122         if (*result == NULL) {
 123                 *result = kstrdup(new, GFP_KERNEL);
 124                 if (*result == NULL)
 125                         return -ENOMEM;
 126         } else {
 127                 /* Check if it is the last registered name */
 128                 if (match_last_lsm(*result, new))
 129                         return 0;
 130                 cp = kasprintf(GFP_KERNEL, "%s,%s", *result, new);
 131                 if (cp == NULL)
 132                         return -ENOMEM;
 133                 kfree(*result);
 134                 *result = cp;
 135         }
 136         return 0;
 137 }
 138
 139 /**
 140  * security_module_enable - Load given security module on boot ?
 141  * @module: the name of the module
 142  *
 143  * Each LSM must pass this method before registering its own operations
 144  * to avoid security registration races. This method may also be used
 145  * to check if your LSM is currently loaded during kernel initialization.
 146  *
 147  * Returns:
 148  *
 149  * true if:
 150  *
 151  * - The passed LSM is the one chosen by user at boot time,
 152  * - or the passed LSM is configured as the default and the user did not
 153  *   choose an alternate LSM at boot time.
 154  *
 155  * Otherwise, return false.
 156  */
 157 int __init security_module_enable(const char *module)
 158 {
 159         return !strcmp(module, chosen_lsm);
 160 }
 161
 162 /**
 163  * security_add_hooks - Add a modules hooks to the hook lists.
 164  * @hooks: the hooks to add
 165  * @count: the number of hooks to add
 166  * @lsm: the name of the security module
 167  *
 168  * Each LSM has to register its hooks with the infrastructure.
 169  */
 170 void __init security_add_hooks(struct security_hook_list *hooks, int count,
 171                                 char *lsm)
 172 {
 173         int i;
 174
 175         for (i = 0; i < count; i++) {
 176                 hooks[i].lsm = lsm;
 177                 hlist_add_tail_rcu(&hooks[i].list, hooks[i].head);
 178         }
 179         if (lsm_append(lsm, &lsm_names) < 0)
 180                 panic("%s - Cannot get early memory.\n", __func__);
 181 }
 182
 183 int call_lsm_notifier(enum lsm_event event, void *data)
 184 {
 185         return atomic_notifier_call_chain(&lsm_notifier_chain, event, data);
 186 }
 187 EXPORT_SYMBOL(call_lsm_notifier);
 188
 189 int register_lsm_notifier(struct notifier_block *nb)
 190 {
 191         return atomic_notifier_chain_register(&lsm_notifier_chain, nb);
 192 }
 193 EXPORT_SYMBOL(register_lsm_notifier);
 194
 195 int unregister_lsm_notifier(struct notifier_block *nb)
 196 {
 197         return atomic_notifier_chain_unregister(&lsm_notifier_chain, nb);
 198 }
 199 EXPORT_SYMBOL(unregister_lsm_notifier);
 200
 201 /*
 202  * Hook list operation macros.
 203  *
 204  * call_void_hook:
 205  *      This is a hook that does not return a value.
 206  *
 207  * call_int_hook:
 208  *      This is a hook that returns a value.
 209  */
 210
 211 #define call_void_hook(FUNC, ...)                               \
 212         do {                                                    \
 213                 struct security_hook_list *P;                   \
 214                                                                 \
 215                 hlist_for_each_entry(P, &security_hook_heads.FUNC, list) \
 216                         P->hook.FUNC(__VA_ARGS__);              \
 217         } while (0)
 218
 219 #define call_int_hook(FUNC, IRC, ...) ({                        \
 220         int RC = IRC;                                           \
 221         do {                                                    \
 222                 struct security_hook_list *P;                   \
 223                                                                 \
 224                 hlist_for_each_entry(P, &security_hook_heads.FUNC, list) { \
 225                         RC = P->hook.FUNC(__VA_ARGS__);         \
 226                         if (RC != 0)                            \
 227                                 break;                          \
 228                 }                                               \
 229         } while (0);                                            \
 230         RC;                                                     \
 231 })
 232
 233 /* Security operations */
 234
 235 int security_binder_set_context_mgr(struct task_struct *mgr)
 236 {
 237         return call_int_hook(binder_set_context_mgr, 0, mgr);
 238 }
 239
 240 int security_binder_transaction(struct task_struct *from,
 241                                 struct task_struct *to)
 242 {
 243         return call_int_hook(binder_transaction, 0, from, to);
 244 }
 245
 246 int security_binder_transfer_binder(struct task_struct *from,
 247                                     struct task_struct *to)
 248 {
 249         return call_int_hook(binder_transfer_binder, 0, from, to);
 250 }
 251
 252 int security_binder_transfer_file(struct task_struct *from,
 253                                   struct task_struct *to, struct file *file)
 254 {
 255         return call_int_hook(binder_transfer_file, 0, from, to, file);
 256 }
 257
 258 int security_ptrace_access_check(struct task_struct *child, unsigned int mode)
 259 {
 260         return call_int_hook(ptrace_access_check, 0, child, mode);
 261 }
 262
 263 int security_ptrace_traceme(struct task_struct *parent)
 264 {
 265         return call_int_hook(ptrace_traceme, 0, parent);
 266 }
 267
 268 int security_capget(struct task_struct *target,
 269                      kernel_cap_t *effective,
 270                      kernel_cap_t *inheritable,
 271                      kernel_cap_t *permitted)
 272 {
 273         return call_int_hook(capget, 0, target,
 274                                 effective, inheritable, permitted);
 275 }
 276
 277 int security_capset(struct cred *new, const struct cred *old,
 278                     const kernel_cap_t *effective,
 279                     const kernel_cap_t *inheritable,
 280                     const kernel_cap_t *permitted)
 281 {
 282         return call_int_hook(capset, 0, new, old,
 283                                 effective, inheritable, permitted);
 284 }
 285
 286 int security_capable(const struct cred *cred, struct user_namespace *ns,
 287                      int cap)
 288 {
 289         return call_int_hook(capable, 0, cred, ns, cap, SECURITY_CAP_AUDIT);
 290 }
 291
 292 int security_capable_noaudit(const struct cred *cred, struct user_namespace *ns,
 293                              int cap)
 294 {
 295         return call_int_hook(capable, 0, cred, ns, cap, SECURITY_CAP_NOAUDIT);
 296 }
 297
 298 int security_quotactl(int cmds, int type, int id, struct super_block *sb)
 299 {
 300         return call_int_hook(quotactl, 0, cmds, type, id, sb);
 301 }
 302
 303 int security_quota_on(struct dentry *dentry)
 304 {
 305         return call_int_hook(quota_on, 0, dentry);
 306 }
 307
 308 int security_syslog(int type)
 309 {
 310         return call_int_hook(syslog, 0, type);
 311 }
 312
 313 int security_settime64(const struct timespec64 *ts, const struct timezone *tz)
 314 {
 315         return call_int_hook(settime, 0, ts, tz);
 316 }
 317
 318 int security_vm_enough_memory_mm(struct mm_struct *mm, long pages)
 319 {
 320         struct security_hook_list *hp;
 321         int cap_sys_admin = 1;
 322         int rc;
 323
 324         /*
 325          * The module will respond with a positive value if
 326          * it thinks the __vm_enough_memory() call should be
 327          * made with the cap_sys_admin set. If all of the modules
 328          * agree that it should be set it will. If any module
 329          * thinks it should not be set it won't.
 330          */
 331         hlist_for_each_entry(hp, &security_hook_heads.vm_enough_memory, list) {
 332                 rc = hp->hook.vm_enough_memory(mm, pages);
 333                 if (rc <= 0) {
 334                         cap_sys_admin = 0;
 335                         break;
 336                 }
 337         }
 338         return __vm_enough_memory(mm, pages, cap_sys_admin);
 339 }
 340
 341 int security_bprm_set_creds(struct linux_binprm *bprm)
 342 {
 343         return call_int_hook(bprm_set_creds, 0, bprm);
 344 }
 345
 346 int security_bprm_check(struct linux_binprm *bprm)
 347 {
 348         int ret;
 349
 350         ret = call_int_hook(bprm_check_security, 0, bprm);
 351         if (ret)
 352                 return ret;
 353         return ima_bprm_check(bprm);
 354 }
 355
 356 void security_bprm_committing_creds(struct linux_binprm *bprm)
 357 {
 358         call_void_hook(bprm_committing_creds, bprm);
 359 }
 360
 361 void security_bprm_committed_creds(struct linux_binprm *bprm)
 362 {
 363         call_void_hook(bprm_committed_creds, bprm);
 364 }
 365
 366 int security_sb_alloc(struct super_block *sb)
 367 {
 368         return call_int_hook(sb_alloc_security, 0, sb);
 369 }
 370
 371 void security_sb_free(struct super_block *sb)
 372 {
 373         call_void_hook(sb_free_security, sb);
 374 }
 375
 376 int security_sb_copy_data(char *orig, char *copy)
 377 {
 378         return call_int_hook(sb_copy_data, 0, orig, copy);
 379 }
 380 EXPORT_SYMBOL(security_sb_copy_data);
 381
 382 int security_sb_remount(struct super_block *sb, void *data)
 383 {
 384         return call_int_hook(sb_remount, 0, sb, data);
 385 }
 386
 387 int security_sb_kern_mount(struct super_block *sb, int flags, void *data)
 388 {
 389         return call_int_hook(sb_kern_mount, 0, sb, flags, data);
 390 }
 391
 392 int security_sb_show_options(struct seq_file *m, struct super_block *sb)
 393 {
 394         return call_int_hook(sb_show_options, 0, m, sb);
 395 }
 396
 397 int security_sb_statfs(struct dentry *dentry)
 398 {
 399         return call_int_hook(sb_statfs, 0, dentry);
 400 }
 401
 402 int security_sb_mount(const char *dev_name, const struct path *path,
 403                        const char *type, unsigned long flags, void *data)
 404 {
 405         return call_int_hook(sb_mount, 0, dev_name, path, type, flags, data);
 406 }
 407
 408 int security_sb_umount(struct vfsmount *mnt, int flags)
 409 {
 410         return call_int_hook(sb_umount, 0, mnt, flags);
 411 }
 412
 413 int security_sb_pivotroot(const struct path *old_path, const struct path *new_path)
 414 {
 415         return call_int_hook(sb_pivotroot, 0, old_path, new_path);
 416 }
 417
 418 int security_sb_set_mnt_opts(struct super_block *sb,
 419                                 struct security_mnt_opts *opts,
 420                                 unsigned long kern_flags,
 421                                 unsigned long *set_kern_flags)
 422 {
 423         return call_int_hook(sb_set_mnt_opts,
 424                                 opts->num_mnt_opts ? -EOPNOTSUPP : 0, sb,
 425                                 opts, kern_flags, set_kern_flags);
 426 }
 427 EXPORT_SYMBOL(security_sb_set_mnt_opts);
 428
 429 int security_sb_clone_mnt_opts(const struct super_block *oldsb,
 430                                 struct super_block *newsb,
 431                                 unsigned long kern_flags,
 432                                 unsigned long *set_kern_flags)
 433 {
 434         return call_int_hook(sb_clone_mnt_opts, 0, oldsb, newsb,
 435                                 kern_flags, set_kern_flags);
 436 }
 437 EXPORT_SYMBOL(security_sb_clone_mnt_opts);
 438
 439 int security_sb_parse_opts_str(char *options, struct security_mnt_opts *opts)
 440 {
 441         return call_int_hook(sb_parse_opts_str, 0, options, opts);
 442 }
 443 EXPORT_SYMBOL(security_sb_parse_opts_str);
 444
 445 int security_inode_alloc(struct inode *inode)
 446 {
 447         inode->i_security = NULL;
 448         return call_int_hook(inode_alloc_security, 0, inode);
 449 }
 450
 451 void security_inode_free(struct inode *inode)
 452 {
 453         integrity_inode_free(inode);
 454         call_void_hook(inode_free_security, inode);
 455 }
 456
 457 int security_dentry_init_security(struct dentry *dentry, int mode,
 458                                         const struct qstr *name, void **ctx,
 459                                         u32 *ctxlen)
 460 {
 461         return call_int_hook(dentry_init_security, -EOPNOTSUPP, dentry, mode,
 462                                 name, ctx, ctxlen);
 463 }
 464 EXPORT_SYMBOL(security_dentry_init_security);
 465
 466 int security_dentry_create_files_as(struct dentry *dentry, int mode,
 467                                     struct qstr *name,
 468                                     const struct cred *old, struct cred *new)
 469 {
 470         return call_int_hook(dentry_create_files_as, 0, dentry, mode,
 471                                 name, old, new);
 472 }
 473 EXPORT_SYMBOL(security_dentry_create_files_as);
 474
 475 int security_inode_init_security(struct inode *inode, struct inode *dir,
 476                                  const struct qstr *qstr,
 477                                  const initxattrs initxattrs, void *fs_data)
 478 {
 479         struct xattr new_xattrs[MAX_LSM_EVM_XATTR + 1];
 480         struct xattr *lsm_xattr, *evm_xattr, *xattr;
 481         int ret;
 482
 483         if (unlikely(IS_PRIVATE(inode)))
 484                 return 0;
 485
 486         if (!initxattrs)
 487                 return call_int_hook(inode_init_security, -EOPNOTSUPP, inode,
 488                                      dir, qstr, NULL, NULL, NULL);
 489         memset(new_xattrs, 0, sizeof(new_xattrs));
 490         lsm_xattr = new_xattrs;
 491         ret = call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir, qstr,
 492                                                 &lsm_xattr->name,
 493                                                 &lsm_xattr->value,
 494                                                 &lsm_xattr->value_len);
 495         if (ret)
 496                 goto out;
 497
 498         evm_xattr = lsm_xattr + 1;
 499         ret = evm_inode_init_security(inode, lsm_xattr, evm_xattr);
 500         if (ret)
 501                 goto out;
 502         ret = initxattrs(inode, new_xattrs, fs_data);
 503 out:
 504         for (xattr = new_xattrs; xattr->value != NULL; xattr++)
 505                 kfree(xattr->value);
 506         return (ret == -EOPNOTSUPP) ? 0 : ret;
 507 }
 508 EXPORT_SYMBOL(security_inode_init_security);
 509
 510 int security_old_inode_init_security(struct inode *inode, struct inode *dir,
 511                                      const struct qstr *qstr, const char **name,
 512                                      void **value, size_t *len)
 513 {
 514         if (unlikely(IS_PRIVATE(inode)))
 515                 return -EOPNOTSUPP;
 516         return call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir,
 517                              qstr, name, value, len);
 518 }
 519 EXPORT_SYMBOL(security_old_inode_init_security);
 520
 521 #ifdef CONFIG_SECURITY_PATH
 522 int security_path_mknod(const struct path *dir, struct dentry *dentry, umode_t mode,
 523                         unsigned int dev)
 524 {
 525         if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
 526                 return 0;
 527         return call_int_hook(path_mknod, 0, dir, dentry, mode, dev);
 528 }
 529 EXPORT_SYMBOL(security_path_mknod);
 530
 531 int security_path_mkdir(const struct path *dir, struct dentry *dentry, umode_t mode)
 532 {
 533         if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
 534                 return 0;
 535         return call_int_hook(path_mkdir, 0, dir, dentry, mode);
 536 }
 537 EXPORT_SYMBOL(security_path_mkdir);
 538
 539 int security_path_rmdir(const struct path *dir, struct dentry *dentry)
 540 {
 541         if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
 542                 return 0;
 543         return call_int_hook(path_rmdir, 0, dir, dentry);
 544 }
 545
 546 int security_path_unlink(const struct path *dir, struct dentry *dentry)
 547 {
 548         if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
 549                 return 0;
 550         return call_int_hook(path_unlink, 0, dir, dentry);
 551 }
 552 EXPORT_SYMBOL(security_path_unlink);
 553
 554 int security_path_symlink(const struct path *dir, struct dentry *dentry,
 555                           const char *old_name)
 556 {
 557         if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
 558                 return 0;
 559         return call_int_hook(path_symlink, 0, dir, dentry, old_name);
 560 }
 561
 562 int security_path_link(struct dentry *old_dentry, const struct path *new_dir,
 563                        struct dentry *new_dentry)
 564 {
 565         if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry))))
 566                 return 0;
 567         return call_int_hook(path_link, 0, old_dentry, new_dir, new_dentry);
 568 }
 569
 570 int security_path_rename(const struct path *old_dir, struct dentry *old_dentry,
 571                          const struct path *new_dir, struct dentry *new_dentry,
 572                          unsigned int flags)
 573 {
 574         if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) ||
 575                      (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry)))))
 576                 return 0;
 577
 578         if (flags & RENAME_EXCHANGE) {
 579                 int err = call_int_hook(path_rename, 0, new_dir, new_dentry,
 580                                         old_dir, old_dentry);
 581                 if (err)
 582                         return err;
 583         }
 584
 585         return call_int_hook(path_rename, 0, old_dir, old_dentry, new_dir,
 586                                 new_dentry);
 587 }
 588 EXPORT_SYMBOL(security_path_rename);
 589
 590 int security_path_truncate(const struct path *path)
 591 {
 592         if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
 593                 return 0;
 594         return call_int_hook(path_truncate, 0, path);
 595 }
 596
 597 int security_path_chmod(const struct path *path, umode_t mode)
 598 {
 599         if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
 600                 return 0;
 601         return call_int_hook(path_chmod, 0, path, mode);
 602 }
 603
 604 int security_path_chown(const struct path *path, kuid_t uid, kgid_t gid)
 605 {
 606         if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
 607                 return 0;
 608         return call_int_hook(path_chown, 0, path, uid, gid);
 609 }
 610
 611 int security_path_chroot(const struct path *path)
 612 {
 613         return call_int_hook(path_chroot, 0, path);
 614 }
 615 #endif
 616
 617 int security_inode_create(struct inode *dir, struct dentry *dentry, umode_t mode)
 618 {
 619         if (unlikely(IS_PRIVATE(dir)))
 620                 return 0;
 621         return call_int_hook(inode_create, 0, dir, dentry, mode);
 622 }
 623 EXPORT_SYMBOL_GPL(security_inode_create);
 624
 625 int security_inode_link(struct dentry *old_dentry, struct inode *dir,
 626                          struct dentry *new_dentry)
 627 {
 628         if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry))))
 629                 return 0;
 630         return call_int_hook(inode_link, 0, old_dentry, dir, new_dentry);
 631 }
 632
 633 int security_inode_unlink(struct inode *dir, struct dentry *dentry)
 634 {
 635         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
 636                 return 0;
 637         return call_int_hook(inode_unlink, 0, dir, dentry);
 638 }
 639
 640 int security_inode_symlink(struct inode *dir, struct dentry *dentry,
 641                             const char *old_name)
 642 {
 643         if (unlikely(IS_PRIVATE(dir)))
 644                 return 0;
 645         return call_int_hook(inode_symlink, 0, dir, dentry, old_name);
 646 }
 647
 648 int security_inode_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
 649 {
 650         if (unlikely(IS_PRIVATE(dir)))
 651                 return 0;
 652         return call_int_hook(inode_mkdir, 0, dir, dentry, mode);
 653 }
 654 EXPORT_SYMBOL_GPL(security_inode_mkdir);
 655
 656 int security_inode_rmdir(struct inode *dir, struct dentry *dentry)
 657 {
 658         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
 659                 return 0;
 660         return call_int_hook(inode_rmdir, 0, dir, dentry);
 661 }
 662
 663 int security_inode_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t dev)
 664 {
 665         if (unlikely(IS_PRIVATE(dir)))
 666                 return 0;
 667         return call_int_hook(inode_mknod, 0, dir, dentry, mode, dev);
 668 }
 669
 670 int security_inode_rename(struct inode *old_dir, struct dentry *old_dentry,
 671                            struct inode *new_dir, struct dentry *new_dentry,
 672                            unsigned int flags)
 673 {
 674         if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) ||
 675             (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry)))))
 676                 return 0;
 677
 678         if (flags & RENAME_EXCHANGE) {
 679                 int err = call_int_hook(inode_rename, 0, new_dir, new_dentry,
 680                                                      old_dir, old_dentry);
 681                 if (err)
 682                         return err;
 683         }
 684
 685         return call_int_hook(inode_rename, 0, old_dir, old_dentry,
 686                                            new_dir, new_dentry);
 687 }
 688
 689 int security_inode_readlink(struct dentry *dentry)
 690 {
 691         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
 692                 return 0;
 693         return call_int_hook(inode_readlink, 0, dentry);
 694 }
 695
 696 int security_inode_follow_link(struct dentry *dentry, struct inode *inode,
 697                                bool rcu)
 698 {
 699         if (unlikely(IS_PRIVATE(inode)))
 700                 return 0;
 701         return call_int_hook(inode_follow_link, 0, dentry, inode, rcu);
 702 }
 703
 704 int security_inode_permission(struct inode *inode, int mask)
 705 {
 706         if (unlikely(IS_PRIVATE(inode)))
 707                 return 0;
 708         return call_int_hook(inode_permission, 0, inode, mask);
 709 }
 710
 711 int security_inode_setattr(struct dentry *dentry, struct iattr *attr)
 712 {
 713         int ret;
 714
 715         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
 716                 return 0;
 717         ret = call_int_hook(inode_setattr, 0, dentry, attr);
 718         if (ret)
 719                 return ret;
 720         return evm_inode_setattr(dentry, attr);
 721 }
 722 EXPORT_SYMBOL_GPL(security_inode_setattr);
 723
 724 int security_inode_getattr(const struct path *path)
 725 {
 726         if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
 727                 return 0;
 728         return call_int_hook(inode_getattr, 0, path);
 729 }
 730
 731 int security_inode_setxattr(struct dentry *dentry, const char *name,
 732                             const void *value, size_t size, int flags)
 733 {
 734         int ret;
 735
 736         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
 737                 return 0;
 738         /*
 739          * SELinux and Smack integrate the cap call,
 740          * so assume that all LSMs supplying this call do so.
 741          */
 742         ret = call_int_hook(inode_setxattr, 1, dentry, name, value, size,
 743                                 flags);
 744
 745         if (ret == 1)
 746                 ret = cap_inode_setxattr(dentry, name, value, size, flags);
 747         if (ret)
 748                 return ret;
 749         ret = ima_inode_setxattr(dentry, name, value, size);
 750         if (ret)
 751                 return ret;
 752         return evm_inode_setxattr(dentry, name, value, size);
 753 }
 754
 755 void security_inode_post_setxattr(struct dentry *dentry, const char *name,
 756                                   const void *value, size_t size, int flags)
 757 {
 758         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
 759                 return;
 760         call_void_hook(inode_post_setxattr, dentry, name, value, size, flags);
 761         evm_inode_post_setxattr(dentry, name, value, size);
 762 }
 763
 764 int security_inode_getxattr(struct dentry *dentry, const char *name)
 765 {
 766         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
 767                 return 0;
 768         return call_int_hook(inode_getxattr, 0, dentry, name);
 769 }
 770
 771 int security_inode_listxattr(struct dentry *dentry)
 772 {
 773         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
 774                 return 0;
 775         return call_int_hook(inode_listxattr, 0, dentry);
 776 }
 777
 778 int security_inode_removexattr(struct dentry *dentry, const char *name)
 779 {
 780         int ret;
 781
 782         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
 783                 return 0;
 784         /*
 785          * SELinux and Smack integrate the cap call,
 786          * so assume that all LSMs supplying this call do so.
 787          */
 788         ret = call_int_hook(inode_removexattr, 1, dentry, name);
 789         if (ret == 1)
 790                 ret = cap_inode_removexattr(dentry, name);
 791         if (ret)
 792                 return ret;
 793         ret = ima_inode_removexattr(dentry, name);
 794         if (ret)
 795                 return ret;
 796         return evm_inode_removexattr(dentry, name);
 797 }
 798
 799 int security_inode_need_killpriv(struct dentry *dentry)
 800 {
 801         return call_int_hook(inode_need_killpriv, 0, dentry);
 802 }
 803
 804 int security_inode_killpriv(struct dentry *dentry)
 805 {
 806         return call_int_hook(inode_killpriv, 0, dentry);
 807 }
 808
 809 int security_inode_getsecurity(struct inode *inode, const char *name, void **buffer, bool alloc)
 810 {
 811         struct security_hook_list *hp;
 812         int rc;
 813
 814         if (unlikely(IS_PRIVATE(inode)))
 815                 return -EOPNOTSUPP;
 816         /*
 817          * Only one module will provide an attribute with a given name.
 818          */
 819         hlist_for_each_entry(hp, &security_hook_heads.inode_getsecurity, list) {
 820                 rc = hp->hook.inode_getsecurity(inode, name, buffer, alloc);
 821                 if (rc != -EOPNOTSUPP)
 822                         return rc;
 823         }
 824         return -EOPNOTSUPP;
 825 }
 826
 827 int security_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags)
 828 {
 829         struct security_hook_list *hp;
 830         int rc;
 831
 832         if (unlikely(IS_PRIVATE(inode)))
 833                 return -EOPNOTSUPP;
 834         /*
 835          * Only one module will provide an attribute with a given name.
 836          */
 837         hlist_for_each_entry(hp, &security_hook_heads.inode_setsecurity, list) {
 838                 rc = hp->hook.inode_setsecurity(inode, name, value, size,
 839                                                                 flags);
 840                 if (rc != -EOPNOTSUPP)
 841                         return rc;
 842         }
 843         return -EOPNOTSUPP;
 844 }
 845
 846 int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size)
 847 {
 848         if (unlikely(IS_PRIVATE(inode)))
 849                 return 0;
 850         return call_int_hook(inode_listsecurity, 0, inode, buffer, buffer_size);
 851 }
 852 EXPORT_SYMBOL(security_inode_listsecurity);
 853
 854 void security_inode_getsecid(struct inode *inode, u32 *secid)
 855 {
 856         call_void_hook(inode_getsecid, inode, secid);
 857 }
 858
 859 int security_inode_copy_up(struct dentry *src, struct cred **new)
 860 {
 861         return call_int_hook(inode_copy_up, 0, src, new);
 862 }
 863 EXPORT_SYMBOL(security_inode_copy_up);
 864
 865 int security_inode_copy_up_xattr(const char *name)
 866 {
 867         return call_int_hook(inode_copy_up_xattr, -EOPNOTSUPP, name);
 868 }
 869 EXPORT_SYMBOL(security_inode_copy_up_xattr);
 870
 871 int security_file_permission(struct file *file, int mask)
 872 {
 873         int ret;
 874
 875         ret = call_int_hook(file_permission, 0, file, mask);
 876         if (ret)
 877                 return ret;
 878
 879         return fsnotify_perm(file, mask);
 880 }
 881
 882 int security_file_alloc(struct file *file)
 883 {
 884         return call_int_hook(file_alloc_security, 0, file);
 885 }
 886
 887 void security_file_free(struct file *file)
 888 {
 889         call_void_hook(file_free_security, file);
 890 }
 891
 892 int security_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 893 {
 894         return call_int_hook(file_ioctl, 0, file, cmd, arg);
 895 }
 896
 897 static inline unsigned long mmap_prot(struct file *file, unsigned long prot)
 898 {
 899         /*
 900          * Does we have PROT_READ and does the application expect
 901          * it to imply PROT_EXEC?  If not, nothing to talk about...
 902          */
 903         if ((prot & (PROT_READ | PROT_EXEC)) != PROT_READ)
 904                 return prot;
 905         if (!(current->personality & READ_IMPLIES_EXEC))
 906                 return prot;
 907         /*
 908          * if that's an anonymous mapping, let it.
 909          */
 910         if (!file)
 911                 return prot | PROT_EXEC;
 912         /*
 913          * ditto if it's not on noexec mount, except that on !MMU we need
 914          * NOMMU_MAP_EXEC (== VM_MAYEXEC) in this case
 915          */
 916         if (!path_noexec(&file->f_path)) {
 917 #ifndef CONFIG_MMU
 918                 if (file->f_op->mmap_capabilities) {
 919                         unsigned caps = file->f_op->mmap_capabilities(file);
 920                         if (!(caps & NOMMU_MAP_EXEC))
 921                                 return prot;
 922                 }
 923 #endif
 924                 return prot | PROT_EXEC;
 925         }
 926         /* anything on noexec mount won't get PROT_EXEC */
 927         return prot;
 928 }
 929
 930 int security_mmap_file(struct file *file, unsigned long prot,
 931                         unsigned long flags)
 932 {
 933         int ret;
 934         ret = call_int_hook(mmap_file, 0, file, prot,
 935                                         mmap_prot(file, prot), flags);
 936         if (ret)
 937                 return ret;
 938         return ima_file_mmap(file, prot);
 939 }
 940
 941 int security_mmap_addr(unsigned long addr)
 942 {
 943         return call_int_hook(mmap_addr, 0, addr);
 944 }
 945
 946 int security_file_mprotect(struct vm_area_struct *vma, unsigned long reqprot,
 947                             unsigned long prot)
 948 {
 949         return call_int_hook(file_mprotect, 0, vma, reqprot, prot);
 950 }
 951
 952 int security_file_lock(struct file *file, unsigned int cmd)
 953 {
 954         return call_int_hook(file_lock, 0, file, cmd);
 955 }
 956
 957 int security_file_fcntl(struct file *file, unsigned int cmd, unsigned long arg)
 958 {
 959         return call_int_hook(file_fcntl, 0, file, cmd, arg);
 960 }
 961
 962 void security_file_set_fowner(struct file *file)
 963 {
 964         call_void_hook(file_set_fowner, file);
 965 }
 966
 967 int security_file_send_sigiotask(struct task_struct *tsk,
 968                                   struct fown_struct *fown, int sig)
 969 {
 970         return call_int_hook(file_send_sigiotask, 0, tsk, fown, sig);
 971 }
 972
 973 int security_file_receive(struct file *file)
 974 {
 975         return call_int_hook(file_receive, 0, file);
 976 }
 977
 978 int security_file_open(struct file *file)
 979 {
 980         int ret;
 981
 982         ret = call_int_hook(file_open, 0, file);
 983         if (ret)
 984                 return ret;
 985
 986         return fsnotify_perm(file, MAY_OPEN);
 987 }
 988
 989 int security_task_alloc(struct task_struct *task, unsigned long clone_flags)
 990 {
 991         return call_int_hook(task_alloc, 0, task, clone_flags);
 992 }
 993
 994 void security_task_free(struct task_struct *task)
 995 {
 996         call_void_hook(task_free, task);
 997 }
 998
 999 int security_cred_alloc_blank(struct cred *cred, gfp_t gfp)
1000 {
1001         return call_int_hook(cred_alloc_blank, 0, cred, gfp);
1002 }
1003
1004 void security_cred_free(struct cred *cred)
1005 {
1006         call_void_hook(cred_free, cred);
1007 }
1008
1009 int security_prepare_creds(struct cred *new, const struct cred *old, gfp_t gfp)
1010 {
1011         return call_int_hook(cred_prepare, 0, new, old, gfp);
1012 }
1013
1014 void security_transfer_creds(struct cred *new, const struct cred *old)
1015 {
1016         call_void_hook(cred_transfer, new, old);
1017 }
1018
1019 void security_cred_getsecid(const struct cred *c, u32 *secid)
1020 {
1021         *secid = 0;
1022         call_void_hook(cred_getsecid, c, secid);
1023 }
1024 EXPORT_SYMBOL(security_cred_getsecid);
1025
1026 int security_kernel_act_as(struct cred *new, u32 secid)
1027 {
1028         return call_int_hook(kernel_act_as, 0, new, secid);
1029 }
1030
1031 int security_kernel_create_files_as(struct cred *new, struct inode *inode)
1032 {
1033         return call_int_hook(kernel_create_files_as, 0, new, inode);
1034 }
1035
1036 int security_kernel_module_request(char *kmod_name)
1037 {
1038         int ret;
1039
1040         ret = call_int_hook(kernel_module_request, 0, kmod_name);
1041         if (ret)
1042                 return ret;
1043         return integrity_kernel_module_request(kmod_name);
1044 }
1045
1046 int security_kernel_read_file(struct file *file, enum kernel_read_file_id id)
1047 {
1048         int ret;
1049
1050         ret = call_int_hook(kernel_read_file, 0, file, id);
1051         if (ret)
1052                 return ret;
1053         return ima_read_file(file, id);
1054 }
1055 EXPORT_SYMBOL_GPL(security_kernel_read_file);
1056
1057 int security_kernel_post_read_file(struct file *file, char *buf, loff_t size,
1058                                    enum kernel_read_file_id id)
1059 {
1060         int ret;
1061
1062         ret = call_int_hook(kernel_post_read_file, 0, file, buf, size, id);
1063         if (ret)
1064                 return ret;
1065         return ima_post_read_file(file, buf, size, id);
1066 }
1067 EXPORT_SYMBOL_GPL(security_kernel_post_read_file);
1068
1069 int security_kernel_load_data(enum kernel_load_data_id id)
1070 {
1071         int ret;
1072
1073         ret = call_int_hook(kernel_load_data, 0, id);
1074         if (ret)
1075                 return ret;
1076         return ima_load_data(id);
1077 }
1078 EXPORT_SYMBOL_GPL(security_kernel_load_data);
1079
1080 int security_task_fix_setuid(struct cred *new, const struct cred *old,
1081                              int flags)
1082 {
1083         return call_int_hook(task_fix_setuid, 0, new, old, flags);
1084 }
1085
1086 int security_task_setpgid(struct task_struct *p, pid_t pgid)
1087 {
1088         return call_int_hook(task_setpgid, 0, p, pgid);
1089 }
1090
1091 int security_task_getpgid(struct task_struct *p)
1092 {
1093         return call_int_hook(task_getpgid, 0, p);
1094 }
1095
1096 int security_task_getsid(struct task_struct *p)
1097 {
1098         return call_int_hook(task_getsid, 0, p);
1099 }
1100
1101 void security_task_getsecid(struct task_struct *p, u32 *secid)
1102 {
1103         *secid = 0;
1104         call_void_hook(task_getsecid, p, secid);
1105 }
1106 EXPORT_SYMBOL(security_task_getsecid);
1107
1108 int security_task_setnice(struct task_struct *p, int nice)
1109 {
1110         return call_int_hook(task_setnice, 0, p, nice);
1111 }
1112
1113 int security_task_setioprio(struct task_struct *p, int ioprio)
1114 {
1115         return call_int_hook(task_setioprio, 0, p, ioprio);
1116 }
1117
1118 int security_task_getioprio(struct task_struct *p)
1119 {
1120         return call_int_hook(task_getioprio, 0, p);
1121 }
1122
1123 int security_task_prlimit(const struct cred *cred, const struct cred *tcred,
1124                           unsigned int flags)
1125 {
1126         return call_int_hook(task_prlimit, 0, cred, tcred, flags);
1127 }
1128
1129 int security_task_setrlimit(struct task_struct *p, unsigned int resource,
1130                 struct rlimit *new_rlim)
1131 {
1132         return call_int_hook(task_setrlimit, 0, p, resource, new_rlim);
1133 }
1134
1135 int security_task_setscheduler(struct task_struct *p)
1136 {
1137         return call_int_hook(task_setscheduler, 0, p);
1138 }
1139
1140 int security_task_getscheduler(struct task_struct *p)
1141 {
1142         return call_int_hook(task_getscheduler, 0, p);
1143 }
1144
1145 int security_task_movememory(struct task_struct *p)
1146 {
1147         return call_int_hook(task_movememory, 0, p);
1148 }
1149
1150 int security_task_kill(struct task_struct *p, struct siginfo *info,
1151                         int sig, const struct cred *cred)
1152 {
1153         return call_int_hook(task_kill, 0, p, info, sig, cred);
1154 }
1155
1156 int security_task_prctl(int option, unsigned long arg2, unsigned long arg3,
1157                          unsigned long arg4, unsigned long arg5)
1158 {
1159         int thisrc;
1160         int rc = -ENOSYS;
1161         struct security_hook_list *hp;
1162
1163         hlist_for_each_entry(hp, &security_hook_heads.task_prctl, list) {
1164                 thisrc = hp->hook.task_prctl(option, arg2, arg3, arg4, arg5);
1165                 if (thisrc != -ENOSYS) {
1166                         rc = thisrc;
1167                         if (thisrc != 0)
1168                                 break;
1169                 }
1170         }
1171         return rc;
1172 }
1173
1174 void security_task_to_inode(struct task_struct *p, struct inode *inode)
1175 {
1176         call_void_hook(task_to_inode, p, inode);
1177 }
1178
1179 int security_ipc_permission(struct kern_ipc_perm *ipcp, short flag)
1180 {
1181         return call_int_hook(ipc_permission, 0, ipcp, flag);
1182 }
1183
1184 void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid)
1185 {
1186         *secid = 0;
1187         call_void_hook(ipc_getsecid, ipcp, secid);
1188 }
1189
1190 int security_msg_msg_alloc(struct msg_msg *msg)
1191 {
1192         return call_int_hook(msg_msg_alloc_security, 0, msg);
1193 }
1194
1195 void security_msg_msg_free(struct msg_msg *msg)
1196 {
1197         call_void_hook(msg_msg_free_security, msg);
1198 }
1199
1200 int security_msg_queue_alloc(struct kern_ipc_perm *msq)
1201 {
1202         return call_int_hook(msg_queue_alloc_security, 0, msq);
1203 }
1204
1205 void security_msg_queue_free(struct kern_ipc_perm *msq)
1206 {
1207         call_void_hook(msg_queue_free_security, msq);
1208 }
1209
1210 int security_msg_queue_associate(struct kern_ipc_perm *msq, int msqflg)
1211 {
1212         return call_int_hook(msg_queue_associate, 0, msq, msqflg);
1213 }
1214
1215 int security_msg_queue_msgctl(struct kern_ipc_perm *msq, int cmd)
1216 {
1217         return call_int_hook(msg_queue_msgctl, 0, msq, cmd);
1218 }
1219
1220 int security_msg_queue_msgsnd(struct kern_ipc_perm *msq,
1221                                struct msg_msg *msg, int msqflg)
1222 {
1223         return call_int_hook(msg_queue_msgsnd, 0, msq, msg, msqflg);
1224 }
1225
1226 int security_msg_queue_msgrcv(struct kern_ipc_perm *msq, struct msg_msg *msg,
1227                                struct task_struct *target, long type, int mode)
1228 {
1229         return call_int_hook(msg_queue_msgrcv, 0, msq, msg, target, type, mode);
1230 }
1231
1232 int security_shm_alloc(struct kern_ipc_perm *shp)
1233 {
1234         return call_int_hook(shm_alloc_security, 0, shp);
1235 }
1236
1237 void security_shm_free(struct kern_ipc_perm *shp)
1238 {
1239         call_void_hook(shm_free_security, shp);
1240 }
1241
1242 int security_shm_associate(struct kern_ipc_perm *shp, int shmflg)
1243 {
1244         return call_int_hook(shm_associate, 0, shp, shmflg);
1245 }
1246
1247 int security_shm_shmctl(struct kern_ipc_perm *shp, int cmd)
1248 {
1249         return call_int_hook(shm_shmctl, 0, shp, cmd);
1250 }
1251
1252 int security_shm_shmat(struct kern_ipc_perm *shp, char __user *shmaddr, int shmflg)
1253 {
1254         return call_int_hook(shm_shmat, 0, shp, shmaddr, shmflg);
1255 }
1256
1257 int security_sem_alloc(struct kern_ipc_perm *sma)
1258 {
1259         return call_int_hook(sem_alloc_security, 0, sma);
1260 }
1261
1262 void security_sem_free(struct kern_ipc_perm *sma)
1263 {
1264         call_void_hook(sem_free_security, sma);
1265 }
1266
1267 int security_sem_associate(struct kern_ipc_perm *sma, int semflg)
1268 {
1269         return call_int_hook(sem_associate, 0, sma, semflg);
1270 }
1271
1272 int security_sem_semctl(struct kern_ipc_perm *sma, int cmd)
1273 {
1274         return call_int_hook(sem_semctl, 0, sma, cmd);
1275 }
1276
1277 int security_sem_semop(struct kern_ipc_perm *sma, struct sembuf *sops,
1278                         unsigned nsops, int alter)
1279 {
1280         return call_int_hook(sem_semop, 0, sma, sops, nsops, alter);
1281 }
1282
1283 void security_d_instantiate(struct dentry *dentry, struct inode *inode)
1284 {
1285         if (unlikely(inode && IS_PRIVATE(inode)))
1286                 return;
1287         call_void_hook(d_instantiate, dentry, inode);
1288 }
1289 EXPORT_SYMBOL(security_d_instantiate);
1290
1291 int security_getprocattr(struct task_struct *p, char *name, char **value)
1292 {
1293         return call_int_hook(getprocattr, -EINVAL, p, name, value);
1294 }
1295
1296 int security_setprocattr(const char *name, void *value, size_t size)
1297 {
1298         return call_int_hook(setprocattr, -EINVAL, name, value, size);
1299 }
1300
1301 int security_netlink_send(struct sock *sk, struct sk_buff *skb)
1302 {
1303         return call_int_hook(netlink_send, 0, sk, skb);
1304 }
1305
1306 int security_ismaclabel(const char *name)
1307 {
1308         return call_int_hook(ismaclabel, 0, name);
1309 }
1310 EXPORT_SYMBOL(security_ismaclabel);
1311
1312 int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
1313 {
1314         return call_int_hook(secid_to_secctx, -EOPNOTSUPP, secid, secdata,
1315                                 seclen);
1316 }
1317 EXPORT_SYMBOL(security_secid_to_secctx);
1318
1319 int security_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid)
1320 {
1321         *secid = 0;
1322         return call_int_hook(secctx_to_secid, 0, secdata, seclen, secid);
1323 }
1324 EXPORT_SYMBOL(security_secctx_to_secid);
1325
1326 void security_release_secctx(char *secdata, u32 seclen)
1327 {
1328         call_void_hook(release_secctx, secdata, seclen);
1329 }
1330 EXPORT_SYMBOL(security_release_secctx);
1331
1332 void security_inode_invalidate_secctx(struct inode *inode)
1333 {
1334         call_void_hook(inode_invalidate_secctx, inode);
1335 }
1336 EXPORT_SYMBOL(security_inode_invalidate_secctx);
1337
1338 int security_inode_notifysecctx(struct inode *inode, void *ctx, u32 ctxlen)
1339 {
1340         return call_int_hook(inode_notifysecctx, 0, inode, ctx, ctxlen);
1341 }
1342 EXPORT_SYMBOL(security_inode_notifysecctx);
1343
1344 int security_inode_setsecctx(struct dentry *dentry, void *ctx, u32 ctxlen)
1345 {
1346         return call_int_hook(inode_setsecctx, 0, dentry, ctx, ctxlen);
1347 }
1348 EXPORT_SYMBOL(security_inode_setsecctx);
1349
1350 int security_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen)
1351 {
1352         return call_int_hook(inode_getsecctx, -EOPNOTSUPP, inode, ctx, ctxlen);
1353 }
1354 EXPORT_SYMBOL(security_inode_getsecctx);
1355
1356 #ifdef CONFIG_SECURITY_NETWORK
1357
1358 int security_unix_stream_connect(struct sock *sock, struct sock *other, struct sock *newsk)
1359 {
1360         return call_int_hook(unix_stream_connect, 0, sock, other, newsk);
1361 }
1362 EXPORT_SYMBOL(security_unix_stream_connect);
1363
1364 int security_unix_may_send(struct socket *sock,  struct socket *other)
1365 {
1366         return call_int_hook(unix_may_send, 0, sock, other);
1367 }
1368 EXPORT_SYMBOL(security_unix_may_send);
1369
1370 int security_socket_create(int family, int type, int protocol, int kern)
1371 {
1372         return call_int_hook(socket_create, 0, family, type, protocol, kern);
1373 }
1374
1375 int security_socket_post_create(struct socket *sock, int family,
1376                                 int type, int protocol, int kern)
1377 {
1378         return call_int_hook(socket_post_create, 0, sock, family, type,
1379                                                 protocol, kern);
1380 }
1381
1382 int security_socket_socketpair(struct socket *socka, struct socket *sockb)
1383 {
1384         return call_int_hook(socket_socketpair, 0, socka, sockb);
1385 }
1386 EXPORT_SYMBOL(security_socket_socketpair);
1387
1388 int security_socket_bind(struct socket *sock, struct sockaddr *address, int addrlen)
1389 {
1390         return call_int_hook(socket_bind, 0, sock, address, addrlen);
1391 }
1392
1393 int security_socket_connect(struct socket *sock, struct sockaddr *address, int addrlen)
1394 {
1395         return call_int_hook(socket_connect, 0, sock, address, addrlen);
1396 }
1397
1398 int security_socket_listen(struct socket *sock, int backlog)
1399 {
1400         return call_int_hook(socket_listen, 0, sock, backlog);
1401 }
1402
1403 int security_socket_accept(struct socket *sock, struct socket *newsock)
1404 {
1405         return call_int_hook(socket_accept, 0, sock, newsock);
1406 }
1407
1408 int security_socket_sendmsg(struct socket *sock, struct msghdr *msg, int size)
1409 {
1410         return call_int_hook(socket_sendmsg, 0, sock, msg, size);
1411 }
1412
1413 int security_socket_recvmsg(struct socket *sock, struct msghdr *msg,
1414                             int size, int flags)
1415 {
1416         return call_int_hook(socket_recvmsg, 0, sock, msg, size, flags);
1417 }
1418
1419 int security_socket_getsockname(struct socket *sock)
1420 {
1421         return call_int_hook(socket_getsockname, 0, sock);
1422 }
1423
1424 int security_socket_getpeername(struct socket *sock)
1425 {
1426         return call_int_hook(socket_getpeername, 0, sock);
1427 }
1428
1429 int security_socket_getsockopt(struct socket *sock, int level, int optname)
1430 {
1431         return call_int_hook(socket_getsockopt, 0, sock, level, optname);
1432 }
1433
1434 int security_socket_setsockopt(struct socket *sock, int level, int optname)
1435 {
1436         return call_int_hook(socket_setsockopt, 0, sock, level, optname);
1437 }
1438
1439 int security_socket_shutdown(struct socket *sock, int how)
1440 {
1441         return call_int_hook(socket_shutdown, 0, sock, how);
1442 }
1443
1444 int security_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
1445 {
1446         return call_int_hook(socket_sock_rcv_skb, 0, sk, skb);
1447 }
1448 EXPORT_SYMBOL(security_sock_rcv_skb);
1449
1450 int security_socket_getpeersec_stream(struct socket *sock, char __user *optval,
1451                                       int __user *optlen, unsigned len)
1452 {
1453         return call_int_hook(socket_getpeersec_stream, -ENOPROTOOPT, sock,
1454                                 optval, optlen, len);
1455 }
1456
1457 int security_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb, u32 *secid)
1458 {
1459         return call_int_hook(socket_getpeersec_dgram, -ENOPROTOOPT, sock,
1460                              skb, secid);
1461 }
1462 EXPORT_SYMBOL(security_socket_getpeersec_dgram);
1463
1464 int security_sk_alloc(struct sock *sk, int family, gfp_t priority)
1465 {
1466         return call_int_hook(sk_alloc_security, 0, sk, family, priority);
1467 }
1468
1469 void security_sk_free(struct sock *sk)
1470 {
1471         call_void_hook(sk_free_security, sk);
1472 }
1473
1474 void security_sk_clone(const struct sock *sk, struct sock *newsk)
1475 {
1476         call_void_hook(sk_clone_security, sk, newsk);
1477 }
1478 EXPORT_SYMBOL(security_sk_clone);
1479
1480 void security_sk_classify_flow(struct sock *sk, struct flowi *fl)
1481 {
1482         call_void_hook(sk_getsecid, sk, &fl->flowi_secid);
1483 }
1484 EXPORT_SYMBOL(security_sk_classify_flow);
1485
1486 void security_req_classify_flow(const struct request_sock *req, struct flowi *fl)
1487 {
1488         call_void_hook(req_classify_flow, req, fl);
1489 }
1490 EXPORT_SYMBOL(security_req_classify_flow);
1491
1492 void security_sock_graft(struct sock *sk, struct socket *parent)
1493 {
1494         call_void_hook(sock_graft, sk, parent);
1495 }
1496 EXPORT_SYMBOL(security_sock_graft);
1497
1498 int security_inet_conn_request(struct sock *sk,
1499                         struct sk_buff *skb, struct request_sock *req)
1500 {
1501         return call_int_hook(inet_conn_request, 0, sk, skb, req);
1502 }
1503 EXPORT_SYMBOL(security_inet_conn_request);
1504
1505 void security_inet_csk_clone(struct sock *newsk,
1506                         const struct request_sock *req)
1507 {
1508         call_void_hook(inet_csk_clone, newsk, req);
1509 }
1510
1511 void security_inet_conn_established(struct sock *sk,
1512                         struct sk_buff *skb)
1513 {
1514         call_void_hook(inet_conn_established, sk, skb);
1515 }
1516 EXPORT_SYMBOL(security_inet_conn_established);
1517
1518 int security_secmark_relabel_packet(u32 secid)
1519 {
1520         return call_int_hook(secmark_relabel_packet, 0, secid);
1521 }
1522 EXPORT_SYMBOL(security_secmark_relabel_packet);
1523
1524 void security_secmark_refcount_inc(void)
1525 {
1526         call_void_hook(secmark_refcount_inc);
1527 }
1528 EXPORT_SYMBOL(security_secmark_refcount_inc);
1529
1530 void security_secmark_refcount_dec(void)
1531 {
1532         call_void_hook(secmark_refcount_dec);
1533 }
1534 EXPORT_SYMBOL(security_secmark_refcount_dec);
1535
1536 int security_tun_dev_alloc_security(void **security)
1537 {
1538         return call_int_hook(tun_dev_alloc_security, 0, security);
1539 }
1540 EXPORT_SYMBOL(security_tun_dev_alloc_security);
1541
1542 void security_tun_dev_free_security(void *security)
1543 {
1544         call_void_hook(tun_dev_free_security, security);
1545 }
1546 EXPORT_SYMBOL(security_tun_dev_free_security);
1547
1548 int security_tun_dev_create(void)
1549 {
1550         return call_int_hook(tun_dev_create, 0);
1551 }
1552 EXPORT_SYMBOL(security_tun_dev_create);
1553
1554 int security_tun_dev_attach_queue(void *security)
1555 {
1556         return call_int_hook(tun_dev_attach_queue, 0, security);
1557 }
1558 EXPORT_SYMBOL(security_tun_dev_attach_queue);
1559
1560 int security_tun_dev_attach(struct sock *sk, void *security)
1561 {
1562         return call_int_hook(tun_dev_attach, 0, sk, security);
1563 }
1564 EXPORT_SYMBOL(security_tun_dev_attach);
1565
1566 int security_tun_dev_open(void *security)
1567 {
1568         return call_int_hook(tun_dev_open, 0, security);
1569 }
1570 EXPORT_SYMBOL(security_tun_dev_open);
1571
1572 int security_sctp_assoc_request(struct sctp_endpoint *ep, struct sk_buff *skb)
1573 {
1574         return call_int_hook(sctp_assoc_request, 0, ep, skb);
1575 }
1576 EXPORT_SYMBOL(security_sctp_assoc_request);
1577
1578 int security_sctp_bind_connect(struct sock *sk, int optname,
1579                                struct sockaddr *address, int addrlen)
1580 {
1581         return call_int_hook(sctp_bind_connect, 0, sk, optname,
1582                              address, addrlen);
1583 }
1584 EXPORT_SYMBOL(security_sctp_bind_connect);
1585
1586 void security_sctp_sk_clone(struct sctp_endpoint *ep, struct sock *sk,
1587                             struct sock *newsk)
1588 {
1589         call_void_hook(sctp_sk_clone, ep, sk, newsk);
1590 }
1591 EXPORT_SYMBOL(security_sctp_sk_clone);
1592
1593 #endif  /* CONFIG_SECURITY_NETWORK */
1594
1595 #ifdef CONFIG_SECURITY_INFINIBAND
1596
1597 int security_ib_pkey_access(void *sec, u64 subnet_prefix, u16 pkey)
1598 {
1599         return call_int_hook(ib_pkey_access, 0, sec, subnet_prefix, pkey);
1600 }
1601 EXPORT_SYMBOL(security_ib_pkey_access);
1602
1603 int security_ib_endport_manage_subnet(void *sec, const char *dev_name, u8 port_num)
1604 {
1605         return call_int_hook(ib_endport_manage_subnet, 0, sec, dev_name, port_num);
1606 }
1607 EXPORT_SYMBOL(security_ib_endport_manage_subnet);
1608
1609 int security_ib_alloc_security(void **sec)
1610 {
1611         return call_int_hook(ib_alloc_security, 0, sec);
1612 }
1613 EXPORT_SYMBOL(security_ib_alloc_security);
1614
1615 void security_ib_free_security(void *sec)
1616 {
1617         call_void_hook(ib_free_security, sec);
1618 }
1619 EXPORT_SYMBOL(security_ib_free_security);
1620 #endif  /* CONFIG_SECURITY_INFINIBAND */
1621
1622 #ifdef CONFIG_SECURITY_NETWORK_XFRM
1623
1624 int security_xfrm_policy_alloc(struct xfrm_sec_ctx **ctxp,
1625                                struct xfrm_user_sec_ctx *sec_ctx,
1626                                gfp_t gfp)
1627 {
1628         return call_int_hook(xfrm_policy_alloc_security, 0, ctxp, sec_ctx, gfp);
1629 }
1630 EXPORT_SYMBOL(security_xfrm_policy_alloc);
1631
1632 int security_xfrm_policy_clone(struct xfrm_sec_ctx *old_ctx,
1633                               struct xfrm_sec_ctx **new_ctxp)
1634 {
1635         return call_int_hook(xfrm_policy_clone_security, 0, old_ctx, new_ctxp);
1636 }
1637
1638 void security_xfrm_policy_free(struct xfrm_sec_ctx *ctx)
1639 {
1640         call_void_hook(xfrm_policy_free_security, ctx);
1641 }
1642 EXPORT_SYMBOL(security_xfrm_policy_free);
1643
1644 int security_xfrm_policy_delete(struct xfrm_sec_ctx *ctx)
1645 {
1646         return call_int_hook(xfrm_policy_delete_security, 0, ctx);
1647 }
1648
1649 int security_xfrm_state_alloc(struct xfrm_state *x,
1650                               struct xfrm_user_sec_ctx *sec_ctx)
1651 {
1652         return call_int_hook(xfrm_state_alloc, 0, x, sec_ctx);
1653 }
1654 EXPORT_SYMBOL(security_xfrm_state_alloc);
1655
1656 int security_xfrm_state_alloc_acquire(struct xfrm_state *x,
1657                                       struct xfrm_sec_ctx *polsec, u32 secid)
1658 {
1659         return call_int_hook(xfrm_state_alloc_acquire, 0, x, polsec, secid);
1660 }
1661
1662 int security_xfrm_state_delete(struct xfrm_state *x)
1663 {
1664         return call_int_hook(xfrm_state_delete_security, 0, x);
1665 }
1666 EXPORT_SYMBOL(security_xfrm_state_delete);
1667
1668 void security_xfrm_state_free(struct xfrm_state *x)
1669 {
1670         call_void_hook(xfrm_state_free_security, x);
1671 }
1672
1673 int security_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir)
1674 {
1675         return call_int_hook(xfrm_policy_lookup, 0, ctx, fl_secid, dir);
1676 }
1677
1678 int security_xfrm_state_pol_flow_match(struct xfrm_state *x,
1679                                        struct xfrm_policy *xp,
1680                                        const struct flowi *fl)
1681 {
1682         struct security_hook_list *hp;
1683         int rc = 1;
1684
1685         /*
1686          * Since this function is expected to return 0 or 1, the judgment
1687          * becomes difficult if multiple LSMs supply this call. Fortunately,
1688          * we can use the first LSM's judgment because currently only SELinux
1689          * supplies this call.
1690          *
1691          * For speed optimization, we explicitly break the loop rather than
1692          * using the macro
1693          */
1694         hlist_for_each_entry(hp, &security_hook_heads.xfrm_state_pol_flow_match,
1695                                 list) {
1696                 rc = hp->hook.xfrm_state_pol_flow_match(x, xp, fl);
1697                 break;
1698         }
1699         return rc;
1700 }
1701
1702 int security_xfrm_decode_session(struct sk_buff *skb, u32 *secid)
1703 {
1704         return call_int_hook(xfrm_decode_session, 0, skb, secid, 1);
1705 }
1706
1707 void security_skb_classify_flow(struct sk_buff *skb, struct flowi *fl)
1708 {
1709         int rc = call_int_hook(xfrm_decode_session, 0, skb, &fl->flowi_secid,
1710                                 0);
1711
1712         BUG_ON(rc);
1713 }
1714 EXPORT_SYMBOL(security_skb_classify_flow);
1715
1716 #endif  /* CONFIG_SECURITY_NETWORK_XFRM */
1717
1718 #ifdef CONFIG_KEYS
1719
1720 int security_key_alloc(struct key *key, const struct cred *cred,
1721                        unsigned long flags)
1722 {
1723         return call_int_hook(key_alloc, 0, key, cred, flags);
1724 }
1725
1726 void security_key_free(struct key *key)
1727 {
1728         call_void_hook(key_free, key);
1729 }
1730
1731 int security_key_permission(key_ref_t key_ref,
1732                             const struct cred *cred, unsigned perm)
1733 {
1734         return call_int_hook(key_permission, 0, key_ref, cred, perm);
1735 }
1736
1737 int security_key_getsecurity(struct key *key, char **_buffer)
1738 {
1739         *_buffer = NULL;
1740         return call_int_hook(key_getsecurity, 0, key, _buffer);
1741 }
1742
1743 #endif  /* CONFIG_KEYS */
1744
1745 #ifdef CONFIG_AUDIT
1746
1747 int security_audit_rule_init(u32 field, u32 op, char *rulestr, void **lsmrule)
1748 {
1749         return call_int_hook(audit_rule_init, 0, field, op, rulestr, lsmrule);
1750 }
1751
1752 int security_audit_rule_known(struct audit_krule *krule)
1753 {
1754         return call_int_hook(audit_rule_known, 0, krule);
1755 }
1756
1757 void security_audit_rule_free(void *lsmrule)
1758 {
1759         call_void_hook(audit_rule_free, lsmrule);
1760 }
1761
1762 int security_audit_rule_match(u32 secid, u32 field, u32 op, void *lsmrule,
1763                               struct audit_context *actx)
1764 {
1765         return call_int_hook(audit_rule_match, 0, secid, field, op, lsmrule,
1766                                 actx);
1767 }
1768 #endif /* CONFIG_AUDIT */
1769
1770 #ifdef CONFIG_BPF_SYSCALL
1771 int security_bpf(int cmd, union bpf_attr *attr, unsigned int size)
1772 {
1773         return call_int_hook(bpf, 0, cmd, attr, size);
1774 }
1775 int security_bpf_map(struct bpf_map *map, fmode_t fmode)
1776 {
1777         return call_int_hook(bpf_map, 0, map, fmode);
1778 }
1779 int security_bpf_prog(struct bpf_prog *prog)
1780 {
1781         return call_int_hook(bpf_prog, 0, prog);
1782 }
1783 int security_bpf_map_alloc(struct bpf_map *map)
1784 {
1785         return call_int_hook(bpf_map_alloc_security, 0, map);
1786 }
1787 int security_bpf_prog_alloc(struct bpf_prog_aux *aux)
1788 {
1789         return call_int_hook(bpf_prog_alloc_security, 0, aux);
1790 }
1791 void security_bpf_map_free(struct bpf_map *map)
1792 {
1793         call_void_hook(bpf_map_free_security, map);
1794 }
1795 void security_bpf_prog_free(struct bpf_prog_aux *aux)
1796 {
1797         call_void_hook(bpf_prog_free_security, aux);
1798 }
1799 #endif /* CONFIG_BPF_SYSCALL */