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