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  *
   8  *      This program is free software; you can redistribute it and/or modify
   9  *      it under the terms of the GNU General Public License as published by
  10  *      the Free Software Foundation; either version 2 of the License, or
  11  *      (at your option) any later version.
  12  */
  13
  14 #include <linux/capability.h>
  15 #include <linux/module.h>
  16 #include <linux/init.h>
  17 #include <linux/kernel.h>
  18 #include <linux/security.h>
  19 #include <linux/integrity.h>
  20 #include <linux/ima.h>
  21 #include <linux/evm.h>
  22
  23 #define MAX_LSM_EVM_XATTR       2
  24
  25 /* Boot-time LSM user choice */
  26 static __initdata char chosen_lsm[SECURITY_NAME_MAX + 1] =
  27         CONFIG_DEFAULT_SECURITY;
  28
  29 static struct security_operations *security_ops;
  30 static struct security_operations default_security_ops = {
  31         .name   = "default",
  32 };
  33
  34 static inline int __init verify(struct security_operations *ops)
  35 {
  36         /* verify the security_operations structure exists */
  37         if (!ops)
  38                 return -EINVAL;
  39         security_fixup_ops(ops);
  40         return 0;
  41 }
  42
  43 static void __init do_security_initcalls(void)
  44 {
  45         initcall_t *call;
  46         call = __security_initcall_start;
  47         while (call < __security_initcall_end) {
  48                 (*call) ();
  49                 call++;
  50         }
  51 }
  52
  53 /**
  54  * security_init - initializes the security framework
  55  *
  56  * This should be called early in the kernel initialization sequence.
  57  */
  58 int __init security_init(void)
  59 {
  60         printk(KERN_INFO "Security Framework initialized\n");
  61
  62         security_fixup_ops(&default_security_ops);
  63         security_ops = &default_security_ops;
  64         do_security_initcalls();
  65
  66         return 0;
  67 }
  68
  69 void reset_security_ops(void)
  70 {
  71         security_ops = &default_security_ops;
  72 }
  73
  74 /* Save user chosen LSM */
  75 static int __init choose_lsm(char *str)
  76 {
  77         strncpy(chosen_lsm, str, SECURITY_NAME_MAX);
  78         return 1;
  79 }
  80 __setup("security=", choose_lsm);
  81
  82 /**
  83  * security_module_enable - Load given security module on boot ?
  84  * @ops: a pointer to the struct security_operations that is to be checked.
  85  *
  86  * Each LSM must pass this method before registering its own operations
  87  * to avoid security registration races. This method may also be used
  88  * to check if your LSM is currently loaded during kernel initialization.
  89  *
  90  * Return true if:
  91  *      -The passed LSM is the one chosen by user at boot time,
  92  *      -or the passed LSM is configured as the default and the user did not
  93  *       choose an alternate LSM at boot time.
  94  * Otherwise, return false.
  95  */
  96 int __init security_module_enable(struct security_operations *ops)
  97 {
  98         return !strcmp(ops->name, chosen_lsm);
  99 }
 100
 101 /**
 102  * register_security - registers a security framework with the kernel
 103  * @ops: a pointer to the struct security_options that is to be registered
 104  *
 105  * This function allows a security module to register itself with the
 106  * kernel security subsystem.  Some rudimentary checking is done on the @ops
 107  * value passed to this function. You'll need to check first if your LSM
 108  * is allowed to register its @ops by calling security_module_enable(@ops).
 109  *
 110  * If there is already a security module registered with the kernel,
 111  * an error will be returned.  Otherwise %0 is returned on success.
 112  */
 113 int __init register_security(struct security_operations *ops)
 114 {
 115         if (verify(ops)) {
 116                 printk(KERN_DEBUG "%s could not verify "
 117                        "security_operations structure.\n", __func__);
 118                 return -EINVAL;
 119         }
 120
 121         if (security_ops != &default_security_ops)
 122                 return -EAGAIN;
 123
 124         security_ops = ops;
 125
 126         return 0;
 127 }
 128
 129 /* Security operations */
 130
 131 int security_ptrace_access_check(struct task_struct *child, unsigned int mode)
 132 {
 133         int rc;
 134         rc = yama_ptrace_access_check(child, mode);
 135         if (rc)
 136                 return rc;
 137         return security_ops->ptrace_access_check(child, mode);
 138 }
 139
 140 int security_ptrace_traceme(struct task_struct *parent)
 141 {
 142         return security_ops->ptrace_traceme(parent);
 143 }
 144
 145 int security_capget(struct task_struct *target,
 146                      kernel_cap_t *effective,
 147                      kernel_cap_t *inheritable,
 148                      kernel_cap_t *permitted)
 149 {
 150         return security_ops->capget(target, effective, inheritable, permitted);
 151 }
 152
 153 int security_capset(struct cred *new, const struct cred *old,
 154                     const kernel_cap_t *effective,
 155                     const kernel_cap_t *inheritable,
 156                     const kernel_cap_t *permitted)
 157 {
 158         return security_ops->capset(new, old,
 159                                     effective, inheritable, permitted);
 160 }
 161
 162 int security_capable(struct user_namespace *ns, const struct cred *cred,
 163                      int cap)
 164 {
 165         return security_ops->capable(cred, ns, cap, SECURITY_CAP_AUDIT);
 166 }
 167
 168 int security_real_capable(struct task_struct *tsk, struct user_namespace *ns,
 169                           int cap)
 170 {
 171         const struct cred *cred;
 172         int ret;
 173
 174         cred = get_task_cred(tsk);
 175         ret = security_ops->capable(cred, ns, cap, SECURITY_CAP_AUDIT);
 176         put_cred(cred);
 177         return ret;
 178 }
 179
 180 int security_real_capable_noaudit(struct task_struct *tsk,
 181                                   struct user_namespace *ns, int cap)
 182 {
 183         const struct cred *cred;
 184         int ret;
 185
 186         cred = get_task_cred(tsk);
 187         ret = security_ops->capable(cred, ns, cap, SECURITY_CAP_NOAUDIT);
 188         put_cred(cred);
 189         return ret;
 190 }
 191
 192 int security_quotactl(int cmds, int type, int id, struct super_block *sb)
 193 {
 194         return security_ops->quotactl(cmds, type, id, sb);
 195 }
 196
 197 int security_quota_on(struct dentry *dentry)
 198 {
 199         return security_ops->quota_on(dentry);
 200 }
 201
 202 int security_syslog(int type)
 203 {
 204         return security_ops->syslog(type);
 205 }
 206
 207 int security_settime(const struct timespec *ts, const struct timezone *tz)
 208 {
 209         return security_ops->settime(ts, tz);
 210 }
 211
 212 int security_vm_enough_memory(long pages)
 213 {
 214         WARN_ON(current->mm == NULL);
 215         return security_ops->vm_enough_memory(current->mm, pages);
 216 }
 217
 218 int security_vm_enough_memory_mm(struct mm_struct *mm, long pages)
 219 {
 220         WARN_ON(mm == NULL);
 221         return security_ops->vm_enough_memory(mm, pages);
 222 }
 223
 224 int security_vm_enough_memory_kern(long pages)
 225 {
 226         /* If current->mm is a kernel thread then we will pass NULL,
 227            for this specific case that is fine */
 228         return security_ops->vm_enough_memory(current->mm, pages);
 229 }
 230
 231 int security_bprm_set_creds(struct linux_binprm *bprm)
 232 {
 233         return security_ops->bprm_set_creds(bprm);
 234 }
 235
 236 int security_bprm_check(struct linux_binprm *bprm)
 237 {
 238         int ret;
 239
 240         ret = security_ops->bprm_check_security(bprm);
 241         if (ret)
 242                 return ret;
 243         return ima_bprm_check(bprm);
 244 }
 245
 246 void security_bprm_committing_creds(struct linux_binprm *bprm)
 247 {
 248         security_ops->bprm_committing_creds(bprm);
 249 }
 250
 251 void security_bprm_committed_creds(struct linux_binprm *bprm)
 252 {
 253         security_ops->bprm_committed_creds(bprm);
 254 }
 255
 256 int security_bprm_secureexec(struct linux_binprm *bprm)
 257 {
 258         return security_ops->bprm_secureexec(bprm);
 259 }
 260
 261 int security_sb_alloc(struct super_block *sb)
 262 {
 263         return security_ops->sb_alloc_security(sb);
 264 }
 265
 266 void security_sb_free(struct super_block *sb)
 267 {
 268         security_ops->sb_free_security(sb);
 269 }
 270
 271 int security_sb_copy_data(char *orig, char *copy)
 272 {
 273         return security_ops->sb_copy_data(orig, copy);
 274 }
 275 EXPORT_SYMBOL(security_sb_copy_data);
 276
 277 int security_sb_remount(struct super_block *sb, void *data)
 278 {
 279         return security_ops->sb_remount(sb, data);
 280 }
 281
 282 int security_sb_kern_mount(struct super_block *sb, int flags, void *data)
 283 {
 284         return security_ops->sb_kern_mount(sb, flags, data);
 285 }
 286
 287 int security_sb_show_options(struct seq_file *m, struct super_block *sb)
 288 {
 289         return security_ops->sb_show_options(m, sb);
 290 }
 291
 292 int security_sb_statfs(struct dentry *dentry)
 293 {
 294         return security_ops->sb_statfs(dentry);
 295 }
 296
 297 int security_sb_mount(char *dev_name, struct path *path,
 298                        char *type, unsigned long flags, void *data)
 299 {
 300         return security_ops->sb_mount(dev_name, path, type, flags, data);
 301 }
 302
 303 int security_sb_umount(struct vfsmount *mnt, int flags)
 304 {
 305         return security_ops->sb_umount(mnt, flags);
 306 }
 307
 308 int security_sb_pivotroot(struct path *old_path, struct path *new_path)
 309 {
 310         return security_ops->sb_pivotroot(old_path, new_path);
 311 }
 312
 313 int security_sb_set_mnt_opts(struct super_block *sb,
 314                                 struct security_mnt_opts *opts)
 315 {
 316         return security_ops->sb_set_mnt_opts(sb, opts);
 317 }
 318 EXPORT_SYMBOL(security_sb_set_mnt_opts);
 319
 320 void security_sb_clone_mnt_opts(const struct super_block *oldsb,
 321                                 struct super_block *newsb)
 322 {
 323         security_ops->sb_clone_mnt_opts(oldsb, newsb);
 324 }
 325 EXPORT_SYMBOL(security_sb_clone_mnt_opts);
 326
 327 int security_sb_parse_opts_str(char *options, struct security_mnt_opts *opts)
 328 {
 329         return security_ops->sb_parse_opts_str(options, opts);
 330 }
 331 EXPORT_SYMBOL(security_sb_parse_opts_str);
 332
 333 int security_inode_alloc(struct inode *inode)
 334 {
 335         inode->i_security = NULL;
 336         return security_ops->inode_alloc_security(inode);
 337 }
 338
 339 void security_inode_free(struct inode *inode)
 340 {
 341         integrity_inode_free(inode);
 342         security_ops->inode_free_security(inode);
 343 }
 344
 345 int security_inode_init_security(struct inode *inode, struct inode *dir,
 346                                  const struct qstr *qstr,
 347                                  const initxattrs initxattrs, void *fs_data)
 348 {
 349         struct xattr new_xattrs[MAX_LSM_EVM_XATTR + 1];
 350         struct xattr *lsm_xattr, *evm_xattr, *xattr;
 351         int ret;
 352
 353         if (unlikely(IS_PRIVATE(inode)))
 354                 return 0;
 355
 356         memset(new_xattrs, 0, sizeof new_xattrs);
 357         if (!initxattrs)
 358                 return security_ops->inode_init_security(inode, dir, qstr,
 359                                                          NULL, NULL, NULL);
 360         lsm_xattr = new_xattrs;
 361         ret = security_ops->inode_init_security(inode, dir, qstr,
 362                                                 &lsm_xattr->name,
 363                                                 &lsm_xattr->value,
 364                                                 &lsm_xattr->value_len);
 365         if (ret)
 366                 goto out;
 367
 368         evm_xattr = lsm_xattr + 1;
 369         ret = evm_inode_init_security(inode, lsm_xattr, evm_xattr);
 370         if (ret)
 371                 goto out;
 372         ret = initxattrs(inode, new_xattrs, fs_data);
 373 out:
 374         for (xattr = new_xattrs; xattr->name != NULL; xattr++) {
 375                 kfree(xattr->name);
 376                 kfree(xattr->value);
 377         }
 378         return (ret == -EOPNOTSUPP) ? 0 : ret;
 379 }
 380 EXPORT_SYMBOL(security_inode_init_security);
 381
 382 int security_old_inode_init_security(struct inode *inode, struct inode *dir,
 383                                      const struct qstr *qstr, char **name,
 384                                      void **value, size_t *len)
 385 {
 386         if (unlikely(IS_PRIVATE(inode)))
 387                 return -EOPNOTSUPP;
 388         return security_ops->inode_init_security(inode, dir, qstr, name, value,
 389                                                  len);
 390 }
 391 EXPORT_SYMBOL(security_old_inode_init_security);
 392
 393 #ifdef CONFIG_SECURITY_PATH
 394 int security_path_mknod(struct path *dir, struct dentry *dentry, umode_t mode,
 395                         unsigned int dev)
 396 {
 397         if (unlikely(IS_PRIVATE(dir->dentry->d_inode)))
 398                 return 0;
 399         return security_ops->path_mknod(dir, dentry, mode, dev);
 400 }
 401 EXPORT_SYMBOL(security_path_mknod);
 402
 403 int security_path_mkdir(struct path *dir, struct dentry *dentry, umode_t mode)
 404 {
 405         if (unlikely(IS_PRIVATE(dir->dentry->d_inode)))
 406                 return 0;
 407         return security_ops->path_mkdir(dir, dentry, mode);
 408 }
 409 EXPORT_SYMBOL(security_path_mkdir);
 410
 411 int security_path_rmdir(struct path *dir, struct dentry *dentry)
 412 {
 413         if (unlikely(IS_PRIVATE(dir->dentry->d_inode)))
 414                 return 0;
 415         return security_ops->path_rmdir(dir, dentry);
 416 }
 417 EXPORT_SYMBOL(security_path_rmdir);
 418
 419 int security_path_unlink(struct path *dir, struct dentry *dentry)
 420 {
 421         if (unlikely(IS_PRIVATE(dir->dentry->d_inode)))
 422                 return 0;
 423         return security_ops->path_unlink(dir, dentry);
 424 }
 425 EXPORT_SYMBOL(security_path_unlink);
 426
 427 int security_path_symlink(struct path *dir, struct dentry *dentry,
 428                           const char *old_name)
 429 {
 430         if (unlikely(IS_PRIVATE(dir->dentry->d_inode)))
 431                 return 0;
 432         return security_ops->path_symlink(dir, dentry, old_name);
 433 }
 434 EXPORT_SYMBOL(security_path_symlink);
 435
 436 int security_path_link(struct dentry *old_dentry, struct path *new_dir,
 437                        struct dentry *new_dentry)
 438 {
 439         int rc;
 440         if (unlikely(IS_PRIVATE(old_dentry->d_inode)))
 441                 return 0;
 442         rc = yama_path_link(old_dentry, new_dir, new_dentry);
 443         if (rc)
 444                 return rc;
 445         return security_ops->path_link(old_dentry, new_dir, new_dentry);
 446 }
 447 EXPORT_SYMBOL(security_path_link);
 448
 449 int security_path_rename(struct path *old_dir, struct dentry *old_dentry,
 450                          struct path *new_dir, struct dentry *new_dentry)
 451 {
 452         if (unlikely(IS_PRIVATE(old_dentry->d_inode) ||
 453                      (new_dentry->d_inode && IS_PRIVATE(new_dentry->d_inode))))
 454                 return 0;
 455         return security_ops->path_rename(old_dir, old_dentry, new_dir,
 456                                          new_dentry);
 457 }
 458 EXPORT_SYMBOL(security_path_rename);
 459
 460 int security_path_truncate(struct path *path)
 461 {
 462         if (unlikely(IS_PRIVATE(path->dentry->d_inode)))
 463                 return 0;
 464         return security_ops->path_truncate(path);
 465 }
 466 EXPORT_SYMBOL(security_path_truncate);
 467
 468 int security_path_chmod(struct path *path, umode_t mode)
 469 {
 470         if (unlikely(IS_PRIVATE(path->dentry->d_inode)))
 471                 return 0;
 472         return security_ops->path_chmod(path, mode);
 473 }
 474 EXPORT_SYMBOL(security_path_chmod);
 475
 476 int security_path_chown(struct path *path, uid_t uid, gid_t gid)
 477 {
 478         if (unlikely(IS_PRIVATE(path->dentry->d_inode)))
 479                 return 0;
 480         return security_ops->path_chown(path, uid, gid);
 481 }
 482 EXPORT_SYMBOL(security_path_chown);
 483
 484 int security_path_chroot(struct path *path)
 485 {
 486         return security_ops->path_chroot(path);
 487 }
 488 #endif
 489
 490 int security_inode_create(struct inode *dir, struct dentry *dentry, int mode)
 491 {
 492         if (unlikely(IS_PRIVATE(dir)))
 493                 return 0;
 494         return security_ops->inode_create(dir, dentry, mode);
 495 }
 496 EXPORT_SYMBOL_GPL(security_inode_create);
 497
 498 int security_inode_link(struct dentry *old_dentry, struct inode *dir,
 499                          struct dentry *new_dentry)
 500 {
 501         if (unlikely(IS_PRIVATE(old_dentry->d_inode)))
 502                 return 0;
 503         return security_ops->inode_link(old_dentry, dir, new_dentry);
 504 }
 505
 506 int security_inode_unlink(struct inode *dir, struct dentry *dentry)
 507 {
 508         if (unlikely(IS_PRIVATE(dentry->d_inode)))
 509                 return 0;
 510         return security_ops->inode_unlink(dir, dentry);
 511 }
 512
 513 int security_inode_symlink(struct inode *dir, struct dentry *dentry,
 514                             const char *old_name)
 515 {
 516         if (unlikely(IS_PRIVATE(dir)))
 517                 return 0;
 518         return security_ops->inode_symlink(dir, dentry, old_name);
 519 }
 520
 521 int security_inode_mkdir(struct inode *dir, struct dentry *dentry, int mode)
 522 {
 523         if (unlikely(IS_PRIVATE(dir)))
 524                 return 0;
 525         return security_ops->inode_mkdir(dir, dentry, mode);
 526 }
 527 EXPORT_SYMBOL_GPL(security_inode_mkdir);
 528
 529 int security_inode_rmdir(struct inode *dir, struct dentry *dentry)
 530 {
 531         if (unlikely(IS_PRIVATE(dentry->d_inode)))
 532                 return 0;
 533         return security_ops->inode_rmdir(dir, dentry);
 534 }
 535
 536 int security_inode_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev)
 537 {
 538         if (unlikely(IS_PRIVATE(dir)))
 539                 return 0;
 540         return security_ops->inode_mknod(dir, dentry, mode, dev);
 541 }
 542
 543 int security_inode_rename(struct inode *old_dir, struct dentry *old_dentry,
 544                            struct inode *new_dir, struct dentry *new_dentry)
 545 {
 546         if (unlikely(IS_PRIVATE(old_dentry->d_inode) ||
 547             (new_dentry->d_inode && IS_PRIVATE(new_dentry->d_inode))))
 548                 return 0;
 549         return security_ops->inode_rename(old_dir, old_dentry,
 550                                            new_dir, new_dentry);
 551 }
 552
 553 int security_inode_readlink(struct dentry *dentry)
 554 {
 555         if (unlikely(IS_PRIVATE(dentry->d_inode)))
 556                 return 0;
 557         return security_ops->inode_readlink(dentry);
 558 }
 559 EXPORT_SYMBOL(security_inode_readlink);
 560
 561 int security_inode_follow_link(struct dentry *dentry, struct nameidata *nd)
 562 {
 563         int rc;
 564         if (unlikely(IS_PRIVATE(dentry->d_inode)))
 565                 return 0;
 566         rc = yama_inode_follow_link(dentry, nd);
 567         if (rc)
 568                 return rc;
 569         return security_ops->inode_follow_link(dentry, nd);
 570 }
 571
 572 int security_inode_permission(struct inode *inode, int mask)
 573 {
 574         if (unlikely(IS_PRIVATE(inode)))
 575                 return 0;
 576         return security_ops->inode_permission(inode, mask);
 577 }
 578 EXPORT_SYMBOL(security_inode_permission);
 579
 580 int security_inode_setattr(struct dentry *dentry, struct iattr *attr)
 581 {
 582         int ret;
 583
 584         if (unlikely(IS_PRIVATE(dentry->d_inode)))
 585                 return 0;
 586         ret = security_ops->inode_setattr(dentry, attr);
 587         if (ret)
 588                 return ret;
 589         return evm_inode_setattr(dentry, attr);
 590 }
 591 EXPORT_SYMBOL_GPL(security_inode_setattr);
 592
 593 int security_inode_getattr(struct vfsmount *mnt, struct dentry *dentry)
 594 {
 595         if (unlikely(IS_PRIVATE(dentry->d_inode)))
 596                 return 0;
 597         return security_ops->inode_getattr(mnt, dentry);
 598 }
 599
 600 int security_inode_setxattr(struct dentry *dentry, const char *name,
 601                             const void *value, size_t size, int flags)
 602 {
 603         int ret;
 604
 605         if (unlikely(IS_PRIVATE(dentry->d_inode)))
 606                 return 0;
 607         ret = security_ops->inode_setxattr(dentry, name, value, size, flags);
 608         if (ret)
 609                 return ret;
 610         return evm_inode_setxattr(dentry, name, value, size);
 611 }
 612
 613 void security_inode_post_setxattr(struct dentry *dentry, const char *name,
 614                                   const void *value, size_t size, int flags)
 615 {
 616         if (unlikely(IS_PRIVATE(dentry->d_inode)))
 617                 return;
 618         security_ops->inode_post_setxattr(dentry, name, value, size, flags);
 619         evm_inode_post_setxattr(dentry, name, value, size);
 620 }
 621
 622 int security_inode_getxattr(struct dentry *dentry, const char *name)
 623 {
 624         if (unlikely(IS_PRIVATE(dentry->d_inode)))
 625                 return 0;
 626         return security_ops->inode_getxattr(dentry, name);
 627 }
 628
 629 int security_inode_listxattr(struct dentry *dentry)
 630 {
 631         if (unlikely(IS_PRIVATE(dentry->d_inode)))
 632                 return 0;
 633         return security_ops->inode_listxattr(dentry);
 634 }
 635
 636 int security_inode_removexattr(struct dentry *dentry, const char *name)
 637 {
 638         int ret;
 639
 640         if (unlikely(IS_PRIVATE(dentry->d_inode)))
 641                 return 0;
 642         ret = security_ops->inode_removexattr(dentry, name);
 643         if (ret)
 644                 return ret;
 645         return evm_inode_removexattr(dentry, name);
 646 }
 647
 648 int security_inode_need_killpriv(struct dentry *dentry)
 649 {
 650         return security_ops->inode_need_killpriv(dentry);
 651 }
 652
 653 int security_inode_killpriv(struct dentry *dentry)
 654 {
 655         return security_ops->inode_killpriv(dentry);
 656 }
 657
 658 int security_inode_getsecurity(const struct inode *inode, const char *name, void **buffer, bool alloc)
 659 {
 660         if (unlikely(IS_PRIVATE(inode)))
 661                 return -EOPNOTSUPP;
 662         return security_ops->inode_getsecurity(inode, name, buffer, alloc);
 663 }
 664
 665 int security_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags)
 666 {
 667         if (unlikely(IS_PRIVATE(inode)))
 668                 return -EOPNOTSUPP;
 669         return security_ops->inode_setsecurity(inode, name, value, size, flags);
 670 }
 671
 672 int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size)
 673 {
 674         if (unlikely(IS_PRIVATE(inode)))
 675                 return 0;
 676         return security_ops->inode_listsecurity(inode, buffer, buffer_size);
 677 }
 678
 679 void security_inode_getsecid(const struct inode *inode, u32 *secid)
 680 {
 681         security_ops->inode_getsecid(inode, secid);
 682 }
 683
 684 int security_file_permission(struct file *file, int mask)
 685 {
 686         int ret;
 687
 688         ret = security_ops->file_permission(file, mask);
 689         if (ret)
 690                 return ret;
 691
 692         return fsnotify_perm(file, mask);
 693 }
 694 EXPORT_SYMBOL(security_file_permission);
 695
 696 int security_file_alloc(struct file *file)
 697 {
 698         return security_ops->file_alloc_security(file);
 699 }
 700
 701 void security_file_free(struct file *file)
 702 {
 703         security_ops->file_free_security(file);
 704 }
 705
 706 int security_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 707 {
 708         return security_ops->file_ioctl(file, cmd, arg);
 709 }
 710
 711 int security_file_mmap(struct file *file, unsigned long reqprot,
 712                         unsigned long prot, unsigned long flags,
 713                         unsigned long addr, unsigned long addr_only)
 714 {
 715         int ret;
 716
 717         ret = security_ops->file_mmap(file, reqprot, prot, flags, addr, addr_only);
 718         if (ret)
 719                 return ret;
 720         return ima_file_mmap(file, prot);
 721 }
 722 EXPORT_SYMBOL(security_file_mmap);
 723
 724 int security_file_mprotect(struct vm_area_struct *vma, unsigned long reqprot,
 725                             unsigned long prot)
 726 {
 727         return security_ops->file_mprotect(vma, reqprot, prot);
 728 }
 729
 730 int security_file_lock(struct file *file, unsigned int cmd)
 731 {
 732         return security_ops->file_lock(file, cmd);
 733 }
 734
 735 int security_file_fcntl(struct file *file, unsigned int cmd, unsigned long arg)
 736 {
 737         return security_ops->file_fcntl(file, cmd, arg);
 738 }
 739
 740 int security_file_set_fowner(struct file *file)
 741 {
 742         return security_ops->file_set_fowner(file);
 743 }
 744
 745 int security_file_send_sigiotask(struct task_struct *tsk,
 746                                   struct fown_struct *fown, int sig)
 747 {
 748         return security_ops->file_send_sigiotask(tsk, fown, sig);
 749 }
 750
 751 int security_file_receive(struct file *file)
 752 {
 753         return security_ops->file_receive(file);
 754 }
 755
 756 int security_dentry_open(struct file *file, const struct cred *cred)
 757 {
 758         int ret;
 759
 760         ret = security_ops->dentry_open(file, cred);
 761         if (ret)
 762                 return ret;
 763
 764         return fsnotify_perm(file, MAY_OPEN);
 765 }
 766
 767 int security_task_create(unsigned long clone_flags)
 768 {
 769         return security_ops->task_create(clone_flags);
 770 }
 771
 772 void security_task_free(struct task_struct *task)
 773 {
 774         yama_task_free(task);
 775         security_ops->task_free(task);
 776 }
 777
 778 int security_cred_alloc_blank(struct cred *cred, gfp_t gfp)
 779 {
 780         return security_ops->cred_alloc_blank(cred, gfp);
 781 }
 782
 783 void security_cred_free(struct cred *cred)
 784 {
 785         security_ops->cred_free(cred);
 786 }
 787
 788 int security_prepare_creds(struct cred *new, const struct cred *old, gfp_t gfp)
 789 {
 790         return security_ops->cred_prepare(new, old, gfp);
 791 }
 792
 793 void security_transfer_creds(struct cred *new, const struct cred *old)
 794 {
 795         security_ops->cred_transfer(new, old);
 796 }
 797
 798 int security_kernel_act_as(struct cred *new, u32 secid)
 799 {
 800         return security_ops->kernel_act_as(new, secid);
 801 }
 802
 803 int security_kernel_create_files_as(struct cred *new, struct inode *inode)
 804 {
 805         return security_ops->kernel_create_files_as(new, inode);
 806 }
 807
 808 int security_kernel_module_request(char *kmod_name)
 809 {
 810         return security_ops->kernel_module_request(kmod_name);
 811 }
 812
 813 int security_task_fix_setuid(struct cred *new, const struct cred *old,
 814                              int flags)
 815 {
 816         return security_ops->task_fix_setuid(new, old, flags);
 817 }
 818
 819 int security_task_setpgid(struct task_struct *p, pid_t pgid)
 820 {
 821         return security_ops->task_setpgid(p, pgid);
 822 }
 823
 824 int security_task_getpgid(struct task_struct *p)
 825 {
 826         return security_ops->task_getpgid(p);
 827 }
 828
 829 int security_task_getsid(struct task_struct *p)
 830 {
 831         return security_ops->task_getsid(p);
 832 }
 833
 834 void security_task_getsecid(struct task_struct *p, u32 *secid)
 835 {
 836         security_ops->task_getsecid(p, secid);
 837 }
 838 EXPORT_SYMBOL(security_task_getsecid);
 839
 840 int security_task_setnice(struct task_struct *p, int nice)
 841 {
 842         return security_ops->task_setnice(p, nice);
 843 }
 844
 845 int security_task_setioprio(struct task_struct *p, int ioprio)
 846 {
 847         return security_ops->task_setioprio(p, ioprio);
 848 }
 849
 850 int security_task_getioprio(struct task_struct *p)
 851 {
 852         return security_ops->task_getioprio(p);
 853 }
 854
 855 int security_task_setrlimit(struct task_struct *p, unsigned int resource,
 856                 struct rlimit *new_rlim)
 857 {
 858         return security_ops->task_setrlimit(p, resource, new_rlim);
 859 }
 860
 861 int security_task_setscheduler(struct task_struct *p)
 862 {
 863         return security_ops->task_setscheduler(p);
 864 }
 865
 866 int security_task_getscheduler(struct task_struct *p)
 867 {
 868         return security_ops->task_getscheduler(p);
 869 }
 870
 871 int security_task_movememory(struct task_struct *p)
 872 {
 873         return security_ops->task_movememory(p);
 874 }
 875
 876 int security_task_kill(struct task_struct *p, struct siginfo *info,
 877                         int sig, u32 secid)
 878 {
 879         return security_ops->task_kill(p, info, sig, secid);
 880 }
 881
 882 int security_task_wait(struct task_struct *p)
 883 {
 884         return security_ops->task_wait(p);
 885 }
 886
 887 int security_task_prctl(int option, unsigned long arg2, unsigned long arg3,
 888                          unsigned long arg4, unsigned long arg5)
 889 {
 890         int rc;
 891         rc = yama_task_prctl(option, arg2, arg3, arg4, arg5);
 892         if (rc != -ENOSYS)
 893                 return rc;
 894         return security_ops->task_prctl(option, arg2, arg3, arg4, arg5);
 895 }
 896
 897 void security_task_to_inode(struct task_struct *p, struct inode *inode)
 898 {
 899         security_ops->task_to_inode(p, inode);
 900 }
 901
 902 int security_ipc_permission(struct kern_ipc_perm *ipcp, short flag)
 903 {
 904         return security_ops->ipc_permission(ipcp, flag);
 905 }
 906
 907 void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid)
 908 {
 909         security_ops->ipc_getsecid(ipcp, secid);
 910 }
 911
 912 int security_msg_msg_alloc(struct msg_msg *msg)
 913 {
 914         return security_ops->msg_msg_alloc_security(msg);
 915 }
 916
 917 void security_msg_msg_free(struct msg_msg *msg)
 918 {
 919         security_ops->msg_msg_free_security(msg);
 920 }
 921
 922 int security_msg_queue_alloc(struct msg_queue *msq)
 923 {
 924         return security_ops->msg_queue_alloc_security(msq);
 925 }
 926
 927 void security_msg_queue_free(struct msg_queue *msq)
 928 {
 929         security_ops->msg_queue_free_security(msq);
 930 }
 931
 932 int security_msg_queue_associate(struct msg_queue *msq, int msqflg)
 933 {
 934         return security_ops->msg_queue_associate(msq, msqflg);
 935 }
 936
 937 int security_msg_queue_msgctl(struct msg_queue *msq, int cmd)
 938 {
 939         return security_ops->msg_queue_msgctl(msq, cmd);
 940 }
 941
 942 int security_msg_queue_msgsnd(struct msg_queue *msq,
 943                                struct msg_msg *msg, int msqflg)
 944 {
 945         return security_ops->msg_queue_msgsnd(msq, msg, msqflg);
 946 }
 947
 948 int security_msg_queue_msgrcv(struct msg_queue *msq, struct msg_msg *msg,
 949                                struct task_struct *target, long type, int mode)
 950 {
 951         return security_ops->msg_queue_msgrcv(msq, msg, target, type, mode);
 952 }
 953
 954 int security_shm_alloc(struct shmid_kernel *shp)
 955 {
 956         return security_ops->shm_alloc_security(shp);
 957 }
 958
 959 void security_shm_free(struct shmid_kernel *shp)
 960 {
 961         security_ops->shm_free_security(shp);
 962 }
 963
 964 int security_shm_associate(struct shmid_kernel *shp, int shmflg)
 965 {
 966         return security_ops->shm_associate(shp, shmflg);
 967 }
 968
 969 int security_shm_shmctl(struct shmid_kernel *shp, int cmd)
 970 {
 971         return security_ops->shm_shmctl(shp, cmd);
 972 }
 973
 974 int security_shm_shmat(struct shmid_kernel *shp, char __user *shmaddr, int shmflg)
 975 {
 976         return security_ops->shm_shmat(shp, shmaddr, shmflg);
 977 }
 978
 979 int security_sem_alloc(struct sem_array *sma)
 980 {
 981         return security_ops->sem_alloc_security(sma);
 982 }
 983
 984 void security_sem_free(struct sem_array *sma)
 985 {
 986         security_ops->sem_free_security(sma);
 987 }
 988
 989 int security_sem_associate(struct sem_array *sma, int semflg)
 990 {
 991         return security_ops->sem_associate(sma, semflg);
 992 }
 993
 994 int security_sem_semctl(struct sem_array *sma, int cmd)
 995 {
 996         return security_ops->sem_semctl(sma, cmd);
 997 }
 998
 999 int security_sem_semop(struct sem_array *sma, struct sembuf *sops,
1000                         unsigned nsops, int alter)
1001 {
1002         return security_ops->sem_semop(sma, sops, nsops, alter);
1003 }
1004
1005 void security_d_instantiate(struct dentry *dentry, struct inode *inode)
1006 {
1007         if (unlikely(inode && IS_PRIVATE(inode)))
1008                 return;
1009         security_ops->d_instantiate(dentry, inode);
1010 }
1011 EXPORT_SYMBOL(security_d_instantiate);
1012
1013 int security_getprocattr(struct task_struct *p, char *name, char **value)
1014 {
1015         return security_ops->getprocattr(p, name, value);
1016 }
1017
1018 int security_setprocattr(struct task_struct *p, char *name, void *value, size_t size)
1019 {
1020         return security_ops->setprocattr(p, name, value, size);
1021 }
1022
1023 int security_netlink_send(struct sock *sk, struct sk_buff *skb)
1024 {
1025         return security_ops->netlink_send(sk, skb);
1026 }
1027
1028 int security_netlink_recv(struct sk_buff *skb, int cap)
1029 {
1030         return security_ops->netlink_recv(skb, cap);
1031 }
1032 EXPORT_SYMBOL(security_netlink_recv);
1033
1034 int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
1035 {
1036         return security_ops->secid_to_secctx(secid, secdata, seclen);
1037 }
1038 EXPORT_SYMBOL(security_secid_to_secctx);
1039
1040 int security_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid)
1041 {
1042         return security_ops->secctx_to_secid(secdata, seclen, secid);
1043 }
1044 EXPORT_SYMBOL(security_secctx_to_secid);
1045
1046 void security_release_secctx(char *secdata, u32 seclen)
1047 {
1048         security_ops->release_secctx(secdata, seclen);
1049 }
1050 EXPORT_SYMBOL(security_release_secctx);
1051
1052 int security_inode_notifysecctx(struct inode *inode, void *ctx, u32 ctxlen)
1053 {
1054         return security_ops->inode_notifysecctx(inode, ctx, ctxlen);
1055 }
1056 EXPORT_SYMBOL(security_inode_notifysecctx);
1057
1058 int security_inode_setsecctx(struct dentry *dentry, void *ctx, u32 ctxlen)
1059 {
1060         return security_ops->inode_setsecctx(dentry, ctx, ctxlen);
1061 }
1062 EXPORT_SYMBOL(security_inode_setsecctx);
1063
1064 int security_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen)
1065 {
1066         return security_ops->inode_getsecctx(inode, ctx, ctxlen);
1067 }
1068 EXPORT_SYMBOL(security_inode_getsecctx);
1069
1070 #ifdef CONFIG_SECURITY_NETWORK
1071
1072 int security_unix_stream_connect(struct sock *sock, struct sock *other, struct sock *newsk)
1073 {
1074         return security_ops->unix_stream_connect(sock, other, newsk);
1075 }
1076 EXPORT_SYMBOL(security_unix_stream_connect);
1077
1078 int security_unix_may_send(struct socket *sock,  struct socket *other)
1079 {
1080         return security_ops->unix_may_send(sock, other);
1081 }
1082 EXPORT_SYMBOL(security_unix_may_send);
1083
1084 int security_socket_create(int family, int type, int protocol, int kern)
1085 {
1086         return security_ops->socket_create(family, type, protocol, kern);
1087 }
1088
1089 int security_socket_post_create(struct socket *sock, int family,
1090                                 int type, int protocol, int kern)
1091 {
1092         return security_ops->socket_post_create(sock, family, type,
1093                                                 protocol, kern);
1094 }
1095
1096 int security_socket_bind(struct socket *sock, struct sockaddr *address, int addrlen)
1097 {
1098         return security_ops->socket_bind(sock, address, addrlen);
1099 }
1100
1101 int security_socket_connect(struct socket *sock, struct sockaddr *address, int addrlen)
1102 {
1103         return security_ops->socket_connect(sock, address, addrlen);
1104 }
1105
1106 int security_socket_listen(struct socket *sock, int backlog)
1107 {
1108         return security_ops->socket_listen(sock, backlog);
1109 }
1110
1111 int security_socket_accept(struct socket *sock, struct socket *newsock)
1112 {
1113         return security_ops->socket_accept(sock, newsock);
1114 }
1115
1116 int security_socket_sendmsg(struct socket *sock, struct msghdr *msg, int size)
1117 {
1118         return security_ops->socket_sendmsg(sock, msg, size);
1119 }
1120
1121 int security_socket_recvmsg(struct socket *sock, struct msghdr *msg,
1122                             int size, int flags)
1123 {
1124         return security_ops->socket_recvmsg(sock, msg, size, flags);
1125 }
1126
1127 int security_socket_getsockname(struct socket *sock)
1128 {
1129         return security_ops->socket_getsockname(sock);
1130 }
1131
1132 int security_socket_getpeername(struct socket *sock)
1133 {
1134         return security_ops->socket_getpeername(sock);
1135 }
1136
1137 int security_socket_getsockopt(struct socket *sock, int level, int optname)
1138 {
1139         return security_ops->socket_getsockopt(sock, level, optname);
1140 }
1141
1142 int security_socket_setsockopt(struct socket *sock, int level, int optname)
1143 {
1144         return security_ops->socket_setsockopt(sock, level, optname);
1145 }
1146
1147 int security_socket_shutdown(struct socket *sock, int how)
1148 {
1149         return security_ops->socket_shutdown(sock, how);
1150 }
1151
1152 int security_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
1153 {
1154         return security_ops->socket_sock_rcv_skb(sk, skb);
1155 }
1156 EXPORT_SYMBOL(security_sock_rcv_skb);
1157
1158 int security_socket_getpeersec_stream(struct socket *sock, char __user *optval,
1159                                       int __user *optlen, unsigned len)
1160 {
1161         return security_ops->socket_getpeersec_stream(sock, optval, optlen, len);
1162 }
1163
1164 int security_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb, u32 *secid)
1165 {
1166         return security_ops->socket_getpeersec_dgram(sock, skb, secid);
1167 }
1168 EXPORT_SYMBOL(security_socket_getpeersec_dgram);
1169
1170 int security_sk_alloc(struct sock *sk, int family, gfp_t priority)
1171 {
1172         return security_ops->sk_alloc_security(sk, family, priority);
1173 }
1174
1175 void security_sk_free(struct sock *sk)
1176 {
1177         security_ops->sk_free_security(sk);
1178 }
1179
1180 void security_sk_clone(const struct sock *sk, struct sock *newsk)
1181 {
1182         security_ops->sk_clone_security(sk, newsk);
1183 }
1184 EXPORT_SYMBOL(security_sk_clone);
1185
1186 void security_sk_classify_flow(struct sock *sk, struct flowi *fl)
1187 {
1188         security_ops->sk_getsecid(sk, &fl->flowi_secid);
1189 }
1190 EXPORT_SYMBOL(security_sk_classify_flow);
1191
1192 void security_req_classify_flow(const struct request_sock *req, struct flowi *fl)
1193 {
1194         security_ops->req_classify_flow(req, fl);
1195 }
1196 EXPORT_SYMBOL(security_req_classify_flow);
1197
1198 void security_sock_graft(struct sock *sk, struct socket *parent)
1199 {
1200         security_ops->sock_graft(sk, parent);
1201 }
1202 EXPORT_SYMBOL(security_sock_graft);
1203
1204 int security_inet_conn_request(struct sock *sk,
1205                         struct sk_buff *skb, struct request_sock *req)
1206 {
1207         return security_ops->inet_conn_request(sk, skb, req);
1208 }
1209 EXPORT_SYMBOL(security_inet_conn_request);
1210
1211 void security_inet_csk_clone(struct sock *newsk,
1212                         const struct request_sock *req)
1213 {
1214         security_ops->inet_csk_clone(newsk, req);
1215 }
1216
1217 void security_inet_conn_established(struct sock *sk,
1218                         struct sk_buff *skb)
1219 {
1220         security_ops->inet_conn_established(sk, skb);
1221 }
1222
1223 int security_secmark_relabel_packet(u32 secid)
1224 {
1225         return security_ops->secmark_relabel_packet(secid);
1226 }
1227 EXPORT_SYMBOL(security_secmark_relabel_packet);
1228
1229 void security_secmark_refcount_inc(void)
1230 {
1231         security_ops->secmark_refcount_inc();
1232 }
1233 EXPORT_SYMBOL(security_secmark_refcount_inc);
1234
1235 void security_secmark_refcount_dec(void)
1236 {
1237         security_ops->secmark_refcount_dec();
1238 }
1239 EXPORT_SYMBOL(security_secmark_refcount_dec);
1240
1241 int security_tun_dev_create(void)
1242 {
1243         return security_ops->tun_dev_create();
1244 }
1245 EXPORT_SYMBOL(security_tun_dev_create);
1246
1247 void security_tun_dev_post_create(struct sock *sk)
1248 {
1249         return security_ops->tun_dev_post_create(sk);
1250 }
1251 EXPORT_SYMBOL(security_tun_dev_post_create);
1252
1253 int security_tun_dev_attach(struct sock *sk)
1254 {
1255         return security_ops->tun_dev_attach(sk);
1256 }
1257 EXPORT_SYMBOL(security_tun_dev_attach);
1258
1259 #endif  /* CONFIG_SECURITY_NETWORK */
1260
1261 #ifdef CONFIG_SECURITY_NETWORK_XFRM
1262
1263 int security_xfrm_policy_alloc(struct xfrm_sec_ctx **ctxp, struct xfrm_user_sec_ctx *sec_ctx)
1264 {
1265         return security_ops->xfrm_policy_alloc_security(ctxp, sec_ctx);
1266 }
1267 EXPORT_SYMBOL(security_xfrm_policy_alloc);
1268
1269 int security_xfrm_policy_clone(struct xfrm_sec_ctx *old_ctx,
1270                               struct xfrm_sec_ctx **new_ctxp)
1271 {
1272         return security_ops->xfrm_policy_clone_security(old_ctx, new_ctxp);
1273 }
1274
1275 void security_xfrm_policy_free(struct xfrm_sec_ctx *ctx)
1276 {
1277         security_ops->xfrm_policy_free_security(ctx);
1278 }
1279 EXPORT_SYMBOL(security_xfrm_policy_free);
1280
1281 int security_xfrm_policy_delete(struct xfrm_sec_ctx *ctx)
1282 {
1283         return security_ops->xfrm_policy_delete_security(ctx);
1284 }
1285
1286 int security_xfrm_state_alloc(struct xfrm_state *x, struct xfrm_user_sec_ctx *sec_ctx)
1287 {
1288         return security_ops->xfrm_state_alloc_security(x, sec_ctx, 0);
1289 }
1290 EXPORT_SYMBOL(security_xfrm_state_alloc);
1291
1292 int security_xfrm_state_alloc_acquire(struct xfrm_state *x,
1293                                       struct xfrm_sec_ctx *polsec, u32 secid)
1294 {
1295         if (!polsec)
1296                 return 0;
1297         /*
1298          * We want the context to be taken from secid which is usually
1299          * from the sock.
1300          */
1301         return security_ops->xfrm_state_alloc_security(x, NULL, secid);
1302 }
1303
1304 int security_xfrm_state_delete(struct xfrm_state *x)
1305 {
1306         return security_ops->xfrm_state_delete_security(x);
1307 }
1308 EXPORT_SYMBOL(security_xfrm_state_delete);
1309
1310 void security_xfrm_state_free(struct xfrm_state *x)
1311 {
1312         security_ops->xfrm_state_free_security(x);
1313 }
1314
1315 int security_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir)
1316 {
1317         return security_ops->xfrm_policy_lookup(ctx, fl_secid, dir);
1318 }
1319
1320 int security_xfrm_state_pol_flow_match(struct xfrm_state *x,
1321                                        struct xfrm_policy *xp,
1322                                        const struct flowi *fl)
1323 {
1324         return security_ops->xfrm_state_pol_flow_match(x, xp, fl);
1325 }
1326
1327 int security_xfrm_decode_session(struct sk_buff *skb, u32 *secid)
1328 {
1329         return security_ops->xfrm_decode_session(skb, secid, 1);
1330 }
1331
1332 void security_skb_classify_flow(struct sk_buff *skb, struct flowi *fl)
1333 {
1334         int rc = security_ops->xfrm_decode_session(skb, &fl->flowi_secid, 0);
1335
1336         BUG_ON(rc);
1337 }
1338 EXPORT_SYMBOL(security_skb_classify_flow);
1339
1340 #endif  /* CONFIG_SECURITY_NETWORK_XFRM */
1341
1342 #ifdef CONFIG_KEYS
1343
1344 int security_key_alloc(struct key *key, const struct cred *cred,
1345                        unsigned long flags)
1346 {
1347         return security_ops->key_alloc(key, cred, flags);
1348 }
1349
1350 void security_key_free(struct key *key)
1351 {
1352         security_ops->key_free(key);
1353 }
1354
1355 int security_key_permission(key_ref_t key_ref,
1356                             const struct cred *cred, key_perm_t perm)
1357 {
1358         return security_ops->key_permission(key_ref, cred, perm);
1359 }
1360
1361 int security_key_getsecurity(struct key *key, char **_buffer)
1362 {
1363         return security_ops->key_getsecurity(key, _buffer);
1364 }
1365
1366 #endif  /* CONFIG_KEYS */
1367
1368 #ifdef CONFIG_AUDIT
1369
1370 int security_audit_rule_init(u32 field, u32 op, char *rulestr, void **lsmrule)
1371 {
1372         return security_ops->audit_rule_init(field, op, rulestr, lsmrule);
1373 }
1374
1375 int security_audit_rule_known(struct audit_krule *krule)
1376 {
1377         return security_ops->audit_rule_known(krule);
1378 }
1379
1380 void security_audit_rule_free(void *lsmrule)
1381 {
1382         security_ops->audit_rule_free(lsmrule);
1383 }
1384
1385 int security_audit_rule_match(u32 secid, u32 field, u32 op, void *lsmrule,
1386                               struct audit_context *actx)
1387 {
1388         return security_ops->audit_rule_match(secid, field, op, lsmrule, actx);
1389 }
1390
1391 #endif /* CONFIG_AUDIT */