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(current, cred, ns, cap,
 166                                      SECURITY_CAP_AUDIT);
 167 }
 168
 169 int security_real_capable(struct task_struct *tsk, struct user_namespace *ns,
 170                           int cap)
 171 {
 172         const struct cred *cred;
 173         int ret;
 174
 175         cred = get_task_cred(tsk);
 176         ret = security_ops->capable(tsk, cred, ns, cap, SECURITY_CAP_AUDIT);
 177         put_cred(cred);
 178         return ret;
 179 }
 180
 181 int security_real_capable_noaudit(struct task_struct *tsk,
 182                                   struct user_namespace *ns, int cap)
 183 {
 184         const struct cred *cred;
 185         int ret;
 186
 187         cred = get_task_cred(tsk);
 188         ret = security_ops->capable(tsk, cred, ns, cap, SECURITY_CAP_NOAUDIT);
 189         put_cred(cred);
 190         return ret;
 191 }
 192
 193 int security_quotactl(int cmds, int type, int id, struct super_block *sb)
 194 {
 195         return security_ops->quotactl(cmds, type, id, sb);
 196 }
 197
 198 int security_quota_on(struct dentry *dentry)
 199 {
 200         return security_ops->quota_on(dentry);
 201 }
 202
 203 int security_syslog(int type)
 204 {
 205         return security_ops->syslog(type);
 206 }
 207
 208 int security_settime(const struct timespec *ts, const struct timezone *tz)
 209 {
 210         return security_ops->settime(ts, tz);
 211 }
 212
 213 int security_vm_enough_memory(long pages)
 214 {
 215         WARN_ON(current->mm == NULL);
 216         return security_ops->vm_enough_memory(current->mm, pages);
 217 }
 218
 219 int security_vm_enough_memory_mm(struct mm_struct *mm, long pages)
 220 {
 221         WARN_ON(mm == NULL);
 222         return security_ops->vm_enough_memory(mm, pages);
 223 }
 224
 225 int security_vm_enough_memory_kern(long pages)
 226 {
 227         /* If current->mm is a kernel thread then we will pass NULL,
 228            for this specific case that is fine */
 229         return security_ops->vm_enough_memory(current->mm, pages);
 230 }
 231
 232 int security_bprm_set_creds(struct linux_binprm *bprm)
 233 {
 234         return security_ops->bprm_set_creds(bprm);
 235 }
 236
 237 int security_bprm_check(struct linux_binprm *bprm)
 238 {
 239         int ret;
 240
 241         ret = security_ops->bprm_check_security(bprm);
 242         if (ret)
 243                 return ret;
 244         return ima_bprm_check(bprm);
 245 }
 246
 247 void security_bprm_committing_creds(struct linux_binprm *bprm)
 248 {
 249         security_ops->bprm_committing_creds(bprm);
 250 }
 251
 252 void security_bprm_committed_creds(struct linux_binprm *bprm)
 253 {
 254         security_ops->bprm_committed_creds(bprm);
 255 }
 256
 257 int security_bprm_secureexec(struct linux_binprm *bprm)
 258 {
 259         return security_ops->bprm_secureexec(bprm);
 260 }
 261
 262 int security_sb_alloc(struct super_block *sb)
 263 {
 264         return security_ops->sb_alloc_security(sb);
 265 }
 266
 267 void security_sb_free(struct super_block *sb)
 268 {
 269         security_ops->sb_free_security(sb);
 270 }
 271
 272 int security_sb_copy_data(char *orig, char *copy)
 273 {
 274         return security_ops->sb_copy_data(orig, copy);
 275 }
 276 EXPORT_SYMBOL(security_sb_copy_data);
 277
 278 int security_sb_remount(struct super_block *sb, void *data)
 279 {
 280         return security_ops->sb_remount(sb, data);
 281 }
 282
 283 int security_sb_kern_mount(struct super_block *sb, int flags, void *data)
 284 {
 285         return security_ops->sb_kern_mount(sb, flags, data);
 286 }
 287
 288 int security_sb_show_options(struct seq_file *m, struct super_block *sb)
 289 {
 290         return security_ops->sb_show_options(m, sb);
 291 }
 292
 293 int security_sb_statfs(struct dentry *dentry)
 294 {
 295         return security_ops->sb_statfs(dentry);
 296 }
 297
 298 int security_sb_mount(char *dev_name, struct path *path,
 299                        char *type, unsigned long flags, void *data)
 300 {
 301         return security_ops->sb_mount(dev_name, path, type, flags, data);
 302 }
 303
 304 int security_sb_umount(struct vfsmount *mnt, int flags)
 305 {
 306         return security_ops->sb_umount(mnt, flags);
 307 }
 308
 309 int security_sb_pivotroot(struct path *old_path, struct path *new_path)
 310 {
 311         return security_ops->sb_pivotroot(old_path, new_path);
 312 }
 313
 314 int security_sb_set_mnt_opts(struct super_block *sb,
 315                                 struct security_mnt_opts *opts)
 316 {
 317         return security_ops->sb_set_mnt_opts(sb, opts);
 318 }
 319 EXPORT_SYMBOL(security_sb_set_mnt_opts);
 320
 321 void security_sb_clone_mnt_opts(const struct super_block *oldsb,
 322                                 struct super_block *newsb)
 323 {
 324         security_ops->sb_clone_mnt_opts(oldsb, newsb);
 325 }
 326 EXPORT_SYMBOL(security_sb_clone_mnt_opts);
 327
 328 int security_sb_parse_opts_str(char *options, struct security_mnt_opts *opts)
 329 {
 330         return security_ops->sb_parse_opts_str(options, opts);
 331 }
 332 EXPORT_SYMBOL(security_sb_parse_opts_str);
 333
 334 int security_inode_alloc(struct inode *inode)
 335 {
 336         inode->i_security = NULL;
 337         return security_ops->inode_alloc_security(inode);
 338 }
 339
 340 void security_inode_free(struct inode *inode)
 341 {
 342         integrity_inode_free(inode);
 343         security_ops->inode_free_security(inode);
 344 }
 345
 346 int security_inode_init_security(struct inode *inode, struct inode *dir,
 347                                  const struct qstr *qstr,
 348                                  const initxattrs initxattrs, void *fs_data)
 349 {
 350         struct xattr new_xattrs[MAX_LSM_EVM_XATTR + 1];
 351         struct xattr *lsm_xattr, *evm_xattr, *xattr;
 352         int ret;
 353
 354         if (unlikely(IS_PRIVATE(inode)))
 355                 return 0;
 356
 357         memset(new_xattrs, 0, sizeof new_xattrs);
 358         if (!initxattrs)
 359                 return security_ops->inode_init_security(inode, dir, qstr,
 360                                                          NULL, NULL, NULL);
 361         lsm_xattr = new_xattrs;
 362         ret = security_ops->inode_init_security(inode, dir, qstr,
 363                                                 &lsm_xattr->name,
 364                                                 &lsm_xattr->value,
 365                                                 &lsm_xattr->value_len);
 366         if (ret)
 367                 goto out;
 368
 369         evm_xattr = lsm_xattr + 1;
 370         ret = evm_inode_init_security(inode, lsm_xattr, evm_xattr);
 371         if (ret)
 372                 goto out;
 373         ret = initxattrs(inode, new_xattrs, fs_data);
 374 out:
 375         for (xattr = new_xattrs; xattr->name != NULL; xattr++) {
 376                 kfree(xattr->name);
 377                 kfree(xattr->value);
 378         }
 379         return (ret == -EOPNOTSUPP) ? 0 : ret;
 380 }
 381 EXPORT_SYMBOL(security_inode_init_security);
 382
 383 int security_old_inode_init_security(struct inode *inode, struct inode *dir,
 384                                      const struct qstr *qstr, char **name,
 385                                      void **value, size_t *len)
 386 {
 387         if (unlikely(IS_PRIVATE(inode)))
 388                 return -EOPNOTSUPP;
 389         return security_ops->inode_init_security(inode, dir, qstr, name, value,
 390                                                  len);
 391 }
 392 EXPORT_SYMBOL(security_old_inode_init_security);
 393
 394 #ifdef CONFIG_SECURITY_PATH
 395 int security_path_mknod(struct path *dir, struct dentry *dentry, int mode,
 396                         unsigned int dev)
 397 {
 398         if (unlikely(IS_PRIVATE(dir->dentry->d_inode)))
 399                 return 0;
 400         return security_ops->path_mknod(dir, dentry, mode, dev);
 401 }
 402 EXPORT_SYMBOL(security_path_mknod);
 403
 404 int security_path_mkdir(struct path *dir, struct dentry *dentry, int mode)
 405 {
 406         if (unlikely(IS_PRIVATE(dir->dentry->d_inode)))
 407                 return 0;
 408         return security_ops->path_mkdir(dir, dentry, mode);
 409 }
 410 EXPORT_SYMBOL(security_path_mkdir);
 411
 412 int security_path_rmdir(struct path *dir, struct dentry *dentry)
 413 {
 414         if (unlikely(IS_PRIVATE(dir->dentry->d_inode)))
 415                 return 0;
 416         return security_ops->path_rmdir(dir, dentry);
 417 }
 418 EXPORT_SYMBOL(security_path_rmdir);
 419
 420 int security_path_unlink(struct path *dir, struct dentry *dentry)
 421 {
 422         if (unlikely(IS_PRIVATE(dir->dentry->d_inode)))
 423                 return 0;
 424         return security_ops->path_unlink(dir, dentry);
 425 }
 426 EXPORT_SYMBOL(security_path_unlink);
 427
 428 int security_path_symlink(struct path *dir, struct dentry *dentry,
 429                           const char *old_name)
 430 {
 431         if (unlikely(IS_PRIVATE(dir->dentry->d_inode)))
 432                 return 0;
 433         return security_ops->path_symlink(dir, dentry, old_name);
 434 }
 435 EXPORT_SYMBOL(security_path_symlink);
 436
 437 int security_path_link(struct dentry *old_dentry, struct path *new_dir,
 438                        struct dentry *new_dentry)
 439 {
 440         int rc;
 441         if (unlikely(IS_PRIVATE(old_dentry->d_inode)))
 442                 return 0;
 443         rc = yama_path_link(old_dentry, new_dir, new_dentry);
 444         if (rc)
 445                 return rc;
 446         return security_ops->path_link(old_dentry, new_dir, new_dentry);
 447 }
 448 EXPORT_SYMBOL(security_path_link);
 449
 450 int security_path_rename(struct path *old_dir, struct dentry *old_dentry,
 451                          struct path *new_dir, struct dentry *new_dentry)
 452 {
 453         if (unlikely(IS_PRIVATE(old_dentry->d_inode) ||
 454                      (new_dentry->d_inode && IS_PRIVATE(new_dentry->d_inode))))
 455                 return 0;
 456         return security_ops->path_rename(old_dir, old_dentry, new_dir,
 457                                          new_dentry);
 458 }
 459 EXPORT_SYMBOL(security_path_rename);
 460
 461 int security_path_truncate(struct path *path)
 462 {
 463         if (unlikely(IS_PRIVATE(path->dentry->d_inode)))
 464                 return 0;
 465         return security_ops->path_truncate(path);
 466 }
 467 EXPORT_SYMBOL(security_path_truncate);
 468
 469 int security_path_chmod(struct dentry *dentry, struct vfsmount *mnt,
 470                         mode_t mode)
 471 {
 472         if (unlikely(IS_PRIVATE(dentry->d_inode)))
 473                 return 0;
 474         return security_ops->path_chmod(dentry, mnt, mode);
 475 }
 476 EXPORT_SYMBOL(security_path_chmod);
 477
 478 int security_path_chown(struct path *path, uid_t uid, gid_t gid)
 479 {
 480         if (unlikely(IS_PRIVATE(path->dentry->d_inode)))
 481                 return 0;
 482         return security_ops->path_chown(path, uid, gid);
 483 }
 484 EXPORT_SYMBOL(security_path_chown);
 485
 486 int security_path_chroot(struct path *path)
 487 {
 488         return security_ops->path_chroot(path);
 489 }
 490 #endif
 491
 492 int security_inode_create(struct inode *dir, struct dentry *dentry, int mode)
 493 {
 494         if (unlikely(IS_PRIVATE(dir)))
 495                 return 0;
 496         return security_ops->inode_create(dir, dentry, mode);
 497 }
 498 EXPORT_SYMBOL_GPL(security_inode_create);
 499
 500 int security_inode_link(struct dentry *old_dentry, struct inode *dir,
 501                          struct dentry *new_dentry)
 502 {
 503         if (unlikely(IS_PRIVATE(old_dentry->d_inode)))
 504                 return 0;
 505         return security_ops->inode_link(old_dentry, dir, new_dentry);
 506 }
 507
 508 int security_inode_unlink(struct inode *dir, struct dentry *dentry)
 509 {
 510         if (unlikely(IS_PRIVATE(dentry->d_inode)))
 511                 return 0;
 512         return security_ops->inode_unlink(dir, dentry);
 513 }
 514
 515 int security_inode_symlink(struct inode *dir, struct dentry *dentry,
 516                             const char *old_name)
 517 {
 518         if (unlikely(IS_PRIVATE(dir)))
 519                 return 0;
 520         return security_ops->inode_symlink(dir, dentry, old_name);
 521 }
 522
 523 int security_inode_mkdir(struct inode *dir, struct dentry *dentry, int mode)
 524 {
 525         if (unlikely(IS_PRIVATE(dir)))
 526                 return 0;
 527         return security_ops->inode_mkdir(dir, dentry, mode);
 528 }
 529 EXPORT_SYMBOL_GPL(security_inode_mkdir);
 530
 531 int security_inode_rmdir(struct inode *dir, struct dentry *dentry)
 532 {
 533         if (unlikely(IS_PRIVATE(dentry->d_inode)))
 534                 return 0;
 535         return security_ops->inode_rmdir(dir, dentry);
 536 }
 537
 538 int security_inode_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev)
 539 {
 540         if (unlikely(IS_PRIVATE(dir)))
 541                 return 0;
 542         return security_ops->inode_mknod(dir, dentry, mode, dev);
 543 }
 544
 545 int security_inode_rename(struct inode *old_dir, struct dentry *old_dentry,
 546                            struct inode *new_dir, struct dentry *new_dentry)
 547 {
 548         if (unlikely(IS_PRIVATE(old_dentry->d_inode) ||
 549             (new_dentry->d_inode && IS_PRIVATE(new_dentry->d_inode))))
 550                 return 0;
 551         return security_ops->inode_rename(old_dir, old_dentry,
 552                                            new_dir, new_dentry);
 553 }
 554
 555 int security_inode_readlink(struct dentry *dentry)
 556 {
 557         if (unlikely(IS_PRIVATE(dentry->d_inode)))
 558                 return 0;
 559         return security_ops->inode_readlink(dentry);
 560 }
 561 EXPORT_SYMBOL(security_inode_readlink);
 562
 563 int security_inode_follow_link(struct dentry *dentry, struct nameidata *nd)
 564 {
 565         int rc;
 566         if (unlikely(IS_PRIVATE(dentry->d_inode)))
 567                 return 0;
 568         rc = yama_inode_follow_link(dentry, nd);
 569         if (rc)
 570                 return rc;
 571         return security_ops->inode_follow_link(dentry, nd);
 572 }
 573
 574 int security_inode_permission(struct inode *inode, int mask)
 575 {
 576         if (unlikely(IS_PRIVATE(inode)))
 577                 return 0;
 578         return security_ops->inode_permission(inode, mask);
 579 }
 580 EXPORT_SYMBOL(security_inode_permission);
 581
 582 int security_inode_setattr(struct dentry *dentry, struct iattr *attr)
 583 {
 584         int ret;
 585
 586         if (unlikely(IS_PRIVATE(dentry->d_inode)))
 587                 return 0;
 588         ret = security_ops->inode_setattr(dentry, attr);
 589         if (ret)
 590                 return ret;
 591         return evm_inode_setattr(dentry, attr);
 592 }
 593 EXPORT_SYMBOL_GPL(security_inode_setattr);
 594
 595 int security_inode_getattr(struct vfsmount *mnt, struct dentry *dentry)
 596 {
 597         if (unlikely(IS_PRIVATE(dentry->d_inode)))
 598                 return 0;
 599         return security_ops->inode_getattr(mnt, dentry);
 600 }
 601
 602 int security_inode_setxattr(struct dentry *dentry, const char *name,
 603                             const void *value, size_t size, int flags)
 604 {
 605         int ret;
 606
 607         if (unlikely(IS_PRIVATE(dentry->d_inode)))
 608                 return 0;
 609         ret = security_ops->inode_setxattr(dentry, name, value, size, flags);
 610         if (ret)
 611                 return ret;
 612         return evm_inode_setxattr(dentry, name, value, size);
 613 }
 614
 615 void security_inode_post_setxattr(struct dentry *dentry, const char *name,
 616                                   const void *value, size_t size, int flags)
 617 {
 618         if (unlikely(IS_PRIVATE(dentry->d_inode)))
 619                 return;
 620         security_ops->inode_post_setxattr(dentry, name, value, size, flags);
 621         evm_inode_post_setxattr(dentry, name, value, size);
 622 }
 623
 624 int security_inode_getxattr(struct dentry *dentry, const char *name)
 625 {
 626         if (unlikely(IS_PRIVATE(dentry->d_inode)))
 627                 return 0;
 628         return security_ops->inode_getxattr(dentry, name);
 629 }
 630
 631 int security_inode_listxattr(struct dentry *dentry)
 632 {
 633         if (unlikely(IS_PRIVATE(dentry->d_inode)))
 634                 return 0;
 635         return security_ops->inode_listxattr(dentry);
 636 }
 637
 638 int security_inode_removexattr(struct dentry *dentry, const char *name)
 639 {
 640         int ret;
 641
 642         if (unlikely(IS_PRIVATE(dentry->d_inode)))
 643                 return 0;
 644         ret = security_ops->inode_removexattr(dentry, name);
 645         if (ret)
 646                 return ret;
 647         return evm_inode_removexattr(dentry, name);
 648 }
 649
 650 int security_inode_need_killpriv(struct dentry *dentry)
 651 {
 652         return security_ops->inode_need_killpriv(dentry);
 653 }
 654
 655 int security_inode_killpriv(struct dentry *dentry)
 656 {
 657         return security_ops->inode_killpriv(dentry);
 658 }
 659
 660 int security_inode_getsecurity(const struct inode *inode, const char *name, void **buffer, bool alloc)
 661 {
 662         if (unlikely(IS_PRIVATE(inode)))
 663                 return -EOPNOTSUPP;
 664         return security_ops->inode_getsecurity(inode, name, buffer, alloc);
 665 }
 666
 667 int security_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags)
 668 {
 669         if (unlikely(IS_PRIVATE(inode)))
 670                 return -EOPNOTSUPP;
 671         return security_ops->inode_setsecurity(inode, name, value, size, flags);
 672 }
 673
 674 int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size)
 675 {
 676         if (unlikely(IS_PRIVATE(inode)))
 677                 return 0;
 678         return security_ops->inode_listsecurity(inode, buffer, buffer_size);
 679 }
 680
 681 void security_inode_getsecid(const struct inode *inode, u32 *secid)
 682 {
 683         security_ops->inode_getsecid(inode, secid);
 684 }
 685
 686 int security_file_permission(struct file *file, int mask)
 687 {
 688         int ret;
 689
 690         ret = security_ops->file_permission(file, mask);
 691         if (ret)
 692                 return ret;
 693
 694         return fsnotify_perm(file, mask);
 695 }
 696 EXPORT_SYMBOL(security_file_permission);
 697
 698 int security_file_alloc(struct file *file)
 699 {
 700         return security_ops->file_alloc_security(file);
 701 }
 702
 703 void security_file_free(struct file *file)
 704 {
 705         security_ops->file_free_security(file);
 706 }
 707
 708 int security_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 709 {
 710         return security_ops->file_ioctl(file, cmd, arg);
 711 }
 712
 713 int security_file_mmap(struct file *file, unsigned long reqprot,
 714                         unsigned long prot, unsigned long flags,
 715                         unsigned long addr, unsigned long addr_only)
 716 {
 717         int ret;
 718
 719         ret = security_ops->file_mmap(file, reqprot, prot, flags, addr, addr_only);
 720         if (ret)
 721                 return ret;
 722         return ima_file_mmap(file, prot);
 723 }
 724 EXPORT_SYMBOL(security_file_mmap);
 725
 726 int security_file_mprotect(struct vm_area_struct *vma, unsigned long reqprot,
 727                             unsigned long prot)
 728 {
 729         return security_ops->file_mprotect(vma, reqprot, prot);
 730 }
 731
 732 int security_file_lock(struct file *file, unsigned int cmd)
 733 {
 734         return security_ops->file_lock(file, cmd);
 735 }
 736
 737 int security_file_fcntl(struct file *file, unsigned int cmd, unsigned long arg)
 738 {
 739         return security_ops->file_fcntl(file, cmd, arg);
 740 }
 741
 742 int security_file_set_fowner(struct file *file)
 743 {
 744         return security_ops->file_set_fowner(file);
 745 }
 746
 747 int security_file_send_sigiotask(struct task_struct *tsk,
 748                                   struct fown_struct *fown, int sig)
 749 {
 750         return security_ops->file_send_sigiotask(tsk, fown, sig);
 751 }
 752
 753 int security_file_receive(struct file *file)
 754 {
 755         return security_ops->file_receive(file);
 756 }
 757
 758 int security_dentry_open(struct file *file, const struct cred *cred)
 759 {
 760         int ret;
 761
 762         ret = security_ops->dentry_open(file, cred);
 763         if (ret)
 764                 return ret;
 765
 766         return fsnotify_perm(file, MAY_OPEN);
 767 }
 768
 769 int security_task_create(unsigned long clone_flags)
 770 {
 771         return security_ops->task_create(clone_flags);
 772 }
 773
 774 void security_task_free(struct task_struct *task)
 775 {
 776         yama_task_free(task);
 777         security_ops->task_free(task);
 778 }
 779
 780 int security_cred_alloc_blank(struct cred *cred, gfp_t gfp)
 781 {
 782         return security_ops->cred_alloc_blank(cred, gfp);
 783 }
 784
 785 void security_cred_free(struct cred *cred)
 786 {
 787         security_ops->cred_free(cred);
 788 }
 789
 790 int security_prepare_creds(struct cred *new, const struct cred *old, gfp_t gfp)
 791 {
 792         return security_ops->cred_prepare(new, old, gfp);
 793 }
 794
 795 void security_transfer_creds(struct cred *new, const struct cred *old)
 796 {
 797         security_ops->cred_transfer(new, old);
 798 }
 799
 800 int security_kernel_act_as(struct cred *new, u32 secid)
 801 {
 802         return security_ops->kernel_act_as(new, secid);
 803 }
 804
 805 int security_kernel_create_files_as(struct cred *new, struct inode *inode)
 806 {
 807         return security_ops->kernel_create_files_as(new, inode);
 808 }
 809
 810 int security_kernel_module_request(char *kmod_name)
 811 {
 812         return security_ops->kernel_module_request(kmod_name);
 813 }
 814
 815 int security_task_fix_setuid(struct cred *new, const struct cred *old,
 816                              int flags)
 817 {
 818         return security_ops->task_fix_setuid(new, old, flags);
 819 }
 820
 821 int security_task_setpgid(struct task_struct *p, pid_t pgid)
 822 {
 823         return security_ops->task_setpgid(p, pgid);
 824 }
 825
 826 int security_task_getpgid(struct task_struct *p)
 827 {
 828         return security_ops->task_getpgid(p);
 829 }
 830
 831 int security_task_getsid(struct task_struct *p)
 832 {
 833         return security_ops->task_getsid(p);
 834 }
 835
 836 void security_task_getsecid(struct task_struct *p, u32 *secid)
 837 {
 838         security_ops->task_getsecid(p, secid);
 839 }
 840 EXPORT_SYMBOL(security_task_getsecid);
 841
 842 int security_task_setnice(struct task_struct *p, int nice)
 843 {
 844         return security_ops->task_setnice(p, nice);
 845 }
 846
 847 int security_task_setioprio(struct task_struct *p, int ioprio)
 848 {
 849         return security_ops->task_setioprio(p, ioprio);
 850 }
 851
 852 int security_task_getioprio(struct task_struct *p)
 853 {
 854         return security_ops->task_getioprio(p);
 855 }
 856
 857 int security_task_setrlimit(struct task_struct *p, unsigned int resource,
 858                 struct rlimit *new_rlim)
 859 {
 860         return security_ops->task_setrlimit(p, resource, new_rlim);
 861 }
 862
 863 int security_task_setscheduler(struct task_struct *p)
 864 {
 865         return security_ops->task_setscheduler(p);
 866 }
 867
 868 int security_task_getscheduler(struct task_struct *p)
 869 {
 870         return security_ops->task_getscheduler(p);
 871 }
 872
 873 int security_task_movememory(struct task_struct *p)
 874 {
 875         return security_ops->task_movememory(p);
 876 }
 877
 878 int security_task_kill(struct task_struct *p, struct siginfo *info,
 879                         int sig, u32 secid)
 880 {
 881         return security_ops->task_kill(p, info, sig, secid);
 882 }
 883
 884 int security_task_wait(struct task_struct *p)
 885 {
 886         return security_ops->task_wait(p);
 887 }
 888
 889 int security_task_prctl(int option, unsigned long arg2, unsigned long arg3,
 890                          unsigned long arg4, unsigned long arg5)
 891 {
 892         int rc;
 893         rc = yama_task_prctl(option, arg2, arg3, arg4, arg5);
 894         if (rc != -ENOSYS)
 895                 return rc;
 896         return security_ops->task_prctl(option, arg2, arg3, arg4, arg5);
 897 }
 898
 899 void security_task_to_inode(struct task_struct *p, struct inode *inode)
 900 {
 901         security_ops->task_to_inode(p, inode);
 902 }
 903
 904 int security_ipc_permission(struct kern_ipc_perm *ipcp, short flag)
 905 {
 906         return security_ops->ipc_permission(ipcp, flag);
 907 }
 908
 909 void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid)
 910 {
 911         security_ops->ipc_getsecid(ipcp, secid);
 912 }
 913
 914 int security_msg_msg_alloc(struct msg_msg *msg)
 915 {
 916         return security_ops->msg_msg_alloc_security(msg);
 917 }
 918
 919 void security_msg_msg_free(struct msg_msg *msg)
 920 {
 921         security_ops->msg_msg_free_security(msg);
 922 }
 923
 924 int security_msg_queue_alloc(struct msg_queue *msq)
 925 {
 926         return security_ops->msg_queue_alloc_security(msq);
 927 }
 928
 929 void security_msg_queue_free(struct msg_queue *msq)
 930 {
 931         security_ops->msg_queue_free_security(msq);
 932 }
 933
 934 int security_msg_queue_associate(struct msg_queue *msq, int msqflg)
 935 {
 936         return security_ops->msg_queue_associate(msq, msqflg);
 937 }
 938
 939 int security_msg_queue_msgctl(struct msg_queue *msq, int cmd)
 940 {
 941         return security_ops->msg_queue_msgctl(msq, cmd);
 942 }
 943
 944 int security_msg_queue_msgsnd(struct msg_queue *msq,
 945                                struct msg_msg *msg, int msqflg)
 946 {
 947         return security_ops->msg_queue_msgsnd(msq, msg, msqflg);
 948 }
 949
 950 int security_msg_queue_msgrcv(struct msg_queue *msq, struct msg_msg *msg,
 951                                struct task_struct *target, long type, int mode)
 952 {
 953         return security_ops->msg_queue_msgrcv(msq, msg, target, type, mode);
 954 }
 955
 956 int security_shm_alloc(struct shmid_kernel *shp)
 957 {
 958         return security_ops->shm_alloc_security(shp);
 959 }
 960
 961 void security_shm_free(struct shmid_kernel *shp)
 962 {
 963         security_ops->shm_free_security(shp);
 964 }
 965
 966 int security_shm_associate(struct shmid_kernel *shp, int shmflg)
 967 {
 968         return security_ops->shm_associate(shp, shmflg);
 969 }
 970
 971 int security_shm_shmctl(struct shmid_kernel *shp, int cmd)
 972 {
 973         return security_ops->shm_shmctl(shp, cmd);
 974 }
 975
 976 int security_shm_shmat(struct shmid_kernel *shp, char __user *shmaddr, int shmflg)
 977 {
 978         return security_ops->shm_shmat(shp, shmaddr, shmflg);
 979 }
 980
 981 int security_sem_alloc(struct sem_array *sma)
 982 {
 983         return security_ops->sem_alloc_security(sma);
 984 }
 985
 986 void security_sem_free(struct sem_array *sma)
 987 {
 988         security_ops->sem_free_security(sma);
 989 }
 990
 991 int security_sem_associate(struct sem_array *sma, int semflg)
 992 {
 993         return security_ops->sem_associate(sma, semflg);
 994 }
 995
 996 int security_sem_semctl(struct sem_array *sma, int cmd)
 997 {
 998         return security_ops->sem_semctl(sma, cmd);
 999 }
1000
1001 int security_sem_semop(struct sem_array *sma, struct sembuf *sops,
1002                         unsigned nsops, int alter)
1003 {
1004         return security_ops->sem_semop(sma, sops, nsops, alter);
1005 }
1006
1007 void security_d_instantiate(struct dentry *dentry, struct inode *inode)
1008 {
1009         if (unlikely(inode && IS_PRIVATE(inode)))
1010                 return;
1011         security_ops->d_instantiate(dentry, inode);
1012 }
1013 EXPORT_SYMBOL(security_d_instantiate);
1014
1015 int security_getprocattr(struct task_struct *p, char *name, char **value)
1016 {
1017         return security_ops->getprocattr(p, name, value);
1018 }
1019
1020 int security_setprocattr(struct task_struct *p, char *name, void *value, size_t size)
1021 {
1022         return security_ops->setprocattr(p, name, value, size);
1023 }
1024
1025 int security_netlink_send(struct sock *sk, struct sk_buff *skb)
1026 {
1027         return security_ops->netlink_send(sk, skb);
1028 }
1029
1030 int security_netlink_recv(struct sk_buff *skb, int cap)
1031 {
1032         return security_ops->netlink_recv(skb, cap);
1033 }
1034 EXPORT_SYMBOL(security_netlink_recv);
1035
1036 int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
1037 {
1038         return security_ops->secid_to_secctx(secid, secdata, seclen);
1039 }
1040 EXPORT_SYMBOL(security_secid_to_secctx);
1041
1042 int security_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid)
1043 {
1044         return security_ops->secctx_to_secid(secdata, seclen, secid);
1045 }
1046 EXPORT_SYMBOL(security_secctx_to_secid);
1047
1048 void security_release_secctx(char *secdata, u32 seclen)
1049 {
1050         security_ops->release_secctx(secdata, seclen);
1051 }
1052 EXPORT_SYMBOL(security_release_secctx);
1053
1054 int security_inode_notifysecctx(struct inode *inode, void *ctx, u32 ctxlen)
1055 {
1056         return security_ops->inode_notifysecctx(inode, ctx, ctxlen);
1057 }
1058 EXPORT_SYMBOL(security_inode_notifysecctx);
1059
1060 int security_inode_setsecctx(struct dentry *dentry, void *ctx, u32 ctxlen)
1061 {
1062         return security_ops->inode_setsecctx(dentry, ctx, ctxlen);
1063 }
1064 EXPORT_SYMBOL(security_inode_setsecctx);
1065
1066 int security_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen)
1067 {
1068         return security_ops->inode_getsecctx(inode, ctx, ctxlen);
1069 }
1070 EXPORT_SYMBOL(security_inode_getsecctx);
1071
1072 #ifdef CONFIG_SECURITY_NETWORK
1073
1074 int security_unix_stream_connect(struct sock *sock, struct sock *other, struct sock *newsk)
1075 {
1076         return security_ops->unix_stream_connect(sock, other, newsk);
1077 }
1078 EXPORT_SYMBOL(security_unix_stream_connect);
1079
1080 int security_unix_may_send(struct socket *sock,  struct socket *other)
1081 {
1082         return security_ops->unix_may_send(sock, other);
1083 }
1084 EXPORT_SYMBOL(security_unix_may_send);
1085
1086 int security_socket_create(int family, int type, int protocol, int kern)
1087 {
1088         return security_ops->socket_create(family, type, protocol, kern);
1089 }
1090
1091 int security_socket_post_create(struct socket *sock, int family,
1092                                 int type, int protocol, int kern)
1093 {
1094         return security_ops->socket_post_create(sock, family, type,
1095                                                 protocol, kern);
1096 }
1097
1098 int security_socket_bind(struct socket *sock, struct sockaddr *address, int addrlen)
1099 {
1100         return security_ops->socket_bind(sock, address, addrlen);
1101 }
1102
1103 int security_socket_connect(struct socket *sock, struct sockaddr *address, int addrlen)
1104 {
1105         return security_ops->socket_connect(sock, address, addrlen);
1106 }
1107
1108 int security_socket_listen(struct socket *sock, int backlog)
1109 {
1110         return security_ops->socket_listen(sock, backlog);
1111 }
1112
1113 int security_socket_accept(struct socket *sock, struct socket *newsock)
1114 {
1115         return security_ops->socket_accept(sock, newsock);
1116 }
1117
1118 int security_socket_sendmsg(struct socket *sock, struct msghdr *msg, int size)
1119 {
1120         return security_ops->socket_sendmsg(sock, msg, size);
1121 }
1122
1123 int security_socket_recvmsg(struct socket *sock, struct msghdr *msg,
1124                             int size, int flags)
1125 {
1126         return security_ops->socket_recvmsg(sock, msg, size, flags);
1127 }
1128
1129 int security_socket_getsockname(struct socket *sock)
1130 {
1131         return security_ops->socket_getsockname(sock);
1132 }
1133
1134 int security_socket_getpeername(struct socket *sock)
1135 {
1136         return security_ops->socket_getpeername(sock);
1137 }
1138
1139 int security_socket_getsockopt(struct socket *sock, int level, int optname)
1140 {
1141         return security_ops->socket_getsockopt(sock, level, optname);
1142 }
1143
1144 int security_socket_setsockopt(struct socket *sock, int level, int optname)
1145 {
1146         return security_ops->socket_setsockopt(sock, level, optname);
1147 }
1148
1149 int security_socket_shutdown(struct socket *sock, int how)
1150 {
1151         return security_ops->socket_shutdown(sock, how);
1152 }
1153
1154 int security_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
1155 {
1156         return security_ops->socket_sock_rcv_skb(sk, skb);
1157 }
1158 EXPORT_SYMBOL(security_sock_rcv_skb);
1159
1160 int security_socket_getpeersec_stream(struct socket *sock, char __user *optval,
1161                                       int __user *optlen, unsigned len)
1162 {
1163         return security_ops->socket_getpeersec_stream(sock, optval, optlen, len);
1164 }
1165
1166 int security_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb, u32 *secid)
1167 {
1168         return security_ops->socket_getpeersec_dgram(sock, skb, secid);
1169 }
1170 EXPORT_SYMBOL(security_socket_getpeersec_dgram);
1171
1172 int security_sk_alloc(struct sock *sk, int family, gfp_t priority)
1173 {
1174         return security_ops->sk_alloc_security(sk, family, priority);
1175 }
1176
1177 void security_sk_free(struct sock *sk)
1178 {
1179         security_ops->sk_free_security(sk);
1180 }
1181
1182 void security_sk_clone(const struct sock *sk, struct sock *newsk)
1183 {
1184         security_ops->sk_clone_security(sk, newsk);
1185 }
1186 EXPORT_SYMBOL(security_sk_clone);
1187
1188 void security_sk_classify_flow(struct sock *sk, struct flowi *fl)
1189 {
1190         security_ops->sk_getsecid(sk, &fl->flowi_secid);
1191 }
1192 EXPORT_SYMBOL(security_sk_classify_flow);
1193
1194 void security_req_classify_flow(const struct request_sock *req, struct flowi *fl)
1195 {
1196         security_ops->req_classify_flow(req, fl);
1197 }
1198 EXPORT_SYMBOL(security_req_classify_flow);
1199
1200 void security_sock_graft(struct sock *sk, struct socket *parent)
1201 {
1202         security_ops->sock_graft(sk, parent);
1203 }
1204 EXPORT_SYMBOL(security_sock_graft);
1205
1206 int security_inet_conn_request(struct sock *sk,
1207                         struct sk_buff *skb, struct request_sock *req)
1208 {
1209         return security_ops->inet_conn_request(sk, skb, req);
1210 }
1211 EXPORT_SYMBOL(security_inet_conn_request);
1212
1213 void security_inet_csk_clone(struct sock *newsk,
1214                         const struct request_sock *req)
1215 {
1216         security_ops->inet_csk_clone(newsk, req);
1217 }
1218
1219 void security_inet_conn_established(struct sock *sk,
1220                         struct sk_buff *skb)
1221 {
1222         security_ops->inet_conn_established(sk, skb);
1223 }
1224
1225 int security_secmark_relabel_packet(u32 secid)
1226 {
1227         return security_ops->secmark_relabel_packet(secid);
1228 }
1229 EXPORT_SYMBOL(security_secmark_relabel_packet);
1230
1231 void security_secmark_refcount_inc(void)
1232 {
1233         security_ops->secmark_refcount_inc();
1234 }
1235 EXPORT_SYMBOL(security_secmark_refcount_inc);
1236
1237 void security_secmark_refcount_dec(void)
1238 {
1239         security_ops->secmark_refcount_dec();
1240 }
1241 EXPORT_SYMBOL(security_secmark_refcount_dec);
1242
1243 int security_tun_dev_create(void)
1244 {
1245         return security_ops->tun_dev_create();
1246 }
1247 EXPORT_SYMBOL(security_tun_dev_create);
1248
1249 void security_tun_dev_post_create(struct sock *sk)
1250 {
1251         return security_ops->tun_dev_post_create(sk);
1252 }
1253 EXPORT_SYMBOL(security_tun_dev_post_create);
1254
1255 int security_tun_dev_attach(struct sock *sk)
1256 {
1257         return security_ops->tun_dev_attach(sk);
1258 }
1259 EXPORT_SYMBOL(security_tun_dev_attach);
1260
1261 #endif  /* CONFIG_SECURITY_NETWORK */
1262
1263 #ifdef CONFIG_SECURITY_NETWORK_XFRM
1264
1265 int security_xfrm_policy_alloc(struct xfrm_sec_ctx **ctxp, struct xfrm_user_sec_ctx *sec_ctx)
1266 {
1267         return security_ops->xfrm_policy_alloc_security(ctxp, sec_ctx);
1268 }
1269 EXPORT_SYMBOL(security_xfrm_policy_alloc);
1270
1271 int security_xfrm_policy_clone(struct xfrm_sec_ctx *old_ctx,
1272                               struct xfrm_sec_ctx **new_ctxp)
1273 {
1274         return security_ops->xfrm_policy_clone_security(old_ctx, new_ctxp);
1275 }
1276
1277 void security_xfrm_policy_free(struct xfrm_sec_ctx *ctx)
1278 {
1279         security_ops->xfrm_policy_free_security(ctx);
1280 }
1281 EXPORT_SYMBOL(security_xfrm_policy_free);
1282
1283 int security_xfrm_policy_delete(struct xfrm_sec_ctx *ctx)
1284 {
1285         return security_ops->xfrm_policy_delete_security(ctx);
1286 }
1287
1288 int security_xfrm_state_alloc(struct xfrm_state *x, struct xfrm_user_sec_ctx *sec_ctx)
1289 {
1290         return security_ops->xfrm_state_alloc_security(x, sec_ctx, 0);
1291 }
1292 EXPORT_SYMBOL(security_xfrm_state_alloc);
1293
1294 int security_xfrm_state_alloc_acquire(struct xfrm_state *x,
1295                                       struct xfrm_sec_ctx *polsec, u32 secid)
1296 {
1297         if (!polsec)
1298                 return 0;
1299         /*
1300          * We want the context to be taken from secid which is usually
1301          * from the sock.
1302          */
1303         return security_ops->xfrm_state_alloc_security(x, NULL, secid);
1304 }
1305
1306 int security_xfrm_state_delete(struct xfrm_state *x)
1307 {
1308         return security_ops->xfrm_state_delete_security(x);
1309 }
1310 EXPORT_SYMBOL(security_xfrm_state_delete);
1311
1312 void security_xfrm_state_free(struct xfrm_state *x)
1313 {
1314         security_ops->xfrm_state_free_security(x);
1315 }
1316
1317 int security_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir)
1318 {
1319         return security_ops->xfrm_policy_lookup(ctx, fl_secid, dir);
1320 }
1321
1322 int security_xfrm_state_pol_flow_match(struct xfrm_state *x,
1323                                        struct xfrm_policy *xp,
1324                                        const struct flowi *fl)
1325 {
1326         return security_ops->xfrm_state_pol_flow_match(x, xp, fl);
1327 }
1328
1329 int security_xfrm_decode_session(struct sk_buff *skb, u32 *secid)
1330 {
1331         return security_ops->xfrm_decode_session(skb, secid, 1);
1332 }
1333
1334 void security_skb_classify_flow(struct sk_buff *skb, struct flowi *fl)
1335 {
1336         int rc = security_ops->xfrm_decode_session(skb, &fl->flowi_secid, 0);
1337
1338         BUG_ON(rc);
1339 }
1340 EXPORT_SYMBOL(security_skb_classify_flow);
1341
1342 #endif  /* CONFIG_SECURITY_NETWORK_XFRM */
1343
1344 #ifdef CONFIG_KEYS
1345
1346 int security_key_alloc(struct key *key, const struct cred *cred,
1347                        unsigned long flags)
1348 {
1349         return security_ops->key_alloc(key, cred, flags);
1350 }
1351
1352 void security_key_free(struct key *key)
1353 {
1354         security_ops->key_free(key);
1355 }
1356
1357 int security_key_permission(key_ref_t key_ref,
1358                             const struct cred *cred, key_perm_t perm)
1359 {
1360         return security_ops->key_permission(key_ref, cred, perm);
1361 }
1362
1363 int security_key_getsecurity(struct key *key, char **_buffer)
1364 {
1365         return security_ops->key_getsecurity(key, _buffer);
1366 }
1367
1368 #endif  /* CONFIG_KEYS */
1369
1370 #ifdef CONFIG_AUDIT
1371
1372 int security_audit_rule_init(u32 field, u32 op, char *rulestr, void **lsmrule)
1373 {
1374         return security_ops->audit_rule_init(field, op, rulestr, lsmrule);
1375 }
1376
1377 int security_audit_rule_known(struct audit_krule *krule)
1378 {
1379         return security_ops->audit_rule_known(krule);
1380 }
1381
1382 void security_audit_rule_free(void *lsmrule)
1383 {
1384         security_ops->audit_rule_free(lsmrule);
1385 }
1386
1387 int security_audit_rule_match(u32 secid, u32 field, u32 op, void *lsmrule,
1388                               struct audit_context *actx)
1389 {
1390         return security_ops->audit_rule_match(secid, field, op, lsmrule, actx);
1391 }
1392
1393 #endif /* CONFIG_AUDIT */