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