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