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