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