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  * Copyright (C) 2016 Mellanox Technologies
   8  *
   9  *      This program is free software; you can redistribute it and/or modify
  10  *      it under the terms of the GNU General Public License as published by
  11  *      the Free Software Foundation; either version 2 of the License, or
  12  *      (at your option) any later version.
  13  */
  14
  15 #include <linux/bpf.h>
  16 #include <linux/capability.h>
  17 #include <linux/dcache.h>
  18 #include <linux/module.h>
  19 #include <linux/init.h>
  20 #include <linux/kernel.h>
  21 #include <linux/lsm_hooks.h>
  22 #include <linux/integrity.h>
  23 #include <linux/ima.h>
  24 #include <linux/evm.h>
  25 #include <linux/fsnotify.h>
  26 #include <linux/mman.h>
  27 #include <linux/mount.h>
  28 #include <linux/personality.h>
  29 #include <linux/backing-dev.h>
  30 #include <linux/string.h>
  31 #include <net/flow.h>
  32
  33 #include <trace/events/initcall.h>
  34
  35 #define MAX_LSM_EVM_XATTR       2
  36
  37 /* Maximum number of letters for an LSM name string */
  38 #define SECURITY_NAME_MAX       10
  39
  40 struct security_hook_heads security_hook_heads __lsm_ro_after_init;
  41 static ATOMIC_NOTIFIER_HEAD(lsm_notifier_chain);
  42
  43 char *lsm_names;
  44 /* Boot-time LSM user choice */
  45 static __initdata char chosen_lsm[SECURITY_NAME_MAX + 1] =
  46         CONFIG_DEFAULT_SECURITY;
  47
  48 static void __init do_security_initcalls(void)
  49 {
  50         int ret;
  51         initcall_t *call;
  52         call = __security_initcall_start;
  53         trace_initcall_level("security");
  54         while (call < __security_initcall_end) {
  55                 trace_initcall_start((*call));
  56                 ret = (*call) ();
  57                 trace_initcall_finish((*call), ret);
  58                 call++;
  59         }
  60 }
  61
  62 /**
  63  * security_init - initializes the security framework
  64  *
  65  * This should be called early in the kernel initialization sequence.
  66  */
  67 int __init security_init(void)
  68 {
  69         int i;
  70         struct hlist_head *list = (struct hlist_head *) &security_hook_heads;
  71
  72         for (i = 0; i < sizeof(security_hook_heads) / sizeof(struct hlist_head);
  73              i++)
  74                 INIT_HLIST_HEAD(&list[i]);
  75         pr_info("Security Framework initialized\n");
  76
  77         /*
  78          * Load minor LSMs, with the capability module always first.
  79          */
  80         capability_add_hooks();
  81         yama_add_hooks();
  82         loadpin_add_hooks();
  83
  84         /*
  85          * Load all the remaining security modules.
  86          */
  87         do_security_initcalls();
  88
  89         return 0;
  90 }
  91
  92 /* Save user chosen LSM */
  93 static int __init choose_lsm(char *str)
  94 {
  95         strncpy(chosen_lsm, str, SECURITY_NAME_MAX);
  96         return 1;
  97 }
  98 __setup("security=", choose_lsm);
  99
 100 static bool match_last_lsm(const char *list, const char *lsm)
 101 {
 102         const char *last;
 103
 104         if (WARN_ON(!list || !lsm))
 105                 return false;
 106         last = strrchr(list, ',');
 107         if (last)
 108                 /* Pass the comma, strcmp() will check for '\0' */
 109                 last++;
 110         else
 111                 last = list;
 112         return !strcmp(last, lsm);
 113 }
 114
 115 static int lsm_append(char *new, char **result)
 116 {
 117         char *cp;
 118
 119         if (*result == NULL) {
 120                 *result = kstrdup(new, GFP_KERNEL);
 121         } else {
 122                 /* Check if it is the last registered name */
 123                 if (match_last_lsm(*result, new))
 124                         return 0;
 125                 cp = kasprintf(GFP_KERNEL, "%s,%s", *result, new);
 126                 if (cp == NULL)
 127                         return -ENOMEM;
 128                 kfree(*result);
 129                 *result = cp;
 130         }
 131         return 0;
 132 }
 133
 134 /**
 135  * security_module_enable - Load given security module on boot ?
 136  * @module: the name of the module
 137  *
 138  * Each LSM must pass this method before registering its own operations
 139  * to avoid security registration races. This method may also be used
 140  * to check if your LSM is currently loaded during kernel initialization.
 141  *
 142  * Returns:
 143  *
 144  * true if:
 145  *
 146  * - The passed LSM is the one chosen by user at boot time,
 147  * - or the passed LSM is configured as the default and the user did not
 148  *   choose an alternate LSM at boot time.
 149  *
 150  * Otherwise, return false.
 151  */
 152 int __init security_module_enable(const char *module)
 153 {
 154         return !strcmp(module, chosen_lsm);
 155 }
 156
 157 /**
 158  * security_add_hooks - Add a modules hooks to the hook lists.
 159  * @hooks: the hooks to add
 160  * @count: the number of hooks to add
 161  * @lsm: the name of the security module
 162  *
 163  * Each LSM has to register its hooks with the infrastructure.
 164  */
 165 void __init security_add_hooks(struct security_hook_list *hooks, int count,
 166                                 char *lsm)
 167 {
 168         int i;
 169
 170         for (i = 0; i < count; i++) {
 171                 hooks[i].lsm = lsm;
 172                 hlist_add_tail_rcu(&hooks[i].list, hooks[i].head);
 173         }
 174         if (lsm_append(lsm, &lsm_names) < 0)
 175                 panic("%s - Cannot get early memory.\n", __func__);
 176 }
 177
 178 int call_lsm_notifier(enum lsm_event event, void *data)
 179 {
 180         return atomic_notifier_call_chain(&lsm_notifier_chain, event, data);
 181 }
 182 EXPORT_SYMBOL(call_lsm_notifier);
 183
 184 int register_lsm_notifier(struct notifier_block *nb)
 185 {
 186         return atomic_notifier_chain_register(&lsm_notifier_chain, nb);
 187 }
 188 EXPORT_SYMBOL(register_lsm_notifier);
 189
 190 int unregister_lsm_notifier(struct notifier_block *nb)
 191 {
 192         return atomic_notifier_chain_unregister(&lsm_notifier_chain, nb);
 193 }
 194 EXPORT_SYMBOL(unregister_lsm_notifier);
 195
 196 /*
 197  * Hook list operation macros.
 198  *
 199  * call_void_hook:
 200  *      This is a hook that does not return a value.
 201  *
 202  * call_int_hook:
 203  *      This is a hook that returns a value.
 204  */
 205
 206 #define call_void_hook(FUNC, ...)                               \
 207         do {                                                    \
 208                 struct security_hook_list *P;                   \
 209                                                                 \
 210                 hlist_for_each_entry(P, &security_hook_heads.FUNC, list) \
 211                         P->hook.FUNC(__VA_ARGS__);              \
 212         } while (0)
 213
 214 #define call_int_hook(FUNC, IRC, ...) ({                        \
 215         int RC = IRC;                                           \
 216         do {                                                    \
 217                 struct security_hook_list *P;                   \
 218                                                                 \
 219                 hlist_for_each_entry(P, &security_hook_heads.FUNC, list) { \
 220                         RC = P->hook.FUNC(__VA_ARGS__);         \
 221                         if (RC != 0)                            \
 222                                 break;                          \
 223                 }                                               \
 224         } while (0);                                            \
 225         RC;                                                     \
 226 })
 227
 228 /* Security operations */
 229
 230 int security_binder_set_context_mgr(struct task_struct *mgr)
 231 {
 232         return call_int_hook(binder_set_context_mgr, 0, mgr);
 233 }
 234
 235 int security_binder_transaction(struct task_struct *from,
 236                                 struct task_struct *to)
 237 {
 238         return call_int_hook(binder_transaction, 0, from, to);
 239 }
 240
 241 int security_binder_transfer_binder(struct task_struct *from,
 242                                     struct task_struct *to)
 243 {
 244         return call_int_hook(binder_transfer_binder, 0, from, to);
 245 }
 246
 247 int security_binder_transfer_file(struct task_struct *from,
 248                                   struct task_struct *to, struct file *file)
 249 {
 250         return call_int_hook(binder_transfer_file, 0, from, to, file);
 251 }
 252
 253 int security_ptrace_access_check(struct task_struct *child, unsigned int mode)
 254 {
 255         return call_int_hook(ptrace_access_check, 0, child, mode);
 256 }
 257
 258 int security_ptrace_traceme(struct task_struct *parent)
 259 {
 260         return call_int_hook(ptrace_traceme, 0, parent);
 261 }
 262
 263 int security_capget(struct task_struct *target,
 264                      kernel_cap_t *effective,
 265                      kernel_cap_t *inheritable,
 266                      kernel_cap_t *permitted)
 267 {
 268         return call_int_hook(capget, 0, target,
 269                                 effective, inheritable, permitted);
 270 }
 271
 272 int security_capset(struct cred *new, const struct cred *old,
 273                     const kernel_cap_t *effective,
 274                     const kernel_cap_t *inheritable,
 275                     const kernel_cap_t *permitted)
 276 {
 277         return call_int_hook(capset, 0, new, old,
 278                                 effective, inheritable, permitted);
 279 }
 280
 281 int security_capable(const struct cred *cred, struct user_namespace *ns,
 282                      int cap)
 283 {
 284         return call_int_hook(capable, 0, cred, ns, cap, SECURITY_CAP_AUDIT);
 285 }
 286
 287 int security_capable_noaudit(const struct cred *cred, struct user_namespace *ns,
 288                              int cap)
 289 {
 290         return call_int_hook(capable, 0, cred, ns, cap, SECURITY_CAP_NOAUDIT);
 291 }
 292
 293 int security_quotactl(int cmds, int type, int id, struct super_block *sb)
 294 {
 295         return call_int_hook(quotactl, 0, cmds, type, id, sb);
 296 }
 297
 298 int security_quota_on(struct dentry *dentry)
 299 {
 300         return call_int_hook(quota_on, 0, dentry);
 301 }
 302
 303 int security_syslog(int type)
 304 {
 305         return call_int_hook(syslog, 0, type);
 306 }
 307
 308 int security_settime64(const struct timespec64 *ts, const struct timezone *tz)
 309 {
 310         return call_int_hook(settime, 0, ts, tz);
 311 }
 312
 313 int security_vm_enough_memory_mm(struct mm_struct *mm, long pages)
 314 {
 315         struct security_hook_list *hp;
 316         int cap_sys_admin = 1;
 317         int rc;
 318
 319         /*
 320          * The module will respond with a positive value if
 321          * it thinks the __vm_enough_memory() call should be
 322          * made with the cap_sys_admin set. If all of the modules
 323          * agree that it should be set it will. If any module
 324          * thinks it should not be set it won't.
 325          */
 326         hlist_for_each_entry(hp, &security_hook_heads.vm_enough_memory, list) {
 327                 rc = hp->hook.vm_enough_memory(mm, pages);
 328                 if (rc <= 0) {
 329                         cap_sys_admin = 0;
 330                         break;
 331                 }
 332         }
 333         return __vm_enough_memory(mm, pages, cap_sys_admin);
 334 }
 335
 336 int security_bprm_set_creds(struct linux_binprm *bprm)
 337 {
 338         return call_int_hook(bprm_set_creds, 0, bprm);
 339 }
 340
 341 int security_bprm_check(struct linux_binprm *bprm)
 342 {
 343         int ret;
 344
 345         ret = call_int_hook(bprm_check_security, 0, bprm);
 346         if (ret)
 347                 return ret;
 348         return ima_bprm_check(bprm);
 349 }
 350
 351 void security_bprm_committing_creds(struct linux_binprm *bprm)
 352 {
 353         call_void_hook(bprm_committing_creds, bprm);
 354 }
 355
 356 void security_bprm_committed_creds(struct linux_binprm *bprm)
 357 {
 358         call_void_hook(bprm_committed_creds, bprm);
 359 }
 360
 361 int security_sb_alloc(struct super_block *sb)
 362 {
 363         return call_int_hook(sb_alloc_security, 0, sb);
 364 }
 365
 366 void security_sb_free(struct super_block *sb)
 367 {
 368         call_void_hook(sb_free_security, sb);
 369 }
 370
 371 int security_sb_copy_data(char *orig, char *copy)
 372 {
 373         return call_int_hook(sb_copy_data, 0, orig, copy);
 374 }
 375 EXPORT_SYMBOL(security_sb_copy_data);
 376
 377 int security_sb_remount(struct super_block *sb, void *data)
 378 {
 379         return call_int_hook(sb_remount, 0, sb, data);
 380 }
 381
 382 int security_sb_kern_mount(struct super_block *sb, int flags, void *data)
 383 {
 384         return call_int_hook(sb_kern_mount, 0, sb, flags, data);
 385 }
 386
 387 int security_sb_show_options(struct seq_file *m, struct super_block *sb)
 388 {
 389         return call_int_hook(sb_show_options, 0, m, sb);
 390 }
 391
 392 int security_sb_statfs(struct dentry *dentry)
 393 {
 394         return call_int_hook(sb_statfs, 0, dentry);
 395 }
 396
 397 int security_sb_mount(const char *dev_name, const struct path *path,
 398                        const char *type, unsigned long flags, void *data)
 399 {
 400         return call_int_hook(sb_mount, 0, dev_name, path, type, flags, data);
 401 }
 402
 403 int security_sb_umount(struct vfsmount *mnt, int flags)
 404 {
 405         return call_int_hook(sb_umount, 0, mnt, flags);
 406 }
 407
 408 int security_sb_pivotroot(const struct path *old_path, const struct path *new_path)
 409 {
 410         return call_int_hook(sb_pivotroot, 0, old_path, new_path);
 411 }
 412
 413 int security_sb_set_mnt_opts(struct super_block *sb,
 414                                 struct security_mnt_opts *opts,
 415                                 unsigned long kern_flags,
 416                                 unsigned long *set_kern_flags)
 417 {
 418         return call_int_hook(sb_set_mnt_opts,
 419                                 opts->num_mnt_opts ? -EOPNOTSUPP : 0, sb,
 420                                 opts, kern_flags, set_kern_flags);
 421 }
 422 EXPORT_SYMBOL(security_sb_set_mnt_opts);
 423
 424 int security_sb_clone_mnt_opts(const struct super_block *oldsb,
 425                                 struct super_block *newsb,
 426                                 unsigned long kern_flags,
 427                                 unsigned long *set_kern_flags)
 428 {
 429         return call_int_hook(sb_clone_mnt_opts, 0, oldsb, newsb,
 430                                 kern_flags, set_kern_flags);
 431 }
 432 EXPORT_SYMBOL(security_sb_clone_mnt_opts);
 433
 434 int security_sb_parse_opts_str(char *options, struct security_mnt_opts *opts)
 435 {
 436         return call_int_hook(sb_parse_opts_str, 0, options, opts);
 437 }
 438 EXPORT_SYMBOL(security_sb_parse_opts_str);
 439
 440 int security_inode_alloc(struct inode *inode)
 441 {
 442         inode->i_security = NULL;
 443         return call_int_hook(inode_alloc_security, 0, inode);
 444 }
 445
 446 void security_inode_free(struct inode *inode)
 447 {
 448         integrity_inode_free(inode);
 449         call_void_hook(inode_free_security, inode);
 450 }
 451
 452 int security_dentry_init_security(struct dentry *dentry, int mode,
 453                                         const struct qstr *name, void **ctx,
 454                                         u32 *ctxlen)
 455 {
 456         return call_int_hook(dentry_init_security, -EOPNOTSUPP, dentry, mode,
 457                                 name, ctx, ctxlen);
 458 }
 459 EXPORT_SYMBOL(security_dentry_init_security);
 460
 461 int security_dentry_create_files_as(struct dentry *dentry, int mode,
 462                                     struct qstr *name,
 463                                     const struct cred *old, struct cred *new)
 464 {
 465         return call_int_hook(dentry_create_files_as, 0, dentry, mode,
 466                                 name, old, new);
 467 }
 468 EXPORT_SYMBOL(security_dentry_create_files_as);
 469
 470 int security_inode_init_security(struct inode *inode, struct inode *dir,
 471                                  const struct qstr *qstr,
 472                                  const initxattrs initxattrs, void *fs_data)
 473 {
 474         struct xattr new_xattrs[MAX_LSM_EVM_XATTR + 1];
 475         struct xattr *lsm_xattr, *evm_xattr, *xattr;
 476         int ret;
 477
 478         if (unlikely(IS_PRIVATE(inode)))
 479                 return 0;
 480
 481         if (!initxattrs)
 482                 return call_int_hook(inode_init_security, -EOPNOTSUPP, inode,
 483                                      dir, qstr, NULL, NULL, NULL);
 484         memset(new_xattrs, 0, sizeof(new_xattrs));
 485         lsm_xattr = new_xattrs;
 486         ret = call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir, qstr,
 487                                                 &lsm_xattr->name,
 488                                                 &lsm_xattr->value,
 489                                                 &lsm_xattr->value_len);
 490         if (ret)
 491                 goto out;
 492
 493         evm_xattr = lsm_xattr + 1;
 494         ret = evm_inode_init_security(inode, lsm_xattr, evm_xattr);
 495         if (ret)
 496                 goto out;
 497         ret = initxattrs(inode, new_xattrs, fs_data);
 498 out:
 499         for (xattr = new_xattrs; xattr->value != NULL; xattr++)
 500                 kfree(xattr->value);
 501         return (ret == -EOPNOTSUPP) ? 0 : ret;
 502 }
 503 EXPORT_SYMBOL(security_inode_init_security);
 504
 505 int security_old_inode_init_security(struct inode *inode, struct inode *dir,
 506                                      const struct qstr *qstr, const char **name,
 507                                      void **value, size_t *len)
 508 {
 509         if (unlikely(IS_PRIVATE(inode)))
 510                 return -EOPNOTSUPP;
 511         return call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir,
 512                              qstr, name, value, len);
 513 }
 514 EXPORT_SYMBOL(security_old_inode_init_security);
 515
 516 #ifdef CONFIG_SECURITY_PATH
 517 int security_path_mknod(const struct path *dir, struct dentry *dentry, umode_t mode,
 518                         unsigned int dev)
 519 {
 520         if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
 521                 return 0;
 522         return call_int_hook(path_mknod, 0, dir, dentry, mode, dev);
 523 }
 524 EXPORT_SYMBOL(security_path_mknod);
 525
 526 int security_path_mkdir(const struct path *dir, struct dentry *dentry, umode_t mode)
 527 {
 528         if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
 529                 return 0;
 530         return call_int_hook(path_mkdir, 0, dir, dentry, mode);
 531 }
 532 EXPORT_SYMBOL(security_path_mkdir);
 533
 534 int security_path_rmdir(const struct path *dir, struct dentry *dentry)
 535 {
 536         if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
 537                 return 0;
 538         return call_int_hook(path_rmdir, 0, dir, dentry);
 539 }
 540
 541 int security_path_unlink(const struct path *dir, struct dentry *dentry)
 542 {
 543         if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
 544                 return 0;
 545         return call_int_hook(path_unlink, 0, dir, dentry);
 546 }
 547 EXPORT_SYMBOL(security_path_unlink);
 548
 549 int security_path_symlink(const struct path *dir, struct dentry *dentry,
 550                           const char *old_name)
 551 {
 552         if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
 553                 return 0;
 554         return call_int_hook(path_symlink, 0, dir, dentry, old_name);
 555 }
 556
 557 int security_path_link(struct dentry *old_dentry, const struct path *new_dir,
 558                        struct dentry *new_dentry)
 559 {
 560         if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry))))
 561                 return 0;
 562         return call_int_hook(path_link, 0, old_dentry, new_dir, new_dentry);
 563 }
 564
 565 int security_path_rename(const struct path *old_dir, struct dentry *old_dentry,
 566                          const struct path *new_dir, struct dentry *new_dentry,
 567                          unsigned int flags)
 568 {
 569         if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) ||
 570                      (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry)))))
 571                 return 0;
 572
 573         if (flags & RENAME_EXCHANGE) {
 574                 int err = call_int_hook(path_rename, 0, new_dir, new_dentry,
 575                                         old_dir, old_dentry);
 576                 if (err)
 577                         return err;
 578         }
 579
 580         return call_int_hook(path_rename, 0, old_dir, old_dentry, new_dir,
 581                                 new_dentry);
 582 }
 583 EXPORT_SYMBOL(security_path_rename);
 584
 585 int security_path_truncate(const struct path *path)
 586 {
 587         if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
 588                 return 0;
 589         return call_int_hook(path_truncate, 0, path);
 590 }
 591
 592 int security_path_chmod(const struct path *path, umode_t mode)
 593 {
 594         if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
 595                 return 0;
 596         return call_int_hook(path_chmod, 0, path, mode);
 597 }
 598
 599 int security_path_chown(const struct path *path, kuid_t uid, kgid_t gid)
 600 {
 601         if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
 602                 return 0;
 603         return call_int_hook(path_chown, 0, path, uid, gid);
 604 }
 605
 606 int security_path_chroot(const struct path *path)
 607 {
 608         return call_int_hook(path_chroot, 0, path);
 609 }
 610 #endif
 611
 612 int security_inode_create(struct inode *dir, struct dentry *dentry, umode_t mode)
 613 {
 614         if (unlikely(IS_PRIVATE(dir)))
 615                 return 0;
 616         return call_int_hook(inode_create, 0, dir, dentry, mode);
 617 }
 618 EXPORT_SYMBOL_GPL(security_inode_create);
 619
 620 int security_inode_link(struct dentry *old_dentry, struct inode *dir,
 621                          struct dentry *new_dentry)
 622 {
 623         if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry))))
 624                 return 0;
 625         return call_int_hook(inode_link, 0, old_dentry, dir, new_dentry);
 626 }
 627
 628 int security_inode_unlink(struct inode *dir, struct dentry *dentry)
 629 {
 630         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
 631                 return 0;
 632         return call_int_hook(inode_unlink, 0, dir, dentry);
 633 }
 634
 635 int security_inode_symlink(struct inode *dir, struct dentry *dentry,
 636                             const char *old_name)
 637 {
 638         if (unlikely(IS_PRIVATE(dir)))
 639                 return 0;
 640         return call_int_hook(inode_symlink, 0, dir, dentry, old_name);
 641 }
 642
 643 int security_inode_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
 644 {
 645         if (unlikely(IS_PRIVATE(dir)))
 646                 return 0;
 647         return call_int_hook(inode_mkdir, 0, dir, dentry, mode);
 648 }
 649 EXPORT_SYMBOL_GPL(security_inode_mkdir);
 650
 651 int security_inode_rmdir(struct inode *dir, struct dentry *dentry)
 652 {
 653         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
 654                 return 0;
 655         return call_int_hook(inode_rmdir, 0, dir, dentry);
 656 }
 657
 658 int security_inode_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t dev)
 659 {
 660         if (unlikely(IS_PRIVATE(dir)))
 661                 return 0;
 662         return call_int_hook(inode_mknod, 0, dir, dentry, mode, dev);
 663 }
 664
 665 int security_inode_rename(struct inode *old_dir, struct dentry *old_dentry,
 666                            struct inode *new_dir, struct dentry *new_dentry,
 667                            unsigned int flags)
 668 {
 669         if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) ||
 670             (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry)))))
 671                 return 0;
 672
 673         if (flags & RENAME_EXCHANGE) {
 674                 int err = call_int_hook(inode_rename, 0, new_dir, new_dentry,
 675                                                      old_dir, old_dentry);
 676                 if (err)
 677                         return err;
 678         }
 679
 680         return call_int_hook(inode_rename, 0, old_dir, old_dentry,
 681                                            new_dir, new_dentry);
 682 }
 683
 684 int security_inode_readlink(struct dentry *dentry)
 685 {
 686         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
 687                 return 0;
 688         return call_int_hook(inode_readlink, 0, dentry);
 689 }
 690
 691 int security_inode_follow_link(struct dentry *dentry, struct inode *inode,
 692                                bool rcu)
 693 {
 694         if (unlikely(IS_PRIVATE(inode)))
 695                 return 0;
 696         return call_int_hook(inode_follow_link, 0, dentry, inode, rcu);
 697 }
 698
 699 int security_inode_permission(struct inode *inode, int mask)
 700 {
 701         if (unlikely(IS_PRIVATE(inode)))
 702                 return 0;
 703         return call_int_hook(inode_permission, 0, inode, mask);
 704 }
 705
 706 int security_inode_setattr(struct dentry *dentry, struct iattr *attr)
 707 {
 708         int ret;
 709
 710         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
 711                 return 0;
 712         ret = call_int_hook(inode_setattr, 0, dentry, attr);
 713         if (ret)
 714                 return ret;
 715         return evm_inode_setattr(dentry, attr);
 716 }
 717 EXPORT_SYMBOL_GPL(security_inode_setattr);
 718
 719 int security_inode_getattr(const struct path *path)
 720 {
 721         if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
 722                 return 0;
 723         return call_int_hook(inode_getattr, 0, path);
 724 }
 725
 726 int security_inode_setxattr(struct dentry *dentry, const char *name,
 727                             const void *value, size_t size, int flags)
 728 {
 729         int ret;
 730
 731         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
 732                 return 0;
 733         /*
 734          * SELinux and Smack integrate the cap call,
 735          * so assume that all LSMs supplying this call do so.
 736          */
 737         ret = call_int_hook(inode_setxattr, 1, dentry, name, value, size,
 738                                 flags);
 739
 740         if (ret == 1)
 741                 ret = cap_inode_setxattr(dentry, name, value, size, flags);
 742         if (ret)
 743                 return ret;
 744         ret = ima_inode_setxattr(dentry, name, value, size);
 745         if (ret)
 746                 return ret;
 747         return evm_inode_setxattr(dentry, name, value, size);
 748 }
 749
 750 void security_inode_post_setxattr(struct dentry *dentry, const char *name,
 751                                   const void *value, size_t size, int flags)
 752 {
 753         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
 754                 return;
 755         call_void_hook(inode_post_setxattr, dentry, name, value, size, flags);
 756         evm_inode_post_setxattr(dentry, name, value, size);
 757 }
 758
 759 int security_inode_getxattr(struct dentry *dentry, const char *name)
 760 {
 761         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
 762                 return 0;
 763         return call_int_hook(inode_getxattr, 0, dentry, name);
 764 }
 765
 766 int security_inode_listxattr(struct dentry *dentry)
 767 {
 768         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
 769                 return 0;
 770         return call_int_hook(inode_listxattr, 0, dentry);
 771 }
 772
 773 int security_inode_removexattr(struct dentry *dentry, const char *name)
 774 {
 775         int ret;
 776
 777         if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
 778                 return 0;
 779         /*
 780          * SELinux and Smack integrate the cap call,
 781          * so assume that all LSMs supplying this call do so.
 782          */
 783         ret = call_int_hook(inode_removexattr, 1, dentry, name);
 784         if (ret == 1)
 785                 ret = cap_inode_removexattr(dentry, name);
 786         if (ret)
 787                 return ret;
 788         ret = ima_inode_removexattr(dentry, name);
 789         if (ret)
 790                 return ret;
 791         return evm_inode_removexattr(dentry, name);
 792 }
 793
 794 int security_inode_need_killpriv(struct dentry *dentry)
 795 {
 796         return call_int_hook(inode_need_killpriv, 0, dentry);
 797 }
 798
 799 int security_inode_killpriv(struct dentry *dentry)
 800 {
 801         return call_int_hook(inode_killpriv, 0, dentry);
 802 }
 803
 804 int security_inode_getsecurity(struct inode *inode, const char *name, void **buffer, bool alloc)
 805 {
 806         struct security_hook_list *hp;
 807         int rc;
 808
 809         if (unlikely(IS_PRIVATE(inode)))
 810                 return -EOPNOTSUPP;
 811         /*
 812          * Only one module will provide an attribute with a given name.
 813          */
 814         hlist_for_each_entry(hp, &security_hook_heads.inode_getsecurity, list) {
 815                 rc = hp->hook.inode_getsecurity(inode, name, buffer, alloc);
 816                 if (rc != -EOPNOTSUPP)
 817                         return rc;
 818         }
 819         return -EOPNOTSUPP;
 820 }
 821
 822 int security_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags)
 823 {
 824         struct security_hook_list *hp;
 825         int rc;
 826
 827         if (unlikely(IS_PRIVATE(inode)))
 828                 return -EOPNOTSUPP;
 829         /*
 830          * Only one module will provide an attribute with a given name.
 831          */
 832         hlist_for_each_entry(hp, &security_hook_heads.inode_setsecurity, list) {
 833                 rc = hp->hook.inode_setsecurity(inode, name, value, size,
 834                                                                 flags);
 835                 if (rc != -EOPNOTSUPP)
 836                         return rc;
 837         }
 838         return -EOPNOTSUPP;
 839 }
 840
 841 int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size)
 842 {
 843         if (unlikely(IS_PRIVATE(inode)))
 844                 return 0;
 845         return call_int_hook(inode_listsecurity, 0, inode, buffer, buffer_size);
 846 }
 847 EXPORT_SYMBOL(security_inode_listsecurity);
 848
 849 void security_inode_getsecid(struct inode *inode, u32 *secid)
 850 {
 851         call_void_hook(inode_getsecid, inode, secid);
 852 }
 853
 854 int security_inode_copy_up(struct dentry *src, struct cred **new)
 855 {
 856         return call_int_hook(inode_copy_up, 0, src, new);
 857 }
 858 EXPORT_SYMBOL(security_inode_copy_up);
 859
 860 int security_inode_copy_up_xattr(const char *name)
 861 {
 862         return call_int_hook(inode_copy_up_xattr, -EOPNOTSUPP, name);
 863 }
 864 EXPORT_SYMBOL(security_inode_copy_up_xattr);
 865
 866 int security_file_permission(struct file *file, int mask)
 867 {
 868         int ret;
 869
 870         ret = call_int_hook(file_permission, 0, file, mask);
 871         if (ret)
 872                 return ret;
 873
 874         return fsnotify_perm(file, mask);
 875 }
 876
 877 int security_file_alloc(struct file *file)
 878 {
 879         return call_int_hook(file_alloc_security, 0, file);
 880 }
 881
 882 void security_file_free(struct file *file)
 883 {
 884         call_void_hook(file_free_security, file);
 885 }
 886
 887 int security_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 888 {
 889         return call_int_hook(file_ioctl, 0, file, cmd, arg);
 890 }
 891
 892 static inline unsigned long mmap_prot(struct file *file, unsigned long prot)
 893 {
 894         /*
 895          * Does we have PROT_READ and does the application expect
 896          * it to imply PROT_EXEC?  If not, nothing to talk about...
 897          */
 898         if ((prot & (PROT_READ | PROT_EXEC)) != PROT_READ)
 899                 return prot;
 900         if (!(current->personality & READ_IMPLIES_EXEC))
 901                 return prot;
 902         /*
 903          * if that's an anonymous mapping, let it.
 904          */
 905         if (!file)
 906                 return prot | PROT_EXEC;
 907         /*
 908          * ditto if it's not on noexec mount, except that on !MMU we need
 909          * NOMMU_MAP_EXEC (== VM_MAYEXEC) in this case
 910          */
 911         if (!path_noexec(&file->f_path)) {
 912 #ifndef CONFIG_MMU
 913                 if (file->f_op->mmap_capabilities) {
 914                         unsigned caps = file->f_op->mmap_capabilities(file);
 915                         if (!(caps & NOMMU_MAP_EXEC))
 916                                 return prot;
 917                 }
 918 #endif
 919                 return prot | PROT_EXEC;
 920         }
 921         /* anything on noexec mount won't get PROT_EXEC */
 922         return prot;
 923 }
 924
 925 int security_mmap_file(struct file *file, unsigned long prot,
 926                         unsigned long flags)
 927 {
 928         int ret;
 929         ret = call_int_hook(mmap_file, 0, file, prot,
 930                                         mmap_prot(file, prot), flags);
 931         if (ret)
 932                 return ret;
 933         return ima_file_mmap(file, prot);
 934 }
 935
 936 int security_mmap_addr(unsigned long addr)
 937 {
 938         return call_int_hook(mmap_addr, 0, addr);
 939 }
 940
 941 int security_file_mprotect(struct vm_area_struct *vma, unsigned long reqprot,
 942                             unsigned long prot)
 943 {
 944         return call_int_hook(file_mprotect, 0, vma, reqprot, prot);
 945 }
 946
 947 int security_file_lock(struct file *file, unsigned int cmd)
 948 {
 949         return call_int_hook(file_lock, 0, file, cmd);
 950 }
 951
 952 int security_file_fcntl(struct file *file, unsigned int cmd, unsigned long arg)
 953 {
 954         return call_int_hook(file_fcntl, 0, file, cmd, arg);
 955 }
 956
 957 void security_file_set_fowner(struct file *file)
 958 {
 959         call_void_hook(file_set_fowner, file);
 960 }
 961
 962 int security_file_send_sigiotask(struct task_struct *tsk,
 963                                   struct fown_struct *fown, int sig)
 964 {
 965         return call_int_hook(file_send_sigiotask, 0, tsk, fown, sig);
 966 }
 967
 968 int security_file_receive(struct file *file)
 969 {
 970         return call_int_hook(file_receive, 0, file);
 971 }
 972
 973 int security_file_open(struct file *file, const struct cred *cred)
 974 {
 975         int ret;
 976
 977         ret = call_int_hook(file_open, 0, file, cred);
 978         if (ret)
 979                 return ret;
 980
 981         return fsnotify_perm(file, MAY_OPEN);
 982 }
 983
 984 int security_task_alloc(struct task_struct *task, unsigned long clone_flags)
 985 {
 986         return call_int_hook(task_alloc, 0, task, clone_flags);
 987 }
 988
 989 void security_task_free(struct task_struct *task)
 990 {
 991         call_void_hook(task_free, task);
 992 }
 993
 994 int security_cred_alloc_blank(struct cred *cred, gfp_t gfp)
 995 {
 996         return call_int_hook(cred_alloc_blank, 0, cred, gfp);
 997 }
 998
 999 void security_cred_free(struct cred *cred)
1000 {
1001         call_void_hook(cred_free, cred);
1002 }
1003
1004 int security_prepare_creds(struct cred *new, const struct cred *old, gfp_t gfp)
1005 {
1006         return call_int_hook(cred_prepare, 0, new, old, gfp);
1007 }
1008
1009 void security_transfer_creds(struct cred *new, const struct cred *old)
1010 {
1011         call_void_hook(cred_transfer, new, old);
1012 }
1013
1014 void security_cred_getsecid(const struct cred *c, u32 *secid)
1015 {
1016         *secid = 0;
1017         call_void_hook(cred_getsecid, c, secid);
1018 }
1019 EXPORT_SYMBOL(security_cred_getsecid);
1020
1021 int security_kernel_act_as(struct cred *new, u32 secid)
1022 {
1023         return call_int_hook(kernel_act_as, 0, new, secid);
1024 }
1025
1026 int security_kernel_create_files_as(struct cred *new, struct inode *inode)
1027 {
1028         return call_int_hook(kernel_create_files_as, 0, new, inode);
1029 }
1030
1031 int security_kernel_module_request(char *kmod_name)
1032 {
1033         return call_int_hook(kernel_module_request, 0, kmod_name);
1034 }
1035
1036 int security_kernel_read_file(struct file *file, enum kernel_read_file_id id)
1037 {
1038         int ret;
1039
1040         ret = call_int_hook(kernel_read_file, 0, file, id);
1041         if (ret)
1042                 return ret;
1043         return ima_read_file(file, id);
1044 }
1045 EXPORT_SYMBOL_GPL(security_kernel_read_file);
1046
1047 int security_kernel_post_read_file(struct file *file, char *buf, loff_t size,
1048                                    enum kernel_read_file_id id)
1049 {
1050         int ret;
1051
1052         ret = call_int_hook(kernel_post_read_file, 0, file, buf, size, id);
1053         if (ret)
1054                 return ret;
1055         return ima_post_read_file(file, buf, size, id);
1056 }
1057 EXPORT_SYMBOL_GPL(security_kernel_post_read_file);
1058
1059 int security_task_fix_setuid(struct cred *new, const struct cred *old,
1060                              int flags)
1061 {
1062         return call_int_hook(task_fix_setuid, 0, new, old, flags);
1063 }
1064
1065 int security_task_setpgid(struct task_struct *p, pid_t pgid)
1066 {
1067         return call_int_hook(task_setpgid, 0, p, pgid);
1068 }
1069
1070 int security_task_getpgid(struct task_struct *p)
1071 {
1072         return call_int_hook(task_getpgid, 0, p);
1073 }
1074
1075 int security_task_getsid(struct task_struct *p)
1076 {
1077         return call_int_hook(task_getsid, 0, p);
1078 }
1079
1080 void security_task_getsecid(struct task_struct *p, u32 *secid)
1081 {
1082         *secid = 0;
1083         call_void_hook(task_getsecid, p, secid);
1084 }
1085 EXPORT_SYMBOL(security_task_getsecid);
1086
1087 int security_task_setnice(struct task_struct *p, int nice)
1088 {
1089         return call_int_hook(task_setnice, 0, p, nice);
1090 }
1091
1092 int security_task_setioprio(struct task_struct *p, int ioprio)
1093 {
1094         return call_int_hook(task_setioprio, 0, p, ioprio);
1095 }
1096
1097 int security_task_getioprio(struct task_struct *p)
1098 {
1099         return call_int_hook(task_getioprio, 0, p);
1100 }
1101
1102 int security_task_prlimit(const struct cred *cred, const struct cred *tcred,
1103                           unsigned int flags)
1104 {
1105         return call_int_hook(task_prlimit, 0, cred, tcred, flags);
1106 }
1107
1108 int security_task_setrlimit(struct task_struct *p, unsigned int resource,
1109                 struct rlimit *new_rlim)
1110 {
1111         return call_int_hook(task_setrlimit, 0, p, resource, new_rlim);
1112 }
1113
1114 int security_task_setscheduler(struct task_struct *p)
1115 {
1116         return call_int_hook(task_setscheduler, 0, p);
1117 }
1118
1119 int security_task_getscheduler(struct task_struct *p)
1120 {
1121         return call_int_hook(task_getscheduler, 0, p);
1122 }
1123
1124 int security_task_movememory(struct task_struct *p)
1125 {
1126         return call_int_hook(task_movememory, 0, p);
1127 }
1128
1129 int security_task_kill(struct task_struct *p, struct siginfo *info,
1130                         int sig, const struct cred *cred)
1131 {
1132         return call_int_hook(task_kill, 0, p, info, sig, cred);
1133 }
1134
1135 int security_task_prctl(int option, unsigned long arg2, unsigned long arg3,
1136                          unsigned long arg4, unsigned long arg5)
1137 {
1138         int thisrc;
1139         int rc = -ENOSYS;
1140         struct security_hook_list *hp;
1141
1142         hlist_for_each_entry(hp, &security_hook_heads.task_prctl, list) {
1143                 thisrc = hp->hook.task_prctl(option, arg2, arg3, arg4, arg5);
1144                 if (thisrc != -ENOSYS) {
1145                         rc = thisrc;
1146                         if (thisrc != 0)
1147                                 break;
1148                 }
1149         }
1150         return rc;
1151 }
1152
1153 void security_task_to_inode(struct task_struct *p, struct inode *inode)
1154 {
1155         call_void_hook(task_to_inode, p, inode);
1156 }
1157
1158 int security_ipc_permission(struct kern_ipc_perm *ipcp, short flag)
1159 {
1160         return call_int_hook(ipc_permission, 0, ipcp, flag);
1161 }
1162
1163 void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid)
1164 {
1165         *secid = 0;
1166         call_void_hook(ipc_getsecid, ipcp, secid);
1167 }
1168
1169 int security_msg_msg_alloc(struct msg_msg *msg)
1170 {
1171         return call_int_hook(msg_msg_alloc_security, 0, msg);
1172 }
1173
1174 void security_msg_msg_free(struct msg_msg *msg)
1175 {
1176         call_void_hook(msg_msg_free_security, msg);
1177 }
1178
1179 int security_msg_queue_alloc(struct kern_ipc_perm *msq)
1180 {
1181         return call_int_hook(msg_queue_alloc_security, 0, msq);
1182 }
1183
1184 void security_msg_queue_free(struct kern_ipc_perm *msq)
1185 {
1186         call_void_hook(msg_queue_free_security, msq);
1187 }
1188
1189 int security_msg_queue_associate(struct kern_ipc_perm *msq, int msqflg)
1190 {
1191         return call_int_hook(msg_queue_associate, 0, msq, msqflg);
1192 }
1193
1194 int security_msg_queue_msgctl(struct kern_ipc_perm *msq, int cmd)
1195 {
1196         return call_int_hook(msg_queue_msgctl, 0, msq, cmd);
1197 }
1198
1199 int security_msg_queue_msgsnd(struct kern_ipc_perm *msq,
1200                                struct msg_msg *msg, int msqflg)
1201 {
1202         return call_int_hook(msg_queue_msgsnd, 0, msq, msg, msqflg);
1203 }
1204
1205 int security_msg_queue_msgrcv(struct kern_ipc_perm *msq, struct msg_msg *msg,
1206                                struct task_struct *target, long type, int mode)
1207 {
1208         return call_int_hook(msg_queue_msgrcv, 0, msq, msg, target, type, mode);
1209 }
1210
1211 int security_shm_alloc(struct kern_ipc_perm *shp)
1212 {
1213         return call_int_hook(shm_alloc_security, 0, shp);
1214 }
1215
1216 void security_shm_free(struct kern_ipc_perm *shp)
1217 {
1218         call_void_hook(shm_free_security, shp);
1219 }
1220
1221 int security_shm_associate(struct kern_ipc_perm *shp, int shmflg)
1222 {
1223         return call_int_hook(shm_associate, 0, shp, shmflg);
1224 }
1225
1226 int security_shm_shmctl(struct kern_ipc_perm *shp, int cmd)
1227 {
1228         return call_int_hook(shm_shmctl, 0, shp, cmd);
1229 }
1230
1231 int security_shm_shmat(struct kern_ipc_perm *shp, char __user *shmaddr, int shmflg)
1232 {
1233         return call_int_hook(shm_shmat, 0, shp, shmaddr, shmflg);
1234 }
1235
1236 int security_sem_alloc(struct kern_ipc_perm *sma)
1237 {
1238         return call_int_hook(sem_alloc_security, 0, sma);
1239 }
1240
1241 void security_sem_free(struct kern_ipc_perm *sma)
1242 {
1243         call_void_hook(sem_free_security, sma);
1244 }
1245
1246 int security_sem_associate(struct kern_ipc_perm *sma, int semflg)
1247 {
1248         return call_int_hook(sem_associate, 0, sma, semflg);
1249 }
1250
1251 int security_sem_semctl(struct kern_ipc_perm *sma, int cmd)
1252 {
1253         return call_int_hook(sem_semctl, 0, sma, cmd);
1254 }
1255
1256 int security_sem_semop(struct kern_ipc_perm *sma, struct sembuf *sops,
1257                         unsigned nsops, int alter)
1258 {
1259         return call_int_hook(sem_semop, 0, sma, sops, nsops, alter);
1260 }
1261
1262 void security_d_instantiate(struct dentry *dentry, struct inode *inode)
1263 {
1264         if (unlikely(inode && IS_PRIVATE(inode)))
1265                 return;
1266         call_void_hook(d_instantiate, dentry, inode);
1267 }
1268 EXPORT_SYMBOL(security_d_instantiate);
1269
1270 int security_getprocattr(struct task_struct *p, char *name, char **value)
1271 {
1272         return call_int_hook(getprocattr, -EINVAL, p, name, value);
1273 }
1274
1275 int security_setprocattr(const char *name, void *value, size_t size)
1276 {
1277         return call_int_hook(setprocattr, -EINVAL, name, value, size);
1278 }
1279
1280 int security_netlink_send(struct sock *sk, struct sk_buff *skb)
1281 {
1282         return call_int_hook(netlink_send, 0, sk, skb);
1283 }
1284
1285 int security_ismaclabel(const char *name)
1286 {
1287         return call_int_hook(ismaclabel, 0, name);
1288 }
1289 EXPORT_SYMBOL(security_ismaclabel);
1290
1291 int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
1292 {
1293         return call_int_hook(secid_to_secctx, -EOPNOTSUPP, secid, secdata,
1294                                 seclen);
1295 }
1296 EXPORT_SYMBOL(security_secid_to_secctx);
1297
1298 int security_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid)
1299 {
1300         *secid = 0;
1301         return call_int_hook(secctx_to_secid, 0, secdata, seclen, secid);
1302 }
1303 EXPORT_SYMBOL(security_secctx_to_secid);
1304
1305 void security_release_secctx(char *secdata, u32 seclen)
1306 {
1307         call_void_hook(release_secctx, secdata, seclen);
1308 }
1309 EXPORT_SYMBOL(security_release_secctx);
1310
1311 void security_inode_invalidate_secctx(struct inode *inode)
1312 {
1313         call_void_hook(inode_invalidate_secctx, inode);
1314 }
1315 EXPORT_SYMBOL(security_inode_invalidate_secctx);
1316
1317 int security_inode_notifysecctx(struct inode *inode, void *ctx, u32 ctxlen)
1318 {
1319         return call_int_hook(inode_notifysecctx, 0, inode, ctx, ctxlen);
1320 }
1321 EXPORT_SYMBOL(security_inode_notifysecctx);
1322
1323 int security_inode_setsecctx(struct dentry *dentry, void *ctx, u32 ctxlen)
1324 {
1325         return call_int_hook(inode_setsecctx, 0, dentry, ctx, ctxlen);
1326 }
1327 EXPORT_SYMBOL(security_inode_setsecctx);
1328
1329 int security_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen)
1330 {
1331         return call_int_hook(inode_getsecctx, -EOPNOTSUPP, inode, ctx, ctxlen);
1332 }
1333 EXPORT_SYMBOL(security_inode_getsecctx);
1334
1335 #ifdef CONFIG_SECURITY_NETWORK
1336
1337 int security_unix_stream_connect(struct sock *sock, struct sock *other, struct sock *newsk)
1338 {
1339         return call_int_hook(unix_stream_connect, 0, sock, other, newsk);
1340 }
1341 EXPORT_SYMBOL(security_unix_stream_connect);
1342
1343 int security_unix_may_send(struct socket *sock,  struct socket *other)
1344 {
1345         return call_int_hook(unix_may_send, 0, sock, other);
1346 }
1347 EXPORT_SYMBOL(security_unix_may_send);
1348
1349 int security_socket_create(int family, int type, int protocol, int kern)
1350 {
1351         return call_int_hook(socket_create, 0, family, type, protocol, kern);
1352 }
1353
1354 int security_socket_post_create(struct socket *sock, int family,
1355                                 int type, int protocol, int kern)
1356 {
1357         return call_int_hook(socket_post_create, 0, sock, family, type,
1358                                                 protocol, kern);
1359 }
1360
1361 int security_socket_bind(struct socket *sock, struct sockaddr *address, int addrlen)
1362 {
1363         return call_int_hook(socket_bind, 0, sock, address, addrlen);
1364 }
1365
1366 int security_socket_connect(struct socket *sock, struct sockaddr *address, int addrlen)
1367 {
1368         return call_int_hook(socket_connect, 0, sock, address, addrlen);
1369 }
1370
1371 int security_socket_listen(struct socket *sock, int backlog)
1372 {
1373         return call_int_hook(socket_listen, 0, sock, backlog);
1374 }
1375
1376 int security_socket_accept(struct socket *sock, struct socket *newsock)
1377 {
1378         return call_int_hook(socket_accept, 0, sock, newsock);
1379 }
1380
1381 int security_socket_sendmsg(struct socket *sock, struct msghdr *msg, int size)
1382 {
1383         return call_int_hook(socket_sendmsg, 0, sock, msg, size);
1384 }
1385
1386 int security_socket_recvmsg(struct socket *sock, struct msghdr *msg,
1387                             int size, int flags)
1388 {
1389         return call_int_hook(socket_recvmsg, 0, sock, msg, size, flags);
1390 }
1391
1392 int security_socket_getsockname(struct socket *sock)
1393 {
1394         return call_int_hook(socket_getsockname, 0, sock);
1395 }
1396
1397 int security_socket_getpeername(struct socket *sock)
1398 {
1399         return call_int_hook(socket_getpeername, 0, sock);
1400 }
1401
1402 int security_socket_getsockopt(struct socket *sock, int level, int optname)
1403 {
1404         return call_int_hook(socket_getsockopt, 0, sock, level, optname);
1405 }
1406
1407 int security_socket_setsockopt(struct socket *sock, int level, int optname)
1408 {
1409         return call_int_hook(socket_setsockopt, 0, sock, level, optname);
1410 }
1411
1412 int security_socket_shutdown(struct socket *sock, int how)
1413 {
1414         return call_int_hook(socket_shutdown, 0, sock, how);
1415 }
1416
1417 int security_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
1418 {
1419         return call_int_hook(socket_sock_rcv_skb, 0, sk, skb);
1420 }
1421 EXPORT_SYMBOL(security_sock_rcv_skb);
1422
1423 int security_socket_getpeersec_stream(struct socket *sock, char __user *optval,
1424                                       int __user *optlen, unsigned len)
1425 {
1426         return call_int_hook(socket_getpeersec_stream, -ENOPROTOOPT, sock,
1427                                 optval, optlen, len);
1428 }
1429
1430 int security_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb, u32 *secid)
1431 {
1432         return call_int_hook(socket_getpeersec_dgram, -ENOPROTOOPT, sock,
1433                              skb, secid);
1434 }
1435 EXPORT_SYMBOL(security_socket_getpeersec_dgram);
1436
1437 int security_sk_alloc(struct sock *sk, int family, gfp_t priority)
1438 {
1439         return call_int_hook(sk_alloc_security, 0, sk, family, priority);
1440 }
1441
1442 void security_sk_free(struct sock *sk)
1443 {
1444         call_void_hook(sk_free_security, sk);
1445 }
1446
1447 void security_sk_clone(const struct sock *sk, struct sock *newsk)
1448 {
1449         call_void_hook(sk_clone_security, sk, newsk);
1450 }
1451 EXPORT_SYMBOL(security_sk_clone);
1452
1453 void security_sk_classify_flow(struct sock *sk, struct flowi *fl)
1454 {
1455         call_void_hook(sk_getsecid, sk, &fl->flowi_secid);
1456 }
1457 EXPORT_SYMBOL(security_sk_classify_flow);
1458
1459 void security_req_classify_flow(const struct request_sock *req, struct flowi *fl)
1460 {
1461         call_void_hook(req_classify_flow, req, fl);
1462 }
1463 EXPORT_SYMBOL(security_req_classify_flow);
1464
1465 void security_sock_graft(struct sock *sk, struct socket *parent)
1466 {
1467         call_void_hook(sock_graft, sk, parent);
1468 }
1469 EXPORT_SYMBOL(security_sock_graft);
1470
1471 int security_inet_conn_request(struct sock *sk,
1472                         struct sk_buff *skb, struct request_sock *req)
1473 {
1474         return call_int_hook(inet_conn_request, 0, sk, skb, req);
1475 }
1476 EXPORT_SYMBOL(security_inet_conn_request);
1477
1478 void security_inet_csk_clone(struct sock *newsk,
1479                         const struct request_sock *req)
1480 {
1481         call_void_hook(inet_csk_clone, newsk, req);
1482 }
1483
1484 void security_inet_conn_established(struct sock *sk,
1485                         struct sk_buff *skb)
1486 {
1487         call_void_hook(inet_conn_established, sk, skb);
1488 }
1489 EXPORT_SYMBOL(security_inet_conn_established);
1490
1491 int security_secmark_relabel_packet(u32 secid)
1492 {
1493         return call_int_hook(secmark_relabel_packet, 0, secid);
1494 }
1495 EXPORT_SYMBOL(security_secmark_relabel_packet);
1496
1497 void security_secmark_refcount_inc(void)
1498 {
1499         call_void_hook(secmark_refcount_inc);
1500 }
1501 EXPORT_SYMBOL(security_secmark_refcount_inc);
1502
1503 void security_secmark_refcount_dec(void)
1504 {
1505         call_void_hook(secmark_refcount_dec);
1506 }
1507 EXPORT_SYMBOL(security_secmark_refcount_dec);
1508
1509 int security_tun_dev_alloc_security(void **security)
1510 {
1511         return call_int_hook(tun_dev_alloc_security, 0, security);
1512 }
1513 EXPORT_SYMBOL(security_tun_dev_alloc_security);
1514
1515 void security_tun_dev_free_security(void *security)
1516 {
1517         call_void_hook(tun_dev_free_security, security);
1518 }
1519 EXPORT_SYMBOL(security_tun_dev_free_security);
1520
1521 int security_tun_dev_create(void)
1522 {
1523         return call_int_hook(tun_dev_create, 0);
1524 }
1525 EXPORT_SYMBOL(security_tun_dev_create);
1526
1527 int security_tun_dev_attach_queue(void *security)
1528 {
1529         return call_int_hook(tun_dev_attach_queue, 0, security);
1530 }
1531 EXPORT_SYMBOL(security_tun_dev_attach_queue);
1532
1533 int security_tun_dev_attach(struct sock *sk, void *security)
1534 {
1535         return call_int_hook(tun_dev_attach, 0, sk, security);
1536 }
1537 EXPORT_SYMBOL(security_tun_dev_attach);
1538
1539 int security_tun_dev_open(void *security)
1540 {
1541         return call_int_hook(tun_dev_open, 0, security);
1542 }
1543 EXPORT_SYMBOL(security_tun_dev_open);
1544
1545 int security_sctp_assoc_request(struct sctp_endpoint *ep, struct sk_buff *skb)
1546 {
1547         return call_int_hook(sctp_assoc_request, 0, ep, skb);
1548 }
1549 EXPORT_SYMBOL(security_sctp_assoc_request);
1550
1551 int security_sctp_bind_connect(struct sock *sk, int optname,
1552                                struct sockaddr *address, int addrlen)
1553 {
1554         return call_int_hook(sctp_bind_connect, 0, sk, optname,
1555                              address, addrlen);
1556 }
1557 EXPORT_SYMBOL(security_sctp_bind_connect);
1558
1559 void security_sctp_sk_clone(struct sctp_endpoint *ep, struct sock *sk,
1560                             struct sock *newsk)
1561 {
1562         call_void_hook(sctp_sk_clone, ep, sk, newsk);
1563 }
1564 EXPORT_SYMBOL(security_sctp_sk_clone);
1565
1566 #endif  /* CONFIG_SECURITY_NETWORK */
1567
1568 #ifdef CONFIG_SECURITY_INFINIBAND
1569
1570 int security_ib_pkey_access(void *sec, u64 subnet_prefix, u16 pkey)
1571 {
1572         return call_int_hook(ib_pkey_access, 0, sec, subnet_prefix, pkey);
1573 }
1574 EXPORT_SYMBOL(security_ib_pkey_access);
1575
1576 int security_ib_endport_manage_subnet(void *sec, const char *dev_name, u8 port_num)
1577 {
1578         return call_int_hook(ib_endport_manage_subnet, 0, sec, dev_name, port_num);
1579 }
1580 EXPORT_SYMBOL(security_ib_endport_manage_subnet);
1581
1582 int security_ib_alloc_security(void **sec)
1583 {
1584         return call_int_hook(ib_alloc_security, 0, sec);
1585 }
1586 EXPORT_SYMBOL(security_ib_alloc_security);
1587
1588 void security_ib_free_security(void *sec)
1589 {
1590         call_void_hook(ib_free_security, sec);
1591 }
1592 EXPORT_SYMBOL(security_ib_free_security);
1593 #endif  /* CONFIG_SECURITY_INFINIBAND */
1594
1595 #ifdef CONFIG_SECURITY_NETWORK_XFRM
1596
1597 int security_xfrm_policy_alloc(struct xfrm_sec_ctx **ctxp,
1598                                struct xfrm_user_sec_ctx *sec_ctx,
1599                                gfp_t gfp)
1600 {
1601         return call_int_hook(xfrm_policy_alloc_security, 0, ctxp, sec_ctx, gfp);
1602 }
1603 EXPORT_SYMBOL(security_xfrm_policy_alloc);
1604
1605 int security_xfrm_policy_clone(struct xfrm_sec_ctx *old_ctx,
1606                               struct xfrm_sec_ctx **new_ctxp)
1607 {
1608         return call_int_hook(xfrm_policy_clone_security, 0, old_ctx, new_ctxp);
1609 }
1610
1611 void security_xfrm_policy_free(struct xfrm_sec_ctx *ctx)
1612 {
1613         call_void_hook(xfrm_policy_free_security, ctx);
1614 }
1615 EXPORT_SYMBOL(security_xfrm_policy_free);
1616
1617 int security_xfrm_policy_delete(struct xfrm_sec_ctx *ctx)
1618 {
1619         return call_int_hook(xfrm_policy_delete_security, 0, ctx);
1620 }
1621
1622 int security_xfrm_state_alloc(struct xfrm_state *x,
1623                               struct xfrm_user_sec_ctx *sec_ctx)
1624 {
1625         return call_int_hook(xfrm_state_alloc, 0, x, sec_ctx);
1626 }
1627 EXPORT_SYMBOL(security_xfrm_state_alloc);
1628
1629 int security_xfrm_state_alloc_acquire(struct xfrm_state *x,
1630                                       struct xfrm_sec_ctx *polsec, u32 secid)
1631 {
1632         return call_int_hook(xfrm_state_alloc_acquire, 0, x, polsec, secid);
1633 }
1634
1635 int security_xfrm_state_delete(struct xfrm_state *x)
1636 {
1637         return call_int_hook(xfrm_state_delete_security, 0, x);
1638 }
1639 EXPORT_SYMBOL(security_xfrm_state_delete);
1640
1641 void security_xfrm_state_free(struct xfrm_state *x)
1642 {
1643         call_void_hook(xfrm_state_free_security, x);
1644 }
1645
1646 int security_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir)
1647 {
1648         return call_int_hook(xfrm_policy_lookup, 0, ctx, fl_secid, dir);
1649 }
1650
1651 int security_xfrm_state_pol_flow_match(struct xfrm_state *x,
1652                                        struct xfrm_policy *xp,
1653                                        const struct flowi *fl)
1654 {
1655         struct security_hook_list *hp;
1656         int rc = 1;
1657
1658         /*
1659          * Since this function is expected to return 0 or 1, the judgment
1660          * becomes difficult if multiple LSMs supply this call. Fortunately,
1661          * we can use the first LSM's judgment because currently only SELinux
1662          * supplies this call.
1663          *
1664          * For speed optimization, we explicitly break the loop rather than
1665          * using the macro
1666          */
1667         hlist_for_each_entry(hp, &security_hook_heads.xfrm_state_pol_flow_match,
1668                                 list) {
1669                 rc = hp->hook.xfrm_state_pol_flow_match(x, xp, fl);
1670                 break;
1671         }
1672         return rc;
1673 }
1674
1675 int security_xfrm_decode_session(struct sk_buff *skb, u32 *secid)
1676 {
1677         return call_int_hook(xfrm_decode_session, 0, skb, secid, 1);
1678 }
1679
1680 void security_skb_classify_flow(struct sk_buff *skb, struct flowi *fl)
1681 {
1682         int rc = call_int_hook(xfrm_decode_session, 0, skb, &fl->flowi_secid,
1683                                 0);
1684
1685         BUG_ON(rc);
1686 }
1687 EXPORT_SYMBOL(security_skb_classify_flow);
1688
1689 #endif  /* CONFIG_SECURITY_NETWORK_XFRM */
1690
1691 #ifdef CONFIG_KEYS
1692
1693 int security_key_alloc(struct key *key, const struct cred *cred,
1694                        unsigned long flags)
1695 {
1696         return call_int_hook(key_alloc, 0, key, cred, flags);
1697 }
1698
1699 void security_key_free(struct key *key)
1700 {
1701         call_void_hook(key_free, key);
1702 }
1703
1704 int security_key_permission(key_ref_t key_ref,
1705                             const struct cred *cred, unsigned perm)
1706 {
1707         return call_int_hook(key_permission, 0, key_ref, cred, perm);
1708 }
1709
1710 int security_key_getsecurity(struct key *key, char **_buffer)
1711 {
1712         *_buffer = NULL;
1713         return call_int_hook(key_getsecurity, 0, key, _buffer);
1714 }
1715
1716 #endif  /* CONFIG_KEYS */
1717
1718 #ifdef CONFIG_AUDIT
1719
1720 int security_audit_rule_init(u32 field, u32 op, char *rulestr, void **lsmrule)
1721 {
1722         return call_int_hook(audit_rule_init, 0, field, op, rulestr, lsmrule);
1723 }
1724
1725 int security_audit_rule_known(struct audit_krule *krule)
1726 {
1727         return call_int_hook(audit_rule_known, 0, krule);
1728 }
1729
1730 void security_audit_rule_free(void *lsmrule)
1731 {
1732         call_void_hook(audit_rule_free, lsmrule);
1733 }
1734
1735 int security_audit_rule_match(u32 secid, u32 field, u32 op, void *lsmrule,
1736                               struct audit_context *actx)
1737 {
1738         return call_int_hook(audit_rule_match, 0, secid, field, op, lsmrule,
1739                                 actx);
1740 }
1741 #endif /* CONFIG_AUDIT */
1742
1743 #ifdef CONFIG_BPF_SYSCALL
1744 int security_bpf(int cmd, union bpf_attr *attr, unsigned int size)
1745 {
1746         return call_int_hook(bpf, 0, cmd, attr, size);
1747 }
1748 int security_bpf_map(struct bpf_map *map, fmode_t fmode)
1749 {
1750         return call_int_hook(bpf_map, 0, map, fmode);
1751 }
1752 int security_bpf_prog(struct bpf_prog *prog)
1753 {
1754         return call_int_hook(bpf_prog, 0, prog);
1755 }
1756 int security_bpf_map_alloc(struct bpf_map *map)
1757 {
1758         return call_int_hook(bpf_map_alloc_security, 0, map);
1759 }
1760 int security_bpf_prog_alloc(struct bpf_prog_aux *aux)
1761 {
1762         return call_int_hook(bpf_prog_alloc_security, 0, aux);
1763 }
1764 void security_bpf_map_free(struct bpf_map *map)
1765 {
1766         call_void_hook(bpf_map_free_security, map);
1767 }
1768 void security_bpf_prog_free(struct bpf_prog_aux *aux)
1769 {
1770         call_void_hook(bpf_prog_free_security, aux);
1771 }
1772 #endif /* CONFIG_BPF_SYSCALL */