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