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 #define pr_fmt(fmt) "LSM: " fmt 16 17 #include <linux/bpf.h> 18 #include <linux/capability.h> 19 #include <linux/dcache.h> 20 #include <linux/export.h> 21 #include <linux/init.h> 22 #include <linux/kernel.h> 23 #include <linux/lsm_hooks.h> 24 #include <linux/integrity.h> 25 #include <linux/ima.h> 26 #include <linux/evm.h> 27 #include <linux/fsnotify.h> 28 #include <linux/mman.h> 29 #include <linux/mount.h> 30 #include <linux/personality.h> 31 #include <linux/backing-dev.h> 32 #include <linux/string.h> 33 #include <net/flow.h> 34 35 #define MAX_LSM_EVM_XATTR 2 36 37 /* How many LSMs were built into the kernel? */ 38 #define LSM_COUNT (__end_lsm_info - __start_lsm_info) 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 const char *chosen_lsm_order; 46 static __initdata const char *chosen_major_lsm; 47 48 static __initconst const char * const builtin_lsm_order = CONFIG_LSM; 49 50 /* Ordered list of LSMs to initialize. */ 51 static __initdata struct lsm_info **ordered_lsms; 52 static __initdata struct lsm_info *exclusive; 53 54 static __initdata bool debug; 55 #define init_debug(...) \ 56 do { \ 57 if (debug) \ 58 pr_info(__VA_ARGS__); \ 59 } while (0) 60 61 static bool __init is_enabled(struct lsm_info *lsm) 62 { 63 if (!lsm->enabled) 64 return false; 65 66 return *lsm->enabled; 67 } 68 69 /* Mark an LSM's enabled flag. */ 70 static int lsm_enabled_true __initdata = 1; 71 static int lsm_enabled_false __initdata = 0; 72 static void __init set_enabled(struct lsm_info *lsm, bool enabled) 73 { 74 /* 75 * When an LSM hasn't configured an enable variable, we can use 76 * a hard-coded location for storing the default enabled state. 77 */ 78 if (!lsm->enabled) { 79 if (enabled) 80 lsm->enabled = &lsm_enabled_true; 81 else 82 lsm->enabled = &lsm_enabled_false; 83 } else if (lsm->enabled == &lsm_enabled_true) { 84 if (!enabled) 85 lsm->enabled = &lsm_enabled_false; 86 } else if (lsm->enabled == &lsm_enabled_false) { 87 if (enabled) 88 lsm->enabled = &lsm_enabled_true; 89 } else { 90 *lsm->enabled = enabled; 91 } 92 } 93 94 /* Is an LSM already listed in the ordered LSMs list? */ 95 static bool __init exists_ordered_lsm(struct lsm_info *lsm) 96 { 97 struct lsm_info **check; 98 99 for (check = ordered_lsms; *check; check++) 100 if (*check == lsm) 101 return true; 102 103 return false; 104 } 105 106 /* Append an LSM to the list of ordered LSMs to initialize. */ 107 static int last_lsm __initdata; 108 static void __init append_ordered_lsm(struct lsm_info *lsm, const char *from) 109 { 110 /* Ignore duplicate selections. */ 111 if (exists_ordered_lsm(lsm)) 112 return; 113 114 if (WARN(last_lsm == LSM_COUNT, "%s: out of LSM slots!?\n", from)) 115 return; 116 117 /* Enable this LSM, if it is not already set. */ 118 if (!lsm->enabled) 119 lsm->enabled = &lsm_enabled_true; 120 ordered_lsms[last_lsm++] = lsm; 121 122 init_debug("%s ordering: %s (%sabled)\n", from, lsm->name, 123 is_enabled(lsm) ? "en" : "dis"); 124 } 125 126 /* Is an LSM allowed to be initialized? */ 127 static bool __init lsm_allowed(struct lsm_info *lsm) 128 { 129 /* Skip if the LSM is disabled. */ 130 if (!is_enabled(lsm)) 131 return false; 132 133 /* Not allowed if another exclusive LSM already initialized. */ 134 if ((lsm->flags & LSM_FLAG_EXCLUSIVE) && exclusive) { 135 init_debug("exclusive disabled: %s\n", lsm->name); 136 return false; 137 } 138 139 return true; 140 } 141 142 /* Prepare LSM for initialization. */ 143 static void __init prepare_lsm(struct lsm_info *lsm) 144 { 145 int enabled = lsm_allowed(lsm); 146 147 /* Record enablement (to handle any following exclusive LSMs). */ 148 set_enabled(lsm, enabled); 149 150 /* If enabled, do pre-initialization work. */ 151 if (enabled) { 152 if ((lsm->flags & LSM_FLAG_EXCLUSIVE) && !exclusive) { 153 exclusive = lsm; 154 init_debug("exclusive chosen: %s\n", lsm->name); 155 } 156 } 157 } 158 159 /* Initialize a given LSM, if it is enabled. */ 160 static void __init initialize_lsm(struct lsm_info *lsm) 161 { 162 if (is_enabled(lsm)) { 163 int ret; 164 165 init_debug("initializing %s\n", lsm->name); 166 ret = lsm->init(); 167 WARN(ret, "%s failed to initialize: %d\n", lsm->name, ret); 168 } 169 } 170 171 /* Populate ordered LSMs list from comma-separated LSM name list. */ 172 static void __init ordered_lsm_parse(const char *order, const char *origin) 173 { 174 struct lsm_info *lsm; 175 char *sep, *name, *next; 176 177 /* LSM_ORDER_FIRST is always first. */ 178 for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) { 179 if (lsm->order == LSM_ORDER_FIRST) 180 append_ordered_lsm(lsm, "first"); 181 } 182 183 /* Process "security=", if given. */ 184 if (chosen_major_lsm) { 185 struct lsm_info *major; 186 187 /* 188 * To match the original "security=" behavior, this 189 * explicitly does NOT fallback to another Legacy Major 190 * if the selected one was separately disabled: disable 191 * all non-matching Legacy Major LSMs. 192 */ 193 for (major = __start_lsm_info; major < __end_lsm_info; 194 major++) { 195 if ((major->flags & LSM_FLAG_LEGACY_MAJOR) && 196 strcmp(major->name, chosen_major_lsm) != 0) { 197 set_enabled(major, false); 198 init_debug("security=%s disabled: %s\n", 199 chosen_major_lsm, major->name); 200 } 201 } 202 } 203 204 sep = kstrdup(order, GFP_KERNEL); 205 next = sep; 206 /* Walk the list, looking for matching LSMs. */ 207 while ((name = strsep(&next, ",")) != NULL) { 208 bool found = false; 209 210 for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) { 211 if (lsm->order == LSM_ORDER_MUTABLE && 212 strcmp(lsm->name, name) == 0) { 213 append_ordered_lsm(lsm, origin); 214 found = true; 215 } 216 } 217 218 if (!found) 219 init_debug("%s ignored: %s\n", origin, name); 220 } 221 222 /* Process "security=", if given. */ 223 if (chosen_major_lsm) { 224 for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) { 225 if (exists_ordered_lsm(lsm)) 226 continue; 227 if (strcmp(lsm->name, chosen_major_lsm) == 0) 228 append_ordered_lsm(lsm, "security="); 229 } 230 } 231 232 /* Disable all LSMs not in the ordered list. */ 233 for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) { 234 if (exists_ordered_lsm(lsm)) 235 continue; 236 set_enabled(lsm, false); 237 init_debug("%s disabled: %s\n", origin, lsm->name); 238 } 239 240 kfree(sep); 241 } 242 243 static void __init ordered_lsm_init(void) 244 { 245 struct lsm_info **lsm; 246 247 ordered_lsms = kcalloc(LSM_COUNT + 1, sizeof(*ordered_lsms), 248 GFP_KERNEL); 249 250 if (chosen_lsm_order) 251 ordered_lsm_parse(chosen_lsm_order, "cmdline"); 252 else 253 ordered_lsm_parse(builtin_lsm_order, "builtin"); 254 255 for (lsm = ordered_lsms; *lsm; lsm++) 256 prepare_lsm(*lsm); 257 258 for (lsm = ordered_lsms; *lsm; lsm++) 259 initialize_lsm(*lsm); 260 261 kfree(ordered_lsms); 262 } 263 264 /** 265 * security_init - initializes the security framework 266 * 267 * This should be called early in the kernel initialization sequence. 268 */ 269 int __init security_init(void) 270 { 271 int i; 272 struct hlist_head *list = (struct hlist_head *) &security_hook_heads; 273 274 pr_info("Security Framework initializing\n"); 275 276 for (i = 0; i < sizeof(security_hook_heads) / sizeof(struct hlist_head); 277 i++) 278 INIT_HLIST_HEAD(&list[i]); 279 280 /* 281 * Load minor LSMs, with the capability module always first. 282 */ 283 capability_add_hooks(); 284 285 /* Load LSMs in specified order. */ 286 ordered_lsm_init(); 287 288 return 0; 289 } 290 291 /* Save user chosen LSM */ 292 static int __init choose_major_lsm(char *str) 293 { 294 chosen_major_lsm = str; 295 return 1; 296 } 297 __setup("security=", choose_major_lsm); 298 299 /* Explicitly choose LSM initialization order. */ 300 static int __init choose_lsm_order(char *str) 301 { 302 chosen_lsm_order = str; 303 return 1; 304 } 305 __setup("lsm=", choose_lsm_order); 306 307 /* Enable LSM order debugging. */ 308 static int __init enable_debug(char *str) 309 { 310 debug = true; 311 return 1; 312 } 313 __setup("lsm.debug", enable_debug); 314 315 static bool match_last_lsm(const char *list, const char *lsm) 316 { 317 const char *last; 318 319 if (WARN_ON(!list || !lsm)) 320 return false; 321 last = strrchr(list, ','); 322 if (last) 323 /* Pass the comma, strcmp() will check for '\0' */ 324 last++; 325 else 326 last = list; 327 return !strcmp(last, lsm); 328 } 329 330 static int lsm_append(char *new, char **result) 331 { 332 char *cp; 333 334 if (*result == NULL) { 335 *result = kstrdup(new, GFP_KERNEL); 336 if (*result == NULL) 337 return -ENOMEM; 338 } else { 339 /* Check if it is the last registered name */ 340 if (match_last_lsm(*result, new)) 341 return 0; 342 cp = kasprintf(GFP_KERNEL, "%s,%s", *result, new); 343 if (cp == NULL) 344 return -ENOMEM; 345 kfree(*result); 346 *result = cp; 347 } 348 return 0; 349 } 350 351 /** 352 * security_add_hooks - Add a modules hooks to the hook lists. 353 * @hooks: the hooks to add 354 * @count: the number of hooks to add 355 * @lsm: the name of the security module 356 * 357 * Each LSM has to register its hooks with the infrastructure. 358 */ 359 void __init security_add_hooks(struct security_hook_list *hooks, int count, 360 char *lsm) 361 { 362 int i; 363 364 for (i = 0; i < count; i++) { 365 hooks[i].lsm = lsm; 366 hlist_add_tail_rcu(&hooks[i].list, hooks[i].head); 367 } 368 if (lsm_append(lsm, &lsm_names) < 0) 369 panic("%s - Cannot get early memory.\n", __func__); 370 } 371 372 int call_lsm_notifier(enum lsm_event event, void *data) 373 { 374 return atomic_notifier_call_chain(&lsm_notifier_chain, event, data); 375 } 376 EXPORT_SYMBOL(call_lsm_notifier); 377 378 int register_lsm_notifier(struct notifier_block *nb) 379 { 380 return atomic_notifier_chain_register(&lsm_notifier_chain, nb); 381 } 382 EXPORT_SYMBOL(register_lsm_notifier); 383 384 int unregister_lsm_notifier(struct notifier_block *nb) 385 { 386 return atomic_notifier_chain_unregister(&lsm_notifier_chain, nb); 387 } 388 EXPORT_SYMBOL(unregister_lsm_notifier); 389 390 /* 391 * Hook list operation macros. 392 * 393 * call_void_hook: 394 * This is a hook that does not return a value. 395 * 396 * call_int_hook: 397 * This is a hook that returns a value. 398 */ 399 400 #define call_void_hook(FUNC, ...) \ 401 do { \ 402 struct security_hook_list *P; \ 403 \ 404 hlist_for_each_entry(P, &security_hook_heads.FUNC, list) \ 405 P->hook.FUNC(__VA_ARGS__); \ 406 } while (0) 407 408 #define call_int_hook(FUNC, IRC, ...) ({ \ 409 int RC = IRC; \ 410 do { \ 411 struct security_hook_list *P; \ 412 \ 413 hlist_for_each_entry(P, &security_hook_heads.FUNC, list) { \ 414 RC = P->hook.FUNC(__VA_ARGS__); \ 415 if (RC != 0) \ 416 break; \ 417 } \ 418 } while (0); \ 419 RC; \ 420 }) 421 422 /* Security operations */ 423 424 int security_binder_set_context_mgr(struct task_struct *mgr) 425 { 426 return call_int_hook(binder_set_context_mgr, 0, mgr); 427 } 428 429 int security_binder_transaction(struct task_struct *from, 430 struct task_struct *to) 431 { 432 return call_int_hook(binder_transaction, 0, from, to); 433 } 434 435 int security_binder_transfer_binder(struct task_struct *from, 436 struct task_struct *to) 437 { 438 return call_int_hook(binder_transfer_binder, 0, from, to); 439 } 440 441 int security_binder_transfer_file(struct task_struct *from, 442 struct task_struct *to, struct file *file) 443 { 444 return call_int_hook(binder_transfer_file, 0, from, to, file); 445 } 446 447 int security_ptrace_access_check(struct task_struct *child, unsigned int mode) 448 { 449 return call_int_hook(ptrace_access_check, 0, child, mode); 450 } 451 452 int security_ptrace_traceme(struct task_struct *parent) 453 { 454 return call_int_hook(ptrace_traceme, 0, parent); 455 } 456 457 int security_capget(struct task_struct *target, 458 kernel_cap_t *effective, 459 kernel_cap_t *inheritable, 460 kernel_cap_t *permitted) 461 { 462 return call_int_hook(capget, 0, target, 463 effective, inheritable, permitted); 464 } 465 466 int security_capset(struct cred *new, const struct cred *old, 467 const kernel_cap_t *effective, 468 const kernel_cap_t *inheritable, 469 const kernel_cap_t *permitted) 470 { 471 return call_int_hook(capset, 0, new, old, 472 effective, inheritable, permitted); 473 } 474 475 int security_capable(const struct cred *cred, struct user_namespace *ns, 476 int cap) 477 { 478 return call_int_hook(capable, 0, cred, ns, cap, SECURITY_CAP_AUDIT); 479 } 480 481 int security_capable_noaudit(const struct cred *cred, struct user_namespace *ns, 482 int cap) 483 { 484 return call_int_hook(capable, 0, cred, ns, cap, SECURITY_CAP_NOAUDIT); 485 } 486 487 int security_quotactl(int cmds, int type, int id, struct super_block *sb) 488 { 489 return call_int_hook(quotactl, 0, cmds, type, id, sb); 490 } 491 492 int security_quota_on(struct dentry *dentry) 493 { 494 return call_int_hook(quota_on, 0, dentry); 495 } 496 497 int security_syslog(int type) 498 { 499 return call_int_hook(syslog, 0, type); 500 } 501 502 int security_settime64(const struct timespec64 *ts, const struct timezone *tz) 503 { 504 return call_int_hook(settime, 0, ts, tz); 505 } 506 507 int security_vm_enough_memory_mm(struct mm_struct *mm, long pages) 508 { 509 struct security_hook_list *hp; 510 int cap_sys_admin = 1; 511 int rc; 512 513 /* 514 * The module will respond with a positive value if 515 * it thinks the __vm_enough_memory() call should be 516 * made with the cap_sys_admin set. If all of the modules 517 * agree that it should be set it will. If any module 518 * thinks it should not be set it won't. 519 */ 520 hlist_for_each_entry(hp, &security_hook_heads.vm_enough_memory, list) { 521 rc = hp->hook.vm_enough_memory(mm, pages); 522 if (rc <= 0) { 523 cap_sys_admin = 0; 524 break; 525 } 526 } 527 return __vm_enough_memory(mm, pages, cap_sys_admin); 528 } 529 530 int security_bprm_set_creds(struct linux_binprm *bprm) 531 { 532 return call_int_hook(bprm_set_creds, 0, bprm); 533 } 534 535 int security_bprm_check(struct linux_binprm *bprm) 536 { 537 int ret; 538 539 ret = call_int_hook(bprm_check_security, 0, bprm); 540 if (ret) 541 return ret; 542 return ima_bprm_check(bprm); 543 } 544 545 void security_bprm_committing_creds(struct linux_binprm *bprm) 546 { 547 call_void_hook(bprm_committing_creds, bprm); 548 } 549 550 void security_bprm_committed_creds(struct linux_binprm *bprm) 551 { 552 call_void_hook(bprm_committed_creds, bprm); 553 } 554 555 int security_sb_alloc(struct super_block *sb) 556 { 557 return call_int_hook(sb_alloc_security, 0, sb); 558 } 559 560 void security_sb_free(struct super_block *sb) 561 { 562 call_void_hook(sb_free_security, sb); 563 } 564 565 void security_free_mnt_opts(void **mnt_opts) 566 { 567 if (!*mnt_opts) 568 return; 569 call_void_hook(sb_free_mnt_opts, *mnt_opts); 570 *mnt_opts = NULL; 571 } 572 EXPORT_SYMBOL(security_free_mnt_opts); 573 574 int security_sb_eat_lsm_opts(char *options, void **mnt_opts) 575 { 576 return call_int_hook(sb_eat_lsm_opts, 0, options, mnt_opts); 577 } 578 EXPORT_SYMBOL(security_sb_eat_lsm_opts); 579 580 int security_sb_remount(struct super_block *sb, 581 void *mnt_opts) 582 { 583 return call_int_hook(sb_remount, 0, sb, mnt_opts); 584 } 585 EXPORT_SYMBOL(security_sb_remount); 586 587 int security_sb_kern_mount(struct super_block *sb) 588 { 589 return call_int_hook(sb_kern_mount, 0, sb); 590 } 591 592 int security_sb_show_options(struct seq_file *m, struct super_block *sb) 593 { 594 return call_int_hook(sb_show_options, 0, m, sb); 595 } 596 597 int security_sb_statfs(struct dentry *dentry) 598 { 599 return call_int_hook(sb_statfs, 0, dentry); 600 } 601 602 int security_sb_mount(const char *dev_name, const struct path *path, 603 const char *type, unsigned long flags, void *data) 604 { 605 return call_int_hook(sb_mount, 0, dev_name, path, type, flags, data); 606 } 607 608 int security_sb_umount(struct vfsmount *mnt, int flags) 609 { 610 return call_int_hook(sb_umount, 0, mnt, flags); 611 } 612 613 int security_sb_pivotroot(const struct path *old_path, const struct path *new_path) 614 { 615 return call_int_hook(sb_pivotroot, 0, old_path, new_path); 616 } 617 618 int security_sb_set_mnt_opts(struct super_block *sb, 619 void *mnt_opts, 620 unsigned long kern_flags, 621 unsigned long *set_kern_flags) 622 { 623 return call_int_hook(sb_set_mnt_opts, 624 mnt_opts ? -EOPNOTSUPP : 0, sb, 625 mnt_opts, kern_flags, set_kern_flags); 626 } 627 EXPORT_SYMBOL(security_sb_set_mnt_opts); 628 629 int security_sb_clone_mnt_opts(const struct super_block *oldsb, 630 struct super_block *newsb, 631 unsigned long kern_flags, 632 unsigned long *set_kern_flags) 633 { 634 return call_int_hook(sb_clone_mnt_opts, 0, oldsb, newsb, 635 kern_flags, set_kern_flags); 636 } 637 EXPORT_SYMBOL(security_sb_clone_mnt_opts); 638 639 int security_add_mnt_opt(const char *option, const char *val, int len, 640 void **mnt_opts) 641 { 642 return call_int_hook(sb_add_mnt_opt, -EINVAL, 643 option, val, len, mnt_opts); 644 } 645 EXPORT_SYMBOL(security_add_mnt_opt); 646 647 int security_inode_alloc(struct inode *inode) 648 { 649 inode->i_security = NULL; 650 return call_int_hook(inode_alloc_security, 0, inode); 651 } 652 653 void security_inode_free(struct inode *inode) 654 { 655 integrity_inode_free(inode); 656 call_void_hook(inode_free_security, inode); 657 } 658 659 int security_dentry_init_security(struct dentry *dentry, int mode, 660 const struct qstr *name, void **ctx, 661 u32 *ctxlen) 662 { 663 return call_int_hook(dentry_init_security, -EOPNOTSUPP, dentry, mode, 664 name, ctx, ctxlen); 665 } 666 EXPORT_SYMBOL(security_dentry_init_security); 667 668 int security_dentry_create_files_as(struct dentry *dentry, int mode, 669 struct qstr *name, 670 const struct cred *old, struct cred *new) 671 { 672 return call_int_hook(dentry_create_files_as, 0, dentry, mode, 673 name, old, new); 674 } 675 EXPORT_SYMBOL(security_dentry_create_files_as); 676 677 int security_inode_init_security(struct inode *inode, struct inode *dir, 678 const struct qstr *qstr, 679 const initxattrs initxattrs, void *fs_data) 680 { 681 struct xattr new_xattrs[MAX_LSM_EVM_XATTR + 1]; 682 struct xattr *lsm_xattr, *evm_xattr, *xattr; 683 int ret; 684 685 if (unlikely(IS_PRIVATE(inode))) 686 return 0; 687 688 if (!initxattrs) 689 return call_int_hook(inode_init_security, -EOPNOTSUPP, inode, 690 dir, qstr, NULL, NULL, NULL); 691 memset(new_xattrs, 0, sizeof(new_xattrs)); 692 lsm_xattr = new_xattrs; 693 ret = call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir, qstr, 694 &lsm_xattr->name, 695 &lsm_xattr->value, 696 &lsm_xattr->value_len); 697 if (ret) 698 goto out; 699 700 evm_xattr = lsm_xattr + 1; 701 ret = evm_inode_init_security(inode, lsm_xattr, evm_xattr); 702 if (ret) 703 goto out; 704 ret = initxattrs(inode, new_xattrs, fs_data); 705 out: 706 for (xattr = new_xattrs; xattr->value != NULL; xattr++) 707 kfree(xattr->value); 708 return (ret == -EOPNOTSUPP) ? 0 : ret; 709 } 710 EXPORT_SYMBOL(security_inode_init_security); 711 712 int security_old_inode_init_security(struct inode *inode, struct inode *dir, 713 const struct qstr *qstr, const char **name, 714 void **value, size_t *len) 715 { 716 if (unlikely(IS_PRIVATE(inode))) 717 return -EOPNOTSUPP; 718 return call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir, 719 qstr, name, value, len); 720 } 721 EXPORT_SYMBOL(security_old_inode_init_security); 722 723 #ifdef CONFIG_SECURITY_PATH 724 int security_path_mknod(const struct path *dir, struct dentry *dentry, umode_t mode, 725 unsigned int dev) 726 { 727 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) 728 return 0; 729 return call_int_hook(path_mknod, 0, dir, dentry, mode, dev); 730 } 731 EXPORT_SYMBOL(security_path_mknod); 732 733 int security_path_mkdir(const struct path *dir, struct dentry *dentry, umode_t mode) 734 { 735 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) 736 return 0; 737 return call_int_hook(path_mkdir, 0, dir, dentry, mode); 738 } 739 EXPORT_SYMBOL(security_path_mkdir); 740 741 int security_path_rmdir(const struct path *dir, struct dentry *dentry) 742 { 743 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) 744 return 0; 745 return call_int_hook(path_rmdir, 0, dir, dentry); 746 } 747 748 int security_path_unlink(const struct path *dir, struct dentry *dentry) 749 { 750 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) 751 return 0; 752 return call_int_hook(path_unlink, 0, dir, dentry); 753 } 754 EXPORT_SYMBOL(security_path_unlink); 755 756 int security_path_symlink(const struct path *dir, struct dentry *dentry, 757 const char *old_name) 758 { 759 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) 760 return 0; 761 return call_int_hook(path_symlink, 0, dir, dentry, old_name); 762 } 763 764 int security_path_link(struct dentry *old_dentry, const struct path *new_dir, 765 struct dentry *new_dentry) 766 { 767 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)))) 768 return 0; 769 return call_int_hook(path_link, 0, old_dentry, new_dir, new_dentry); 770 } 771 772 int security_path_rename(const struct path *old_dir, struct dentry *old_dentry, 773 const struct path *new_dir, struct dentry *new_dentry, 774 unsigned int flags) 775 { 776 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) || 777 (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry))))) 778 return 0; 779 780 if (flags & RENAME_EXCHANGE) { 781 int err = call_int_hook(path_rename, 0, new_dir, new_dentry, 782 old_dir, old_dentry); 783 if (err) 784 return err; 785 } 786 787 return call_int_hook(path_rename, 0, old_dir, old_dentry, new_dir, 788 new_dentry); 789 } 790 EXPORT_SYMBOL(security_path_rename); 791 792 int security_path_truncate(const struct path *path) 793 { 794 if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry)))) 795 return 0; 796 return call_int_hook(path_truncate, 0, path); 797 } 798 799 int security_path_chmod(const struct path *path, umode_t mode) 800 { 801 if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry)))) 802 return 0; 803 return call_int_hook(path_chmod, 0, path, mode); 804 } 805 806 int security_path_chown(const struct path *path, kuid_t uid, kgid_t gid) 807 { 808 if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry)))) 809 return 0; 810 return call_int_hook(path_chown, 0, path, uid, gid); 811 } 812 813 int security_path_chroot(const struct path *path) 814 { 815 return call_int_hook(path_chroot, 0, path); 816 } 817 #endif 818 819 int security_inode_create(struct inode *dir, struct dentry *dentry, umode_t mode) 820 { 821 if (unlikely(IS_PRIVATE(dir))) 822 return 0; 823 return call_int_hook(inode_create, 0, dir, dentry, mode); 824 } 825 EXPORT_SYMBOL_GPL(security_inode_create); 826 827 int security_inode_link(struct dentry *old_dentry, struct inode *dir, 828 struct dentry *new_dentry) 829 { 830 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)))) 831 return 0; 832 return call_int_hook(inode_link, 0, old_dentry, dir, new_dentry); 833 } 834 835 int security_inode_unlink(struct inode *dir, struct dentry *dentry) 836 { 837 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 838 return 0; 839 return call_int_hook(inode_unlink, 0, dir, dentry); 840 } 841 842 int security_inode_symlink(struct inode *dir, struct dentry *dentry, 843 const char *old_name) 844 { 845 if (unlikely(IS_PRIVATE(dir))) 846 return 0; 847 return call_int_hook(inode_symlink, 0, dir, dentry, old_name); 848 } 849 850 int security_inode_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) 851 { 852 if (unlikely(IS_PRIVATE(dir))) 853 return 0; 854 return call_int_hook(inode_mkdir, 0, dir, dentry, mode); 855 } 856 EXPORT_SYMBOL_GPL(security_inode_mkdir); 857 858 int security_inode_rmdir(struct inode *dir, struct dentry *dentry) 859 { 860 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 861 return 0; 862 return call_int_hook(inode_rmdir, 0, dir, dentry); 863 } 864 865 int security_inode_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t dev) 866 { 867 if (unlikely(IS_PRIVATE(dir))) 868 return 0; 869 return call_int_hook(inode_mknod, 0, dir, dentry, mode, dev); 870 } 871 872 int security_inode_rename(struct inode *old_dir, struct dentry *old_dentry, 873 struct inode *new_dir, struct dentry *new_dentry, 874 unsigned int flags) 875 { 876 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) || 877 (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry))))) 878 return 0; 879 880 if (flags & RENAME_EXCHANGE) { 881 int err = call_int_hook(inode_rename, 0, new_dir, new_dentry, 882 old_dir, old_dentry); 883 if (err) 884 return err; 885 } 886 887 return call_int_hook(inode_rename, 0, old_dir, old_dentry, 888 new_dir, new_dentry); 889 } 890 891 int security_inode_readlink(struct dentry *dentry) 892 { 893 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 894 return 0; 895 return call_int_hook(inode_readlink, 0, dentry); 896 } 897 898 int security_inode_follow_link(struct dentry *dentry, struct inode *inode, 899 bool rcu) 900 { 901 if (unlikely(IS_PRIVATE(inode))) 902 return 0; 903 return call_int_hook(inode_follow_link, 0, dentry, inode, rcu); 904 } 905 906 int security_inode_permission(struct inode *inode, int mask) 907 { 908 if (unlikely(IS_PRIVATE(inode))) 909 return 0; 910 return call_int_hook(inode_permission, 0, inode, mask); 911 } 912 913 int security_inode_setattr(struct dentry *dentry, struct iattr *attr) 914 { 915 int ret; 916 917 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 918 return 0; 919 ret = call_int_hook(inode_setattr, 0, dentry, attr); 920 if (ret) 921 return ret; 922 return evm_inode_setattr(dentry, attr); 923 } 924 EXPORT_SYMBOL_GPL(security_inode_setattr); 925 926 int security_inode_getattr(const struct path *path) 927 { 928 if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry)))) 929 return 0; 930 return call_int_hook(inode_getattr, 0, path); 931 } 932 933 int security_inode_setxattr(struct dentry *dentry, const char *name, 934 const void *value, size_t size, int flags) 935 { 936 int ret; 937 938 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 939 return 0; 940 /* 941 * SELinux and Smack integrate the cap call, 942 * so assume that all LSMs supplying this call do so. 943 */ 944 ret = call_int_hook(inode_setxattr, 1, dentry, name, value, size, 945 flags); 946 947 if (ret == 1) 948 ret = cap_inode_setxattr(dentry, name, value, size, flags); 949 if (ret) 950 return ret; 951 ret = ima_inode_setxattr(dentry, name, value, size); 952 if (ret) 953 return ret; 954 return evm_inode_setxattr(dentry, name, value, size); 955 } 956 957 void security_inode_post_setxattr(struct dentry *dentry, const char *name, 958 const void *value, size_t size, int flags) 959 { 960 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 961 return; 962 call_void_hook(inode_post_setxattr, dentry, name, value, size, flags); 963 evm_inode_post_setxattr(dentry, name, value, size); 964 } 965 966 int security_inode_getxattr(struct dentry *dentry, const char *name) 967 { 968 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 969 return 0; 970 return call_int_hook(inode_getxattr, 0, dentry, name); 971 } 972 973 int security_inode_listxattr(struct dentry *dentry) 974 { 975 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 976 return 0; 977 return call_int_hook(inode_listxattr, 0, dentry); 978 } 979 980 int security_inode_removexattr(struct dentry *dentry, const char *name) 981 { 982 int ret; 983 984 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 985 return 0; 986 /* 987 * SELinux and Smack integrate the cap call, 988 * so assume that all LSMs supplying this call do so. 989 */ 990 ret = call_int_hook(inode_removexattr, 1, dentry, name); 991 if (ret == 1) 992 ret = cap_inode_removexattr(dentry, name); 993 if (ret) 994 return ret; 995 ret = ima_inode_removexattr(dentry, name); 996 if (ret) 997 return ret; 998 return evm_inode_removexattr(dentry, name); 999 } 1000 1001 int security_inode_need_killpriv(struct dentry *dentry) 1002 { 1003 return call_int_hook(inode_need_killpriv, 0, dentry); 1004 } 1005 1006 int security_inode_killpriv(struct dentry *dentry) 1007 { 1008 return call_int_hook(inode_killpriv, 0, dentry); 1009 } 1010 1011 int security_inode_getsecurity(struct inode *inode, const char *name, void **buffer, bool alloc) 1012 { 1013 struct security_hook_list *hp; 1014 int rc; 1015 1016 if (unlikely(IS_PRIVATE(inode))) 1017 return -EOPNOTSUPP; 1018 /* 1019 * Only one module will provide an attribute with a given name. 1020 */ 1021 hlist_for_each_entry(hp, &security_hook_heads.inode_getsecurity, list) { 1022 rc = hp->hook.inode_getsecurity(inode, name, buffer, alloc); 1023 if (rc != -EOPNOTSUPP) 1024 return rc; 1025 } 1026 return -EOPNOTSUPP; 1027 } 1028 1029 int security_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags) 1030 { 1031 struct security_hook_list *hp; 1032 int rc; 1033 1034 if (unlikely(IS_PRIVATE(inode))) 1035 return -EOPNOTSUPP; 1036 /* 1037 * Only one module will provide an attribute with a given name. 1038 */ 1039 hlist_for_each_entry(hp, &security_hook_heads.inode_setsecurity, list) { 1040 rc = hp->hook.inode_setsecurity(inode, name, value, size, 1041 flags); 1042 if (rc != -EOPNOTSUPP) 1043 return rc; 1044 } 1045 return -EOPNOTSUPP; 1046 } 1047 1048 int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size) 1049 { 1050 if (unlikely(IS_PRIVATE(inode))) 1051 return 0; 1052 return call_int_hook(inode_listsecurity, 0, inode, buffer, buffer_size); 1053 } 1054 EXPORT_SYMBOL(security_inode_listsecurity); 1055 1056 void security_inode_getsecid(struct inode *inode, u32 *secid) 1057 { 1058 call_void_hook(inode_getsecid, inode, secid); 1059 } 1060 1061 int security_inode_copy_up(struct dentry *src, struct cred **new) 1062 { 1063 return call_int_hook(inode_copy_up, 0, src, new); 1064 } 1065 EXPORT_SYMBOL(security_inode_copy_up); 1066 1067 int security_inode_copy_up_xattr(const char *name) 1068 { 1069 return call_int_hook(inode_copy_up_xattr, -EOPNOTSUPP, name); 1070 } 1071 EXPORT_SYMBOL(security_inode_copy_up_xattr); 1072 1073 int security_file_permission(struct file *file, int mask) 1074 { 1075 int ret; 1076 1077 ret = call_int_hook(file_permission, 0, file, mask); 1078 if (ret) 1079 return ret; 1080 1081 return fsnotify_perm(file, mask); 1082 } 1083 1084 int security_file_alloc(struct file *file) 1085 { 1086 return call_int_hook(file_alloc_security, 0, file); 1087 } 1088 1089 void security_file_free(struct file *file) 1090 { 1091 call_void_hook(file_free_security, file); 1092 } 1093 1094 int security_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 1095 { 1096 return call_int_hook(file_ioctl, 0, file, cmd, arg); 1097 } 1098 1099 static inline unsigned long mmap_prot(struct file *file, unsigned long prot) 1100 { 1101 /* 1102 * Does we have PROT_READ and does the application expect 1103 * it to imply PROT_EXEC? If not, nothing to talk about... 1104 */ 1105 if ((prot & (PROT_READ | PROT_EXEC)) != PROT_READ) 1106 return prot; 1107 if (!(current->personality & READ_IMPLIES_EXEC)) 1108 return prot; 1109 /* 1110 * if that's an anonymous mapping, let it. 1111 */ 1112 if (!file) 1113 return prot | PROT_EXEC; 1114 /* 1115 * ditto if it's not on noexec mount, except that on !MMU we need 1116 * NOMMU_MAP_EXEC (== VM_MAYEXEC) in this case 1117 */ 1118 if (!path_noexec(&file->f_path)) { 1119 #ifndef CONFIG_MMU 1120 if (file->f_op->mmap_capabilities) { 1121 unsigned caps = file->f_op->mmap_capabilities(file); 1122 if (!(caps & NOMMU_MAP_EXEC)) 1123 return prot; 1124 } 1125 #endif 1126 return prot | PROT_EXEC; 1127 } 1128 /* anything on noexec mount won't get PROT_EXEC */ 1129 return prot; 1130 } 1131 1132 int security_mmap_file(struct file *file, unsigned long prot, 1133 unsigned long flags) 1134 { 1135 int ret; 1136 ret = call_int_hook(mmap_file, 0, file, prot, 1137 mmap_prot(file, prot), flags); 1138 if (ret) 1139 return ret; 1140 return ima_file_mmap(file, prot); 1141 } 1142 1143 int security_mmap_addr(unsigned long addr) 1144 { 1145 return call_int_hook(mmap_addr, 0, addr); 1146 } 1147 1148 int security_file_mprotect(struct vm_area_struct *vma, unsigned long reqprot, 1149 unsigned long prot) 1150 { 1151 return call_int_hook(file_mprotect, 0, vma, reqprot, prot); 1152 } 1153 1154 int security_file_lock(struct file *file, unsigned int cmd) 1155 { 1156 return call_int_hook(file_lock, 0, file, cmd); 1157 } 1158 1159 int security_file_fcntl(struct file *file, unsigned int cmd, unsigned long arg) 1160 { 1161 return call_int_hook(file_fcntl, 0, file, cmd, arg); 1162 } 1163 1164 void security_file_set_fowner(struct file *file) 1165 { 1166 call_void_hook(file_set_fowner, file); 1167 } 1168 1169 int security_file_send_sigiotask(struct task_struct *tsk, 1170 struct fown_struct *fown, int sig) 1171 { 1172 return call_int_hook(file_send_sigiotask, 0, tsk, fown, sig); 1173 } 1174 1175 int security_file_receive(struct file *file) 1176 { 1177 return call_int_hook(file_receive, 0, file); 1178 } 1179 1180 int security_file_open(struct file *file) 1181 { 1182 int ret; 1183 1184 ret = call_int_hook(file_open, 0, file); 1185 if (ret) 1186 return ret; 1187 1188 return fsnotify_perm(file, MAY_OPEN); 1189 } 1190 1191 int security_task_alloc(struct task_struct *task, unsigned long clone_flags) 1192 { 1193 return call_int_hook(task_alloc, 0, task, clone_flags); 1194 } 1195 1196 void security_task_free(struct task_struct *task) 1197 { 1198 call_void_hook(task_free, task); 1199 } 1200 1201 int security_cred_alloc_blank(struct cred *cred, gfp_t gfp) 1202 { 1203 return call_int_hook(cred_alloc_blank, 0, cred, gfp); 1204 } 1205 1206 void security_cred_free(struct cred *cred) 1207 { 1208 call_void_hook(cred_free, cred); 1209 } 1210 1211 int security_prepare_creds(struct cred *new, const struct cred *old, gfp_t gfp) 1212 { 1213 return call_int_hook(cred_prepare, 0, new, old, gfp); 1214 } 1215 1216 void security_transfer_creds(struct cred *new, const struct cred *old) 1217 { 1218 call_void_hook(cred_transfer, new, old); 1219 } 1220 1221 void security_cred_getsecid(const struct cred *c, u32 *secid) 1222 { 1223 *secid = 0; 1224 call_void_hook(cred_getsecid, c, secid); 1225 } 1226 EXPORT_SYMBOL(security_cred_getsecid); 1227 1228 int security_kernel_act_as(struct cred *new, u32 secid) 1229 { 1230 return call_int_hook(kernel_act_as, 0, new, secid); 1231 } 1232 1233 int security_kernel_create_files_as(struct cred *new, struct inode *inode) 1234 { 1235 return call_int_hook(kernel_create_files_as, 0, new, inode); 1236 } 1237 1238 int security_kernel_module_request(char *kmod_name) 1239 { 1240 int ret; 1241 1242 ret = call_int_hook(kernel_module_request, 0, kmod_name); 1243 if (ret) 1244 return ret; 1245 return integrity_kernel_module_request(kmod_name); 1246 } 1247 1248 int security_kernel_read_file(struct file *file, enum kernel_read_file_id id) 1249 { 1250 int ret; 1251 1252 ret = call_int_hook(kernel_read_file, 0, file, id); 1253 if (ret) 1254 return ret; 1255 return ima_read_file(file, id); 1256 } 1257 EXPORT_SYMBOL_GPL(security_kernel_read_file); 1258 1259 int security_kernel_post_read_file(struct file *file, char *buf, loff_t size, 1260 enum kernel_read_file_id id) 1261 { 1262 int ret; 1263 1264 ret = call_int_hook(kernel_post_read_file, 0, file, buf, size, id); 1265 if (ret) 1266 return ret; 1267 return ima_post_read_file(file, buf, size, id); 1268 } 1269 EXPORT_SYMBOL_GPL(security_kernel_post_read_file); 1270 1271 int security_kernel_load_data(enum kernel_load_data_id id) 1272 { 1273 int ret; 1274 1275 ret = call_int_hook(kernel_load_data, 0, id); 1276 if (ret) 1277 return ret; 1278 return ima_load_data(id); 1279 } 1280 EXPORT_SYMBOL_GPL(security_kernel_load_data); 1281 1282 int security_task_fix_setuid(struct cred *new, const struct cred *old, 1283 int flags) 1284 { 1285 return call_int_hook(task_fix_setuid, 0, new, old, flags); 1286 } 1287 1288 int security_task_setpgid(struct task_struct *p, pid_t pgid) 1289 { 1290 return call_int_hook(task_setpgid, 0, p, pgid); 1291 } 1292 1293 int security_task_getpgid(struct task_struct *p) 1294 { 1295 return call_int_hook(task_getpgid, 0, p); 1296 } 1297 1298 int security_task_getsid(struct task_struct *p) 1299 { 1300 return call_int_hook(task_getsid, 0, p); 1301 } 1302 1303 void security_task_getsecid(struct task_struct *p, u32 *secid) 1304 { 1305 *secid = 0; 1306 call_void_hook(task_getsecid, p, secid); 1307 } 1308 EXPORT_SYMBOL(security_task_getsecid); 1309 1310 int security_task_setnice(struct task_struct *p, int nice) 1311 { 1312 return call_int_hook(task_setnice, 0, p, nice); 1313 } 1314 1315 int security_task_setioprio(struct task_struct *p, int ioprio) 1316 { 1317 return call_int_hook(task_setioprio, 0, p, ioprio); 1318 } 1319 1320 int security_task_getioprio(struct task_struct *p) 1321 { 1322 return call_int_hook(task_getioprio, 0, p); 1323 } 1324 1325 int security_task_prlimit(const struct cred *cred, const struct cred *tcred, 1326 unsigned int flags) 1327 { 1328 return call_int_hook(task_prlimit, 0, cred, tcred, flags); 1329 } 1330 1331 int security_task_setrlimit(struct task_struct *p, unsigned int resource, 1332 struct rlimit *new_rlim) 1333 { 1334 return call_int_hook(task_setrlimit, 0, p, resource, new_rlim); 1335 } 1336 1337 int security_task_setscheduler(struct task_struct *p) 1338 { 1339 return call_int_hook(task_setscheduler, 0, p); 1340 } 1341 1342 int security_task_getscheduler(struct task_struct *p) 1343 { 1344 return call_int_hook(task_getscheduler, 0, p); 1345 } 1346 1347 int security_task_movememory(struct task_struct *p) 1348 { 1349 return call_int_hook(task_movememory, 0, p); 1350 } 1351 1352 int security_task_kill(struct task_struct *p, struct kernel_siginfo *info, 1353 int sig, const struct cred *cred) 1354 { 1355 return call_int_hook(task_kill, 0, p, info, sig, cred); 1356 } 1357 1358 int security_task_prctl(int option, unsigned long arg2, unsigned long arg3, 1359 unsigned long arg4, unsigned long arg5) 1360 { 1361 int thisrc; 1362 int rc = -ENOSYS; 1363 struct security_hook_list *hp; 1364 1365 hlist_for_each_entry(hp, &security_hook_heads.task_prctl, list) { 1366 thisrc = hp->hook.task_prctl(option, arg2, arg3, arg4, arg5); 1367 if (thisrc != -ENOSYS) { 1368 rc = thisrc; 1369 if (thisrc != 0) 1370 break; 1371 } 1372 } 1373 return rc; 1374 } 1375 1376 void security_task_to_inode(struct task_struct *p, struct inode *inode) 1377 { 1378 call_void_hook(task_to_inode, p, inode); 1379 } 1380 1381 int security_ipc_permission(struct kern_ipc_perm *ipcp, short flag) 1382 { 1383 return call_int_hook(ipc_permission, 0, ipcp, flag); 1384 } 1385 1386 void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid) 1387 { 1388 *secid = 0; 1389 call_void_hook(ipc_getsecid, ipcp, secid); 1390 } 1391 1392 int security_msg_msg_alloc(struct msg_msg *msg) 1393 { 1394 return call_int_hook(msg_msg_alloc_security, 0, msg); 1395 } 1396 1397 void security_msg_msg_free(struct msg_msg *msg) 1398 { 1399 call_void_hook(msg_msg_free_security, msg); 1400 } 1401 1402 int security_msg_queue_alloc(struct kern_ipc_perm *msq) 1403 { 1404 return call_int_hook(msg_queue_alloc_security, 0, msq); 1405 } 1406 1407 void security_msg_queue_free(struct kern_ipc_perm *msq) 1408 { 1409 call_void_hook(msg_queue_free_security, msq); 1410 } 1411 1412 int security_msg_queue_associate(struct kern_ipc_perm *msq, int msqflg) 1413 { 1414 return call_int_hook(msg_queue_associate, 0, msq, msqflg); 1415 } 1416 1417 int security_msg_queue_msgctl(struct kern_ipc_perm *msq, int cmd) 1418 { 1419 return call_int_hook(msg_queue_msgctl, 0, msq, cmd); 1420 } 1421 1422 int security_msg_queue_msgsnd(struct kern_ipc_perm *msq, 1423 struct msg_msg *msg, int msqflg) 1424 { 1425 return call_int_hook(msg_queue_msgsnd, 0, msq, msg, msqflg); 1426 } 1427 1428 int security_msg_queue_msgrcv(struct kern_ipc_perm *msq, struct msg_msg *msg, 1429 struct task_struct *target, long type, int mode) 1430 { 1431 return call_int_hook(msg_queue_msgrcv, 0, msq, msg, target, type, mode); 1432 } 1433 1434 int security_shm_alloc(struct kern_ipc_perm *shp) 1435 { 1436 return call_int_hook(shm_alloc_security, 0, shp); 1437 } 1438 1439 void security_shm_free(struct kern_ipc_perm *shp) 1440 { 1441 call_void_hook(shm_free_security, shp); 1442 } 1443 1444 int security_shm_associate(struct kern_ipc_perm *shp, int shmflg) 1445 { 1446 return call_int_hook(shm_associate, 0, shp, shmflg); 1447 } 1448 1449 int security_shm_shmctl(struct kern_ipc_perm *shp, int cmd) 1450 { 1451 return call_int_hook(shm_shmctl, 0, shp, cmd); 1452 } 1453 1454 int security_shm_shmat(struct kern_ipc_perm *shp, char __user *shmaddr, int shmflg) 1455 { 1456 return call_int_hook(shm_shmat, 0, shp, shmaddr, shmflg); 1457 } 1458 1459 int security_sem_alloc(struct kern_ipc_perm *sma) 1460 { 1461 return call_int_hook(sem_alloc_security, 0, sma); 1462 } 1463 1464 void security_sem_free(struct kern_ipc_perm *sma) 1465 { 1466 call_void_hook(sem_free_security, sma); 1467 } 1468 1469 int security_sem_associate(struct kern_ipc_perm *sma, int semflg) 1470 { 1471 return call_int_hook(sem_associate, 0, sma, semflg); 1472 } 1473 1474 int security_sem_semctl(struct kern_ipc_perm *sma, int cmd) 1475 { 1476 return call_int_hook(sem_semctl, 0, sma, cmd); 1477 } 1478 1479 int security_sem_semop(struct kern_ipc_perm *sma, struct sembuf *sops, 1480 unsigned nsops, int alter) 1481 { 1482 return call_int_hook(sem_semop, 0, sma, sops, nsops, alter); 1483 } 1484 1485 void security_d_instantiate(struct dentry *dentry, struct inode *inode) 1486 { 1487 if (unlikely(inode && IS_PRIVATE(inode))) 1488 return; 1489 call_void_hook(d_instantiate, dentry, inode); 1490 } 1491 EXPORT_SYMBOL(security_d_instantiate); 1492 1493 int security_getprocattr(struct task_struct *p, char *name, char **value) 1494 { 1495 return call_int_hook(getprocattr, -EINVAL, p, name, value); 1496 } 1497 1498 int security_setprocattr(const char *name, void *value, size_t size) 1499 { 1500 return call_int_hook(setprocattr, -EINVAL, name, value, size); 1501 } 1502 1503 int security_netlink_send(struct sock *sk, struct sk_buff *skb) 1504 { 1505 return call_int_hook(netlink_send, 0, sk, skb); 1506 } 1507 1508 int security_ismaclabel(const char *name) 1509 { 1510 return call_int_hook(ismaclabel, 0, name); 1511 } 1512 EXPORT_SYMBOL(security_ismaclabel); 1513 1514 int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen) 1515 { 1516 return call_int_hook(secid_to_secctx, -EOPNOTSUPP, secid, secdata, 1517 seclen); 1518 } 1519 EXPORT_SYMBOL(security_secid_to_secctx); 1520 1521 int security_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid) 1522 { 1523 *secid = 0; 1524 return call_int_hook(secctx_to_secid, 0, secdata, seclen, secid); 1525 } 1526 EXPORT_SYMBOL(security_secctx_to_secid); 1527 1528 void security_release_secctx(char *secdata, u32 seclen) 1529 { 1530 call_void_hook(release_secctx, secdata, seclen); 1531 } 1532 EXPORT_SYMBOL(security_release_secctx); 1533 1534 void security_inode_invalidate_secctx(struct inode *inode) 1535 { 1536 call_void_hook(inode_invalidate_secctx, inode); 1537 } 1538 EXPORT_SYMBOL(security_inode_invalidate_secctx); 1539 1540 int security_inode_notifysecctx(struct inode *inode, void *ctx, u32 ctxlen) 1541 { 1542 return call_int_hook(inode_notifysecctx, 0, inode, ctx, ctxlen); 1543 } 1544 EXPORT_SYMBOL(security_inode_notifysecctx); 1545 1546 int security_inode_setsecctx(struct dentry *dentry, void *ctx, u32 ctxlen) 1547 { 1548 return call_int_hook(inode_setsecctx, 0, dentry, ctx, ctxlen); 1549 } 1550 EXPORT_SYMBOL(security_inode_setsecctx); 1551 1552 int security_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen) 1553 { 1554 return call_int_hook(inode_getsecctx, -EOPNOTSUPP, inode, ctx, ctxlen); 1555 } 1556 EXPORT_SYMBOL(security_inode_getsecctx); 1557 1558 #ifdef CONFIG_SECURITY_NETWORK 1559 1560 int security_unix_stream_connect(struct sock *sock, struct sock *other, struct sock *newsk) 1561 { 1562 return call_int_hook(unix_stream_connect, 0, sock, other, newsk); 1563 } 1564 EXPORT_SYMBOL(security_unix_stream_connect); 1565 1566 int security_unix_may_send(struct socket *sock, struct socket *other) 1567 { 1568 return call_int_hook(unix_may_send, 0, sock, other); 1569 } 1570 EXPORT_SYMBOL(security_unix_may_send); 1571 1572 int security_socket_create(int family, int type, int protocol, int kern) 1573 { 1574 return call_int_hook(socket_create, 0, family, type, protocol, kern); 1575 } 1576 1577 int security_socket_post_create(struct socket *sock, int family, 1578 int type, int protocol, int kern) 1579 { 1580 return call_int_hook(socket_post_create, 0, sock, family, type, 1581 protocol, kern); 1582 } 1583 1584 int security_socket_socketpair(struct socket *socka, struct socket *sockb) 1585 { 1586 return call_int_hook(socket_socketpair, 0, socka, sockb); 1587 } 1588 EXPORT_SYMBOL(security_socket_socketpair); 1589 1590 int security_socket_bind(struct socket *sock, struct sockaddr *address, int addrlen) 1591 { 1592 return call_int_hook(socket_bind, 0, sock, address, addrlen); 1593 } 1594 1595 int security_socket_connect(struct socket *sock, struct sockaddr *address, int addrlen) 1596 { 1597 return call_int_hook(socket_connect, 0, sock, address, addrlen); 1598 } 1599 1600 int security_socket_listen(struct socket *sock, int backlog) 1601 { 1602 return call_int_hook(socket_listen, 0, sock, backlog); 1603 } 1604 1605 int security_socket_accept(struct socket *sock, struct socket *newsock) 1606 { 1607 return call_int_hook(socket_accept, 0, sock, newsock); 1608 } 1609 1610 int security_socket_sendmsg(struct socket *sock, struct msghdr *msg, int size) 1611 { 1612 return call_int_hook(socket_sendmsg, 0, sock, msg, size); 1613 } 1614 1615 int security_socket_recvmsg(struct socket *sock, struct msghdr *msg, 1616 int size, int flags) 1617 { 1618 return call_int_hook(socket_recvmsg, 0, sock, msg, size, flags); 1619 } 1620 1621 int security_socket_getsockname(struct socket *sock) 1622 { 1623 return call_int_hook(socket_getsockname, 0, sock); 1624 } 1625 1626 int security_socket_getpeername(struct socket *sock) 1627 { 1628 return call_int_hook(socket_getpeername, 0, sock); 1629 } 1630 1631 int security_socket_getsockopt(struct socket *sock, int level, int optname) 1632 { 1633 return call_int_hook(socket_getsockopt, 0, sock, level, optname); 1634 } 1635 1636 int security_socket_setsockopt(struct socket *sock, int level, int optname) 1637 { 1638 return call_int_hook(socket_setsockopt, 0, sock, level, optname); 1639 } 1640 1641 int security_socket_shutdown(struct socket *sock, int how) 1642 { 1643 return call_int_hook(socket_shutdown, 0, sock, how); 1644 } 1645 1646 int security_sock_rcv_skb(struct sock *sk, struct sk_buff *skb) 1647 { 1648 return call_int_hook(socket_sock_rcv_skb, 0, sk, skb); 1649 } 1650 EXPORT_SYMBOL(security_sock_rcv_skb); 1651 1652 int security_socket_getpeersec_stream(struct socket *sock, char __user *optval, 1653 int __user *optlen, unsigned len) 1654 { 1655 return call_int_hook(socket_getpeersec_stream, -ENOPROTOOPT, sock, 1656 optval, optlen, len); 1657 } 1658 1659 int security_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb, u32 *secid) 1660 { 1661 return call_int_hook(socket_getpeersec_dgram, -ENOPROTOOPT, sock, 1662 skb, secid); 1663 } 1664 EXPORT_SYMBOL(security_socket_getpeersec_dgram); 1665 1666 int security_sk_alloc(struct sock *sk, int family, gfp_t priority) 1667 { 1668 return call_int_hook(sk_alloc_security, 0, sk, family, priority); 1669 } 1670 1671 void security_sk_free(struct sock *sk) 1672 { 1673 call_void_hook(sk_free_security, sk); 1674 } 1675 1676 void security_sk_clone(const struct sock *sk, struct sock *newsk) 1677 { 1678 call_void_hook(sk_clone_security, sk, newsk); 1679 } 1680 EXPORT_SYMBOL(security_sk_clone); 1681 1682 void security_sk_classify_flow(struct sock *sk, struct flowi *fl) 1683 { 1684 call_void_hook(sk_getsecid, sk, &fl->flowi_secid); 1685 } 1686 EXPORT_SYMBOL(security_sk_classify_flow); 1687 1688 void security_req_classify_flow(const struct request_sock *req, struct flowi *fl) 1689 { 1690 call_void_hook(req_classify_flow, req, fl); 1691 } 1692 EXPORT_SYMBOL(security_req_classify_flow); 1693 1694 void security_sock_graft(struct sock *sk, struct socket *parent) 1695 { 1696 call_void_hook(sock_graft, sk, parent); 1697 } 1698 EXPORT_SYMBOL(security_sock_graft); 1699 1700 int security_inet_conn_request(struct sock *sk, 1701 struct sk_buff *skb, struct request_sock *req) 1702 { 1703 return call_int_hook(inet_conn_request, 0, sk, skb, req); 1704 } 1705 EXPORT_SYMBOL(security_inet_conn_request); 1706 1707 void security_inet_csk_clone(struct sock *newsk, 1708 const struct request_sock *req) 1709 { 1710 call_void_hook(inet_csk_clone, newsk, req); 1711 } 1712 1713 void security_inet_conn_established(struct sock *sk, 1714 struct sk_buff *skb) 1715 { 1716 call_void_hook(inet_conn_established, sk, skb); 1717 } 1718 EXPORT_SYMBOL(security_inet_conn_established); 1719 1720 int security_secmark_relabel_packet(u32 secid) 1721 { 1722 return call_int_hook(secmark_relabel_packet, 0, secid); 1723 } 1724 EXPORT_SYMBOL(security_secmark_relabel_packet); 1725 1726 void security_secmark_refcount_inc(void) 1727 { 1728 call_void_hook(secmark_refcount_inc); 1729 } 1730 EXPORT_SYMBOL(security_secmark_refcount_inc); 1731 1732 void security_secmark_refcount_dec(void) 1733 { 1734 call_void_hook(secmark_refcount_dec); 1735 } 1736 EXPORT_SYMBOL(security_secmark_refcount_dec); 1737 1738 int security_tun_dev_alloc_security(void **security) 1739 { 1740 return call_int_hook(tun_dev_alloc_security, 0, security); 1741 } 1742 EXPORT_SYMBOL(security_tun_dev_alloc_security); 1743 1744 void security_tun_dev_free_security(void *security) 1745 { 1746 call_void_hook(tun_dev_free_security, security); 1747 } 1748 EXPORT_SYMBOL(security_tun_dev_free_security); 1749 1750 int security_tun_dev_create(void) 1751 { 1752 return call_int_hook(tun_dev_create, 0); 1753 } 1754 EXPORT_SYMBOL(security_tun_dev_create); 1755 1756 int security_tun_dev_attach_queue(void *security) 1757 { 1758 return call_int_hook(tun_dev_attach_queue, 0, security); 1759 } 1760 EXPORT_SYMBOL(security_tun_dev_attach_queue); 1761 1762 int security_tun_dev_attach(struct sock *sk, void *security) 1763 { 1764 return call_int_hook(tun_dev_attach, 0, sk, security); 1765 } 1766 EXPORT_SYMBOL(security_tun_dev_attach); 1767 1768 int security_tun_dev_open(void *security) 1769 { 1770 return call_int_hook(tun_dev_open, 0, security); 1771 } 1772 EXPORT_SYMBOL(security_tun_dev_open); 1773 1774 int security_sctp_assoc_request(struct sctp_endpoint *ep, struct sk_buff *skb) 1775 { 1776 return call_int_hook(sctp_assoc_request, 0, ep, skb); 1777 } 1778 EXPORT_SYMBOL(security_sctp_assoc_request); 1779 1780 int security_sctp_bind_connect(struct sock *sk, int optname, 1781 struct sockaddr *address, int addrlen) 1782 { 1783 return call_int_hook(sctp_bind_connect, 0, sk, optname, 1784 address, addrlen); 1785 } 1786 EXPORT_SYMBOL(security_sctp_bind_connect); 1787 1788 void security_sctp_sk_clone(struct sctp_endpoint *ep, struct sock *sk, 1789 struct sock *newsk) 1790 { 1791 call_void_hook(sctp_sk_clone, ep, sk, newsk); 1792 } 1793 EXPORT_SYMBOL(security_sctp_sk_clone); 1794 1795 #endif /* CONFIG_SECURITY_NETWORK */ 1796 1797 #ifdef CONFIG_SECURITY_INFINIBAND 1798 1799 int security_ib_pkey_access(void *sec, u64 subnet_prefix, u16 pkey) 1800 { 1801 return call_int_hook(ib_pkey_access, 0, sec, subnet_prefix, pkey); 1802 } 1803 EXPORT_SYMBOL(security_ib_pkey_access); 1804 1805 int security_ib_endport_manage_subnet(void *sec, const char *dev_name, u8 port_num) 1806 { 1807 return call_int_hook(ib_endport_manage_subnet, 0, sec, dev_name, port_num); 1808 } 1809 EXPORT_SYMBOL(security_ib_endport_manage_subnet); 1810 1811 int security_ib_alloc_security(void **sec) 1812 { 1813 return call_int_hook(ib_alloc_security, 0, sec); 1814 } 1815 EXPORT_SYMBOL(security_ib_alloc_security); 1816 1817 void security_ib_free_security(void *sec) 1818 { 1819 call_void_hook(ib_free_security, sec); 1820 } 1821 EXPORT_SYMBOL(security_ib_free_security); 1822 #endif /* CONFIG_SECURITY_INFINIBAND */ 1823 1824 #ifdef CONFIG_SECURITY_NETWORK_XFRM 1825 1826 int security_xfrm_policy_alloc(struct xfrm_sec_ctx **ctxp, 1827 struct xfrm_user_sec_ctx *sec_ctx, 1828 gfp_t gfp) 1829 { 1830 return call_int_hook(xfrm_policy_alloc_security, 0, ctxp, sec_ctx, gfp); 1831 } 1832 EXPORT_SYMBOL(security_xfrm_policy_alloc); 1833 1834 int security_xfrm_policy_clone(struct xfrm_sec_ctx *old_ctx, 1835 struct xfrm_sec_ctx **new_ctxp) 1836 { 1837 return call_int_hook(xfrm_policy_clone_security, 0, old_ctx, new_ctxp); 1838 } 1839 1840 void security_xfrm_policy_free(struct xfrm_sec_ctx *ctx) 1841 { 1842 call_void_hook(xfrm_policy_free_security, ctx); 1843 } 1844 EXPORT_SYMBOL(security_xfrm_policy_free); 1845 1846 int security_xfrm_policy_delete(struct xfrm_sec_ctx *ctx) 1847 { 1848 return call_int_hook(xfrm_policy_delete_security, 0, ctx); 1849 } 1850 1851 int security_xfrm_state_alloc(struct xfrm_state *x, 1852 struct xfrm_user_sec_ctx *sec_ctx) 1853 { 1854 return call_int_hook(xfrm_state_alloc, 0, x, sec_ctx); 1855 } 1856 EXPORT_SYMBOL(security_xfrm_state_alloc); 1857 1858 int security_xfrm_state_alloc_acquire(struct xfrm_state *x, 1859 struct xfrm_sec_ctx *polsec, u32 secid) 1860 { 1861 return call_int_hook(xfrm_state_alloc_acquire, 0, x, polsec, secid); 1862 } 1863 1864 int security_xfrm_state_delete(struct xfrm_state *x) 1865 { 1866 return call_int_hook(xfrm_state_delete_security, 0, x); 1867 } 1868 EXPORT_SYMBOL(security_xfrm_state_delete); 1869 1870 void security_xfrm_state_free(struct xfrm_state *x) 1871 { 1872 call_void_hook(xfrm_state_free_security, x); 1873 } 1874 1875 int security_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir) 1876 { 1877 return call_int_hook(xfrm_policy_lookup, 0, ctx, fl_secid, dir); 1878 } 1879 1880 int security_xfrm_state_pol_flow_match(struct xfrm_state *x, 1881 struct xfrm_policy *xp, 1882 const struct flowi *fl) 1883 { 1884 struct security_hook_list *hp; 1885 int rc = 1; 1886 1887 /* 1888 * Since this function is expected to return 0 or 1, the judgment 1889 * becomes difficult if multiple LSMs supply this call. Fortunately, 1890 * we can use the first LSM's judgment because currently only SELinux 1891 * supplies this call. 1892 * 1893 * For speed optimization, we explicitly break the loop rather than 1894 * using the macro 1895 */ 1896 hlist_for_each_entry(hp, &security_hook_heads.xfrm_state_pol_flow_match, 1897 list) { 1898 rc = hp->hook.xfrm_state_pol_flow_match(x, xp, fl); 1899 break; 1900 } 1901 return rc; 1902 } 1903 1904 int security_xfrm_decode_session(struct sk_buff *skb, u32 *secid) 1905 { 1906 return call_int_hook(xfrm_decode_session, 0, skb, secid, 1); 1907 } 1908 1909 void security_skb_classify_flow(struct sk_buff *skb, struct flowi *fl) 1910 { 1911 int rc = call_int_hook(xfrm_decode_session, 0, skb, &fl->flowi_secid, 1912 0); 1913 1914 BUG_ON(rc); 1915 } 1916 EXPORT_SYMBOL(security_skb_classify_flow); 1917 1918 #endif /* CONFIG_SECURITY_NETWORK_XFRM */ 1919 1920 #ifdef CONFIG_KEYS 1921 1922 int security_key_alloc(struct key *key, const struct cred *cred, 1923 unsigned long flags) 1924 { 1925 return call_int_hook(key_alloc, 0, key, cred, flags); 1926 } 1927 1928 void security_key_free(struct key *key) 1929 { 1930 call_void_hook(key_free, key); 1931 } 1932 1933 int security_key_permission(key_ref_t key_ref, 1934 const struct cred *cred, unsigned perm) 1935 { 1936 return call_int_hook(key_permission, 0, key_ref, cred, perm); 1937 } 1938 1939 int security_key_getsecurity(struct key *key, char **_buffer) 1940 { 1941 *_buffer = NULL; 1942 return call_int_hook(key_getsecurity, 0, key, _buffer); 1943 } 1944 1945 #endif /* CONFIG_KEYS */ 1946 1947 #ifdef CONFIG_AUDIT 1948 1949 int security_audit_rule_init(u32 field, u32 op, char *rulestr, void **lsmrule) 1950 { 1951 return call_int_hook(audit_rule_init, 0, field, op, rulestr, lsmrule); 1952 } 1953 1954 int security_audit_rule_known(struct audit_krule *krule) 1955 { 1956 return call_int_hook(audit_rule_known, 0, krule); 1957 } 1958 1959 void security_audit_rule_free(void *lsmrule) 1960 { 1961 call_void_hook(audit_rule_free, lsmrule); 1962 } 1963 1964 int security_audit_rule_match(u32 secid, u32 field, u32 op, void *lsmrule, 1965 struct audit_context *actx) 1966 { 1967 return call_int_hook(audit_rule_match, 0, secid, field, op, lsmrule, 1968 actx); 1969 } 1970 #endif /* CONFIG_AUDIT */ 1971 1972 #ifdef CONFIG_BPF_SYSCALL 1973 int security_bpf(int cmd, union bpf_attr *attr, unsigned int size) 1974 { 1975 return call_int_hook(bpf, 0, cmd, attr, size); 1976 } 1977 int security_bpf_map(struct bpf_map *map, fmode_t fmode) 1978 { 1979 return call_int_hook(bpf_map, 0, map, fmode); 1980 } 1981 int security_bpf_prog(struct bpf_prog *prog) 1982 { 1983 return call_int_hook(bpf_prog, 0, prog); 1984 } 1985 int security_bpf_map_alloc(struct bpf_map *map) 1986 { 1987 return call_int_hook(bpf_map_alloc_security, 0, map); 1988 } 1989 int security_bpf_prog_alloc(struct bpf_prog_aux *aux) 1990 { 1991 return call_int_hook(bpf_prog_alloc_security, 0, aux); 1992 } 1993 void security_bpf_map_free(struct bpf_map *map) 1994 { 1995 call_void_hook(bpf_map_free_security, map); 1996 } 1997 void security_bpf_prog_free(struct bpf_prog_aux *aux) 1998 { 1999 call_void_hook(bpf_prog_free_security, aux); 2000 } 2001 #endif /* CONFIG_BPF_SYSCALL */ 2002