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 <linux/msg.h> 34 #include <net/flow.h> 35 36 #define MAX_LSM_EVM_XATTR 2 37 38 /* How many LSMs were built into the kernel? */ 39 #define LSM_COUNT (__end_lsm_info - __start_lsm_info) 40 41 struct security_hook_heads security_hook_heads __lsm_ro_after_init; 42 static BLOCKING_NOTIFIER_HEAD(blocking_lsm_notifier_chain); 43 44 static struct kmem_cache *lsm_file_cache; 45 static struct kmem_cache *lsm_inode_cache; 46 47 char *lsm_names; 48 static struct lsm_blob_sizes blob_sizes __lsm_ro_after_init; 49 50 /* Boot-time LSM user choice */ 51 static __initdata const char *chosen_lsm_order; 52 static __initdata const char *chosen_major_lsm; 53 54 static __initconst const char * const builtin_lsm_order = CONFIG_LSM; 55 56 /* Ordered list of LSMs to initialize. */ 57 static __initdata struct lsm_info **ordered_lsms; 58 static __initdata struct lsm_info *exclusive; 59 60 static __initdata bool debug; 61 #define init_debug(...) \ 62 do { \ 63 if (debug) \ 64 pr_info(__VA_ARGS__); \ 65 } while (0) 66 67 static bool __init is_enabled(struct lsm_info *lsm) 68 { 69 if (!lsm->enabled) 70 return false; 71 72 return *lsm->enabled; 73 } 74 75 /* Mark an LSM's enabled flag. */ 76 static int lsm_enabled_true __initdata = 1; 77 static int lsm_enabled_false __initdata = 0; 78 static void __init set_enabled(struct lsm_info *lsm, bool enabled) 79 { 80 /* 81 * When an LSM hasn't configured an enable variable, we can use 82 * a hard-coded location for storing the default enabled state. 83 */ 84 if (!lsm->enabled) { 85 if (enabled) 86 lsm->enabled = &lsm_enabled_true; 87 else 88 lsm->enabled = &lsm_enabled_false; 89 } else if (lsm->enabled == &lsm_enabled_true) { 90 if (!enabled) 91 lsm->enabled = &lsm_enabled_false; 92 } else if (lsm->enabled == &lsm_enabled_false) { 93 if (enabled) 94 lsm->enabled = &lsm_enabled_true; 95 } else { 96 *lsm->enabled = enabled; 97 } 98 } 99 100 /* Is an LSM already listed in the ordered LSMs list? */ 101 static bool __init exists_ordered_lsm(struct lsm_info *lsm) 102 { 103 struct lsm_info **check; 104 105 for (check = ordered_lsms; *check; check++) 106 if (*check == lsm) 107 return true; 108 109 return false; 110 } 111 112 /* Append an LSM to the list of ordered LSMs to initialize. */ 113 static int last_lsm __initdata; 114 static void __init append_ordered_lsm(struct lsm_info *lsm, const char *from) 115 { 116 /* Ignore duplicate selections. */ 117 if (exists_ordered_lsm(lsm)) 118 return; 119 120 if (WARN(last_lsm == LSM_COUNT, "%s: out of LSM slots!?\n", from)) 121 return; 122 123 /* Enable this LSM, if it is not already set. */ 124 if (!lsm->enabled) 125 lsm->enabled = &lsm_enabled_true; 126 ordered_lsms[last_lsm++] = lsm; 127 128 init_debug("%s ordering: %s (%sabled)\n", from, lsm->name, 129 is_enabled(lsm) ? "en" : "dis"); 130 } 131 132 /* Is an LSM allowed to be initialized? */ 133 static bool __init lsm_allowed(struct lsm_info *lsm) 134 { 135 /* Skip if the LSM is disabled. */ 136 if (!is_enabled(lsm)) 137 return false; 138 139 /* Not allowed if another exclusive LSM already initialized. */ 140 if ((lsm->flags & LSM_FLAG_EXCLUSIVE) && exclusive) { 141 init_debug("exclusive disabled: %s\n", lsm->name); 142 return false; 143 } 144 145 return true; 146 } 147 148 static void __init lsm_set_blob_size(int *need, int *lbs) 149 { 150 int offset; 151 152 if (*need > 0) { 153 offset = *lbs; 154 *lbs += *need; 155 *need = offset; 156 } 157 } 158 159 static void __init lsm_set_blob_sizes(struct lsm_blob_sizes *needed) 160 { 161 if (!needed) 162 return; 163 164 lsm_set_blob_size(&needed->lbs_cred, &blob_sizes.lbs_cred); 165 lsm_set_blob_size(&needed->lbs_file, &blob_sizes.lbs_file); 166 /* 167 * The inode blob gets an rcu_head in addition to 168 * what the modules might need. 169 */ 170 if (needed->lbs_inode && blob_sizes.lbs_inode == 0) 171 blob_sizes.lbs_inode = sizeof(struct rcu_head); 172 lsm_set_blob_size(&needed->lbs_inode, &blob_sizes.lbs_inode); 173 lsm_set_blob_size(&needed->lbs_ipc, &blob_sizes.lbs_ipc); 174 lsm_set_blob_size(&needed->lbs_msg_msg, &blob_sizes.lbs_msg_msg); 175 lsm_set_blob_size(&needed->lbs_task, &blob_sizes.lbs_task); 176 } 177 178 /* Prepare LSM for initialization. */ 179 static void __init prepare_lsm(struct lsm_info *lsm) 180 { 181 int enabled = lsm_allowed(lsm); 182 183 /* Record enablement (to handle any following exclusive LSMs). */ 184 set_enabled(lsm, enabled); 185 186 /* If enabled, do pre-initialization work. */ 187 if (enabled) { 188 if ((lsm->flags & LSM_FLAG_EXCLUSIVE) && !exclusive) { 189 exclusive = lsm; 190 init_debug("exclusive chosen: %s\n", lsm->name); 191 } 192 193 lsm_set_blob_sizes(lsm->blobs); 194 } 195 } 196 197 /* Initialize a given LSM, if it is enabled. */ 198 static void __init initialize_lsm(struct lsm_info *lsm) 199 { 200 if (is_enabled(lsm)) { 201 int ret; 202 203 init_debug("initializing %s\n", lsm->name); 204 ret = lsm->init(); 205 WARN(ret, "%s failed to initialize: %d\n", lsm->name, ret); 206 } 207 } 208 209 /* Populate ordered LSMs list from comma-separated LSM name list. */ 210 static void __init ordered_lsm_parse(const char *order, const char *origin) 211 { 212 struct lsm_info *lsm; 213 char *sep, *name, *next; 214 215 /* LSM_ORDER_FIRST is always first. */ 216 for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) { 217 if (lsm->order == LSM_ORDER_FIRST) 218 append_ordered_lsm(lsm, "first"); 219 } 220 221 /* Process "security=", if given. */ 222 if (chosen_major_lsm) { 223 struct lsm_info *major; 224 225 /* 226 * To match the original "security=" behavior, this 227 * explicitly does NOT fallback to another Legacy Major 228 * if the selected one was separately disabled: disable 229 * all non-matching Legacy Major LSMs. 230 */ 231 for (major = __start_lsm_info; major < __end_lsm_info; 232 major++) { 233 if ((major->flags & LSM_FLAG_LEGACY_MAJOR) && 234 strcmp(major->name, chosen_major_lsm) != 0) { 235 set_enabled(major, false); 236 init_debug("security=%s disabled: %s\n", 237 chosen_major_lsm, major->name); 238 } 239 } 240 } 241 242 sep = kstrdup(order, GFP_KERNEL); 243 next = sep; 244 /* Walk the list, looking for matching LSMs. */ 245 while ((name = strsep(&next, ",")) != NULL) { 246 bool found = false; 247 248 for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) { 249 if (lsm->order == LSM_ORDER_MUTABLE && 250 strcmp(lsm->name, name) == 0) { 251 append_ordered_lsm(lsm, origin); 252 found = true; 253 } 254 } 255 256 if (!found) 257 init_debug("%s ignored: %s\n", origin, name); 258 } 259 260 /* Process "security=", if given. */ 261 if (chosen_major_lsm) { 262 for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) { 263 if (exists_ordered_lsm(lsm)) 264 continue; 265 if (strcmp(lsm->name, chosen_major_lsm) == 0) 266 append_ordered_lsm(lsm, "security="); 267 } 268 } 269 270 /* Disable all LSMs not in the ordered list. */ 271 for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) { 272 if (exists_ordered_lsm(lsm)) 273 continue; 274 set_enabled(lsm, false); 275 init_debug("%s disabled: %s\n", origin, lsm->name); 276 } 277 278 kfree(sep); 279 } 280 281 static void __init lsm_early_cred(struct cred *cred); 282 static void __init lsm_early_task(struct task_struct *task); 283 284 static void __init ordered_lsm_init(void) 285 { 286 struct lsm_info **lsm; 287 288 ordered_lsms = kcalloc(LSM_COUNT + 1, sizeof(*ordered_lsms), 289 GFP_KERNEL); 290 291 if (chosen_lsm_order) { 292 if (chosen_major_lsm) { 293 pr_info("security= is ignored because it is superseded by lsm=\n"); 294 chosen_major_lsm = NULL; 295 } 296 ordered_lsm_parse(chosen_lsm_order, "cmdline"); 297 } else 298 ordered_lsm_parse(builtin_lsm_order, "builtin"); 299 300 for (lsm = ordered_lsms; *lsm; lsm++) 301 prepare_lsm(*lsm); 302 303 init_debug("cred blob size = %d\n", blob_sizes.lbs_cred); 304 init_debug("file blob size = %d\n", blob_sizes.lbs_file); 305 init_debug("inode blob size = %d\n", blob_sizes.lbs_inode); 306 init_debug("ipc blob size = %d\n", blob_sizes.lbs_ipc); 307 init_debug("msg_msg blob size = %d\n", blob_sizes.lbs_msg_msg); 308 init_debug("task blob size = %d\n", blob_sizes.lbs_task); 309 310 /* 311 * Create any kmem_caches needed for blobs 312 */ 313 if (blob_sizes.lbs_file) 314 lsm_file_cache = kmem_cache_create("lsm_file_cache", 315 blob_sizes.lbs_file, 0, 316 SLAB_PANIC, NULL); 317 if (blob_sizes.lbs_inode) 318 lsm_inode_cache = kmem_cache_create("lsm_inode_cache", 319 blob_sizes.lbs_inode, 0, 320 SLAB_PANIC, NULL); 321 322 lsm_early_cred((struct cred *) current->cred); 323 lsm_early_task(current); 324 for (lsm = ordered_lsms; *lsm; lsm++) 325 initialize_lsm(*lsm); 326 327 kfree(ordered_lsms); 328 } 329 330 /** 331 * security_init - initializes the security framework 332 * 333 * This should be called early in the kernel initialization sequence. 334 */ 335 int __init security_init(void) 336 { 337 int i; 338 struct hlist_head *list = (struct hlist_head *) &security_hook_heads; 339 340 pr_info("Security Framework initializing\n"); 341 342 for (i = 0; i < sizeof(security_hook_heads) / sizeof(struct hlist_head); 343 i++) 344 INIT_HLIST_HEAD(&list[i]); 345 346 /* Load LSMs in specified order. */ 347 ordered_lsm_init(); 348 349 return 0; 350 } 351 352 /* Save user chosen LSM */ 353 static int __init choose_major_lsm(char *str) 354 { 355 chosen_major_lsm = str; 356 return 1; 357 } 358 __setup("security=", choose_major_lsm); 359 360 /* Explicitly choose LSM initialization order. */ 361 static int __init choose_lsm_order(char *str) 362 { 363 chosen_lsm_order = str; 364 return 1; 365 } 366 __setup("lsm=", choose_lsm_order); 367 368 /* Enable LSM order debugging. */ 369 static int __init enable_debug(char *str) 370 { 371 debug = true; 372 return 1; 373 } 374 __setup("lsm.debug", enable_debug); 375 376 static bool match_last_lsm(const char *list, const char *lsm) 377 { 378 const char *last; 379 380 if (WARN_ON(!list || !lsm)) 381 return false; 382 last = strrchr(list, ','); 383 if (last) 384 /* Pass the comma, strcmp() will check for '\0' */ 385 last++; 386 else 387 last = list; 388 return !strcmp(last, lsm); 389 } 390 391 static int lsm_append(char *new, char **result) 392 { 393 char *cp; 394 395 if (*result == NULL) { 396 *result = kstrdup(new, GFP_KERNEL); 397 if (*result == NULL) 398 return -ENOMEM; 399 } else { 400 /* Check if it is the last registered name */ 401 if (match_last_lsm(*result, new)) 402 return 0; 403 cp = kasprintf(GFP_KERNEL, "%s,%s", *result, new); 404 if (cp == NULL) 405 return -ENOMEM; 406 kfree(*result); 407 *result = cp; 408 } 409 return 0; 410 } 411 412 /** 413 * security_add_hooks - Add a modules hooks to the hook lists. 414 * @hooks: the hooks to add 415 * @count: the number of hooks to add 416 * @lsm: the name of the security module 417 * 418 * Each LSM has to register its hooks with the infrastructure. 419 */ 420 void __init security_add_hooks(struct security_hook_list *hooks, int count, 421 char *lsm) 422 { 423 int i; 424 425 for (i = 0; i < count; i++) { 426 hooks[i].lsm = lsm; 427 hlist_add_tail_rcu(&hooks[i].list, hooks[i].head); 428 } 429 if (lsm_append(lsm, &lsm_names) < 0) 430 panic("%s - Cannot get early memory.\n", __func__); 431 } 432 433 int call_blocking_lsm_notifier(enum lsm_event event, void *data) 434 { 435 return blocking_notifier_call_chain(&blocking_lsm_notifier_chain, 436 event, data); 437 } 438 EXPORT_SYMBOL(call_blocking_lsm_notifier); 439 440 int register_blocking_lsm_notifier(struct notifier_block *nb) 441 { 442 return blocking_notifier_chain_register(&blocking_lsm_notifier_chain, 443 nb); 444 } 445 EXPORT_SYMBOL(register_blocking_lsm_notifier); 446 447 int unregister_blocking_lsm_notifier(struct notifier_block *nb) 448 { 449 return blocking_notifier_chain_unregister(&blocking_lsm_notifier_chain, 450 nb); 451 } 452 EXPORT_SYMBOL(unregister_blocking_lsm_notifier); 453 454 /** 455 * lsm_cred_alloc - allocate a composite cred blob 456 * @cred: the cred that needs a blob 457 * @gfp: allocation type 458 * 459 * Allocate the cred blob for all the modules 460 * 461 * Returns 0, or -ENOMEM if memory can't be allocated. 462 */ 463 static int lsm_cred_alloc(struct cred *cred, gfp_t gfp) 464 { 465 if (blob_sizes.lbs_cred == 0) { 466 cred->security = NULL; 467 return 0; 468 } 469 470 cred->security = kzalloc(blob_sizes.lbs_cred, gfp); 471 if (cred->security == NULL) 472 return -ENOMEM; 473 return 0; 474 } 475 476 /** 477 * lsm_early_cred - during initialization allocate a composite cred blob 478 * @cred: the cred that needs a blob 479 * 480 * Allocate the cred blob for all the modules 481 */ 482 static void __init lsm_early_cred(struct cred *cred) 483 { 484 int rc = lsm_cred_alloc(cred, GFP_KERNEL); 485 486 if (rc) 487 panic("%s: Early cred alloc failed.\n", __func__); 488 } 489 490 /** 491 * lsm_file_alloc - allocate a composite file blob 492 * @file: the file that needs a blob 493 * 494 * Allocate the file blob for all the modules 495 * 496 * Returns 0, or -ENOMEM if memory can't be allocated. 497 */ 498 static int lsm_file_alloc(struct file *file) 499 { 500 if (!lsm_file_cache) { 501 file->f_security = NULL; 502 return 0; 503 } 504 505 file->f_security = kmem_cache_zalloc(lsm_file_cache, GFP_KERNEL); 506 if (file->f_security == NULL) 507 return -ENOMEM; 508 return 0; 509 } 510 511 /** 512 * lsm_inode_alloc - allocate a composite inode blob 513 * @inode: the inode that needs a blob 514 * 515 * Allocate the inode blob for all the modules 516 * 517 * Returns 0, or -ENOMEM if memory can't be allocated. 518 */ 519 int lsm_inode_alloc(struct inode *inode) 520 { 521 if (!lsm_inode_cache) { 522 inode->i_security = NULL; 523 return 0; 524 } 525 526 inode->i_security = kmem_cache_zalloc(lsm_inode_cache, GFP_NOFS); 527 if (inode->i_security == NULL) 528 return -ENOMEM; 529 return 0; 530 } 531 532 /** 533 * lsm_task_alloc - allocate a composite task blob 534 * @task: the task that needs a blob 535 * 536 * Allocate the task blob for all the modules 537 * 538 * Returns 0, or -ENOMEM if memory can't be allocated. 539 */ 540 static int lsm_task_alloc(struct task_struct *task) 541 { 542 if (blob_sizes.lbs_task == 0) { 543 task->security = NULL; 544 return 0; 545 } 546 547 task->security = kzalloc(blob_sizes.lbs_task, GFP_KERNEL); 548 if (task->security == NULL) 549 return -ENOMEM; 550 return 0; 551 } 552 553 /** 554 * lsm_ipc_alloc - allocate a composite ipc blob 555 * @kip: the ipc that needs a blob 556 * 557 * Allocate the ipc blob for all the modules 558 * 559 * Returns 0, or -ENOMEM if memory can't be allocated. 560 */ 561 static int lsm_ipc_alloc(struct kern_ipc_perm *kip) 562 { 563 if (blob_sizes.lbs_ipc == 0) { 564 kip->security = NULL; 565 return 0; 566 } 567 568 kip->security = kzalloc(blob_sizes.lbs_ipc, GFP_KERNEL); 569 if (kip->security == NULL) 570 return -ENOMEM; 571 return 0; 572 } 573 574 /** 575 * lsm_msg_msg_alloc - allocate a composite msg_msg blob 576 * @mp: the msg_msg that needs a blob 577 * 578 * Allocate the ipc blob for all the modules 579 * 580 * Returns 0, or -ENOMEM if memory can't be allocated. 581 */ 582 static int lsm_msg_msg_alloc(struct msg_msg *mp) 583 { 584 if (blob_sizes.lbs_msg_msg == 0) { 585 mp->security = NULL; 586 return 0; 587 } 588 589 mp->security = kzalloc(blob_sizes.lbs_msg_msg, GFP_KERNEL); 590 if (mp->security == NULL) 591 return -ENOMEM; 592 return 0; 593 } 594 595 /** 596 * lsm_early_task - during initialization allocate a composite task blob 597 * @task: the task that needs a blob 598 * 599 * Allocate the task blob for all the modules 600 */ 601 static void __init lsm_early_task(struct task_struct *task) 602 { 603 int rc = lsm_task_alloc(task); 604 605 if (rc) 606 panic("%s: Early task alloc failed.\n", __func__); 607 } 608 609 /* 610 * Hook list operation macros. 611 * 612 * call_void_hook: 613 * This is a hook that does not return a value. 614 * 615 * call_int_hook: 616 * This is a hook that returns a value. 617 */ 618 619 #define call_void_hook(FUNC, ...) \ 620 do { \ 621 struct security_hook_list *P; \ 622 \ 623 hlist_for_each_entry(P, &security_hook_heads.FUNC, list) \ 624 P->hook.FUNC(__VA_ARGS__); \ 625 } while (0) 626 627 #define call_int_hook(FUNC, IRC, ...) ({ \ 628 int RC = IRC; \ 629 do { \ 630 struct security_hook_list *P; \ 631 \ 632 hlist_for_each_entry(P, &security_hook_heads.FUNC, list) { \ 633 RC = P->hook.FUNC(__VA_ARGS__); \ 634 if (RC != 0) \ 635 break; \ 636 } \ 637 } while (0); \ 638 RC; \ 639 }) 640 641 /* Security operations */ 642 643 int security_binder_set_context_mgr(struct task_struct *mgr) 644 { 645 return call_int_hook(binder_set_context_mgr, 0, mgr); 646 } 647 648 int security_binder_transaction(struct task_struct *from, 649 struct task_struct *to) 650 { 651 return call_int_hook(binder_transaction, 0, from, to); 652 } 653 654 int security_binder_transfer_binder(struct task_struct *from, 655 struct task_struct *to) 656 { 657 return call_int_hook(binder_transfer_binder, 0, from, to); 658 } 659 660 int security_binder_transfer_file(struct task_struct *from, 661 struct task_struct *to, struct file *file) 662 { 663 return call_int_hook(binder_transfer_file, 0, from, to, file); 664 } 665 666 int security_ptrace_access_check(struct task_struct *child, unsigned int mode) 667 { 668 return call_int_hook(ptrace_access_check, 0, child, mode); 669 } 670 671 int security_ptrace_traceme(struct task_struct *parent) 672 { 673 return call_int_hook(ptrace_traceme, 0, parent); 674 } 675 676 int security_capget(struct task_struct *target, 677 kernel_cap_t *effective, 678 kernel_cap_t *inheritable, 679 kernel_cap_t *permitted) 680 { 681 return call_int_hook(capget, 0, target, 682 effective, inheritable, permitted); 683 } 684 685 int security_capset(struct cred *new, const struct cred *old, 686 const kernel_cap_t *effective, 687 const kernel_cap_t *inheritable, 688 const kernel_cap_t *permitted) 689 { 690 return call_int_hook(capset, 0, new, old, 691 effective, inheritable, permitted); 692 } 693 694 int security_capable(const struct cred *cred, 695 struct user_namespace *ns, 696 int cap, 697 unsigned int opts) 698 { 699 return call_int_hook(capable, 0, cred, ns, cap, opts); 700 } 701 702 int security_quotactl(int cmds, int type, int id, struct super_block *sb) 703 { 704 return call_int_hook(quotactl, 0, cmds, type, id, sb); 705 } 706 707 int security_quota_on(struct dentry *dentry) 708 { 709 return call_int_hook(quota_on, 0, dentry); 710 } 711 712 int security_syslog(int type) 713 { 714 return call_int_hook(syslog, 0, type); 715 } 716 717 int security_settime64(const struct timespec64 *ts, const struct timezone *tz) 718 { 719 return call_int_hook(settime, 0, ts, tz); 720 } 721 722 int security_vm_enough_memory_mm(struct mm_struct *mm, long pages) 723 { 724 struct security_hook_list *hp; 725 int cap_sys_admin = 1; 726 int rc; 727 728 /* 729 * The module will respond with a positive value if 730 * it thinks the __vm_enough_memory() call should be 731 * made with the cap_sys_admin set. If all of the modules 732 * agree that it should be set it will. If any module 733 * thinks it should not be set it won't. 734 */ 735 hlist_for_each_entry(hp, &security_hook_heads.vm_enough_memory, list) { 736 rc = hp->hook.vm_enough_memory(mm, pages); 737 if (rc <= 0) { 738 cap_sys_admin = 0; 739 break; 740 } 741 } 742 return __vm_enough_memory(mm, pages, cap_sys_admin); 743 } 744 745 int security_bprm_set_creds(struct linux_binprm *bprm) 746 { 747 return call_int_hook(bprm_set_creds, 0, bprm); 748 } 749 750 int security_bprm_check(struct linux_binprm *bprm) 751 { 752 int ret; 753 754 ret = call_int_hook(bprm_check_security, 0, bprm); 755 if (ret) 756 return ret; 757 return ima_bprm_check(bprm); 758 } 759 760 void security_bprm_committing_creds(struct linux_binprm *bprm) 761 { 762 call_void_hook(bprm_committing_creds, bprm); 763 } 764 765 void security_bprm_committed_creds(struct linux_binprm *bprm) 766 { 767 call_void_hook(bprm_committed_creds, bprm); 768 } 769 770 int security_fs_context_dup(struct fs_context *fc, struct fs_context *src_fc) 771 { 772 return call_int_hook(fs_context_dup, 0, fc, src_fc); 773 } 774 775 int security_fs_context_parse_param(struct fs_context *fc, struct fs_parameter *param) 776 { 777 return call_int_hook(fs_context_parse_param, -ENOPARAM, fc, param); 778 } 779 780 int security_sb_alloc(struct super_block *sb) 781 { 782 return call_int_hook(sb_alloc_security, 0, sb); 783 } 784 785 void security_sb_free(struct super_block *sb) 786 { 787 call_void_hook(sb_free_security, sb); 788 } 789 790 void security_free_mnt_opts(void **mnt_opts) 791 { 792 if (!*mnt_opts) 793 return; 794 call_void_hook(sb_free_mnt_opts, *mnt_opts); 795 *mnt_opts = NULL; 796 } 797 EXPORT_SYMBOL(security_free_mnt_opts); 798 799 int security_sb_eat_lsm_opts(char *options, void **mnt_opts) 800 { 801 return call_int_hook(sb_eat_lsm_opts, 0, options, mnt_opts); 802 } 803 EXPORT_SYMBOL(security_sb_eat_lsm_opts); 804 805 int security_sb_remount(struct super_block *sb, 806 void *mnt_opts) 807 { 808 return call_int_hook(sb_remount, 0, sb, mnt_opts); 809 } 810 EXPORT_SYMBOL(security_sb_remount); 811 812 int security_sb_kern_mount(struct super_block *sb) 813 { 814 return call_int_hook(sb_kern_mount, 0, sb); 815 } 816 817 int security_sb_show_options(struct seq_file *m, struct super_block *sb) 818 { 819 return call_int_hook(sb_show_options, 0, m, sb); 820 } 821 822 int security_sb_statfs(struct dentry *dentry) 823 { 824 return call_int_hook(sb_statfs, 0, dentry); 825 } 826 827 int security_sb_mount(const char *dev_name, const struct path *path, 828 const char *type, unsigned long flags, void *data) 829 { 830 return call_int_hook(sb_mount, 0, dev_name, path, type, flags, data); 831 } 832 833 int security_sb_umount(struct vfsmount *mnt, int flags) 834 { 835 return call_int_hook(sb_umount, 0, mnt, flags); 836 } 837 838 int security_sb_pivotroot(const struct path *old_path, const struct path *new_path) 839 { 840 return call_int_hook(sb_pivotroot, 0, old_path, new_path); 841 } 842 843 int security_sb_set_mnt_opts(struct super_block *sb, 844 void *mnt_opts, 845 unsigned long kern_flags, 846 unsigned long *set_kern_flags) 847 { 848 return call_int_hook(sb_set_mnt_opts, 849 mnt_opts ? -EOPNOTSUPP : 0, sb, 850 mnt_opts, kern_flags, set_kern_flags); 851 } 852 EXPORT_SYMBOL(security_sb_set_mnt_opts); 853 854 int security_sb_clone_mnt_opts(const struct super_block *oldsb, 855 struct super_block *newsb, 856 unsigned long kern_flags, 857 unsigned long *set_kern_flags) 858 { 859 return call_int_hook(sb_clone_mnt_opts, 0, oldsb, newsb, 860 kern_flags, set_kern_flags); 861 } 862 EXPORT_SYMBOL(security_sb_clone_mnt_opts); 863 864 int security_add_mnt_opt(const char *option, const char *val, int len, 865 void **mnt_opts) 866 { 867 return call_int_hook(sb_add_mnt_opt, -EINVAL, 868 option, val, len, mnt_opts); 869 } 870 EXPORT_SYMBOL(security_add_mnt_opt); 871 872 int security_move_mount(const struct path *from_path, const struct path *to_path) 873 { 874 return call_int_hook(move_mount, 0, from_path, to_path); 875 } 876 877 int security_inode_alloc(struct inode *inode) 878 { 879 int rc = lsm_inode_alloc(inode); 880 881 if (unlikely(rc)) 882 return rc; 883 rc = call_int_hook(inode_alloc_security, 0, inode); 884 if (unlikely(rc)) 885 security_inode_free(inode); 886 return rc; 887 } 888 889 static void inode_free_by_rcu(struct rcu_head *head) 890 { 891 /* 892 * The rcu head is at the start of the inode blob 893 */ 894 kmem_cache_free(lsm_inode_cache, head); 895 } 896 897 void security_inode_free(struct inode *inode) 898 { 899 integrity_inode_free(inode); 900 call_void_hook(inode_free_security, inode); 901 /* 902 * The inode may still be referenced in a path walk and 903 * a call to security_inode_permission() can be made 904 * after inode_free_security() is called. Ideally, the VFS 905 * wouldn't do this, but fixing that is a much harder 906 * job. For now, simply free the i_security via RCU, and 907 * leave the current inode->i_security pointer intact. 908 * The inode will be freed after the RCU grace period too. 909 */ 910 if (inode->i_security) 911 call_rcu((struct rcu_head *)inode->i_security, 912 inode_free_by_rcu); 913 } 914 915 int security_dentry_init_security(struct dentry *dentry, int mode, 916 const struct qstr *name, void **ctx, 917 u32 *ctxlen) 918 { 919 return call_int_hook(dentry_init_security, -EOPNOTSUPP, dentry, mode, 920 name, ctx, ctxlen); 921 } 922 EXPORT_SYMBOL(security_dentry_init_security); 923 924 int security_dentry_create_files_as(struct dentry *dentry, int mode, 925 struct qstr *name, 926 const struct cred *old, struct cred *new) 927 { 928 return call_int_hook(dentry_create_files_as, 0, dentry, mode, 929 name, old, new); 930 } 931 EXPORT_SYMBOL(security_dentry_create_files_as); 932 933 int security_inode_init_security(struct inode *inode, struct inode *dir, 934 const struct qstr *qstr, 935 const initxattrs initxattrs, void *fs_data) 936 { 937 struct xattr new_xattrs[MAX_LSM_EVM_XATTR + 1]; 938 struct xattr *lsm_xattr, *evm_xattr, *xattr; 939 int ret; 940 941 if (unlikely(IS_PRIVATE(inode))) 942 return 0; 943 944 if (!initxattrs) 945 return call_int_hook(inode_init_security, -EOPNOTSUPP, inode, 946 dir, qstr, NULL, NULL, NULL); 947 memset(new_xattrs, 0, sizeof(new_xattrs)); 948 lsm_xattr = new_xattrs; 949 ret = call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir, qstr, 950 &lsm_xattr->name, 951 &lsm_xattr->value, 952 &lsm_xattr->value_len); 953 if (ret) 954 goto out; 955 956 evm_xattr = lsm_xattr + 1; 957 ret = evm_inode_init_security(inode, lsm_xattr, evm_xattr); 958 if (ret) 959 goto out; 960 ret = initxattrs(inode, new_xattrs, fs_data); 961 out: 962 for (xattr = new_xattrs; xattr->value != NULL; xattr++) 963 kfree(xattr->value); 964 return (ret == -EOPNOTSUPP) ? 0 : ret; 965 } 966 EXPORT_SYMBOL(security_inode_init_security); 967 968 int security_old_inode_init_security(struct inode *inode, struct inode *dir, 969 const struct qstr *qstr, const char **name, 970 void **value, size_t *len) 971 { 972 if (unlikely(IS_PRIVATE(inode))) 973 return -EOPNOTSUPP; 974 return call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir, 975 qstr, name, value, len); 976 } 977 EXPORT_SYMBOL(security_old_inode_init_security); 978 979 #ifdef CONFIG_SECURITY_PATH 980 int security_path_mknod(const struct path *dir, struct dentry *dentry, umode_t mode, 981 unsigned int dev) 982 { 983 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) 984 return 0; 985 return call_int_hook(path_mknod, 0, dir, dentry, mode, dev); 986 } 987 EXPORT_SYMBOL(security_path_mknod); 988 989 int security_path_mkdir(const struct path *dir, struct dentry *dentry, umode_t mode) 990 { 991 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) 992 return 0; 993 return call_int_hook(path_mkdir, 0, dir, dentry, mode); 994 } 995 EXPORT_SYMBOL(security_path_mkdir); 996 997 int security_path_rmdir(const struct path *dir, struct dentry *dentry) 998 { 999 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) 1000 return 0; 1001 return call_int_hook(path_rmdir, 0, dir, dentry); 1002 } 1003 1004 int security_path_unlink(const struct path *dir, struct dentry *dentry) 1005 { 1006 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) 1007 return 0; 1008 return call_int_hook(path_unlink, 0, dir, dentry); 1009 } 1010 EXPORT_SYMBOL(security_path_unlink); 1011 1012 int security_path_symlink(const struct path *dir, struct dentry *dentry, 1013 const char *old_name) 1014 { 1015 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) 1016 return 0; 1017 return call_int_hook(path_symlink, 0, dir, dentry, old_name); 1018 } 1019 1020 int security_path_link(struct dentry *old_dentry, const struct path *new_dir, 1021 struct dentry *new_dentry) 1022 { 1023 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)))) 1024 return 0; 1025 return call_int_hook(path_link, 0, old_dentry, new_dir, new_dentry); 1026 } 1027 1028 int security_path_rename(const struct path *old_dir, struct dentry *old_dentry, 1029 const struct path *new_dir, struct dentry *new_dentry, 1030 unsigned int flags) 1031 { 1032 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) || 1033 (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry))))) 1034 return 0; 1035 1036 if (flags & RENAME_EXCHANGE) { 1037 int err = call_int_hook(path_rename, 0, new_dir, new_dentry, 1038 old_dir, old_dentry); 1039 if (err) 1040 return err; 1041 } 1042 1043 return call_int_hook(path_rename, 0, old_dir, old_dentry, new_dir, 1044 new_dentry); 1045 } 1046 EXPORT_SYMBOL(security_path_rename); 1047 1048 int security_path_truncate(const struct path *path) 1049 { 1050 if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry)))) 1051 return 0; 1052 return call_int_hook(path_truncate, 0, path); 1053 } 1054 1055 int security_path_chmod(const struct path *path, umode_t mode) 1056 { 1057 if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry)))) 1058 return 0; 1059 return call_int_hook(path_chmod, 0, path, mode); 1060 } 1061 1062 int security_path_chown(const struct path *path, kuid_t uid, kgid_t gid) 1063 { 1064 if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry)))) 1065 return 0; 1066 return call_int_hook(path_chown, 0, path, uid, gid); 1067 } 1068 1069 int security_path_chroot(const struct path *path) 1070 { 1071 return call_int_hook(path_chroot, 0, path); 1072 } 1073 #endif 1074 1075 int security_inode_create(struct inode *dir, struct dentry *dentry, umode_t mode) 1076 { 1077 if (unlikely(IS_PRIVATE(dir))) 1078 return 0; 1079 return call_int_hook(inode_create, 0, dir, dentry, mode); 1080 } 1081 EXPORT_SYMBOL_GPL(security_inode_create); 1082 1083 int security_inode_link(struct dentry *old_dentry, struct inode *dir, 1084 struct dentry *new_dentry) 1085 { 1086 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)))) 1087 return 0; 1088 return call_int_hook(inode_link, 0, old_dentry, dir, new_dentry); 1089 } 1090 1091 int security_inode_unlink(struct inode *dir, struct dentry *dentry) 1092 { 1093 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 1094 return 0; 1095 return call_int_hook(inode_unlink, 0, dir, dentry); 1096 } 1097 1098 int security_inode_symlink(struct inode *dir, struct dentry *dentry, 1099 const char *old_name) 1100 { 1101 if (unlikely(IS_PRIVATE(dir))) 1102 return 0; 1103 return call_int_hook(inode_symlink, 0, dir, dentry, old_name); 1104 } 1105 1106 int security_inode_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) 1107 { 1108 if (unlikely(IS_PRIVATE(dir))) 1109 return 0; 1110 return call_int_hook(inode_mkdir, 0, dir, dentry, mode); 1111 } 1112 EXPORT_SYMBOL_GPL(security_inode_mkdir); 1113 1114 int security_inode_rmdir(struct inode *dir, struct dentry *dentry) 1115 { 1116 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 1117 return 0; 1118 return call_int_hook(inode_rmdir, 0, dir, dentry); 1119 } 1120 1121 int security_inode_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t dev) 1122 { 1123 if (unlikely(IS_PRIVATE(dir))) 1124 return 0; 1125 return call_int_hook(inode_mknod, 0, dir, dentry, mode, dev); 1126 } 1127 1128 int security_inode_rename(struct inode *old_dir, struct dentry *old_dentry, 1129 struct inode *new_dir, struct dentry *new_dentry, 1130 unsigned int flags) 1131 { 1132 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) || 1133 (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry))))) 1134 return 0; 1135 1136 if (flags & RENAME_EXCHANGE) { 1137 int err = call_int_hook(inode_rename, 0, new_dir, new_dentry, 1138 old_dir, old_dentry); 1139 if (err) 1140 return err; 1141 } 1142 1143 return call_int_hook(inode_rename, 0, old_dir, old_dentry, 1144 new_dir, new_dentry); 1145 } 1146 1147 int security_inode_readlink(struct dentry *dentry) 1148 { 1149 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 1150 return 0; 1151 return call_int_hook(inode_readlink, 0, dentry); 1152 } 1153 1154 int security_inode_follow_link(struct dentry *dentry, struct inode *inode, 1155 bool rcu) 1156 { 1157 if (unlikely(IS_PRIVATE(inode))) 1158 return 0; 1159 return call_int_hook(inode_follow_link, 0, dentry, inode, rcu); 1160 } 1161 1162 int security_inode_permission(struct inode *inode, int mask) 1163 { 1164 if (unlikely(IS_PRIVATE(inode))) 1165 return 0; 1166 return call_int_hook(inode_permission, 0, inode, mask); 1167 } 1168 1169 int security_inode_setattr(struct dentry *dentry, struct iattr *attr) 1170 { 1171 int ret; 1172 1173 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 1174 return 0; 1175 ret = call_int_hook(inode_setattr, 0, dentry, attr); 1176 if (ret) 1177 return ret; 1178 return evm_inode_setattr(dentry, attr); 1179 } 1180 EXPORT_SYMBOL_GPL(security_inode_setattr); 1181 1182 int security_inode_getattr(const struct path *path) 1183 { 1184 if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry)))) 1185 return 0; 1186 return call_int_hook(inode_getattr, 0, path); 1187 } 1188 1189 int security_inode_setxattr(struct dentry *dentry, const char *name, 1190 const void *value, size_t size, int flags) 1191 { 1192 int ret; 1193 1194 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 1195 return 0; 1196 /* 1197 * SELinux and Smack integrate the cap call, 1198 * so assume that all LSMs supplying this call do so. 1199 */ 1200 ret = call_int_hook(inode_setxattr, 1, dentry, name, value, size, 1201 flags); 1202 1203 if (ret == 1) 1204 ret = cap_inode_setxattr(dentry, name, value, size, flags); 1205 if (ret) 1206 return ret; 1207 ret = ima_inode_setxattr(dentry, name, value, size); 1208 if (ret) 1209 return ret; 1210 return evm_inode_setxattr(dentry, name, value, size); 1211 } 1212 1213 void security_inode_post_setxattr(struct dentry *dentry, const char *name, 1214 const void *value, size_t size, int flags) 1215 { 1216 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 1217 return; 1218 call_void_hook(inode_post_setxattr, dentry, name, value, size, flags); 1219 evm_inode_post_setxattr(dentry, name, value, size); 1220 } 1221 1222 int security_inode_getxattr(struct dentry *dentry, const char *name) 1223 { 1224 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 1225 return 0; 1226 return call_int_hook(inode_getxattr, 0, dentry, name); 1227 } 1228 1229 int security_inode_listxattr(struct dentry *dentry) 1230 { 1231 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 1232 return 0; 1233 return call_int_hook(inode_listxattr, 0, dentry); 1234 } 1235 1236 int security_inode_removexattr(struct dentry *dentry, const char *name) 1237 { 1238 int ret; 1239 1240 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 1241 return 0; 1242 /* 1243 * SELinux and Smack integrate the cap call, 1244 * so assume that all LSMs supplying this call do so. 1245 */ 1246 ret = call_int_hook(inode_removexattr, 1, dentry, name); 1247 if (ret == 1) 1248 ret = cap_inode_removexattr(dentry, name); 1249 if (ret) 1250 return ret; 1251 ret = ima_inode_removexattr(dentry, name); 1252 if (ret) 1253 return ret; 1254 return evm_inode_removexattr(dentry, name); 1255 } 1256 1257 int security_inode_need_killpriv(struct dentry *dentry) 1258 { 1259 return call_int_hook(inode_need_killpriv, 0, dentry); 1260 } 1261 1262 int security_inode_killpriv(struct dentry *dentry) 1263 { 1264 return call_int_hook(inode_killpriv, 0, dentry); 1265 } 1266 1267 int security_inode_getsecurity(struct inode *inode, const char *name, void **buffer, bool alloc) 1268 { 1269 struct security_hook_list *hp; 1270 int rc; 1271 1272 if (unlikely(IS_PRIVATE(inode))) 1273 return -EOPNOTSUPP; 1274 /* 1275 * Only one module will provide an attribute with a given name. 1276 */ 1277 hlist_for_each_entry(hp, &security_hook_heads.inode_getsecurity, list) { 1278 rc = hp->hook.inode_getsecurity(inode, name, buffer, alloc); 1279 if (rc != -EOPNOTSUPP) 1280 return rc; 1281 } 1282 return -EOPNOTSUPP; 1283 } 1284 1285 int security_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags) 1286 { 1287 struct security_hook_list *hp; 1288 int rc; 1289 1290 if (unlikely(IS_PRIVATE(inode))) 1291 return -EOPNOTSUPP; 1292 /* 1293 * Only one module will provide an attribute with a given name. 1294 */ 1295 hlist_for_each_entry(hp, &security_hook_heads.inode_setsecurity, list) { 1296 rc = hp->hook.inode_setsecurity(inode, name, value, size, 1297 flags); 1298 if (rc != -EOPNOTSUPP) 1299 return rc; 1300 } 1301 return -EOPNOTSUPP; 1302 } 1303 1304 int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size) 1305 { 1306 if (unlikely(IS_PRIVATE(inode))) 1307 return 0; 1308 return call_int_hook(inode_listsecurity, 0, inode, buffer, buffer_size); 1309 } 1310 EXPORT_SYMBOL(security_inode_listsecurity); 1311 1312 void security_inode_getsecid(struct inode *inode, u32 *secid) 1313 { 1314 call_void_hook(inode_getsecid, inode, secid); 1315 } 1316 1317 int security_inode_copy_up(struct dentry *src, struct cred **new) 1318 { 1319 return call_int_hook(inode_copy_up, 0, src, new); 1320 } 1321 EXPORT_SYMBOL(security_inode_copy_up); 1322 1323 int security_inode_copy_up_xattr(const char *name) 1324 { 1325 return call_int_hook(inode_copy_up_xattr, -EOPNOTSUPP, name); 1326 } 1327 EXPORT_SYMBOL(security_inode_copy_up_xattr); 1328 1329 int security_kernfs_init_security(struct kernfs_node *kn_dir, 1330 struct kernfs_node *kn) 1331 { 1332 return call_int_hook(kernfs_init_security, 0, kn_dir, kn); 1333 } 1334 1335 int security_file_permission(struct file *file, int mask) 1336 { 1337 int ret; 1338 1339 ret = call_int_hook(file_permission, 0, file, mask); 1340 if (ret) 1341 return ret; 1342 1343 return fsnotify_perm(file, mask); 1344 } 1345 1346 int security_file_alloc(struct file *file) 1347 { 1348 int rc = lsm_file_alloc(file); 1349 1350 if (rc) 1351 return rc; 1352 rc = call_int_hook(file_alloc_security, 0, file); 1353 if (unlikely(rc)) 1354 security_file_free(file); 1355 return rc; 1356 } 1357 1358 void security_file_free(struct file *file) 1359 { 1360 void *blob; 1361 1362 call_void_hook(file_free_security, file); 1363 1364 blob = file->f_security; 1365 if (blob) { 1366 file->f_security = NULL; 1367 kmem_cache_free(lsm_file_cache, blob); 1368 } 1369 } 1370 1371 int security_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 1372 { 1373 return call_int_hook(file_ioctl, 0, file, cmd, arg); 1374 } 1375 1376 static inline unsigned long mmap_prot(struct file *file, unsigned long prot) 1377 { 1378 /* 1379 * Does we have PROT_READ and does the application expect 1380 * it to imply PROT_EXEC? If not, nothing to talk about... 1381 */ 1382 if ((prot & (PROT_READ | PROT_EXEC)) != PROT_READ) 1383 return prot; 1384 if (!(current->personality & READ_IMPLIES_EXEC)) 1385 return prot; 1386 /* 1387 * if that's an anonymous mapping, let it. 1388 */ 1389 if (!file) 1390 return prot | PROT_EXEC; 1391 /* 1392 * ditto if it's not on noexec mount, except that on !MMU we need 1393 * NOMMU_MAP_EXEC (== VM_MAYEXEC) in this case 1394 */ 1395 if (!path_noexec(&file->f_path)) { 1396 #ifndef CONFIG_MMU 1397 if (file->f_op->mmap_capabilities) { 1398 unsigned caps = file->f_op->mmap_capabilities(file); 1399 if (!(caps & NOMMU_MAP_EXEC)) 1400 return prot; 1401 } 1402 #endif 1403 return prot | PROT_EXEC; 1404 } 1405 /* anything on noexec mount won't get PROT_EXEC */ 1406 return prot; 1407 } 1408 1409 int security_mmap_file(struct file *file, unsigned long prot, 1410 unsigned long flags) 1411 { 1412 int ret; 1413 ret = call_int_hook(mmap_file, 0, file, prot, 1414 mmap_prot(file, prot), flags); 1415 if (ret) 1416 return ret; 1417 return ima_file_mmap(file, prot); 1418 } 1419 1420 int security_mmap_addr(unsigned long addr) 1421 { 1422 return call_int_hook(mmap_addr, 0, addr); 1423 } 1424 1425 int security_file_mprotect(struct vm_area_struct *vma, unsigned long reqprot, 1426 unsigned long prot) 1427 { 1428 return call_int_hook(file_mprotect, 0, vma, reqprot, prot); 1429 } 1430 1431 int security_file_lock(struct file *file, unsigned int cmd) 1432 { 1433 return call_int_hook(file_lock, 0, file, cmd); 1434 } 1435 1436 int security_file_fcntl(struct file *file, unsigned int cmd, unsigned long arg) 1437 { 1438 return call_int_hook(file_fcntl, 0, file, cmd, arg); 1439 } 1440 1441 void security_file_set_fowner(struct file *file) 1442 { 1443 call_void_hook(file_set_fowner, file); 1444 } 1445 1446 int security_file_send_sigiotask(struct task_struct *tsk, 1447 struct fown_struct *fown, int sig) 1448 { 1449 return call_int_hook(file_send_sigiotask, 0, tsk, fown, sig); 1450 } 1451 1452 int security_file_receive(struct file *file) 1453 { 1454 return call_int_hook(file_receive, 0, file); 1455 } 1456 1457 int security_file_open(struct file *file) 1458 { 1459 int ret; 1460 1461 ret = call_int_hook(file_open, 0, file); 1462 if (ret) 1463 return ret; 1464 1465 return fsnotify_perm(file, MAY_OPEN); 1466 } 1467 1468 int security_task_alloc(struct task_struct *task, unsigned long clone_flags) 1469 { 1470 int rc = lsm_task_alloc(task); 1471 1472 if (rc) 1473 return rc; 1474 rc = call_int_hook(task_alloc, 0, task, clone_flags); 1475 if (unlikely(rc)) 1476 security_task_free(task); 1477 return rc; 1478 } 1479 1480 void security_task_free(struct task_struct *task) 1481 { 1482 call_void_hook(task_free, task); 1483 1484 kfree(task->security); 1485 task->security = NULL; 1486 } 1487 1488 int security_cred_alloc_blank(struct cred *cred, gfp_t gfp) 1489 { 1490 int rc = lsm_cred_alloc(cred, gfp); 1491 1492 if (rc) 1493 return rc; 1494 1495 rc = call_int_hook(cred_alloc_blank, 0, cred, gfp); 1496 if (unlikely(rc)) 1497 security_cred_free(cred); 1498 return rc; 1499 } 1500 1501 void security_cred_free(struct cred *cred) 1502 { 1503 /* 1504 * There is a failure case in prepare_creds() that 1505 * may result in a call here with ->security being NULL. 1506 */ 1507 if (unlikely(cred->security == NULL)) 1508 return; 1509 1510 call_void_hook(cred_free, cred); 1511 1512 kfree(cred->security); 1513 cred->security = NULL; 1514 } 1515 1516 int security_prepare_creds(struct cred *new, const struct cred *old, gfp_t gfp) 1517 { 1518 int rc = lsm_cred_alloc(new, gfp); 1519 1520 if (rc) 1521 return rc; 1522 1523 rc = call_int_hook(cred_prepare, 0, new, old, gfp); 1524 if (unlikely(rc)) 1525 security_cred_free(new); 1526 return rc; 1527 } 1528 1529 void security_transfer_creds(struct cred *new, const struct cred *old) 1530 { 1531 call_void_hook(cred_transfer, new, old); 1532 } 1533 1534 void security_cred_getsecid(const struct cred *c, u32 *secid) 1535 { 1536 *secid = 0; 1537 call_void_hook(cred_getsecid, c, secid); 1538 } 1539 EXPORT_SYMBOL(security_cred_getsecid); 1540 1541 int security_kernel_act_as(struct cred *new, u32 secid) 1542 { 1543 return call_int_hook(kernel_act_as, 0, new, secid); 1544 } 1545 1546 int security_kernel_create_files_as(struct cred *new, struct inode *inode) 1547 { 1548 return call_int_hook(kernel_create_files_as, 0, new, inode); 1549 } 1550 1551 int security_kernel_module_request(char *kmod_name) 1552 { 1553 int ret; 1554 1555 ret = call_int_hook(kernel_module_request, 0, kmod_name); 1556 if (ret) 1557 return ret; 1558 return integrity_kernel_module_request(kmod_name); 1559 } 1560 1561 int security_kernel_read_file(struct file *file, enum kernel_read_file_id id) 1562 { 1563 int ret; 1564 1565 ret = call_int_hook(kernel_read_file, 0, file, id); 1566 if (ret) 1567 return ret; 1568 return ima_read_file(file, id); 1569 } 1570 EXPORT_SYMBOL_GPL(security_kernel_read_file); 1571 1572 int security_kernel_post_read_file(struct file *file, char *buf, loff_t size, 1573 enum kernel_read_file_id id) 1574 { 1575 int ret; 1576 1577 ret = call_int_hook(kernel_post_read_file, 0, file, buf, size, id); 1578 if (ret) 1579 return ret; 1580 return ima_post_read_file(file, buf, size, id); 1581 } 1582 EXPORT_SYMBOL_GPL(security_kernel_post_read_file); 1583 1584 int security_kernel_load_data(enum kernel_load_data_id id) 1585 { 1586 int ret; 1587 1588 ret = call_int_hook(kernel_load_data, 0, id); 1589 if (ret) 1590 return ret; 1591 return ima_load_data(id); 1592 } 1593 EXPORT_SYMBOL_GPL(security_kernel_load_data); 1594 1595 int security_task_fix_setuid(struct cred *new, const struct cred *old, 1596 int flags) 1597 { 1598 return call_int_hook(task_fix_setuid, 0, new, old, flags); 1599 } 1600 1601 int security_task_setpgid(struct task_struct *p, pid_t pgid) 1602 { 1603 return call_int_hook(task_setpgid, 0, p, pgid); 1604 } 1605 1606 int security_task_getpgid(struct task_struct *p) 1607 { 1608 return call_int_hook(task_getpgid, 0, p); 1609 } 1610 1611 int security_task_getsid(struct task_struct *p) 1612 { 1613 return call_int_hook(task_getsid, 0, p); 1614 } 1615 1616 void security_task_getsecid(struct task_struct *p, u32 *secid) 1617 { 1618 *secid = 0; 1619 call_void_hook(task_getsecid, p, secid); 1620 } 1621 EXPORT_SYMBOL(security_task_getsecid); 1622 1623 int security_task_setnice(struct task_struct *p, int nice) 1624 { 1625 return call_int_hook(task_setnice, 0, p, nice); 1626 } 1627 1628 int security_task_setioprio(struct task_struct *p, int ioprio) 1629 { 1630 return call_int_hook(task_setioprio, 0, p, ioprio); 1631 } 1632 1633 int security_task_getioprio(struct task_struct *p) 1634 { 1635 return call_int_hook(task_getioprio, 0, p); 1636 } 1637 1638 int security_task_prlimit(const struct cred *cred, const struct cred *tcred, 1639 unsigned int flags) 1640 { 1641 return call_int_hook(task_prlimit, 0, cred, tcred, flags); 1642 } 1643 1644 int security_task_setrlimit(struct task_struct *p, unsigned int resource, 1645 struct rlimit *new_rlim) 1646 { 1647 return call_int_hook(task_setrlimit, 0, p, resource, new_rlim); 1648 } 1649 1650 int security_task_setscheduler(struct task_struct *p) 1651 { 1652 return call_int_hook(task_setscheduler, 0, p); 1653 } 1654 1655 int security_task_getscheduler(struct task_struct *p) 1656 { 1657 return call_int_hook(task_getscheduler, 0, p); 1658 } 1659 1660 int security_task_movememory(struct task_struct *p) 1661 { 1662 return call_int_hook(task_movememory, 0, p); 1663 } 1664 1665 int security_task_kill(struct task_struct *p, struct kernel_siginfo *info, 1666 int sig, const struct cred *cred) 1667 { 1668 return call_int_hook(task_kill, 0, p, info, sig, cred); 1669 } 1670 1671 int security_task_prctl(int option, unsigned long arg2, unsigned long arg3, 1672 unsigned long arg4, unsigned long arg5) 1673 { 1674 int thisrc; 1675 int rc = -ENOSYS; 1676 struct security_hook_list *hp; 1677 1678 hlist_for_each_entry(hp, &security_hook_heads.task_prctl, list) { 1679 thisrc = hp->hook.task_prctl(option, arg2, arg3, arg4, arg5); 1680 if (thisrc != -ENOSYS) { 1681 rc = thisrc; 1682 if (thisrc != 0) 1683 break; 1684 } 1685 } 1686 return rc; 1687 } 1688 1689 void security_task_to_inode(struct task_struct *p, struct inode *inode) 1690 { 1691 call_void_hook(task_to_inode, p, inode); 1692 } 1693 1694 int security_ipc_permission(struct kern_ipc_perm *ipcp, short flag) 1695 { 1696 return call_int_hook(ipc_permission, 0, ipcp, flag); 1697 } 1698 1699 void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid) 1700 { 1701 *secid = 0; 1702 call_void_hook(ipc_getsecid, ipcp, secid); 1703 } 1704 1705 int security_msg_msg_alloc(struct msg_msg *msg) 1706 { 1707 int rc = lsm_msg_msg_alloc(msg); 1708 1709 if (unlikely(rc)) 1710 return rc; 1711 rc = call_int_hook(msg_msg_alloc_security, 0, msg); 1712 if (unlikely(rc)) 1713 security_msg_msg_free(msg); 1714 return rc; 1715 } 1716 1717 void security_msg_msg_free(struct msg_msg *msg) 1718 { 1719 call_void_hook(msg_msg_free_security, msg); 1720 kfree(msg->security); 1721 msg->security = NULL; 1722 } 1723 1724 int security_msg_queue_alloc(struct kern_ipc_perm *msq) 1725 { 1726 int rc = lsm_ipc_alloc(msq); 1727 1728 if (unlikely(rc)) 1729 return rc; 1730 rc = call_int_hook(msg_queue_alloc_security, 0, msq); 1731 if (unlikely(rc)) 1732 security_msg_queue_free(msq); 1733 return rc; 1734 } 1735 1736 void security_msg_queue_free(struct kern_ipc_perm *msq) 1737 { 1738 call_void_hook(msg_queue_free_security, msq); 1739 kfree(msq->security); 1740 msq->security = NULL; 1741 } 1742 1743 int security_msg_queue_associate(struct kern_ipc_perm *msq, int msqflg) 1744 { 1745 return call_int_hook(msg_queue_associate, 0, msq, msqflg); 1746 } 1747 1748 int security_msg_queue_msgctl(struct kern_ipc_perm *msq, int cmd) 1749 { 1750 return call_int_hook(msg_queue_msgctl, 0, msq, cmd); 1751 } 1752 1753 int security_msg_queue_msgsnd(struct kern_ipc_perm *msq, 1754 struct msg_msg *msg, int msqflg) 1755 { 1756 return call_int_hook(msg_queue_msgsnd, 0, msq, msg, msqflg); 1757 } 1758 1759 int security_msg_queue_msgrcv(struct kern_ipc_perm *msq, struct msg_msg *msg, 1760 struct task_struct *target, long type, int mode) 1761 { 1762 return call_int_hook(msg_queue_msgrcv, 0, msq, msg, target, type, mode); 1763 } 1764 1765 int security_shm_alloc(struct kern_ipc_perm *shp) 1766 { 1767 int rc = lsm_ipc_alloc(shp); 1768 1769 if (unlikely(rc)) 1770 return rc; 1771 rc = call_int_hook(shm_alloc_security, 0, shp); 1772 if (unlikely(rc)) 1773 security_shm_free(shp); 1774 return rc; 1775 } 1776 1777 void security_shm_free(struct kern_ipc_perm *shp) 1778 { 1779 call_void_hook(shm_free_security, shp); 1780 kfree(shp->security); 1781 shp->security = NULL; 1782 } 1783 1784 int security_shm_associate(struct kern_ipc_perm *shp, int shmflg) 1785 { 1786 return call_int_hook(shm_associate, 0, shp, shmflg); 1787 } 1788 1789 int security_shm_shmctl(struct kern_ipc_perm *shp, int cmd) 1790 { 1791 return call_int_hook(shm_shmctl, 0, shp, cmd); 1792 } 1793 1794 int security_shm_shmat(struct kern_ipc_perm *shp, char __user *shmaddr, int shmflg) 1795 { 1796 return call_int_hook(shm_shmat, 0, shp, shmaddr, shmflg); 1797 } 1798 1799 int security_sem_alloc(struct kern_ipc_perm *sma) 1800 { 1801 int rc = lsm_ipc_alloc(sma); 1802 1803 if (unlikely(rc)) 1804 return rc; 1805 rc = call_int_hook(sem_alloc_security, 0, sma); 1806 if (unlikely(rc)) 1807 security_sem_free(sma); 1808 return rc; 1809 } 1810 1811 void security_sem_free(struct kern_ipc_perm *sma) 1812 { 1813 call_void_hook(sem_free_security, sma); 1814 kfree(sma->security); 1815 sma->security = NULL; 1816 } 1817 1818 int security_sem_associate(struct kern_ipc_perm *sma, int semflg) 1819 { 1820 return call_int_hook(sem_associate, 0, sma, semflg); 1821 } 1822 1823 int security_sem_semctl(struct kern_ipc_perm *sma, int cmd) 1824 { 1825 return call_int_hook(sem_semctl, 0, sma, cmd); 1826 } 1827 1828 int security_sem_semop(struct kern_ipc_perm *sma, struct sembuf *sops, 1829 unsigned nsops, int alter) 1830 { 1831 return call_int_hook(sem_semop, 0, sma, sops, nsops, alter); 1832 } 1833 1834 void security_d_instantiate(struct dentry *dentry, struct inode *inode) 1835 { 1836 if (unlikely(inode && IS_PRIVATE(inode))) 1837 return; 1838 call_void_hook(d_instantiate, dentry, inode); 1839 } 1840 EXPORT_SYMBOL(security_d_instantiate); 1841 1842 int security_getprocattr(struct task_struct *p, const char *lsm, char *name, 1843 char **value) 1844 { 1845 struct security_hook_list *hp; 1846 1847 hlist_for_each_entry(hp, &security_hook_heads.getprocattr, list) { 1848 if (lsm != NULL && strcmp(lsm, hp->lsm)) 1849 continue; 1850 return hp->hook.getprocattr(p, name, value); 1851 } 1852 return -EINVAL; 1853 } 1854 1855 int security_setprocattr(const char *lsm, const char *name, void *value, 1856 size_t size) 1857 { 1858 struct security_hook_list *hp; 1859 1860 hlist_for_each_entry(hp, &security_hook_heads.setprocattr, list) { 1861 if (lsm != NULL && strcmp(lsm, hp->lsm)) 1862 continue; 1863 return hp->hook.setprocattr(name, value, size); 1864 } 1865 return -EINVAL; 1866 } 1867 1868 int security_netlink_send(struct sock *sk, struct sk_buff *skb) 1869 { 1870 return call_int_hook(netlink_send, 0, sk, skb); 1871 } 1872 1873 int security_ismaclabel(const char *name) 1874 { 1875 return call_int_hook(ismaclabel, 0, name); 1876 } 1877 EXPORT_SYMBOL(security_ismaclabel); 1878 1879 int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen) 1880 { 1881 return call_int_hook(secid_to_secctx, -EOPNOTSUPP, secid, secdata, 1882 seclen); 1883 } 1884 EXPORT_SYMBOL(security_secid_to_secctx); 1885 1886 int security_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid) 1887 { 1888 *secid = 0; 1889 return call_int_hook(secctx_to_secid, 0, secdata, seclen, secid); 1890 } 1891 EXPORT_SYMBOL(security_secctx_to_secid); 1892 1893 void security_release_secctx(char *secdata, u32 seclen) 1894 { 1895 call_void_hook(release_secctx, secdata, seclen); 1896 } 1897 EXPORT_SYMBOL(security_release_secctx); 1898 1899 void security_inode_invalidate_secctx(struct inode *inode) 1900 { 1901 call_void_hook(inode_invalidate_secctx, inode); 1902 } 1903 EXPORT_SYMBOL(security_inode_invalidate_secctx); 1904 1905 int security_inode_notifysecctx(struct inode *inode, void *ctx, u32 ctxlen) 1906 { 1907 return call_int_hook(inode_notifysecctx, 0, inode, ctx, ctxlen); 1908 } 1909 EXPORT_SYMBOL(security_inode_notifysecctx); 1910 1911 int security_inode_setsecctx(struct dentry *dentry, void *ctx, u32 ctxlen) 1912 { 1913 return call_int_hook(inode_setsecctx, 0, dentry, ctx, ctxlen); 1914 } 1915 EXPORT_SYMBOL(security_inode_setsecctx); 1916 1917 int security_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen) 1918 { 1919 return call_int_hook(inode_getsecctx, -EOPNOTSUPP, inode, ctx, ctxlen); 1920 } 1921 EXPORT_SYMBOL(security_inode_getsecctx); 1922 1923 #ifdef CONFIG_SECURITY_NETWORK 1924 1925 int security_unix_stream_connect(struct sock *sock, struct sock *other, struct sock *newsk) 1926 { 1927 return call_int_hook(unix_stream_connect, 0, sock, other, newsk); 1928 } 1929 EXPORT_SYMBOL(security_unix_stream_connect); 1930 1931 int security_unix_may_send(struct socket *sock, struct socket *other) 1932 { 1933 return call_int_hook(unix_may_send, 0, sock, other); 1934 } 1935 EXPORT_SYMBOL(security_unix_may_send); 1936 1937 int security_socket_create(int family, int type, int protocol, int kern) 1938 { 1939 return call_int_hook(socket_create, 0, family, type, protocol, kern); 1940 } 1941 1942 int security_socket_post_create(struct socket *sock, int family, 1943 int type, int protocol, int kern) 1944 { 1945 return call_int_hook(socket_post_create, 0, sock, family, type, 1946 protocol, kern); 1947 } 1948 1949 int security_socket_socketpair(struct socket *socka, struct socket *sockb) 1950 { 1951 return call_int_hook(socket_socketpair, 0, socka, sockb); 1952 } 1953 EXPORT_SYMBOL(security_socket_socketpair); 1954 1955 int security_socket_bind(struct socket *sock, struct sockaddr *address, int addrlen) 1956 { 1957 return call_int_hook(socket_bind, 0, sock, address, addrlen); 1958 } 1959 1960 int security_socket_connect(struct socket *sock, struct sockaddr *address, int addrlen) 1961 { 1962 return call_int_hook(socket_connect, 0, sock, address, addrlen); 1963 } 1964 1965 int security_socket_listen(struct socket *sock, int backlog) 1966 { 1967 return call_int_hook(socket_listen, 0, sock, backlog); 1968 } 1969 1970 int security_socket_accept(struct socket *sock, struct socket *newsock) 1971 { 1972 return call_int_hook(socket_accept, 0, sock, newsock); 1973 } 1974 1975 int security_socket_sendmsg(struct socket *sock, struct msghdr *msg, int size) 1976 { 1977 return call_int_hook(socket_sendmsg, 0, sock, msg, size); 1978 } 1979 1980 int security_socket_recvmsg(struct socket *sock, struct msghdr *msg, 1981 int size, int flags) 1982 { 1983 return call_int_hook(socket_recvmsg, 0, sock, msg, size, flags); 1984 } 1985 1986 int security_socket_getsockname(struct socket *sock) 1987 { 1988 return call_int_hook(socket_getsockname, 0, sock); 1989 } 1990 1991 int security_socket_getpeername(struct socket *sock) 1992 { 1993 return call_int_hook(socket_getpeername, 0, sock); 1994 } 1995 1996 int security_socket_getsockopt(struct socket *sock, int level, int optname) 1997 { 1998 return call_int_hook(socket_getsockopt, 0, sock, level, optname); 1999 } 2000 2001 int security_socket_setsockopt(struct socket *sock, int level, int optname) 2002 { 2003 return call_int_hook(socket_setsockopt, 0, sock, level, optname); 2004 } 2005 2006 int security_socket_shutdown(struct socket *sock, int how) 2007 { 2008 return call_int_hook(socket_shutdown, 0, sock, how); 2009 } 2010 2011 int security_sock_rcv_skb(struct sock *sk, struct sk_buff *skb) 2012 { 2013 return call_int_hook(socket_sock_rcv_skb, 0, sk, skb); 2014 } 2015 EXPORT_SYMBOL(security_sock_rcv_skb); 2016 2017 int security_socket_getpeersec_stream(struct socket *sock, char __user *optval, 2018 int __user *optlen, unsigned len) 2019 { 2020 return call_int_hook(socket_getpeersec_stream, -ENOPROTOOPT, sock, 2021 optval, optlen, len); 2022 } 2023 2024 int security_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb, u32 *secid) 2025 { 2026 return call_int_hook(socket_getpeersec_dgram, -ENOPROTOOPT, sock, 2027 skb, secid); 2028 } 2029 EXPORT_SYMBOL(security_socket_getpeersec_dgram); 2030 2031 int security_sk_alloc(struct sock *sk, int family, gfp_t priority) 2032 { 2033 return call_int_hook(sk_alloc_security, 0, sk, family, priority); 2034 } 2035 2036 void security_sk_free(struct sock *sk) 2037 { 2038 call_void_hook(sk_free_security, sk); 2039 } 2040 2041 void security_sk_clone(const struct sock *sk, struct sock *newsk) 2042 { 2043 call_void_hook(sk_clone_security, sk, newsk); 2044 } 2045 EXPORT_SYMBOL(security_sk_clone); 2046 2047 void security_sk_classify_flow(struct sock *sk, struct flowi *fl) 2048 { 2049 call_void_hook(sk_getsecid, sk, &fl->flowi_secid); 2050 } 2051 EXPORT_SYMBOL(security_sk_classify_flow); 2052 2053 void security_req_classify_flow(const struct request_sock *req, struct flowi *fl) 2054 { 2055 call_void_hook(req_classify_flow, req, fl); 2056 } 2057 EXPORT_SYMBOL(security_req_classify_flow); 2058 2059 void security_sock_graft(struct sock *sk, struct socket *parent) 2060 { 2061 call_void_hook(sock_graft, sk, parent); 2062 } 2063 EXPORT_SYMBOL(security_sock_graft); 2064 2065 int security_inet_conn_request(struct sock *sk, 2066 struct sk_buff *skb, struct request_sock *req) 2067 { 2068 return call_int_hook(inet_conn_request, 0, sk, skb, req); 2069 } 2070 EXPORT_SYMBOL(security_inet_conn_request); 2071 2072 void security_inet_csk_clone(struct sock *newsk, 2073 const struct request_sock *req) 2074 { 2075 call_void_hook(inet_csk_clone, newsk, req); 2076 } 2077 2078 void security_inet_conn_established(struct sock *sk, 2079 struct sk_buff *skb) 2080 { 2081 call_void_hook(inet_conn_established, sk, skb); 2082 } 2083 EXPORT_SYMBOL(security_inet_conn_established); 2084 2085 int security_secmark_relabel_packet(u32 secid) 2086 { 2087 return call_int_hook(secmark_relabel_packet, 0, secid); 2088 } 2089 EXPORT_SYMBOL(security_secmark_relabel_packet); 2090 2091 void security_secmark_refcount_inc(void) 2092 { 2093 call_void_hook(secmark_refcount_inc); 2094 } 2095 EXPORT_SYMBOL(security_secmark_refcount_inc); 2096 2097 void security_secmark_refcount_dec(void) 2098 { 2099 call_void_hook(secmark_refcount_dec); 2100 } 2101 EXPORT_SYMBOL(security_secmark_refcount_dec); 2102 2103 int security_tun_dev_alloc_security(void **security) 2104 { 2105 return call_int_hook(tun_dev_alloc_security, 0, security); 2106 } 2107 EXPORT_SYMBOL(security_tun_dev_alloc_security); 2108 2109 void security_tun_dev_free_security(void *security) 2110 { 2111 call_void_hook(tun_dev_free_security, security); 2112 } 2113 EXPORT_SYMBOL(security_tun_dev_free_security); 2114 2115 int security_tun_dev_create(void) 2116 { 2117 return call_int_hook(tun_dev_create, 0); 2118 } 2119 EXPORT_SYMBOL(security_tun_dev_create); 2120 2121 int security_tun_dev_attach_queue(void *security) 2122 { 2123 return call_int_hook(tun_dev_attach_queue, 0, security); 2124 } 2125 EXPORT_SYMBOL(security_tun_dev_attach_queue); 2126 2127 int security_tun_dev_attach(struct sock *sk, void *security) 2128 { 2129 return call_int_hook(tun_dev_attach, 0, sk, security); 2130 } 2131 EXPORT_SYMBOL(security_tun_dev_attach); 2132 2133 int security_tun_dev_open(void *security) 2134 { 2135 return call_int_hook(tun_dev_open, 0, security); 2136 } 2137 EXPORT_SYMBOL(security_tun_dev_open); 2138 2139 int security_sctp_assoc_request(struct sctp_endpoint *ep, struct sk_buff *skb) 2140 { 2141 return call_int_hook(sctp_assoc_request, 0, ep, skb); 2142 } 2143 EXPORT_SYMBOL(security_sctp_assoc_request); 2144 2145 int security_sctp_bind_connect(struct sock *sk, int optname, 2146 struct sockaddr *address, int addrlen) 2147 { 2148 return call_int_hook(sctp_bind_connect, 0, sk, optname, 2149 address, addrlen); 2150 } 2151 EXPORT_SYMBOL(security_sctp_bind_connect); 2152 2153 void security_sctp_sk_clone(struct sctp_endpoint *ep, struct sock *sk, 2154 struct sock *newsk) 2155 { 2156 call_void_hook(sctp_sk_clone, ep, sk, newsk); 2157 } 2158 EXPORT_SYMBOL(security_sctp_sk_clone); 2159 2160 #endif /* CONFIG_SECURITY_NETWORK */ 2161 2162 #ifdef CONFIG_SECURITY_INFINIBAND 2163 2164 int security_ib_pkey_access(void *sec, u64 subnet_prefix, u16 pkey) 2165 { 2166 return call_int_hook(ib_pkey_access, 0, sec, subnet_prefix, pkey); 2167 } 2168 EXPORT_SYMBOL(security_ib_pkey_access); 2169 2170 int security_ib_endport_manage_subnet(void *sec, const char *dev_name, u8 port_num) 2171 { 2172 return call_int_hook(ib_endport_manage_subnet, 0, sec, dev_name, port_num); 2173 } 2174 EXPORT_SYMBOL(security_ib_endport_manage_subnet); 2175 2176 int security_ib_alloc_security(void **sec) 2177 { 2178 return call_int_hook(ib_alloc_security, 0, sec); 2179 } 2180 EXPORT_SYMBOL(security_ib_alloc_security); 2181 2182 void security_ib_free_security(void *sec) 2183 { 2184 call_void_hook(ib_free_security, sec); 2185 } 2186 EXPORT_SYMBOL(security_ib_free_security); 2187 #endif /* CONFIG_SECURITY_INFINIBAND */ 2188 2189 #ifdef CONFIG_SECURITY_NETWORK_XFRM 2190 2191 int security_xfrm_policy_alloc(struct xfrm_sec_ctx **ctxp, 2192 struct xfrm_user_sec_ctx *sec_ctx, 2193 gfp_t gfp) 2194 { 2195 return call_int_hook(xfrm_policy_alloc_security, 0, ctxp, sec_ctx, gfp); 2196 } 2197 EXPORT_SYMBOL(security_xfrm_policy_alloc); 2198 2199 int security_xfrm_policy_clone(struct xfrm_sec_ctx *old_ctx, 2200 struct xfrm_sec_ctx **new_ctxp) 2201 { 2202 return call_int_hook(xfrm_policy_clone_security, 0, old_ctx, new_ctxp); 2203 } 2204 2205 void security_xfrm_policy_free(struct xfrm_sec_ctx *ctx) 2206 { 2207 call_void_hook(xfrm_policy_free_security, ctx); 2208 } 2209 EXPORT_SYMBOL(security_xfrm_policy_free); 2210 2211 int security_xfrm_policy_delete(struct xfrm_sec_ctx *ctx) 2212 { 2213 return call_int_hook(xfrm_policy_delete_security, 0, ctx); 2214 } 2215 2216 int security_xfrm_state_alloc(struct xfrm_state *x, 2217 struct xfrm_user_sec_ctx *sec_ctx) 2218 { 2219 return call_int_hook(xfrm_state_alloc, 0, x, sec_ctx); 2220 } 2221 EXPORT_SYMBOL(security_xfrm_state_alloc); 2222 2223 int security_xfrm_state_alloc_acquire(struct xfrm_state *x, 2224 struct xfrm_sec_ctx *polsec, u32 secid) 2225 { 2226 return call_int_hook(xfrm_state_alloc_acquire, 0, x, polsec, secid); 2227 } 2228 2229 int security_xfrm_state_delete(struct xfrm_state *x) 2230 { 2231 return call_int_hook(xfrm_state_delete_security, 0, x); 2232 } 2233 EXPORT_SYMBOL(security_xfrm_state_delete); 2234 2235 void security_xfrm_state_free(struct xfrm_state *x) 2236 { 2237 call_void_hook(xfrm_state_free_security, x); 2238 } 2239 2240 int security_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir) 2241 { 2242 return call_int_hook(xfrm_policy_lookup, 0, ctx, fl_secid, dir); 2243 } 2244 2245 int security_xfrm_state_pol_flow_match(struct xfrm_state *x, 2246 struct xfrm_policy *xp, 2247 const struct flowi *fl) 2248 { 2249 struct security_hook_list *hp; 2250 int rc = 1; 2251 2252 /* 2253 * Since this function is expected to return 0 or 1, the judgment 2254 * becomes difficult if multiple LSMs supply this call. Fortunately, 2255 * we can use the first LSM's judgment because currently only SELinux 2256 * supplies this call. 2257 * 2258 * For speed optimization, we explicitly break the loop rather than 2259 * using the macro 2260 */ 2261 hlist_for_each_entry(hp, &security_hook_heads.xfrm_state_pol_flow_match, 2262 list) { 2263 rc = hp->hook.xfrm_state_pol_flow_match(x, xp, fl); 2264 break; 2265 } 2266 return rc; 2267 } 2268 2269 int security_xfrm_decode_session(struct sk_buff *skb, u32 *secid) 2270 { 2271 return call_int_hook(xfrm_decode_session, 0, skb, secid, 1); 2272 } 2273 2274 void security_skb_classify_flow(struct sk_buff *skb, struct flowi *fl) 2275 { 2276 int rc = call_int_hook(xfrm_decode_session, 0, skb, &fl->flowi_secid, 2277 0); 2278 2279 BUG_ON(rc); 2280 } 2281 EXPORT_SYMBOL(security_skb_classify_flow); 2282 2283 #endif /* CONFIG_SECURITY_NETWORK_XFRM */ 2284 2285 #ifdef CONFIG_KEYS 2286 2287 int security_key_alloc(struct key *key, const struct cred *cred, 2288 unsigned long flags) 2289 { 2290 return call_int_hook(key_alloc, 0, key, cred, flags); 2291 } 2292 2293 void security_key_free(struct key *key) 2294 { 2295 call_void_hook(key_free, key); 2296 } 2297 2298 int security_key_permission(key_ref_t key_ref, 2299 const struct cred *cred, unsigned perm) 2300 { 2301 return call_int_hook(key_permission, 0, key_ref, cred, perm); 2302 } 2303 2304 int security_key_getsecurity(struct key *key, char **_buffer) 2305 { 2306 *_buffer = NULL; 2307 return call_int_hook(key_getsecurity, 0, key, _buffer); 2308 } 2309 2310 #endif /* CONFIG_KEYS */ 2311 2312 #ifdef CONFIG_AUDIT 2313 2314 int security_audit_rule_init(u32 field, u32 op, char *rulestr, void **lsmrule) 2315 { 2316 return call_int_hook(audit_rule_init, 0, field, op, rulestr, lsmrule); 2317 } 2318 2319 int security_audit_rule_known(struct audit_krule *krule) 2320 { 2321 return call_int_hook(audit_rule_known, 0, krule); 2322 } 2323 2324 void security_audit_rule_free(void *lsmrule) 2325 { 2326 call_void_hook(audit_rule_free, lsmrule); 2327 } 2328 2329 int security_audit_rule_match(u32 secid, u32 field, u32 op, void *lsmrule) 2330 { 2331 return call_int_hook(audit_rule_match, 0, secid, field, op, lsmrule); 2332 } 2333 #endif /* CONFIG_AUDIT */ 2334 2335 #ifdef CONFIG_BPF_SYSCALL 2336 int security_bpf(int cmd, union bpf_attr *attr, unsigned int size) 2337 { 2338 return call_int_hook(bpf, 0, cmd, attr, size); 2339 } 2340 int security_bpf_map(struct bpf_map *map, fmode_t fmode) 2341 { 2342 return call_int_hook(bpf_map, 0, map, fmode); 2343 } 2344 int security_bpf_prog(struct bpf_prog *prog) 2345 { 2346 return call_int_hook(bpf_prog, 0, prog); 2347 } 2348 int security_bpf_map_alloc(struct bpf_map *map) 2349 { 2350 return call_int_hook(bpf_map_alloc_security, 0, map); 2351 } 2352 int security_bpf_prog_alloc(struct bpf_prog_aux *aux) 2353 { 2354 return call_int_hook(bpf_prog_alloc_security, 0, aux); 2355 } 2356 void security_bpf_map_free(struct bpf_map *map) 2357 { 2358 call_void_hook(bpf_map_free_security, map); 2359 } 2360 void security_bpf_prog_free(struct bpf_prog_aux *aux) 2361 { 2362 call_void_hook(bpf_prog_free_security, aux); 2363 } 2364 #endif /* CONFIG_BPF_SYSCALL */ 2365