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/module.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 /* Maximum number of letters for an LSM name string */ 38 #define SECURITY_NAME_MAX 10 39 40 struct security_hook_heads security_hook_heads __lsm_ro_after_init; 41 static ATOMIC_NOTIFIER_HEAD(lsm_notifier_chain); 42 43 char *lsm_names; 44 /* Boot-time LSM user choice */ 45 static __initdata char chosen_lsm[SECURITY_NAME_MAX + 1] = 46 CONFIG_DEFAULT_SECURITY; 47 48 static __initdata bool debug; 49 #define init_debug(...) \ 50 do { \ 51 if (debug) \ 52 pr_info(__VA_ARGS__); \ 53 } while (0) 54 55 static void __init major_lsm_init(void) 56 { 57 struct lsm_info *lsm; 58 int ret; 59 60 for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) { 61 init_debug("initializing %s\n", lsm->name); 62 ret = lsm->init(); 63 WARN(ret, "%s failed to initialize: %d\n", lsm->name, ret); 64 } 65 } 66 67 /** 68 * security_init - initializes the security framework 69 * 70 * This should be called early in the kernel initialization sequence. 71 */ 72 int __init security_init(void) 73 { 74 int i; 75 struct hlist_head *list = (struct hlist_head *) &security_hook_heads; 76 77 pr_info("Security Framework initializing\n"); 78 79 for (i = 0; i < sizeof(security_hook_heads) / sizeof(struct hlist_head); 80 i++) 81 INIT_HLIST_HEAD(&list[i]); 82 83 /* 84 * Load minor LSMs, with the capability module always first. 85 */ 86 capability_add_hooks(); 87 yama_add_hooks(); 88 loadpin_add_hooks(); 89 90 /* 91 * Load all the remaining security modules. 92 */ 93 major_lsm_init(); 94 95 return 0; 96 } 97 98 /* Save user chosen LSM */ 99 static int __init choose_lsm(char *str) 100 { 101 strncpy(chosen_lsm, str, SECURITY_NAME_MAX); 102 return 1; 103 } 104 __setup("security=", choose_lsm); 105 106 /* Enable LSM order debugging. */ 107 static int __init enable_debug(char *str) 108 { 109 debug = true; 110 return 1; 111 } 112 __setup("lsm.debug", enable_debug); 113 114 static bool match_last_lsm(const char *list, const char *lsm) 115 { 116 const char *last; 117 118 if (WARN_ON(!list || !lsm)) 119 return false; 120 last = strrchr(list, ','); 121 if (last) 122 /* Pass the comma, strcmp() will check for '\0' */ 123 last++; 124 else 125 last = list; 126 return !strcmp(last, lsm); 127 } 128 129 static int lsm_append(char *new, char **result) 130 { 131 char *cp; 132 133 if (*result == NULL) { 134 *result = kstrdup(new, GFP_KERNEL); 135 if (*result == NULL) 136 return -ENOMEM; 137 } else { 138 /* Check if it is the last registered name */ 139 if (match_last_lsm(*result, new)) 140 return 0; 141 cp = kasprintf(GFP_KERNEL, "%s,%s", *result, new); 142 if (cp == NULL) 143 return -ENOMEM; 144 kfree(*result); 145 *result = cp; 146 } 147 return 0; 148 } 149 150 /** 151 * security_module_enable - Load given security module on boot ? 152 * @module: the name of the module 153 * 154 * Each LSM must pass this method before registering its own operations 155 * to avoid security registration races. This method may also be used 156 * to check if your LSM is currently loaded during kernel initialization. 157 * 158 * Returns: 159 * 160 * true if: 161 * 162 * - The passed LSM is the one chosen by user at boot time, 163 * - or the passed LSM is configured as the default and the user did not 164 * choose an alternate LSM at boot time. 165 * 166 * Otherwise, return false. 167 */ 168 int __init security_module_enable(const char *module) 169 { 170 return !strcmp(module, chosen_lsm); 171 } 172 173 /** 174 * security_add_hooks - Add a modules hooks to the hook lists. 175 * @hooks: the hooks to add 176 * @count: the number of hooks to add 177 * @lsm: the name of the security module 178 * 179 * Each LSM has to register its hooks with the infrastructure. 180 */ 181 void __init security_add_hooks(struct security_hook_list *hooks, int count, 182 char *lsm) 183 { 184 int i; 185 186 for (i = 0; i < count; i++) { 187 hooks[i].lsm = lsm; 188 hlist_add_tail_rcu(&hooks[i].list, hooks[i].head); 189 } 190 if (lsm_append(lsm, &lsm_names) < 0) 191 panic("%s - Cannot get early memory.\n", __func__); 192 } 193 194 int call_lsm_notifier(enum lsm_event event, void *data) 195 { 196 return atomic_notifier_call_chain(&lsm_notifier_chain, event, data); 197 } 198 EXPORT_SYMBOL(call_lsm_notifier); 199 200 int register_lsm_notifier(struct notifier_block *nb) 201 { 202 return atomic_notifier_chain_register(&lsm_notifier_chain, nb); 203 } 204 EXPORT_SYMBOL(register_lsm_notifier); 205 206 int unregister_lsm_notifier(struct notifier_block *nb) 207 { 208 return atomic_notifier_chain_unregister(&lsm_notifier_chain, nb); 209 } 210 EXPORT_SYMBOL(unregister_lsm_notifier); 211 212 /* 213 * Hook list operation macros. 214 * 215 * call_void_hook: 216 * This is a hook that does not return a value. 217 * 218 * call_int_hook: 219 * This is a hook that returns a value. 220 */ 221 222 #define call_void_hook(FUNC, ...) \ 223 do { \ 224 struct security_hook_list *P; \ 225 \ 226 hlist_for_each_entry(P, &security_hook_heads.FUNC, list) \ 227 P->hook.FUNC(__VA_ARGS__); \ 228 } while (0) 229 230 #define call_int_hook(FUNC, IRC, ...) ({ \ 231 int RC = IRC; \ 232 do { \ 233 struct security_hook_list *P; \ 234 \ 235 hlist_for_each_entry(P, &security_hook_heads.FUNC, list) { \ 236 RC = P->hook.FUNC(__VA_ARGS__); \ 237 if (RC != 0) \ 238 break; \ 239 } \ 240 } while (0); \ 241 RC; \ 242 }) 243 244 /* Security operations */ 245 246 int security_binder_set_context_mgr(struct task_struct *mgr) 247 { 248 return call_int_hook(binder_set_context_mgr, 0, mgr); 249 } 250 251 int security_binder_transaction(struct task_struct *from, 252 struct task_struct *to) 253 { 254 return call_int_hook(binder_transaction, 0, from, to); 255 } 256 257 int security_binder_transfer_binder(struct task_struct *from, 258 struct task_struct *to) 259 { 260 return call_int_hook(binder_transfer_binder, 0, from, to); 261 } 262 263 int security_binder_transfer_file(struct task_struct *from, 264 struct task_struct *to, struct file *file) 265 { 266 return call_int_hook(binder_transfer_file, 0, from, to, file); 267 } 268 269 int security_ptrace_access_check(struct task_struct *child, unsigned int mode) 270 { 271 return call_int_hook(ptrace_access_check, 0, child, mode); 272 } 273 274 int security_ptrace_traceme(struct task_struct *parent) 275 { 276 return call_int_hook(ptrace_traceme, 0, parent); 277 } 278 279 int security_capget(struct task_struct *target, 280 kernel_cap_t *effective, 281 kernel_cap_t *inheritable, 282 kernel_cap_t *permitted) 283 { 284 return call_int_hook(capget, 0, target, 285 effective, inheritable, permitted); 286 } 287 288 int security_capset(struct cred *new, const struct cred *old, 289 const kernel_cap_t *effective, 290 const kernel_cap_t *inheritable, 291 const kernel_cap_t *permitted) 292 { 293 return call_int_hook(capset, 0, new, old, 294 effective, inheritable, permitted); 295 } 296 297 int security_capable(const struct cred *cred, struct user_namespace *ns, 298 int cap) 299 { 300 return call_int_hook(capable, 0, cred, ns, cap, SECURITY_CAP_AUDIT); 301 } 302 303 int security_capable_noaudit(const struct cred *cred, struct user_namespace *ns, 304 int cap) 305 { 306 return call_int_hook(capable, 0, cred, ns, cap, SECURITY_CAP_NOAUDIT); 307 } 308 309 int security_quotactl(int cmds, int type, int id, struct super_block *sb) 310 { 311 return call_int_hook(quotactl, 0, cmds, type, id, sb); 312 } 313 314 int security_quota_on(struct dentry *dentry) 315 { 316 return call_int_hook(quota_on, 0, dentry); 317 } 318 319 int security_syslog(int type) 320 { 321 return call_int_hook(syslog, 0, type); 322 } 323 324 int security_settime64(const struct timespec64 *ts, const struct timezone *tz) 325 { 326 return call_int_hook(settime, 0, ts, tz); 327 } 328 329 int security_vm_enough_memory_mm(struct mm_struct *mm, long pages) 330 { 331 struct security_hook_list *hp; 332 int cap_sys_admin = 1; 333 int rc; 334 335 /* 336 * The module will respond with a positive value if 337 * it thinks the __vm_enough_memory() call should be 338 * made with the cap_sys_admin set. If all of the modules 339 * agree that it should be set it will. If any module 340 * thinks it should not be set it won't. 341 */ 342 hlist_for_each_entry(hp, &security_hook_heads.vm_enough_memory, list) { 343 rc = hp->hook.vm_enough_memory(mm, pages); 344 if (rc <= 0) { 345 cap_sys_admin = 0; 346 break; 347 } 348 } 349 return __vm_enough_memory(mm, pages, cap_sys_admin); 350 } 351 352 int security_bprm_set_creds(struct linux_binprm *bprm) 353 { 354 return call_int_hook(bprm_set_creds, 0, bprm); 355 } 356 357 int security_bprm_check(struct linux_binprm *bprm) 358 { 359 int ret; 360 361 ret = call_int_hook(bprm_check_security, 0, bprm); 362 if (ret) 363 return ret; 364 return ima_bprm_check(bprm); 365 } 366 367 void security_bprm_committing_creds(struct linux_binprm *bprm) 368 { 369 call_void_hook(bprm_committing_creds, bprm); 370 } 371 372 void security_bprm_committed_creds(struct linux_binprm *bprm) 373 { 374 call_void_hook(bprm_committed_creds, bprm); 375 } 376 377 int security_sb_alloc(struct super_block *sb) 378 { 379 return call_int_hook(sb_alloc_security, 0, sb); 380 } 381 382 void security_sb_free(struct super_block *sb) 383 { 384 call_void_hook(sb_free_security, sb); 385 } 386 387 int security_sb_copy_data(char *orig, char *copy) 388 { 389 return call_int_hook(sb_copy_data, 0, orig, copy); 390 } 391 EXPORT_SYMBOL(security_sb_copy_data); 392 393 int security_sb_remount(struct super_block *sb, 394 struct security_mnt_opts *opts) 395 { 396 return call_int_hook(sb_remount, 0, sb, opts); 397 } 398 399 int security_sb_kern_mount(struct super_block *sb, int flags, 400 struct security_mnt_opts *opts) 401 { 402 return call_int_hook(sb_kern_mount, 0, sb, flags, opts); 403 } 404 405 int security_sb_show_options(struct seq_file *m, struct super_block *sb) 406 { 407 return call_int_hook(sb_show_options, 0, m, sb); 408 } 409 410 int security_sb_statfs(struct dentry *dentry) 411 { 412 return call_int_hook(sb_statfs, 0, dentry); 413 } 414 415 int security_sb_mount(const char *dev_name, const struct path *path, 416 const char *type, unsigned long flags, void *data) 417 { 418 return call_int_hook(sb_mount, 0, dev_name, path, type, flags, data); 419 } 420 421 int security_sb_umount(struct vfsmount *mnt, int flags) 422 { 423 return call_int_hook(sb_umount, 0, mnt, flags); 424 } 425 426 int security_sb_pivotroot(const struct path *old_path, const struct path *new_path) 427 { 428 return call_int_hook(sb_pivotroot, 0, old_path, new_path); 429 } 430 431 int security_sb_set_mnt_opts(struct super_block *sb, 432 struct security_mnt_opts *opts, 433 unsigned long kern_flags, 434 unsigned long *set_kern_flags) 435 { 436 return call_int_hook(sb_set_mnt_opts, 437 opts->num_mnt_opts ? -EOPNOTSUPP : 0, sb, 438 opts, kern_flags, set_kern_flags); 439 } 440 EXPORT_SYMBOL(security_sb_set_mnt_opts); 441 442 int security_sb_clone_mnt_opts(const struct super_block *oldsb, 443 struct super_block *newsb, 444 unsigned long kern_flags, 445 unsigned long *set_kern_flags) 446 { 447 return call_int_hook(sb_clone_mnt_opts, 0, oldsb, newsb, 448 kern_flags, set_kern_flags); 449 } 450 EXPORT_SYMBOL(security_sb_clone_mnt_opts); 451 452 int security_sb_parse_opts_str(char *options, struct security_mnt_opts *opts) 453 { 454 return call_int_hook(sb_parse_opts_str, 0, options, opts); 455 } 456 EXPORT_SYMBOL(security_sb_parse_opts_str); 457 458 int security_inode_alloc(struct inode *inode) 459 { 460 inode->i_security = NULL; 461 return call_int_hook(inode_alloc_security, 0, inode); 462 } 463 464 void security_inode_free(struct inode *inode) 465 { 466 integrity_inode_free(inode); 467 call_void_hook(inode_free_security, inode); 468 } 469 470 int security_dentry_init_security(struct dentry *dentry, int mode, 471 const struct qstr *name, void **ctx, 472 u32 *ctxlen) 473 { 474 return call_int_hook(dentry_init_security, -EOPNOTSUPP, dentry, mode, 475 name, ctx, ctxlen); 476 } 477 EXPORT_SYMBOL(security_dentry_init_security); 478 479 int security_dentry_create_files_as(struct dentry *dentry, int mode, 480 struct qstr *name, 481 const struct cred *old, struct cred *new) 482 { 483 return call_int_hook(dentry_create_files_as, 0, dentry, mode, 484 name, old, new); 485 } 486 EXPORT_SYMBOL(security_dentry_create_files_as); 487 488 int security_inode_init_security(struct inode *inode, struct inode *dir, 489 const struct qstr *qstr, 490 const initxattrs initxattrs, void *fs_data) 491 { 492 struct xattr new_xattrs[MAX_LSM_EVM_XATTR + 1]; 493 struct xattr *lsm_xattr, *evm_xattr, *xattr; 494 int ret; 495 496 if (unlikely(IS_PRIVATE(inode))) 497 return 0; 498 499 if (!initxattrs) 500 return call_int_hook(inode_init_security, -EOPNOTSUPP, inode, 501 dir, qstr, NULL, NULL, NULL); 502 memset(new_xattrs, 0, sizeof(new_xattrs)); 503 lsm_xattr = new_xattrs; 504 ret = call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir, qstr, 505 &lsm_xattr->name, 506 &lsm_xattr->value, 507 &lsm_xattr->value_len); 508 if (ret) 509 goto out; 510 511 evm_xattr = lsm_xattr + 1; 512 ret = evm_inode_init_security(inode, lsm_xattr, evm_xattr); 513 if (ret) 514 goto out; 515 ret = initxattrs(inode, new_xattrs, fs_data); 516 out: 517 for (xattr = new_xattrs; xattr->value != NULL; xattr++) 518 kfree(xattr->value); 519 return (ret == -EOPNOTSUPP) ? 0 : ret; 520 } 521 EXPORT_SYMBOL(security_inode_init_security); 522 523 int security_old_inode_init_security(struct inode *inode, struct inode *dir, 524 const struct qstr *qstr, const char **name, 525 void **value, size_t *len) 526 { 527 if (unlikely(IS_PRIVATE(inode))) 528 return -EOPNOTSUPP; 529 return call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir, 530 qstr, name, value, len); 531 } 532 EXPORT_SYMBOL(security_old_inode_init_security); 533 534 #ifdef CONFIG_SECURITY_PATH 535 int security_path_mknod(const struct path *dir, struct dentry *dentry, umode_t mode, 536 unsigned int dev) 537 { 538 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) 539 return 0; 540 return call_int_hook(path_mknod, 0, dir, dentry, mode, dev); 541 } 542 EXPORT_SYMBOL(security_path_mknod); 543 544 int security_path_mkdir(const struct path *dir, struct dentry *dentry, umode_t mode) 545 { 546 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) 547 return 0; 548 return call_int_hook(path_mkdir, 0, dir, dentry, mode); 549 } 550 EXPORT_SYMBOL(security_path_mkdir); 551 552 int security_path_rmdir(const struct path *dir, struct dentry *dentry) 553 { 554 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) 555 return 0; 556 return call_int_hook(path_rmdir, 0, dir, dentry); 557 } 558 559 int security_path_unlink(const struct path *dir, struct dentry *dentry) 560 { 561 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) 562 return 0; 563 return call_int_hook(path_unlink, 0, dir, dentry); 564 } 565 EXPORT_SYMBOL(security_path_unlink); 566 567 int security_path_symlink(const struct path *dir, struct dentry *dentry, 568 const char *old_name) 569 { 570 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) 571 return 0; 572 return call_int_hook(path_symlink, 0, dir, dentry, old_name); 573 } 574 575 int security_path_link(struct dentry *old_dentry, const struct path *new_dir, 576 struct dentry *new_dentry) 577 { 578 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)))) 579 return 0; 580 return call_int_hook(path_link, 0, old_dentry, new_dir, new_dentry); 581 } 582 583 int security_path_rename(const struct path *old_dir, struct dentry *old_dentry, 584 const struct path *new_dir, struct dentry *new_dentry, 585 unsigned int flags) 586 { 587 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) || 588 (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry))))) 589 return 0; 590 591 if (flags & RENAME_EXCHANGE) { 592 int err = call_int_hook(path_rename, 0, new_dir, new_dentry, 593 old_dir, old_dentry); 594 if (err) 595 return err; 596 } 597 598 return call_int_hook(path_rename, 0, old_dir, old_dentry, new_dir, 599 new_dentry); 600 } 601 EXPORT_SYMBOL(security_path_rename); 602 603 int security_path_truncate(const struct path *path) 604 { 605 if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry)))) 606 return 0; 607 return call_int_hook(path_truncate, 0, path); 608 } 609 610 int security_path_chmod(const struct path *path, umode_t mode) 611 { 612 if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry)))) 613 return 0; 614 return call_int_hook(path_chmod, 0, path, mode); 615 } 616 617 int security_path_chown(const struct path *path, kuid_t uid, kgid_t gid) 618 { 619 if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry)))) 620 return 0; 621 return call_int_hook(path_chown, 0, path, uid, gid); 622 } 623 624 int security_path_chroot(const struct path *path) 625 { 626 return call_int_hook(path_chroot, 0, path); 627 } 628 #endif 629 630 int security_inode_create(struct inode *dir, struct dentry *dentry, umode_t mode) 631 { 632 if (unlikely(IS_PRIVATE(dir))) 633 return 0; 634 return call_int_hook(inode_create, 0, dir, dentry, mode); 635 } 636 EXPORT_SYMBOL_GPL(security_inode_create); 637 638 int security_inode_link(struct dentry *old_dentry, struct inode *dir, 639 struct dentry *new_dentry) 640 { 641 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)))) 642 return 0; 643 return call_int_hook(inode_link, 0, old_dentry, dir, new_dentry); 644 } 645 646 int security_inode_unlink(struct inode *dir, struct dentry *dentry) 647 { 648 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 649 return 0; 650 return call_int_hook(inode_unlink, 0, dir, dentry); 651 } 652 653 int security_inode_symlink(struct inode *dir, struct dentry *dentry, 654 const char *old_name) 655 { 656 if (unlikely(IS_PRIVATE(dir))) 657 return 0; 658 return call_int_hook(inode_symlink, 0, dir, dentry, old_name); 659 } 660 661 int security_inode_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) 662 { 663 if (unlikely(IS_PRIVATE(dir))) 664 return 0; 665 return call_int_hook(inode_mkdir, 0, dir, dentry, mode); 666 } 667 EXPORT_SYMBOL_GPL(security_inode_mkdir); 668 669 int security_inode_rmdir(struct inode *dir, struct dentry *dentry) 670 { 671 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 672 return 0; 673 return call_int_hook(inode_rmdir, 0, dir, dentry); 674 } 675 676 int security_inode_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t dev) 677 { 678 if (unlikely(IS_PRIVATE(dir))) 679 return 0; 680 return call_int_hook(inode_mknod, 0, dir, dentry, mode, dev); 681 } 682 683 int security_inode_rename(struct inode *old_dir, struct dentry *old_dentry, 684 struct inode *new_dir, struct dentry *new_dentry, 685 unsigned int flags) 686 { 687 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) || 688 (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry))))) 689 return 0; 690 691 if (flags & RENAME_EXCHANGE) { 692 int err = call_int_hook(inode_rename, 0, new_dir, new_dentry, 693 old_dir, old_dentry); 694 if (err) 695 return err; 696 } 697 698 return call_int_hook(inode_rename, 0, old_dir, old_dentry, 699 new_dir, new_dentry); 700 } 701 702 int security_inode_readlink(struct dentry *dentry) 703 { 704 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 705 return 0; 706 return call_int_hook(inode_readlink, 0, dentry); 707 } 708 709 int security_inode_follow_link(struct dentry *dentry, struct inode *inode, 710 bool rcu) 711 { 712 if (unlikely(IS_PRIVATE(inode))) 713 return 0; 714 return call_int_hook(inode_follow_link, 0, dentry, inode, rcu); 715 } 716 717 int security_inode_permission(struct inode *inode, int mask) 718 { 719 if (unlikely(IS_PRIVATE(inode))) 720 return 0; 721 return call_int_hook(inode_permission, 0, inode, mask); 722 } 723 724 int security_inode_setattr(struct dentry *dentry, struct iattr *attr) 725 { 726 int ret; 727 728 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 729 return 0; 730 ret = call_int_hook(inode_setattr, 0, dentry, attr); 731 if (ret) 732 return ret; 733 return evm_inode_setattr(dentry, attr); 734 } 735 EXPORT_SYMBOL_GPL(security_inode_setattr); 736 737 int security_inode_getattr(const struct path *path) 738 { 739 if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry)))) 740 return 0; 741 return call_int_hook(inode_getattr, 0, path); 742 } 743 744 int security_inode_setxattr(struct dentry *dentry, const char *name, 745 const void *value, size_t size, int flags) 746 { 747 int ret; 748 749 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 750 return 0; 751 /* 752 * SELinux and Smack integrate the cap call, 753 * so assume that all LSMs supplying this call do so. 754 */ 755 ret = call_int_hook(inode_setxattr, 1, dentry, name, value, size, 756 flags); 757 758 if (ret == 1) 759 ret = cap_inode_setxattr(dentry, name, value, size, flags); 760 if (ret) 761 return ret; 762 ret = ima_inode_setxattr(dentry, name, value, size); 763 if (ret) 764 return ret; 765 return evm_inode_setxattr(dentry, name, value, size); 766 } 767 768 void security_inode_post_setxattr(struct dentry *dentry, const char *name, 769 const void *value, size_t size, int flags) 770 { 771 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 772 return; 773 call_void_hook(inode_post_setxattr, dentry, name, value, size, flags); 774 evm_inode_post_setxattr(dentry, name, value, size); 775 } 776 777 int security_inode_getxattr(struct dentry *dentry, const char *name) 778 { 779 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 780 return 0; 781 return call_int_hook(inode_getxattr, 0, dentry, name); 782 } 783 784 int security_inode_listxattr(struct dentry *dentry) 785 { 786 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 787 return 0; 788 return call_int_hook(inode_listxattr, 0, dentry); 789 } 790 791 int security_inode_removexattr(struct dentry *dentry, const char *name) 792 { 793 int ret; 794 795 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 796 return 0; 797 /* 798 * SELinux and Smack integrate the cap call, 799 * so assume that all LSMs supplying this call do so. 800 */ 801 ret = call_int_hook(inode_removexattr, 1, dentry, name); 802 if (ret == 1) 803 ret = cap_inode_removexattr(dentry, name); 804 if (ret) 805 return ret; 806 ret = ima_inode_removexattr(dentry, name); 807 if (ret) 808 return ret; 809 return evm_inode_removexattr(dentry, name); 810 } 811 812 int security_inode_need_killpriv(struct dentry *dentry) 813 { 814 return call_int_hook(inode_need_killpriv, 0, dentry); 815 } 816 817 int security_inode_killpriv(struct dentry *dentry) 818 { 819 return call_int_hook(inode_killpriv, 0, dentry); 820 } 821 822 int security_inode_getsecurity(struct inode *inode, const char *name, void **buffer, bool alloc) 823 { 824 struct security_hook_list *hp; 825 int rc; 826 827 if (unlikely(IS_PRIVATE(inode))) 828 return -EOPNOTSUPP; 829 /* 830 * Only one module will provide an attribute with a given name. 831 */ 832 hlist_for_each_entry(hp, &security_hook_heads.inode_getsecurity, list) { 833 rc = hp->hook.inode_getsecurity(inode, name, buffer, alloc); 834 if (rc != -EOPNOTSUPP) 835 return rc; 836 } 837 return -EOPNOTSUPP; 838 } 839 840 int security_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags) 841 { 842 struct security_hook_list *hp; 843 int rc; 844 845 if (unlikely(IS_PRIVATE(inode))) 846 return -EOPNOTSUPP; 847 /* 848 * Only one module will provide an attribute with a given name. 849 */ 850 hlist_for_each_entry(hp, &security_hook_heads.inode_setsecurity, list) { 851 rc = hp->hook.inode_setsecurity(inode, name, value, size, 852 flags); 853 if (rc != -EOPNOTSUPP) 854 return rc; 855 } 856 return -EOPNOTSUPP; 857 } 858 859 int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size) 860 { 861 if (unlikely(IS_PRIVATE(inode))) 862 return 0; 863 return call_int_hook(inode_listsecurity, 0, inode, buffer, buffer_size); 864 } 865 EXPORT_SYMBOL(security_inode_listsecurity); 866 867 void security_inode_getsecid(struct inode *inode, u32 *secid) 868 { 869 call_void_hook(inode_getsecid, inode, secid); 870 } 871 872 int security_inode_copy_up(struct dentry *src, struct cred **new) 873 { 874 return call_int_hook(inode_copy_up, 0, src, new); 875 } 876 EXPORT_SYMBOL(security_inode_copy_up); 877 878 int security_inode_copy_up_xattr(const char *name) 879 { 880 return call_int_hook(inode_copy_up_xattr, -EOPNOTSUPP, name); 881 } 882 EXPORT_SYMBOL(security_inode_copy_up_xattr); 883 884 int security_file_permission(struct file *file, int mask) 885 { 886 int ret; 887 888 ret = call_int_hook(file_permission, 0, file, mask); 889 if (ret) 890 return ret; 891 892 return fsnotify_perm(file, mask); 893 } 894 895 int security_file_alloc(struct file *file) 896 { 897 return call_int_hook(file_alloc_security, 0, file); 898 } 899 900 void security_file_free(struct file *file) 901 { 902 call_void_hook(file_free_security, file); 903 } 904 905 int security_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 906 { 907 return call_int_hook(file_ioctl, 0, file, cmd, arg); 908 } 909 910 static inline unsigned long mmap_prot(struct file *file, unsigned long prot) 911 { 912 /* 913 * Does we have PROT_READ and does the application expect 914 * it to imply PROT_EXEC? If not, nothing to talk about... 915 */ 916 if ((prot & (PROT_READ | PROT_EXEC)) != PROT_READ) 917 return prot; 918 if (!(current->personality & READ_IMPLIES_EXEC)) 919 return prot; 920 /* 921 * if that's an anonymous mapping, let it. 922 */ 923 if (!file) 924 return prot | PROT_EXEC; 925 /* 926 * ditto if it's not on noexec mount, except that on !MMU we need 927 * NOMMU_MAP_EXEC (== VM_MAYEXEC) in this case 928 */ 929 if (!path_noexec(&file->f_path)) { 930 #ifndef CONFIG_MMU 931 if (file->f_op->mmap_capabilities) { 932 unsigned caps = file->f_op->mmap_capabilities(file); 933 if (!(caps & NOMMU_MAP_EXEC)) 934 return prot; 935 } 936 #endif 937 return prot | PROT_EXEC; 938 } 939 /* anything on noexec mount won't get PROT_EXEC */ 940 return prot; 941 } 942 943 int security_mmap_file(struct file *file, unsigned long prot, 944 unsigned long flags) 945 { 946 int ret; 947 ret = call_int_hook(mmap_file, 0, file, prot, 948 mmap_prot(file, prot), flags); 949 if (ret) 950 return ret; 951 return ima_file_mmap(file, prot); 952 } 953 954 int security_mmap_addr(unsigned long addr) 955 { 956 return call_int_hook(mmap_addr, 0, addr); 957 } 958 959 int security_file_mprotect(struct vm_area_struct *vma, unsigned long reqprot, 960 unsigned long prot) 961 { 962 return call_int_hook(file_mprotect, 0, vma, reqprot, prot); 963 } 964 965 int security_file_lock(struct file *file, unsigned int cmd) 966 { 967 return call_int_hook(file_lock, 0, file, cmd); 968 } 969 970 int security_file_fcntl(struct file *file, unsigned int cmd, unsigned long arg) 971 { 972 return call_int_hook(file_fcntl, 0, file, cmd, arg); 973 } 974 975 void security_file_set_fowner(struct file *file) 976 { 977 call_void_hook(file_set_fowner, file); 978 } 979 980 int security_file_send_sigiotask(struct task_struct *tsk, 981 struct fown_struct *fown, int sig) 982 { 983 return call_int_hook(file_send_sigiotask, 0, tsk, fown, sig); 984 } 985 986 int security_file_receive(struct file *file) 987 { 988 return call_int_hook(file_receive, 0, file); 989 } 990 991 int security_file_open(struct file *file) 992 { 993 int ret; 994 995 ret = call_int_hook(file_open, 0, file); 996 if (ret) 997 return ret; 998 999 return fsnotify_perm(file, MAY_OPEN); 1000 } 1001 1002 int security_task_alloc(struct task_struct *task, unsigned long clone_flags) 1003 { 1004 return call_int_hook(task_alloc, 0, task, clone_flags); 1005 } 1006 1007 void security_task_free(struct task_struct *task) 1008 { 1009 call_void_hook(task_free, task); 1010 } 1011 1012 int security_cred_alloc_blank(struct cred *cred, gfp_t gfp) 1013 { 1014 return call_int_hook(cred_alloc_blank, 0, cred, gfp); 1015 } 1016 1017 void security_cred_free(struct cred *cred) 1018 { 1019 call_void_hook(cred_free, cred); 1020 } 1021 1022 int security_prepare_creds(struct cred *new, const struct cred *old, gfp_t gfp) 1023 { 1024 return call_int_hook(cred_prepare, 0, new, old, gfp); 1025 } 1026 1027 void security_transfer_creds(struct cred *new, const struct cred *old) 1028 { 1029 call_void_hook(cred_transfer, new, old); 1030 } 1031 1032 void security_cred_getsecid(const struct cred *c, u32 *secid) 1033 { 1034 *secid = 0; 1035 call_void_hook(cred_getsecid, c, secid); 1036 } 1037 EXPORT_SYMBOL(security_cred_getsecid); 1038 1039 int security_kernel_act_as(struct cred *new, u32 secid) 1040 { 1041 return call_int_hook(kernel_act_as, 0, new, secid); 1042 } 1043 1044 int security_kernel_create_files_as(struct cred *new, struct inode *inode) 1045 { 1046 return call_int_hook(kernel_create_files_as, 0, new, inode); 1047 } 1048 1049 int security_kernel_module_request(char *kmod_name) 1050 { 1051 int ret; 1052 1053 ret = call_int_hook(kernel_module_request, 0, kmod_name); 1054 if (ret) 1055 return ret; 1056 return integrity_kernel_module_request(kmod_name); 1057 } 1058 1059 int security_kernel_read_file(struct file *file, enum kernel_read_file_id id) 1060 { 1061 int ret; 1062 1063 ret = call_int_hook(kernel_read_file, 0, file, id); 1064 if (ret) 1065 return ret; 1066 return ima_read_file(file, id); 1067 } 1068 EXPORT_SYMBOL_GPL(security_kernel_read_file); 1069 1070 int security_kernel_post_read_file(struct file *file, char *buf, loff_t size, 1071 enum kernel_read_file_id id) 1072 { 1073 int ret; 1074 1075 ret = call_int_hook(kernel_post_read_file, 0, file, buf, size, id); 1076 if (ret) 1077 return ret; 1078 return ima_post_read_file(file, buf, size, id); 1079 } 1080 EXPORT_SYMBOL_GPL(security_kernel_post_read_file); 1081 1082 int security_kernel_load_data(enum kernel_load_data_id id) 1083 { 1084 int ret; 1085 1086 ret = call_int_hook(kernel_load_data, 0, id); 1087 if (ret) 1088 return ret; 1089 return ima_load_data(id); 1090 } 1091 EXPORT_SYMBOL_GPL(security_kernel_load_data); 1092 1093 int security_task_fix_setuid(struct cred *new, const struct cred *old, 1094 int flags) 1095 { 1096 return call_int_hook(task_fix_setuid, 0, new, old, flags); 1097 } 1098 1099 int security_task_setpgid(struct task_struct *p, pid_t pgid) 1100 { 1101 return call_int_hook(task_setpgid, 0, p, pgid); 1102 } 1103 1104 int security_task_getpgid(struct task_struct *p) 1105 { 1106 return call_int_hook(task_getpgid, 0, p); 1107 } 1108 1109 int security_task_getsid(struct task_struct *p) 1110 { 1111 return call_int_hook(task_getsid, 0, p); 1112 } 1113 1114 void security_task_getsecid(struct task_struct *p, u32 *secid) 1115 { 1116 *secid = 0; 1117 call_void_hook(task_getsecid, p, secid); 1118 } 1119 EXPORT_SYMBOL(security_task_getsecid); 1120 1121 int security_task_setnice(struct task_struct *p, int nice) 1122 { 1123 return call_int_hook(task_setnice, 0, p, nice); 1124 } 1125 1126 int security_task_setioprio(struct task_struct *p, int ioprio) 1127 { 1128 return call_int_hook(task_setioprio, 0, p, ioprio); 1129 } 1130 1131 int security_task_getioprio(struct task_struct *p) 1132 { 1133 return call_int_hook(task_getioprio, 0, p); 1134 } 1135 1136 int security_task_prlimit(const struct cred *cred, const struct cred *tcred, 1137 unsigned int flags) 1138 { 1139 return call_int_hook(task_prlimit, 0, cred, tcred, flags); 1140 } 1141 1142 int security_task_setrlimit(struct task_struct *p, unsigned int resource, 1143 struct rlimit *new_rlim) 1144 { 1145 return call_int_hook(task_setrlimit, 0, p, resource, new_rlim); 1146 } 1147 1148 int security_task_setscheduler(struct task_struct *p) 1149 { 1150 return call_int_hook(task_setscheduler, 0, p); 1151 } 1152 1153 int security_task_getscheduler(struct task_struct *p) 1154 { 1155 return call_int_hook(task_getscheduler, 0, p); 1156 } 1157 1158 int security_task_movememory(struct task_struct *p) 1159 { 1160 return call_int_hook(task_movememory, 0, p); 1161 } 1162 1163 int security_task_kill(struct task_struct *p, struct kernel_siginfo *info, 1164 int sig, const struct cred *cred) 1165 { 1166 return call_int_hook(task_kill, 0, p, info, sig, cred); 1167 } 1168 1169 int security_task_prctl(int option, unsigned long arg2, unsigned long arg3, 1170 unsigned long arg4, unsigned long arg5) 1171 { 1172 int thisrc; 1173 int rc = -ENOSYS; 1174 struct security_hook_list *hp; 1175 1176 hlist_for_each_entry(hp, &security_hook_heads.task_prctl, list) { 1177 thisrc = hp->hook.task_prctl(option, arg2, arg3, arg4, arg5); 1178 if (thisrc != -ENOSYS) { 1179 rc = thisrc; 1180 if (thisrc != 0) 1181 break; 1182 } 1183 } 1184 return rc; 1185 } 1186 1187 void security_task_to_inode(struct task_struct *p, struct inode *inode) 1188 { 1189 call_void_hook(task_to_inode, p, inode); 1190 } 1191 1192 int security_ipc_permission(struct kern_ipc_perm *ipcp, short flag) 1193 { 1194 return call_int_hook(ipc_permission, 0, ipcp, flag); 1195 } 1196 1197 void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid) 1198 { 1199 *secid = 0; 1200 call_void_hook(ipc_getsecid, ipcp, secid); 1201 } 1202 1203 int security_msg_msg_alloc(struct msg_msg *msg) 1204 { 1205 return call_int_hook(msg_msg_alloc_security, 0, msg); 1206 } 1207 1208 void security_msg_msg_free(struct msg_msg *msg) 1209 { 1210 call_void_hook(msg_msg_free_security, msg); 1211 } 1212 1213 int security_msg_queue_alloc(struct kern_ipc_perm *msq) 1214 { 1215 return call_int_hook(msg_queue_alloc_security, 0, msq); 1216 } 1217 1218 void security_msg_queue_free(struct kern_ipc_perm *msq) 1219 { 1220 call_void_hook(msg_queue_free_security, msq); 1221 } 1222 1223 int security_msg_queue_associate(struct kern_ipc_perm *msq, int msqflg) 1224 { 1225 return call_int_hook(msg_queue_associate, 0, msq, msqflg); 1226 } 1227 1228 int security_msg_queue_msgctl(struct kern_ipc_perm *msq, int cmd) 1229 { 1230 return call_int_hook(msg_queue_msgctl, 0, msq, cmd); 1231 } 1232 1233 int security_msg_queue_msgsnd(struct kern_ipc_perm *msq, 1234 struct msg_msg *msg, int msqflg) 1235 { 1236 return call_int_hook(msg_queue_msgsnd, 0, msq, msg, msqflg); 1237 } 1238 1239 int security_msg_queue_msgrcv(struct kern_ipc_perm *msq, struct msg_msg *msg, 1240 struct task_struct *target, long type, int mode) 1241 { 1242 return call_int_hook(msg_queue_msgrcv, 0, msq, msg, target, type, mode); 1243 } 1244 1245 int security_shm_alloc(struct kern_ipc_perm *shp) 1246 { 1247 return call_int_hook(shm_alloc_security, 0, shp); 1248 } 1249 1250 void security_shm_free(struct kern_ipc_perm *shp) 1251 { 1252 call_void_hook(shm_free_security, shp); 1253 } 1254 1255 int security_shm_associate(struct kern_ipc_perm *shp, int shmflg) 1256 { 1257 return call_int_hook(shm_associate, 0, shp, shmflg); 1258 } 1259 1260 int security_shm_shmctl(struct kern_ipc_perm *shp, int cmd) 1261 { 1262 return call_int_hook(shm_shmctl, 0, shp, cmd); 1263 } 1264 1265 int security_shm_shmat(struct kern_ipc_perm *shp, char __user *shmaddr, int shmflg) 1266 { 1267 return call_int_hook(shm_shmat, 0, shp, shmaddr, shmflg); 1268 } 1269 1270 int security_sem_alloc(struct kern_ipc_perm *sma) 1271 { 1272 return call_int_hook(sem_alloc_security, 0, sma); 1273 } 1274 1275 void security_sem_free(struct kern_ipc_perm *sma) 1276 { 1277 call_void_hook(sem_free_security, sma); 1278 } 1279 1280 int security_sem_associate(struct kern_ipc_perm *sma, int semflg) 1281 { 1282 return call_int_hook(sem_associate, 0, sma, semflg); 1283 } 1284 1285 int security_sem_semctl(struct kern_ipc_perm *sma, int cmd) 1286 { 1287 return call_int_hook(sem_semctl, 0, sma, cmd); 1288 } 1289 1290 int security_sem_semop(struct kern_ipc_perm *sma, struct sembuf *sops, 1291 unsigned nsops, int alter) 1292 { 1293 return call_int_hook(sem_semop, 0, sma, sops, nsops, alter); 1294 } 1295 1296 void security_d_instantiate(struct dentry *dentry, struct inode *inode) 1297 { 1298 if (unlikely(inode && IS_PRIVATE(inode))) 1299 return; 1300 call_void_hook(d_instantiate, dentry, inode); 1301 } 1302 EXPORT_SYMBOL(security_d_instantiate); 1303 1304 int security_getprocattr(struct task_struct *p, char *name, char **value) 1305 { 1306 return call_int_hook(getprocattr, -EINVAL, p, name, value); 1307 } 1308 1309 int security_setprocattr(const char *name, void *value, size_t size) 1310 { 1311 return call_int_hook(setprocattr, -EINVAL, name, value, size); 1312 } 1313 1314 int security_netlink_send(struct sock *sk, struct sk_buff *skb) 1315 { 1316 return call_int_hook(netlink_send, 0, sk, skb); 1317 } 1318 1319 int security_ismaclabel(const char *name) 1320 { 1321 return call_int_hook(ismaclabel, 0, name); 1322 } 1323 EXPORT_SYMBOL(security_ismaclabel); 1324 1325 int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen) 1326 { 1327 return call_int_hook(secid_to_secctx, -EOPNOTSUPP, secid, secdata, 1328 seclen); 1329 } 1330 EXPORT_SYMBOL(security_secid_to_secctx); 1331 1332 int security_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid) 1333 { 1334 *secid = 0; 1335 return call_int_hook(secctx_to_secid, 0, secdata, seclen, secid); 1336 } 1337 EXPORT_SYMBOL(security_secctx_to_secid); 1338 1339 void security_release_secctx(char *secdata, u32 seclen) 1340 { 1341 call_void_hook(release_secctx, secdata, seclen); 1342 } 1343 EXPORT_SYMBOL(security_release_secctx); 1344 1345 void security_inode_invalidate_secctx(struct inode *inode) 1346 { 1347 call_void_hook(inode_invalidate_secctx, inode); 1348 } 1349 EXPORT_SYMBOL(security_inode_invalidate_secctx); 1350 1351 int security_inode_notifysecctx(struct inode *inode, void *ctx, u32 ctxlen) 1352 { 1353 return call_int_hook(inode_notifysecctx, 0, inode, ctx, ctxlen); 1354 } 1355 EXPORT_SYMBOL(security_inode_notifysecctx); 1356 1357 int security_inode_setsecctx(struct dentry *dentry, void *ctx, u32 ctxlen) 1358 { 1359 return call_int_hook(inode_setsecctx, 0, dentry, ctx, ctxlen); 1360 } 1361 EXPORT_SYMBOL(security_inode_setsecctx); 1362 1363 int security_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen) 1364 { 1365 return call_int_hook(inode_getsecctx, -EOPNOTSUPP, inode, ctx, ctxlen); 1366 } 1367 EXPORT_SYMBOL(security_inode_getsecctx); 1368 1369 #ifdef CONFIG_SECURITY_NETWORK 1370 1371 int security_unix_stream_connect(struct sock *sock, struct sock *other, struct sock *newsk) 1372 { 1373 return call_int_hook(unix_stream_connect, 0, sock, other, newsk); 1374 } 1375 EXPORT_SYMBOL(security_unix_stream_connect); 1376 1377 int security_unix_may_send(struct socket *sock, struct socket *other) 1378 { 1379 return call_int_hook(unix_may_send, 0, sock, other); 1380 } 1381 EXPORT_SYMBOL(security_unix_may_send); 1382 1383 int security_socket_create(int family, int type, int protocol, int kern) 1384 { 1385 return call_int_hook(socket_create, 0, family, type, protocol, kern); 1386 } 1387 1388 int security_socket_post_create(struct socket *sock, int family, 1389 int type, int protocol, int kern) 1390 { 1391 return call_int_hook(socket_post_create, 0, sock, family, type, 1392 protocol, kern); 1393 } 1394 1395 int security_socket_socketpair(struct socket *socka, struct socket *sockb) 1396 { 1397 return call_int_hook(socket_socketpair, 0, socka, sockb); 1398 } 1399 EXPORT_SYMBOL(security_socket_socketpair); 1400 1401 int security_socket_bind(struct socket *sock, struct sockaddr *address, int addrlen) 1402 { 1403 return call_int_hook(socket_bind, 0, sock, address, addrlen); 1404 } 1405 1406 int security_socket_connect(struct socket *sock, struct sockaddr *address, int addrlen) 1407 { 1408 return call_int_hook(socket_connect, 0, sock, address, addrlen); 1409 } 1410 1411 int security_socket_listen(struct socket *sock, int backlog) 1412 { 1413 return call_int_hook(socket_listen, 0, sock, backlog); 1414 } 1415 1416 int security_socket_accept(struct socket *sock, struct socket *newsock) 1417 { 1418 return call_int_hook(socket_accept, 0, sock, newsock); 1419 } 1420 1421 int security_socket_sendmsg(struct socket *sock, struct msghdr *msg, int size) 1422 { 1423 return call_int_hook(socket_sendmsg, 0, sock, msg, size); 1424 } 1425 1426 int security_socket_recvmsg(struct socket *sock, struct msghdr *msg, 1427 int size, int flags) 1428 { 1429 return call_int_hook(socket_recvmsg, 0, sock, msg, size, flags); 1430 } 1431 1432 int security_socket_getsockname(struct socket *sock) 1433 { 1434 return call_int_hook(socket_getsockname, 0, sock); 1435 } 1436 1437 int security_socket_getpeername(struct socket *sock) 1438 { 1439 return call_int_hook(socket_getpeername, 0, sock); 1440 } 1441 1442 int security_socket_getsockopt(struct socket *sock, int level, int optname) 1443 { 1444 return call_int_hook(socket_getsockopt, 0, sock, level, optname); 1445 } 1446 1447 int security_socket_setsockopt(struct socket *sock, int level, int optname) 1448 { 1449 return call_int_hook(socket_setsockopt, 0, sock, level, optname); 1450 } 1451 1452 int security_socket_shutdown(struct socket *sock, int how) 1453 { 1454 return call_int_hook(socket_shutdown, 0, sock, how); 1455 } 1456 1457 int security_sock_rcv_skb(struct sock *sk, struct sk_buff *skb) 1458 { 1459 return call_int_hook(socket_sock_rcv_skb, 0, sk, skb); 1460 } 1461 EXPORT_SYMBOL(security_sock_rcv_skb); 1462 1463 int security_socket_getpeersec_stream(struct socket *sock, char __user *optval, 1464 int __user *optlen, unsigned len) 1465 { 1466 return call_int_hook(socket_getpeersec_stream, -ENOPROTOOPT, sock, 1467 optval, optlen, len); 1468 } 1469 1470 int security_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb, u32 *secid) 1471 { 1472 return call_int_hook(socket_getpeersec_dgram, -ENOPROTOOPT, sock, 1473 skb, secid); 1474 } 1475 EXPORT_SYMBOL(security_socket_getpeersec_dgram); 1476 1477 int security_sk_alloc(struct sock *sk, int family, gfp_t priority) 1478 { 1479 return call_int_hook(sk_alloc_security, 0, sk, family, priority); 1480 } 1481 1482 void security_sk_free(struct sock *sk) 1483 { 1484 call_void_hook(sk_free_security, sk); 1485 } 1486 1487 void security_sk_clone(const struct sock *sk, struct sock *newsk) 1488 { 1489 call_void_hook(sk_clone_security, sk, newsk); 1490 } 1491 EXPORT_SYMBOL(security_sk_clone); 1492 1493 void security_sk_classify_flow(struct sock *sk, struct flowi *fl) 1494 { 1495 call_void_hook(sk_getsecid, sk, &fl->flowi_secid); 1496 } 1497 EXPORT_SYMBOL(security_sk_classify_flow); 1498 1499 void security_req_classify_flow(const struct request_sock *req, struct flowi *fl) 1500 { 1501 call_void_hook(req_classify_flow, req, fl); 1502 } 1503 EXPORT_SYMBOL(security_req_classify_flow); 1504 1505 void security_sock_graft(struct sock *sk, struct socket *parent) 1506 { 1507 call_void_hook(sock_graft, sk, parent); 1508 } 1509 EXPORT_SYMBOL(security_sock_graft); 1510 1511 int security_inet_conn_request(struct sock *sk, 1512 struct sk_buff *skb, struct request_sock *req) 1513 { 1514 return call_int_hook(inet_conn_request, 0, sk, skb, req); 1515 } 1516 EXPORT_SYMBOL(security_inet_conn_request); 1517 1518 void security_inet_csk_clone(struct sock *newsk, 1519 const struct request_sock *req) 1520 { 1521 call_void_hook(inet_csk_clone, newsk, req); 1522 } 1523 1524 void security_inet_conn_established(struct sock *sk, 1525 struct sk_buff *skb) 1526 { 1527 call_void_hook(inet_conn_established, sk, skb); 1528 } 1529 EXPORT_SYMBOL(security_inet_conn_established); 1530 1531 int security_secmark_relabel_packet(u32 secid) 1532 { 1533 return call_int_hook(secmark_relabel_packet, 0, secid); 1534 } 1535 EXPORT_SYMBOL(security_secmark_relabel_packet); 1536 1537 void security_secmark_refcount_inc(void) 1538 { 1539 call_void_hook(secmark_refcount_inc); 1540 } 1541 EXPORT_SYMBOL(security_secmark_refcount_inc); 1542 1543 void security_secmark_refcount_dec(void) 1544 { 1545 call_void_hook(secmark_refcount_dec); 1546 } 1547 EXPORT_SYMBOL(security_secmark_refcount_dec); 1548 1549 int security_tun_dev_alloc_security(void **security) 1550 { 1551 return call_int_hook(tun_dev_alloc_security, 0, security); 1552 } 1553 EXPORT_SYMBOL(security_tun_dev_alloc_security); 1554 1555 void security_tun_dev_free_security(void *security) 1556 { 1557 call_void_hook(tun_dev_free_security, security); 1558 } 1559 EXPORT_SYMBOL(security_tun_dev_free_security); 1560 1561 int security_tun_dev_create(void) 1562 { 1563 return call_int_hook(tun_dev_create, 0); 1564 } 1565 EXPORT_SYMBOL(security_tun_dev_create); 1566 1567 int security_tun_dev_attach_queue(void *security) 1568 { 1569 return call_int_hook(tun_dev_attach_queue, 0, security); 1570 } 1571 EXPORT_SYMBOL(security_tun_dev_attach_queue); 1572 1573 int security_tun_dev_attach(struct sock *sk, void *security) 1574 { 1575 return call_int_hook(tun_dev_attach, 0, sk, security); 1576 } 1577 EXPORT_SYMBOL(security_tun_dev_attach); 1578 1579 int security_tun_dev_open(void *security) 1580 { 1581 return call_int_hook(tun_dev_open, 0, security); 1582 } 1583 EXPORT_SYMBOL(security_tun_dev_open); 1584 1585 int security_sctp_assoc_request(struct sctp_endpoint *ep, struct sk_buff *skb) 1586 { 1587 return call_int_hook(sctp_assoc_request, 0, ep, skb); 1588 } 1589 EXPORT_SYMBOL(security_sctp_assoc_request); 1590 1591 int security_sctp_bind_connect(struct sock *sk, int optname, 1592 struct sockaddr *address, int addrlen) 1593 { 1594 return call_int_hook(sctp_bind_connect, 0, sk, optname, 1595 address, addrlen); 1596 } 1597 EXPORT_SYMBOL(security_sctp_bind_connect); 1598 1599 void security_sctp_sk_clone(struct sctp_endpoint *ep, struct sock *sk, 1600 struct sock *newsk) 1601 { 1602 call_void_hook(sctp_sk_clone, ep, sk, newsk); 1603 } 1604 EXPORT_SYMBOL(security_sctp_sk_clone); 1605 1606 #endif /* CONFIG_SECURITY_NETWORK */ 1607 1608 #ifdef CONFIG_SECURITY_INFINIBAND 1609 1610 int security_ib_pkey_access(void *sec, u64 subnet_prefix, u16 pkey) 1611 { 1612 return call_int_hook(ib_pkey_access, 0, sec, subnet_prefix, pkey); 1613 } 1614 EXPORT_SYMBOL(security_ib_pkey_access); 1615 1616 int security_ib_endport_manage_subnet(void *sec, const char *dev_name, u8 port_num) 1617 { 1618 return call_int_hook(ib_endport_manage_subnet, 0, sec, dev_name, port_num); 1619 } 1620 EXPORT_SYMBOL(security_ib_endport_manage_subnet); 1621 1622 int security_ib_alloc_security(void **sec) 1623 { 1624 return call_int_hook(ib_alloc_security, 0, sec); 1625 } 1626 EXPORT_SYMBOL(security_ib_alloc_security); 1627 1628 void security_ib_free_security(void *sec) 1629 { 1630 call_void_hook(ib_free_security, sec); 1631 } 1632 EXPORT_SYMBOL(security_ib_free_security); 1633 #endif /* CONFIG_SECURITY_INFINIBAND */ 1634 1635 #ifdef CONFIG_SECURITY_NETWORK_XFRM 1636 1637 int security_xfrm_policy_alloc(struct xfrm_sec_ctx **ctxp, 1638 struct xfrm_user_sec_ctx *sec_ctx, 1639 gfp_t gfp) 1640 { 1641 return call_int_hook(xfrm_policy_alloc_security, 0, ctxp, sec_ctx, gfp); 1642 } 1643 EXPORT_SYMBOL(security_xfrm_policy_alloc); 1644 1645 int security_xfrm_policy_clone(struct xfrm_sec_ctx *old_ctx, 1646 struct xfrm_sec_ctx **new_ctxp) 1647 { 1648 return call_int_hook(xfrm_policy_clone_security, 0, old_ctx, new_ctxp); 1649 } 1650 1651 void security_xfrm_policy_free(struct xfrm_sec_ctx *ctx) 1652 { 1653 call_void_hook(xfrm_policy_free_security, ctx); 1654 } 1655 EXPORT_SYMBOL(security_xfrm_policy_free); 1656 1657 int security_xfrm_policy_delete(struct xfrm_sec_ctx *ctx) 1658 { 1659 return call_int_hook(xfrm_policy_delete_security, 0, ctx); 1660 } 1661 1662 int security_xfrm_state_alloc(struct xfrm_state *x, 1663 struct xfrm_user_sec_ctx *sec_ctx) 1664 { 1665 return call_int_hook(xfrm_state_alloc, 0, x, sec_ctx); 1666 } 1667 EXPORT_SYMBOL(security_xfrm_state_alloc); 1668 1669 int security_xfrm_state_alloc_acquire(struct xfrm_state *x, 1670 struct xfrm_sec_ctx *polsec, u32 secid) 1671 { 1672 return call_int_hook(xfrm_state_alloc_acquire, 0, x, polsec, secid); 1673 } 1674 1675 int security_xfrm_state_delete(struct xfrm_state *x) 1676 { 1677 return call_int_hook(xfrm_state_delete_security, 0, x); 1678 } 1679 EXPORT_SYMBOL(security_xfrm_state_delete); 1680 1681 void security_xfrm_state_free(struct xfrm_state *x) 1682 { 1683 call_void_hook(xfrm_state_free_security, x); 1684 } 1685 1686 int security_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir) 1687 { 1688 return call_int_hook(xfrm_policy_lookup, 0, ctx, fl_secid, dir); 1689 } 1690 1691 int security_xfrm_state_pol_flow_match(struct xfrm_state *x, 1692 struct xfrm_policy *xp, 1693 const struct flowi *fl) 1694 { 1695 struct security_hook_list *hp; 1696 int rc = 1; 1697 1698 /* 1699 * Since this function is expected to return 0 or 1, the judgment 1700 * becomes difficult if multiple LSMs supply this call. Fortunately, 1701 * we can use the first LSM's judgment because currently only SELinux 1702 * supplies this call. 1703 * 1704 * For speed optimization, we explicitly break the loop rather than 1705 * using the macro 1706 */ 1707 hlist_for_each_entry(hp, &security_hook_heads.xfrm_state_pol_flow_match, 1708 list) { 1709 rc = hp->hook.xfrm_state_pol_flow_match(x, xp, fl); 1710 break; 1711 } 1712 return rc; 1713 } 1714 1715 int security_xfrm_decode_session(struct sk_buff *skb, u32 *secid) 1716 { 1717 return call_int_hook(xfrm_decode_session, 0, skb, secid, 1); 1718 } 1719 1720 void security_skb_classify_flow(struct sk_buff *skb, struct flowi *fl) 1721 { 1722 int rc = call_int_hook(xfrm_decode_session, 0, skb, &fl->flowi_secid, 1723 0); 1724 1725 BUG_ON(rc); 1726 } 1727 EXPORT_SYMBOL(security_skb_classify_flow); 1728 1729 #endif /* CONFIG_SECURITY_NETWORK_XFRM */ 1730 1731 #ifdef CONFIG_KEYS 1732 1733 int security_key_alloc(struct key *key, const struct cred *cred, 1734 unsigned long flags) 1735 { 1736 return call_int_hook(key_alloc, 0, key, cred, flags); 1737 } 1738 1739 void security_key_free(struct key *key) 1740 { 1741 call_void_hook(key_free, key); 1742 } 1743 1744 int security_key_permission(key_ref_t key_ref, 1745 const struct cred *cred, unsigned perm) 1746 { 1747 return call_int_hook(key_permission, 0, key_ref, cred, perm); 1748 } 1749 1750 int security_key_getsecurity(struct key *key, char **_buffer) 1751 { 1752 *_buffer = NULL; 1753 return call_int_hook(key_getsecurity, 0, key, _buffer); 1754 } 1755 1756 #endif /* CONFIG_KEYS */ 1757 1758 #ifdef CONFIG_AUDIT 1759 1760 int security_audit_rule_init(u32 field, u32 op, char *rulestr, void **lsmrule) 1761 { 1762 return call_int_hook(audit_rule_init, 0, field, op, rulestr, lsmrule); 1763 } 1764 1765 int security_audit_rule_known(struct audit_krule *krule) 1766 { 1767 return call_int_hook(audit_rule_known, 0, krule); 1768 } 1769 1770 void security_audit_rule_free(void *lsmrule) 1771 { 1772 call_void_hook(audit_rule_free, lsmrule); 1773 } 1774 1775 int security_audit_rule_match(u32 secid, u32 field, u32 op, void *lsmrule, 1776 struct audit_context *actx) 1777 { 1778 return call_int_hook(audit_rule_match, 0, secid, field, op, lsmrule, 1779 actx); 1780 } 1781 #endif /* CONFIG_AUDIT */ 1782 1783 #ifdef CONFIG_BPF_SYSCALL 1784 int security_bpf(int cmd, union bpf_attr *attr, unsigned int size) 1785 { 1786 return call_int_hook(bpf, 0, cmd, attr, size); 1787 } 1788 int security_bpf_map(struct bpf_map *map, fmode_t fmode) 1789 { 1790 return call_int_hook(bpf_map, 0, map, fmode); 1791 } 1792 int security_bpf_prog(struct bpf_prog *prog) 1793 { 1794 return call_int_hook(bpf_prog, 0, prog); 1795 } 1796 int security_bpf_map_alloc(struct bpf_map *map) 1797 { 1798 return call_int_hook(bpf_map_alloc_security, 0, map); 1799 } 1800 int security_bpf_prog_alloc(struct bpf_prog_aux *aux) 1801 { 1802 return call_int_hook(bpf_prog_alloc_security, 0, aux); 1803 } 1804 void security_bpf_map_free(struct bpf_map *map) 1805 { 1806 call_void_hook(bpf_map_free_security, map); 1807 } 1808 void security_bpf_prog_free(struct bpf_prog_aux *aux) 1809 { 1810 call_void_hook(bpf_prog_free_security, aux); 1811 } 1812 #endif /* CONFIG_BPF_SYSCALL */ 1813