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_eat_lsm_opts(char *options, struct security_mnt_opts *opts) 388 { 389 char *s = (char *)get_zeroed_page(GFP_KERNEL); 390 int err; 391 392 if (!s) 393 return -ENOMEM; 394 err = call_int_hook(sb_copy_data, 0, options, s); 395 if (!err) 396 err = call_int_hook(sb_parse_opts_str, 0, s, opts); 397 free_page((unsigned long)s); 398 return err; 399 } 400 EXPORT_SYMBOL(security_sb_eat_lsm_opts); 401 402 int security_sb_remount(struct super_block *sb, 403 struct security_mnt_opts *opts) 404 { 405 return call_int_hook(sb_remount, 0, sb, opts); 406 } 407 EXPORT_SYMBOL(security_sb_remount); 408 409 int security_sb_kern_mount(struct super_block *sb) 410 { 411 return call_int_hook(sb_kern_mount, 0, sb); 412 } 413 414 int security_sb_show_options(struct seq_file *m, struct super_block *sb) 415 { 416 return call_int_hook(sb_show_options, 0, m, sb); 417 } 418 419 int security_sb_statfs(struct dentry *dentry) 420 { 421 return call_int_hook(sb_statfs, 0, dentry); 422 } 423 424 int security_sb_mount(const char *dev_name, const struct path *path, 425 const char *type, unsigned long flags, void *data) 426 { 427 return call_int_hook(sb_mount, 0, dev_name, path, type, flags, data); 428 } 429 430 int security_sb_umount(struct vfsmount *mnt, int flags) 431 { 432 return call_int_hook(sb_umount, 0, mnt, flags); 433 } 434 435 int security_sb_pivotroot(const struct path *old_path, const struct path *new_path) 436 { 437 return call_int_hook(sb_pivotroot, 0, old_path, new_path); 438 } 439 440 int security_sb_set_mnt_opts(struct super_block *sb, 441 struct security_mnt_opts *opts, 442 unsigned long kern_flags, 443 unsigned long *set_kern_flags) 444 { 445 return call_int_hook(sb_set_mnt_opts, 446 opts->num_mnt_opts ? -EOPNOTSUPP : 0, sb, 447 opts, kern_flags, set_kern_flags); 448 } 449 EXPORT_SYMBOL(security_sb_set_mnt_opts); 450 451 int security_sb_clone_mnt_opts(const struct super_block *oldsb, 452 struct super_block *newsb, 453 unsigned long kern_flags, 454 unsigned long *set_kern_flags) 455 { 456 return call_int_hook(sb_clone_mnt_opts, 0, oldsb, newsb, 457 kern_flags, set_kern_flags); 458 } 459 EXPORT_SYMBOL(security_sb_clone_mnt_opts); 460 461 int security_sb_parse_opts_str(char *options, struct security_mnt_opts *opts) 462 { 463 return call_int_hook(sb_parse_opts_str, 0, options, opts); 464 } 465 EXPORT_SYMBOL(security_sb_parse_opts_str); 466 467 int security_inode_alloc(struct inode *inode) 468 { 469 inode->i_security = NULL; 470 return call_int_hook(inode_alloc_security, 0, inode); 471 } 472 473 void security_inode_free(struct inode *inode) 474 { 475 integrity_inode_free(inode); 476 call_void_hook(inode_free_security, inode); 477 } 478 479 int security_dentry_init_security(struct dentry *dentry, int mode, 480 const struct qstr *name, void **ctx, 481 u32 *ctxlen) 482 { 483 return call_int_hook(dentry_init_security, -EOPNOTSUPP, dentry, mode, 484 name, ctx, ctxlen); 485 } 486 EXPORT_SYMBOL(security_dentry_init_security); 487 488 int security_dentry_create_files_as(struct dentry *dentry, int mode, 489 struct qstr *name, 490 const struct cred *old, struct cred *new) 491 { 492 return call_int_hook(dentry_create_files_as, 0, dentry, mode, 493 name, old, new); 494 } 495 EXPORT_SYMBOL(security_dentry_create_files_as); 496 497 int security_inode_init_security(struct inode *inode, struct inode *dir, 498 const struct qstr *qstr, 499 const initxattrs initxattrs, void *fs_data) 500 { 501 struct xattr new_xattrs[MAX_LSM_EVM_XATTR + 1]; 502 struct xattr *lsm_xattr, *evm_xattr, *xattr; 503 int ret; 504 505 if (unlikely(IS_PRIVATE(inode))) 506 return 0; 507 508 if (!initxattrs) 509 return call_int_hook(inode_init_security, -EOPNOTSUPP, inode, 510 dir, qstr, NULL, NULL, NULL); 511 memset(new_xattrs, 0, sizeof(new_xattrs)); 512 lsm_xattr = new_xattrs; 513 ret = call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir, qstr, 514 &lsm_xattr->name, 515 &lsm_xattr->value, 516 &lsm_xattr->value_len); 517 if (ret) 518 goto out; 519 520 evm_xattr = lsm_xattr + 1; 521 ret = evm_inode_init_security(inode, lsm_xattr, evm_xattr); 522 if (ret) 523 goto out; 524 ret = initxattrs(inode, new_xattrs, fs_data); 525 out: 526 for (xattr = new_xattrs; xattr->value != NULL; xattr++) 527 kfree(xattr->value); 528 return (ret == -EOPNOTSUPP) ? 0 : ret; 529 } 530 EXPORT_SYMBOL(security_inode_init_security); 531 532 int security_old_inode_init_security(struct inode *inode, struct inode *dir, 533 const struct qstr *qstr, const char **name, 534 void **value, size_t *len) 535 { 536 if (unlikely(IS_PRIVATE(inode))) 537 return -EOPNOTSUPP; 538 return call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir, 539 qstr, name, value, len); 540 } 541 EXPORT_SYMBOL(security_old_inode_init_security); 542 543 #ifdef CONFIG_SECURITY_PATH 544 int security_path_mknod(const struct path *dir, struct dentry *dentry, umode_t mode, 545 unsigned int dev) 546 { 547 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) 548 return 0; 549 return call_int_hook(path_mknod, 0, dir, dentry, mode, dev); 550 } 551 EXPORT_SYMBOL(security_path_mknod); 552 553 int security_path_mkdir(const struct path *dir, struct dentry *dentry, umode_t mode) 554 { 555 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) 556 return 0; 557 return call_int_hook(path_mkdir, 0, dir, dentry, mode); 558 } 559 EXPORT_SYMBOL(security_path_mkdir); 560 561 int security_path_rmdir(const struct path *dir, struct dentry *dentry) 562 { 563 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) 564 return 0; 565 return call_int_hook(path_rmdir, 0, dir, dentry); 566 } 567 568 int security_path_unlink(const struct path *dir, struct dentry *dentry) 569 { 570 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) 571 return 0; 572 return call_int_hook(path_unlink, 0, dir, dentry); 573 } 574 EXPORT_SYMBOL(security_path_unlink); 575 576 int security_path_symlink(const struct path *dir, struct dentry *dentry, 577 const char *old_name) 578 { 579 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) 580 return 0; 581 return call_int_hook(path_symlink, 0, dir, dentry, old_name); 582 } 583 584 int security_path_link(struct dentry *old_dentry, const struct path *new_dir, 585 struct dentry *new_dentry) 586 { 587 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)))) 588 return 0; 589 return call_int_hook(path_link, 0, old_dentry, new_dir, new_dentry); 590 } 591 592 int security_path_rename(const struct path *old_dir, struct dentry *old_dentry, 593 const struct path *new_dir, struct dentry *new_dentry, 594 unsigned int flags) 595 { 596 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) || 597 (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry))))) 598 return 0; 599 600 if (flags & RENAME_EXCHANGE) { 601 int err = call_int_hook(path_rename, 0, new_dir, new_dentry, 602 old_dir, old_dentry); 603 if (err) 604 return err; 605 } 606 607 return call_int_hook(path_rename, 0, old_dir, old_dentry, new_dir, 608 new_dentry); 609 } 610 EXPORT_SYMBOL(security_path_rename); 611 612 int security_path_truncate(const struct path *path) 613 { 614 if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry)))) 615 return 0; 616 return call_int_hook(path_truncate, 0, path); 617 } 618 619 int security_path_chmod(const struct path *path, umode_t mode) 620 { 621 if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry)))) 622 return 0; 623 return call_int_hook(path_chmod, 0, path, mode); 624 } 625 626 int security_path_chown(const struct path *path, kuid_t uid, kgid_t gid) 627 { 628 if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry)))) 629 return 0; 630 return call_int_hook(path_chown, 0, path, uid, gid); 631 } 632 633 int security_path_chroot(const struct path *path) 634 { 635 return call_int_hook(path_chroot, 0, path); 636 } 637 #endif 638 639 int security_inode_create(struct inode *dir, struct dentry *dentry, umode_t mode) 640 { 641 if (unlikely(IS_PRIVATE(dir))) 642 return 0; 643 return call_int_hook(inode_create, 0, dir, dentry, mode); 644 } 645 EXPORT_SYMBOL_GPL(security_inode_create); 646 647 int security_inode_link(struct dentry *old_dentry, struct inode *dir, 648 struct dentry *new_dentry) 649 { 650 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)))) 651 return 0; 652 return call_int_hook(inode_link, 0, old_dentry, dir, new_dentry); 653 } 654 655 int security_inode_unlink(struct inode *dir, struct dentry *dentry) 656 { 657 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 658 return 0; 659 return call_int_hook(inode_unlink, 0, dir, dentry); 660 } 661 662 int security_inode_symlink(struct inode *dir, struct dentry *dentry, 663 const char *old_name) 664 { 665 if (unlikely(IS_PRIVATE(dir))) 666 return 0; 667 return call_int_hook(inode_symlink, 0, dir, dentry, old_name); 668 } 669 670 int security_inode_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) 671 { 672 if (unlikely(IS_PRIVATE(dir))) 673 return 0; 674 return call_int_hook(inode_mkdir, 0, dir, dentry, mode); 675 } 676 EXPORT_SYMBOL_GPL(security_inode_mkdir); 677 678 int security_inode_rmdir(struct inode *dir, struct dentry *dentry) 679 { 680 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 681 return 0; 682 return call_int_hook(inode_rmdir, 0, dir, dentry); 683 } 684 685 int security_inode_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t dev) 686 { 687 if (unlikely(IS_PRIVATE(dir))) 688 return 0; 689 return call_int_hook(inode_mknod, 0, dir, dentry, mode, dev); 690 } 691 692 int security_inode_rename(struct inode *old_dir, struct dentry *old_dentry, 693 struct inode *new_dir, struct dentry *new_dentry, 694 unsigned int flags) 695 { 696 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) || 697 (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry))))) 698 return 0; 699 700 if (flags & RENAME_EXCHANGE) { 701 int err = call_int_hook(inode_rename, 0, new_dir, new_dentry, 702 old_dir, old_dentry); 703 if (err) 704 return err; 705 } 706 707 return call_int_hook(inode_rename, 0, old_dir, old_dentry, 708 new_dir, new_dentry); 709 } 710 711 int security_inode_readlink(struct dentry *dentry) 712 { 713 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 714 return 0; 715 return call_int_hook(inode_readlink, 0, dentry); 716 } 717 718 int security_inode_follow_link(struct dentry *dentry, struct inode *inode, 719 bool rcu) 720 { 721 if (unlikely(IS_PRIVATE(inode))) 722 return 0; 723 return call_int_hook(inode_follow_link, 0, dentry, inode, rcu); 724 } 725 726 int security_inode_permission(struct inode *inode, int mask) 727 { 728 if (unlikely(IS_PRIVATE(inode))) 729 return 0; 730 return call_int_hook(inode_permission, 0, inode, mask); 731 } 732 733 int security_inode_setattr(struct dentry *dentry, struct iattr *attr) 734 { 735 int ret; 736 737 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 738 return 0; 739 ret = call_int_hook(inode_setattr, 0, dentry, attr); 740 if (ret) 741 return ret; 742 return evm_inode_setattr(dentry, attr); 743 } 744 EXPORT_SYMBOL_GPL(security_inode_setattr); 745 746 int security_inode_getattr(const struct path *path) 747 { 748 if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry)))) 749 return 0; 750 return call_int_hook(inode_getattr, 0, path); 751 } 752 753 int security_inode_setxattr(struct dentry *dentry, const char *name, 754 const void *value, size_t size, int flags) 755 { 756 int ret; 757 758 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 759 return 0; 760 /* 761 * SELinux and Smack integrate the cap call, 762 * so assume that all LSMs supplying this call do so. 763 */ 764 ret = call_int_hook(inode_setxattr, 1, dentry, name, value, size, 765 flags); 766 767 if (ret == 1) 768 ret = cap_inode_setxattr(dentry, name, value, size, flags); 769 if (ret) 770 return ret; 771 ret = ima_inode_setxattr(dentry, name, value, size); 772 if (ret) 773 return ret; 774 return evm_inode_setxattr(dentry, name, value, size); 775 } 776 777 void security_inode_post_setxattr(struct dentry *dentry, const char *name, 778 const void *value, size_t size, int flags) 779 { 780 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 781 return; 782 call_void_hook(inode_post_setxattr, dentry, name, value, size, flags); 783 evm_inode_post_setxattr(dentry, name, value, size); 784 } 785 786 int security_inode_getxattr(struct dentry *dentry, const char *name) 787 { 788 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 789 return 0; 790 return call_int_hook(inode_getxattr, 0, dentry, name); 791 } 792 793 int security_inode_listxattr(struct dentry *dentry) 794 { 795 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 796 return 0; 797 return call_int_hook(inode_listxattr, 0, dentry); 798 } 799 800 int security_inode_removexattr(struct dentry *dentry, const char *name) 801 { 802 int ret; 803 804 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 805 return 0; 806 /* 807 * SELinux and Smack integrate the cap call, 808 * so assume that all LSMs supplying this call do so. 809 */ 810 ret = call_int_hook(inode_removexattr, 1, dentry, name); 811 if (ret == 1) 812 ret = cap_inode_removexattr(dentry, name); 813 if (ret) 814 return ret; 815 ret = ima_inode_removexattr(dentry, name); 816 if (ret) 817 return ret; 818 return evm_inode_removexattr(dentry, name); 819 } 820 821 int security_inode_need_killpriv(struct dentry *dentry) 822 { 823 return call_int_hook(inode_need_killpriv, 0, dentry); 824 } 825 826 int security_inode_killpriv(struct dentry *dentry) 827 { 828 return call_int_hook(inode_killpriv, 0, dentry); 829 } 830 831 int security_inode_getsecurity(struct inode *inode, const char *name, void **buffer, bool alloc) 832 { 833 struct security_hook_list *hp; 834 int rc; 835 836 if (unlikely(IS_PRIVATE(inode))) 837 return -EOPNOTSUPP; 838 /* 839 * Only one module will provide an attribute with a given name. 840 */ 841 hlist_for_each_entry(hp, &security_hook_heads.inode_getsecurity, list) { 842 rc = hp->hook.inode_getsecurity(inode, name, buffer, alloc); 843 if (rc != -EOPNOTSUPP) 844 return rc; 845 } 846 return -EOPNOTSUPP; 847 } 848 849 int security_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags) 850 { 851 struct security_hook_list *hp; 852 int rc; 853 854 if (unlikely(IS_PRIVATE(inode))) 855 return -EOPNOTSUPP; 856 /* 857 * Only one module will provide an attribute with a given name. 858 */ 859 hlist_for_each_entry(hp, &security_hook_heads.inode_setsecurity, list) { 860 rc = hp->hook.inode_setsecurity(inode, name, value, size, 861 flags); 862 if (rc != -EOPNOTSUPP) 863 return rc; 864 } 865 return -EOPNOTSUPP; 866 } 867 868 int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size) 869 { 870 if (unlikely(IS_PRIVATE(inode))) 871 return 0; 872 return call_int_hook(inode_listsecurity, 0, inode, buffer, buffer_size); 873 } 874 EXPORT_SYMBOL(security_inode_listsecurity); 875 876 void security_inode_getsecid(struct inode *inode, u32 *secid) 877 { 878 call_void_hook(inode_getsecid, inode, secid); 879 } 880 881 int security_inode_copy_up(struct dentry *src, struct cred **new) 882 { 883 return call_int_hook(inode_copy_up, 0, src, new); 884 } 885 EXPORT_SYMBOL(security_inode_copy_up); 886 887 int security_inode_copy_up_xattr(const char *name) 888 { 889 return call_int_hook(inode_copy_up_xattr, -EOPNOTSUPP, name); 890 } 891 EXPORT_SYMBOL(security_inode_copy_up_xattr); 892 893 int security_file_permission(struct file *file, int mask) 894 { 895 int ret; 896 897 ret = call_int_hook(file_permission, 0, file, mask); 898 if (ret) 899 return ret; 900 901 return fsnotify_perm(file, mask); 902 } 903 904 int security_file_alloc(struct file *file) 905 { 906 return call_int_hook(file_alloc_security, 0, file); 907 } 908 909 void security_file_free(struct file *file) 910 { 911 call_void_hook(file_free_security, file); 912 } 913 914 int security_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 915 { 916 return call_int_hook(file_ioctl, 0, file, cmd, arg); 917 } 918 919 static inline unsigned long mmap_prot(struct file *file, unsigned long prot) 920 { 921 /* 922 * Does we have PROT_READ and does the application expect 923 * it to imply PROT_EXEC? If not, nothing to talk about... 924 */ 925 if ((prot & (PROT_READ | PROT_EXEC)) != PROT_READ) 926 return prot; 927 if (!(current->personality & READ_IMPLIES_EXEC)) 928 return prot; 929 /* 930 * if that's an anonymous mapping, let it. 931 */ 932 if (!file) 933 return prot | PROT_EXEC; 934 /* 935 * ditto if it's not on noexec mount, except that on !MMU we need 936 * NOMMU_MAP_EXEC (== VM_MAYEXEC) in this case 937 */ 938 if (!path_noexec(&file->f_path)) { 939 #ifndef CONFIG_MMU 940 if (file->f_op->mmap_capabilities) { 941 unsigned caps = file->f_op->mmap_capabilities(file); 942 if (!(caps & NOMMU_MAP_EXEC)) 943 return prot; 944 } 945 #endif 946 return prot | PROT_EXEC; 947 } 948 /* anything on noexec mount won't get PROT_EXEC */ 949 return prot; 950 } 951 952 int security_mmap_file(struct file *file, unsigned long prot, 953 unsigned long flags) 954 { 955 int ret; 956 ret = call_int_hook(mmap_file, 0, file, prot, 957 mmap_prot(file, prot), flags); 958 if (ret) 959 return ret; 960 return ima_file_mmap(file, prot); 961 } 962 963 int security_mmap_addr(unsigned long addr) 964 { 965 return call_int_hook(mmap_addr, 0, addr); 966 } 967 968 int security_file_mprotect(struct vm_area_struct *vma, unsigned long reqprot, 969 unsigned long prot) 970 { 971 return call_int_hook(file_mprotect, 0, vma, reqprot, prot); 972 } 973 974 int security_file_lock(struct file *file, unsigned int cmd) 975 { 976 return call_int_hook(file_lock, 0, file, cmd); 977 } 978 979 int security_file_fcntl(struct file *file, unsigned int cmd, unsigned long arg) 980 { 981 return call_int_hook(file_fcntl, 0, file, cmd, arg); 982 } 983 984 void security_file_set_fowner(struct file *file) 985 { 986 call_void_hook(file_set_fowner, file); 987 } 988 989 int security_file_send_sigiotask(struct task_struct *tsk, 990 struct fown_struct *fown, int sig) 991 { 992 return call_int_hook(file_send_sigiotask, 0, tsk, fown, sig); 993 } 994 995 int security_file_receive(struct file *file) 996 { 997 return call_int_hook(file_receive, 0, file); 998 } 999 1000 int security_file_open(struct file *file) 1001 { 1002 int ret; 1003 1004 ret = call_int_hook(file_open, 0, file); 1005 if (ret) 1006 return ret; 1007 1008 return fsnotify_perm(file, MAY_OPEN); 1009 } 1010 1011 int security_task_alloc(struct task_struct *task, unsigned long clone_flags) 1012 { 1013 return call_int_hook(task_alloc, 0, task, clone_flags); 1014 } 1015 1016 void security_task_free(struct task_struct *task) 1017 { 1018 call_void_hook(task_free, task); 1019 } 1020 1021 int security_cred_alloc_blank(struct cred *cred, gfp_t gfp) 1022 { 1023 return call_int_hook(cred_alloc_blank, 0, cred, gfp); 1024 } 1025 1026 void security_cred_free(struct cred *cred) 1027 { 1028 call_void_hook(cred_free, cred); 1029 } 1030 1031 int security_prepare_creds(struct cred *new, const struct cred *old, gfp_t gfp) 1032 { 1033 return call_int_hook(cred_prepare, 0, new, old, gfp); 1034 } 1035 1036 void security_transfer_creds(struct cred *new, const struct cred *old) 1037 { 1038 call_void_hook(cred_transfer, new, old); 1039 } 1040 1041 void security_cred_getsecid(const struct cred *c, u32 *secid) 1042 { 1043 *secid = 0; 1044 call_void_hook(cred_getsecid, c, secid); 1045 } 1046 EXPORT_SYMBOL(security_cred_getsecid); 1047 1048 int security_kernel_act_as(struct cred *new, u32 secid) 1049 { 1050 return call_int_hook(kernel_act_as, 0, new, secid); 1051 } 1052 1053 int security_kernel_create_files_as(struct cred *new, struct inode *inode) 1054 { 1055 return call_int_hook(kernel_create_files_as, 0, new, inode); 1056 } 1057 1058 int security_kernel_module_request(char *kmod_name) 1059 { 1060 int ret; 1061 1062 ret = call_int_hook(kernel_module_request, 0, kmod_name); 1063 if (ret) 1064 return ret; 1065 return integrity_kernel_module_request(kmod_name); 1066 } 1067 1068 int security_kernel_read_file(struct file *file, enum kernel_read_file_id id) 1069 { 1070 int ret; 1071 1072 ret = call_int_hook(kernel_read_file, 0, file, id); 1073 if (ret) 1074 return ret; 1075 return ima_read_file(file, id); 1076 } 1077 EXPORT_SYMBOL_GPL(security_kernel_read_file); 1078 1079 int security_kernel_post_read_file(struct file *file, char *buf, loff_t size, 1080 enum kernel_read_file_id id) 1081 { 1082 int ret; 1083 1084 ret = call_int_hook(kernel_post_read_file, 0, file, buf, size, id); 1085 if (ret) 1086 return ret; 1087 return ima_post_read_file(file, buf, size, id); 1088 } 1089 EXPORT_SYMBOL_GPL(security_kernel_post_read_file); 1090 1091 int security_kernel_load_data(enum kernel_load_data_id id) 1092 { 1093 int ret; 1094 1095 ret = call_int_hook(kernel_load_data, 0, id); 1096 if (ret) 1097 return ret; 1098 return ima_load_data(id); 1099 } 1100 EXPORT_SYMBOL_GPL(security_kernel_load_data); 1101 1102 int security_task_fix_setuid(struct cred *new, const struct cred *old, 1103 int flags) 1104 { 1105 return call_int_hook(task_fix_setuid, 0, new, old, flags); 1106 } 1107 1108 int security_task_setpgid(struct task_struct *p, pid_t pgid) 1109 { 1110 return call_int_hook(task_setpgid, 0, p, pgid); 1111 } 1112 1113 int security_task_getpgid(struct task_struct *p) 1114 { 1115 return call_int_hook(task_getpgid, 0, p); 1116 } 1117 1118 int security_task_getsid(struct task_struct *p) 1119 { 1120 return call_int_hook(task_getsid, 0, p); 1121 } 1122 1123 void security_task_getsecid(struct task_struct *p, u32 *secid) 1124 { 1125 *secid = 0; 1126 call_void_hook(task_getsecid, p, secid); 1127 } 1128 EXPORT_SYMBOL(security_task_getsecid); 1129 1130 int security_task_setnice(struct task_struct *p, int nice) 1131 { 1132 return call_int_hook(task_setnice, 0, p, nice); 1133 } 1134 1135 int security_task_setioprio(struct task_struct *p, int ioprio) 1136 { 1137 return call_int_hook(task_setioprio, 0, p, ioprio); 1138 } 1139 1140 int security_task_getioprio(struct task_struct *p) 1141 { 1142 return call_int_hook(task_getioprio, 0, p); 1143 } 1144 1145 int security_task_prlimit(const struct cred *cred, const struct cred *tcred, 1146 unsigned int flags) 1147 { 1148 return call_int_hook(task_prlimit, 0, cred, tcred, flags); 1149 } 1150 1151 int security_task_setrlimit(struct task_struct *p, unsigned int resource, 1152 struct rlimit *new_rlim) 1153 { 1154 return call_int_hook(task_setrlimit, 0, p, resource, new_rlim); 1155 } 1156 1157 int security_task_setscheduler(struct task_struct *p) 1158 { 1159 return call_int_hook(task_setscheduler, 0, p); 1160 } 1161 1162 int security_task_getscheduler(struct task_struct *p) 1163 { 1164 return call_int_hook(task_getscheduler, 0, p); 1165 } 1166 1167 int security_task_movememory(struct task_struct *p) 1168 { 1169 return call_int_hook(task_movememory, 0, p); 1170 } 1171 1172 int security_task_kill(struct task_struct *p, struct kernel_siginfo *info, 1173 int sig, const struct cred *cred) 1174 { 1175 return call_int_hook(task_kill, 0, p, info, sig, cred); 1176 } 1177 1178 int security_task_prctl(int option, unsigned long arg2, unsigned long arg3, 1179 unsigned long arg4, unsigned long arg5) 1180 { 1181 int thisrc; 1182 int rc = -ENOSYS; 1183 struct security_hook_list *hp; 1184 1185 hlist_for_each_entry(hp, &security_hook_heads.task_prctl, list) { 1186 thisrc = hp->hook.task_prctl(option, arg2, arg3, arg4, arg5); 1187 if (thisrc != -ENOSYS) { 1188 rc = thisrc; 1189 if (thisrc != 0) 1190 break; 1191 } 1192 } 1193 return rc; 1194 } 1195 1196 void security_task_to_inode(struct task_struct *p, struct inode *inode) 1197 { 1198 call_void_hook(task_to_inode, p, inode); 1199 } 1200 1201 int security_ipc_permission(struct kern_ipc_perm *ipcp, short flag) 1202 { 1203 return call_int_hook(ipc_permission, 0, ipcp, flag); 1204 } 1205 1206 void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid) 1207 { 1208 *secid = 0; 1209 call_void_hook(ipc_getsecid, ipcp, secid); 1210 } 1211 1212 int security_msg_msg_alloc(struct msg_msg *msg) 1213 { 1214 return call_int_hook(msg_msg_alloc_security, 0, msg); 1215 } 1216 1217 void security_msg_msg_free(struct msg_msg *msg) 1218 { 1219 call_void_hook(msg_msg_free_security, msg); 1220 } 1221 1222 int security_msg_queue_alloc(struct kern_ipc_perm *msq) 1223 { 1224 return call_int_hook(msg_queue_alloc_security, 0, msq); 1225 } 1226 1227 void security_msg_queue_free(struct kern_ipc_perm *msq) 1228 { 1229 call_void_hook(msg_queue_free_security, msq); 1230 } 1231 1232 int security_msg_queue_associate(struct kern_ipc_perm *msq, int msqflg) 1233 { 1234 return call_int_hook(msg_queue_associate, 0, msq, msqflg); 1235 } 1236 1237 int security_msg_queue_msgctl(struct kern_ipc_perm *msq, int cmd) 1238 { 1239 return call_int_hook(msg_queue_msgctl, 0, msq, cmd); 1240 } 1241 1242 int security_msg_queue_msgsnd(struct kern_ipc_perm *msq, 1243 struct msg_msg *msg, int msqflg) 1244 { 1245 return call_int_hook(msg_queue_msgsnd, 0, msq, msg, msqflg); 1246 } 1247 1248 int security_msg_queue_msgrcv(struct kern_ipc_perm *msq, struct msg_msg *msg, 1249 struct task_struct *target, long type, int mode) 1250 { 1251 return call_int_hook(msg_queue_msgrcv, 0, msq, msg, target, type, mode); 1252 } 1253 1254 int security_shm_alloc(struct kern_ipc_perm *shp) 1255 { 1256 return call_int_hook(shm_alloc_security, 0, shp); 1257 } 1258 1259 void security_shm_free(struct kern_ipc_perm *shp) 1260 { 1261 call_void_hook(shm_free_security, shp); 1262 } 1263 1264 int security_shm_associate(struct kern_ipc_perm *shp, int shmflg) 1265 { 1266 return call_int_hook(shm_associate, 0, shp, shmflg); 1267 } 1268 1269 int security_shm_shmctl(struct kern_ipc_perm *shp, int cmd) 1270 { 1271 return call_int_hook(shm_shmctl, 0, shp, cmd); 1272 } 1273 1274 int security_shm_shmat(struct kern_ipc_perm *shp, char __user *shmaddr, int shmflg) 1275 { 1276 return call_int_hook(shm_shmat, 0, shp, shmaddr, shmflg); 1277 } 1278 1279 int security_sem_alloc(struct kern_ipc_perm *sma) 1280 { 1281 return call_int_hook(sem_alloc_security, 0, sma); 1282 } 1283 1284 void security_sem_free(struct kern_ipc_perm *sma) 1285 { 1286 call_void_hook(sem_free_security, sma); 1287 } 1288 1289 int security_sem_associate(struct kern_ipc_perm *sma, int semflg) 1290 { 1291 return call_int_hook(sem_associate, 0, sma, semflg); 1292 } 1293 1294 int security_sem_semctl(struct kern_ipc_perm *sma, int cmd) 1295 { 1296 return call_int_hook(sem_semctl, 0, sma, cmd); 1297 } 1298 1299 int security_sem_semop(struct kern_ipc_perm *sma, struct sembuf *sops, 1300 unsigned nsops, int alter) 1301 { 1302 return call_int_hook(sem_semop, 0, sma, sops, nsops, alter); 1303 } 1304 1305 void security_d_instantiate(struct dentry *dentry, struct inode *inode) 1306 { 1307 if (unlikely(inode && IS_PRIVATE(inode))) 1308 return; 1309 call_void_hook(d_instantiate, dentry, inode); 1310 } 1311 EXPORT_SYMBOL(security_d_instantiate); 1312 1313 int security_getprocattr(struct task_struct *p, char *name, char **value) 1314 { 1315 return call_int_hook(getprocattr, -EINVAL, p, name, value); 1316 } 1317 1318 int security_setprocattr(const char *name, void *value, size_t size) 1319 { 1320 return call_int_hook(setprocattr, -EINVAL, name, value, size); 1321 } 1322 1323 int security_netlink_send(struct sock *sk, struct sk_buff *skb) 1324 { 1325 return call_int_hook(netlink_send, 0, sk, skb); 1326 } 1327 1328 int security_ismaclabel(const char *name) 1329 { 1330 return call_int_hook(ismaclabel, 0, name); 1331 } 1332 EXPORT_SYMBOL(security_ismaclabel); 1333 1334 int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen) 1335 { 1336 return call_int_hook(secid_to_secctx, -EOPNOTSUPP, secid, secdata, 1337 seclen); 1338 } 1339 EXPORT_SYMBOL(security_secid_to_secctx); 1340 1341 int security_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid) 1342 { 1343 *secid = 0; 1344 return call_int_hook(secctx_to_secid, 0, secdata, seclen, secid); 1345 } 1346 EXPORT_SYMBOL(security_secctx_to_secid); 1347 1348 void security_release_secctx(char *secdata, u32 seclen) 1349 { 1350 call_void_hook(release_secctx, secdata, seclen); 1351 } 1352 EXPORT_SYMBOL(security_release_secctx); 1353 1354 void security_inode_invalidate_secctx(struct inode *inode) 1355 { 1356 call_void_hook(inode_invalidate_secctx, inode); 1357 } 1358 EXPORT_SYMBOL(security_inode_invalidate_secctx); 1359 1360 int security_inode_notifysecctx(struct inode *inode, void *ctx, u32 ctxlen) 1361 { 1362 return call_int_hook(inode_notifysecctx, 0, inode, ctx, ctxlen); 1363 } 1364 EXPORT_SYMBOL(security_inode_notifysecctx); 1365 1366 int security_inode_setsecctx(struct dentry *dentry, void *ctx, u32 ctxlen) 1367 { 1368 return call_int_hook(inode_setsecctx, 0, dentry, ctx, ctxlen); 1369 } 1370 EXPORT_SYMBOL(security_inode_setsecctx); 1371 1372 int security_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen) 1373 { 1374 return call_int_hook(inode_getsecctx, -EOPNOTSUPP, inode, ctx, ctxlen); 1375 } 1376 EXPORT_SYMBOL(security_inode_getsecctx); 1377 1378 #ifdef CONFIG_SECURITY_NETWORK 1379 1380 int security_unix_stream_connect(struct sock *sock, struct sock *other, struct sock *newsk) 1381 { 1382 return call_int_hook(unix_stream_connect, 0, sock, other, newsk); 1383 } 1384 EXPORT_SYMBOL(security_unix_stream_connect); 1385 1386 int security_unix_may_send(struct socket *sock, struct socket *other) 1387 { 1388 return call_int_hook(unix_may_send, 0, sock, other); 1389 } 1390 EXPORT_SYMBOL(security_unix_may_send); 1391 1392 int security_socket_create(int family, int type, int protocol, int kern) 1393 { 1394 return call_int_hook(socket_create, 0, family, type, protocol, kern); 1395 } 1396 1397 int security_socket_post_create(struct socket *sock, int family, 1398 int type, int protocol, int kern) 1399 { 1400 return call_int_hook(socket_post_create, 0, sock, family, type, 1401 protocol, kern); 1402 } 1403 1404 int security_socket_socketpair(struct socket *socka, struct socket *sockb) 1405 { 1406 return call_int_hook(socket_socketpair, 0, socka, sockb); 1407 } 1408 EXPORT_SYMBOL(security_socket_socketpair); 1409 1410 int security_socket_bind(struct socket *sock, struct sockaddr *address, int addrlen) 1411 { 1412 return call_int_hook(socket_bind, 0, sock, address, addrlen); 1413 } 1414 1415 int security_socket_connect(struct socket *sock, struct sockaddr *address, int addrlen) 1416 { 1417 return call_int_hook(socket_connect, 0, sock, address, addrlen); 1418 } 1419 1420 int security_socket_listen(struct socket *sock, int backlog) 1421 { 1422 return call_int_hook(socket_listen, 0, sock, backlog); 1423 } 1424 1425 int security_socket_accept(struct socket *sock, struct socket *newsock) 1426 { 1427 return call_int_hook(socket_accept, 0, sock, newsock); 1428 } 1429 1430 int security_socket_sendmsg(struct socket *sock, struct msghdr *msg, int size) 1431 { 1432 return call_int_hook(socket_sendmsg, 0, sock, msg, size); 1433 } 1434 1435 int security_socket_recvmsg(struct socket *sock, struct msghdr *msg, 1436 int size, int flags) 1437 { 1438 return call_int_hook(socket_recvmsg, 0, sock, msg, size, flags); 1439 } 1440 1441 int security_socket_getsockname(struct socket *sock) 1442 { 1443 return call_int_hook(socket_getsockname, 0, sock); 1444 } 1445 1446 int security_socket_getpeername(struct socket *sock) 1447 { 1448 return call_int_hook(socket_getpeername, 0, sock); 1449 } 1450 1451 int security_socket_getsockopt(struct socket *sock, int level, int optname) 1452 { 1453 return call_int_hook(socket_getsockopt, 0, sock, level, optname); 1454 } 1455 1456 int security_socket_setsockopt(struct socket *sock, int level, int optname) 1457 { 1458 return call_int_hook(socket_setsockopt, 0, sock, level, optname); 1459 } 1460 1461 int security_socket_shutdown(struct socket *sock, int how) 1462 { 1463 return call_int_hook(socket_shutdown, 0, sock, how); 1464 } 1465 1466 int security_sock_rcv_skb(struct sock *sk, struct sk_buff *skb) 1467 { 1468 return call_int_hook(socket_sock_rcv_skb, 0, sk, skb); 1469 } 1470 EXPORT_SYMBOL(security_sock_rcv_skb); 1471 1472 int security_socket_getpeersec_stream(struct socket *sock, char __user *optval, 1473 int __user *optlen, unsigned len) 1474 { 1475 return call_int_hook(socket_getpeersec_stream, -ENOPROTOOPT, sock, 1476 optval, optlen, len); 1477 } 1478 1479 int security_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb, u32 *secid) 1480 { 1481 return call_int_hook(socket_getpeersec_dgram, -ENOPROTOOPT, sock, 1482 skb, secid); 1483 } 1484 EXPORT_SYMBOL(security_socket_getpeersec_dgram); 1485 1486 int security_sk_alloc(struct sock *sk, int family, gfp_t priority) 1487 { 1488 return call_int_hook(sk_alloc_security, 0, sk, family, priority); 1489 } 1490 1491 void security_sk_free(struct sock *sk) 1492 { 1493 call_void_hook(sk_free_security, sk); 1494 } 1495 1496 void security_sk_clone(const struct sock *sk, struct sock *newsk) 1497 { 1498 call_void_hook(sk_clone_security, sk, newsk); 1499 } 1500 EXPORT_SYMBOL(security_sk_clone); 1501 1502 void security_sk_classify_flow(struct sock *sk, struct flowi *fl) 1503 { 1504 call_void_hook(sk_getsecid, sk, &fl->flowi_secid); 1505 } 1506 EXPORT_SYMBOL(security_sk_classify_flow); 1507 1508 void security_req_classify_flow(const struct request_sock *req, struct flowi *fl) 1509 { 1510 call_void_hook(req_classify_flow, req, fl); 1511 } 1512 EXPORT_SYMBOL(security_req_classify_flow); 1513 1514 void security_sock_graft(struct sock *sk, struct socket *parent) 1515 { 1516 call_void_hook(sock_graft, sk, parent); 1517 } 1518 EXPORT_SYMBOL(security_sock_graft); 1519 1520 int security_inet_conn_request(struct sock *sk, 1521 struct sk_buff *skb, struct request_sock *req) 1522 { 1523 return call_int_hook(inet_conn_request, 0, sk, skb, req); 1524 } 1525 EXPORT_SYMBOL(security_inet_conn_request); 1526 1527 void security_inet_csk_clone(struct sock *newsk, 1528 const struct request_sock *req) 1529 { 1530 call_void_hook(inet_csk_clone, newsk, req); 1531 } 1532 1533 void security_inet_conn_established(struct sock *sk, 1534 struct sk_buff *skb) 1535 { 1536 call_void_hook(inet_conn_established, sk, skb); 1537 } 1538 EXPORT_SYMBOL(security_inet_conn_established); 1539 1540 int security_secmark_relabel_packet(u32 secid) 1541 { 1542 return call_int_hook(secmark_relabel_packet, 0, secid); 1543 } 1544 EXPORT_SYMBOL(security_secmark_relabel_packet); 1545 1546 void security_secmark_refcount_inc(void) 1547 { 1548 call_void_hook(secmark_refcount_inc); 1549 } 1550 EXPORT_SYMBOL(security_secmark_refcount_inc); 1551 1552 void security_secmark_refcount_dec(void) 1553 { 1554 call_void_hook(secmark_refcount_dec); 1555 } 1556 EXPORT_SYMBOL(security_secmark_refcount_dec); 1557 1558 int security_tun_dev_alloc_security(void **security) 1559 { 1560 return call_int_hook(tun_dev_alloc_security, 0, security); 1561 } 1562 EXPORT_SYMBOL(security_tun_dev_alloc_security); 1563 1564 void security_tun_dev_free_security(void *security) 1565 { 1566 call_void_hook(tun_dev_free_security, security); 1567 } 1568 EXPORT_SYMBOL(security_tun_dev_free_security); 1569 1570 int security_tun_dev_create(void) 1571 { 1572 return call_int_hook(tun_dev_create, 0); 1573 } 1574 EXPORT_SYMBOL(security_tun_dev_create); 1575 1576 int security_tun_dev_attach_queue(void *security) 1577 { 1578 return call_int_hook(tun_dev_attach_queue, 0, security); 1579 } 1580 EXPORT_SYMBOL(security_tun_dev_attach_queue); 1581 1582 int security_tun_dev_attach(struct sock *sk, void *security) 1583 { 1584 return call_int_hook(tun_dev_attach, 0, sk, security); 1585 } 1586 EXPORT_SYMBOL(security_tun_dev_attach); 1587 1588 int security_tun_dev_open(void *security) 1589 { 1590 return call_int_hook(tun_dev_open, 0, security); 1591 } 1592 EXPORT_SYMBOL(security_tun_dev_open); 1593 1594 int security_sctp_assoc_request(struct sctp_endpoint *ep, struct sk_buff *skb) 1595 { 1596 return call_int_hook(sctp_assoc_request, 0, ep, skb); 1597 } 1598 EXPORT_SYMBOL(security_sctp_assoc_request); 1599 1600 int security_sctp_bind_connect(struct sock *sk, int optname, 1601 struct sockaddr *address, int addrlen) 1602 { 1603 return call_int_hook(sctp_bind_connect, 0, sk, optname, 1604 address, addrlen); 1605 } 1606 EXPORT_SYMBOL(security_sctp_bind_connect); 1607 1608 void security_sctp_sk_clone(struct sctp_endpoint *ep, struct sock *sk, 1609 struct sock *newsk) 1610 { 1611 call_void_hook(sctp_sk_clone, ep, sk, newsk); 1612 } 1613 EXPORT_SYMBOL(security_sctp_sk_clone); 1614 1615 #endif /* CONFIG_SECURITY_NETWORK */ 1616 1617 #ifdef CONFIG_SECURITY_INFINIBAND 1618 1619 int security_ib_pkey_access(void *sec, u64 subnet_prefix, u16 pkey) 1620 { 1621 return call_int_hook(ib_pkey_access, 0, sec, subnet_prefix, pkey); 1622 } 1623 EXPORT_SYMBOL(security_ib_pkey_access); 1624 1625 int security_ib_endport_manage_subnet(void *sec, const char *dev_name, u8 port_num) 1626 { 1627 return call_int_hook(ib_endport_manage_subnet, 0, sec, dev_name, port_num); 1628 } 1629 EXPORT_SYMBOL(security_ib_endport_manage_subnet); 1630 1631 int security_ib_alloc_security(void **sec) 1632 { 1633 return call_int_hook(ib_alloc_security, 0, sec); 1634 } 1635 EXPORT_SYMBOL(security_ib_alloc_security); 1636 1637 void security_ib_free_security(void *sec) 1638 { 1639 call_void_hook(ib_free_security, sec); 1640 } 1641 EXPORT_SYMBOL(security_ib_free_security); 1642 #endif /* CONFIG_SECURITY_INFINIBAND */ 1643 1644 #ifdef CONFIG_SECURITY_NETWORK_XFRM 1645 1646 int security_xfrm_policy_alloc(struct xfrm_sec_ctx **ctxp, 1647 struct xfrm_user_sec_ctx *sec_ctx, 1648 gfp_t gfp) 1649 { 1650 return call_int_hook(xfrm_policy_alloc_security, 0, ctxp, sec_ctx, gfp); 1651 } 1652 EXPORT_SYMBOL(security_xfrm_policy_alloc); 1653 1654 int security_xfrm_policy_clone(struct xfrm_sec_ctx *old_ctx, 1655 struct xfrm_sec_ctx **new_ctxp) 1656 { 1657 return call_int_hook(xfrm_policy_clone_security, 0, old_ctx, new_ctxp); 1658 } 1659 1660 void security_xfrm_policy_free(struct xfrm_sec_ctx *ctx) 1661 { 1662 call_void_hook(xfrm_policy_free_security, ctx); 1663 } 1664 EXPORT_SYMBOL(security_xfrm_policy_free); 1665 1666 int security_xfrm_policy_delete(struct xfrm_sec_ctx *ctx) 1667 { 1668 return call_int_hook(xfrm_policy_delete_security, 0, ctx); 1669 } 1670 1671 int security_xfrm_state_alloc(struct xfrm_state *x, 1672 struct xfrm_user_sec_ctx *sec_ctx) 1673 { 1674 return call_int_hook(xfrm_state_alloc, 0, x, sec_ctx); 1675 } 1676 EXPORT_SYMBOL(security_xfrm_state_alloc); 1677 1678 int security_xfrm_state_alloc_acquire(struct xfrm_state *x, 1679 struct xfrm_sec_ctx *polsec, u32 secid) 1680 { 1681 return call_int_hook(xfrm_state_alloc_acquire, 0, x, polsec, secid); 1682 } 1683 1684 int security_xfrm_state_delete(struct xfrm_state *x) 1685 { 1686 return call_int_hook(xfrm_state_delete_security, 0, x); 1687 } 1688 EXPORT_SYMBOL(security_xfrm_state_delete); 1689 1690 void security_xfrm_state_free(struct xfrm_state *x) 1691 { 1692 call_void_hook(xfrm_state_free_security, x); 1693 } 1694 1695 int security_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir) 1696 { 1697 return call_int_hook(xfrm_policy_lookup, 0, ctx, fl_secid, dir); 1698 } 1699 1700 int security_xfrm_state_pol_flow_match(struct xfrm_state *x, 1701 struct xfrm_policy *xp, 1702 const struct flowi *fl) 1703 { 1704 struct security_hook_list *hp; 1705 int rc = 1; 1706 1707 /* 1708 * Since this function is expected to return 0 or 1, the judgment 1709 * becomes difficult if multiple LSMs supply this call. Fortunately, 1710 * we can use the first LSM's judgment because currently only SELinux 1711 * supplies this call. 1712 * 1713 * For speed optimization, we explicitly break the loop rather than 1714 * using the macro 1715 */ 1716 hlist_for_each_entry(hp, &security_hook_heads.xfrm_state_pol_flow_match, 1717 list) { 1718 rc = hp->hook.xfrm_state_pol_flow_match(x, xp, fl); 1719 break; 1720 } 1721 return rc; 1722 } 1723 1724 int security_xfrm_decode_session(struct sk_buff *skb, u32 *secid) 1725 { 1726 return call_int_hook(xfrm_decode_session, 0, skb, secid, 1); 1727 } 1728 1729 void security_skb_classify_flow(struct sk_buff *skb, struct flowi *fl) 1730 { 1731 int rc = call_int_hook(xfrm_decode_session, 0, skb, &fl->flowi_secid, 1732 0); 1733 1734 BUG_ON(rc); 1735 } 1736 EXPORT_SYMBOL(security_skb_classify_flow); 1737 1738 #endif /* CONFIG_SECURITY_NETWORK_XFRM */ 1739 1740 #ifdef CONFIG_KEYS 1741 1742 int security_key_alloc(struct key *key, const struct cred *cred, 1743 unsigned long flags) 1744 { 1745 return call_int_hook(key_alloc, 0, key, cred, flags); 1746 } 1747 1748 void security_key_free(struct key *key) 1749 { 1750 call_void_hook(key_free, key); 1751 } 1752 1753 int security_key_permission(key_ref_t key_ref, 1754 const struct cred *cred, unsigned perm) 1755 { 1756 return call_int_hook(key_permission, 0, key_ref, cred, perm); 1757 } 1758 1759 int security_key_getsecurity(struct key *key, char **_buffer) 1760 { 1761 *_buffer = NULL; 1762 return call_int_hook(key_getsecurity, 0, key, _buffer); 1763 } 1764 1765 #endif /* CONFIG_KEYS */ 1766 1767 #ifdef CONFIG_AUDIT 1768 1769 int security_audit_rule_init(u32 field, u32 op, char *rulestr, void **lsmrule) 1770 { 1771 return call_int_hook(audit_rule_init, 0, field, op, rulestr, lsmrule); 1772 } 1773 1774 int security_audit_rule_known(struct audit_krule *krule) 1775 { 1776 return call_int_hook(audit_rule_known, 0, krule); 1777 } 1778 1779 void security_audit_rule_free(void *lsmrule) 1780 { 1781 call_void_hook(audit_rule_free, lsmrule); 1782 } 1783 1784 int security_audit_rule_match(u32 secid, u32 field, u32 op, void *lsmrule, 1785 struct audit_context *actx) 1786 { 1787 return call_int_hook(audit_rule_match, 0, secid, field, op, lsmrule, 1788 actx); 1789 } 1790 #endif /* CONFIG_AUDIT */ 1791 1792 #ifdef CONFIG_BPF_SYSCALL 1793 int security_bpf(int cmd, union bpf_attr *attr, unsigned int size) 1794 { 1795 return call_int_hook(bpf, 0, cmd, attr, size); 1796 } 1797 int security_bpf_map(struct bpf_map *map, fmode_t fmode) 1798 { 1799 return call_int_hook(bpf_map, 0, map, fmode); 1800 } 1801 int security_bpf_prog(struct bpf_prog *prog) 1802 { 1803 return call_int_hook(bpf_prog, 0, prog); 1804 } 1805 int security_bpf_map_alloc(struct bpf_map *map) 1806 { 1807 return call_int_hook(bpf_map_alloc_security, 0, map); 1808 } 1809 int security_bpf_prog_alloc(struct bpf_prog_aux *aux) 1810 { 1811 return call_int_hook(bpf_prog_alloc_security, 0, aux); 1812 } 1813 void security_bpf_map_free(struct bpf_map *map) 1814 { 1815 call_void_hook(bpf_map_free_security, map); 1816 } 1817 void security_bpf_prog_free(struct bpf_prog_aux *aux) 1818 { 1819 call_void_hook(bpf_prog_free_security, aux); 1820 } 1821 #endif /* CONFIG_BPF_SYSCALL */ 1822