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