1 /* 2 * Security plug functions 3 * 4 * Copyright (C) 2001 WireX Communications, Inc <chris@wirex.com> 5 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com> 6 * Copyright (C) 2001 Networks Associates Technology, Inc <ssmalley@nai.com> 7 * Copyright (C) 2016 Mellanox Technologies 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2 of the License, or 12 * (at your option) any later version. 13 */ 14 15 #define pr_fmt(fmt) "LSM: " fmt 16 17 #include <linux/bpf.h> 18 #include <linux/capability.h> 19 #include <linux/dcache.h> 20 #include <linux/module.h> 21 #include <linux/init.h> 22 #include <linux/kernel.h> 23 #include <linux/lsm_hooks.h> 24 #include <linux/integrity.h> 25 #include <linux/ima.h> 26 #include <linux/evm.h> 27 #include <linux/fsnotify.h> 28 #include <linux/mman.h> 29 #include <linux/mount.h> 30 #include <linux/personality.h> 31 #include <linux/backing-dev.h> 32 #include <linux/string.h> 33 #include <net/flow.h> 34 35 #define MAX_LSM_EVM_XATTR 2 36 37 /* Maximum number of letters for an LSM name string */ 38 #define SECURITY_NAME_MAX 10 39 40 struct security_hook_heads security_hook_heads __lsm_ro_after_init; 41 static ATOMIC_NOTIFIER_HEAD(lsm_notifier_chain); 42 43 char *lsm_names; 44 /* Boot-time LSM user choice */ 45 static __initdata char chosen_lsm[SECURITY_NAME_MAX + 1] = 46 CONFIG_DEFAULT_SECURITY; 47 48 static __initdata bool debug; 49 #define init_debug(...) \ 50 do { \ 51 if (debug) \ 52 pr_info(__VA_ARGS__); \ 53 } while (0) 54 55 static void __init major_lsm_init(void) 56 { 57 struct lsm_info *lsm; 58 int ret; 59 60 for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) { 61 init_debug("initializing %s\n", lsm->name); 62 ret = lsm->init(); 63 WARN(ret, "%s failed to initialize: %d\n", lsm->name, ret); 64 } 65 } 66 67 /** 68 * security_init - initializes the security framework 69 * 70 * This should be called early in the kernel initialization sequence. 71 */ 72 int __init security_init(void) 73 { 74 int i; 75 struct hlist_head *list = (struct hlist_head *) &security_hook_heads; 76 77 pr_info("Security Framework initializing\n"); 78 79 for (i = 0; i < sizeof(security_hook_heads) / sizeof(struct hlist_head); 80 i++) 81 INIT_HLIST_HEAD(&list[i]); 82 83 /* 84 * Load minor LSMs, with the capability module always first. 85 */ 86 capability_add_hooks(); 87 yama_add_hooks(); 88 loadpin_add_hooks(); 89 90 /* 91 * Load all the remaining security modules. 92 */ 93 major_lsm_init(); 94 95 return 0; 96 } 97 98 /* Save user chosen LSM */ 99 static int __init choose_lsm(char *str) 100 { 101 strncpy(chosen_lsm, str, SECURITY_NAME_MAX); 102 return 1; 103 } 104 __setup("security=", choose_lsm); 105 106 /* Enable LSM order debugging. */ 107 static int __init enable_debug(char *str) 108 { 109 debug = true; 110 return 1; 111 } 112 __setup("lsm.debug", enable_debug); 113 114 static bool match_last_lsm(const char *list, const char *lsm) 115 { 116 const char *last; 117 118 if (WARN_ON(!list || !lsm)) 119 return false; 120 last = strrchr(list, ','); 121 if (last) 122 /* Pass the comma, strcmp() will check for '\0' */ 123 last++; 124 else 125 last = list; 126 return !strcmp(last, lsm); 127 } 128 129 static int lsm_append(char *new, char **result) 130 { 131 char *cp; 132 133 if (*result == NULL) { 134 *result = kstrdup(new, GFP_KERNEL); 135 if (*result == NULL) 136 return -ENOMEM; 137 } else { 138 /* Check if it is the last registered name */ 139 if (match_last_lsm(*result, new)) 140 return 0; 141 cp = kasprintf(GFP_KERNEL, "%s,%s", *result, new); 142 if (cp == NULL) 143 return -ENOMEM; 144 kfree(*result); 145 *result = cp; 146 } 147 return 0; 148 } 149 150 /** 151 * security_module_enable - Load given security module on boot ? 152 * @module: the name of the module 153 * 154 * Each LSM must pass this method before registering its own operations 155 * to avoid security registration races. This method may also be used 156 * to check if your LSM is currently loaded during kernel initialization. 157 * 158 * Returns: 159 * 160 * true if: 161 * 162 * - The passed LSM is the one chosen by user at boot time, 163 * - or the passed LSM is configured as the default and the user did not 164 * choose an alternate LSM at boot time. 165 * 166 * Otherwise, return false. 167 */ 168 int __init security_module_enable(const char *module) 169 { 170 return !strcmp(module, chosen_lsm); 171 } 172 173 /** 174 * security_add_hooks - Add a modules hooks to the hook lists. 175 * @hooks: the hooks to add 176 * @count: the number of hooks to add 177 * @lsm: the name of the security module 178 * 179 * Each LSM has to register its hooks with the infrastructure. 180 */ 181 void __init security_add_hooks(struct security_hook_list *hooks, int count, 182 char *lsm) 183 { 184 int i; 185 186 for (i = 0; i < count; i++) { 187 hooks[i].lsm = lsm; 188 hlist_add_tail_rcu(&hooks[i].list, hooks[i].head); 189 } 190 if (lsm_append(lsm, &lsm_names) < 0) 191 panic("%s - Cannot get early memory.\n", __func__); 192 } 193 194 int call_lsm_notifier(enum lsm_event event, void *data) 195 { 196 return atomic_notifier_call_chain(&lsm_notifier_chain, event, data); 197 } 198 EXPORT_SYMBOL(call_lsm_notifier); 199 200 int register_lsm_notifier(struct notifier_block *nb) 201 { 202 return atomic_notifier_chain_register(&lsm_notifier_chain, nb); 203 } 204 EXPORT_SYMBOL(register_lsm_notifier); 205 206 int unregister_lsm_notifier(struct notifier_block *nb) 207 { 208 return atomic_notifier_chain_unregister(&lsm_notifier_chain, nb); 209 } 210 EXPORT_SYMBOL(unregister_lsm_notifier); 211 212 /* 213 * Hook list operation macros. 214 * 215 * call_void_hook: 216 * This is a hook that does not return a value. 217 * 218 * call_int_hook: 219 * This is a hook that returns a value. 220 */ 221 222 #define call_void_hook(FUNC, ...) \ 223 do { \ 224 struct security_hook_list *P; \ 225 \ 226 hlist_for_each_entry(P, &security_hook_heads.FUNC, list) \ 227 P->hook.FUNC(__VA_ARGS__); \ 228 } while (0) 229 230 #define call_int_hook(FUNC, IRC, ...) ({ \ 231 int RC = IRC; \ 232 do { \ 233 struct security_hook_list *P; \ 234 \ 235 hlist_for_each_entry(P, &security_hook_heads.FUNC, list) { \ 236 RC = P->hook.FUNC(__VA_ARGS__); \ 237 if (RC != 0) \ 238 break; \ 239 } \ 240 } while (0); \ 241 RC; \ 242 }) 243 244 /* Security operations */ 245 246 int security_binder_set_context_mgr(struct task_struct *mgr) 247 { 248 return call_int_hook(binder_set_context_mgr, 0, mgr); 249 } 250 251 int security_binder_transaction(struct task_struct *from, 252 struct task_struct *to) 253 { 254 return call_int_hook(binder_transaction, 0, from, to); 255 } 256 257 int security_binder_transfer_binder(struct task_struct *from, 258 struct task_struct *to) 259 { 260 return call_int_hook(binder_transfer_binder, 0, from, to); 261 } 262 263 int security_binder_transfer_file(struct task_struct *from, 264 struct task_struct *to, struct file *file) 265 { 266 return call_int_hook(binder_transfer_file, 0, from, to, file); 267 } 268 269 int security_ptrace_access_check(struct task_struct *child, unsigned int mode) 270 { 271 return call_int_hook(ptrace_access_check, 0, child, mode); 272 } 273 274 int security_ptrace_traceme(struct task_struct *parent) 275 { 276 return call_int_hook(ptrace_traceme, 0, parent); 277 } 278 279 int security_capget(struct task_struct *target, 280 kernel_cap_t *effective, 281 kernel_cap_t *inheritable, 282 kernel_cap_t *permitted) 283 { 284 return call_int_hook(capget, 0, target, 285 effective, inheritable, permitted); 286 } 287 288 int security_capset(struct cred *new, const struct cred *old, 289 const kernel_cap_t *effective, 290 const kernel_cap_t *inheritable, 291 const kernel_cap_t *permitted) 292 { 293 return call_int_hook(capset, 0, new, old, 294 effective, inheritable, permitted); 295 } 296 297 int security_capable(const struct cred *cred, struct user_namespace *ns, 298 int cap) 299 { 300 return call_int_hook(capable, 0, cred, ns, cap, SECURITY_CAP_AUDIT); 301 } 302 303 int security_capable_noaudit(const struct cred *cred, struct user_namespace *ns, 304 int cap) 305 { 306 return call_int_hook(capable, 0, cred, ns, cap, SECURITY_CAP_NOAUDIT); 307 } 308 309 int security_quotactl(int cmds, int type, int id, struct super_block *sb) 310 { 311 return call_int_hook(quotactl, 0, cmds, type, id, sb); 312 } 313 314 int security_quota_on(struct dentry *dentry) 315 { 316 return call_int_hook(quota_on, 0, dentry); 317 } 318 319 int security_syslog(int type) 320 { 321 return call_int_hook(syslog, 0, type); 322 } 323 324 int security_settime64(const struct timespec64 *ts, const struct timezone *tz) 325 { 326 return call_int_hook(settime, 0, ts, tz); 327 } 328 329 int security_vm_enough_memory_mm(struct mm_struct *mm, long pages) 330 { 331 struct security_hook_list *hp; 332 int cap_sys_admin = 1; 333 int rc; 334 335 /* 336 * The module will respond with a positive value if 337 * it thinks the __vm_enough_memory() call should be 338 * made with the cap_sys_admin set. If all of the modules 339 * agree that it should be set it will. If any module 340 * thinks it should not be set it won't. 341 */ 342 hlist_for_each_entry(hp, &security_hook_heads.vm_enough_memory, list) { 343 rc = hp->hook.vm_enough_memory(mm, pages); 344 if (rc <= 0) { 345 cap_sys_admin = 0; 346 break; 347 } 348 } 349 return __vm_enough_memory(mm, pages, cap_sys_admin); 350 } 351 352 int security_bprm_set_creds(struct linux_binprm *bprm) 353 { 354 return call_int_hook(bprm_set_creds, 0, bprm); 355 } 356 357 int security_bprm_check(struct linux_binprm *bprm) 358 { 359 int ret; 360 361 ret = call_int_hook(bprm_check_security, 0, bprm); 362 if (ret) 363 return ret; 364 return ima_bprm_check(bprm); 365 } 366 367 void security_bprm_committing_creds(struct linux_binprm *bprm) 368 { 369 call_void_hook(bprm_committing_creds, bprm); 370 } 371 372 void security_bprm_committed_creds(struct linux_binprm *bprm) 373 { 374 call_void_hook(bprm_committed_creds, bprm); 375 } 376 377 int security_sb_alloc(struct super_block *sb) 378 { 379 return call_int_hook(sb_alloc_security, 0, sb); 380 } 381 382 void security_sb_free(struct super_block *sb) 383 { 384 call_void_hook(sb_free_security, sb); 385 } 386 387 int security_sb_copy_data(char *orig, char *copy) 388 { 389 return call_int_hook(sb_copy_data, 0, orig, copy); 390 } 391 EXPORT_SYMBOL(security_sb_copy_data); 392 393 int security_sb_remount(struct super_block *sb, void *data) 394 { 395 return call_int_hook(sb_remount, 0, sb, data); 396 } 397 398 int security_sb_kern_mount(struct super_block *sb, int flags, 399 struct security_mnt_opts *opts) 400 { 401 return call_int_hook(sb_kern_mount, 0, sb, flags, opts); 402 } 403 404 int security_sb_show_options(struct seq_file *m, struct super_block *sb) 405 { 406 return call_int_hook(sb_show_options, 0, m, sb); 407 } 408 409 int security_sb_statfs(struct dentry *dentry) 410 { 411 return call_int_hook(sb_statfs, 0, dentry); 412 } 413 414 int security_sb_mount(const char *dev_name, const struct path *path, 415 const char *type, unsigned long flags, void *data) 416 { 417 return call_int_hook(sb_mount, 0, dev_name, path, type, flags, data); 418 } 419 420 int security_sb_umount(struct vfsmount *mnt, int flags) 421 { 422 return call_int_hook(sb_umount, 0, mnt, flags); 423 } 424 425 int security_sb_pivotroot(const struct path *old_path, const struct path *new_path) 426 { 427 return call_int_hook(sb_pivotroot, 0, old_path, new_path); 428 } 429 430 int security_sb_set_mnt_opts(struct super_block *sb, 431 struct security_mnt_opts *opts, 432 unsigned long kern_flags, 433 unsigned long *set_kern_flags) 434 { 435 return call_int_hook(sb_set_mnt_opts, 436 opts->num_mnt_opts ? -EOPNOTSUPP : 0, sb, 437 opts, kern_flags, set_kern_flags); 438 } 439 EXPORT_SYMBOL(security_sb_set_mnt_opts); 440 441 int security_sb_clone_mnt_opts(const struct super_block *oldsb, 442 struct super_block *newsb, 443 unsigned long kern_flags, 444 unsigned long *set_kern_flags) 445 { 446 return call_int_hook(sb_clone_mnt_opts, 0, oldsb, newsb, 447 kern_flags, set_kern_flags); 448 } 449 EXPORT_SYMBOL(security_sb_clone_mnt_opts); 450 451 int security_sb_parse_opts_str(char *options, struct security_mnt_opts *opts) 452 { 453 return call_int_hook(sb_parse_opts_str, 0, options, opts); 454 } 455 EXPORT_SYMBOL(security_sb_parse_opts_str); 456 457 int security_inode_alloc(struct inode *inode) 458 { 459 inode->i_security = NULL; 460 return call_int_hook(inode_alloc_security, 0, inode); 461 } 462 463 void security_inode_free(struct inode *inode) 464 { 465 integrity_inode_free(inode); 466 call_void_hook(inode_free_security, inode); 467 } 468 469 int security_dentry_init_security(struct dentry *dentry, int mode, 470 const struct qstr *name, void **ctx, 471 u32 *ctxlen) 472 { 473 return call_int_hook(dentry_init_security, -EOPNOTSUPP, dentry, mode, 474 name, ctx, ctxlen); 475 } 476 EXPORT_SYMBOL(security_dentry_init_security); 477 478 int security_dentry_create_files_as(struct dentry *dentry, int mode, 479 struct qstr *name, 480 const struct cred *old, struct cred *new) 481 { 482 return call_int_hook(dentry_create_files_as, 0, dentry, mode, 483 name, old, new); 484 } 485 EXPORT_SYMBOL(security_dentry_create_files_as); 486 487 int security_inode_init_security(struct inode *inode, struct inode *dir, 488 const struct qstr *qstr, 489 const initxattrs initxattrs, void *fs_data) 490 { 491 struct xattr new_xattrs[MAX_LSM_EVM_XATTR + 1]; 492 struct xattr *lsm_xattr, *evm_xattr, *xattr; 493 int ret; 494 495 if (unlikely(IS_PRIVATE(inode))) 496 return 0; 497 498 if (!initxattrs) 499 return call_int_hook(inode_init_security, -EOPNOTSUPP, inode, 500 dir, qstr, NULL, NULL, NULL); 501 memset(new_xattrs, 0, sizeof(new_xattrs)); 502 lsm_xattr = new_xattrs; 503 ret = call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir, qstr, 504 &lsm_xattr->name, 505 &lsm_xattr->value, 506 &lsm_xattr->value_len); 507 if (ret) 508 goto out; 509 510 evm_xattr = lsm_xattr + 1; 511 ret = evm_inode_init_security(inode, lsm_xattr, evm_xattr); 512 if (ret) 513 goto out; 514 ret = initxattrs(inode, new_xattrs, fs_data); 515 out: 516 for (xattr = new_xattrs; xattr->value != NULL; xattr++) 517 kfree(xattr->value); 518 return (ret == -EOPNOTSUPP) ? 0 : ret; 519 } 520 EXPORT_SYMBOL(security_inode_init_security); 521 522 int security_old_inode_init_security(struct inode *inode, struct inode *dir, 523 const struct qstr *qstr, const char **name, 524 void **value, size_t *len) 525 { 526 if (unlikely(IS_PRIVATE(inode))) 527 return -EOPNOTSUPP; 528 return call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir, 529 qstr, name, value, len); 530 } 531 EXPORT_SYMBOL(security_old_inode_init_security); 532 533 #ifdef CONFIG_SECURITY_PATH 534 int security_path_mknod(const struct path *dir, struct dentry *dentry, umode_t mode, 535 unsigned int dev) 536 { 537 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) 538 return 0; 539 return call_int_hook(path_mknod, 0, dir, dentry, mode, dev); 540 } 541 EXPORT_SYMBOL(security_path_mknod); 542 543 int security_path_mkdir(const struct path *dir, struct dentry *dentry, umode_t mode) 544 { 545 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) 546 return 0; 547 return call_int_hook(path_mkdir, 0, dir, dentry, mode); 548 } 549 EXPORT_SYMBOL(security_path_mkdir); 550 551 int security_path_rmdir(const struct path *dir, struct dentry *dentry) 552 { 553 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) 554 return 0; 555 return call_int_hook(path_rmdir, 0, dir, dentry); 556 } 557 558 int security_path_unlink(const struct path *dir, struct dentry *dentry) 559 { 560 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) 561 return 0; 562 return call_int_hook(path_unlink, 0, dir, dentry); 563 } 564 EXPORT_SYMBOL(security_path_unlink); 565 566 int security_path_symlink(const struct path *dir, struct dentry *dentry, 567 const char *old_name) 568 { 569 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) 570 return 0; 571 return call_int_hook(path_symlink, 0, dir, dentry, old_name); 572 } 573 574 int security_path_link(struct dentry *old_dentry, const struct path *new_dir, 575 struct dentry *new_dentry) 576 { 577 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)))) 578 return 0; 579 return call_int_hook(path_link, 0, old_dentry, new_dir, new_dentry); 580 } 581 582 int security_path_rename(const struct path *old_dir, struct dentry *old_dentry, 583 const struct path *new_dir, struct dentry *new_dentry, 584 unsigned int flags) 585 { 586 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) || 587 (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry))))) 588 return 0; 589 590 if (flags & RENAME_EXCHANGE) { 591 int err = call_int_hook(path_rename, 0, new_dir, new_dentry, 592 old_dir, old_dentry); 593 if (err) 594 return err; 595 } 596 597 return call_int_hook(path_rename, 0, old_dir, old_dentry, new_dir, 598 new_dentry); 599 } 600 EXPORT_SYMBOL(security_path_rename); 601 602 int security_path_truncate(const struct path *path) 603 { 604 if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry)))) 605 return 0; 606 return call_int_hook(path_truncate, 0, path); 607 } 608 609 int security_path_chmod(const struct path *path, umode_t mode) 610 { 611 if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry)))) 612 return 0; 613 return call_int_hook(path_chmod, 0, path, mode); 614 } 615 616 int security_path_chown(const struct path *path, kuid_t uid, kgid_t gid) 617 { 618 if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry)))) 619 return 0; 620 return call_int_hook(path_chown, 0, path, uid, gid); 621 } 622 623 int security_path_chroot(const struct path *path) 624 { 625 return call_int_hook(path_chroot, 0, path); 626 } 627 #endif 628 629 int security_inode_create(struct inode *dir, struct dentry *dentry, umode_t mode) 630 { 631 if (unlikely(IS_PRIVATE(dir))) 632 return 0; 633 return call_int_hook(inode_create, 0, dir, dentry, mode); 634 } 635 EXPORT_SYMBOL_GPL(security_inode_create); 636 637 int security_inode_link(struct dentry *old_dentry, struct inode *dir, 638 struct dentry *new_dentry) 639 { 640 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)))) 641 return 0; 642 return call_int_hook(inode_link, 0, old_dentry, dir, new_dentry); 643 } 644 645 int security_inode_unlink(struct inode *dir, struct dentry *dentry) 646 { 647 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 648 return 0; 649 return call_int_hook(inode_unlink, 0, dir, dentry); 650 } 651 652 int security_inode_symlink(struct inode *dir, struct dentry *dentry, 653 const char *old_name) 654 { 655 if (unlikely(IS_PRIVATE(dir))) 656 return 0; 657 return call_int_hook(inode_symlink, 0, dir, dentry, old_name); 658 } 659 660 int security_inode_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) 661 { 662 if (unlikely(IS_PRIVATE(dir))) 663 return 0; 664 return call_int_hook(inode_mkdir, 0, dir, dentry, mode); 665 } 666 EXPORT_SYMBOL_GPL(security_inode_mkdir); 667 668 int security_inode_rmdir(struct inode *dir, struct dentry *dentry) 669 { 670 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 671 return 0; 672 return call_int_hook(inode_rmdir, 0, dir, dentry); 673 } 674 675 int security_inode_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t dev) 676 { 677 if (unlikely(IS_PRIVATE(dir))) 678 return 0; 679 return call_int_hook(inode_mknod, 0, dir, dentry, mode, dev); 680 } 681 682 int security_inode_rename(struct inode *old_dir, struct dentry *old_dentry, 683 struct inode *new_dir, struct dentry *new_dentry, 684 unsigned int flags) 685 { 686 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) || 687 (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry))))) 688 return 0; 689 690 if (flags & RENAME_EXCHANGE) { 691 int err = call_int_hook(inode_rename, 0, new_dir, new_dentry, 692 old_dir, old_dentry); 693 if (err) 694 return err; 695 } 696 697 return call_int_hook(inode_rename, 0, old_dir, old_dentry, 698 new_dir, new_dentry); 699 } 700 701 int security_inode_readlink(struct dentry *dentry) 702 { 703 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 704 return 0; 705 return call_int_hook(inode_readlink, 0, dentry); 706 } 707 708 int security_inode_follow_link(struct dentry *dentry, struct inode *inode, 709 bool rcu) 710 { 711 if (unlikely(IS_PRIVATE(inode))) 712 return 0; 713 return call_int_hook(inode_follow_link, 0, dentry, inode, rcu); 714 } 715 716 int security_inode_permission(struct inode *inode, int mask) 717 { 718 if (unlikely(IS_PRIVATE(inode))) 719 return 0; 720 return call_int_hook(inode_permission, 0, inode, mask); 721 } 722 723 int security_inode_setattr(struct dentry *dentry, struct iattr *attr) 724 { 725 int ret; 726 727 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 728 return 0; 729 ret = call_int_hook(inode_setattr, 0, dentry, attr); 730 if (ret) 731 return ret; 732 return evm_inode_setattr(dentry, attr); 733 } 734 EXPORT_SYMBOL_GPL(security_inode_setattr); 735 736 int security_inode_getattr(const struct path *path) 737 { 738 if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry)))) 739 return 0; 740 return call_int_hook(inode_getattr, 0, path); 741 } 742 743 int security_inode_setxattr(struct dentry *dentry, const char *name, 744 const void *value, size_t size, int flags) 745 { 746 int ret; 747 748 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 749 return 0; 750 /* 751 * SELinux and Smack integrate the cap call, 752 * so assume that all LSMs supplying this call do so. 753 */ 754 ret = call_int_hook(inode_setxattr, 1, dentry, name, value, size, 755 flags); 756 757 if (ret == 1) 758 ret = cap_inode_setxattr(dentry, name, value, size, flags); 759 if (ret) 760 return ret; 761 ret = ima_inode_setxattr(dentry, name, value, size); 762 if (ret) 763 return ret; 764 return evm_inode_setxattr(dentry, name, value, size); 765 } 766 767 void security_inode_post_setxattr(struct dentry *dentry, const char *name, 768 const void *value, size_t size, int flags) 769 { 770 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 771 return; 772 call_void_hook(inode_post_setxattr, dentry, name, value, size, flags); 773 evm_inode_post_setxattr(dentry, name, value, size); 774 } 775 776 int security_inode_getxattr(struct dentry *dentry, const char *name) 777 { 778 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 779 return 0; 780 return call_int_hook(inode_getxattr, 0, dentry, name); 781 } 782 783 int security_inode_listxattr(struct dentry *dentry) 784 { 785 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 786 return 0; 787 return call_int_hook(inode_listxattr, 0, dentry); 788 } 789 790 int security_inode_removexattr(struct dentry *dentry, const char *name) 791 { 792 int ret; 793 794 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 795 return 0; 796 /* 797 * SELinux and Smack integrate the cap call, 798 * so assume that all LSMs supplying this call do so. 799 */ 800 ret = call_int_hook(inode_removexattr, 1, dentry, name); 801 if (ret == 1) 802 ret = cap_inode_removexattr(dentry, name); 803 if (ret) 804 return ret; 805 ret = ima_inode_removexattr(dentry, name); 806 if (ret) 807 return ret; 808 return evm_inode_removexattr(dentry, name); 809 } 810 811 int security_inode_need_killpriv(struct dentry *dentry) 812 { 813 return call_int_hook(inode_need_killpriv, 0, dentry); 814 } 815 816 int security_inode_killpriv(struct dentry *dentry) 817 { 818 return call_int_hook(inode_killpriv, 0, dentry); 819 } 820 821 int security_inode_getsecurity(struct inode *inode, const char *name, void **buffer, bool alloc) 822 { 823 struct security_hook_list *hp; 824 int rc; 825 826 if (unlikely(IS_PRIVATE(inode))) 827 return -EOPNOTSUPP; 828 /* 829 * Only one module will provide an attribute with a given name. 830 */ 831 hlist_for_each_entry(hp, &security_hook_heads.inode_getsecurity, list) { 832 rc = hp->hook.inode_getsecurity(inode, name, buffer, alloc); 833 if (rc != -EOPNOTSUPP) 834 return rc; 835 } 836 return -EOPNOTSUPP; 837 } 838 839 int security_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags) 840 { 841 struct security_hook_list *hp; 842 int rc; 843 844 if (unlikely(IS_PRIVATE(inode))) 845 return -EOPNOTSUPP; 846 /* 847 * Only one module will provide an attribute with a given name. 848 */ 849 hlist_for_each_entry(hp, &security_hook_heads.inode_setsecurity, list) { 850 rc = hp->hook.inode_setsecurity(inode, name, value, size, 851 flags); 852 if (rc != -EOPNOTSUPP) 853 return rc; 854 } 855 return -EOPNOTSUPP; 856 } 857 858 int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size) 859 { 860 if (unlikely(IS_PRIVATE(inode))) 861 return 0; 862 return call_int_hook(inode_listsecurity, 0, inode, buffer, buffer_size); 863 } 864 EXPORT_SYMBOL(security_inode_listsecurity); 865 866 void security_inode_getsecid(struct inode *inode, u32 *secid) 867 { 868 call_void_hook(inode_getsecid, inode, secid); 869 } 870 871 int security_inode_copy_up(struct dentry *src, struct cred **new) 872 { 873 return call_int_hook(inode_copy_up, 0, src, new); 874 } 875 EXPORT_SYMBOL(security_inode_copy_up); 876 877 int security_inode_copy_up_xattr(const char *name) 878 { 879 return call_int_hook(inode_copy_up_xattr, -EOPNOTSUPP, name); 880 } 881 EXPORT_SYMBOL(security_inode_copy_up_xattr); 882 883 int security_file_permission(struct file *file, int mask) 884 { 885 int ret; 886 887 ret = call_int_hook(file_permission, 0, file, mask); 888 if (ret) 889 return ret; 890 891 return fsnotify_perm(file, mask); 892 } 893 894 int security_file_alloc(struct file *file) 895 { 896 return call_int_hook(file_alloc_security, 0, file); 897 } 898 899 void security_file_free(struct file *file) 900 { 901 call_void_hook(file_free_security, file); 902 } 903 904 int security_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 905 { 906 return call_int_hook(file_ioctl, 0, file, cmd, arg); 907 } 908 909 static inline unsigned long mmap_prot(struct file *file, unsigned long prot) 910 { 911 /* 912 * Does we have PROT_READ and does the application expect 913 * it to imply PROT_EXEC? If not, nothing to talk about... 914 */ 915 if ((prot & (PROT_READ | PROT_EXEC)) != PROT_READ) 916 return prot; 917 if (!(current->personality & READ_IMPLIES_EXEC)) 918 return prot; 919 /* 920 * if that's an anonymous mapping, let it. 921 */ 922 if (!file) 923 return prot | PROT_EXEC; 924 /* 925 * ditto if it's not on noexec mount, except that on !MMU we need 926 * NOMMU_MAP_EXEC (== VM_MAYEXEC) in this case 927 */ 928 if (!path_noexec(&file->f_path)) { 929 #ifndef CONFIG_MMU 930 if (file->f_op->mmap_capabilities) { 931 unsigned caps = file->f_op->mmap_capabilities(file); 932 if (!(caps & NOMMU_MAP_EXEC)) 933 return prot; 934 } 935 #endif 936 return prot | PROT_EXEC; 937 } 938 /* anything on noexec mount won't get PROT_EXEC */ 939 return prot; 940 } 941 942 int security_mmap_file(struct file *file, unsigned long prot, 943 unsigned long flags) 944 { 945 int ret; 946 ret = call_int_hook(mmap_file, 0, file, prot, 947 mmap_prot(file, prot), flags); 948 if (ret) 949 return ret; 950 return ima_file_mmap(file, prot); 951 } 952 953 int security_mmap_addr(unsigned long addr) 954 { 955 return call_int_hook(mmap_addr, 0, addr); 956 } 957 958 int security_file_mprotect(struct vm_area_struct *vma, unsigned long reqprot, 959 unsigned long prot) 960 { 961 return call_int_hook(file_mprotect, 0, vma, reqprot, prot); 962 } 963 964 int security_file_lock(struct file *file, unsigned int cmd) 965 { 966 return call_int_hook(file_lock, 0, file, cmd); 967 } 968 969 int security_file_fcntl(struct file *file, unsigned int cmd, unsigned long arg) 970 { 971 return call_int_hook(file_fcntl, 0, file, cmd, arg); 972 } 973 974 void security_file_set_fowner(struct file *file) 975 { 976 call_void_hook(file_set_fowner, file); 977 } 978 979 int security_file_send_sigiotask(struct task_struct *tsk, 980 struct fown_struct *fown, int sig) 981 { 982 return call_int_hook(file_send_sigiotask, 0, tsk, fown, sig); 983 } 984 985 int security_file_receive(struct file *file) 986 { 987 return call_int_hook(file_receive, 0, file); 988 } 989 990 int security_file_open(struct file *file) 991 { 992 int ret; 993 994 ret = call_int_hook(file_open, 0, file); 995 if (ret) 996 return ret; 997 998 return fsnotify_perm(file, MAY_OPEN); 999 } 1000 1001 int security_task_alloc(struct task_struct *task, unsigned long clone_flags) 1002 { 1003 return call_int_hook(task_alloc, 0, task, clone_flags); 1004 } 1005 1006 void security_task_free(struct task_struct *task) 1007 { 1008 call_void_hook(task_free, task); 1009 } 1010 1011 int security_cred_alloc_blank(struct cred *cred, gfp_t gfp) 1012 { 1013 return call_int_hook(cred_alloc_blank, 0, cred, gfp); 1014 } 1015 1016 void security_cred_free(struct cred *cred) 1017 { 1018 call_void_hook(cred_free, cred); 1019 } 1020 1021 int security_prepare_creds(struct cred *new, const struct cred *old, gfp_t gfp) 1022 { 1023 return call_int_hook(cred_prepare, 0, new, old, gfp); 1024 } 1025 1026 void security_transfer_creds(struct cred *new, const struct cred *old) 1027 { 1028 call_void_hook(cred_transfer, new, old); 1029 } 1030 1031 void security_cred_getsecid(const struct cred *c, u32 *secid) 1032 { 1033 *secid = 0; 1034 call_void_hook(cred_getsecid, c, secid); 1035 } 1036 EXPORT_SYMBOL(security_cred_getsecid); 1037 1038 int security_kernel_act_as(struct cred *new, u32 secid) 1039 { 1040 return call_int_hook(kernel_act_as, 0, new, secid); 1041 } 1042 1043 int security_kernel_create_files_as(struct cred *new, struct inode *inode) 1044 { 1045 return call_int_hook(kernel_create_files_as, 0, new, inode); 1046 } 1047 1048 int security_kernel_module_request(char *kmod_name) 1049 { 1050 int ret; 1051 1052 ret = call_int_hook(kernel_module_request, 0, kmod_name); 1053 if (ret) 1054 return ret; 1055 return integrity_kernel_module_request(kmod_name); 1056 } 1057 1058 int security_kernel_read_file(struct file *file, enum kernel_read_file_id id) 1059 { 1060 int ret; 1061 1062 ret = call_int_hook(kernel_read_file, 0, file, id); 1063 if (ret) 1064 return ret; 1065 return ima_read_file(file, id); 1066 } 1067 EXPORT_SYMBOL_GPL(security_kernel_read_file); 1068 1069 int security_kernel_post_read_file(struct file *file, char *buf, loff_t size, 1070 enum kernel_read_file_id id) 1071 { 1072 int ret; 1073 1074 ret = call_int_hook(kernel_post_read_file, 0, file, buf, size, id); 1075 if (ret) 1076 return ret; 1077 return ima_post_read_file(file, buf, size, id); 1078 } 1079 EXPORT_SYMBOL_GPL(security_kernel_post_read_file); 1080 1081 int security_kernel_load_data(enum kernel_load_data_id id) 1082 { 1083 int ret; 1084 1085 ret = call_int_hook(kernel_load_data, 0, id); 1086 if (ret) 1087 return ret; 1088 return ima_load_data(id); 1089 } 1090 EXPORT_SYMBOL_GPL(security_kernel_load_data); 1091 1092 int security_task_fix_setuid(struct cred *new, const struct cred *old, 1093 int flags) 1094 { 1095 return call_int_hook(task_fix_setuid, 0, new, old, flags); 1096 } 1097 1098 int security_task_setpgid(struct task_struct *p, pid_t pgid) 1099 { 1100 return call_int_hook(task_setpgid, 0, p, pgid); 1101 } 1102 1103 int security_task_getpgid(struct task_struct *p) 1104 { 1105 return call_int_hook(task_getpgid, 0, p); 1106 } 1107 1108 int security_task_getsid(struct task_struct *p) 1109 { 1110 return call_int_hook(task_getsid, 0, p); 1111 } 1112 1113 void security_task_getsecid(struct task_struct *p, u32 *secid) 1114 { 1115 *secid = 0; 1116 call_void_hook(task_getsecid, p, secid); 1117 } 1118 EXPORT_SYMBOL(security_task_getsecid); 1119 1120 int security_task_setnice(struct task_struct *p, int nice) 1121 { 1122 return call_int_hook(task_setnice, 0, p, nice); 1123 } 1124 1125 int security_task_setioprio(struct task_struct *p, int ioprio) 1126 { 1127 return call_int_hook(task_setioprio, 0, p, ioprio); 1128 } 1129 1130 int security_task_getioprio(struct task_struct *p) 1131 { 1132 return call_int_hook(task_getioprio, 0, p); 1133 } 1134 1135 int security_task_prlimit(const struct cred *cred, const struct cred *tcred, 1136 unsigned int flags) 1137 { 1138 return call_int_hook(task_prlimit, 0, cred, tcred, flags); 1139 } 1140 1141 int security_task_setrlimit(struct task_struct *p, unsigned int resource, 1142 struct rlimit *new_rlim) 1143 { 1144 return call_int_hook(task_setrlimit, 0, p, resource, new_rlim); 1145 } 1146 1147 int security_task_setscheduler(struct task_struct *p) 1148 { 1149 return call_int_hook(task_setscheduler, 0, p); 1150 } 1151 1152 int security_task_getscheduler(struct task_struct *p) 1153 { 1154 return call_int_hook(task_getscheduler, 0, p); 1155 } 1156 1157 int security_task_movememory(struct task_struct *p) 1158 { 1159 return call_int_hook(task_movememory, 0, p); 1160 } 1161 1162 int security_task_kill(struct task_struct *p, struct kernel_siginfo *info, 1163 int sig, const struct cred *cred) 1164 { 1165 return call_int_hook(task_kill, 0, p, info, sig, cred); 1166 } 1167 1168 int security_task_prctl(int option, unsigned long arg2, unsigned long arg3, 1169 unsigned long arg4, unsigned long arg5) 1170 { 1171 int thisrc; 1172 int rc = -ENOSYS; 1173 struct security_hook_list *hp; 1174 1175 hlist_for_each_entry(hp, &security_hook_heads.task_prctl, list) { 1176 thisrc = hp->hook.task_prctl(option, arg2, arg3, arg4, arg5); 1177 if (thisrc != -ENOSYS) { 1178 rc = thisrc; 1179 if (thisrc != 0) 1180 break; 1181 } 1182 } 1183 return rc; 1184 } 1185 1186 void security_task_to_inode(struct task_struct *p, struct inode *inode) 1187 { 1188 call_void_hook(task_to_inode, p, inode); 1189 } 1190 1191 int security_ipc_permission(struct kern_ipc_perm *ipcp, short flag) 1192 { 1193 return call_int_hook(ipc_permission, 0, ipcp, flag); 1194 } 1195 1196 void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid) 1197 { 1198 *secid = 0; 1199 call_void_hook(ipc_getsecid, ipcp, secid); 1200 } 1201 1202 int security_msg_msg_alloc(struct msg_msg *msg) 1203 { 1204 return call_int_hook(msg_msg_alloc_security, 0, msg); 1205 } 1206 1207 void security_msg_msg_free(struct msg_msg *msg) 1208 { 1209 call_void_hook(msg_msg_free_security, msg); 1210 } 1211 1212 int security_msg_queue_alloc(struct kern_ipc_perm *msq) 1213 { 1214 return call_int_hook(msg_queue_alloc_security, 0, msq); 1215 } 1216 1217 void security_msg_queue_free(struct kern_ipc_perm *msq) 1218 { 1219 call_void_hook(msg_queue_free_security, msq); 1220 } 1221 1222 int security_msg_queue_associate(struct kern_ipc_perm *msq, int msqflg) 1223 { 1224 return call_int_hook(msg_queue_associate, 0, msq, msqflg); 1225 } 1226 1227 int security_msg_queue_msgctl(struct kern_ipc_perm *msq, int cmd) 1228 { 1229 return call_int_hook(msg_queue_msgctl, 0, msq, cmd); 1230 } 1231 1232 int security_msg_queue_msgsnd(struct kern_ipc_perm *msq, 1233 struct msg_msg *msg, int msqflg) 1234 { 1235 return call_int_hook(msg_queue_msgsnd, 0, msq, msg, msqflg); 1236 } 1237 1238 int security_msg_queue_msgrcv(struct kern_ipc_perm *msq, struct msg_msg *msg, 1239 struct task_struct *target, long type, int mode) 1240 { 1241 return call_int_hook(msg_queue_msgrcv, 0, msq, msg, target, type, mode); 1242 } 1243 1244 int security_shm_alloc(struct kern_ipc_perm *shp) 1245 { 1246 return call_int_hook(shm_alloc_security, 0, shp); 1247 } 1248 1249 void security_shm_free(struct kern_ipc_perm *shp) 1250 { 1251 call_void_hook(shm_free_security, shp); 1252 } 1253 1254 int security_shm_associate(struct kern_ipc_perm *shp, int shmflg) 1255 { 1256 return call_int_hook(shm_associate, 0, shp, shmflg); 1257 } 1258 1259 int security_shm_shmctl(struct kern_ipc_perm *shp, int cmd) 1260 { 1261 return call_int_hook(shm_shmctl, 0, shp, cmd); 1262 } 1263 1264 int security_shm_shmat(struct kern_ipc_perm *shp, char __user *shmaddr, int shmflg) 1265 { 1266 return call_int_hook(shm_shmat, 0, shp, shmaddr, shmflg); 1267 } 1268 1269 int security_sem_alloc(struct kern_ipc_perm *sma) 1270 { 1271 return call_int_hook(sem_alloc_security, 0, sma); 1272 } 1273 1274 void security_sem_free(struct kern_ipc_perm *sma) 1275 { 1276 call_void_hook(sem_free_security, sma); 1277 } 1278 1279 int security_sem_associate(struct kern_ipc_perm *sma, int semflg) 1280 { 1281 return call_int_hook(sem_associate, 0, sma, semflg); 1282 } 1283 1284 int security_sem_semctl(struct kern_ipc_perm *sma, int cmd) 1285 { 1286 return call_int_hook(sem_semctl, 0, sma, cmd); 1287 } 1288 1289 int security_sem_semop(struct kern_ipc_perm *sma, struct sembuf *sops, 1290 unsigned nsops, int alter) 1291 { 1292 return call_int_hook(sem_semop, 0, sma, sops, nsops, alter); 1293 } 1294 1295 void security_d_instantiate(struct dentry *dentry, struct inode *inode) 1296 { 1297 if (unlikely(inode && IS_PRIVATE(inode))) 1298 return; 1299 call_void_hook(d_instantiate, dentry, inode); 1300 } 1301 EXPORT_SYMBOL(security_d_instantiate); 1302 1303 int security_getprocattr(struct task_struct *p, char *name, char **value) 1304 { 1305 return call_int_hook(getprocattr, -EINVAL, p, name, value); 1306 } 1307 1308 int security_setprocattr(const char *name, void *value, size_t size) 1309 { 1310 return call_int_hook(setprocattr, -EINVAL, name, value, size); 1311 } 1312 1313 int security_netlink_send(struct sock *sk, struct sk_buff *skb) 1314 { 1315 return call_int_hook(netlink_send, 0, sk, skb); 1316 } 1317 1318 int security_ismaclabel(const char *name) 1319 { 1320 return call_int_hook(ismaclabel, 0, name); 1321 } 1322 EXPORT_SYMBOL(security_ismaclabel); 1323 1324 int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen) 1325 { 1326 return call_int_hook(secid_to_secctx, -EOPNOTSUPP, secid, secdata, 1327 seclen); 1328 } 1329 EXPORT_SYMBOL(security_secid_to_secctx); 1330 1331 int security_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid) 1332 { 1333 *secid = 0; 1334 return call_int_hook(secctx_to_secid, 0, secdata, seclen, secid); 1335 } 1336 EXPORT_SYMBOL(security_secctx_to_secid); 1337 1338 void security_release_secctx(char *secdata, u32 seclen) 1339 { 1340 call_void_hook(release_secctx, secdata, seclen); 1341 } 1342 EXPORT_SYMBOL(security_release_secctx); 1343 1344 void security_inode_invalidate_secctx(struct inode *inode) 1345 { 1346 call_void_hook(inode_invalidate_secctx, inode); 1347 } 1348 EXPORT_SYMBOL(security_inode_invalidate_secctx); 1349 1350 int security_inode_notifysecctx(struct inode *inode, void *ctx, u32 ctxlen) 1351 { 1352 return call_int_hook(inode_notifysecctx, 0, inode, ctx, ctxlen); 1353 } 1354 EXPORT_SYMBOL(security_inode_notifysecctx); 1355 1356 int security_inode_setsecctx(struct dentry *dentry, void *ctx, u32 ctxlen) 1357 { 1358 return call_int_hook(inode_setsecctx, 0, dentry, ctx, ctxlen); 1359 } 1360 EXPORT_SYMBOL(security_inode_setsecctx); 1361 1362 int security_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen) 1363 { 1364 return call_int_hook(inode_getsecctx, -EOPNOTSUPP, inode, ctx, ctxlen); 1365 } 1366 EXPORT_SYMBOL(security_inode_getsecctx); 1367 1368 #ifdef CONFIG_SECURITY_NETWORK 1369 1370 int security_unix_stream_connect(struct sock *sock, struct sock *other, struct sock *newsk) 1371 { 1372 return call_int_hook(unix_stream_connect, 0, sock, other, newsk); 1373 } 1374 EXPORT_SYMBOL(security_unix_stream_connect); 1375 1376 int security_unix_may_send(struct socket *sock, struct socket *other) 1377 { 1378 return call_int_hook(unix_may_send, 0, sock, other); 1379 } 1380 EXPORT_SYMBOL(security_unix_may_send); 1381 1382 int security_socket_create(int family, int type, int protocol, int kern) 1383 { 1384 return call_int_hook(socket_create, 0, family, type, protocol, kern); 1385 } 1386 1387 int security_socket_post_create(struct socket *sock, int family, 1388 int type, int protocol, int kern) 1389 { 1390 return call_int_hook(socket_post_create, 0, sock, family, type, 1391 protocol, kern); 1392 } 1393 1394 int security_socket_socketpair(struct socket *socka, struct socket *sockb) 1395 { 1396 return call_int_hook(socket_socketpair, 0, socka, sockb); 1397 } 1398 EXPORT_SYMBOL(security_socket_socketpair); 1399 1400 int security_socket_bind(struct socket *sock, struct sockaddr *address, int addrlen) 1401 { 1402 return call_int_hook(socket_bind, 0, sock, address, addrlen); 1403 } 1404 1405 int security_socket_connect(struct socket *sock, struct sockaddr *address, int addrlen) 1406 { 1407 return call_int_hook(socket_connect, 0, sock, address, addrlen); 1408 } 1409 1410 int security_socket_listen(struct socket *sock, int backlog) 1411 { 1412 return call_int_hook(socket_listen, 0, sock, backlog); 1413 } 1414 1415 int security_socket_accept(struct socket *sock, struct socket *newsock) 1416 { 1417 return call_int_hook(socket_accept, 0, sock, newsock); 1418 } 1419 1420 int security_socket_sendmsg(struct socket *sock, struct msghdr *msg, int size) 1421 { 1422 return call_int_hook(socket_sendmsg, 0, sock, msg, size); 1423 } 1424 1425 int security_socket_recvmsg(struct socket *sock, struct msghdr *msg, 1426 int size, int flags) 1427 { 1428 return call_int_hook(socket_recvmsg, 0, sock, msg, size, flags); 1429 } 1430 1431 int security_socket_getsockname(struct socket *sock) 1432 { 1433 return call_int_hook(socket_getsockname, 0, sock); 1434 } 1435 1436 int security_socket_getpeername(struct socket *sock) 1437 { 1438 return call_int_hook(socket_getpeername, 0, sock); 1439 } 1440 1441 int security_socket_getsockopt(struct socket *sock, int level, int optname) 1442 { 1443 return call_int_hook(socket_getsockopt, 0, sock, level, optname); 1444 } 1445 1446 int security_socket_setsockopt(struct socket *sock, int level, int optname) 1447 { 1448 return call_int_hook(socket_setsockopt, 0, sock, level, optname); 1449 } 1450 1451 int security_socket_shutdown(struct socket *sock, int how) 1452 { 1453 return call_int_hook(socket_shutdown, 0, sock, how); 1454 } 1455 1456 int security_sock_rcv_skb(struct sock *sk, struct sk_buff *skb) 1457 { 1458 return call_int_hook(socket_sock_rcv_skb, 0, sk, skb); 1459 } 1460 EXPORT_SYMBOL(security_sock_rcv_skb); 1461 1462 int security_socket_getpeersec_stream(struct socket *sock, char __user *optval, 1463 int __user *optlen, unsigned len) 1464 { 1465 return call_int_hook(socket_getpeersec_stream, -ENOPROTOOPT, sock, 1466 optval, optlen, len); 1467 } 1468 1469 int security_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb, u32 *secid) 1470 { 1471 return call_int_hook(socket_getpeersec_dgram, -ENOPROTOOPT, sock, 1472 skb, secid); 1473 } 1474 EXPORT_SYMBOL(security_socket_getpeersec_dgram); 1475 1476 int security_sk_alloc(struct sock *sk, int family, gfp_t priority) 1477 { 1478 return call_int_hook(sk_alloc_security, 0, sk, family, priority); 1479 } 1480 1481 void security_sk_free(struct sock *sk) 1482 { 1483 call_void_hook(sk_free_security, sk); 1484 } 1485 1486 void security_sk_clone(const struct sock *sk, struct sock *newsk) 1487 { 1488 call_void_hook(sk_clone_security, sk, newsk); 1489 } 1490 EXPORT_SYMBOL(security_sk_clone); 1491 1492 void security_sk_classify_flow(struct sock *sk, struct flowi *fl) 1493 { 1494 call_void_hook(sk_getsecid, sk, &fl->flowi_secid); 1495 } 1496 EXPORT_SYMBOL(security_sk_classify_flow); 1497 1498 void security_req_classify_flow(const struct request_sock *req, struct flowi *fl) 1499 { 1500 call_void_hook(req_classify_flow, req, fl); 1501 } 1502 EXPORT_SYMBOL(security_req_classify_flow); 1503 1504 void security_sock_graft(struct sock *sk, struct socket *parent) 1505 { 1506 call_void_hook(sock_graft, sk, parent); 1507 } 1508 EXPORT_SYMBOL(security_sock_graft); 1509 1510 int security_inet_conn_request(struct sock *sk, 1511 struct sk_buff *skb, struct request_sock *req) 1512 { 1513 return call_int_hook(inet_conn_request, 0, sk, skb, req); 1514 } 1515 EXPORT_SYMBOL(security_inet_conn_request); 1516 1517 void security_inet_csk_clone(struct sock *newsk, 1518 const struct request_sock *req) 1519 { 1520 call_void_hook(inet_csk_clone, newsk, req); 1521 } 1522 1523 void security_inet_conn_established(struct sock *sk, 1524 struct sk_buff *skb) 1525 { 1526 call_void_hook(inet_conn_established, sk, skb); 1527 } 1528 EXPORT_SYMBOL(security_inet_conn_established); 1529 1530 int security_secmark_relabel_packet(u32 secid) 1531 { 1532 return call_int_hook(secmark_relabel_packet, 0, secid); 1533 } 1534 EXPORT_SYMBOL(security_secmark_relabel_packet); 1535 1536 void security_secmark_refcount_inc(void) 1537 { 1538 call_void_hook(secmark_refcount_inc); 1539 } 1540 EXPORT_SYMBOL(security_secmark_refcount_inc); 1541 1542 void security_secmark_refcount_dec(void) 1543 { 1544 call_void_hook(secmark_refcount_dec); 1545 } 1546 EXPORT_SYMBOL(security_secmark_refcount_dec); 1547 1548 int security_tun_dev_alloc_security(void **security) 1549 { 1550 return call_int_hook(tun_dev_alloc_security, 0, security); 1551 } 1552 EXPORT_SYMBOL(security_tun_dev_alloc_security); 1553 1554 void security_tun_dev_free_security(void *security) 1555 { 1556 call_void_hook(tun_dev_free_security, security); 1557 } 1558 EXPORT_SYMBOL(security_tun_dev_free_security); 1559 1560 int security_tun_dev_create(void) 1561 { 1562 return call_int_hook(tun_dev_create, 0); 1563 } 1564 EXPORT_SYMBOL(security_tun_dev_create); 1565 1566 int security_tun_dev_attach_queue(void *security) 1567 { 1568 return call_int_hook(tun_dev_attach_queue, 0, security); 1569 } 1570 EXPORT_SYMBOL(security_tun_dev_attach_queue); 1571 1572 int security_tun_dev_attach(struct sock *sk, void *security) 1573 { 1574 return call_int_hook(tun_dev_attach, 0, sk, security); 1575 } 1576 EXPORT_SYMBOL(security_tun_dev_attach); 1577 1578 int security_tun_dev_open(void *security) 1579 { 1580 return call_int_hook(tun_dev_open, 0, security); 1581 } 1582 EXPORT_SYMBOL(security_tun_dev_open); 1583 1584 int security_sctp_assoc_request(struct sctp_endpoint *ep, struct sk_buff *skb) 1585 { 1586 return call_int_hook(sctp_assoc_request, 0, ep, skb); 1587 } 1588 EXPORT_SYMBOL(security_sctp_assoc_request); 1589 1590 int security_sctp_bind_connect(struct sock *sk, int optname, 1591 struct sockaddr *address, int addrlen) 1592 { 1593 return call_int_hook(sctp_bind_connect, 0, sk, optname, 1594 address, addrlen); 1595 } 1596 EXPORT_SYMBOL(security_sctp_bind_connect); 1597 1598 void security_sctp_sk_clone(struct sctp_endpoint *ep, struct sock *sk, 1599 struct sock *newsk) 1600 { 1601 call_void_hook(sctp_sk_clone, ep, sk, newsk); 1602 } 1603 EXPORT_SYMBOL(security_sctp_sk_clone); 1604 1605 #endif /* CONFIG_SECURITY_NETWORK */ 1606 1607 #ifdef CONFIG_SECURITY_INFINIBAND 1608 1609 int security_ib_pkey_access(void *sec, u64 subnet_prefix, u16 pkey) 1610 { 1611 return call_int_hook(ib_pkey_access, 0, sec, subnet_prefix, pkey); 1612 } 1613 EXPORT_SYMBOL(security_ib_pkey_access); 1614 1615 int security_ib_endport_manage_subnet(void *sec, const char *dev_name, u8 port_num) 1616 { 1617 return call_int_hook(ib_endport_manage_subnet, 0, sec, dev_name, port_num); 1618 } 1619 EXPORT_SYMBOL(security_ib_endport_manage_subnet); 1620 1621 int security_ib_alloc_security(void **sec) 1622 { 1623 return call_int_hook(ib_alloc_security, 0, sec); 1624 } 1625 EXPORT_SYMBOL(security_ib_alloc_security); 1626 1627 void security_ib_free_security(void *sec) 1628 { 1629 call_void_hook(ib_free_security, sec); 1630 } 1631 EXPORT_SYMBOL(security_ib_free_security); 1632 #endif /* CONFIG_SECURITY_INFINIBAND */ 1633 1634 #ifdef CONFIG_SECURITY_NETWORK_XFRM 1635 1636 int security_xfrm_policy_alloc(struct xfrm_sec_ctx **ctxp, 1637 struct xfrm_user_sec_ctx *sec_ctx, 1638 gfp_t gfp) 1639 { 1640 return call_int_hook(xfrm_policy_alloc_security, 0, ctxp, sec_ctx, gfp); 1641 } 1642 EXPORT_SYMBOL(security_xfrm_policy_alloc); 1643 1644 int security_xfrm_policy_clone(struct xfrm_sec_ctx *old_ctx, 1645 struct xfrm_sec_ctx **new_ctxp) 1646 { 1647 return call_int_hook(xfrm_policy_clone_security, 0, old_ctx, new_ctxp); 1648 } 1649 1650 void security_xfrm_policy_free(struct xfrm_sec_ctx *ctx) 1651 { 1652 call_void_hook(xfrm_policy_free_security, ctx); 1653 } 1654 EXPORT_SYMBOL(security_xfrm_policy_free); 1655 1656 int security_xfrm_policy_delete(struct xfrm_sec_ctx *ctx) 1657 { 1658 return call_int_hook(xfrm_policy_delete_security, 0, ctx); 1659 } 1660 1661 int security_xfrm_state_alloc(struct xfrm_state *x, 1662 struct xfrm_user_sec_ctx *sec_ctx) 1663 { 1664 return call_int_hook(xfrm_state_alloc, 0, x, sec_ctx); 1665 } 1666 EXPORT_SYMBOL(security_xfrm_state_alloc); 1667 1668 int security_xfrm_state_alloc_acquire(struct xfrm_state *x, 1669 struct xfrm_sec_ctx *polsec, u32 secid) 1670 { 1671 return call_int_hook(xfrm_state_alloc_acquire, 0, x, polsec, secid); 1672 } 1673 1674 int security_xfrm_state_delete(struct xfrm_state *x) 1675 { 1676 return call_int_hook(xfrm_state_delete_security, 0, x); 1677 } 1678 EXPORT_SYMBOL(security_xfrm_state_delete); 1679 1680 void security_xfrm_state_free(struct xfrm_state *x) 1681 { 1682 call_void_hook(xfrm_state_free_security, x); 1683 } 1684 1685 int security_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir) 1686 { 1687 return call_int_hook(xfrm_policy_lookup, 0, ctx, fl_secid, dir); 1688 } 1689 1690 int security_xfrm_state_pol_flow_match(struct xfrm_state *x, 1691 struct xfrm_policy *xp, 1692 const struct flowi *fl) 1693 { 1694 struct security_hook_list *hp; 1695 int rc = 1; 1696 1697 /* 1698 * Since this function is expected to return 0 or 1, the judgment 1699 * becomes difficult if multiple LSMs supply this call. Fortunately, 1700 * we can use the first LSM's judgment because currently only SELinux 1701 * supplies this call. 1702 * 1703 * For speed optimization, we explicitly break the loop rather than 1704 * using the macro 1705 */ 1706 hlist_for_each_entry(hp, &security_hook_heads.xfrm_state_pol_flow_match, 1707 list) { 1708 rc = hp->hook.xfrm_state_pol_flow_match(x, xp, fl); 1709 break; 1710 } 1711 return rc; 1712 } 1713 1714 int security_xfrm_decode_session(struct sk_buff *skb, u32 *secid) 1715 { 1716 return call_int_hook(xfrm_decode_session, 0, skb, secid, 1); 1717 } 1718 1719 void security_skb_classify_flow(struct sk_buff *skb, struct flowi *fl) 1720 { 1721 int rc = call_int_hook(xfrm_decode_session, 0, skb, &fl->flowi_secid, 1722 0); 1723 1724 BUG_ON(rc); 1725 } 1726 EXPORT_SYMBOL(security_skb_classify_flow); 1727 1728 #endif /* CONFIG_SECURITY_NETWORK_XFRM */ 1729 1730 #ifdef CONFIG_KEYS 1731 1732 int security_key_alloc(struct key *key, const struct cred *cred, 1733 unsigned long flags) 1734 { 1735 return call_int_hook(key_alloc, 0, key, cred, flags); 1736 } 1737 1738 void security_key_free(struct key *key) 1739 { 1740 call_void_hook(key_free, key); 1741 } 1742 1743 int security_key_permission(key_ref_t key_ref, 1744 const struct cred *cred, unsigned perm) 1745 { 1746 return call_int_hook(key_permission, 0, key_ref, cred, perm); 1747 } 1748 1749 int security_key_getsecurity(struct key *key, char **_buffer) 1750 { 1751 *_buffer = NULL; 1752 return call_int_hook(key_getsecurity, 0, key, _buffer); 1753 } 1754 1755 #endif /* CONFIG_KEYS */ 1756 1757 #ifdef CONFIG_AUDIT 1758 1759 int security_audit_rule_init(u32 field, u32 op, char *rulestr, void **lsmrule) 1760 { 1761 return call_int_hook(audit_rule_init, 0, field, op, rulestr, lsmrule); 1762 } 1763 1764 int security_audit_rule_known(struct audit_krule *krule) 1765 { 1766 return call_int_hook(audit_rule_known, 0, krule); 1767 } 1768 1769 void security_audit_rule_free(void *lsmrule) 1770 { 1771 call_void_hook(audit_rule_free, lsmrule); 1772 } 1773 1774 int security_audit_rule_match(u32 secid, u32 field, u32 op, void *lsmrule, 1775 struct audit_context *actx) 1776 { 1777 return call_int_hook(audit_rule_match, 0, secid, field, op, lsmrule, 1778 actx); 1779 } 1780 #endif /* CONFIG_AUDIT */ 1781 1782 #ifdef CONFIG_BPF_SYSCALL 1783 int security_bpf(int cmd, union bpf_attr *attr, unsigned int size) 1784 { 1785 return call_int_hook(bpf, 0, cmd, attr, size); 1786 } 1787 int security_bpf_map(struct bpf_map *map, fmode_t fmode) 1788 { 1789 return call_int_hook(bpf_map, 0, map, fmode); 1790 } 1791 int security_bpf_prog(struct bpf_prog *prog) 1792 { 1793 return call_int_hook(bpf_prog, 0, prog); 1794 } 1795 int security_bpf_map_alloc(struct bpf_map *map) 1796 { 1797 return call_int_hook(bpf_map_alloc_security, 0, map); 1798 } 1799 int security_bpf_prog_alloc(struct bpf_prog_aux *aux) 1800 { 1801 return call_int_hook(bpf_prog_alloc_security, 0, aux); 1802 } 1803 void security_bpf_map_free(struct bpf_map *map) 1804 { 1805 call_void_hook(bpf_map_free_security, map); 1806 } 1807 void security_bpf_prog_free(struct bpf_prog_aux *aux) 1808 { 1809 call_void_hook(bpf_prog_free_security, aux); 1810 } 1811 #endif /* CONFIG_BPF_SYSCALL */ 1812