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