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