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