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