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