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