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 */ 33static __initdata char chosen_lsm[SECURITY_NAME_MAX + 1] = 34 CONFIG_DEFAULT_SECURITY; 35 36static struct security_operations *security_ops; 37static struct security_operations default_security_ops = { 38 .name = "default", 39}; 40 41static 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 50static 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 */ 65int __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 76void reset_security_ops(void) 77{ 78 security_ops = &default_security_ops; 79} 80 81/* Save user chosen LSM */ 82static 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 */ 103int __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 */ 120int __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 138int security_binder_set_context_mgr(struct task_struct *mgr) 139{ 140 return security_ops->binder_set_context_mgr(mgr); 141} 142 143int security_binder_transaction(struct task_struct *from, 144 struct task_struct *to) 145{ 146 return security_ops->binder_transaction(from, to); 147} 148 149int security_binder_transfer_binder(struct task_struct *from, 150 struct task_struct *to) 151{ 152 return security_ops->binder_transfer_binder(from, to); 153} 154 155int security_binder_transfer_file(struct task_struct *from, 156 struct task_struct *to, struct file *file) 157{ 158 return security_ops->binder_transfer_file(from, to, file); 159} 160 161int security_ptrace_access_check(struct task_struct *child, unsigned int mode) 162{ 163#ifdef CONFIG_SECURITY_YAMA_STACKED 164 int rc; 165 rc = yama_ptrace_access_check(child, mode); 166 if (rc) 167 return rc; 168#endif 169 return security_ops->ptrace_access_check(child, mode); 170} 171 172int security_ptrace_traceme(struct task_struct *parent) 173{ 174#ifdef CONFIG_SECURITY_YAMA_STACKED 175 int rc; 176 rc = yama_ptrace_traceme(parent); 177 if (rc) 178 return rc; 179#endif 180 return security_ops->ptrace_traceme(parent); 181} 182 183int security_capget(struct task_struct *target, 184 kernel_cap_t *effective, 185 kernel_cap_t *inheritable, 186 kernel_cap_t *permitted) 187{ 188 return security_ops->capget(target, effective, inheritable, permitted); 189} 190 191int security_capset(struct cred *new, const struct cred *old, 192 const kernel_cap_t *effective, 193 const kernel_cap_t *inheritable, 194 const kernel_cap_t *permitted) 195{ 196 return security_ops->capset(new, old, 197 effective, inheritable, permitted); 198} 199 200int security_capable(const struct cred *cred, struct user_namespace *ns, 201 int cap) 202{ 203 return security_ops->capable(cred, ns, cap, SECURITY_CAP_AUDIT); 204} 205 206int security_capable_noaudit(const struct cred *cred, struct user_namespace *ns, 207 int cap) 208{ 209 return security_ops->capable(cred, ns, cap, SECURITY_CAP_NOAUDIT); 210} 211 212int security_quotactl(int cmds, int type, int id, struct super_block *sb) 213{ 214 return security_ops->quotactl(cmds, type, id, sb); 215} 216 217int security_quota_on(struct dentry *dentry) 218{ 219 return security_ops->quota_on(dentry); 220} 221 222int security_syslog(int type) 223{ 224 return security_ops->syslog(type); 225} 226 227int security_settime(const struct timespec *ts, const struct timezone *tz) 228{ 229 return security_ops->settime(ts, tz); 230} 231 232int security_vm_enough_memory_mm(struct mm_struct *mm, long pages) 233{ 234 return security_ops->vm_enough_memory(mm, pages); 235} 236 237int security_bprm_set_creds(struct linux_binprm *bprm) 238{ 239 return security_ops->bprm_set_creds(bprm); 240} 241 242int security_bprm_check(struct linux_binprm *bprm) 243{ 244 int ret; 245 246 ret = security_ops->bprm_check_security(bprm); 247 if (ret) 248 return ret; 249 return ima_bprm_check(bprm); 250} 251 252void security_bprm_committing_creds(struct linux_binprm *bprm) 253{ 254 security_ops->bprm_committing_creds(bprm); 255} 256 257void security_bprm_committed_creds(struct linux_binprm *bprm) 258{ 259 security_ops->bprm_committed_creds(bprm); 260} 261 262int security_bprm_secureexec(struct linux_binprm *bprm) 263{ 264 return security_ops->bprm_secureexec(bprm); 265} 266 267int security_sb_alloc(struct super_block *sb) 268{ 269 return security_ops->sb_alloc_security(sb); 270} 271 272void security_sb_free(struct super_block *sb) 273{ 274 security_ops->sb_free_security(sb); 275} 276 277int security_sb_copy_data(char *orig, char *copy) 278{ 279 return security_ops->sb_copy_data(orig, copy); 280} 281EXPORT_SYMBOL(security_sb_copy_data); 282 283int security_sb_remount(struct super_block *sb, void *data) 284{ 285 return security_ops->sb_remount(sb, data); 286} 287 288int security_sb_kern_mount(struct super_block *sb, int flags, void *data) 289{ 290 return security_ops->sb_kern_mount(sb, flags, data); 291} 292 293int security_sb_show_options(struct seq_file *m, struct super_block *sb) 294{ 295 return security_ops->sb_show_options(m, sb); 296} 297 298int security_sb_statfs(struct dentry *dentry) 299{ 300 return security_ops->sb_statfs(dentry); 301} 302 303int security_sb_mount(const char *dev_name, struct path *path, 304 const char *type, unsigned long flags, void *data) 305{ 306 return security_ops->sb_mount(dev_name, path, type, flags, data); 307} 308 309int security_sb_umount(struct vfsmount *mnt, int flags) 310{ 311 return security_ops->sb_umount(mnt, flags); 312} 313 314int security_sb_pivotroot(struct path *old_path, struct path *new_path) 315{ 316 return security_ops->sb_pivotroot(old_path, new_path); 317} 318 319int security_sb_set_mnt_opts(struct super_block *sb, 320 struct security_mnt_opts *opts, 321 unsigned long kern_flags, 322 unsigned long *set_kern_flags) 323{ 324 return security_ops->sb_set_mnt_opts(sb, opts, kern_flags, 325 set_kern_flags); 326} 327EXPORT_SYMBOL(security_sb_set_mnt_opts); 328 329int security_sb_clone_mnt_opts(const struct super_block *oldsb, 330 struct super_block *newsb) 331{ 332 return security_ops->sb_clone_mnt_opts(oldsb, newsb); 333} 334EXPORT_SYMBOL(security_sb_clone_mnt_opts); 335 336int security_sb_parse_opts_str(char *options, struct security_mnt_opts *opts) 337{ 338 return security_ops->sb_parse_opts_str(options, opts); 339} 340EXPORT_SYMBOL(security_sb_parse_opts_str); 341 342int security_inode_alloc(struct inode *inode) 343{ 344 inode->i_security = NULL; 345 return security_ops->inode_alloc_security(inode); 346} 347 348void security_inode_free(struct inode *inode) 349{ 350 integrity_inode_free(inode); 351 security_ops->inode_free_security(inode); 352} 353 354int security_dentry_init_security(struct dentry *dentry, int mode, 355 struct qstr *name, void **ctx, 356 u32 *ctxlen) 357{ 358 return security_ops->dentry_init_security(dentry, mode, name, 359 ctx, ctxlen); 360} 361EXPORT_SYMBOL(security_dentry_init_security); 362 363int security_inode_init_security(struct inode *inode, struct inode *dir, 364 const struct qstr *qstr, 365 const initxattrs initxattrs, void *fs_data) 366{ 367 struct xattr new_xattrs[MAX_LSM_EVM_XATTR + 1]; 368 struct xattr *lsm_xattr, *evm_xattr, *xattr; 369 int ret; 370 371 if (unlikely(IS_PRIVATE(inode))) 372 return 0; 373 374 if (!initxattrs) 375 return security_ops->inode_init_security(inode, dir, qstr, 376 NULL, NULL, NULL); 377 memset(new_xattrs, 0, sizeof(new_xattrs)); 378 lsm_xattr = new_xattrs; 379 ret = security_ops->inode_init_security(inode, dir, qstr, 380 &lsm_xattr->name, 381 &lsm_xattr->value, 382 &lsm_xattr->value_len); 383 if (ret) 384 goto out; 385 386 evm_xattr = lsm_xattr + 1; 387 ret = evm_inode_init_security(inode, lsm_xattr, evm_xattr); 388 if (ret) 389 goto out; 390 ret = initxattrs(inode, new_xattrs, fs_data); 391out: 392 for (xattr = new_xattrs; xattr->value != NULL; xattr++) 393 kfree(xattr->value); 394 return (ret == -EOPNOTSUPP) ? 0 : ret; 395} 396EXPORT_SYMBOL(security_inode_init_security); 397 398int security_old_inode_init_security(struct inode *inode, struct inode *dir, 399 const struct qstr *qstr, const char **name, 400 void **value, size_t *len) 401{ 402 if (unlikely(IS_PRIVATE(inode))) 403 return -EOPNOTSUPP; 404 return security_ops->inode_init_security(inode, dir, qstr, name, value, 405 len); 406} 407EXPORT_SYMBOL(security_old_inode_init_security); 408 409#ifdef CONFIG_SECURITY_PATH 410int security_path_mknod(struct path *dir, struct dentry *dentry, umode_t mode, 411 unsigned int dev) 412{ 413 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) 414 return 0; 415 return security_ops->path_mknod(dir, dentry, mode, dev); 416} 417EXPORT_SYMBOL(security_path_mknod); 418 419int security_path_mkdir(struct path *dir, struct dentry *dentry, umode_t mode) 420{ 421 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) 422 return 0; 423 return security_ops->path_mkdir(dir, dentry, mode); 424} 425EXPORT_SYMBOL(security_path_mkdir); 426 427int security_path_rmdir(struct path *dir, struct dentry *dentry) 428{ 429 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) 430 return 0; 431 return security_ops->path_rmdir(dir, dentry); 432} 433 434int security_path_unlink(struct path *dir, struct dentry *dentry) 435{ 436 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) 437 return 0; 438 return security_ops->path_unlink(dir, dentry); 439} 440EXPORT_SYMBOL(security_path_unlink); 441 442int security_path_symlink(struct path *dir, struct dentry *dentry, 443 const char *old_name) 444{ 445 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) 446 return 0; 447 return security_ops->path_symlink(dir, dentry, old_name); 448} 449 450int security_path_link(struct dentry *old_dentry, struct path *new_dir, 451 struct dentry *new_dentry) 452{ 453 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)))) 454 return 0; 455 return security_ops->path_link(old_dentry, new_dir, new_dentry); 456} 457 458int security_path_rename(struct path *old_dir, struct dentry *old_dentry, 459 struct path *new_dir, struct dentry *new_dentry, 460 unsigned int flags) 461{ 462 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) || 463 (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry))))) 464 return 0; 465 466 if (flags & RENAME_EXCHANGE) { 467 int err = security_ops->path_rename(new_dir, new_dentry, 468 old_dir, old_dentry); 469 if (err) 470 return err; 471 } 472 473 return security_ops->path_rename(old_dir, old_dentry, new_dir, 474 new_dentry); 475} 476EXPORT_SYMBOL(security_path_rename); 477 478int security_path_truncate(struct path *path) 479{ 480 if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry)))) 481 return 0; 482 return security_ops->path_truncate(path); 483} 484 485int security_path_chmod(struct path *path, umode_t mode) 486{ 487 if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry)))) 488 return 0; 489 return security_ops->path_chmod(path, mode); 490} 491 492int security_path_chown(struct path *path, kuid_t uid, kgid_t gid) 493{ 494 if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry)))) 495 return 0; 496 return security_ops->path_chown(path, uid, gid); 497} 498 499int security_path_chroot(struct path *path) 500{ 501 return security_ops->path_chroot(path); 502} 503#endif 504 505int security_inode_create(struct inode *dir, struct dentry *dentry, umode_t mode) 506{ 507 if (unlikely(IS_PRIVATE(dir))) 508 return 0; 509 return security_ops->inode_create(dir, dentry, mode); 510} 511EXPORT_SYMBOL_GPL(security_inode_create); 512 513int security_inode_link(struct dentry *old_dentry, struct inode *dir, 514 struct dentry *new_dentry) 515{ 516 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)))) 517 return 0; 518 return security_ops->inode_link(old_dentry, dir, new_dentry); 519} 520 521int security_inode_unlink(struct inode *dir, struct dentry *dentry) 522{ 523 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 524 return 0; 525 return security_ops->inode_unlink(dir, dentry); 526} 527 528int security_inode_symlink(struct inode *dir, struct dentry *dentry, 529 const char *old_name) 530{ 531 if (unlikely(IS_PRIVATE(dir))) 532 return 0; 533 return security_ops->inode_symlink(dir, dentry, old_name); 534} 535 536int security_inode_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) 537{ 538 if (unlikely(IS_PRIVATE(dir))) 539 return 0; 540 return security_ops->inode_mkdir(dir, dentry, mode); 541} 542EXPORT_SYMBOL_GPL(security_inode_mkdir); 543 544int security_inode_rmdir(struct inode *dir, struct dentry *dentry) 545{ 546 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 547 return 0; 548 return security_ops->inode_rmdir(dir, dentry); 549} 550 551int security_inode_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t dev) 552{ 553 if (unlikely(IS_PRIVATE(dir))) 554 return 0; 555 return security_ops->inode_mknod(dir, dentry, mode, dev); 556} 557 558int security_inode_rename(struct inode *old_dir, struct dentry *old_dentry, 559 struct inode *new_dir, struct dentry *new_dentry, 560 unsigned int flags) 561{ 562 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) || 563 (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry))))) 564 return 0; 565 566 if (flags & RENAME_EXCHANGE) { 567 int err = security_ops->inode_rename(new_dir, new_dentry, 568 old_dir, old_dentry); 569 if (err) 570 return err; 571 } 572 573 return security_ops->inode_rename(old_dir, old_dentry, 574 new_dir, new_dentry); 575} 576 577int security_inode_readlink(struct dentry *dentry) 578{ 579 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 580 return 0; 581 return security_ops->inode_readlink(dentry); 582} 583 584int security_inode_follow_link(struct dentry *dentry, struct nameidata *nd) 585{ 586 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 587 return 0; 588 return security_ops->inode_follow_link(dentry, nd); 589} 590 591int security_inode_permission(struct inode *inode, int mask) 592{ 593 if (unlikely(IS_PRIVATE(inode))) 594 return 0; 595 return security_ops->inode_permission(inode, mask); 596} 597 598int security_inode_setattr(struct dentry *dentry, struct iattr *attr) 599{ 600 int ret; 601 602 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 603 return 0; 604 ret = security_ops->inode_setattr(dentry, attr); 605 if (ret) 606 return ret; 607 return evm_inode_setattr(dentry, attr); 608} 609EXPORT_SYMBOL_GPL(security_inode_setattr); 610 611int security_inode_getattr(const struct path *path) 612{ 613 if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry)))) 614 return 0; 615 return security_ops->inode_getattr(path); 616} 617 618int security_inode_setxattr(struct dentry *dentry, const char *name, 619 const void *value, size_t size, int flags) 620{ 621 int ret; 622 623 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 624 return 0; 625 ret = security_ops->inode_setxattr(dentry, name, value, size, flags); 626 if (ret) 627 return ret; 628 ret = ima_inode_setxattr(dentry, name, value, size); 629 if (ret) 630 return ret; 631 return evm_inode_setxattr(dentry, name, value, size); 632} 633 634void security_inode_post_setxattr(struct dentry *dentry, const char *name, 635 const void *value, size_t size, int flags) 636{ 637 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 638 return; 639 security_ops->inode_post_setxattr(dentry, name, value, size, flags); 640 evm_inode_post_setxattr(dentry, name, value, size); 641} 642 643int security_inode_getxattr(struct dentry *dentry, const char *name) 644{ 645 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 646 return 0; 647 return security_ops->inode_getxattr(dentry, name); 648} 649 650int security_inode_listxattr(struct dentry *dentry) 651{ 652 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 653 return 0; 654 return security_ops->inode_listxattr(dentry); 655} 656 657int security_inode_removexattr(struct dentry *dentry, const char *name) 658{ 659 int ret; 660 661 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 662 return 0; 663 ret = security_ops->inode_removexattr(dentry, name); 664 if (ret) 665 return ret; 666 ret = ima_inode_removexattr(dentry, name); 667 if (ret) 668 return ret; 669 return evm_inode_removexattr(dentry, name); 670} 671 672int security_inode_need_killpriv(struct dentry *dentry) 673{ 674 return security_ops->inode_need_killpriv(dentry); 675} 676 677int security_inode_killpriv(struct dentry *dentry) 678{ 679 return security_ops->inode_killpriv(dentry); 680} 681 682int security_inode_getsecurity(const struct inode *inode, const char *name, void **buffer, bool alloc) 683{ 684 if (unlikely(IS_PRIVATE(inode))) 685 return -EOPNOTSUPP; 686 return security_ops->inode_getsecurity(inode, name, buffer, alloc); 687} 688 689int security_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags) 690{ 691 if (unlikely(IS_PRIVATE(inode))) 692 return -EOPNOTSUPP; 693 return security_ops->inode_setsecurity(inode, name, value, size, flags); 694} 695 696int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size) 697{ 698 if (unlikely(IS_PRIVATE(inode))) 699 return 0; 700 return security_ops->inode_listsecurity(inode, buffer, buffer_size); 701} 702EXPORT_SYMBOL(security_inode_listsecurity); 703 704void security_inode_getsecid(const struct inode *inode, u32 *secid) 705{ 706 security_ops->inode_getsecid(inode, secid); 707} 708 709int security_file_permission(struct file *file, int mask) 710{ 711 int ret; 712 713 ret = security_ops->file_permission(file, mask); 714 if (ret) 715 return ret; 716 717 return fsnotify_perm(file, mask); 718} 719 720int security_file_alloc(struct file *file) 721{ 722 return security_ops->file_alloc_security(file); 723} 724 725void security_file_free(struct file *file) 726{ 727 security_ops->file_free_security(file); 728} 729 730int security_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 731{ 732 return security_ops->file_ioctl(file, cmd, arg); 733} 734 735static inline unsigned long mmap_prot(struct file *file, unsigned long prot) 736{ 737 /* 738 * Does we have PROT_READ and does the application expect 739 * it to imply PROT_EXEC? If not, nothing to talk about... 740 */ 741 if ((prot & (PROT_READ | PROT_EXEC)) != PROT_READ) 742 return prot; 743 if (!(current->personality & READ_IMPLIES_EXEC)) 744 return prot; 745 /* 746 * if that's an anonymous mapping, let it. 747 */ 748 if (!file) 749 return prot | PROT_EXEC; 750 /* 751 * ditto if it's not on noexec mount, except that on !MMU we need 752 * NOMMU_MAP_EXEC (== VM_MAYEXEC) in this case 753 */ 754 if (!(file->f_path.mnt->mnt_flags & MNT_NOEXEC)) { 755#ifndef CONFIG_MMU 756 if (file->f_op->mmap_capabilities) { 757 unsigned caps = file->f_op->mmap_capabilities(file); 758 if (!(caps & NOMMU_MAP_EXEC)) 759 return prot; 760 } 761#endif 762 return prot | PROT_EXEC; 763 } 764 /* anything on noexec mount won't get PROT_EXEC */ 765 return prot; 766} 767 768int security_mmap_file(struct file *file, unsigned long prot, 769 unsigned long flags) 770{ 771 int ret; 772 ret = security_ops->mmap_file(file, prot, 773 mmap_prot(file, prot), flags); 774 if (ret) 775 return ret; 776 return ima_file_mmap(file, prot); 777} 778 779int security_mmap_addr(unsigned long addr) 780{ 781 return security_ops->mmap_addr(addr); 782} 783 784int security_file_mprotect(struct vm_area_struct *vma, unsigned long reqprot, 785 unsigned long prot) 786{ 787 return security_ops->file_mprotect(vma, reqprot, prot); 788} 789 790int security_file_lock(struct file *file, unsigned int cmd) 791{ 792 return security_ops->file_lock(file, cmd); 793} 794 795int security_file_fcntl(struct file *file, unsigned int cmd, unsigned long arg) 796{ 797 return security_ops->file_fcntl(file, cmd, arg); 798} 799 800void security_file_set_fowner(struct file *file) 801{ 802 security_ops->file_set_fowner(file); 803} 804 805int security_file_send_sigiotask(struct task_struct *tsk, 806 struct fown_struct *fown, int sig) 807{ 808 return security_ops->file_send_sigiotask(tsk, fown, sig); 809} 810 811int security_file_receive(struct file *file) 812{ 813 return security_ops->file_receive(file); 814} 815 816int security_file_open(struct file *file, const struct cred *cred) 817{ 818 int ret; 819 820 ret = security_ops->file_open(file, cred); 821 if (ret) 822 return ret; 823 824 return fsnotify_perm(file, MAY_OPEN); 825} 826 827int security_task_create(unsigned long clone_flags) 828{ 829 return security_ops->task_create(clone_flags); 830} 831 832void security_task_free(struct task_struct *task) 833{ 834#ifdef CONFIG_SECURITY_YAMA_STACKED 835 yama_task_free(task); 836#endif 837 security_ops->task_free(task); 838} 839 840int security_cred_alloc_blank(struct cred *cred, gfp_t gfp) 841{ 842 return security_ops->cred_alloc_blank(cred, gfp); 843} 844 845void security_cred_free(struct cred *cred) 846{ 847 security_ops->cred_free(cred); 848} 849 850int security_prepare_creds(struct cred *new, const struct cred *old, gfp_t gfp) 851{ 852 return security_ops->cred_prepare(new, old, gfp); 853} 854 855void security_transfer_creds(struct cred *new, const struct cred *old) 856{ 857 security_ops->cred_transfer(new, old); 858} 859 860int security_kernel_act_as(struct cred *new, u32 secid) 861{ 862 return security_ops->kernel_act_as(new, secid); 863} 864 865int security_kernel_create_files_as(struct cred *new, struct inode *inode) 866{ 867 return security_ops->kernel_create_files_as(new, inode); 868} 869 870int security_kernel_fw_from_file(struct file *file, char *buf, size_t size) 871{ 872 int ret; 873 874 ret = security_ops->kernel_fw_from_file(file, buf, size); 875 if (ret) 876 return ret; 877 return ima_fw_from_file(file, buf, size); 878} 879EXPORT_SYMBOL_GPL(security_kernel_fw_from_file); 880 881int security_kernel_module_request(char *kmod_name) 882{ 883 return security_ops->kernel_module_request(kmod_name); 884} 885 886int security_kernel_module_from_file(struct file *file) 887{ 888 int ret; 889 890 ret = security_ops->kernel_module_from_file(file); 891 if (ret) 892 return ret; 893 return ima_module_check(file); 894} 895 896int security_task_fix_setuid(struct cred *new, const struct cred *old, 897 int flags) 898{ 899 return security_ops->task_fix_setuid(new, old, flags); 900} 901 902int security_task_setpgid(struct task_struct *p, pid_t pgid) 903{ 904 return security_ops->task_setpgid(p, pgid); 905} 906 907int security_task_getpgid(struct task_struct *p) 908{ 909 return security_ops->task_getpgid(p); 910} 911 912int security_task_getsid(struct task_struct *p) 913{ 914 return security_ops->task_getsid(p); 915} 916 917void security_task_getsecid(struct task_struct *p, u32 *secid) 918{ 919 security_ops->task_getsecid(p, secid); 920} 921EXPORT_SYMBOL(security_task_getsecid); 922 923int security_task_setnice(struct task_struct *p, int nice) 924{ 925 return security_ops->task_setnice(p, nice); 926} 927 928int security_task_setioprio(struct task_struct *p, int ioprio) 929{ 930 return security_ops->task_setioprio(p, ioprio); 931} 932 933int security_task_getioprio(struct task_struct *p) 934{ 935 return security_ops->task_getioprio(p); 936} 937 938int security_task_setrlimit(struct task_struct *p, unsigned int resource, 939 struct rlimit *new_rlim) 940{ 941 return security_ops->task_setrlimit(p, resource, new_rlim); 942} 943 944int security_task_setscheduler(struct task_struct *p) 945{ 946 return security_ops->task_setscheduler(p); 947} 948 949int security_task_getscheduler(struct task_struct *p) 950{ 951 return security_ops->task_getscheduler(p); 952} 953 954int security_task_movememory(struct task_struct *p) 955{ 956 return security_ops->task_movememory(p); 957} 958 959int security_task_kill(struct task_struct *p, struct siginfo *info, 960 int sig, u32 secid) 961{ 962 return security_ops->task_kill(p, info, sig, secid); 963} 964 965int security_task_wait(struct task_struct *p) 966{ 967 return security_ops->task_wait(p); 968} 969 970int security_task_prctl(int option, unsigned long arg2, unsigned long arg3, 971 unsigned long arg4, unsigned long arg5) 972{ 973#ifdef CONFIG_SECURITY_YAMA_STACKED 974 int rc; 975 rc = yama_task_prctl(option, arg2, arg3, arg4, arg5); 976 if (rc != -ENOSYS) 977 return rc; 978#endif 979 return security_ops->task_prctl(option, arg2, arg3, arg4, arg5); 980} 981 982void security_task_to_inode(struct task_struct *p, struct inode *inode) 983{ 984 security_ops->task_to_inode(p, inode); 985} 986 987int security_ipc_permission(struct kern_ipc_perm *ipcp, short flag) 988{ 989 return security_ops->ipc_permission(ipcp, flag); 990} 991 992void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid) 993{ 994 security_ops->ipc_getsecid(ipcp, secid); 995} 996 997int security_msg_msg_alloc(struct msg_msg *msg) 998{ 999 return security_ops->msg_msg_alloc_security(msg); 1000} 1001 1002void security_msg_msg_free(struct msg_msg *msg) 1003{ 1004 security_ops->msg_msg_free_security(msg); 1005} 1006 1007int security_msg_queue_alloc(struct msg_queue *msq) 1008{ 1009 return security_ops->msg_queue_alloc_security(msq); 1010} 1011 1012void security_msg_queue_free(struct msg_queue *msq) 1013{ 1014 security_ops->msg_queue_free_security(msq); 1015} 1016 1017int security_msg_queue_associate(struct msg_queue *msq, int msqflg) 1018{ 1019 return security_ops->msg_queue_associate(msq, msqflg); 1020} 1021 1022int security_msg_queue_msgctl(struct msg_queue *msq, int cmd) 1023{ 1024 return security_ops->msg_queue_msgctl(msq, cmd); 1025} 1026 1027int security_msg_queue_msgsnd(struct msg_queue *msq, 1028 struct msg_msg *msg, int msqflg) 1029{ 1030 return security_ops->msg_queue_msgsnd(msq, msg, msqflg); 1031} 1032 1033int security_msg_queue_msgrcv(struct msg_queue *msq, struct msg_msg *msg, 1034 struct task_struct *target, long type, int mode) 1035{ 1036 return security_ops->msg_queue_msgrcv(msq, msg, target, type, mode); 1037} 1038 1039int security_shm_alloc(struct shmid_kernel *shp) 1040{ 1041 return security_ops->shm_alloc_security(shp); 1042} 1043 1044void security_shm_free(struct shmid_kernel *shp) 1045{ 1046 security_ops->shm_free_security(shp); 1047} 1048 1049int security_shm_associate(struct shmid_kernel *shp, int shmflg) 1050{ 1051 return security_ops->shm_associate(shp, shmflg); 1052} 1053 1054int security_shm_shmctl(struct shmid_kernel *shp, int cmd) 1055{ 1056 return security_ops->shm_shmctl(shp, cmd); 1057} 1058 1059int security_shm_shmat(struct shmid_kernel *shp, char __user *shmaddr, int shmflg) 1060{ 1061 return security_ops->shm_shmat(shp, shmaddr, shmflg); 1062} 1063 1064int security_sem_alloc(struct sem_array *sma) 1065{ 1066 return security_ops->sem_alloc_security(sma); 1067} 1068 1069void security_sem_free(struct sem_array *sma) 1070{ 1071 security_ops->sem_free_security(sma); 1072} 1073 1074int security_sem_associate(struct sem_array *sma, int semflg) 1075{ 1076 return security_ops->sem_associate(sma, semflg); 1077} 1078 1079int security_sem_semctl(struct sem_array *sma, int cmd) 1080{ 1081 return security_ops->sem_semctl(sma, cmd); 1082} 1083 1084int security_sem_semop(struct sem_array *sma, struct sembuf *sops, 1085 unsigned nsops, int alter) 1086{ 1087 return security_ops->sem_semop(sma, sops, nsops, alter); 1088} 1089 1090void security_d_instantiate(struct dentry *dentry, struct inode *inode) 1091{ 1092 if (unlikely(inode && IS_PRIVATE(inode))) 1093 return; 1094 security_ops->d_instantiate(dentry, inode); 1095} 1096EXPORT_SYMBOL(security_d_instantiate); 1097 1098int security_getprocattr(struct task_struct *p, char *name, char **value) 1099{ 1100 return security_ops->getprocattr(p, name, value); 1101} 1102 1103int security_setprocattr(struct task_struct *p, char *name, void *value, size_t size) 1104{ 1105 return security_ops->setprocattr(p, name, value, size); 1106} 1107 1108int security_netlink_send(struct sock *sk, struct sk_buff *skb) 1109{ 1110 return security_ops->netlink_send(sk, skb); 1111} 1112 1113int security_ismaclabel(const char *name) 1114{ 1115 return security_ops->ismaclabel(name); 1116} 1117EXPORT_SYMBOL(security_ismaclabel); 1118 1119int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen) 1120{ 1121 return security_ops->secid_to_secctx(secid, secdata, seclen); 1122} 1123EXPORT_SYMBOL(security_secid_to_secctx); 1124 1125int security_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid) 1126{ 1127 return security_ops->secctx_to_secid(secdata, seclen, secid); 1128} 1129EXPORT_SYMBOL(security_secctx_to_secid); 1130 1131void security_release_secctx(char *secdata, u32 seclen) 1132{ 1133 security_ops->release_secctx(secdata, seclen); 1134} 1135EXPORT_SYMBOL(security_release_secctx); 1136 1137int security_inode_notifysecctx(struct inode *inode, void *ctx, u32 ctxlen) 1138{ 1139 return security_ops->inode_notifysecctx(inode, ctx, ctxlen); 1140} 1141EXPORT_SYMBOL(security_inode_notifysecctx); 1142 1143int security_inode_setsecctx(struct dentry *dentry, void *ctx, u32 ctxlen) 1144{ 1145 return security_ops->inode_setsecctx(dentry, ctx, ctxlen); 1146} 1147EXPORT_SYMBOL(security_inode_setsecctx); 1148 1149int security_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen) 1150{ 1151 return security_ops->inode_getsecctx(inode, ctx, ctxlen); 1152} 1153EXPORT_SYMBOL(security_inode_getsecctx); 1154 1155#ifdef CONFIG_SECURITY_NETWORK 1156 1157int security_unix_stream_connect(struct sock *sock, struct sock *other, struct sock *newsk) 1158{ 1159 return security_ops->unix_stream_connect(sock, other, newsk); 1160} 1161EXPORT_SYMBOL(security_unix_stream_connect); 1162 1163int security_unix_may_send(struct socket *sock, struct socket *other) 1164{ 1165 return security_ops->unix_may_send(sock, other); 1166} 1167EXPORT_SYMBOL(security_unix_may_send); 1168 1169int security_socket_create(int family, int type, int protocol, int kern) 1170{ 1171 return security_ops->socket_create(family, type, protocol, kern); 1172} 1173 1174int security_socket_post_create(struct socket *sock, int family, 1175 int type, int protocol, int kern) 1176{ 1177 return security_ops->socket_post_create(sock, family, type, 1178 protocol, kern); 1179} 1180 1181int security_socket_bind(struct socket *sock, struct sockaddr *address, int addrlen) 1182{ 1183 return security_ops->socket_bind(sock, address, addrlen); 1184} 1185 1186int security_socket_connect(struct socket *sock, struct sockaddr *address, int addrlen) 1187{ 1188 return security_ops->socket_connect(sock, address, addrlen); 1189} 1190 1191int security_socket_listen(struct socket *sock, int backlog) 1192{ 1193 return security_ops->socket_listen(sock, backlog); 1194} 1195 1196int security_socket_accept(struct socket *sock, struct socket *newsock) 1197{ 1198 return security_ops->socket_accept(sock, newsock); 1199} 1200 1201int security_socket_sendmsg(struct socket *sock, struct msghdr *msg, int size) 1202{ 1203 return security_ops->socket_sendmsg(sock, msg, size); 1204} 1205 1206int security_socket_recvmsg(struct socket *sock, struct msghdr *msg, 1207 int size, int flags) 1208{ 1209 return security_ops->socket_recvmsg(sock, msg, size, flags); 1210} 1211 1212int security_socket_getsockname(struct socket *sock) 1213{ 1214 return security_ops->socket_getsockname(sock); 1215} 1216 1217int security_socket_getpeername(struct socket *sock) 1218{ 1219 return security_ops->socket_getpeername(sock); 1220} 1221 1222int security_socket_getsockopt(struct socket *sock, int level, int optname) 1223{ 1224 return security_ops->socket_getsockopt(sock, level, optname); 1225} 1226 1227int security_socket_setsockopt(struct socket *sock, int level, int optname) 1228{ 1229 return security_ops->socket_setsockopt(sock, level, optname); 1230} 1231 1232int security_socket_shutdown(struct socket *sock, int how) 1233{ 1234 return security_ops->socket_shutdown(sock, how); 1235} 1236 1237int security_sock_rcv_skb(struct sock *sk, struct sk_buff *skb) 1238{ 1239 return security_ops->socket_sock_rcv_skb(sk, skb); 1240} 1241EXPORT_SYMBOL(security_sock_rcv_skb); 1242 1243int security_socket_getpeersec_stream(struct socket *sock, char __user *optval, 1244 int __user *optlen, unsigned len) 1245{ 1246 return security_ops->socket_getpeersec_stream(sock, optval, optlen, len); 1247} 1248 1249int security_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb, u32 *secid) 1250{ 1251 return security_ops->socket_getpeersec_dgram(sock, skb, secid); 1252} 1253EXPORT_SYMBOL(security_socket_getpeersec_dgram); 1254 1255int security_sk_alloc(struct sock *sk, int family, gfp_t priority) 1256{ 1257 return security_ops->sk_alloc_security(sk, family, priority); 1258} 1259 1260void security_sk_free(struct sock *sk) 1261{ 1262 security_ops->sk_free_security(sk); 1263} 1264 1265void security_sk_clone(const struct sock *sk, struct sock *newsk) 1266{ 1267 security_ops->sk_clone_security(sk, newsk); 1268} 1269EXPORT_SYMBOL(security_sk_clone); 1270 1271void security_sk_classify_flow(struct sock *sk, struct flowi *fl) 1272{ 1273 security_ops->sk_getsecid(sk, &fl->flowi_secid); 1274} 1275EXPORT_SYMBOL(security_sk_classify_flow); 1276 1277void security_req_classify_flow(const struct request_sock *req, struct flowi *fl) 1278{ 1279 security_ops->req_classify_flow(req, fl); 1280} 1281EXPORT_SYMBOL(security_req_classify_flow); 1282 1283void security_sock_graft(struct sock *sk, struct socket *parent) 1284{ 1285 security_ops->sock_graft(sk, parent); 1286} 1287EXPORT_SYMBOL(security_sock_graft); 1288 1289int security_inet_conn_request(struct sock *sk, 1290 struct sk_buff *skb, struct request_sock *req) 1291{ 1292 return security_ops->inet_conn_request(sk, skb, req); 1293} 1294EXPORT_SYMBOL(security_inet_conn_request); 1295 1296void security_inet_csk_clone(struct sock *newsk, 1297 const struct request_sock *req) 1298{ 1299 security_ops->inet_csk_clone(newsk, req); 1300} 1301 1302void security_inet_conn_established(struct sock *sk, 1303 struct sk_buff *skb) 1304{ 1305 security_ops->inet_conn_established(sk, skb); 1306} 1307 1308int security_secmark_relabel_packet(u32 secid) 1309{ 1310 return security_ops->secmark_relabel_packet(secid); 1311} 1312EXPORT_SYMBOL(security_secmark_relabel_packet); 1313 1314void security_secmark_refcount_inc(void) 1315{ 1316 security_ops->secmark_refcount_inc(); 1317} 1318EXPORT_SYMBOL(security_secmark_refcount_inc); 1319 1320void security_secmark_refcount_dec(void) 1321{ 1322 security_ops->secmark_refcount_dec(); 1323} 1324EXPORT_SYMBOL(security_secmark_refcount_dec); 1325 1326int security_tun_dev_alloc_security(void **security) 1327{ 1328 return security_ops->tun_dev_alloc_security(security); 1329} 1330EXPORT_SYMBOL(security_tun_dev_alloc_security); 1331 1332void security_tun_dev_free_security(void *security) 1333{ 1334 security_ops->tun_dev_free_security(security); 1335} 1336EXPORT_SYMBOL(security_tun_dev_free_security); 1337 1338int security_tun_dev_create(void) 1339{ 1340 return security_ops->tun_dev_create(); 1341} 1342EXPORT_SYMBOL(security_tun_dev_create); 1343 1344int security_tun_dev_attach_queue(void *security) 1345{ 1346 return security_ops->tun_dev_attach_queue(security); 1347} 1348EXPORT_SYMBOL(security_tun_dev_attach_queue); 1349 1350int security_tun_dev_attach(struct sock *sk, void *security) 1351{ 1352 return security_ops->tun_dev_attach(sk, security); 1353} 1354EXPORT_SYMBOL(security_tun_dev_attach); 1355 1356int security_tun_dev_open(void *security) 1357{ 1358 return security_ops->tun_dev_open(security); 1359} 1360EXPORT_SYMBOL(security_tun_dev_open); 1361 1362#endif /* CONFIG_SECURITY_NETWORK */ 1363 1364#ifdef CONFIG_SECURITY_NETWORK_XFRM 1365 1366int security_xfrm_policy_alloc(struct xfrm_sec_ctx **ctxp, 1367 struct xfrm_user_sec_ctx *sec_ctx, 1368 gfp_t gfp) 1369{ 1370 return security_ops->xfrm_policy_alloc_security(ctxp, sec_ctx, gfp); 1371} 1372EXPORT_SYMBOL(security_xfrm_policy_alloc); 1373 1374int security_xfrm_policy_clone(struct xfrm_sec_ctx *old_ctx, 1375 struct xfrm_sec_ctx **new_ctxp) 1376{ 1377 return security_ops->xfrm_policy_clone_security(old_ctx, new_ctxp); 1378} 1379 1380void security_xfrm_policy_free(struct xfrm_sec_ctx *ctx) 1381{ 1382 security_ops->xfrm_policy_free_security(ctx); 1383} 1384EXPORT_SYMBOL(security_xfrm_policy_free); 1385 1386int security_xfrm_policy_delete(struct xfrm_sec_ctx *ctx) 1387{ 1388 return security_ops->xfrm_policy_delete_security(ctx); 1389} 1390 1391int security_xfrm_state_alloc(struct xfrm_state *x, 1392 struct xfrm_user_sec_ctx *sec_ctx) 1393{ 1394 return security_ops->xfrm_state_alloc(x, sec_ctx); 1395} 1396EXPORT_SYMBOL(security_xfrm_state_alloc); 1397 1398int security_xfrm_state_alloc_acquire(struct xfrm_state *x, 1399 struct xfrm_sec_ctx *polsec, u32 secid) 1400{ 1401 return security_ops->xfrm_state_alloc_acquire(x, polsec, secid); 1402} 1403 1404int security_xfrm_state_delete(struct xfrm_state *x) 1405{ 1406 return security_ops->xfrm_state_delete_security(x); 1407} 1408EXPORT_SYMBOL(security_xfrm_state_delete); 1409 1410void security_xfrm_state_free(struct xfrm_state *x) 1411{ 1412 security_ops->xfrm_state_free_security(x); 1413} 1414 1415int security_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir) 1416{ 1417 return security_ops->xfrm_policy_lookup(ctx, fl_secid, dir); 1418} 1419 1420int security_xfrm_state_pol_flow_match(struct xfrm_state *x, 1421 struct xfrm_policy *xp, 1422 const struct flowi *fl) 1423{ 1424 return security_ops->xfrm_state_pol_flow_match(x, xp, fl); 1425} 1426 1427int security_xfrm_decode_session(struct sk_buff *skb, u32 *secid) 1428{ 1429 return security_ops->xfrm_decode_session(skb, secid, 1); 1430} 1431 1432void security_skb_classify_flow(struct sk_buff *skb, struct flowi *fl) 1433{ 1434 int rc = security_ops->xfrm_decode_session(skb, &fl->flowi_secid, 0); 1435 1436 BUG_ON(rc); 1437} 1438EXPORT_SYMBOL(security_skb_classify_flow); 1439 1440#endif /* CONFIG_SECURITY_NETWORK_XFRM */ 1441 1442#ifdef CONFIG_KEYS 1443 1444int security_key_alloc(struct key *key, const struct cred *cred, 1445 unsigned long flags) 1446{ 1447 return security_ops->key_alloc(key, cred, flags); 1448} 1449 1450void security_key_free(struct key *key) 1451{ 1452 security_ops->key_free(key); 1453} 1454 1455int security_key_permission(key_ref_t key_ref, 1456 const struct cred *cred, unsigned perm) 1457{ 1458 return security_ops->key_permission(key_ref, cred, perm); 1459} 1460 1461int security_key_getsecurity(struct key *key, char **_buffer) 1462{ 1463 return security_ops->key_getsecurity(key, _buffer); 1464} 1465 1466#endif /* CONFIG_KEYS */ 1467 1468#ifdef CONFIG_AUDIT 1469 1470int security_audit_rule_init(u32 field, u32 op, char *rulestr, void **lsmrule) 1471{ 1472 return security_ops->audit_rule_init(field, op, rulestr, lsmrule); 1473} 1474 1475int security_audit_rule_known(struct audit_krule *krule) 1476{ 1477 return security_ops->audit_rule_known(krule); 1478} 1479 1480void security_audit_rule_free(void *lsmrule) 1481{ 1482 security_ops->audit_rule_free(lsmrule); 1483} 1484 1485int security_audit_rule_match(u32 secid, u32 field, u32 op, void *lsmrule, 1486 struct audit_context *actx) 1487{ 1488 return security_ops->audit_rule_match(secid, field, op, lsmrule, actx); 1489} 1490 1491#endif /* CONFIG_AUDIT */ 1492