dummy.c 28 KB

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  1. /*
  2. * Stub functions for the default security function pointers in case no
  3. * security model is loaded.
  4. *
  5. * Copyright (C) 2001 WireX Communications, Inc <chris@wirex.com>
  6. * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
  7. * Copyright (C) 2001 Networks Associates Technology, Inc <ssmalley@nai.com>
  8. *
  9. * This program is free software; you can redistribute it and/or modify
  10. * it under the terms of the GNU General Public License as published by
  11. * the Free Software Foundation; either version 2 of the License, or
  12. * (at your option) any later version.
  13. */
  14. #undef DEBUG
  15. #include <linux/capability.h>
  16. #include <linux/kernel.h>
  17. #include <linux/mman.h>
  18. #include <linux/pagemap.h>
  19. #include <linux/swap.h>
  20. #include <linux/security.h>
  21. #include <linux/skbuff.h>
  22. #include <linux/netlink.h>
  23. #include <net/sock.h>
  24. #include <linux/xattr.h>
  25. #include <linux/hugetlb.h>
  26. #include <linux/ptrace.h>
  27. #include <linux/file.h>
  28. #include <linux/prctl.h>
  29. #include <linux/securebits.h>
  30. static int dummy_ptrace (struct task_struct *parent, struct task_struct *child,
  31. unsigned int mode)
  32. {
  33. return 0;
  34. }
  35. static int dummy_capget (struct task_struct *target, kernel_cap_t * effective,
  36. kernel_cap_t * inheritable, kernel_cap_t * permitted)
  37. {
  38. if (target->euid == 0) {
  39. cap_set_full(*permitted);
  40. cap_set_init_eff(*effective);
  41. } else {
  42. cap_clear(*permitted);
  43. cap_clear(*effective);
  44. }
  45. cap_clear(*inheritable);
  46. if (target->fsuid != 0) {
  47. *permitted = cap_drop_fs_set(*permitted);
  48. *effective = cap_drop_fs_set(*effective);
  49. }
  50. return 0;
  51. }
  52. static int dummy_capset_check (struct task_struct *target,
  53. kernel_cap_t * effective,
  54. kernel_cap_t * inheritable,
  55. kernel_cap_t * permitted)
  56. {
  57. return -EPERM;
  58. }
  59. static void dummy_capset_set (struct task_struct *target,
  60. kernel_cap_t * effective,
  61. kernel_cap_t * inheritable,
  62. kernel_cap_t * permitted)
  63. {
  64. return;
  65. }
  66. static int dummy_acct (struct file *file)
  67. {
  68. return 0;
  69. }
  70. static int dummy_capable (struct task_struct *tsk, int cap)
  71. {
  72. if (cap_raised (tsk->cap_effective, cap))
  73. return 0;
  74. return -EPERM;
  75. }
  76. static int dummy_sysctl (ctl_table * table, int op)
  77. {
  78. return 0;
  79. }
  80. static int dummy_quotactl (int cmds, int type, int id, struct super_block *sb)
  81. {
  82. return 0;
  83. }
  84. static int dummy_quota_on (struct dentry *dentry)
  85. {
  86. return 0;
  87. }
  88. static int dummy_syslog (int type)
  89. {
  90. if ((type != 3 && type != 10) && current->euid)
  91. return -EPERM;
  92. return 0;
  93. }
  94. static int dummy_settime(struct timespec *ts, struct timezone *tz)
  95. {
  96. if (!capable(CAP_SYS_TIME))
  97. return -EPERM;
  98. return 0;
  99. }
  100. static int dummy_vm_enough_memory(struct mm_struct *mm, long pages)
  101. {
  102. int cap_sys_admin = 0;
  103. if (dummy_capable(current, CAP_SYS_ADMIN) == 0)
  104. cap_sys_admin = 1;
  105. return __vm_enough_memory(mm, pages, cap_sys_admin);
  106. }
  107. static int dummy_bprm_alloc_security (struct linux_binprm *bprm)
  108. {
  109. return 0;
  110. }
  111. static void dummy_bprm_free_security (struct linux_binprm *bprm)
  112. {
  113. return;
  114. }
  115. static void dummy_bprm_apply_creds (struct linux_binprm *bprm, int unsafe)
  116. {
  117. if (bprm->e_uid != current->uid || bprm->e_gid != current->gid) {
  118. set_dumpable(current->mm, suid_dumpable);
  119. if ((unsafe & ~LSM_UNSAFE_PTRACE_CAP) && !capable(CAP_SETUID)) {
  120. bprm->e_uid = current->uid;
  121. bprm->e_gid = current->gid;
  122. }
  123. }
  124. current->suid = current->euid = current->fsuid = bprm->e_uid;
  125. current->sgid = current->egid = current->fsgid = bprm->e_gid;
  126. dummy_capget(current, &current->cap_effective, &current->cap_inheritable, &current->cap_permitted);
  127. }
  128. static void dummy_bprm_post_apply_creds (struct linux_binprm *bprm)
  129. {
  130. return;
  131. }
  132. static int dummy_bprm_set_security (struct linux_binprm *bprm)
  133. {
  134. return 0;
  135. }
  136. static int dummy_bprm_check_security (struct linux_binprm *bprm)
  137. {
  138. return 0;
  139. }
  140. static int dummy_bprm_secureexec (struct linux_binprm *bprm)
  141. {
  142. /* The new userland will simply use the value provided
  143. in the AT_SECURE field to decide whether secure mode
  144. is required. Hence, this logic is required to preserve
  145. the legacy decision algorithm used by the old userland. */
  146. return (current->euid != current->uid ||
  147. current->egid != current->gid);
  148. }
  149. static int dummy_sb_alloc_security (struct super_block *sb)
  150. {
  151. return 0;
  152. }
  153. static void dummy_sb_free_security (struct super_block *sb)
  154. {
  155. return;
  156. }
  157. static int dummy_sb_copy_data (char *orig, char *copy)
  158. {
  159. return 0;
  160. }
  161. static int dummy_sb_kern_mount (struct super_block *sb, void *data)
  162. {
  163. return 0;
  164. }
  165. static int dummy_sb_show_options(struct seq_file *m, struct super_block *sb)
  166. {
  167. return 0;
  168. }
  169. static int dummy_sb_statfs (struct dentry *dentry)
  170. {
  171. return 0;
  172. }
  173. static int dummy_sb_mount (char *dev_name, struct path *path, char *type,
  174. unsigned long flags, void *data)
  175. {
  176. return 0;
  177. }
  178. static int dummy_sb_check_sb (struct vfsmount *mnt, struct path *path)
  179. {
  180. return 0;
  181. }
  182. static int dummy_sb_umount (struct vfsmount *mnt, int flags)
  183. {
  184. return 0;
  185. }
  186. static void dummy_sb_umount_close (struct vfsmount *mnt)
  187. {
  188. return;
  189. }
  190. static void dummy_sb_umount_busy (struct vfsmount *mnt)
  191. {
  192. return;
  193. }
  194. static void dummy_sb_post_remount (struct vfsmount *mnt, unsigned long flags,
  195. void *data)
  196. {
  197. return;
  198. }
  199. static void dummy_sb_post_addmount (struct vfsmount *mnt, struct path *path)
  200. {
  201. return;
  202. }
  203. static int dummy_sb_pivotroot (struct path *old_path, struct path *new_path)
  204. {
  205. return 0;
  206. }
  207. static void dummy_sb_post_pivotroot (struct path *old_path, struct path *new_path)
  208. {
  209. return;
  210. }
  211. static int dummy_sb_set_mnt_opts(struct super_block *sb,
  212. struct security_mnt_opts *opts)
  213. {
  214. if (unlikely(opts->num_mnt_opts))
  215. return -EOPNOTSUPP;
  216. return 0;
  217. }
  218. static void dummy_sb_clone_mnt_opts(const struct super_block *oldsb,
  219. struct super_block *newsb)
  220. {
  221. return;
  222. }
  223. static int dummy_sb_parse_opts_str(char *options, struct security_mnt_opts *opts)
  224. {
  225. return 0;
  226. }
  227. static int dummy_inode_alloc_security (struct inode *inode)
  228. {
  229. return 0;
  230. }
  231. static void dummy_inode_free_security (struct inode *inode)
  232. {
  233. return;
  234. }
  235. static int dummy_inode_init_security (struct inode *inode, struct inode *dir,
  236. char **name, void **value, size_t *len)
  237. {
  238. return -EOPNOTSUPP;
  239. }
  240. static int dummy_inode_create (struct inode *inode, struct dentry *dentry,
  241. int mask)
  242. {
  243. return 0;
  244. }
  245. static int dummy_inode_link (struct dentry *old_dentry, struct inode *inode,
  246. struct dentry *new_dentry)
  247. {
  248. return 0;
  249. }
  250. static int dummy_inode_unlink (struct inode *inode, struct dentry *dentry)
  251. {
  252. return 0;
  253. }
  254. static int dummy_inode_symlink (struct inode *inode, struct dentry *dentry,
  255. const char *name)
  256. {
  257. return 0;
  258. }
  259. static int dummy_inode_mkdir (struct inode *inode, struct dentry *dentry,
  260. int mask)
  261. {
  262. return 0;
  263. }
  264. static int dummy_inode_rmdir (struct inode *inode, struct dentry *dentry)
  265. {
  266. return 0;
  267. }
  268. static int dummy_inode_mknod (struct inode *inode, struct dentry *dentry,
  269. int mode, dev_t dev)
  270. {
  271. return 0;
  272. }
  273. static int dummy_inode_rename (struct inode *old_inode,
  274. struct dentry *old_dentry,
  275. struct inode *new_inode,
  276. struct dentry *new_dentry)
  277. {
  278. return 0;
  279. }
  280. static int dummy_inode_readlink (struct dentry *dentry)
  281. {
  282. return 0;
  283. }
  284. static int dummy_inode_follow_link (struct dentry *dentry,
  285. struct nameidata *nameidata)
  286. {
  287. return 0;
  288. }
  289. static int dummy_inode_permission (struct inode *inode, int mask, struct nameidata *nd)
  290. {
  291. return 0;
  292. }
  293. static int dummy_inode_setattr (struct dentry *dentry, struct iattr *iattr)
  294. {
  295. return 0;
  296. }
  297. static int dummy_inode_getattr (struct vfsmount *mnt, struct dentry *dentry)
  298. {
  299. return 0;
  300. }
  301. static void dummy_inode_delete (struct inode *ino)
  302. {
  303. return;
  304. }
  305. static int dummy_inode_setxattr (struct dentry *dentry, const char *name,
  306. const void *value, size_t size, int flags)
  307. {
  308. if (!strncmp(name, XATTR_SECURITY_PREFIX,
  309. sizeof(XATTR_SECURITY_PREFIX) - 1) &&
  310. !capable(CAP_SYS_ADMIN))
  311. return -EPERM;
  312. return 0;
  313. }
  314. static void dummy_inode_post_setxattr (struct dentry *dentry, const char *name,
  315. const void *value, size_t size,
  316. int flags)
  317. {
  318. }
  319. static int dummy_inode_getxattr (struct dentry *dentry, const char *name)
  320. {
  321. return 0;
  322. }
  323. static int dummy_inode_listxattr (struct dentry *dentry)
  324. {
  325. return 0;
  326. }
  327. static int dummy_inode_removexattr (struct dentry *dentry, const char *name)
  328. {
  329. if (!strncmp(name, XATTR_SECURITY_PREFIX,
  330. sizeof(XATTR_SECURITY_PREFIX) - 1) &&
  331. !capable(CAP_SYS_ADMIN))
  332. return -EPERM;
  333. return 0;
  334. }
  335. static int dummy_inode_need_killpriv(struct dentry *dentry)
  336. {
  337. return 0;
  338. }
  339. static int dummy_inode_killpriv(struct dentry *dentry)
  340. {
  341. return 0;
  342. }
  343. static int dummy_inode_getsecurity(const struct inode *inode, const char *name, void **buffer, bool alloc)
  344. {
  345. return -EOPNOTSUPP;
  346. }
  347. static int dummy_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags)
  348. {
  349. return -EOPNOTSUPP;
  350. }
  351. static int dummy_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size)
  352. {
  353. return 0;
  354. }
  355. static void dummy_inode_getsecid(const struct inode *inode, u32 *secid)
  356. {
  357. *secid = 0;
  358. }
  359. static int dummy_file_permission (struct file *file, int mask)
  360. {
  361. return 0;
  362. }
  363. static int dummy_file_alloc_security (struct file *file)
  364. {
  365. return 0;
  366. }
  367. static void dummy_file_free_security (struct file *file)
  368. {
  369. return;
  370. }
  371. static int dummy_file_ioctl (struct file *file, unsigned int command,
  372. unsigned long arg)
  373. {
  374. return 0;
  375. }
  376. static int dummy_file_mmap (struct file *file, unsigned long reqprot,
  377. unsigned long prot,
  378. unsigned long flags,
  379. unsigned long addr,
  380. unsigned long addr_only)
  381. {
  382. if ((addr < mmap_min_addr) && !capable(CAP_SYS_RAWIO))
  383. return -EACCES;
  384. return 0;
  385. }
  386. static int dummy_file_mprotect (struct vm_area_struct *vma,
  387. unsigned long reqprot,
  388. unsigned long prot)
  389. {
  390. return 0;
  391. }
  392. static int dummy_file_lock (struct file *file, unsigned int cmd)
  393. {
  394. return 0;
  395. }
  396. static int dummy_file_fcntl (struct file *file, unsigned int cmd,
  397. unsigned long arg)
  398. {
  399. return 0;
  400. }
  401. static int dummy_file_set_fowner (struct file *file)
  402. {
  403. return 0;
  404. }
  405. static int dummy_file_send_sigiotask (struct task_struct *tsk,
  406. struct fown_struct *fown, int sig)
  407. {
  408. return 0;
  409. }
  410. static int dummy_file_receive (struct file *file)
  411. {
  412. return 0;
  413. }
  414. static int dummy_dentry_open (struct file *file)
  415. {
  416. return 0;
  417. }
  418. static int dummy_task_create (unsigned long clone_flags)
  419. {
  420. return 0;
  421. }
  422. static int dummy_task_alloc_security (struct task_struct *p)
  423. {
  424. return 0;
  425. }
  426. static void dummy_task_free_security (struct task_struct *p)
  427. {
  428. return;
  429. }
  430. static int dummy_task_setuid (uid_t id0, uid_t id1, uid_t id2, int flags)
  431. {
  432. return 0;
  433. }
  434. static int dummy_task_post_setuid (uid_t id0, uid_t id1, uid_t id2, int flags)
  435. {
  436. dummy_capget(current, &current->cap_effective, &current->cap_inheritable, &current->cap_permitted);
  437. return 0;
  438. }
  439. static int dummy_task_setgid (gid_t id0, gid_t id1, gid_t id2, int flags)
  440. {
  441. return 0;
  442. }
  443. static int dummy_task_setpgid (struct task_struct *p, pid_t pgid)
  444. {
  445. return 0;
  446. }
  447. static int dummy_task_getpgid (struct task_struct *p)
  448. {
  449. return 0;
  450. }
  451. static int dummy_task_getsid (struct task_struct *p)
  452. {
  453. return 0;
  454. }
  455. static void dummy_task_getsecid (struct task_struct *p, u32 *secid)
  456. {
  457. *secid = 0;
  458. }
  459. static int dummy_task_setgroups (struct group_info *group_info)
  460. {
  461. return 0;
  462. }
  463. static int dummy_task_setnice (struct task_struct *p, int nice)
  464. {
  465. return 0;
  466. }
  467. static int dummy_task_setioprio (struct task_struct *p, int ioprio)
  468. {
  469. return 0;
  470. }
  471. static int dummy_task_getioprio (struct task_struct *p)
  472. {
  473. return 0;
  474. }
  475. static int dummy_task_setrlimit (unsigned int resource, struct rlimit *new_rlim)
  476. {
  477. return 0;
  478. }
  479. static int dummy_task_setscheduler (struct task_struct *p, int policy,
  480. struct sched_param *lp)
  481. {
  482. return 0;
  483. }
  484. static int dummy_task_getscheduler (struct task_struct *p)
  485. {
  486. return 0;
  487. }
  488. static int dummy_task_movememory (struct task_struct *p)
  489. {
  490. return 0;
  491. }
  492. static int dummy_task_wait (struct task_struct *p)
  493. {
  494. return 0;
  495. }
  496. static int dummy_task_kill (struct task_struct *p, struct siginfo *info,
  497. int sig, u32 secid)
  498. {
  499. return 0;
  500. }
  501. static int dummy_task_prctl (int option, unsigned long arg2, unsigned long arg3,
  502. unsigned long arg4, unsigned long arg5, long *rc_p)
  503. {
  504. switch (option) {
  505. case PR_CAPBSET_READ:
  506. *rc_p = (cap_valid(arg2) ? 1 : -EINVAL);
  507. break;
  508. case PR_GET_KEEPCAPS:
  509. *rc_p = issecure(SECURE_KEEP_CAPS);
  510. break;
  511. case PR_SET_KEEPCAPS:
  512. if (arg2 > 1)
  513. *rc_p = -EINVAL;
  514. else if (arg2)
  515. current->securebits |= issecure_mask(SECURE_KEEP_CAPS);
  516. else
  517. current->securebits &=
  518. ~issecure_mask(SECURE_KEEP_CAPS);
  519. break;
  520. default:
  521. return 0;
  522. }
  523. return 1;
  524. }
  525. static void dummy_task_reparent_to_init (struct task_struct *p)
  526. {
  527. p->euid = p->fsuid = 0;
  528. return;
  529. }
  530. static void dummy_task_to_inode(struct task_struct *p, struct inode *inode)
  531. { }
  532. static int dummy_ipc_permission (struct kern_ipc_perm *ipcp, short flag)
  533. {
  534. return 0;
  535. }
  536. static void dummy_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid)
  537. {
  538. *secid = 0;
  539. }
  540. static int dummy_msg_msg_alloc_security (struct msg_msg *msg)
  541. {
  542. return 0;
  543. }
  544. static void dummy_msg_msg_free_security (struct msg_msg *msg)
  545. {
  546. return;
  547. }
  548. static int dummy_msg_queue_alloc_security (struct msg_queue *msq)
  549. {
  550. return 0;
  551. }
  552. static void dummy_msg_queue_free_security (struct msg_queue *msq)
  553. {
  554. return;
  555. }
  556. static int dummy_msg_queue_associate (struct msg_queue *msq,
  557. int msqflg)
  558. {
  559. return 0;
  560. }
  561. static int dummy_msg_queue_msgctl (struct msg_queue *msq, int cmd)
  562. {
  563. return 0;
  564. }
  565. static int dummy_msg_queue_msgsnd (struct msg_queue *msq, struct msg_msg *msg,
  566. int msgflg)
  567. {
  568. return 0;
  569. }
  570. static int dummy_msg_queue_msgrcv (struct msg_queue *msq, struct msg_msg *msg,
  571. struct task_struct *target, long type,
  572. int mode)
  573. {
  574. return 0;
  575. }
  576. static int dummy_shm_alloc_security (struct shmid_kernel *shp)
  577. {
  578. return 0;
  579. }
  580. static void dummy_shm_free_security (struct shmid_kernel *shp)
  581. {
  582. return;
  583. }
  584. static int dummy_shm_associate (struct shmid_kernel *shp, int shmflg)
  585. {
  586. return 0;
  587. }
  588. static int dummy_shm_shmctl (struct shmid_kernel *shp, int cmd)
  589. {
  590. return 0;
  591. }
  592. static int dummy_shm_shmat (struct shmid_kernel *shp, char __user *shmaddr,
  593. int shmflg)
  594. {
  595. return 0;
  596. }
  597. static int dummy_sem_alloc_security (struct sem_array *sma)
  598. {
  599. return 0;
  600. }
  601. static void dummy_sem_free_security (struct sem_array *sma)
  602. {
  603. return;
  604. }
  605. static int dummy_sem_associate (struct sem_array *sma, int semflg)
  606. {
  607. return 0;
  608. }
  609. static int dummy_sem_semctl (struct sem_array *sma, int cmd)
  610. {
  611. return 0;
  612. }
  613. static int dummy_sem_semop (struct sem_array *sma,
  614. struct sembuf *sops, unsigned nsops, int alter)
  615. {
  616. return 0;
  617. }
  618. static int dummy_netlink_send (struct sock *sk, struct sk_buff *skb)
  619. {
  620. NETLINK_CB(skb).eff_cap = current->cap_effective;
  621. return 0;
  622. }
  623. static int dummy_netlink_recv (struct sk_buff *skb, int cap)
  624. {
  625. if (!cap_raised (NETLINK_CB (skb).eff_cap, cap))
  626. return -EPERM;
  627. return 0;
  628. }
  629. #ifdef CONFIG_SECURITY_NETWORK
  630. static int dummy_unix_stream_connect (struct socket *sock,
  631. struct socket *other,
  632. struct sock *newsk)
  633. {
  634. return 0;
  635. }
  636. static int dummy_unix_may_send (struct socket *sock,
  637. struct socket *other)
  638. {
  639. return 0;
  640. }
  641. static int dummy_socket_create (int family, int type,
  642. int protocol, int kern)
  643. {
  644. return 0;
  645. }
  646. static int dummy_socket_post_create (struct socket *sock, int family, int type,
  647. int protocol, int kern)
  648. {
  649. return 0;
  650. }
  651. static int dummy_socket_bind (struct socket *sock, struct sockaddr *address,
  652. int addrlen)
  653. {
  654. return 0;
  655. }
  656. static int dummy_socket_connect (struct socket *sock, struct sockaddr *address,
  657. int addrlen)
  658. {
  659. return 0;
  660. }
  661. static int dummy_socket_listen (struct socket *sock, int backlog)
  662. {
  663. return 0;
  664. }
  665. static int dummy_socket_accept (struct socket *sock, struct socket *newsock)
  666. {
  667. return 0;
  668. }
  669. static void dummy_socket_post_accept (struct socket *sock,
  670. struct socket *newsock)
  671. {
  672. return;
  673. }
  674. static int dummy_socket_sendmsg (struct socket *sock, struct msghdr *msg,
  675. int size)
  676. {
  677. return 0;
  678. }
  679. static int dummy_socket_recvmsg (struct socket *sock, struct msghdr *msg,
  680. int size, int flags)
  681. {
  682. return 0;
  683. }
  684. static int dummy_socket_getsockname (struct socket *sock)
  685. {
  686. return 0;
  687. }
  688. static int dummy_socket_getpeername (struct socket *sock)
  689. {
  690. return 0;
  691. }
  692. static int dummy_socket_setsockopt (struct socket *sock, int level, int optname)
  693. {
  694. return 0;
  695. }
  696. static int dummy_socket_getsockopt (struct socket *sock, int level, int optname)
  697. {
  698. return 0;
  699. }
  700. static int dummy_socket_shutdown (struct socket *sock, int how)
  701. {
  702. return 0;
  703. }
  704. static int dummy_socket_sock_rcv_skb (struct sock *sk, struct sk_buff *skb)
  705. {
  706. return 0;
  707. }
  708. static int dummy_socket_getpeersec_stream(struct socket *sock, char __user *optval,
  709. int __user *optlen, unsigned len)
  710. {
  711. return -ENOPROTOOPT;
  712. }
  713. static int dummy_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb, u32 *secid)
  714. {
  715. return -ENOPROTOOPT;
  716. }
  717. static inline int dummy_sk_alloc_security (struct sock *sk, int family, gfp_t priority)
  718. {
  719. return 0;
  720. }
  721. static inline void dummy_sk_free_security (struct sock *sk)
  722. {
  723. }
  724. static inline void dummy_sk_clone_security (const struct sock *sk, struct sock *newsk)
  725. {
  726. }
  727. static inline void dummy_sk_getsecid(struct sock *sk, u32 *secid)
  728. {
  729. }
  730. static inline void dummy_sock_graft(struct sock* sk, struct socket *parent)
  731. {
  732. }
  733. static inline int dummy_inet_conn_request(struct sock *sk,
  734. struct sk_buff *skb, struct request_sock *req)
  735. {
  736. return 0;
  737. }
  738. static inline void dummy_inet_csk_clone(struct sock *newsk,
  739. const struct request_sock *req)
  740. {
  741. }
  742. static inline void dummy_inet_conn_established(struct sock *sk,
  743. struct sk_buff *skb)
  744. {
  745. }
  746. static inline void dummy_req_classify_flow(const struct request_sock *req,
  747. struct flowi *fl)
  748. {
  749. }
  750. #endif /* CONFIG_SECURITY_NETWORK */
  751. #ifdef CONFIG_SECURITY_NETWORK_XFRM
  752. static int dummy_xfrm_policy_alloc_security(struct xfrm_sec_ctx **ctxp,
  753. struct xfrm_user_sec_ctx *sec_ctx)
  754. {
  755. return 0;
  756. }
  757. static inline int dummy_xfrm_policy_clone_security(struct xfrm_sec_ctx *old_ctx,
  758. struct xfrm_sec_ctx **new_ctxp)
  759. {
  760. return 0;
  761. }
  762. static void dummy_xfrm_policy_free_security(struct xfrm_sec_ctx *ctx)
  763. {
  764. }
  765. static int dummy_xfrm_policy_delete_security(struct xfrm_sec_ctx *ctx)
  766. {
  767. return 0;
  768. }
  769. static int dummy_xfrm_state_alloc_security(struct xfrm_state *x,
  770. struct xfrm_user_sec_ctx *sec_ctx, u32 secid)
  771. {
  772. return 0;
  773. }
  774. static void dummy_xfrm_state_free_security(struct xfrm_state *x)
  775. {
  776. }
  777. static int dummy_xfrm_state_delete_security(struct xfrm_state *x)
  778. {
  779. return 0;
  780. }
  781. static int dummy_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx,
  782. u32 sk_sid, u8 dir)
  783. {
  784. return 0;
  785. }
  786. static int dummy_xfrm_state_pol_flow_match(struct xfrm_state *x,
  787. struct xfrm_policy *xp, struct flowi *fl)
  788. {
  789. return 1;
  790. }
  791. static int dummy_xfrm_decode_session(struct sk_buff *skb, u32 *fl, int ckall)
  792. {
  793. return 0;
  794. }
  795. #endif /* CONFIG_SECURITY_NETWORK_XFRM */
  796. static int dummy_register_security (const char *name, struct security_operations *ops)
  797. {
  798. return -EINVAL;
  799. }
  800. static void dummy_d_instantiate (struct dentry *dentry, struct inode *inode)
  801. {
  802. return;
  803. }
  804. static int dummy_getprocattr(struct task_struct *p, char *name, char **value)
  805. {
  806. return -EINVAL;
  807. }
  808. static int dummy_setprocattr(struct task_struct *p, char *name, void *value, size_t size)
  809. {
  810. return -EINVAL;
  811. }
  812. static int dummy_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
  813. {
  814. return -EOPNOTSUPP;
  815. }
  816. static int dummy_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid)
  817. {
  818. return -EOPNOTSUPP;
  819. }
  820. static void dummy_release_secctx(char *secdata, u32 seclen)
  821. {
  822. }
  823. #ifdef CONFIG_KEYS
  824. static inline int dummy_key_alloc(struct key *key, struct task_struct *ctx,
  825. unsigned long flags)
  826. {
  827. return 0;
  828. }
  829. static inline void dummy_key_free(struct key *key)
  830. {
  831. }
  832. static inline int dummy_key_permission(key_ref_t key_ref,
  833. struct task_struct *context,
  834. key_perm_t perm)
  835. {
  836. return 0;
  837. }
  838. static int dummy_key_getsecurity(struct key *key, char **_buffer)
  839. {
  840. *_buffer = NULL;
  841. return 0;
  842. }
  843. #endif /* CONFIG_KEYS */
  844. #ifdef CONFIG_AUDIT
  845. static inline int dummy_audit_rule_init(u32 field, u32 op, char *rulestr,
  846. void **lsmrule)
  847. {
  848. return 0;
  849. }
  850. static inline int dummy_audit_rule_known(struct audit_krule *krule)
  851. {
  852. return 0;
  853. }
  854. static inline int dummy_audit_rule_match(u32 secid, u32 field, u32 op,
  855. void *lsmrule,
  856. struct audit_context *actx)
  857. {
  858. return 0;
  859. }
  860. static inline void dummy_audit_rule_free(void *lsmrule)
  861. { }
  862. #endif /* CONFIG_AUDIT */
  863. struct security_operations dummy_security_ops = {
  864. .name = "dummy",
  865. };
  866. #define set_to_dummy_if_null(ops, function) \
  867. do { \
  868. if (!ops->function) { \
  869. ops->function = dummy_##function; \
  870. pr_debug("Had to override the " #function \
  871. " security operation with the dummy one.\n");\
  872. } \
  873. } while (0)
  874. void security_fixup_ops (struct security_operations *ops)
  875. {
  876. set_to_dummy_if_null(ops, ptrace);
  877. set_to_dummy_if_null(ops, capget);
  878. set_to_dummy_if_null(ops, capset_check);
  879. set_to_dummy_if_null(ops, capset_set);
  880. set_to_dummy_if_null(ops, acct);
  881. set_to_dummy_if_null(ops, capable);
  882. set_to_dummy_if_null(ops, quotactl);
  883. set_to_dummy_if_null(ops, quota_on);
  884. set_to_dummy_if_null(ops, sysctl);
  885. set_to_dummy_if_null(ops, syslog);
  886. set_to_dummy_if_null(ops, settime);
  887. set_to_dummy_if_null(ops, vm_enough_memory);
  888. set_to_dummy_if_null(ops, bprm_alloc_security);
  889. set_to_dummy_if_null(ops, bprm_free_security);
  890. set_to_dummy_if_null(ops, bprm_apply_creds);
  891. set_to_dummy_if_null(ops, bprm_post_apply_creds);
  892. set_to_dummy_if_null(ops, bprm_set_security);
  893. set_to_dummy_if_null(ops, bprm_check_security);
  894. set_to_dummy_if_null(ops, bprm_secureexec);
  895. set_to_dummy_if_null(ops, sb_alloc_security);
  896. set_to_dummy_if_null(ops, sb_free_security);
  897. set_to_dummy_if_null(ops, sb_copy_data);
  898. set_to_dummy_if_null(ops, sb_kern_mount);
  899. set_to_dummy_if_null(ops, sb_show_options);
  900. set_to_dummy_if_null(ops, sb_statfs);
  901. set_to_dummy_if_null(ops, sb_mount);
  902. set_to_dummy_if_null(ops, sb_check_sb);
  903. set_to_dummy_if_null(ops, sb_umount);
  904. set_to_dummy_if_null(ops, sb_umount_close);
  905. set_to_dummy_if_null(ops, sb_umount_busy);
  906. set_to_dummy_if_null(ops, sb_post_remount);
  907. set_to_dummy_if_null(ops, sb_post_addmount);
  908. set_to_dummy_if_null(ops, sb_pivotroot);
  909. set_to_dummy_if_null(ops, sb_post_pivotroot);
  910. set_to_dummy_if_null(ops, sb_set_mnt_opts);
  911. set_to_dummy_if_null(ops, sb_clone_mnt_opts);
  912. set_to_dummy_if_null(ops, sb_parse_opts_str);
  913. set_to_dummy_if_null(ops, inode_alloc_security);
  914. set_to_dummy_if_null(ops, inode_free_security);
  915. set_to_dummy_if_null(ops, inode_init_security);
  916. set_to_dummy_if_null(ops, inode_create);
  917. set_to_dummy_if_null(ops, inode_link);
  918. set_to_dummy_if_null(ops, inode_unlink);
  919. set_to_dummy_if_null(ops, inode_symlink);
  920. set_to_dummy_if_null(ops, inode_mkdir);
  921. set_to_dummy_if_null(ops, inode_rmdir);
  922. set_to_dummy_if_null(ops, inode_mknod);
  923. set_to_dummy_if_null(ops, inode_rename);
  924. set_to_dummy_if_null(ops, inode_readlink);
  925. set_to_dummy_if_null(ops, inode_follow_link);
  926. set_to_dummy_if_null(ops, inode_permission);
  927. set_to_dummy_if_null(ops, inode_setattr);
  928. set_to_dummy_if_null(ops, inode_getattr);
  929. set_to_dummy_if_null(ops, inode_delete);
  930. set_to_dummy_if_null(ops, inode_setxattr);
  931. set_to_dummy_if_null(ops, inode_post_setxattr);
  932. set_to_dummy_if_null(ops, inode_getxattr);
  933. set_to_dummy_if_null(ops, inode_listxattr);
  934. set_to_dummy_if_null(ops, inode_removexattr);
  935. set_to_dummy_if_null(ops, inode_need_killpriv);
  936. set_to_dummy_if_null(ops, inode_killpriv);
  937. set_to_dummy_if_null(ops, inode_getsecurity);
  938. set_to_dummy_if_null(ops, inode_setsecurity);
  939. set_to_dummy_if_null(ops, inode_listsecurity);
  940. set_to_dummy_if_null(ops, inode_getsecid);
  941. set_to_dummy_if_null(ops, file_permission);
  942. set_to_dummy_if_null(ops, file_alloc_security);
  943. set_to_dummy_if_null(ops, file_free_security);
  944. set_to_dummy_if_null(ops, file_ioctl);
  945. set_to_dummy_if_null(ops, file_mmap);
  946. set_to_dummy_if_null(ops, file_mprotect);
  947. set_to_dummy_if_null(ops, file_lock);
  948. set_to_dummy_if_null(ops, file_fcntl);
  949. set_to_dummy_if_null(ops, file_set_fowner);
  950. set_to_dummy_if_null(ops, file_send_sigiotask);
  951. set_to_dummy_if_null(ops, file_receive);
  952. set_to_dummy_if_null(ops, dentry_open);
  953. set_to_dummy_if_null(ops, task_create);
  954. set_to_dummy_if_null(ops, task_alloc_security);
  955. set_to_dummy_if_null(ops, task_free_security);
  956. set_to_dummy_if_null(ops, task_setuid);
  957. set_to_dummy_if_null(ops, task_post_setuid);
  958. set_to_dummy_if_null(ops, task_setgid);
  959. set_to_dummy_if_null(ops, task_setpgid);
  960. set_to_dummy_if_null(ops, task_getpgid);
  961. set_to_dummy_if_null(ops, task_getsid);
  962. set_to_dummy_if_null(ops, task_getsecid);
  963. set_to_dummy_if_null(ops, task_setgroups);
  964. set_to_dummy_if_null(ops, task_setnice);
  965. set_to_dummy_if_null(ops, task_setioprio);
  966. set_to_dummy_if_null(ops, task_getioprio);
  967. set_to_dummy_if_null(ops, task_setrlimit);
  968. set_to_dummy_if_null(ops, task_setscheduler);
  969. set_to_dummy_if_null(ops, task_getscheduler);
  970. set_to_dummy_if_null(ops, task_movememory);
  971. set_to_dummy_if_null(ops, task_wait);
  972. set_to_dummy_if_null(ops, task_kill);
  973. set_to_dummy_if_null(ops, task_prctl);
  974. set_to_dummy_if_null(ops, task_reparent_to_init);
  975. set_to_dummy_if_null(ops, task_to_inode);
  976. set_to_dummy_if_null(ops, ipc_permission);
  977. set_to_dummy_if_null(ops, ipc_getsecid);
  978. set_to_dummy_if_null(ops, msg_msg_alloc_security);
  979. set_to_dummy_if_null(ops, msg_msg_free_security);
  980. set_to_dummy_if_null(ops, msg_queue_alloc_security);
  981. set_to_dummy_if_null(ops, msg_queue_free_security);
  982. set_to_dummy_if_null(ops, msg_queue_associate);
  983. set_to_dummy_if_null(ops, msg_queue_msgctl);
  984. set_to_dummy_if_null(ops, msg_queue_msgsnd);
  985. set_to_dummy_if_null(ops, msg_queue_msgrcv);
  986. set_to_dummy_if_null(ops, shm_alloc_security);
  987. set_to_dummy_if_null(ops, shm_free_security);
  988. set_to_dummy_if_null(ops, shm_associate);
  989. set_to_dummy_if_null(ops, shm_shmctl);
  990. set_to_dummy_if_null(ops, shm_shmat);
  991. set_to_dummy_if_null(ops, sem_alloc_security);
  992. set_to_dummy_if_null(ops, sem_free_security);
  993. set_to_dummy_if_null(ops, sem_associate);
  994. set_to_dummy_if_null(ops, sem_semctl);
  995. set_to_dummy_if_null(ops, sem_semop);
  996. set_to_dummy_if_null(ops, netlink_send);
  997. set_to_dummy_if_null(ops, netlink_recv);
  998. set_to_dummy_if_null(ops, register_security);
  999. set_to_dummy_if_null(ops, d_instantiate);
  1000. set_to_dummy_if_null(ops, getprocattr);
  1001. set_to_dummy_if_null(ops, setprocattr);
  1002. set_to_dummy_if_null(ops, secid_to_secctx);
  1003. set_to_dummy_if_null(ops, secctx_to_secid);
  1004. set_to_dummy_if_null(ops, release_secctx);
  1005. #ifdef CONFIG_SECURITY_NETWORK
  1006. set_to_dummy_if_null(ops, unix_stream_connect);
  1007. set_to_dummy_if_null(ops, unix_may_send);
  1008. set_to_dummy_if_null(ops, socket_create);
  1009. set_to_dummy_if_null(ops, socket_post_create);
  1010. set_to_dummy_if_null(ops, socket_bind);
  1011. set_to_dummy_if_null(ops, socket_connect);
  1012. set_to_dummy_if_null(ops, socket_listen);
  1013. set_to_dummy_if_null(ops, socket_accept);
  1014. set_to_dummy_if_null(ops, socket_post_accept);
  1015. set_to_dummy_if_null(ops, socket_sendmsg);
  1016. set_to_dummy_if_null(ops, socket_recvmsg);
  1017. set_to_dummy_if_null(ops, socket_getsockname);
  1018. set_to_dummy_if_null(ops, socket_getpeername);
  1019. set_to_dummy_if_null(ops, socket_setsockopt);
  1020. set_to_dummy_if_null(ops, socket_getsockopt);
  1021. set_to_dummy_if_null(ops, socket_shutdown);
  1022. set_to_dummy_if_null(ops, socket_sock_rcv_skb);
  1023. set_to_dummy_if_null(ops, socket_getpeersec_stream);
  1024. set_to_dummy_if_null(ops, socket_getpeersec_dgram);
  1025. set_to_dummy_if_null(ops, sk_alloc_security);
  1026. set_to_dummy_if_null(ops, sk_free_security);
  1027. set_to_dummy_if_null(ops, sk_clone_security);
  1028. set_to_dummy_if_null(ops, sk_getsecid);
  1029. set_to_dummy_if_null(ops, sock_graft);
  1030. set_to_dummy_if_null(ops, inet_conn_request);
  1031. set_to_dummy_if_null(ops, inet_csk_clone);
  1032. set_to_dummy_if_null(ops, inet_conn_established);
  1033. set_to_dummy_if_null(ops, req_classify_flow);
  1034. #endif /* CONFIG_SECURITY_NETWORK */
  1035. #ifdef CONFIG_SECURITY_NETWORK_XFRM
  1036. set_to_dummy_if_null(ops, xfrm_policy_alloc_security);
  1037. set_to_dummy_if_null(ops, xfrm_policy_clone_security);
  1038. set_to_dummy_if_null(ops, xfrm_policy_free_security);
  1039. set_to_dummy_if_null(ops, xfrm_policy_delete_security);
  1040. set_to_dummy_if_null(ops, xfrm_state_alloc_security);
  1041. set_to_dummy_if_null(ops, xfrm_state_free_security);
  1042. set_to_dummy_if_null(ops, xfrm_state_delete_security);
  1043. set_to_dummy_if_null(ops, xfrm_policy_lookup);
  1044. set_to_dummy_if_null(ops, xfrm_state_pol_flow_match);
  1045. set_to_dummy_if_null(ops, xfrm_decode_session);
  1046. #endif /* CONFIG_SECURITY_NETWORK_XFRM */
  1047. #ifdef CONFIG_KEYS
  1048. set_to_dummy_if_null(ops, key_alloc);
  1049. set_to_dummy_if_null(ops, key_free);
  1050. set_to_dummy_if_null(ops, key_permission);
  1051. set_to_dummy_if_null(ops, key_getsecurity);
  1052. #endif /* CONFIG_KEYS */
  1053. #ifdef CONFIG_AUDIT
  1054. set_to_dummy_if_null(ops, audit_rule_init);
  1055. set_to_dummy_if_null(ops, audit_rule_known);
  1056. set_to_dummy_if_null(ops, audit_rule_match);
  1057. set_to_dummy_if_null(ops, audit_rule_free);
  1058. #endif
  1059. }