security/dummy.c

   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
  15 #undef DEBUG
  16
  17 #include <linux/capability.h>
  18 #include <linux/config.h>
  19 #include <linux/module.h>
  20 #include <linux/kernel.h>
  21 #include <linux/mman.h>
  22 #include <linux/pagemap.h>
  23 #include <linux/swap.h>
  24 #include <linux/security.h>
  25 #include <linux/skbuff.h>
  26 #include <linux/netlink.h>
  27 #include <net/sock.h>
  28 #include <linux/xattr.h>
  29 #include <linux/hugetlb.h>
  30 #include <linux/ptrace.h>
  31 #include <linux/file.h>
  32
  33 static int dummy_ptrace (struct task_struct *parent, struct task_struct *child)
  34 {
  35         return 0;
  36 }
  37
  38 static int dummy_capget (struct task_struct *target, kernel_cap_t * effective,
  39                          kernel_cap_t * inheritable, kernel_cap_t * permitted)
  40 {
  41         *effective = *inheritable = *permitted = 0;
  42         if (!issecure(SECURE_NOROOT)) {
  43                 if (target->euid == 0) {
  44                         *permitted |= (~0 & ~CAP_FS_MASK);
  45                         *effective |= (~0 & ~CAP_TO_MASK(CAP_SETPCAP) & ~CAP_FS_MASK);
  46                 }
  47                 if (target->fsuid == 0) {
  48                         *permitted |= CAP_FS_MASK;
  49                         *effective |= CAP_FS_MASK;
  50                 }
  51         }
  52         return 0;
  53 }
  54
  55 static int dummy_capset_check (struct task_struct *target,
  56                                kernel_cap_t * effective,
  57                                kernel_cap_t * inheritable,
  58                                kernel_cap_t * permitted)
  59 {
  60         return -EPERM;
  61 }
  62
  63 static void dummy_capset_set (struct task_struct *target,
  64                               kernel_cap_t * effective,
  65                               kernel_cap_t * inheritable,
  66                               kernel_cap_t * permitted)
  67 {
  68         return;
  69 }
  70
  71 static int dummy_acct (struct file *file)
  72 {
  73         return 0;
  74 }
  75
  76 static int dummy_capable (struct task_struct *tsk, int cap)
  77 {
  78         if (cap_raised (tsk->cap_effective, cap))
  79                 return 0;
  80         return -EPERM;
  81 }
  82
  83 static int dummy_sysctl (ctl_table * table, int op)
  84 {
  85         return 0;
  86 }
  87
  88 static int dummy_quotactl (int cmds, int type, int id, struct super_block *sb)
  89 {
  90         return 0;
  91 }
  92
  93 static int dummy_quota_on (struct dentry *dentry)
  94 {
  95         return 0;
  96 }
  97
  98 static int dummy_syslog (int type)
  99 {
 100         if ((type != 3 && type != 10) && current->euid)
 101                 return -EPERM;
 102         return 0;
 103 }
 104
 105 static int dummy_settime(struct timespec *ts, struct timezone *tz)
 106 {
 107         if (!capable(CAP_SYS_TIME))
 108                 return -EPERM;
 109         return 0;
 110 }
 111
 112 static int dummy_vm_enough_memory(long pages)
 113 {
 114         int cap_sys_admin = 0;
 115
 116         if (dummy_capable(current, CAP_SYS_ADMIN) == 0)
 117                 cap_sys_admin = 1;
 118         return __vm_enough_memory(pages, cap_sys_admin);
 119 }
 120
 121 static int dummy_bprm_alloc_security (struct linux_binprm *bprm)
 122 {
 123         return 0;
 124 }
 125
 126 static void dummy_bprm_free_security (struct linux_binprm *bprm)
 127 {
 128         return;
 129 }
 130
 131 static void dummy_bprm_apply_creds (struct linux_binprm *bprm, int unsafe)
 132 {
 133         if (bprm->e_uid != current->uid || bprm->e_gid != current->gid) {
 134                 current->mm->dumpable = suid_dumpable;
 135
 136                 if ((unsafe & ~LSM_UNSAFE_PTRACE_CAP) && !capable(CAP_SETUID)) {
 137                         bprm->e_uid = current->uid;
 138                         bprm->e_gid = current->gid;
 139                 }
 140         }
 141
 142         current->suid = current->euid = current->fsuid = bprm->e_uid;
 143         current->sgid = current->egid = current->fsgid = bprm->e_gid;
 144
 145         dummy_capget(current, &current->cap_effective, &current->cap_inheritable, &current->cap_permitted);
 146 }
 147
 148 static void dummy_bprm_post_apply_creds (struct linux_binprm *bprm)
 149 {
 150         return;
 151 }
 152
 153 static int dummy_bprm_set_security (struct linux_binprm *bprm)
 154 {
 155         return 0;
 156 }
 157
 158 static int dummy_bprm_check_security (struct linux_binprm *bprm)
 159 {
 160         return 0;
 161 }
 162
 163 static int dummy_bprm_secureexec (struct linux_binprm *bprm)
 164 {
 165         /* The new userland will simply use the value provided
 166            in the AT_SECURE field to decide whether secure mode
 167            is required.  Hence, this logic is required to preserve
 168            the legacy decision algorithm used by the old userland. */
 169         return (current->euid != current->uid ||
 170                 current->egid != current->gid);
 171 }
 172
 173 static int dummy_sb_alloc_security (struct super_block *sb)
 174 {
 175         return 0;
 176 }
 177
 178 static void dummy_sb_free_security (struct super_block *sb)
 179 {
 180         return;
 181 }
 182
 183 static int dummy_sb_copy_data (struct file_system_type *type,
 184                                void *orig, void *copy)
 185 {
 186         return 0;
 187 }
 188
 189 static int dummy_sb_kern_mount (struct super_block *sb, void *data)
 190 {
 191         return 0;
 192 }
 193
 194 static int dummy_sb_statfs (struct dentry *dentry)
 195 {
 196         return 0;
 197 }
 198
 199 static int dummy_sb_mount (char *dev_name, struct nameidata *nd, char *type,
 200                            unsigned long flags, void *data)
 201 {
 202         return 0;
 203 }
 204
 205 static int dummy_sb_check_sb (struct vfsmount *mnt, struct nameidata *nd)
 206 {
 207         return 0;
 208 }
 209
 210 static int dummy_sb_umount (struct vfsmount *mnt, int flags)
 211 {
 212         return 0;
 213 }
 214
 215 static void dummy_sb_umount_close (struct vfsmount *mnt)
 216 {
 217         return;
 218 }
 219
 220 static void dummy_sb_umount_busy (struct vfsmount *mnt)
 221 {
 222         return;
 223 }
 224
 225 static void dummy_sb_post_remount (struct vfsmount *mnt, unsigned long flags,
 226                                    void *data)
 227 {
 228         return;
 229 }
 230
 231
 232 static void dummy_sb_post_mountroot (void)
 233 {
 234         return;
 235 }
 236
 237 static void dummy_sb_post_addmount (struct vfsmount *mnt, struct nameidata *nd)
 238 {
 239         return;
 240 }
 241
 242 static int dummy_sb_pivotroot (struct nameidata *old_nd, struct nameidata *new_nd)
 243 {
 244         return 0;
 245 }
 246
 247 static void dummy_sb_post_pivotroot (struct nameidata *old_nd, struct nameidata *new_nd)
 248 {
 249         return;
 250 }
 251
 252 static int dummy_inode_alloc_security (struct inode *inode)
 253 {
 254         return 0;
 255 }
 256
 257 static void dummy_inode_free_security (struct inode *inode)
 258 {
 259         return;
 260 }
 261
 262 static int dummy_inode_init_security (struct inode *inode, struct inode *dir,
 263                                       char **name, void **value, size_t *len)
 264 {
 265         return -EOPNOTSUPP;
 266 }
 267
 268 static int dummy_inode_create (struct inode *inode, struct dentry *dentry,
 269                                int mask)
 270 {
 271         return 0;
 272 }
 273
 274 static int dummy_inode_link (struct dentry *old_dentry, struct inode *inode,
 275                              struct dentry *new_dentry)
 276 {
 277         return 0;
 278 }
 279
 280 static int dummy_inode_unlink (struct inode *inode, struct dentry *dentry)
 281 {
 282         return 0;
 283 }
 284
 285 static int dummy_inode_symlink (struct inode *inode, struct dentry *dentry,
 286                                 const char *name)
 287 {
 288         return 0;
 289 }
 290
 291 static int dummy_inode_mkdir (struct inode *inode, struct dentry *dentry,
 292                               int mask)
 293 {
 294         return 0;
 295 }
 296
 297 static int dummy_inode_rmdir (struct inode *inode, struct dentry *dentry)
 298 {
 299         return 0;
 300 }
 301
 302 static int dummy_inode_mknod (struct inode *inode, struct dentry *dentry,
 303                               int mode, dev_t dev)
 304 {
 305         return 0;
 306 }
 307
 308 static int dummy_inode_rename (struct inode *old_inode,
 309                                struct dentry *old_dentry,
 310                                struct inode *new_inode,
 311                                struct dentry *new_dentry)
 312 {
 313         return 0;
 314 }
 315
 316 static int dummy_inode_readlink (struct dentry *dentry)
 317 {
 318         return 0;
 319 }
 320
 321 static int dummy_inode_follow_link (struct dentry *dentry,
 322                                     struct nameidata *nameidata)
 323 {
 324         return 0;
 325 }
 326
 327 static int dummy_inode_permission (struct inode *inode, int mask, struct nameidata *nd)
 328 {
 329         return 0;
 330 }
 331
 332 static int dummy_inode_setattr (struct dentry *dentry, struct iattr *iattr)
 333 {
 334         return 0;
 335 }
 336
 337 static int dummy_inode_getattr (struct vfsmount *mnt, struct dentry *dentry)
 338 {
 339         return 0;
 340 }
 341
 342 static void dummy_inode_delete (struct inode *ino)
 343 {
 344         return;
 345 }
 346
 347 static int dummy_inode_setxattr (struct dentry *dentry, char *name, void *value,
 348                                 size_t size, int flags)
 349 {
 350         if (!strncmp(name, XATTR_SECURITY_PREFIX,
 351                      sizeof(XATTR_SECURITY_PREFIX) - 1) &&
 352             !capable(CAP_SYS_ADMIN))
 353                 return -EPERM;
 354         return 0;
 355 }
 356
 357 static void dummy_inode_post_setxattr (struct dentry *dentry, char *name, void *value,
 358                                        size_t size, int flags)
 359 {
 360 }
 361
 362 static int dummy_inode_getxattr (struct dentry *dentry, char *name)
 363 {
 364         return 0;
 365 }
 366
 367 static int dummy_inode_listxattr (struct dentry *dentry)
 368 {
 369         return 0;
 370 }
 371
 372 static int dummy_inode_removexattr (struct dentry *dentry, char *name)
 373 {
 374         if (!strncmp(name, XATTR_SECURITY_PREFIX,
 375                      sizeof(XATTR_SECURITY_PREFIX) - 1) &&
 376             !capable(CAP_SYS_ADMIN))
 377                 return -EPERM;
 378         return 0;
 379 }
 380
 381 static int dummy_inode_getsecurity(const struct inode *inode, const char *name, void *buffer, size_t size, int err)
 382 {
 383         return -EOPNOTSUPP;
 384 }
 385
 386 static int dummy_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags)
 387 {
 388         return -EOPNOTSUPP;
 389 }
 390
 391 static int dummy_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size)
 392 {
 393         return 0;
 394 }
 395
 396 static const char *dummy_inode_xattr_getsuffix(void)
 397 {
 398         return NULL;
 399 }
 400
 401 static int dummy_file_permission (struct file *file, int mask)
 402 {
 403         return 0;
 404 }
 405
 406 static int dummy_file_alloc_security (struct file *file)
 407 {
 408         return 0;
 409 }
 410
 411 static void dummy_file_free_security (struct file *file)
 412 {
 413         return;
 414 }
 415
 416 static int dummy_file_ioctl (struct file *file, unsigned int command,
 417                              unsigned long arg)
 418 {
 419         return 0;
 420 }
 421
 422 static int dummy_file_mmap (struct file *file, unsigned long reqprot,
 423                             unsigned long prot,
 424                             unsigned long flags)
 425 {
 426         return 0;
 427 }
 428
 429 static int dummy_file_mprotect (struct vm_area_struct *vma,
 430                                 unsigned long reqprot,
 431                                 unsigned long prot)
 432 {
 433         return 0;
 434 }
 435
 436 static int dummy_file_lock (struct file *file, unsigned int cmd)
 437 {
 438         return 0;
 439 }
 440
 441 static int dummy_file_fcntl (struct file *file, unsigned int cmd,
 442                              unsigned long arg)
 443 {
 444         return 0;
 445 }
 446
 447 static int dummy_file_set_fowner (struct file *file)
 448 {
 449         return 0;
 450 }
 451
 452 static int dummy_file_send_sigiotask (struct task_struct *tsk,
 453                                       struct fown_struct *fown, int sig)
 454 {
 455         return 0;
 456 }
 457
 458 static int dummy_file_receive (struct file *file)
 459 {
 460         return 0;
 461 }
 462
 463 static int dummy_task_create (unsigned long clone_flags)
 464 {
 465         return 0;
 466 }
 467
 468 static int dummy_task_alloc_security (struct task_struct *p)
 469 {
 470         return 0;
 471 }
 472
 473 static void dummy_task_free_security (struct task_struct *p)
 474 {
 475         return;
 476 }
 477
 478 static int dummy_task_setuid (uid_t id0, uid_t id1, uid_t id2, int flags)
 479 {
 480         return 0;
 481 }
 482
 483 static int dummy_task_post_setuid (uid_t id0, uid_t id1, uid_t id2, int flags)
 484 {
 485         dummy_capget(current, &current->cap_effective, &current->cap_inheritable, &current->cap_permitted);
 486         return 0;
 487 }
 488
 489 static int dummy_task_setgid (gid_t id0, gid_t id1, gid_t id2, int flags)
 490 {
 491         return 0;
 492 }
 493
 494 static int dummy_task_setpgid (struct task_struct *p, pid_t pgid)
 495 {
 496         return 0;
 497 }
 498
 499 static int dummy_task_getpgid (struct task_struct *p)
 500 {
 501         return 0;
 502 }
 503
 504 static int dummy_task_getsid (struct task_struct *p)
 505 {
 506         return 0;
 507 }
 508
 509 static void dummy_task_getsecid (struct task_struct *p, u32 *secid)
 510 { }
 511
 512 static int dummy_task_setgroups (struct group_info *group_info)
 513 {
 514         return 0;
 515 }
 516
 517 static int dummy_task_setnice (struct task_struct *p, int nice)
 518 {
 519         return 0;
 520 }
 521
 522 static int dummy_task_setioprio (struct task_struct *p, int ioprio)
 523 {
 524         return 0;
 525 }
 526
 527 static int dummy_task_setrlimit (unsigned int resource, struct rlimit *new_rlim)
 528 {
 529         return 0;
 530 }
 531
 532 static int dummy_task_setscheduler (struct task_struct *p, int policy,
 533                                     struct sched_param *lp)
 534 {
 535         return 0;
 536 }
 537
 538 static int dummy_task_getscheduler (struct task_struct *p)
 539 {
 540         return 0;
 541 }
 542
 543 static int dummy_task_movememory (struct task_struct *p)
 544 {
 545         return 0;
 546 }
 547
 548 static int dummy_task_wait (struct task_struct *p)
 549 {
 550         return 0;
 551 }
 552
 553 static int dummy_task_kill (struct task_struct *p, struct siginfo *info,
 554                             int sig, u32 secid)
 555 {
 556         return 0;
 557 }
 558
 559 static int dummy_task_prctl (int option, unsigned long arg2, unsigned long arg3,
 560                              unsigned long arg4, unsigned long arg5)
 561 {
 562         return 0;
 563 }
 564
 565 static void dummy_task_reparent_to_init (struct task_struct *p)
 566 {
 567         p->euid = p->fsuid = 0;
 568         return;
 569 }
 570
 571 static void dummy_task_to_inode(struct task_struct *p, struct inode *inode)
 572 { }
 573
 574 static int dummy_ipc_permission (struct kern_ipc_perm *ipcp, short flag)
 575 {
 576         return 0;
 577 }
 578
 579 static int dummy_msg_msg_alloc_security (struct msg_msg *msg)
 580 {
 581         return 0;
 582 }
 583
 584 static void dummy_msg_msg_free_security (struct msg_msg *msg)
 585 {
 586         return;
 587 }
 588
 589 static int dummy_msg_queue_alloc_security (struct msg_queue *msq)
 590 {
 591         return 0;
 592 }
 593
 594 static void dummy_msg_queue_free_security (struct msg_queue *msq)
 595 {
 596         return;
 597 }
 598
 599 static int dummy_msg_queue_associate (struct msg_queue *msq,
 600                                       int msqflg)
 601 {
 602         return 0;
 603 }
 604
 605 static int dummy_msg_queue_msgctl (struct msg_queue *msq, int cmd)
 606 {
 607         return 0;
 608 }
 609
 610 static int dummy_msg_queue_msgsnd (struct msg_queue *msq, struct msg_msg *msg,
 611                                    int msgflg)
 612 {
 613         return 0;
 614 }
 615
 616 static int dummy_msg_queue_msgrcv (struct msg_queue *msq, struct msg_msg *msg,
 617                                    struct task_struct *target, long type,
 618                                    int mode)
 619 {
 620         return 0;
 621 }
 622
 623 static int dummy_shm_alloc_security (struct shmid_kernel *shp)
 624 {
 625         return 0;
 626 }
 627
 628 static void dummy_shm_free_security (struct shmid_kernel *shp)
 629 {
 630         return;
 631 }
 632
 633 static int dummy_shm_associate (struct shmid_kernel *shp, int shmflg)
 634 {
 635         return 0;
 636 }
 637
 638 static int dummy_shm_shmctl (struct shmid_kernel *shp, int cmd)
 639 {
 640         return 0;
 641 }
 642
 643 static int dummy_shm_shmat (struct shmid_kernel *shp, char __user *shmaddr,
 644                             int shmflg)
 645 {
 646         return 0;
 647 }
 648
 649 static int dummy_sem_alloc_security (struct sem_array *sma)
 650 {
 651         return 0;
 652 }
 653
 654 static void dummy_sem_free_security (struct sem_array *sma)
 655 {
 656         return;
 657 }
 658
 659 static int dummy_sem_associate (struct sem_array *sma, int semflg)
 660 {
 661         return 0;
 662 }
 663
 664 static int dummy_sem_semctl (struct sem_array *sma, int cmd)
 665 {
 666         return 0;
 667 }
 668
 669 static int dummy_sem_semop (struct sem_array *sma,
 670                             struct sembuf *sops, unsigned nsops, int alter)
 671 {
 672         return 0;
 673 }
 674
 675 static int dummy_netlink_send (struct sock *sk, struct sk_buff *skb)
 676 {
 677         NETLINK_CB(skb).eff_cap = current->cap_effective;
 678         return 0;
 679 }
 680
 681 static int dummy_netlink_recv (struct sk_buff *skb, int cap)
 682 {
 683         if (!cap_raised (NETLINK_CB (skb).eff_cap, cap))
 684                 return -EPERM;
 685         return 0;
 686 }
 687
 688 #ifdef CONFIG_SECURITY_NETWORK
 689 static int dummy_unix_stream_connect (struct socket *sock,
 690                                       struct socket *other,
 691                                       struct sock *newsk)
 692 {
 693         return 0;
 694 }
 695
 696 static int dummy_unix_may_send (struct socket *sock,
 697                                 struct socket *other)
 698 {
 699         return 0;
 700 }
 701
 702 static int dummy_socket_create (int family, int type,
 703                                 int protocol, int kern)
 704 {
 705         return 0;
 706 }
 707
 708 static void dummy_socket_post_create (struct socket *sock, int family, int type,
 709                                       int protocol, int kern)
 710 {
 711         return;
 712 }
 713
 714 static int dummy_socket_bind (struct socket *sock, struct sockaddr *address,
 715                               int addrlen)
 716 {
 717         return 0;
 718 }
 719
 720 static int dummy_socket_connect (struct socket *sock, struct sockaddr *address,
 721                                  int addrlen)
 722 {
 723         return 0;
 724 }
 725
 726 static int dummy_socket_listen (struct socket *sock, int backlog)
 727 {
 728         return 0;
 729 }
 730
 731 static int dummy_socket_accept (struct socket *sock, struct socket *newsock)
 732 {
 733         return 0;
 734 }
 735
 736 static void dummy_socket_post_accept (struct socket *sock,
 737                                       struct socket *newsock)
 738 {
 739         return;
 740 }
 741
 742 static int dummy_socket_sendmsg (struct socket *sock, struct msghdr *msg,
 743                                  int size)
 744 {
 745         return 0;
 746 }
 747
 748 static int dummy_socket_recvmsg (struct socket *sock, struct msghdr *msg,
 749                                  int size, int flags)
 750 {
 751         return 0;
 752 }
 753
 754 static int dummy_socket_getsockname (struct socket *sock)
 755 {
 756         return 0;
 757 }
 758
 759 static int dummy_socket_getpeername (struct socket *sock)
 760 {
 761         return 0;
 762 }
 763
 764 static int dummy_socket_setsockopt (struct socket *sock, int level, int optname)
 765 {
 766         return 0;
 767 }
 768
 769 static int dummy_socket_getsockopt (struct socket *sock, int level, int optname)
 770 {
 771         return 0;
 772 }
 773
 774 static int dummy_socket_shutdown (struct socket *sock, int how)
 775 {
 776         return 0;
 777 }
 778
 779 static int dummy_socket_sock_rcv_skb (struct sock *sk, struct sk_buff *skb)
 780 {
 781         return 0;
 782 }
 783
 784 static int dummy_socket_getpeersec_stream(struct socket *sock, char __user *optval,
 785                                           int __user *optlen, unsigned len)
 786 {
 787         return -ENOPROTOOPT;
 788 }
 789
 790 static int dummy_socket_getpeersec_dgram(struct sk_buff *skb, char **secdata,
 791                                          u32 *seclen)
 792 {
 793         return -ENOPROTOOPT;
 794 }
 795
 796 static inline int dummy_sk_alloc_security (struct sock *sk, int family, gfp_t priority)
 797 {
 798         return 0;
 799 }
 800
 801 static inline void dummy_sk_free_security (struct sock *sk)
 802 {
 803 }
 804
 805 static unsigned int dummy_sk_getsid(struct sock *sk, struct flowi *fl, u8 dir)
 806 {
 807         return 0;
 808 }
 809 #endif  /* CONFIG_SECURITY_NETWORK */
 810
 811 #ifdef CONFIG_SECURITY_NETWORK_XFRM
 812 static int dummy_xfrm_policy_alloc_security(struct xfrm_policy *xp, struct xfrm_user_sec_ctx *sec_ctx)
 813 {
 814         return 0;
 815 }
 816
 817 static inline int dummy_xfrm_policy_clone_security(struct xfrm_policy *old, struct xfrm_policy *new)
 818 {
 819         return 0;
 820 }
 821
 822 static void dummy_xfrm_policy_free_security(struct xfrm_policy *xp)
 823 {
 824 }
 825
 826 static int dummy_xfrm_policy_delete_security(struct xfrm_policy *xp)
 827 {
 828         return 0;
 829 }
 830
 831 static int dummy_xfrm_state_alloc_security(struct xfrm_state *x, struct xfrm_user_sec_ctx *sec_ctx)
 832 {
 833         return 0;
 834 }
 835
 836 static void dummy_xfrm_state_free_security(struct xfrm_state *x)
 837 {
 838 }
 839
 840 static int dummy_xfrm_state_delete_security(struct xfrm_state *x)
 841 {
 842         return 0;
 843 }
 844
 845 static int dummy_xfrm_policy_lookup(struct xfrm_policy *xp, u32 sk_sid, u8 dir)
 846 {
 847         return 0;
 848 }
 849 #endif /* CONFIG_SECURITY_NETWORK_XFRM */
 850 static int dummy_register_security (const char *name, struct security_operations *ops)
 851 {
 852         return -EINVAL;
 853 }
 854
 855 static int dummy_unregister_security (const char *name, struct security_operations *ops)
 856 {
 857         return -EINVAL;
 858 }
 859
 860 static void dummy_d_instantiate (struct dentry *dentry, struct inode *inode)
 861 {
 862         return;
 863 }
 864
 865 static int dummy_getprocattr(struct task_struct *p, char *name, void *value, size_t size)
 866 {
 867         return -EINVAL;
 868 }
 869
 870 static int dummy_setprocattr(struct task_struct *p, char *name, void *value, size_t size)
 871 {
 872         return -EINVAL;
 873 }
 874
 875 #ifdef CONFIG_KEYS
 876 static inline int dummy_key_alloc(struct key *key, struct task_struct *ctx,
 877                                   unsigned long flags)
 878 {
 879         return 0;
 880 }
 881
 882 static inline void dummy_key_free(struct key *key)
 883 {
 884 }
 885
 886 static inline int dummy_key_permission(key_ref_t key_ref,
 887                                        struct task_struct *context,
 888                                        key_perm_t perm)
 889 {
 890         return 0;
 891 }
 892 #endif /* CONFIG_KEYS */
 893
 894 struct security_operations dummy_security_ops;
 895
 896 #define set_to_dummy_if_null(ops, function)                             \
 897         do {                                                            \
 898                 if (!ops->function) {                                   \
 899                         ops->function = dummy_##function;               \
 900                         pr_debug("Had to override the " #function       \
 901                                  " security operation with the dummy one.\n");\
 902                         }                                               \
 903         } while (0)
 904
 905 void security_fixup_ops (struct security_operations *ops)
 906 {
 907         set_to_dummy_if_null(ops, ptrace);
 908         set_to_dummy_if_null(ops, capget);
 909         set_to_dummy_if_null(ops, capset_check);
 910         set_to_dummy_if_null(ops, capset_set);
 911         set_to_dummy_if_null(ops, acct);
 912         set_to_dummy_if_null(ops, capable);
 913         set_to_dummy_if_null(ops, quotactl);
 914         set_to_dummy_if_null(ops, quota_on);
 915         set_to_dummy_if_null(ops, sysctl);
 916         set_to_dummy_if_null(ops, syslog);
 917         set_to_dummy_if_null(ops, settime);
 918         set_to_dummy_if_null(ops, vm_enough_memory);
 919         set_to_dummy_if_null(ops, bprm_alloc_security);
 920         set_to_dummy_if_null(ops, bprm_free_security);
 921         set_to_dummy_if_null(ops, bprm_apply_creds);
 922         set_to_dummy_if_null(ops, bprm_post_apply_creds);
 923         set_to_dummy_if_null(ops, bprm_set_security);
 924         set_to_dummy_if_null(ops, bprm_check_security);
 925         set_to_dummy_if_null(ops, bprm_secureexec);
 926         set_to_dummy_if_null(ops, sb_alloc_security);
 927         set_to_dummy_if_null(ops, sb_free_security);
 928         set_to_dummy_if_null(ops, sb_copy_data);
 929         set_to_dummy_if_null(ops, sb_kern_mount);
 930         set_to_dummy_if_null(ops, sb_statfs);
 931         set_to_dummy_if_null(ops, sb_mount);
 932         set_to_dummy_if_null(ops, sb_check_sb);
 933         set_to_dummy_if_null(ops, sb_umount);
 934         set_to_dummy_if_null(ops, sb_umount_close);
 935         set_to_dummy_if_null(ops, sb_umount_busy);
 936         set_to_dummy_if_null(ops, sb_post_remount);
 937         set_to_dummy_if_null(ops, sb_post_mountroot);
 938         set_to_dummy_if_null(ops, sb_post_addmount);
 939         set_to_dummy_if_null(ops, sb_pivotroot);
 940         set_to_dummy_if_null(ops, sb_post_pivotroot);
 941         set_to_dummy_if_null(ops, inode_alloc_security);
 942         set_to_dummy_if_null(ops, inode_free_security);
 943         set_to_dummy_if_null(ops, inode_init_security);
 944         set_to_dummy_if_null(ops, inode_create);
 945         set_to_dummy_if_null(ops, inode_link);
 946         set_to_dummy_if_null(ops, inode_unlink);
 947         set_to_dummy_if_null(ops, inode_symlink);
 948         set_to_dummy_if_null(ops, inode_mkdir);
 949         set_to_dummy_if_null(ops, inode_rmdir);
 950         set_to_dummy_if_null(ops, inode_mknod);
 951         set_to_dummy_if_null(ops, inode_rename);
 952         set_to_dummy_if_null(ops, inode_readlink);
 953         set_to_dummy_if_null(ops, inode_follow_link);
 954         set_to_dummy_if_null(ops, inode_permission);
 955         set_to_dummy_if_null(ops, inode_setattr);
 956         set_to_dummy_if_null(ops, inode_getattr);
 957         set_to_dummy_if_null(ops, inode_delete);
 958         set_to_dummy_if_null(ops, inode_setxattr);
 959         set_to_dummy_if_null(ops, inode_post_setxattr);
 960         set_to_dummy_if_null(ops, inode_getxattr);
 961         set_to_dummy_if_null(ops, inode_listxattr);
 962         set_to_dummy_if_null(ops, inode_removexattr);
 963         set_to_dummy_if_null(ops, inode_xattr_getsuffix);
 964         set_to_dummy_if_null(ops, inode_getsecurity);
 965         set_to_dummy_if_null(ops, inode_setsecurity);
 966         set_to_dummy_if_null(ops, inode_listsecurity);
 967         set_to_dummy_if_null(ops, file_permission);
 968         set_to_dummy_if_null(ops, file_alloc_security);
 969         set_to_dummy_if_null(ops, file_free_security);
 970         set_to_dummy_if_null(ops, file_ioctl);
 971         set_to_dummy_if_null(ops, file_mmap);
 972         set_to_dummy_if_null(ops, file_mprotect);
 973         set_to_dummy_if_null(ops, file_lock);
 974         set_to_dummy_if_null(ops, file_fcntl);
 975         set_to_dummy_if_null(ops, file_set_fowner);
 976         set_to_dummy_if_null(ops, file_send_sigiotask);
 977         set_to_dummy_if_null(ops, file_receive);
 978         set_to_dummy_if_null(ops, task_create);
 979         set_to_dummy_if_null(ops, task_alloc_security);
 980         set_to_dummy_if_null(ops, task_free_security);
 981         set_to_dummy_if_null(ops, task_setuid);
 982         set_to_dummy_if_null(ops, task_post_setuid);
 983         set_to_dummy_if_null(ops, task_setgid);
 984         set_to_dummy_if_null(ops, task_setpgid);
 985         set_to_dummy_if_null(ops, task_getpgid);
 986         set_to_dummy_if_null(ops, task_getsid);
 987         set_to_dummy_if_null(ops, task_getsecid);
 988         set_to_dummy_if_null(ops, task_setgroups);
 989         set_to_dummy_if_null(ops, task_setnice);
 990         set_to_dummy_if_null(ops, task_setioprio);
 991         set_to_dummy_if_null(ops, task_setrlimit);
 992         set_to_dummy_if_null(ops, task_setscheduler);
 993         set_to_dummy_if_null(ops, task_getscheduler);
 994         set_to_dummy_if_null(ops, task_movememory);
 995         set_to_dummy_if_null(ops, task_wait);
 996         set_to_dummy_if_null(ops, task_kill);
 997         set_to_dummy_if_null(ops, task_prctl);
 998         set_to_dummy_if_null(ops, task_reparent_to_init);
 999         set_to_dummy_if_null(ops, task_to_inode);
1000         set_to_dummy_if_null(ops, ipc_permission);
1001         set_to_dummy_if_null(ops, msg_msg_alloc_security);
1002         set_to_dummy_if_null(ops, msg_msg_free_security);
1003         set_to_dummy_if_null(ops, msg_queue_alloc_security);
1004         set_to_dummy_if_null(ops, msg_queue_free_security);
1005         set_to_dummy_if_null(ops, msg_queue_associate);
1006         set_to_dummy_if_null(ops, msg_queue_msgctl);
1007         set_to_dummy_if_null(ops, msg_queue_msgsnd);
1008         set_to_dummy_if_null(ops, msg_queue_msgrcv);
1009         set_to_dummy_if_null(ops, shm_alloc_security);
1010         set_to_dummy_if_null(ops, shm_free_security);
1011         set_to_dummy_if_null(ops, shm_associate);
1012         set_to_dummy_if_null(ops, shm_shmctl);
1013         set_to_dummy_if_null(ops, shm_shmat);
1014         set_to_dummy_if_null(ops, sem_alloc_security);
1015         set_to_dummy_if_null(ops, sem_free_security);
1016         set_to_dummy_if_null(ops, sem_associate);
1017         set_to_dummy_if_null(ops, sem_semctl);
1018         set_to_dummy_if_null(ops, sem_semop);
1019         set_to_dummy_if_null(ops, netlink_send);
1020         set_to_dummy_if_null(ops, netlink_recv);
1021         set_to_dummy_if_null(ops, register_security);
1022         set_to_dummy_if_null(ops, unregister_security);
1023         set_to_dummy_if_null(ops, d_instantiate);
1024         set_to_dummy_if_null(ops, getprocattr);
1025         set_to_dummy_if_null(ops, setprocattr);
1026 #ifdef CONFIG_SECURITY_NETWORK
1027         set_to_dummy_if_null(ops, unix_stream_connect);
1028         set_to_dummy_if_null(ops, unix_may_send);
1029         set_to_dummy_if_null(ops, socket_create);
1030         set_to_dummy_if_null(ops, socket_post_create);
1031         set_to_dummy_if_null(ops, socket_bind);
1032         set_to_dummy_if_null(ops, socket_connect);
1033         set_to_dummy_if_null(ops, socket_listen);
1034         set_to_dummy_if_null(ops, socket_accept);
1035         set_to_dummy_if_null(ops, socket_post_accept);
1036         set_to_dummy_if_null(ops, socket_sendmsg);
1037         set_to_dummy_if_null(ops, socket_recvmsg);
1038         set_to_dummy_if_null(ops, socket_getsockname);
1039         set_to_dummy_if_null(ops, socket_getpeername);
1040         set_to_dummy_if_null(ops, socket_setsockopt);
1041         set_to_dummy_if_null(ops, socket_getsockopt);
1042         set_to_dummy_if_null(ops, socket_shutdown);
1043         set_to_dummy_if_null(ops, socket_sock_rcv_skb);
1044         set_to_dummy_if_null(ops, socket_getpeersec_stream);
1045         set_to_dummy_if_null(ops, socket_getpeersec_dgram);
1046         set_to_dummy_if_null(ops, sk_alloc_security);
1047         set_to_dummy_if_null(ops, sk_free_security);
1048         set_to_dummy_if_null(ops, sk_getsid);
1049  #endif /* CONFIG_SECURITY_NETWORK */
1050 #ifdef  CONFIG_SECURITY_NETWORK_XFRM
1051         set_to_dummy_if_null(ops, xfrm_policy_alloc_security);
1052         set_to_dummy_if_null(ops, xfrm_policy_clone_security);
1053         set_to_dummy_if_null(ops, xfrm_policy_free_security);
1054         set_to_dummy_if_null(ops, xfrm_policy_delete_security);
1055         set_to_dummy_if_null(ops, xfrm_state_alloc_security);
1056         set_to_dummy_if_null(ops, xfrm_state_free_security);
1057         set_to_dummy_if_null(ops, xfrm_state_delete_security);
1058         set_to_dummy_if_null(ops, xfrm_policy_lookup);
1059 #endif  /* CONFIG_SECURITY_NETWORK_XFRM */
1060 #ifdef CONFIG_KEYS
1061         set_to_dummy_if_null(ops, key_alloc);
1062         set_to_dummy_if_null(ops, key_free);
1063         set_to_dummy_if_null(ops, key_permission);
1064 #endif  /* CONFIG_KEYS */
1065
1066 }
1067