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