Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Randy.Dunlap | c59ede7 | 2006-01-11 12:17:46 -0800 | [diff] [blame^] | 17 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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) { |
Alan Cox | d6e7114 | 2005-06-23 00:09:43 -0700 | [diff] [blame] | 134 | current->mm->dumpable = suid_dumpable; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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, ¤t->cap_effective, ¤t->cap_inheritable, ¤t->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 super_block *sb) |
| 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 | |
Stephen Smalley | 5e41ff9 | 2005-09-09 13:01:35 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | static int dummy_inode_create (struct inode *inode, struct dentry *dentry, |
| 269 | int mask) |
| 270 | { |
| 271 | return 0; |
| 272 | } |
| 273 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | static int dummy_inode_link (struct dentry *old_dentry, struct inode *inode, |
| 275 | struct dentry *new_dentry) |
| 276 | { |
| 277 | return 0; |
| 278 | } |
| 279 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | static int dummy_inode_mkdir (struct inode *inode, struct dentry *dentry, |
| 292 | int mask) |
| 293 | { |
| 294 | return 0; |
| 295 | } |
| 296 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
James Morris | d381d8a | 2005-10-30 14:59:22 -0800 | [diff] [blame] | 381 | static int dummy_inode_getsecurity(struct inode *inode, const char *name, void *buffer, size_t size, int err) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 int dummy_file_permission (struct file *file, int mask) |
| 397 | { |
| 398 | return 0; |
| 399 | } |
| 400 | |
| 401 | static int dummy_file_alloc_security (struct file *file) |
| 402 | { |
| 403 | return 0; |
| 404 | } |
| 405 | |
| 406 | static void dummy_file_free_security (struct file *file) |
| 407 | { |
| 408 | return; |
| 409 | } |
| 410 | |
| 411 | static int dummy_file_ioctl (struct file *file, unsigned int command, |
| 412 | unsigned long arg) |
| 413 | { |
| 414 | return 0; |
| 415 | } |
| 416 | |
| 417 | static int dummy_file_mmap (struct file *file, unsigned long reqprot, |
| 418 | unsigned long prot, |
| 419 | unsigned long flags) |
| 420 | { |
| 421 | return 0; |
| 422 | } |
| 423 | |
| 424 | static int dummy_file_mprotect (struct vm_area_struct *vma, |
| 425 | unsigned long reqprot, |
| 426 | unsigned long prot) |
| 427 | { |
| 428 | return 0; |
| 429 | } |
| 430 | |
| 431 | static int dummy_file_lock (struct file *file, unsigned int cmd) |
| 432 | { |
| 433 | return 0; |
| 434 | } |
| 435 | |
| 436 | static int dummy_file_fcntl (struct file *file, unsigned int cmd, |
| 437 | unsigned long arg) |
| 438 | { |
| 439 | return 0; |
| 440 | } |
| 441 | |
| 442 | static int dummy_file_set_fowner (struct file *file) |
| 443 | { |
| 444 | return 0; |
| 445 | } |
| 446 | |
| 447 | static int dummy_file_send_sigiotask (struct task_struct *tsk, |
| 448 | struct fown_struct *fown, int sig) |
| 449 | { |
| 450 | return 0; |
| 451 | } |
| 452 | |
| 453 | static int dummy_file_receive (struct file *file) |
| 454 | { |
| 455 | return 0; |
| 456 | } |
| 457 | |
| 458 | static int dummy_task_create (unsigned long clone_flags) |
| 459 | { |
| 460 | return 0; |
| 461 | } |
| 462 | |
| 463 | static int dummy_task_alloc_security (struct task_struct *p) |
| 464 | { |
| 465 | return 0; |
| 466 | } |
| 467 | |
| 468 | static void dummy_task_free_security (struct task_struct *p) |
| 469 | { |
| 470 | return; |
| 471 | } |
| 472 | |
| 473 | static int dummy_task_setuid (uid_t id0, uid_t id1, uid_t id2, int flags) |
| 474 | { |
| 475 | return 0; |
| 476 | } |
| 477 | |
| 478 | static int dummy_task_post_setuid (uid_t id0, uid_t id1, uid_t id2, int flags) |
| 479 | { |
| 480 | dummy_capget(current, ¤t->cap_effective, ¤t->cap_inheritable, ¤t->cap_permitted); |
| 481 | return 0; |
| 482 | } |
| 483 | |
| 484 | static int dummy_task_setgid (gid_t id0, gid_t id1, gid_t id2, int flags) |
| 485 | { |
| 486 | return 0; |
| 487 | } |
| 488 | |
| 489 | static int dummy_task_setpgid (struct task_struct *p, pid_t pgid) |
| 490 | { |
| 491 | return 0; |
| 492 | } |
| 493 | |
| 494 | static int dummy_task_getpgid (struct task_struct *p) |
| 495 | { |
| 496 | return 0; |
| 497 | } |
| 498 | |
| 499 | static int dummy_task_getsid (struct task_struct *p) |
| 500 | { |
| 501 | return 0; |
| 502 | } |
| 503 | |
| 504 | static int dummy_task_setgroups (struct group_info *group_info) |
| 505 | { |
| 506 | return 0; |
| 507 | } |
| 508 | |
| 509 | static int dummy_task_setnice (struct task_struct *p, int nice) |
| 510 | { |
| 511 | return 0; |
| 512 | } |
| 513 | |
| 514 | static int dummy_task_setrlimit (unsigned int resource, struct rlimit *new_rlim) |
| 515 | { |
| 516 | return 0; |
| 517 | } |
| 518 | |
| 519 | static int dummy_task_setscheduler (struct task_struct *p, int policy, |
| 520 | struct sched_param *lp) |
| 521 | { |
| 522 | return 0; |
| 523 | } |
| 524 | |
| 525 | static int dummy_task_getscheduler (struct task_struct *p) |
| 526 | { |
| 527 | return 0; |
| 528 | } |
| 529 | |
| 530 | static int dummy_task_wait (struct task_struct *p) |
| 531 | { |
| 532 | return 0; |
| 533 | } |
| 534 | |
| 535 | static int dummy_task_kill (struct task_struct *p, struct siginfo *info, |
| 536 | int sig) |
| 537 | { |
| 538 | return 0; |
| 539 | } |
| 540 | |
| 541 | static int dummy_task_prctl (int option, unsigned long arg2, unsigned long arg3, |
| 542 | unsigned long arg4, unsigned long arg5) |
| 543 | { |
| 544 | return 0; |
| 545 | } |
| 546 | |
| 547 | static void dummy_task_reparent_to_init (struct task_struct *p) |
| 548 | { |
| 549 | p->euid = p->fsuid = 0; |
| 550 | return; |
| 551 | } |
| 552 | |
| 553 | static void dummy_task_to_inode(struct task_struct *p, struct inode *inode) |
| 554 | { } |
| 555 | |
| 556 | static int dummy_ipc_permission (struct kern_ipc_perm *ipcp, short flag) |
| 557 | { |
| 558 | return 0; |
| 559 | } |
| 560 | |
| 561 | static int dummy_msg_msg_alloc_security (struct msg_msg *msg) |
| 562 | { |
| 563 | return 0; |
| 564 | } |
| 565 | |
| 566 | static void dummy_msg_msg_free_security (struct msg_msg *msg) |
| 567 | { |
| 568 | return; |
| 569 | } |
| 570 | |
| 571 | static int dummy_msg_queue_alloc_security (struct msg_queue *msq) |
| 572 | { |
| 573 | return 0; |
| 574 | } |
| 575 | |
| 576 | static void dummy_msg_queue_free_security (struct msg_queue *msq) |
| 577 | { |
| 578 | return; |
| 579 | } |
| 580 | |
| 581 | static int dummy_msg_queue_associate (struct msg_queue *msq, |
| 582 | int msqflg) |
| 583 | { |
| 584 | return 0; |
| 585 | } |
| 586 | |
| 587 | static int dummy_msg_queue_msgctl (struct msg_queue *msq, int cmd) |
| 588 | { |
| 589 | return 0; |
| 590 | } |
| 591 | |
| 592 | static int dummy_msg_queue_msgsnd (struct msg_queue *msq, struct msg_msg *msg, |
| 593 | int msgflg) |
| 594 | { |
| 595 | return 0; |
| 596 | } |
| 597 | |
| 598 | static int dummy_msg_queue_msgrcv (struct msg_queue *msq, struct msg_msg *msg, |
| 599 | struct task_struct *target, long type, |
| 600 | int mode) |
| 601 | { |
| 602 | return 0; |
| 603 | } |
| 604 | |
| 605 | static int dummy_shm_alloc_security (struct shmid_kernel *shp) |
| 606 | { |
| 607 | return 0; |
| 608 | } |
| 609 | |
| 610 | static void dummy_shm_free_security (struct shmid_kernel *shp) |
| 611 | { |
| 612 | return; |
| 613 | } |
| 614 | |
| 615 | static int dummy_shm_associate (struct shmid_kernel *shp, int shmflg) |
| 616 | { |
| 617 | return 0; |
| 618 | } |
| 619 | |
| 620 | static int dummy_shm_shmctl (struct shmid_kernel *shp, int cmd) |
| 621 | { |
| 622 | return 0; |
| 623 | } |
| 624 | |
| 625 | static int dummy_shm_shmat (struct shmid_kernel *shp, char __user *shmaddr, |
| 626 | int shmflg) |
| 627 | { |
| 628 | return 0; |
| 629 | } |
| 630 | |
| 631 | static int dummy_sem_alloc_security (struct sem_array *sma) |
| 632 | { |
| 633 | return 0; |
| 634 | } |
| 635 | |
| 636 | static void dummy_sem_free_security (struct sem_array *sma) |
| 637 | { |
| 638 | return; |
| 639 | } |
| 640 | |
| 641 | static int dummy_sem_associate (struct sem_array *sma, int semflg) |
| 642 | { |
| 643 | return 0; |
| 644 | } |
| 645 | |
| 646 | static int dummy_sem_semctl (struct sem_array *sma, int cmd) |
| 647 | { |
| 648 | return 0; |
| 649 | } |
| 650 | |
| 651 | static int dummy_sem_semop (struct sem_array *sma, |
| 652 | struct sembuf *sops, unsigned nsops, int alter) |
| 653 | { |
| 654 | return 0; |
| 655 | } |
| 656 | |
| 657 | static int dummy_netlink_send (struct sock *sk, struct sk_buff *skb) |
| 658 | { |
| 659 | NETLINK_CB(skb).eff_cap = current->cap_effective; |
| 660 | return 0; |
| 661 | } |
| 662 | |
| 663 | static int dummy_netlink_recv (struct sk_buff *skb) |
| 664 | { |
| 665 | if (!cap_raised (NETLINK_CB (skb).eff_cap, CAP_NET_ADMIN)) |
| 666 | return -EPERM; |
| 667 | return 0; |
| 668 | } |
| 669 | |
| 670 | #ifdef CONFIG_SECURITY_NETWORK |
| 671 | static int dummy_unix_stream_connect (struct socket *sock, |
| 672 | struct socket *other, |
| 673 | struct sock *newsk) |
| 674 | { |
| 675 | return 0; |
| 676 | } |
| 677 | |
| 678 | static int dummy_unix_may_send (struct socket *sock, |
| 679 | struct socket *other) |
| 680 | { |
| 681 | return 0; |
| 682 | } |
| 683 | |
| 684 | static int dummy_socket_create (int family, int type, |
| 685 | int protocol, int kern) |
| 686 | { |
| 687 | return 0; |
| 688 | } |
| 689 | |
| 690 | static void dummy_socket_post_create (struct socket *sock, int family, int type, |
| 691 | int protocol, int kern) |
| 692 | { |
| 693 | return; |
| 694 | } |
| 695 | |
| 696 | static int dummy_socket_bind (struct socket *sock, struct sockaddr *address, |
| 697 | int addrlen) |
| 698 | { |
| 699 | return 0; |
| 700 | } |
| 701 | |
| 702 | static int dummy_socket_connect (struct socket *sock, struct sockaddr *address, |
| 703 | int addrlen) |
| 704 | { |
| 705 | return 0; |
| 706 | } |
| 707 | |
| 708 | static int dummy_socket_listen (struct socket *sock, int backlog) |
| 709 | { |
| 710 | return 0; |
| 711 | } |
| 712 | |
| 713 | static int dummy_socket_accept (struct socket *sock, struct socket *newsock) |
| 714 | { |
| 715 | return 0; |
| 716 | } |
| 717 | |
| 718 | static void dummy_socket_post_accept (struct socket *sock, |
| 719 | struct socket *newsock) |
| 720 | { |
| 721 | return; |
| 722 | } |
| 723 | |
| 724 | static int dummy_socket_sendmsg (struct socket *sock, struct msghdr *msg, |
| 725 | int size) |
| 726 | { |
| 727 | return 0; |
| 728 | } |
| 729 | |
| 730 | static int dummy_socket_recvmsg (struct socket *sock, struct msghdr *msg, |
| 731 | int size, int flags) |
| 732 | { |
| 733 | return 0; |
| 734 | } |
| 735 | |
| 736 | static int dummy_socket_getsockname (struct socket *sock) |
| 737 | { |
| 738 | return 0; |
| 739 | } |
| 740 | |
| 741 | static int dummy_socket_getpeername (struct socket *sock) |
| 742 | { |
| 743 | return 0; |
| 744 | } |
| 745 | |
| 746 | static int dummy_socket_setsockopt (struct socket *sock, int level, int optname) |
| 747 | { |
| 748 | return 0; |
| 749 | } |
| 750 | |
| 751 | static int dummy_socket_getsockopt (struct socket *sock, int level, int optname) |
| 752 | { |
| 753 | return 0; |
| 754 | } |
| 755 | |
| 756 | static int dummy_socket_shutdown (struct socket *sock, int how) |
| 757 | { |
| 758 | return 0; |
| 759 | } |
| 760 | |
| 761 | static int dummy_socket_sock_rcv_skb (struct sock *sk, struct sk_buff *skb) |
| 762 | { |
| 763 | return 0; |
| 764 | } |
| 765 | |
| 766 | static int dummy_socket_getpeersec(struct socket *sock, char __user *optval, |
| 767 | int __user *optlen, unsigned len) |
| 768 | { |
| 769 | return -ENOPROTOOPT; |
| 770 | } |
| 771 | |
Al Viro | 7d877f3 | 2005-10-21 03:20:43 -0400 | [diff] [blame] | 772 | static inline int dummy_sk_alloc_security (struct sock *sk, int family, gfp_t priority) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 773 | { |
| 774 | return 0; |
| 775 | } |
| 776 | |
| 777 | static inline void dummy_sk_free_security (struct sock *sk) |
| 778 | { |
| 779 | } |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 780 | |
| 781 | static unsigned int dummy_sk_getsid(struct sock *sk, struct flowi *fl, u8 dir) |
| 782 | { |
| 783 | return 0; |
| 784 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 785 | #endif /* CONFIG_SECURITY_NETWORK */ |
| 786 | |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 787 | #ifdef CONFIG_SECURITY_NETWORK_XFRM |
| 788 | static int dummy_xfrm_policy_alloc_security(struct xfrm_policy *xp, struct xfrm_user_sec_ctx *sec_ctx) |
| 789 | { |
| 790 | return 0; |
| 791 | } |
| 792 | |
| 793 | static inline int dummy_xfrm_policy_clone_security(struct xfrm_policy *old, struct xfrm_policy *new) |
| 794 | { |
| 795 | return 0; |
| 796 | } |
| 797 | |
| 798 | static void dummy_xfrm_policy_free_security(struct xfrm_policy *xp) |
| 799 | { |
| 800 | } |
| 801 | |
| 802 | static int dummy_xfrm_state_alloc_security(struct xfrm_state *x, struct xfrm_user_sec_ctx *sec_ctx) |
| 803 | { |
| 804 | return 0; |
| 805 | } |
| 806 | |
| 807 | static void dummy_xfrm_state_free_security(struct xfrm_state *x) |
| 808 | { |
| 809 | } |
| 810 | |
| 811 | static int dummy_xfrm_policy_lookup(struct xfrm_policy *xp, u32 sk_sid, u8 dir) |
| 812 | { |
| 813 | return 0; |
| 814 | } |
| 815 | #endif /* CONFIG_SECURITY_NETWORK_XFRM */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 816 | static int dummy_register_security (const char *name, struct security_operations *ops) |
| 817 | { |
| 818 | return -EINVAL; |
| 819 | } |
| 820 | |
| 821 | static int dummy_unregister_security (const char *name, struct security_operations *ops) |
| 822 | { |
| 823 | return -EINVAL; |
| 824 | } |
| 825 | |
| 826 | static void dummy_d_instantiate (struct dentry *dentry, struct inode *inode) |
| 827 | { |
| 828 | return; |
| 829 | } |
| 830 | |
| 831 | static int dummy_getprocattr(struct task_struct *p, char *name, void *value, size_t size) |
| 832 | { |
| 833 | return -EINVAL; |
| 834 | } |
| 835 | |
| 836 | static int dummy_setprocattr(struct task_struct *p, char *name, void *value, size_t size) |
| 837 | { |
| 838 | return -EINVAL; |
| 839 | } |
| 840 | |
David Howells | 29db919 | 2005-10-30 15:02:44 -0800 | [diff] [blame] | 841 | #ifdef CONFIG_KEYS |
| 842 | static inline int dummy_key_alloc(struct key *key) |
| 843 | { |
| 844 | return 0; |
| 845 | } |
| 846 | |
| 847 | static inline void dummy_key_free(struct key *key) |
| 848 | { |
| 849 | } |
| 850 | |
| 851 | static inline int dummy_key_permission(key_ref_t key_ref, |
| 852 | struct task_struct *context, |
| 853 | key_perm_t perm) |
| 854 | { |
| 855 | return 0; |
| 856 | } |
| 857 | #endif /* CONFIG_KEYS */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 858 | |
| 859 | struct security_operations dummy_security_ops; |
| 860 | |
| 861 | #define set_to_dummy_if_null(ops, function) \ |
| 862 | do { \ |
| 863 | if (!ops->function) { \ |
| 864 | ops->function = dummy_##function; \ |
| 865 | pr_debug("Had to override the " #function \ |
| 866 | " security operation with the dummy one.\n");\ |
| 867 | } \ |
| 868 | } while (0) |
| 869 | |
| 870 | void security_fixup_ops (struct security_operations *ops) |
| 871 | { |
| 872 | set_to_dummy_if_null(ops, ptrace); |
| 873 | set_to_dummy_if_null(ops, capget); |
| 874 | set_to_dummy_if_null(ops, capset_check); |
| 875 | set_to_dummy_if_null(ops, capset_set); |
| 876 | set_to_dummy_if_null(ops, acct); |
| 877 | set_to_dummy_if_null(ops, capable); |
| 878 | set_to_dummy_if_null(ops, quotactl); |
| 879 | set_to_dummy_if_null(ops, quota_on); |
| 880 | set_to_dummy_if_null(ops, sysctl); |
| 881 | set_to_dummy_if_null(ops, syslog); |
| 882 | set_to_dummy_if_null(ops, settime); |
| 883 | set_to_dummy_if_null(ops, vm_enough_memory); |
| 884 | set_to_dummy_if_null(ops, bprm_alloc_security); |
| 885 | set_to_dummy_if_null(ops, bprm_free_security); |
| 886 | set_to_dummy_if_null(ops, bprm_apply_creds); |
| 887 | set_to_dummy_if_null(ops, bprm_post_apply_creds); |
| 888 | set_to_dummy_if_null(ops, bprm_set_security); |
| 889 | set_to_dummy_if_null(ops, bprm_check_security); |
| 890 | set_to_dummy_if_null(ops, bprm_secureexec); |
| 891 | set_to_dummy_if_null(ops, sb_alloc_security); |
| 892 | set_to_dummy_if_null(ops, sb_free_security); |
| 893 | set_to_dummy_if_null(ops, sb_copy_data); |
| 894 | set_to_dummy_if_null(ops, sb_kern_mount); |
| 895 | set_to_dummy_if_null(ops, sb_statfs); |
| 896 | set_to_dummy_if_null(ops, sb_mount); |
| 897 | set_to_dummy_if_null(ops, sb_check_sb); |
| 898 | set_to_dummy_if_null(ops, sb_umount); |
| 899 | set_to_dummy_if_null(ops, sb_umount_close); |
| 900 | set_to_dummy_if_null(ops, sb_umount_busy); |
| 901 | set_to_dummy_if_null(ops, sb_post_remount); |
| 902 | set_to_dummy_if_null(ops, sb_post_mountroot); |
| 903 | set_to_dummy_if_null(ops, sb_post_addmount); |
| 904 | set_to_dummy_if_null(ops, sb_pivotroot); |
| 905 | set_to_dummy_if_null(ops, sb_post_pivotroot); |
| 906 | set_to_dummy_if_null(ops, inode_alloc_security); |
| 907 | set_to_dummy_if_null(ops, inode_free_security); |
Stephen Smalley | 5e41ff9 | 2005-09-09 13:01:35 -0700 | [diff] [blame] | 908 | set_to_dummy_if_null(ops, inode_init_security); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 909 | set_to_dummy_if_null(ops, inode_create); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 910 | set_to_dummy_if_null(ops, inode_link); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 911 | set_to_dummy_if_null(ops, inode_unlink); |
| 912 | set_to_dummy_if_null(ops, inode_symlink); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 913 | set_to_dummy_if_null(ops, inode_mkdir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 914 | set_to_dummy_if_null(ops, inode_rmdir); |
| 915 | set_to_dummy_if_null(ops, inode_mknod); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 916 | set_to_dummy_if_null(ops, inode_rename); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 917 | set_to_dummy_if_null(ops, inode_readlink); |
| 918 | set_to_dummy_if_null(ops, inode_follow_link); |
| 919 | set_to_dummy_if_null(ops, inode_permission); |
| 920 | set_to_dummy_if_null(ops, inode_setattr); |
| 921 | set_to_dummy_if_null(ops, inode_getattr); |
| 922 | set_to_dummy_if_null(ops, inode_delete); |
| 923 | set_to_dummy_if_null(ops, inode_setxattr); |
| 924 | set_to_dummy_if_null(ops, inode_post_setxattr); |
| 925 | set_to_dummy_if_null(ops, inode_getxattr); |
| 926 | set_to_dummy_if_null(ops, inode_listxattr); |
| 927 | set_to_dummy_if_null(ops, inode_removexattr); |
| 928 | set_to_dummy_if_null(ops, inode_getsecurity); |
| 929 | set_to_dummy_if_null(ops, inode_setsecurity); |
| 930 | set_to_dummy_if_null(ops, inode_listsecurity); |
| 931 | set_to_dummy_if_null(ops, file_permission); |
| 932 | set_to_dummy_if_null(ops, file_alloc_security); |
| 933 | set_to_dummy_if_null(ops, file_free_security); |
| 934 | set_to_dummy_if_null(ops, file_ioctl); |
| 935 | set_to_dummy_if_null(ops, file_mmap); |
| 936 | set_to_dummy_if_null(ops, file_mprotect); |
| 937 | set_to_dummy_if_null(ops, file_lock); |
| 938 | set_to_dummy_if_null(ops, file_fcntl); |
| 939 | set_to_dummy_if_null(ops, file_set_fowner); |
| 940 | set_to_dummy_if_null(ops, file_send_sigiotask); |
| 941 | set_to_dummy_if_null(ops, file_receive); |
| 942 | set_to_dummy_if_null(ops, task_create); |
| 943 | set_to_dummy_if_null(ops, task_alloc_security); |
| 944 | set_to_dummy_if_null(ops, task_free_security); |
| 945 | set_to_dummy_if_null(ops, task_setuid); |
| 946 | set_to_dummy_if_null(ops, task_post_setuid); |
| 947 | set_to_dummy_if_null(ops, task_setgid); |
| 948 | set_to_dummy_if_null(ops, task_setpgid); |
| 949 | set_to_dummy_if_null(ops, task_getpgid); |
| 950 | set_to_dummy_if_null(ops, task_getsid); |
| 951 | set_to_dummy_if_null(ops, task_setgroups); |
| 952 | set_to_dummy_if_null(ops, task_setnice); |
| 953 | set_to_dummy_if_null(ops, task_setrlimit); |
| 954 | set_to_dummy_if_null(ops, task_setscheduler); |
| 955 | set_to_dummy_if_null(ops, task_getscheduler); |
| 956 | set_to_dummy_if_null(ops, task_wait); |
| 957 | set_to_dummy_if_null(ops, task_kill); |
| 958 | set_to_dummy_if_null(ops, task_prctl); |
| 959 | set_to_dummy_if_null(ops, task_reparent_to_init); |
| 960 | set_to_dummy_if_null(ops, task_to_inode); |
| 961 | set_to_dummy_if_null(ops, ipc_permission); |
| 962 | set_to_dummy_if_null(ops, msg_msg_alloc_security); |
| 963 | set_to_dummy_if_null(ops, msg_msg_free_security); |
| 964 | set_to_dummy_if_null(ops, msg_queue_alloc_security); |
| 965 | set_to_dummy_if_null(ops, msg_queue_free_security); |
| 966 | set_to_dummy_if_null(ops, msg_queue_associate); |
| 967 | set_to_dummy_if_null(ops, msg_queue_msgctl); |
| 968 | set_to_dummy_if_null(ops, msg_queue_msgsnd); |
| 969 | set_to_dummy_if_null(ops, msg_queue_msgrcv); |
| 970 | set_to_dummy_if_null(ops, shm_alloc_security); |
| 971 | set_to_dummy_if_null(ops, shm_free_security); |
| 972 | set_to_dummy_if_null(ops, shm_associate); |
| 973 | set_to_dummy_if_null(ops, shm_shmctl); |
| 974 | set_to_dummy_if_null(ops, shm_shmat); |
| 975 | set_to_dummy_if_null(ops, sem_alloc_security); |
| 976 | set_to_dummy_if_null(ops, sem_free_security); |
| 977 | set_to_dummy_if_null(ops, sem_associate); |
| 978 | set_to_dummy_if_null(ops, sem_semctl); |
| 979 | set_to_dummy_if_null(ops, sem_semop); |
| 980 | set_to_dummy_if_null(ops, netlink_send); |
| 981 | set_to_dummy_if_null(ops, netlink_recv); |
| 982 | set_to_dummy_if_null(ops, register_security); |
| 983 | set_to_dummy_if_null(ops, unregister_security); |
| 984 | set_to_dummy_if_null(ops, d_instantiate); |
| 985 | set_to_dummy_if_null(ops, getprocattr); |
| 986 | set_to_dummy_if_null(ops, setprocattr); |
| 987 | #ifdef CONFIG_SECURITY_NETWORK |
| 988 | set_to_dummy_if_null(ops, unix_stream_connect); |
| 989 | set_to_dummy_if_null(ops, unix_may_send); |
| 990 | set_to_dummy_if_null(ops, socket_create); |
| 991 | set_to_dummy_if_null(ops, socket_post_create); |
| 992 | set_to_dummy_if_null(ops, socket_bind); |
| 993 | set_to_dummy_if_null(ops, socket_connect); |
| 994 | set_to_dummy_if_null(ops, socket_listen); |
| 995 | set_to_dummy_if_null(ops, socket_accept); |
| 996 | set_to_dummy_if_null(ops, socket_post_accept); |
| 997 | set_to_dummy_if_null(ops, socket_sendmsg); |
| 998 | set_to_dummy_if_null(ops, socket_recvmsg); |
| 999 | set_to_dummy_if_null(ops, socket_getsockname); |
| 1000 | set_to_dummy_if_null(ops, socket_getpeername); |
| 1001 | set_to_dummy_if_null(ops, socket_setsockopt); |
| 1002 | set_to_dummy_if_null(ops, socket_getsockopt); |
| 1003 | set_to_dummy_if_null(ops, socket_shutdown); |
| 1004 | set_to_dummy_if_null(ops, socket_sock_rcv_skb); |
| 1005 | set_to_dummy_if_null(ops, socket_getpeersec); |
| 1006 | set_to_dummy_if_null(ops, sk_alloc_security); |
| 1007 | set_to_dummy_if_null(ops, sk_free_security); |
Trent Jaeger | df71837 | 2005-12-13 23:12:27 -0800 | [diff] [blame] | 1008 | set_to_dummy_if_null(ops, sk_getsid); |
| 1009 | #endif /* CONFIG_SECURITY_NETWORK */ |
| 1010 | #ifdef CONFIG_SECURITY_NETWORK_XFRM |
| 1011 | set_to_dummy_if_null(ops, xfrm_policy_alloc_security); |
| 1012 | set_to_dummy_if_null(ops, xfrm_policy_clone_security); |
| 1013 | set_to_dummy_if_null(ops, xfrm_policy_free_security); |
| 1014 | set_to_dummy_if_null(ops, xfrm_state_alloc_security); |
| 1015 | set_to_dummy_if_null(ops, xfrm_state_free_security); |
| 1016 | set_to_dummy_if_null(ops, xfrm_policy_lookup); |
| 1017 | #endif /* CONFIG_SECURITY_NETWORK_XFRM */ |
David Howells | 29db919 | 2005-10-30 15:02:44 -0800 | [diff] [blame] | 1018 | #ifdef CONFIG_KEYS |
| 1019 | set_to_dummy_if_null(ops, key_alloc); |
| 1020 | set_to_dummy_if_null(ops, key_free); |
| 1021 | set_to_dummy_if_null(ops, key_permission); |
| 1022 | #endif /* CONFIG_KEYS */ |
| 1023 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1024 | } |
| 1025 | |