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 | |
| 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_raised (tsk->cap_effective, cap)) |
| 78 | return 0; |
| 79 | return -EPERM; |
| 80 | } |
| 81 | |
| 82 | static int dummy_sysctl (ctl_table * table, int op) |
| 83 | { |
| 84 | return 0; |
| 85 | } |
| 86 | |
| 87 | static int dummy_quotactl (int cmds, int type, int id, struct super_block *sb) |
| 88 | { |
| 89 | return 0; |
| 90 | } |
| 91 | |
| 92 | static int dummy_quota_on (struct dentry *dentry) |
| 93 | { |
| 94 | return 0; |
| 95 | } |
| 96 | |
| 97 | static int dummy_syslog (int type) |
| 98 | { |
| 99 | if ((type != 3 && type != 10) && current->euid) |
| 100 | return -EPERM; |
| 101 | return 0; |
| 102 | } |
| 103 | |
| 104 | static int dummy_settime(struct timespec *ts, struct timezone *tz) |
| 105 | { |
| 106 | if (!capable(CAP_SYS_TIME)) |
| 107 | return -EPERM; |
| 108 | return 0; |
| 109 | } |
| 110 | |
| 111 | static int dummy_vm_enough_memory(long pages) |
| 112 | { |
| 113 | int cap_sys_admin = 0; |
| 114 | |
| 115 | if (dummy_capable(current, CAP_SYS_ADMIN) == 0) |
| 116 | cap_sys_admin = 1; |
| 117 | return __vm_enough_memory(pages, cap_sys_admin); |
| 118 | } |
| 119 | |
| 120 | static int dummy_bprm_alloc_security (struct linux_binprm *bprm) |
| 121 | { |
| 122 | return 0; |
| 123 | } |
| 124 | |
| 125 | static void dummy_bprm_free_security (struct linux_binprm *bprm) |
| 126 | { |
| 127 | return; |
| 128 | } |
| 129 | |
| 130 | static void dummy_bprm_apply_creds (struct linux_binprm *bprm, int unsafe) |
| 131 | { |
| 132 | if (bprm->e_uid != current->uid || bprm->e_gid != current->gid) { |
Alan Cox | d6e7114 | 2005-06-23 00:09:43 -0700 | [diff] [blame] | 133 | current->mm->dumpable = suid_dumpable; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | |
| 135 | if ((unsafe & ~LSM_UNSAFE_PTRACE_CAP) && !capable(CAP_SETUID)) { |
| 136 | bprm->e_uid = current->uid; |
| 137 | bprm->e_gid = current->gid; |
| 138 | } |
| 139 | } |
| 140 | |
| 141 | current->suid = current->euid = current->fsuid = bprm->e_uid; |
| 142 | current->sgid = current->egid = current->fsgid = bprm->e_gid; |
| 143 | |
| 144 | dummy_capget(current, ¤t->cap_effective, ¤t->cap_inheritable, ¤t->cap_permitted); |
| 145 | } |
| 146 | |
| 147 | static void dummy_bprm_post_apply_creds (struct linux_binprm *bprm) |
| 148 | { |
| 149 | return; |
| 150 | } |
| 151 | |
| 152 | static int dummy_bprm_set_security (struct linux_binprm *bprm) |
| 153 | { |
| 154 | return 0; |
| 155 | } |
| 156 | |
| 157 | static int dummy_bprm_check_security (struct linux_binprm *bprm) |
| 158 | { |
| 159 | return 0; |
| 160 | } |
| 161 | |
| 162 | static int dummy_bprm_secureexec (struct linux_binprm *bprm) |
| 163 | { |
| 164 | /* The new userland will simply use the value provided |
| 165 | in the AT_SECURE field to decide whether secure mode |
| 166 | is required. Hence, this logic is required to preserve |
| 167 | the legacy decision algorithm used by the old userland. */ |
| 168 | return (current->euid != current->uid || |
| 169 | current->egid != current->gid); |
| 170 | } |
| 171 | |
| 172 | static int dummy_sb_alloc_security (struct super_block *sb) |
| 173 | { |
| 174 | return 0; |
| 175 | } |
| 176 | |
| 177 | static void dummy_sb_free_security (struct super_block *sb) |
| 178 | { |
| 179 | return; |
| 180 | } |
| 181 | |
| 182 | static int dummy_sb_copy_data (struct file_system_type *type, |
| 183 | void *orig, void *copy) |
| 184 | { |
| 185 | return 0; |
| 186 | } |
| 187 | |
| 188 | static int dummy_sb_kern_mount (struct super_block *sb, void *data) |
| 189 | { |
| 190 | return 0; |
| 191 | } |
| 192 | |
| 193 | static int dummy_sb_statfs (struct super_block *sb) |
| 194 | { |
| 195 | return 0; |
| 196 | } |
| 197 | |
| 198 | static int dummy_sb_mount (char *dev_name, struct nameidata *nd, char *type, |
| 199 | unsigned long flags, void *data) |
| 200 | { |
| 201 | return 0; |
| 202 | } |
| 203 | |
| 204 | static int dummy_sb_check_sb (struct vfsmount *mnt, struct nameidata *nd) |
| 205 | { |
| 206 | return 0; |
| 207 | } |
| 208 | |
| 209 | static int dummy_sb_umount (struct vfsmount *mnt, int flags) |
| 210 | { |
| 211 | return 0; |
| 212 | } |
| 213 | |
| 214 | static void dummy_sb_umount_close (struct vfsmount *mnt) |
| 215 | { |
| 216 | return; |
| 217 | } |
| 218 | |
| 219 | static void dummy_sb_umount_busy (struct vfsmount *mnt) |
| 220 | { |
| 221 | return; |
| 222 | } |
| 223 | |
| 224 | static void dummy_sb_post_remount (struct vfsmount *mnt, unsigned long flags, |
| 225 | void *data) |
| 226 | { |
| 227 | return; |
| 228 | } |
| 229 | |
| 230 | |
| 231 | static void dummy_sb_post_mountroot (void) |
| 232 | { |
| 233 | return; |
| 234 | } |
| 235 | |
| 236 | static void dummy_sb_post_addmount (struct vfsmount *mnt, struct nameidata *nd) |
| 237 | { |
| 238 | return; |
| 239 | } |
| 240 | |
| 241 | static int dummy_sb_pivotroot (struct nameidata *old_nd, struct nameidata *new_nd) |
| 242 | { |
| 243 | return 0; |
| 244 | } |
| 245 | |
| 246 | static void dummy_sb_post_pivotroot (struct nameidata *old_nd, struct nameidata *new_nd) |
| 247 | { |
| 248 | return; |
| 249 | } |
| 250 | |
| 251 | static int dummy_inode_alloc_security (struct inode *inode) |
| 252 | { |
| 253 | return 0; |
| 254 | } |
| 255 | |
| 256 | static void dummy_inode_free_security (struct inode *inode) |
| 257 | { |
| 258 | return; |
| 259 | } |
| 260 | |
| 261 | static int dummy_inode_create (struct inode *inode, struct dentry *dentry, |
| 262 | int mask) |
| 263 | { |
| 264 | return 0; |
| 265 | } |
| 266 | |
| 267 | static void dummy_inode_post_create (struct inode *inode, struct dentry *dentry, |
| 268 | int mask) |
| 269 | { |
| 270 | return; |
| 271 | } |
| 272 | |
| 273 | static int dummy_inode_link (struct dentry *old_dentry, struct inode *inode, |
| 274 | struct dentry *new_dentry) |
| 275 | { |
| 276 | return 0; |
| 277 | } |
| 278 | |
| 279 | static void dummy_inode_post_link (struct dentry *old_dentry, |
| 280 | struct inode *inode, |
| 281 | struct dentry *new_dentry) |
| 282 | { |
| 283 | return; |
| 284 | } |
| 285 | |
| 286 | static int dummy_inode_unlink (struct inode *inode, struct dentry *dentry) |
| 287 | { |
| 288 | return 0; |
| 289 | } |
| 290 | |
| 291 | static int dummy_inode_symlink (struct inode *inode, struct dentry *dentry, |
| 292 | const char *name) |
| 293 | { |
| 294 | return 0; |
| 295 | } |
| 296 | |
| 297 | static void dummy_inode_post_symlink (struct inode *inode, |
| 298 | struct dentry *dentry, const char *name) |
| 299 | { |
| 300 | return; |
| 301 | } |
| 302 | |
| 303 | static int dummy_inode_mkdir (struct inode *inode, struct dentry *dentry, |
| 304 | int mask) |
| 305 | { |
| 306 | return 0; |
| 307 | } |
| 308 | |
| 309 | static void dummy_inode_post_mkdir (struct inode *inode, struct dentry *dentry, |
| 310 | int mask) |
| 311 | { |
| 312 | return; |
| 313 | } |
| 314 | |
| 315 | static int dummy_inode_rmdir (struct inode *inode, struct dentry *dentry) |
| 316 | { |
| 317 | return 0; |
| 318 | } |
| 319 | |
| 320 | static int dummy_inode_mknod (struct inode *inode, struct dentry *dentry, |
| 321 | int mode, dev_t dev) |
| 322 | { |
| 323 | return 0; |
| 324 | } |
| 325 | |
| 326 | static void dummy_inode_post_mknod (struct inode *inode, struct dentry *dentry, |
| 327 | int mode, dev_t dev) |
| 328 | { |
| 329 | return; |
| 330 | } |
| 331 | |
| 332 | static int dummy_inode_rename (struct inode *old_inode, |
| 333 | struct dentry *old_dentry, |
| 334 | struct inode *new_inode, |
| 335 | struct dentry *new_dentry) |
| 336 | { |
| 337 | return 0; |
| 338 | } |
| 339 | |
| 340 | static void dummy_inode_post_rename (struct inode *old_inode, |
| 341 | struct dentry *old_dentry, |
| 342 | struct inode *new_inode, |
| 343 | struct dentry *new_dentry) |
| 344 | { |
| 345 | return; |
| 346 | } |
| 347 | |
| 348 | static int dummy_inode_readlink (struct dentry *dentry) |
| 349 | { |
| 350 | return 0; |
| 351 | } |
| 352 | |
| 353 | static int dummy_inode_follow_link (struct dentry *dentry, |
| 354 | struct nameidata *nameidata) |
| 355 | { |
| 356 | return 0; |
| 357 | } |
| 358 | |
| 359 | static int dummy_inode_permission (struct inode *inode, int mask, struct nameidata *nd) |
| 360 | { |
| 361 | return 0; |
| 362 | } |
| 363 | |
| 364 | static int dummy_inode_setattr (struct dentry *dentry, struct iattr *iattr) |
| 365 | { |
| 366 | return 0; |
| 367 | } |
| 368 | |
| 369 | static int dummy_inode_getattr (struct vfsmount *mnt, struct dentry *dentry) |
| 370 | { |
| 371 | return 0; |
| 372 | } |
| 373 | |
| 374 | static void dummy_inode_delete (struct inode *ino) |
| 375 | { |
| 376 | return; |
| 377 | } |
| 378 | |
| 379 | static int dummy_inode_setxattr (struct dentry *dentry, char *name, void *value, |
| 380 | size_t size, int flags) |
| 381 | { |
| 382 | if (!strncmp(name, XATTR_SECURITY_PREFIX, |
| 383 | sizeof(XATTR_SECURITY_PREFIX) - 1) && |
| 384 | !capable(CAP_SYS_ADMIN)) |
| 385 | return -EPERM; |
| 386 | return 0; |
| 387 | } |
| 388 | |
| 389 | static void dummy_inode_post_setxattr (struct dentry *dentry, char *name, void *value, |
| 390 | size_t size, int flags) |
| 391 | { |
| 392 | } |
| 393 | |
| 394 | static int dummy_inode_getxattr (struct dentry *dentry, char *name) |
| 395 | { |
| 396 | return 0; |
| 397 | } |
| 398 | |
| 399 | static int dummy_inode_listxattr (struct dentry *dentry) |
| 400 | { |
| 401 | return 0; |
| 402 | } |
| 403 | |
| 404 | static int dummy_inode_removexattr (struct dentry *dentry, char *name) |
| 405 | { |
| 406 | if (!strncmp(name, XATTR_SECURITY_PREFIX, |
| 407 | sizeof(XATTR_SECURITY_PREFIX) - 1) && |
| 408 | !capable(CAP_SYS_ADMIN)) |
| 409 | return -EPERM; |
| 410 | return 0; |
| 411 | } |
| 412 | |
| 413 | static int dummy_inode_getsecurity(struct inode *inode, const char *name, void *buffer, size_t size) |
| 414 | { |
| 415 | return -EOPNOTSUPP; |
| 416 | } |
| 417 | |
| 418 | static int dummy_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags) |
| 419 | { |
| 420 | return -EOPNOTSUPP; |
| 421 | } |
| 422 | |
| 423 | static int dummy_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size) |
| 424 | { |
| 425 | return 0; |
| 426 | } |
| 427 | |
| 428 | static int dummy_file_permission (struct file *file, int mask) |
| 429 | { |
| 430 | return 0; |
| 431 | } |
| 432 | |
| 433 | static int dummy_file_alloc_security (struct file *file) |
| 434 | { |
| 435 | return 0; |
| 436 | } |
| 437 | |
| 438 | static void dummy_file_free_security (struct file *file) |
| 439 | { |
| 440 | return; |
| 441 | } |
| 442 | |
| 443 | static int dummy_file_ioctl (struct file *file, unsigned int command, |
| 444 | unsigned long arg) |
| 445 | { |
| 446 | return 0; |
| 447 | } |
| 448 | |
| 449 | static int dummy_file_mmap (struct file *file, unsigned long reqprot, |
| 450 | unsigned long prot, |
| 451 | unsigned long flags) |
| 452 | { |
| 453 | return 0; |
| 454 | } |
| 455 | |
| 456 | static int dummy_file_mprotect (struct vm_area_struct *vma, |
| 457 | unsigned long reqprot, |
| 458 | unsigned long prot) |
| 459 | { |
| 460 | return 0; |
| 461 | } |
| 462 | |
| 463 | static int dummy_file_lock (struct file *file, unsigned int cmd) |
| 464 | { |
| 465 | return 0; |
| 466 | } |
| 467 | |
| 468 | static int dummy_file_fcntl (struct file *file, unsigned int cmd, |
| 469 | unsigned long arg) |
| 470 | { |
| 471 | return 0; |
| 472 | } |
| 473 | |
| 474 | static int dummy_file_set_fowner (struct file *file) |
| 475 | { |
| 476 | return 0; |
| 477 | } |
| 478 | |
| 479 | static int dummy_file_send_sigiotask (struct task_struct *tsk, |
| 480 | struct fown_struct *fown, int sig) |
| 481 | { |
| 482 | return 0; |
| 483 | } |
| 484 | |
| 485 | static int dummy_file_receive (struct file *file) |
| 486 | { |
| 487 | return 0; |
| 488 | } |
| 489 | |
| 490 | static int dummy_task_create (unsigned long clone_flags) |
| 491 | { |
| 492 | return 0; |
| 493 | } |
| 494 | |
| 495 | static int dummy_task_alloc_security (struct task_struct *p) |
| 496 | { |
| 497 | return 0; |
| 498 | } |
| 499 | |
| 500 | static void dummy_task_free_security (struct task_struct *p) |
| 501 | { |
| 502 | return; |
| 503 | } |
| 504 | |
| 505 | static int dummy_task_setuid (uid_t id0, uid_t id1, uid_t id2, int flags) |
| 506 | { |
| 507 | return 0; |
| 508 | } |
| 509 | |
| 510 | static int dummy_task_post_setuid (uid_t id0, uid_t id1, uid_t id2, int flags) |
| 511 | { |
| 512 | dummy_capget(current, ¤t->cap_effective, ¤t->cap_inheritable, ¤t->cap_permitted); |
| 513 | return 0; |
| 514 | } |
| 515 | |
| 516 | static int dummy_task_setgid (gid_t id0, gid_t id1, gid_t id2, int flags) |
| 517 | { |
| 518 | return 0; |
| 519 | } |
| 520 | |
| 521 | static int dummy_task_setpgid (struct task_struct *p, pid_t pgid) |
| 522 | { |
| 523 | return 0; |
| 524 | } |
| 525 | |
| 526 | static int dummy_task_getpgid (struct task_struct *p) |
| 527 | { |
| 528 | return 0; |
| 529 | } |
| 530 | |
| 531 | static int dummy_task_getsid (struct task_struct *p) |
| 532 | { |
| 533 | return 0; |
| 534 | } |
| 535 | |
| 536 | static int dummy_task_setgroups (struct group_info *group_info) |
| 537 | { |
| 538 | return 0; |
| 539 | } |
| 540 | |
| 541 | static int dummy_task_setnice (struct task_struct *p, int nice) |
| 542 | { |
| 543 | return 0; |
| 544 | } |
| 545 | |
| 546 | static int dummy_task_setrlimit (unsigned int resource, struct rlimit *new_rlim) |
| 547 | { |
| 548 | return 0; |
| 549 | } |
| 550 | |
| 551 | static int dummy_task_setscheduler (struct task_struct *p, int policy, |
| 552 | struct sched_param *lp) |
| 553 | { |
| 554 | return 0; |
| 555 | } |
| 556 | |
| 557 | static int dummy_task_getscheduler (struct task_struct *p) |
| 558 | { |
| 559 | return 0; |
| 560 | } |
| 561 | |
| 562 | static int dummy_task_wait (struct task_struct *p) |
| 563 | { |
| 564 | return 0; |
| 565 | } |
| 566 | |
| 567 | static int dummy_task_kill (struct task_struct *p, struct siginfo *info, |
| 568 | int sig) |
| 569 | { |
| 570 | return 0; |
| 571 | } |
| 572 | |
| 573 | static int dummy_task_prctl (int option, unsigned long arg2, unsigned long arg3, |
| 574 | unsigned long arg4, unsigned long arg5) |
| 575 | { |
| 576 | return 0; |
| 577 | } |
| 578 | |
| 579 | static void dummy_task_reparent_to_init (struct task_struct *p) |
| 580 | { |
| 581 | p->euid = p->fsuid = 0; |
| 582 | return; |
| 583 | } |
| 584 | |
| 585 | static void dummy_task_to_inode(struct task_struct *p, struct inode *inode) |
| 586 | { } |
| 587 | |
| 588 | static int dummy_ipc_permission (struct kern_ipc_perm *ipcp, short flag) |
| 589 | { |
| 590 | return 0; |
| 591 | } |
| 592 | |
| 593 | static int dummy_msg_msg_alloc_security (struct msg_msg *msg) |
| 594 | { |
| 595 | return 0; |
| 596 | } |
| 597 | |
| 598 | static void dummy_msg_msg_free_security (struct msg_msg *msg) |
| 599 | { |
| 600 | return; |
| 601 | } |
| 602 | |
| 603 | static int dummy_msg_queue_alloc_security (struct msg_queue *msq) |
| 604 | { |
| 605 | return 0; |
| 606 | } |
| 607 | |
| 608 | static void dummy_msg_queue_free_security (struct msg_queue *msq) |
| 609 | { |
| 610 | return; |
| 611 | } |
| 612 | |
| 613 | static int dummy_msg_queue_associate (struct msg_queue *msq, |
| 614 | int msqflg) |
| 615 | { |
| 616 | return 0; |
| 617 | } |
| 618 | |
| 619 | static int dummy_msg_queue_msgctl (struct msg_queue *msq, int cmd) |
| 620 | { |
| 621 | return 0; |
| 622 | } |
| 623 | |
| 624 | static int dummy_msg_queue_msgsnd (struct msg_queue *msq, struct msg_msg *msg, |
| 625 | int msgflg) |
| 626 | { |
| 627 | return 0; |
| 628 | } |
| 629 | |
| 630 | static int dummy_msg_queue_msgrcv (struct msg_queue *msq, struct msg_msg *msg, |
| 631 | struct task_struct *target, long type, |
| 632 | int mode) |
| 633 | { |
| 634 | return 0; |
| 635 | } |
| 636 | |
| 637 | static int dummy_shm_alloc_security (struct shmid_kernel *shp) |
| 638 | { |
| 639 | return 0; |
| 640 | } |
| 641 | |
| 642 | static void dummy_shm_free_security (struct shmid_kernel *shp) |
| 643 | { |
| 644 | return; |
| 645 | } |
| 646 | |
| 647 | static int dummy_shm_associate (struct shmid_kernel *shp, int shmflg) |
| 648 | { |
| 649 | return 0; |
| 650 | } |
| 651 | |
| 652 | static int dummy_shm_shmctl (struct shmid_kernel *shp, int cmd) |
| 653 | { |
| 654 | return 0; |
| 655 | } |
| 656 | |
| 657 | static int dummy_shm_shmat (struct shmid_kernel *shp, char __user *shmaddr, |
| 658 | int shmflg) |
| 659 | { |
| 660 | return 0; |
| 661 | } |
| 662 | |
| 663 | static int dummy_sem_alloc_security (struct sem_array *sma) |
| 664 | { |
| 665 | return 0; |
| 666 | } |
| 667 | |
| 668 | static void dummy_sem_free_security (struct sem_array *sma) |
| 669 | { |
| 670 | return; |
| 671 | } |
| 672 | |
| 673 | static int dummy_sem_associate (struct sem_array *sma, int semflg) |
| 674 | { |
| 675 | return 0; |
| 676 | } |
| 677 | |
| 678 | static int dummy_sem_semctl (struct sem_array *sma, int cmd) |
| 679 | { |
| 680 | return 0; |
| 681 | } |
| 682 | |
| 683 | static int dummy_sem_semop (struct sem_array *sma, |
| 684 | struct sembuf *sops, unsigned nsops, int alter) |
| 685 | { |
| 686 | return 0; |
| 687 | } |
| 688 | |
| 689 | static int dummy_netlink_send (struct sock *sk, struct sk_buff *skb) |
| 690 | { |
| 691 | NETLINK_CB(skb).eff_cap = current->cap_effective; |
| 692 | return 0; |
| 693 | } |
| 694 | |
| 695 | static int dummy_netlink_recv (struct sk_buff *skb) |
| 696 | { |
| 697 | if (!cap_raised (NETLINK_CB (skb).eff_cap, CAP_NET_ADMIN)) |
| 698 | return -EPERM; |
| 699 | return 0; |
| 700 | } |
| 701 | |
| 702 | #ifdef CONFIG_SECURITY_NETWORK |
| 703 | static int dummy_unix_stream_connect (struct socket *sock, |
| 704 | struct socket *other, |
| 705 | struct sock *newsk) |
| 706 | { |
| 707 | return 0; |
| 708 | } |
| 709 | |
| 710 | static int dummy_unix_may_send (struct socket *sock, |
| 711 | struct socket *other) |
| 712 | { |
| 713 | return 0; |
| 714 | } |
| 715 | |
| 716 | static int dummy_socket_create (int family, int type, |
| 717 | int protocol, int kern) |
| 718 | { |
| 719 | return 0; |
| 720 | } |
| 721 | |
| 722 | static void dummy_socket_post_create (struct socket *sock, int family, int type, |
| 723 | int protocol, int kern) |
| 724 | { |
| 725 | return; |
| 726 | } |
| 727 | |
| 728 | static int dummy_socket_bind (struct socket *sock, struct sockaddr *address, |
| 729 | int addrlen) |
| 730 | { |
| 731 | return 0; |
| 732 | } |
| 733 | |
| 734 | static int dummy_socket_connect (struct socket *sock, struct sockaddr *address, |
| 735 | int addrlen) |
| 736 | { |
| 737 | return 0; |
| 738 | } |
| 739 | |
| 740 | static int dummy_socket_listen (struct socket *sock, int backlog) |
| 741 | { |
| 742 | return 0; |
| 743 | } |
| 744 | |
| 745 | static int dummy_socket_accept (struct socket *sock, struct socket *newsock) |
| 746 | { |
| 747 | return 0; |
| 748 | } |
| 749 | |
| 750 | static void dummy_socket_post_accept (struct socket *sock, |
| 751 | struct socket *newsock) |
| 752 | { |
| 753 | return; |
| 754 | } |
| 755 | |
| 756 | static int dummy_socket_sendmsg (struct socket *sock, struct msghdr *msg, |
| 757 | int size) |
| 758 | { |
| 759 | return 0; |
| 760 | } |
| 761 | |
| 762 | static int dummy_socket_recvmsg (struct socket *sock, struct msghdr *msg, |
| 763 | int size, int flags) |
| 764 | { |
| 765 | return 0; |
| 766 | } |
| 767 | |
| 768 | static int dummy_socket_getsockname (struct socket *sock) |
| 769 | { |
| 770 | return 0; |
| 771 | } |
| 772 | |
| 773 | static int dummy_socket_getpeername (struct socket *sock) |
| 774 | { |
| 775 | return 0; |
| 776 | } |
| 777 | |
| 778 | static int dummy_socket_setsockopt (struct socket *sock, int level, int optname) |
| 779 | { |
| 780 | return 0; |
| 781 | } |
| 782 | |
| 783 | static int dummy_socket_getsockopt (struct socket *sock, int level, int optname) |
| 784 | { |
| 785 | return 0; |
| 786 | } |
| 787 | |
| 788 | static int dummy_socket_shutdown (struct socket *sock, int how) |
| 789 | { |
| 790 | return 0; |
| 791 | } |
| 792 | |
| 793 | static int dummy_socket_sock_rcv_skb (struct sock *sk, struct sk_buff *skb) |
| 794 | { |
| 795 | return 0; |
| 796 | } |
| 797 | |
| 798 | static int dummy_socket_getpeersec(struct socket *sock, char __user *optval, |
| 799 | int __user *optlen, unsigned len) |
| 800 | { |
| 801 | return -ENOPROTOOPT; |
| 802 | } |
| 803 | |
| 804 | static inline int dummy_sk_alloc_security (struct sock *sk, int family, int priority) |
| 805 | { |
| 806 | return 0; |
| 807 | } |
| 808 | |
| 809 | static inline void dummy_sk_free_security (struct sock *sk) |
| 810 | { |
| 811 | } |
| 812 | #endif /* CONFIG_SECURITY_NETWORK */ |
| 813 | |
| 814 | static int dummy_register_security (const char *name, struct security_operations *ops) |
| 815 | { |
| 816 | return -EINVAL; |
| 817 | } |
| 818 | |
| 819 | static int dummy_unregister_security (const char *name, struct security_operations *ops) |
| 820 | { |
| 821 | return -EINVAL; |
| 822 | } |
| 823 | |
| 824 | static void dummy_d_instantiate (struct dentry *dentry, struct inode *inode) |
| 825 | { |
| 826 | return; |
| 827 | } |
| 828 | |
| 829 | static int dummy_getprocattr(struct task_struct *p, char *name, void *value, size_t size) |
| 830 | { |
| 831 | return -EINVAL; |
| 832 | } |
| 833 | |
| 834 | static int dummy_setprocattr(struct task_struct *p, char *name, void *value, size_t size) |
| 835 | { |
| 836 | return -EINVAL; |
| 837 | } |
| 838 | |
| 839 | |
| 840 | struct security_operations dummy_security_ops; |
| 841 | |
| 842 | #define set_to_dummy_if_null(ops, function) \ |
| 843 | do { \ |
| 844 | if (!ops->function) { \ |
| 845 | ops->function = dummy_##function; \ |
| 846 | pr_debug("Had to override the " #function \ |
| 847 | " security operation with the dummy one.\n");\ |
| 848 | } \ |
| 849 | } while (0) |
| 850 | |
| 851 | void security_fixup_ops (struct security_operations *ops) |
| 852 | { |
| 853 | set_to_dummy_if_null(ops, ptrace); |
| 854 | set_to_dummy_if_null(ops, capget); |
| 855 | set_to_dummy_if_null(ops, capset_check); |
| 856 | set_to_dummy_if_null(ops, capset_set); |
| 857 | set_to_dummy_if_null(ops, acct); |
| 858 | set_to_dummy_if_null(ops, capable); |
| 859 | set_to_dummy_if_null(ops, quotactl); |
| 860 | set_to_dummy_if_null(ops, quota_on); |
| 861 | set_to_dummy_if_null(ops, sysctl); |
| 862 | set_to_dummy_if_null(ops, syslog); |
| 863 | set_to_dummy_if_null(ops, settime); |
| 864 | set_to_dummy_if_null(ops, vm_enough_memory); |
| 865 | set_to_dummy_if_null(ops, bprm_alloc_security); |
| 866 | set_to_dummy_if_null(ops, bprm_free_security); |
| 867 | set_to_dummy_if_null(ops, bprm_apply_creds); |
| 868 | set_to_dummy_if_null(ops, bprm_post_apply_creds); |
| 869 | set_to_dummy_if_null(ops, bprm_set_security); |
| 870 | set_to_dummy_if_null(ops, bprm_check_security); |
| 871 | set_to_dummy_if_null(ops, bprm_secureexec); |
| 872 | set_to_dummy_if_null(ops, sb_alloc_security); |
| 873 | set_to_dummy_if_null(ops, sb_free_security); |
| 874 | set_to_dummy_if_null(ops, sb_copy_data); |
| 875 | set_to_dummy_if_null(ops, sb_kern_mount); |
| 876 | set_to_dummy_if_null(ops, sb_statfs); |
| 877 | set_to_dummy_if_null(ops, sb_mount); |
| 878 | set_to_dummy_if_null(ops, sb_check_sb); |
| 879 | set_to_dummy_if_null(ops, sb_umount); |
| 880 | set_to_dummy_if_null(ops, sb_umount_close); |
| 881 | set_to_dummy_if_null(ops, sb_umount_busy); |
| 882 | set_to_dummy_if_null(ops, sb_post_remount); |
| 883 | set_to_dummy_if_null(ops, sb_post_mountroot); |
| 884 | set_to_dummy_if_null(ops, sb_post_addmount); |
| 885 | set_to_dummy_if_null(ops, sb_pivotroot); |
| 886 | set_to_dummy_if_null(ops, sb_post_pivotroot); |
| 887 | set_to_dummy_if_null(ops, inode_alloc_security); |
| 888 | set_to_dummy_if_null(ops, inode_free_security); |
| 889 | set_to_dummy_if_null(ops, inode_create); |
| 890 | set_to_dummy_if_null(ops, inode_post_create); |
| 891 | set_to_dummy_if_null(ops, inode_link); |
| 892 | set_to_dummy_if_null(ops, inode_post_link); |
| 893 | set_to_dummy_if_null(ops, inode_unlink); |
| 894 | set_to_dummy_if_null(ops, inode_symlink); |
| 895 | set_to_dummy_if_null(ops, inode_post_symlink); |
| 896 | set_to_dummy_if_null(ops, inode_mkdir); |
| 897 | set_to_dummy_if_null(ops, inode_post_mkdir); |
| 898 | set_to_dummy_if_null(ops, inode_rmdir); |
| 899 | set_to_dummy_if_null(ops, inode_mknod); |
| 900 | set_to_dummy_if_null(ops, inode_post_mknod); |
| 901 | set_to_dummy_if_null(ops, inode_rename); |
| 902 | set_to_dummy_if_null(ops, inode_post_rename); |
| 903 | set_to_dummy_if_null(ops, inode_readlink); |
| 904 | set_to_dummy_if_null(ops, inode_follow_link); |
| 905 | set_to_dummy_if_null(ops, inode_permission); |
| 906 | set_to_dummy_if_null(ops, inode_setattr); |
| 907 | set_to_dummy_if_null(ops, inode_getattr); |
| 908 | set_to_dummy_if_null(ops, inode_delete); |
| 909 | set_to_dummy_if_null(ops, inode_setxattr); |
| 910 | set_to_dummy_if_null(ops, inode_post_setxattr); |
| 911 | set_to_dummy_if_null(ops, inode_getxattr); |
| 912 | set_to_dummy_if_null(ops, inode_listxattr); |
| 913 | set_to_dummy_if_null(ops, inode_removexattr); |
| 914 | set_to_dummy_if_null(ops, inode_getsecurity); |
| 915 | set_to_dummy_if_null(ops, inode_setsecurity); |
| 916 | set_to_dummy_if_null(ops, inode_listsecurity); |
| 917 | set_to_dummy_if_null(ops, file_permission); |
| 918 | set_to_dummy_if_null(ops, file_alloc_security); |
| 919 | set_to_dummy_if_null(ops, file_free_security); |
| 920 | set_to_dummy_if_null(ops, file_ioctl); |
| 921 | set_to_dummy_if_null(ops, file_mmap); |
| 922 | set_to_dummy_if_null(ops, file_mprotect); |
| 923 | set_to_dummy_if_null(ops, file_lock); |
| 924 | set_to_dummy_if_null(ops, file_fcntl); |
| 925 | set_to_dummy_if_null(ops, file_set_fowner); |
| 926 | set_to_dummy_if_null(ops, file_send_sigiotask); |
| 927 | set_to_dummy_if_null(ops, file_receive); |
| 928 | set_to_dummy_if_null(ops, task_create); |
| 929 | set_to_dummy_if_null(ops, task_alloc_security); |
| 930 | set_to_dummy_if_null(ops, task_free_security); |
| 931 | set_to_dummy_if_null(ops, task_setuid); |
| 932 | set_to_dummy_if_null(ops, task_post_setuid); |
| 933 | set_to_dummy_if_null(ops, task_setgid); |
| 934 | set_to_dummy_if_null(ops, task_setpgid); |
| 935 | set_to_dummy_if_null(ops, task_getpgid); |
| 936 | set_to_dummy_if_null(ops, task_getsid); |
| 937 | set_to_dummy_if_null(ops, task_setgroups); |
| 938 | set_to_dummy_if_null(ops, task_setnice); |
| 939 | set_to_dummy_if_null(ops, task_setrlimit); |
| 940 | set_to_dummy_if_null(ops, task_setscheduler); |
| 941 | set_to_dummy_if_null(ops, task_getscheduler); |
| 942 | set_to_dummy_if_null(ops, task_wait); |
| 943 | set_to_dummy_if_null(ops, task_kill); |
| 944 | set_to_dummy_if_null(ops, task_prctl); |
| 945 | set_to_dummy_if_null(ops, task_reparent_to_init); |
| 946 | set_to_dummy_if_null(ops, task_to_inode); |
| 947 | set_to_dummy_if_null(ops, ipc_permission); |
| 948 | set_to_dummy_if_null(ops, msg_msg_alloc_security); |
| 949 | set_to_dummy_if_null(ops, msg_msg_free_security); |
| 950 | set_to_dummy_if_null(ops, msg_queue_alloc_security); |
| 951 | set_to_dummy_if_null(ops, msg_queue_free_security); |
| 952 | set_to_dummy_if_null(ops, msg_queue_associate); |
| 953 | set_to_dummy_if_null(ops, msg_queue_msgctl); |
| 954 | set_to_dummy_if_null(ops, msg_queue_msgsnd); |
| 955 | set_to_dummy_if_null(ops, msg_queue_msgrcv); |
| 956 | set_to_dummy_if_null(ops, shm_alloc_security); |
| 957 | set_to_dummy_if_null(ops, shm_free_security); |
| 958 | set_to_dummy_if_null(ops, shm_associate); |
| 959 | set_to_dummy_if_null(ops, shm_shmctl); |
| 960 | set_to_dummy_if_null(ops, shm_shmat); |
| 961 | set_to_dummy_if_null(ops, sem_alloc_security); |
| 962 | set_to_dummy_if_null(ops, sem_free_security); |
| 963 | set_to_dummy_if_null(ops, sem_associate); |
| 964 | set_to_dummy_if_null(ops, sem_semctl); |
| 965 | set_to_dummy_if_null(ops, sem_semop); |
| 966 | set_to_dummy_if_null(ops, netlink_send); |
| 967 | set_to_dummy_if_null(ops, netlink_recv); |
| 968 | set_to_dummy_if_null(ops, register_security); |
| 969 | set_to_dummy_if_null(ops, unregister_security); |
| 970 | set_to_dummy_if_null(ops, d_instantiate); |
| 971 | set_to_dummy_if_null(ops, getprocattr); |
| 972 | set_to_dummy_if_null(ops, setprocattr); |
| 973 | #ifdef CONFIG_SECURITY_NETWORK |
| 974 | set_to_dummy_if_null(ops, unix_stream_connect); |
| 975 | set_to_dummy_if_null(ops, unix_may_send); |
| 976 | set_to_dummy_if_null(ops, socket_create); |
| 977 | set_to_dummy_if_null(ops, socket_post_create); |
| 978 | set_to_dummy_if_null(ops, socket_bind); |
| 979 | set_to_dummy_if_null(ops, socket_connect); |
| 980 | set_to_dummy_if_null(ops, socket_listen); |
| 981 | set_to_dummy_if_null(ops, socket_accept); |
| 982 | set_to_dummy_if_null(ops, socket_post_accept); |
| 983 | set_to_dummy_if_null(ops, socket_sendmsg); |
| 984 | set_to_dummy_if_null(ops, socket_recvmsg); |
| 985 | set_to_dummy_if_null(ops, socket_getsockname); |
| 986 | set_to_dummy_if_null(ops, socket_getpeername); |
| 987 | set_to_dummy_if_null(ops, socket_setsockopt); |
| 988 | set_to_dummy_if_null(ops, socket_getsockopt); |
| 989 | set_to_dummy_if_null(ops, socket_shutdown); |
| 990 | set_to_dummy_if_null(ops, socket_sock_rcv_skb); |
| 991 | set_to_dummy_if_null(ops, socket_getpeersec); |
| 992 | set_to_dummy_if_null(ops, sk_alloc_security); |
| 993 | set_to_dummy_if_null(ops, sk_free_security); |
| 994 | #endif /* CONFIG_SECURITY_NETWORK */ |
| 995 | } |
| 996 | |