1 | /* |
2 | * Copyright (c) 2007-2016 Apple Inc. All rights reserved. |
3 | * |
4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ |
5 | * |
6 | * This file contains Original Code and/or Modifications of Original Code |
7 | * as defined in and that are subject to the Apple Public Source License |
8 | * Version 2.0 (the 'License'). You may not use this file except in |
9 | * compliance with the License. The rights granted to you under the License |
10 | * may not be used to create, or enable the creation or redistribution of, |
11 | * unlawful or unlicensed copies of an Apple operating system, or to |
12 | * circumvent, violate, or enable the circumvention or violation of, any |
13 | * terms of an Apple operating system software license agreement. |
14 | * |
15 | * Please obtain a copy of the License at |
16 | * http://www.opensource.apple.com/apsl/ and read it before using this file. |
17 | * |
18 | * The Original Code and all software distributed under the License are |
19 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
23 | * Please see the License for the specific language governing rights and |
24 | * limitations under the License. |
25 | * |
26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ |
27 | */ |
28 | /*- |
29 | * Copyright (c) 1999, 2000, 2001, 2002 Robert N. M. Watson |
30 | * Copyright (c) 2001 Ilmar S. Habibulin |
31 | * Copyright (c) 2001, 2002, 2003, 2004 Networks Associates Technology, Inc. |
32 | * Copyright (c) 2005 SPARTA, Inc. |
33 | * |
34 | * This software was developed by Robert Watson and Ilmar Habibulin for the |
35 | * TrustedBSD Project. |
36 | * |
37 | * This software was developed for the FreeBSD Project in part by Network |
38 | * Associates Laboratories, the Security Research Division of Network |
39 | * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), |
40 | * as part of the DARPA CHATS research program. |
41 | * |
42 | * Redistribution and use in source and binary forms, with or without |
43 | * modification, are permitted provided that the following conditions |
44 | * are met: |
45 | * 1. Redistributions of source code must retain the above copyright |
46 | * notice, this list of conditions and the following disclaimer. |
47 | * 2. Redistributions in binary form must reproduce the above copyright |
48 | * notice, this list of conditions and the following disclaimer in the |
49 | * documentation and/or other materials provided with the distribution. |
50 | * |
51 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
52 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
53 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
54 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
55 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
56 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
57 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
58 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
59 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
60 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
61 | * SUCH DAMAGE. |
62 | * |
63 | */ |
64 | |
65 | #include <kern/kalloc.h> |
66 | |
67 | #include <sys/param.h> |
68 | #include <sys/systm.h> |
69 | #include <sys/kernel.h> |
70 | #include <sys/proc.h> |
71 | #include <sys/kauth.h> |
72 | |
73 | #include <sys/file_internal.h> |
74 | #include <sys/imgact.h> |
75 | #include <sys/namei.h> |
76 | #include <sys/mount_internal.h> |
77 | #include <sys/pipe.h> |
78 | #include <sys/posix_sem.h> |
79 | #include <sys/posix_shm.h> |
80 | #include <sys/reason.h> |
81 | #include <sys/uio_internal.h> |
82 | #include <sys/vnode_internal.h> |
83 | |
84 | #include <miscfs/devfs/devfsdefs.h> |
85 | #include <miscfs/devfs/fdesc.h> |
86 | |
87 | #include <security/mac_internal.h> |
88 | |
89 | /* convert {R,W,X}_OK values to V{READ,WRITE,EXEC} */ |
90 | #define ACCESS_MODE_TO_VNODE_MASK(m) (m << 6) |
91 | |
92 | static struct label * |
93 | mac_devfsdirent_label_alloc(void) |
94 | { |
95 | struct label *label; |
96 | |
97 | label = mac_labelzone_alloc(MAC_WAITOK); |
98 | if (label == NULL) |
99 | return (NULL); |
100 | MAC_PERFORM(devfs_label_init, label); |
101 | return (label); |
102 | } |
103 | |
104 | void |
105 | mac_devfs_label_init(struct devnode *de) |
106 | { |
107 | |
108 | de->dn_label = mac_devfsdirent_label_alloc(); |
109 | } |
110 | |
111 | static struct label * |
112 | mac_mount_label_alloc(void) |
113 | { |
114 | struct label *label; |
115 | |
116 | label = mac_labelzone_alloc(MAC_WAITOK); |
117 | if (label == NULL) |
118 | return (NULL); |
119 | MAC_PERFORM(mount_label_init, label); |
120 | return (label); |
121 | } |
122 | |
123 | void |
124 | mac_mount_label_init(struct mount *mp) |
125 | { |
126 | |
127 | mp->mnt_mntlabel = mac_mount_label_alloc(); |
128 | } |
129 | |
130 | struct label * |
131 | mac_vnode_label_alloc(void) |
132 | { |
133 | struct label *label; |
134 | |
135 | label = mac_labelzone_alloc(MAC_WAITOK); |
136 | if (label == NULL) |
137 | return (NULL); |
138 | MAC_PERFORM(vnode_label_init, label); |
139 | return (label); |
140 | } |
141 | |
142 | void |
143 | mac_vnode_label_init(vnode_t vp) |
144 | { |
145 | vp->v_label = mac_vnode_label_alloc(); |
146 | } |
147 | |
148 | int |
149 | mac_vnode_label_init_needed(vnode_t vp) |
150 | { |
151 | return (mac_label_vnodes != 0 && vp->v_label == NULL); |
152 | } |
153 | |
154 | /* |
155 | * vnode labels are allocated at the same time as vnodes, but vnodes are never |
156 | * freed. Instead, we want to remove any sensitive information before putting |
157 | * them on the free list for reuse. |
158 | */ |
159 | void |
160 | mac_vnode_label_recycle(vnode_t vp) |
161 | { |
162 | |
163 | MAC_PERFORM(vnode_label_recycle, vp->v_label); |
164 | } |
165 | |
166 | static void |
167 | mac_devfs_label_free(struct label *label) |
168 | { |
169 | MAC_PERFORM(devfs_label_destroy, label); |
170 | mac_labelzone_free(label); |
171 | } |
172 | |
173 | void |
174 | mac_devfs_label_destroy(struct devnode *de) |
175 | { |
176 | if (de->dn_label != NULL) { |
177 | mac_devfs_label_free(de->dn_label); |
178 | de->dn_label = NULL; |
179 | } |
180 | } |
181 | |
182 | static void |
183 | mac_mount_label_free(struct label *label) |
184 | { |
185 | |
186 | MAC_PERFORM(mount_label_destroy, label); |
187 | mac_labelzone_free(label); |
188 | } |
189 | |
190 | void |
191 | mac_mount_label_destroy(struct mount *mp) |
192 | { |
193 | if (mp->mnt_mntlabel != NULL) { |
194 | mac_mount_label_free(mp->mnt_mntlabel); |
195 | mp->mnt_mntlabel = NULL; |
196 | } |
197 | } |
198 | |
199 | void |
200 | mac_vnode_label_free(struct label *label) |
201 | { |
202 | MAC_PERFORM(vnode_label_destroy, label); |
203 | mac_labelzone_free(label); |
204 | } |
205 | |
206 | #ifndef __APPLE__ |
207 | void |
208 | mac_vnode_label_destroy(struct vnode *vp) |
209 | { |
210 | if (vp->v_label != NULL) { |
211 | mac_vnode_label_free(vp->v_label); |
212 | vp->v_label = NULL; |
213 | } |
214 | } |
215 | #endif |
216 | |
217 | void |
218 | mac_vnode_label_copy(struct label *src, struct label *dest) |
219 | { |
220 | if (src == NULL) { |
221 | MAC_PERFORM(vnode_label_init, dest); |
222 | } else { |
223 | MAC_PERFORM(vnode_label_copy, src, dest); |
224 | } |
225 | } |
226 | |
227 | int |
228 | mac_vnode_label_externalize_audit(struct vnode *vp, struct mac *mac) |
229 | { |
230 | int error; |
231 | |
232 | /* It is assumed that any necessary vnode locking is done on entry */ |
233 | error = MAC_EXTERNALIZE_AUDIT(vnode, vp->v_label, |
234 | mac->m_string, mac->m_buflen); |
235 | |
236 | return (error); |
237 | } |
238 | |
239 | int |
240 | mac_vnode_label_externalize(struct label *label, char *elements, |
241 | char *outbuf, size_t outbuflen, int flags __unused) |
242 | { |
243 | int error; |
244 | |
245 | error = MAC_EXTERNALIZE(vnode, label, elements, outbuf, outbuflen); |
246 | |
247 | return (error); |
248 | } |
249 | |
250 | int |
251 | mac_vnode_label_internalize(struct label *label, char *string) |
252 | { |
253 | int error; |
254 | |
255 | error = MAC_INTERNALIZE(vnode, label, string); |
256 | |
257 | return (error); |
258 | } |
259 | |
260 | int |
261 | mac_mount_label_internalize(struct label *label, char *string) |
262 | { |
263 | int error; |
264 | |
265 | error = MAC_INTERNALIZE(mount, label, string); |
266 | |
267 | return (error); |
268 | } |
269 | |
270 | int |
271 | mac_mount_label_externalize(struct label *label, char *elements, |
272 | char *outbuf, size_t outbuflen) |
273 | { |
274 | int error; |
275 | |
276 | error = MAC_EXTERNALIZE(mount, label, elements, outbuf, outbuflen); |
277 | |
278 | return (error); |
279 | } |
280 | |
281 | void |
282 | mac_devfs_label_copy(struct label *src, struct label *dest) |
283 | { |
284 | #if SECURITY_MAC_CHECK_ENFORCE |
285 | /* 21167099 - only check if we allow write */ |
286 | if (!mac_device_enforce) |
287 | return; |
288 | #endif |
289 | |
290 | MAC_PERFORM(devfs_label_copy, src, dest); |
291 | } |
292 | |
293 | void |
294 | mac_devfs_label_update(struct mount *mp, struct devnode *de, |
295 | struct vnode *vp) |
296 | { |
297 | #if SECURITY_MAC_CHECK_ENFORCE |
298 | /* 21167099 - only check if we allow write */ |
299 | if (!mac_device_enforce) |
300 | return; |
301 | #endif |
302 | |
303 | MAC_PERFORM(devfs_label_update, mp, de, de->dn_label, vp, |
304 | vp->v_label); |
305 | } |
306 | |
307 | int |
308 | mac_vnode_label_associate(struct mount *mp, struct vnode *vp, vfs_context_t ctx) |
309 | { |
310 | struct devnode *dnp; |
311 | struct fdescnode *fnp; |
312 | int error = 0; |
313 | |
314 | #if SECURITY_MAC_CHECK_ENFORCE |
315 | /* 21167099 - only check if we allow write */ |
316 | if (!mac_vnode_enforce) |
317 | return (error); |
318 | #endif |
319 | |
320 | /* XXX: should not inspect v_tag in kernel! */ |
321 | switch (vp->v_tag) { |
322 | case VT_DEVFS: |
323 | dnp = VTODN(vp); |
324 | mac_vnode_label_associate_devfs(mp, dnp, vp); |
325 | break; |
326 | case VT_FDESC: |
327 | fnp = VTOFDESC(vp); |
328 | error = mac_vnode_label_associate_fdesc(mp, fnp, vp, ctx); |
329 | break; |
330 | default: |
331 | error = mac_vnode_label_associate_extattr(mp, vp); |
332 | break; |
333 | } |
334 | |
335 | return (error); |
336 | } |
337 | |
338 | void |
339 | mac_vnode_label_associate_devfs(struct mount *mp, struct devnode *de, |
340 | struct vnode *vp) |
341 | { |
342 | #if SECURITY_MAC_CHECK_ENFORCE |
343 | /* 21167099 - only check if we allow write */ |
344 | if (!mac_device_enforce) |
345 | return; |
346 | #endif |
347 | |
348 | MAC_PERFORM(vnode_label_associate_devfs, |
349 | mp, mp ? mp->mnt_mntlabel : NULL, |
350 | de, de->dn_label, |
351 | vp, vp->v_label); |
352 | } |
353 | |
354 | int |
355 | mac_vnode_label_associate_extattr(struct mount *mp, struct vnode *vp) |
356 | { |
357 | int error; |
358 | |
359 | MAC_CHECK(vnode_label_associate_extattr, mp, mp->mnt_mntlabel, vp, |
360 | vp->v_label); |
361 | |
362 | return (error); |
363 | } |
364 | |
365 | void |
366 | mac_vnode_label_associate_singlelabel(struct mount *mp, struct vnode *vp) |
367 | { |
368 | #if SECURITY_MAC_CHECK_ENFORCE |
369 | /* 21167099 - only check if we allow write */ |
370 | if (!mac_vnode_enforce) |
371 | return; |
372 | #endif |
373 | if (!mac_label_vnodes) |
374 | return; |
375 | |
376 | MAC_PERFORM(vnode_label_associate_singlelabel, mp, |
377 | mp ? mp->mnt_mntlabel : NULL, vp, vp->v_label); |
378 | } |
379 | |
380 | int |
381 | mac_vnode_notify_create(vfs_context_t ctx, struct mount *mp, |
382 | struct vnode *dvp, struct vnode *vp, struct componentname *cnp) |
383 | { |
384 | kauth_cred_t cred; |
385 | int error; |
386 | |
387 | #if SECURITY_MAC_CHECK_ENFORCE |
388 | /* 21167099 - only check if we allow write */ |
389 | if (!mac_vnode_enforce) |
390 | return (0); |
391 | #endif |
392 | cred = vfs_context_ucred(ctx); |
393 | if (!mac_cred_check_enforce(cred)) |
394 | return (0); |
395 | MAC_CHECK(vnode_notify_create, cred, mp, mp->mnt_mntlabel, |
396 | dvp, dvp->v_label, vp, vp->v_label, cnp); |
397 | |
398 | return (error); |
399 | } |
400 | |
401 | void |
402 | mac_vnode_notify_rename(vfs_context_t ctx, struct vnode *vp, |
403 | struct vnode *dvp, struct componentname *cnp) |
404 | { |
405 | kauth_cred_t cred; |
406 | |
407 | #if SECURITY_MAC_CHECK_ENFORCE |
408 | /* 21167099 - only check if we allow write */ |
409 | if (!mac_vnode_enforce) |
410 | return; |
411 | #endif |
412 | cred = vfs_context_ucred(ctx); |
413 | if (!mac_cred_check_enforce(cred)) |
414 | return; |
415 | MAC_PERFORM(vnode_notify_rename, cred, vp, vp->v_label, |
416 | dvp, dvp->v_label, cnp); |
417 | } |
418 | |
419 | void |
420 | mac_vnode_notify_open(vfs_context_t ctx, struct vnode *vp, int acc_flags) |
421 | { |
422 | kauth_cred_t cred; |
423 | |
424 | #if SECURITY_MAC_CHECK_ENFORCE |
425 | /* 21167099 - only check if we allow write */ |
426 | if (!mac_vnode_enforce) |
427 | return; |
428 | #endif |
429 | cred = vfs_context_ucred(ctx); |
430 | if (!mac_cred_check_enforce(cred)) |
431 | return; |
432 | MAC_PERFORM(vnode_notify_open, cred, vp, vp->v_label, acc_flags); |
433 | } |
434 | |
435 | void |
436 | mac_vnode_notify_link(vfs_context_t ctx, struct vnode *vp, |
437 | struct vnode *dvp, struct componentname *cnp) |
438 | { |
439 | kauth_cred_t cred; |
440 | |
441 | #if SECURITY_MAC_CHECK_ENFORCE |
442 | /* 21167099 - only check if we allow write */ |
443 | if (!mac_vnode_enforce) |
444 | return; |
445 | #endif |
446 | cred = vfs_context_ucred(ctx); |
447 | if (!mac_cred_check_enforce(cred)) |
448 | return; |
449 | MAC_PERFORM(vnode_notify_link, cred, dvp, dvp->v_label, vp, vp->v_label, cnp); |
450 | } |
451 | |
452 | void |
453 | mac_vnode_notify_deleteextattr(vfs_context_t ctx, struct vnode *vp, const char *name) |
454 | { |
455 | kauth_cred_t cred; |
456 | |
457 | #if SECURITY_MAC_CHECK_ENFORCE |
458 | /* 21167099 - only check if we allow write */ |
459 | if (!mac_vnode_enforce) |
460 | return; |
461 | #endif |
462 | cred = vfs_context_ucred(ctx); |
463 | if (!mac_cred_check_enforce(cred)) |
464 | return; |
465 | MAC_PERFORM(vnode_notify_deleteextattr, cred, vp, vp->v_label, name); |
466 | } |
467 | |
468 | void |
469 | mac_vnode_notify_setacl(vfs_context_t ctx, struct vnode *vp, struct kauth_acl *acl) |
470 | { |
471 | kauth_cred_t cred; |
472 | |
473 | #if SECURITY_MAC_CHECK_ENFORCE |
474 | /* 21167099 - only check if we allow write */ |
475 | if (!mac_vnode_enforce) |
476 | return; |
477 | #endif |
478 | cred = vfs_context_ucred(ctx); |
479 | if (!mac_cred_check_enforce(cred)) |
480 | return; |
481 | MAC_PERFORM(vnode_notify_setacl, cred, vp, vp->v_label, acl); |
482 | } |
483 | |
484 | void |
485 | mac_vnode_notify_setattrlist(vfs_context_t ctx, struct vnode *vp, struct attrlist *alist) |
486 | { |
487 | kauth_cred_t cred; |
488 | |
489 | #if SECURITY_MAC_CHECK_ENFORCE |
490 | /* 21167099 - only check if we allow write */ |
491 | if (!mac_vnode_enforce) |
492 | return; |
493 | #endif |
494 | cred = vfs_context_ucred(ctx); |
495 | if (!mac_cred_check_enforce(cred)) |
496 | return; |
497 | MAC_PERFORM(vnode_notify_setattrlist, cred, vp, vp->v_label, alist); |
498 | } |
499 | |
500 | void |
501 | mac_vnode_notify_setextattr(vfs_context_t ctx, struct vnode *vp, const char *name, struct uio *uio) |
502 | { |
503 | kauth_cred_t cred; |
504 | |
505 | #if SECURITY_MAC_CHECK_ENFORCE |
506 | /* 21167099 - only check if we allow write */ |
507 | if (!mac_vnode_enforce) |
508 | return; |
509 | #endif |
510 | cred = vfs_context_ucred(ctx); |
511 | if (!mac_cred_check_enforce(cred)) |
512 | return; |
513 | MAC_PERFORM(vnode_notify_setextattr, cred, vp, vp->v_label, name, uio); |
514 | } |
515 | |
516 | void |
517 | mac_vnode_notify_setflags(vfs_context_t ctx, struct vnode *vp, u_long flags) |
518 | { |
519 | kauth_cred_t cred; |
520 | |
521 | #if SECURITY_MAC_CHECK_ENFORCE |
522 | /* 21167099 - only check if we allow write */ |
523 | if (!mac_vnode_enforce) |
524 | return; |
525 | #endif |
526 | cred = vfs_context_ucred(ctx); |
527 | if (!mac_cred_check_enforce(cred)) |
528 | return; |
529 | MAC_PERFORM(vnode_notify_setflags, cred, vp, vp->v_label, flags); |
530 | } |
531 | |
532 | void |
533 | mac_vnode_notify_setmode(vfs_context_t ctx, struct vnode *vp, mode_t mode) |
534 | { |
535 | kauth_cred_t cred; |
536 | |
537 | #if SECURITY_MAC_CHECK_ENFORCE |
538 | /* 21167099 - only check if we allow write */ |
539 | if (!mac_vnode_enforce) |
540 | return; |
541 | #endif |
542 | cred = vfs_context_ucred(ctx); |
543 | if (!mac_cred_check_enforce(cred)) |
544 | return; |
545 | MAC_PERFORM(vnode_notify_setmode, cred, vp, vp->v_label, mode); |
546 | } |
547 | |
548 | void |
549 | mac_vnode_notify_setowner(vfs_context_t ctx, struct vnode *vp, uid_t uid, gid_t gid) |
550 | { |
551 | kauth_cred_t cred; |
552 | |
553 | #if SECURITY_MAC_CHECK_ENFORCE |
554 | /* 21167099 - only check if we allow write */ |
555 | if (!mac_vnode_enforce) |
556 | return; |
557 | #endif |
558 | cred = vfs_context_ucred(ctx); |
559 | if (!mac_cred_check_enforce(cred)) |
560 | return; |
561 | MAC_PERFORM(vnode_notify_setowner, cred, vp, vp->v_label, uid, gid); |
562 | } |
563 | |
564 | void |
565 | mac_vnode_notify_setutimes(vfs_context_t ctx, struct vnode *vp, struct timespec atime, struct timespec mtime) |
566 | { |
567 | kauth_cred_t cred; |
568 | |
569 | #if SECURITY_MAC_CHECK_ENFORCE |
570 | /* 21167099 - only check if we allow write */ |
571 | if (!mac_vnode_enforce) |
572 | return; |
573 | #endif |
574 | cred = vfs_context_ucred(ctx); |
575 | if (!mac_cred_check_enforce(cred)) |
576 | return; |
577 | MAC_PERFORM(vnode_notify_setutimes, cred, vp, vp->v_label, atime, mtime); |
578 | } |
579 | |
580 | void |
581 | mac_vnode_notify_truncate(vfs_context_t ctx, kauth_cred_t file_cred, struct vnode *vp) |
582 | { |
583 | kauth_cred_t cred; |
584 | |
585 | #if SECURITY_MAC_CHECK_ENFORCE |
586 | /* 21167099 - only check if we allow write */ |
587 | if (!mac_vnode_enforce) |
588 | return; |
589 | #endif |
590 | cred = vfs_context_ucred(ctx); |
591 | if (!mac_cred_check_enforce(cred)) |
592 | return; |
593 | MAC_PERFORM(vnode_notify_truncate, cred, file_cred, vp, vp->v_label); |
594 | } |
595 | |
596 | /* |
597 | * Extended attribute 'name' was updated via |
598 | * vn_setxattr() or vn_removexattr(). Allow the |
599 | * policy to update the vnode label. |
600 | */ |
601 | void |
602 | mac_vnode_label_update_extattr(struct mount *mp, struct vnode *vp, |
603 | const char *name) |
604 | { |
605 | int error = 0; |
606 | |
607 | #if SECURITY_MAC_CHECK_ENFORCE |
608 | /* 21167099 - only check if we allow write */ |
609 | if (!mac_vnode_enforce) |
610 | return; |
611 | #endif |
612 | if (!mac_label_vnodes) |
613 | return; |
614 | |
615 | MAC_PERFORM(vnode_label_update_extattr, mp, mp->mnt_mntlabel, vp, |
616 | vp->v_label, name); |
617 | if (error == 0) |
618 | return; |
619 | |
620 | vnode_lock(vp); |
621 | vnode_relabel(vp); |
622 | vnode_unlock(vp); |
623 | return; |
624 | } |
625 | |
626 | static int |
627 | mac_vnode_label_store(vfs_context_t ctx, struct vnode *vp, |
628 | struct label *intlabel) |
629 | { |
630 | kauth_cred_t cred; |
631 | int error; |
632 | |
633 | #if SECURITY_MAC_CHECK_ENFORCE |
634 | /* 21167099 - only check if we allow write */ |
635 | if (!mac_vnode_enforce) |
636 | return 0; |
637 | #endif |
638 | if (!mac_label_vnodes) |
639 | return 0; |
640 | |
641 | cred = vfs_context_ucred(ctx); |
642 | if (!mac_cred_check_enforce(cred)) |
643 | return (0); |
644 | MAC_CHECK(vnode_label_store, cred, vp, vp->v_label, intlabel); |
645 | |
646 | return (error); |
647 | } |
648 | |
649 | void |
650 | mac_cred_label_update_execve(vfs_context_t ctx, kauth_cred_t new, struct vnode *vp, off_t offset, |
651 | struct vnode *scriptvp, struct label *scriptvnodelabel, struct label *execl, u_int *csflags, |
652 | void *macextensions, int *disjoint, int *labelupdateerror) |
653 | { |
654 | kauth_cred_t cred; |
655 | *disjoint = 0; |
656 | int error; |
657 | posix_cred_t pcred = posix_cred_get(new); |
658 | |
659 | #if SECURITY_MAC_CHECK_ENFORCE |
660 | /* 21167099 - only check if we allow write */ |
661 | if (!mac_proc_enforce || !mac_vnode_enforce) |
662 | return; |
663 | #endif |
664 | |
665 | /* mark the new cred to indicate "matching" includes the label */ |
666 | pcred->cr_flags |= CRF_MAC_ENFORCE; |
667 | |
668 | cred = vfs_context_ucred(ctx); |
669 | |
670 | /* |
671 | * NB: Cannot use MAC_CHECK macro because we need a sequence point after |
672 | * calling exec_spawnattr_getmacpolicyinfo() and before passing the |
673 | * spawnattrlen as an argument to the hook. |
674 | */ |
675 | { |
676 | struct mac_policy_conf *mpc; |
677 | u_int i; |
678 | |
679 | error = 0; |
680 | for (i = 0; i< mac_policy_list.staticmax; i++) { |
681 | mpc = mac_policy_list.entries[i].mpc; |
682 | if (mpc == NULL) |
683 | continue; |
684 | |
685 | mpo_cred_label_update_execve_t *hook = mpc->mpc_ops->mpo_cred_label_update_execve; |
686 | if (hook == NULL) |
687 | continue; |
688 | |
689 | size_t spawnattrlen = 0; |
690 | void *spawnattr = exec_spawnattr_getmacpolicyinfo(macextensions, mpc->mpc_name, &spawnattrlen); |
691 | |
692 | error = mac_error_select(hook(cred, new, vfs_context_proc(ctx), vp, offset, scriptvp, |
693 | vp->v_label, scriptvnodelabel, execl, csflags, spawnattr, spawnattrlen, disjoint), |
694 | error); |
695 | } |
696 | if (mac_policy_list_conditional_busy() != 0) { |
697 | for (; i <= mac_policy_list.maxindex; i++) { |
698 | mpc = mac_policy_list.entries[i].mpc; |
699 | if (mpc == NULL) |
700 | continue; |
701 | |
702 | mpo_cred_label_update_execve_t *hook = mpc->mpc_ops->mpo_cred_label_update_execve; |
703 | if (hook == NULL) |
704 | continue; |
705 | |
706 | size_t spawnattrlen = 0; |
707 | void *spawnattr = exec_spawnattr_getmacpolicyinfo(macextensions, mpc->mpc_name, &spawnattrlen); |
708 | |
709 | error = mac_error_select(hook(cred, new, vfs_context_proc(ctx), vp, offset, scriptvp, |
710 | vp->v_label, scriptvnodelabel, execl, csflags, spawnattr, spawnattrlen, disjoint), |
711 | error); |
712 | } |
713 | mac_policy_list_unbusy(); |
714 | } |
715 | } |
716 | *labelupdateerror = error; |
717 | } |
718 | |
719 | int |
720 | mac_cred_check_label_update_execve(vfs_context_t ctx, struct vnode *vp, off_t offset, |
721 | struct vnode *scriptvp, struct label *scriptvnodelabel, struct label *execlabel, |
722 | struct proc *p, void *macextensions) |
723 | { |
724 | kauth_cred_t cred; |
725 | int result = 0; |
726 | |
727 | #if SECURITY_MAC_CHECK_ENFORCE |
728 | /* 21167099 - only check if we allow write */ |
729 | if (!mac_proc_enforce || !mac_vnode_enforce) |
730 | return result; |
731 | #endif |
732 | |
733 | cred = vfs_context_ucred(ctx); |
734 | |
735 | /* |
736 | * NB: Cannot use MAC_BOOLEAN macro because we need a sequence point after |
737 | * calling exec_spawnattr_getmacpolicyinfo() and before passing the |
738 | * spawnattrlen as an argument to the hook. |
739 | */ |
740 | { |
741 | struct mac_policy_conf *mpc; |
742 | u_int i; |
743 | |
744 | for (i = 0; i< mac_policy_list.staticmax; i++) { |
745 | mpc = mac_policy_list.entries[i].mpc; |
746 | if (mpc == NULL) |
747 | continue; |
748 | |
749 | mpo_cred_check_label_update_execve_t *hook = mpc->mpc_ops->mpo_cred_check_label_update_execve; |
750 | if (hook == NULL) |
751 | continue; |
752 | |
753 | size_t spawnattrlen = 0; |
754 | void *spawnattr = exec_spawnattr_getmacpolicyinfo(macextensions, mpc->mpc_name, &spawnattrlen); |
755 | |
756 | result = result || hook(cred, vp, offset, scriptvp, vp->v_label, scriptvnodelabel, execlabel, p, spawnattr, spawnattrlen); |
757 | } |
758 | if (mac_policy_list_conditional_busy() != 0) { |
759 | for (; i <= mac_policy_list.maxindex; i++) { |
760 | mpc = mac_policy_list.entries[i].mpc; |
761 | if (mpc == NULL) |
762 | continue; |
763 | |
764 | mpo_cred_check_label_update_execve_t *hook = mpc->mpc_ops->mpo_cred_check_label_update_execve; |
765 | if (hook == NULL) |
766 | continue; |
767 | |
768 | size_t spawnattrlen = 0; |
769 | void *spawnattr = exec_spawnattr_getmacpolicyinfo(macextensions, mpc->mpc_name, &spawnattrlen); |
770 | |
771 | result = result || hook(cred, vp, offset, scriptvp, vp->v_label, scriptvnodelabel, execlabel, p, spawnattr, spawnattrlen); |
772 | } |
773 | mac_policy_list_unbusy(); |
774 | } |
775 | } |
776 | |
777 | return (result); |
778 | } |
779 | |
780 | int |
781 | mac_vnode_check_access(vfs_context_t ctx, struct vnode *vp, |
782 | int acc_mode) |
783 | { |
784 | kauth_cred_t cred; |
785 | int error; |
786 | int mask; |
787 | |
788 | #if SECURITY_MAC_CHECK_ENFORCE |
789 | /* 21167099 - only check if we allow write */ |
790 | if (!mac_vnode_enforce) |
791 | return 0; |
792 | #endif |
793 | cred = vfs_context_ucred(ctx); |
794 | if (!mac_cred_check_enforce(cred)) |
795 | return (0); |
796 | /* Convert {R,W,X}_OK values to V{READ,WRITE,EXEC} for entry points */ |
797 | mask = ACCESS_MODE_TO_VNODE_MASK(acc_mode); |
798 | MAC_CHECK(vnode_check_access, cred, vp, vp->v_label, mask); |
799 | return (error); |
800 | } |
801 | |
802 | int |
803 | mac_vnode_check_chdir(vfs_context_t ctx, struct vnode *dvp) |
804 | { |
805 | kauth_cred_t cred; |
806 | int error; |
807 | |
808 | #if SECURITY_MAC_CHECK_ENFORCE |
809 | /* 21167099 - only check if we allow write */ |
810 | if (!mac_vnode_enforce) |
811 | return 0; |
812 | #endif |
813 | cred = vfs_context_ucred(ctx); |
814 | if (!mac_cred_check_enforce(cred)) |
815 | return (0); |
816 | MAC_CHECK(vnode_check_chdir, cred, dvp, dvp->v_label); |
817 | return (error); |
818 | } |
819 | |
820 | int |
821 | mac_vnode_check_chroot(vfs_context_t ctx, struct vnode *dvp, |
822 | struct componentname *cnp) |
823 | { |
824 | kauth_cred_t cred; |
825 | int error; |
826 | |
827 | #if SECURITY_MAC_CHECK_ENFORCE |
828 | /* 21167099 - only check if we allow write */ |
829 | if (!mac_vnode_enforce) |
830 | return 0; |
831 | #endif |
832 | cred = vfs_context_ucred(ctx); |
833 | if (!mac_cred_check_enforce(cred)) |
834 | return (0); |
835 | MAC_CHECK(vnode_check_chroot, cred, dvp, dvp->v_label, cnp); |
836 | return (error); |
837 | } |
838 | |
839 | int |
840 | mac_vnode_check_clone(vfs_context_t ctx, struct vnode *dvp, |
841 | struct vnode *vp, struct componentname *cnp) |
842 | { |
843 | kauth_cred_t cred; |
844 | int error; |
845 | |
846 | #if SECURITY_MAC_CHECK_ENFORCE |
847 | /* 21167099 - only check if we allow write */ |
848 | if (!mac_vnode_enforce) |
849 | return 0; |
850 | #endif |
851 | cred = vfs_context_ucred(ctx); |
852 | if (!mac_cred_check_enforce(cred)) |
853 | return (0); |
854 | MAC_CHECK(vnode_check_clone, cred, dvp, dvp->v_label, vp, |
855 | vp->v_label, cnp); |
856 | return (error); |
857 | } |
858 | int |
859 | mac_vnode_check_create(vfs_context_t ctx, struct vnode *dvp, |
860 | struct componentname *cnp, struct vnode_attr *vap) |
861 | { |
862 | kauth_cred_t cred; |
863 | int error; |
864 | |
865 | #if SECURITY_MAC_CHECK_ENFORCE |
866 | /* 21167099 - only check if we allow write */ |
867 | if (!mac_vnode_enforce) |
868 | return 0; |
869 | #endif |
870 | cred = vfs_context_ucred(ctx); |
871 | if (!mac_cred_check_enforce(cred)) |
872 | return (0); |
873 | MAC_CHECK(vnode_check_create, cred, dvp, dvp->v_label, cnp, vap); |
874 | return (error); |
875 | } |
876 | |
877 | int |
878 | mac_vnode_check_unlink(vfs_context_t ctx, struct vnode *dvp, struct vnode *vp, |
879 | struct componentname *cnp) |
880 | { |
881 | kauth_cred_t cred; |
882 | int error; |
883 | |
884 | #if SECURITY_MAC_CHECK_ENFORCE |
885 | /* 21167099 - only check if we allow write */ |
886 | if (!mac_vnode_enforce) |
887 | return 0; |
888 | #endif |
889 | cred = vfs_context_ucred(ctx); |
890 | if (!mac_cred_check_enforce(cred)) |
891 | return (0); |
892 | MAC_CHECK(vnode_check_unlink, cred, dvp, dvp->v_label, vp, |
893 | vp->v_label, cnp); |
894 | return (error); |
895 | } |
896 | #if 0 |
897 | int |
898 | mac_vnode_check_deleteacl(vfs_context_t ctx, struct vnode *vp, |
899 | acl_type_t type) |
900 | { |
901 | kauth_cred_t cred; |
902 | int error; |
903 | |
904 | #if SECURITY_MAC_CHECK_ENFORCE |
905 | /* 21167099 - only check if we allow write */ |
906 | if (!mac_vnode_enforce) |
907 | return 0; |
908 | #endif |
909 | cred = vfs_context_ucred(ctx); |
910 | if (!mac_cred_check_enforce(cred)) |
911 | return (0); |
912 | MAC_CHECK(vnode_check_deleteacl, cred, vp, vp->v_label, type); |
913 | return (error); |
914 | } |
915 | #endif |
916 | |
917 | int |
918 | mac_vnode_check_deleteextattr(vfs_context_t ctx, struct vnode *vp, |
919 | const char *name) |
920 | { |
921 | kauth_cred_t cred; |
922 | int error; |
923 | |
924 | #if SECURITY_MAC_CHECK_ENFORCE |
925 | /* 21167099 - only check if we allow write */ |
926 | if (!mac_vnode_enforce) |
927 | return 0; |
928 | #endif |
929 | cred = vfs_context_ucred(ctx); |
930 | if (!mac_cred_check_enforce(cred)) |
931 | return (0); |
932 | MAC_CHECK(vnode_check_deleteextattr, cred, vp, vp->v_label, name); |
933 | return (error); |
934 | } |
935 | int |
936 | mac_vnode_check_exchangedata(vfs_context_t ctx, |
937 | struct vnode *v1, struct vnode *v2) |
938 | { |
939 | kauth_cred_t cred; |
940 | int error; |
941 | |
942 | #if SECURITY_MAC_CHECK_ENFORCE |
943 | /* 21167099 - only check if we allow write */ |
944 | if (!mac_vnode_enforce) |
945 | return 0; |
946 | #endif |
947 | cred = vfs_context_ucred(ctx); |
948 | if (!mac_cred_check_enforce(cred)) |
949 | return (0); |
950 | MAC_CHECK(vnode_check_exchangedata, cred, v1, v1->v_label, |
951 | v2, v2->v_label); |
952 | |
953 | return (error); |
954 | } |
955 | |
956 | #if 0 |
957 | int |
958 | mac_vnode_check_getacl(vfs_context_t ctx, struct vnode *vp, acl_type_t type) |
959 | { |
960 | kauth_cred_t cred; |
961 | int error; |
962 | |
963 | #if SECURITY_MAC_CHECK_ENFORCE |
964 | /* 21167099 - only check if we allow write */ |
965 | if (!mac_vnode_enforce) |
966 | return 0; |
967 | #endif |
968 | cred = vfs_context_ucred(ctx); |
969 | if (!mac_cred_check_enforce(cred)) |
970 | return (0); |
971 | MAC_CHECK(vnode_check_getacl, cred, vp, vp->v_label, type); |
972 | return (error); |
973 | } |
974 | #endif |
975 | |
976 | int |
977 | mac_vnode_check_getattr(vfs_context_t ctx, struct ucred *file_cred, |
978 | struct vnode *vp, struct vnode_attr *va) |
979 | { |
980 | kauth_cred_t cred; |
981 | int error; |
982 | |
983 | #if SECURITY_MAC_CHECK_ENFORCE |
984 | /* 21167099 - only check if we allow write */ |
985 | if (!mac_vnode_enforce) |
986 | return 0; |
987 | #endif |
988 | cred = vfs_context_ucred(ctx); |
989 | if (!mac_cred_check_enforce(cred)) |
990 | return (0); |
991 | MAC_CHECK(vnode_check_getattr, cred, file_cred, vp, vp->v_label, va); |
992 | return (error); |
993 | } |
994 | |
995 | int |
996 | mac_vnode_check_getattrlist(vfs_context_t ctx, struct vnode *vp, |
997 | struct attrlist *alist) |
998 | { |
999 | kauth_cred_t cred; |
1000 | int error; |
1001 | |
1002 | #if SECURITY_MAC_CHECK_ENFORCE |
1003 | /* 21167099 - only check if we allow write */ |
1004 | if (!mac_vnode_enforce) |
1005 | return 0; |
1006 | #endif |
1007 | cred = vfs_context_ucred(ctx); |
1008 | if (!mac_cred_check_enforce(cred)) |
1009 | return (0); |
1010 | MAC_CHECK(vnode_check_getattrlist, cred, vp, vp->v_label, alist); |
1011 | |
1012 | /* Falsify results instead of returning error? */ |
1013 | return (error); |
1014 | } |
1015 | |
1016 | int |
1017 | mac_vnode_check_exec(vfs_context_t ctx, struct vnode *vp, |
1018 | struct image_params *imgp) |
1019 | { |
1020 | kauth_cred_t cred; |
1021 | int error = 0; |
1022 | |
1023 | #if SECURITY_MAC_CHECK_ENFORCE |
1024 | /* 21167099 - only check if we allow write */ |
1025 | if (!mac_proc_enforce || !mac_vnode_enforce) |
1026 | return 0; |
1027 | #endif |
1028 | |
1029 | cred = vfs_context_ucred(ctx); |
1030 | |
1031 | /* |
1032 | * NB: Cannot use MAC_CHECK macro because we need a sequence point after |
1033 | * calling exec_spawnattr_getmacpolicyinfo() and before passing the |
1034 | * spawnattrlen as an argument to the hook. |
1035 | */ |
1036 | { |
1037 | struct mac_policy_conf *mpc; |
1038 | u_int i; |
1039 | |
1040 | for (i = 0; i< mac_policy_list.staticmax; i++) { |
1041 | mpc = mac_policy_list.entries[i].mpc; |
1042 | if (mpc == NULL) |
1043 | continue; |
1044 | |
1045 | mpo_vnode_check_exec_t *hook = mpc->mpc_ops->mpo_vnode_check_exec; |
1046 | if (hook == NULL) |
1047 | continue; |
1048 | |
1049 | size_t spawnattrlen = 0; |
1050 | void *spawnattr = exec_spawnattr_getmacpolicyinfo(imgp->ip_px_smpx, mpc->mpc_name, &spawnattrlen); |
1051 | |
1052 | error = mac_error_select( |
1053 | hook(cred, |
1054 | vp, imgp->ip_scriptvp, vp->v_label, imgp->ip_scriptlabelp, |
1055 | imgp->ip_execlabelp, &imgp->ip_ndp->ni_cnd, &imgp->ip_csflags, |
1056 | spawnattr, spawnattrlen), error); |
1057 | } |
1058 | if (mac_policy_list_conditional_busy() != 0) { |
1059 | for (; i <= mac_policy_list.maxindex; i++) { |
1060 | mpc = mac_policy_list.entries[i].mpc; |
1061 | if (mpc == NULL) |
1062 | continue; |
1063 | |
1064 | mpo_vnode_check_exec_t *hook = mpc->mpc_ops->mpo_vnode_check_exec; |
1065 | if (hook == NULL) |
1066 | continue; |
1067 | |
1068 | size_t spawnattrlen = 0; |
1069 | void *spawnattr = exec_spawnattr_getmacpolicyinfo(imgp->ip_px_smpx, mpc->mpc_name, &spawnattrlen); |
1070 | |
1071 | error = mac_error_select( |
1072 | hook(cred, |
1073 | vp, imgp->ip_scriptvp, vp->v_label, imgp->ip_scriptlabelp, |
1074 | imgp->ip_execlabelp, &imgp->ip_ndp->ni_cnd, &imgp->ip_csflags, |
1075 | spawnattr, spawnattrlen), error); |
1076 | } |
1077 | mac_policy_list_unbusy(); |
1078 | } |
1079 | } |
1080 | |
1081 | return (error); |
1082 | } |
1083 | |
1084 | int |
1085 | mac_vnode_check_fsgetpath(vfs_context_t ctx, struct vnode *vp) |
1086 | { |
1087 | kauth_cred_t cred; |
1088 | int error; |
1089 | |
1090 | #if SECURITY_MAC_CHECK_ENFORCE |
1091 | /* 21167099 - only check if we allow write */ |
1092 | if (!mac_vnode_enforce) |
1093 | return 0; |
1094 | #endif |
1095 | cred = vfs_context_ucred(ctx); |
1096 | if (!mac_cred_check_enforce(cred)) |
1097 | return (0); |
1098 | MAC_CHECK(vnode_check_fsgetpath, cred, vp, vp->v_label); |
1099 | return (error); |
1100 | } |
1101 | |
1102 | int |
1103 | mac_vnode_check_signature(struct vnode *vp, struct cs_blob *cs_blob, |
1104 | struct image_params *imgp, |
1105 | unsigned int *cs_flags, unsigned int *signer_type, |
1106 | int flags) |
1107 | { |
1108 | int error; |
1109 | char *fatal_failure_desc = NULL; |
1110 | size_t fatal_failure_desc_len = 0; |
1111 | |
1112 | char *vn_path = NULL; |
1113 | vm_size_t vn_pathlen = MAXPATHLEN; |
1114 | cpu_type_t cpu_type = (imgp == NULL) ? CPU_TYPE_ANY : imgp->ip_origcputype; |
1115 | |
1116 | |
1117 | #if SECURITY_MAC_CHECK_ENFORCE |
1118 | /* 21167099 - only check if we allow write */ |
1119 | if (!mac_proc_enforce || !mac_vnode_enforce) |
1120 | return 0; |
1121 | #endif |
1122 | |
1123 | MAC_CHECK(vnode_check_signature, vp, vp->v_label, cpu_type, cs_blob, |
1124 | cs_flags, signer_type, flags, &fatal_failure_desc, &fatal_failure_desc_len); |
1125 | |
1126 | if (fatal_failure_desc_len) { |
1127 | // A fatal code signature validation failure occured, formulate a crash |
1128 | // reason. |
1129 | |
1130 | char const *path = NULL; |
1131 | |
1132 | vn_path = (char *)kalloc(MAXPATHLEN); |
1133 | if (vn_path != NULL) { |
1134 | if (vn_getpath(vp, vn_path, (int*)&vn_pathlen) == 0) { |
1135 | path = vn_path; |
1136 | } else { |
1137 | path = "(get vnode path failed)" ; |
1138 | } |
1139 | } else { |
1140 | path = "(path alloc failed)" ; |
1141 | } |
1142 | |
1143 | if (error == 0) { |
1144 | panic("mac_vnode_check_signature: MAC hook returned no error, " |
1145 | "but status is claimed to be fatal? " |
1146 | "path: '%s', fatal_failure_desc_len: %ld, fatal_failure_desc:\n%s\n" , |
1147 | path, fatal_failure_desc_len, fatal_failure_desc); |
1148 | } |
1149 | |
1150 | printf("mac_vnode_check_signature: %s: code signature validation failed fatally: %s" , |
1151 | path, fatal_failure_desc); |
1152 | |
1153 | if (imgp == NULL) { |
1154 | goto out; |
1155 | } |
1156 | |
1157 | os_reason_t reason = os_reason_create(OS_REASON_CODESIGNING, |
1158 | CODESIGNING_EXIT_REASON_TASKGATED_INVALID_SIG); |
1159 | |
1160 | if (reason == OS_REASON_NULL) { |
1161 | printf("mac_vnode_check_signature: %s: failure to allocate exit reason for validation failure: %s\n" , |
1162 | path, fatal_failure_desc); |
1163 | goto out; |
1164 | } |
1165 | |
1166 | imgp->ip_cs_error = reason; |
1167 | reason->osr_flags = (OS_REASON_FLAG_GENERATE_CRASH_REPORT | |
1168 | OS_REASON_FLAG_CONSISTENT_FAILURE); |
1169 | |
1170 | if (fatal_failure_desc == NULL) { |
1171 | // This may happen if allocation for the buffer failed. |
1172 | printf("mac_vnode_check_signature: %s: fatal failure is missing its description.\n" , path); |
1173 | } else { |
1174 | mach_vm_address_t data_addr = 0; |
1175 | |
1176 | int reason_error = 0; |
1177 | int kcdata_error = 0; |
1178 | |
1179 | if ((reason_error = os_reason_alloc_buffer_noblock(reason, kcdata_estimate_required_buffer_size |
1180 | (1, fatal_failure_desc_len))) == 0 && |
1181 | (kcdata_error = kcdata_get_memory_addr(&reason->osr_kcd_descriptor, |
1182 | EXIT_REASON_USER_DESC, fatal_failure_desc_len, |
1183 | &data_addr)) == KERN_SUCCESS) { |
1184 | kern_return_t mc_error = kcdata_memcpy(&reason->osr_kcd_descriptor, (mach_vm_address_t)data_addr, |
1185 | fatal_failure_desc, fatal_failure_desc_len); |
1186 | |
1187 | if (mc_error != KERN_SUCCESS) { |
1188 | printf("mac_vnode_check_signature: %s: failed to copy reason string " |
1189 | "(kcdata_memcpy error: %d, length: %ld)\n" , |
1190 | path, mc_error, fatal_failure_desc_len); |
1191 | } |
1192 | } else { |
1193 | printf("mac_vnode_check_signature: %s: failed to allocate space for reason string " |
1194 | "(os_reason_alloc_buffer error: %d, kcdata error: %d, length: %ld)\n" , |
1195 | path, reason_error, kcdata_error, fatal_failure_desc_len); |
1196 | } |
1197 | |
1198 | } |
1199 | } |
1200 | |
1201 | out: |
1202 | if (vn_path) { |
1203 | kfree(vn_path, MAXPATHLEN); |
1204 | } |
1205 | |
1206 | if (fatal_failure_desc_len > 0 && fatal_failure_desc != NULL) { |
1207 | kfree(fatal_failure_desc, fatal_failure_desc_len); |
1208 | } |
1209 | |
1210 | return (error); |
1211 | } |
1212 | |
1213 | #if 0 |
1214 | int |
1215 | mac_vnode_check_getacl(vfs_context_t ctx, struct vnode *vp, acl_type_t type) |
1216 | { |
1217 | kauth_cred_t cred; |
1218 | int error; |
1219 | |
1220 | #if SECURITY_MAC_CHECK_ENFORCE |
1221 | /* 21167099 - only check if we allow write */ |
1222 | if (!mac_vnode_enforce) |
1223 | return 0; |
1224 | #endif |
1225 | cred = vfs_context_ucred(ctx); |
1226 | if (!mac_cred_check_enforce(cred)) |
1227 | return (0); |
1228 | MAC_CHECK(vnode_check_getacl, cred, vp, vp->v_label, type); |
1229 | return (error); |
1230 | } |
1231 | #endif |
1232 | |
1233 | int |
1234 | mac_vnode_check_getextattr(vfs_context_t ctx, struct vnode *vp, |
1235 | const char *name, struct uio *uio) |
1236 | { |
1237 | kauth_cred_t cred; |
1238 | int error; |
1239 | |
1240 | #if SECURITY_MAC_CHECK_ENFORCE |
1241 | /* 21167099 - only check if we allow write */ |
1242 | if (!mac_vnode_enforce) |
1243 | return 0; |
1244 | #endif |
1245 | cred = vfs_context_ucred(ctx); |
1246 | if (!mac_cred_check_enforce(cred)) |
1247 | return (0); |
1248 | MAC_CHECK(vnode_check_getextattr, cred, vp, vp->v_label, |
1249 | name, uio); |
1250 | return (error); |
1251 | } |
1252 | |
1253 | int |
1254 | mac_vnode_check_ioctl(vfs_context_t ctx, struct vnode *vp, u_int cmd) |
1255 | { |
1256 | kauth_cred_t cred; |
1257 | int error; |
1258 | |
1259 | #if SECURITY_MAC_CHECK_ENFORCE |
1260 | /* 21167099 - only check if we allow write */ |
1261 | if (!mac_vnode_enforce) |
1262 | return 0; |
1263 | #endif |
1264 | cred = vfs_context_ucred(ctx); |
1265 | if (!mac_cred_check_enforce(cred)) |
1266 | return (0); |
1267 | MAC_CHECK(vnode_check_ioctl, cred, vp, vp->v_label, cmd); |
1268 | return (error); |
1269 | } |
1270 | |
1271 | int |
1272 | mac_vnode_check_kqfilter(vfs_context_t ctx, kauth_cred_t file_cred, |
1273 | struct knote *kn, struct vnode *vp) |
1274 | { |
1275 | kauth_cred_t cred; |
1276 | int error; |
1277 | |
1278 | #if SECURITY_MAC_CHECK_ENFORCE |
1279 | /* 21167099 - only check if we allow write */ |
1280 | if (!mac_vnode_enforce) |
1281 | return 0; |
1282 | #endif |
1283 | cred = vfs_context_ucred(ctx); |
1284 | if (!mac_cred_check_enforce(cred)) |
1285 | return (0); |
1286 | MAC_CHECK(vnode_check_kqfilter, cred, file_cred, kn, vp, |
1287 | vp->v_label); |
1288 | |
1289 | return (error); |
1290 | } |
1291 | |
1292 | int |
1293 | mac_vnode_check_link(vfs_context_t ctx, struct vnode *dvp, |
1294 | struct vnode *vp, struct componentname *cnp) |
1295 | { |
1296 | kauth_cred_t cred; |
1297 | int error; |
1298 | |
1299 | #if SECURITY_MAC_CHECK_ENFORCE |
1300 | /* 21167099 - only check if we allow write */ |
1301 | if (!mac_vnode_enforce) |
1302 | return 0; |
1303 | #endif |
1304 | cred = vfs_context_ucred(ctx); |
1305 | if (!mac_cred_check_enforce(cred)) |
1306 | return (0); |
1307 | MAC_CHECK(vnode_check_link, cred, dvp, dvp->v_label, vp, |
1308 | vp->v_label, cnp); |
1309 | return (error); |
1310 | } |
1311 | |
1312 | int |
1313 | mac_vnode_check_listextattr(vfs_context_t ctx, struct vnode *vp) |
1314 | { |
1315 | kauth_cred_t cred; |
1316 | int error; |
1317 | |
1318 | #if SECURITY_MAC_CHECK_ENFORCE |
1319 | /* 21167099 - only check if we allow write */ |
1320 | if (!mac_vnode_enforce) |
1321 | return 0; |
1322 | #endif |
1323 | cred = vfs_context_ucred(ctx); |
1324 | if (!mac_cred_check_enforce(cred)) |
1325 | return (0); |
1326 | MAC_CHECK(vnode_check_listextattr, cred, vp, vp->v_label); |
1327 | return (error); |
1328 | } |
1329 | |
1330 | int |
1331 | mac_vnode_check_lookup_preflight(vfs_context_t ctx, struct vnode *dvp, |
1332 | const char *path, size_t pathlen) |
1333 | { |
1334 | kauth_cred_t cred; |
1335 | int error; |
1336 | |
1337 | #if SECURITY_MAC_CHECK_ENFORCE |
1338 | /* 21167099 - only check if we allow write */ |
1339 | if (!mac_vnode_enforce) |
1340 | return 0; |
1341 | #endif |
1342 | cred = vfs_context_ucred(ctx); |
1343 | if (!mac_cred_check_enforce(cred)) |
1344 | return (0); |
1345 | MAC_CHECK(vnode_check_lookup_preflight, cred, dvp, dvp->v_label, path, pathlen); |
1346 | return (error); |
1347 | } |
1348 | |
1349 | int |
1350 | mac_vnode_check_lookup(vfs_context_t ctx, struct vnode *dvp, |
1351 | struct componentname *cnp) |
1352 | { |
1353 | kauth_cred_t cred; |
1354 | int error; |
1355 | |
1356 | #if SECURITY_MAC_CHECK_ENFORCE |
1357 | /* 21167099 - only check if we allow write */ |
1358 | if (!mac_vnode_enforce) |
1359 | return 0; |
1360 | #endif |
1361 | cred = vfs_context_ucred(ctx); |
1362 | if (!mac_cred_check_enforce(cred)) |
1363 | return (0); |
1364 | MAC_CHECK(vnode_check_lookup, cred, dvp, dvp->v_label, cnp); |
1365 | return (error); |
1366 | } |
1367 | |
1368 | int |
1369 | mac_vnode_check_open(vfs_context_t ctx, struct vnode *vp, int acc_mode) |
1370 | { |
1371 | kauth_cred_t cred; |
1372 | int error; |
1373 | |
1374 | #if SECURITY_MAC_CHECK_ENFORCE |
1375 | /* 21167099 - only check if we allow write */ |
1376 | if (!mac_vnode_enforce) |
1377 | return 0; |
1378 | #endif |
1379 | cred = vfs_context_ucred(ctx); |
1380 | if (!mac_cred_check_enforce(cred)) |
1381 | return (0); |
1382 | MAC_CHECK(vnode_check_open, cred, vp, vp->v_label, acc_mode); |
1383 | return (error); |
1384 | } |
1385 | |
1386 | int |
1387 | mac_vnode_check_read(vfs_context_t ctx, struct ucred *file_cred, |
1388 | struct vnode *vp) |
1389 | { |
1390 | kauth_cred_t cred; |
1391 | int error; |
1392 | |
1393 | #if SECURITY_MAC_CHECK_ENFORCE |
1394 | /* 21167099 - only check if we allow write */ |
1395 | if (!mac_vnode_enforce) |
1396 | return 0; |
1397 | #endif |
1398 | cred = vfs_context_ucred(ctx); |
1399 | if (!mac_cred_check_enforce(cred)) |
1400 | return (0); |
1401 | MAC_CHECK(vnode_check_read, cred, file_cred, vp, |
1402 | vp->v_label); |
1403 | |
1404 | return (error); |
1405 | } |
1406 | |
1407 | int |
1408 | mac_vnode_check_readdir(vfs_context_t ctx, struct vnode *dvp) |
1409 | { |
1410 | kauth_cred_t cred; |
1411 | int error; |
1412 | |
1413 | #if SECURITY_MAC_CHECK_ENFORCE |
1414 | /* 21167099 - only check if we allow write */ |
1415 | if (!mac_vnode_enforce) |
1416 | return 0; |
1417 | #endif |
1418 | cred = vfs_context_ucred(ctx); |
1419 | if (!mac_cred_check_enforce(cred)) |
1420 | return (0); |
1421 | MAC_CHECK(vnode_check_readdir, cred, dvp, dvp->v_label); |
1422 | return (error); |
1423 | } |
1424 | |
1425 | int |
1426 | mac_vnode_check_readlink(vfs_context_t ctx, struct vnode *vp) |
1427 | { |
1428 | kauth_cred_t cred; |
1429 | int error; |
1430 | |
1431 | #if SECURITY_MAC_CHECK_ENFORCE |
1432 | /* 21167099 - only check if we allow write */ |
1433 | if (!mac_vnode_enforce) |
1434 | return 0; |
1435 | #endif |
1436 | cred = vfs_context_ucred(ctx); |
1437 | if (!mac_cred_check_enforce(cred)) |
1438 | return (0); |
1439 | MAC_CHECK(vnode_check_readlink, cred, vp, vp->v_label); |
1440 | return (error); |
1441 | } |
1442 | |
1443 | int |
1444 | mac_vnode_check_label_update(vfs_context_t ctx, struct vnode *vp, |
1445 | struct label *newlabel) |
1446 | { |
1447 | kauth_cred_t cred; |
1448 | int error; |
1449 | |
1450 | #if SECURITY_MAC_CHECK_ENFORCE |
1451 | /* 21167099 - only check if we allow write */ |
1452 | if (!mac_vnode_enforce) |
1453 | return 0; |
1454 | #endif |
1455 | cred = vfs_context_ucred(ctx); |
1456 | if (!mac_cred_check_enforce(cred)) |
1457 | return (0); |
1458 | MAC_CHECK(vnode_check_label_update, cred, vp, vp->v_label, newlabel); |
1459 | |
1460 | return (error); |
1461 | } |
1462 | |
1463 | int |
1464 | mac_vnode_check_rename(vfs_context_t ctx, struct vnode *dvp, |
1465 | struct vnode *vp, struct componentname *cnp, struct vnode *tdvp, |
1466 | struct vnode *tvp, struct componentname *tcnp) |
1467 | { |
1468 | kauth_cred_t cred; |
1469 | int error; |
1470 | |
1471 | #if SECURITY_MAC_CHECK_ENFORCE |
1472 | /* 21167099 - only check if we allow write */ |
1473 | if (!mac_vnode_enforce) |
1474 | return 0; |
1475 | #endif |
1476 | cred = vfs_context_ucred(ctx); |
1477 | if (!mac_cred_check_enforce(cred)) |
1478 | return (0); |
1479 | |
1480 | MAC_CHECK(vnode_check_rename_from, cred, dvp, dvp->v_label, vp, |
1481 | vp->v_label, cnp); |
1482 | if (error) |
1483 | return (error); |
1484 | |
1485 | MAC_CHECK(vnode_check_rename_to, cred, tdvp, tdvp->v_label, tvp, |
1486 | tvp != NULL ? tvp->v_label : NULL, dvp == tdvp, tcnp); |
1487 | if (error) |
1488 | return (error); |
1489 | |
1490 | MAC_CHECK(vnode_check_rename, cred, dvp, dvp->v_label, vp, |
1491 | vp->v_label, cnp, tdvp, tdvp->v_label, tvp, |
1492 | tvp != NULL ? tvp->v_label : NULL, tcnp); |
1493 | return (error); |
1494 | } |
1495 | |
1496 | int |
1497 | mac_vnode_check_revoke(vfs_context_t ctx, struct vnode *vp) |
1498 | { |
1499 | kauth_cred_t cred; |
1500 | int error; |
1501 | |
1502 | #if SECURITY_MAC_CHECK_ENFORCE |
1503 | /* 21167099 - only check if we allow write */ |
1504 | if (!mac_vnode_enforce) |
1505 | return 0; |
1506 | #endif |
1507 | cred = vfs_context_ucred(ctx); |
1508 | if (!mac_cred_check_enforce(cred)) |
1509 | return (0); |
1510 | MAC_CHECK(vnode_check_revoke, cred, vp, vp->v_label); |
1511 | return (error); |
1512 | } |
1513 | |
1514 | int |
1515 | mac_vnode_check_searchfs(vfs_context_t ctx, struct vnode *vp, struct attrlist *alist) |
1516 | { |
1517 | kauth_cred_t cred; |
1518 | int error; |
1519 | |
1520 | #if SECURITY_MAC_CHECK_ENFORCE |
1521 | /* 21167099 - only check if we allow write */ |
1522 | if (!mac_vnode_enforce) |
1523 | return 0; |
1524 | #endif |
1525 | cred = vfs_context_ucred(ctx); |
1526 | if (!mac_cred_check_enforce(cred)) |
1527 | return (0); |
1528 | MAC_CHECK(vnode_check_searchfs, cred, vp, vp->v_label, alist); |
1529 | return (error); |
1530 | } |
1531 | |
1532 | int |
1533 | mac_vnode_check_select(vfs_context_t ctx, struct vnode *vp, int which) |
1534 | { |
1535 | kauth_cred_t cred; |
1536 | int error; |
1537 | |
1538 | #if SECURITY_MAC_CHECK_ENFORCE |
1539 | /* 21167099 - only check if we allow write */ |
1540 | if (!mac_vnode_enforce) |
1541 | return 0; |
1542 | #endif |
1543 | cred = vfs_context_ucred(ctx); |
1544 | if (!mac_cred_check_enforce(cred)) |
1545 | return (0); |
1546 | MAC_CHECK(vnode_check_select, cred, vp, vp->v_label, which); |
1547 | return (error); |
1548 | } |
1549 | |
1550 | int |
1551 | mac_vnode_check_setacl(vfs_context_t ctx, struct vnode *vp, |
1552 | struct kauth_acl *acl) |
1553 | { |
1554 | kauth_cred_t cred; |
1555 | int error; |
1556 | |
1557 | #if SECURITY_MAC_CHECK_ENFORCE |
1558 | /* 21167099 - only check if we allow write */ |
1559 | if (!mac_vnode_enforce) |
1560 | return 0; |
1561 | #endif |
1562 | cred = vfs_context_ucred(ctx); |
1563 | if (!mac_cred_check_enforce(cred)) |
1564 | return (0); |
1565 | MAC_CHECK(vnode_check_setacl, cred, vp, vp->v_label, acl); |
1566 | return (error); |
1567 | } |
1568 | |
1569 | int |
1570 | mac_vnode_check_setattrlist(vfs_context_t ctx, struct vnode *vp, |
1571 | struct attrlist *alist) |
1572 | { |
1573 | kauth_cred_t cred; |
1574 | int error; |
1575 | |
1576 | #if SECURITY_MAC_CHECK_ENFORCE |
1577 | /* 21167099 - only check if we allow write */ |
1578 | if (!mac_vnode_enforce) |
1579 | return 0; |
1580 | #endif |
1581 | cred = vfs_context_ucred(ctx); |
1582 | if (!mac_cred_check_enforce(cred)) |
1583 | return (0); |
1584 | MAC_CHECK(vnode_check_setattrlist, cred, vp, vp->v_label, alist); |
1585 | return (error); |
1586 | } |
1587 | |
1588 | int |
1589 | mac_vnode_check_setextattr(vfs_context_t ctx, struct vnode *vp, |
1590 | const char *name, struct uio *uio) |
1591 | { |
1592 | kauth_cred_t cred; |
1593 | int error; |
1594 | |
1595 | #if SECURITY_MAC_CHECK_ENFORCE |
1596 | /* 21167099 - only check if we allow write */ |
1597 | if (!mac_vnode_enforce) |
1598 | return 0; |
1599 | #endif |
1600 | cred = vfs_context_ucred(ctx); |
1601 | if (!mac_cred_check_enforce(cred)) |
1602 | return (0); |
1603 | MAC_CHECK(vnode_check_setextattr, cred, vp, vp->v_label, |
1604 | name, uio); |
1605 | return (error); |
1606 | } |
1607 | |
1608 | int |
1609 | mac_vnode_check_setflags(vfs_context_t ctx, struct vnode *vp, u_long flags) |
1610 | { |
1611 | kauth_cred_t cred; |
1612 | int error; |
1613 | |
1614 | #if SECURITY_MAC_CHECK_ENFORCE |
1615 | /* 21167099 - only check if we allow write */ |
1616 | if (!mac_vnode_enforce) |
1617 | return 0; |
1618 | #endif |
1619 | cred = vfs_context_ucred(ctx); |
1620 | if (!mac_cred_check_enforce(cred)) |
1621 | return (0); |
1622 | MAC_CHECK(vnode_check_setflags, cred, vp, vp->v_label, flags); |
1623 | return (error); |
1624 | } |
1625 | |
1626 | int |
1627 | mac_vnode_check_setmode(vfs_context_t ctx, struct vnode *vp, mode_t mode) |
1628 | { |
1629 | kauth_cred_t cred; |
1630 | int error; |
1631 | |
1632 | #if SECURITY_MAC_CHECK_ENFORCE |
1633 | /* 21167099 - only check if we allow write */ |
1634 | if (!mac_vnode_enforce) |
1635 | return 0; |
1636 | #endif |
1637 | cred = vfs_context_ucred(ctx); |
1638 | if (!mac_cred_check_enforce(cred)) |
1639 | return (0); |
1640 | MAC_CHECK(vnode_check_setmode, cred, vp, vp->v_label, mode); |
1641 | return (error); |
1642 | } |
1643 | |
1644 | int |
1645 | mac_vnode_check_setowner(vfs_context_t ctx, struct vnode *vp, uid_t uid, |
1646 | gid_t gid) |
1647 | { |
1648 | kauth_cred_t cred; |
1649 | int error; |
1650 | |
1651 | #if SECURITY_MAC_CHECK_ENFORCE |
1652 | /* 21167099 - only check if we allow write */ |
1653 | if (!mac_vnode_enforce) |
1654 | return 0; |
1655 | #endif |
1656 | cred = vfs_context_ucred(ctx); |
1657 | if (!mac_cred_check_enforce(cred)) |
1658 | return (0); |
1659 | MAC_CHECK(vnode_check_setowner, cred, vp, vp->v_label, uid, gid); |
1660 | return (error); |
1661 | } |
1662 | |
1663 | int |
1664 | mac_vnode_check_setutimes(vfs_context_t ctx, struct vnode *vp, |
1665 | struct timespec atime, struct timespec mtime) |
1666 | { |
1667 | kauth_cred_t cred; |
1668 | int error; |
1669 | |
1670 | #if SECURITY_MAC_CHECK_ENFORCE |
1671 | /* 21167099 - only check if we allow write */ |
1672 | if (!mac_vnode_enforce) |
1673 | return 0; |
1674 | #endif |
1675 | cred = vfs_context_ucred(ctx); |
1676 | if (!mac_cred_check_enforce(cred)) |
1677 | return (0); |
1678 | MAC_CHECK(vnode_check_setutimes, cred, vp, vp->v_label, atime, |
1679 | mtime); |
1680 | return (error); |
1681 | } |
1682 | |
1683 | int |
1684 | mac_vnode_check_stat(vfs_context_t ctx, struct ucred *file_cred, |
1685 | struct vnode *vp) |
1686 | { |
1687 | kauth_cred_t cred; |
1688 | int error; |
1689 | |
1690 | #if SECURITY_MAC_CHECK_ENFORCE |
1691 | /* 21167099 - only check if we allow write */ |
1692 | if (!mac_vnode_enforce) |
1693 | return 0; |
1694 | #endif |
1695 | cred = vfs_context_ucred(ctx); |
1696 | if (!mac_cred_check_enforce(cred)) |
1697 | return (0); |
1698 | MAC_CHECK(vnode_check_stat, cred, file_cred, vp, |
1699 | vp->v_label); |
1700 | return (error); |
1701 | } |
1702 | |
1703 | int |
1704 | mac_vnode_check_trigger_resolve(vfs_context_t ctx, struct vnode *dvp, |
1705 | struct componentname *cnp) |
1706 | { |
1707 | kauth_cred_t cred; |
1708 | int error; |
1709 | |
1710 | #if SECURITY_MAC_CHECK_ENFORCE |
1711 | /* 21167099 - only check if we allow write */ |
1712 | if (!mac_vnode_enforce) |
1713 | return 0; |
1714 | #endif |
1715 | cred = vfs_context_ucred(ctx); |
1716 | if (!mac_cred_check_enforce(cred)) |
1717 | return (0); |
1718 | MAC_CHECK(vnode_check_trigger_resolve, cred, dvp, dvp->v_label, cnp); |
1719 | return (error); |
1720 | } |
1721 | |
1722 | int |
1723 | mac_vnode_check_truncate(vfs_context_t ctx, struct ucred *file_cred, |
1724 | struct vnode *vp) |
1725 | { |
1726 | kauth_cred_t cred; |
1727 | int error; |
1728 | |
1729 | #if SECURITY_MAC_CHECK_ENFORCE |
1730 | /* 21167099 - only check if we allow write */ |
1731 | if (!mac_vnode_enforce) |
1732 | return 0; |
1733 | #endif |
1734 | cred = vfs_context_ucred(ctx); |
1735 | if (!mac_cred_check_enforce(cred)) |
1736 | return (0); |
1737 | MAC_CHECK(vnode_check_truncate, cred, file_cred, vp, |
1738 | vp->v_label); |
1739 | |
1740 | return (error); |
1741 | } |
1742 | |
1743 | int |
1744 | mac_vnode_check_write(vfs_context_t ctx, struct ucred *file_cred, |
1745 | struct vnode *vp) |
1746 | { |
1747 | kauth_cred_t cred; |
1748 | int error; |
1749 | |
1750 | #if SECURITY_MAC_CHECK_ENFORCE |
1751 | /* 21167099 - only check if we allow write */ |
1752 | if (!mac_vnode_enforce) |
1753 | return 0; |
1754 | #endif |
1755 | cred = vfs_context_ucred(ctx); |
1756 | if (!mac_cred_check_enforce(cred)) |
1757 | return (0); |
1758 | MAC_CHECK(vnode_check_write, cred, file_cred, vp, vp->v_label); |
1759 | |
1760 | return (error); |
1761 | } |
1762 | |
1763 | int |
1764 | mac_vnode_check_uipc_bind(vfs_context_t ctx, struct vnode *dvp, |
1765 | struct componentname *cnp, struct vnode_attr *vap) |
1766 | { |
1767 | kauth_cred_t cred; |
1768 | int error; |
1769 | |
1770 | #if SECURITY_MAC_CHECK_ENFORCE |
1771 | /* 21167099 - only check if we allow write */ |
1772 | if (!mac_vnode_enforce) |
1773 | return 0; |
1774 | #endif |
1775 | cred = vfs_context_ucred(ctx); |
1776 | if (!mac_cred_check_enforce(cred)) |
1777 | return (0); |
1778 | MAC_CHECK(vnode_check_uipc_bind, cred, dvp, dvp->v_label, cnp, vap); |
1779 | return (error); |
1780 | } |
1781 | |
1782 | int |
1783 | mac_vnode_check_uipc_connect(vfs_context_t ctx, struct vnode *vp, struct socket *so) |
1784 | { |
1785 | kauth_cred_t cred; |
1786 | int error; |
1787 | |
1788 | #if SECURITY_MAC_CHECK_ENFORCE |
1789 | /* 21167099 - only check if we allow write */ |
1790 | if (!mac_vnode_enforce) |
1791 | return 0; |
1792 | #endif |
1793 | cred = vfs_context_ucred(ctx); |
1794 | if (!mac_cred_check_enforce(cred)) |
1795 | return (0); |
1796 | MAC_CHECK(vnode_check_uipc_connect, cred, vp, vp->v_label, (socket_t) so); |
1797 | return (error); |
1798 | } |
1799 | |
1800 | void |
1801 | mac_vnode_label_update(vfs_context_t ctx, struct vnode *vp, struct label *newlabel) |
1802 | { |
1803 | kauth_cred_t cred = vfs_context_ucred(ctx); |
1804 | struct label *tmpl = NULL; |
1805 | |
1806 | if (vp->v_label == NULL) |
1807 | tmpl = mac_vnode_label_alloc(); |
1808 | |
1809 | vnode_lock(vp); |
1810 | |
1811 | /* recheck after lock */ |
1812 | if (vp->v_label == NULL) { |
1813 | vp->v_label = tmpl; |
1814 | tmpl = NULL; |
1815 | } |
1816 | |
1817 | MAC_PERFORM(vnode_label_update, cred, vp, vp->v_label, newlabel); |
1818 | vnode_unlock(vp); |
1819 | |
1820 | if (tmpl != NULL) |
1821 | mac_vnode_label_free(tmpl); |
1822 | } |
1823 | |
1824 | int |
1825 | mac_vnode_find_sigs(struct proc *p, struct vnode *vp, off_t offset) |
1826 | { |
1827 | int error; |
1828 | |
1829 | #if SECURITY_MAC_CHECK_ENFORCE |
1830 | /* 21167099 - only check if we allow write */ |
1831 | if (!mac_proc_enforce || !mac_vnode_enforce) |
1832 | return 0; |
1833 | #endif |
1834 | |
1835 | MAC_CHECK(vnode_find_sigs, p, vp, offset, vp->v_label); |
1836 | |
1837 | return (error); |
1838 | } |
1839 | |
1840 | void |
1841 | mac_mount_label_associate(vfs_context_t ctx, struct mount *mp) |
1842 | { |
1843 | kauth_cred_t cred = vfs_context_ucred(ctx); |
1844 | |
1845 | /* XXX: eventually this logic may be handled by the policy? */ |
1846 | |
1847 | /* We desire MULTILABEL for the root filesystem. */ |
1848 | if ((mp->mnt_flag & MNT_ROOTFS) && |
1849 | (strcmp(mp->mnt_vfsstat.f_fstypename, "hfs" ) == 0)) |
1850 | mp->mnt_flag |= MNT_MULTILABEL; |
1851 | |
1852 | /* MULTILABEL on DEVFS. */ |
1853 | if (strcmp(mp->mnt_vfsstat.f_fstypename, "devfs" ) == 0) |
1854 | mp->mnt_flag |= MNT_MULTILABEL; |
1855 | |
1856 | /* MULTILABEL on FDESC pseudo-filesystem. */ |
1857 | if (strcmp(mp->mnt_vfsstat.f_fstypename, "fdesc" ) == 0) |
1858 | mp->mnt_flag |= MNT_MULTILABEL; |
1859 | |
1860 | /* MULTILABEL on all NFS filesystems. */ |
1861 | if (strcmp(mp->mnt_vfsstat.f_fstypename, "nfs" ) == 0) |
1862 | mp->mnt_flag |= MNT_MULTILABEL; |
1863 | |
1864 | /* MULTILABEL on all AFP filesystems. */ |
1865 | if (strcmp(mp->mnt_vfsstat.f_fstypename, "afpfs" ) == 0) |
1866 | mp->mnt_flag |= MNT_MULTILABEL; |
1867 | |
1868 | if (mp->mnt_vtable != NULL) { |
1869 | /* Any filesystem that supports native XATTRs. */ |
1870 | if ((mp->mnt_vtable->vfc_vfsflags & VFC_VFSNATIVEXATTR)) |
1871 | mp->mnt_flag |= MNT_MULTILABEL; |
1872 | |
1873 | /* Filesystem does not support multilabel. */ |
1874 | if ((mp->mnt_vtable->vfc_vfsflags & VFC_VFSNOMACLABEL) && |
1875 | (mp->mnt_flag & MNT_MULTILABEL)) |
1876 | mp->mnt_flag &= ~MNT_MULTILABEL; |
1877 | } |
1878 | |
1879 | MAC_PERFORM(mount_label_associate, cred, mp, mp->mnt_mntlabel); |
1880 | #if DEBUG |
1881 | printf("MAC Framework enabling %s support: %s -> %s (%s)\n" , |
1882 | mp->mnt_flag & MNT_MULTILABEL ? "multilabel" : "singlelabel" , |
1883 | mp->mnt_vfsstat.f_mntfromname, |
1884 | mp->mnt_vfsstat.f_mntonname, |
1885 | mp->mnt_vfsstat.f_fstypename); |
1886 | #endif |
1887 | } |
1888 | |
1889 | int |
1890 | mac_mount_check_mount(vfs_context_t ctx, struct vnode *vp, |
1891 | struct componentname *cnp, const char *vfc_name) |
1892 | { |
1893 | kauth_cred_t cred; |
1894 | int error; |
1895 | |
1896 | #if SECURITY_MAC_CHECK_ENFORCE |
1897 | /* 21167099 - only check if we allow write */ |
1898 | if (!mac_vnode_enforce) |
1899 | return 0; |
1900 | #endif |
1901 | cred = vfs_context_ucred(ctx); |
1902 | if (!mac_cred_check_enforce(cred)) |
1903 | return (0); |
1904 | MAC_CHECK(mount_check_mount, cred, vp, vp->v_label, cnp, vfc_name); |
1905 | |
1906 | return (error); |
1907 | } |
1908 | |
1909 | int |
1910 | mac_mount_check_snapshot_create(vfs_context_t ctx, struct mount *mp, |
1911 | const char *name) |
1912 | { |
1913 | kauth_cred_t cred; |
1914 | int error; |
1915 | |
1916 | #if SECURITY_MAC_CHECK_ENFORCE |
1917 | /* 21167099 - only check if we allow write */ |
1918 | if (!mac_vnode_enforce) |
1919 | return 0; |
1920 | #endif |
1921 | cred = vfs_context_ucred(ctx); |
1922 | if (!mac_cred_check_enforce(cred)) |
1923 | return (0); |
1924 | MAC_CHECK(mount_check_snapshot_create, cred, mp, name); |
1925 | return (error); |
1926 | } |
1927 | |
1928 | int |
1929 | mac_mount_check_snapshot_delete(vfs_context_t ctx, struct mount *mp, |
1930 | const char *name) |
1931 | { |
1932 | kauth_cred_t cred; |
1933 | int error; |
1934 | |
1935 | #if SECURITY_MAC_CHECK_ENFORCE |
1936 | /* 21167099 - only check if we allow write */ |
1937 | if (!mac_vnode_enforce) |
1938 | return 0; |
1939 | #endif |
1940 | cred = vfs_context_ucred(ctx); |
1941 | if (!mac_cred_check_enforce(cred)) |
1942 | return (0); |
1943 | MAC_CHECK(mount_check_snapshot_delete, cred, mp, name); |
1944 | return (error); |
1945 | } |
1946 | |
1947 | int |
1948 | mac_mount_check_snapshot_revert(vfs_context_t ctx, struct mount *mp, |
1949 | const char *name) |
1950 | { |
1951 | kauth_cred_t cred; |
1952 | int error; |
1953 | |
1954 | #if SECURITY_MAC_CHECK_ENFORCE |
1955 | /* 21167099 - only check if we allow write */ |
1956 | if (!mac_vnode_enforce) |
1957 | return 0; |
1958 | #endif |
1959 | cred = vfs_context_ucred(ctx); |
1960 | if (!mac_cred_check_enforce(cred)) |
1961 | return (0); |
1962 | MAC_CHECK(mount_check_snapshot_revert, cred, mp, name); |
1963 | return (error); |
1964 | } |
1965 | |
1966 | int |
1967 | mac_mount_check_remount(vfs_context_t ctx, struct mount *mp) |
1968 | { |
1969 | kauth_cred_t cred; |
1970 | int error; |
1971 | |
1972 | #if SECURITY_MAC_CHECK_ENFORCE |
1973 | /* 21167099 - only check if we allow write */ |
1974 | if (!mac_vnode_enforce) |
1975 | return 0; |
1976 | #endif |
1977 | cred = vfs_context_ucred(ctx); |
1978 | if (!mac_cred_check_enforce(cred)) |
1979 | return (0); |
1980 | MAC_CHECK(mount_check_remount, cred, mp, mp->mnt_mntlabel); |
1981 | |
1982 | return (error); |
1983 | } |
1984 | |
1985 | int |
1986 | mac_mount_check_umount(vfs_context_t ctx, struct mount *mp) |
1987 | { |
1988 | kauth_cred_t cred; |
1989 | int error; |
1990 | |
1991 | #if SECURITY_MAC_CHECK_ENFORCE |
1992 | /* 21167099 - only check if we allow write */ |
1993 | if (!mac_vnode_enforce) |
1994 | return 0; |
1995 | #endif |
1996 | cred = vfs_context_ucred(ctx); |
1997 | if (!mac_cred_check_enforce(cred)) |
1998 | return (0); |
1999 | MAC_CHECK(mount_check_umount, cred, mp, mp->mnt_mntlabel); |
2000 | |
2001 | return (error); |
2002 | } |
2003 | |
2004 | int |
2005 | mac_mount_check_getattr(vfs_context_t ctx, struct mount *mp, |
2006 | struct vfs_attr *vfa) |
2007 | { |
2008 | kauth_cred_t cred; |
2009 | int error; |
2010 | |
2011 | #if SECURITY_MAC_CHECK_ENFORCE |
2012 | /* 21167099 - only check if we allow write */ |
2013 | if (!mac_vnode_enforce) |
2014 | return 0; |
2015 | #endif |
2016 | cred = vfs_context_ucred(ctx); |
2017 | if (!mac_cred_check_enforce(cred)) |
2018 | return (0); |
2019 | MAC_CHECK(mount_check_getattr, cred, mp, mp->mnt_mntlabel, vfa); |
2020 | return (error); |
2021 | } |
2022 | |
2023 | int |
2024 | mac_mount_check_setattr(vfs_context_t ctx, struct mount *mp, |
2025 | struct vfs_attr *vfa) |
2026 | { |
2027 | kauth_cred_t cred; |
2028 | int error; |
2029 | |
2030 | #if SECURITY_MAC_CHECK_ENFORCE |
2031 | /* 21167099 - only check if we allow write */ |
2032 | if (!mac_vnode_enforce) |
2033 | return 0; |
2034 | #endif |
2035 | cred = vfs_context_ucred(ctx); |
2036 | if (!mac_cred_check_enforce(cred)) |
2037 | return (0); |
2038 | MAC_CHECK(mount_check_setattr, cred, mp, mp->mnt_mntlabel, vfa); |
2039 | return (error); |
2040 | } |
2041 | |
2042 | int |
2043 | mac_mount_check_stat(vfs_context_t ctx, struct mount *mount) |
2044 | { |
2045 | kauth_cred_t cred; |
2046 | int error; |
2047 | |
2048 | #if SECURITY_MAC_CHECK_ENFORCE |
2049 | /* 21167099 - only check if we allow write */ |
2050 | if (!mac_vnode_enforce) |
2051 | return 0; |
2052 | #endif |
2053 | cred = vfs_context_ucred(ctx); |
2054 | if (!mac_cred_check_enforce(cred)) |
2055 | return (0); |
2056 | MAC_CHECK(mount_check_stat, cred, mount, mount->mnt_mntlabel); |
2057 | |
2058 | return (error); |
2059 | } |
2060 | |
2061 | int |
2062 | mac_mount_check_label_update(vfs_context_t ctx, struct mount *mount) |
2063 | { |
2064 | kauth_cred_t cred; |
2065 | int error; |
2066 | |
2067 | #if SECURITY_MAC_CHECK_ENFORCE |
2068 | /* 21167099 - only check if we allow write */ |
2069 | if (!mac_vnode_enforce) |
2070 | return 0; |
2071 | #endif |
2072 | cred = vfs_context_ucred(ctx); |
2073 | if (!mac_cred_check_enforce(cred)) |
2074 | return (0); |
2075 | MAC_CHECK(mount_check_label_update, cred, mount, mount->mnt_mntlabel); |
2076 | |
2077 | return (error); |
2078 | } |
2079 | |
2080 | int |
2081 | mac_mount_check_fsctl(vfs_context_t ctx, struct mount *mp, u_int cmd) |
2082 | { |
2083 | kauth_cred_t cred; |
2084 | int error; |
2085 | |
2086 | #if SECURITY_MAC_CHECK_ENFORCE |
2087 | /* 21167099 - only check if we allow write */ |
2088 | if (!mac_vnode_enforce) |
2089 | return 0; |
2090 | #endif |
2091 | cred = vfs_context_ucred(ctx); |
2092 | if (!mac_cred_check_enforce(cred)) |
2093 | return (0); |
2094 | MAC_CHECK(mount_check_fsctl, cred, mp, mp->mnt_mntlabel, cmd); |
2095 | |
2096 | return (error); |
2097 | } |
2098 | |
2099 | void |
2100 | mac_devfs_label_associate_device(dev_t dev, struct devnode *de, |
2101 | const char *fullpath) |
2102 | { |
2103 | #if SECURITY_MAC_CHECK_ENFORCE |
2104 | /* 21167099 - only check if we allow write */ |
2105 | if (!mac_device_enforce) |
2106 | return; |
2107 | #endif |
2108 | |
2109 | MAC_PERFORM(devfs_label_associate_device, dev, de, de->dn_label, |
2110 | fullpath); |
2111 | } |
2112 | |
2113 | void |
2114 | mac_devfs_label_associate_directory(const char *dirname, int dirnamelen, |
2115 | struct devnode *de, const char *fullpath) |
2116 | { |
2117 | #if SECURITY_MAC_CHECK_ENFORCE |
2118 | /* 21167099 - only check if we allow write */ |
2119 | if (!mac_device_enforce) |
2120 | return; |
2121 | #endif |
2122 | |
2123 | MAC_PERFORM(devfs_label_associate_directory, dirname, dirnamelen, de, |
2124 | de->dn_label, fullpath); |
2125 | } |
2126 | |
2127 | int |
2128 | vn_setlabel(struct vnode *vp, struct label *intlabel, vfs_context_t context) |
2129 | { |
2130 | int error; |
2131 | |
2132 | #if SECURITY_MAC_CHECK_ENFORCE |
2133 | /* 21167099 - only check if we allow write */ |
2134 | if (!mac_vnode_enforce) |
2135 | return 0; |
2136 | #endif |
2137 | if (!mac_label_vnodes) |
2138 | return (0); |
2139 | |
2140 | if (vp->v_mount == NULL) { |
2141 | printf("vn_setlabel: null v_mount\n" ); |
2142 | if (vp->v_type != VNON) |
2143 | printf("vn_setlabel: null v_mount with non-VNON\n" ); |
2144 | return (EBADF); |
2145 | } |
2146 | |
2147 | if ((vp->v_mount->mnt_flag & MNT_MULTILABEL) == 0) |
2148 | return (ENOTSUP); |
2149 | |
2150 | /* |
2151 | * Multi-phase commit. First check the policies to confirm the |
2152 | * change is OK. Then commit via the filesystem. Finally, |
2153 | * update the actual vnode label. Question: maybe the filesystem |
2154 | * should update the vnode at the end as part of VNOP_SETLABEL()? |
2155 | */ |
2156 | error = mac_vnode_check_label_update(context, vp, intlabel); |
2157 | if (error) |
2158 | return (error); |
2159 | |
2160 | error = VNOP_SETLABEL(vp, intlabel, context); |
2161 | if (error == ENOTSUP) { |
2162 | error = mac_vnode_label_store(context, vp, |
2163 | intlabel); |
2164 | if (error) { |
2165 | printf("%s: mac_vnode_label_store failed %d\n" , |
2166 | __func__, error); |
2167 | return (error); |
2168 | } |
2169 | mac_vnode_label_update(context, vp, intlabel); |
2170 | } else |
2171 | if (error) { |
2172 | printf("vn_setlabel: vop setlabel failed %d\n" , error); |
2173 | return (error); |
2174 | } |
2175 | |
2176 | return (0); |
2177 | } |
2178 | |
2179 | int |
2180 | mac_vnode_label_associate_fdesc(struct mount *mp, struct fdescnode *fnp, |
2181 | struct vnode *vp, vfs_context_t ctx) |
2182 | { |
2183 | struct fileproc *fp; |
2184 | #if CONFIG_MACF_SOCKET_SUBSET |
2185 | struct socket *so; |
2186 | #endif |
2187 | struct pipe *cpipe; |
2188 | struct vnode *fvp; |
2189 | struct proc *p; |
2190 | int error; |
2191 | |
2192 | error = 0; |
2193 | |
2194 | /* |
2195 | * If no backing file, let the policy choose which label to use. |
2196 | */ |
2197 | if (fnp->fd_fd == -1) { |
2198 | MAC_PERFORM(vnode_label_associate_file, vfs_context_ucred(ctx), |
2199 | mp, mp->mnt_mntlabel, NULL, NULL, vp, vp->v_label); |
2200 | return (0); |
2201 | } |
2202 | |
2203 | p = vfs_context_proc(ctx); |
2204 | error = fp_lookup(p, fnp->fd_fd, &fp, 0); |
2205 | if (error) |
2206 | return (error); |
2207 | |
2208 | if (fp->f_fglob == NULL) { |
2209 | error = EBADF; |
2210 | goto out; |
2211 | } |
2212 | |
2213 | switch (FILEGLOB_DTYPE(fp->f_fglob)) { |
2214 | case DTYPE_VNODE: |
2215 | fvp = (struct vnode *)fp->f_fglob->fg_data; |
2216 | if ((error = vnode_getwithref(fvp))) |
2217 | goto out; |
2218 | MAC_PERFORM(vnode_label_copy, fvp->v_label, vp->v_label); |
2219 | (void)vnode_put(fvp); |
2220 | break; |
2221 | #if CONFIG_MACF_SOCKET_SUBSET |
2222 | case DTYPE_SOCKET: |
2223 | so = (struct socket *)fp->f_fglob->fg_data; |
2224 | socket_lock(so, 1); |
2225 | MAC_PERFORM(vnode_label_associate_socket, |
2226 | vfs_context_ucred(ctx), (socket_t)so, so->so_label, |
2227 | vp, vp->v_label); |
2228 | socket_unlock(so, 1); |
2229 | break; |
2230 | #endif |
2231 | case DTYPE_PSXSHM: |
2232 | pshm_label_associate(fp, vp, ctx); |
2233 | break; |
2234 | case DTYPE_PSXSEM: |
2235 | psem_label_associate(fp, vp, ctx); |
2236 | break; |
2237 | case DTYPE_PIPE: |
2238 | cpipe = (struct pipe *)fp->f_fglob->fg_data; |
2239 | /* kern/sys_pipe.c:pipe_select() suggests this test. */ |
2240 | if (cpipe == (struct pipe *)-1) { |
2241 | error = EINVAL; |
2242 | goto out; |
2243 | } |
2244 | PIPE_LOCK(cpipe); |
2245 | MAC_PERFORM(vnode_label_associate_pipe, vfs_context_ucred(ctx), |
2246 | cpipe, cpipe->pipe_label, vp, vp->v_label); |
2247 | PIPE_UNLOCK(cpipe); |
2248 | break; |
2249 | case DTYPE_KQUEUE: |
2250 | case DTYPE_FSEVENTS: |
2251 | case DTYPE_ATALK: |
2252 | case DTYPE_NETPOLICY: |
2253 | default: |
2254 | MAC_PERFORM(vnode_label_associate_file, vfs_context_ucred(ctx), |
2255 | mp, mp->mnt_mntlabel, fp->f_fglob, fp->f_fglob->fg_label, |
2256 | vp, vp->v_label); |
2257 | break; |
2258 | } |
2259 | out: |
2260 | fp_drop(p, fnp->fd_fd, fp, 0); |
2261 | return (error); |
2262 | } |
2263 | |