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 | #include <libkern/OSAtomic.h> |
67 | |
68 | #include <sys/param.h> |
69 | #include <sys/systm.h> |
70 | #include <sys/kernel.h> |
71 | #include <sys/proc.h> |
72 | #include <sys/kauth.h> |
73 | |
74 | #include <sys/file_internal.h> |
75 | #include <sys/imgact.h> |
76 | #include <sys/namei.h> |
77 | #include <sys/mount_internal.h> |
78 | #include <sys/pipe.h> |
79 | #include <sys/posix_sem.h> |
80 | #include <sys/posix_shm.h> |
81 | #include <sys/reason.h> |
82 | #include <sys/uio_internal.h> |
83 | #include <sys/vnode_internal.h> |
84 | #include <sys/kdebug.h> |
85 | |
86 | |
87 | #include <miscfs/devfs/devfsdefs.h> |
88 | #include <miscfs/devfs/fdesc.h> |
89 | |
90 | #include <security/mac_internal.h> |
91 | |
92 | /* convert {R,W,X}_OK values to V{READ,WRITE,EXEC} */ |
93 | #define ACCESS_MODE_TO_VNODE_MASK(m) (m << 6) |
94 | |
95 | |
96 | /* |
97 | * Optional tracing of policy operations. Define VFS_TRACE_POLICY_OPS to trace the operations. |
98 | * |
99 | * Along with DBG_FSYSTEM and DBG_VFS, dcode in the macros below is used to construct |
100 | * KDBG_EVENTID(DBG_FSYSTEM, DBG_VFS, dcode) global event id, see bsd/sys/kdebug.h. |
101 | * Note that dcode is multiplied by 4 and ORed as part of the construction. See bsd/kern/trace_codes |
102 | * for list of system-wide {global event id, name} pairs. Currently DBG_VFS event ids are in range |
103 | * [0x3130000, 0x3130188]. |
104 | */ |
105 | |
106 | //#define VFS_TRACE_POLICY_OPS |
107 | |
108 | #ifdef VFS_TRACE_POLICY_OPS |
109 | #define DBG_VFS_CODE(dcode) FSDBG_CODE(DBG_VFS, dcode) |
110 | #define VFS_KERNEL_DEBUG_START0(dcode) KERNEL_DEBUG_CONSTANT(DBG_VFS_CODE(dcode) | DBG_FUNC_START, 0, 0, 0, 0, 0) |
111 | #define VFS_KERNEL_DEBUG_END0(dcode) KERNEL_DEBUG_CONSTANT(DBG_VFS_CODE(dcode) | DBG_FUNC_END, 0, 0, 0, 0, 0) |
112 | #define VFS_KERNEL_DEBUG_START1(dcode, darg) KERNEL_DEBUG_CONSTANT(DBG_VFS_CODE(dcode) | DBG_FUNC_START, darg, 0, 0, 0, 0) |
113 | #define VFS_KERNEL_DEBUG_END1(dcode, darg) KERNEL_DEBUG_CONSTANT(DBG_VFS_CODE(dcode) | DBG_FUNC_END, darg, 0, 0, 0, 0) |
114 | #else |
115 | #define VFS_KERNEL_DEBUG_START0(dcode) do {} while (0) |
116 | #define VFS_KERNEL_DEBUG_END0(dcode) do {} while (0) |
117 | #define VFS_KERNEL_DEBUG_START1(dcode, darg) do {} while (0) |
118 | #define VFS_KERNEL_DEBUG_END1(dcode, darg) do {} while (0) |
119 | #endif |
120 | |
121 | void |
122 | mac_devfs_label_init(struct devnode *de) |
123 | { |
124 | mac_labelzone_alloc_owned(labelp: &de->dn_label, MAC_WAITOK, extra_setup: ^(struct label *label) { |
125 | VFS_KERNEL_DEBUG_START0(0); |
126 | MAC_PERFORM(devfs_label_init, label); |
127 | VFS_KERNEL_DEBUG_END0(0); |
128 | }); |
129 | } |
130 | |
131 | struct label * |
132 | mac_devfs_label(struct devnode *de) |
133 | { |
134 | return mac_label_verify(labelp: &de->dn_label); |
135 | } |
136 | |
137 | void |
138 | mac_devfs_label_destroy(struct devnode *de) |
139 | { |
140 | mac_labelzone_free_owned(labelp: &de->dn_label, extra_deinit: ^(struct label *label) { |
141 | VFS_KERNEL_DEBUG_START1(3, label); |
142 | MAC_PERFORM(devfs_label_destroy, label); |
143 | VFS_KERNEL_DEBUG_END1(3, label); |
144 | }); |
145 | } |
146 | |
147 | void |
148 | mac_mount_label_init(struct mount *mp) |
149 | { |
150 | mac_labelzone_alloc_owned(labelp: &mp->mnt_mntlabel, MAC_WAITOK, extra_setup: ^(struct label *label) { |
151 | VFS_KERNEL_DEBUG_START0(1); |
152 | MAC_PERFORM(mount_label_init, label); |
153 | VFS_KERNEL_DEBUG_END0(1); |
154 | }); |
155 | } |
156 | |
157 | struct label * |
158 | mac_mount_label(struct mount *mp) |
159 | { |
160 | return mac_label_verify(labelp: &mp->mnt_mntlabel); |
161 | } |
162 | |
163 | void |
164 | mac_mount_label_destroy(struct mount *mp) |
165 | { |
166 | mac_labelzone_free_owned(labelp: &mp->mnt_mntlabel, extra_deinit: ^(struct label *label) { |
167 | VFS_KERNEL_DEBUG_START1(4, label); |
168 | MAC_PERFORM(mount_label_destroy, label); |
169 | VFS_KERNEL_DEBUG_END1(4, label); |
170 | }); |
171 | } |
172 | |
173 | struct label * |
174 | mac_vnode_label_alloc(vnode_t vp) |
175 | { |
176 | return mac_labelzone_alloc_for_owner(labelp: vp ? &vp->v_label : NULL, MAC_WAITOK, extra_setup: ^(struct label *label) { |
177 | VFS_KERNEL_DEBUG_START0(2); |
178 | MAC_PERFORM(vnode_label_init, label); |
179 | VFS_KERNEL_DEBUG_END0(2); |
180 | OSIncrementAtomic(&mac_vnode_label_count); |
181 | }); |
182 | } |
183 | |
184 | void |
185 | mac_vnode_label_init(vnode_t vp) |
186 | { |
187 | struct label *label; |
188 | |
189 | label = mac_vnode_label_alloc(vp); |
190 | vp->v_label = label; |
191 | } |
192 | |
193 | struct label * |
194 | mac_vnode_label(vnode_t vp) |
195 | { |
196 | return mac_label_verify(labelp: &vp->v_label); |
197 | } |
198 | |
199 | static void |
200 | mac_vnode_label_cleanup(struct label *label) |
201 | { |
202 | VFS_KERNEL_DEBUG_START1(5, label); |
203 | MAC_PERFORM(vnode_label_destroy, label); |
204 | VFS_KERNEL_DEBUG_END1(5, label); |
205 | OSDecrementAtomic(&mac_vnode_label_count); |
206 | } |
207 | |
208 | void |
209 | mac_vnode_label_free(struct label *label) |
210 | { |
211 | if (label != NULL) { |
212 | mac_vnode_label_cleanup(label); |
213 | mac_labelzone_free(l: label); |
214 | } |
215 | } |
216 | |
217 | void |
218 | mac_vnode_label_destroy(struct vnode *vp) |
219 | { |
220 | mac_labelzone_free_owned(labelp: &vp->v_label, extra_deinit: ^(struct label *label) { |
221 | mac_vnode_label_cleanup(label); |
222 | }); |
223 | } |
224 | |
225 | int |
226 | mac_vnode_label_init_needed(vnode_t vp) |
227 | { |
228 | #if CONFIG_MACF_LAZY_VNODE_LABELS |
229 | (void)vp; |
230 | return false; |
231 | #else |
232 | return mac_label_vnodes != 0 && mac_vnode_label(vp) == NULL; |
233 | #endif |
234 | } |
235 | |
236 | struct label * |
237 | mac_vnode_label_allocate(vnode_t vp) |
238 | { |
239 | if (mac_vnode_label_init_needed(vp)) { |
240 | mac_vnode_label_init(vp); |
241 | } |
242 | return mac_vnode_label(vp); |
243 | } |
244 | |
245 | /* |
246 | * vnode labels are allocated at the same time as vnodes, but vnodes are never |
247 | * freed. Instead, we want to remove any sensitive information before putting |
248 | * them on the free list for reuse. |
249 | */ |
250 | void |
251 | mac_vnode_label_recycle(vnode_t vp) |
252 | { |
253 | struct label *v_label = mac_vnode_label(vp); |
254 | |
255 | MAC_PERFORM(vnode_label_recycle, v_label); |
256 | #if CONFIG_MACF_LAZY_VNODE_LABELS |
257 | if (v_label) { |
258 | mac_vnode_label_destroy(vp); |
259 | vp->v_lflag &= ~VL_LABELED; |
260 | } |
261 | #endif |
262 | } |
263 | |
264 | void |
265 | mac_vnode_label_copy(struct label *src, struct label *dest) |
266 | { |
267 | VFS_KERNEL_DEBUG_START1(6, src); |
268 | if (src == NULL) { |
269 | MAC_PERFORM(vnode_label_init, dest); |
270 | } else { |
271 | MAC_PERFORM(vnode_label_copy, src, dest); |
272 | } |
273 | VFS_KERNEL_DEBUG_END1(6, src); |
274 | } |
275 | |
276 | int |
277 | mac_vnode_label_externalize_audit(struct vnode *vp, struct mac *mac) |
278 | { |
279 | int error; |
280 | |
281 | /* It is assumed that any necessary vnode locking is done on entry */ |
282 | error = MAC_EXTERNALIZE_AUDIT(vnode, mac_vnode_label(vp), |
283 | mac->m_string, mac->m_buflen); |
284 | |
285 | return error; |
286 | } |
287 | |
288 | int |
289 | mac_vnode_label_externalize(struct label *label, char *elements, |
290 | char *outbuf, size_t outbuflen, int flags __unused) |
291 | { |
292 | int error; |
293 | |
294 | error = MAC_EXTERNALIZE(vnode, label, elements, outbuf, outbuflen); |
295 | |
296 | return error; |
297 | } |
298 | |
299 | int |
300 | mac_vnode_label_internalize(struct label *label, char *string) |
301 | { |
302 | int error; |
303 | |
304 | error = MAC_INTERNALIZE(vnode, label, string); |
305 | |
306 | return error; |
307 | } |
308 | |
309 | int |
310 | mac_mount_label_internalize(struct label *label, char *string) |
311 | { |
312 | int error; |
313 | |
314 | error = MAC_INTERNALIZE(mount, label, string); |
315 | |
316 | return error; |
317 | } |
318 | |
319 | int |
320 | mac_mount_label_externalize(struct label *label, char *elements, |
321 | char *outbuf, size_t outbuflen) |
322 | { |
323 | int error; |
324 | |
325 | error = MAC_EXTERNALIZE(mount, label, elements, outbuf, outbuflen); |
326 | |
327 | return error; |
328 | } |
329 | |
330 | void |
331 | mac_devfs_label_copy(struct label *src, struct label *dest) |
332 | { |
333 | #if SECURITY_MAC_CHECK_ENFORCE |
334 | /* 21167099 - only check if we allow write */ |
335 | if (!mac_device_enforce) { |
336 | return; |
337 | } |
338 | #endif |
339 | |
340 | VFS_KERNEL_DEBUG_START1(7, src); |
341 | MAC_PERFORM(devfs_label_copy, src, dest); |
342 | VFS_KERNEL_DEBUG_END1(7, src); |
343 | } |
344 | |
345 | void |
346 | mac_devfs_label_update(struct mount *mp, struct devnode *de, |
347 | struct vnode *vp) |
348 | { |
349 | #if SECURITY_MAC_CHECK_ENFORCE |
350 | /* 21167099 - only check if we allow write */ |
351 | if (!mac_device_enforce) { |
352 | return; |
353 | } |
354 | #endif |
355 | |
356 | VFS_KERNEL_DEBUG_START1(8, vp); |
357 | MAC_PERFORM(devfs_label_update, mp, de, mac_devfs_label(de), vp, |
358 | mac_vnode_label(vp)); |
359 | VFS_KERNEL_DEBUG_END1(8, vp); |
360 | } |
361 | |
362 | int |
363 | mac_vnode_label_associate(struct mount *mp, struct vnode *vp, vfs_context_t ctx) |
364 | { |
365 | struct devnode *dnp; |
366 | struct fdescnode *fnp; |
367 | int error = 0; |
368 | |
369 | #if SECURITY_MAC_CHECK_ENFORCE |
370 | /* 21167099 - only check if we allow write */ |
371 | if (!mac_vnode_enforce) { |
372 | return error; |
373 | } |
374 | #endif |
375 | |
376 | /* XXX: should not inspect v_tag in kernel! */ |
377 | switch (vp->v_tag) { |
378 | case VT_DEVFS: |
379 | dnp = VTODN(vp); |
380 | mac_vnode_label_associate_devfs(mp, de: dnp, vp); |
381 | break; |
382 | case VT_FDESC: |
383 | fnp = VTOFDESC(vp); |
384 | error = mac_vnode_label_associate_fdesc(mp, fnp, vp, ctx); |
385 | break; |
386 | default: |
387 | error = mac_vnode_label_associate_extattr(mp, vp); |
388 | break; |
389 | } |
390 | |
391 | return error; |
392 | } |
393 | |
394 | void |
395 | mac_vnode_label_associate_devfs(struct mount *mp, struct devnode *de, |
396 | struct vnode *vp) |
397 | { |
398 | #if SECURITY_MAC_CHECK_ENFORCE |
399 | /* 21167099 - only check if we allow write */ |
400 | if (!mac_device_enforce) { |
401 | return; |
402 | } |
403 | #endif |
404 | |
405 | VFS_KERNEL_DEBUG_START1(9, vp); |
406 | MAC_PERFORM(vnode_label_associate_devfs, |
407 | mp, mp ? mac_mount_label(mp) : NULL, |
408 | de, mac_devfs_label(de), |
409 | vp, mac_vnode_label(vp)); |
410 | VFS_KERNEL_DEBUG_END1(9, vp); |
411 | } |
412 | |
413 | int |
414 | mac_vnode_label_associate_extattr(struct mount *mp, struct vnode *vp) |
415 | { |
416 | int error; |
417 | |
418 | VFS_KERNEL_DEBUG_START1(10, vp); |
419 | MAC_CHECK(vnode_label_associate_extattr, mp, mac_mount_label(mp), vp, |
420 | mac_vnode_label(vp)); |
421 | VFS_KERNEL_DEBUG_END1(10, vp); |
422 | |
423 | return error; |
424 | } |
425 | |
426 | void |
427 | mac_vnode_label_associate_singlelabel(struct mount *mp, struct vnode *vp) |
428 | { |
429 | #if SECURITY_MAC_CHECK_ENFORCE |
430 | /* 21167099 - only check if we allow write */ |
431 | if (!mac_vnode_enforce) { |
432 | return; |
433 | } |
434 | #endif |
435 | if (!mac_label_vnodes) { |
436 | return; |
437 | } |
438 | |
439 | VFS_KERNEL_DEBUG_START1(11, vp); |
440 | MAC_PERFORM(vnode_label_associate_singlelabel, mp, |
441 | mp ? mac_mount_label(mp) : NULL, vp, mac_vnode_label(vp)); |
442 | VFS_KERNEL_DEBUG_END1(11, vp); |
443 | } |
444 | |
445 | int |
446 | mac_vnode_notify_create(vfs_context_t ctx, struct mount *mp, |
447 | struct vnode *dvp, struct vnode *vp, struct componentname *cnp) |
448 | { |
449 | kauth_cred_t cred; |
450 | int error; |
451 | |
452 | #if SECURITY_MAC_CHECK_ENFORCE |
453 | /* 21167099 - only check if we allow write */ |
454 | if (!mac_vnode_enforce) { |
455 | return 0; |
456 | } |
457 | #endif |
458 | cred = vfs_context_ucred(ctx); |
459 | if (!mac_cred_check_enforce(cred)) { |
460 | return 0; |
461 | } |
462 | VFS_KERNEL_DEBUG_START1(12, vp); |
463 | MAC_CHECK(vnode_notify_create, cred, mp, mac_mount_label(mp), |
464 | dvp, mac_vnode_label(dvp), vp, mac_vnode_label(vp), cnp); |
465 | VFS_KERNEL_DEBUG_END1(12, vp); |
466 | |
467 | return error; |
468 | } |
469 | |
470 | void |
471 | mac_vnode_notify_rename(vfs_context_t ctx, struct vnode *fvp, |
472 | struct vnode *fdvp, struct componentname *fcnp, struct vnode *tvp, |
473 | struct vnode *tdvp, struct componentname *tcnp, bool swap) |
474 | { |
475 | kauth_cred_t cred; |
476 | |
477 | #if SECURITY_MAC_CHECK_ENFORCE |
478 | /* 21167099 - only check if we allow write */ |
479 | if (!mac_vnode_enforce) { |
480 | return; |
481 | } |
482 | #endif |
483 | cred = vfs_context_ucred(ctx); |
484 | if (!mac_cred_check_enforce(cred)) { |
485 | return; |
486 | } |
487 | |
488 | VFS_KERNEL_DEBUG_START1(13, fvp); |
489 | MAC_POLICY_ITERATE({ |
490 | /* BEGIN IGNORE CODESTYLE */ |
491 | if (swap) { |
492 | if (mpc->mpc_ops->mpo_vnode_notify_swap != NULL) { |
493 | MAC_PERFORM_CALL(vnode_notify_swap, mpc); |
494 | mpc->mpc_ops->mpo_vnode_notify_swap(cred, fvp, mac_vnode_label(fvp), |
495 | tvp, mac_vnode_label(tvp)); |
496 | MAC_PERFORM_RSLT(vnode_notify_swap, mpc); |
497 | } else if (mpc->mpc_ops->mpo_vnode_notify_rename != NULL) { |
498 | MAC_PERFORM_CALL(vnode_notify_swap_rename, mpc); |
499 | /* Call notify_rename twice, one for each member of the swap. */ |
500 | mpc->mpc_ops->mpo_vnode_notify_rename(cred, fvp, mac_vnode_label(fvp), |
501 | tdvp, mac_vnode_label(tdvp), tcnp); |
502 | mpc->mpc_ops->mpo_vnode_notify_rename(cred, tvp, mac_vnode_label(tvp), |
503 | fdvp, mac_vnode_label(fdvp), fcnp); |
504 | MAC_PERFORM_RSLT(vnode_notify_swap_rename, mpc); |
505 | } |
506 | } else if (mpc->mpc_ops->mpo_vnode_notify_rename != NULL) { |
507 | MAC_PERFORM_CALL(vnode_notify_rename, mpc); |
508 | mpc->mpc_ops->mpo_vnode_notify_rename(cred, fvp, mac_vnode_label(fvp), |
509 | tdvp, mac_vnode_label(tdvp), tcnp); |
510 | MAC_PERFORM_RSLT(vnode_notify_rename, mpc); |
511 | } |
512 | /* END IGNORE CODESTYLE */ |
513 | }); |
514 | VFS_KERNEL_DEBUG_END1(13, fvp); |
515 | } |
516 | |
517 | void |
518 | mac_vnode_notify_open(vfs_context_t ctx, struct vnode *vp, int acc_flags) |
519 | { |
520 | kauth_cred_t cred; |
521 | |
522 | #if SECURITY_MAC_CHECK_ENFORCE |
523 | /* 21167099 - only check if we allow write */ |
524 | if (!mac_vnode_enforce) { |
525 | return; |
526 | } |
527 | #endif |
528 | cred = vfs_context_ucred(ctx); |
529 | if (!mac_cred_check_enforce(cred)) { |
530 | return; |
531 | } |
532 | VFS_KERNEL_DEBUG_START1(14, vp); |
533 | MAC_PERFORM(vnode_notify_open, cred, vp, mac_vnode_label(vp), acc_flags); |
534 | VFS_KERNEL_DEBUG_END1(14, vp); |
535 | } |
536 | |
537 | void |
538 | mac_vnode_notify_link(vfs_context_t ctx, struct vnode *vp, |
539 | struct vnode *dvp, struct componentname *cnp) |
540 | { |
541 | kauth_cred_t cred; |
542 | |
543 | #if SECURITY_MAC_CHECK_ENFORCE |
544 | /* 21167099 - only check if we allow write */ |
545 | if (!mac_vnode_enforce) { |
546 | return; |
547 | } |
548 | #endif |
549 | cred = vfs_context_ucred(ctx); |
550 | if (!mac_cred_check_enforce(cred)) { |
551 | return; |
552 | } |
553 | VFS_KERNEL_DEBUG_START1(15, vp); |
554 | MAC_PERFORM(vnode_notify_link, cred, dvp, mac_vnode_label(dvp), vp, mac_vnode_label(vp), cnp); |
555 | VFS_KERNEL_DEBUG_END1(15, vp); |
556 | } |
557 | |
558 | void |
559 | mac_vnode_notify_deleteextattr(vfs_context_t ctx, struct vnode *vp, const char *name) |
560 | { |
561 | kauth_cred_t cred; |
562 | |
563 | #if SECURITY_MAC_CHECK_ENFORCE |
564 | /* 21167099 - only check if we allow write */ |
565 | if (!mac_vnode_enforce) { |
566 | return; |
567 | } |
568 | #endif |
569 | cred = vfs_context_ucred(ctx); |
570 | if (!mac_cred_check_enforce(cred)) { |
571 | return; |
572 | } |
573 | VFS_KERNEL_DEBUG_START1(16, vp); |
574 | MAC_PERFORM(vnode_notify_deleteextattr, cred, vp, mac_vnode_label(vp), name); |
575 | VFS_KERNEL_DEBUG_END1(16, vp); |
576 | } |
577 | |
578 | void |
579 | mac_vnode_notify_setacl(vfs_context_t ctx, struct vnode *vp, struct kauth_acl *acl) |
580 | { |
581 | kauth_cred_t cred; |
582 | |
583 | #if SECURITY_MAC_CHECK_ENFORCE |
584 | /* 21167099 - only check if we allow write */ |
585 | if (!mac_vnode_enforce) { |
586 | return; |
587 | } |
588 | #endif |
589 | cred = vfs_context_ucred(ctx); |
590 | if (!mac_cred_check_enforce(cred)) { |
591 | return; |
592 | } |
593 | VFS_KERNEL_DEBUG_START1(17, vp); |
594 | MAC_PERFORM(vnode_notify_setacl, cred, vp, mac_vnode_label(vp), acl); |
595 | VFS_KERNEL_DEBUG_END1(17, vp); |
596 | } |
597 | |
598 | void |
599 | mac_vnode_notify_setattrlist(vfs_context_t ctx, struct vnode *vp, struct attrlist *alist) |
600 | { |
601 | kauth_cred_t cred; |
602 | |
603 | #if SECURITY_MAC_CHECK_ENFORCE |
604 | /* 21167099 - only check if we allow write */ |
605 | if (!mac_vnode_enforce) { |
606 | return; |
607 | } |
608 | #endif |
609 | cred = vfs_context_ucred(ctx); |
610 | if (!mac_cred_check_enforce(cred)) { |
611 | return; |
612 | } |
613 | VFS_KERNEL_DEBUG_START1(18, vp); |
614 | MAC_PERFORM(vnode_notify_setattrlist, cred, vp, mac_vnode_label(vp), alist); |
615 | VFS_KERNEL_DEBUG_END1(18, vp); |
616 | } |
617 | |
618 | void |
619 | mac_vnode_notify_setextattr(vfs_context_t ctx, struct vnode *vp, const char *name, struct uio *uio) |
620 | { |
621 | kauth_cred_t cred; |
622 | |
623 | #if SECURITY_MAC_CHECK_ENFORCE |
624 | /* 21167099 - only check if we allow write */ |
625 | if (!mac_vnode_enforce) { |
626 | return; |
627 | } |
628 | #endif |
629 | cred = vfs_context_ucred(ctx); |
630 | if (!mac_cred_check_enforce(cred)) { |
631 | return; |
632 | } |
633 | VFS_KERNEL_DEBUG_START1(19, vp); |
634 | MAC_PERFORM(vnode_notify_setextattr, cred, vp, mac_vnode_label(vp), name, uio); |
635 | VFS_KERNEL_DEBUG_END1(19, vp); |
636 | } |
637 | |
638 | void |
639 | mac_vnode_notify_setflags(vfs_context_t ctx, struct vnode *vp, u_long flags) |
640 | { |
641 | kauth_cred_t cred; |
642 | |
643 | #if SECURITY_MAC_CHECK_ENFORCE |
644 | /* 21167099 - only check if we allow write */ |
645 | if (!mac_vnode_enforce) { |
646 | return; |
647 | } |
648 | #endif |
649 | cred = vfs_context_ucred(ctx); |
650 | if (!mac_cred_check_enforce(cred)) { |
651 | return; |
652 | } |
653 | VFS_KERNEL_DEBUG_START1(20, vp); |
654 | MAC_PERFORM(vnode_notify_setflags, cred, vp, mac_vnode_label(vp), flags); |
655 | VFS_KERNEL_DEBUG_END1(20, vp); |
656 | } |
657 | |
658 | void |
659 | mac_vnode_notify_setmode(vfs_context_t ctx, struct vnode *vp, mode_t mode) |
660 | { |
661 | kauth_cred_t cred; |
662 | |
663 | #if SECURITY_MAC_CHECK_ENFORCE |
664 | /* 21167099 - only check if we allow write */ |
665 | if (!mac_vnode_enforce) { |
666 | return; |
667 | } |
668 | #endif |
669 | cred = vfs_context_ucred(ctx); |
670 | if (!mac_cred_check_enforce(cred)) { |
671 | return; |
672 | } |
673 | VFS_KERNEL_DEBUG_START1(21, vp); |
674 | MAC_PERFORM(vnode_notify_setmode, cred, vp, mac_vnode_label(vp), mode); |
675 | VFS_KERNEL_DEBUG_END1(21, vp); |
676 | } |
677 | |
678 | void |
679 | mac_vnode_notify_setowner(vfs_context_t ctx, struct vnode *vp, uid_t uid, gid_t gid) |
680 | { |
681 | kauth_cred_t cred; |
682 | |
683 | #if SECURITY_MAC_CHECK_ENFORCE |
684 | /* 21167099 - only check if we allow write */ |
685 | if (!mac_vnode_enforce) { |
686 | return; |
687 | } |
688 | #endif |
689 | cred = vfs_context_ucred(ctx); |
690 | if (!mac_cred_check_enforce(cred)) { |
691 | return; |
692 | } |
693 | VFS_KERNEL_DEBUG_START1(22, vp); |
694 | MAC_PERFORM(vnode_notify_setowner, cred, vp, mac_vnode_label(vp), uid, gid); |
695 | VFS_KERNEL_DEBUG_END1(22, vp); |
696 | } |
697 | |
698 | void |
699 | mac_vnode_notify_setutimes(vfs_context_t ctx, struct vnode *vp, struct timespec atime, struct timespec mtime) |
700 | { |
701 | kauth_cred_t cred; |
702 | |
703 | #if SECURITY_MAC_CHECK_ENFORCE |
704 | /* 21167099 - only check if we allow write */ |
705 | if (!mac_vnode_enforce) { |
706 | return; |
707 | } |
708 | #endif |
709 | cred = vfs_context_ucred(ctx); |
710 | if (!mac_cred_check_enforce(cred)) { |
711 | return; |
712 | } |
713 | VFS_KERNEL_DEBUG_START1(23, vp); |
714 | MAC_PERFORM(vnode_notify_setutimes, cred, vp, mac_vnode_label(vp), atime, mtime); |
715 | VFS_KERNEL_DEBUG_END1(23, vp); |
716 | } |
717 | |
718 | void |
719 | mac_vnode_notify_truncate(vfs_context_t ctx, kauth_cred_t file_cred, struct vnode *vp) |
720 | { |
721 | kauth_cred_t cred; |
722 | |
723 | #if SECURITY_MAC_CHECK_ENFORCE |
724 | /* 21167099 - only check if we allow write */ |
725 | if (!mac_vnode_enforce) { |
726 | return; |
727 | } |
728 | #endif |
729 | cred = vfs_context_ucred(ctx); |
730 | if (!mac_cred_check_enforce(cred)) { |
731 | return; |
732 | } |
733 | VFS_KERNEL_DEBUG_START1(24, vp); |
734 | MAC_PERFORM(vnode_notify_truncate, cred, file_cred, vp, mac_vnode_label(vp)); |
735 | VFS_KERNEL_DEBUG_END1(24, vp); |
736 | } |
737 | |
738 | /* |
739 | * Extended attribute 'name' was updated via |
740 | * vn_setxattr() or vn_removexattr(). Allow the |
741 | * policy to update the vnode label. |
742 | */ |
743 | void |
744 | mac_vnode_label_update_extattr(struct mount *mp, struct vnode *vp, |
745 | const char *name) |
746 | { |
747 | int error = 0; |
748 | |
749 | #if SECURITY_MAC_CHECK_ENFORCE |
750 | /* 21167099 - only check if we allow write */ |
751 | if (!mac_vnode_enforce) { |
752 | return; |
753 | } |
754 | #endif |
755 | if (!mac_label_vnodes) { |
756 | return; |
757 | } |
758 | |
759 | VFS_KERNEL_DEBUG_START1(25, vp); |
760 | MAC_PERFORM(vnode_label_update_extattr, mp, mac_mount_label(mp), vp, |
761 | mac_vnode_label(vp), name); |
762 | VFS_KERNEL_DEBUG_END1(25, vp); |
763 | if (error == 0) { |
764 | return; |
765 | } |
766 | |
767 | vnode_lock(vp); |
768 | vnode_relabel(vp); |
769 | vnode_unlock(vp); |
770 | return; |
771 | } |
772 | |
773 | static int |
774 | mac_vnode_label_store(vfs_context_t ctx, struct vnode *vp, |
775 | struct label *intlabel) |
776 | { |
777 | kauth_cred_t cred; |
778 | int error; |
779 | |
780 | #if SECURITY_MAC_CHECK_ENFORCE |
781 | /* 21167099 - only check if we allow write */ |
782 | if (!mac_vnode_enforce) { |
783 | return 0; |
784 | } |
785 | #endif |
786 | if (!mac_label_vnodes) { |
787 | return 0; |
788 | } |
789 | |
790 | cred = vfs_context_ucred(ctx); |
791 | if (!mac_cred_check_enforce(cred)) { |
792 | return 0; |
793 | } |
794 | VFS_KERNEL_DEBUG_START1(26, vp); |
795 | MAC_CHECK(vnode_label_store, cred, vp, mac_vnode_label(vp), intlabel); |
796 | VFS_KERNEL_DEBUG_END1(26, vp); |
797 | |
798 | return error; |
799 | } |
800 | |
801 | void |
802 | mac_cred_label_update_execve(vfs_context_t ctx, kauth_cred_t new, struct vnode *vp, off_t offset, |
803 | struct vnode *scriptvp, struct label *scriptvnodelabel, struct label *execl, u_int *csflags, |
804 | void *macextensions, int *disjoint, int *labelupdateerror) |
805 | { |
806 | kauth_cred_t cred; |
807 | *disjoint = 0; |
808 | int error; |
809 | posix_cred_t pcred = posix_cred_get(cred: new); |
810 | |
811 | #if SECURITY_MAC_CHECK_ENFORCE |
812 | /* 21167099 - only check if we allow write */ |
813 | if (!mac_proc_enforce || !mac_vnode_enforce) { |
814 | return; |
815 | } |
816 | #endif |
817 | |
818 | /* mark the new cred to indicate "matching" includes the label */ |
819 | pcred->cr_flags |= CRF_MAC_ENFORCE; |
820 | |
821 | cred = vfs_context_ucred(ctx); |
822 | |
823 | /* |
824 | * NB: Cannot use MAC_CHECK macro because we need a sequence point after |
825 | * calling exec_spawnattr_getmacpolicyinfo() and before passing the |
826 | * spawnattrlen as an argument to the hook. |
827 | */ |
828 | VFS_KERNEL_DEBUG_START1(27, vp); |
829 | { |
830 | struct mac_policy_conf *mpc; |
831 | u_int i; |
832 | |
833 | error = 0; |
834 | for (i = 0; i < mac_policy_list.staticmax; i++) { |
835 | mpc = mac_policy_list.entries[i].mpc; |
836 | if (mpc == NULL) { |
837 | continue; |
838 | } |
839 | |
840 | mpo_cred_label_update_execve_t *hook = mpc->mpc_ops->mpo_cred_label_update_execve; |
841 | if (hook == NULL) { |
842 | continue; |
843 | } |
844 | |
845 | size_t spawnattrlen = 0; |
846 | void *spawnattr = exec_spawnattr_getmacpolicyinfo(macextensions, policyname: mpc->mpc_name, lenp: &spawnattrlen); |
847 | |
848 | error = mac_error_select(error1: hook(cred, new, vfs_context_proc(ctx), vp, offset, scriptvp, |
849 | mac_vnode_label(vp), scriptvnodelabel, execl, csflags, spawnattr, spawnattrlen, disjoint), |
850 | error2: error); |
851 | } |
852 | if (mac_policy_list_conditional_busy() != 0) { |
853 | for (; i <= mac_policy_list.maxindex; i++) { |
854 | mpc = mac_policy_list.entries[i].mpc; |
855 | if (mpc == NULL) { |
856 | continue; |
857 | } |
858 | |
859 | mpo_cred_label_update_execve_t *hook = mpc->mpc_ops->mpo_cred_label_update_execve; |
860 | if (hook == NULL) { |
861 | continue; |
862 | } |
863 | |
864 | size_t spawnattrlen = 0; |
865 | void *spawnattr = exec_spawnattr_getmacpolicyinfo(macextensions, policyname: mpc->mpc_name, lenp: &spawnattrlen); |
866 | |
867 | error = mac_error_select(error1: hook(cred, new, vfs_context_proc(ctx), vp, offset, scriptvp, |
868 | mac_vnode_label(vp), scriptvnodelabel, execl, csflags, spawnattr, spawnattrlen, disjoint), |
869 | error2: error); |
870 | } |
871 | mac_policy_list_unbusy(); |
872 | } |
873 | } |
874 | *labelupdateerror = error; |
875 | VFS_KERNEL_DEBUG_END1(27, vp); |
876 | } |
877 | |
878 | int |
879 | mac_cred_check_label_update_execve(vfs_context_t ctx, struct vnode *vp, off_t offset, |
880 | struct vnode *scriptvp, struct label *scriptvnodelabel, struct label *execlabel, |
881 | struct proc *p, void *macextensions) |
882 | { |
883 | kauth_cred_t cred; |
884 | int result = 0; |
885 | |
886 | #if SECURITY_MAC_CHECK_ENFORCE |
887 | /* 21167099 - only check if we allow write */ |
888 | if (!mac_proc_enforce || !mac_vnode_enforce) { |
889 | return result; |
890 | } |
891 | #endif |
892 | |
893 | cred = vfs_context_ucred(ctx); |
894 | |
895 | VFS_KERNEL_DEBUG_START1(28, vp); |
896 | /* |
897 | * NB: Cannot use MAC_BOOLEAN macro because we need a sequence point after |
898 | * calling exec_spawnattr_getmacpolicyinfo() and before passing the |
899 | * spawnattrlen as an argument to the hook. |
900 | */ |
901 | { |
902 | struct mac_policy_conf *mpc; |
903 | u_int i; |
904 | |
905 | for (i = 0; i < mac_policy_list.staticmax; i++) { |
906 | mpc = mac_policy_list.entries[i].mpc; |
907 | if (mpc == NULL) { |
908 | continue; |
909 | } |
910 | |
911 | mpo_cred_check_label_update_execve_t *hook = mpc->mpc_ops->mpo_cred_check_label_update_execve; |
912 | if (hook == NULL) { |
913 | continue; |
914 | } |
915 | |
916 | size_t spawnattrlen = 0; |
917 | void *spawnattr = exec_spawnattr_getmacpolicyinfo(macextensions, policyname: mpc->mpc_name, lenp: &spawnattrlen); |
918 | |
919 | result = result || hook(cred, vp, offset, scriptvp, mac_vnode_label(vp), scriptvnodelabel, execlabel, p, spawnattr, spawnattrlen); |
920 | } |
921 | if (mac_policy_list_conditional_busy() != 0) { |
922 | for (; i <= mac_policy_list.maxindex; i++) { |
923 | mpc = mac_policy_list.entries[i].mpc; |
924 | if (mpc == NULL) { |
925 | continue; |
926 | } |
927 | |
928 | mpo_cred_check_label_update_execve_t *hook = mpc->mpc_ops->mpo_cred_check_label_update_execve; |
929 | if (hook == NULL) { |
930 | continue; |
931 | } |
932 | |
933 | size_t spawnattrlen = 0; |
934 | void *spawnattr = exec_spawnattr_getmacpolicyinfo(macextensions, policyname: mpc->mpc_name, lenp: &spawnattrlen); |
935 | |
936 | result = result || hook(cred, vp, offset, scriptvp, mac_vnode_label(vp), scriptvnodelabel, execlabel, p, spawnattr, spawnattrlen); |
937 | } |
938 | mac_policy_list_unbusy(); |
939 | } |
940 | } |
941 | VFS_KERNEL_DEBUG_END1(28, vp); |
942 | |
943 | return result; |
944 | } |
945 | |
946 | int |
947 | mac_vnode_check_access(vfs_context_t ctx, struct vnode *vp, |
948 | int acc_mode) |
949 | { |
950 | kauth_cred_t cred; |
951 | int error; |
952 | int mask; |
953 | |
954 | #if SECURITY_MAC_CHECK_ENFORCE |
955 | /* 21167099 - only check if we allow write */ |
956 | if (!mac_vnode_enforce) { |
957 | return 0; |
958 | } |
959 | #endif |
960 | cred = vfs_context_ucred(ctx); |
961 | if (!mac_cred_check_enforce(cred)) { |
962 | return 0; |
963 | } |
964 | /* Convert {R,W,X}_OK values to V{READ,WRITE,EXEC} for entry points */ |
965 | mask = ACCESS_MODE_TO_VNODE_MASK(acc_mode); |
966 | VFS_KERNEL_DEBUG_START1(29, vp); |
967 | MAC_CHECK(vnode_check_access, cred, vp, mac_vnode_label(vp), mask); |
968 | VFS_KERNEL_DEBUG_END1(29, vp); |
969 | return error; |
970 | } |
971 | |
972 | int |
973 | mac_vnode_check_chdir(vfs_context_t ctx, struct vnode *dvp) |
974 | { |
975 | kauth_cred_t cred; |
976 | int error; |
977 | |
978 | #if SECURITY_MAC_CHECK_ENFORCE |
979 | /* 21167099 - only check if we allow write */ |
980 | if (!mac_vnode_enforce) { |
981 | return 0; |
982 | } |
983 | #endif |
984 | cred = vfs_context_ucred(ctx); |
985 | if (!mac_cred_check_enforce(cred)) { |
986 | return 0; |
987 | } |
988 | VFS_KERNEL_DEBUG_START1(30, dvp); |
989 | MAC_CHECK(vnode_check_chdir, cred, dvp, mac_vnode_label(dvp)); |
990 | VFS_KERNEL_DEBUG_END1(30, dvp); |
991 | return error; |
992 | } |
993 | |
994 | int |
995 | mac_vnode_check_chroot(vfs_context_t ctx, struct vnode *dvp, |
996 | struct componentname *cnp) |
997 | { |
998 | kauth_cred_t cred; |
999 | int error; |
1000 | |
1001 | #if SECURITY_MAC_CHECK_ENFORCE |
1002 | /* 21167099 - only check if we allow write */ |
1003 | if (!mac_vnode_enforce) { |
1004 | return 0; |
1005 | } |
1006 | #endif |
1007 | cred = vfs_context_ucred(ctx); |
1008 | if (!mac_cred_check_enforce(cred)) { |
1009 | return 0; |
1010 | } |
1011 | VFS_KERNEL_DEBUG_START1(31, dvp); |
1012 | MAC_CHECK(vnode_check_chroot, cred, dvp, mac_vnode_label(dvp), cnp); |
1013 | VFS_KERNEL_DEBUG_END1(31, dvp); |
1014 | return error; |
1015 | } |
1016 | |
1017 | int |
1018 | mac_vnode_check_clone(vfs_context_t ctx, struct vnode *dvp, |
1019 | struct vnode *vp, struct componentname *cnp) |
1020 | { |
1021 | kauth_cred_t cred; |
1022 | int error; |
1023 | |
1024 | #if SECURITY_MAC_CHECK_ENFORCE |
1025 | /* 21167099 - only check if we allow write */ |
1026 | if (!mac_vnode_enforce) { |
1027 | return 0; |
1028 | } |
1029 | #endif |
1030 | cred = vfs_context_ucred(ctx); |
1031 | if (!mac_cred_check_enforce(cred)) { |
1032 | return 0; |
1033 | } |
1034 | VFS_KERNEL_DEBUG_START1(32, dvp); |
1035 | MAC_CHECK(vnode_check_clone, cred, dvp, mac_vnode_label(dvp), vp, |
1036 | mac_vnode_label(vp), cnp); |
1037 | VFS_KERNEL_DEBUG_END1(32, dvp); |
1038 | return error; |
1039 | } |
1040 | int |
1041 | mac_vnode_check_create(vfs_context_t ctx, struct vnode *dvp, |
1042 | struct componentname *cnp, struct vnode_attr *vap) |
1043 | { |
1044 | kauth_cred_t cred; |
1045 | int error; |
1046 | |
1047 | #if SECURITY_MAC_CHECK_ENFORCE |
1048 | /* 21167099 - only check if we allow write */ |
1049 | if (!mac_vnode_enforce) { |
1050 | return 0; |
1051 | } |
1052 | #endif |
1053 | cred = vfs_context_ucred(ctx); |
1054 | if (!mac_cred_check_enforce(cred)) { |
1055 | return 0; |
1056 | } |
1057 | VFS_KERNEL_DEBUG_START1(33, dvp); |
1058 | MAC_CHECK(vnode_check_create, cred, dvp, mac_vnode_label(dvp), cnp, vap); |
1059 | VFS_KERNEL_DEBUG_END1(33, dvp); |
1060 | return error; |
1061 | } |
1062 | |
1063 | int |
1064 | mac_vnode_check_unlink(vfs_context_t ctx, struct vnode *dvp, struct vnode *vp, |
1065 | struct componentname *cnp) |
1066 | { |
1067 | kauth_cred_t cred; |
1068 | int error; |
1069 | |
1070 | #if SECURITY_MAC_CHECK_ENFORCE |
1071 | /* 21167099 - only check if we allow write */ |
1072 | if (!mac_vnode_enforce) { |
1073 | return 0; |
1074 | } |
1075 | #endif |
1076 | cred = vfs_context_ucred(ctx); |
1077 | if (!mac_cred_check_enforce(cred)) { |
1078 | return 0; |
1079 | } |
1080 | VFS_KERNEL_DEBUG_START1(34, dvp); |
1081 | MAC_CHECK(vnode_check_unlink, cred, dvp, mac_vnode_label(dvp), vp, |
1082 | mac_vnode_label(vp), cnp); |
1083 | VFS_KERNEL_DEBUG_END1(34, dvp); |
1084 | return error; |
1085 | } |
1086 | #if 0 |
1087 | int |
1088 | mac_vnode_check_deleteacl(vfs_context_t ctx, struct vnode *vp, |
1089 | acl_type_t type) |
1090 | { |
1091 | kauth_cred_t cred; |
1092 | int error; |
1093 | |
1094 | #if SECURITY_MAC_CHECK_ENFORCE |
1095 | /* 21167099 - only check if we allow write */ |
1096 | if (!mac_vnode_enforce) { |
1097 | return 0; |
1098 | } |
1099 | #endif |
1100 | cred = vfs_context_ucred(ctx); |
1101 | if (!mac_cred_check_enforce(cred)) { |
1102 | return 0; |
1103 | } |
1104 | VFS_KERNEL_DEBUG_START1(35, dvp); |
1105 | MAC_CHECK(vnode_check_deleteacl, cred, vp, mac_vnode_label(vp), type); |
1106 | VFS_KERNEL_DEBUG_END1(35, dvp); |
1107 | return error; |
1108 | } |
1109 | #endif |
1110 | |
1111 | int |
1112 | mac_vnode_check_deleteextattr(vfs_context_t ctx, struct vnode *vp, |
1113 | const char *name) |
1114 | { |
1115 | kauth_cred_t cred; |
1116 | int error; |
1117 | |
1118 | #if SECURITY_MAC_CHECK_ENFORCE |
1119 | /* 21167099 - only check if we allow write */ |
1120 | if (!mac_vnode_enforce) { |
1121 | return 0; |
1122 | } |
1123 | #endif |
1124 | cred = vfs_context_ucred(ctx); |
1125 | if (!mac_cred_check_enforce(cred)) { |
1126 | return 0; |
1127 | } |
1128 | VFS_KERNEL_DEBUG_START1(36, vp); |
1129 | MAC_CHECK(vnode_check_deleteextattr, cred, vp, mac_vnode_label(vp), name); |
1130 | VFS_KERNEL_DEBUG_END1(36, vp); |
1131 | return error; |
1132 | } |
1133 | int |
1134 | mac_vnode_check_exchangedata(vfs_context_t ctx, |
1135 | struct vnode *v1, struct vnode *v2) |
1136 | { |
1137 | kauth_cred_t cred; |
1138 | int error; |
1139 | |
1140 | #if SECURITY_MAC_CHECK_ENFORCE |
1141 | /* 21167099 - only check if we allow write */ |
1142 | if (!mac_vnode_enforce) { |
1143 | return 0; |
1144 | } |
1145 | #endif |
1146 | cred = vfs_context_ucred(ctx); |
1147 | if (!mac_cred_check_enforce(cred)) { |
1148 | return 0; |
1149 | } |
1150 | VFS_KERNEL_DEBUG_START1(37, v1); |
1151 | MAC_CHECK(vnode_check_exchangedata, cred, v1, mac_vnode_label(v1), |
1152 | v2, mac_vnode_label(v2)); |
1153 | VFS_KERNEL_DEBUG_END1(37, v1); |
1154 | |
1155 | return error; |
1156 | } |
1157 | |
1158 | #if 0 |
1159 | int |
1160 | mac_vnode_check_getacl(vfs_context_t ctx, struct vnode *vp, acl_type_t type) |
1161 | { |
1162 | kauth_cred_t cred; |
1163 | int error; |
1164 | |
1165 | #if SECURITY_MAC_CHECK_ENFORCE |
1166 | /* 21167099 - only check if we allow write */ |
1167 | if (!mac_vnode_enforce) { |
1168 | return 0; |
1169 | } |
1170 | #endif |
1171 | cred = vfs_context_ucred(ctx); |
1172 | if (!mac_cred_check_enforce(cred)) { |
1173 | return 0; |
1174 | } |
1175 | VFS_KERNEL_DEBUG_START1(38, vp); |
1176 | MAC_CHECK(vnode_check_getacl, cred, vp, mac_vnode_label(vp), type); |
1177 | VFS_KERNEL_DEBUG_END1(38, vp); |
1178 | return error; |
1179 | } |
1180 | #endif |
1181 | |
1182 | int |
1183 | mac_vnode_check_getattr(vfs_context_t ctx, struct ucred *file_cred, |
1184 | struct vnode *vp, struct vnode_attr *va) |
1185 | { |
1186 | kauth_cred_t cred; |
1187 | int error; |
1188 | |
1189 | #if SECURITY_MAC_CHECK_ENFORCE |
1190 | /* 21167099 - only check if we allow write */ |
1191 | if (!mac_vnode_enforce) { |
1192 | return 0; |
1193 | } |
1194 | #endif |
1195 | cred = vfs_context_ucred(ctx); |
1196 | if (!mac_cred_check_enforce(cred)) { |
1197 | return 0; |
1198 | } |
1199 | VFS_KERNEL_DEBUG_START1(39, vp); |
1200 | MAC_CHECK(vnode_check_getattr, cred, file_cred, vp, mac_vnode_label(vp), va); |
1201 | VFS_KERNEL_DEBUG_END1(39, vp); |
1202 | return error; |
1203 | } |
1204 | |
1205 | int |
1206 | mac_vnode_check_getattrlist(vfs_context_t ctx, struct vnode *vp, |
1207 | struct attrlist *alist, uint64_t options) |
1208 | { |
1209 | kauth_cred_t cred; |
1210 | int error; |
1211 | |
1212 | #if SECURITY_MAC_CHECK_ENFORCE |
1213 | /* 21167099 - only check if we allow write */ |
1214 | if (!mac_vnode_enforce) { |
1215 | return 0; |
1216 | } |
1217 | #endif |
1218 | cred = vfs_context_ucred(ctx); |
1219 | if (!mac_cred_check_enforce(cred)) { |
1220 | return 0; |
1221 | } |
1222 | VFS_KERNEL_DEBUG_START1(40, vp); |
1223 | MAC_CHECK(vnode_check_getattrlist, cred, vp, mac_vnode_label(vp), alist, options); |
1224 | VFS_KERNEL_DEBUG_END1(40, vp); |
1225 | |
1226 | /* Falsify results instead of returning error? */ |
1227 | return error; |
1228 | } |
1229 | |
1230 | int |
1231 | mac_vnode_check_exec(vfs_context_t ctx, struct vnode *vp, |
1232 | struct image_params *imgp) |
1233 | { |
1234 | kauth_cred_t cred; |
1235 | int error = 0; |
1236 | |
1237 | #if SECURITY_MAC_CHECK_ENFORCE |
1238 | /* 21167099 - only check if we allow write */ |
1239 | if (!mac_proc_enforce || !mac_vnode_enforce) { |
1240 | return 0; |
1241 | } |
1242 | #endif |
1243 | |
1244 | cred = vfs_context_ucred(ctx); |
1245 | |
1246 | /* |
1247 | * NB: Cannot use MAC_CHECK macro because we need a sequence point after |
1248 | * calling exec_spawnattr_getmacpolicyinfo() and before passing the |
1249 | * spawnattrlen as an argument to the hook. |
1250 | */ |
1251 | VFS_KERNEL_DEBUG_START1(41, vp); |
1252 | { |
1253 | struct mac_policy_conf *mpc; |
1254 | u_int i; |
1255 | |
1256 | for (i = 0; i < mac_policy_list.staticmax; i++) { |
1257 | mpc = mac_policy_list.entries[i].mpc; |
1258 | if (mpc == NULL) { |
1259 | continue; |
1260 | } |
1261 | |
1262 | mpo_vnode_check_exec_t *hook = mpc->mpc_ops->mpo_vnode_check_exec; |
1263 | if (hook == NULL) { |
1264 | continue; |
1265 | } |
1266 | |
1267 | size_t spawnattrlen = 0; |
1268 | void *spawnattr = exec_spawnattr_getmacpolicyinfo(macextensions: &imgp->ip_px_smpx, policyname: mpc->mpc_name, lenp: &spawnattrlen); |
1269 | |
1270 | error = mac_error_select( |
1271 | error1: hook(cred, |
1272 | vp, imgp->ip_scriptvp, mac_vnode_label(vp), imgp->ip_scriptlabelp, |
1273 | imgp->ip_execlabelp, &imgp->ip_ndp->ni_cnd, &imgp->ip_csflags, |
1274 | spawnattr, spawnattrlen), error2: error); |
1275 | } |
1276 | if (mac_policy_list_conditional_busy() != 0) { |
1277 | for (; i <= mac_policy_list.maxindex; i++) { |
1278 | mpc = mac_policy_list.entries[i].mpc; |
1279 | if (mpc == NULL) { |
1280 | continue; |
1281 | } |
1282 | |
1283 | mpo_vnode_check_exec_t *hook = mpc->mpc_ops->mpo_vnode_check_exec; |
1284 | if (hook == NULL) { |
1285 | continue; |
1286 | } |
1287 | |
1288 | size_t spawnattrlen = 0; |
1289 | void *spawnattr = exec_spawnattr_getmacpolicyinfo(macextensions: &imgp->ip_px_smpx, policyname: mpc->mpc_name, lenp: &spawnattrlen); |
1290 | |
1291 | error = mac_error_select( |
1292 | error1: hook(cred, |
1293 | vp, imgp->ip_scriptvp, mac_vnode_label(vp), imgp->ip_scriptlabelp, |
1294 | imgp->ip_execlabelp, &imgp->ip_ndp->ni_cnd, &imgp->ip_csflags, |
1295 | spawnattr, spawnattrlen), error2: error); |
1296 | } |
1297 | mac_policy_list_unbusy(); |
1298 | } |
1299 | } |
1300 | VFS_KERNEL_DEBUG_END1(41, vp); |
1301 | |
1302 | return error; |
1303 | } |
1304 | |
1305 | int |
1306 | mac_vnode_check_fsgetpath(vfs_context_t ctx, struct vnode *vp) |
1307 | { |
1308 | kauth_cred_t cred; |
1309 | int error; |
1310 | |
1311 | #if SECURITY_MAC_CHECK_ENFORCE |
1312 | /* 21167099 - only check if we allow write */ |
1313 | if (!mac_vnode_enforce) { |
1314 | return 0; |
1315 | } |
1316 | #endif |
1317 | cred = vfs_context_ucred(ctx); |
1318 | if (!mac_cred_check_enforce(cred)) { |
1319 | return 0; |
1320 | } |
1321 | VFS_KERNEL_DEBUG_START1(42, vp); |
1322 | MAC_CHECK(vnode_check_fsgetpath, cred, vp, mac_vnode_label(vp)); |
1323 | VFS_KERNEL_DEBUG_END1(42, vp); |
1324 | return error; |
1325 | } |
1326 | |
1327 | int |
1328 | mac_vnode_check_signature(struct vnode *vp, struct cs_blob *cs_blob, |
1329 | struct image_params *imgp, |
1330 | unsigned int *cs_flags, unsigned int *signer_type, |
1331 | int flags, unsigned int platform) |
1332 | { |
1333 | int error; |
1334 | char *fatal_failure_desc = NULL; |
1335 | size_t fatal_failure_desc_len = 0; |
1336 | |
1337 | char *vn_path = NULL; |
1338 | vm_size_t vn_pathlen = MAXPATHLEN; |
1339 | cpu_type_t cpu_type = (imgp == NULL) ? CPU_TYPE_ANY : imgp->ip_origcputype; |
1340 | |
1341 | |
1342 | #if SECURITY_MAC_CHECK_ENFORCE |
1343 | /* 21167099 - only check if we allow write */ |
1344 | if (!mac_proc_enforce || !mac_vnode_enforce) { |
1345 | return 0; |
1346 | } |
1347 | #endif |
1348 | |
1349 | VFS_KERNEL_DEBUG_START1(43, vp); |
1350 | MAC_CHECK(vnode_check_signature, vp, mac_vnode_label(vp), cpu_type, cs_blob, |
1351 | cs_flags, signer_type, flags, platform, &fatal_failure_desc, &fatal_failure_desc_len); |
1352 | VFS_KERNEL_DEBUG_END1(43, vp); |
1353 | |
1354 | if (fatal_failure_desc_len) { |
1355 | // A fatal code signature validation failure occured, formulate a crash |
1356 | // reason. |
1357 | |
1358 | char const *path = NULL; |
1359 | |
1360 | vn_path = zalloc(view: ZV_NAMEI); |
1361 | if (vn_getpath(vp, pathbuf: vn_path, len: (int*)&vn_pathlen) == 0) { |
1362 | path = vn_path; |
1363 | } else { |
1364 | path = "(get vnode path failed)" ; |
1365 | } |
1366 | |
1367 | if (error == 0) { |
1368 | panic("mac_vnode_check_signature: MAC hook returned no error, " |
1369 | "but status is claimed to be fatal? " |
1370 | "path: '%s', fatal_failure_desc_len: %ld, fatal_failure_desc:\n%s\n" , |
1371 | path, fatal_failure_desc_len, fatal_failure_desc); |
1372 | } |
1373 | |
1374 | printf("mac_vnode_check_signature: %s: code signature validation failed fatally: %s" , |
1375 | path, fatal_failure_desc); |
1376 | |
1377 | if (imgp == NULL) { |
1378 | goto out; |
1379 | } |
1380 | |
1381 | os_reason_t reason = os_reason_create(OS_REASON_CODESIGNING, |
1382 | CODESIGNING_EXIT_REASON_TASKGATED_INVALID_SIG); |
1383 | |
1384 | if (reason == OS_REASON_NULL) { |
1385 | printf("mac_vnode_check_signature: %s: failure to allocate exit reason for validation failure: %s\n" , |
1386 | path, fatal_failure_desc); |
1387 | goto out; |
1388 | } |
1389 | |
1390 | imgp->ip_cs_error = reason; |
1391 | reason->osr_flags = (OS_REASON_FLAG_GENERATE_CRASH_REPORT | |
1392 | OS_REASON_FLAG_CONSISTENT_FAILURE); |
1393 | |
1394 | if (fatal_failure_desc == NULL) { |
1395 | // This may happen if allocation for the buffer failed. |
1396 | printf("mac_vnode_check_signature: %s: fatal failure is missing its description.\n" , path); |
1397 | } else { |
1398 | mach_vm_address_t data_addr = 0; |
1399 | |
1400 | int reason_error = 0; |
1401 | int kcdata_error = 0; |
1402 | |
1403 | if ((reason_error = os_reason_alloc_buffer_noblock(cur_reason: reason, osr_bufsize: kcdata_estimate_required_buffer_size |
1404 | (num_items: 1, payload_size: (uint32_t)fatal_failure_desc_len))) == 0 && |
1405 | (kcdata_error = kcdata_get_memory_addr(data: &reason->osr_kcd_descriptor, |
1406 | EXIT_REASON_USER_DESC, size: (uint32_t)fatal_failure_desc_len, |
1407 | user_addr: &data_addr)) == KERN_SUCCESS) { |
1408 | kern_return_t mc_error = kcdata_memcpy(data: &reason->osr_kcd_descriptor, dst_addr: (mach_vm_address_t)data_addr, |
1409 | src_addr: fatal_failure_desc, size: (uint32_t)fatal_failure_desc_len); |
1410 | |
1411 | if (mc_error != KERN_SUCCESS) { |
1412 | printf("mac_vnode_check_signature: %s: failed to copy reason string " |
1413 | "(kcdata_memcpy error: %d, length: %ld)\n" , |
1414 | path, mc_error, fatal_failure_desc_len); |
1415 | } |
1416 | } else { |
1417 | printf("mac_vnode_check_signature: %s: failed to allocate space for reason string " |
1418 | "(os_reason_alloc_buffer error: %d, kcdata error: %d, length: %ld)\n" , |
1419 | path, reason_error, kcdata_error, fatal_failure_desc_len); |
1420 | } |
1421 | } |
1422 | } |
1423 | |
1424 | out: |
1425 | if (vn_path) { |
1426 | zfree(ZV_NAMEI, vn_path); |
1427 | } |
1428 | |
1429 | if (fatal_failure_desc_len > 0 && fatal_failure_desc != NULL) { |
1430 | /* KERN_AMFI_SUPPORTS_DATA_ALLOC >= 2 */ |
1431 | kfree_data(fatal_failure_desc, fatal_failure_desc_len); |
1432 | } |
1433 | |
1434 | return error; |
1435 | } |
1436 | |
1437 | int |
1438 | mac_vnode_check_supplemental_signature(struct vnode *vp, |
1439 | struct cs_blob *cs_blob, struct vnode *linked_vp, |
1440 | struct cs_blob *linked_cs_blob, unsigned int *signer_type) |
1441 | { |
1442 | int error; |
1443 | |
1444 | #if SECURITY_MAC_CHECK_ENFORCE |
1445 | /* 21167099 - only check if we allow write */ |
1446 | if (!mac_proc_enforce || !mac_vnode_enforce) { |
1447 | return 0; |
1448 | } |
1449 | #endif |
1450 | VFS_KERNEL_DEBUG_START1(93, vp); |
1451 | MAC_CHECK(vnode_check_supplemental_signature, vp, mac_vnode_label(vp), cs_blob, linked_vp, linked_cs_blob, |
1452 | signer_type); |
1453 | VFS_KERNEL_DEBUG_END1(93, vp); |
1454 | |
1455 | return error; |
1456 | } |
1457 | |
1458 | #if 0 |
1459 | int |
1460 | mac_vnode_check_getacl(vfs_context_t ctx, struct vnode *vp, acl_type_t type) |
1461 | { |
1462 | kauth_cred_t cred; |
1463 | int error; |
1464 | |
1465 | #if SECURITY_MAC_CHECK_ENFORCE |
1466 | /* 21167099 - only check if we allow write */ |
1467 | if (!mac_vnode_enforce) { |
1468 | return 0; |
1469 | } |
1470 | #endif |
1471 | cred = vfs_context_ucred(ctx); |
1472 | if (!mac_cred_check_enforce(cred)) { |
1473 | return 0; |
1474 | } |
1475 | VFS_KERNEL_DEBUG_START1(44, vp); |
1476 | MAC_CHECK(vnode_check_getacl, cred, vp, mac_vnode_label(vp), type); |
1477 | VFS_KERNEL_DEBUG_END1(44, vp); |
1478 | return error; |
1479 | } |
1480 | #endif |
1481 | |
1482 | int |
1483 | mac_vnode_check_getextattr(vfs_context_t ctx, struct vnode *vp, |
1484 | const char *name, struct uio *uio) |
1485 | { |
1486 | kauth_cred_t cred; |
1487 | int error; |
1488 | |
1489 | #if SECURITY_MAC_CHECK_ENFORCE |
1490 | /* 21167099 - only check if we allow write */ |
1491 | if (!mac_vnode_enforce) { |
1492 | return 0; |
1493 | } |
1494 | #endif |
1495 | cred = vfs_context_ucred(ctx); |
1496 | if (!mac_cred_check_enforce(cred)) { |
1497 | return 0; |
1498 | } |
1499 | VFS_KERNEL_DEBUG_START1(45, vp); |
1500 | MAC_CHECK(vnode_check_getextattr, cred, vp, mac_vnode_label(vp), |
1501 | name, uio); |
1502 | VFS_KERNEL_DEBUG_END1(45, vp); |
1503 | return error; |
1504 | } |
1505 | |
1506 | int |
1507 | mac_vnode_check_ioctl(vfs_context_t ctx, struct vnode *vp, u_long cmd) |
1508 | { |
1509 | kauth_cred_t cred; |
1510 | int error; |
1511 | |
1512 | #if SECURITY_MAC_CHECK_ENFORCE |
1513 | /* 21167099 - only check if we allow write */ |
1514 | if (!mac_vnode_enforce) { |
1515 | return 0; |
1516 | } |
1517 | #endif |
1518 | cred = vfs_context_ucred(ctx); |
1519 | if (!mac_cred_check_enforce(cred)) { |
1520 | return 0; |
1521 | } |
1522 | VFS_KERNEL_DEBUG_START1(46, vp); |
1523 | MAC_CHECK(vnode_check_ioctl, cred, vp, mac_vnode_label(vp), cmd); |
1524 | VFS_KERNEL_DEBUG_END1(46, vp); |
1525 | return error; |
1526 | } |
1527 | |
1528 | int |
1529 | mac_vnode_check_kqfilter(vfs_context_t ctx, kauth_cred_t file_cred, |
1530 | struct knote *kn, struct vnode *vp) |
1531 | { |
1532 | kauth_cred_t cred; |
1533 | int error; |
1534 | |
1535 | #if SECURITY_MAC_CHECK_ENFORCE |
1536 | /* 21167099 - only check if we allow write */ |
1537 | if (!mac_vnode_enforce) { |
1538 | return 0; |
1539 | } |
1540 | #endif |
1541 | cred = vfs_context_ucred(ctx); |
1542 | if (!mac_cred_check_enforce(cred)) { |
1543 | return 0; |
1544 | } |
1545 | VFS_KERNEL_DEBUG_START1(47, vp); |
1546 | MAC_CHECK(vnode_check_kqfilter, cred, file_cred, kn, vp, |
1547 | mac_vnode_label(vp)); |
1548 | VFS_KERNEL_DEBUG_END1(47, vp); |
1549 | |
1550 | return error; |
1551 | } |
1552 | |
1553 | int |
1554 | mac_vnode_check_link(vfs_context_t ctx, struct vnode *dvp, |
1555 | struct vnode *vp, struct componentname *cnp) |
1556 | { |
1557 | kauth_cred_t cred; |
1558 | int error; |
1559 | |
1560 | #if SECURITY_MAC_CHECK_ENFORCE |
1561 | /* 21167099 - only check if we allow write */ |
1562 | if (!mac_vnode_enforce) { |
1563 | return 0; |
1564 | } |
1565 | #endif |
1566 | cred = vfs_context_ucred(ctx); |
1567 | if (!mac_cred_check_enforce(cred)) { |
1568 | return 0; |
1569 | } |
1570 | VFS_KERNEL_DEBUG_START1(48, vp); |
1571 | MAC_CHECK(vnode_check_link, cred, dvp, mac_vnode_label(dvp), vp, |
1572 | mac_vnode_label(vp), cnp); |
1573 | VFS_KERNEL_DEBUG_END1(48, vp); |
1574 | return error; |
1575 | } |
1576 | |
1577 | int |
1578 | mac_vnode_check_listextattr(vfs_context_t ctx, struct vnode *vp) |
1579 | { |
1580 | kauth_cred_t cred; |
1581 | int error; |
1582 | |
1583 | #if SECURITY_MAC_CHECK_ENFORCE |
1584 | /* 21167099 - only check if we allow write */ |
1585 | if (!mac_vnode_enforce) { |
1586 | return 0; |
1587 | } |
1588 | #endif |
1589 | cred = vfs_context_ucred(ctx); |
1590 | if (!mac_cred_check_enforce(cred)) { |
1591 | return 0; |
1592 | } |
1593 | VFS_KERNEL_DEBUG_START1(49, vp); |
1594 | MAC_CHECK(vnode_check_listextattr, cred, vp, mac_vnode_label(vp)); |
1595 | VFS_KERNEL_DEBUG_END1(49, vp); |
1596 | return error; |
1597 | } |
1598 | |
1599 | int |
1600 | mac_vnode_check_lookup_preflight(vfs_context_t ctx, struct vnode *dvp, |
1601 | const char *path, size_t pathlen) |
1602 | { |
1603 | kauth_cred_t cred; |
1604 | int error; |
1605 | |
1606 | #if SECURITY_MAC_CHECK_ENFORCE |
1607 | /* 21167099 - only check if we allow write */ |
1608 | if (!mac_vnode_enforce) { |
1609 | return 0; |
1610 | } |
1611 | #endif |
1612 | cred = vfs_context_ucred(ctx); |
1613 | if (!mac_cred_check_enforce(cred)) { |
1614 | return 0; |
1615 | } |
1616 | VFS_KERNEL_DEBUG_START1(50, dvp); |
1617 | MAC_CHECK(vnode_check_lookup_preflight, cred, dvp, mac_vnode_label(dvp), path, pathlen); |
1618 | VFS_KERNEL_DEBUG_END1(50, dvp); |
1619 | return error; |
1620 | } |
1621 | |
1622 | int |
1623 | mac_vnode_check_lookup(vfs_context_t ctx, struct vnode *dvp, |
1624 | struct componentname *cnp) |
1625 | { |
1626 | kauth_cred_t cred; |
1627 | int error; |
1628 | |
1629 | #if SECURITY_MAC_CHECK_ENFORCE |
1630 | /* 21167099 - only check if we allow write */ |
1631 | if (!mac_vnode_enforce) { |
1632 | return 0; |
1633 | } |
1634 | #endif |
1635 | cred = vfs_context_ucred(ctx); |
1636 | if (!mac_cred_check_enforce(cred)) { |
1637 | return 0; |
1638 | } |
1639 | VFS_KERNEL_DEBUG_START1(51, dvp); |
1640 | MAC_CHECK(vnode_check_lookup, cred, dvp, mac_vnode_label(dvp), cnp); |
1641 | VFS_KERNEL_DEBUG_END1(51, dvp); |
1642 | return error; |
1643 | } |
1644 | |
1645 | int |
1646 | mac_vnode_check_open(vfs_context_t ctx, struct vnode *vp, int acc_mode) |
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 | } |
1656 | #endif |
1657 | cred = vfs_context_ucred(ctx); |
1658 | if (!mac_cred_check_enforce(cred)) { |
1659 | return 0; |
1660 | } |
1661 | VFS_KERNEL_DEBUG_START1(52, vp); |
1662 | MAC_CHECK(vnode_check_open, cred, vp, mac_vnode_label(vp), acc_mode); |
1663 | VFS_KERNEL_DEBUG_END1(52, vp); |
1664 | return error; |
1665 | } |
1666 | |
1667 | int |
1668 | mac_vnode_check_read(vfs_context_t ctx, struct ucred *file_cred, |
1669 | struct vnode *vp) |
1670 | { |
1671 | kauth_cred_t cred; |
1672 | int error; |
1673 | |
1674 | #if SECURITY_MAC_CHECK_ENFORCE |
1675 | /* 21167099 - only check if we allow write */ |
1676 | if (!mac_vnode_enforce) { |
1677 | return 0; |
1678 | } |
1679 | #endif |
1680 | cred = vfs_context_ucred(ctx); |
1681 | if (!mac_cred_check_enforce(cred)) { |
1682 | return 0; |
1683 | } |
1684 | VFS_KERNEL_DEBUG_START1(53, vp); |
1685 | MAC_CHECK(vnode_check_read, cred, file_cred, vp, |
1686 | mac_vnode_label(vp)); |
1687 | VFS_KERNEL_DEBUG_END1(53, vp); |
1688 | |
1689 | return error; |
1690 | } |
1691 | |
1692 | int |
1693 | mac_vnode_check_readdir(vfs_context_t ctx, struct vnode *dvp) |
1694 | { |
1695 | kauth_cred_t cred; |
1696 | int error; |
1697 | |
1698 | #if SECURITY_MAC_CHECK_ENFORCE |
1699 | /* 21167099 - only check if we allow write */ |
1700 | if (!mac_vnode_enforce) { |
1701 | return 0; |
1702 | } |
1703 | #endif |
1704 | cred = vfs_context_ucred(ctx); |
1705 | if (!mac_cred_check_enforce(cred)) { |
1706 | return 0; |
1707 | } |
1708 | VFS_KERNEL_DEBUG_START1(54, dvp); |
1709 | MAC_CHECK(vnode_check_readdir, cred, dvp, mac_vnode_label(dvp)); |
1710 | VFS_KERNEL_DEBUG_END1(54, dvp); |
1711 | return error; |
1712 | } |
1713 | |
1714 | int |
1715 | mac_vnode_check_readlink(vfs_context_t ctx, struct vnode *vp) |
1716 | { |
1717 | kauth_cred_t cred; |
1718 | int error; |
1719 | |
1720 | #if SECURITY_MAC_CHECK_ENFORCE |
1721 | /* 21167099 - only check if we allow write */ |
1722 | if (!mac_vnode_enforce) { |
1723 | return 0; |
1724 | } |
1725 | #endif |
1726 | cred = vfs_context_ucred(ctx); |
1727 | if (!mac_cred_check_enforce(cred)) { |
1728 | return 0; |
1729 | } |
1730 | VFS_KERNEL_DEBUG_START1(55, vp); |
1731 | MAC_CHECK(vnode_check_readlink, cred, vp, mac_vnode_label(vp)); |
1732 | VFS_KERNEL_DEBUG_END1(55, vp); |
1733 | return error; |
1734 | } |
1735 | |
1736 | int |
1737 | mac_vnode_check_label_update(vfs_context_t ctx, struct vnode *vp, |
1738 | struct label *newlabel) |
1739 | { |
1740 | kauth_cred_t cred; |
1741 | int error; |
1742 | |
1743 | #if SECURITY_MAC_CHECK_ENFORCE |
1744 | /* 21167099 - only check if we allow write */ |
1745 | if (!mac_vnode_enforce) { |
1746 | return 0; |
1747 | } |
1748 | #endif |
1749 | cred = vfs_context_ucred(ctx); |
1750 | if (!mac_cred_check_enforce(cred)) { |
1751 | return 0; |
1752 | } |
1753 | VFS_KERNEL_DEBUG_START1(56, vp); |
1754 | MAC_CHECK(vnode_check_label_update, cred, vp, mac_vnode_label(vp), newlabel); |
1755 | VFS_KERNEL_DEBUG_END1(56, vp); |
1756 | |
1757 | return error; |
1758 | } |
1759 | |
1760 | int |
1761 | mac_vnode_check_rename(vfs_context_t ctx, struct vnode *dvp, |
1762 | struct vnode *vp, struct componentname *cnp, struct vnode *tdvp, |
1763 | struct vnode *tvp, struct componentname *tcnp) |
1764 | { |
1765 | kauth_cred_t cred; |
1766 | int error; |
1767 | |
1768 | #if SECURITY_MAC_CHECK_ENFORCE |
1769 | /* 21167099 - only check if we allow write */ |
1770 | if (!mac_vnode_enforce) { |
1771 | return 0; |
1772 | } |
1773 | #endif |
1774 | cred = vfs_context_ucred(ctx); |
1775 | if (!mac_cred_check_enforce(cred)) { |
1776 | return 0; |
1777 | } |
1778 | |
1779 | VFS_KERNEL_DEBUG_START1(57, vp); |
1780 | MAC_CHECK(vnode_check_rename_from, cred, dvp, mac_vnode_label(dvp), vp, |
1781 | mac_vnode_label(vp), cnp); |
1782 | if (error) { |
1783 | VFS_KERNEL_DEBUG_END1(57, vp); |
1784 | return error; |
1785 | } |
1786 | |
1787 | MAC_CHECK(vnode_check_rename_to, cred, tdvp, mac_vnode_label(tdvp), tvp, |
1788 | tvp != NULL ? mac_vnode_label(tvp) : NULL, dvp == tdvp, tcnp); |
1789 | if (error) { |
1790 | VFS_KERNEL_DEBUG_END1(57, vp); |
1791 | return error; |
1792 | } |
1793 | |
1794 | MAC_CHECK(vnode_check_rename, cred, dvp, mac_vnode_label(dvp), vp, |
1795 | mac_vnode_label(vp), cnp, tdvp, mac_vnode_label(tdvp), tvp, |
1796 | tvp != NULL ? mac_vnode_label(tvp) : NULL, tcnp); |
1797 | VFS_KERNEL_DEBUG_END1(57, vp); |
1798 | return error; |
1799 | } |
1800 | |
1801 | int |
1802 | mac_vnode_check_revoke(vfs_context_t ctx, struct vnode *vp) |
1803 | { |
1804 | kauth_cred_t cred; |
1805 | int error; |
1806 | |
1807 | #if SECURITY_MAC_CHECK_ENFORCE |
1808 | /* 21167099 - only check if we allow write */ |
1809 | if (!mac_vnode_enforce) { |
1810 | return 0; |
1811 | } |
1812 | #endif |
1813 | cred = vfs_context_ucred(ctx); |
1814 | if (!mac_cred_check_enforce(cred)) { |
1815 | return 0; |
1816 | } |
1817 | VFS_KERNEL_DEBUG_START1(58, vp); |
1818 | MAC_CHECK(vnode_check_revoke, cred, vp, mac_vnode_label(vp)); |
1819 | VFS_KERNEL_DEBUG_END1(58, vp); |
1820 | return error; |
1821 | } |
1822 | |
1823 | int |
1824 | mac_vnode_check_searchfs(vfs_context_t ctx, struct vnode *vp, struct attrlist *returnattrs, |
1825 | struct attrlist *searchattrs) |
1826 | { |
1827 | kauth_cred_t cred; |
1828 | int error; |
1829 | |
1830 | #if SECURITY_MAC_CHECK_ENFORCE |
1831 | /* 21167099 - only check if we allow write */ |
1832 | if (!mac_vnode_enforce) { |
1833 | return 0; |
1834 | } |
1835 | #endif |
1836 | cred = vfs_context_ucred(ctx); |
1837 | if (!mac_cred_check_enforce(cred)) { |
1838 | return 0; |
1839 | } |
1840 | VFS_KERNEL_DEBUG_START1(59, vp); |
1841 | MAC_CHECK(vnode_check_searchfs, cred, vp, mac_vnode_label(vp), returnattrs, searchattrs); |
1842 | VFS_KERNEL_DEBUG_END1(59, vp); |
1843 | return error; |
1844 | } |
1845 | |
1846 | int |
1847 | mac_vnode_check_select(vfs_context_t ctx, struct vnode *vp, int which) |
1848 | { |
1849 | kauth_cred_t cred; |
1850 | int error; |
1851 | |
1852 | #if SECURITY_MAC_CHECK_ENFORCE |
1853 | /* 21167099 - only check if we allow write */ |
1854 | if (!mac_vnode_enforce) { |
1855 | return 0; |
1856 | } |
1857 | #endif |
1858 | cred = vfs_context_ucred(ctx); |
1859 | if (!mac_cred_check_enforce(cred)) { |
1860 | return 0; |
1861 | } |
1862 | VFS_KERNEL_DEBUG_START1(60, vp); |
1863 | MAC_CHECK(vnode_check_select, cred, vp, mac_vnode_label(vp), which); |
1864 | VFS_KERNEL_DEBUG_END1(60, vp); |
1865 | return error; |
1866 | } |
1867 | |
1868 | int |
1869 | mac_vnode_check_setacl(vfs_context_t ctx, struct vnode *vp, |
1870 | struct kauth_acl *acl) |
1871 | { |
1872 | kauth_cred_t cred; |
1873 | int error; |
1874 | |
1875 | #if SECURITY_MAC_CHECK_ENFORCE |
1876 | /* 21167099 - only check if we allow write */ |
1877 | if (!mac_vnode_enforce) { |
1878 | return 0; |
1879 | } |
1880 | #endif |
1881 | cred = vfs_context_ucred(ctx); |
1882 | if (!mac_cred_check_enforce(cred)) { |
1883 | return 0; |
1884 | } |
1885 | VFS_KERNEL_DEBUG_START1(61, vp); |
1886 | MAC_CHECK(vnode_check_setacl, cred, vp, mac_vnode_label(vp), acl); |
1887 | VFS_KERNEL_DEBUG_END1(61, vp); |
1888 | return error; |
1889 | } |
1890 | |
1891 | int |
1892 | mac_vnode_check_setattrlist(vfs_context_t ctx, struct vnode *vp, |
1893 | struct attrlist *alist) |
1894 | { |
1895 | kauth_cred_t cred; |
1896 | int error; |
1897 | |
1898 | #if SECURITY_MAC_CHECK_ENFORCE |
1899 | /* 21167099 - only check if we allow write */ |
1900 | if (!mac_vnode_enforce) { |
1901 | return 0; |
1902 | } |
1903 | #endif |
1904 | cred = vfs_context_ucred(ctx); |
1905 | if (!mac_cred_check_enforce(cred)) { |
1906 | return 0; |
1907 | } |
1908 | VFS_KERNEL_DEBUG_START1(62, vp); |
1909 | MAC_CHECK(vnode_check_setattrlist, cred, vp, mac_vnode_label(vp), alist); |
1910 | VFS_KERNEL_DEBUG_END1(62, vp); |
1911 | return error; |
1912 | } |
1913 | |
1914 | int |
1915 | mac_vnode_check_setextattr(vfs_context_t ctx, struct vnode *vp, |
1916 | const char *name, struct uio *uio) |
1917 | { |
1918 | kauth_cred_t cred; |
1919 | int error; |
1920 | |
1921 | #if SECURITY_MAC_CHECK_ENFORCE |
1922 | /* 21167099 - only check if we allow write */ |
1923 | if (!mac_vnode_enforce) { |
1924 | return 0; |
1925 | } |
1926 | #endif |
1927 | cred = vfs_context_ucred(ctx); |
1928 | if (!mac_cred_check_enforce(cred)) { |
1929 | return 0; |
1930 | } |
1931 | VFS_KERNEL_DEBUG_START1(63, vp); |
1932 | MAC_CHECK(vnode_check_setextattr, cred, vp, mac_vnode_label(vp), |
1933 | name, uio); |
1934 | VFS_KERNEL_DEBUG_END1(63, vp); |
1935 | return error; |
1936 | } |
1937 | |
1938 | int |
1939 | mac_vnode_check_setflags(vfs_context_t ctx, struct vnode *vp, u_long flags) |
1940 | { |
1941 | kauth_cred_t cred; |
1942 | int error; |
1943 | |
1944 | #if SECURITY_MAC_CHECK_ENFORCE |
1945 | /* 21167099 - only check if we allow write */ |
1946 | if (!mac_vnode_enforce) { |
1947 | return 0; |
1948 | } |
1949 | #endif |
1950 | cred = vfs_context_ucred(ctx); |
1951 | if (!mac_cred_check_enforce(cred)) { |
1952 | return 0; |
1953 | } |
1954 | VFS_KERNEL_DEBUG_START1(64, vp); |
1955 | MAC_CHECK(vnode_check_setflags, cred, vp, mac_vnode_label(vp), flags); |
1956 | VFS_KERNEL_DEBUG_END1(64, vp); |
1957 | return error; |
1958 | } |
1959 | |
1960 | int |
1961 | mac_vnode_check_setmode(vfs_context_t ctx, struct vnode *vp, mode_t mode) |
1962 | { |
1963 | kauth_cred_t cred; |
1964 | int error; |
1965 | |
1966 | #if SECURITY_MAC_CHECK_ENFORCE |
1967 | /* 21167099 - only check if we allow write */ |
1968 | if (!mac_vnode_enforce) { |
1969 | return 0; |
1970 | } |
1971 | #endif |
1972 | cred = vfs_context_ucred(ctx); |
1973 | if (!mac_cred_check_enforce(cred)) { |
1974 | return 0; |
1975 | } |
1976 | VFS_KERNEL_DEBUG_START1(65, vp); |
1977 | MAC_CHECK(vnode_check_setmode, cred, vp, mac_vnode_label(vp), mode); |
1978 | VFS_KERNEL_DEBUG_END1(65, vp); |
1979 | return error; |
1980 | } |
1981 | |
1982 | int |
1983 | mac_vnode_check_setowner(vfs_context_t ctx, struct vnode *vp, uid_t uid, |
1984 | gid_t gid) |
1985 | { |
1986 | kauth_cred_t cred; |
1987 | int error; |
1988 | |
1989 | #if SECURITY_MAC_CHECK_ENFORCE |
1990 | /* 21167099 - only check if we allow write */ |
1991 | if (!mac_vnode_enforce) { |
1992 | return 0; |
1993 | } |
1994 | #endif |
1995 | cred = vfs_context_ucred(ctx); |
1996 | if (!mac_cred_check_enforce(cred)) { |
1997 | return 0; |
1998 | } |
1999 | VFS_KERNEL_DEBUG_START1(66, vp); |
2000 | MAC_CHECK(vnode_check_setowner, cred, vp, mac_vnode_label(vp), uid, gid); |
2001 | VFS_KERNEL_DEBUG_END1(66, vp); |
2002 | return error; |
2003 | } |
2004 | |
2005 | int |
2006 | mac_vnode_check_setutimes(vfs_context_t ctx, struct vnode *vp, |
2007 | struct timespec atime, struct timespec mtime) |
2008 | { |
2009 | kauth_cred_t cred; |
2010 | int error; |
2011 | |
2012 | #if SECURITY_MAC_CHECK_ENFORCE |
2013 | /* 21167099 - only check if we allow write */ |
2014 | if (!mac_vnode_enforce) { |
2015 | return 0; |
2016 | } |
2017 | #endif |
2018 | cred = vfs_context_ucred(ctx); |
2019 | if (!mac_cred_check_enforce(cred)) { |
2020 | return 0; |
2021 | } |
2022 | VFS_KERNEL_DEBUG_START1(67, vp); |
2023 | MAC_CHECK(vnode_check_setutimes, cred, vp, mac_vnode_label(vp), atime, |
2024 | mtime); |
2025 | VFS_KERNEL_DEBUG_END1(67, vp); |
2026 | return error; |
2027 | } |
2028 | |
2029 | int |
2030 | mac_vnode_check_stat(vfs_context_t ctx, struct ucred *file_cred, |
2031 | struct vnode *vp) |
2032 | { |
2033 | kauth_cred_t cred; |
2034 | int error; |
2035 | |
2036 | #if SECURITY_MAC_CHECK_ENFORCE |
2037 | /* 21167099 - only check if we allow write */ |
2038 | if (!mac_vnode_enforce) { |
2039 | return 0; |
2040 | } |
2041 | #endif |
2042 | cred = vfs_context_ucred(ctx); |
2043 | if (!mac_cred_check_enforce(cred)) { |
2044 | return 0; |
2045 | } |
2046 | VFS_KERNEL_DEBUG_START1(68, vp); |
2047 | MAC_CHECK(vnode_check_stat, cred, file_cred, vp, |
2048 | mac_vnode_label(vp)); |
2049 | VFS_KERNEL_DEBUG_END1(68, vp); |
2050 | return error; |
2051 | } |
2052 | |
2053 | int |
2054 | mac_vnode_check_trigger_resolve(vfs_context_t ctx, struct vnode *dvp, |
2055 | struct componentname *cnp) |
2056 | { |
2057 | kauth_cred_t cred; |
2058 | int error; |
2059 | |
2060 | #if SECURITY_MAC_CHECK_ENFORCE |
2061 | /* 21167099 - only check if we allow write */ |
2062 | if (!mac_vnode_enforce) { |
2063 | return 0; |
2064 | } |
2065 | #endif |
2066 | cred = vfs_context_ucred(ctx); |
2067 | if (!mac_cred_check_enforce(cred)) { |
2068 | return 0; |
2069 | } |
2070 | VFS_KERNEL_DEBUG_START1(69, dvp); |
2071 | MAC_CHECK(vnode_check_trigger_resolve, cred, dvp, mac_vnode_label(dvp), cnp); |
2072 | VFS_KERNEL_DEBUG_END1(69, dvp); |
2073 | return error; |
2074 | } |
2075 | |
2076 | int |
2077 | mac_vnode_check_truncate(vfs_context_t ctx, struct ucred *file_cred, |
2078 | struct vnode *vp) |
2079 | { |
2080 | kauth_cred_t cred; |
2081 | int error; |
2082 | |
2083 | #if SECURITY_MAC_CHECK_ENFORCE |
2084 | /* 21167099 - only check if we allow write */ |
2085 | if (!mac_vnode_enforce) { |
2086 | return 0; |
2087 | } |
2088 | #endif |
2089 | cred = vfs_context_ucred(ctx); |
2090 | if (!mac_cred_check_enforce(cred)) { |
2091 | return 0; |
2092 | } |
2093 | VFS_KERNEL_DEBUG_START1(70, vp); |
2094 | MAC_CHECK(vnode_check_truncate, cred, file_cred, vp, |
2095 | mac_vnode_label(vp)); |
2096 | VFS_KERNEL_DEBUG_END1(70, vp); |
2097 | |
2098 | return error; |
2099 | } |
2100 | |
2101 | int |
2102 | mac_vnode_check_write(vfs_context_t ctx, struct ucred *file_cred, |
2103 | struct vnode *vp) |
2104 | { |
2105 | kauth_cred_t cred; |
2106 | int error; |
2107 | |
2108 | #if SECURITY_MAC_CHECK_ENFORCE |
2109 | /* 21167099 - only check if we allow write */ |
2110 | if (!mac_vnode_enforce) { |
2111 | return 0; |
2112 | } |
2113 | #endif |
2114 | cred = vfs_context_ucred(ctx); |
2115 | if (!mac_cred_check_enforce(cred)) { |
2116 | return 0; |
2117 | } |
2118 | VFS_KERNEL_DEBUG_START1(71, vp); |
2119 | MAC_CHECK(vnode_check_write, cred, file_cred, vp, mac_vnode_label(vp)); |
2120 | VFS_KERNEL_DEBUG_END1(71, vp); |
2121 | |
2122 | return error; |
2123 | } |
2124 | |
2125 | int |
2126 | mac_vnode_check_uipc_bind(vfs_context_t ctx, struct vnode *dvp, |
2127 | struct componentname *cnp, struct vnode_attr *vap) |
2128 | { |
2129 | kauth_cred_t cred; |
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 | } |
2137 | #endif |
2138 | cred = vfs_context_ucred(ctx); |
2139 | if (!mac_cred_check_enforce(cred)) { |
2140 | return 0; |
2141 | } |
2142 | VFS_KERNEL_DEBUG_START1(72, dvp); |
2143 | MAC_CHECK(vnode_check_uipc_bind, cred, dvp, mac_vnode_label(dvp), cnp, vap); |
2144 | VFS_KERNEL_DEBUG_END1(72, dvp); |
2145 | return error; |
2146 | } |
2147 | |
2148 | int |
2149 | mac_vnode_check_uipc_connect(vfs_context_t ctx, struct vnode *vp, struct socket *so) |
2150 | { |
2151 | kauth_cred_t cred; |
2152 | int error; |
2153 | |
2154 | #if SECURITY_MAC_CHECK_ENFORCE |
2155 | /* 21167099 - only check if we allow write */ |
2156 | if (!mac_vnode_enforce) { |
2157 | return 0; |
2158 | } |
2159 | #endif |
2160 | cred = vfs_context_ucred(ctx); |
2161 | if (!mac_cred_check_enforce(cred)) { |
2162 | return 0; |
2163 | } |
2164 | VFS_KERNEL_DEBUG_START1(73, vp); |
2165 | MAC_CHECK(vnode_check_uipc_connect, cred, vp, mac_vnode_label(vp), (socket_t) so); |
2166 | VFS_KERNEL_DEBUG_END1(73, vp); |
2167 | return error; |
2168 | } |
2169 | |
2170 | void |
2171 | mac_vnode_label_update(vfs_context_t ctx, struct vnode *vp, struct label *newlabel) |
2172 | { |
2173 | kauth_cred_t cred = vfs_context_ucred(ctx); |
2174 | struct label *tmpl = NULL; |
2175 | |
2176 | if (mac_vnode_label(vp) == NULL) { |
2177 | tmpl = mac_vnode_label_alloc(vp); |
2178 | } |
2179 | |
2180 | vnode_lock(vp); |
2181 | |
2182 | /* |
2183 | * Recheck under lock. We allocate labels for vnodes lazily, so |
2184 | * somebody else might have already got here first. |
2185 | */ |
2186 | if (mac_vnode_label(vp) == NULL) { |
2187 | vp->v_label = tmpl; |
2188 | tmpl = NULL; |
2189 | } |
2190 | |
2191 | VFS_KERNEL_DEBUG_START1(74, vp); |
2192 | MAC_PERFORM(vnode_label_update, cred, vp, mac_vnode_label(vp), newlabel); |
2193 | VFS_KERNEL_DEBUG_END1(74, vp); |
2194 | vnode_unlock(vp); |
2195 | |
2196 | if (tmpl != NULL) { |
2197 | mac_vnode_label_free(label: tmpl); |
2198 | } |
2199 | } |
2200 | |
2201 | int |
2202 | mac_vnode_find_sigs(struct proc *p, struct vnode *vp, off_t offset) |
2203 | { |
2204 | int error; |
2205 | |
2206 | #if SECURITY_MAC_CHECK_ENFORCE |
2207 | /* 21167099 - only check if we allow write */ |
2208 | if (!mac_proc_enforce || !mac_vnode_enforce) { |
2209 | return 0; |
2210 | } |
2211 | #endif |
2212 | |
2213 | VFS_KERNEL_DEBUG_START1(75, vp); |
2214 | MAC_CHECK(vnode_find_sigs, p, vp, offset, mac_vnode_label(vp)); |
2215 | VFS_KERNEL_DEBUG_END1(75, vp); |
2216 | |
2217 | return error; |
2218 | } |
2219 | |
2220 | void |
2221 | mac_mount_label_associate(vfs_context_t ctx, struct mount *mp) |
2222 | { |
2223 | kauth_cred_t cred = vfs_context_ucred(ctx); |
2224 | |
2225 | /* XXX: eventually this logic may be handled by the policy? */ |
2226 | |
2227 | /* We desire MULTILABEL for the root filesystem. */ |
2228 | if ((mp->mnt_flag & MNT_ROOTFS) && |
2229 | (strcmp(s1: mp->mnt_vfsstat.f_fstypename, s2: "hfs" ) == 0)) { |
2230 | mp->mnt_flag |= MNT_MULTILABEL; |
2231 | } |
2232 | |
2233 | /* MULTILABEL on DEVFS. */ |
2234 | if (strcmp(s1: mp->mnt_vfsstat.f_fstypename, s2: "devfs" ) == 0) { |
2235 | mp->mnt_flag |= MNT_MULTILABEL; |
2236 | } |
2237 | |
2238 | /* MULTILABEL on FDESC pseudo-filesystem. */ |
2239 | if (strcmp(s1: mp->mnt_vfsstat.f_fstypename, s2: "fdesc" ) == 0) { |
2240 | mp->mnt_flag |= MNT_MULTILABEL; |
2241 | } |
2242 | |
2243 | /* MULTILABEL on all NFS filesystems. */ |
2244 | if (strcmp(s1: mp->mnt_vfsstat.f_fstypename, s2: "nfs" ) == 0) { |
2245 | mp->mnt_flag |= MNT_MULTILABEL; |
2246 | } |
2247 | |
2248 | /* MULTILABEL on all AFP filesystems. */ |
2249 | if (strcmp(s1: mp->mnt_vfsstat.f_fstypename, s2: "afpfs" ) == 0) { |
2250 | mp->mnt_flag |= MNT_MULTILABEL; |
2251 | } |
2252 | |
2253 | if (mp->mnt_vtable != NULL) { |
2254 | /* Any filesystem that supports native XATTRs. */ |
2255 | if ((mp->mnt_vtable->vfc_vfsflags & VFC_VFSNATIVEXATTR)) { |
2256 | mp->mnt_flag |= MNT_MULTILABEL; |
2257 | } |
2258 | |
2259 | /* Filesystem does not support multilabel. */ |
2260 | if ((mp->mnt_vtable->vfc_vfsflags & VFC_VFSNOMACLABEL) && |
2261 | (mp->mnt_flag & MNT_MULTILABEL)) { |
2262 | mp->mnt_flag &= ~MNT_MULTILABEL; |
2263 | } |
2264 | } |
2265 | |
2266 | VFS_KERNEL_DEBUG_START1(76, mp); |
2267 | MAC_PERFORM(mount_label_associate, cred, mp, mac_mount_label(mp)); |
2268 | VFS_KERNEL_DEBUG_END1(76, mp); |
2269 | #if DEBUG |
2270 | printf("MAC Framework enabling %s support: %s -> %s (%s)\n" , |
2271 | mp->mnt_flag & MNT_MULTILABEL ? "multilabel" : "singlelabel" , |
2272 | mp->mnt_vfsstat.f_mntfromname, |
2273 | mp->mnt_vfsstat.f_mntonname, |
2274 | mp->mnt_vfsstat.f_fstypename); |
2275 | #endif |
2276 | } |
2277 | |
2278 | int |
2279 | mac_mount_check_mount(vfs_context_t ctx, struct vnode *vp, |
2280 | struct componentname *cnp, const char *vfc_name) |
2281 | { |
2282 | kauth_cred_t cred; |
2283 | int error; |
2284 | |
2285 | #if SECURITY_MAC_CHECK_ENFORCE |
2286 | /* 21167099 - only check if we allow write */ |
2287 | if (!mac_vnode_enforce) { |
2288 | return 0; |
2289 | } |
2290 | #endif |
2291 | cred = vfs_context_ucred(ctx); |
2292 | if (!mac_cred_check_enforce(cred)) { |
2293 | return 0; |
2294 | } |
2295 | VFS_KERNEL_DEBUG_START1(77, vp); |
2296 | MAC_CHECK(mount_check_mount, cred, vp, mac_vnode_label(vp), cnp, vfc_name); |
2297 | VFS_KERNEL_DEBUG_END1(77, vp); |
2298 | |
2299 | return error; |
2300 | } |
2301 | |
2302 | int |
2303 | mac_mount_check_mount_late(vfs_context_t ctx, struct mount *mp) |
2304 | { |
2305 | kauth_cred_t cred; |
2306 | int error; |
2307 | |
2308 | #if SECURITY_MAC_CHECK_ENFORCE |
2309 | /* 21167099 - only check if we allow write */ |
2310 | if (!mac_vnode_enforce) { |
2311 | return 0; |
2312 | } |
2313 | #endif |
2314 | cred = vfs_context_ucred(ctx); |
2315 | if (!mac_cred_check_enforce(cred)) { |
2316 | return 0; |
2317 | } |
2318 | VFS_KERNEL_DEBUG_START1(78, mp); |
2319 | MAC_CHECK(mount_check_mount_late, cred, mp); |
2320 | VFS_KERNEL_DEBUG_END1(78, mp); |
2321 | |
2322 | return error; |
2323 | } |
2324 | |
2325 | int |
2326 | mac_mount_check_snapshot_create(vfs_context_t ctx, struct mount *mp, |
2327 | const char *name) |
2328 | { |
2329 | kauth_cred_t cred; |
2330 | int error; |
2331 | |
2332 | #if SECURITY_MAC_CHECK_ENFORCE |
2333 | /* 21167099 - only check if we allow write */ |
2334 | if (!mac_vnode_enforce) { |
2335 | return 0; |
2336 | } |
2337 | #endif |
2338 | cred = vfs_context_ucred(ctx); |
2339 | if (!mac_cred_check_enforce(cred)) { |
2340 | return 0; |
2341 | } |
2342 | VFS_KERNEL_DEBUG_START1(79, mp); |
2343 | MAC_CHECK(mount_check_snapshot_create, cred, mp, name); |
2344 | VFS_KERNEL_DEBUG_END1(79, mp); |
2345 | return error; |
2346 | } |
2347 | |
2348 | int |
2349 | mac_mount_check_snapshot_delete(vfs_context_t ctx, struct mount *mp, |
2350 | const char *name) |
2351 | { |
2352 | kauth_cred_t cred; |
2353 | int error; |
2354 | |
2355 | #if SECURITY_MAC_CHECK_ENFORCE |
2356 | /* 21167099 - only check if we allow write */ |
2357 | if (!mac_vnode_enforce) { |
2358 | return 0; |
2359 | } |
2360 | #endif |
2361 | cred = vfs_context_ucred(ctx); |
2362 | if (!mac_cred_check_enforce(cred)) { |
2363 | return 0; |
2364 | } |
2365 | VFS_KERNEL_DEBUG_START1(80, mp); |
2366 | MAC_CHECK(mount_check_snapshot_delete, cred, mp, name); |
2367 | VFS_KERNEL_DEBUG_END1(80, mp); |
2368 | return error; |
2369 | } |
2370 | |
2371 | int |
2372 | mac_mount_check_snapshot_mount(vfs_context_t ctx, struct vnode *rvp, struct vnode *vp, struct componentname *cnp, |
2373 | const char *name, const char *vfc_name) |
2374 | { |
2375 | kauth_cred_t cred; |
2376 | int error; |
2377 | |
2378 | #if SECURITY_MAC_CHECK_ENFORCE |
2379 | /* 21167099 - only check if we allow write */ |
2380 | if (!mac_vnode_enforce) { |
2381 | return 0; |
2382 | } |
2383 | #endif |
2384 | cred = vfs_context_ucred(ctx); |
2385 | if (!mac_cred_check_enforce(cred)) { |
2386 | return 0; |
2387 | } |
2388 | VFS_KERNEL_DEBUG_START1(92, vp); |
2389 | MAC_CHECK(mount_check_snapshot_mount, cred, rvp, vp, cnp, name, vfc_name); |
2390 | VFS_KERNEL_DEBUG_END1(92, vp); |
2391 | return error; |
2392 | } |
2393 | |
2394 | int |
2395 | mac_mount_check_snapshot_revert(vfs_context_t ctx, struct mount *mp, |
2396 | const char *name) |
2397 | { |
2398 | kauth_cred_t cred; |
2399 | int error; |
2400 | |
2401 | #if SECURITY_MAC_CHECK_ENFORCE |
2402 | /* 21167099 - only check if we allow write */ |
2403 | if (!mac_vnode_enforce) { |
2404 | return 0; |
2405 | } |
2406 | #endif |
2407 | cred = vfs_context_ucred(ctx); |
2408 | if (!mac_cred_check_enforce(cred)) { |
2409 | return 0; |
2410 | } |
2411 | VFS_KERNEL_DEBUG_START1(81, mp); |
2412 | MAC_CHECK(mount_check_snapshot_revert, cred, mp, name); |
2413 | VFS_KERNEL_DEBUG_END1(81, mp); |
2414 | return error; |
2415 | } |
2416 | |
2417 | int |
2418 | mac_mount_check_remount(vfs_context_t ctx, struct mount *mp) |
2419 | { |
2420 | kauth_cred_t cred; |
2421 | int error; |
2422 | |
2423 | #if SECURITY_MAC_CHECK_ENFORCE |
2424 | /* 21167099 - only check if we allow write */ |
2425 | if (!mac_vnode_enforce) { |
2426 | return 0; |
2427 | } |
2428 | #endif |
2429 | cred = vfs_context_ucred(ctx); |
2430 | if (!mac_cred_check_enforce(cred)) { |
2431 | return 0; |
2432 | } |
2433 | VFS_KERNEL_DEBUG_START1(82, mp); |
2434 | MAC_CHECK(mount_check_remount, cred, mp, mac_mount_label(mp)); |
2435 | VFS_KERNEL_DEBUG_END1(82, mp); |
2436 | |
2437 | return error; |
2438 | } |
2439 | |
2440 | int |
2441 | mac_mount_check_umount(vfs_context_t ctx, struct mount *mp) |
2442 | { |
2443 | kauth_cred_t cred; |
2444 | int error; |
2445 | |
2446 | #if SECURITY_MAC_CHECK_ENFORCE |
2447 | /* 21167099 - only check if we allow write */ |
2448 | if (!mac_vnode_enforce) { |
2449 | return 0; |
2450 | } |
2451 | #endif |
2452 | cred = vfs_context_ucred(ctx); |
2453 | if (!mac_cred_check_enforce(cred)) { |
2454 | return 0; |
2455 | } |
2456 | VFS_KERNEL_DEBUG_START1(83, mp); |
2457 | MAC_CHECK(mount_check_umount, cred, mp, mac_mount_label(mp)); |
2458 | VFS_KERNEL_DEBUG_END1(83, mp); |
2459 | |
2460 | return error; |
2461 | } |
2462 | |
2463 | int |
2464 | mac_mount_check_getattr(vfs_context_t ctx, struct mount *mp, |
2465 | struct vfs_attr *vfa) |
2466 | { |
2467 | kauth_cred_t cred; |
2468 | int error; |
2469 | |
2470 | #if SECURITY_MAC_CHECK_ENFORCE |
2471 | /* 21167099 - only check if we allow write */ |
2472 | if (!mac_vnode_enforce) { |
2473 | return 0; |
2474 | } |
2475 | #endif |
2476 | cred = vfs_context_ucred(ctx); |
2477 | if (!mac_cred_check_enforce(cred)) { |
2478 | return 0; |
2479 | } |
2480 | VFS_KERNEL_DEBUG_START1(84, mp); |
2481 | MAC_CHECK(mount_check_getattr, cred, mp, mac_mount_label(mp), vfa); |
2482 | VFS_KERNEL_DEBUG_END1(84, mp); |
2483 | return error; |
2484 | } |
2485 | |
2486 | int |
2487 | mac_mount_check_setattr(vfs_context_t ctx, struct mount *mp, |
2488 | struct vfs_attr *vfa) |
2489 | { |
2490 | kauth_cred_t cred; |
2491 | int error; |
2492 | |
2493 | #if SECURITY_MAC_CHECK_ENFORCE |
2494 | /* 21167099 - only check if we allow write */ |
2495 | if (!mac_vnode_enforce) { |
2496 | return 0; |
2497 | } |
2498 | #endif |
2499 | cred = vfs_context_ucred(ctx); |
2500 | if (!mac_cred_check_enforce(cred)) { |
2501 | return 0; |
2502 | } |
2503 | VFS_KERNEL_DEBUG_START1(85, mp); |
2504 | MAC_CHECK(mount_check_setattr, cred, mp, mac_mount_label(mp), vfa); |
2505 | VFS_KERNEL_DEBUG_END1(85, mp); |
2506 | return error; |
2507 | } |
2508 | |
2509 | int |
2510 | mac_mount_check_stat(vfs_context_t ctx, struct mount *mount) |
2511 | { |
2512 | kauth_cred_t cred; |
2513 | int error; |
2514 | |
2515 | #if SECURITY_MAC_CHECK_ENFORCE |
2516 | /* 21167099 - only check if we allow write */ |
2517 | if (!mac_vnode_enforce) { |
2518 | return 0; |
2519 | } |
2520 | #endif |
2521 | cred = vfs_context_ucred(ctx); |
2522 | if (!mac_cred_check_enforce(cred)) { |
2523 | return 0; |
2524 | } |
2525 | VFS_KERNEL_DEBUG_START1(86, mount); |
2526 | MAC_CHECK(mount_check_stat, cred, mount, mac_mount_label(mount)); |
2527 | VFS_KERNEL_DEBUG_END1(86, mount); |
2528 | |
2529 | return error; |
2530 | } |
2531 | |
2532 | int |
2533 | mac_mount_check_label_update(vfs_context_t ctx, struct mount *mount) |
2534 | { |
2535 | kauth_cred_t cred; |
2536 | int error; |
2537 | |
2538 | #if SECURITY_MAC_CHECK_ENFORCE |
2539 | /* 21167099 - only check if we allow write */ |
2540 | if (!mac_vnode_enforce) { |
2541 | return 0; |
2542 | } |
2543 | #endif |
2544 | cred = vfs_context_ucred(ctx); |
2545 | if (!mac_cred_check_enforce(cred)) { |
2546 | return 0; |
2547 | } |
2548 | VFS_KERNEL_DEBUG_START1(87, mount); |
2549 | MAC_CHECK(mount_check_label_update, cred, mount, mac_mount_label(mount)); |
2550 | VFS_KERNEL_DEBUG_END1(87, mount); |
2551 | |
2552 | return error; |
2553 | } |
2554 | |
2555 | int |
2556 | mac_mount_check_fsctl(vfs_context_t ctx, struct mount *mp, u_long cmd) |
2557 | { |
2558 | kauth_cred_t cred; |
2559 | int error; |
2560 | |
2561 | #if SECURITY_MAC_CHECK_ENFORCE |
2562 | /* 21167099 - only check if we allow write */ |
2563 | if (!mac_vnode_enforce) { |
2564 | return 0; |
2565 | } |
2566 | #endif |
2567 | cred = vfs_context_ucred(ctx); |
2568 | if (!mac_cred_check_enforce(cred)) { |
2569 | return 0; |
2570 | } |
2571 | VFS_KERNEL_DEBUG_START1(88, mp); |
2572 | MAC_CHECK(mount_check_fsctl, cred, mp, mac_mount_label(mp), cmd); |
2573 | VFS_KERNEL_DEBUG_END1(88, mp); |
2574 | |
2575 | return error; |
2576 | } |
2577 | |
2578 | void |
2579 | mac_devfs_label_associate_device(dev_t dev, struct devnode *de, |
2580 | const char *fullpath) |
2581 | { |
2582 | #if SECURITY_MAC_CHECK_ENFORCE |
2583 | /* 21167099 - only check if we allow write */ |
2584 | if (!mac_device_enforce) { |
2585 | return; |
2586 | } |
2587 | #endif |
2588 | |
2589 | VFS_KERNEL_DEBUG_START1(89, de); |
2590 | MAC_PERFORM(devfs_label_associate_device, dev, de, mac_devfs_label(de), |
2591 | fullpath); |
2592 | VFS_KERNEL_DEBUG_END1(89, de); |
2593 | } |
2594 | |
2595 | void |
2596 | mac_devfs_label_associate_directory(const char *dirname, int dirnamelen, |
2597 | struct devnode *de, const char *fullpath) |
2598 | { |
2599 | #if SECURITY_MAC_CHECK_ENFORCE |
2600 | /* 21167099 - only check if we allow write */ |
2601 | if (!mac_device_enforce) { |
2602 | return; |
2603 | } |
2604 | #endif |
2605 | |
2606 | VFS_KERNEL_DEBUG_START1(90, de); |
2607 | MAC_PERFORM(devfs_label_associate_directory, dirname, dirnamelen, de, |
2608 | mac_devfs_label(de), fullpath); |
2609 | VFS_KERNEL_DEBUG_END1(90, de); |
2610 | } |
2611 | |
2612 | int |
2613 | vn_setlabel(struct vnode *vp, struct label *intlabel, vfs_context_t context) |
2614 | { |
2615 | int error; |
2616 | |
2617 | #if SECURITY_MAC_CHECK_ENFORCE |
2618 | /* 21167099 - only check if we allow write */ |
2619 | if (!mac_vnode_enforce) { |
2620 | return 0; |
2621 | } |
2622 | #endif |
2623 | if (!mac_label_vnodes) { |
2624 | return 0; |
2625 | } |
2626 | |
2627 | if (vp->v_mount == NULL) { |
2628 | printf("vn_setlabel: null v_mount\n" ); |
2629 | if (vp->v_type != VNON) { |
2630 | printf("vn_setlabel: null v_mount with non-VNON\n" ); |
2631 | } |
2632 | return EBADF; |
2633 | } |
2634 | |
2635 | if ((vp->v_mount->mnt_flag & MNT_MULTILABEL) == 0) { |
2636 | return ENOTSUP; |
2637 | } |
2638 | |
2639 | /* |
2640 | * Multi-phase commit. First check the policies to confirm the |
2641 | * change is OK. Then commit via the filesystem. Finally, |
2642 | * update the actual vnode label. Question: maybe the filesystem |
2643 | * should update the vnode at the end as part of VNOP_SETLABEL()? |
2644 | */ |
2645 | error = mac_vnode_check_label_update(ctx: context, vp, newlabel: intlabel); |
2646 | if (error) { |
2647 | return error; |
2648 | } |
2649 | |
2650 | error = VNOP_SETLABEL(vp, intlabel, context); |
2651 | if (error == ENOTSUP) { |
2652 | error = mac_vnode_label_store(ctx: context, vp, |
2653 | intlabel); |
2654 | if (error) { |
2655 | printf("%s: mac_vnode_label_store failed %d\n" , |
2656 | __func__, error); |
2657 | return error; |
2658 | } |
2659 | mac_vnode_label_update(ctx: context, vp, newlabel: intlabel); |
2660 | } else if (error) { |
2661 | printf("vn_setlabel: vop setlabel failed %d\n" , error); |
2662 | return error; |
2663 | } |
2664 | |
2665 | return 0; |
2666 | } |
2667 | |
2668 | int |
2669 | mac_vnode_label_associate_fdesc(struct mount *mp, struct fdescnode *fnp, |
2670 | struct vnode *vp, vfs_context_t ctx) |
2671 | { |
2672 | struct fileproc *fp; |
2673 | #if CONFIG_MACF_SOCKET_SUBSET |
2674 | struct socket *so; |
2675 | #endif |
2676 | struct pipe *cpipe; |
2677 | struct vnode *fvp; |
2678 | struct proc *p; |
2679 | int error; |
2680 | |
2681 | error = 0; |
2682 | |
2683 | VFS_KERNEL_DEBUG_START1(91, vp); |
2684 | /* |
2685 | * If no backing file, let the policy choose which label to use. |
2686 | */ |
2687 | if (fnp->fd_fd == -1) { |
2688 | MAC_PERFORM(vnode_label_associate_file, vfs_context_ucred(ctx), |
2689 | mp, mac_mount_label(mp), NULL, NULL, vp, mac_vnode_label(vp)); |
2690 | VFS_KERNEL_DEBUG_END1(91, vp); |
2691 | return 0; |
2692 | } |
2693 | |
2694 | p = vfs_context_proc(ctx); |
2695 | error = fp_lookup(p, fd: fnp->fd_fd, resultfp: &fp, locked: 0); |
2696 | if (error) { |
2697 | VFS_KERNEL_DEBUG_END1(91, vp); |
2698 | return error; |
2699 | } |
2700 | |
2701 | if (fp->fp_glob == NULL) { |
2702 | error = EBADF; |
2703 | goto out; |
2704 | } |
2705 | |
2706 | switch (FILEGLOB_DTYPE(fp->fp_glob)) { |
2707 | case DTYPE_VNODE: |
2708 | fvp = (struct vnode *)fp_get_data(fp); |
2709 | if ((error = vnode_getwithref(vp: fvp))) { |
2710 | goto out; |
2711 | } |
2712 | if (mac_vnode_label(vp: fvp) != NULL) { |
2713 | if (mac_label_vnodes != 0 && mac_vnode_label(vp) == NULL) { |
2714 | mac_vnode_label_init(vp); /* init dst label */ |
2715 | } |
2716 | MAC_PERFORM(vnode_label_copy, mac_vnode_label(fvp), mac_vnode_label(vp)); |
2717 | } |
2718 | (void)vnode_put(vp: fvp); |
2719 | break; |
2720 | #if CONFIG_MACF_SOCKET_SUBSET |
2721 | case DTYPE_SOCKET: |
2722 | so = (struct socket *)fp_get_data(fp); |
2723 | socket_lock(so, refcount: 1); |
2724 | MAC_PERFORM(vnode_label_associate_socket, |
2725 | vfs_context_ucred(ctx), (socket_t)so, NULL, |
2726 | vp, mac_vnode_label(vp)); |
2727 | socket_unlock(so, refcount: 1); |
2728 | break; |
2729 | #endif |
2730 | case DTYPE_PSXSHM: |
2731 | pshm_label_associate(fp, vp, ctx); |
2732 | break; |
2733 | case DTYPE_PSXSEM: |
2734 | psem_label_associate(fp, vp, ctx); |
2735 | break; |
2736 | case DTYPE_PIPE: |
2737 | cpipe = (struct pipe *)fp_get_data(fp); |
2738 | /* kern/sys_pipe.c:pipe_select() suggests this test. */ |
2739 | if (cpipe == (struct pipe *)-1) { |
2740 | error = EINVAL; |
2741 | goto out; |
2742 | } |
2743 | PIPE_LOCK(cpipe); |
2744 | MAC_PERFORM(vnode_label_associate_pipe, vfs_context_ucred(ctx), |
2745 | cpipe, mac_pipe_label(cpipe), vp, mac_vnode_label(vp)); |
2746 | PIPE_UNLOCK(cpipe); |
2747 | break; |
2748 | case DTYPE_KQUEUE: |
2749 | case DTYPE_FSEVENTS: |
2750 | case DTYPE_ATALK: |
2751 | case DTYPE_NETPOLICY: |
2752 | case DTYPE_CHANNEL: |
2753 | case DTYPE_NEXUS: |
2754 | default: |
2755 | MAC_PERFORM(vnode_label_associate_file, vfs_context_ucred(ctx), |
2756 | mp, mac_mount_label(mp), fp->fp_glob, NULL, |
2757 | vp, mac_vnode_label(vp)); |
2758 | break; |
2759 | } |
2760 | out: |
2761 | VFS_KERNEL_DEBUG_END1(91, vp); |
2762 | fp_drop(p, fd: fnp->fd_fd, fp, locked: 0); |
2763 | return error; |
2764 | } |
2765 | |
2766 | intptr_t |
2767 | mac_vnode_label_get(struct vnode *vp, int slot, intptr_t sentinel) |
2768 | { |
2769 | struct label *l; |
2770 | |
2771 | KASSERT(vp != NULL, ("mac_vnode_label_get: NULL vnode" )); |
2772 | l = mac_vnode_label(vp); |
2773 | if (l != NULL) { |
2774 | return mac_label_get(l, slot); |
2775 | } else { |
2776 | return sentinel; |
2777 | } |
2778 | } |
2779 | |
2780 | void |
2781 | mac_vnode_label_set(struct vnode *vp, int slot, intptr_t v) |
2782 | { |
2783 | struct label *l; |
2784 | KASSERT(vp != NULL, ("mac_vnode_label_set: NULL vnode" )); |
2785 | l = mac_vnode_label(vp); |
2786 | if (l == NULL) { |
2787 | mac_vnode_label_init(vp); |
2788 | l = mac_vnode_label(vp); |
2789 | } |
2790 | mac_label_set(l, slot, v); |
2791 | } |
2792 | |
2793 | void |
2794 | mac_vnode_notify_reclaim(struct vnode *vp) |
2795 | { |
2796 | VFS_KERNEL_DEBUG_START1(94, vp); |
2797 | MAC_PERFORM(vnode_notify_reclaim, vp); |
2798 | VFS_KERNEL_DEBUG_END1(94, vp); |
2799 | } |
2800 | |
2801 | int |
2802 | mac_mount_check_quotactl(vfs_context_t ctx, struct mount *mp, int cmd, int id) |
2803 | { |
2804 | kauth_cred_t cred; |
2805 | int error; |
2806 | |
2807 | #if SECURITY_MAC_CHECK_ENFORCE |
2808 | /* 21167099 - only check if we allow write */ |
2809 | if (!mac_vnode_enforce) { |
2810 | return 0; |
2811 | } |
2812 | #endif |
2813 | cred = vfs_context_ucred(ctx); |
2814 | if (!mac_cred_check_enforce(cred)) { |
2815 | return 0; |
2816 | } |
2817 | VFS_KERNEL_DEBUG_START1(95, mp); |
2818 | MAC_CHECK(mount_check_quotactl, cred, mp, cmd, id); |
2819 | VFS_KERNEL_DEBUG_END1(95, mp); |
2820 | |
2821 | return error; |
2822 | } |
2823 | |
2824 | int |
2825 | mac_vnode_check_getattrlistbulk(vfs_context_t ctx, struct vnode *vp, struct attrlist *alist, uint64_t options) |
2826 | { |
2827 | kauth_cred_t cred; |
2828 | int error; |
2829 | |
2830 | #if SECURITY_MAC_CHECK_ENFORCE |
2831 | /* 21167099 - only check if we allow write */ |
2832 | if (!mac_vnode_enforce) { |
2833 | return 0; |
2834 | } |
2835 | #endif |
2836 | cred = vfs_context_ucred(ctx); |
2837 | if (!mac_cred_check_enforce(cred)) { |
2838 | return 0; |
2839 | } |
2840 | VFS_KERNEL_DEBUG_START1(96, mp); |
2841 | MAC_CHECK(vnode_check_getattrlistbulk, cred, vp, alist, options); |
2842 | VFS_KERNEL_DEBUG_END1(96, mp); |
2843 | |
2844 | return error; |
2845 | } |
2846 | |
2847 | int |
2848 | mac_vnode_check_copyfile(vfs_context_t ctx, struct vnode *dvp, |
2849 | struct vnode *tvp, struct vnode *fvp, struct componentname *cnp, |
2850 | mode_t mode, int flags) |
2851 | { |
2852 | kauth_cred_t cred; |
2853 | int error; |
2854 | |
2855 | #if SECURITY_MAC_CHECK_ENFORCE |
2856 | /* 21167099 - only check if we allow write */ |
2857 | if (!mac_vnode_enforce) { |
2858 | return 0; |
2859 | } |
2860 | #endif |
2861 | cred = vfs_context_ucred(ctx); |
2862 | if (!mac_cred_check_enforce(cred)) { |
2863 | return 0; |
2864 | } |
2865 | VFS_KERNEL_DEBUG_START1(97, dvp); |
2866 | MAC_CHECK(vnode_check_copyfile, cred, dvp, mac_vnode_label(dvp), |
2867 | tvp, tvp ? mac_vnode_label(tvp) : NULL, fvp, mac_vnode_label(fvp), cnp, mode, flags); |
2868 | VFS_KERNEL_DEBUG_END1(97, dvp); |
2869 | return error; |
2870 | } |
2871 | |
2872 | void |
2873 | mac_vnode_notify_unlink(vfs_context_t ctx, struct vnode *dvp, struct vnode *vp, |
2874 | struct componentname *cnp) |
2875 | { |
2876 | kauth_cred_t cred; |
2877 | |
2878 | #if SECURITY_MAC_CHECK_ENFORCE |
2879 | /* 21167099 - only check if we allow write */ |
2880 | if (!mac_vnode_enforce) { |
2881 | return; |
2882 | } |
2883 | #endif |
2884 | cred = vfs_context_ucred(ctx); |
2885 | if (!mac_cred_check_enforce(cred)) { |
2886 | return; |
2887 | } |
2888 | VFS_KERNEL_DEBUG_START1(98, vp); |
2889 | MAC_PERFORM(vnode_notify_unlink, cred, dvp, mac_vnode_label(dvp), vp, |
2890 | mac_vnode_label(vp), cnp); |
2891 | VFS_KERNEL_DEBUG_END1(98, vp); |
2892 | } |
2893 | |