1 /*-
2 * Copyright (c) 1999-2002, 2007-2009 Robert N. M. Watson
3 * Copyright (c) 2001-2005 Networks Associates Technology, Inc.
4 * Copyright (c) 2006 SPARTA, Inc.
5 * All rights reserved.
6 *
7 * This software was developed by Robert Watson for the TrustedBSD Project.
8 *
9 * This software was developed for the FreeBSD Project in part by NAI Labs,
10 * the Security Research Division of Network Associates, Inc. under
11 * DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA
12 * CHATS research program.
13 *
14 * This software was enhanced by SPARTA ISSO under SPAWAR contract
15 * N66001-04-C-6019 ("SEFOS").
16 *
17 * Redistribution and use in source and binary forms, with or without
18 * modification, are permitted provided that the following conditions
19 * are met:
20 * 1. Redistributions of source code must retain the above copyright
21 * notice, this list of conditions and the following disclaimer.
22 * 2. Redistributions in binary form must reproduce the above copyright
23 * notice, this list of conditions and the following disclaimer in the
24 * documentation and/or other materials provided with the distribution.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 *
38 * $FreeBSD$
39 */
40
41 /*
42 * Developed by the TrustedBSD Project.
43 *
44 * Low-watermark floating label mandatory integrity policy.
45 */
46
47 #include <sys/types.h>
48 #include <sys/param.h>
49 #include <sys/acl.h>
50 #include <sys/conf.h>
51 #include <sys/extattr.h>
52 #include <sys/kernel.h>
53 #include <sys/malloc.h>
54 #include <sys/mman.h>
55 #include <sys/mount.h>
56 #include <sys/priv.h>
57 #include <sys/proc.h>
58 #include <sys/sbuf.h>
59 #include <sys/systm.h>
60 #include <sys/sysproto.h>
61 #include <sys/sysent.h>
62 #include <sys/systm.h>
63 #include <sys/vnode.h>
64 #include <sys/file.h>
65 #include <sys/socket.h>
66 #include <sys/socketvar.h>
67 #include <sys/sx.h>
68 #include <sys/pipe.h>
69 #include <sys/sysctl.h>
70 #include <sys/syslog.h>
71
72 #include <fs/devfs/devfs.h>
73
74 #include <net/bpfdesc.h>
75 #include <net/if.h>
76 #include <net/if_types.h>
77 #include <net/if_var.h>
78
79 #include <netinet/in.h>
80 #include <netinet/in_pcb.h>
81 #include <netinet/ip_var.h>
82
83 #include <vm/vm.h>
84
85 #include <security/mac/mac_policy.h>
86 #include <security/mac/mac_framework.h>
87 #include <security/mac_lomac/mac_lomac.h>
88
89 struct mac_lomac_proc {
90 struct mac_lomac mac_lomac;
91 struct mtx mtx;
92 };
93
94 SYSCTL_DECL(_security_mac);
95
96 static SYSCTL_NODE(_security_mac, OID_AUTO, lomac,
97 CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
98 "TrustedBSD mac_lomac policy controls");
99
100 static int lomac_label_size = sizeof(struct mac_lomac);
101 SYSCTL_INT(_security_mac_lomac, OID_AUTO, label_size, CTLFLAG_RD,
102 &lomac_label_size, 0, "Size of struct mac_lomac");
103
104 static int lomac_enabled = 1;
105 SYSCTL_INT(_security_mac_lomac, OID_AUTO, enabled, CTLFLAG_RWTUN,
106 &lomac_enabled, 0, "Enforce MAC/LOMAC policy");
107
108 static int destroyed_not_inited;
109 SYSCTL_INT(_security_mac_lomac, OID_AUTO, destroyed_not_inited, CTLFLAG_RD,
110 &destroyed_not_inited, 0, "Count of labels destroyed but not inited");
111
112 static int trust_all_interfaces = 0;
113 SYSCTL_INT(_security_mac_lomac, OID_AUTO, trust_all_interfaces, CTLFLAG_RDTUN,
114 &trust_all_interfaces, 0, "Consider all interfaces 'trusted' by MAC/LOMAC");
115
116 static char trusted_interfaces[128];
117 SYSCTL_STRING(_security_mac_lomac, OID_AUTO, trusted_interfaces, CTLFLAG_RDTUN,
118 trusted_interfaces, 0, "Interfaces considered 'trusted' by MAC/LOMAC");
119
120 static int ptys_equal = 0;
121 SYSCTL_INT(_security_mac_lomac, OID_AUTO, ptys_equal, CTLFLAG_RWTUN,
122 &ptys_equal, 0, "Label pty devices as lomac/equal on create");
123
124 static int revocation_enabled = 1;
125 SYSCTL_INT(_security_mac_lomac, OID_AUTO, revocation_enabled, CTLFLAG_RWTUN,
126 &revocation_enabled, 0, "Revoke access to objects on relabel");
127
128 static int lomac_slot;
129 #define SLOT(l) ((struct mac_lomac *)mac_label_get((l), lomac_slot))
130 #define SLOT_SET(l, val) mac_label_set((l), lomac_slot, (uintptr_t)(val))
131 #define PSLOT(l) ((struct mac_lomac_proc *) \
132 mac_label_get((l), lomac_slot))
133 #define PSLOT_SET(l, val) mac_label_set((l), lomac_slot, (uintptr_t)(val))
134
135 static MALLOC_DEFINE(M_LOMAC, "mac_lomac_label", "MAC/LOMAC labels");
136
137 static struct mac_lomac *
138 lomac_alloc(int flag)
139 {
140 struct mac_lomac *ml;
141
142 ml = malloc(sizeof(*ml), M_LOMAC, M_ZERO | flag);
143
144 return (ml);
145 }
146
147 static void
148 lomac_free(struct mac_lomac *ml)
149 {
150
151 if (ml != NULL)
152 free(ml, M_LOMAC);
153 else
154 atomic_add_int(&destroyed_not_inited, 1);
155 }
156
157 static int
158 lomac_atmostflags(struct mac_lomac *ml, int flags)
159 {
160
161 if ((ml->ml_flags & flags) != ml->ml_flags)
162 return (EINVAL);
163 return (0);
164 }
165
166 static int
167 lomac_dominate_element(struct mac_lomac_element *a,
168 struct mac_lomac_element *b)
169 {
170
171 switch (a->mle_type) {
172 case MAC_LOMAC_TYPE_EQUAL:
173 case MAC_LOMAC_TYPE_HIGH:
174 return (1);
175
176 case MAC_LOMAC_TYPE_LOW:
177 switch (b->mle_type) {
178 case MAC_LOMAC_TYPE_GRADE:
179 case MAC_LOMAC_TYPE_HIGH:
180 return (0);
181
182 case MAC_LOMAC_TYPE_EQUAL:
183 case MAC_LOMAC_TYPE_LOW:
184 return (1);
185
186 default:
187 panic("lomac_dominate_element: b->mle_type invalid");
188 }
189
190 case MAC_LOMAC_TYPE_GRADE:
191 switch (b->mle_type) {
192 case MAC_LOMAC_TYPE_EQUAL:
193 case MAC_LOMAC_TYPE_LOW:
194 return (1);
195
196 case MAC_LOMAC_TYPE_HIGH:
197 return (0);
198
199 case MAC_LOMAC_TYPE_GRADE:
200 return (a->mle_grade >= b->mle_grade);
201
202 default:
203 panic("lomac_dominate_element: b->mle_type invalid");
204 }
205
206 default:
207 panic("lomac_dominate_element: a->mle_type invalid");
208 }
209 }
210
211 static int
212 lomac_range_in_range(struct mac_lomac *rangea, struct mac_lomac *rangeb)
213 {
214
215 return (lomac_dominate_element(&rangeb->ml_rangehigh,
216 &rangea->ml_rangehigh) &&
217 lomac_dominate_element(&rangea->ml_rangelow,
218 &rangeb->ml_rangelow));
219 }
220
221 static int
222 lomac_single_in_range(struct mac_lomac *single, struct mac_lomac *range)
223 {
224
225 KASSERT((single->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
226 ("lomac_single_in_range: a not single"));
227 KASSERT((range->ml_flags & MAC_LOMAC_FLAG_RANGE) != 0,
228 ("lomac_single_in_range: b not range"));
229
230 return (lomac_dominate_element(&range->ml_rangehigh,
231 &single->ml_single) && lomac_dominate_element(&single->ml_single,
232 &range->ml_rangelow));
233 }
234
235 static int
236 lomac_auxsingle_in_range(struct mac_lomac *single, struct mac_lomac *range)
237 {
238
239 KASSERT((single->ml_flags & MAC_LOMAC_FLAG_AUX) != 0,
240 ("lomac_single_in_range: a not auxsingle"));
241 KASSERT((range->ml_flags & MAC_LOMAC_FLAG_RANGE) != 0,
242 ("lomac_single_in_range: b not range"));
243
244 return (lomac_dominate_element(&range->ml_rangehigh,
245 &single->ml_auxsingle) &&
246 lomac_dominate_element(&single->ml_auxsingle,
247 &range->ml_rangelow));
248 }
249
250 static int
251 lomac_dominate_single(struct mac_lomac *a, struct mac_lomac *b)
252 {
253 KASSERT((a->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
254 ("lomac_dominate_single: a not single"));
255 KASSERT((b->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
256 ("lomac_dominate_single: b not single"));
257
258 return (lomac_dominate_element(&a->ml_single, &b->ml_single));
259 }
260
261 static int
262 lomac_subject_dominate(struct mac_lomac *a, struct mac_lomac *b)
263 {
264 KASSERT((~a->ml_flags &
265 (MAC_LOMAC_FLAG_SINGLE | MAC_LOMAC_FLAG_RANGE)) == 0,
266 ("lomac_dominate_single: a not subject"));
267 KASSERT((b->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
268 ("lomac_dominate_single: b not single"));
269
270 return (lomac_dominate_element(&a->ml_rangehigh, &b->ml_single));
271 }
272
273 static int
274 lomac_equal_element(struct mac_lomac_element *a, struct mac_lomac_element *b)
275 {
276
277 if (a->mle_type == MAC_LOMAC_TYPE_EQUAL ||
278 b->mle_type == MAC_LOMAC_TYPE_EQUAL)
279 return (1);
280
281 return (a->mle_type == b->mle_type && a->mle_grade == b->mle_grade);
282 }
283
284 static int
285 lomac_equal_single(struct mac_lomac *a, struct mac_lomac *b)
286 {
287
288 KASSERT((a->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
289 ("lomac_equal_single: a not single"));
290 KASSERT((b->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
291 ("lomac_equal_single: b not single"));
292
293 return (lomac_equal_element(&a->ml_single, &b->ml_single));
294 }
295
296 static int
297 lomac_contains_equal(struct mac_lomac *ml)
298 {
299
300 if (ml->ml_flags & MAC_LOMAC_FLAG_SINGLE)
301 if (ml->ml_single.mle_type == MAC_LOMAC_TYPE_EQUAL)
302 return (1);
303 if (ml->ml_flags & MAC_LOMAC_FLAG_AUX)
304 if (ml->ml_auxsingle.mle_type == MAC_LOMAC_TYPE_EQUAL)
305 return (1);
306
307 if (ml->ml_flags & MAC_LOMAC_FLAG_RANGE) {
308 if (ml->ml_rangelow.mle_type == MAC_LOMAC_TYPE_EQUAL)
309 return (1);
310 if (ml->ml_rangehigh.mle_type == MAC_LOMAC_TYPE_EQUAL)
311 return (1);
312 }
313
314 return (0);
315 }
316
317 static int
318 lomac_subject_privileged(struct mac_lomac *ml)
319 {
320
321 KASSERT((ml->ml_flags & MAC_LOMAC_FLAGS_BOTH) ==
322 MAC_LOMAC_FLAGS_BOTH,
323 ("lomac_subject_privileged: subject doesn't have both labels"));
324
325 /* If the single is EQUAL, it's ok. */
326 if (ml->ml_single.mle_type == MAC_LOMAC_TYPE_EQUAL)
327 return (0);
328
329 /* If either range endpoint is EQUAL, it's ok. */
330 if (ml->ml_rangelow.mle_type == MAC_LOMAC_TYPE_EQUAL ||
331 ml->ml_rangehigh.mle_type == MAC_LOMAC_TYPE_EQUAL)
332 return (0);
333
334 /* If the range is low-high, it's ok. */
335 if (ml->ml_rangelow.mle_type == MAC_LOMAC_TYPE_LOW &&
336 ml->ml_rangehigh.mle_type == MAC_LOMAC_TYPE_HIGH)
337 return (0);
338
339 /* It's not ok. */
340 return (EPERM);
341 }
342
343 static int
344 lomac_high_single(struct mac_lomac *ml)
345 {
346
347 KASSERT((ml->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
348 ("lomac_high_single: mac_lomac not single"));
349
350 return (ml->ml_single.mle_type == MAC_LOMAC_TYPE_HIGH);
351 }
352
353 static int
354 lomac_valid(struct mac_lomac *ml)
355 {
356
357 if (ml->ml_flags & MAC_LOMAC_FLAG_SINGLE) {
358 switch (ml->ml_single.mle_type) {
359 case MAC_LOMAC_TYPE_GRADE:
360 case MAC_LOMAC_TYPE_EQUAL:
361 case MAC_LOMAC_TYPE_HIGH:
362 case MAC_LOMAC_TYPE_LOW:
363 break;
364
365 default:
366 return (EINVAL);
367 }
368 } else {
369 if (ml->ml_single.mle_type != MAC_LOMAC_TYPE_UNDEF)
370 return (EINVAL);
371 }
372
373 if (ml->ml_flags & MAC_LOMAC_FLAG_AUX) {
374 switch (ml->ml_auxsingle.mle_type) {
375 case MAC_LOMAC_TYPE_GRADE:
376 case MAC_LOMAC_TYPE_EQUAL:
377 case MAC_LOMAC_TYPE_HIGH:
378 case MAC_LOMAC_TYPE_LOW:
379 break;
380
381 default:
382 return (EINVAL);
383 }
384 } else {
385 if (ml->ml_auxsingle.mle_type != MAC_LOMAC_TYPE_UNDEF)
386 return (EINVAL);
387 }
388
389 if (ml->ml_flags & MAC_LOMAC_FLAG_RANGE) {
390 switch (ml->ml_rangelow.mle_type) {
391 case MAC_LOMAC_TYPE_GRADE:
392 case MAC_LOMAC_TYPE_EQUAL:
393 case MAC_LOMAC_TYPE_HIGH:
394 case MAC_LOMAC_TYPE_LOW:
395 break;
396
397 default:
398 return (EINVAL);
399 }
400
401 switch (ml->ml_rangehigh.mle_type) {
402 case MAC_LOMAC_TYPE_GRADE:
403 case MAC_LOMAC_TYPE_EQUAL:
404 case MAC_LOMAC_TYPE_HIGH:
405 case MAC_LOMAC_TYPE_LOW:
406 break;
407
408 default:
409 return (EINVAL);
410 }
411 if (!lomac_dominate_element(&ml->ml_rangehigh,
412 &ml->ml_rangelow))
413 return (EINVAL);
414 } else {
415 if (ml->ml_rangelow.mle_type != MAC_LOMAC_TYPE_UNDEF ||
416 ml->ml_rangehigh.mle_type != MAC_LOMAC_TYPE_UNDEF)
417 return (EINVAL);
418 }
419
420 return (0);
421 }
422
423 static void
424 lomac_set_range(struct mac_lomac *ml, u_short typelow, u_short gradelow,
425 u_short typehigh, u_short gradehigh)
426 {
427
428 ml->ml_rangelow.mle_type = typelow;
429 ml->ml_rangelow.mle_grade = gradelow;
430 ml->ml_rangehigh.mle_type = typehigh;
431 ml->ml_rangehigh.mle_grade = gradehigh;
432 ml->ml_flags |= MAC_LOMAC_FLAG_RANGE;
433 }
434
435 static void
436 lomac_set_single(struct mac_lomac *ml, u_short type, u_short grade)
437 {
438
439 ml->ml_single.mle_type = type;
440 ml->ml_single.mle_grade = grade;
441 ml->ml_flags |= MAC_LOMAC_FLAG_SINGLE;
442 }
443
444 static void
445 lomac_copy_range(struct mac_lomac *labelfrom, struct mac_lomac *labelto)
446 {
447
448 KASSERT((labelfrom->ml_flags & MAC_LOMAC_FLAG_RANGE) != 0,
449 ("lomac_copy_range: labelfrom not range"));
450
451 labelto->ml_rangelow = labelfrom->ml_rangelow;
452 labelto->ml_rangehigh = labelfrom->ml_rangehigh;
453 labelto->ml_flags |= MAC_LOMAC_FLAG_RANGE;
454 }
455
456 static void
457 lomac_copy_single(struct mac_lomac *labelfrom, struct mac_lomac *labelto)
458 {
459
460 KASSERT((labelfrom->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
461 ("lomac_copy_single: labelfrom not single"));
462
463 labelto->ml_single = labelfrom->ml_single;
464 labelto->ml_flags |= MAC_LOMAC_FLAG_SINGLE;
465 }
466
467 static void
468 lomac_copy_auxsingle(struct mac_lomac *labelfrom, struct mac_lomac *labelto)
469 {
470
471 KASSERT((labelfrom->ml_flags & MAC_LOMAC_FLAG_AUX) != 0,
472 ("lomac_copy_auxsingle: labelfrom not auxsingle"));
473
474 labelto->ml_auxsingle = labelfrom->ml_auxsingle;
475 labelto->ml_flags |= MAC_LOMAC_FLAG_AUX;
476 }
477
478 static void
479 lomac_copy(struct mac_lomac *source, struct mac_lomac *dest)
480 {
481
482 if (source->ml_flags & MAC_LOMAC_FLAG_SINGLE)
483 lomac_copy_single(source, dest);
484 if (source->ml_flags & MAC_LOMAC_FLAG_AUX)
485 lomac_copy_auxsingle(source, dest);
486 if (source->ml_flags & MAC_LOMAC_FLAG_RANGE)
487 lomac_copy_range(source, dest);
488 }
489
490 static int lomac_to_string(struct sbuf *sb, struct mac_lomac *ml);
491
492 static int
493 maybe_demote(struct mac_lomac *subjlabel, struct mac_lomac *objlabel,
494 const char *actionname, const char *objname, struct vnode *vp)
495 {
496 struct sbuf subjlabel_sb, subjtext_sb, objlabel_sb;
497 char *subjlabeltext, *objlabeltext, *subjtext;
498 struct mac_lomac cached_subjlabel;
499 struct mac_lomac_proc *subj;
500 struct vattr va;
501 struct proc *p;
502 pid_t pgid;
503
504 subj = PSLOT(curthread->td_proc->p_label);
505
506 p = curthread->td_proc;
507 mtx_lock(&subj->mtx);
508 if (subj->mac_lomac.ml_flags & MAC_LOMAC_FLAG_UPDATE) {
509 /*
510 * Check to see if the pending demotion would be more or less
511 * severe than this one, and keep the more severe. This can
512 * only happen for a multi-threaded application.
513 */
514 if (lomac_dominate_single(objlabel, &subj->mac_lomac)) {
515 mtx_unlock(&subj->mtx);
516 return (0);
517 }
518 }
519 bzero(&subj->mac_lomac, sizeof(subj->mac_lomac));
520 /*
521 * Always demote the single label.
522 */
523 lomac_copy_single(objlabel, &subj->mac_lomac);
524 /*
525 * Start with the original range, then minimize each side of the
526 * range to the point of not dominating the object. The high side
527 * will always be demoted, of course.
528 */
529 lomac_copy_range(subjlabel, &subj->mac_lomac);
530 if (!lomac_dominate_element(&objlabel->ml_single,
531 &subj->mac_lomac.ml_rangelow))
532 subj->mac_lomac.ml_rangelow = objlabel->ml_single;
533 subj->mac_lomac.ml_rangehigh = objlabel->ml_single;
534 subj->mac_lomac.ml_flags |= MAC_LOMAC_FLAG_UPDATE;
535 ast_sched(curthread, TDA_MAC);
536
537 /*
538 * Avoid memory allocation while holding a mutex; cache the label.
539 */
540 lomac_copy_single(&subj->mac_lomac, &cached_subjlabel);
541 mtx_unlock(&subj->mtx);
542
543 sbuf_new(&subjlabel_sb, NULL, 0, SBUF_AUTOEXTEND);
544 lomac_to_string(&subjlabel_sb, subjlabel);
545 sbuf_finish(&subjlabel_sb);
546 subjlabeltext = sbuf_data(&subjlabel_sb);
547
548 sbuf_new(&subjtext_sb, NULL, 0, SBUF_AUTOEXTEND);
549 lomac_to_string(&subjtext_sb, &subj->mac_lomac);
550 sbuf_finish(&subjtext_sb);
551 subjtext = sbuf_data(&subjtext_sb);
552
553 sbuf_new(&objlabel_sb, NULL, 0, SBUF_AUTOEXTEND);
554 lomac_to_string(&objlabel_sb, objlabel);
555 sbuf_finish(&objlabel_sb);
556 objlabeltext = sbuf_data(&objlabel_sb);
557
558 pgid = p->p_pgrp->pg_id; /* XXX could be stale? */
559 if (vp != NULL && VOP_GETATTR(vp, &va, curthread->td_ucred) == 0) {
560 log(LOG_INFO, "LOMAC: level-%s subject p%dg%du%d:%s demoted to"
561 " level %s after %s a level-%s %s (inode=%ju, "
562 "mountpount=%s)\n",
563 subjlabeltext, p->p_pid, pgid, curthread->td_ucred->cr_uid,
564 p->p_comm, subjtext, actionname, objlabeltext, objname,
565 (uintmax_t)va.va_fileid, vp->v_mount->mnt_stat.f_mntonname);
566 } else {
567 log(LOG_INFO, "LOMAC: level-%s subject p%dg%du%d:%s demoted to"
568 " level %s after %s a level-%s %s\n",
569 subjlabeltext, p->p_pid, pgid, curthread->td_ucred->cr_uid,
570 p->p_comm, subjtext, actionname, objlabeltext, objname);
571 }
572
573 sbuf_delete(&subjlabel_sb);
574 sbuf_delete(&subjtext_sb);
575 sbuf_delete(&objlabel_sb);
576
577 return (0);
578 }
579
580 /*
581 * Relabel "to" to "from" only if "from" is a valid label (contains at least
582 * a single), as for a relabel operation which may or may not involve a
583 * relevant label.
584 */
585 static void
586 try_relabel(struct mac_lomac *from, struct mac_lomac *to)
587 {
588
589 if (from->ml_flags & MAC_LOMAC_FLAG_SINGLE) {
590 bzero(to, sizeof(*to));
591 lomac_copy(from, to);
592 }
593 }
594
595 static void
596 ast_mac(struct thread *td, int tda __unused)
597 {
598 mac_thread_userret(td);
599 }
600
601 /*
602 * Policy module operations.
603 */
604 static void
605 lomac_init(struct mac_policy_conf *conf __unused)
606 {
607 ast_register(TDA_MAC, ASTR_ASTF_REQUIRED, 0, ast_mac);
608 }
609
610 static void
611 lomac_fini(struct mac_policy_conf *conf __unused)
612 {
613 ast_deregister(TDA_MAC);
614 }
615
616 /*
617 * Label operations.
618 */
619 static void
620 lomac_init_label(struct label *label)
621 {
622
623 SLOT_SET(label, lomac_alloc(M_WAITOK));
624 }
625
626 static int
627 lomac_init_label_waitcheck(struct label *label, int flag)
628 {
629
630 SLOT_SET(label, lomac_alloc(flag));
631 if (SLOT(label) == NULL)
632 return (ENOMEM);
633
634 return (0);
635 }
636
637 static void
638 lomac_destroy_label(struct label *label)
639 {
640
641 lomac_free(SLOT(label));
642 SLOT_SET(label, NULL);
643 }
644
645 static int
646 lomac_element_to_string(struct sbuf *sb, struct mac_lomac_element *element)
647 {
648
649 switch (element->mle_type) {
650 case MAC_LOMAC_TYPE_HIGH:
651 return (sbuf_printf(sb, "high"));
652
653 case MAC_LOMAC_TYPE_LOW:
654 return (sbuf_printf(sb, "low"));
655
656 case MAC_LOMAC_TYPE_EQUAL:
657 return (sbuf_printf(sb, "equal"));
658
659 case MAC_LOMAC_TYPE_GRADE:
660 return (sbuf_printf(sb, "%d", element->mle_grade));
661
662 default:
663 panic("lomac_element_to_string: invalid type (%d)",
664 element->mle_type);
665 }
666 }
667
668 static int
669 lomac_to_string(struct sbuf *sb, struct mac_lomac *ml)
670 {
671
672 if (ml->ml_flags & MAC_LOMAC_FLAG_SINGLE) {
673 if (lomac_element_to_string(sb, &ml->ml_single) == -1)
674 return (EINVAL);
675 }
676
677 if (ml->ml_flags & MAC_LOMAC_FLAG_AUX) {
678 if (sbuf_putc(sb, '[') == -1)
679 return (EINVAL);
680
681 if (lomac_element_to_string(sb, &ml->ml_auxsingle) == -1)
682 return (EINVAL);
683
684 if (sbuf_putc(sb, ']') == -1)
685 return (EINVAL);
686 }
687
688 if (ml->ml_flags & MAC_LOMAC_FLAG_RANGE) {
689 if (sbuf_putc(sb, '(') == -1)
690 return (EINVAL);
691
692 if (lomac_element_to_string(sb, &ml->ml_rangelow) == -1)
693 return (EINVAL);
694
695 if (sbuf_putc(sb, '-') == -1)
696 return (EINVAL);
697
698 if (lomac_element_to_string(sb, &ml->ml_rangehigh) == -1)
699 return (EINVAL);
700
701 if (sbuf_putc(sb, ')') == -1)
702 return (EINVAL);
703 }
704
705 return (0);
706 }
707
708 static int
709 lomac_externalize_label(struct label *label, char *element_name,
710 struct sbuf *sb, int *claimed)
711 {
712 struct mac_lomac *ml;
713
714 if (strcmp(MAC_LOMAC_LABEL_NAME, element_name) != 0)
715 return (0);
716
717 (*claimed)++;
718
719 ml = SLOT(label);
720
721 return (lomac_to_string(sb, ml));
722 }
723
724 static int
725 lomac_parse_element(struct mac_lomac_element *element, char *string)
726 {
727
728 if (strcmp(string, "high") == 0 || strcmp(string, "hi") == 0) {
729 element->mle_type = MAC_LOMAC_TYPE_HIGH;
730 element->mle_grade = MAC_LOMAC_TYPE_UNDEF;
731 } else if (strcmp(string, "low") == 0 || strcmp(string, "lo") == 0) {
732 element->mle_type = MAC_LOMAC_TYPE_LOW;
733 element->mle_grade = MAC_LOMAC_TYPE_UNDEF;
734 } else if (strcmp(string, "equal") == 0 ||
735 strcmp(string, "eq") == 0) {
736 element->mle_type = MAC_LOMAC_TYPE_EQUAL;
737 element->mle_grade = MAC_LOMAC_TYPE_UNDEF;
738 } else {
739 char *p0, *p1;
740 int d;
741
742 p0 = string;
743 d = strtol(p0, &p1, 10);
744
745 if (d < 0 || d > 65535)
746 return (EINVAL);
747 element->mle_type = MAC_LOMAC_TYPE_GRADE;
748 element->mle_grade = d;
749
750 if (p1 == p0 || *p1 != '\0')
751 return (EINVAL);
752 }
753
754 return (0);
755 }
756
757 /*
758 * Note: destructively consumes the string, make a local copy before calling
759 * if that's a problem.
760 */
761 static int
762 lomac_parse(struct mac_lomac *ml, char *string)
763 {
764 char *range, *rangeend, *rangehigh, *rangelow, *single, *auxsingle,
765 *auxsingleend;
766 int error;
767
768 /* Do we have a range? */
769 single = string;
770 range = strchr(string, '(');
771 if (range == single)
772 single = NULL;
773 auxsingle = strchr(string, '[');
774 if (auxsingle == single)
775 single = NULL;
776 if (range != NULL && auxsingle != NULL)
777 return (EINVAL);
778 rangelow = rangehigh = NULL;
779 if (range != NULL) {
780 /* Nul terminate the end of the single string. */
781 *range = '\0';
782 range++;
783 rangelow = range;
784 rangehigh = strchr(rangelow, '-');
785 if (rangehigh == NULL)
786 return (EINVAL);
787 rangehigh++;
788 if (*rangelow == '\0' || *rangehigh == '\0')
789 return (EINVAL);
790 rangeend = strchr(rangehigh, ')');
791 if (rangeend == NULL)
792 return (EINVAL);
793 if (*(rangeend + 1) != '\0')
794 return (EINVAL);
795 /* Nul terminate the ends of the ranges. */
796 *(rangehigh - 1) = '\0';
797 *rangeend = '\0';
798 }
799 KASSERT((rangelow != NULL && rangehigh != NULL) ||
800 (rangelow == NULL && rangehigh == NULL),
801 ("lomac_internalize_label: range mismatch"));
802 if (auxsingle != NULL) {
803 /* Nul terminate the end of the single string. */
804 *auxsingle = '\0';
805 auxsingle++;
806 auxsingleend = strchr(auxsingle, ']');
807 if (auxsingleend == NULL)
808 return (EINVAL);
809 if (*(auxsingleend + 1) != '\0')
810 return (EINVAL);
811 /* Nul terminate the end of the auxsingle. */
812 *auxsingleend = '\0';
813 }
814
815 bzero(ml, sizeof(*ml));
816 if (single != NULL) {
817 error = lomac_parse_element(&ml->ml_single, single);
818 if (error)
819 return (error);
820 ml->ml_flags |= MAC_LOMAC_FLAG_SINGLE;
821 }
822
823 if (auxsingle != NULL) {
824 error = lomac_parse_element(&ml->ml_auxsingle, auxsingle);
825 if (error)
826 return (error);
827 ml->ml_flags |= MAC_LOMAC_FLAG_AUX;
828 }
829
830 if (rangelow != NULL) {
831 error = lomac_parse_element(&ml->ml_rangelow, rangelow);
832 if (error)
833 return (error);
834 error = lomac_parse_element(&ml->ml_rangehigh, rangehigh);
835 if (error)
836 return (error);
837 ml->ml_flags |= MAC_LOMAC_FLAG_RANGE;
838 }
839
840 error = lomac_valid(ml);
841 if (error)
842 return (error);
843
844 return (0);
845 }
846
847 static int
848 lomac_internalize_label(struct label *label, char *element_name,
849 char *element_data, int *claimed)
850 {
851 struct mac_lomac *ml, ml_temp;
852 int error;
853
854 if (strcmp(MAC_LOMAC_LABEL_NAME, element_name) != 0)
855 return (0);
856
857 (*claimed)++;
858
859 error = lomac_parse(&ml_temp, element_data);
860 if (error)
861 return (error);
862
863 ml = SLOT(label);
864 *ml = ml_temp;
865
866 return (0);
867 }
868
869 static void
870 lomac_copy_label(struct label *src, struct label *dest)
871 {
872
873 *SLOT(dest) = *SLOT(src);
874 }
875
876 /*
877 * Object-specific entry point implementations are sorted alphabetically by
878 * object type name and then by operation.
879 */
880 static int
881 lomac_bpfdesc_check_receive(struct bpf_d *d, struct label *dlabel,
882 struct ifnet *ifp, struct label *ifplabel)
883 {
884 struct mac_lomac *a, *b;
885
886 if (!lomac_enabled)
887 return (0);
888
889 a = SLOT(dlabel);
890 b = SLOT(ifplabel);
891
892 if (lomac_equal_single(a, b))
893 return (0);
894 return (EACCES);
895 }
896
897 static void
898 lomac_bpfdesc_create(struct ucred *cred, struct bpf_d *d,
899 struct label *dlabel)
900 {
901 struct mac_lomac *source, *dest;
902
903 source = SLOT(cred->cr_label);
904 dest = SLOT(dlabel);
905
906 lomac_copy_single(source, dest);
907 }
908
909 static void
910 lomac_bpfdesc_create_mbuf(struct bpf_d *d, struct label *dlabel,
911 struct mbuf *m, struct label *mlabel)
912 {
913 struct mac_lomac *source, *dest;
914
915 source = SLOT(dlabel);
916 dest = SLOT(mlabel);
917
918 lomac_copy_single(source, dest);
919 }
920
921 static int
922 lomac_cred_check_relabel(struct ucred *cred, struct label *newlabel)
923 {
924 struct mac_lomac *subj, *new;
925 int error;
926
927 subj = SLOT(cred->cr_label);
928 new = SLOT(newlabel);
929
930 /*
931 * If there is a LOMAC label update for the credential, it may be an
932 * update of the single, range, or both.
933 */
934 error = lomac_atmostflags(new, MAC_LOMAC_FLAGS_BOTH);
935 if (error)
936 return (error);
937
938 /*
939 * If the LOMAC label is to be changed, authorize as appropriate.
940 */
941 if (new->ml_flags & MAC_LOMAC_FLAGS_BOTH) {
942 /*
943 * Fill in the missing parts from the previous label.
944 */
945 if ((new->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0)
946 lomac_copy_single(subj, new);
947 if ((new->ml_flags & MAC_LOMAC_FLAG_RANGE) == 0)
948 lomac_copy_range(subj, new);
949
950 /*
951 * To change the LOMAC range on a credential, the new range
952 * label must be in the current range.
953 */
954 if (!lomac_range_in_range(new, subj))
955 return (EPERM);
956
957 /*
958 * To change the LOMAC single label on a credential, the new
959 * single label must be in the new range. Implicitly from
960 * the previous check, the new single is in the old range.
961 */
962 if (!lomac_single_in_range(new, new))
963 return (EPERM);
964
965 /*
966 * To have EQUAL in any component of the new credential LOMAC
967 * label, the subject must already have EQUAL in their label.
968 */
969 if (lomac_contains_equal(new)) {
970 error = lomac_subject_privileged(subj);
971 if (error)
972 return (error);
973 }
974
975 /*
976 * XXXMAC: Additional consistency tests regarding the single
977 * and range of the new label might be performed here.
978 */
979 }
980
981 return (0);
982 }
983
984 static int
985 lomac_cred_check_visible(struct ucred *cr1, struct ucred *cr2)
986 {
987 struct mac_lomac *subj, *obj;
988
989 if (!lomac_enabled)
990 return (0);
991
992 subj = SLOT(cr1->cr_label);
993 obj = SLOT(cr2->cr_label);
994
995 /* XXX: range */
996 if (!lomac_dominate_single(obj, subj))
997 return (ESRCH);
998
999 return (0);
1000 }
1001
1002 static void
1003 lomac_cred_create_init(struct ucred *cred)
1004 {
1005 struct mac_lomac *dest;
1006
1007 dest = SLOT(cred->cr_label);
1008
1009 lomac_set_single(dest, MAC_LOMAC_TYPE_HIGH, 0);
1010 lomac_set_range(dest, MAC_LOMAC_TYPE_LOW, 0, MAC_LOMAC_TYPE_HIGH, 0);
1011 }
1012
1013 static void
1014 lomac_cred_create_swapper(struct ucred *cred)
1015 {
1016 struct mac_lomac *dest;
1017
1018 dest = SLOT(cred->cr_label);
1019
1020 lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0);
1021 lomac_set_range(dest, MAC_LOMAC_TYPE_LOW, 0, MAC_LOMAC_TYPE_HIGH, 0);
1022 }
1023
1024 static void
1025 lomac_cred_relabel(struct ucred *cred, struct label *newlabel)
1026 {
1027 struct mac_lomac *source, *dest;
1028
1029 source = SLOT(newlabel);
1030 dest = SLOT(cred->cr_label);
1031
1032 try_relabel(source, dest);
1033 }
1034
1035 static void
1036 lomac_devfs_create_device(struct ucred *cred, struct mount *mp,
1037 struct cdev *dev, struct devfs_dirent *de, struct label *delabel)
1038 {
1039 struct mac_lomac *ml;
1040 const char *dn;
1041 int lomac_type;
1042
1043 ml = SLOT(delabel);
1044 dn = devtoname(dev);
1045 if (strcmp(dn, "null") == 0 ||
1046 strcmp(dn, "zero") == 0 ||
1047 strcmp(dn, "random") == 0 ||
1048 strncmp(dn, "fd/", strlen("fd/")) == 0 ||
1049 strncmp(dn, "ttyv", strlen("ttyv")) == 0)
1050 lomac_type = MAC_LOMAC_TYPE_EQUAL;
1051 else if (ptys_equal &&
1052 (strncmp(dn, "ttyp", strlen("ttyp")) == 0 ||
1053 strncmp(dn, "pts/", strlen("pts/")) == 0 ||
1054 strncmp(dn, "ptyp", strlen("ptyp")) == 0))
1055 lomac_type = MAC_LOMAC_TYPE_EQUAL;
1056 else
1057 lomac_type = MAC_LOMAC_TYPE_HIGH;
1058 lomac_set_single(ml, lomac_type, 0);
1059 }
1060
1061 static void
1062 lomac_devfs_create_directory(struct mount *mp, char *dirname, int dirnamelen,
1063 struct devfs_dirent *de, struct label *delabel)
1064 {
1065 struct mac_lomac *ml;
1066
1067 ml = SLOT(delabel);
1068 lomac_set_single(ml, MAC_LOMAC_TYPE_HIGH, 0);
1069 }
1070
1071 static void
1072 lomac_devfs_create_symlink(struct ucred *cred, struct mount *mp,
1073 struct devfs_dirent *dd, struct label *ddlabel, struct devfs_dirent *de,
1074 struct label *delabel)
1075 {
1076 struct mac_lomac *source, *dest;
1077
1078 source = SLOT(cred->cr_label);
1079 dest = SLOT(delabel);
1080
1081 lomac_copy_single(source, dest);
1082 }
1083
1084 static void
1085 lomac_devfs_update(struct mount *mp, struct devfs_dirent *de,
1086 struct label *delabel, struct vnode *vp, struct label *vplabel)
1087 {
1088 struct mac_lomac *source, *dest;
1089
1090 source = SLOT(vplabel);
1091 dest = SLOT(delabel);
1092
1093 lomac_copy(source, dest);
1094 }
1095
1096 static void
1097 lomac_devfs_vnode_associate(struct mount *mp, struct label *mplabel,
1098 struct devfs_dirent *de, struct label *delabel, struct vnode *vp,
1099 struct label *vplabel)
1100 {
1101 struct mac_lomac *source, *dest;
1102
1103 source = SLOT(delabel);
1104 dest = SLOT(vplabel);
1105
1106 lomac_copy_single(source, dest);
1107 }
1108
1109 static int
1110 lomac_ifnet_check_relabel(struct ucred *cred, struct ifnet *ifp,
1111 struct label *ifplabel, struct label *newlabel)
1112 {
1113 struct mac_lomac *subj, *new;
1114 int error;
1115
1116 subj = SLOT(cred->cr_label);
1117 new = SLOT(newlabel);
1118
1119 /*
1120 * If there is a LOMAC label update for the interface, it may be an
1121 * update of the single, range, or both.
1122 */
1123 error = lomac_atmostflags(new, MAC_LOMAC_FLAGS_BOTH);
1124 if (error)
1125 return (error);
1126
1127 /*
1128 * Relabling network interfaces requires LOMAC privilege.
1129 */
1130 error = lomac_subject_privileged(subj);
1131 if (error)
1132 return (error);
1133
1134 /*
1135 * If the LOMAC label is to be changed, authorize as appropriate.
1136 */
1137 if (new->ml_flags & MAC_LOMAC_FLAGS_BOTH) {
1138 /*
1139 * Fill in the missing parts from the previous label.
1140 */
1141 if ((new->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0)
1142 lomac_copy_single(subj, new);
1143 if ((new->ml_flags & MAC_LOMAC_FLAG_RANGE) == 0)
1144 lomac_copy_range(subj, new);
1145
1146 /*
1147 * Rely on the traditional superuser status for the LOMAC
1148 * interface relabel requirements. XXXMAC: This will go
1149 * away.
1150 *
1151 * XXXRW: This is also redundant to a higher layer check.
1152 */
1153 error = priv_check_cred(cred, PRIV_NET_SETIFMAC);
1154 if (error)
1155 return (EPERM);
1156
1157 /*
1158 * XXXMAC: Additional consistency tests regarding the single
1159 * and the range of the new label might be performed here.
1160 */
1161 }
1162
1163 return (0);
1164 }
1165
1166 static int
1167 lomac_ifnet_check_transmit(struct ifnet *ifp, struct label *ifplabel,
1168 struct mbuf *m, struct label *mlabel)
1169 {
1170 struct mac_lomac *p, *i;
1171
1172 if (!lomac_enabled)
1173 return (0);
1174
1175 p = SLOT(mlabel);
1176 i = SLOT(ifplabel);
1177
1178 return (lomac_single_in_range(p, i) ? 0 : EACCES);
1179 }
1180
1181 static void
1182 lomac_ifnet_create(struct ifnet *ifp, struct label *ifplabel)
1183 {
1184 char tifname[IFNAMSIZ], *p, *q;
1185 char tiflist[sizeof(trusted_interfaces)];
1186 struct mac_lomac *dest;
1187 int len, grade;
1188
1189 dest = SLOT(ifplabel);
1190
1191 if (ifp->if_type == IFT_LOOP) {
1192 grade = MAC_LOMAC_TYPE_EQUAL;
1193 goto set;
1194 }
1195
1196 if (trust_all_interfaces) {
1197 grade = MAC_LOMAC_TYPE_HIGH;
1198 goto set;
1199 }
1200
1201 grade = MAC_LOMAC_TYPE_LOW;
1202
1203 if (trusted_interfaces[0] == '\0' ||
1204 !strvalid(trusted_interfaces, sizeof(trusted_interfaces)))
1205 goto set;
1206
1207 bzero(tiflist, sizeof(tiflist));
1208 for (p = trusted_interfaces, q = tiflist; *p != '\0'; p++, q++)
1209 if(*p != ' ' && *p != '\t')
1210 *q = *p;
1211
1212 for (p = q = tiflist;; p++) {
1213 if (*p == ',' || *p == '\0') {
1214 len = p - q;
1215 if (len < IFNAMSIZ) {
1216 bzero(tifname, sizeof(tifname));
1217 bcopy(q, tifname, len);
1218 if (strcmp(tifname, ifp->if_xname) == 0) {
1219 grade = MAC_LOMAC_TYPE_HIGH;
1220 break;
1221 }
1222 }
1223 else {
1224 *p = '\0';
1225 printf("MAC/LOMAC warning: interface name "
1226 "\"%s\" is too long (must be < %d)\n",
1227 q, IFNAMSIZ);
1228 }
1229 if (*p == '\0')
1230 break;
1231 q = p + 1;
1232 }
1233 }
1234 set:
1235 lomac_set_single(dest, grade, 0);
1236 lomac_set_range(dest, grade, 0, grade, 0);
1237 }
1238
1239 static void
1240 lomac_ifnet_create_mbuf(struct ifnet *ifp, struct label *ifplabel,
1241 struct mbuf *m, struct label *mlabel)
1242 {
1243 struct mac_lomac *source, *dest;
1244
1245 source = SLOT(ifplabel);
1246 dest = SLOT(mlabel);
1247
1248 lomac_copy_single(source, dest);
1249 }
1250
1251 static void
1252 lomac_ifnet_relabel(struct ucred *cred, struct ifnet *ifp,
1253 struct label *ifplabel, struct label *newlabel)
1254 {
1255 struct mac_lomac *source, *dest;
1256
1257 source = SLOT(newlabel);
1258 dest = SLOT(ifplabel);
1259
1260 try_relabel(source, dest);
1261 }
1262
1263 static int
1264 lomac_inpcb_check_deliver(struct inpcb *inp, struct label *inplabel,
1265 struct mbuf *m, struct label *mlabel)
1266 {
1267 struct mac_lomac *p, *i;
1268
1269 if (!lomac_enabled)
1270 return (0);
1271
1272 p = SLOT(mlabel);
1273 i = SLOT(inplabel);
1274
1275 return (lomac_equal_single(p, i) ? 0 : EACCES);
1276 }
1277
1278 static int
1279 lomac_inpcb_check_visible(struct ucred *cred, struct inpcb *inp,
1280 struct label *inplabel)
1281 {
1282 struct mac_lomac *subj, *obj;
1283
1284 if (!lomac_enabled)
1285 return (0);
1286
1287 subj = SLOT(cred->cr_label);
1288 obj = SLOT(inplabel);
1289
1290 if (!lomac_dominate_single(obj, subj))
1291 return (ENOENT);
1292
1293 return (0);
1294 }
1295
1296 static void
1297 lomac_inpcb_create(struct socket *so, struct label *solabel,
1298 struct inpcb *inp, struct label *inplabel)
1299 {
1300 struct mac_lomac *source, *dest;
1301
1302 source = SLOT(solabel);
1303 dest = SLOT(inplabel);
1304
1305 lomac_copy_single(source, dest);
1306 }
1307
1308 static void
1309 lomac_inpcb_create_mbuf(struct inpcb *inp, struct label *inplabel,
1310 struct mbuf *m, struct label *mlabel)
1311 {
1312 struct mac_lomac *source, *dest;
1313
1314 source = SLOT(inplabel);
1315 dest = SLOT(mlabel);
1316
1317 lomac_copy_single(source, dest);
1318 }
1319
1320 static void
1321 lomac_inpcb_sosetlabel(struct socket *so, struct label *solabel,
1322 struct inpcb *inp, struct label *inplabel)
1323 {
1324 struct mac_lomac *source, *dest;
1325
1326 SOCK_LOCK_ASSERT(so);
1327
1328 source = SLOT(solabel);
1329 dest = SLOT(inplabel);
1330
1331 lomac_copy_single(source, dest);
1332 }
1333
1334 static void
1335 lomac_ip6q_create(struct mbuf *m, struct label *mlabel, struct ip6q *q6,
1336 struct label *q6label)
1337 {
1338 struct mac_lomac *source, *dest;
1339
1340 source = SLOT(mlabel);
1341 dest = SLOT(q6label);
1342
1343 lomac_copy_single(source, dest);
1344 }
1345
1346 static int
1347 lomac_ip6q_match(struct mbuf *m, struct label *mlabel, struct ip6q *q6,
1348 struct label *q6label)
1349 {
1350 struct mac_lomac *a, *b;
1351
1352 a = SLOT(q6label);
1353 b = SLOT(mlabel);
1354
1355 return (lomac_equal_single(a, b));
1356 }
1357
1358 static void
1359 lomac_ip6q_reassemble(struct ip6q *q6, struct label *q6label, struct mbuf *m,
1360 struct label *mlabel)
1361 {
1362 struct mac_lomac *source, *dest;
1363
1364 source = SLOT(q6label);
1365 dest = SLOT(mlabel);
1366
1367 /* Just use the head, since we require them all to match. */
1368 lomac_copy_single(source, dest);
1369 }
1370
1371 static void
1372 lomac_ip6q_update(struct mbuf *m, struct label *mlabel, struct ip6q *q6,
1373 struct label *q6label)
1374 {
1375
1376 /* NOOP: we only accept matching labels, so no need to update */
1377 }
1378
1379 static void
1380 lomac_ipq_create(struct mbuf *m, struct label *mlabel, struct ipq *q,
1381 struct label *qlabel)
1382 {
1383 struct mac_lomac *source, *dest;
1384
1385 source = SLOT(mlabel);
1386 dest = SLOT(qlabel);
1387
1388 lomac_copy_single(source, dest);
1389 }
1390
1391 static int
1392 lomac_ipq_match(struct mbuf *m, struct label *mlabel, struct ipq *q,
1393 struct label *qlabel)
1394 {
1395 struct mac_lomac *a, *b;
1396
1397 a = SLOT(qlabel);
1398 b = SLOT(mlabel);
1399
1400 return (lomac_equal_single(a, b));
1401 }
1402
1403 static void
1404 lomac_ipq_reassemble(struct ipq *q, struct label *qlabel, struct mbuf *m,
1405 struct label *mlabel)
1406 {
1407 struct mac_lomac *source, *dest;
1408
1409 source = SLOT(qlabel);
1410 dest = SLOT(mlabel);
1411
1412 /* Just use the head, since we require them all to match. */
1413 lomac_copy_single(source, dest);
1414 }
1415
1416 static void
1417 lomac_ipq_update(struct mbuf *m, struct label *mlabel, struct ipq *q,
1418 struct label *qlabel)
1419 {
1420
1421 /* NOOP: we only accept matching labels, so no need to update */
1422 }
1423
1424 static int
1425 lomac_kld_check_load(struct ucred *cred, struct vnode *vp,
1426 struct label *vplabel)
1427 {
1428 struct mac_lomac *subj, *obj;
1429
1430 if (!lomac_enabled)
1431 return (0);
1432
1433 subj = SLOT(cred->cr_label);
1434 obj = SLOT(vplabel);
1435
1436 if (lomac_subject_privileged(subj))
1437 return (EPERM);
1438
1439 if (!lomac_high_single(obj))
1440 return (EACCES);
1441
1442 return (0);
1443 }
1444
1445 static void
1446 lomac_mount_create(struct ucred *cred, struct mount *mp,
1447 struct label *mplabel)
1448 {
1449 struct mac_lomac *source, *dest;
1450
1451 source = SLOT(cred->cr_label);
1452 dest = SLOT(mplabel);
1453 lomac_copy_single(source, dest);
1454 }
1455
1456 static void
1457 lomac_netinet_arp_send(struct ifnet *ifp, struct label *ifplabel,
1458 struct mbuf *m, struct label *mlabel)
1459 {
1460 struct mac_lomac *dest;
1461
1462 dest = SLOT(mlabel);
1463
1464 lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0);
1465 }
1466
1467 static void
1468 lomac_netinet_firewall_reply(struct mbuf *mrecv, struct label *mrecvlabel,
1469 struct mbuf *msend, struct label *msendlabel)
1470 {
1471 struct mac_lomac *source, *dest;
1472
1473 source = SLOT(mrecvlabel);
1474 dest = SLOT(msendlabel);
1475
1476 lomac_copy_single(source, dest);
1477 }
1478
1479 static void
1480 lomac_netinet_firewall_send(struct mbuf *m, struct label *mlabel)
1481 {
1482 struct mac_lomac *dest;
1483
1484 dest = SLOT(mlabel);
1485
1486 /* XXX: where is the label for the firewall really coming from? */
1487 lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0);
1488 }
1489
1490 static void
1491 lomac_netinet_fragment(struct mbuf *m, struct label *mlabel,
1492 struct mbuf *frag, struct label *fraglabel)
1493 {
1494 struct mac_lomac *source, *dest;
1495
1496 source = SLOT(mlabel);
1497 dest = SLOT(fraglabel);
1498
1499 lomac_copy_single(source, dest);
1500 }
1501
1502 static void
1503 lomac_netinet_icmp_reply(struct mbuf *mrecv, struct label *mrecvlabel,
1504 struct mbuf *msend, struct label *msendlabel)
1505 {
1506 struct mac_lomac *source, *dest;
1507
1508 source = SLOT(mrecvlabel);
1509 dest = SLOT(msendlabel);
1510
1511 lomac_copy_single(source, dest);
1512 }
1513
1514 static void
1515 lomac_netinet_igmp_send(struct ifnet *ifp, struct label *ifplabel,
1516 struct mbuf *m, struct label *mlabel)
1517 {
1518 struct mac_lomac *dest;
1519
1520 dest = SLOT(mlabel);
1521
1522 lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0);
1523 }
1524
1525 static void
1526 lomac_netinet6_nd6_send(struct ifnet *ifp, struct label *ifplabel,
1527 struct mbuf *m, struct label *mlabel)
1528 {
1529 struct mac_lomac *dest;
1530
1531 dest = SLOT(mlabel);
1532
1533 lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0);
1534 }
1535
1536 static int
1537 lomac_pipe_check_ioctl(struct ucred *cred, struct pipepair *pp,
1538 struct label *pplabel, unsigned long cmd, void /* caddr_t */ *data)
1539 {
1540
1541 if (!lomac_enabled)
1542 return (0);
1543
1544 /* XXX: This will be implemented soon... */
1545
1546 return (0);
1547 }
1548
1549 static int
1550 lomac_pipe_check_read(struct ucred *cred, struct pipepair *pp,
1551 struct label *pplabel)
1552 {
1553 struct mac_lomac *subj, *obj;
1554
1555 if (!lomac_enabled)
1556 return (0);
1557
1558 subj = SLOT(cred->cr_label);
1559 obj = SLOT(pplabel);
1560
1561 if (!lomac_dominate_single(obj, subj))
1562 return (maybe_demote(subj, obj, "reading", "pipe", NULL));
1563
1564 return (0);
1565 }
1566
1567 static int
1568 lomac_pipe_check_relabel(struct ucred *cred, struct pipepair *pp,
1569 struct label *pplabel, struct label *newlabel)
1570 {
1571 struct mac_lomac *subj, *obj, *new;
1572 int error;
1573
1574 new = SLOT(newlabel);
1575 subj = SLOT(cred->cr_label);
1576 obj = SLOT(pplabel);
1577
1578 /*
1579 * If there is a LOMAC label update for a pipe, it must be a single
1580 * update.
1581 */
1582 error = lomac_atmostflags(new, MAC_LOMAC_FLAG_SINGLE);
1583 if (error)
1584 return (error);
1585
1586 /*
1587 * To perform a relabel of a pipe (LOMAC label or not), LOMAC must
1588 * authorize the relabel.
1589 */
1590 if (!lomac_single_in_range(obj, subj))
1591 return (EPERM);
1592
1593 /*
1594 * If the LOMAC label is to be changed, authorize as appropriate.
1595 */
1596 if (new->ml_flags & MAC_LOMAC_FLAG_SINGLE) {
1597 /*
1598 * To change the LOMAC label on a pipe, the new pipe label
1599 * must be in the subject range.
1600 */
1601 if (!lomac_single_in_range(new, subj))
1602 return (EPERM);
1603
1604 /*
1605 * To change the LOMAC label on a pipe to be EQUAL, the
1606 * subject must have appropriate privilege.
1607 */
1608 if (lomac_contains_equal(new)) {
1609 error = lomac_subject_privileged(subj);
1610 if (error)
1611 return (error);
1612 }
1613 }
1614
1615 return (0);
1616 }
1617
1618 static int
1619 lomac_pipe_check_write(struct ucred *cred, struct pipepair *pp,
1620 struct label *pplabel)
1621 {
1622 struct mac_lomac *subj, *obj;
1623
1624 if (!lomac_enabled)
1625 return (0);
1626
1627 subj = SLOT(cred->cr_label);
1628 obj = SLOT(pplabel);
1629
1630 if (!lomac_subject_dominate(subj, obj))
1631 return (EACCES);
1632
1633 return (0);
1634 }
1635
1636 static void
1637 lomac_pipe_create(struct ucred *cred, struct pipepair *pp,
1638 struct label *pplabel)
1639 {
1640 struct mac_lomac *source, *dest;
1641
1642 source = SLOT(cred->cr_label);
1643 dest = SLOT(pplabel);
1644
1645 lomac_copy_single(source, dest);
1646 }
1647
1648 static void
1649 lomac_pipe_relabel(struct ucred *cred, struct pipepair *pp,
1650 struct label *pplabel, struct label *newlabel)
1651 {
1652 struct mac_lomac *source, *dest;
1653
1654 source = SLOT(newlabel);
1655 dest = SLOT(pplabel);
1656
1657 try_relabel(source, dest);
1658 }
1659
1660 /*
1661 * Some system privileges are allowed regardless of integrity grade; others
1662 * are allowed only when running with privilege with respect to the LOMAC
1663 * policy as they might otherwise allow bypassing of the integrity policy.
1664 */
1665 static int
1666 lomac_priv_check(struct ucred *cred, int priv)
1667 {
1668 struct mac_lomac *subj;
1669 int error;
1670
1671 if (!lomac_enabled)
1672 return (0);
1673
1674 /*
1675 * Exempt only specific privileges from the LOMAC integrity policy.
1676 */
1677 switch (priv) {
1678 case PRIV_KTRACE:
1679 case PRIV_MSGBUF:
1680
1681 /*
1682 * Allow processes to manipulate basic process audit properties, and
1683 * to submit audit records.
1684 */
1685 case PRIV_AUDIT_GETAUDIT:
1686 case PRIV_AUDIT_SETAUDIT:
1687 case PRIV_AUDIT_SUBMIT:
1688
1689 /*
1690 * Allow processes to manipulate their regular UNIX credentials.
1691 */
1692 case PRIV_CRED_SETUID:
1693 case PRIV_CRED_SETEUID:
1694 case PRIV_CRED_SETGID:
1695 case PRIV_CRED_SETEGID:
1696 case PRIV_CRED_SETGROUPS:
1697 case PRIV_CRED_SETREUID:
1698 case PRIV_CRED_SETREGID:
1699 case PRIV_CRED_SETRESUID:
1700 case PRIV_CRED_SETRESGID:
1701
1702 /*
1703 * Allow processes to perform system monitoring.
1704 */
1705 case PRIV_SEEOTHERGIDS:
1706 case PRIV_SEEOTHERUIDS:
1707 break;
1708
1709 /*
1710 * Allow access to general process debugging facilities. We
1711 * separately control debugging based on MAC label.
1712 */
1713 case PRIV_DEBUG_DIFFCRED:
1714 case PRIV_DEBUG_SUGID:
1715 case PRIV_DEBUG_UNPRIV:
1716
1717 /*
1718 * Allow manipulating jails.
1719 */
1720 case PRIV_JAIL_ATTACH:
1721
1722 /*
1723 * Allow privilege with respect to the Partition policy, but not the
1724 * Privs policy.
1725 */
1726 case PRIV_MAC_PARTITION:
1727
1728 /*
1729 * Allow privilege with respect to process resource limits and login
1730 * context.
1731 */
1732 case PRIV_PROC_LIMIT:
1733 case PRIV_PROC_SETLOGIN:
1734 case PRIV_PROC_SETRLIMIT:
1735
1736 /*
1737 * Allow System V and POSIX IPC privileges.
1738 */
1739 case PRIV_IPC_READ:
1740 case PRIV_IPC_WRITE:
1741 case PRIV_IPC_ADMIN:
1742 case PRIV_IPC_MSGSIZE:
1743 case PRIV_MQ_ADMIN:
1744
1745 /*
1746 * Allow certain scheduler manipulations -- possibly this should be
1747 * controlled by more fine-grained policy, as potentially low
1748 * integrity processes can deny CPU to higher integrity ones.
1749 */
1750 case PRIV_SCHED_DIFFCRED:
1751 case PRIV_SCHED_SETPRIORITY:
1752 case PRIV_SCHED_RTPRIO:
1753 case PRIV_SCHED_SETPOLICY:
1754 case PRIV_SCHED_SET:
1755 case PRIV_SCHED_SETPARAM:
1756 case PRIV_SCHED_IDPRIO:
1757
1758 /*
1759 * More IPC privileges.
1760 */
1761 case PRIV_SEM_WRITE:
1762
1763 /*
1764 * Allow signaling privileges subject to integrity policy.
1765 */
1766 case PRIV_SIGNAL_DIFFCRED:
1767 case PRIV_SIGNAL_SUGID:
1768
1769 /*
1770 * Allow access to only limited sysctls from lower integrity levels;
1771 * piggy-back on the Jail definition.
1772 */
1773 case PRIV_SYSCTL_WRITEJAIL:
1774
1775 /*
1776 * Allow TTY-based privileges, subject to general device access using
1777 * labels on TTY device nodes, but not console privilege.
1778 */
1779 case PRIV_TTY_DRAINWAIT:
1780 case PRIV_TTY_DTRWAIT:
1781 case PRIV_TTY_EXCLUSIVE:
1782 case PRIV_TTY_STI:
1783 case PRIV_TTY_SETA:
1784
1785 /*
1786 * Grant most VFS privileges, as almost all are in practice bounded
1787 * by more specific checks using labels.
1788 */
1789 case PRIV_VFS_READ:
1790 case PRIV_VFS_WRITE:
1791 case PRIV_VFS_ADMIN:
1792 case PRIV_VFS_EXEC:
1793 case PRIV_VFS_LOOKUP:
1794 case PRIV_VFS_CHFLAGS_DEV:
1795 case PRIV_VFS_CHOWN:
1796 case PRIV_VFS_CHROOT:
1797 case PRIV_VFS_RETAINSUGID:
1798 case PRIV_VFS_EXCEEDQUOTA:
1799 case PRIV_VFS_FCHROOT:
1800 case PRIV_VFS_FHOPEN:
1801 case PRIV_VFS_FHSTATFS:
1802 case PRIV_VFS_GENERATION:
1803 case PRIV_VFS_GETFH:
1804 case PRIV_VFS_GETQUOTA:
1805 case PRIV_VFS_LINK:
1806 case PRIV_VFS_MOUNT:
1807 case PRIV_VFS_MOUNT_OWNER:
1808 case PRIV_VFS_MOUNT_PERM:
1809 case PRIV_VFS_MOUNT_SUIDDIR:
1810 case PRIV_VFS_MOUNT_NONUSER:
1811 case PRIV_VFS_SETGID:
1812 case PRIV_VFS_STICKYFILE:
1813 case PRIV_VFS_SYSFLAGS:
1814 case PRIV_VFS_UNMOUNT:
1815
1816 /*
1817 * Allow VM privileges; it would be nice if these were subject to
1818 * resource limits.
1819 */
1820 case PRIV_VM_MADV_PROTECT:
1821 case PRIV_VM_MLOCK:
1822 case PRIV_VM_MUNLOCK:
1823 case PRIV_VM_SWAP_NOQUOTA:
1824 case PRIV_VM_SWAP_NORLIMIT:
1825
1826 /*
1827 * Allow some but not all network privileges. In general, dont allow
1828 * reconfiguring the network stack, just normal use.
1829 */
1830 case PRIV_NETINET_RESERVEDPORT:
1831 case PRIV_NETINET_RAW:
1832 case PRIV_NETINET_REUSEPORT:
1833 break;
1834
1835 /*
1836 * All remaining system privileges are allow only if the process
1837 * holds privilege with respect to the LOMAC policy.
1838 */
1839 default:
1840 subj = SLOT(cred->cr_label);
1841 error = lomac_subject_privileged(subj);
1842 if (error)
1843 return (error);
1844 }
1845 return (0);
1846 }
1847
1848 static int
1849 lomac_proc_check_debug(struct ucred *cred, struct proc *p)
1850 {
1851 struct mac_lomac *subj, *obj;
1852
1853 if (!lomac_enabled)
1854 return (0);
1855
1856 subj = SLOT(cred->cr_label);
1857 obj = SLOT(p->p_ucred->cr_label);
1858
1859 /* XXX: range checks */
1860 if (!lomac_dominate_single(obj, subj))
1861 return (ESRCH);
1862 if (!lomac_subject_dominate(subj, obj))
1863 return (EACCES);
1864
1865 return (0);
1866 }
1867
1868 static int
1869 lomac_proc_check_sched(struct ucred *cred, struct proc *p)
1870 {
1871 struct mac_lomac *subj, *obj;
1872
1873 if (!lomac_enabled)
1874 return (0);
1875
1876 subj = SLOT(cred->cr_label);
1877 obj = SLOT(p->p_ucred->cr_label);
1878
1879 /* XXX: range checks */
1880 if (!lomac_dominate_single(obj, subj))
1881 return (ESRCH);
1882 if (!lomac_subject_dominate(subj, obj))
1883 return (EACCES);
1884
1885 return (0);
1886 }
1887
1888 static int
1889 lomac_proc_check_signal(struct ucred *cred, struct proc *p, int signum)
1890 {
1891 struct mac_lomac *subj, *obj;
1892
1893 if (!lomac_enabled)
1894 return (0);
1895
1896 subj = SLOT(cred->cr_label);
1897 obj = SLOT(p->p_ucred->cr_label);
1898
1899 /* XXX: range checks */
1900 if (!lomac_dominate_single(obj, subj))
1901 return (ESRCH);
1902 if (!lomac_subject_dominate(subj, obj))
1903 return (EACCES);
1904
1905 return (0);
1906 }
1907
1908 static void
1909 lomac_proc_destroy_label(struct label *label)
1910 {
1911
1912 mtx_destroy(&PSLOT(label)->mtx);
1913 free(PSLOT(label), M_LOMAC);
1914 PSLOT_SET(label, NULL);
1915 }
1916
1917 static void
1918 lomac_proc_init_label(struct label *label)
1919 {
1920
1921 PSLOT_SET(label, malloc(sizeof(struct mac_lomac_proc), M_LOMAC,
1922 M_ZERO | M_WAITOK));
1923 mtx_init(&PSLOT(label)->mtx, "MAC/Lomac proc lock", NULL, MTX_DEF);
1924 }
1925
1926 static int
1927 lomac_socket_check_deliver(struct socket *so, struct label *solabel,
1928 struct mbuf *m, struct label *mlabel)
1929 {
1930 struct mac_lomac *p, *s;
1931 int error;
1932
1933 if (!lomac_enabled)
1934 return (0);
1935
1936 p = SLOT(mlabel);
1937 s = SLOT(solabel);
1938
1939 SOCK_LOCK(so);
1940 error = lomac_equal_single(p, s) ? 0 : EACCES;
1941 SOCK_UNLOCK(so);
1942 return (error);
1943 }
1944
1945 static int
1946 lomac_socket_check_relabel(struct ucred *cred, struct socket *so,
1947 struct label *solabel, struct label *newlabel)
1948 {
1949 struct mac_lomac *subj, *obj, *new;
1950 int error;
1951
1952 SOCK_LOCK_ASSERT(so);
1953
1954 new = SLOT(newlabel);
1955 subj = SLOT(cred->cr_label);
1956 obj = SLOT(solabel);
1957
1958 /*
1959 * If there is a LOMAC label update for the socket, it may be an
1960 * update of single.
1961 */
1962 error = lomac_atmostflags(new, MAC_LOMAC_FLAG_SINGLE);
1963 if (error)
1964 return (error);
1965
1966 /*
1967 * To relabel a socket, the old socket single must be in the subject
1968 * range.
1969 */
1970 if (!lomac_single_in_range(obj, subj))
1971 return (EPERM);
1972
1973 /*
1974 * If the LOMAC label is to be changed, authorize as appropriate.
1975 */
1976 if (new->ml_flags & MAC_LOMAC_FLAG_SINGLE) {
1977 /*
1978 * To relabel a socket, the new socket single must be in the
1979 * subject range.
1980 */
1981 if (!lomac_single_in_range(new, subj))
1982 return (EPERM);
1983
1984 /*
1985 * To change the LOMAC label on the socket to contain EQUAL,
1986 * the subject must have appropriate privilege.
1987 */
1988 if (lomac_contains_equal(new)) {
1989 error = lomac_subject_privileged(subj);
1990 if (error)
1991 return (error);
1992 }
1993 }
1994
1995 return (0);
1996 }
1997
1998 static int
1999 lomac_socket_check_visible(struct ucred *cred, struct socket *so,
2000 struct label *solabel)
2001 {
2002 struct mac_lomac *subj, *obj;
2003
2004 if (!lomac_enabled)
2005 return (0);
2006
2007 subj = SLOT(cred->cr_label);
2008 obj = SLOT(solabel);
2009
2010 SOCK_LOCK(so);
2011 if (!lomac_dominate_single(obj, subj)) {
2012 SOCK_UNLOCK(so);
2013 return (ENOENT);
2014 }
2015 SOCK_UNLOCK(so);
2016
2017 return (0);
2018 }
2019
2020 static void
2021 lomac_socket_create(struct ucred *cred, struct socket *so,
2022 struct label *solabel)
2023 {
2024 struct mac_lomac *source, *dest;
2025
2026 source = SLOT(cred->cr_label);
2027 dest = SLOT(solabel);
2028
2029 lomac_copy_single(source, dest);
2030 }
2031
2032 static void
2033 lomac_socket_create_mbuf(struct socket *so, struct label *solabel,
2034 struct mbuf *m, struct label *mlabel)
2035 {
2036 struct mac_lomac *source, *dest;
2037
2038 source = SLOT(solabel);
2039 dest = SLOT(mlabel);
2040
2041 SOCK_LOCK(so);
2042 lomac_copy_single(source, dest);
2043 SOCK_UNLOCK(so);
2044 }
2045
2046 static void
2047 lomac_socket_newconn(struct socket *oldso, struct label *oldsolabel,
2048 struct socket *newso, struct label *newsolabel)
2049 {
2050 struct mac_lomac source, *dest;
2051
2052 SOCK_LOCK(oldso);
2053 source = *SLOT(oldsolabel);
2054 SOCK_UNLOCK(oldso);
2055
2056 dest = SLOT(newsolabel);
2057
2058 SOCK_LOCK(newso);
2059 lomac_copy_single(&source, dest);
2060 SOCK_UNLOCK(newso);
2061 }
2062
2063 static void
2064 lomac_socket_relabel(struct ucred *cred, struct socket *so,
2065 struct label *solabel, struct label *newlabel)
2066 {
2067 struct mac_lomac *source, *dest;
2068
2069 SOCK_LOCK_ASSERT(so);
2070
2071 source = SLOT(newlabel);
2072 dest = SLOT(solabel);
2073
2074 try_relabel(source, dest);
2075 }
2076
2077 static void
2078 lomac_socketpeer_set_from_mbuf(struct mbuf *m, struct label *mlabel,
2079 struct socket *so, struct label *sopeerlabel)
2080 {
2081 struct mac_lomac *source, *dest;
2082
2083 source = SLOT(mlabel);
2084 dest = SLOT(sopeerlabel);
2085
2086 SOCK_LOCK(so);
2087 lomac_copy_single(source, dest);
2088 SOCK_UNLOCK(so);
2089 }
2090
2091 static void
2092 lomac_socketpeer_set_from_socket(struct socket *oldso,
2093 struct label *oldsolabel, struct socket *newso,
2094 struct label *newsopeerlabel)
2095 {
2096 struct mac_lomac source, *dest;
2097
2098 SOCK_LOCK(oldso);
2099 source = *SLOT(oldsolabel);
2100 SOCK_UNLOCK(oldso);
2101
2102 dest = SLOT(newsopeerlabel);
2103
2104 SOCK_LOCK(newso);
2105 lomac_copy_single(&source, dest);
2106 SOCK_UNLOCK(newso);
2107 }
2108
2109 static void
2110 lomac_syncache_create(struct label *label, struct inpcb *inp)
2111 {
2112 struct mac_lomac *source, *dest;
2113
2114 source = SLOT(inp->inp_label);
2115 dest = SLOT(label);
2116 lomac_copy(source, dest);
2117 }
2118
2119 static void
2120 lomac_syncache_create_mbuf(struct label *sc_label, struct mbuf *m,
2121 struct label *mlabel)
2122 {
2123 struct mac_lomac *source, *dest;
2124
2125 source = SLOT(sc_label);
2126 dest = SLOT(mlabel);
2127 lomac_copy(source, dest);
2128 }
2129
2130 static int
2131 lomac_system_check_acct(struct ucred *cred, struct vnode *vp,
2132 struct label *vplabel)
2133 {
2134 struct mac_lomac *subj, *obj;
2135
2136 if (!lomac_enabled)
2137 return (0);
2138
2139 subj = SLOT(cred->cr_label);
2140 obj = SLOT(vplabel);
2141
2142 if (lomac_subject_privileged(subj))
2143 return (EPERM);
2144
2145 if (!lomac_high_single(obj))
2146 return (EACCES);
2147
2148 return (0);
2149 }
2150
2151 static int
2152 lomac_system_check_auditctl(struct ucred *cred, struct vnode *vp,
2153 struct label *vplabel)
2154 {
2155 struct mac_lomac *subj, *obj;
2156
2157 if (!lomac_enabled)
2158 return (0);
2159
2160 subj = SLOT(cred->cr_label);
2161 obj = SLOT(vplabel);
2162
2163 if (lomac_subject_privileged(subj))
2164 return (EPERM);
2165
2166 if (!lomac_high_single(obj))
2167 return (EACCES);
2168
2169 return (0);
2170 }
2171
2172 static int
2173 lomac_system_check_swapoff(struct ucred *cred, struct vnode *vp,
2174 struct label *vplabel)
2175 {
2176 struct mac_lomac *subj;
2177
2178 if (!lomac_enabled)
2179 return (0);
2180
2181 subj = SLOT(cred->cr_label);
2182
2183 if (lomac_subject_privileged(subj))
2184 return (EPERM);
2185
2186 return (0);
2187 }
2188
2189 static int
2190 lomac_system_check_swapon(struct ucred *cred, struct vnode *vp,
2191 struct label *vplabel)
2192 {
2193 struct mac_lomac *subj, *obj;
2194
2195 if (!lomac_enabled)
2196 return (0);
2197
2198 subj = SLOT(cred->cr_label);
2199 obj = SLOT(vplabel);
2200
2201 if (lomac_subject_privileged(subj))
2202 return (EPERM);
2203
2204 if (!lomac_high_single(obj))
2205 return (EACCES);
2206
2207 return (0);
2208 }
2209
2210 static int
2211 lomac_system_check_sysctl(struct ucred *cred, struct sysctl_oid *oidp,
2212 void *arg1, int arg2, struct sysctl_req *req)
2213 {
2214 struct mac_lomac *subj;
2215
2216 if (!lomac_enabled)
2217 return (0);
2218
2219 subj = SLOT(cred->cr_label);
2220
2221 /*
2222 * Treat sysctl variables without CTLFLAG_ANYBODY flag as lomac/high,
2223 * but also require privilege to change them.
2224 */
2225 if (req->newptr != NULL && (oidp->oid_kind & CTLFLAG_ANYBODY) == 0) {
2226 #ifdef notdef
2227 if (!lomac_subject_dominate_high(subj))
2228 return (EACCES);
2229 #endif
2230
2231 if (lomac_subject_privileged(subj))
2232 return (EPERM);
2233 }
2234
2235 return (0);
2236 }
2237
2238 static void
2239 lomac_thread_userret(struct thread *td)
2240 {
2241 struct proc *p = td->td_proc;
2242 struct mac_lomac_proc *subj = PSLOT(p->p_label);
2243 struct ucred *newcred, *oldcred;
2244 int dodrop;
2245
2246 mtx_lock(&subj->mtx);
2247 if (subj->mac_lomac.ml_flags & MAC_LOMAC_FLAG_UPDATE) {
2248 dodrop = 0;
2249 mtx_unlock(&subj->mtx);
2250 newcred = crget();
2251 PROC_LOCK(p);
2252 mtx_lock(&subj->mtx);
2253 /*
2254 * Check if we lost the race while allocating the cred.
2255 */
2256 if ((subj->mac_lomac.ml_flags & MAC_LOMAC_FLAG_UPDATE) == 0) {
2257 crfree(newcred);
2258 goto out;
2259 }
2260 oldcred = p->p_ucred;
2261 crcopy(newcred, oldcred);
2262 crhold(newcred);
2263 lomac_copy(&subj->mac_lomac, SLOT(newcred->cr_label));
2264 proc_set_cred(p, newcred);
2265 crfree(oldcred);
2266 dodrop = 1;
2267 out:
2268 mtx_unlock(&subj->mtx);
2269 PROC_UNLOCK(p);
2270 if (dodrop)
2271 mac_proc_vm_revoke(curthread);
2272 } else {
2273 mtx_unlock(&subj->mtx);
2274 }
2275 }
2276
2277 static int
2278 lomac_vnode_associate_extattr(struct mount *mp, struct label *mplabel,
2279 struct vnode *vp, struct label *vplabel)
2280 {
2281 struct mac_lomac ml_temp, *source, *dest;
2282 int buflen, error;
2283
2284 source = SLOT(mplabel);
2285 dest = SLOT(vplabel);
2286
2287 buflen = sizeof(ml_temp);
2288 bzero(&ml_temp, buflen);
2289
2290 error = vn_extattr_get(vp, IO_NODELOCKED, MAC_LOMAC_EXTATTR_NAMESPACE,
2291 MAC_LOMAC_EXTATTR_NAME, &buflen, (char *)&ml_temp, curthread);
2292 if (error == ENOATTR || error == EOPNOTSUPP) {
2293 /* Fall back to the mntlabel. */
2294 lomac_copy_single(source, dest);
2295 return (0);
2296 } else if (error)
2297 return (error);
2298
2299 if (buflen != sizeof(ml_temp)) {
2300 if (buflen != sizeof(ml_temp) - sizeof(ml_temp.ml_auxsingle)) {
2301 printf("lomac_vnode_associate_extattr: bad size %d\n",
2302 buflen);
2303 return (EPERM);
2304 }
2305 bzero(&ml_temp.ml_auxsingle, sizeof(ml_temp.ml_auxsingle));
2306 buflen = sizeof(ml_temp);
2307 (void)vn_extattr_set(vp, IO_NODELOCKED,
2308 MAC_LOMAC_EXTATTR_NAMESPACE, MAC_LOMAC_EXTATTR_NAME,
2309 buflen, (char *)&ml_temp, curthread);
2310 }
2311 if (lomac_valid(&ml_temp) != 0) {
2312 printf("lomac_vnode_associate_extattr: invalid\n");
2313 return (EPERM);
2314 }
2315 if ((ml_temp.ml_flags & MAC_LOMAC_FLAGS_BOTH) !=
2316 MAC_LOMAC_FLAG_SINGLE) {
2317 printf("lomac_vnode_associate_extattr: not single\n");
2318 return (EPERM);
2319 }
2320
2321 lomac_copy_single(&ml_temp, dest);
2322 return (0);
2323 }
2324
2325 static void
2326 lomac_vnode_associate_singlelabel(struct mount *mp, struct label *mplabel,
2327 struct vnode *vp, struct label *vplabel)
2328 {
2329 struct mac_lomac *source, *dest;
2330
2331 source = SLOT(mplabel);
2332 dest = SLOT(vplabel);
2333
2334 lomac_copy_single(source, dest);
2335 }
2336
2337 static int
2338 lomac_vnode_check_create(struct ucred *cred, struct vnode *dvp,
2339 struct label *dvplabel, struct componentname *cnp, struct vattr *vap)
2340 {
2341 struct mac_lomac *subj, *obj;
2342
2343 if (!lomac_enabled)
2344 return (0);
2345
2346 subj = SLOT(cred->cr_label);
2347 obj = SLOT(dvplabel);
2348
2349 if (!lomac_subject_dominate(subj, obj))
2350 return (EACCES);
2351 if (obj->ml_flags & MAC_LOMAC_FLAG_AUX &&
2352 !lomac_dominate_element(&subj->ml_single, &obj->ml_auxsingle))
2353 return (EACCES);
2354
2355 return (0);
2356 }
2357
2358 static int
2359 lomac_vnode_check_deleteacl(struct ucred *cred, struct vnode *vp,
2360 struct label *vplabel, acl_type_t type)
2361 {
2362 struct mac_lomac *subj, *obj;
2363
2364 if (!lomac_enabled)
2365 return (0);
2366
2367 subj = SLOT(cred->cr_label);
2368 obj = SLOT(vplabel);
2369
2370 if (!lomac_subject_dominate(subj, obj))
2371 return (EACCES);
2372
2373 return (0);
2374 }
2375
2376 static int
2377 lomac_vnode_check_link(struct ucred *cred, struct vnode *dvp,
2378 struct label *dvplabel, struct vnode *vp, struct label *vplabel,
2379 struct componentname *cnp)
2380 {
2381 struct mac_lomac *subj, *obj;
2382
2383 if (!lomac_enabled)
2384 return (0);
2385
2386 subj = SLOT(cred->cr_label);
2387 obj = SLOT(dvplabel);
2388
2389 if (!lomac_subject_dominate(subj, obj))
2390 return (EACCES);
2391
2392 obj = SLOT(vplabel);
2393
2394 if (!lomac_subject_dominate(subj, obj))
2395 return (EACCES);
2396
2397 return (0);
2398 }
2399
2400 static int
2401 lomac_vnode_check_mmap(struct ucred *cred, struct vnode *vp,
2402 struct label *vplabel, int prot, int flags)
2403 {
2404 struct mac_lomac *subj, *obj;
2405
2406 /*
2407 * Rely on the use of open()-time protections to handle
2408 * non-revocation cases.
2409 */
2410 if (!lomac_enabled)
2411 return (0);
2412
2413 subj = SLOT(cred->cr_label);
2414 obj = SLOT(vplabel);
2415
2416 if (((prot & VM_PROT_WRITE) != 0) && ((flags & MAP_SHARED) != 0)) {
2417 if (!lomac_subject_dominate(subj, obj))
2418 return (EACCES);
2419 }
2420 if (prot & (VM_PROT_READ | VM_PROT_EXECUTE)) {
2421 if (!lomac_dominate_single(obj, subj))
2422 return (maybe_demote(subj, obj, "mapping", "file", vp));
2423 }
2424
2425 return (0);
2426 }
2427
2428 static void
2429 lomac_vnode_check_mmap_downgrade(struct ucred *cred, struct vnode *vp,
2430 struct label *vplabel, /* XXX vm_prot_t */ int *prot)
2431 {
2432 struct mac_lomac *subj, *obj;
2433
2434 /*
2435 * Rely on the use of open()-time protections to handle
2436 * non-revocation cases.
2437 */
2438 if (!lomac_enabled || !revocation_enabled)
2439 return;
2440
2441 subj = SLOT(cred->cr_label);
2442 obj = SLOT(vplabel);
2443
2444 if (!lomac_subject_dominate(subj, obj))
2445 *prot &= ~VM_PROT_WRITE;
2446 }
2447
2448 static int
2449 lomac_vnode_check_open(struct ucred *cred, struct vnode *vp,
2450 struct label *vplabel, accmode_t accmode)
2451 {
2452 struct mac_lomac *subj, *obj;
2453
2454 if (!lomac_enabled)
2455 return (0);
2456
2457 subj = SLOT(cred->cr_label);
2458 obj = SLOT(vplabel);
2459
2460 /* XXX privilege override for admin? */
2461 if (accmode & VMODIFY_PERMS) {
2462 if (!lomac_subject_dominate(subj, obj))
2463 return (EACCES);
2464 }
2465
2466 return (0);
2467 }
2468
2469 static int
2470 lomac_vnode_check_read(struct ucred *active_cred, struct ucred *file_cred,
2471 struct vnode *vp, struct label *vplabel)
2472 {
2473 struct mac_lomac *subj, *obj;
2474
2475 if (!lomac_enabled || !revocation_enabled)
2476 return (0);
2477
2478 subj = SLOT(active_cred->cr_label);
2479 obj = SLOT(vplabel);
2480
2481 if (!lomac_dominate_single(obj, subj))
2482 return (maybe_demote(subj, obj, "reading", "file", vp));
2483
2484 return (0);
2485 }
2486
2487 static int
2488 lomac_vnode_check_relabel(struct ucred *cred, struct vnode *vp,
2489 struct label *vplabel, struct label *newlabel)
2490 {
2491 struct mac_lomac *old, *new, *subj;
2492 int error;
2493
2494 old = SLOT(vplabel);
2495 new = SLOT(newlabel);
2496 subj = SLOT(cred->cr_label);
2497
2498 /*
2499 * If there is a LOMAC label update for the vnode, it must be a
2500 * single label, with an optional explicit auxiliary single.
2501 */
2502 error = lomac_atmostflags(new,
2503 MAC_LOMAC_FLAG_SINGLE | MAC_LOMAC_FLAG_AUX);
2504 if (error)
2505 return (error);
2506
2507 /*
2508 * To perform a relabel of the vnode (LOMAC label or not), LOMAC must
2509 * authorize the relabel.
2510 */
2511 if (!lomac_single_in_range(old, subj))
2512 return (EPERM);
2513
2514 /*
2515 * If the LOMAC label is to be changed, authorize as appropriate.
2516 */
2517 if (new->ml_flags & MAC_LOMAC_FLAG_SINGLE) {
2518 /*
2519 * To change the LOMAC label on a vnode, the new vnode label
2520 * must be in the subject range.
2521 */
2522 if (!lomac_single_in_range(new, subj))
2523 return (EPERM);
2524
2525 /*
2526 * To change the LOMAC label on the vnode to be EQUAL, the
2527 * subject must have appropriate privilege.
2528 */
2529 if (lomac_contains_equal(new)) {
2530 error = lomac_subject_privileged(subj);
2531 if (error)
2532 return (error);
2533 }
2534 }
2535 if (new->ml_flags & MAC_LOMAC_FLAG_AUX) {
2536 /*
2537 * Fill in the missing parts from the previous label.
2538 */
2539 if ((new->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0)
2540 lomac_copy_single(subj, new);
2541
2542 /*
2543 * To change the auxiliary LOMAC label on a vnode, the new
2544 * vnode label must be in the subject range.
2545 */
2546 if (!lomac_auxsingle_in_range(new, subj))
2547 return (EPERM);
2548
2549 /*
2550 * To change the auxiliary LOMAC label on the vnode to be
2551 * EQUAL, the subject must have appropriate privilege.
2552 */
2553 if (lomac_contains_equal(new)) {
2554 error = lomac_subject_privileged(subj);
2555 if (error)
2556 return (error);
2557 }
2558 }
2559
2560 return (0);
2561 }
2562
2563 static int
2564 lomac_vnode_check_rename_from(struct ucred *cred, struct vnode *dvp,
2565 struct label *dvplabel, struct vnode *vp, struct label *vplabel,
2566 struct componentname *cnp)
2567 {
2568 struct mac_lomac *subj, *obj;
2569
2570 if (!lomac_enabled)
2571 return (0);
2572
2573 subj = SLOT(cred->cr_label);
2574 obj = SLOT(dvplabel);
2575
2576 if (!lomac_subject_dominate(subj, obj))
2577 return (EACCES);
2578
2579 obj = SLOT(vplabel);
2580
2581 if (!lomac_subject_dominate(subj, obj))
2582 return (EACCES);
2583
2584 return (0);
2585 }
2586
2587 static int
2588 lomac_vnode_check_rename_to(struct ucred *cred, struct vnode *dvp,
2589 struct label *dvplabel, struct vnode *vp, struct label *vplabel,
2590 int samedir, struct componentname *cnp)
2591 {
2592 struct mac_lomac *subj, *obj;
2593
2594 if (!lomac_enabled)
2595 return (0);
2596
2597 subj = SLOT(cred->cr_label);
2598 obj = SLOT(dvplabel);
2599
2600 if (!lomac_subject_dominate(subj, obj))
2601 return (EACCES);
2602
2603 if (vp != NULL) {
2604 obj = SLOT(vplabel);
2605
2606 if (!lomac_subject_dominate(subj, obj))
2607 return (EACCES);
2608 }
2609
2610 return (0);
2611 }
2612
2613 static int
2614 lomac_vnode_check_revoke(struct ucred *cred, struct vnode *vp,
2615 struct label *vplabel)
2616 {
2617 struct mac_lomac *subj, *obj;
2618
2619 if (!lomac_enabled)
2620 return (0);
2621
2622 subj = SLOT(cred->cr_label);
2623 obj = SLOT(vplabel);
2624
2625 if (!lomac_subject_dominate(subj, obj))
2626 return (EACCES);
2627
2628 return (0);
2629 }
2630
2631 static int
2632 lomac_vnode_check_setacl(struct ucred *cred, struct vnode *vp,
2633 struct label *vplabel, acl_type_t type, struct acl *acl)
2634 {
2635 struct mac_lomac *subj, *obj;
2636
2637 if (!lomac_enabled)
2638 return (0);
2639
2640 subj = SLOT(cred->cr_label);
2641 obj = SLOT(vplabel);
2642
2643 if (!lomac_subject_dominate(subj, obj))
2644 return (EACCES);
2645
2646 return (0);
2647 }
2648
2649 static int
2650 lomac_vnode_check_setextattr(struct ucred *cred, struct vnode *vp,
2651 struct label *vplabel, int attrnamespace, const char *name)
2652 {
2653 struct mac_lomac *subj, *obj;
2654
2655 if (!lomac_enabled)
2656 return (0);
2657
2658 subj = SLOT(cred->cr_label);
2659 obj = SLOT(vplabel);
2660
2661 if (!lomac_subject_dominate(subj, obj))
2662 return (EACCES);
2663
2664 /* XXX: protect the MAC EA in a special way? */
2665
2666 return (0);
2667 }
2668
2669 static int
2670 lomac_vnode_check_setflags(struct ucred *cred, struct vnode *vp,
2671 struct label *vplabel, u_long flags)
2672 {
2673 struct mac_lomac *subj, *obj;
2674
2675 if (!lomac_enabled)
2676 return (0);
2677
2678 subj = SLOT(cred->cr_label);
2679 obj = SLOT(vplabel);
2680
2681 if (!lomac_subject_dominate(subj, obj))
2682 return (EACCES);
2683
2684 return (0);
2685 }
2686
2687 static int
2688 lomac_vnode_check_setmode(struct ucred *cred, struct vnode *vp,
2689 struct label *vplabel, mode_t mode)
2690 {
2691 struct mac_lomac *subj, *obj;
2692
2693 if (!lomac_enabled)
2694 return (0);
2695
2696 subj = SLOT(cred->cr_label);
2697 obj = SLOT(vplabel);
2698
2699 if (!lomac_subject_dominate(subj, obj))
2700 return (EACCES);
2701
2702 return (0);
2703 }
2704
2705 static int
2706 lomac_vnode_check_setowner(struct ucred *cred, struct vnode *vp,
2707 struct label *vplabel, uid_t uid, gid_t gid)
2708 {
2709 struct mac_lomac *subj, *obj;
2710
2711 if (!lomac_enabled)
2712 return (0);
2713
2714 subj = SLOT(cred->cr_label);
2715 obj = SLOT(vplabel);
2716
2717 if (!lomac_subject_dominate(subj, obj))
2718 return (EACCES);
2719
2720 return (0);
2721 }
2722
2723 static int
2724 lomac_vnode_check_setutimes(struct ucred *cred, struct vnode *vp,
2725 struct label *vplabel, struct timespec atime, struct timespec mtime)
2726 {
2727 struct mac_lomac *subj, *obj;
2728
2729 if (!lomac_enabled)
2730 return (0);
2731
2732 subj = SLOT(cred->cr_label);
2733 obj = SLOT(vplabel);
2734
2735 if (!lomac_subject_dominate(subj, obj))
2736 return (EACCES);
2737
2738 return (0);
2739 }
2740
2741 static int
2742 lomac_vnode_check_unlink(struct ucred *cred, struct vnode *dvp,
2743 struct label *dvplabel, struct vnode *vp, struct label *vplabel,
2744 struct componentname *cnp)
2745 {
2746 struct mac_lomac *subj, *obj;
2747
2748 if (!lomac_enabled)
2749 return (0);
2750
2751 subj = SLOT(cred->cr_label);
2752 obj = SLOT(dvplabel);
2753
2754 if (!lomac_subject_dominate(subj, obj))
2755 return (EACCES);
2756
2757 obj = SLOT(vplabel);
2758
2759 if (!lomac_subject_dominate(subj, obj))
2760 return (EACCES);
2761
2762 return (0);
2763 }
2764
2765 static int
2766 lomac_vnode_check_write(struct ucred *active_cred,
2767 struct ucred *file_cred, struct vnode *vp, struct label *vplabel)
2768 {
2769 struct mac_lomac *subj, *obj;
2770
2771 if (!lomac_enabled || !revocation_enabled)
2772 return (0);
2773
2774 subj = SLOT(active_cred->cr_label);
2775 obj = SLOT(vplabel);
2776
2777 if (!lomac_subject_dominate(subj, obj))
2778 return (EACCES);
2779
2780 return (0);
2781 }
2782
2783 static int
2784 lomac_vnode_create_extattr(struct ucred *cred, struct mount *mp,
2785 struct label *mplabel, struct vnode *dvp, struct label *dvplabel,
2786 struct vnode *vp, struct label *vplabel, struct componentname *cnp)
2787 {
2788 struct mac_lomac *source, *dest, *dir, temp;
2789 size_t buflen;
2790 int error;
2791
2792 buflen = sizeof(temp);
2793 bzero(&temp, buflen);
2794
2795 source = SLOT(cred->cr_label);
2796 dest = SLOT(vplabel);
2797 dir = SLOT(dvplabel);
2798 if (dir->ml_flags & MAC_LOMAC_FLAG_AUX) {
2799 lomac_copy_auxsingle(dir, &temp);
2800 lomac_set_single(&temp, dir->ml_auxsingle.mle_type,
2801 dir->ml_auxsingle.mle_grade);
2802 } else {
2803 lomac_copy_single(source, &temp);
2804 }
2805
2806 error = vn_extattr_set(vp, IO_NODELOCKED, MAC_LOMAC_EXTATTR_NAMESPACE,
2807 MAC_LOMAC_EXTATTR_NAME, buflen, (char *)&temp, curthread);
2808 if (error == 0)
2809 lomac_copy(&temp, dest);
2810 return (error);
2811 }
2812
2813 static void
2814 lomac_vnode_execve_transition(struct ucred *old, struct ucred *new,
2815 struct vnode *vp, struct label *vplabel, struct label *interpvplabel,
2816 struct image_params *imgp, struct label *execlabel)
2817 {
2818 struct mac_lomac *source, *dest, *obj, *robj;
2819
2820 source = SLOT(old->cr_label);
2821 dest = SLOT(new->cr_label);
2822 obj = SLOT(vplabel);
2823 robj = interpvplabel != NULL ? SLOT(interpvplabel) : obj;
2824
2825 lomac_copy(source, dest);
2826 /*
2827 * If there's an auxiliary label on the real object, respect it and
2828 * assume that this level should be assumed immediately if a higher
2829 * level is currently in place.
2830 */
2831 if (robj->ml_flags & MAC_LOMAC_FLAG_AUX &&
2832 !lomac_dominate_element(&robj->ml_auxsingle, &dest->ml_single)
2833 && lomac_auxsingle_in_range(robj, dest))
2834 lomac_set_single(dest, robj->ml_auxsingle.mle_type,
2835 robj->ml_auxsingle.mle_grade);
2836 /*
2837 * Restructuring to use the execve transitioning mechanism instead of
2838 * the normal demotion mechanism here would be difficult, so just
2839 * copy the label over and perform standard demotion. This is also
2840 * non-optimal because it will result in the intermediate label "new"
2841 * being created and immediately recycled.
2842 */
2843 if (lomac_enabled && revocation_enabled &&
2844 !lomac_dominate_single(obj, source))
2845 (void)maybe_demote(source, obj, "executing", "file", vp);
2846 }
2847
2848 static int
2849 lomac_vnode_execve_will_transition(struct ucred *old, struct vnode *vp,
2850 struct label *vplabel, struct label *interpvplabel,
2851 struct image_params *imgp, struct label *execlabel)
2852 {
2853 struct mac_lomac *subj, *obj, *robj;
2854
2855 if (!lomac_enabled || !revocation_enabled)
2856 return (0);
2857
2858 subj = SLOT(old->cr_label);
2859 obj = SLOT(vplabel);
2860 robj = interpvplabel != NULL ? SLOT(interpvplabel) : obj;
2861
2862 return ((robj->ml_flags & MAC_LOMAC_FLAG_AUX &&
2863 !lomac_dominate_element(&robj->ml_auxsingle, &subj->ml_single)
2864 && lomac_auxsingle_in_range(robj, subj)) ||
2865 !lomac_dominate_single(obj, subj));
2866 }
2867
2868 static void
2869 lomac_vnode_relabel(struct ucred *cred, struct vnode *vp,
2870 struct label *vplabel, struct label *newlabel)
2871 {
2872 struct mac_lomac *source, *dest;
2873
2874 source = SLOT(newlabel);
2875 dest = SLOT(vplabel);
2876
2877 try_relabel(source, dest);
2878 }
2879
2880 static int
2881 lomac_vnode_setlabel_extattr(struct ucred *cred, struct vnode *vp,
2882 struct label *vplabel, struct label *intlabel)
2883 {
2884 struct mac_lomac *source, temp;
2885 size_t buflen;
2886 int error;
2887
2888 buflen = sizeof(temp);
2889 bzero(&temp, buflen);
2890
2891 source = SLOT(intlabel);
2892 if ((source->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0)
2893 return (0);
2894
2895 lomac_copy_single(source, &temp);
2896 error = vn_extattr_set(vp, IO_NODELOCKED, MAC_LOMAC_EXTATTR_NAMESPACE,
2897 MAC_LOMAC_EXTATTR_NAME, buflen, (char *)&temp, curthread);
2898 return (error);
2899 }
2900
2901 static struct mac_policy_ops lomac_ops =
2902 {
2903 .mpo_init = lomac_init,
2904 .mpo_destroy = lomac_fini,
2905
2906 .mpo_bpfdesc_check_receive = lomac_bpfdesc_check_receive,
2907 .mpo_bpfdesc_create = lomac_bpfdesc_create,
2908 .mpo_bpfdesc_create_mbuf = lomac_bpfdesc_create_mbuf,
2909 .mpo_bpfdesc_destroy_label = lomac_destroy_label,
2910 .mpo_bpfdesc_init_label = lomac_init_label,
2911
2912 .mpo_cred_check_relabel = lomac_cred_check_relabel,
2913 .mpo_cred_check_visible = lomac_cred_check_visible,
2914 .mpo_cred_copy_label = lomac_copy_label,
2915 .mpo_cred_create_swapper = lomac_cred_create_swapper,
2916 .mpo_cred_create_init = lomac_cred_create_init,
2917 .mpo_cred_destroy_label = lomac_destroy_label,
2918 .mpo_cred_externalize_label = lomac_externalize_label,
2919 .mpo_cred_init_label = lomac_init_label,
2920 .mpo_cred_internalize_label = lomac_internalize_label,
2921 .mpo_cred_relabel = lomac_cred_relabel,
2922
2923 .mpo_devfs_create_device = lomac_devfs_create_device,
2924 .mpo_devfs_create_directory = lomac_devfs_create_directory,
2925 .mpo_devfs_create_symlink = lomac_devfs_create_symlink,
2926 .mpo_devfs_destroy_label = lomac_destroy_label,
2927 .mpo_devfs_init_label = lomac_init_label,
2928 .mpo_devfs_update = lomac_devfs_update,
2929 .mpo_devfs_vnode_associate = lomac_devfs_vnode_associate,
2930
2931 .mpo_ifnet_check_relabel = lomac_ifnet_check_relabel,
2932 .mpo_ifnet_check_transmit = lomac_ifnet_check_transmit,
2933 .mpo_ifnet_copy_label = lomac_copy_label,
2934 .mpo_ifnet_create = lomac_ifnet_create,
2935 .mpo_ifnet_create_mbuf = lomac_ifnet_create_mbuf,
2936 .mpo_ifnet_destroy_label = lomac_destroy_label,
2937 .mpo_ifnet_externalize_label = lomac_externalize_label,
2938 .mpo_ifnet_init_label = lomac_init_label,
2939 .mpo_ifnet_internalize_label = lomac_internalize_label,
2940 .mpo_ifnet_relabel = lomac_ifnet_relabel,
2941
2942 .mpo_syncache_create = lomac_syncache_create,
2943 .mpo_syncache_destroy_label = lomac_destroy_label,
2944 .mpo_syncache_init_label = lomac_init_label_waitcheck,
2945
2946 .mpo_inpcb_check_deliver = lomac_inpcb_check_deliver,
2947 .mpo_inpcb_check_visible = lomac_inpcb_check_visible,
2948 .mpo_inpcb_create = lomac_inpcb_create,
2949 .mpo_inpcb_create_mbuf = lomac_inpcb_create_mbuf,
2950 .mpo_inpcb_destroy_label = lomac_destroy_label,
2951 .mpo_inpcb_init_label = lomac_init_label_waitcheck,
2952 .mpo_inpcb_sosetlabel = lomac_inpcb_sosetlabel,
2953
2954 .mpo_ip6q_create = lomac_ip6q_create,
2955 .mpo_ip6q_destroy_label = lomac_destroy_label,
2956 .mpo_ip6q_init_label = lomac_init_label_waitcheck,
2957 .mpo_ip6q_match = lomac_ip6q_match,
2958 .mpo_ip6q_reassemble = lomac_ip6q_reassemble,
2959 .mpo_ip6q_update = lomac_ip6q_update,
2960
2961 .mpo_ipq_create = lomac_ipq_create,
2962 .mpo_ipq_destroy_label = lomac_destroy_label,
2963 .mpo_ipq_init_label = lomac_init_label_waitcheck,
2964 .mpo_ipq_match = lomac_ipq_match,
2965 .mpo_ipq_reassemble = lomac_ipq_reassemble,
2966 .mpo_ipq_update = lomac_ipq_update,
2967
2968 .mpo_kld_check_load = lomac_kld_check_load,
2969
2970 .mpo_mbuf_copy_label = lomac_copy_label,
2971 .mpo_mbuf_destroy_label = lomac_destroy_label,
2972 .mpo_mbuf_init_label = lomac_init_label_waitcheck,
2973
2974 .mpo_mount_create = lomac_mount_create,
2975 .mpo_mount_destroy_label = lomac_destroy_label,
2976 .mpo_mount_init_label = lomac_init_label,
2977
2978 .mpo_netinet_arp_send = lomac_netinet_arp_send,
2979 .mpo_netinet_firewall_reply = lomac_netinet_firewall_reply,
2980 .mpo_netinet_firewall_send = lomac_netinet_firewall_send,
2981 .mpo_netinet_fragment = lomac_netinet_fragment,
2982 .mpo_netinet_icmp_reply = lomac_netinet_icmp_reply,
2983 .mpo_netinet_igmp_send = lomac_netinet_igmp_send,
2984
2985 .mpo_netinet6_nd6_send = lomac_netinet6_nd6_send,
2986
2987 .mpo_pipe_check_ioctl = lomac_pipe_check_ioctl,
2988 .mpo_pipe_check_read = lomac_pipe_check_read,
2989 .mpo_pipe_check_relabel = lomac_pipe_check_relabel,
2990 .mpo_pipe_check_write = lomac_pipe_check_write,
2991 .mpo_pipe_copy_label = lomac_copy_label,
2992 .mpo_pipe_create = lomac_pipe_create,
2993 .mpo_pipe_destroy_label = lomac_destroy_label,
2994 .mpo_pipe_externalize_label = lomac_externalize_label,
2995 .mpo_pipe_init_label = lomac_init_label,
2996 .mpo_pipe_internalize_label = lomac_internalize_label,
2997 .mpo_pipe_relabel = lomac_pipe_relabel,
2998
2999 .mpo_priv_check = lomac_priv_check,
3000
3001 .mpo_proc_check_debug = lomac_proc_check_debug,
3002 .mpo_proc_check_sched = lomac_proc_check_sched,
3003 .mpo_proc_check_signal = lomac_proc_check_signal,
3004 .mpo_proc_destroy_label = lomac_proc_destroy_label,
3005 .mpo_proc_init_label = lomac_proc_init_label,
3006
3007 .mpo_socket_check_deliver = lomac_socket_check_deliver,
3008 .mpo_socket_check_relabel = lomac_socket_check_relabel,
3009 .mpo_socket_check_visible = lomac_socket_check_visible,
3010 .mpo_socket_copy_label = lomac_copy_label,
3011 .mpo_socket_create = lomac_socket_create,
3012 .mpo_socket_create_mbuf = lomac_socket_create_mbuf,
3013 .mpo_socket_destroy_label = lomac_destroy_label,
3014 .mpo_socket_externalize_label = lomac_externalize_label,
3015 .mpo_socket_init_label = lomac_init_label_waitcheck,
3016 .mpo_socket_internalize_label = lomac_internalize_label,
3017 .mpo_socket_newconn = lomac_socket_newconn,
3018 .mpo_socket_relabel = lomac_socket_relabel,
3019
3020 .mpo_socketpeer_destroy_label = lomac_destroy_label,
3021 .mpo_socketpeer_externalize_label = lomac_externalize_label,
3022 .mpo_socketpeer_init_label = lomac_init_label_waitcheck,
3023 .mpo_socketpeer_set_from_mbuf = lomac_socketpeer_set_from_mbuf,
3024 .mpo_socketpeer_set_from_socket = lomac_socketpeer_set_from_socket,
3025
3026 .mpo_syncache_create_mbuf = lomac_syncache_create_mbuf,
3027
3028 .mpo_system_check_acct = lomac_system_check_acct,
3029 .mpo_system_check_auditctl = lomac_system_check_auditctl,
3030 .mpo_system_check_swapoff = lomac_system_check_swapoff,
3031 .mpo_system_check_swapon = lomac_system_check_swapon,
3032 .mpo_system_check_sysctl = lomac_system_check_sysctl,
3033
3034 .mpo_thread_userret = lomac_thread_userret,
3035
3036 .mpo_vnode_associate_extattr = lomac_vnode_associate_extattr,
3037 .mpo_vnode_associate_singlelabel = lomac_vnode_associate_singlelabel,
3038 .mpo_vnode_check_access = lomac_vnode_check_open,
3039 .mpo_vnode_check_create = lomac_vnode_check_create,
3040 .mpo_vnode_check_deleteacl = lomac_vnode_check_deleteacl,
3041 .mpo_vnode_check_link = lomac_vnode_check_link,
3042 .mpo_vnode_check_mmap = lomac_vnode_check_mmap,
3043 .mpo_vnode_check_mmap_downgrade = lomac_vnode_check_mmap_downgrade,
3044 .mpo_vnode_check_open = lomac_vnode_check_open,
3045 .mpo_vnode_check_read = lomac_vnode_check_read,
3046 .mpo_vnode_check_relabel = lomac_vnode_check_relabel,
3047 .mpo_vnode_check_rename_from = lomac_vnode_check_rename_from,
3048 .mpo_vnode_check_rename_to = lomac_vnode_check_rename_to,
3049 .mpo_vnode_check_revoke = lomac_vnode_check_revoke,
3050 .mpo_vnode_check_setacl = lomac_vnode_check_setacl,
3051 .mpo_vnode_check_setextattr = lomac_vnode_check_setextattr,
3052 .mpo_vnode_check_setflags = lomac_vnode_check_setflags,
3053 .mpo_vnode_check_setmode = lomac_vnode_check_setmode,
3054 .mpo_vnode_check_setowner = lomac_vnode_check_setowner,
3055 .mpo_vnode_check_setutimes = lomac_vnode_check_setutimes,
3056 .mpo_vnode_check_unlink = lomac_vnode_check_unlink,
3057 .mpo_vnode_check_write = lomac_vnode_check_write,
3058 .mpo_vnode_copy_label = lomac_copy_label,
3059 .mpo_vnode_create_extattr = lomac_vnode_create_extattr,
3060 .mpo_vnode_destroy_label = lomac_destroy_label,
3061 .mpo_vnode_execve_transition = lomac_vnode_execve_transition,
3062 .mpo_vnode_execve_will_transition = lomac_vnode_execve_will_transition,
3063 .mpo_vnode_externalize_label = lomac_externalize_label,
3064 .mpo_vnode_init_label = lomac_init_label,
3065 .mpo_vnode_internalize_label = lomac_internalize_label,
3066 .mpo_vnode_relabel = lomac_vnode_relabel,
3067 .mpo_vnode_setlabel_extattr = lomac_vnode_setlabel_extattr,
3068 };
3069
3070 MAC_POLICY_SET(&lomac_ops, mac_lomac, "TrustedBSD MAC/LOMAC",
3071 MPC_LOADTIME_FLAG_NOTLATE, &lomac_slot);
Cache object: 89654b8302592390af92a1de5839c4a4
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