1 /*-
2 * Copyright (c) 1999-2002, 2007-2011 Robert N. M. Watson
3 * Copyright (c) 2001-2005 McAfee, 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 McAfee
10 * Research, the Security Research Division of McAfee, 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 * This software was developed at the University of Cambridge Computer
18 * Laboratory with support from a grant from Google, Inc.
19 *
20 * Redistribution and use in source and binary forms, with or without
21 * modification, are permitted provided that the following conditions
22 * are met:
23 * 1. Redistributions of source code must retain the above copyright
24 * notice, this list of conditions and the following disclaimer.
25 * 2. Redistributions in binary form must reproduce the above copyright
26 * notice, this list of conditions and the following disclaimer in the
27 * documentation and/or other materials provided with the distribution.
28 *
29 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
30 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
31 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
32 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
33 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
34 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
35 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
36 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
37 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
38 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
39 * SUCH DAMAGE.
40 *
41 * $FreeBSD: releng/11.0/sys/security/mac_biba/mac_biba.c 267992 2014-06-28 03:56:17Z hselasky $
42 */
43
44 /*
45 * Developed by the TrustedBSD Project.
46 *
47 * Biba fixed label mandatory integrity policy.
48 */
49
50 #include <sys/param.h>
51 #include <sys/conf.h>
52 #include <sys/extattr.h>
53 #include <sys/kernel.h>
54 #include <sys/ksem.h>
55 #include <sys/malloc.h>
56 #include <sys/mman.h>
57 #include <sys/mount.h>
58 #include <sys/priv.h>
59 #include <sys/proc.h>
60 #include <sys/sbuf.h>
61 #include <sys/systm.h>
62 #include <sys/sysproto.h>
63 #include <sys/sysent.h>
64 #include <sys/systm.h>
65 #include <sys/vnode.h>
66 #include <sys/file.h>
67 #include <sys/socket.h>
68 #include <sys/socketvar.h>
69 #include <sys/pipe.h>
70 #include <sys/sx.h>
71 #include <sys/sysctl.h>
72 #include <sys/msg.h>
73 #include <sys/sem.h>
74 #include <sys/shm.h>
75
76 #include <fs/devfs/devfs.h>
77
78 #include <net/bpfdesc.h>
79 #include <net/if.h>
80 #include <net/if_types.h>
81 #include <net/if_var.h>
82
83 #include <netinet/in.h>
84 #include <netinet/in_pcb.h>
85 #include <netinet/ip_var.h>
86
87 #include <vm/uma.h>
88 #include <vm/vm.h>
89
90 #include <security/mac/mac_policy.h>
91 #include <security/mac_biba/mac_biba.h>
92
93 SYSCTL_DECL(_security_mac);
94
95 static SYSCTL_NODE(_security_mac, OID_AUTO, biba, CTLFLAG_RW, 0,
96 "TrustedBSD mac_biba policy controls");
97
98 static int biba_label_size = sizeof(struct mac_biba);
99 SYSCTL_INT(_security_mac_biba, OID_AUTO, label_size, CTLFLAG_RD,
100 &biba_label_size, 0, "Size of struct mac_biba");
101
102 static int biba_enabled = 1;
103 SYSCTL_INT(_security_mac_biba, OID_AUTO, enabled, CTLFLAG_RWTUN, &biba_enabled,
104 0, "Enforce MAC/Biba policy");
105
106 static int destroyed_not_inited;
107 SYSCTL_INT(_security_mac_biba, OID_AUTO, destroyed_not_inited, CTLFLAG_RD,
108 &destroyed_not_inited, 0, "Count of labels destroyed but not inited");
109
110 static int trust_all_interfaces = 0;
111 SYSCTL_INT(_security_mac_biba, OID_AUTO, trust_all_interfaces, CTLFLAG_RDTUN,
112 &trust_all_interfaces, 0, "Consider all interfaces 'trusted' by MAC/Biba");
113
114 static char trusted_interfaces[128];
115 SYSCTL_STRING(_security_mac_biba, OID_AUTO, trusted_interfaces, CTLFLAG_RDTUN,
116 trusted_interfaces, 0, "Interfaces considered 'trusted' by MAC/Biba");
117
118 static int max_compartments = MAC_BIBA_MAX_COMPARTMENTS;
119 SYSCTL_INT(_security_mac_biba, OID_AUTO, max_compartments, CTLFLAG_RD,
120 &max_compartments, 0, "Maximum supported compartments");
121
122 static int ptys_equal = 0;
123 SYSCTL_INT(_security_mac_biba, OID_AUTO, ptys_equal, CTLFLAG_RWTUN, &ptys_equal,
124 0, "Label pty devices as biba/equal on create");
125
126 static int interfaces_equal = 1;
127 SYSCTL_INT(_security_mac_biba, OID_AUTO, interfaces_equal, CTLFLAG_RWTUN,
128 &interfaces_equal, 0, "Label network interfaces as biba/equal on create");
129
130 static int revocation_enabled = 0;
131 SYSCTL_INT(_security_mac_biba, OID_AUTO, revocation_enabled, CTLFLAG_RWTUN,
132 &revocation_enabled, 0, "Revoke access to objects on relabel");
133
134 static int biba_slot;
135 #define SLOT(l) ((struct mac_biba *)mac_label_get((l), biba_slot))
136 #define SLOT_SET(l, val) mac_label_set((l), biba_slot, (uintptr_t)(val))
137
138 static uma_zone_t zone_biba;
139
140 static __inline int
141 biba_bit_set_empty(u_char *set) {
142 int i;
143
144 for (i = 0; i < MAC_BIBA_MAX_COMPARTMENTS >> 3; i++)
145 if (set[i] != 0)
146 return (0);
147 return (1);
148 }
149
150 static struct mac_biba *
151 biba_alloc(int flag)
152 {
153
154 return (uma_zalloc(zone_biba, flag | M_ZERO));
155 }
156
157 static void
158 biba_free(struct mac_biba *mb)
159 {
160
161 if (mb != NULL)
162 uma_zfree(zone_biba, mb);
163 else
164 atomic_add_int(&destroyed_not_inited, 1);
165 }
166
167 static int
168 biba_atmostflags(struct mac_biba *mb, int flags)
169 {
170
171 if ((mb->mb_flags & flags) != mb->mb_flags)
172 return (EINVAL);
173 return (0);
174 }
175
176 static int
177 biba_dominate_element(struct mac_biba_element *a, struct mac_biba_element *b)
178 {
179 int bit;
180
181 switch (a->mbe_type) {
182 case MAC_BIBA_TYPE_EQUAL:
183 case MAC_BIBA_TYPE_HIGH:
184 return (1);
185
186 case MAC_BIBA_TYPE_LOW:
187 switch (b->mbe_type) {
188 case MAC_BIBA_TYPE_GRADE:
189 case MAC_BIBA_TYPE_HIGH:
190 return (0);
191
192 case MAC_BIBA_TYPE_EQUAL:
193 case MAC_BIBA_TYPE_LOW:
194 return (1);
195
196 default:
197 panic("biba_dominate_element: b->mbe_type invalid");
198 }
199
200 case MAC_BIBA_TYPE_GRADE:
201 switch (b->mbe_type) {
202 case MAC_BIBA_TYPE_EQUAL:
203 case MAC_BIBA_TYPE_LOW:
204 return (1);
205
206 case MAC_BIBA_TYPE_HIGH:
207 return (0);
208
209 case MAC_BIBA_TYPE_GRADE:
210 for (bit = 1; bit <= MAC_BIBA_MAX_COMPARTMENTS; bit++)
211 if (!MAC_BIBA_BIT_TEST(bit,
212 a->mbe_compartments) &&
213 MAC_BIBA_BIT_TEST(bit, b->mbe_compartments))
214 return (0);
215 return (a->mbe_grade >= b->mbe_grade);
216
217 default:
218 panic("biba_dominate_element: b->mbe_type invalid");
219 }
220
221 default:
222 panic("biba_dominate_element: a->mbe_type invalid");
223 }
224
225 return (0);
226 }
227
228 static int
229 biba_subject_dominate_high(struct mac_biba *mb)
230 {
231 struct mac_biba_element *element;
232
233 KASSERT((mb->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) != 0,
234 ("biba_effective_in_range: mb not effective"));
235 element = &mb->mb_effective;
236
237 return (element->mbe_type == MAC_BIBA_TYPE_EQUAL ||
238 element->mbe_type == MAC_BIBA_TYPE_HIGH);
239 }
240
241 static int
242 biba_range_in_range(struct mac_biba *rangea, struct mac_biba *rangeb)
243 {
244
245 return (biba_dominate_element(&rangeb->mb_rangehigh,
246 &rangea->mb_rangehigh) &&
247 biba_dominate_element(&rangea->mb_rangelow,
248 &rangeb->mb_rangelow));
249 }
250
251 static int
252 biba_effective_in_range(struct mac_biba *effective, struct mac_biba *range)
253 {
254
255 KASSERT((effective->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) != 0,
256 ("biba_effective_in_range: a not effective"));
257 KASSERT((range->mb_flags & MAC_BIBA_FLAG_RANGE) != 0,
258 ("biba_effective_in_range: b not range"));
259
260 return (biba_dominate_element(&range->mb_rangehigh,
261 &effective->mb_effective) &&
262 biba_dominate_element(&effective->mb_effective,
263 &range->mb_rangelow));
264
265 return (1);
266 }
267
268 static int
269 biba_dominate_effective(struct mac_biba *a, struct mac_biba *b)
270 {
271 KASSERT((a->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) != 0,
272 ("biba_dominate_effective: a not effective"));
273 KASSERT((b->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) != 0,
274 ("biba_dominate_effective: b not effective"));
275
276 return (biba_dominate_element(&a->mb_effective, &b->mb_effective));
277 }
278
279 static int
280 biba_equal_element(struct mac_biba_element *a, struct mac_biba_element *b)
281 {
282
283 if (a->mbe_type == MAC_BIBA_TYPE_EQUAL ||
284 b->mbe_type == MAC_BIBA_TYPE_EQUAL)
285 return (1);
286
287 return (a->mbe_type == b->mbe_type && a->mbe_grade == b->mbe_grade);
288 }
289
290 static int
291 biba_equal_effective(struct mac_biba *a, struct mac_biba *b)
292 {
293
294 KASSERT((a->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) != 0,
295 ("biba_equal_effective: a not effective"));
296 KASSERT((b->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) != 0,
297 ("biba_equal_effective: b not effective"));
298
299 return (biba_equal_element(&a->mb_effective, &b->mb_effective));
300 }
301
302 static int
303 biba_contains_equal(struct mac_biba *mb)
304 {
305
306 if (mb->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) {
307 if (mb->mb_effective.mbe_type == MAC_BIBA_TYPE_EQUAL)
308 return (1);
309 }
310
311 if (mb->mb_flags & MAC_BIBA_FLAG_RANGE) {
312 if (mb->mb_rangelow.mbe_type == MAC_BIBA_TYPE_EQUAL)
313 return (1);
314 if (mb->mb_rangehigh.mbe_type == MAC_BIBA_TYPE_EQUAL)
315 return (1);
316 }
317
318 return (0);
319 }
320
321 static int
322 biba_subject_privileged(struct mac_biba *mb)
323 {
324
325 KASSERT((mb->mb_flags & MAC_BIBA_FLAGS_BOTH) == MAC_BIBA_FLAGS_BOTH,
326 ("biba_subject_privileged: subject doesn't have both labels"));
327
328 /* If the effective is EQUAL, it's ok. */
329 if (mb->mb_effective.mbe_type == MAC_BIBA_TYPE_EQUAL)
330 return (0);
331
332 /* If either range endpoint is EQUAL, it's ok. */
333 if (mb->mb_rangelow.mbe_type == MAC_BIBA_TYPE_EQUAL ||
334 mb->mb_rangehigh.mbe_type == MAC_BIBA_TYPE_EQUAL)
335 return (0);
336
337 /* If the range is low-high, it's ok. */
338 if (mb->mb_rangelow.mbe_type == MAC_BIBA_TYPE_LOW &&
339 mb->mb_rangehigh.mbe_type == MAC_BIBA_TYPE_HIGH)
340 return (0);
341
342 /* It's not ok. */
343 return (EPERM);
344 }
345
346 static int
347 biba_high_effective(struct mac_biba *mb)
348 {
349
350 KASSERT((mb->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) != 0,
351 ("biba_equal_effective: mb not effective"));
352
353 return (mb->mb_effective.mbe_type == MAC_BIBA_TYPE_HIGH);
354 }
355
356 static int
357 biba_valid(struct mac_biba *mb)
358 {
359
360 if (mb->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) {
361 switch (mb->mb_effective.mbe_type) {
362 case MAC_BIBA_TYPE_GRADE:
363 break;
364
365 case MAC_BIBA_TYPE_EQUAL:
366 case MAC_BIBA_TYPE_HIGH:
367 case MAC_BIBA_TYPE_LOW:
368 if (mb->mb_effective.mbe_grade != 0 ||
369 !MAC_BIBA_BIT_SET_EMPTY(
370 mb->mb_effective.mbe_compartments))
371 return (EINVAL);
372 break;
373
374 default:
375 return (EINVAL);
376 }
377 } else {
378 if (mb->mb_effective.mbe_type != MAC_BIBA_TYPE_UNDEF)
379 return (EINVAL);
380 }
381
382 if (mb->mb_flags & MAC_BIBA_FLAG_RANGE) {
383 switch (mb->mb_rangelow.mbe_type) {
384 case MAC_BIBA_TYPE_GRADE:
385 break;
386
387 case MAC_BIBA_TYPE_EQUAL:
388 case MAC_BIBA_TYPE_HIGH:
389 case MAC_BIBA_TYPE_LOW:
390 if (mb->mb_rangelow.mbe_grade != 0 ||
391 !MAC_BIBA_BIT_SET_EMPTY(
392 mb->mb_rangelow.mbe_compartments))
393 return (EINVAL);
394 break;
395
396 default:
397 return (EINVAL);
398 }
399
400 switch (mb->mb_rangehigh.mbe_type) {
401 case MAC_BIBA_TYPE_GRADE:
402 break;
403
404 case MAC_BIBA_TYPE_EQUAL:
405 case MAC_BIBA_TYPE_HIGH:
406 case MAC_BIBA_TYPE_LOW:
407 if (mb->mb_rangehigh.mbe_grade != 0 ||
408 !MAC_BIBA_BIT_SET_EMPTY(
409 mb->mb_rangehigh.mbe_compartments))
410 return (EINVAL);
411 break;
412
413 default:
414 return (EINVAL);
415 }
416 if (!biba_dominate_element(&mb->mb_rangehigh,
417 &mb->mb_rangelow))
418 return (EINVAL);
419 } else {
420 if (mb->mb_rangelow.mbe_type != MAC_BIBA_TYPE_UNDEF ||
421 mb->mb_rangehigh.mbe_type != MAC_BIBA_TYPE_UNDEF)
422 return (EINVAL);
423 }
424
425 return (0);
426 }
427
428 static void
429 biba_set_range(struct mac_biba *mb, u_short typelow, u_short gradelow,
430 u_char *compartmentslow, u_short typehigh, u_short gradehigh,
431 u_char *compartmentshigh)
432 {
433
434 mb->mb_rangelow.mbe_type = typelow;
435 mb->mb_rangelow.mbe_grade = gradelow;
436 if (compartmentslow != NULL)
437 memcpy(mb->mb_rangelow.mbe_compartments, compartmentslow,
438 sizeof(mb->mb_rangelow.mbe_compartments));
439 mb->mb_rangehigh.mbe_type = typehigh;
440 mb->mb_rangehigh.mbe_grade = gradehigh;
441 if (compartmentshigh != NULL)
442 memcpy(mb->mb_rangehigh.mbe_compartments, compartmentshigh,
443 sizeof(mb->mb_rangehigh.mbe_compartments));
444 mb->mb_flags |= MAC_BIBA_FLAG_RANGE;
445 }
446
447 static void
448 biba_set_effective(struct mac_biba *mb, u_short type, u_short grade,
449 u_char *compartments)
450 {
451
452 mb->mb_effective.mbe_type = type;
453 mb->mb_effective.mbe_grade = grade;
454 if (compartments != NULL)
455 memcpy(mb->mb_effective.mbe_compartments, compartments,
456 sizeof(mb->mb_effective.mbe_compartments));
457 mb->mb_flags |= MAC_BIBA_FLAG_EFFECTIVE;
458 }
459
460 static void
461 biba_copy_range(struct mac_biba *labelfrom, struct mac_biba *labelto)
462 {
463
464 KASSERT((labelfrom->mb_flags & MAC_BIBA_FLAG_RANGE) != 0,
465 ("biba_copy_range: labelfrom not range"));
466
467 labelto->mb_rangelow = labelfrom->mb_rangelow;
468 labelto->mb_rangehigh = labelfrom->mb_rangehigh;
469 labelto->mb_flags |= MAC_BIBA_FLAG_RANGE;
470 }
471
472 static void
473 biba_copy_effective(struct mac_biba *labelfrom, struct mac_biba *labelto)
474 {
475
476 KASSERT((labelfrom->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) != 0,
477 ("biba_copy_effective: labelfrom not effective"));
478
479 labelto->mb_effective = labelfrom->mb_effective;
480 labelto->mb_flags |= MAC_BIBA_FLAG_EFFECTIVE;
481 }
482
483 static void
484 biba_copy(struct mac_biba *source, struct mac_biba *dest)
485 {
486
487 if (source->mb_flags & MAC_BIBA_FLAG_EFFECTIVE)
488 biba_copy_effective(source, dest);
489 if (source->mb_flags & MAC_BIBA_FLAG_RANGE)
490 biba_copy_range(source, dest);
491 }
492
493 /*
494 * Policy module operations.
495 */
496 static void
497 biba_init(struct mac_policy_conf *conf)
498 {
499
500 zone_biba = uma_zcreate("mac_biba", sizeof(struct mac_biba), NULL,
501 NULL, NULL, NULL, UMA_ALIGN_PTR, 0);
502 }
503
504 /*
505 * Label operations.
506 */
507 static void
508 biba_init_label(struct label *label)
509 {
510
511 SLOT_SET(label, biba_alloc(M_WAITOK));
512 }
513
514 static int
515 biba_init_label_waitcheck(struct label *label, int flag)
516 {
517
518 SLOT_SET(label, biba_alloc(flag));
519 if (SLOT(label) == NULL)
520 return (ENOMEM);
521
522 return (0);
523 }
524
525 static void
526 biba_destroy_label(struct label *label)
527 {
528
529 biba_free(SLOT(label));
530 SLOT_SET(label, NULL);
531 }
532
533 /*
534 * biba_element_to_string() accepts an sbuf and Biba element. It converts
535 * the Biba element to a string and stores the result in the sbuf; if there
536 * isn't space in the sbuf, -1 is returned.
537 */
538 static int
539 biba_element_to_string(struct sbuf *sb, struct mac_biba_element *element)
540 {
541 int i, first;
542
543 switch (element->mbe_type) {
544 case MAC_BIBA_TYPE_HIGH:
545 return (sbuf_printf(sb, "high"));
546
547 case MAC_BIBA_TYPE_LOW:
548 return (sbuf_printf(sb, "low"));
549
550 case MAC_BIBA_TYPE_EQUAL:
551 return (sbuf_printf(sb, "equal"));
552
553 case MAC_BIBA_TYPE_GRADE:
554 if (sbuf_printf(sb, "%d", element->mbe_grade) == -1)
555 return (-1);
556
557 first = 1;
558 for (i = 1; i <= MAC_BIBA_MAX_COMPARTMENTS; i++) {
559 if (MAC_BIBA_BIT_TEST(i, element->mbe_compartments)) {
560 if (first) {
561 if (sbuf_putc(sb, ':') == -1)
562 return (-1);
563 if (sbuf_printf(sb, "%d", i) == -1)
564 return (-1);
565 first = 0;
566 } else {
567 if (sbuf_printf(sb, "+%d", i) == -1)
568 return (-1);
569 }
570 }
571 }
572 return (0);
573
574 default:
575 panic("biba_element_to_string: invalid type (%d)",
576 element->mbe_type);
577 }
578 }
579
580 /*
581 * biba_to_string() converts a Biba label to a string, and places the results
582 * in the passed sbuf. It returns 0 on success, or EINVAL if there isn't
583 * room in the sbuf. Note: the sbuf will be modified even in a failure case,
584 * so the caller may need to revert the sbuf by restoring the offset if
585 * that's undesired.
586 */
587 static int
588 biba_to_string(struct sbuf *sb, struct mac_biba *mb)
589 {
590
591 if (mb->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) {
592 if (biba_element_to_string(sb, &mb->mb_effective) == -1)
593 return (EINVAL);
594 }
595
596 if (mb->mb_flags & MAC_BIBA_FLAG_RANGE) {
597 if (sbuf_putc(sb, '(') == -1)
598 return (EINVAL);
599
600 if (biba_element_to_string(sb, &mb->mb_rangelow) == -1)
601 return (EINVAL);
602
603 if (sbuf_putc(sb, '-') == -1)
604 return (EINVAL);
605
606 if (biba_element_to_string(sb, &mb->mb_rangehigh) == -1)
607 return (EINVAL);
608
609 if (sbuf_putc(sb, ')') == -1)
610 return (EINVAL);
611 }
612
613 return (0);
614 }
615
616 static int
617 biba_externalize_label(struct label *label, char *element_name,
618 struct sbuf *sb, int *claimed)
619 {
620 struct mac_biba *mb;
621
622 if (strcmp(MAC_BIBA_LABEL_NAME, element_name) != 0)
623 return (0);
624
625 (*claimed)++;
626
627 mb = SLOT(label);
628 return (biba_to_string(sb, mb));
629 }
630
631 static int
632 biba_parse_element(struct mac_biba_element *element, char *string)
633 {
634 char *compartment, *end, *grade;
635 int value;
636
637 if (strcmp(string, "high") == 0 || strcmp(string, "hi") == 0) {
638 element->mbe_type = MAC_BIBA_TYPE_HIGH;
639 element->mbe_grade = MAC_BIBA_TYPE_UNDEF;
640 } else if (strcmp(string, "low") == 0 || strcmp(string, "lo") == 0) {
641 element->mbe_type = MAC_BIBA_TYPE_LOW;
642 element->mbe_grade = MAC_BIBA_TYPE_UNDEF;
643 } else if (strcmp(string, "equal") == 0 ||
644 strcmp(string, "eq") == 0) {
645 element->mbe_type = MAC_BIBA_TYPE_EQUAL;
646 element->mbe_grade = MAC_BIBA_TYPE_UNDEF;
647 } else {
648 element->mbe_type = MAC_BIBA_TYPE_GRADE;
649
650 /*
651 * Numeric grade piece of the element.
652 */
653 grade = strsep(&string, ":");
654 value = strtol(grade, &end, 10);
655 if (end == grade || *end != '\0')
656 return (EINVAL);
657 if (value < 0 || value > 65535)
658 return (EINVAL);
659 element->mbe_grade = value;
660
661 /*
662 * Optional compartment piece of the element. If none are
663 * included, we assume that the label has no compartments.
664 */
665 if (string == NULL)
666 return (0);
667 if (*string == '\0')
668 return (0);
669
670 while ((compartment = strsep(&string, "+")) != NULL) {
671 value = strtol(compartment, &end, 10);
672 if (compartment == end || *end != '\0')
673 return (EINVAL);
674 if (value < 1 || value > MAC_BIBA_MAX_COMPARTMENTS)
675 return (EINVAL);
676 MAC_BIBA_BIT_SET(value, element->mbe_compartments);
677 }
678 }
679
680 return (0);
681 }
682
683 /*
684 * Note: destructively consumes the string, make a local copy before calling
685 * if that's a problem.
686 */
687 static int
688 biba_parse(struct mac_biba *mb, char *string)
689 {
690 char *rangehigh, *rangelow, *effective;
691 int error;
692
693 effective = strsep(&string, "(");
694 if (*effective == '\0')
695 effective = NULL;
696
697 if (string != NULL) {
698 rangelow = strsep(&string, "-");
699 if (string == NULL)
700 return (EINVAL);
701 rangehigh = strsep(&string, ")");
702 if (string == NULL)
703 return (EINVAL);
704 if (*string != '\0')
705 return (EINVAL);
706 } else {
707 rangelow = NULL;
708 rangehigh = NULL;
709 }
710
711 KASSERT((rangelow != NULL && rangehigh != NULL) ||
712 (rangelow == NULL && rangehigh == NULL),
713 ("biba_parse: range mismatch"));
714
715 bzero(mb, sizeof(*mb));
716 if (effective != NULL) {
717 error = biba_parse_element(&mb->mb_effective, effective);
718 if (error)
719 return (error);
720 mb->mb_flags |= MAC_BIBA_FLAG_EFFECTIVE;
721 }
722
723 if (rangelow != NULL) {
724 error = biba_parse_element(&mb->mb_rangelow, rangelow);
725 if (error)
726 return (error);
727 error = biba_parse_element(&mb->mb_rangehigh, rangehigh);
728 if (error)
729 return (error);
730 mb->mb_flags |= MAC_BIBA_FLAG_RANGE;
731 }
732
733 error = biba_valid(mb);
734 if (error)
735 return (error);
736
737 return (0);
738 }
739
740 static int
741 biba_internalize_label(struct label *label, char *element_name,
742 char *element_data, int *claimed)
743 {
744 struct mac_biba *mb, mb_temp;
745 int error;
746
747 if (strcmp(MAC_BIBA_LABEL_NAME, element_name) != 0)
748 return (0);
749
750 (*claimed)++;
751
752 error = biba_parse(&mb_temp, element_data);
753 if (error)
754 return (error);
755
756 mb = SLOT(label);
757 *mb = mb_temp;
758
759 return (0);
760 }
761
762 static void
763 biba_copy_label(struct label *src, struct label *dest)
764 {
765
766 *SLOT(dest) = *SLOT(src);
767 }
768
769 /*
770 * Object-specific entry point implementations are sorted alphabetically by
771 * object type name and then by operation.
772 */
773 static int
774 biba_bpfdesc_check_receive(struct bpf_d *d, struct label *dlabel,
775 struct ifnet *ifp, struct label *ifplabel)
776 {
777 struct mac_biba *a, *b;
778
779 if (!biba_enabled)
780 return (0);
781
782 a = SLOT(dlabel);
783 b = SLOT(ifplabel);
784
785 if (biba_equal_effective(a, b))
786 return (0);
787 return (EACCES);
788 }
789
790 static void
791 biba_bpfdesc_create(struct ucred *cred, struct bpf_d *d,
792 struct label *dlabel)
793 {
794 struct mac_biba *source, *dest;
795
796 source = SLOT(cred->cr_label);
797 dest = SLOT(dlabel);
798
799 biba_copy_effective(source, dest);
800 }
801
802 static void
803 biba_bpfdesc_create_mbuf(struct bpf_d *d, struct label *dlabel,
804 struct mbuf *m, struct label *mlabel)
805 {
806 struct mac_biba *source, *dest;
807
808 source = SLOT(dlabel);
809 dest = SLOT(mlabel);
810
811 biba_copy_effective(source, dest);
812 }
813
814 static void
815 biba_cred_associate_nfsd(struct ucred *cred)
816 {
817 struct mac_biba *label;
818
819 label = SLOT(cred->cr_label);
820 biba_set_effective(label, MAC_BIBA_TYPE_LOW, 0, NULL);
821 biba_set_range(label, MAC_BIBA_TYPE_LOW, 0, NULL, MAC_BIBA_TYPE_HIGH,
822 0, NULL);
823 }
824
825 static int
826 biba_cred_check_relabel(struct ucred *cred, struct label *newlabel)
827 {
828 struct mac_biba *subj, *new;
829 int error;
830
831 subj = SLOT(cred->cr_label);
832 new = SLOT(newlabel);
833
834 /*
835 * If there is a Biba label update for the credential, it may
836 * be an update of the effective, range, or both.
837 */
838 error = biba_atmostflags(new, MAC_BIBA_FLAGS_BOTH);
839 if (error)
840 return (error);
841
842 /*
843 * If the Biba label is to be changed, authorize as appropriate.
844 */
845 if (new->mb_flags & MAC_BIBA_FLAGS_BOTH) {
846 /*
847 * If the change request modifies both the Biba label
848 * effective and range, check that the new effective will be
849 * in the new range.
850 */
851 if ((new->mb_flags & MAC_BIBA_FLAGS_BOTH) ==
852 MAC_BIBA_FLAGS_BOTH &&
853 !biba_effective_in_range(new, new))
854 return (EINVAL);
855
856 /*
857 * To change the Biba effective label on a credential, the
858 * new effective label must be in the current range.
859 */
860 if (new->mb_flags & MAC_BIBA_FLAG_EFFECTIVE &&
861 !biba_effective_in_range(new, subj))
862 return (EPERM);
863
864 /*
865 * To change the Biba range on a credential, the new range
866 * label must be in the current range.
867 */
868 if (new->mb_flags & MAC_BIBA_FLAG_RANGE &&
869 !biba_range_in_range(new, subj))
870 return (EPERM);
871
872 /*
873 * To have EQUAL in any component of the new credential Biba
874 * label, the subject must already have EQUAL in their label.
875 */
876 if (biba_contains_equal(new)) {
877 error = biba_subject_privileged(subj);
878 if (error)
879 return (error);
880 }
881 }
882
883 return (0);
884 }
885
886 static int
887 biba_cred_check_visible(struct ucred *u1, struct ucred *u2)
888 {
889 struct mac_biba *subj, *obj;
890
891 if (!biba_enabled)
892 return (0);
893
894 subj = SLOT(u1->cr_label);
895 obj = SLOT(u2->cr_label);
896
897 /* XXX: range */
898 if (!biba_dominate_effective(obj, subj))
899 return (ESRCH);
900
901 return (0);
902 }
903
904 static void
905 biba_cred_create_init(struct ucred *cred)
906 {
907 struct mac_biba *dest;
908
909 dest = SLOT(cred->cr_label);
910
911 biba_set_effective(dest, MAC_BIBA_TYPE_HIGH, 0, NULL);
912 biba_set_range(dest, MAC_BIBA_TYPE_LOW, 0, NULL, MAC_BIBA_TYPE_HIGH,
913 0, NULL);
914 }
915
916 static void
917 biba_cred_create_swapper(struct ucred *cred)
918 {
919 struct mac_biba *dest;
920
921 dest = SLOT(cred->cr_label);
922
923 biba_set_effective(dest, MAC_BIBA_TYPE_EQUAL, 0, NULL);
924 biba_set_range(dest, MAC_BIBA_TYPE_LOW, 0, NULL, MAC_BIBA_TYPE_HIGH,
925 0, NULL);
926 }
927
928 static void
929 biba_cred_relabel(struct ucred *cred, struct label *newlabel)
930 {
931 struct mac_biba *source, *dest;
932
933 source = SLOT(newlabel);
934 dest = SLOT(cred->cr_label);
935
936 biba_copy(source, dest);
937 }
938
939 static void
940 biba_devfs_create_device(struct ucred *cred, struct mount *mp,
941 struct cdev *dev, struct devfs_dirent *de, struct label *delabel)
942 {
943 struct mac_biba *mb;
944 const char *dn;
945 int biba_type;
946
947 mb = SLOT(delabel);
948 dn = devtoname(dev);
949 if (strcmp(dn, "null") == 0 ||
950 strcmp(dn, "zero") == 0 ||
951 strcmp(dn, "random") == 0 ||
952 strncmp(dn, "fd/", strlen("fd/")) == 0)
953 biba_type = MAC_BIBA_TYPE_EQUAL;
954 else if (ptys_equal &&
955 (strncmp(dn, "ttyp", strlen("ttyp")) == 0 ||
956 strncmp(dn, "pts/", strlen("pts/")) == 0 ||
957 strncmp(dn, "ptyp", strlen("ptyp")) == 0))
958 biba_type = MAC_BIBA_TYPE_EQUAL;
959 else
960 biba_type = MAC_BIBA_TYPE_HIGH;
961 biba_set_effective(mb, biba_type, 0, NULL);
962 }
963
964 static void
965 biba_devfs_create_directory(struct mount *mp, char *dirname, int dirnamelen,
966 struct devfs_dirent *de, struct label *delabel)
967 {
968 struct mac_biba *mb;
969
970 mb = SLOT(delabel);
971
972 biba_set_effective(mb, MAC_BIBA_TYPE_HIGH, 0, NULL);
973 }
974
975 static void
976 biba_devfs_create_symlink(struct ucred *cred, struct mount *mp,
977 struct devfs_dirent *dd, struct label *ddlabel, struct devfs_dirent *de,
978 struct label *delabel)
979 {
980 struct mac_biba *source, *dest;
981
982 source = SLOT(cred->cr_label);
983 dest = SLOT(delabel);
984
985 biba_copy_effective(source, dest);
986 }
987
988 static void
989 biba_devfs_update(struct mount *mp, struct devfs_dirent *de,
990 struct label *delabel, struct vnode *vp, struct label *vplabel)
991 {
992 struct mac_biba *source, *dest;
993
994 source = SLOT(vplabel);
995 dest = SLOT(delabel);
996
997 biba_copy(source, dest);
998 }
999
1000 static void
1001 biba_devfs_vnode_associate(struct mount *mp, struct label *mntlabel,
1002 struct devfs_dirent *de, struct label *delabel, struct vnode *vp,
1003 struct label *vplabel)
1004 {
1005 struct mac_biba *source, *dest;
1006
1007 source = SLOT(delabel);
1008 dest = SLOT(vplabel);
1009
1010 biba_copy_effective(source, dest);
1011 }
1012
1013 static int
1014 biba_ifnet_check_relabel(struct ucred *cred, struct ifnet *ifp,
1015 struct label *ifplabel, struct label *newlabel)
1016 {
1017 struct mac_biba *subj, *new;
1018 int error;
1019
1020 subj = SLOT(cred->cr_label);
1021 new = SLOT(newlabel);
1022
1023 /*
1024 * If there is a Biba label update for the interface, it may be an
1025 * update of the effective, range, or both.
1026 */
1027 error = biba_atmostflags(new, MAC_BIBA_FLAGS_BOTH);
1028 if (error)
1029 return (error);
1030
1031 /*
1032 * Relabling network interfaces requires Biba privilege.
1033 */
1034 error = biba_subject_privileged(subj);
1035 if (error)
1036 return (error);
1037
1038 return (0);
1039 }
1040
1041 static int
1042 biba_ifnet_check_transmit(struct ifnet *ifp, struct label *ifplabel,
1043 struct mbuf *m, struct label *mlabel)
1044 {
1045 struct mac_biba *p, *i;
1046
1047 if (!biba_enabled)
1048 return (0);
1049
1050 p = SLOT(mlabel);
1051 i = SLOT(ifplabel);
1052
1053 return (biba_effective_in_range(p, i) ? 0 : EACCES);
1054 }
1055
1056 static void
1057 biba_ifnet_create(struct ifnet *ifp, struct label *ifplabel)
1058 {
1059 char tifname[IFNAMSIZ], *p, *q;
1060 char tiflist[sizeof(trusted_interfaces)];
1061 struct mac_biba *dest;
1062 int len, type;
1063
1064 dest = SLOT(ifplabel);
1065
1066 if (ifp->if_type == IFT_LOOP || interfaces_equal != 0) {
1067 type = MAC_BIBA_TYPE_EQUAL;
1068 goto set;
1069 }
1070
1071 if (trust_all_interfaces) {
1072 type = MAC_BIBA_TYPE_HIGH;
1073 goto set;
1074 }
1075
1076 type = MAC_BIBA_TYPE_LOW;
1077
1078 if (trusted_interfaces[0] == '\0' ||
1079 !strvalid(trusted_interfaces, sizeof(trusted_interfaces)))
1080 goto set;
1081
1082 bzero(tiflist, sizeof(tiflist));
1083 for (p = trusted_interfaces, q = tiflist; *p != '\0'; p++, q++)
1084 if(*p != ' ' && *p != '\t')
1085 *q = *p;
1086
1087 for (p = q = tiflist;; p++) {
1088 if (*p == ',' || *p == '\0') {
1089 len = p - q;
1090 if (len < IFNAMSIZ) {
1091 bzero(tifname, sizeof(tifname));
1092 bcopy(q, tifname, len);
1093 if (strcmp(tifname, ifp->if_xname) == 0) {
1094 type = MAC_BIBA_TYPE_HIGH;
1095 break;
1096 }
1097 } else {
1098 *p = '\0';
1099 printf("mac_biba warning: interface name "
1100 "\"%s\" is too long (must be < %d)\n",
1101 q, IFNAMSIZ);
1102 }
1103 if (*p == '\0')
1104 break;
1105 q = p + 1;
1106 }
1107 }
1108 set:
1109 biba_set_effective(dest, type, 0, NULL);
1110 biba_set_range(dest, type, 0, NULL, type, 0, NULL);
1111 }
1112
1113 static void
1114 biba_ifnet_create_mbuf(struct ifnet *ifp, struct label *ifplabel,
1115 struct mbuf *m, struct label *mlabel)
1116 {
1117 struct mac_biba *source, *dest;
1118
1119 source = SLOT(ifplabel);
1120 dest = SLOT(mlabel);
1121
1122 biba_copy_effective(source, dest);
1123 }
1124
1125 static void
1126 biba_ifnet_relabel(struct ucred *cred, struct ifnet *ifp,
1127 struct label *ifplabel, struct label *newlabel)
1128 {
1129 struct mac_biba *source, *dest;
1130
1131 source = SLOT(newlabel);
1132 dest = SLOT(ifplabel);
1133
1134 biba_copy(source, dest);
1135 }
1136
1137 static int
1138 biba_inpcb_check_deliver(struct inpcb *inp, struct label *inplabel,
1139 struct mbuf *m, struct label *mlabel)
1140 {
1141 struct mac_biba *p, *i;
1142
1143 if (!biba_enabled)
1144 return (0);
1145
1146 p = SLOT(mlabel);
1147 i = SLOT(inplabel);
1148
1149 return (biba_equal_effective(p, i) ? 0 : EACCES);
1150 }
1151
1152 static int
1153 biba_inpcb_check_visible(struct ucred *cred, struct inpcb *inp,
1154 struct label *inplabel)
1155 {
1156 struct mac_biba *subj, *obj;
1157
1158 if (!biba_enabled)
1159 return (0);
1160
1161 subj = SLOT(cred->cr_label);
1162 obj = SLOT(inplabel);
1163
1164 if (!biba_dominate_effective(obj, subj))
1165 return (ENOENT);
1166
1167 return (0);
1168 }
1169
1170 static void
1171 biba_inpcb_create(struct socket *so, struct label *solabel,
1172 struct inpcb *inp, struct label *inplabel)
1173 {
1174 struct mac_biba *source, *dest;
1175
1176 source = SLOT(solabel);
1177 dest = SLOT(inplabel);
1178
1179 SOCK_LOCK(so);
1180 biba_copy_effective(source, dest);
1181 SOCK_UNLOCK(so);
1182 }
1183
1184 static void
1185 biba_inpcb_create_mbuf(struct inpcb *inp, struct label *inplabel,
1186 struct mbuf *m, struct label *mlabel)
1187 {
1188 struct mac_biba *source, *dest;
1189
1190 source = SLOT(inplabel);
1191 dest = SLOT(mlabel);
1192
1193 biba_copy_effective(source, dest);
1194 }
1195
1196 static void
1197 biba_inpcb_sosetlabel(struct socket *so, struct label *solabel,
1198 struct inpcb *inp, struct label *inplabel)
1199 {
1200 struct mac_biba *source, *dest;
1201
1202 SOCK_LOCK_ASSERT(so);
1203
1204 source = SLOT(solabel);
1205 dest = SLOT(inplabel);
1206
1207 biba_copy(source, dest);
1208 }
1209
1210 static void
1211 biba_ip6q_create(struct mbuf *m, struct label *mlabel, struct ip6q *q6,
1212 struct label *q6label)
1213 {
1214 struct mac_biba *source, *dest;
1215
1216 source = SLOT(mlabel);
1217 dest = SLOT(q6label);
1218
1219 biba_copy_effective(source, dest);
1220 }
1221
1222 static int
1223 biba_ip6q_match(struct mbuf *m, struct label *mlabel, struct ip6q *q6,
1224 struct label *q6label)
1225 {
1226 struct mac_biba *a, *b;
1227
1228 a = SLOT(q6label);
1229 b = SLOT(mlabel);
1230
1231 return (biba_equal_effective(a, b));
1232 }
1233
1234 static void
1235 biba_ip6q_reassemble(struct ip6q *q6, struct label *q6label, struct mbuf *m,
1236 struct label *mlabel)
1237 {
1238 struct mac_biba *source, *dest;
1239
1240 source = SLOT(q6label);
1241 dest = SLOT(mlabel);
1242
1243 /* Just use the head, since we require them all to match. */
1244 biba_copy_effective(source, dest);
1245 }
1246
1247 static void
1248 biba_ip6q_update(struct mbuf *m, struct label *mlabel, struct ip6q *q6,
1249 struct label *q6label)
1250 {
1251
1252 /* NOOP: we only accept matching labels, so no need to update */
1253 }
1254
1255 static void
1256 biba_ipq_create(struct mbuf *m, struct label *mlabel, struct ipq *q,
1257 struct label *qlabel)
1258 {
1259 struct mac_biba *source, *dest;
1260
1261 source = SLOT(mlabel);
1262 dest = SLOT(qlabel);
1263
1264 biba_copy_effective(source, dest);
1265 }
1266
1267 static int
1268 biba_ipq_match(struct mbuf *m, struct label *mlabel, struct ipq *q,
1269 struct label *qlabel)
1270 {
1271 struct mac_biba *a, *b;
1272
1273 a = SLOT(qlabel);
1274 b = SLOT(mlabel);
1275
1276 return (biba_equal_effective(a, b));
1277 }
1278
1279 static void
1280 biba_ipq_reassemble(struct ipq *q, struct label *qlabel, struct mbuf *m,
1281 struct label *mlabel)
1282 {
1283 struct mac_biba *source, *dest;
1284
1285 source = SLOT(qlabel);
1286 dest = SLOT(mlabel);
1287
1288 /* Just use the head, since we require them all to match. */
1289 biba_copy_effective(source, dest);
1290 }
1291
1292 static void
1293 biba_ipq_update(struct mbuf *m, struct label *mlabel, struct ipq *q,
1294 struct label *qlabel)
1295 {
1296
1297 /* NOOP: we only accept matching labels, so no need to update */
1298 }
1299
1300 static int
1301 biba_kld_check_load(struct ucred *cred, struct vnode *vp,
1302 struct label *vplabel)
1303 {
1304 struct mac_biba *subj, *obj;
1305 int error;
1306
1307 if (!biba_enabled)
1308 return (0);
1309
1310 subj = SLOT(cred->cr_label);
1311
1312 error = biba_subject_privileged(subj);
1313 if (error)
1314 return (error);
1315
1316 obj = SLOT(vplabel);
1317 if (!biba_high_effective(obj))
1318 return (EACCES);
1319
1320 return (0);
1321 }
1322
1323 static int
1324 biba_mount_check_stat(struct ucred *cred, struct mount *mp,
1325 struct label *mplabel)
1326 {
1327 struct mac_biba *subj, *obj;
1328
1329 if (!biba_enabled)
1330 return (0);
1331
1332 subj = SLOT(cred->cr_label);
1333 obj = SLOT(mplabel);
1334
1335 if (!biba_dominate_effective(obj, subj))
1336 return (EACCES);
1337
1338 return (0);
1339 }
1340
1341 static void
1342 biba_mount_create(struct ucred *cred, struct mount *mp,
1343 struct label *mplabel)
1344 {
1345 struct mac_biba *source, *dest;
1346
1347 source = SLOT(cred->cr_label);
1348 dest = SLOT(mplabel);
1349
1350 biba_copy_effective(source, dest);
1351 }
1352
1353 static void
1354 biba_netinet_arp_send(struct ifnet *ifp, struct label *ifplabel,
1355 struct mbuf *m, struct label *mlabel)
1356 {
1357 struct mac_biba *dest;
1358
1359 dest = SLOT(mlabel);
1360
1361 biba_set_effective(dest, MAC_BIBA_TYPE_EQUAL, 0, NULL);
1362 }
1363
1364 static void
1365 biba_netinet_firewall_reply(struct mbuf *mrecv, struct label *mrecvlabel,
1366 struct mbuf *msend, struct label *msendlabel)
1367 {
1368 struct mac_biba *source, *dest;
1369
1370 source = SLOT(mrecvlabel);
1371 dest = SLOT(msendlabel);
1372
1373 biba_copy_effective(source, dest);
1374 }
1375
1376 static void
1377 biba_netinet_firewall_send(struct mbuf *m, struct label *mlabel)
1378 {
1379 struct mac_biba *dest;
1380
1381 dest = SLOT(mlabel);
1382
1383 /* XXX: where is the label for the firewall really coming from? */
1384 biba_set_effective(dest, MAC_BIBA_TYPE_EQUAL, 0, NULL);
1385 }
1386
1387 static void
1388 biba_netinet_fragment(struct mbuf *m, struct label *mlabel,
1389 struct mbuf *frag, struct label *fraglabel)
1390 {
1391 struct mac_biba *source, *dest;
1392
1393 source = SLOT(mlabel);
1394 dest = SLOT(fraglabel);
1395
1396 biba_copy_effective(source, dest);
1397 }
1398
1399 static void
1400 biba_netinet_icmp_reply(struct mbuf *mrecv, struct label *mrecvlabel,
1401 struct mbuf *msend, struct label *msendlabel)
1402 {
1403 struct mac_biba *source, *dest;
1404
1405 source = SLOT(mrecvlabel);
1406 dest = SLOT(msendlabel);
1407
1408 biba_copy_effective(source, dest);
1409 }
1410
1411 static void
1412 biba_netinet_igmp_send(struct ifnet *ifp, struct label *ifplabel,
1413 struct mbuf *m, struct label *mlabel)
1414 {
1415 struct mac_biba *dest;
1416
1417 dest = SLOT(mlabel);
1418
1419 biba_set_effective(dest, MAC_BIBA_TYPE_EQUAL, 0, NULL);
1420 }
1421
1422 static void
1423 biba_netinet6_nd6_send(struct ifnet *ifp, struct label *ifplabel,
1424 struct mbuf *m, struct label *mlabel)
1425 {
1426 struct mac_biba *dest;
1427
1428 dest = SLOT(mlabel);
1429
1430 biba_set_effective(dest, MAC_BIBA_TYPE_EQUAL, 0, NULL);
1431 }
1432
1433 static int
1434 biba_pipe_check_ioctl(struct ucred *cred, struct pipepair *pp,
1435 struct label *pplabel, unsigned long cmd, void /* caddr_t */ *data)
1436 {
1437
1438 if(!biba_enabled)
1439 return (0);
1440
1441 /* XXX: This will be implemented soon... */
1442
1443 return (0);
1444 }
1445
1446 static int
1447 biba_pipe_check_poll(struct ucred *cred, struct pipepair *pp,
1448 struct label *pplabel)
1449 {
1450 struct mac_biba *subj, *obj;
1451
1452 if (!biba_enabled)
1453 return (0);
1454
1455 subj = SLOT(cred->cr_label);
1456 obj = SLOT(pplabel);
1457
1458 if (!biba_dominate_effective(obj, subj))
1459 return (EACCES);
1460
1461 return (0);
1462 }
1463
1464 static int
1465 biba_pipe_check_read(struct ucred *cred, struct pipepair *pp,
1466 struct label *pplabel)
1467 {
1468 struct mac_biba *subj, *obj;
1469
1470 if (!biba_enabled)
1471 return (0);
1472
1473 subj = SLOT(cred->cr_label);
1474 obj = SLOT(pplabel);
1475
1476 if (!biba_dominate_effective(obj, subj))
1477 return (EACCES);
1478
1479 return (0);
1480 }
1481
1482 static int
1483 biba_pipe_check_relabel(struct ucred *cred, struct pipepair *pp,
1484 struct label *pplabel, struct label *newlabel)
1485 {
1486 struct mac_biba *subj, *obj, *new;
1487 int error;
1488
1489 new = SLOT(newlabel);
1490 subj = SLOT(cred->cr_label);
1491 obj = SLOT(pplabel);
1492
1493 /*
1494 * If there is a Biba label update for a pipe, it must be a effective
1495 * update.
1496 */
1497 error = biba_atmostflags(new, MAC_BIBA_FLAG_EFFECTIVE);
1498 if (error)
1499 return (error);
1500
1501 /*
1502 * To perform a relabel of a pipe (Biba label or not), Biba must
1503 * authorize the relabel.
1504 */
1505 if (!biba_effective_in_range(obj, subj))
1506 return (EPERM);
1507
1508 /*
1509 * If the Biba label is to be changed, authorize as appropriate.
1510 */
1511 if (new->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) {
1512 /*
1513 * To change the Biba label on a pipe, the new pipe label
1514 * must be in the subject range.
1515 */
1516 if (!biba_effective_in_range(new, subj))
1517 return (EPERM);
1518
1519 /*
1520 * To change the Biba label on a pipe to be EQUAL, the
1521 * subject must have appropriate privilege.
1522 */
1523 if (biba_contains_equal(new)) {
1524 error = biba_subject_privileged(subj);
1525 if (error)
1526 return (error);
1527 }
1528 }
1529
1530 return (0);
1531 }
1532
1533 static int
1534 biba_pipe_check_stat(struct ucred *cred, struct pipepair *pp,
1535 struct label *pplabel)
1536 {
1537 struct mac_biba *subj, *obj;
1538
1539 if (!biba_enabled)
1540 return (0);
1541
1542 subj = SLOT(cred->cr_label);
1543 obj = SLOT(pplabel);
1544
1545 if (!biba_dominate_effective(obj, subj))
1546 return (EACCES);
1547
1548 return (0);
1549 }
1550
1551 static int
1552 biba_pipe_check_write(struct ucred *cred, struct pipepair *pp,
1553 struct label *pplabel)
1554 {
1555 struct mac_biba *subj, *obj;
1556
1557 if (!biba_enabled)
1558 return (0);
1559
1560 subj = SLOT(cred->cr_label);
1561 obj = SLOT(pplabel);
1562
1563 if (!biba_dominate_effective(subj, obj))
1564 return (EACCES);
1565
1566 return (0);
1567 }
1568
1569 static void
1570 biba_pipe_create(struct ucred *cred, struct pipepair *pp,
1571 struct label *pplabel)
1572 {
1573 struct mac_biba *source, *dest;
1574
1575 source = SLOT(cred->cr_label);
1576 dest = SLOT(pplabel);
1577
1578 biba_copy_effective(source, dest);
1579 }
1580
1581 static void
1582 biba_pipe_relabel(struct ucred *cred, struct pipepair *pp,
1583 struct label *pplabel, struct label *newlabel)
1584 {
1585 struct mac_biba *source, *dest;
1586
1587 source = SLOT(newlabel);
1588 dest = SLOT(pplabel);
1589
1590 biba_copy(source, dest);
1591 }
1592
1593 static int
1594 biba_posixsem_check_openunlink(struct ucred *cred, struct ksem *ks,
1595 struct label *kslabel)
1596 {
1597 struct mac_biba *subj, *obj;
1598
1599 if (!biba_enabled)
1600 return (0);
1601
1602 subj = SLOT(cred->cr_label);
1603 obj = SLOT(kslabel);
1604
1605 if (!biba_dominate_effective(subj, obj))
1606 return (EACCES);
1607
1608 return (0);
1609 }
1610
1611 static int
1612 biba_posixsem_check_setmode(struct ucred *cred, struct ksem *ks,
1613 struct label *kslabel, mode_t mode)
1614 {
1615 struct mac_biba *subj, *obj;
1616
1617 if (!biba_enabled)
1618 return (0);
1619
1620 subj = SLOT(cred->cr_label);
1621 obj = SLOT(kslabel);
1622
1623 if (!biba_dominate_effective(subj, obj))
1624 return (EACCES);
1625
1626 return (0);
1627 }
1628
1629 static int
1630 biba_posixsem_check_setowner(struct ucred *cred, struct ksem *ks,
1631 struct label *kslabel, uid_t uid, gid_t gid)
1632 {
1633 struct mac_biba *subj, *obj;
1634
1635 if (!biba_enabled)
1636 return (0);
1637
1638 subj = SLOT(cred->cr_label);
1639 obj = SLOT(kslabel);
1640
1641 if (!biba_dominate_effective(subj, obj))
1642 return (EACCES);
1643
1644 return (0);
1645 }
1646
1647 static int
1648 biba_posixsem_check_write(struct ucred *active_cred, struct ucred *file_cred,
1649 struct ksem *ks, struct label *kslabel)
1650 {
1651 struct mac_biba *subj, *obj;
1652
1653 if (!biba_enabled)
1654 return (0);
1655
1656 subj = SLOT(active_cred->cr_label);
1657 obj = SLOT(kslabel);
1658
1659 if (!biba_dominate_effective(subj, obj))
1660 return (EACCES);
1661
1662 return (0);
1663 }
1664
1665 static int
1666 biba_posixsem_check_rdonly(struct ucred *active_cred, struct ucred *file_cred,
1667 struct ksem *ks, struct label *kslabel)
1668 {
1669 struct mac_biba *subj, *obj;
1670
1671 if (!biba_enabled)
1672 return (0);
1673
1674 subj = SLOT(active_cred->cr_label);
1675 obj = SLOT(kslabel);
1676
1677 if (!biba_dominate_effective(obj, subj))
1678 return (EACCES);
1679
1680 return (0);
1681 }
1682
1683 static void
1684 biba_posixsem_create(struct ucred *cred, struct ksem *ks,
1685 struct label *kslabel)
1686 {
1687 struct mac_biba *source, *dest;
1688
1689 source = SLOT(cred->cr_label);
1690 dest = SLOT(kslabel);
1691
1692 biba_copy_effective(source, dest);
1693 }
1694
1695 static int
1696 biba_posixshm_check_mmap(struct ucred *cred, struct shmfd *shmfd,
1697 struct label *shmlabel, int prot, int flags)
1698 {
1699 struct mac_biba *subj, *obj;
1700
1701 if (!biba_enabled || !revocation_enabled)
1702 return (0);
1703
1704 subj = SLOT(cred->cr_label);
1705 obj = SLOT(shmlabel);
1706
1707 if (prot & (VM_PROT_READ | VM_PROT_EXECUTE)) {
1708 if (!biba_dominate_effective(obj, subj))
1709 return (EACCES);
1710 }
1711 if (((prot & VM_PROT_WRITE) != 0) && ((flags & MAP_SHARED) != 0)) {
1712 if (!biba_dominate_effective(subj, obj))
1713 return (EACCES);
1714 }
1715
1716 return (0);
1717 }
1718
1719 static int
1720 biba_posixshm_check_open(struct ucred *cred, struct shmfd *shmfd,
1721 struct label *shmlabel, accmode_t accmode)
1722 {
1723 struct mac_biba *subj, *obj;
1724
1725 if (!biba_enabled)
1726 return (0);
1727
1728 subj = SLOT(cred->cr_label);
1729 obj = SLOT(shmlabel);
1730
1731 if (accmode & (VREAD | VEXEC | VSTAT_PERMS)) {
1732 if (!biba_dominate_effective(obj, subj))
1733 return (EACCES);
1734 }
1735 if (accmode & VMODIFY_PERMS) {
1736 if (!biba_dominate_effective(subj, obj))
1737 return (EACCES);
1738 }
1739
1740 return (0);
1741 }
1742
1743 static int
1744 biba_posixshm_check_read(struct ucred *active_cred, struct ucred *file_cred,
1745 struct shmfd *vp, struct label *shmlabel)
1746 {
1747 struct mac_biba *subj, *obj;
1748
1749 if (!biba_enabled || !revocation_enabled)
1750 return (0);
1751
1752 subj = SLOT(active_cred->cr_label);
1753 obj = SLOT(shmlabel);
1754
1755 if (!biba_dominate_effective(obj, subj))
1756 return (EACCES);
1757
1758 return (0);
1759 }
1760
1761 static int
1762 biba_posixshm_check_setmode(struct ucred *cred, struct shmfd *shmfd,
1763 struct label *shmlabel, mode_t mode)
1764 {
1765 struct mac_biba *subj, *obj;
1766
1767 if (!biba_enabled)
1768 return (0);
1769
1770 subj = SLOT(cred->cr_label);
1771 obj = SLOT(shmlabel);
1772
1773 if (!biba_dominate_effective(subj, obj))
1774 return (EACCES);
1775
1776 return (0);
1777 }
1778
1779 static int
1780 biba_posixshm_check_setowner(struct ucred *cred, struct shmfd *shmfd,
1781 struct label *shmlabel, uid_t uid, gid_t gid)
1782 {
1783 struct mac_biba *subj, *obj;
1784
1785 if (!biba_enabled)
1786 return (0);
1787
1788 subj = SLOT(cred->cr_label);
1789 obj = SLOT(shmlabel);
1790
1791 if (!biba_dominate_effective(subj, obj))
1792 return (EACCES);
1793
1794 return (0);
1795 }
1796
1797 static int
1798 biba_posixshm_check_stat(struct ucred *active_cred, struct ucred *file_cred,
1799 struct shmfd *shmfd, struct label *shmlabel)
1800 {
1801 struct mac_biba *subj, *obj;
1802
1803 if (!biba_enabled)
1804 return (0);
1805
1806 subj = SLOT(active_cred->cr_label);
1807 obj = SLOT(shmlabel);
1808
1809 if (!biba_dominate_effective(obj, subj))
1810 return (EACCES);
1811
1812 return (0);
1813 }
1814
1815 static int
1816 biba_posixshm_check_truncate(struct ucred *active_cred,
1817 struct ucred *file_cred, struct shmfd *shmfd, struct label *shmlabel)
1818 {
1819 struct mac_biba *subj, *obj;
1820
1821 if (!biba_enabled)
1822 return (0);
1823
1824 subj = SLOT(active_cred->cr_label);
1825 obj = SLOT(shmlabel);
1826
1827 if (!biba_dominate_effective(subj, obj))
1828 return (EACCES);
1829
1830 return (0);
1831 }
1832
1833 static int
1834 biba_posixshm_check_unlink(struct ucred *cred, struct shmfd *shmfd,
1835 struct label *shmlabel)
1836 {
1837 struct mac_biba *subj, *obj;
1838
1839 if (!biba_enabled)
1840 return (0);
1841
1842 subj = SLOT(cred->cr_label);
1843 obj = SLOT(shmlabel);
1844
1845 if (!biba_dominate_effective(subj, obj))
1846 return (EACCES);
1847
1848 return (0);
1849 }
1850
1851 static int
1852 biba_posixshm_check_write(struct ucred *active_cred, struct ucred *file_cred,
1853 struct shmfd *vp, struct label *shmlabel)
1854 {
1855 struct mac_biba *subj, *obj;
1856
1857 if (!biba_enabled || !revocation_enabled)
1858 return (0);
1859
1860 subj = SLOT(active_cred->cr_label);
1861 obj = SLOT(shmlabel);
1862
1863 if (!biba_dominate_effective(obj, subj))
1864 return (EACCES);
1865
1866 return (0);
1867 }
1868
1869 static void
1870 biba_posixshm_create(struct ucred *cred, struct shmfd *shmfd,
1871 struct label *shmlabel)
1872 {
1873 struct mac_biba *source, *dest;
1874
1875 source = SLOT(cred->cr_label);
1876 dest = SLOT(shmlabel);
1877
1878 biba_copy_effective(source, dest);
1879 }
1880
1881 /*
1882 * Some system privileges are allowed regardless of integrity grade; others
1883 * are allowed only when running with privilege with respect to the Biba
1884 * policy as they might otherwise allow bypassing of the integrity policy.
1885 */
1886 static int
1887 biba_priv_check(struct ucred *cred, int priv)
1888 {
1889 struct mac_biba *subj;
1890 int error;
1891
1892 if (!biba_enabled)
1893 return (0);
1894
1895 /*
1896 * Exempt only specific privileges from the Biba integrity policy.
1897 */
1898 switch (priv) {
1899 case PRIV_KTRACE:
1900 case PRIV_MSGBUF:
1901
1902 /*
1903 * Allow processes to manipulate basic process audit properties, and
1904 * to submit audit records.
1905 */
1906 case PRIV_AUDIT_GETAUDIT:
1907 case PRIV_AUDIT_SETAUDIT:
1908 case PRIV_AUDIT_SUBMIT:
1909
1910 /*
1911 * Allow processes to manipulate their regular UNIX credentials.
1912 */
1913 case PRIV_CRED_SETUID:
1914 case PRIV_CRED_SETEUID:
1915 case PRIV_CRED_SETGID:
1916 case PRIV_CRED_SETEGID:
1917 case PRIV_CRED_SETGROUPS:
1918 case PRIV_CRED_SETREUID:
1919 case PRIV_CRED_SETREGID:
1920 case PRIV_CRED_SETRESUID:
1921 case PRIV_CRED_SETRESGID:
1922
1923 /*
1924 * Allow processes to perform system monitoring.
1925 */
1926 case PRIV_SEEOTHERGIDS:
1927 case PRIV_SEEOTHERUIDS:
1928 break;
1929
1930 /*
1931 * Allow access to general process debugging facilities. We
1932 * separately control debugging based on MAC label.
1933 */
1934 case PRIV_DEBUG_DIFFCRED:
1935 case PRIV_DEBUG_SUGID:
1936 case PRIV_DEBUG_UNPRIV:
1937
1938 /*
1939 * Allow manipulating jails.
1940 */
1941 case PRIV_JAIL_ATTACH:
1942
1943 /*
1944 * Allow privilege with respect to the Partition policy, but not the
1945 * Privs policy.
1946 */
1947 case PRIV_MAC_PARTITION:
1948
1949 /*
1950 * Allow privilege with respect to process resource limits and login
1951 * context.
1952 */
1953 case PRIV_PROC_LIMIT:
1954 case PRIV_PROC_SETLOGIN:
1955 case PRIV_PROC_SETRLIMIT:
1956
1957 /*
1958 * Allow System V and POSIX IPC privileges.
1959 */
1960 case PRIV_IPC_READ:
1961 case PRIV_IPC_WRITE:
1962 case PRIV_IPC_ADMIN:
1963 case PRIV_IPC_MSGSIZE:
1964 case PRIV_MQ_ADMIN:
1965
1966 /*
1967 * Allow certain scheduler manipulations -- possibly this should be
1968 * controlled by more fine-grained policy, as potentially low
1969 * integrity processes can deny CPU to higher integrity ones.
1970 */
1971 case PRIV_SCHED_DIFFCRED:
1972 case PRIV_SCHED_SETPRIORITY:
1973 case PRIV_SCHED_RTPRIO:
1974 case PRIV_SCHED_SETPOLICY:
1975 case PRIV_SCHED_SET:
1976 case PRIV_SCHED_SETPARAM:
1977
1978 /*
1979 * More IPC privileges.
1980 */
1981 case PRIV_SEM_WRITE:
1982
1983 /*
1984 * Allow signaling privileges subject to integrity policy.
1985 */
1986 case PRIV_SIGNAL_DIFFCRED:
1987 case PRIV_SIGNAL_SUGID:
1988
1989 /*
1990 * Allow access to only limited sysctls from lower integrity levels;
1991 * piggy-back on the Jail definition.
1992 */
1993 case PRIV_SYSCTL_WRITEJAIL:
1994
1995 /*
1996 * Allow TTY-based privileges, subject to general device access using
1997 * labels on TTY device nodes, but not console privilege.
1998 */
1999 case PRIV_TTY_DRAINWAIT:
2000 case PRIV_TTY_DTRWAIT:
2001 case PRIV_TTY_EXCLUSIVE:
2002 case PRIV_TTY_STI:
2003 case PRIV_TTY_SETA:
2004
2005 /*
2006 * Grant most VFS privileges, as almost all are in practice bounded
2007 * by more specific checks using labels.
2008 */
2009 case PRIV_VFS_READ:
2010 case PRIV_VFS_WRITE:
2011 case PRIV_VFS_ADMIN:
2012 case PRIV_VFS_EXEC:
2013 case PRIV_VFS_LOOKUP:
2014 case PRIV_VFS_CHFLAGS_DEV:
2015 case PRIV_VFS_CHOWN:
2016 case PRIV_VFS_CHROOT:
2017 case PRIV_VFS_RETAINSUGID:
2018 case PRIV_VFS_EXCEEDQUOTA:
2019 case PRIV_VFS_FCHROOT:
2020 case PRIV_VFS_FHOPEN:
2021 case PRIV_VFS_FHSTATFS:
2022 case PRIV_VFS_GENERATION:
2023 case PRIV_VFS_GETFH:
2024 case PRIV_VFS_GETQUOTA:
2025 case PRIV_VFS_LINK:
2026 case PRIV_VFS_MOUNT:
2027 case PRIV_VFS_MOUNT_OWNER:
2028 case PRIV_VFS_MOUNT_PERM:
2029 case PRIV_VFS_MOUNT_SUIDDIR:
2030 case PRIV_VFS_MOUNT_NONUSER:
2031 case PRIV_VFS_SETGID:
2032 case PRIV_VFS_STICKYFILE:
2033 case PRIV_VFS_SYSFLAGS:
2034 case PRIV_VFS_UNMOUNT:
2035
2036 /*
2037 * Allow VM privileges; it would be nice if these were subject to
2038 * resource limits.
2039 */
2040 case PRIV_VM_MADV_PROTECT:
2041 case PRIV_VM_MLOCK:
2042 case PRIV_VM_MUNLOCK:
2043 case PRIV_VM_SWAP_NOQUOTA:
2044 case PRIV_VM_SWAP_NORLIMIT:
2045
2046 /*
2047 * Allow some but not all network privileges. In general, dont allow
2048 * reconfiguring the network stack, just normal use.
2049 */
2050 case PRIV_NETINET_RESERVEDPORT:
2051 case PRIV_NETINET_RAW:
2052 case PRIV_NETINET_REUSEPORT:
2053 break;
2054
2055 /*
2056 * All remaining system privileges are allow only if the process
2057 * holds privilege with respect to the Biba policy.
2058 */
2059 default:
2060 subj = SLOT(cred->cr_label);
2061 error = biba_subject_privileged(subj);
2062 if (error)
2063 return (error);
2064 }
2065 return (0);
2066 }
2067
2068 static int
2069 biba_proc_check_debug(struct ucred *cred, struct proc *p)
2070 {
2071 struct mac_biba *subj, *obj;
2072
2073 if (!biba_enabled)
2074 return (0);
2075
2076 subj = SLOT(cred->cr_label);
2077 obj = SLOT(p->p_ucred->cr_label);
2078
2079 /* XXX: range checks */
2080 if (!biba_dominate_effective(obj, subj))
2081 return (ESRCH);
2082 if (!biba_dominate_effective(subj, obj))
2083 return (EACCES);
2084
2085 return (0);
2086 }
2087
2088 static int
2089 biba_proc_check_sched(struct ucred *cred, struct proc *p)
2090 {
2091 struct mac_biba *subj, *obj;
2092
2093 if (!biba_enabled)
2094 return (0);
2095
2096 subj = SLOT(cred->cr_label);
2097 obj = SLOT(p->p_ucred->cr_label);
2098
2099 /* XXX: range checks */
2100 if (!biba_dominate_effective(obj, subj))
2101 return (ESRCH);
2102 if (!biba_dominate_effective(subj, obj))
2103 return (EACCES);
2104
2105 return (0);
2106 }
2107
2108 static int
2109 biba_proc_check_signal(struct ucred *cred, struct proc *p, int signum)
2110 {
2111 struct mac_biba *subj, *obj;
2112
2113 if (!biba_enabled)
2114 return (0);
2115
2116 subj = SLOT(cred->cr_label);
2117 obj = SLOT(p->p_ucred->cr_label);
2118
2119 /* XXX: range checks */
2120 if (!biba_dominate_effective(obj, subj))
2121 return (ESRCH);
2122 if (!biba_dominate_effective(subj, obj))
2123 return (EACCES);
2124
2125 return (0);
2126 }
2127
2128 static int
2129 biba_socket_check_deliver(struct socket *so, struct label *solabel,
2130 struct mbuf *m, struct label *mlabel)
2131 {
2132 struct mac_biba *p, *s;
2133 int error;
2134
2135 if (!biba_enabled)
2136 return (0);
2137
2138 p = SLOT(mlabel);
2139 s = SLOT(solabel);
2140
2141 SOCK_LOCK(so);
2142 error = biba_equal_effective(p, s) ? 0 : EACCES;
2143 SOCK_UNLOCK(so);
2144 return (error);
2145 }
2146
2147 static int
2148 biba_socket_check_relabel(struct ucred *cred, struct socket *so,
2149 struct label *solabel, struct label *newlabel)
2150 {
2151 struct mac_biba *subj, *obj, *new;
2152 int error;
2153
2154 SOCK_LOCK_ASSERT(so);
2155
2156 new = SLOT(newlabel);
2157 subj = SLOT(cred->cr_label);
2158 obj = SLOT(solabel);
2159
2160 /*
2161 * If there is a Biba label update for the socket, it may be an
2162 * update of effective.
2163 */
2164 error = biba_atmostflags(new, MAC_BIBA_FLAG_EFFECTIVE);
2165 if (error)
2166 return (error);
2167
2168 /*
2169 * To relabel a socket, the old socket effective must be in the
2170 * subject range.
2171 */
2172 if (!biba_effective_in_range(obj, subj))
2173 return (EPERM);
2174
2175 /*
2176 * If the Biba label is to be changed, authorize as appropriate.
2177 */
2178 if (new->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) {
2179 /*
2180 * To relabel a socket, the new socket effective must be in
2181 * the subject range.
2182 */
2183 if (!biba_effective_in_range(new, subj))
2184 return (EPERM);
2185
2186 /*
2187 * To change the Biba label on the socket to contain EQUAL,
2188 * the subject must have appropriate privilege.
2189 */
2190 if (biba_contains_equal(new)) {
2191 error = biba_subject_privileged(subj);
2192 if (error)
2193 return (error);
2194 }
2195 }
2196
2197 return (0);
2198 }
2199
2200 static int
2201 biba_socket_check_visible(struct ucred *cred, struct socket *so,
2202 struct label *solabel)
2203 {
2204 struct mac_biba *subj, *obj;
2205
2206 if (!biba_enabled)
2207 return (0);
2208
2209 subj = SLOT(cred->cr_label);
2210 obj = SLOT(solabel);
2211
2212 SOCK_LOCK(so);
2213 if (!biba_dominate_effective(obj, subj)) {
2214 SOCK_UNLOCK(so);
2215 return (ENOENT);
2216 }
2217 SOCK_UNLOCK(so);
2218
2219 return (0);
2220 }
2221
2222 static void
2223 biba_socket_create(struct ucred *cred, struct socket *so,
2224 struct label *solabel)
2225 {
2226 struct mac_biba *source, *dest;
2227
2228 source = SLOT(cred->cr_label);
2229 dest = SLOT(solabel);
2230
2231 biba_copy_effective(source, dest);
2232 }
2233
2234 static void
2235 biba_socket_create_mbuf(struct socket *so, struct label *solabel,
2236 struct mbuf *m, struct label *mlabel)
2237 {
2238 struct mac_biba *source, *dest;
2239
2240 source = SLOT(solabel);
2241 dest = SLOT(mlabel);
2242
2243 SOCK_LOCK(so);
2244 biba_copy_effective(source, dest);
2245 SOCK_UNLOCK(so);
2246 }
2247
2248 static void
2249 biba_socket_newconn(struct socket *oldso, struct label *oldsolabel,
2250 struct socket *newso, struct label *newsolabel)
2251 {
2252 struct mac_biba source, *dest;
2253
2254 SOCK_LOCK(oldso);
2255 source = *SLOT(oldsolabel);
2256 SOCK_UNLOCK(oldso);
2257
2258 dest = SLOT(newsolabel);
2259
2260 SOCK_LOCK(newso);
2261 biba_copy_effective(&source, dest);
2262 SOCK_UNLOCK(newso);
2263 }
2264
2265 static void
2266 biba_socket_relabel(struct ucred *cred, struct socket *so,
2267 struct label *solabel, struct label *newlabel)
2268 {
2269 struct mac_biba *source, *dest;
2270
2271 SOCK_LOCK_ASSERT(so);
2272
2273 source = SLOT(newlabel);
2274 dest = SLOT(solabel);
2275
2276 biba_copy(source, dest);
2277 }
2278
2279 static void
2280 biba_socketpeer_set_from_mbuf(struct mbuf *m, struct label *mlabel,
2281 struct socket *so, struct label *sopeerlabel)
2282 {
2283 struct mac_biba *source, *dest;
2284
2285 source = SLOT(mlabel);
2286 dest = SLOT(sopeerlabel);
2287
2288 SOCK_LOCK(so);
2289 biba_copy_effective(source, dest);
2290 SOCK_UNLOCK(so);
2291 }
2292
2293 static void
2294 biba_socketpeer_set_from_socket(struct socket *oldso,
2295 struct label *oldsolabel, struct socket *newso,
2296 struct label *newsopeerlabel)
2297 {
2298 struct mac_biba source, *dest;
2299
2300 SOCK_LOCK(oldso);
2301 source = *SLOT(oldsolabel);
2302 SOCK_UNLOCK(oldso);
2303 dest = SLOT(newsopeerlabel);
2304
2305 SOCK_LOCK(newso);
2306 biba_copy_effective(&source, dest);
2307 SOCK_UNLOCK(newso);
2308 }
2309
2310 static void
2311 biba_syncache_create(struct label *label, struct inpcb *inp)
2312 {
2313 struct mac_biba *source, *dest;
2314
2315 source = SLOT(inp->inp_label);
2316 dest = SLOT(label);
2317 biba_copy_effective(source, dest);
2318 }
2319
2320 static void
2321 biba_syncache_create_mbuf(struct label *sc_label, struct mbuf *m,
2322 struct label *mlabel)
2323 {
2324 struct mac_biba *source, *dest;
2325
2326 source = SLOT(sc_label);
2327 dest = SLOT(mlabel);
2328 biba_copy_effective(source, dest);
2329 }
2330
2331 static int
2332 biba_system_check_acct(struct ucred *cred, struct vnode *vp,
2333 struct label *vplabel)
2334 {
2335 struct mac_biba *subj, *obj;
2336 int error;
2337
2338 if (!biba_enabled)
2339 return (0);
2340
2341 subj = SLOT(cred->cr_label);
2342
2343 error = biba_subject_privileged(subj);
2344 if (error)
2345 return (error);
2346
2347 if (vplabel == NULL)
2348 return (0);
2349
2350 obj = SLOT(vplabel);
2351 if (!biba_high_effective(obj))
2352 return (EACCES);
2353
2354 return (0);
2355 }
2356
2357 static int
2358 biba_system_check_auditctl(struct ucred *cred, struct vnode *vp,
2359 struct label *vplabel)
2360 {
2361 struct mac_biba *subj, *obj;
2362 int error;
2363
2364 if (!biba_enabled)
2365 return (0);
2366
2367 subj = SLOT(cred->cr_label);
2368
2369 error = biba_subject_privileged(subj);
2370 if (error)
2371 return (error);
2372
2373 if (vplabel == NULL)
2374 return (0);
2375
2376 obj = SLOT(vplabel);
2377 if (!biba_high_effective(obj))
2378 return (EACCES);
2379
2380 return (0);
2381 }
2382
2383 static int
2384 biba_system_check_auditon(struct ucred *cred, int cmd)
2385 {
2386 struct mac_biba *subj;
2387 int error;
2388
2389 if (!biba_enabled)
2390 return (0);
2391
2392 subj = SLOT(cred->cr_label);
2393
2394 error = biba_subject_privileged(subj);
2395 if (error)
2396 return (error);
2397
2398 return (0);
2399 }
2400
2401 static int
2402 biba_system_check_swapoff(struct ucred *cred, struct vnode *vp,
2403 struct label *label)
2404 {
2405 struct mac_biba *subj;
2406 int error;
2407
2408 if (!biba_enabled)
2409 return (0);
2410
2411 subj = SLOT(cred->cr_label);
2412
2413 error = biba_subject_privileged(subj);
2414 if (error)
2415 return (error);
2416
2417 return (0);
2418 }
2419
2420 static int
2421 biba_system_check_swapon(struct ucred *cred, struct vnode *vp,
2422 struct label *vplabel)
2423 {
2424 struct mac_biba *subj, *obj;
2425 int error;
2426
2427 if (!biba_enabled)
2428 return (0);
2429
2430 subj = SLOT(cred->cr_label);
2431 obj = SLOT(vplabel);
2432
2433 error = biba_subject_privileged(subj);
2434 if (error)
2435 return (error);
2436
2437 if (!biba_high_effective(obj))
2438 return (EACCES);
2439
2440 return (0);
2441 }
2442
2443 static int
2444 biba_system_check_sysctl(struct ucred *cred, struct sysctl_oid *oidp,
2445 void *arg1, int arg2, struct sysctl_req *req)
2446 {
2447 struct mac_biba *subj;
2448 int error;
2449
2450 if (!biba_enabled)
2451 return (0);
2452
2453 subj = SLOT(cred->cr_label);
2454
2455 /*
2456 * Treat sysctl variables without CTLFLAG_ANYBODY flag as biba/high,
2457 * but also require privilege to change them.
2458 */
2459 if (req->newptr != NULL && (oidp->oid_kind & CTLFLAG_ANYBODY) == 0) {
2460 if (!biba_subject_dominate_high(subj))
2461 return (EACCES);
2462
2463 error = biba_subject_privileged(subj);
2464 if (error)
2465 return (error);
2466 }
2467
2468 return (0);
2469 }
2470
2471 static void
2472 biba_sysvmsg_cleanup(struct label *msglabel)
2473 {
2474
2475 bzero(SLOT(msglabel), sizeof(struct mac_biba));
2476 }
2477
2478 static void
2479 biba_sysvmsg_create(struct ucred *cred, struct msqid_kernel *msqkptr,
2480 struct label *msqlabel, struct msg *msgptr, struct label *msglabel)
2481 {
2482 struct mac_biba *source, *dest;
2483
2484 /* Ignore the msgq label */
2485 source = SLOT(cred->cr_label);
2486 dest = SLOT(msglabel);
2487
2488 biba_copy_effective(source, dest);
2489 }
2490
2491 static int
2492 biba_sysvmsq_check_msgrcv(struct ucred *cred, struct msg *msgptr,
2493 struct label *msglabel)
2494 {
2495 struct mac_biba *subj, *obj;
2496
2497 if (!biba_enabled)
2498 return (0);
2499
2500 subj = SLOT(cred->cr_label);
2501 obj = SLOT(msglabel);
2502
2503 if (!biba_dominate_effective(obj, subj))
2504 return (EACCES);
2505
2506 return (0);
2507 }
2508
2509 static int
2510 biba_sysvmsq_check_msgrmid(struct ucred *cred, struct msg *msgptr,
2511 struct label *msglabel)
2512 {
2513 struct mac_biba *subj, *obj;
2514
2515 if (!biba_enabled)
2516 return (0);
2517
2518 subj = SLOT(cred->cr_label);
2519 obj = SLOT(msglabel);
2520
2521 if (!biba_dominate_effective(subj, obj))
2522 return (EACCES);
2523
2524 return (0);
2525 }
2526
2527 static int
2528 biba_sysvmsq_check_msqget(struct ucred *cred, struct msqid_kernel *msqkptr,
2529 struct label *msqklabel)
2530 {
2531 struct mac_biba *subj, *obj;
2532
2533 if (!biba_enabled)
2534 return (0);
2535
2536 subj = SLOT(cred->cr_label);
2537 obj = SLOT(msqklabel);
2538
2539 if (!biba_dominate_effective(obj, subj))
2540 return (EACCES);
2541
2542 return (0);
2543 }
2544
2545 static int
2546 biba_sysvmsq_check_msqsnd(struct ucred *cred, struct msqid_kernel *msqkptr,
2547 struct label *msqklabel)
2548 {
2549 struct mac_biba *subj, *obj;
2550
2551 if (!biba_enabled)
2552 return (0);
2553
2554 subj = SLOT(cred->cr_label);
2555 obj = SLOT(msqklabel);
2556
2557 if (!biba_dominate_effective(subj, obj))
2558 return (EACCES);
2559
2560 return (0);
2561 }
2562
2563 static int
2564 biba_sysvmsq_check_msqrcv(struct ucred *cred, struct msqid_kernel *msqkptr,
2565 struct label *msqklabel)
2566 {
2567 struct mac_biba *subj, *obj;
2568
2569 if (!biba_enabled)
2570 return (0);
2571
2572 subj = SLOT(cred->cr_label);
2573 obj = SLOT(msqklabel);
2574
2575 if (!biba_dominate_effective(obj, subj))
2576 return (EACCES);
2577
2578 return (0);
2579 }
2580
2581 static int
2582 biba_sysvmsq_check_msqctl(struct ucred *cred, struct msqid_kernel *msqkptr,
2583 struct label *msqklabel, int cmd)
2584 {
2585 struct mac_biba *subj, *obj;
2586
2587 if (!biba_enabled)
2588 return (0);
2589
2590 subj = SLOT(cred->cr_label);
2591 obj = SLOT(msqklabel);
2592
2593 switch(cmd) {
2594 case IPC_RMID:
2595 case IPC_SET:
2596 if (!biba_dominate_effective(subj, obj))
2597 return (EACCES);
2598 break;
2599
2600 case IPC_STAT:
2601 if (!biba_dominate_effective(obj, subj))
2602 return (EACCES);
2603 break;
2604
2605 default:
2606 return (EACCES);
2607 }
2608
2609 return (0);
2610 }
2611
2612 static void
2613 biba_sysvmsq_cleanup(struct label *msqlabel)
2614 {
2615
2616 bzero(SLOT(msqlabel), sizeof(struct mac_biba));
2617 }
2618
2619 static void
2620 biba_sysvmsq_create(struct ucred *cred, struct msqid_kernel *msqkptr,
2621 struct label *msqlabel)
2622 {
2623 struct mac_biba *source, *dest;
2624
2625 source = SLOT(cred->cr_label);
2626 dest = SLOT(msqlabel);
2627
2628 biba_copy_effective(source, dest);
2629 }
2630
2631 static int
2632 biba_sysvsem_check_semctl(struct ucred *cred, struct semid_kernel *semakptr,
2633 struct label *semaklabel, int cmd)
2634 {
2635 struct mac_biba *subj, *obj;
2636
2637 if (!biba_enabled)
2638 return (0);
2639
2640 subj = SLOT(cred->cr_label);
2641 obj = SLOT(semaklabel);
2642
2643 switch(cmd) {
2644 case IPC_RMID:
2645 case IPC_SET:
2646 case SETVAL:
2647 case SETALL:
2648 if (!biba_dominate_effective(subj, obj))
2649 return (EACCES);
2650 break;
2651
2652 case IPC_STAT:
2653 case GETVAL:
2654 case GETPID:
2655 case GETNCNT:
2656 case GETZCNT:
2657 case GETALL:
2658 if (!biba_dominate_effective(obj, subj))
2659 return (EACCES);
2660 break;
2661
2662 default:
2663 return (EACCES);
2664 }
2665
2666 return (0);
2667 }
2668
2669 static int
2670 biba_sysvsem_check_semget(struct ucred *cred, struct semid_kernel *semakptr,
2671 struct label *semaklabel)
2672 {
2673 struct mac_biba *subj, *obj;
2674
2675 if (!biba_enabled)
2676 return (0);
2677
2678 subj = SLOT(cred->cr_label);
2679 obj = SLOT(semaklabel);
2680
2681 if (!biba_dominate_effective(obj, subj))
2682 return (EACCES);
2683
2684 return (0);
2685 }
2686
2687 static int
2688 biba_sysvsem_check_semop(struct ucred *cred, struct semid_kernel *semakptr,
2689 struct label *semaklabel, size_t accesstype)
2690 {
2691 struct mac_biba *subj, *obj;
2692
2693 if (!biba_enabled)
2694 return (0);
2695
2696 subj = SLOT(cred->cr_label);
2697 obj = SLOT(semaklabel);
2698
2699 if (accesstype & SEM_R)
2700 if (!biba_dominate_effective(obj, subj))
2701 return (EACCES);
2702
2703 if (accesstype & SEM_A)
2704 if (!biba_dominate_effective(subj, obj))
2705 return (EACCES);
2706
2707 return (0);
2708 }
2709
2710 static void
2711 biba_sysvsem_cleanup(struct label *semalabel)
2712 {
2713
2714 bzero(SLOT(semalabel), sizeof(struct mac_biba));
2715 }
2716
2717 static void
2718 biba_sysvsem_create(struct ucred *cred, struct semid_kernel *semakptr,
2719 struct label *semalabel)
2720 {
2721 struct mac_biba *source, *dest;
2722
2723 source = SLOT(cred->cr_label);
2724 dest = SLOT(semalabel);
2725
2726 biba_copy_effective(source, dest);
2727 }
2728
2729 static int
2730 biba_sysvshm_check_shmat(struct ucred *cred, struct shmid_kernel *shmsegptr,
2731 struct label *shmseglabel, int shmflg)
2732 {
2733 struct mac_biba *subj, *obj;
2734
2735 if (!biba_enabled)
2736 return (0);
2737
2738 subj = SLOT(cred->cr_label);
2739 obj = SLOT(shmseglabel);
2740
2741 if (!biba_dominate_effective(obj, subj))
2742 return (EACCES);
2743 if ((shmflg & SHM_RDONLY) == 0) {
2744 if (!biba_dominate_effective(subj, obj))
2745 return (EACCES);
2746 }
2747
2748 return (0);
2749 }
2750
2751 static int
2752 biba_sysvshm_check_shmctl(struct ucred *cred, struct shmid_kernel *shmsegptr,
2753 struct label *shmseglabel, int cmd)
2754 {
2755 struct mac_biba *subj, *obj;
2756
2757 if (!biba_enabled)
2758 return (0);
2759
2760 subj = SLOT(cred->cr_label);
2761 obj = SLOT(shmseglabel);
2762
2763 switch(cmd) {
2764 case IPC_RMID:
2765 case IPC_SET:
2766 if (!biba_dominate_effective(subj, obj))
2767 return (EACCES);
2768 break;
2769
2770 case IPC_STAT:
2771 case SHM_STAT:
2772 if (!biba_dominate_effective(obj, subj))
2773 return (EACCES);
2774 break;
2775
2776 default:
2777 return (EACCES);
2778 }
2779
2780 return (0);
2781 }
2782
2783 static int
2784 biba_sysvshm_check_shmget(struct ucred *cred, struct shmid_kernel *shmsegptr,
2785 struct label *shmseglabel, int shmflg)
2786 {
2787 struct mac_biba *subj, *obj;
2788
2789 if (!biba_enabled)
2790 return (0);
2791
2792 subj = SLOT(cred->cr_label);
2793 obj = SLOT(shmseglabel);
2794
2795 if (!biba_dominate_effective(obj, subj))
2796 return (EACCES);
2797
2798 return (0);
2799 }
2800
2801 static void
2802 biba_sysvshm_cleanup(struct label *shmlabel)
2803 {
2804
2805 bzero(SLOT(shmlabel), sizeof(struct mac_biba));
2806 }
2807
2808 static void
2809 biba_sysvshm_create(struct ucred *cred, struct shmid_kernel *shmsegptr,
2810 struct label *shmlabel)
2811 {
2812 struct mac_biba *source, *dest;
2813
2814 source = SLOT(cred->cr_label);
2815 dest = SLOT(shmlabel);
2816
2817 biba_copy_effective(source, dest);
2818 }
2819
2820 static int
2821 biba_vnode_associate_extattr(struct mount *mp, struct label *mplabel,
2822 struct vnode *vp, struct label *vplabel)
2823 {
2824 struct mac_biba mb_temp, *source, *dest;
2825 int buflen, error;
2826
2827 source = SLOT(mplabel);
2828 dest = SLOT(vplabel);
2829
2830 buflen = sizeof(mb_temp);
2831 bzero(&mb_temp, buflen);
2832
2833 error = vn_extattr_get(vp, IO_NODELOCKED, MAC_BIBA_EXTATTR_NAMESPACE,
2834 MAC_BIBA_EXTATTR_NAME, &buflen, (char *) &mb_temp, curthread);
2835 if (error == ENOATTR || error == EOPNOTSUPP) {
2836 /* Fall back to the mntlabel. */
2837 biba_copy_effective(source, dest);
2838 return (0);
2839 } else if (error)
2840 return (error);
2841
2842 if (buflen != sizeof(mb_temp)) {
2843 printf("biba_vnode_associate_extattr: bad size %d\n",
2844 buflen);
2845 return (EPERM);
2846 }
2847 if (biba_valid(&mb_temp) != 0) {
2848 printf("biba_vnode_associate_extattr: invalid\n");
2849 return (EPERM);
2850 }
2851 if ((mb_temp.mb_flags & MAC_BIBA_FLAGS_BOTH) !=
2852 MAC_BIBA_FLAG_EFFECTIVE) {
2853 printf("biba_vnode_associate_extattr: not effective\n");
2854 return (EPERM);
2855 }
2856
2857 biba_copy_effective(&mb_temp, dest);
2858 return (0);
2859 }
2860
2861 static void
2862 biba_vnode_associate_singlelabel(struct mount *mp, struct label *mplabel,
2863 struct vnode *vp, struct label *vplabel)
2864 {
2865 struct mac_biba *source, *dest;
2866
2867 source = SLOT(mplabel);
2868 dest = SLOT(vplabel);
2869
2870 biba_copy_effective(source, dest);
2871 }
2872
2873 static int
2874 biba_vnode_check_chdir(struct ucred *cred, struct vnode *dvp,
2875 struct label *dvplabel)
2876 {
2877 struct mac_biba *subj, *obj;
2878
2879 if (!biba_enabled)
2880 return (0);
2881
2882 subj = SLOT(cred->cr_label);
2883 obj = SLOT(dvplabel);
2884
2885 if (!biba_dominate_effective(obj, subj))
2886 return (EACCES);
2887
2888 return (0);
2889 }
2890
2891 static int
2892 biba_vnode_check_chroot(struct ucred *cred, struct vnode *dvp,
2893 struct label *dvplabel)
2894 {
2895 struct mac_biba *subj, *obj;
2896
2897 if (!biba_enabled)
2898 return (0);
2899
2900 subj = SLOT(cred->cr_label);
2901 obj = SLOT(dvplabel);
2902
2903 if (!biba_dominate_effective(obj, subj))
2904 return (EACCES);
2905
2906 return (0);
2907 }
2908
2909 static int
2910 biba_vnode_check_create(struct ucred *cred, struct vnode *dvp,
2911 struct label *dvplabel, struct componentname *cnp, struct vattr *vap)
2912 {
2913 struct mac_biba *subj, *obj;
2914
2915 if (!biba_enabled)
2916 return (0);
2917
2918 subj = SLOT(cred->cr_label);
2919 obj = SLOT(dvplabel);
2920
2921 if (!biba_dominate_effective(subj, obj))
2922 return (EACCES);
2923
2924 return (0);
2925 }
2926
2927 static int
2928 biba_vnode_check_deleteacl(struct ucred *cred, struct vnode *vp,
2929 struct label *vplabel, acl_type_t type)
2930 {
2931 struct mac_biba *subj, *obj;
2932
2933 if (!biba_enabled)
2934 return (0);
2935
2936 subj = SLOT(cred->cr_label);
2937 obj = SLOT(vplabel);
2938
2939 if (!biba_dominate_effective(subj, obj))
2940 return (EACCES);
2941
2942 return (0);
2943 }
2944
2945 static int
2946 biba_vnode_check_deleteextattr(struct ucred *cred, struct vnode *vp,
2947 struct label *vplabel, int attrnamespace, const char *name)
2948 {
2949 struct mac_biba *subj, *obj;
2950
2951 if (!biba_enabled)
2952 return (0);
2953
2954 subj = SLOT(cred->cr_label);
2955 obj = SLOT(vplabel);
2956
2957 if (!biba_dominate_effective(subj, obj))
2958 return (EACCES);
2959
2960 return (0);
2961 }
2962
2963 static int
2964 biba_vnode_check_exec(struct ucred *cred, struct vnode *vp,
2965 struct label *vplabel, struct image_params *imgp,
2966 struct label *execlabel)
2967 {
2968 struct mac_biba *subj, *obj, *exec;
2969 int error;
2970
2971 if (execlabel != NULL) {
2972 /*
2973 * We currently don't permit labels to be changed at
2974 * exec-time as part of Biba, so disallow non-NULL Biba label
2975 * elements in the execlabel.
2976 */
2977 exec = SLOT(execlabel);
2978 error = biba_atmostflags(exec, 0);
2979 if (error)
2980 return (error);
2981 }
2982
2983 if (!biba_enabled)
2984 return (0);
2985
2986 subj = SLOT(cred->cr_label);
2987 obj = SLOT(vplabel);
2988
2989 if (!biba_dominate_effective(obj, subj))
2990 return (EACCES);
2991
2992 return (0);
2993 }
2994
2995 static int
2996 biba_vnode_check_getacl(struct ucred *cred, struct vnode *vp,
2997 struct label *vplabel, acl_type_t type)
2998 {
2999 struct mac_biba *subj, *obj;
3000
3001 if (!biba_enabled)
3002 return (0);
3003
3004 subj = SLOT(cred->cr_label);
3005 obj = SLOT(vplabel);
3006
3007 if (!biba_dominate_effective(obj, subj))
3008 return (EACCES);
3009
3010 return (0);
3011 }
3012
3013 static int
3014 biba_vnode_check_getextattr(struct ucred *cred, struct vnode *vp,
3015 struct label *vplabel, int attrnamespace, const char *name)
3016 {
3017 struct mac_biba *subj, *obj;
3018
3019 if (!biba_enabled)
3020 return (0);
3021
3022 subj = SLOT(cred->cr_label);
3023 obj = SLOT(vplabel);
3024
3025 if (!biba_dominate_effective(obj, subj))
3026 return (EACCES);
3027
3028 return (0);
3029 }
3030
3031 static int
3032 biba_vnode_check_link(struct ucred *cred, struct vnode *dvp,
3033 struct label *dvplabel, struct vnode *vp, struct label *vplabel,
3034 struct componentname *cnp)
3035 {
3036 struct mac_biba *subj, *obj;
3037
3038 if (!biba_enabled)
3039 return (0);
3040
3041 subj = SLOT(cred->cr_label);
3042 obj = SLOT(dvplabel);
3043
3044 if (!biba_dominate_effective(subj, obj))
3045 return (EACCES);
3046
3047 obj = SLOT(vplabel);
3048
3049 if (!biba_dominate_effective(subj, obj))
3050 return (EACCES);
3051
3052 return (0);
3053 }
3054
3055 static int
3056 biba_vnode_check_listextattr(struct ucred *cred, struct vnode *vp,
3057 struct label *vplabel, int attrnamespace)
3058 {
3059 struct mac_biba *subj, *obj;
3060
3061 if (!biba_enabled)
3062 return (0);
3063
3064 subj = SLOT(cred->cr_label);
3065 obj = SLOT(vplabel);
3066
3067 if (!biba_dominate_effective(obj, subj))
3068 return (EACCES);
3069
3070 return (0);
3071 }
3072
3073 static int
3074 biba_vnode_check_lookup(struct ucred *cred, struct vnode *dvp,
3075 struct label *dvplabel, struct componentname *cnp)
3076 {
3077 struct mac_biba *subj, *obj;
3078
3079 if (!biba_enabled)
3080 return (0);
3081
3082 subj = SLOT(cred->cr_label);
3083 obj = SLOT(dvplabel);
3084
3085 if (!biba_dominate_effective(obj, subj))
3086 return (EACCES);
3087
3088 return (0);
3089 }
3090
3091 static int
3092 biba_vnode_check_mmap(struct ucred *cred, struct vnode *vp,
3093 struct label *vplabel, int prot, int flags)
3094 {
3095 struct mac_biba *subj, *obj;
3096
3097 /*
3098 * Rely on the use of open()-time protections to handle
3099 * non-revocation cases.
3100 */
3101 if (!biba_enabled || !revocation_enabled)
3102 return (0);
3103
3104 subj = SLOT(cred->cr_label);
3105 obj = SLOT(vplabel);
3106
3107 if (prot & (VM_PROT_READ | VM_PROT_EXECUTE)) {
3108 if (!biba_dominate_effective(obj, subj))
3109 return (EACCES);
3110 }
3111 if (((prot & VM_PROT_WRITE) != 0) && ((flags & MAP_SHARED) != 0)) {
3112 if (!biba_dominate_effective(subj, obj))
3113 return (EACCES);
3114 }
3115
3116 return (0);
3117 }
3118
3119 static int
3120 biba_vnode_check_open(struct ucred *cred, struct vnode *vp,
3121 struct label *vplabel, accmode_t accmode)
3122 {
3123 struct mac_biba *subj, *obj;
3124
3125 if (!biba_enabled)
3126 return (0);
3127
3128 subj = SLOT(cred->cr_label);
3129 obj = SLOT(vplabel);
3130
3131 /* XXX privilege override for admin? */
3132 if (accmode & (VREAD | VEXEC | VSTAT_PERMS)) {
3133 if (!biba_dominate_effective(obj, subj))
3134 return (EACCES);
3135 }
3136 if (accmode & VMODIFY_PERMS) {
3137 if (!biba_dominate_effective(subj, obj))
3138 return (EACCES);
3139 }
3140
3141 return (0);
3142 }
3143
3144 static int
3145 biba_vnode_check_poll(struct ucred *active_cred, struct ucred *file_cred,
3146 struct vnode *vp, struct label *vplabel)
3147 {
3148 struct mac_biba *subj, *obj;
3149
3150 if (!biba_enabled || !revocation_enabled)
3151 return (0);
3152
3153 subj = SLOT(active_cred->cr_label);
3154 obj = SLOT(vplabel);
3155
3156 if (!biba_dominate_effective(obj, subj))
3157 return (EACCES);
3158
3159 return (0);
3160 }
3161
3162 static int
3163 biba_vnode_check_read(struct ucred *active_cred, struct ucred *file_cred,
3164 struct vnode *vp, struct label *vplabel)
3165 {
3166 struct mac_biba *subj, *obj;
3167
3168 if (!biba_enabled || !revocation_enabled)
3169 return (0);
3170
3171 subj = SLOT(active_cred->cr_label);
3172 obj = SLOT(vplabel);
3173
3174 if (!biba_dominate_effective(obj, subj))
3175 return (EACCES);
3176
3177 return (0);
3178 }
3179
3180 static int
3181 biba_vnode_check_readdir(struct ucred *cred, struct vnode *dvp,
3182 struct label *dvplabel)
3183 {
3184 struct mac_biba *subj, *obj;
3185
3186 if (!biba_enabled)
3187 return (0);
3188
3189 subj = SLOT(cred->cr_label);
3190 obj = SLOT(dvplabel);
3191
3192 if (!biba_dominate_effective(obj, subj))
3193 return (EACCES);
3194
3195 return (0);
3196 }
3197
3198 static int
3199 biba_vnode_check_readlink(struct ucred *cred, struct vnode *vp,
3200 struct label *vplabel)
3201 {
3202 struct mac_biba *subj, *obj;
3203
3204 if (!biba_enabled)
3205 return (0);
3206
3207 subj = SLOT(cred->cr_label);
3208 obj = SLOT(vplabel);
3209
3210 if (!biba_dominate_effective(obj, subj))
3211 return (EACCES);
3212
3213 return (0);
3214 }
3215
3216 static int
3217 biba_vnode_check_relabel(struct ucred *cred, struct vnode *vp,
3218 struct label *vplabel, struct label *newlabel)
3219 {
3220 struct mac_biba *old, *new, *subj;
3221 int error;
3222
3223 old = SLOT(vplabel);
3224 new = SLOT(newlabel);
3225 subj = SLOT(cred->cr_label);
3226
3227 /*
3228 * If there is a Biba label update for the vnode, it must be a
3229 * effective label.
3230 */
3231 error = biba_atmostflags(new, MAC_BIBA_FLAG_EFFECTIVE);
3232 if (error)
3233 return (error);
3234
3235 /*
3236 * To perform a relabel of the vnode (Biba label or not), Biba must
3237 * authorize the relabel.
3238 */
3239 if (!biba_effective_in_range(old, subj))
3240 return (EPERM);
3241
3242 /*
3243 * If the Biba label is to be changed, authorize as appropriate.
3244 */
3245 if (new->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) {
3246 /*
3247 * To change the Biba label on a vnode, the new vnode label
3248 * must be in the subject range.
3249 */
3250 if (!biba_effective_in_range(new, subj))
3251 return (EPERM);
3252
3253 /*
3254 * To change the Biba label on the vnode to be EQUAL, the
3255 * subject must have appropriate privilege.
3256 */
3257 if (biba_contains_equal(new)) {
3258 error = biba_subject_privileged(subj);
3259 if (error)
3260 return (error);
3261 }
3262 }
3263
3264 return (0);
3265 }
3266
3267 static int
3268 biba_vnode_check_rename_from(struct ucred *cred, struct vnode *dvp,
3269 struct label *dvplabel, struct vnode *vp, struct label *vplabel,
3270 struct componentname *cnp)
3271 {
3272 struct mac_biba *subj, *obj;
3273
3274 if (!biba_enabled)
3275 return (0);
3276
3277 subj = SLOT(cred->cr_label);
3278 obj = SLOT(dvplabel);
3279
3280 if (!biba_dominate_effective(subj, obj))
3281 return (EACCES);
3282
3283 obj = SLOT(vplabel);
3284
3285 if (!biba_dominate_effective(subj, obj))
3286 return (EACCES);
3287
3288 return (0);
3289 }
3290
3291 static int
3292 biba_vnode_check_rename_to(struct ucred *cred, struct vnode *dvp,
3293 struct label *dvplabel, struct vnode *vp, struct label *vplabel,
3294 int samedir, struct componentname *cnp)
3295 {
3296 struct mac_biba *subj, *obj;
3297
3298 if (!biba_enabled)
3299 return (0);
3300
3301 subj = SLOT(cred->cr_label);
3302 obj = SLOT(dvplabel);
3303
3304 if (!biba_dominate_effective(subj, obj))
3305 return (EACCES);
3306
3307 if (vp != NULL) {
3308 obj = SLOT(vplabel);
3309
3310 if (!biba_dominate_effective(subj, obj))
3311 return (EACCES);
3312 }
3313
3314 return (0);
3315 }
3316
3317 static int
3318 biba_vnode_check_revoke(struct ucred *cred, struct vnode *vp,
3319 struct label *vplabel)
3320 {
3321 struct mac_biba *subj, *obj;
3322
3323 if (!biba_enabled)
3324 return (0);
3325
3326 subj = SLOT(cred->cr_label);
3327 obj = SLOT(vplabel);
3328
3329 if (!biba_dominate_effective(subj, obj))
3330 return (EACCES);
3331
3332 return (0);
3333 }
3334
3335 static int
3336 biba_vnode_check_setacl(struct ucred *cred, struct vnode *vp,
3337 struct label *vplabel, acl_type_t type, struct acl *acl)
3338 {
3339 struct mac_biba *subj, *obj;
3340
3341 if (!biba_enabled)
3342 return (0);
3343
3344 subj = SLOT(cred->cr_label);
3345 obj = SLOT(vplabel);
3346
3347 if (!biba_dominate_effective(subj, obj))
3348 return (EACCES);
3349
3350 return (0);
3351 }
3352
3353 static int
3354 biba_vnode_check_setextattr(struct ucred *cred, struct vnode *vp,
3355 struct label *vplabel, int attrnamespace, const char *name)
3356 {
3357 struct mac_biba *subj, *obj;
3358
3359 if (!biba_enabled)
3360 return (0);
3361
3362 subj = SLOT(cred->cr_label);
3363 obj = SLOT(vplabel);
3364
3365 if (!biba_dominate_effective(subj, obj))
3366 return (EACCES);
3367
3368 /* XXX: protect the MAC EA in a special way? */
3369
3370 return (0);
3371 }
3372
3373 static int
3374 biba_vnode_check_setflags(struct ucred *cred, struct vnode *vp,
3375 struct label *vplabel, u_long flags)
3376 {
3377 struct mac_biba *subj, *obj;
3378
3379 if (!biba_enabled)
3380 return (0);
3381
3382 subj = SLOT(cred->cr_label);
3383 obj = SLOT(vplabel);
3384
3385 if (!biba_dominate_effective(subj, obj))
3386 return (EACCES);
3387
3388 return (0);
3389 }
3390
3391 static int
3392 biba_vnode_check_setmode(struct ucred *cred, struct vnode *vp,
3393 struct label *vplabel, mode_t mode)
3394 {
3395 struct mac_biba *subj, *obj;
3396
3397 if (!biba_enabled)
3398 return (0);
3399
3400 subj = SLOT(cred->cr_label);
3401 obj = SLOT(vplabel);
3402
3403 if (!biba_dominate_effective(subj, obj))
3404 return (EACCES);
3405
3406 return (0);
3407 }
3408
3409 static int
3410 biba_vnode_check_setowner(struct ucred *cred, struct vnode *vp,
3411 struct label *vplabel, uid_t uid, gid_t gid)
3412 {
3413 struct mac_biba *subj, *obj;
3414
3415 if (!biba_enabled)
3416 return (0);
3417
3418 subj = SLOT(cred->cr_label);
3419 obj = SLOT(vplabel);
3420
3421 if (!biba_dominate_effective(subj, obj))
3422 return (EACCES);
3423
3424 return (0);
3425 }
3426
3427 static int
3428 biba_vnode_check_setutimes(struct ucred *cred, struct vnode *vp,
3429 struct label *vplabel, struct timespec atime, struct timespec mtime)
3430 {
3431 struct mac_biba *subj, *obj;
3432
3433 if (!biba_enabled)
3434 return (0);
3435
3436 subj = SLOT(cred->cr_label);
3437 obj = SLOT(vplabel);
3438
3439 if (!biba_dominate_effective(subj, obj))
3440 return (EACCES);
3441
3442 return (0);
3443 }
3444
3445 static int
3446 biba_vnode_check_stat(struct ucred *active_cred, struct ucred *file_cred,
3447 struct vnode *vp, struct label *vplabel)
3448 {
3449 struct mac_biba *subj, *obj;
3450
3451 if (!biba_enabled)
3452 return (0);
3453
3454 subj = SLOT(active_cred->cr_label);
3455 obj = SLOT(vplabel);
3456
3457 if (!biba_dominate_effective(obj, subj))
3458 return (EACCES);
3459
3460 return (0);
3461 }
3462
3463 static int
3464 biba_vnode_check_unlink(struct ucred *cred, struct vnode *dvp,
3465 struct label *dvplabel, struct vnode *vp, struct label *vplabel,
3466 struct componentname *cnp)
3467 {
3468 struct mac_biba *subj, *obj;
3469
3470 if (!biba_enabled)
3471 return (0);
3472
3473 subj = SLOT(cred->cr_label);
3474 obj = SLOT(dvplabel);
3475
3476 if (!biba_dominate_effective(subj, obj))
3477 return (EACCES);
3478
3479 obj = SLOT(vplabel);
3480
3481 if (!biba_dominate_effective(subj, obj))
3482 return (EACCES);
3483
3484 return (0);
3485 }
3486
3487 static int
3488 biba_vnode_check_write(struct ucred *active_cred,
3489 struct ucred *file_cred, struct vnode *vp, struct label *vplabel)
3490 {
3491 struct mac_biba *subj, *obj;
3492
3493 if (!biba_enabled || !revocation_enabled)
3494 return (0);
3495
3496 subj = SLOT(active_cred->cr_label);
3497 obj = SLOT(vplabel);
3498
3499 if (!biba_dominate_effective(subj, obj))
3500 return (EACCES);
3501
3502 return (0);
3503 }
3504
3505 static int
3506 biba_vnode_create_extattr(struct ucred *cred, struct mount *mp,
3507 struct label *mplabel, struct vnode *dvp, struct label *dvplabel,
3508 struct vnode *vp, struct label *vplabel, struct componentname *cnp)
3509 {
3510 struct mac_biba *source, *dest, mb_temp;
3511 size_t buflen;
3512 int error;
3513
3514 buflen = sizeof(mb_temp);
3515 bzero(&mb_temp, buflen);
3516
3517 source = SLOT(cred->cr_label);
3518 dest = SLOT(vplabel);
3519 biba_copy_effective(source, &mb_temp);
3520
3521 error = vn_extattr_set(vp, IO_NODELOCKED, MAC_BIBA_EXTATTR_NAMESPACE,
3522 MAC_BIBA_EXTATTR_NAME, buflen, (char *) &mb_temp, curthread);
3523 if (error == 0)
3524 biba_copy_effective(source, dest);
3525 return (error);
3526 }
3527
3528 static void
3529 biba_vnode_relabel(struct ucred *cred, struct vnode *vp,
3530 struct label *vplabel, struct label *newlabel)
3531 {
3532 struct mac_biba *source, *dest;
3533
3534 source = SLOT(newlabel);
3535 dest = SLOT(vplabel);
3536
3537 biba_copy(source, dest);
3538 }
3539
3540 static int
3541 biba_vnode_setlabel_extattr(struct ucred *cred, struct vnode *vp,
3542 struct label *vplabel, struct label *intlabel)
3543 {
3544 struct mac_biba *source, mb_temp;
3545 size_t buflen;
3546 int error;
3547
3548 buflen = sizeof(mb_temp);
3549 bzero(&mb_temp, buflen);
3550
3551 source = SLOT(intlabel);
3552 if ((source->mb_flags & MAC_BIBA_FLAG_EFFECTIVE) == 0)
3553 return (0);
3554
3555 biba_copy_effective(source, &mb_temp);
3556
3557 error = vn_extattr_set(vp, IO_NODELOCKED, MAC_BIBA_EXTATTR_NAMESPACE,
3558 MAC_BIBA_EXTATTR_NAME, buflen, (char *) &mb_temp, curthread);
3559 return (error);
3560 }
3561
3562 static struct mac_policy_ops mac_biba_ops =
3563 {
3564 .mpo_init = biba_init,
3565
3566 .mpo_bpfdesc_check_receive = biba_bpfdesc_check_receive,
3567 .mpo_bpfdesc_create = biba_bpfdesc_create,
3568 .mpo_bpfdesc_create_mbuf = biba_bpfdesc_create_mbuf,
3569 .mpo_bpfdesc_destroy_label = biba_destroy_label,
3570 .mpo_bpfdesc_init_label = biba_init_label,
3571
3572 .mpo_cred_associate_nfsd = biba_cred_associate_nfsd,
3573 .mpo_cred_check_relabel = biba_cred_check_relabel,
3574 .mpo_cred_check_visible = biba_cred_check_visible,
3575 .mpo_cred_copy_label = biba_copy_label,
3576 .mpo_cred_create_init = biba_cred_create_init,
3577 .mpo_cred_create_swapper = biba_cred_create_swapper,
3578 .mpo_cred_destroy_label = biba_destroy_label,
3579 .mpo_cred_externalize_label = biba_externalize_label,
3580 .mpo_cred_init_label = biba_init_label,
3581 .mpo_cred_internalize_label = biba_internalize_label,
3582 .mpo_cred_relabel = biba_cred_relabel,
3583
3584 .mpo_devfs_create_device = biba_devfs_create_device,
3585 .mpo_devfs_create_directory = biba_devfs_create_directory,
3586 .mpo_devfs_create_symlink = biba_devfs_create_symlink,
3587 .mpo_devfs_destroy_label = biba_destroy_label,
3588 .mpo_devfs_init_label = biba_init_label,
3589 .mpo_devfs_update = biba_devfs_update,
3590 .mpo_devfs_vnode_associate = biba_devfs_vnode_associate,
3591
3592 .mpo_ifnet_check_relabel = biba_ifnet_check_relabel,
3593 .mpo_ifnet_check_transmit = biba_ifnet_check_transmit,
3594 .mpo_ifnet_copy_label = biba_copy_label,
3595 .mpo_ifnet_create = biba_ifnet_create,
3596 .mpo_ifnet_create_mbuf = biba_ifnet_create_mbuf,
3597 .mpo_ifnet_destroy_label = biba_destroy_label,
3598 .mpo_ifnet_externalize_label = biba_externalize_label,
3599 .mpo_ifnet_init_label = biba_init_label,
3600 .mpo_ifnet_internalize_label = biba_internalize_label,
3601 .mpo_ifnet_relabel = biba_ifnet_relabel,
3602
3603 .mpo_inpcb_check_deliver = biba_inpcb_check_deliver,
3604 .mpo_inpcb_check_visible = biba_inpcb_check_visible,
3605 .mpo_inpcb_create = biba_inpcb_create,
3606 .mpo_inpcb_create_mbuf = biba_inpcb_create_mbuf,
3607 .mpo_inpcb_destroy_label = biba_destroy_label,
3608 .mpo_inpcb_init_label = biba_init_label_waitcheck,
3609 .mpo_inpcb_sosetlabel = biba_inpcb_sosetlabel,
3610
3611 .mpo_ip6q_create = biba_ip6q_create,
3612 .mpo_ip6q_destroy_label = biba_destroy_label,
3613 .mpo_ip6q_init_label = biba_init_label_waitcheck,
3614 .mpo_ip6q_match = biba_ip6q_match,
3615 .mpo_ip6q_reassemble = biba_ip6q_reassemble,
3616 .mpo_ip6q_update = biba_ip6q_update,
3617
3618 .mpo_ipq_create = biba_ipq_create,
3619 .mpo_ipq_destroy_label = biba_destroy_label,
3620 .mpo_ipq_init_label = biba_init_label_waitcheck,
3621 .mpo_ipq_match = biba_ipq_match,
3622 .mpo_ipq_reassemble = biba_ipq_reassemble,
3623 .mpo_ipq_update = biba_ipq_update,
3624
3625 .mpo_kld_check_load = biba_kld_check_load,
3626
3627 .mpo_mbuf_copy_label = biba_copy_label,
3628 .mpo_mbuf_destroy_label = biba_destroy_label,
3629 .mpo_mbuf_init_label = biba_init_label_waitcheck,
3630
3631 .mpo_mount_check_stat = biba_mount_check_stat,
3632 .mpo_mount_create = biba_mount_create,
3633 .mpo_mount_destroy_label = biba_destroy_label,
3634 .mpo_mount_init_label = biba_init_label,
3635
3636 .mpo_netinet_arp_send = biba_netinet_arp_send,
3637 .mpo_netinet_firewall_reply = biba_netinet_firewall_reply,
3638 .mpo_netinet_firewall_send = biba_netinet_firewall_send,
3639 .mpo_netinet_fragment = biba_netinet_fragment,
3640 .mpo_netinet_icmp_reply = biba_netinet_icmp_reply,
3641 .mpo_netinet_igmp_send = biba_netinet_igmp_send,
3642
3643 .mpo_netinet6_nd6_send = biba_netinet6_nd6_send,
3644
3645 .mpo_pipe_check_ioctl = biba_pipe_check_ioctl,
3646 .mpo_pipe_check_poll = biba_pipe_check_poll,
3647 .mpo_pipe_check_read = biba_pipe_check_read,
3648 .mpo_pipe_check_relabel = biba_pipe_check_relabel,
3649 .mpo_pipe_check_stat = biba_pipe_check_stat,
3650 .mpo_pipe_check_write = biba_pipe_check_write,
3651 .mpo_pipe_copy_label = biba_copy_label,
3652 .mpo_pipe_create = biba_pipe_create,
3653 .mpo_pipe_destroy_label = biba_destroy_label,
3654 .mpo_pipe_externalize_label = biba_externalize_label,
3655 .mpo_pipe_init_label = biba_init_label,
3656 .mpo_pipe_internalize_label = biba_internalize_label,
3657 .mpo_pipe_relabel = biba_pipe_relabel,
3658
3659 .mpo_posixsem_check_getvalue = biba_posixsem_check_rdonly,
3660 .mpo_posixsem_check_open = biba_posixsem_check_openunlink,
3661 .mpo_posixsem_check_post = biba_posixsem_check_write,
3662 .mpo_posixsem_check_setmode = biba_posixsem_check_setmode,
3663 .mpo_posixsem_check_setowner = biba_posixsem_check_setowner,
3664 .mpo_posixsem_check_stat = biba_posixsem_check_rdonly,
3665 .mpo_posixsem_check_unlink = biba_posixsem_check_openunlink,
3666 .mpo_posixsem_check_wait = biba_posixsem_check_write,
3667 .mpo_posixsem_create = biba_posixsem_create,
3668 .mpo_posixsem_destroy_label = biba_destroy_label,
3669 .mpo_posixsem_init_label = biba_init_label,
3670
3671 .mpo_posixshm_check_mmap = biba_posixshm_check_mmap,
3672 .mpo_posixshm_check_open = biba_posixshm_check_open,
3673 .mpo_posixshm_check_read = biba_posixshm_check_read,
3674 .mpo_posixshm_check_setmode = biba_posixshm_check_setmode,
3675 .mpo_posixshm_check_setowner = biba_posixshm_check_setowner,
3676 .mpo_posixshm_check_stat = biba_posixshm_check_stat,
3677 .mpo_posixshm_check_truncate = biba_posixshm_check_truncate,
3678 .mpo_posixshm_check_unlink = biba_posixshm_check_unlink,
3679 .mpo_posixshm_check_write = biba_posixshm_check_write,
3680 .mpo_posixshm_create = biba_posixshm_create,
3681 .mpo_posixshm_destroy_label = biba_destroy_label,
3682 .mpo_posixshm_init_label = biba_init_label,
3683
3684 .mpo_priv_check = biba_priv_check,
3685
3686 .mpo_proc_check_debug = biba_proc_check_debug,
3687 .mpo_proc_check_sched = biba_proc_check_sched,
3688 .mpo_proc_check_signal = biba_proc_check_signal,
3689
3690 .mpo_socket_check_deliver = biba_socket_check_deliver,
3691 .mpo_socket_check_relabel = biba_socket_check_relabel,
3692 .mpo_socket_check_visible = biba_socket_check_visible,
3693 .mpo_socket_copy_label = biba_copy_label,
3694 .mpo_socket_create = biba_socket_create,
3695 .mpo_socket_create_mbuf = biba_socket_create_mbuf,
3696 .mpo_socket_destroy_label = biba_destroy_label,
3697 .mpo_socket_externalize_label = biba_externalize_label,
3698 .mpo_socket_init_label = biba_init_label_waitcheck,
3699 .mpo_socket_internalize_label = biba_internalize_label,
3700 .mpo_socket_newconn = biba_socket_newconn,
3701 .mpo_socket_relabel = biba_socket_relabel,
3702
3703 .mpo_socketpeer_destroy_label = biba_destroy_label,
3704 .mpo_socketpeer_externalize_label = biba_externalize_label,
3705 .mpo_socketpeer_init_label = biba_init_label_waitcheck,
3706 .mpo_socketpeer_set_from_mbuf = biba_socketpeer_set_from_mbuf,
3707 .mpo_socketpeer_set_from_socket = biba_socketpeer_set_from_socket,
3708
3709 .mpo_syncache_create = biba_syncache_create,
3710 .mpo_syncache_create_mbuf = biba_syncache_create_mbuf,
3711 .mpo_syncache_destroy_label = biba_destroy_label,
3712 .mpo_syncache_init_label = biba_init_label_waitcheck,
3713
3714 .mpo_system_check_acct = biba_system_check_acct,
3715 .mpo_system_check_auditctl = biba_system_check_auditctl,
3716 .mpo_system_check_auditon = biba_system_check_auditon,
3717 .mpo_system_check_swapoff = biba_system_check_swapoff,
3718 .mpo_system_check_swapon = biba_system_check_swapon,
3719 .mpo_system_check_sysctl = biba_system_check_sysctl,
3720
3721 .mpo_sysvmsg_cleanup = biba_sysvmsg_cleanup,
3722 .mpo_sysvmsg_create = biba_sysvmsg_create,
3723 .mpo_sysvmsg_destroy_label = biba_destroy_label,
3724 .mpo_sysvmsg_init_label = biba_init_label,
3725
3726 .mpo_sysvmsq_check_msgrcv = biba_sysvmsq_check_msgrcv,
3727 .mpo_sysvmsq_check_msgrmid = biba_sysvmsq_check_msgrmid,
3728 .mpo_sysvmsq_check_msqget = biba_sysvmsq_check_msqget,
3729 .mpo_sysvmsq_check_msqsnd = biba_sysvmsq_check_msqsnd,
3730 .mpo_sysvmsq_check_msqrcv = biba_sysvmsq_check_msqrcv,
3731 .mpo_sysvmsq_check_msqctl = biba_sysvmsq_check_msqctl,
3732 .mpo_sysvmsq_cleanup = biba_sysvmsq_cleanup,
3733 .mpo_sysvmsq_create = biba_sysvmsq_create,
3734 .mpo_sysvmsq_destroy_label = biba_destroy_label,
3735 .mpo_sysvmsq_init_label = biba_init_label,
3736
3737 .mpo_sysvsem_check_semctl = biba_sysvsem_check_semctl,
3738 .mpo_sysvsem_check_semget = biba_sysvsem_check_semget,
3739 .mpo_sysvsem_check_semop = biba_sysvsem_check_semop,
3740 .mpo_sysvsem_cleanup = biba_sysvsem_cleanup,
3741 .mpo_sysvsem_create = biba_sysvsem_create,
3742 .mpo_sysvsem_destroy_label = biba_destroy_label,
3743 .mpo_sysvsem_init_label = biba_init_label,
3744
3745 .mpo_sysvshm_check_shmat = biba_sysvshm_check_shmat,
3746 .mpo_sysvshm_check_shmctl = biba_sysvshm_check_shmctl,
3747 .mpo_sysvshm_check_shmget = biba_sysvshm_check_shmget,
3748 .mpo_sysvshm_cleanup = biba_sysvshm_cleanup,
3749 .mpo_sysvshm_create = biba_sysvshm_create,
3750 .mpo_sysvshm_destroy_label = biba_destroy_label,
3751 .mpo_sysvshm_init_label = biba_init_label,
3752
3753 .mpo_vnode_associate_extattr = biba_vnode_associate_extattr,
3754 .mpo_vnode_associate_singlelabel = biba_vnode_associate_singlelabel,
3755 .mpo_vnode_check_access = biba_vnode_check_open,
3756 .mpo_vnode_check_chdir = biba_vnode_check_chdir,
3757 .mpo_vnode_check_chroot = biba_vnode_check_chroot,
3758 .mpo_vnode_check_create = biba_vnode_check_create,
3759 .mpo_vnode_check_deleteacl = biba_vnode_check_deleteacl,
3760 .mpo_vnode_check_deleteextattr = biba_vnode_check_deleteextattr,
3761 .mpo_vnode_check_exec = biba_vnode_check_exec,
3762 .mpo_vnode_check_getacl = biba_vnode_check_getacl,
3763 .mpo_vnode_check_getextattr = biba_vnode_check_getextattr,
3764 .mpo_vnode_check_link = biba_vnode_check_link,
3765 .mpo_vnode_check_listextattr = biba_vnode_check_listextattr,
3766 .mpo_vnode_check_lookup = biba_vnode_check_lookup,
3767 .mpo_vnode_check_mmap = biba_vnode_check_mmap,
3768 .mpo_vnode_check_open = biba_vnode_check_open,
3769 .mpo_vnode_check_poll = biba_vnode_check_poll,
3770 .mpo_vnode_check_read = biba_vnode_check_read,
3771 .mpo_vnode_check_readdir = biba_vnode_check_readdir,
3772 .mpo_vnode_check_readlink = biba_vnode_check_readlink,
3773 .mpo_vnode_check_relabel = biba_vnode_check_relabel,
3774 .mpo_vnode_check_rename_from = biba_vnode_check_rename_from,
3775 .mpo_vnode_check_rename_to = biba_vnode_check_rename_to,
3776 .mpo_vnode_check_revoke = biba_vnode_check_revoke,
3777 .mpo_vnode_check_setacl = biba_vnode_check_setacl,
3778 .mpo_vnode_check_setextattr = biba_vnode_check_setextattr,
3779 .mpo_vnode_check_setflags = biba_vnode_check_setflags,
3780 .mpo_vnode_check_setmode = biba_vnode_check_setmode,
3781 .mpo_vnode_check_setowner = biba_vnode_check_setowner,
3782 .mpo_vnode_check_setutimes = biba_vnode_check_setutimes,
3783 .mpo_vnode_check_stat = biba_vnode_check_stat,
3784 .mpo_vnode_check_unlink = biba_vnode_check_unlink,
3785 .mpo_vnode_check_write = biba_vnode_check_write,
3786 .mpo_vnode_create_extattr = biba_vnode_create_extattr,
3787 .mpo_vnode_copy_label = biba_copy_label,
3788 .mpo_vnode_destroy_label = biba_destroy_label,
3789 .mpo_vnode_externalize_label = biba_externalize_label,
3790 .mpo_vnode_init_label = biba_init_label,
3791 .mpo_vnode_internalize_label = biba_internalize_label,
3792 .mpo_vnode_relabel = biba_vnode_relabel,
3793 .mpo_vnode_setlabel_extattr = biba_vnode_setlabel_extattr,
3794 };
3795
3796 MAC_POLICY_SET(&mac_biba_ops, mac_biba, "TrustedBSD MAC/Biba",
3797 MPC_LOADTIME_FLAG_NOTLATE, &biba_slot);
Cache object: 313ab35d7afbf710ffcc3aa250daf411
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