2 * Copyright (c) 1999-2002, 2007 Robert N. M. Watson
3 * Copyright (c) 2001-2005 Networks Associates Technology, Inc.
4 * Copyright (c) 2006 SPARTA, Inc.
7 * This software was developed by Robert Watson for the TrustedBSD Project.
9 * This software was developed for the FreeBSD Project in part by NAI Labs,
10 * the Security Research Division of Network Associates, Inc. under
11 * DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA
12 * CHATS research program.
14 * This software was enhanced by SPARTA ISSO under SPAWAR contract
15 * N66001-04-C-6019 ("SEFOS").
17 * Redistribution and use in source and binary forms, with or without
18 * modification, are permitted provided that the following conditions
20 * 1. Redistributions of source code must retain the above copyright
21 * notice, this list of conditions and the following disclaimer.
22 * 2. Redistributions in binary form must reproduce the above copyright
23 * notice, this list of conditions and the following disclaimer in the
24 * documentation and/or other materials provided with the distribution.
26 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
42 * Developed by the TrustedBSD Project.
44 * Low-watermark floating label mandatory integrity policy.
47 #include <sys/types.h>
48 #include <sys/param.h>
51 #include <sys/extattr.h>
52 #include <sys/kernel.h>
53 #include <sys/malloc.h>
55 #include <sys/mount.h>
59 #include <sys/systm.h>
60 #include <sys/sysproto.h>
61 #include <sys/sysent.h>
62 #include <sys/systm.h>
63 #include <sys/vnode.h>
65 #include <sys/socket.h>
66 #include <sys/socketvar.h>
69 #include <sys/sysctl.h>
70 #include <sys/syslog.h>
72 #include <fs/devfs/devfs.h>
74 #include <net/bpfdesc.h>
76 #include <net/if_types.h>
77 #include <net/if_var.h>
79 #include <netinet/in.h>
80 #include <netinet/in_pcb.h>
81 #include <netinet/ip_var.h>
85 #include <security/mac/mac_policy.h>
86 #include <security/mac/mac_framework.h>
87 #include <security/mac_lomac/mac_lomac.h>
89 struct mac_lomac_proc {
90 struct mac_lomac mac_lomac;
94 SYSCTL_DECL(_security_mac);
96 SYSCTL_NODE(_security_mac, OID_AUTO, lomac, CTLFLAG_RW, 0,
97 "TrustedBSD mac_lomac policy controls");
99 static int mac_lomac_label_size = sizeof(struct mac_lomac);
100 SYSCTL_INT(_security_mac_lomac, OID_AUTO, label_size, CTLFLAG_RD,
101 &mac_lomac_label_size, 0, "Size of struct mac_lomac");
103 static int mac_lomac_enabled = 1;
104 SYSCTL_INT(_security_mac_lomac, OID_AUTO, enabled, CTLFLAG_RW,
105 &mac_lomac_enabled, 0, "Enforce MAC/LOMAC policy");
106 TUNABLE_INT("security.mac.lomac.enabled", &mac_lomac_enabled);
108 static int destroyed_not_inited;
109 SYSCTL_INT(_security_mac_lomac, OID_AUTO, destroyed_not_inited, CTLFLAG_RD,
110 &destroyed_not_inited, 0, "Count of labels destroyed but not inited");
112 static int trust_all_interfaces = 0;
113 SYSCTL_INT(_security_mac_lomac, OID_AUTO, trust_all_interfaces, CTLFLAG_RD,
114 &trust_all_interfaces, 0, "Consider all interfaces 'trusted' by MAC/LOMAC");
115 TUNABLE_INT("security.mac.lomac.trust_all_interfaces", &trust_all_interfaces);
117 static char trusted_interfaces[128];
118 SYSCTL_STRING(_security_mac_lomac, OID_AUTO, trusted_interfaces, CTLFLAG_RD,
119 trusted_interfaces, 0, "Interfaces considered 'trusted' by MAC/LOMAC");
120 TUNABLE_STR("security.mac.lomac.trusted_interfaces", trusted_interfaces,
121 sizeof(trusted_interfaces));
123 static int ptys_equal = 0;
124 SYSCTL_INT(_security_mac_lomac, OID_AUTO, ptys_equal, CTLFLAG_RW,
125 &ptys_equal, 0, "Label pty devices as lomac/equal on create");
126 TUNABLE_INT("security.mac.lomac.ptys_equal", &ptys_equal);
128 static int revocation_enabled = 1;
129 SYSCTL_INT(_security_mac_lomac, OID_AUTO, revocation_enabled, CTLFLAG_RW,
130 &revocation_enabled, 0, "Revoke access to objects on relabel");
131 TUNABLE_INT("security.mac.lomac.revocation_enabled", &revocation_enabled);
133 static int mac_lomac_slot;
134 #define SLOT(l) ((struct mac_lomac *)mac_label_get((l), mac_lomac_slot))
135 #define SLOT_SET(l, val) mac_label_set((l), mac_lomac_slot, (uintptr_t)(val))
136 #define PSLOT(l) ((struct mac_lomac_proc *) \
137 mac_label_get((l), mac_lomac_slot))
138 #define PSLOT_SET(l, val) mac_label_set((l), mac_lomac_slot, (uintptr_t)(val))
140 MALLOC_DEFINE(M_MACLOMAC, "mac_lomac_label", "MAC/LOMAC labels");
142 static struct mac_lomac *
143 lomac_alloc(int flag)
145 struct mac_lomac *mac_lomac;
147 mac_lomac = malloc(sizeof(struct mac_lomac), M_MACLOMAC, M_ZERO | flag);
153 lomac_free(struct mac_lomac *mac_lomac)
156 if (mac_lomac != NULL)
157 free(mac_lomac, M_MACLOMAC);
159 atomic_add_int(&destroyed_not_inited, 1);
163 lomac_atmostflags(struct mac_lomac *mac_lomac, int flags)
166 if ((mac_lomac->ml_flags & flags) != mac_lomac->ml_flags)
172 mac_lomac_dominate_element(struct mac_lomac_element *a,
173 struct mac_lomac_element *b)
176 switch (a->mle_type) {
177 case MAC_LOMAC_TYPE_EQUAL:
178 case MAC_LOMAC_TYPE_HIGH:
181 case MAC_LOMAC_TYPE_LOW:
182 switch (b->mle_type) {
183 case MAC_LOMAC_TYPE_GRADE:
184 case MAC_LOMAC_TYPE_HIGH:
187 case MAC_LOMAC_TYPE_EQUAL:
188 case MAC_LOMAC_TYPE_LOW:
192 panic("mac_lomac_dominate_element: b->mle_type invalid");
195 case MAC_LOMAC_TYPE_GRADE:
196 switch (b->mle_type) {
197 case MAC_LOMAC_TYPE_EQUAL:
198 case MAC_LOMAC_TYPE_LOW:
201 case MAC_LOMAC_TYPE_HIGH:
204 case MAC_LOMAC_TYPE_GRADE:
205 return (a->mle_grade >= b->mle_grade);
208 panic("mac_lomac_dominate_element: b->mle_type invalid");
212 panic("mac_lomac_dominate_element: a->mle_type invalid");
217 mac_lomac_range_in_range(struct mac_lomac *rangea, struct mac_lomac *rangeb)
220 return (mac_lomac_dominate_element(&rangeb->ml_rangehigh,
221 &rangea->ml_rangehigh) &&
222 mac_lomac_dominate_element(&rangea->ml_rangelow,
223 &rangeb->ml_rangelow));
227 mac_lomac_single_in_range(struct mac_lomac *single, struct mac_lomac *range)
230 KASSERT((single->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
231 ("mac_lomac_single_in_range: a not single"));
232 KASSERT((range->ml_flags & MAC_LOMAC_FLAG_RANGE) != 0,
233 ("mac_lomac_single_in_range: b not range"));
235 return (mac_lomac_dominate_element(&range->ml_rangehigh,
236 &single->ml_single) &&
237 mac_lomac_dominate_element(&single->ml_single,
238 &range->ml_rangelow));
242 mac_lomac_auxsingle_in_range(struct mac_lomac *single, struct mac_lomac *range)
245 KASSERT((single->ml_flags & MAC_LOMAC_FLAG_AUX) != 0,
246 ("mac_lomac_single_in_range: a not auxsingle"));
247 KASSERT((range->ml_flags & MAC_LOMAC_FLAG_RANGE) != 0,
248 ("mac_lomac_single_in_range: b not range"));
250 return (mac_lomac_dominate_element(&range->ml_rangehigh,
251 &single->ml_auxsingle) &&
252 mac_lomac_dominate_element(&single->ml_auxsingle,
253 &range->ml_rangelow));
257 mac_lomac_dominate_single(struct mac_lomac *a, struct mac_lomac *b)
259 KASSERT((a->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
260 ("mac_lomac_dominate_single: a not single"));
261 KASSERT((b->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
262 ("mac_lomac_dominate_single: b not single"));
264 return (mac_lomac_dominate_element(&a->ml_single, &b->ml_single));
268 mac_lomac_subject_dominate(struct mac_lomac *a, struct mac_lomac *b)
270 KASSERT((~a->ml_flags &
271 (MAC_LOMAC_FLAG_SINGLE | MAC_LOMAC_FLAG_RANGE)) == 0,
272 ("mac_lomac_dominate_single: a not subject"));
273 KASSERT((b->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
274 ("mac_lomac_dominate_single: b not single"));
276 return (mac_lomac_dominate_element(&a->ml_rangehigh,
281 mac_lomac_equal_element(struct mac_lomac_element *a, struct mac_lomac_element *b)
284 if (a->mle_type == MAC_LOMAC_TYPE_EQUAL ||
285 b->mle_type == MAC_LOMAC_TYPE_EQUAL)
288 return (a->mle_type == b->mle_type && a->mle_grade == b->mle_grade);
292 mac_lomac_equal_single(struct mac_lomac *a, struct mac_lomac *b)
295 KASSERT((a->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
296 ("mac_lomac_equal_single: a not single"));
297 KASSERT((b->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
298 ("mac_lomac_equal_single: b not single"));
300 return (mac_lomac_equal_element(&a->ml_single, &b->ml_single));
304 mac_lomac_contains_equal(struct mac_lomac *mac_lomac)
307 if (mac_lomac->ml_flags & MAC_LOMAC_FLAG_SINGLE)
308 if (mac_lomac->ml_single.mle_type == MAC_LOMAC_TYPE_EQUAL)
310 if (mac_lomac->ml_flags & MAC_LOMAC_FLAG_AUX)
311 if (mac_lomac->ml_auxsingle.mle_type == MAC_LOMAC_TYPE_EQUAL)
314 if (mac_lomac->ml_flags & MAC_LOMAC_FLAG_RANGE) {
315 if (mac_lomac->ml_rangelow.mle_type == MAC_LOMAC_TYPE_EQUAL)
317 if (mac_lomac->ml_rangehigh.mle_type == MAC_LOMAC_TYPE_EQUAL)
325 mac_lomac_subject_privileged(struct mac_lomac *mac_lomac)
328 KASSERT((mac_lomac->ml_flags & MAC_LOMAC_FLAGS_BOTH) ==
329 MAC_LOMAC_FLAGS_BOTH,
330 ("mac_lomac_subject_privileged: subject doesn't have both labels"));
332 /* If the single is EQUAL, it's ok. */
333 if (mac_lomac->ml_single.mle_type == MAC_LOMAC_TYPE_EQUAL)
336 /* If either range endpoint is EQUAL, it's ok. */
337 if (mac_lomac->ml_rangelow.mle_type == MAC_LOMAC_TYPE_EQUAL ||
338 mac_lomac->ml_rangehigh.mle_type == MAC_LOMAC_TYPE_EQUAL)
341 /* If the range is low-high, it's ok. */
342 if (mac_lomac->ml_rangelow.mle_type == MAC_LOMAC_TYPE_LOW &&
343 mac_lomac->ml_rangehigh.mle_type == MAC_LOMAC_TYPE_HIGH)
351 mac_lomac_high_single(struct mac_lomac *mac_lomac)
354 KASSERT((mac_lomac->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
355 ("mac_lomac_high_single: mac_lomac not single"));
357 return (mac_lomac->ml_single.mle_type == MAC_LOMAC_TYPE_HIGH);
361 mac_lomac_valid(struct mac_lomac *mac_lomac)
364 if (mac_lomac->ml_flags & MAC_LOMAC_FLAG_SINGLE) {
365 switch (mac_lomac->ml_single.mle_type) {
366 case MAC_LOMAC_TYPE_GRADE:
367 case MAC_LOMAC_TYPE_EQUAL:
368 case MAC_LOMAC_TYPE_HIGH:
369 case MAC_LOMAC_TYPE_LOW:
376 if (mac_lomac->ml_single.mle_type != MAC_LOMAC_TYPE_UNDEF)
380 if (mac_lomac->ml_flags & MAC_LOMAC_FLAG_AUX) {
381 switch (mac_lomac->ml_auxsingle.mle_type) {
382 case MAC_LOMAC_TYPE_GRADE:
383 case MAC_LOMAC_TYPE_EQUAL:
384 case MAC_LOMAC_TYPE_HIGH:
385 case MAC_LOMAC_TYPE_LOW:
392 if (mac_lomac->ml_auxsingle.mle_type != MAC_LOMAC_TYPE_UNDEF)
396 if (mac_lomac->ml_flags & MAC_LOMAC_FLAG_RANGE) {
397 switch (mac_lomac->ml_rangelow.mle_type) {
398 case MAC_LOMAC_TYPE_GRADE:
399 case MAC_LOMAC_TYPE_EQUAL:
400 case MAC_LOMAC_TYPE_HIGH:
401 case MAC_LOMAC_TYPE_LOW:
408 switch (mac_lomac->ml_rangehigh.mle_type) {
409 case MAC_LOMAC_TYPE_GRADE:
410 case MAC_LOMAC_TYPE_EQUAL:
411 case MAC_LOMAC_TYPE_HIGH:
412 case MAC_LOMAC_TYPE_LOW:
418 if (!mac_lomac_dominate_element(&mac_lomac->ml_rangehigh,
419 &mac_lomac->ml_rangelow))
422 if (mac_lomac->ml_rangelow.mle_type != MAC_LOMAC_TYPE_UNDEF ||
423 mac_lomac->ml_rangehigh.mle_type != MAC_LOMAC_TYPE_UNDEF)
431 mac_lomac_set_range(struct mac_lomac *mac_lomac, u_short typelow,
432 u_short gradelow, u_short typehigh, u_short gradehigh)
435 mac_lomac->ml_rangelow.mle_type = typelow;
436 mac_lomac->ml_rangelow.mle_grade = gradelow;
437 mac_lomac->ml_rangehigh.mle_type = typehigh;
438 mac_lomac->ml_rangehigh.mle_grade = gradehigh;
439 mac_lomac->ml_flags |= MAC_LOMAC_FLAG_RANGE;
443 mac_lomac_set_single(struct mac_lomac *mac_lomac, u_short type, u_short grade)
446 mac_lomac->ml_single.mle_type = type;
447 mac_lomac->ml_single.mle_grade = grade;
448 mac_lomac->ml_flags |= MAC_LOMAC_FLAG_SINGLE;
452 mac_lomac_copy_range(struct mac_lomac *labelfrom, struct mac_lomac *labelto)
455 KASSERT((labelfrom->ml_flags & MAC_LOMAC_FLAG_RANGE) != 0,
456 ("mac_lomac_copy_range: labelfrom not range"));
458 labelto->ml_rangelow = labelfrom->ml_rangelow;
459 labelto->ml_rangehigh = labelfrom->ml_rangehigh;
460 labelto->ml_flags |= MAC_LOMAC_FLAG_RANGE;
464 mac_lomac_copy_single(struct mac_lomac *labelfrom, struct mac_lomac *labelto)
467 KASSERT((labelfrom->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
468 ("mac_lomac_copy_single: labelfrom not single"));
470 labelto->ml_single = labelfrom->ml_single;
471 labelto->ml_flags |= MAC_LOMAC_FLAG_SINGLE;
475 mac_lomac_copy_auxsingle(struct mac_lomac *labelfrom, struct mac_lomac *labelto)
478 KASSERT((labelfrom->ml_flags & MAC_LOMAC_FLAG_AUX) != 0,
479 ("mac_lomac_copy_auxsingle: labelfrom not auxsingle"));
481 labelto->ml_auxsingle = labelfrom->ml_auxsingle;
482 labelto->ml_flags |= MAC_LOMAC_FLAG_AUX;
486 mac_lomac_copy(struct mac_lomac *source, struct mac_lomac *dest)
489 if (source->ml_flags & MAC_LOMAC_FLAG_SINGLE)
490 mac_lomac_copy_single(source, dest);
491 if (source->ml_flags & MAC_LOMAC_FLAG_AUX)
492 mac_lomac_copy_auxsingle(source, dest);
493 if (source->ml_flags & MAC_LOMAC_FLAG_RANGE)
494 mac_lomac_copy_range(source, dest);
497 static int mac_lomac_to_string(struct sbuf *sb,
498 struct mac_lomac *mac_lomac);
501 maybe_demote(struct mac_lomac *subjlabel, struct mac_lomac *objlabel,
502 const char *actionname, const char *objname, struct vnode *vp)
504 struct sbuf subjlabel_sb, subjtext_sb, objlabel_sb;
505 char *subjlabeltext, *objlabeltext, *subjtext;
506 struct mac_lomac cached_subjlabel;
507 struct mac_lomac_proc *subj;
512 subj = PSLOT(curthread->td_proc->p_label);
514 p = curthread->td_proc;
515 mtx_lock(&subj->mtx);
516 if (subj->mac_lomac.ml_flags & MAC_LOMAC_FLAG_UPDATE) {
518 * Check to see if the pending demotion would be more or
519 * less severe than this one, and keep the more severe.
520 * This can only happen for a multi-threaded application.
522 if (mac_lomac_dominate_single(objlabel, &subj->mac_lomac)) {
523 mtx_unlock(&subj->mtx);
527 bzero(&subj->mac_lomac, sizeof(subj->mac_lomac));
529 * Always demote the single label.
531 mac_lomac_copy_single(objlabel, &subj->mac_lomac);
533 * Start with the original range, then minimize each side of
534 * the range to the point of not dominating the object. The
535 * high side will always be demoted, of course.
537 mac_lomac_copy_range(subjlabel, &subj->mac_lomac);
538 if (!mac_lomac_dominate_element(&objlabel->ml_single,
539 &subj->mac_lomac.ml_rangelow))
540 subj->mac_lomac.ml_rangelow = objlabel->ml_single;
541 subj->mac_lomac.ml_rangehigh = objlabel->ml_single;
542 subj->mac_lomac.ml_flags |= MAC_LOMAC_FLAG_UPDATE;
543 thread_lock(curthread);
544 curthread->td_flags |= TDF_ASTPENDING | TDF_MACPEND;
545 thread_unlock(curthread);
548 * Avoid memory allocation while holding a mutex; cache the
551 mac_lomac_copy_single(&subj->mac_lomac, &cached_subjlabel);
552 mtx_unlock(&subj->mtx);
554 sbuf_new(&subjlabel_sb, NULL, 0, SBUF_AUTOEXTEND);
555 mac_lomac_to_string(&subjlabel_sb, subjlabel);
556 sbuf_finish(&subjlabel_sb);
557 subjlabeltext = sbuf_data(&subjlabel_sb);
559 sbuf_new(&subjtext_sb, NULL, 0, SBUF_AUTOEXTEND);
560 mac_lomac_to_string(&subjtext_sb, &subj->mac_lomac);
561 sbuf_finish(&subjtext_sb);
562 subjtext = sbuf_data(&subjtext_sb);
564 sbuf_new(&objlabel_sb, NULL, 0, SBUF_AUTOEXTEND);
565 mac_lomac_to_string(&objlabel_sb, objlabel);
566 sbuf_finish(&objlabel_sb);
567 objlabeltext = sbuf_data(&objlabel_sb);
569 pgid = p->p_pgrp->pg_id; /* XXX could be stale? */
570 if (vp != NULL && VOP_GETATTR(vp, &va, curthread->td_ucred,
572 log(LOG_INFO, "LOMAC: level-%s subject p%dg%du%d:%s demoted to"
573 " level %s after %s a level-%s %s (inode=%ld, "
575 subjlabeltext, p->p_pid, pgid, curthread->td_ucred->cr_uid,
576 p->p_comm, subjtext, actionname, objlabeltext, objname,
577 va.va_fileid, vp->v_mount->mnt_stat.f_mntonname);
579 log(LOG_INFO, "LOMAC: level-%s subject p%dg%du%d:%s demoted to"
580 " level %s after %s a level-%s %s\n",
581 subjlabeltext, p->p_pid, pgid, curthread->td_ucred->cr_uid,
582 p->p_comm, subjtext, actionname, objlabeltext, objname);
585 sbuf_delete(&subjlabel_sb);
586 sbuf_delete(&subjtext_sb);
587 sbuf_delete(&objlabel_sb);
593 * Relabel "to" to "from" only if "from" is a valid label (contains
594 * at least a single), as for a relabel operation which may or may
595 * not involve a relevant label.
598 try_relabel(struct mac_lomac *from, struct mac_lomac *to)
601 if (from->ml_flags & MAC_LOMAC_FLAG_SINGLE) {
602 bzero(to, sizeof(*to));
603 mac_lomac_copy(from, to);
608 * Policy module operations.
611 mac_lomac_init(struct mac_policy_conf *conf)
620 mac_lomac_init_label(struct label *label)
623 SLOT_SET(label, lomac_alloc(M_WAITOK));
627 mac_lomac_init_label_waitcheck(struct label *label, int flag)
630 SLOT_SET(label, lomac_alloc(flag));
631 if (SLOT(label) == NULL)
638 mac_lomac_proc_init_label(struct label *label)
641 PSLOT_SET(label, malloc(sizeof(struct mac_lomac_proc), M_MACLOMAC,
643 mtx_init(&PSLOT(label)->mtx, "MAC/Lomac proc lock", NULL, MTX_DEF);
647 mac_lomac_destroy_label(struct label *label)
650 lomac_free(SLOT(label));
651 SLOT_SET(label, NULL);
655 mac_lomac_proc_destroy_label(struct label *label)
658 mtx_destroy(&PSLOT(label)->mtx);
659 FREE(PSLOT(label), M_MACLOMAC);
660 PSLOT_SET(label, NULL);
664 mac_lomac_element_to_string(struct sbuf *sb, struct mac_lomac_element *element)
667 switch (element->mle_type) {
668 case MAC_LOMAC_TYPE_HIGH:
669 return (sbuf_printf(sb, "high"));
671 case MAC_LOMAC_TYPE_LOW:
672 return (sbuf_printf(sb, "low"));
674 case MAC_LOMAC_TYPE_EQUAL:
675 return (sbuf_printf(sb, "equal"));
677 case MAC_LOMAC_TYPE_GRADE:
678 return (sbuf_printf(sb, "%d", element->mle_grade));
681 panic("mac_lomac_element_to_string: invalid type (%d)",
687 mac_lomac_to_string(struct sbuf *sb, struct mac_lomac *mac_lomac)
690 if (mac_lomac->ml_flags & MAC_LOMAC_FLAG_SINGLE) {
691 if (mac_lomac_element_to_string(sb, &mac_lomac->ml_single)
696 if (mac_lomac->ml_flags & MAC_LOMAC_FLAG_AUX) {
697 if (sbuf_putc(sb, '[') == -1)
700 if (mac_lomac_element_to_string(sb, &mac_lomac->ml_auxsingle)
704 if (sbuf_putc(sb, ']') == -1)
708 if (mac_lomac->ml_flags & MAC_LOMAC_FLAG_RANGE) {
709 if (sbuf_putc(sb, '(') == -1)
712 if (mac_lomac_element_to_string(sb, &mac_lomac->ml_rangelow)
716 if (sbuf_putc(sb, '-') == -1)
719 if (mac_lomac_element_to_string(sb, &mac_lomac->ml_rangehigh)
723 if (sbuf_putc(sb, ')') == -1)
731 mac_lomac_externalize_label(struct label *label, char *element_name,
732 struct sbuf *sb, int *claimed)
734 struct mac_lomac *mac_lomac;
736 if (strcmp(MAC_LOMAC_LABEL_NAME, element_name) != 0)
741 mac_lomac = SLOT(label);
743 return (mac_lomac_to_string(sb, mac_lomac));
747 mac_lomac_parse_element(struct mac_lomac_element *element, char *string)
750 if (strcmp(string, "high") == 0 ||
751 strcmp(string, "hi") == 0) {
752 element->mle_type = MAC_LOMAC_TYPE_HIGH;
753 element->mle_grade = MAC_LOMAC_TYPE_UNDEF;
754 } else if (strcmp(string, "low") == 0 ||
755 strcmp(string, "lo") == 0) {
756 element->mle_type = MAC_LOMAC_TYPE_LOW;
757 element->mle_grade = MAC_LOMAC_TYPE_UNDEF;
758 } else if (strcmp(string, "equal") == 0 ||
759 strcmp(string, "eq") == 0) {
760 element->mle_type = MAC_LOMAC_TYPE_EQUAL;
761 element->mle_grade = MAC_LOMAC_TYPE_UNDEF;
767 d = strtol(p0, &p1, 10);
769 if (d < 0 || d > 65535)
771 element->mle_type = MAC_LOMAC_TYPE_GRADE;
772 element->mle_grade = d;
774 if (p1 == p0 || *p1 != '\0')
782 * Note: destructively consumes the string, make a local copy before
783 * calling if that's a problem.
786 mac_lomac_parse(struct mac_lomac *mac_lomac, char *string)
788 char *range, *rangeend, *rangehigh, *rangelow, *single, *auxsingle,
792 /* Do we have a range? */
794 range = index(string, '(');
797 auxsingle = index(string, '[');
798 if (auxsingle == single)
800 if (range != NULL && auxsingle != NULL)
802 rangelow = rangehigh = NULL;
804 /* Nul terminate the end of the single string. */
808 rangehigh = index(rangelow, '-');
809 if (rangehigh == NULL)
812 if (*rangelow == '\0' || *rangehigh == '\0')
814 rangeend = index(rangehigh, ')');
815 if (rangeend == NULL)
817 if (*(rangeend + 1) != '\0')
819 /* Nul terminate the ends of the ranges. */
820 *(rangehigh - 1) = '\0';
823 KASSERT((rangelow != NULL && rangehigh != NULL) ||
824 (rangelow == NULL && rangehigh == NULL),
825 ("mac_lomac_internalize_label: range mismatch"));
826 if (auxsingle != NULL) {
827 /* Nul terminate the end of the single string. */
830 auxsingleend = index(auxsingle, ']');
831 if (auxsingleend == NULL)
833 if (*(auxsingleend + 1) != '\0')
835 /* Nul terminate the end of the auxsingle. */
836 *auxsingleend = '\0';
839 bzero(mac_lomac, sizeof(*mac_lomac));
840 if (single != NULL) {
841 error = mac_lomac_parse_element(&mac_lomac->ml_single, single);
844 mac_lomac->ml_flags |= MAC_LOMAC_FLAG_SINGLE;
847 if (auxsingle != NULL) {
848 error = mac_lomac_parse_element(&mac_lomac->ml_auxsingle,
852 mac_lomac->ml_flags |= MAC_LOMAC_FLAG_AUX;
855 if (rangelow != NULL) {
856 error = mac_lomac_parse_element(&mac_lomac->ml_rangelow,
860 error = mac_lomac_parse_element(&mac_lomac->ml_rangehigh,
864 mac_lomac->ml_flags |= MAC_LOMAC_FLAG_RANGE;
867 error = mac_lomac_valid(mac_lomac);
875 mac_lomac_internalize_label(struct label *label, char *element_name,
876 char *element_data, int *claimed)
878 struct mac_lomac *mac_lomac, mac_lomac_temp;
881 if (strcmp(MAC_LOMAC_LABEL_NAME, element_name) != 0)
886 error = mac_lomac_parse(&mac_lomac_temp, element_data);
890 mac_lomac = SLOT(label);
891 *mac_lomac = mac_lomac_temp;
897 mac_lomac_copy_label(struct label *src, struct label *dest)
900 *SLOT(dest) = *SLOT(src);
904 * Labeling event operations: file system objects, and things that look
905 * a lot like file system objects.
908 mac_lomac_devfs_create_device(struct ucred *cred, struct mount *mp,
909 struct cdev *dev, struct devfs_dirent *de, struct label *delabel)
911 struct mac_lomac *mac_lomac;
914 mac_lomac = SLOT(delabel);
915 if (strcmp(dev->si_name, "null") == 0 ||
916 strcmp(dev->si_name, "zero") == 0 ||
917 strcmp(dev->si_name, "random") == 0 ||
918 strncmp(dev->si_name, "fd/", strlen("fd/")) == 0 ||
919 strncmp(dev->si_name, "ttyv", strlen("ttyv")) == 0)
920 lomac_type = MAC_LOMAC_TYPE_EQUAL;
921 else if (ptys_equal &&
922 (strncmp(dev->si_name, "ttyp", strlen("ttyp")) == 0 ||
923 strncmp(dev->si_name, "ptyp", strlen("ptyp")) == 0))
924 lomac_type = MAC_LOMAC_TYPE_EQUAL;
926 lomac_type = MAC_LOMAC_TYPE_HIGH;
927 mac_lomac_set_single(mac_lomac, lomac_type, 0);
931 mac_lomac_devfs_create_directory(struct mount *mp, char *dirname,
932 int dirnamelen, struct devfs_dirent *de, struct label *delabel)
934 struct mac_lomac *mac_lomac;
936 mac_lomac = SLOT(delabel);
937 mac_lomac_set_single(mac_lomac, MAC_LOMAC_TYPE_HIGH, 0);
941 mac_lomac_devfs_create_symlink(struct ucred *cred, struct mount *mp,
942 struct devfs_dirent *dd, struct label *ddlabel, struct devfs_dirent *de,
943 struct label *delabel)
945 struct mac_lomac *source, *dest;
947 source = SLOT(cred->cr_label);
948 dest = SLOT(delabel);
950 mac_lomac_copy_single(source, dest);
954 mac_lomac_mount_create(struct ucred *cred, struct mount *mp,
955 struct label *mplabel)
957 struct mac_lomac *source, *dest;
959 source = SLOT(cred->cr_label);
960 dest = SLOT(mplabel);
961 mac_lomac_copy_single(source, dest);
965 mac_lomac_vnode_relabel(struct ucred *cred, struct vnode *vp,
966 struct label *vplabel, struct label *newlabel)
968 struct mac_lomac *source, *dest;
970 source = SLOT(newlabel);
971 dest = SLOT(vplabel);
973 try_relabel(source, dest);
977 mac_lomac_devfs_update(struct mount *mp, struct devfs_dirent *de,
978 struct label *delabel, struct vnode *vp, struct label *vplabel)
980 struct mac_lomac *source, *dest;
982 source = SLOT(vplabel);
983 dest = SLOT(delabel);
985 mac_lomac_copy(source, dest);
989 mac_lomac_devfs_vnode_associate(struct mount *mp, struct label *mplabel,
990 struct devfs_dirent *de, struct label *delabel, struct vnode *vp,
991 struct label *vplabel)
993 struct mac_lomac *source, *dest;
995 source = SLOT(delabel);
996 dest = SLOT(vplabel);
998 mac_lomac_copy_single(source, dest);
1002 mac_lomac_vnode_associate_extattr(struct mount *mp, struct label *mplabel,
1003 struct vnode *vp, struct label *vplabel)
1005 struct mac_lomac temp, *source, *dest;
1008 source = SLOT(mplabel);
1009 dest = SLOT(vplabel);
1011 buflen = sizeof(temp);
1012 bzero(&temp, buflen);
1014 error = vn_extattr_get(vp, IO_NODELOCKED, MAC_LOMAC_EXTATTR_NAMESPACE,
1015 MAC_LOMAC_EXTATTR_NAME, &buflen, (char *)&temp, curthread);
1016 if (error == ENOATTR || error == EOPNOTSUPP) {
1017 /* Fall back to the mntlabel. */
1018 mac_lomac_copy_single(source, dest);
1023 if (buflen != sizeof(temp)) {
1024 if (buflen != sizeof(temp) - sizeof(temp.ml_auxsingle)) {
1025 printf("mac_lomac_vnode_associate_extattr: bad size %d\n",
1029 bzero(&temp.ml_auxsingle, sizeof(temp.ml_auxsingle));
1030 buflen = sizeof(temp);
1031 (void)vn_extattr_set(vp, IO_NODELOCKED,
1032 MAC_LOMAC_EXTATTR_NAMESPACE, MAC_LOMAC_EXTATTR_NAME,
1033 buflen, (char *)&temp, curthread);
1035 if (mac_lomac_valid(&temp) != 0) {
1036 printf("mac_lomac_vnode_associate_extattr: invalid\n");
1039 if ((temp.ml_flags & MAC_LOMAC_FLAGS_BOTH) != MAC_LOMAC_FLAG_SINGLE) {
1040 printf("mac_lomac_vnode_associate_extattr: not single\n");
1044 mac_lomac_copy_single(&temp, dest);
1049 mac_lomac_vnode_associate_singlelabel(struct mount *mp,
1050 struct label *mplabel, struct vnode *vp, struct label *vplabel)
1052 struct mac_lomac *source, *dest;
1054 source = SLOT(mplabel);
1055 dest = SLOT(vplabel);
1057 mac_lomac_copy_single(source, dest);
1061 mac_lomac_vnode_create_extattr(struct ucred *cred, struct mount *mp,
1062 struct label *mplabel, struct vnode *dvp, struct label *dvplabel,
1063 struct vnode *vp, struct label *vplabel, struct componentname *cnp)
1065 struct mac_lomac *source, *dest, *dir, temp;
1069 buflen = sizeof(temp);
1070 bzero(&temp, buflen);
1072 source = SLOT(cred->cr_label);
1073 dest = SLOT(vplabel);
1074 dir = SLOT(dvplabel);
1075 if (dir->ml_flags & MAC_LOMAC_FLAG_AUX) {
1076 mac_lomac_copy_auxsingle(dir, &temp);
1077 mac_lomac_set_single(&temp, dir->ml_auxsingle.mle_type,
1078 dir->ml_auxsingle.mle_grade);
1080 mac_lomac_copy_single(source, &temp);
1083 error = vn_extattr_set(vp, IO_NODELOCKED, MAC_LOMAC_EXTATTR_NAMESPACE,
1084 MAC_LOMAC_EXTATTR_NAME, buflen, (char *)&temp, curthread);
1086 mac_lomac_copy(&temp, dest);
1091 mac_lomac_vnode_setlabel_extattr(struct ucred *cred, struct vnode *vp,
1092 struct label *vplabel, struct label *intlabel)
1094 struct mac_lomac *source, temp;
1098 buflen = sizeof(temp);
1099 bzero(&temp, buflen);
1101 source = SLOT(intlabel);
1102 if ((source->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0)
1105 mac_lomac_copy_single(source, &temp);
1106 error = vn_extattr_set(vp, IO_NODELOCKED, MAC_LOMAC_EXTATTR_NAMESPACE,
1107 MAC_LOMAC_EXTATTR_NAME, buflen, (char *)&temp, curthread);
1112 * Labeling event operations: IPC object.
1115 mac_lomac_inpcb_create(struct socket *so, struct label *solabel,
1116 struct inpcb *inp, struct label *inplabel)
1118 struct mac_lomac *source, *dest;
1120 source = SLOT(solabel);
1121 dest = SLOT(inplabel);
1123 mac_lomac_copy_single(source, dest);
1127 mac_lomac_socket_create_mbuf(struct socket *so, struct label *solabel,
1128 struct mbuf *m, struct label *mlabel)
1130 struct mac_lomac *source, *dest;
1132 source = SLOT(solabel);
1133 dest = SLOT(mlabel);
1135 mac_lomac_copy_single(source, dest);
1139 mac_lomac_socket_create(struct ucred *cred, struct socket *so,
1140 struct label *solabel)
1142 struct mac_lomac *source, *dest;
1144 source = SLOT(cred->cr_label);
1145 dest = SLOT(solabel);
1147 mac_lomac_copy_single(source, dest);
1151 mac_lomac_pipe_create(struct ucred *cred, struct pipepair *pp,
1152 struct label *pplabel)
1154 struct mac_lomac *source, *dest;
1156 source = SLOT(cred->cr_label);
1157 dest = SLOT(pplabel);
1159 mac_lomac_copy_single(source, dest);
1163 mac_lomac_socket_newconn(struct socket *oldso, struct label *oldsolabel,
1164 struct socket *newso, struct label *newsolabel)
1166 struct mac_lomac *source, *dest;
1168 source = SLOT(oldsolabel);
1169 dest = SLOT(newsolabel);
1171 mac_lomac_copy_single(source, dest);
1175 mac_lomac_socket_relabel(struct ucred *cred, struct socket *so,
1176 struct label *solabel, struct label *newlabel)
1178 struct mac_lomac *source, *dest;
1180 source = SLOT(newlabel);
1181 dest = SLOT(solabel);
1183 try_relabel(source, dest);
1187 mac_lomac_pipe_relabel(struct ucred *cred, struct pipepair *pp,
1188 struct label *pplabel, struct label *newlabel)
1190 struct mac_lomac *source, *dest;
1192 source = SLOT(newlabel);
1193 dest = SLOT(pplabel);
1195 try_relabel(source, dest);
1199 mac_lomac_socketpeer_set_from_mbuf(struct mbuf *m, struct label *mlabel,
1200 struct socket *so, struct label *sopeerlabel)
1202 struct mac_lomac *source, *dest;
1204 source = SLOT(mlabel);
1205 dest = SLOT(sopeerlabel);
1207 mac_lomac_copy_single(source, dest);
1211 * Labeling event operations: network objects.
1214 mac_lomac_socketpeer_set_from_socket(struct socket *oldso,
1215 struct label *oldsolabel, struct socket *newso,
1216 struct label *newsopeerlabel)
1218 struct mac_lomac *source, *dest;
1220 source = SLOT(oldsolabel);
1221 dest = SLOT(newsopeerlabel);
1223 mac_lomac_copy_single(source, dest);
1227 mac_lomac_bpfdesc_create(struct ucred *cred, struct bpf_d *d,
1228 struct label *dlabel)
1230 struct mac_lomac *source, *dest;
1232 source = SLOT(cred->cr_label);
1233 dest = SLOT(dlabel);
1235 mac_lomac_copy_single(source, dest);
1239 mac_lomac_ifnet_create(struct ifnet *ifp, struct label *ifplabel)
1241 char tifname[IFNAMSIZ], *p, *q;
1242 char tiflist[sizeof(trusted_interfaces)];
1243 struct mac_lomac *dest;
1246 dest = SLOT(ifplabel);
1248 if (ifp->if_type == IFT_LOOP) {
1249 grade = MAC_LOMAC_TYPE_EQUAL;
1253 if (trust_all_interfaces) {
1254 grade = MAC_LOMAC_TYPE_HIGH;
1258 grade = MAC_LOMAC_TYPE_LOW;
1260 if (trusted_interfaces[0] == '\0' ||
1261 !strvalid(trusted_interfaces, sizeof(trusted_interfaces)))
1264 bzero(tiflist, sizeof(tiflist));
1265 for (p = trusted_interfaces, q = tiflist; *p != '\0'; p++, q++)
1266 if(*p != ' ' && *p != '\t')
1269 for (p = q = tiflist;; p++) {
1270 if (*p == ',' || *p == '\0') {
1272 if (len < IFNAMSIZ) {
1273 bzero(tifname, sizeof(tifname));
1274 bcopy(q, tifname, len);
1275 if (strcmp(tifname, ifp->if_xname) == 0) {
1276 grade = MAC_LOMAC_TYPE_HIGH;
1282 printf("MAC/LOMAC warning: interface name "
1283 "\"%s\" is too long (must be < %d)\n",
1292 mac_lomac_set_single(dest, grade, 0);
1293 mac_lomac_set_range(dest, grade, 0, grade, 0);
1297 mac_lomac_ipq_create(struct mbuf *m, struct label *mlabel, struct ipq *ipq,
1298 struct label *ipqlabel)
1300 struct mac_lomac *source, *dest;
1302 source = SLOT(mlabel);
1303 dest = SLOT(ipqlabel);
1305 mac_lomac_copy_single(source, dest);
1309 mac_lomac_ipq_reassemble(struct ipq *ipq, struct label *ipqlabel,
1310 struct mbuf *m, struct label *mlabel)
1312 struct mac_lomac *source, *dest;
1314 source = SLOT(ipqlabel);
1315 dest = SLOT(mlabel);
1317 /* Just use the head, since we require them all to match. */
1318 mac_lomac_copy_single(source, dest);
1322 mac_lomac_netinet_fragment(struct mbuf *m, struct label *mlabel,
1323 struct mbuf *frag, struct label *fraglabel)
1325 struct mac_lomac *source, *dest;
1327 source = SLOT(mlabel);
1328 dest = SLOT(fraglabel);
1330 mac_lomac_copy_single(source, dest);
1334 mac_lomac_inpcb_create_mbuf(struct inpcb *inp, struct label *inplabel,
1335 struct mbuf *m, struct label *mlabel)
1337 struct mac_lomac *source, *dest;
1339 source = SLOT(inplabel);
1340 dest = SLOT(mlabel);
1342 mac_lomac_copy_single(source, dest);
1346 mac_lomac_create_mbuf_linklayer(struct ifnet *ifp, struct label *ifplabel,
1347 struct mbuf *m, struct label *mlabel)
1349 struct mac_lomac *dest;
1351 dest = SLOT(mlabel);
1353 mac_lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0);
1357 mac_lomac_bpfdesc_create_mbuf(struct bpf_d *d, struct label *dlabel,
1358 struct mbuf *m, struct label *mlabel)
1360 struct mac_lomac *source, *dest;
1362 source = SLOT(dlabel);
1363 dest = SLOT(mlabel);
1365 mac_lomac_copy_single(source, dest);
1369 mac_lomac_ifnet_create_mbuf(struct ifnet *ifp, struct label *ifplabel,
1370 struct mbuf *m, struct label *mlabel)
1372 struct mac_lomac *source, *dest;
1374 source = SLOT(ifplabel);
1375 dest = SLOT(mlabel);
1377 mac_lomac_copy_single(source, dest);
1381 mac_lomac_mbuf_create_multicast_encap(struct mbuf *m, struct label *mlabel,
1382 struct ifnet *ifp, struct label *ifplabel, struct mbuf *mnew,
1383 struct label *mnewlabel)
1385 struct mac_lomac *source, *dest;
1387 source = SLOT(mlabel);
1388 dest = SLOT(mnewlabel);
1390 mac_lomac_copy_single(source, dest);
1394 mac_lomac_mbuf_create_netlayer(struct mbuf *m, struct label *mlabel,
1395 struct mbuf *mnew, struct label *mnewlabel)
1397 struct mac_lomac *source, *dest;
1399 source = SLOT(mlabel);
1400 dest = SLOT(mnewlabel);
1402 mac_lomac_copy_single(source, dest);
1406 mac_lomac_ipq_match(struct mbuf *m, struct label *mlabel, struct ipq *ipq,
1407 struct label *ipqlabel)
1409 struct mac_lomac *a, *b;
1414 return (mac_lomac_equal_single(a, b));
1418 mac_lomac_ifnet_relabel(struct ucred *cred, struct ifnet *ifp,
1419 struct label *ifplabel, struct label *newlabel)
1421 struct mac_lomac *source, *dest;
1423 source = SLOT(newlabel);
1424 dest = SLOT(ifplabel);
1426 try_relabel(source, dest);
1430 mac_lomac_ipq_update(struct mbuf *m, struct label *mlabel, struct ipq *ipq,
1431 struct label *ipqlabel)
1434 /* NOOP: we only accept matching labels, so no need to update */
1438 mac_lomac_inpcb_sosetlabel(struct socket *so, struct label *solabel,
1439 struct inpcb *inp, struct label *inplabel)
1441 struct mac_lomac *source, *dest;
1443 source = SLOT(solabel);
1444 dest = SLOT(inplabel);
1446 mac_lomac_copy_single(source, dest);
1450 mac_lomac_init_syncache_from_inpcb(struct label *label, struct inpcb *inp)
1452 struct mac_lomac *source, *dest;
1454 source = SLOT(inp->inp_label);
1456 mac_lomac_copy(source, dest);
1460 mac_lomac_create_mbuf_from_syncache(struct label *sc_label, struct mbuf *m,
1461 struct label *mlabel)
1463 struct mac_lomac *source, *dest;
1465 source = SLOT(sc_label);
1466 dest = SLOT(mlabel);
1467 mac_lomac_copy(source, dest);
1471 mac_lomac_mbuf_create_from_firewall(struct mbuf *m, struct label *mlabel)
1473 struct mac_lomac *dest;
1475 dest = SLOT(mlabel);
1477 /* XXX: where is the label for the firewall really comming from? */
1478 mac_lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0);
1482 * Labeling event operations: processes.
1485 mac_lomac_vnode_execve_transition(struct ucred *old, struct ucred *new,
1486 struct vnode *vp, struct label *vplabel, struct label *interpvplabel,
1487 struct image_params *imgp, struct label *execlabel)
1489 struct mac_lomac *source, *dest, *obj, *robj;
1491 source = SLOT(old->cr_label);
1492 dest = SLOT(new->cr_label);
1493 obj = SLOT(vplabel);
1494 robj = interpvplabel != NULL ? SLOT(interpvplabel) : obj;
1496 mac_lomac_copy(source, dest);
1498 * If there's an auxiliary label on the real object, respect it
1499 * and assume that this level should be assumed immediately if
1500 * a higher level is currently in place.
1502 if (robj->ml_flags & MAC_LOMAC_FLAG_AUX &&
1503 !mac_lomac_dominate_element(&robj->ml_auxsingle, &dest->ml_single)
1504 && mac_lomac_auxsingle_in_range(robj, dest))
1505 mac_lomac_set_single(dest, robj->ml_auxsingle.mle_type,
1506 robj->ml_auxsingle.mle_grade);
1508 * Restructuring to use the execve transitioning mechanism
1509 * instead of the normal demotion mechanism here would be
1510 * difficult, so just copy the label over and perform standard
1511 * demotion. This is also non-optimal because it will result
1512 * in the intermediate label "new" being created and immediately
1515 if (mac_lomac_enabled && revocation_enabled &&
1516 !mac_lomac_dominate_single(obj, source))
1517 (void)maybe_demote(source, obj, "executing", "file", vp);
1521 mac_lomac_vnode_execve_will_transition(struct ucred *old, struct vnode *vp,
1522 struct label *vplabel, struct label *interpvplabel,
1523 struct image_params *imgp, struct label *execlabel)
1525 struct mac_lomac *subj, *obj, *robj;
1527 if (!mac_lomac_enabled || !revocation_enabled)
1530 subj = SLOT(old->cr_label);
1531 obj = SLOT(vplabel);
1532 robj = interpvplabel != NULL ? SLOT(interpvplabel) : obj;
1534 return ((robj->ml_flags & MAC_LOMAC_FLAG_AUX &&
1535 !mac_lomac_dominate_element(&robj->ml_auxsingle, &subj->ml_single)
1536 && mac_lomac_auxsingle_in_range(robj, subj)) ||
1537 !mac_lomac_dominate_single(obj, subj));
1541 mac_lomac_proc_create_swapper(struct ucred *cred)
1543 struct mac_lomac *dest;
1545 dest = SLOT(cred->cr_label);
1547 mac_lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0);
1548 mac_lomac_set_range(dest, MAC_LOMAC_TYPE_LOW, 0, MAC_LOMAC_TYPE_HIGH,
1553 mac_lomac_proc_create_init(struct ucred *cred)
1555 struct mac_lomac *dest;
1557 dest = SLOT(cred->cr_label);
1559 mac_lomac_set_single(dest, MAC_LOMAC_TYPE_HIGH, 0);
1560 mac_lomac_set_range(dest, MAC_LOMAC_TYPE_LOW, 0, MAC_LOMAC_TYPE_HIGH,
1565 mac_lomac_cred_relabel(struct ucred *cred, struct label *newlabel)
1567 struct mac_lomac *source, *dest;
1569 source = SLOT(newlabel);
1570 dest = SLOT(cred->cr_label);
1572 try_relabel(source, dest);
1576 * Access control checks.
1579 mac_lomac_bpfdesc_check_receive(struct bpf_d *d, struct label *dlabel,
1580 struct ifnet *ifp, struct label *ifplabel)
1582 struct mac_lomac *a, *b;
1584 if (!mac_lomac_enabled)
1590 if (mac_lomac_equal_single(a, b))
1596 mac_lomac_cred_check_relabel(struct ucred *cred, struct label *newlabel)
1598 struct mac_lomac *subj, *new;
1601 subj = SLOT(cred->cr_label);
1602 new = SLOT(newlabel);
1605 * If there is a LOMAC label update for the credential, it may
1606 * be an update of the single, range, or both.
1608 error = lomac_atmostflags(new, MAC_LOMAC_FLAGS_BOTH);
1613 * If the LOMAC label is to be changed, authorize as appropriate.
1615 if (new->ml_flags & MAC_LOMAC_FLAGS_BOTH) {
1617 * Fill in the missing parts from the previous label.
1619 if ((new->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0)
1620 mac_lomac_copy_single(subj, new);
1621 if ((new->ml_flags & MAC_LOMAC_FLAG_RANGE) == 0)
1622 mac_lomac_copy_range(subj, new);
1625 * To change the LOMAC range on a credential, the new
1626 * range label must be in the current range.
1628 if (!mac_lomac_range_in_range(new, subj))
1632 * To change the LOMAC single label on a credential, the
1633 * new single label must be in the new range. Implicitly
1634 * from the previous check, the new single is in the old
1637 if (!mac_lomac_single_in_range(new, new))
1641 * To have EQUAL in any component of the new credential
1642 * LOMAC label, the subject must already have EQUAL in
1645 if (mac_lomac_contains_equal(new)) {
1646 error = mac_lomac_subject_privileged(subj);
1652 * XXXMAC: Additional consistency tests regarding the
1653 * single and range of the new label might be performed
1662 mac_lomac_cred_check_visible(struct ucred *cr1, struct ucred *cr2)
1664 struct mac_lomac *subj, *obj;
1666 if (!mac_lomac_enabled)
1669 subj = SLOT(cr1->cr_label);
1670 obj = SLOT(cr2->cr_label);
1673 if (!mac_lomac_dominate_single(obj, subj))
1680 mac_lomac_ifnet_check_relabel(struct ucred *cred, struct ifnet *ifp,
1681 struct label *ifplabel, struct label *newlabel)
1683 struct mac_lomac *subj, *new;
1686 subj = SLOT(cred->cr_label);
1687 new = SLOT(newlabel);
1690 * If there is a LOMAC label update for the interface, it may
1691 * be an update of the single, range, or both.
1693 error = lomac_atmostflags(new, MAC_LOMAC_FLAGS_BOTH);
1698 * Relabling network interfaces requires LOMAC privilege.
1700 error = mac_lomac_subject_privileged(subj);
1705 * If the LOMAC label is to be changed, authorize as appropriate.
1707 if (new->ml_flags & MAC_LOMAC_FLAGS_BOTH) {
1709 * Fill in the missing parts from the previous label.
1711 if ((new->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0)
1712 mac_lomac_copy_single(subj, new);
1713 if ((new->ml_flags & MAC_LOMAC_FLAG_RANGE) == 0)
1714 mac_lomac_copy_range(subj, new);
1717 * Rely on the traditional superuser status for the LOMAC
1718 * interface relabel requirements. XXXMAC: This will go
1721 * XXXRW: This is also redundant to a higher layer check.
1723 error = priv_check_cred(cred, PRIV_NET_SETIFMAC, 0);
1728 * XXXMAC: Additional consistency tests regarding the single
1729 * and the range of the new label might be performed here.
1737 mac_lomac_ifnet_check_transmit(struct ifnet *ifp, struct label *ifplabel,
1738 struct mbuf *m, struct label *mlabel)
1740 struct mac_lomac *p, *i;
1742 if (!mac_lomac_enabled)
1748 return (mac_lomac_single_in_range(p, i) ? 0 : EACCES);
1752 mac_lomac_inpcb_check_deliver(struct inpcb *inp, struct label *inplabel,
1753 struct mbuf *m, struct label *mlabel)
1755 struct mac_lomac *p, *i;
1757 if (!mac_lomac_enabled)
1763 return (mac_lomac_equal_single(p, i) ? 0 : EACCES);
1767 mac_lomac_kld_check_load(struct ucred *cred, struct vnode *vp,
1768 struct label *vplabel)
1770 struct mac_lomac *subj, *obj;
1772 if (!mac_lomac_enabled)
1775 subj = SLOT(cred->cr_label);
1776 obj = SLOT(vplabel);
1778 if (mac_lomac_subject_privileged(subj))
1781 if (!mac_lomac_high_single(obj))
1788 mac_lomac_pipe_check_ioctl(struct ucred *cred, struct pipepair *pp,
1789 struct label *pplabel, unsigned long cmd, void /* caddr_t */ *data)
1792 if (!mac_lomac_enabled)
1795 /* XXX: This will be implemented soon... */
1801 mac_lomac_pipe_check_read(struct ucred *cred, struct pipepair *pp,
1802 struct label *pplabel)
1804 struct mac_lomac *subj, *obj;
1806 if (!mac_lomac_enabled)
1809 subj = SLOT(cred->cr_label);
1810 obj = SLOT(pplabel);
1812 if (!mac_lomac_dominate_single(obj, subj))
1813 return (maybe_demote(subj, obj, "reading", "pipe", NULL));
1819 mac_lomac_pipe_check_relabel(struct ucred *cred, struct pipepair *pp,
1820 struct label *pplabel, struct label *newlabel)
1822 struct mac_lomac *subj, *obj, *new;
1825 new = SLOT(newlabel);
1826 subj = SLOT(cred->cr_label);
1827 obj = SLOT(pplabel);
1830 * If there is a LOMAC label update for a pipe, it must be a
1833 error = lomac_atmostflags(new, MAC_LOMAC_FLAG_SINGLE);
1838 * To perform a relabel of a pipe (LOMAC label or not), LOMAC must
1839 * authorize the relabel.
1841 if (!mac_lomac_single_in_range(obj, subj))
1845 * If the LOMAC label is to be changed, authorize as appropriate.
1847 if (new->ml_flags & MAC_LOMAC_FLAG_SINGLE) {
1849 * To change the LOMAC label on a pipe, the new pipe label
1850 * must be in the subject range.
1852 if (!mac_lomac_single_in_range(new, subj))
1856 * To change the LOMAC label on a pipe to be EQUAL, the
1857 * subject must have appropriate privilege.
1859 if (mac_lomac_contains_equal(new)) {
1860 error = mac_lomac_subject_privileged(subj);
1870 mac_lomac_pipe_check_write(struct ucred *cred, struct pipepair *pp,
1871 struct label *pplabel)
1873 struct mac_lomac *subj, *obj;
1875 if (!mac_lomac_enabled)
1878 subj = SLOT(cred->cr_label);
1879 obj = SLOT(pplabel);
1881 if (!mac_lomac_subject_dominate(subj, obj))
1888 mac_lomac_proc_check_debug(struct ucred *cred, struct proc *p)
1890 struct mac_lomac *subj, *obj;
1892 if (!mac_lomac_enabled)
1895 subj = SLOT(cred->cr_label);
1896 obj = SLOT(p->p_ucred->cr_label);
1898 /* XXX: range checks */
1899 if (!mac_lomac_dominate_single(obj, subj))
1901 if (!mac_lomac_subject_dominate(subj, obj))
1908 mac_lomac_proc_check_sched(struct ucred *cred, struct proc *p)
1910 struct mac_lomac *subj, *obj;
1912 if (!mac_lomac_enabled)
1915 subj = SLOT(cred->cr_label);
1916 obj = SLOT(p->p_ucred->cr_label);
1918 /* XXX: range checks */
1919 if (!mac_lomac_dominate_single(obj, subj))
1921 if (!mac_lomac_subject_dominate(subj, obj))
1928 mac_lomac_proc_check_signal(struct ucred *cred, struct proc *p, int signum)
1930 struct mac_lomac *subj, *obj;
1932 if (!mac_lomac_enabled)
1935 subj = SLOT(cred->cr_label);
1936 obj = SLOT(p->p_ucred->cr_label);
1938 /* XXX: range checks */
1939 if (!mac_lomac_dominate_single(obj, subj))
1941 if (!mac_lomac_subject_dominate(subj, obj))
1948 mac_lomac_socket_check_deliver(struct socket *so, struct label *solabel,
1949 struct mbuf *m, struct label *mlabel)
1951 struct mac_lomac *p, *s;
1953 if (!mac_lomac_enabled)
1959 return (mac_lomac_equal_single(p, s) ? 0 : EACCES);
1963 mac_lomac_socket_check_relabel(struct ucred *cred, struct socket *so,
1964 struct label *solabel, struct label *newlabel)
1966 struct mac_lomac *subj, *obj, *new;
1969 new = SLOT(newlabel);
1970 subj = SLOT(cred->cr_label);
1971 obj = SLOT(solabel);
1974 * If there is a LOMAC label update for the socket, it may be
1975 * an update of single.
1977 error = lomac_atmostflags(new, MAC_LOMAC_FLAG_SINGLE);
1982 * To relabel a socket, the old socket single must be in the subject
1985 if (!mac_lomac_single_in_range(obj, subj))
1989 * If the LOMAC label is to be changed, authorize as appropriate.
1991 if (new->ml_flags & MAC_LOMAC_FLAG_SINGLE) {
1993 * To relabel a socket, the new socket single must be in
1994 * the subject range.
1996 if (!mac_lomac_single_in_range(new, subj))
2000 * To change the LOMAC label on the socket to contain EQUAL,
2001 * the subject must have appropriate privilege.
2003 if (mac_lomac_contains_equal(new)) {
2004 error = mac_lomac_subject_privileged(subj);
2014 mac_lomac_socket_check_visible(struct ucred *cred, struct socket *so,
2015 struct label *solabel)
2017 struct mac_lomac *subj, *obj;
2019 if (!mac_lomac_enabled)
2022 subj = SLOT(cred->cr_label);
2023 obj = SLOT(solabel);
2025 if (!mac_lomac_dominate_single(obj, subj))
2032 * Some system privileges are allowed regardless of integrity grade; others
2033 * are allowed only when running with privilege with respect to the LOMAC
2034 * policy as they might otherwise allow bypassing of the integrity policy.
2037 mac_lomac_priv_check(struct ucred *cred, int priv)
2039 struct mac_lomac *subj;
2042 if (!mac_lomac_enabled)
2046 * Exempt only specific privileges from the LOMAC integrity policy.
2053 * Allow processes to manipulate basic process audit properties, and
2054 * to submit audit records.
2056 case PRIV_AUDIT_GETAUDIT:
2057 case PRIV_AUDIT_SETAUDIT:
2058 case PRIV_AUDIT_SUBMIT:
2061 * Allow processes to manipulate their regular UNIX credentials.
2063 case PRIV_CRED_SETUID:
2064 case PRIV_CRED_SETEUID:
2065 case PRIV_CRED_SETGID:
2066 case PRIV_CRED_SETEGID:
2067 case PRIV_CRED_SETGROUPS:
2068 case PRIV_CRED_SETREUID:
2069 case PRIV_CRED_SETREGID:
2070 case PRIV_CRED_SETRESUID:
2071 case PRIV_CRED_SETRESGID:
2074 * Allow processes to perform system monitoring.
2076 case PRIV_SEEOTHERGIDS:
2077 case PRIV_SEEOTHERUIDS:
2081 * Allow access to general process debugging facilities. We
2082 * separately control debugging based on MAC label.
2084 case PRIV_DEBUG_DIFFCRED:
2085 case PRIV_DEBUG_SUGID:
2086 case PRIV_DEBUG_UNPRIV:
2089 * Allow manipulating jails.
2091 case PRIV_JAIL_ATTACH:
2094 * Allow privilege with respect to the Partition policy, but not the
2097 case PRIV_MAC_PARTITION:
2100 * Allow privilege with respect to process resource limits and login
2103 case PRIV_PROC_LIMIT:
2104 case PRIV_PROC_SETLOGIN:
2105 case PRIV_PROC_SETRLIMIT:
2108 * Allow System V and POSIX IPC privileges.
2111 case PRIV_IPC_WRITE:
2112 case PRIV_IPC_ADMIN:
2113 case PRIV_IPC_MSGSIZE:
2117 * Allow certain scheduler manipulations -- possibly this should be
2118 * controlled by more fine-grained policy, as potentially low
2119 * integrity processes can deny CPU to higher integrity ones.
2121 case PRIV_SCHED_DIFFCRED:
2122 case PRIV_SCHED_SETPRIORITY:
2123 case PRIV_SCHED_RTPRIO:
2124 case PRIV_SCHED_SETPOLICY:
2125 case PRIV_SCHED_SET:
2126 case PRIV_SCHED_SETPARAM:
2129 * More IPC privileges.
2131 case PRIV_SEM_WRITE:
2134 * Allow signaling privileges subject to integrity policy.
2136 case PRIV_SIGNAL_DIFFCRED:
2137 case PRIV_SIGNAL_SUGID:
2140 * Allow access to only limited sysctls from lower integrity levels;
2141 * piggy-back on the Jail definition.
2143 case PRIV_SYSCTL_WRITEJAIL:
2146 * Allow TTY-based privileges, subject to general device access using
2147 * labels on TTY device nodes, but not console privilege.
2149 case PRIV_TTY_DRAINWAIT:
2150 case PRIV_TTY_DTRWAIT:
2151 case PRIV_TTY_EXCLUSIVE:
2152 case PRIV_TTY_PRISON:
2157 * Grant most VFS privileges, as almost all are in practice bounded
2158 * by more specific checks using labels.
2161 case PRIV_VFS_WRITE:
2162 case PRIV_VFS_ADMIN:
2164 case PRIV_VFS_LOOKUP:
2165 case PRIV_VFS_CHFLAGS_DEV:
2166 case PRIV_VFS_CHOWN:
2167 case PRIV_VFS_CHROOT:
2168 case PRIV_VFS_RETAINSUGID:
2169 case PRIV_VFS_EXCEEDQUOTA:
2170 case PRIV_VFS_FCHROOT:
2171 case PRIV_VFS_FHOPEN:
2172 case PRIV_VFS_FHSTATFS:
2173 case PRIV_VFS_GENERATION:
2174 case PRIV_VFS_GETFH:
2175 case PRIV_VFS_GETQUOTA:
2177 case PRIV_VFS_MOUNT:
2178 case PRIV_VFS_MOUNT_OWNER:
2179 case PRIV_VFS_MOUNT_PERM:
2180 case PRIV_VFS_MOUNT_SUIDDIR:
2181 case PRIV_VFS_MOUNT_NONUSER:
2182 case PRIV_VFS_SETGID:
2183 case PRIV_VFS_STICKYFILE:
2184 case PRIV_VFS_SYSFLAGS:
2185 case PRIV_VFS_UNMOUNT:
2188 * Allow VM privileges; it would be nice if these were subject to
2191 case PRIV_VM_MADV_PROTECT:
2193 case PRIV_VM_MUNLOCK:
2196 * Allow some but not all network privileges. In general, dont allow
2197 * reconfiguring the network stack, just normal use.
2199 case PRIV_NETATALK_RESERVEDPORT:
2200 case PRIV_NETINET_RESERVEDPORT:
2201 case PRIV_NETINET_RAW:
2202 case PRIV_NETINET_REUSEPORT:
2203 case PRIV_NETIPX_RESERVEDPORT:
2204 case PRIV_NETIPX_RAW:
2208 * All remaining system privileges are allow only if the process
2209 * holds privilege with respect to the LOMAC policy.
2212 subj = SLOT(cred->cr_label);
2213 error = mac_lomac_subject_privileged(subj);
2222 mac_lomac_system_check_acct(struct ucred *cred, struct vnode *vp,
2223 struct label *vplabel)
2225 struct mac_lomac *subj, *obj;
2227 if (!mac_lomac_enabled)
2230 subj = SLOT(cred->cr_label);
2231 obj = SLOT(vplabel);
2233 if (mac_lomac_subject_privileged(subj))
2236 if (!mac_lomac_high_single(obj))
2243 mac_lomac_system_check_auditctl(struct ucred *cred, struct vnode *vp,
2244 struct label *vplabel)
2246 struct mac_lomac *subj, *obj;
2248 if (!mac_lomac_enabled)
2251 subj = SLOT(cred->cr_label);
2252 obj = SLOT(vplabel);
2254 if (mac_lomac_subject_privileged(subj))
2257 if (!mac_lomac_high_single(obj))
2264 mac_lomac_system_check_swapoff(struct ucred *cred, struct vnode *vp,
2265 struct label *vplabel)
2267 struct mac_lomac *subj;
2269 if (!mac_lomac_enabled)
2272 subj = SLOT(cred->cr_label);
2274 if (mac_lomac_subject_privileged(subj))
2281 mac_lomac_system_check_swapon(struct ucred *cred, struct vnode *vp,
2282 struct label *vplabel)
2284 struct mac_lomac *subj, *obj;
2286 if (!mac_lomac_enabled)
2289 subj = SLOT(cred->cr_label);
2290 obj = SLOT(vplabel);
2292 if (mac_lomac_subject_privileged(subj))
2295 if (!mac_lomac_high_single(obj))
2302 mac_lomac_system_check_sysctl(struct ucred *cred, struct sysctl_oid *oidp,
2303 void *arg1, int arg2, struct sysctl_req *req)
2305 struct mac_lomac *subj;
2307 if (!mac_lomac_enabled)
2310 subj = SLOT(cred->cr_label);
2313 * Treat sysctl variables without CTLFLAG_ANYBODY flag as
2314 * lomac/high, but also require privilege to change them.
2316 if (req->newptr != NULL && (oidp->oid_kind & CTLFLAG_ANYBODY) == 0) {
2318 if (!mac_lomac_subject_dominate_high(subj))
2322 if (mac_lomac_subject_privileged(subj))
2330 mac_lomac_vnode_check_create(struct ucred *cred, struct vnode *dvp,
2331 struct label *dvplabel, struct componentname *cnp, struct vattr *vap)
2333 struct mac_lomac *subj, *obj;
2335 if (!mac_lomac_enabled)
2338 subj = SLOT(cred->cr_label);
2339 obj = SLOT(dvplabel);
2341 if (!mac_lomac_subject_dominate(subj, obj))
2343 if (obj->ml_flags & MAC_LOMAC_FLAG_AUX &&
2344 !mac_lomac_dominate_element(&subj->ml_single, &obj->ml_auxsingle))
2351 mac_lomac_vnode_check_deleteacl(struct ucred *cred, struct vnode *vp,
2352 struct label *vplabel, acl_type_t type)
2354 struct mac_lomac *subj, *obj;
2356 if (!mac_lomac_enabled)
2359 subj = SLOT(cred->cr_label);
2360 obj = SLOT(vplabel);
2362 if (!mac_lomac_subject_dominate(subj, obj))
2369 mac_lomac_vnode_check_link(struct ucred *cred, struct vnode *dvp,
2370 struct label *dvplabel, struct vnode *vp, struct label *vplabel,
2371 struct componentname *cnp)
2373 struct mac_lomac *subj, *obj;
2375 if (!mac_lomac_enabled)
2378 subj = SLOT(cred->cr_label);
2379 obj = SLOT(dvplabel);
2381 if (!mac_lomac_subject_dominate(subj, obj))
2384 obj = SLOT(vplabel);
2386 if (!mac_lomac_subject_dominate(subj, obj))
2393 mac_lomac_vnode_check_mmap(struct ucred *cred, struct vnode *vp,
2394 struct label *vplabel, int prot, int flags)
2396 struct mac_lomac *subj, *obj;
2399 * Rely on the use of open()-time protections to handle
2400 * non-revocation cases.
2402 if (!mac_lomac_enabled)
2405 subj = SLOT(cred->cr_label);
2406 obj = SLOT(vplabel);
2408 if (((prot & VM_PROT_WRITE) != 0) && ((flags & MAP_SHARED) != 0)) {
2409 if (!mac_lomac_subject_dominate(subj, obj))
2412 if (prot & (VM_PROT_READ | VM_PROT_EXECUTE)) {
2413 if (!mac_lomac_dominate_single(obj, subj))
2414 return (maybe_demote(subj, obj, "mapping", "file", vp));
2421 mac_lomac_vnode_check_mmap_downgrade(struct ucred *cred, struct vnode *vp,
2422 struct label *vplabel, /* XXX vm_prot_t */ int *prot)
2424 struct mac_lomac *subj, *obj;
2427 * Rely on the use of open()-time protections to handle
2428 * non-revocation cases.
2430 if (!mac_lomac_enabled || !revocation_enabled)
2433 subj = SLOT(cred->cr_label);
2434 obj = SLOT(vplabel);
2436 if (!mac_lomac_subject_dominate(subj, obj))
2437 *prot &= ~VM_PROT_WRITE;
2441 mac_lomac_vnode_check_open(struct ucred *cred, struct vnode *vp,
2442 struct label *vplabel, int acc_mode)
2444 struct mac_lomac *subj, *obj;
2446 if (!mac_lomac_enabled)
2449 subj = SLOT(cred->cr_label);
2450 obj = SLOT(vplabel);
2452 /* XXX privilege override for admin? */
2453 if (acc_mode & (VWRITE | VAPPEND | VADMIN)) {
2454 if (!mac_lomac_subject_dominate(subj, obj))
2462 mac_lomac_vnode_check_read(struct ucred *active_cred, struct ucred *file_cred,
2463 struct vnode *vp, struct label *vplabel)
2465 struct mac_lomac *subj, *obj;
2467 if (!mac_lomac_enabled || !revocation_enabled)
2470 subj = SLOT(active_cred->cr_label);
2471 obj = SLOT(vplabel);
2473 if (!mac_lomac_dominate_single(obj, subj))
2474 return (maybe_demote(subj, obj, "reading", "file", vp));
2480 mac_lomac_vnode_check_relabel(struct ucred *cred, struct vnode *vp,
2481 struct label *vplabel, struct label *newlabel)
2483 struct mac_lomac *old, *new, *subj;
2486 old = SLOT(vplabel);
2487 new = SLOT(newlabel);
2488 subj = SLOT(cred->cr_label);
2491 * If there is a LOMAC label update for the vnode, it must be a
2492 * single label, with an optional explicit auxiliary single.
2494 error = lomac_atmostflags(new,
2495 MAC_LOMAC_FLAG_SINGLE | MAC_LOMAC_FLAG_AUX);
2500 * To perform a relabel of the vnode (LOMAC label or not), LOMAC must
2501 * authorize the relabel.
2503 if (!mac_lomac_single_in_range(old, subj))
2507 * If the LOMAC label is to be changed, authorize as appropriate.
2509 if (new->ml_flags & MAC_LOMAC_FLAG_SINGLE) {
2511 * To change the LOMAC label on a vnode, the new vnode label
2512 * must be in the subject range.
2514 if (!mac_lomac_single_in_range(new, subj))
2518 * To change the LOMAC label on the vnode to be EQUAL,
2519 * the subject must have appropriate privilege.
2521 if (mac_lomac_contains_equal(new)) {
2522 error = mac_lomac_subject_privileged(subj);
2527 if (new->ml_flags & MAC_LOMAC_FLAG_AUX) {
2529 * Fill in the missing parts from the previous label.
2531 if ((new->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0)
2532 mac_lomac_copy_single(subj, new);
2535 * To change the auxiliary LOMAC label on a vnode, the new
2536 * vnode label must be in the subject range.
2538 if (!mac_lomac_auxsingle_in_range(new, subj))
2542 * To change the auxiliary LOMAC label on the vnode to be
2543 * EQUAL, the subject must have appropriate privilege.
2545 if (mac_lomac_contains_equal(new)) {
2546 error = mac_lomac_subject_privileged(subj);
2556 mac_lomac_vnode_check_rename_from(struct ucred *cred, struct vnode *dvp,
2557 struct label *dvplabel, struct vnode *vp, struct label *vplabel,
2558 struct componentname *cnp)
2560 struct mac_lomac *subj, *obj;
2562 if (!mac_lomac_enabled)
2565 subj = SLOT(cred->cr_label);
2566 obj = SLOT(dvplabel);
2568 if (!mac_lomac_subject_dominate(subj, obj))
2571 obj = SLOT(vplabel);
2573 if (!mac_lomac_subject_dominate(subj, obj))
2580 mac_lomac_vnode_check_rename_to(struct ucred *cred, struct vnode *dvp,
2581 struct label *dvplabel, struct vnode *vp, struct label *vplabel,
2582 int samedir, struct componentname *cnp)
2584 struct mac_lomac *subj, *obj;
2586 if (!mac_lomac_enabled)
2589 subj = SLOT(cred->cr_label);
2590 obj = SLOT(dvplabel);
2592 if (!mac_lomac_subject_dominate(subj, obj))
2596 obj = SLOT(vplabel);
2598 if (!mac_lomac_subject_dominate(subj, obj))
2606 mac_lomac_vnode_check_revoke(struct ucred *cred, struct vnode *vp,
2607 struct label *vplabel)
2609 struct mac_lomac *subj, *obj;
2611 if (!mac_lomac_enabled)
2614 subj = SLOT(cred->cr_label);
2615 obj = SLOT(vplabel);
2617 if (!mac_lomac_subject_dominate(subj, obj))
2624 mac_lomac_vnode_check_setacl(struct ucred *cred, struct vnode *vp,
2625 struct label *vplabel, acl_type_t type, struct acl *acl)
2627 struct mac_lomac *subj, *obj;
2629 if (!mac_lomac_enabled)
2632 subj = SLOT(cred->cr_label);
2633 obj = SLOT(vplabel);
2635 if (!mac_lomac_subject_dominate(subj, obj))
2642 mac_lomac_vnode_check_setextattr(struct ucred *cred, struct vnode *vp,
2643 struct label *vplabel, int attrnamespace, const char *name,
2646 struct mac_lomac *subj, *obj;
2648 if (!mac_lomac_enabled)
2651 subj = SLOT(cred->cr_label);
2652 obj = SLOT(vplabel);
2654 if (!mac_lomac_subject_dominate(subj, obj))
2657 /* XXX: protect the MAC EA in a special way? */
2663 mac_lomac_vnode_check_setflags(struct ucred *cred, struct vnode *vp,
2664 struct label *vplabel, u_long flags)
2666 struct mac_lomac *subj, *obj;
2668 if (!mac_lomac_enabled)
2671 subj = SLOT(cred->cr_label);
2672 obj = SLOT(vplabel);
2674 if (!mac_lomac_subject_dominate(subj, obj))
2681 mac_lomac_vnode_check_setmode(struct ucred *cred, struct vnode *vp,
2682 struct label *vplabel, mode_t mode)
2684 struct mac_lomac *subj, *obj;
2686 if (!mac_lomac_enabled)
2689 subj = SLOT(cred->cr_label);
2690 obj = SLOT(vplabel);
2692 if (!mac_lomac_subject_dominate(subj, obj))
2699 mac_lomac_vnode_check_setowner(struct ucred *cred, struct vnode *vp,
2700 struct label *vplabel, uid_t uid, gid_t gid)
2702 struct mac_lomac *subj, *obj;
2704 if (!mac_lomac_enabled)
2707 subj = SLOT(cred->cr_label);
2708 obj = SLOT(vplabel);
2710 if (!mac_lomac_subject_dominate(subj, obj))
2717 mac_lomac_vnode_check_setutimes(struct ucred *cred, struct vnode *vp,
2718 struct label *vplabel, struct timespec atime, struct timespec mtime)
2720 struct mac_lomac *subj, *obj;
2722 if (!mac_lomac_enabled)
2725 subj = SLOT(cred->cr_label);
2726 obj = SLOT(vplabel);
2728 if (!mac_lomac_subject_dominate(subj, obj))
2735 mac_lomac_vnode_check_unlink(struct ucred *cred, struct vnode *dvp,
2736 struct label *dvplabel, struct vnode *vp, struct label *vplabel,
2737 struct componentname *cnp)
2739 struct mac_lomac *subj, *obj;
2741 if (!mac_lomac_enabled)
2744 subj = SLOT(cred->cr_label);
2745 obj = SLOT(dvplabel);
2747 if (!mac_lomac_subject_dominate(subj, obj))
2750 obj = SLOT(vplabel);
2752 if (!mac_lomac_subject_dominate(subj, obj))
2759 mac_lomac_vnode_check_write(struct ucred *active_cred,
2760 struct ucred *file_cred, struct vnode *vp, struct label *vplabel)
2762 struct mac_lomac *subj, *obj;
2764 if (!mac_lomac_enabled || !revocation_enabled)
2767 subj = SLOT(active_cred->cr_label);
2768 obj = SLOT(vplabel);
2770 if (!mac_lomac_subject_dominate(subj, obj))
2777 mac_lomac_thread_userret(struct thread *td)
2779 struct proc *p = td->td_proc;
2780 struct mac_lomac_proc *subj = PSLOT(p->p_label);
2781 struct ucred *newcred, *oldcred;
2784 mtx_lock(&subj->mtx);
2785 if (subj->mac_lomac.ml_flags & MAC_LOMAC_FLAG_UPDATE) {
2787 mtx_unlock(&subj->mtx);
2790 * Prevent a lock order reversal in
2791 * mac_cred_mmapped_drop_perms; ideally, the other
2792 * user of subj->mtx wouldn't be holding Giant.
2796 mtx_lock(&subj->mtx);
2798 * Check if we lost the race while allocating the cred.
2800 if ((subj->mac_lomac.ml_flags & MAC_LOMAC_FLAG_UPDATE) == 0) {
2804 oldcred = p->p_ucred;
2805 crcopy(newcred, oldcred);
2807 mac_lomac_copy(&subj->mac_lomac, SLOT(newcred->cr_label));
2808 p->p_ucred = newcred;
2812 mtx_unlock(&subj->mtx);
2815 mac_cred_mmapped_drop_perms(curthread, newcred);
2818 mtx_unlock(&subj->mtx);
2822 static struct mac_policy_ops mac_lomac_ops =
2824 .mpo_init = mac_lomac_init,
2825 .mpo_bpfdesc_init_label = mac_lomac_init_label,
2826 .mpo_cred_init_label = mac_lomac_init_label,
2827 .mpo_devfs_init_label = mac_lomac_init_label,
2828 .mpo_ifnet_init_label = mac_lomac_init_label,
2829 .mpo_init_syncache_label = mac_lomac_init_label_waitcheck,
2830 .mpo_inpcb_init_label = mac_lomac_init_label_waitcheck,
2831 .mpo_ipq_init_label = mac_lomac_init_label_waitcheck,
2832 .mpo_mbuf_init_label = mac_lomac_init_label_waitcheck,
2833 .mpo_mount_init_label = mac_lomac_init_label,
2834 .mpo_pipe_init_label = mac_lomac_init_label,
2835 .mpo_proc_init_label = mac_lomac_proc_init_label,
2836 .mpo_socket_init_label = mac_lomac_init_label_waitcheck,
2837 .mpo_socketpeer_init_label = mac_lomac_init_label_waitcheck,
2838 .mpo_vnode_init_label = mac_lomac_init_label,
2839 .mpo_init_syncache_from_inpcb = mac_lomac_init_syncache_from_inpcb,
2840 .mpo_bpfdesc_destroy_label = mac_lomac_destroy_label,
2841 .mpo_cred_destroy_label = mac_lomac_destroy_label,
2842 .mpo_devfs_destroy_label = mac_lomac_destroy_label,
2843 .mpo_ifnet_destroy_label = mac_lomac_destroy_label,
2844 .mpo_inpcb_destroy_label = mac_lomac_destroy_label,
2845 .mpo_ipq_destroy_label = mac_lomac_destroy_label,
2846 .mpo_mbuf_destroy_label = mac_lomac_destroy_label,
2847 .mpo_mount_destroy_label = mac_lomac_destroy_label,
2848 .mpo_pipe_destroy_label = mac_lomac_destroy_label,
2849 .mpo_proc_destroy_label = mac_lomac_proc_destroy_label,
2850 .mpo_destroy_syncache_label = mac_lomac_destroy_label,
2851 .mpo_socket_destroy_label = mac_lomac_destroy_label,
2852 .mpo_socketpeer_destroy_label = mac_lomac_destroy_label,
2853 .mpo_vnode_destroy_label = mac_lomac_destroy_label,
2854 .mpo_cred_copy_label = mac_lomac_copy_label,
2855 .mpo_ifnet_copy_label = mac_lomac_copy_label,
2856 .mpo_mbuf_copy_label = mac_lomac_copy_label,
2857 .mpo_pipe_copy_label = mac_lomac_copy_label,
2858 .mpo_socket_copy_label = mac_lomac_copy_label,
2859 .mpo_vnode_copy_label = mac_lomac_copy_label,
2860 .mpo_cred_externalize_label = mac_lomac_externalize_label,
2861 .mpo_ifnet_externalize_label = mac_lomac_externalize_label,
2862 .mpo_pipe_externalize_label = mac_lomac_externalize_label,
2863 .mpo_socket_externalize_label = mac_lomac_externalize_label,
2864 .mpo_socketpeer_externalize_label = mac_lomac_externalize_label,
2865 .mpo_vnode_externalize_label = mac_lomac_externalize_label,
2866 .mpo_cred_internalize_label = mac_lomac_internalize_label,
2867 .mpo_ifnet_internalize_label = mac_lomac_internalize_label,
2868 .mpo_pipe_internalize_label = mac_lomac_internalize_label,
2869 .mpo_socket_internalize_label = mac_lomac_internalize_label,
2870 .mpo_vnode_internalize_label = mac_lomac_internalize_label,
2871 .mpo_devfs_create_device = mac_lomac_devfs_create_device,
2872 .mpo_devfs_create_directory = mac_lomac_devfs_create_directory,
2873 .mpo_devfs_create_symlink = mac_lomac_devfs_create_symlink,
2874 .mpo_mount_create = mac_lomac_mount_create,
2875 .mpo_vnode_relabel = mac_lomac_vnode_relabel,
2876 .mpo_devfs_update = mac_lomac_devfs_update,
2877 .mpo_devfs_vnode_associate = mac_lomac_devfs_vnode_associate,
2878 .mpo_vnode_associate_extattr = mac_lomac_vnode_associate_extattr,
2879 .mpo_vnode_associate_singlelabel =
2880 mac_lomac_vnode_associate_singlelabel,
2881 .mpo_vnode_create_extattr = mac_lomac_vnode_create_extattr,
2882 .mpo_vnode_setlabel_extattr = mac_lomac_vnode_setlabel_extattr,
2883 .mpo_socket_create_mbuf = mac_lomac_socket_create_mbuf,
2884 .mpo_create_mbuf_from_syncache = mac_lomac_create_mbuf_from_syncache,
2885 .mpo_pipe_create = mac_lomac_pipe_create,
2886 .mpo_socket_create = mac_lomac_socket_create,
2887 .mpo_socket_newconn = mac_lomac_socket_newconn,
2888 .mpo_pipe_relabel = mac_lomac_pipe_relabel,
2889 .mpo_socket_relabel = mac_lomac_socket_relabel,
2890 .mpo_socketpeer_set_from_mbuf = mac_lomac_socketpeer_set_from_mbuf,
2891 .mpo_socketpeer_set_from_socket =
2892 mac_lomac_socketpeer_set_from_socket,
2893 .mpo_bpfdesc_create = mac_lomac_bpfdesc_create,
2894 .mpo_ipq_reassemble = mac_lomac_ipq_reassemble,
2895 .mpo_netinet_fragment = mac_lomac_netinet_fragment,
2896 .mpo_ifnet_create = mac_lomac_ifnet_create,
2897 .mpo_inpcb_create = mac_lomac_inpcb_create,
2898 .mpo_ipq_create = mac_lomac_ipq_create,
2899 .mpo_inpcb_create_mbuf = mac_lomac_inpcb_create_mbuf,
2900 .mpo_create_mbuf_linklayer = mac_lomac_create_mbuf_linklayer,
2901 .mpo_bpfdesc_create_mbuf = mac_lomac_bpfdesc_create_mbuf,
2902 .mpo_ifnet_create_mbuf = mac_lomac_ifnet_create_mbuf,
2903 .mpo_mbuf_create_multicast_encap =
2904 mac_lomac_mbuf_create_multicast_encap,
2905 .mpo_mbuf_create_netlayer = mac_lomac_mbuf_create_netlayer,
2906 .mpo_ipq_match = mac_lomac_ipq_match,
2907 .mpo_ifnet_relabel = mac_lomac_ifnet_relabel,
2908 .mpo_ipq_update = mac_lomac_ipq_update,
2909 .mpo_inpcb_sosetlabel = mac_lomac_inpcb_sosetlabel,
2910 .mpo_vnode_execve_transition = mac_lomac_vnode_execve_transition,
2911 .mpo_vnode_execve_will_transition =
2912 mac_lomac_vnode_execve_will_transition,
2913 .mpo_proc_create_swapper = mac_lomac_proc_create_swapper,
2914 .mpo_proc_create_init = mac_lomac_proc_create_init,
2915 .mpo_cred_relabel = mac_lomac_cred_relabel,
2916 .mpo_bpfdesc_check_receive = mac_lomac_bpfdesc_check_receive,
2917 .mpo_cred_check_relabel = mac_lomac_cred_check_relabel,
2918 .mpo_cred_check_visible = mac_lomac_cred_check_visible,
2919 .mpo_ifnet_check_relabel = mac_lomac_ifnet_check_relabel,
2920 .mpo_ifnet_check_transmit = mac_lomac_ifnet_check_transmit,
2921 .mpo_inpcb_check_deliver = mac_lomac_inpcb_check_deliver,
2922 .mpo_kld_check_load = mac_lomac_kld_check_load,
2923 .mpo_pipe_check_ioctl = mac_lomac_pipe_check_ioctl,
2924 .mpo_pipe_check_read = mac_lomac_pipe_check_read,
2925 .mpo_pipe_check_relabel = mac_lomac_pipe_check_relabel,
2926 .mpo_pipe_check_write = mac_lomac_pipe_check_write,
2927 .mpo_proc_check_debug = mac_lomac_proc_check_debug,
2928 .mpo_proc_check_sched = mac_lomac_proc_check_sched,
2929 .mpo_proc_check_signal = mac_lomac_proc_check_signal,
2930 .mpo_socket_check_deliver = mac_lomac_socket_check_deliver,
2931 .mpo_socket_check_relabel = mac_lomac_socket_check_relabel,
2932 .mpo_socket_check_visible = mac_lomac_socket_check_visible,
2933 .mpo_system_check_acct = mac_lomac_system_check_acct,
2934 .mpo_system_check_auditctl = mac_lomac_system_check_auditctl,
2935 .mpo_system_check_swapoff = mac_lomac_system_check_swapoff,
2936 .mpo_system_check_swapon = mac_lomac_system_check_swapon,
2937 .mpo_system_check_sysctl = mac_lomac_system_check_sysctl,
2938 .mpo_vnode_check_access = mac_lomac_vnode_check_open,
2939 .mpo_vnode_check_create = mac_lomac_vnode_check_create,
2940 .mpo_vnode_check_deleteacl = mac_lomac_vnode_check_deleteacl,
2941 .mpo_vnode_check_link = mac_lomac_vnode_check_link,
2942 .mpo_vnode_check_mmap = mac_lomac_vnode_check_mmap,
2943 .mpo_vnode_check_mmap_downgrade = mac_lomac_vnode_check_mmap_downgrade,
2944 .mpo_vnode_check_open = mac_lomac_vnode_check_open,
2945 .mpo_vnode_check_read = mac_lomac_vnode_check_read,
2946 .mpo_vnode_check_relabel = mac_lomac_vnode_check_relabel,
2947 .mpo_vnode_check_rename_from = mac_lomac_vnode_check_rename_from,
2948 .mpo_vnode_check_rename_to = mac_lomac_vnode_check_rename_to,
2949 .mpo_vnode_check_revoke = mac_lomac_vnode_check_revoke,
2950 .mpo_vnode_check_setacl = mac_lomac_vnode_check_setacl,
2951 .mpo_vnode_check_setextattr = mac_lomac_vnode_check_setextattr,
2952 .mpo_vnode_check_setflags = mac_lomac_vnode_check_setflags,
2953 .mpo_vnode_check_setmode = mac_lomac_vnode_check_setmode,
2954 .mpo_vnode_check_setowner = mac_lomac_vnode_check_setowner,
2955 .mpo_vnode_check_setutimes = mac_lomac_vnode_check_setutimes,
2956 .mpo_vnode_check_unlink = mac_lomac_vnode_check_unlink,
2957 .mpo_vnode_check_write = mac_lomac_vnode_check_write,
2958 .mpo_thread_userret = mac_lomac_thread_userret,
2959 .mpo_mbuf_create_from_firewall = mac_lomac_mbuf_create_from_firewall,
2960 .mpo_priv_check = mac_lomac_priv_check,
2963 MAC_POLICY_SET(&mac_lomac_ops, mac_lomac, "TrustedBSD MAC/LOMAC",
2964 MPC_LOADTIME_FLAG_NOTLATE | MPC_LOADTIME_FLAG_LABELMBUFS,