2 * Copyright (c) 1999-2002, 2007 Robert N. M. Watson
3 * Copyright (c) 2001-2005 Networks Associates Technology, Inc.
6 * This software was developed by Robert Watson for the TrustedBSD Project.
8 * This software was developed for the FreeBSD Project in part by NAI Labs,
9 * the Security Research Division of Network Associates, Inc. under
10 * DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA
11 * CHATS research program.
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * Developed by the TrustedBSD Project.
40 * Low-watermark floating label mandatory integrity policy.
43 #include <sys/types.h>
44 #include <sys/param.h>
47 #include <sys/extattr.h>
48 #include <sys/kernel.h>
49 #include <sys/malloc.h>
51 #include <sys/mount.h>
55 #include <sys/systm.h>
56 #include <sys/sysproto.h>
57 #include <sys/sysent.h>
58 #include <sys/systm.h>
59 #include <sys/vnode.h>
61 #include <sys/socket.h>
62 #include <sys/socketvar.h>
65 #include <sys/sysctl.h>
66 #include <sys/syslog.h>
68 #include <fs/devfs/devfs.h>
70 #include <net/bpfdesc.h>
72 #include <net/if_types.h>
73 #include <net/if_var.h>
75 #include <netinet/in.h>
76 #include <netinet/in_pcb.h>
77 #include <netinet/ip_var.h>
81 #include <security/mac/mac_policy.h>
82 #include <security/mac/mac_framework.h>
83 #include <security/mac_lomac/mac_lomac.h>
85 struct mac_lomac_proc {
86 struct mac_lomac mac_lomac;
90 SYSCTL_DECL(_security_mac);
92 SYSCTL_NODE(_security_mac, OID_AUTO, lomac, CTLFLAG_RW, 0,
93 "TrustedBSD mac_lomac policy controls");
95 static int lomac_label_size = sizeof(struct mac_lomac);
96 SYSCTL_INT(_security_mac_lomac, OID_AUTO, label_size, CTLFLAG_RD,
97 &lomac_label_size, 0, "Size of struct mac_lomac");
99 static int lomac_enabled = 1;
100 SYSCTL_INT(_security_mac_lomac, OID_AUTO, enabled, CTLFLAG_RW,
101 &lomac_enabled, 0, "Enforce MAC/LOMAC policy");
102 TUNABLE_INT("security.mac.lomac.enabled", &lomac_enabled);
104 static int destroyed_not_inited;
105 SYSCTL_INT(_security_mac_lomac, OID_AUTO, destroyed_not_inited, CTLFLAG_RD,
106 &destroyed_not_inited, 0, "Count of labels destroyed but not inited");
108 static int trust_all_interfaces = 0;
109 SYSCTL_INT(_security_mac_lomac, OID_AUTO, trust_all_interfaces, CTLFLAG_RD,
110 &trust_all_interfaces, 0, "Consider all interfaces 'trusted' by MAC/LOMAC");
111 TUNABLE_INT("security.mac.lomac.trust_all_interfaces", &trust_all_interfaces);
113 static char trusted_interfaces[128];
114 SYSCTL_STRING(_security_mac_lomac, OID_AUTO, trusted_interfaces, CTLFLAG_RD,
115 trusted_interfaces, 0, "Interfaces considered 'trusted' by MAC/LOMAC");
116 TUNABLE_STR("security.mac.lomac.trusted_interfaces", trusted_interfaces,
117 sizeof(trusted_interfaces));
119 static int ptys_equal = 0;
120 SYSCTL_INT(_security_mac_lomac, OID_AUTO, ptys_equal, CTLFLAG_RW,
121 &ptys_equal, 0, "Label pty devices as lomac/equal on create");
122 TUNABLE_INT("security.mac.lomac.ptys_equal", &ptys_equal);
124 static int revocation_enabled = 1;
125 SYSCTL_INT(_security_mac_lomac, OID_AUTO, revocation_enabled, CTLFLAG_RW,
126 &revocation_enabled, 0, "Revoke access to objects on relabel");
127 TUNABLE_INT("security.mac.lomac.revocation_enabled", &revocation_enabled);
129 static int lomac_slot;
130 #define SLOT(l) ((struct mac_lomac *)mac_label_get((l), lomac_slot))
131 #define SLOT_SET(l, val) mac_label_set((l), lomac_slot, (uintptr_t)(val))
132 #define PSLOT(l) ((struct mac_lomac_proc *) \
133 mac_label_get((l), lomac_slot))
134 #define PSLOT_SET(l, val) mac_label_set((l), lomac_slot, (uintptr_t)(val))
136 MALLOC_DEFINE(M_LOMAC, "mac_lomac_label", "MAC/LOMAC labels");
138 static struct mac_lomac *
139 lomac_alloc(int flag)
141 struct mac_lomac *ml;
143 ml = malloc(sizeof(*ml), M_LOMAC, M_ZERO | flag);
149 lomac_free(struct mac_lomac *ml)
155 atomic_add_int(&destroyed_not_inited, 1);
159 lomac_atmostflags(struct mac_lomac *ml, int flags)
162 if ((ml->ml_flags & flags) != ml->ml_flags)
168 lomac_dominate_element(struct mac_lomac_element *a,
169 struct mac_lomac_element *b)
172 switch (a->mle_type) {
173 case MAC_LOMAC_TYPE_EQUAL:
174 case MAC_LOMAC_TYPE_HIGH:
177 case MAC_LOMAC_TYPE_LOW:
178 switch (b->mle_type) {
179 case MAC_LOMAC_TYPE_GRADE:
180 case MAC_LOMAC_TYPE_HIGH:
183 case MAC_LOMAC_TYPE_EQUAL:
184 case MAC_LOMAC_TYPE_LOW:
188 panic("lomac_dominate_element: b->mle_type invalid");
191 case MAC_LOMAC_TYPE_GRADE:
192 switch (b->mle_type) {
193 case MAC_LOMAC_TYPE_EQUAL:
194 case MAC_LOMAC_TYPE_LOW:
197 case MAC_LOMAC_TYPE_HIGH:
200 case MAC_LOMAC_TYPE_GRADE:
201 return (a->mle_grade >= b->mle_grade);
204 panic("lomac_dominate_element: b->mle_type invalid");
208 panic("lomac_dominate_element: a->mle_type invalid");
213 lomac_range_in_range(struct mac_lomac *rangea, struct mac_lomac *rangeb)
216 return (lomac_dominate_element(&rangeb->ml_rangehigh,
217 &rangea->ml_rangehigh) &&
218 lomac_dominate_element(&rangea->ml_rangelow,
219 &rangeb->ml_rangelow));
223 lomac_single_in_range(struct mac_lomac *single, struct mac_lomac *range)
226 KASSERT((single->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
227 ("lomac_single_in_range: a not single"));
228 KASSERT((range->ml_flags & MAC_LOMAC_FLAG_RANGE) != 0,
229 ("lomac_single_in_range: b not range"));
231 return (lomac_dominate_element(&range->ml_rangehigh,
232 &single->ml_single) && lomac_dominate_element(&single->ml_single,
233 &range->ml_rangelow));
237 lomac_auxsingle_in_range(struct mac_lomac *single, struct mac_lomac *range)
240 KASSERT((single->ml_flags & MAC_LOMAC_FLAG_AUX) != 0,
241 ("lomac_single_in_range: a not auxsingle"));
242 KASSERT((range->ml_flags & MAC_LOMAC_FLAG_RANGE) != 0,
243 ("lomac_single_in_range: b not range"));
245 return (lomac_dominate_element(&range->ml_rangehigh,
246 &single->ml_auxsingle) &&
247 lomac_dominate_element(&single->ml_auxsingle,
248 &range->ml_rangelow));
252 lomac_dominate_single(struct mac_lomac *a, struct mac_lomac *b)
254 KASSERT((a->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
255 ("lomac_dominate_single: a not single"));
256 KASSERT((b->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
257 ("lomac_dominate_single: b not single"));
259 return (lomac_dominate_element(&a->ml_single, &b->ml_single));
263 lomac_subject_dominate(struct mac_lomac *a, struct mac_lomac *b)
265 KASSERT((~a->ml_flags &
266 (MAC_LOMAC_FLAG_SINGLE | MAC_LOMAC_FLAG_RANGE)) == 0,
267 ("lomac_dominate_single: a not subject"));
268 KASSERT((b->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
269 ("lomac_dominate_single: b not single"));
271 return (lomac_dominate_element(&a->ml_rangehigh, &b->ml_single));
275 lomac_equal_element(struct mac_lomac_element *a, struct mac_lomac_element *b)
278 if (a->mle_type == MAC_LOMAC_TYPE_EQUAL ||
279 b->mle_type == MAC_LOMAC_TYPE_EQUAL)
282 return (a->mle_type == b->mle_type && a->mle_grade == b->mle_grade);
286 lomac_equal_single(struct mac_lomac *a, struct mac_lomac *b)
289 KASSERT((a->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
290 ("lomac_equal_single: a not single"));
291 KASSERT((b->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
292 ("lomac_equal_single: b not single"));
294 return (lomac_equal_element(&a->ml_single, &b->ml_single));
298 lomac_contains_equal(struct mac_lomac *ml)
301 if (ml->ml_flags & MAC_LOMAC_FLAG_SINGLE)
302 if (ml->ml_single.mle_type == MAC_LOMAC_TYPE_EQUAL)
304 if (ml->ml_flags & MAC_LOMAC_FLAG_AUX)
305 if (ml->ml_auxsingle.mle_type == MAC_LOMAC_TYPE_EQUAL)
308 if (ml->ml_flags & MAC_LOMAC_FLAG_RANGE) {
309 if (ml->ml_rangelow.mle_type == MAC_LOMAC_TYPE_EQUAL)
311 if (ml->ml_rangehigh.mle_type == MAC_LOMAC_TYPE_EQUAL)
319 lomac_subject_privileged(struct mac_lomac *ml)
322 KASSERT((ml->ml_flags & MAC_LOMAC_FLAGS_BOTH) ==
323 MAC_LOMAC_FLAGS_BOTH,
324 ("lomac_subject_privileged: subject doesn't have both labels"));
326 /* If the single is EQUAL, it's ok. */
327 if (ml->ml_single.mle_type == MAC_LOMAC_TYPE_EQUAL)
330 /* If either range endpoint is EQUAL, it's ok. */
331 if (ml->ml_rangelow.mle_type == MAC_LOMAC_TYPE_EQUAL ||
332 ml->ml_rangehigh.mle_type == MAC_LOMAC_TYPE_EQUAL)
335 /* If the range is low-high, it's ok. */
336 if (ml->ml_rangelow.mle_type == MAC_LOMAC_TYPE_LOW &&
337 ml->ml_rangehigh.mle_type == MAC_LOMAC_TYPE_HIGH)
345 lomac_high_single(struct mac_lomac *ml)
348 KASSERT((ml->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
349 ("lomac_high_single: mac_lomac not single"));
351 return (ml->ml_single.mle_type == MAC_LOMAC_TYPE_HIGH);
355 lomac_valid(struct mac_lomac *ml)
358 if (ml->ml_flags & MAC_LOMAC_FLAG_SINGLE) {
359 switch (ml->ml_single.mle_type) {
360 case MAC_LOMAC_TYPE_GRADE:
361 case MAC_LOMAC_TYPE_EQUAL:
362 case MAC_LOMAC_TYPE_HIGH:
363 case MAC_LOMAC_TYPE_LOW:
370 if (ml->ml_single.mle_type != MAC_LOMAC_TYPE_UNDEF)
374 if (ml->ml_flags & MAC_LOMAC_FLAG_AUX) {
375 switch (ml->ml_auxsingle.mle_type) {
376 case MAC_LOMAC_TYPE_GRADE:
377 case MAC_LOMAC_TYPE_EQUAL:
378 case MAC_LOMAC_TYPE_HIGH:
379 case MAC_LOMAC_TYPE_LOW:
386 if (ml->ml_auxsingle.mle_type != MAC_LOMAC_TYPE_UNDEF)
390 if (ml->ml_flags & MAC_LOMAC_FLAG_RANGE) {
391 switch (ml->ml_rangelow.mle_type) {
392 case MAC_LOMAC_TYPE_GRADE:
393 case MAC_LOMAC_TYPE_EQUAL:
394 case MAC_LOMAC_TYPE_HIGH:
395 case MAC_LOMAC_TYPE_LOW:
402 switch (ml->ml_rangehigh.mle_type) {
403 case MAC_LOMAC_TYPE_GRADE:
404 case MAC_LOMAC_TYPE_EQUAL:
405 case MAC_LOMAC_TYPE_HIGH:
406 case MAC_LOMAC_TYPE_LOW:
412 if (!lomac_dominate_element(&ml->ml_rangehigh,
416 if (ml->ml_rangelow.mle_type != MAC_LOMAC_TYPE_UNDEF ||
417 ml->ml_rangehigh.mle_type != MAC_LOMAC_TYPE_UNDEF)
425 lomac_set_range(struct mac_lomac *ml, u_short typelow, u_short gradelow,
426 u_short typehigh, u_short gradehigh)
429 ml->ml_rangelow.mle_type = typelow;
430 ml->ml_rangelow.mle_grade = gradelow;
431 ml->ml_rangehigh.mle_type = typehigh;
432 ml->ml_rangehigh.mle_grade = gradehigh;
433 ml->ml_flags |= MAC_LOMAC_FLAG_RANGE;
437 lomac_set_single(struct mac_lomac *ml, u_short type, u_short grade)
440 ml->ml_single.mle_type = type;
441 ml->ml_single.mle_grade = grade;
442 ml->ml_flags |= MAC_LOMAC_FLAG_SINGLE;
446 lomac_copy_range(struct mac_lomac *labelfrom, struct mac_lomac *labelto)
449 KASSERT((labelfrom->ml_flags & MAC_LOMAC_FLAG_RANGE) != 0,
450 ("lomac_copy_range: labelfrom not range"));
452 labelto->ml_rangelow = labelfrom->ml_rangelow;
453 labelto->ml_rangehigh = labelfrom->ml_rangehigh;
454 labelto->ml_flags |= MAC_LOMAC_FLAG_RANGE;
458 lomac_copy_single(struct mac_lomac *labelfrom, struct mac_lomac *labelto)
461 KASSERT((labelfrom->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0,
462 ("lomac_copy_single: labelfrom not single"));
464 labelto->ml_single = labelfrom->ml_single;
465 labelto->ml_flags |= MAC_LOMAC_FLAG_SINGLE;
469 lomac_copy_auxsingle(struct mac_lomac *labelfrom, struct mac_lomac *labelto)
472 KASSERT((labelfrom->ml_flags & MAC_LOMAC_FLAG_AUX) != 0,
473 ("lomac_copy_auxsingle: labelfrom not auxsingle"));
475 labelto->ml_auxsingle = labelfrom->ml_auxsingle;
476 labelto->ml_flags |= MAC_LOMAC_FLAG_AUX;
480 lomac_copy(struct mac_lomac *source, struct mac_lomac *dest)
483 if (source->ml_flags & MAC_LOMAC_FLAG_SINGLE)
484 lomac_copy_single(source, dest);
485 if (source->ml_flags & MAC_LOMAC_FLAG_AUX)
486 lomac_copy_auxsingle(source, dest);
487 if (source->ml_flags & MAC_LOMAC_FLAG_RANGE)
488 lomac_copy_range(source, dest);
491 static int lomac_to_string(struct sbuf *sb, struct mac_lomac *ml);
494 maybe_demote(struct mac_lomac *subjlabel, struct mac_lomac *objlabel,
495 const char *actionname, const char *objname, struct vnode *vp)
497 struct sbuf subjlabel_sb, subjtext_sb, objlabel_sb;
498 char *subjlabeltext, *objlabeltext, *subjtext;
499 struct mac_lomac cached_subjlabel;
500 struct mac_lomac_proc *subj;
505 subj = PSLOT(curthread->td_proc->p_label);
507 p = curthread->td_proc;
508 mtx_lock(&subj->mtx);
509 if (subj->mac_lomac.ml_flags & MAC_LOMAC_FLAG_UPDATE) {
511 * Check to see if the pending demotion would be more or less
512 * severe than this one, and keep the more severe. This can
513 * only happen for a multi-threaded application.
515 if (lomac_dominate_single(objlabel, &subj->mac_lomac)) {
516 mtx_unlock(&subj->mtx);
520 bzero(&subj->mac_lomac, sizeof(subj->mac_lomac));
522 * Always demote the single label.
524 lomac_copy_single(objlabel, &subj->mac_lomac);
526 * Start with the original range, then minimize each side of the
527 * range to the point of not dominating the object. The high side
528 * will always be demoted, of course.
530 lomac_copy_range(subjlabel, &subj->mac_lomac);
531 if (!lomac_dominate_element(&objlabel->ml_single,
532 &subj->mac_lomac.ml_rangelow))
533 subj->mac_lomac.ml_rangelow = objlabel->ml_single;
534 subj->mac_lomac.ml_rangehigh = objlabel->ml_single;
535 subj->mac_lomac.ml_flags |= MAC_LOMAC_FLAG_UPDATE;
536 thread_lock(curthread);
537 curthread->td_flags |= TDF_ASTPENDING | TDF_MACPEND;
538 thread_unlock(curthread);
541 * Avoid memory allocation while holding a mutex; cache the label.
543 lomac_copy_single(&subj->mac_lomac, &cached_subjlabel);
544 mtx_unlock(&subj->mtx);
546 sbuf_new(&subjlabel_sb, NULL, 0, SBUF_AUTOEXTEND);
547 lomac_to_string(&subjlabel_sb, subjlabel);
548 sbuf_finish(&subjlabel_sb);
549 subjlabeltext = sbuf_data(&subjlabel_sb);
551 sbuf_new(&subjtext_sb, NULL, 0, SBUF_AUTOEXTEND);
552 lomac_to_string(&subjtext_sb, &subj->mac_lomac);
553 sbuf_finish(&subjtext_sb);
554 subjtext = sbuf_data(&subjtext_sb);
556 sbuf_new(&objlabel_sb, NULL, 0, SBUF_AUTOEXTEND);
557 lomac_to_string(&objlabel_sb, objlabel);
558 sbuf_finish(&objlabel_sb);
559 objlabeltext = sbuf_data(&objlabel_sb);
561 pgid = p->p_pgrp->pg_id; /* XXX could be stale? */
562 if (vp != NULL && VOP_GETATTR(vp, &va, curthread->td_ucred,
564 log(LOG_INFO, "LOMAC: level-%s subject p%dg%du%d:%s demoted to"
565 " level %s after %s a level-%s %s (inode=%ld, "
567 subjlabeltext, p->p_pid, pgid, curthread->td_ucred->cr_uid,
568 p->p_comm, subjtext, actionname, objlabeltext, objname,
569 va.va_fileid, vp->v_mount->mnt_stat.f_mntonname);
571 log(LOG_INFO, "LOMAC: level-%s subject p%dg%du%d:%s demoted to"
572 " level %s after %s a level-%s %s\n",
573 subjlabeltext, p->p_pid, pgid, curthread->td_ucred->cr_uid,
574 p->p_comm, subjtext, actionname, objlabeltext, objname);
577 sbuf_delete(&subjlabel_sb);
578 sbuf_delete(&subjtext_sb);
579 sbuf_delete(&objlabel_sb);
585 * Relabel "to" to "from" only if "from" is a valid label (contains at least
586 * a single), as for a relabel operation which may or may not involve a
590 try_relabel(struct mac_lomac *from, struct mac_lomac *to)
593 if (from->ml_flags & MAC_LOMAC_FLAG_SINGLE) {
594 bzero(to, sizeof(*to));
595 lomac_copy(from, to);
600 * Policy module operations.
603 lomac_init(struct mac_policy_conf *conf)
612 lomac_init_label(struct label *label)
615 SLOT_SET(label, lomac_alloc(M_WAITOK));
619 lomac_init_label_waitcheck(struct label *label, int flag)
622 SLOT_SET(label, lomac_alloc(flag));
623 if (SLOT(label) == NULL)
630 lomac_init_proc_label(struct label *label)
633 PSLOT_SET(label, malloc(sizeof(struct mac_lomac_proc), M_LOMAC,
635 mtx_init(&PSLOT(label)->mtx, "MAC/Lomac proc lock", NULL, MTX_DEF);
639 lomac_destroy_label(struct label *label)
642 lomac_free(SLOT(label));
643 SLOT_SET(label, NULL);
647 lomac_destroy_proc_label(struct label *label)
650 mtx_destroy(&PSLOT(label)->mtx);
651 FREE(PSLOT(label), M_LOMAC);
652 PSLOT_SET(label, NULL);
656 lomac_element_to_string(struct sbuf *sb, struct mac_lomac_element *element)
659 switch (element->mle_type) {
660 case MAC_LOMAC_TYPE_HIGH:
661 return (sbuf_printf(sb, "high"));
663 case MAC_LOMAC_TYPE_LOW:
664 return (sbuf_printf(sb, "low"));
666 case MAC_LOMAC_TYPE_EQUAL:
667 return (sbuf_printf(sb, "equal"));
669 case MAC_LOMAC_TYPE_GRADE:
670 return (sbuf_printf(sb, "%d", element->mle_grade));
673 panic("lomac_element_to_string: invalid type (%d)",
679 lomac_to_string(struct sbuf *sb, struct mac_lomac *ml)
682 if (ml->ml_flags & MAC_LOMAC_FLAG_SINGLE) {
683 if (lomac_element_to_string(sb, &ml->ml_single) == -1)
687 if (ml->ml_flags & MAC_LOMAC_FLAG_AUX) {
688 if (sbuf_putc(sb, '[') == -1)
691 if (lomac_element_to_string(sb, &ml->ml_auxsingle) == -1)
694 if (sbuf_putc(sb, ']') == -1)
698 if (ml->ml_flags & MAC_LOMAC_FLAG_RANGE) {
699 if (sbuf_putc(sb, '(') == -1)
702 if (lomac_element_to_string(sb, &ml->ml_rangelow) == -1)
705 if (sbuf_putc(sb, '-') == -1)
708 if (lomac_element_to_string(sb, &ml->ml_rangehigh) == -1)
711 if (sbuf_putc(sb, ')') == -1)
719 lomac_externalize_label(struct label *label, char *element_name,
720 struct sbuf *sb, int *claimed)
722 struct mac_lomac *ml;
724 if (strcmp(MAC_LOMAC_LABEL_NAME, element_name) != 0)
731 return (lomac_to_string(sb, ml));
735 lomac_parse_element(struct mac_lomac_element *element, char *string)
738 if (strcmp(string, "high") == 0 || strcmp(string, "hi") == 0) {
739 element->mle_type = MAC_LOMAC_TYPE_HIGH;
740 element->mle_grade = MAC_LOMAC_TYPE_UNDEF;
741 } else if (strcmp(string, "low") == 0 || strcmp(string, "lo") == 0) {
742 element->mle_type = MAC_LOMAC_TYPE_LOW;
743 element->mle_grade = MAC_LOMAC_TYPE_UNDEF;
744 } else if (strcmp(string, "equal") == 0 ||
745 strcmp(string, "eq") == 0) {
746 element->mle_type = MAC_LOMAC_TYPE_EQUAL;
747 element->mle_grade = MAC_LOMAC_TYPE_UNDEF;
753 d = strtol(p0, &p1, 10);
755 if (d < 0 || d > 65535)
757 element->mle_type = MAC_LOMAC_TYPE_GRADE;
758 element->mle_grade = d;
760 if (p1 == p0 || *p1 != '\0')
768 * Note: destructively consumes the string, make a local copy before calling
769 * if that's a problem.
772 lomac_parse(struct mac_lomac *ml, char *string)
774 char *range, *rangeend, *rangehigh, *rangelow, *single, *auxsingle,
778 /* Do we have a range? */
780 range = index(string, '(');
783 auxsingle = index(string, '[');
784 if (auxsingle == single)
786 if (range != NULL && auxsingle != NULL)
788 rangelow = rangehigh = NULL;
790 /* Nul terminate the end of the single string. */
794 rangehigh = index(rangelow, '-');
795 if (rangehigh == NULL)
798 if (*rangelow == '\0' || *rangehigh == '\0')
800 rangeend = index(rangehigh, ')');
801 if (rangeend == NULL)
803 if (*(rangeend + 1) != '\0')
805 /* Nul terminate the ends of the ranges. */
806 *(rangehigh - 1) = '\0';
809 KASSERT((rangelow != NULL && rangehigh != NULL) ||
810 (rangelow == NULL && rangehigh == NULL),
811 ("lomac_internalize_label: range mismatch"));
812 if (auxsingle != NULL) {
813 /* Nul terminate the end of the single string. */
816 auxsingleend = index(auxsingle, ']');
817 if (auxsingleend == NULL)
819 if (*(auxsingleend + 1) != '\0')
821 /* Nul terminate the end of the auxsingle. */
822 *auxsingleend = '\0';
825 bzero(ml, sizeof(*ml));
826 if (single != NULL) {
827 error = lomac_parse_element(&ml->ml_single, single);
830 ml->ml_flags |= MAC_LOMAC_FLAG_SINGLE;
833 if (auxsingle != NULL) {
834 error = lomac_parse_element(&ml->ml_auxsingle, auxsingle);
837 ml->ml_flags |= MAC_LOMAC_FLAG_AUX;
840 if (rangelow != NULL) {
841 error = lomac_parse_element(&ml->ml_rangelow, rangelow);
844 error = lomac_parse_element(&ml->ml_rangehigh, rangehigh);
847 ml->ml_flags |= MAC_LOMAC_FLAG_RANGE;
850 error = lomac_valid(ml);
858 lomac_internalize_label(struct label *label, char *element_name,
859 char *element_data, int *claimed)
861 struct mac_lomac *ml, ml_temp;
864 if (strcmp(MAC_LOMAC_LABEL_NAME, element_name) != 0)
869 error = lomac_parse(&ml_temp, element_data);
880 lomac_copy_label(struct label *src, struct label *dest)
883 *SLOT(dest) = *SLOT(src);
887 * Labeling event operations: file system objects, and things that look a lot
888 * like file system objects.
891 lomac_create_devfs_device(struct ucred *cred, struct mount *mp,
892 struct cdev *dev, struct devfs_dirent *de, struct label *delabel)
894 struct mac_lomac *ml;
898 if (strcmp(dev->si_name, "null") == 0 ||
899 strcmp(dev->si_name, "zero") == 0 ||
900 strcmp(dev->si_name, "random") == 0 ||
901 strncmp(dev->si_name, "fd/", strlen("fd/")) == 0 ||
902 strncmp(dev->si_name, "ttyv", strlen("ttyv")) == 0)
903 lomac_type = MAC_LOMAC_TYPE_EQUAL;
904 else if (ptys_equal &&
905 (strncmp(dev->si_name, "ttyp", strlen("ttyp")) == 0 ||
906 strncmp(dev->si_name, "ptyp", strlen("ptyp")) == 0))
907 lomac_type = MAC_LOMAC_TYPE_EQUAL;
909 lomac_type = MAC_LOMAC_TYPE_HIGH;
910 lomac_set_single(ml, lomac_type, 0);
914 lomac_create_devfs_directory(struct mount *mp, char *dirname,
915 int dirnamelen, struct devfs_dirent *de, struct label *delabel)
917 struct mac_lomac *ml;
920 lomac_set_single(ml, MAC_LOMAC_TYPE_HIGH, 0);
924 lomac_create_devfs_symlink(struct ucred *cred, struct mount *mp,
925 struct devfs_dirent *dd, struct label *ddlabel, struct devfs_dirent *de,
926 struct label *delabel)
928 struct mac_lomac *source, *dest;
930 source = SLOT(cred->cr_label);
931 dest = SLOT(delabel);
933 lomac_copy_single(source, dest);
937 lomac_create_mount(struct ucred *cred, struct mount *mp,
938 struct label *mplabel)
940 struct mac_lomac *source, *dest;
942 source = SLOT(cred->cr_label);
943 dest = SLOT(mplabel);
944 lomac_copy_single(source, dest);
948 lomac_relabel_vnode(struct ucred *cred, struct vnode *vp,
949 struct label *vplabel, struct label *newlabel)
951 struct mac_lomac *source, *dest;
953 source = SLOT(newlabel);
954 dest = SLOT(vplabel);
956 try_relabel(source, dest);
960 lomac_update_devfs(struct mount *mp, struct devfs_dirent *de,
961 struct label *delabel, struct vnode *vp, struct label *vplabel)
963 struct mac_lomac *source, *dest;
965 source = SLOT(vplabel);
966 dest = SLOT(delabel);
968 lomac_copy(source, dest);
972 lomac_associate_vnode_devfs(struct mount *mp, struct label *mplabel,
973 struct devfs_dirent *de, struct label *delabel, struct vnode *vp,
974 struct label *vplabel)
976 struct mac_lomac *source, *dest;
978 source = SLOT(delabel);
979 dest = SLOT(vplabel);
981 lomac_copy_single(source, dest);
985 lomac_associate_vnode_extattr(struct mount *mp, struct label *mplabel,
986 struct vnode *vp, struct label *vplabel)
988 struct mac_lomac temp, *source, *dest;
991 source = SLOT(mplabel);
992 dest = SLOT(vplabel);
994 buflen = sizeof(temp);
995 bzero(&temp, buflen);
997 error = vn_extattr_get(vp, IO_NODELOCKED, MAC_LOMAC_EXTATTR_NAMESPACE,
998 MAC_LOMAC_EXTATTR_NAME, &buflen, (char *)&temp, curthread);
999 if (error == ENOATTR || error == EOPNOTSUPP) {
1000 /* Fall back to the mntlabel. */
1001 lomac_copy_single(source, dest);
1006 if (buflen != sizeof(temp)) {
1007 if (buflen != sizeof(temp) - sizeof(temp.ml_auxsingle)) {
1008 printf("lomac_associate_vnode_extattr: bad size %d\n",
1012 bzero(&temp.ml_auxsingle, sizeof(temp.ml_auxsingle));
1013 buflen = sizeof(temp);
1014 (void)vn_extattr_set(vp, IO_NODELOCKED,
1015 MAC_LOMAC_EXTATTR_NAMESPACE, MAC_LOMAC_EXTATTR_NAME,
1016 buflen, (char *)&temp, curthread);
1018 if (lomac_valid(&temp) != 0) {
1019 printf("lomac_associate_vnode_extattr: invalid\n");
1022 if ((temp.ml_flags & MAC_LOMAC_FLAGS_BOTH) != MAC_LOMAC_FLAG_SINGLE) {
1023 printf("lomac_associate_vnode_extattr: not single\n");
1027 lomac_copy_single(&temp, dest);
1032 lomac_associate_vnode_singlelabel(struct mount *mp,
1033 struct label *mplabel, struct vnode *vp, struct label *vplabel)
1035 struct mac_lomac *source, *dest;
1037 source = SLOT(mplabel);
1038 dest = SLOT(vplabel);
1040 lomac_copy_single(source, dest);
1044 lomac_create_vnode_extattr(struct ucred *cred, struct mount *mp,
1045 struct label *mplabel, struct vnode *dvp, struct label *dvplabel,
1046 struct vnode *vp, struct label *vplabel, struct componentname *cnp)
1048 struct mac_lomac *source, *dest, *dir, temp;
1052 buflen = sizeof(temp);
1053 bzero(&temp, buflen);
1055 source = SLOT(cred->cr_label);
1056 dest = SLOT(vplabel);
1057 dir = SLOT(dvplabel);
1058 if (dir->ml_flags & MAC_LOMAC_FLAG_AUX) {
1059 lomac_copy_auxsingle(dir, &temp);
1060 lomac_set_single(&temp, dir->ml_auxsingle.mle_type,
1061 dir->ml_auxsingle.mle_grade);
1063 lomac_copy_single(source, &temp);
1066 error = vn_extattr_set(vp, IO_NODELOCKED, MAC_LOMAC_EXTATTR_NAMESPACE,
1067 MAC_LOMAC_EXTATTR_NAME, buflen, (char *)&temp, curthread);
1069 lomac_copy(&temp, dest);
1074 lomac_setlabel_vnode_extattr(struct ucred *cred, struct vnode *vp,
1075 struct label *vplabel, struct label *intlabel)
1077 struct mac_lomac *source, temp;
1081 buflen = sizeof(temp);
1082 bzero(&temp, buflen);
1084 source = SLOT(intlabel);
1085 if ((source->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0)
1088 lomac_copy_single(source, &temp);
1089 error = vn_extattr_set(vp, IO_NODELOCKED, MAC_LOMAC_EXTATTR_NAMESPACE,
1090 MAC_LOMAC_EXTATTR_NAME, buflen, (char *)&temp, curthread);
1095 * Labeling event operations: IPC object.
1098 lomac_create_inpcb_from_socket(struct socket *so, struct label *solabel,
1099 struct inpcb *inp, struct label *inplabel)
1101 struct mac_lomac *source, *dest;
1103 source = SLOT(solabel);
1104 dest = SLOT(inplabel);
1106 lomac_copy_single(source, dest);
1110 lomac_create_mbuf_from_socket(struct socket *so, struct label *solabel,
1111 struct mbuf *m, struct label *mlabel)
1113 struct mac_lomac *source, *dest;
1115 source = SLOT(solabel);
1116 dest = SLOT(mlabel);
1118 lomac_copy_single(source, dest);
1122 lomac_create_socket(struct ucred *cred, struct socket *so,
1123 struct label *solabel)
1125 struct mac_lomac *source, *dest;
1127 source = SLOT(cred->cr_label);
1128 dest = SLOT(solabel);
1130 lomac_copy_single(source, dest);
1134 lomac_create_pipe(struct ucred *cred, struct pipepair *pp,
1135 struct label *pplabel)
1137 struct mac_lomac *source, *dest;
1139 source = SLOT(cred->cr_label);
1140 dest = SLOT(pplabel);
1142 lomac_copy_single(source, dest);
1146 lomac_create_socket_from_socket(struct socket *oldso,
1147 struct label *oldsolabel, struct socket *newso, struct label *newsolabel)
1149 struct mac_lomac *source, *dest;
1151 source = SLOT(oldsolabel);
1152 dest = SLOT(newsolabel);
1154 lomac_copy_single(source, dest);
1158 lomac_relabel_socket(struct ucred *cred, struct socket *so,
1159 struct label *solabel, struct label *newlabel)
1161 struct mac_lomac *source, *dest;
1163 source = SLOT(newlabel);
1164 dest = SLOT(solabel);
1166 try_relabel(source, dest);
1170 lomac_relabel_pipe(struct ucred *cred, struct pipepair *pp,
1171 struct label *pplabel, struct label *newlabel)
1173 struct mac_lomac *source, *dest;
1175 source = SLOT(newlabel);
1176 dest = SLOT(pplabel);
1178 try_relabel(source, dest);
1182 lomac_set_socket_peer_from_mbuf(struct mbuf *m, struct label *mlabel,
1183 struct socket *so, struct label *sopeerlabel)
1185 struct mac_lomac *source, *dest;
1187 source = SLOT(mlabel);
1188 dest = SLOT(sopeerlabel);
1190 lomac_copy_single(source, dest);
1194 * Labeling event operations: network objects.
1197 lomac_set_socket_peer_from_socket(struct socket *oldso,
1198 struct label *oldsolabel, struct socket *newso,
1199 struct label *newsopeerlabel)
1201 struct mac_lomac *source, *dest;
1203 source = SLOT(oldsolabel);
1204 dest = SLOT(newsopeerlabel);
1206 lomac_copy_single(source, dest);
1210 lomac_create_bpfdesc(struct ucred *cred, struct bpf_d *d,
1211 struct label *dlabel)
1213 struct mac_lomac *source, *dest;
1215 source = SLOT(cred->cr_label);
1216 dest = SLOT(dlabel);
1218 lomac_copy_single(source, dest);
1222 lomac_create_ifnet(struct ifnet *ifp, struct label *ifplabel)
1224 char tifname[IFNAMSIZ], *p, *q;
1225 char tiflist[sizeof(trusted_interfaces)];
1226 struct mac_lomac *dest;
1229 dest = SLOT(ifplabel);
1231 if (ifp->if_type == IFT_LOOP) {
1232 grade = MAC_LOMAC_TYPE_EQUAL;
1236 if (trust_all_interfaces) {
1237 grade = MAC_LOMAC_TYPE_HIGH;
1241 grade = MAC_LOMAC_TYPE_LOW;
1243 if (trusted_interfaces[0] == '\0' ||
1244 !strvalid(trusted_interfaces, sizeof(trusted_interfaces)))
1247 bzero(tiflist, sizeof(tiflist));
1248 for (p = trusted_interfaces, q = tiflist; *p != '\0'; p++, q++)
1249 if(*p != ' ' && *p != '\t')
1252 for (p = q = tiflist;; p++) {
1253 if (*p == ',' || *p == '\0') {
1255 if (len < IFNAMSIZ) {
1256 bzero(tifname, sizeof(tifname));
1257 bcopy(q, tifname, len);
1258 if (strcmp(tifname, ifp->if_xname) == 0) {
1259 grade = MAC_LOMAC_TYPE_HIGH;
1265 printf("MAC/LOMAC warning: interface name "
1266 "\"%s\" is too long (must be < %d)\n",
1275 lomac_set_single(dest, grade, 0);
1276 lomac_set_range(dest, grade, 0, grade, 0);
1280 lomac_create_ipq(struct mbuf *m, struct label *mlabel, struct ipq *q,
1281 struct label *qlabel)
1283 struct mac_lomac *source, *dest;
1285 source = SLOT(mlabel);
1286 dest = SLOT(qlabel);
1288 lomac_copy_single(source, dest);
1292 lomac_create_datagram_from_ipq(struct ipq *q, struct label *qlabel,
1293 struct mbuf *m, struct label *mlabel)
1295 struct mac_lomac *source, *dest;
1297 source = SLOT(qlabel);
1298 dest = SLOT(mlabel);
1300 /* Just use the head, since we require them all to match. */
1301 lomac_copy_single(source, dest);
1305 lomac_create_fragment(struct mbuf *m, struct label *mlabel,
1306 struct mbuf *frag, struct label *fraglabel)
1308 struct mac_lomac *source, *dest;
1310 source = SLOT(mlabel);
1311 dest = SLOT(fraglabel);
1313 lomac_copy_single(source, dest);
1317 lomac_create_mbuf_from_inpcb(struct inpcb *inp, struct label *inplabel,
1318 struct mbuf *m, struct label *mlabel)
1320 struct mac_lomac *source, *dest;
1322 source = SLOT(inplabel);
1323 dest = SLOT(mlabel);
1325 lomac_copy_single(source, dest);
1329 lomac_create_mbuf_linklayer(struct ifnet *ifp, struct label *ifplabel,
1330 struct mbuf *m, struct label *mlabel)
1332 struct mac_lomac *dest;
1334 dest = SLOT(mlabel);
1336 lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0);
1340 lomac_create_mbuf_from_bpfdesc(struct bpf_d *d, struct label *dlabel,
1341 struct mbuf *m, struct label *mlabel)
1343 struct mac_lomac *source, *dest;
1345 source = SLOT(dlabel);
1346 dest = SLOT(mlabel);
1348 lomac_copy_single(source, dest);
1352 lomac_create_mbuf_from_ifnet(struct ifnet *ifp, struct label *ifplabel,
1353 struct mbuf *m, struct label *mlabel)
1355 struct mac_lomac *source, *dest;
1357 source = SLOT(ifplabel);
1358 dest = SLOT(mlabel);
1360 lomac_copy_single(source, dest);
1364 lomac_create_mbuf_multicast_encap(struct mbuf *m, struct label *mlabel,
1365 struct ifnet *ifp, struct label *ifplabel, struct mbuf *mnew,
1366 struct label *mnewlabel)
1368 struct mac_lomac *source, *dest;
1370 source = SLOT(mlabel);
1371 dest = SLOT(mnewlabel);
1373 lomac_copy_single(source, dest);
1377 lomac_create_mbuf_netlayer(struct mbuf *m, struct label *mlabel,
1378 struct mbuf *mnew, struct label *mnewlabel)
1380 struct mac_lomac *source, *dest;
1382 source = SLOT(mlabel);
1383 dest = SLOT(mnewlabel);
1385 lomac_copy_single(source, dest);
1389 lomac_fragment_match(struct mbuf *m, struct label *mlabel, struct ipq *q,
1390 struct label *qlabel)
1392 struct mac_lomac *a, *b;
1397 return (lomac_equal_single(a, b));
1401 lomac_relabel_ifnet(struct ucred *cred, struct ifnet *ifp,
1402 struct label *ifplabel, struct label *newlabel)
1404 struct mac_lomac *source, *dest;
1406 source = SLOT(newlabel);
1407 dest = SLOT(ifplabel);
1409 try_relabel(source, dest);
1413 lomac_update_ipq(struct mbuf *m, struct label *mlabel, struct ipq *q,
1414 struct label *qlabel)
1417 /* NOOP: we only accept matching labels, so no need to update */
1421 lomac_inpcb_sosetlabel(struct socket *so, struct label *solabel,
1422 struct inpcb *inp, struct label *inplabel)
1424 struct mac_lomac *source, *dest;
1426 source = SLOT(solabel);
1427 dest = SLOT(inplabel);
1429 lomac_copy_single(source, dest);
1433 lomac_init_syncache_from_inpcb(struct label *label, struct inpcb *inp)
1435 struct mac_lomac *source, *dest;
1437 source = SLOT(inp->inp_label);
1439 lomac_copy(source, dest);
1443 lomac_create_mbuf_from_syncache(struct label *sc_label, struct mbuf *m,
1444 struct label *mlabel)
1446 struct mac_lomac *source, *dest;
1448 source = SLOT(sc_label);
1449 dest = SLOT(mlabel);
1450 lomac_copy(source, dest);
1454 lomac_create_mbuf_from_firewall(struct mbuf *m, struct label *mlabel)
1456 struct mac_lomac *dest;
1458 dest = SLOT(mlabel);
1460 /* XXX: where is the label for the firewall really comming from? */
1461 lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0);
1465 * Labeling event operations: processes.
1468 lomac_execve_transition(struct ucred *old, struct ucred *new,
1469 struct vnode *vp, struct label *vplabel, struct label *interpvnodelabel,
1470 struct image_params *imgp, struct label *execlabel)
1472 struct mac_lomac *source, *dest, *obj, *robj;
1474 source = SLOT(old->cr_label);
1475 dest = SLOT(new->cr_label);
1476 obj = SLOT(vplabel);
1477 robj = interpvnodelabel != NULL ? SLOT(interpvnodelabel) : obj;
1479 lomac_copy(source, dest);
1481 * If there's an auxiliary label on the real object, respect it and
1482 * assume that this level should be assumed immediately if a higher
1483 * level is currently in place.
1485 if (robj->ml_flags & MAC_LOMAC_FLAG_AUX &&
1486 !lomac_dominate_element(&robj->ml_auxsingle, &dest->ml_single)
1487 && lomac_auxsingle_in_range(robj, dest))
1488 lomac_set_single(dest, robj->ml_auxsingle.mle_type,
1489 robj->ml_auxsingle.mle_grade);
1491 * Restructuring to use the execve transitioning mechanism instead of
1492 * the normal demotion mechanism here would be difficult, so just
1493 * copy the label over and perform standard demotion. This is also
1494 * non-optimal because it will result in the intermediate label "new"
1495 * being created and immediately recycled.
1497 if (lomac_enabled && revocation_enabled &&
1498 !lomac_dominate_single(obj, source))
1499 (void)maybe_demote(source, obj, "executing", "file", vp);
1503 lomac_execve_will_transition(struct ucred *old, struct vnode *vp,
1504 struct label *vplabel, struct label *interpvnodelabel,
1505 struct image_params *imgp, struct label *execlabel)
1507 struct mac_lomac *subj, *obj, *robj;
1509 if (!lomac_enabled || !revocation_enabled)
1512 subj = SLOT(old->cr_label);
1513 obj = SLOT(vplabel);
1514 robj = interpvnodelabel != NULL ? SLOT(interpvnodelabel) : obj;
1516 return ((robj->ml_flags & MAC_LOMAC_FLAG_AUX &&
1517 !lomac_dominate_element(&robj->ml_auxsingle, &subj->ml_single)
1518 && lomac_auxsingle_in_range(robj, subj)) ||
1519 !lomac_dominate_single(obj, subj));
1523 lomac_create_proc0(struct ucred *cred)
1525 struct mac_lomac *dest;
1527 dest = SLOT(cred->cr_label);
1529 lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0);
1530 lomac_set_range(dest, MAC_LOMAC_TYPE_LOW, 0, MAC_LOMAC_TYPE_HIGH, 0);
1534 lomac_create_proc1(struct ucred *cred)
1536 struct mac_lomac *dest;
1538 dest = SLOT(cred->cr_label);
1540 lomac_set_single(dest, MAC_LOMAC_TYPE_HIGH, 0);
1541 lomac_set_range(dest, MAC_LOMAC_TYPE_LOW, 0, MAC_LOMAC_TYPE_HIGH, 0);
1545 lomac_relabel_cred(struct ucred *cred, struct label *newlabel)
1547 struct mac_lomac *source, *dest;
1549 source = SLOT(newlabel);
1550 dest = SLOT(cred->cr_label);
1552 try_relabel(source, dest);
1556 * Access control checks.
1559 lomac_check_bpfdesc_receive(struct bpf_d *d, struct label *dlabel,
1560 struct ifnet *ifp, struct label *ifplabel)
1562 struct mac_lomac *a, *b;
1570 if (lomac_equal_single(a, b))
1576 lomac_check_cred_relabel(struct ucred *cred, struct label *newlabel)
1578 struct mac_lomac *subj, *new;
1581 subj = SLOT(cred->cr_label);
1582 new = SLOT(newlabel);
1585 * If there is a LOMAC label update for the credential, it may be an
1586 * update of the single, range, or both.
1588 error = lomac_atmostflags(new, MAC_LOMAC_FLAGS_BOTH);
1593 * If the LOMAC label is to be changed, authorize as appropriate.
1595 if (new->ml_flags & MAC_LOMAC_FLAGS_BOTH) {
1597 * Fill in the missing parts from the previous label.
1599 if ((new->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0)
1600 lomac_copy_single(subj, new);
1601 if ((new->ml_flags & MAC_LOMAC_FLAG_RANGE) == 0)
1602 lomac_copy_range(subj, new);
1605 * To change the LOMAC range on a credential, the new range
1606 * label must be in the current range.
1608 if (!lomac_range_in_range(new, subj))
1612 * To change the LOMAC single label on a credential, the new
1613 * single label must be in the new range. Implicitly from
1614 * the previous check, the new single is in the old range.
1616 if (!lomac_single_in_range(new, new))
1620 * To have EQUAL in any component of the new credential LOMAC
1621 * label, the subject must already have EQUAL in their label.
1623 if (lomac_contains_equal(new)) {
1624 error = lomac_subject_privileged(subj);
1630 * XXXMAC: Additional consistency tests regarding the
1631 * single and range of the new label might be performed
1640 lomac_check_cred_visible(struct ucred *cr1, struct ucred *cr2)
1642 struct mac_lomac *subj, *obj;
1647 subj = SLOT(cr1->cr_label);
1648 obj = SLOT(cr2->cr_label);
1651 if (!lomac_dominate_single(obj, subj))
1658 lomac_check_ifnet_relabel(struct ucred *cred, struct ifnet *ifp,
1659 struct label *ifplabel, struct label *newlabel)
1661 struct mac_lomac *subj, *new;
1664 subj = SLOT(cred->cr_label);
1665 new = SLOT(newlabel);
1668 * If there is a LOMAC label update for the interface, it may be an
1669 * update of the single, range, or both.
1671 error = lomac_atmostflags(new, MAC_LOMAC_FLAGS_BOTH);
1676 * Relabling network interfaces requires LOMAC privilege.
1678 error = lomac_subject_privileged(subj);
1683 * If the LOMAC label is to be changed, authorize as appropriate.
1685 if (new->ml_flags & MAC_LOMAC_FLAGS_BOTH) {
1687 * Fill in the missing parts from the previous label.
1689 if ((new->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0)
1690 lomac_copy_single(subj, new);
1691 if ((new->ml_flags & MAC_LOMAC_FLAG_RANGE) == 0)
1692 lomac_copy_range(subj, new);
1695 * Rely on the traditional superuser status for the LOMAC
1696 * interface relabel requirements. XXXMAC: This will go
1699 * XXXRW: This is also redundant to a higher layer check.
1701 error = priv_check_cred(cred, PRIV_NET_SETIFMAC, 0);
1706 * XXXMAC: Additional consistency tests regarding the single
1707 * and the range of the new label might be performed here.
1715 lomac_check_ifnet_transmit(struct ifnet *ifp, struct label *ifplabel,
1716 struct mbuf *m, struct label *mlabel)
1718 struct mac_lomac *p, *i;
1726 return (lomac_single_in_range(p, i) ? 0 : EACCES);
1730 lomac_check_inpcb_deliver(struct inpcb *inp, struct label *inplabel,
1731 struct mbuf *m, struct label *mlabel)
1733 struct mac_lomac *p, *i;
1741 return (lomac_equal_single(p, i) ? 0 : EACCES);
1745 lomac_check_inpcb_visible(struct ucred *cred, struct inpcb *inp,
1746 struct label *inplabel)
1748 struct mac_lomac *subj, *obj;
1753 subj = SLOT(cred->cr_label);
1754 obj = SLOT(inplabel);
1756 if (!lomac_dominate_single(obj, subj))
1763 lomac_check_kld_load(struct ucred *cred, struct vnode *vp,
1764 struct label *vplabel)
1766 struct mac_lomac *subj, *obj;
1771 subj = SLOT(cred->cr_label);
1772 obj = SLOT(vplabel);
1774 if (lomac_subject_privileged(subj))
1777 if (!lomac_high_single(obj))
1784 lomac_check_pipe_ioctl(struct ucred *cred, struct pipepair *pp,
1785 struct label *pplabel, unsigned long cmd, void /* caddr_t */ *data)
1791 /* XXX: This will be implemented soon... */
1797 lomac_check_pipe_read(struct ucred *cred, struct pipepair *pp,
1798 struct label *pplabel)
1800 struct mac_lomac *subj, *obj;
1805 subj = SLOT(cred->cr_label);
1806 obj = SLOT(pplabel);
1808 if (!lomac_dominate_single(obj, subj))
1809 return (maybe_demote(subj, obj, "reading", "pipe", NULL));
1815 lomac_check_pipe_relabel(struct ucred *cred, struct pipepair *pp,
1816 struct label *pplabel, struct label *newlabel)
1818 struct mac_lomac *subj, *obj, *new;
1821 new = SLOT(newlabel);
1822 subj = SLOT(cred->cr_label);
1823 obj = SLOT(pplabel);
1826 * If there is a LOMAC label update for a pipe, it must be a single
1829 error = lomac_atmostflags(new, MAC_LOMAC_FLAG_SINGLE);
1834 * To perform a relabel of a pipe (LOMAC label or not), LOMAC must
1835 * authorize the relabel.
1837 if (!lomac_single_in_range(obj, subj))
1841 * If the LOMAC label is to be changed, authorize as appropriate.
1843 if (new->ml_flags & MAC_LOMAC_FLAG_SINGLE) {
1845 * To change the LOMAC label on a pipe, the new pipe label
1846 * must be in the subject range.
1848 if (!lomac_single_in_range(new, subj))
1852 * To change the LOMAC label on a pipe to be EQUAL, the
1853 * subject must have appropriate privilege.
1855 if (lomac_contains_equal(new)) {
1856 error = lomac_subject_privileged(subj);
1866 lomac_check_pipe_write(struct ucred *cred, struct pipepair *pp,
1867 struct label *pplabel)
1869 struct mac_lomac *subj, *obj;
1874 subj = SLOT(cred->cr_label);
1875 obj = SLOT(pplabel);
1877 if (!lomac_subject_dominate(subj, obj))
1884 lomac_check_proc_debug(struct ucred *cred, struct proc *p)
1886 struct mac_lomac *subj, *obj;
1891 subj = SLOT(cred->cr_label);
1892 obj = SLOT(p->p_ucred->cr_label);
1894 /* XXX: range checks */
1895 if (!lomac_dominate_single(obj, subj))
1897 if (!lomac_subject_dominate(subj, obj))
1904 lomac_check_proc_sched(struct ucred *cred, struct proc *p)
1906 struct mac_lomac *subj, *obj;
1911 subj = SLOT(cred->cr_label);
1912 obj = SLOT(p->p_ucred->cr_label);
1914 /* XXX: range checks */
1915 if (!lomac_dominate_single(obj, subj))
1917 if (!lomac_subject_dominate(subj, obj))
1924 lomac_check_proc_signal(struct ucred *cred, struct proc *p, int signum)
1926 struct mac_lomac *subj, *obj;
1931 subj = SLOT(cred->cr_label);
1932 obj = SLOT(p->p_ucred->cr_label);
1934 /* XXX: range checks */
1935 if (!lomac_dominate_single(obj, subj))
1937 if (!lomac_subject_dominate(subj, obj))
1944 lomac_check_socket_deliver(struct socket *so, struct label *solabel,
1945 struct mbuf *m, struct label *mlabel)
1947 struct mac_lomac *p, *s;
1955 return (lomac_equal_single(p, s) ? 0 : EACCES);
1959 lomac_check_socket_relabel(struct ucred *cred, struct socket *so,
1960 struct label *solabel, struct label *newlabel)
1962 struct mac_lomac *subj, *obj, *new;
1965 new = SLOT(newlabel);
1966 subj = SLOT(cred->cr_label);
1967 obj = SLOT(solabel);
1970 * If there is a LOMAC label update for the socket, it may be an
1973 error = lomac_atmostflags(new, MAC_LOMAC_FLAG_SINGLE);
1978 * To relabel a socket, the old socket single must be in the subject
1981 if (!lomac_single_in_range(obj, subj))
1985 * If the LOMAC label is to be changed, authorize as appropriate.
1987 if (new->ml_flags & MAC_LOMAC_FLAG_SINGLE) {
1989 * To relabel a socket, the new socket single must be in the
1992 if (!lomac_single_in_range(new, subj))
1996 * To change the LOMAC label on the socket to contain EQUAL,
1997 * the subject must have appropriate privilege.
1999 if (lomac_contains_equal(new)) {
2000 error = lomac_subject_privileged(subj);
2010 lomac_check_socket_visible(struct ucred *cred, struct socket *so,
2011 struct label *solabel)
2013 struct mac_lomac *subj, *obj;
2018 subj = SLOT(cred->cr_label);
2019 obj = SLOT(solabel);
2021 if (!lomac_dominate_single(obj, subj))
2028 * Some system privileges are allowed regardless of integrity grade; others
2029 * are allowed only when running with privilege with respect to the LOMAC
2030 * policy as they might otherwise allow bypassing of the integrity policy.
2033 lomac_priv_check(struct ucred *cred, int priv)
2035 struct mac_lomac *subj;
2042 * Exempt only specific privileges from the LOMAC integrity policy.
2049 * Allow processes to manipulate basic process audit properties, and
2050 * to submit audit records.
2052 case PRIV_AUDIT_GETAUDIT:
2053 case PRIV_AUDIT_SETAUDIT:
2054 case PRIV_AUDIT_SUBMIT:
2057 * Allow processes to manipulate their regular UNIX credentials.
2059 case PRIV_CRED_SETUID:
2060 case PRIV_CRED_SETEUID:
2061 case PRIV_CRED_SETGID:
2062 case PRIV_CRED_SETEGID:
2063 case PRIV_CRED_SETGROUPS:
2064 case PRIV_CRED_SETREUID:
2065 case PRIV_CRED_SETREGID:
2066 case PRIV_CRED_SETRESUID:
2067 case PRIV_CRED_SETRESGID:
2070 * Allow processes to perform system monitoring.
2072 case PRIV_SEEOTHERGIDS:
2073 case PRIV_SEEOTHERUIDS:
2077 * Allow access to general process debugging facilities. We
2078 * separately control debugging based on MAC label.
2080 case PRIV_DEBUG_DIFFCRED:
2081 case PRIV_DEBUG_SUGID:
2082 case PRIV_DEBUG_UNPRIV:
2085 * Allow manipulating jails.
2087 case PRIV_JAIL_ATTACH:
2090 * Allow privilege with respect to the Partition policy, but not the
2093 case PRIV_MAC_PARTITION:
2096 * Allow privilege with respect to process resource limits and login
2099 case PRIV_PROC_LIMIT:
2100 case PRIV_PROC_SETLOGIN:
2101 case PRIV_PROC_SETRLIMIT:
2104 * Allow System V and POSIX IPC privileges.
2107 case PRIV_IPC_WRITE:
2108 case PRIV_IPC_ADMIN:
2109 case PRIV_IPC_MSGSIZE:
2113 * Allow certain scheduler manipulations -- possibly this should be
2114 * controlled by more fine-grained policy, as potentially low
2115 * integrity processes can deny CPU to higher integrity ones.
2117 case PRIV_SCHED_DIFFCRED:
2118 case PRIV_SCHED_SETPRIORITY:
2119 case PRIV_SCHED_RTPRIO:
2120 case PRIV_SCHED_SETPOLICY:
2121 case PRIV_SCHED_SET:
2122 case PRIV_SCHED_SETPARAM:
2125 * More IPC privileges.
2127 case PRIV_SEM_WRITE:
2130 * Allow signaling privileges subject to integrity policy.
2132 case PRIV_SIGNAL_DIFFCRED:
2133 case PRIV_SIGNAL_SUGID:
2136 * Allow access to only limited sysctls from lower integrity levels;
2137 * piggy-back on the Jail definition.
2139 case PRIV_SYSCTL_WRITEJAIL:
2142 * Allow TTY-based privileges, subject to general device access using
2143 * labels on TTY device nodes, but not console privilege.
2145 case PRIV_TTY_DRAINWAIT:
2146 case PRIV_TTY_DTRWAIT:
2147 case PRIV_TTY_EXCLUSIVE:
2148 case PRIV_TTY_PRISON:
2153 * Grant most VFS privileges, as almost all are in practice bounded
2154 * by more specific checks using labels.
2157 case PRIV_VFS_WRITE:
2158 case PRIV_VFS_ADMIN:
2160 case PRIV_VFS_LOOKUP:
2161 case PRIV_VFS_CHFLAGS_DEV:
2162 case PRIV_VFS_CHOWN:
2163 case PRIV_VFS_CHROOT:
2164 case PRIV_VFS_RETAINSUGID:
2165 case PRIV_VFS_EXCEEDQUOTA:
2166 case PRIV_VFS_FCHROOT:
2167 case PRIV_VFS_FHOPEN:
2168 case PRIV_VFS_FHSTATFS:
2169 case PRIV_VFS_GENERATION:
2170 case PRIV_VFS_GETFH:
2171 case PRIV_VFS_GETQUOTA:
2173 case PRIV_VFS_MOUNT:
2174 case PRIV_VFS_MOUNT_OWNER:
2175 case PRIV_VFS_MOUNT_PERM:
2176 case PRIV_VFS_MOUNT_SUIDDIR:
2177 case PRIV_VFS_MOUNT_NONUSER:
2178 case PRIV_VFS_SETGID:
2179 case PRIV_VFS_STICKYFILE:
2180 case PRIV_VFS_SYSFLAGS:
2181 case PRIV_VFS_UNMOUNT:
2184 * Allow VM privileges; it would be nice if these were subject to
2187 case PRIV_VM_MADV_PROTECT:
2189 case PRIV_VM_MUNLOCK:
2192 * Allow some but not all network privileges. In general, dont allow
2193 * reconfiguring the network stack, just normal use.
2195 case PRIV_NETATALK_RESERVEDPORT:
2196 case PRIV_NETINET_RESERVEDPORT:
2197 case PRIV_NETINET_RAW:
2198 case PRIV_NETINET_REUSEPORT:
2199 case PRIV_NETIPX_RESERVEDPORT:
2200 case PRIV_NETIPX_RAW:
2204 * All remaining system privileges are allow only if the process
2205 * holds privilege with respect to the LOMAC policy.
2208 subj = SLOT(cred->cr_label);
2209 error = lomac_subject_privileged(subj);
2218 lomac_check_system_acct(struct ucred *cred, struct vnode *vp,
2219 struct label *vplabel)
2221 struct mac_lomac *subj, *obj;
2226 subj = SLOT(cred->cr_label);
2227 obj = SLOT(vplabel);
2229 if (lomac_subject_privileged(subj))
2232 if (!lomac_high_single(obj))
2239 lomac_check_system_auditctl(struct ucred *cred, struct vnode *vp,
2240 struct label *vplabel)
2242 struct mac_lomac *subj, *obj;
2247 subj = SLOT(cred->cr_label);
2248 obj = SLOT(vplabel);
2250 if (lomac_subject_privileged(subj))
2253 if (!lomac_high_single(obj))
2260 lomac_check_system_swapoff(struct ucred *cred, struct vnode *vp,
2261 struct label *vplabel)
2263 struct mac_lomac *subj;
2268 subj = SLOT(cred->cr_label);
2270 if (lomac_subject_privileged(subj))
2277 lomac_check_system_swapon(struct ucred *cred, struct vnode *vp,
2278 struct label *vplabel)
2280 struct mac_lomac *subj, *obj;
2285 subj = SLOT(cred->cr_label);
2286 obj = SLOT(vplabel);
2288 if (lomac_subject_privileged(subj))
2291 if (!lomac_high_single(obj))
2298 lomac_check_system_sysctl(struct ucred *cred, struct sysctl_oid *oidp,
2299 void *arg1, int arg2, struct sysctl_req *req)
2301 struct mac_lomac *subj;
2306 subj = SLOT(cred->cr_label);
2309 * Treat sysctl variables without CTLFLAG_ANYBODY flag as lomac/high,
2310 * but also require privilege to change them.
2312 if (req->newptr != NULL && (oidp->oid_kind & CTLFLAG_ANYBODY) == 0) {
2314 if (!lomac_subject_dominate_high(subj))
2318 if (lomac_subject_privileged(subj))
2326 lomac_check_vnode_create(struct ucred *cred, struct vnode *dvp,
2327 struct label *dvplabel, struct componentname *cnp, struct vattr *vap)
2329 struct mac_lomac *subj, *obj;
2334 subj = SLOT(cred->cr_label);
2335 obj = SLOT(dvplabel);
2337 if (!lomac_subject_dominate(subj, obj))
2339 if (obj->ml_flags & MAC_LOMAC_FLAG_AUX &&
2340 !lomac_dominate_element(&subj->ml_single, &obj->ml_auxsingle))
2347 lomac_check_vnode_deleteacl(struct ucred *cred, struct vnode *vp,
2348 struct label *vplabel, acl_type_t type)
2350 struct mac_lomac *subj, *obj;
2355 subj = SLOT(cred->cr_label);
2356 obj = SLOT(vplabel);
2358 if (!lomac_subject_dominate(subj, obj))
2365 lomac_check_vnode_link(struct ucred *cred, struct vnode *dvp,
2366 struct label *dvplabel, struct vnode *vp, struct label *vplabel,
2367 struct componentname *cnp)
2369 struct mac_lomac *subj, *obj;
2374 subj = SLOT(cred->cr_label);
2375 obj = SLOT(dvplabel);
2377 if (!lomac_subject_dominate(subj, obj))
2380 obj = SLOT(vplabel);
2382 if (!lomac_subject_dominate(subj, obj))
2389 lomac_check_vnode_mmap(struct ucred *cred, struct vnode *vp,
2390 struct label *vplabel, int prot, int flags)
2392 struct mac_lomac *subj, *obj;
2395 * Rely on the use of open()-time protections to handle
2396 * non-revocation cases.
2401 subj = SLOT(cred->cr_label);
2402 obj = SLOT(vplabel);
2404 if (((prot & VM_PROT_WRITE) != 0) && ((flags & MAP_SHARED) != 0)) {
2405 if (!lomac_subject_dominate(subj, obj))
2408 if (prot & (VM_PROT_READ | VM_PROT_EXECUTE)) {
2409 if (!lomac_dominate_single(obj, subj))
2410 return (maybe_demote(subj, obj, "mapping", "file", vp));
2417 lomac_check_vnode_mmap_downgrade(struct ucred *cred, struct vnode *vp,
2418 struct label *vplabel, /* XXX vm_prot_t */ int *prot)
2420 struct mac_lomac *subj, *obj;
2423 * Rely on the use of open()-time protections to handle
2424 * non-revocation cases.
2426 if (!lomac_enabled || !revocation_enabled)
2429 subj = SLOT(cred->cr_label);
2430 obj = SLOT(vplabel);
2432 if (!lomac_subject_dominate(subj, obj))
2433 *prot &= ~VM_PROT_WRITE;
2437 lomac_check_vnode_open(struct ucred *cred, struct vnode *vp,
2438 struct label *vplabel, int acc_mode)
2440 struct mac_lomac *subj, *obj;
2445 subj = SLOT(cred->cr_label);
2446 obj = SLOT(vplabel);
2448 /* XXX privilege override for admin? */
2449 if (acc_mode & (VWRITE | VAPPEND | VADMIN)) {
2450 if (!lomac_subject_dominate(subj, obj))
2458 lomac_check_vnode_read(struct ucred *active_cred, struct ucred *file_cred,
2459 struct vnode *vp, struct label *vplabel)
2461 struct mac_lomac *subj, *obj;
2463 if (!lomac_enabled || !revocation_enabled)
2466 subj = SLOT(active_cred->cr_label);
2467 obj = SLOT(vplabel);
2469 if (!lomac_dominate_single(obj, subj))
2470 return (maybe_demote(subj, obj, "reading", "file", vp));
2476 lomac_check_vnode_relabel(struct ucred *cred, struct vnode *vp,
2477 struct label *vplabel, struct label *newlabel)
2479 struct mac_lomac *old, *new, *subj;
2482 old = SLOT(vplabel);
2483 new = SLOT(newlabel);
2484 subj = SLOT(cred->cr_label);
2487 * If there is a LOMAC label update for the vnode, it must be a
2488 * single label, with an optional explicit auxiliary single.
2490 error = lomac_atmostflags(new,
2491 MAC_LOMAC_FLAG_SINGLE | MAC_LOMAC_FLAG_AUX);
2496 * To perform a relabel of the vnode (LOMAC label or not), LOMAC must
2497 * authorize the relabel.
2499 if (!lomac_single_in_range(old, subj))
2503 * If the LOMAC label is to be changed, authorize as appropriate.
2505 if (new->ml_flags & MAC_LOMAC_FLAG_SINGLE) {
2507 * To change the LOMAC label on a vnode, the new vnode label
2508 * must be in the subject range.
2510 if (!lomac_single_in_range(new, subj))
2514 * To change the LOMAC label on the vnode to be EQUAL,
2515 * the subject must have appropriate privilege.
2517 if (lomac_contains_equal(new)) {
2518 error = lomac_subject_privileged(subj);
2523 if (new->ml_flags & MAC_LOMAC_FLAG_AUX) {
2525 * Fill in the missing parts from the previous label.
2527 if ((new->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0)
2528 lomac_copy_single(subj, new);
2531 * To change the auxiliary LOMAC label on a vnode, the new
2532 * vnode label must be in the subject range.
2534 if (!lomac_auxsingle_in_range(new, subj))
2538 * To change the auxiliary LOMAC label on the vnode to be
2539 * EQUAL, the subject must have appropriate privilege.
2541 if (lomac_contains_equal(new)) {
2542 error = lomac_subject_privileged(subj);
2552 lomac_check_vnode_rename_from(struct ucred *cred, struct vnode *dvp,
2553 struct label *dvplabel, struct vnode *vp, struct label *vplabel,
2554 struct componentname *cnp)
2556 struct mac_lomac *subj, *obj;
2561 subj = SLOT(cred->cr_label);
2562 obj = SLOT(dvplabel);
2564 if (!lomac_subject_dominate(subj, obj))
2567 obj = SLOT(vplabel);
2569 if (!lomac_subject_dominate(subj, obj))
2576 lomac_check_vnode_rename_to(struct ucred *cred, struct vnode *dvp,
2577 struct label *dvplabel, struct vnode *vp, struct label *vplabel,
2578 int samedir, struct componentname *cnp)
2580 struct mac_lomac *subj, *obj;
2585 subj = SLOT(cred->cr_label);
2586 obj = SLOT(dvplabel);
2588 if (!lomac_subject_dominate(subj, obj))
2592 obj = SLOT(vplabel);
2594 if (!lomac_subject_dominate(subj, obj))
2602 lomac_check_vnode_revoke(struct ucred *cred, struct vnode *vp,
2603 struct label *vplabel)
2605 struct mac_lomac *subj, *obj;
2610 subj = SLOT(cred->cr_label);
2611 obj = SLOT(vplabel);
2613 if (!lomac_subject_dominate(subj, obj))
2620 lomac_check_vnode_setacl(struct ucred *cred, struct vnode *vp,
2621 struct label *vplabel, acl_type_t type, struct acl *acl)
2623 struct mac_lomac *subj, *obj;
2628 subj = SLOT(cred->cr_label);
2629 obj = SLOT(vplabel);
2631 if (!lomac_subject_dominate(subj, obj))
2638 lomac_check_vnode_setextattr(struct ucred *cred, struct vnode *vp,
2639 struct label *vplabel, int attrnamespace, const char *name,
2642 struct mac_lomac *subj, *obj;
2647 subj = SLOT(cred->cr_label);
2648 obj = SLOT(vplabel);
2650 if (!lomac_subject_dominate(subj, obj))
2653 /* XXX: protect the MAC EA in a special way? */
2659 lomac_check_vnode_setflags(struct ucred *cred, struct vnode *vp,
2660 struct label *vplabel, u_long flags)
2662 struct mac_lomac *subj, *obj;
2667 subj = SLOT(cred->cr_label);
2668 obj = SLOT(vplabel);
2670 if (!lomac_subject_dominate(subj, obj))
2677 lomac_check_vnode_setmode(struct ucred *cred, struct vnode *vp,
2678 struct label *vplabel, mode_t mode)
2680 struct mac_lomac *subj, *obj;
2685 subj = SLOT(cred->cr_label);
2686 obj = SLOT(vplabel);
2688 if (!lomac_subject_dominate(subj, obj))
2695 lomac_check_vnode_setowner(struct ucred *cred, struct vnode *vp,
2696 struct label *vplabel, uid_t uid, gid_t gid)
2698 struct mac_lomac *subj, *obj;
2703 subj = SLOT(cred->cr_label);
2704 obj = SLOT(vplabel);
2706 if (!lomac_subject_dominate(subj, obj))
2713 lomac_check_vnode_setutimes(struct ucred *cred, struct vnode *vp,
2714 struct label *vplabel, struct timespec atime, struct timespec mtime)
2716 struct mac_lomac *subj, *obj;
2721 subj = SLOT(cred->cr_label);
2722 obj = SLOT(vplabel);
2724 if (!lomac_subject_dominate(subj, obj))
2731 lomac_check_vnode_unlink(struct ucred *cred, struct vnode *dvp,
2732 struct label *dvplabel, struct vnode *vp, struct label *vplabel,
2733 struct componentname *cnp)
2735 struct mac_lomac *subj, *obj;
2740 subj = SLOT(cred->cr_label);
2741 obj = SLOT(dvplabel);
2743 if (!lomac_subject_dominate(subj, obj))
2746 obj = SLOT(vplabel);
2748 if (!lomac_subject_dominate(subj, obj))
2755 lomac_check_vnode_write(struct ucred *active_cred,
2756 struct ucred *file_cred, struct vnode *vp, struct label *vplabel)
2758 struct mac_lomac *subj, *obj;
2760 if (!lomac_enabled || !revocation_enabled)
2763 subj = SLOT(active_cred->cr_label);
2764 obj = SLOT(vplabel);
2766 if (!lomac_subject_dominate(subj, obj))
2773 lomac_thread_userret(struct thread *td)
2775 struct proc *p = td->td_proc;
2776 struct mac_lomac_proc *subj = PSLOT(p->p_label);
2777 struct ucred *newcred, *oldcred;
2780 mtx_lock(&subj->mtx);
2781 if (subj->mac_lomac.ml_flags & MAC_LOMAC_FLAG_UPDATE) {
2783 mtx_unlock(&subj->mtx);
2786 * Prevent a lock order reversal in
2787 * mac_cred_mmapped_drop_perms; ideally, the other
2788 * user of subj->mtx wouldn't be holding Giant.
2792 mtx_lock(&subj->mtx);
2794 * Check if we lost the race while allocating the cred.
2796 if ((subj->mac_lomac.ml_flags & MAC_LOMAC_FLAG_UPDATE) == 0) {
2800 oldcred = p->p_ucred;
2801 crcopy(newcred, oldcred);
2803 lomac_copy(&subj->mac_lomac, SLOT(newcred->cr_label));
2804 p->p_ucred = newcred;
2808 mtx_unlock(&subj->mtx);
2811 mac_cred_mmapped_drop_perms(curthread, newcred);
2814 mtx_unlock(&subj->mtx);
2818 static struct mac_policy_ops lomac_ops =
2820 .mpo_init = lomac_init,
2821 .mpo_init_bpfdesc_label = lomac_init_label,
2822 .mpo_init_cred_label = lomac_init_label,
2823 .mpo_init_devfs_label = lomac_init_label,
2824 .mpo_init_ifnet_label = lomac_init_label,
2825 .mpo_init_syncache_label = lomac_init_label_waitcheck,
2826 .mpo_init_inpcb_label = lomac_init_label_waitcheck,
2827 .mpo_init_ipq_label = lomac_init_label_waitcheck,
2828 .mpo_init_mbuf_label = lomac_init_label_waitcheck,
2829 .mpo_init_mount_label = lomac_init_label,
2830 .mpo_init_pipe_label = lomac_init_label,
2831 .mpo_init_proc_label = lomac_init_proc_label,
2832 .mpo_init_socket_label = lomac_init_label_waitcheck,
2833 .mpo_init_socket_peer_label = lomac_init_label_waitcheck,
2834 .mpo_init_vnode_label = lomac_init_label,
2835 .mpo_init_syncache_from_inpcb = lomac_init_syncache_from_inpcb,
2836 .mpo_destroy_bpfdesc_label = lomac_destroy_label,
2837 .mpo_destroy_cred_label = lomac_destroy_label,
2838 .mpo_destroy_devfs_label = lomac_destroy_label,
2839 .mpo_destroy_ifnet_label = lomac_destroy_label,
2840 .mpo_destroy_inpcb_label = lomac_destroy_label,
2841 .mpo_destroy_ipq_label = lomac_destroy_label,
2842 .mpo_destroy_mbuf_label = lomac_destroy_label,
2843 .mpo_destroy_mount_label = lomac_destroy_label,
2844 .mpo_destroy_pipe_label = lomac_destroy_label,
2845 .mpo_destroy_proc_label = lomac_destroy_proc_label,
2846 .mpo_destroy_syncache_label = lomac_destroy_label,
2847 .mpo_destroy_socket_label = lomac_destroy_label,
2848 .mpo_destroy_socket_peer_label = lomac_destroy_label,
2849 .mpo_destroy_vnode_label = lomac_destroy_label,
2850 .mpo_copy_cred_label = lomac_copy_label,
2851 .mpo_copy_ifnet_label = lomac_copy_label,
2852 .mpo_copy_mbuf_label = lomac_copy_label,
2853 .mpo_copy_pipe_label = lomac_copy_label,
2854 .mpo_copy_socket_label = lomac_copy_label,
2855 .mpo_copy_vnode_label = lomac_copy_label,
2856 .mpo_externalize_cred_label = lomac_externalize_label,
2857 .mpo_externalize_ifnet_label = lomac_externalize_label,
2858 .mpo_externalize_pipe_label = lomac_externalize_label,
2859 .mpo_externalize_socket_label = lomac_externalize_label,
2860 .mpo_externalize_socket_peer_label = lomac_externalize_label,
2861 .mpo_externalize_vnode_label = lomac_externalize_label,
2862 .mpo_internalize_cred_label = lomac_internalize_label,
2863 .mpo_internalize_ifnet_label = lomac_internalize_label,
2864 .mpo_internalize_pipe_label = lomac_internalize_label,
2865 .mpo_internalize_socket_label = lomac_internalize_label,
2866 .mpo_internalize_vnode_label = lomac_internalize_label,
2867 .mpo_create_devfs_device = lomac_create_devfs_device,
2868 .mpo_create_devfs_directory = lomac_create_devfs_directory,
2869 .mpo_create_devfs_symlink = lomac_create_devfs_symlink,
2870 .mpo_create_mount = lomac_create_mount,
2871 .mpo_relabel_vnode = lomac_relabel_vnode,
2872 .mpo_update_devfs = lomac_update_devfs,
2873 .mpo_associate_vnode_devfs = lomac_associate_vnode_devfs,
2874 .mpo_associate_vnode_extattr = lomac_associate_vnode_extattr,
2875 .mpo_associate_vnode_singlelabel = lomac_associate_vnode_singlelabel,
2876 .mpo_create_vnode_extattr = lomac_create_vnode_extattr,
2877 .mpo_setlabel_vnode_extattr = lomac_setlabel_vnode_extattr,
2878 .mpo_create_mbuf_from_socket = lomac_create_mbuf_from_socket,
2879 .mpo_create_mbuf_from_syncache = lomac_create_mbuf_from_syncache,
2880 .mpo_create_pipe = lomac_create_pipe,
2881 .mpo_create_socket = lomac_create_socket,
2882 .mpo_create_socket_from_socket = lomac_create_socket_from_socket,
2883 .mpo_relabel_pipe = lomac_relabel_pipe,
2884 .mpo_relabel_socket = lomac_relabel_socket,
2885 .mpo_set_socket_peer_from_mbuf = lomac_set_socket_peer_from_mbuf,
2886 .mpo_set_socket_peer_from_socket = lomac_set_socket_peer_from_socket,
2887 .mpo_create_bpfdesc = lomac_create_bpfdesc,
2888 .mpo_create_datagram_from_ipq = lomac_create_datagram_from_ipq,
2889 .mpo_create_fragment = lomac_create_fragment,
2890 .mpo_create_ifnet = lomac_create_ifnet,
2891 .mpo_create_inpcb_from_socket = lomac_create_inpcb_from_socket,
2892 .mpo_create_ipq = lomac_create_ipq,
2893 .mpo_create_mbuf_from_inpcb = lomac_create_mbuf_from_inpcb,
2894 .mpo_create_mbuf_linklayer = lomac_create_mbuf_linklayer,
2895 .mpo_create_mbuf_from_bpfdesc = lomac_create_mbuf_from_bpfdesc,
2896 .mpo_create_mbuf_from_ifnet = lomac_create_mbuf_from_ifnet,
2897 .mpo_create_mbuf_multicast_encap = lomac_create_mbuf_multicast_encap,
2898 .mpo_create_mbuf_netlayer = lomac_create_mbuf_netlayer,
2899 .mpo_fragment_match = lomac_fragment_match,
2900 .mpo_relabel_ifnet = lomac_relabel_ifnet,
2901 .mpo_update_ipq = lomac_update_ipq,
2902 .mpo_inpcb_sosetlabel = lomac_inpcb_sosetlabel,
2903 .mpo_execve_transition = lomac_execve_transition,
2904 .mpo_execve_will_transition = lomac_execve_will_transition,
2905 .mpo_create_proc0 = lomac_create_proc0,
2906 .mpo_create_proc1 = lomac_create_proc1,
2907 .mpo_relabel_cred = lomac_relabel_cred,
2908 .mpo_check_bpfdesc_receive = lomac_check_bpfdesc_receive,
2909 .mpo_check_cred_relabel = lomac_check_cred_relabel,
2910 .mpo_check_cred_visible = lomac_check_cred_visible,
2911 .mpo_check_ifnet_relabel = lomac_check_ifnet_relabel,
2912 .mpo_check_ifnet_transmit = lomac_check_ifnet_transmit,
2913 .mpo_check_inpcb_deliver = lomac_check_inpcb_deliver,
2914 .mpo_check_inpcb_visible = lomac_check_inpcb_visible,
2915 .mpo_check_kld_load = lomac_check_kld_load,
2916 .mpo_check_pipe_ioctl = lomac_check_pipe_ioctl,
2917 .mpo_check_pipe_read = lomac_check_pipe_read,
2918 .mpo_check_pipe_relabel = lomac_check_pipe_relabel,
2919 .mpo_check_pipe_write = lomac_check_pipe_write,
2920 .mpo_check_proc_debug = lomac_check_proc_debug,
2921 .mpo_check_proc_sched = lomac_check_proc_sched,
2922 .mpo_check_proc_signal = lomac_check_proc_signal,
2923 .mpo_check_socket_deliver = lomac_check_socket_deliver,
2924 .mpo_check_socket_relabel = lomac_check_socket_relabel,
2925 .mpo_check_socket_visible = lomac_check_socket_visible,
2926 .mpo_check_system_acct = lomac_check_system_acct,
2927 .mpo_check_system_auditctl = lomac_check_system_auditctl,
2928 .mpo_check_system_swapoff = lomac_check_system_swapoff,
2929 .mpo_check_system_swapon = lomac_check_system_swapon,
2930 .mpo_check_system_sysctl = lomac_check_system_sysctl,
2931 .mpo_check_vnode_access = lomac_check_vnode_open,
2932 .mpo_check_vnode_create = lomac_check_vnode_create,
2933 .mpo_check_vnode_deleteacl = lomac_check_vnode_deleteacl,
2934 .mpo_check_vnode_link = lomac_check_vnode_link,
2935 .mpo_check_vnode_mmap = lomac_check_vnode_mmap,
2936 .mpo_check_vnode_mmap_downgrade = lomac_check_vnode_mmap_downgrade,
2937 .mpo_check_vnode_open = lomac_check_vnode_open,
2938 .mpo_check_vnode_read = lomac_check_vnode_read,
2939 .mpo_check_vnode_relabel = lomac_check_vnode_relabel,
2940 .mpo_check_vnode_rename_from = lomac_check_vnode_rename_from,
2941 .mpo_check_vnode_rename_to = lomac_check_vnode_rename_to,
2942 .mpo_check_vnode_revoke = lomac_check_vnode_revoke,
2943 .mpo_check_vnode_setacl = lomac_check_vnode_setacl,
2944 .mpo_check_vnode_setextattr = lomac_check_vnode_setextattr,
2945 .mpo_check_vnode_setflags = lomac_check_vnode_setflags,
2946 .mpo_check_vnode_setmode = lomac_check_vnode_setmode,
2947 .mpo_check_vnode_setowner = lomac_check_vnode_setowner,
2948 .mpo_check_vnode_setutimes = lomac_check_vnode_setutimes,
2949 .mpo_check_vnode_unlink = lomac_check_vnode_unlink,
2950 .mpo_check_vnode_write = lomac_check_vnode_write,
2951 .mpo_thread_userret = lomac_thread_userret,
2952 .mpo_create_mbuf_from_firewall = lomac_create_mbuf_from_firewall,
2953 .mpo_priv_check = lomac_priv_check,
2956 MAC_POLICY_SET(&lomac_ops, mac_lomac, "TrustedBSD MAC/LOMAC",
2957 MPC_LOADTIME_FLAG_NOTLATE | MPC_LOADTIME_FLAG_LABELMBUFS, &lomac_slot);