2 * Copyright (c) 2003-2005 SPARTA, Inc.
5 * This software was developed for the FreeBSD Project in part by Network
6 * Associates Laboratories, the Security Research Division of Network
7 * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"),
8 * as part of the DARPA CHATS research program.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD$");
36 #include "opt_posix.h"
38 #include <sys/param.h>
39 #include <sys/kernel.h>
40 #include <sys/malloc.h>
42 #include <sys/module.h>
43 #include <sys/systm.h>
44 #include <sys/sysctl.h>
46 #include <posix4/ksem.h>
48 #include <sys/mac_policy.h>
50 #include <security/mac/mac_internal.h>
52 static int mac_enforce_posix_sem = 1;
53 SYSCTL_INT(_security_mac, OID_AUTO, enforce_posix_sem, CTLFLAG_RW,
54 &mac_enforce_posix_sem, 0, "Enforce MAC policy on global POSIX semaphores");
55 TUNABLE_INT("security.mac.enforce_posix_sem", &mac_enforce_posix_sem);
58 static unsigned int nmacposixsems;
59 SYSCTL_UINT(_security_mac_debug_counters, OID_AUTO, posix_sems, CTLFLAG_RD,
60 &nmacposixsems, 0, "number of posix global semaphores inuse");
64 mac_posix_sem_label_alloc(void)
68 label = mac_labelzone_alloc(M_WAITOK);
69 MAC_PERFORM(init_posix_sem_label, label);
70 MAC_DEBUG_COUNTER_INC(&nmacposixsems);
75 mac_init_posix_sem(struct ksem *ksemptr)
78 ksemptr->ks_label = mac_posix_sem_label_alloc();
82 mac_posix_sem_label_free(struct label *label)
85 MAC_PERFORM(destroy_posix_sem_label, label);
86 MAC_DEBUG_COUNTER_DEC(&nmacposixsems);
90 mac_destroy_posix_sem(struct ksem *ksemptr)
93 mac_posix_sem_label_free(ksemptr->ks_label);
94 ksemptr->ks_label = NULL;
98 mac_create_posix_sem(struct ucred *cred, struct ksem *ksemptr)
101 MAC_PERFORM(create_posix_sem, cred, ksemptr, ksemptr->ks_label);
105 mac_check_posix_sem_destroy(struct ucred *cred, struct ksem *ksemptr)
109 if (!mac_enforce_posix_sem)
112 MAC_CHECK(check_posix_sem_destroy, cred, ksemptr, ksemptr->ks_label);
118 mac_check_posix_sem_open(struct ucred *cred, struct ksem *ksemptr)
122 if (!mac_enforce_posix_sem)
125 MAC_CHECK(check_posix_sem_open, cred, ksemptr, ksemptr->ks_label);
131 mac_check_posix_sem_getvalue(struct ucred *cred, struct ksem *ksemptr)
135 if (!mac_enforce_posix_sem)
138 MAC_CHECK(check_posix_sem_getvalue, cred, ksemptr,
145 mac_check_posix_sem_post(struct ucred *cred, struct ksem *ksemptr)
149 if (!mac_enforce_posix_sem)
152 MAC_CHECK(check_posix_sem_post, cred, ksemptr, ksemptr->ks_label);
158 mac_check_posix_sem_unlink(struct ucred *cred, struct ksem *ksemptr)
162 if (!mac_enforce_posix_sem)
165 MAC_CHECK(check_posix_sem_unlink, cred, ksemptr, ksemptr->ks_label);
171 mac_check_posix_sem_wait(struct ucred *cred, struct ksem *ksemptr)
175 if (!mac_enforce_posix_sem)
178 MAC_CHECK(check_posix_sem_wait, cred, ksemptr, ksemptr->ks_label);