2 * Copyright (c) 2003-2004 Networks Associates Technology, 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("$FreeBSD$");
37 #include <sys/param.h>
38 #include <sys/kernel.h>
40 #include <sys/malloc.h>
41 #include <sys/mutex.h>
44 #include <sys/systm.h>
45 #include <sys/vnode.h>
46 #include <sys/mount.h>
48 #include <sys/namei.h>
49 #include <sys/sysctl.h>
52 #include <sys/mac_policy.h>
54 #include <security/mac/mac_internal.h>
56 static int mac_enforce_sysv_sem = 1;
57 SYSCTL_INT(_security_mac, OID_AUTO, enforce_sysv_sem, CTLFLAG_RW,
58 &mac_enforce_sysv_sem, 0, "Enforce MAC policy on System V IPC Semaphores");
59 TUNABLE_INT("security.mac.enforce_sysv", &mac_enforce_sysv_sem);
62 static unsigned int nmacipcsemas;
63 SYSCTL_UINT(_security_mac_debug_counters, OID_AUTO, ipc_semas, CTLFLAG_RD,
64 &nmacipcsemas, 0, "number of sysv ipc semaphore identifiers inuse");
68 mac_sysv_sem_label_alloc(void)
72 label = mac_labelzone_alloc(M_WAITOK);
73 MAC_PERFORM(init_sysv_sem_label, label);
74 MAC_DEBUG_COUNTER_INC(&nmacipcsemas);
79 mac_init_sysv_sem(struct semid_kernel *semakptr)
82 semakptr->label = mac_sysv_sem_label_alloc();
86 mac_sysv_sem_label_free(struct label *label)
89 MAC_PERFORM(destroy_sysv_sem_label, label);
90 mac_labelzone_free(label);
91 MAC_DEBUG_COUNTER_DEC(&nmacipcsemas);
95 mac_destroy_sysv_sem(struct semid_kernel *semakptr)
98 mac_sysv_sem_label_free(semakptr->label);
99 semakptr->label = NULL;
103 mac_create_sysv_sem(struct ucred *cred, struct semid_kernel *semakptr)
106 MAC_PERFORM(create_sysv_sem, cred, semakptr, semakptr->label);
110 mac_cleanup_sysv_sem(struct semid_kernel *semakptr)
113 MAC_PERFORM(cleanup_sysv_sem, semakptr->label);
117 mac_check_sysv_semctl(struct ucred *cred, struct semid_kernel *semakptr,
122 if (!mac_enforce_sysv_sem)
125 MAC_CHECK(check_sysv_semctl, cred, semakptr, semakptr->label, cmd);
131 mac_check_sysv_semget(struct ucred *cred, struct semid_kernel *semakptr)
135 if (!mac_enforce_sysv_sem)
138 MAC_CHECK(check_sysv_semget, cred, semakptr, semakptr->label);
144 mac_check_sysv_semop(struct ucred *cred, struct semid_kernel *semakptr,
149 if (!mac_enforce_sysv_sem)
152 MAC_CHECK(check_sysv_semop, cred, semakptr, semakptr->label,