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/*-
* Copyright (c) 2003-2004 Networks Associates Technology, Inc.
* All rights reserved.
*
* This software was developed for the FreeBSD Project in part by Network
* Associates Laboratories, the Security Research Division of Network
* Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"),
* as part of the DARPA CHATS research program.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/sys/security/mac/mac_sysv_shm.c,v 1.1 2004/11/17 13:14:24 rwatson Exp $");
#include "opt_mac.h"
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mutex.h>
#include <sys/mac.h>
#include <sys/sbuf.h>
#include <sys/systm.h>
#include <sys/vnode.h>
#include <sys/mount.h>
#include <sys/file.h>
#include <sys/namei.h>
#include <sys/sysctl.h>
#include <sys/shm.h>
#include <sys/mac_policy.h>
#include <security/mac/mac_internal.h>
static int mac_enforce_sysv_shm = 1;
SYSCTL_INT(_security_mac, OID_AUTO, enforce_sysv_shm, CTLFLAG_RW,
&mac_enforce_sysv_shm, 0,
"Enforce MAC policy on System V IPC shared memory");
TUNABLE_INT("security.mac.enforce_sysv", &mac_enforce_sysv_shm);
#ifdef MAC_DEBUG
static unsigned int nmacipcshms;
SYSCTL_UINT(_security_mac_debug_counters, OID_AUTO, ipc_shms, CTLFLAG_RD,
&nmacipcshms, 0, "number of sysv ipc shm identifiers inuse");
#endif
static struct label *
mac_sysv_shm_label_alloc(void)
{
struct label *label;
label = mac_labelzone_alloc(M_WAITOK);
MAC_PERFORM(init_sysv_shm_label, label);
MAC_DEBUG_COUNTER_INC(&nmacipcshms);
return (label);
}
void
mac_init_sysv_shm(struct shmid_kernel *shmsegptr)
{
shmsegptr->label = mac_sysv_shm_label_alloc();
}
static void
mac_sysv_shm_label_free(struct label *label)
{
MAC_PERFORM(destroy_sysv_shm_label, label);
mac_labelzone_free(label);
MAC_DEBUG_COUNTER_DEC(&nmacipcshms);
}
void
mac_destroy_sysv_shm(struct shmid_kernel *shmsegptr)
{
mac_sysv_shm_label_free(shmsegptr->label);
shmsegptr->label = NULL;
}
void
mac_create_sysv_shm(struct ucred *cred, struct shmid_kernel *shmsegptr)
{
MAC_PERFORM(create_sysv_shm, cred, shmsegptr, shmsegptr->label);
}
void
mac_cleanup_sysv_shm(struct shmid_kernel *shmsegptr)
{
MAC_PERFORM(cleanup_sysv_shm, shmsegptr->label);
}
int
mac_check_sysv_shmat(struct ucred *cred, struct shmid_kernel *shmsegptr,
int shmflg)
{
int error;
if (!mac_enforce_sysv_shm)
return (0);
MAC_CHECK(check_sysv_shmat, cred, shmsegptr, shmsegptr->label,
shmflg);
return(error);
}
int
mac_check_sysv_shmctl(struct ucred *cred, struct shmid_kernel *shmsegptr,
int cmd)
{
int error;
if (!mac_enforce_sysv_shm)
return (0);
MAC_CHECK(check_sysv_shmctl, cred, shmsegptr, shmsegptr->label,
cmd);
return(error);
}
int
mac_check_sysv_shmdt(struct ucred *cred, struct shmid_kernel *shmsegptr)
{
int error;
if (!mac_enforce_sysv_shm)
return (0);
MAC_CHECK(check_sysv_shmdt, cred, shmsegptr, shmsegptr->label);
return(error);
}
int
mac_check_sysv_shmget(struct ucred *cred, struct shmid_kernel *shmsegptr,
int shmflg)
{
int error;
if (!mac_enforce_sysv_shm)
return (0);
MAC_CHECK(check_sysv_shmget, cred, shmsegptr, shmsegptr->label,
shmflg);
return(error);
}
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