5cab05d889
other problems while labels were first being added to various kernel objects. They have outlived their usefulness. MFC after: 1 month Suggested by: Christopher dot Vance at SPARTA dot com Obtained from: TrustedBSD Project
174 lines
4.1 KiB
C
174 lines
4.1 KiB
C
/*-
|
|
* Copyright (c) 2003-2005 SPARTA, 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("$FreeBSD$");
|
|
|
|
#include "opt_mac.h"
|
|
#include "opt_posix.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/mac.h>
|
|
#include <sys/module.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/sysctl.h>
|
|
|
|
#include <posix4/ksem.h>
|
|
|
|
#include <sys/mac_policy.h>
|
|
|
|
#include <security/mac/mac_internal.h>
|
|
|
|
static int mac_enforce_posix_sem = 1;
|
|
SYSCTL_INT(_security_mac, OID_AUTO, enforce_posix_sem, CTLFLAG_RW,
|
|
&mac_enforce_posix_sem, 0, "Enforce MAC policy on global POSIX semaphores");
|
|
TUNABLE_INT("security.mac.enforce_posix_sem", &mac_enforce_posix_sem);
|
|
|
|
static struct label *
|
|
mac_posix_sem_label_alloc(void)
|
|
{
|
|
struct label *label;
|
|
|
|
label = mac_labelzone_alloc(M_WAITOK);
|
|
MAC_PERFORM(init_posix_sem_label, label);
|
|
return (label);
|
|
}
|
|
|
|
void
|
|
mac_init_posix_sem(struct ksem *ksemptr)
|
|
{
|
|
|
|
ksemptr->ks_label = mac_posix_sem_label_alloc();
|
|
}
|
|
|
|
static void
|
|
mac_posix_sem_label_free(struct label *label)
|
|
{
|
|
|
|
MAC_PERFORM(destroy_posix_sem_label, label);
|
|
}
|
|
|
|
void
|
|
mac_destroy_posix_sem(struct ksem *ksemptr)
|
|
{
|
|
|
|
mac_posix_sem_label_free(ksemptr->ks_label);
|
|
ksemptr->ks_label = NULL;
|
|
}
|
|
|
|
void
|
|
mac_create_posix_sem(struct ucred *cred, struct ksem *ksemptr)
|
|
{
|
|
|
|
MAC_PERFORM(create_posix_sem, cred, ksemptr, ksemptr->ks_label);
|
|
}
|
|
|
|
int
|
|
mac_check_posix_sem_destroy(struct ucred *cred, struct ksem *ksemptr)
|
|
{
|
|
int error;
|
|
|
|
if (!mac_enforce_posix_sem)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_posix_sem_destroy, cred, ksemptr, ksemptr->ks_label);
|
|
|
|
return(error);
|
|
}
|
|
|
|
int
|
|
mac_check_posix_sem_open(struct ucred *cred, struct ksem *ksemptr)
|
|
{
|
|
int error;
|
|
|
|
if (!mac_enforce_posix_sem)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_posix_sem_open, cred, ksemptr, ksemptr->ks_label);
|
|
|
|
return(error);
|
|
}
|
|
|
|
int
|
|
mac_check_posix_sem_getvalue(struct ucred *cred, struct ksem *ksemptr)
|
|
{
|
|
int error;
|
|
|
|
if (!mac_enforce_posix_sem)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_posix_sem_getvalue, cred, ksemptr,
|
|
ksemptr->ks_label);
|
|
|
|
return(error);
|
|
}
|
|
|
|
int
|
|
mac_check_posix_sem_post(struct ucred *cred, struct ksem *ksemptr)
|
|
{
|
|
int error;
|
|
|
|
if (!mac_enforce_posix_sem)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_posix_sem_post, cred, ksemptr, ksemptr->ks_label);
|
|
|
|
return(error);
|
|
}
|
|
|
|
int
|
|
mac_check_posix_sem_unlink(struct ucred *cred, struct ksem *ksemptr)
|
|
{
|
|
int error;
|
|
|
|
if (!mac_enforce_posix_sem)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_posix_sem_unlink, cred, ksemptr, ksemptr->ks_label);
|
|
|
|
return(error);
|
|
}
|
|
|
|
int
|
|
mac_check_posix_sem_wait(struct ucred *cred, struct ksem *ksemptr)
|
|
{
|
|
int error;
|
|
|
|
if (!mac_enforce_posix_sem)
|
|
return (0);
|
|
|
|
MAC_CHECK(check_posix_sem_wait, cred, ksemptr, ksemptr->ks_label);
|
|
|
|
return(error);
|
|
}
|