174 lines
4.2 KiB
C
174 lines
4.2 KiB
C
/*-
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* Copyright (c) 2003-2005 SPARTA, Inc.
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* All rights reserved.
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*
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* This software was developed for the FreeBSD Project in part by Network
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* Associates Laboratories, the Security Research Division of Network
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* Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"),
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* as part of the DARPA CHATS research program.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_mac.h"
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#include "opt_posix.h"
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/ksem.h>
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#include <sys/malloc.h>
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#include <sys/mac.h>
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#include <sys/module.h>
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#include <sys/systm.h>
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#include <sys/sysctl.h>
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#include <sys/mac_policy.h>
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#include <security/mac/mac_framework.h>
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#include <security/mac/mac_internal.h>
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static int mac_enforce_posix_sem = 1;
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SYSCTL_INT(_security_mac, OID_AUTO, enforce_posix_sem, CTLFLAG_RW,
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&mac_enforce_posix_sem, 0, "Enforce MAC policy on global POSIX semaphores");
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TUNABLE_INT("security.mac.enforce_posix_sem", &mac_enforce_posix_sem);
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static struct label *
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mac_posix_sem_label_alloc(void)
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{
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struct label *label;
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label = mac_labelzone_alloc(M_WAITOK);
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MAC_PERFORM(init_posix_sem_label, label);
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return (label);
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}
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void
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mac_init_posix_sem(struct ksem *ksemptr)
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{
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ksemptr->ks_label = mac_posix_sem_label_alloc();
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}
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static void
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mac_posix_sem_label_free(struct label *label)
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{
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MAC_PERFORM(destroy_posix_sem_label, label);
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}
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void
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mac_destroy_posix_sem(struct ksem *ksemptr)
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{
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mac_posix_sem_label_free(ksemptr->ks_label);
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ksemptr->ks_label = NULL;
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}
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void
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mac_create_posix_sem(struct ucred *cred, struct ksem *ksemptr)
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{
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MAC_PERFORM(create_posix_sem, cred, ksemptr, ksemptr->ks_label);
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}
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int
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mac_check_posix_sem_destroy(struct ucred *cred, struct ksem *ksemptr)
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{
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int error;
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if (!mac_enforce_posix_sem)
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return (0);
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MAC_CHECK(check_posix_sem_destroy, cred, ksemptr, ksemptr->ks_label);
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return(error);
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}
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int
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mac_check_posix_sem_open(struct ucred *cred, struct ksem *ksemptr)
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{
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int error;
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if (!mac_enforce_posix_sem)
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return (0);
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MAC_CHECK(check_posix_sem_open, cred, ksemptr, ksemptr->ks_label);
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return(error);
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}
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int
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mac_check_posix_sem_getvalue(struct ucred *cred, struct ksem *ksemptr)
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{
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int error;
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if (!mac_enforce_posix_sem)
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return (0);
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MAC_CHECK(check_posix_sem_getvalue, cred, ksemptr,
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ksemptr->ks_label);
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return(error);
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}
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int
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mac_check_posix_sem_post(struct ucred *cred, struct ksem *ksemptr)
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{
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int error;
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if (!mac_enforce_posix_sem)
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return (0);
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MAC_CHECK(check_posix_sem_post, cred, ksemptr, ksemptr->ks_label);
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return(error);
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}
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int
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mac_check_posix_sem_unlink(struct ucred *cred, struct ksem *ksemptr)
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{
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int error;
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if (!mac_enforce_posix_sem)
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return (0);
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MAC_CHECK(check_posix_sem_unlink, cred, ksemptr, ksemptr->ks_label);
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return(error);
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}
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int
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mac_check_posix_sem_wait(struct ucred *cred, struct ksem *ksemptr)
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{
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int error;
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if (!mac_enforce_posix_sem)
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return (0);
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MAC_CHECK(check_posix_sem_wait, cred, ksemptr, ksemptr->ks_label);
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return(error);
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}
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