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- /*-
- * Copyright (c) 2003-2004 Networks Associates Technology, Inc.
- * Copyright (c) 2006 SPARTA, Inc.
- * Copyright (c) 2009 Robert N. M. Watson
- * 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.
- *
- * This software was enhanced by SPARTA ISSO under SPAWAR contract
- * N66001-04-C-6019 ("SEFOS").
- *
- * This software was developed at the University of Cambridge Computer
- * Laboratory with support from a grant from Google, Inc.
- *
- * 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>
- #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/sbuf.h>
- #include <sys/systm.h>
- #include <sys/vnode.h>
- #include <sys/mount.h>
- #include <sys/file.h>
- #include <sys/namei.h>
- #include <sys/sdt.h>
- #include <sys/sysctl.h>
- #include <sys/shm.h>
- #include <security/mac/mac_framework.h>
- #include <security/mac/mac_internal.h>
- #include <security/mac/mac_policy.h>
- static struct label *
- mac_sysv_shm_label_alloc(void)
- {
- struct label *label;
- label = mac_labelzone_alloc(M_WAITOK);
- MAC_POLICY_PERFORM(sysvshm_init_label, label);
- return (label);
- }
- void
- mac_sysvshm_init(struct shmid_kernel *shmsegptr)
- {
- if (mac_labeled & MPC_OBJECT_SYSVSHM)
- shmsegptr->label = mac_sysv_shm_label_alloc();
- else
- shmsegptr->label = NULL;
- }
- static void
- mac_sysv_shm_label_free(struct label *label)
- {
- MAC_POLICY_PERFORM_NOSLEEP(sysvshm_destroy_label, label);
- mac_labelzone_free(label);
- }
- void
- mac_sysvshm_destroy(struct shmid_kernel *shmsegptr)
- {
- if (shmsegptr->label != NULL) {
- mac_sysv_shm_label_free(shmsegptr->label);
- shmsegptr->label = NULL;
- }
- }
- void
- mac_sysvshm_create(struct ucred *cred, struct shmid_kernel *shmsegptr)
- {
- MAC_POLICY_PERFORM_NOSLEEP(sysvshm_create, cred, shmsegptr,
- shmsegptr->label);
- }
- void
- mac_sysvshm_cleanup(struct shmid_kernel *shmsegptr)
- {
- MAC_POLICY_PERFORM_NOSLEEP(sysvshm_cleanup, shmsegptr->label);
- }
- MAC_CHECK_PROBE_DEFINE3(sysvshm_check_shmat, "struct ucred *",
- "struct shmid_kernel *", "int");
- int
- mac_sysvshm_check_shmat(struct ucred *cred, struct shmid_kernel *shmsegptr,
- int shmflg)
- {
- int error;
- MAC_POLICY_CHECK_NOSLEEP(sysvshm_check_shmat, cred, shmsegptr,
- shmsegptr->label, shmflg);
- MAC_CHECK_PROBE3(sysvshm_check_shmat, error, cred, shmsegptr,
- shmflg);
- return (error);
- }
- MAC_CHECK_PROBE_DEFINE3(sysvshm_check_shmctl, "struct ucred *",
- "struct shmid_kernel *", "int");
- int
- mac_sysvshm_check_shmctl(struct ucred *cred, struct shmid_kernel *shmsegptr,
- int cmd)
- {
- int error;
- MAC_POLICY_CHECK_NOSLEEP(sysvshm_check_shmctl, cred, shmsegptr,
- shmsegptr->label, cmd);
- MAC_CHECK_PROBE3(sysvshm_check_shmctl, error, cred, shmsegptr, cmd);
- return (error);
- }
- MAC_CHECK_PROBE_DEFINE2(sysvshm_check_shmdt, "struct ucred *",
- "struct shmid *");
- int
- mac_sysvshm_check_shmdt(struct ucred *cred, struct shmid_kernel *shmsegptr)
- {
- int error;
- MAC_POLICY_CHECK_NOSLEEP(sysvshm_check_shmdt, cred, shmsegptr,
- shmsegptr->label);
- MAC_CHECK_PROBE2(sysvshm_check_shmdt, error, cred, shmsegptr);
- return (error);
- }
- MAC_CHECK_PROBE_DEFINE3(sysvshm_check_shmget, "struct ucred *",
- "struct shmid_kernel *", "int");
- int
- mac_sysvshm_check_shmget(struct ucred *cred, struct shmid_kernel *shmsegptr,
- int shmflg)
- {
- int error;
- MAC_POLICY_CHECK_NOSLEEP(sysvshm_check_shmget, cred, shmsegptr,
- shmsegptr->label, shmflg);
- MAC_CHECK_PROBE3(sysvshm_check_shmget, error, cred, shmsegptr,
- shmflg);
- return (error);
- }
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