6356dba0b4
(1) Abstract interpreter vnode labeling in execve(2) and mac_execve(2)
so that the general exec code isn't aware of the details of
allocating, copying, and freeing labels, rather, simply passes in
a void pointer to start and stop functions that will be used by
the framework. This change will be MFC'd.
(2) Introduce a new flags field to the MAC_POLICY_SET(9) interface
allowing policies to declare which types of objects require label
allocation, initialization, and destruction, and define a set of
flags covering various supported object types (MPC_OBJECT_PROC,
MPC_OBJECT_VNODE, MPC_OBJECT_INPCB, ...). This change reduces the
overhead of compiling the MAC Framework into the kernel if policies
aren't loaded, or if policies require labels on only a small number
or even no object types. Each time a policy is loaded or unloaded,
we recalculate a mask of labeled object types across all policies
present in the system. Eliminate MAC_ALWAYS_LABEL_MBUF option as it
is no longer required.
MFC after: 1 week ((1) only)
Reviewed by: csjp
Obtained from: TrustedBSD Project
Sponsored by: Apple, Inc.
228 lines
5.0 KiB
C
228 lines
5.0 KiB
C
/*-
|
|
* Copyright (c) 2002-2003 Networks Associates Technology, Inc.
|
|
* Copyright (c) 2006 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.
|
|
*
|
|
* This software was enhanced by SPARTA ISSO under SPAWAR contract
|
|
* N66001-04-C-6019 ("SEFOS").
|
|
*
|
|
* 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 <sys/param.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/lock.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/module.h>
|
|
#include <sys/mutex.h>
|
|
#include <sys/sbuf.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/vnode.h>
|
|
#include <sys/pipe.h>
|
|
#include <sys/sysctl.h>
|
|
|
|
#include <security/mac/mac_framework.h>
|
|
#include <security/mac/mac_internal.h>
|
|
#include <security/mac/mac_policy.h>
|
|
|
|
struct label *
|
|
mac_pipe_label_alloc(void)
|
|
{
|
|
struct label *label;
|
|
|
|
label = mac_labelzone_alloc(M_WAITOK);
|
|
MAC_PERFORM(pipe_init_label, label);
|
|
return (label);
|
|
}
|
|
|
|
void
|
|
mac_pipe_init(struct pipepair *pp)
|
|
{
|
|
|
|
if (mac_labeled & MPC_OBJECT_PIPE)
|
|
pp->pp_label = mac_pipe_label_alloc();
|
|
else
|
|
pp->pp_label = NULL;
|
|
}
|
|
|
|
void
|
|
mac_pipe_label_free(struct label *label)
|
|
{
|
|
|
|
MAC_PERFORM(pipe_destroy_label, label);
|
|
mac_labelzone_free(label);
|
|
}
|
|
|
|
void
|
|
mac_pipe_destroy(struct pipepair *pp)
|
|
{
|
|
|
|
if (pp->pp_label != NULL) {
|
|
mac_pipe_label_free(pp->pp_label);
|
|
pp->pp_label = NULL;
|
|
}
|
|
}
|
|
|
|
void
|
|
mac_pipe_copy_label(struct label *src, struct label *dest)
|
|
{
|
|
|
|
MAC_PERFORM(pipe_copy_label, src, dest);
|
|
}
|
|
|
|
int
|
|
mac_pipe_externalize_label(struct label *label, char *elements,
|
|
char *outbuf, size_t outbuflen)
|
|
{
|
|
int error;
|
|
|
|
MAC_EXTERNALIZE(pipe, label, elements, outbuf, outbuflen);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_pipe_internalize_label(struct label *label, char *string)
|
|
{
|
|
int error;
|
|
|
|
MAC_INTERNALIZE(pipe, label, string);
|
|
|
|
return (error);
|
|
}
|
|
|
|
void
|
|
mac_pipe_create(struct ucred *cred, struct pipepair *pp)
|
|
{
|
|
|
|
MAC_PERFORM(pipe_create, cred, pp, pp->pp_label);
|
|
}
|
|
|
|
static void
|
|
mac_pipe_relabel(struct ucred *cred, struct pipepair *pp,
|
|
struct label *newlabel)
|
|
{
|
|
|
|
MAC_PERFORM(pipe_relabel, cred, pp, pp->pp_label, newlabel);
|
|
}
|
|
|
|
int
|
|
mac_pipe_check_ioctl(struct ucred *cred, struct pipepair *pp,
|
|
unsigned long cmd, void *data)
|
|
{
|
|
int error;
|
|
|
|
mtx_assert(&pp->pp_mtx, MA_OWNED);
|
|
|
|
MAC_CHECK(pipe_check_ioctl, cred, pp, pp->pp_label, cmd, data);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_pipe_check_poll(struct ucred *cred, struct pipepair *pp)
|
|
{
|
|
int error;
|
|
|
|
mtx_assert(&pp->pp_mtx, MA_OWNED);
|
|
|
|
MAC_CHECK(pipe_check_poll, cred, pp, pp->pp_label);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_pipe_check_read(struct ucred *cred, struct pipepair *pp)
|
|
{
|
|
int error;
|
|
|
|
mtx_assert(&pp->pp_mtx, MA_OWNED);
|
|
|
|
MAC_CHECK(pipe_check_read, cred, pp, pp->pp_label);
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
mac_pipe_check_relabel(struct ucred *cred, struct pipepair *pp,
|
|
struct label *newlabel)
|
|
{
|
|
int error;
|
|
|
|
mtx_assert(&pp->pp_mtx, MA_OWNED);
|
|
|
|
MAC_CHECK(pipe_check_relabel, cred, pp, pp->pp_label, newlabel);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_pipe_check_stat(struct ucred *cred, struct pipepair *pp)
|
|
{
|
|
int error;
|
|
|
|
mtx_assert(&pp->pp_mtx, MA_OWNED);
|
|
|
|
MAC_CHECK(pipe_check_stat, cred, pp, pp->pp_label);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_pipe_check_write(struct ucred *cred, struct pipepair *pp)
|
|
{
|
|
int error;
|
|
|
|
mtx_assert(&pp->pp_mtx, MA_OWNED);
|
|
|
|
MAC_CHECK(pipe_check_write, cred, pp, pp->pp_label);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
mac_pipe_label_set(struct ucred *cred, struct pipepair *pp,
|
|
struct label *label)
|
|
{
|
|
int error;
|
|
|
|
mtx_assert(&pp->pp_mtx, MA_OWNED);
|
|
|
|
error = mac_pipe_check_relabel(cred, pp, label);
|
|
if (error)
|
|
return (error);
|
|
|
|
mac_pipe_relabel(cred, pp, label);
|
|
|
|
return (0);
|
|
}
|