freebsd-dev/sys/security/mac/mac_sysv_msg.c
Attilio Rao 54366c0bd7 - For kernel compiled only with KDTRACE_HOOKS and not any lock debugging
option, unbreak the lock tracing release semantic by embedding
  calls to LOCKSTAT_PROFILE_RELEASE_LOCK() direclty in the inlined
  version of the releasing functions for mutex, rwlock and sxlock.
  Failing to do so skips the lockstat_probe_func invokation for
  unlocking.
- As part of the LOCKSTAT support is inlined in mutex operation, for
  kernel compiled without lock debugging options, potentially every
  consumer must be compiled including opt_kdtrace.h.
  Fix this by moving KDTRACE_HOOKS into opt_global.h and remove the
  dependency by opt_kdtrace.h for all files, as now only KDTRACE_FRAMES
  is linked there and it is only used as a compile-time stub [0].

[0] immediately shows some new bug as DTRACE-derived support for debug
in sfxge is broken and it was never really tested.  As it was not
including correctly opt_kdtrace.h before it was never enabled so it
was kept broken for a while.  Fix this by using a protection stub,
leaving sfxge driver authors the responsibility for fixing it
appropriately [1].

Sponsored by:	EMC / Isilon storage division
Discussed with:	rstone
[0] Reported by:	rstone
[1] Discussed with:	philip
2013-11-25 07:38:45 +00:00

278 lines
6.9 KiB
C

/*-
* Copyright (c) 2003-2004 Networks Associates Technology, Inc.
* Copyright (c) 2006 SPARTA, Inc.
* Copyright (c) 2008 Apple 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>
__FBSDID("$FreeBSD$");
#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/sdt.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/msg.h>
#include <security/mac/mac_framework.h>
#include <security/mac/mac_internal.h>
#include <security/mac/mac_policy.h>
static struct label *
mac_sysv_msgmsg_label_alloc(void)
{
struct label *label;
label = mac_labelzone_alloc(M_WAITOK);
MAC_POLICY_PERFORM(sysvmsg_init_label, label);
return (label);
}
void
mac_sysvmsg_init(struct msg *msgptr)
{
if (mac_labeled & MPC_OBJECT_SYSVMSG)
msgptr->label = mac_sysv_msgmsg_label_alloc();
else
msgptr->label = NULL;
}
static struct label *
mac_sysv_msgqueue_label_alloc(void)
{
struct label *label;
label = mac_labelzone_alloc(M_WAITOK);
MAC_POLICY_PERFORM(sysvmsq_init_label, label);
return (label);
}
void
mac_sysvmsq_init(struct msqid_kernel *msqkptr)
{
if (mac_labeled & MPC_OBJECT_SYSVMSQ)
msqkptr->label = mac_sysv_msgqueue_label_alloc();
else
msqkptr->label = NULL;
}
static void
mac_sysv_msgmsg_label_free(struct label *label)
{
MAC_POLICY_PERFORM_NOSLEEP(sysvmsg_destroy_label, label);
mac_labelzone_free(label);
}
void
mac_sysvmsg_destroy(struct msg *msgptr)
{
if (msgptr->label != NULL) {
mac_sysv_msgmsg_label_free(msgptr->label);
msgptr->label = NULL;
}
}
static void
mac_sysv_msgqueue_label_free(struct label *label)
{
MAC_POLICY_PERFORM_NOSLEEP(sysvmsq_destroy_label, label);
mac_labelzone_free(label);
}
void
mac_sysvmsq_destroy(struct msqid_kernel *msqkptr)
{
if (msqkptr->label != NULL) {
mac_sysv_msgqueue_label_free(msqkptr->label);
msqkptr->label = NULL;
}
}
void
mac_sysvmsg_create(struct ucred *cred, struct msqid_kernel *msqkptr,
struct msg *msgptr)
{
MAC_POLICY_PERFORM_NOSLEEP(sysvmsg_create, cred, msqkptr,
msqkptr->label, msgptr, msgptr->label);
}
void
mac_sysvmsq_create(struct ucred *cred, struct msqid_kernel *msqkptr)
{
MAC_POLICY_PERFORM_NOSLEEP(sysvmsq_create, cred, msqkptr,
msqkptr->label);
}
void
mac_sysvmsg_cleanup(struct msg *msgptr)
{
MAC_POLICY_PERFORM_NOSLEEP(sysvmsg_cleanup, msgptr->label);
}
void
mac_sysvmsq_cleanup(struct msqid_kernel *msqkptr)
{
MAC_POLICY_PERFORM_NOSLEEP(sysvmsq_cleanup, msqkptr->label);
}
MAC_CHECK_PROBE_DEFINE3(sysvmsq_check_msgmsq, "struct ucred *",
"struct msg *", "struct msqid_kernel *");
int
mac_sysvmsq_check_msgmsq(struct ucred *cred, struct msg *msgptr,
struct msqid_kernel *msqkptr)
{
int error;
MAC_POLICY_CHECK_NOSLEEP(sysvmsq_check_msgmsq, cred, msgptr,
msgptr->label, msqkptr, msqkptr->label);
MAC_CHECK_PROBE3(sysvmsq_check_msgmsq, error, cred, msgptr, msqkptr);
return (error);
}
MAC_CHECK_PROBE_DEFINE2(sysvmsq_check_msgrcv, "struct ucred *",
"struct msg *");
int
mac_sysvmsq_check_msgrcv(struct ucred *cred, struct msg *msgptr)
{
int error;
MAC_POLICY_CHECK_NOSLEEP(sysvmsq_check_msgrcv, cred, msgptr,
msgptr->label);
MAC_CHECK_PROBE2(sysvmsq_check_msgrcv, error, cred, msgptr);
return (error);
}
MAC_CHECK_PROBE_DEFINE2(sysvmsq_check_msgrmid, "struct ucred *",
"struct msg *");
int
mac_sysvmsq_check_msgrmid(struct ucred *cred, struct msg *msgptr)
{
int error;
MAC_POLICY_CHECK_NOSLEEP(sysvmsq_check_msgrmid, cred, msgptr,
msgptr->label);
MAC_CHECK_PROBE2(sysvmsq_check_msgrmid, error, cred, msgptr);
return (error);
}
MAC_CHECK_PROBE_DEFINE2(sysvmsq_check_msqget, "struct ucred *",
"struct msqid_kernel *");
int
mac_sysvmsq_check_msqget(struct ucred *cred, struct msqid_kernel *msqkptr)
{
int error;
MAC_POLICY_CHECK_NOSLEEP(sysvmsq_check_msqget, cred, msqkptr,
msqkptr->label);
MAC_CHECK_PROBE2(sysvmsq_check_msqget, error, cred, msqkptr);
return (error);
}
MAC_CHECK_PROBE_DEFINE2(sysvmsq_check_msqsnd, "struct ucred *",
"struct msqid_kernel *");
int
mac_sysvmsq_check_msqsnd(struct ucred *cred, struct msqid_kernel *msqkptr)
{
int error;
MAC_POLICY_CHECK_NOSLEEP(sysvmsq_check_msqsnd, cred, msqkptr,
msqkptr->label);
MAC_CHECK_PROBE2(sysvmsq_check_msqsnd, error, cred, msqkptr);
return (error);
}
MAC_CHECK_PROBE_DEFINE2(sysvmsq_check_msqrcv, "struct ucred *",
"struct msqid_kernel *");
int
mac_sysvmsq_check_msqrcv(struct ucred *cred, struct msqid_kernel *msqkptr)
{
int error;
MAC_POLICY_CHECK_NOSLEEP(sysvmsq_check_msqrcv, cred, msqkptr,
msqkptr->label);
MAC_CHECK_PROBE2(sysvmsq_check_msqrcv, error, cred, msqkptr);
return (error);
}
MAC_CHECK_PROBE_DEFINE3(sysvmsq_check_msqctl, "struct ucred *",
"struct msqid_kernel *", "int");
int
mac_sysvmsq_check_msqctl(struct ucred *cred, struct msqid_kernel *msqkptr,
int cmd)
{
int error;
MAC_POLICY_CHECK_NOSLEEP(sysvmsq_check_msqctl, cred, msqkptr,
msqkptr->label, cmd);
MAC_CHECK_PROBE3(sysvmsq_check_msqctl, error, cred, msqkptr, cmd);
return (error);
}