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/*-
* Copyright (c) 2013 The NetBSD Foundation, Inc.
* All rights reserved.
*
* 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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>
__COPYRIGHT("@(#) Copyright (c) 2013\
The NetBSD Foundation, inc. All rights reserved.");
__RCSID("$NetBSD: t_kauth_pr_47598.c,v 1.3 2014/04/28 08:34:16 martin Exp $");
#include <errno.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/sysctl.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <atf-c.h>
/*
* helper function
*/
static const char curtain_name[] = "security.models.bsd44.curtain";
static const char securelevel_name[] = "security.models.bsd44.securelevel";
static bool may_lower_curtain(void);
static int get_curtain(void);
static void set_curtain(int newval);
static bool
may_lower_curtain(void)
{
int seclevel;
size_t len = sizeof(seclevel);
if (sysctlbyname(securelevel_name, &seclevel, &len, NULL, 0) != 0)
atf_tc_fail("failed to read %s", securelevel_name);
return seclevel <= 0;
}
static int
get_curtain(void)
{
int curtain;
size_t len = sizeof(curtain);
if (sysctlbyname(curtain_name, &curtain, &len, NULL, 0) != 0)
atf_tc_fail("failed to read %s", curtain_name);
return curtain;
}
static void
set_curtain(int newval)
{
if (sysctlbyname(curtain_name, NULL, 0, &newval, sizeof(newval)) != 0)
atf_tc_fail("failed to set %s to %d", curtain_name, newval);
}
/*
* PR kern/47598: if security.models.extensions.curtain = 1 we crash when
* doing a netstat while an embryonic (not yet fully accepted) connection
* exists.
* This has been fixed with rev. 1.5 of
* src/sys/secmodel/extensions/secmodel_extensions.c.
*/
ATF_TC(kauth_curtain);
ATF_TC_HEAD(kauth_curtain, tc)
{
atf_tc_set_md_var(tc, "require.user", "root");
atf_tc_set_md_var(tc, "require.progs", "netstat");
atf_tc_set_md_var(tc, "descr",
"Checks for kernel crash with curtain active (PR kern/47598)");
}
ATF_TC_BODY(kauth_curtain, tc)
{
int old_curtain, s, s2, err;
socklen_t slen;
struct sockaddr_in sa;
/*
* save old value of "curtain" and enable it
*/
old_curtain = get_curtain();
if (old_curtain < 1 && !may_lower_curtain())
atf_tc_skip("curtain is not enabled and we would not be able"
" to drop it later due to securelevel settings");
set_curtain(1);
/*
* create a socket and bind it to some arbitray free port
*/
s = socket(PF_INET, SOCK_STREAM|SOCK_NONBLOCK, 0);
ATF_REQUIRE(s != -1);
memset(&sa, 0, sizeof(sa));
sa.sin_family = AF_INET;
sa.sin_len = sizeof(sa);
sa.sin_addr.s_addr = inet_addr("127.0.0.1");
ATF_REQUIRE(bind(s, (struct sockaddr *)&sa, sizeof(sa))==0);
ATF_REQUIRE(listen(s, 16)==0);
/*
* extract address and open a connection to the port
*/
slen = sizeof(sa);
ATF_REQUIRE(getsockname(s, (struct sockaddr *)&sa, &slen)==0);
s2 = socket(PF_INET, SOCK_STREAM|SOCK_NONBLOCK, 0);
ATF_REQUIRE(s2 != -1);
printf("port is %d\n", ntohs(sa.sin_port));
err = connect(s2, (struct sockaddr *)&sa, sizeof(sa));
ATF_REQUIRE_MSG(err == -1 && errno == EINPROGRESS,
"conect returned %d with errno %d", err, errno);
fflush(stdout);
fflush(stderr);
/*
* we now have a pending, not yet accepted connection - run netstat
*/
system("netstat -aA");
/*
* cleanup
*/
close(s2);
close(s);
/*
* restore old value of curtain
*/
set_curtain(old_curtain);
}
ATF_TP_ADD_TCS(tp)
{
ATF_TP_ADD_TC(tp, kauth_curtain);
return atf_no_error();
}
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