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t_kauth_pr_47598.c revision 1.2 
      1 /*-
      2  * Copyright (c) 2013 The NetBSD Foundation, Inc.
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  *
     14  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     15  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     16  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     17  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     18  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     19  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     20  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     21  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     22  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     23  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     24  * POSSIBILITY OF SUCH DAMAGE.
     25  */
     26 
     27 #include <sys/cdefs.h>
     28 __COPYRIGHT("@(#) Copyright (c) 2013\
     29  The NetBSD Foundation, inc. All rights reserved.");
     30 __RCSID("$NetBSD: t_kauth_pr_47598.c,v 1.2 2013/02/28 20:41:21 martin Exp $");
     31 
     32 #include <errno.h>
     33 #include <unistd.h>
     34 #include <stdio.h>
     35 #include <stdlib.h>
     36 #include <sys/sysctl.h>
     37 #include <sys/socket.h>
     38 #include <netinet/in.h>
     39 #include <arpa/inet.h>
     40 #include <atf-c.h>
     41 
     42 /*
     43  * PR kern/47598: if security.models.extensions.curtain = 1 we crash when
     44  * doing a netstat while an embryonic (not yet fully accepted) connection
     45  * exists.
     46  * This has been fixed with rev. 1.5 of
     47  *   src/sys/secmodel/extensions/secmodel_extensions.c.
     48  */
     49 
     50 
     51 ATF_TC(kauth_curtain);
     52 ATF_TC_HEAD(kauth_curtain, tc)
     53 {
     54 	atf_tc_set_md_var(tc, "require.user", "root");
     55 	atf_tc_set_md_var(tc, "require.progs", "netstat");
     56 	atf_tc_set_md_var(tc, "descr",
     57 	    "Checks for kernel crash with curtain active (PR kern/47598)");
     58 }
     59 
     60 ATF_TC_BODY(kauth_curtain, tc)
     61 {
     62 	static const char curtain_name[] = "security.models.bsd44.curtain";
     63 
     64 	int old_curtain, new_curtain = 1, s, s2, err;
     65 	size_t old_curtain_len = sizeof(old_curtain);
     66 	socklen_t slen;
     67 	struct sockaddr_in sa;
     68 
     69 	/*
     70 	 * save old value of "curtain" and enable it
     71 	 */
     72 	if (sysctlbyname(curtain_name, &old_curtain, &old_curtain_len,
     73 	    &new_curtain, sizeof(new_curtain)) != 0)
     74 		atf_tc_fail("failed to enable %s", curtain_name);
     75 
     76 	/*
     77 	 * create a socket and bind it to some arbitray free port
     78 	 */
     79 	s = socket(PF_INET, SOCK_STREAM|SOCK_NONBLOCK, 0);
     80 	ATF_REQUIRE(s != -1);
     81 	memset(&sa, 0, sizeof(sa));
     82 	sa.sin_family = AF_INET;
     83 	sa.sin_len = sizeof(sa);
     84 	sa.sin_addr.s_addr = inet_addr("127.0.0.1");
     85 	ATF_REQUIRE(bind(s, (struct sockaddr *)&sa, sizeof(sa))==0);
     86 	ATF_REQUIRE(listen(s, 16)==0);
     87 
     88 	/*
     89 	 * extract address and open a connection to the port
     90 	 */
     91 	slen = sizeof(sa);
     92 	ATF_REQUIRE(getsockname(s, (struct sockaddr *)&sa, &slen)==0);
     93 	s2 = socket(PF_INET, SOCK_STREAM|SOCK_NONBLOCK, 0);
     94 	ATF_REQUIRE(s2 != -1);
     95 	printf("port is %d\n", ntohs(sa.sin_port));
     96 	err = connect(s2, (struct sockaddr *)&sa, sizeof(sa));
     97 	ATF_REQUIRE_MSG(err == -1 && errno == EINPROGRESS,
     98 	    "conect returned %d with errno %d", err, errno);
     99 	fflush(stdout);
    100 	fflush(stderr);
    101 
    102 	/*
    103 	 * we now have a pending, not yet accepted connection - run netstat
    104 	 */
    105 	system("netstat -aA");
    106 
    107 	/*
    108 	 * cleanup
    109 	 */
    110 	close(s2);
    111 	close(s);
    112 
    113 	/*
    114 	 * restore old value of curtain
    115 	 */
    116 	if (sysctlbyname(curtain_name, NULL, 0,
    117 	    &old_curtain, sizeof(old_curtain)) != 0)
    118 		atf_tc_fail("failed to restore %s", curtain_name);
    119 }
    120 
    121 ATF_TP_ADD_TCS(tp)
    122 {
    123 	ATF_TP_ADD_TC(tp, kauth_curtain);
    124 
    125 	return atf_no_error();
    126 }
    127 
    128 
    129