tests/kernel/t_kauth_pr_47598.c

   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