t_kauth_pr_47598.c revision 1.3.2.2
1 1.3.2.2 yamt /*- 2 1.3.2.2 yamt * Copyright (c) 2013 The NetBSD Foundation, Inc. 3 1.3.2.2 yamt * All rights reserved. 4 1.3.2.2 yamt * 5 1.3.2.2 yamt * Redistribution and use in source and binary forms, with or without 6 1.3.2.2 yamt * modification, are permitted provided that the following conditions 7 1.3.2.2 yamt * are met: 8 1.3.2.2 yamt * 1. Redistributions of source code must retain the above copyright 9 1.3.2.2 yamt * notice, this list of conditions and the following disclaimer. 10 1.3.2.2 yamt * 2. Redistributions in binary form must reproduce the above copyright 11 1.3.2.2 yamt * notice, this list of conditions and the following disclaimer in the 12 1.3.2.2 yamt * documentation and/or other materials provided with the distribution. 13 1.3.2.2 yamt * 14 1.3.2.2 yamt * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 15 1.3.2.2 yamt * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 16 1.3.2.2 yamt * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 17 1.3.2.2 yamt * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 18 1.3.2.2 yamt * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 19 1.3.2.2 yamt * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 20 1.3.2.2 yamt * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 21 1.3.2.2 yamt * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 22 1.3.2.2 yamt * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 23 1.3.2.2 yamt * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 24 1.3.2.2 yamt * POSSIBILITY OF SUCH DAMAGE. 25 1.3.2.2 yamt */ 26 1.3.2.2 yamt 27 1.3.2.2 yamt #include <sys/cdefs.h> 28 1.3.2.2 yamt __COPYRIGHT("@(#) Copyright (c) 2013\ 29 1.3.2.2 yamt The NetBSD Foundation, inc. All rights reserved."); 30 1.3.2.2 yamt __RCSID("$NetBSD: t_kauth_pr_47598.c,v 1.3.2.2 2014/05/22 11:42:19 yamt Exp $"); 31 1.3.2.2 yamt 32 1.3.2.2 yamt #include <errno.h> 33 1.3.2.2 yamt #include <unistd.h> 34 1.3.2.2 yamt #include <stdio.h> 35 1.3.2.2 yamt #include <stdlib.h> 36 1.3.2.2 yamt #include <sys/sysctl.h> 37 1.3.2.2 yamt #include <sys/socket.h> 38 1.3.2.2 yamt #include <netinet/in.h> 39 1.3.2.2 yamt #include <arpa/inet.h> 40 1.3.2.2 yamt #include <atf-c.h> 41 1.3.2.2 yamt 42 1.3.2.2 yamt /* 43 1.3.2.2 yamt * helper function 44 1.3.2.2 yamt */ 45 1.3.2.2 yamt static const char curtain_name[] = "security.models.bsd44.curtain"; 46 1.3.2.2 yamt static const char securelevel_name[] = "security.models.bsd44.securelevel"; 47 1.3.2.2 yamt 48 1.3.2.2 yamt static bool may_lower_curtain(void); 49 1.3.2.2 yamt static int get_curtain(void); 50 1.3.2.2 yamt static void set_curtain(int newval); 51 1.3.2.2 yamt 52 1.3.2.2 yamt static bool 53 1.3.2.2 yamt may_lower_curtain(void) 54 1.3.2.2 yamt { 55 1.3.2.2 yamt int seclevel; 56 1.3.2.2 yamt size_t len = sizeof(seclevel); 57 1.3.2.2 yamt 58 1.3.2.2 yamt if (sysctlbyname(securelevel_name, &seclevel, &len, NULL, 0) != 0) 59 1.3.2.2 yamt atf_tc_fail("failed to read %s", securelevel_name); 60 1.3.2.2 yamt 61 1.3.2.2 yamt return seclevel <= 0; 62 1.3.2.2 yamt } 63 1.3.2.2 yamt 64 1.3.2.2 yamt static int 65 1.3.2.2 yamt get_curtain(void) 66 1.3.2.2 yamt { 67 1.3.2.2 yamt int curtain; 68 1.3.2.2 yamt size_t len = sizeof(curtain); 69 1.3.2.2 yamt 70 1.3.2.2 yamt if (sysctlbyname(curtain_name, &curtain, &len, NULL, 0) != 0) 71 1.3.2.2 yamt atf_tc_fail("failed to read %s", curtain_name); 72 1.3.2.2 yamt 73 1.3.2.2 yamt return curtain; 74 1.3.2.2 yamt } 75 1.3.2.2 yamt 76 1.3.2.2 yamt static void 77 1.3.2.2 yamt set_curtain(int newval) 78 1.3.2.2 yamt { 79 1.3.2.2 yamt 80 1.3.2.2 yamt if (sysctlbyname(curtain_name, NULL, 0, &newval, sizeof(newval)) != 0) 81 1.3.2.2 yamt atf_tc_fail("failed to set %s to %d", curtain_name, newval); 82 1.3.2.2 yamt } 83 1.3.2.2 yamt 84 1.3.2.2 yamt /* 85 1.3.2.2 yamt * PR kern/47598: if security.models.extensions.curtain = 1 we crash when 86 1.3.2.2 yamt * doing a netstat while an embryonic (not yet fully accepted) connection 87 1.3.2.2 yamt * exists. 88 1.3.2.2 yamt * This has been fixed with rev. 1.5 of 89 1.3.2.2 yamt * src/sys/secmodel/extensions/secmodel_extensions.c. 90 1.3.2.2 yamt */ 91 1.3.2.2 yamt 92 1.3.2.2 yamt 93 1.3.2.2 yamt ATF_TC(kauth_curtain); 94 1.3.2.2 yamt ATF_TC_HEAD(kauth_curtain, tc) 95 1.3.2.2 yamt { 96 1.3.2.2 yamt atf_tc_set_md_var(tc, "require.user", "root"); 97 1.3.2.2 yamt atf_tc_set_md_var(tc, "require.progs", "netstat"); 98 1.3.2.2 yamt atf_tc_set_md_var(tc, "descr", 99 1.3.2.2 yamt "Checks for kernel crash with curtain active (PR kern/47598)"); 100 1.3.2.2 yamt } 101 1.3.2.2 yamt 102 1.3.2.2 yamt ATF_TC_BODY(kauth_curtain, tc) 103 1.3.2.2 yamt { 104 1.3.2.2 yamt 105 1.3.2.2 yamt int old_curtain, s, s2, err; 106 1.3.2.2 yamt socklen_t slen; 107 1.3.2.2 yamt struct sockaddr_in sa; 108 1.3.2.2 yamt 109 1.3.2.2 yamt /* 110 1.3.2.2 yamt * save old value of "curtain" and enable it 111 1.3.2.2 yamt */ 112 1.3.2.2 yamt old_curtain = get_curtain(); 113 1.3.2.2 yamt if (old_curtain < 1 && !may_lower_curtain()) 114 1.3.2.2 yamt atf_tc_skip("curtain is not enabled and we would not be able" 115 1.3.2.2 yamt " to drop it later due to securelevel settings"); 116 1.3.2.2 yamt 117 1.3.2.2 yamt set_curtain(1); 118 1.3.2.2 yamt 119 1.3.2.2 yamt /* 120 1.3.2.2 yamt * create a socket and bind it to some arbitray free port 121 1.3.2.2 yamt */ 122 1.3.2.2 yamt s = socket(PF_INET, SOCK_STREAM|SOCK_NONBLOCK, 0); 123 1.3.2.2 yamt ATF_REQUIRE(s != -1); 124 1.3.2.2 yamt memset(&sa, 0, sizeof(sa)); 125 1.3.2.2 yamt sa.sin_family = AF_INET; 126 1.3.2.2 yamt sa.sin_len = sizeof(sa); 127 1.3.2.2 yamt sa.sin_addr.s_addr = inet_addr("127.0.0.1"); 128 1.3.2.2 yamt ATF_REQUIRE(bind(s, (struct sockaddr *)&sa, sizeof(sa))==0); 129 1.3.2.2 yamt ATF_REQUIRE(listen(s, 16)==0); 130 1.3.2.2 yamt 131 1.3.2.2 yamt /* 132 1.3.2.2 yamt * extract address and open a connection to the port 133 1.3.2.2 yamt */ 134 1.3.2.2 yamt slen = sizeof(sa); 135 1.3.2.2 yamt ATF_REQUIRE(getsockname(s, (struct sockaddr *)&sa, &slen)==0); 136 1.3.2.2 yamt s2 = socket(PF_INET, SOCK_STREAM|SOCK_NONBLOCK, 0); 137 1.3.2.2 yamt ATF_REQUIRE(s2 != -1); 138 1.3.2.2 yamt printf("port is %d\n", ntohs(sa.sin_port)); 139 1.3.2.2 yamt err = connect(s2, (struct sockaddr *)&sa, sizeof(sa)); 140 1.3.2.2 yamt ATF_REQUIRE_MSG(err == -1 && errno == EINPROGRESS, 141 1.3.2.2 yamt "conect returned %d with errno %d", err, errno); 142 1.3.2.2 yamt fflush(stdout); 143 1.3.2.2 yamt fflush(stderr); 144 1.3.2.2 yamt 145 1.3.2.2 yamt /* 146 1.3.2.2 yamt * we now have a pending, not yet accepted connection - run netstat 147 1.3.2.2 yamt */ 148 1.3.2.2 yamt system("netstat -aA"); 149 1.3.2.2 yamt 150 1.3.2.2 yamt /* 151 1.3.2.2 yamt * cleanup 152 1.3.2.2 yamt */ 153 1.3.2.2 yamt close(s2); 154 1.3.2.2 yamt close(s); 155 1.3.2.2 yamt 156 1.3.2.2 yamt /* 157 1.3.2.2 yamt * restore old value of curtain 158 1.3.2.2 yamt */ 159 1.3.2.2 yamt set_curtain(old_curtain); 160 1.3.2.2 yamt } 161 1.3.2.2 yamt 162 1.3.2.2 yamt ATF_TP_ADD_TCS(tp) 163 1.3.2.2 yamt { 164 1.3.2.2 yamt ATF_TP_ADD_TC(tp, kauth_curtain); 165 1.3.2.2 yamt 166 1.3.2.2 yamt return atf_no_error(); 167 1.3.2.2 yamt } 168 1.3.2.2 yamt 169 1.3.2.2 yamt 170
Indexes created Thu Oct 09 07:10:06 GMT 2025