t_kauth_pr_47598.c revision 1.2.4.3
1 1.2.4.2 tls /*- 2 1.2.4.2 tls * Copyright (c) 2013 The NetBSD Foundation, Inc. 3 1.2.4.2 tls * All rights reserved. 4 1.2.4.2 tls * 5 1.2.4.2 tls * Redistribution and use in source and binary forms, with or without 6 1.2.4.2 tls * modification, are permitted provided that the following conditions 7 1.2.4.2 tls * are met: 8 1.2.4.2 tls * 1. Redistributions of source code must retain the above copyright 9 1.2.4.2 tls * notice, this list of conditions and the following disclaimer. 10 1.2.4.2 tls * 2. Redistributions in binary form must reproduce the above copyright 11 1.2.4.2 tls * notice, this list of conditions and the following disclaimer in the 12 1.2.4.2 tls * documentation and/or other materials provided with the distribution. 13 1.2.4.2 tls * 14 1.2.4.2 tls * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 15 1.2.4.2 tls * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 16 1.2.4.2 tls * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 17 1.2.4.2 tls * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 18 1.2.4.2 tls * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 19 1.2.4.2 tls * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 20 1.2.4.2 tls * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 21 1.2.4.2 tls * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 22 1.2.4.2 tls * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 23 1.2.4.2 tls * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 24 1.2.4.2 tls * POSSIBILITY OF SUCH DAMAGE. 25 1.2.4.2 tls */ 26 1.2.4.2 tls 27 1.2.4.2 tls #include <sys/cdefs.h> 28 1.2.4.2 tls __COPYRIGHT("@(#) Copyright (c) 2013\ 29 1.2.4.2 tls The NetBSD Foundation, inc. All rights reserved."); 30 1.2.4.2 tls __RCSID("$NetBSD: t_kauth_pr_47598.c,v 1.2.4.3 2014/08/20 00:04:48 tls Exp $"); 31 1.2.4.2 tls 32 1.2.4.2 tls #include <errno.h> 33 1.2.4.2 tls #include <unistd.h> 34 1.2.4.2 tls #include <stdio.h> 35 1.2.4.2 tls #include <stdlib.h> 36 1.2.4.2 tls #include <sys/sysctl.h> 37 1.2.4.2 tls #include <sys/socket.h> 38 1.2.4.2 tls #include <netinet/in.h> 39 1.2.4.2 tls #include <arpa/inet.h> 40 1.2.4.2 tls #include <atf-c.h> 41 1.2.4.2 tls 42 1.2.4.2 tls /* 43 1.2.4.3 tls * helper function 44 1.2.4.3 tls */ 45 1.2.4.3 tls static const char curtain_name[] = "security.models.bsd44.curtain"; 46 1.2.4.3 tls static const char securelevel_name[] = "security.models.bsd44.securelevel"; 47 1.2.4.3 tls 48 1.2.4.3 tls static bool may_lower_curtain(void); 49 1.2.4.3 tls static int get_curtain(void); 50 1.2.4.3 tls static void set_curtain(int newval); 51 1.2.4.3 tls 52 1.2.4.3 tls static bool 53 1.2.4.3 tls may_lower_curtain(void) 54 1.2.4.3 tls { 55 1.2.4.3 tls int seclevel; 56 1.2.4.3 tls size_t len = sizeof(seclevel); 57 1.2.4.3 tls 58 1.2.4.3 tls if (sysctlbyname(securelevel_name, &seclevel, &len, NULL, 0) != 0) 59 1.2.4.3 tls atf_tc_fail("failed to read %s", securelevel_name); 60 1.2.4.3 tls 61 1.2.4.3 tls return seclevel <= 0; 62 1.2.4.3 tls } 63 1.2.4.3 tls 64 1.2.4.3 tls static int 65 1.2.4.3 tls get_curtain(void) 66 1.2.4.3 tls { 67 1.2.4.3 tls int curtain; 68 1.2.4.3 tls size_t len = sizeof(curtain); 69 1.2.4.3 tls 70 1.2.4.3 tls if (sysctlbyname(curtain_name, &curtain, &len, NULL, 0) != 0) 71 1.2.4.3 tls atf_tc_fail("failed to read %s", curtain_name); 72 1.2.4.3 tls 73 1.2.4.3 tls return curtain; 74 1.2.4.3 tls } 75 1.2.4.3 tls 76 1.2.4.3 tls static void 77 1.2.4.3 tls set_curtain(int newval) 78 1.2.4.3 tls { 79 1.2.4.3 tls 80 1.2.4.3 tls if (sysctlbyname(curtain_name, NULL, 0, &newval, sizeof(newval)) != 0) 81 1.2.4.3 tls atf_tc_fail("failed to set %s to %d", curtain_name, newval); 82 1.2.4.3 tls } 83 1.2.4.3 tls 84 1.2.4.3 tls /* 85 1.2.4.2 tls * PR kern/47598: if security.models.extensions.curtain = 1 we crash when 86 1.2.4.2 tls * doing a netstat while an embryonic (not yet fully accepted) connection 87 1.2.4.2 tls * exists. 88 1.2.4.2 tls * This has been fixed with rev. 1.5 of 89 1.2.4.2 tls * src/sys/secmodel/extensions/secmodel_extensions.c. 90 1.2.4.2 tls */ 91 1.2.4.2 tls 92 1.2.4.2 tls 93 1.2.4.2 tls ATF_TC(kauth_curtain); 94 1.2.4.2 tls ATF_TC_HEAD(kauth_curtain, tc) 95 1.2.4.2 tls { 96 1.2.4.2 tls atf_tc_set_md_var(tc, "require.user", "root"); 97 1.2.4.2 tls atf_tc_set_md_var(tc, "require.progs", "netstat"); 98 1.2.4.2 tls atf_tc_set_md_var(tc, "descr", 99 1.2.4.2 tls "Checks for kernel crash with curtain active (PR kern/47598)"); 100 1.2.4.2 tls } 101 1.2.4.2 tls 102 1.2.4.2 tls ATF_TC_BODY(kauth_curtain, tc) 103 1.2.4.2 tls { 104 1.2.4.2 tls 105 1.2.4.3 tls int old_curtain, s, s2, err; 106 1.2.4.2 tls socklen_t slen; 107 1.2.4.2 tls struct sockaddr_in sa; 108 1.2.4.2 tls 109 1.2.4.2 tls /* 110 1.2.4.2 tls * save old value of "curtain" and enable it 111 1.2.4.2 tls */ 112 1.2.4.3 tls old_curtain = get_curtain(); 113 1.2.4.3 tls if (old_curtain < 1 && !may_lower_curtain()) 114 1.2.4.3 tls atf_tc_skip("curtain is not enabled and we would not be able" 115 1.2.4.3 tls " to drop it later due to securelevel settings"); 116 1.2.4.3 tls 117 1.2.4.3 tls set_curtain(1); 118 1.2.4.2 tls 119 1.2.4.2 tls /* 120 1.2.4.2 tls * create a socket and bind it to some arbitray free port 121 1.2.4.2 tls */ 122 1.2.4.2 tls s = socket(PF_INET, SOCK_STREAM|SOCK_NONBLOCK, 0); 123 1.2.4.2 tls ATF_REQUIRE(s != -1); 124 1.2.4.2 tls memset(&sa, 0, sizeof(sa)); 125 1.2.4.2 tls sa.sin_family = AF_INET; 126 1.2.4.2 tls sa.sin_len = sizeof(sa); 127 1.2.4.2 tls sa.sin_addr.s_addr = inet_addr("127.0.0.1"); 128 1.2.4.2 tls ATF_REQUIRE(bind(s, (struct sockaddr *)&sa, sizeof(sa))==0); 129 1.2.4.2 tls ATF_REQUIRE(listen(s, 16)==0); 130 1.2.4.2 tls 131 1.2.4.2 tls /* 132 1.2.4.2 tls * extract address and open a connection to the port 133 1.2.4.2 tls */ 134 1.2.4.2 tls slen = sizeof(sa); 135 1.2.4.2 tls ATF_REQUIRE(getsockname(s, (struct sockaddr *)&sa, &slen)==0); 136 1.2.4.2 tls s2 = socket(PF_INET, SOCK_STREAM|SOCK_NONBLOCK, 0); 137 1.2.4.2 tls ATF_REQUIRE(s2 != -1); 138 1.2.4.2 tls printf("port is %d\n", ntohs(sa.sin_port)); 139 1.2.4.2 tls err = connect(s2, (struct sockaddr *)&sa, sizeof(sa)); 140 1.2.4.2 tls ATF_REQUIRE_MSG(err == -1 && errno == EINPROGRESS, 141 1.2.4.2 tls "conect returned %d with errno %d", err, errno); 142 1.2.4.2 tls fflush(stdout); 143 1.2.4.2 tls fflush(stderr); 144 1.2.4.2 tls 145 1.2.4.2 tls /* 146 1.2.4.2 tls * we now have a pending, not yet accepted connection - run netstat 147 1.2.4.2 tls */ 148 1.2.4.2 tls system("netstat -aA"); 149 1.2.4.2 tls 150 1.2.4.2 tls /* 151 1.2.4.2 tls * cleanup 152 1.2.4.2 tls */ 153 1.2.4.2 tls close(s2); 154 1.2.4.2 tls close(s); 155 1.2.4.2 tls 156 1.2.4.2 tls /* 157 1.2.4.2 tls * restore old value of curtain 158 1.2.4.2 tls */ 159 1.2.4.3 tls set_curtain(old_curtain); 160 1.2.4.2 tls } 161 1.2.4.2 tls 162 1.2.4.2 tls ATF_TP_ADD_TCS(tp) 163 1.2.4.2 tls { 164 1.2.4.2 tls ATF_TP_ADD_TC(tp, kauth_curtain); 165 1.2.4.2 tls 166 1.2.4.2 tls return atf_no_error(); 167 1.2.4.2 tls } 168 1.2.4.2 tls 169 1.2.4.2 tls 170
Indexes created Thu Oct 09 07:10:06 GMT 2025