1 /* $NetBSD: t_proc2.c,v 1.3 2017/01/13 21:30:41 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2008 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Peter Werner <Peter.Werner@wgsn.com>. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __COPYRIGHT("@(#) Copyright (c) 2008\ 34 The NetBSD Foundation, inc. All rights reserved."); 35 __RCSID("$NetBSD: t_proc2.c,v 1.3 2017/01/13 21:30:41 christos Exp $"); 36 37 #include <sys/event.h> 38 #include <sys/time.h> 39 #include <sys/types.h> 40 #include <sys/wait.h> 41 42 #include <err.h> 43 #include <pwd.h> 44 #include <stdio.h> 45 #include <stdlib.h> 46 #include <unistd.h> 47 48 #include <atf-c.h> 49 50 #include "h_macros.h" 51 52 static void 53 child_two(void) 54 { 55 _exit(EXIT_SUCCESS); 56 } 57 58 static void 59 child_one(void) 60 { 61 pid_t pid; 62 struct passwd *pwd; 63 const char *nam = "nobody"; 64 65 pwd = getpwnam(nam); 66 if (pwd == NULL) 67 err(EXIT_FAILURE, "getpwnam(\"%s\")", nam); 68 69 if ((setuid(pwd->pw_uid)) == -1) 70 err(EXIT_FAILURE, "setuid(%d)", pwd->pw_uid); 71 72 pid = fork(); 73 if (pid == -1) 74 err(EXIT_FAILURE, "fork()"); 75 76 if (pid == 0) 77 child_two(); 78 79 _exit(EXIT_SUCCESS); 80 } 81 82 ATF_TC(proc2); 83 ATF_TC_HEAD(proc2, tc) 84 { 85 atf_tc_set_md_var(tc, "require.user", "root"); 86 atf_tc_set_md_var(tc, "descr", 87 "Checks EVFILT_PROC for NOTE_FORK|NOTE_TRACK error path problem " 88 "fixed in rev. 1.1.1.1.2.17 of sys/kern/kern_event.c"); 89 } 90 ATF_TC_BODY(proc2, tc) 91 { 92 pid_t pid = 0; 93 int kq, status; 94 struct kevent ke; 95 struct timespec timeout; 96 97 RL(kq = kqueue()); 98 99 timeout.tv_sec = 0; 100 timeout.tv_nsec = 0; 101 102 RL(pid = fork()); 103 if (pid == 0) { 104 (void)sleep(1); /* let parent set kevent */ 105 child_one(); 106 /* NOTREACHED */ 107 } 108 109 EV_SET(&ke, (uintptr_t)pid, EVFILT_PROC, EV_ADD, NOTE_FORK|NOTE_TRACK, 110 0, 0); 111 112 RL(kevent(kq, &ke, 1, NULL, 0, &timeout)); 113 114 (void)sleep(2); 115 116 ke.ident = 0; 117 ke.fflags = 0; 118 ke.flags = EV_ENABLE; 119 120 RL(kevent(kq, NULL, 0, &ke, 1, &timeout)); 121 RL(close(kq)); 122 123 RL(waitpid(pid, &status, 0)); 124 ATF_REQUIRE(WIFEXITED(status)); 125 ATF_REQUIRE_EQ(WEXITSTATUS(status), EXIT_SUCCESS); 126 127 /* 128 * we are expecting an error here as we should not have 129 * been able to add a knote to child 2. 130 */ 131 ATF_REQUIRE(ke.fflags & NOTE_TRACKERR); 132 } 133 134 ATF_TP_ADD_TCS(tp) 135 { 136 ATF_TP_ADD_TC(tp, proc2); 137 138 return atf_no_error(); 139 } 140