1 /* $NetBSD: t_kevent.c,v 1.7 2015/02/05 13:55:37 isaki Exp $ */ 2 3 /*- 4 * Copyright (c) 2011 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundatiom 8 * by Christos Zoulas. 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 #include <sys/cdefs.h> 32 __RCSID("$NetBSD: t_kevent.c,v 1.7 2015/02/05 13:55:37 isaki Exp $"); 33 34 #include <sys/types.h> 35 #include <sys/event.h> 36 37 #include <atf-c.h> 38 #include <errno.h> 39 #include <time.h> 40 #include <stdio.h> 41 #include <stdlib.h> 42 #include <string.h> 43 #include <unistd.h> 44 #include <fcntl.h> 45 #include <err.h> 46 #ifdef __NetBSD__ 47 #include <sys/drvctlio.h> 48 #else 49 #define DRVCTLDEV "/nonexistent" 50 #endif 51 #include <sys/event.h> 52 #include <sys/time.h> 53 #include <sys/socket.h> 54 #include <sys/wait.h> 55 56 ATF_TC(kevent_zerotimer); 57 ATF_TC_HEAD(kevent_zerotimer, tc) 58 { 59 atf_tc_set_md_var(tc, "descr", "Checks that kevent with a 0 timer " 60 "does not crash the system (PR lib/45618)"); 61 } 62 63 ATF_TC_BODY(kevent_zerotimer, tc) 64 { 65 struct kevent ev; 66 int kq; 67 68 ATF_REQUIRE((kq = kqueue()) != -1); 69 EV_SET(&ev, 1, EVFILT_TIMER, EV_ADD|EV_ENABLE, 0, 1, 0); 70 ATF_REQUIRE(kevent(kq, &ev, 1, NULL, 0, NULL) != -1); 71 ATF_REQUIRE(kevent(kq, NULL, 0, &ev, 1, NULL) == 1); 72 } 73 74 ATF_TC(kqueue_desc_passing); 75 ATF_TC_HEAD(kqueue_desc_passing, tc) 76 { 77 atf_tc_set_md_var(tc, "descr", "Checks that passing a kqueue to " 78 "another process does not crash the kernel (PR 46463)"); 79 } 80 81 ATF_TC_BODY(kqueue_desc_passing, tc) 82 { 83 pid_t child; 84 int s[2], storage, status, kq; 85 struct cmsghdr *msg; 86 struct iovec iov; 87 struct msghdr m; 88 struct kevent ev; 89 90 ATF_REQUIRE((kq = kqueue()) != -1); 91 92 // atf_tc_skip("crashes kernel (PR 46463)"); 93 94 ATF_REQUIRE(socketpair(AF_LOCAL, SOCK_STREAM, 0, s) != -1); 95 msg = malloc(CMSG_SPACE(sizeof(int))); 96 m.msg_iov = &iov; 97 m.msg_iovlen = 1; 98 m.msg_name = NULL; 99 m.msg_namelen = 0; 100 m.msg_control = msg; 101 m.msg_controllen = CMSG_SPACE(sizeof(int)); 102 #ifdef __FreeBSD__ 103 m.msg_flags = 0; 104 #endif 105 106 child = fork(); 107 if (child == 0) { 108 close(s[0]); 109 110 iov.iov_base = &storage; 111 iov.iov_len = sizeof(int); 112 m.msg_iov = &iov; 113 m.msg_iovlen = 1; 114 115 if (recvmsg(s[1], &m, 0) == -1) 116 err(1, "child: could not recvmsg"); 117 118 kq = *(int *)CMSG_DATA(msg); 119 printf("child (pid %d): received kq fd %d\n", getpid(), kq); 120 exit(0); 121 } 122 123 close(s[1]); 124 125 iov.iov_base = &storage; 126 iov.iov_len = sizeof(int); 127 128 #ifdef __FreeBSD__ 129 msg = CMSG_FIRSTHDR(&m); 130 #endif 131 msg->cmsg_level = SOL_SOCKET; 132 msg->cmsg_type = SCM_RIGHTS; 133 msg->cmsg_len = CMSG_LEN(sizeof(int)); 134 135 #ifdef __NetBSD__ 136 *(int *)CMSG_DATA(msg) = kq; 137 #endif 138 139 EV_SET(&ev, 1, EVFILT_TIMER, EV_ADD|EV_ENABLE, 0, 1, 0); 140 ATF_CHECK(kevent(kq, &ev, 1, NULL, 0, NULL) != -1); 141 142 printf("parent (pid %d): sending kq fd %d\n", getpid(), kq); 143 if (sendmsg(s[0], &m, 0) == -1) { 144 ATF_REQUIRE_EQ_MSG(errno, EBADF, "errno is %d", errno); 145 atf_tc_skip("PR kern/46523"); 146 } 147 148 close(kq); 149 150 waitpid(child, &status, 0); 151 ATF_CHECK(WIFEXITED(status) && WEXITSTATUS(status)==0); 152 } 153 154 ATF_TC(kqueue_unsupported_fd); 155 ATF_TC_HEAD(kqueue_unsupported_fd, tc) 156 { 157 atf_tc_set_md_var(tc, "descr", "Checks that watching an fd whose" 158 " type is not supported does not crash the kernel"); 159 } 160 161 ATF_TC_BODY(kqueue_unsupported_fd, tc) 162 { 163 /* mqueue and semaphore use fnullop_kqueue also */ 164 int fd, kq; 165 struct kevent ev; 166 167 fd = open(DRVCTLDEV, O_RDONLY); 168 if (fd == -1) { 169 switch (errno) { 170 case ENOENT: 171 case ENXIO: 172 atf_tc_skip("no " DRVCTLDEV " available for testing"); 173 break; 174 } 175 } 176 ATF_REQUIRE(fd != -1); 177 ATF_REQUIRE((kq = kqueue()) != -1); 178 179 EV_SET(&ev, fd, EVFILT_VNODE, EV_ADD | EV_ENABLE | EV_CLEAR, 180 NOTE_DELETE|NOTE_WRITE|NOTE_EXTEND|NOTE_ATTRIB|NOTE_LINK| 181 NOTE_RENAME|NOTE_REVOKE, 0, 0); 182 183 ATF_REQUIRE(kevent(kq, &ev, 1, NULL, 0, NULL) == -1); 184 ATF_REQUIRE_ERRNO(EOPNOTSUPP, true); 185 186 (void)close(fd); 187 } 188 189 190 ATF_TP_ADD_TCS(tp) 191 { 192 193 ATF_TP_ADD_TC(tp, kevent_zerotimer); 194 ATF_TP_ADD_TC(tp, kqueue_desc_passing); 195 ATF_TP_ADD_TC(tp, kqueue_unsupported_fd); 196 197 return atf_no_error(); 198 } 199