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 #endif 49 #include <sys/event.h> 50 #include <sys/time.h> 51 #include <sys/socket.h> 52 #include <sys/wait.h> 53 54 #ifdef __FreeBSD__ 55 #define DRVCTLDEV "/nonexistent" 56 #endif 57 58 ATF_TC(kevent_zerotimer); 59 ATF_TC_HEAD(kevent_zerotimer, tc) 60 { 61 atf_tc_set_md_var(tc, "descr", "Checks that kevent with a 0 timer " 62 "does not crash the system (PR lib/45618)"); 63 } 64 65 ATF_TC_BODY(kevent_zerotimer, tc) 66 { 67 struct kevent ev; 68 int kq; 69 70 ATF_REQUIRE((kq = kqueue()) != -1); 71 EV_SET(&ev, 1, EVFILT_TIMER, EV_ADD|EV_ENABLE, 0, 1, 0); 72 ATF_REQUIRE(kevent(kq, &ev, 1, NULL, 0, NULL) != -1); 73 ATF_REQUIRE(kevent(kq, NULL, 0, &ev, 1, NULL) == 1); 74 } 75 76 ATF_TC(kqueue_desc_passing); 77 ATF_TC_HEAD(kqueue_desc_passing, tc) 78 { 79 atf_tc_set_md_var(tc, "descr", "Checks that passing a kqueue to " 80 "another process does not crash the kernel (PR 46463)"); 81 } 82 83 ATF_TC_BODY(kqueue_desc_passing, tc) 84 { 85 pid_t child; 86 int s[2], storage, status, kq; 87 struct cmsghdr *msg; 88 struct iovec iov; 89 struct msghdr m; 90 struct kevent ev; 91 92 ATF_REQUIRE((kq = kqueue()) != -1); 93 94 // atf_tc_skip("crashes kernel (PR 46463)"); 95 96 ATF_REQUIRE(socketpair(AF_LOCAL, SOCK_STREAM, 0, s) != -1); 97 msg = malloc(CMSG_SPACE(sizeof(int))); 98 m.msg_iov = &iov; 99 m.msg_iovlen = 1; 100 m.msg_name = NULL; 101 m.msg_namelen = 0; 102 m.msg_control = msg; 103 m.msg_controllen = CMSG_SPACE(sizeof(int)); 104 #ifdef __FreeBSD__ 105 m.msg_flags = 0; 106 #endif 107 108 child = fork(); 109 if (child == 0) { 110 close(s[0]); 111 112 iov.iov_base = &storage; 113 iov.iov_len = sizeof(int); 114 m.msg_iov = &iov; 115 m.msg_iovlen = 1; 116 117 if (recvmsg(s[1], &m, 0) == -1) 118 err(1, "child: could not recvmsg"); 119 120 kq = *(int *)CMSG_DATA(msg); 121 printf("child (pid %d): received kq fd %d\n", getpid(), kq); 122 exit(0); 123 } 124 125 close(s[1]); 126 127 iov.iov_base = &storage; 128 iov.iov_len = sizeof(int); 129 130 #ifdef __FreeBSD__ 131 msg = CMSG_FIRSTHDR(&m); 132 #endif 133 msg->cmsg_level = SOL_SOCKET; 134 msg->cmsg_type = SCM_RIGHTS; 135 msg->cmsg_len = CMSG_LEN(sizeof(int)); 136 137 #ifdef __NetBSD__ 138 *(int *)CMSG_DATA(msg) = kq; 139 #endif 140 141 EV_SET(&ev, 1, EVFILT_TIMER, EV_ADD|EV_ENABLE, 0, 1, 0); 142 ATF_CHECK(kevent(kq, &ev, 1, NULL, 0, NULL) != -1); 143 144 printf("parent (pid %d): sending kq fd %d\n", getpid(), kq); 145 if (sendmsg(s[0], &m, 0) == -1) { 146 ATF_REQUIRE_EQ_MSG(errno, EBADF, "errno is %d", errno); 147 atf_tc_skip("PR kern/46523"); 148 } 149 150 close(kq); 151 152 waitpid(child, &status, 0); 153 ATF_CHECK(WIFEXITED(status) && WEXITSTATUS(status)==0); 154 } 155 156 ATF_TC(kqueue_unsupported_fd); 157 ATF_TC_HEAD(kqueue_unsupported_fd, tc) 158 { 159 atf_tc_set_md_var(tc, "descr", "Checks that watching an fd whose" 160 " type is not supported does not crash the kernel"); 161 } 162 163 ATF_TC_BODY(kqueue_unsupported_fd, tc) 164 { 165 /* mqueue and semaphore use fnullop_kqueue also */ 166 int fd, kq; 167 struct kevent ev; 168 169 fd = open(DRVCTLDEV, O_RDONLY); 170 if (fd == -1) { 171 switch (errno) { 172 case ENOENT: 173 case ENXIO: 174 atf_tc_skip("no " DRVCTLDEV " available for testing"); 175 break; 176 } 177 } 178 ATF_REQUIRE(fd != -1); 179 ATF_REQUIRE((kq = kqueue()) != -1); 180 181 EV_SET(&ev, fd, EVFILT_VNODE, EV_ADD | EV_ENABLE | EV_CLEAR, 182 NOTE_DELETE|NOTE_WRITE|NOTE_EXTEND|NOTE_ATTRIB|NOTE_LINK| 183 NOTE_RENAME|NOTE_REVOKE, 0, 0); 184 185 ATF_REQUIRE(kevent(kq, &ev, 1, NULL, 0, NULL) == -1); 186 ATF_REQUIRE_ERRNO(EOPNOTSUPP, true); 187 188 (void)close(fd); 189 } 190 191 192 ATF_TP_ADD_TCS(tp) 193 { 194 195 ATF_TP_ADD_TC(tp, kevent_zerotimer); 196 ATF_TP_ADD_TC(tp, kqueue_desc_passing); 197 ATF_TP_ADD_TC(tp, kqueue_unsupported_fd); 198 199 return atf_no_error(); 200 } 201