t_kevent.c revision 1.5
1 /* $NetBSD: t_kevent.c,v 1.5 2012/11/24 15:05:45 christos 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 1.5 2012/11/24 15:05:45 christos 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 #include <sys/event.h> 47 #include <sys/time.h> 48 #include <sys/socket.h> 49 #include <sys/wait.h> 50 51 ATF_TC(kevent_zerotimer); 52 ATF_TC_HEAD(kevent_zerotimer, tc) 53 { 54 atf_tc_set_md_var(tc, "descr", "Checks that kevent with a 0 timer " 55 "does not crash the system (PR lib/45618)"); 56 } 57 58 ATF_TC_BODY(kevent_zerotimer, tc) 59 { 60 struct kevent ev; 61 int kq; 62 63 ATF_REQUIRE((kq = kqueue()) != -1); 64 EV_SET(&ev, 1, EVFILT_TIMER, EV_ADD|EV_ENABLE, 0, 1, 0); 65 ATF_REQUIRE(kevent(kq, &ev, 1, NULL, 0, NULL) != -1); 66 ATF_REQUIRE(kevent(kq, NULL, 0, &ev, 1, NULL) == 1); 67 } 68 69 ATF_TC(kqueue_desc_passing); 70 ATF_TC_HEAD(kqueue_desc_passing, tc) 71 { 72 atf_tc_set_md_var(tc, "descr", "Checks that passing a kqueue to " 73 "another process does not crash the kernel (PR 46463)"); 74 } 75 76 ATF_TC_BODY(kqueue_desc_passing, tc) 77 { 78 pid_t child; 79 int s[2], storage, status, kq; 80 struct cmsghdr *msg; 81 struct iovec iov; 82 struct msghdr m; 83 struct kevent ev; 84 85 ATF_REQUIRE((kq = kqueue()) != -1); 86 87 // atf_tc_skip("crashes kernel (PR 46463)"); 88 89 ATF_REQUIRE(socketpair(AF_LOCAL, SOCK_STREAM, 0, s) != -1); 90 msg = malloc(CMSG_SPACE(sizeof(int))); 91 m.msg_iov = &iov; 92 m.msg_iovlen = 1; 93 m.msg_name = NULL; 94 m.msg_namelen = 0; 95 m.msg_control = msg; 96 m.msg_controllen = CMSG_SPACE(sizeof(int)); 97 98 child = fork(); 99 if (child == 0) { 100 close(s[0]); 101 102 iov.iov_base = &storage; 103 iov.iov_len = sizeof(int); 104 m.msg_iov = &iov; 105 m.msg_iovlen = 1; 106 107 if (recvmsg(s[1], &m, 0) == -1) 108 err(1, "child: could not recvmsg"); 109 110 kq = *(int *)CMSG_DATA(msg); 111 printf("child (pid %d): received kq fd %d\n", getpid(), kq); 112 exit(0); 113 } 114 115 close(s[1]); 116 117 iov.iov_base = &storage; 118 iov.iov_len = sizeof(int); 119 120 msg->cmsg_level = SOL_SOCKET; 121 msg->cmsg_type = SCM_RIGHTS; 122 msg->cmsg_len = CMSG_LEN(sizeof(int)); 123 124 *(int *)CMSG_DATA(msg) = kq; 125 126 EV_SET(&ev, 1, EVFILT_TIMER, EV_ADD|EV_ENABLE, 0, 1, 0); 127 ATF_CHECK(kevent(kq, &ev, 1, NULL, 0, NULL) != -1); 128 129 printf("parent (pid %d): sending kq fd %d\n", getpid(), kq); 130 if (sendmsg(s[0], &m, 0) == -1) { 131 ATF_REQUIRE_EQ_MSG(errno, EBADF, "errno is %d", errno); 132 atf_tc_skip("PR kern/46523"); 133 } 134 135 close(kq); 136 137 waitpid(child, &status, 0); 138 ATF_CHECK(WIFEXITED(status) && WEXITSTATUS(status)==0); 139 } 140 141 ATF_TC(kqueue_unsupported_fd); 142 ATF_TC_HEAD(kqueue_unsupported_fd, tc) 143 { 144 atf_tc_set_md_var(tc, "descr", "Checks that watching an fd whose" 145 " type is not supported does not crash the kernel"); 146 } 147 148 ATF_TC_BODY(kqueue_unsupported_fd, tc) 149 { 150 /* mqueue and semaphore use fnullop_kqueue also */ 151 static const char drvctl[] = "/dev/drvctl"; 152 int fd, kq; 153 struct kevent ev; 154 155 ATF_REQUIRE((fd = open(drvctl, O_RDONLY)) != -1); 156 ATF_REQUIRE((kq = kqueue()) != -1); 157 158 EV_SET(&ev, fd, EVFILT_VNODE, EV_ADD | EV_ENABLE | EV_CLEAR, 159 NOTE_DELETE|NOTE_WRITE|NOTE_EXTEND|NOTE_ATTRIB|NOTE_LINK| 160 NOTE_RENAME|NOTE_REVOKE, 0, 0); 161 162 ATF_REQUIRE(kevent(kq, &ev, 1, NULL, 0, NULL) == -1); 163 ATF_REQUIRE_ERRNO(EOPNOTSUPP, true); 164 165 (void)close(fd); 166 } 167 168 169 ATF_TP_ADD_TCS(tp) 170 { 171 172 ATF_TP_ADD_TC(tp, kevent_zerotimer); 173 ATF_TP_ADD_TC(tp, kqueue_desc_passing); 174 ATF_TP_ADD_TC(tp, kqueue_unsupported_fd); 175 176 return atf_no_error(); 177 } 178
Indexes created Sun Sep 21 20:09:37 GMT 2025