1 /* $OpenBSD: t_kevent.c,v 1.3 2023/04/19 12:58:15 jsg Exp $ */ 2 /* $NetBSD: t_kevent.c,v 1.9 2020/10/31 01:08:32 christos Exp $ */ 3 4 /*- 5 * Copyright (c) 2011 The NetBSD Foundation, Inc. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to The NetBSD Foundatiom 9 * by Christos Zoulas. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 #include "macros.h" 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 #ifndef __OpenBSD__ 47 #include <sys/drvctlio.h> 48 #endif 49 #include <sys/time.h> 50 #include <sys/socket.h> 51 #include <sys/wait.h> 52 53 ATF_TC(kevent_zerotimer); 54 ATF_TC_HEAD(kevent_zerotimer, tc) 55 { 56 atf_tc_set_md_var(tc, "descr", "Checks that kevent with a 0 timer " 57 "does not crash the system (PR lib/45618)"); 58 } 59 60 ATF_TC_BODY(kevent_zerotimer, tc) 61 { 62 struct kevent ev; 63 int kq; 64 65 ATF_REQUIRE((kq = kqueue()) != -1); 66 EV_SET(&ev, 1, EVFILT_TIMER, EV_ADD|EV_ENABLE, 0, 1, 0); 67 ATF_REQUIRE(kevent(kq, &ev, 1, NULL, 0, NULL) != -1); 68 ATF_REQUIRE(kevent(kq, NULL, 0, &ev, 1, NULL) == 1); 69 } 70 71 ATF_TC(kqueue_desc_passing); 72 ATF_TC_HEAD(kqueue_desc_passing, tc) 73 { 74 atf_tc_set_md_var(tc, "descr", "Checks that passing a kqueue to " 75 "another process does not crash the kernel (PR 46463)"); 76 } 77 78 ATF_TC_BODY(kqueue_desc_passing, tc) 79 { 80 pid_t child; 81 int s[2], storage, status, kq; 82 struct cmsghdr *msg; 83 struct iovec iov; 84 struct msghdr m; 85 struct kevent ev; 86 87 ATF_REQUIRE((kq = kqueue()) != -1); 88 89 // atf_tc_skip("crashes kernel (PR kern/46463)"); 90 91 ATF_REQUIRE(socketpair(AF_LOCAL, SOCK_STREAM, 0, s) != -1); 92 msg = malloc(CMSG_SPACE(sizeof(int))); 93 m.msg_iov = &iov; 94 m.msg_iovlen = 1; 95 m.msg_name = NULL; 96 m.msg_namelen = 0; 97 m.msg_control = msg; 98 m.msg_controllen = CMSG_SPACE(sizeof(int)); 99 100 child = fork(); 101 if (child == 0) { 102 #ifdef __OpenBSD__ 103 sleep(1); 104 exit(0); 105 #endif 106 close(s[0]); 107 108 iov.iov_base = &storage; 109 iov.iov_len = sizeof(int); 110 m.msg_iov = &iov; 111 m.msg_iovlen = 1; 112 113 if (recvmsg(s[1], &m, 0) == -1) 114 err(1, "child: could not recvmsg"); 115 116 kq = *(int *)CMSG_DATA(msg); 117 printf("child (pid %d): received kq fd %d\n", getpid(), kq); 118 exit(0); 119 } 120 121 close(s[1]); 122 123 iov.iov_base = &storage; 124 iov.iov_len = sizeof(int); 125 126 msg->cmsg_level = SOL_SOCKET; 127 msg->cmsg_type = SCM_RIGHTS; 128 msg->cmsg_len = CMSG_LEN(sizeof(int)); 129 130 *(int *)CMSG_DATA(msg) = kq; 131 132 EV_SET(&ev, 1, EVFILT_TIMER, EV_ADD|EV_ENABLE, 0, 1, 0); 133 ATF_CHECK(kevent(kq, &ev, 1, NULL, 0, NULL) != -1); 134 135 printf("parent (pid %d): sending kq fd %d\n", getpid(), kq); 136 if (sendmsg(s[0], &m, 0) == -1) { 137 #ifdef __OpenBSD__ 138 ATF_REQUIRE_EQ_MSG(errno, EINVAL, "errno is %d", errno); 139 #else 140 ATF_REQUIRE_EQ_MSG(errno, EBADF, "errno is %d", errno); 141 atf_tc_skip("PR kern/46523"); 142 #endif 143 } 144 145 close(kq); 146 147 waitpid(child, &status, 0); 148 ATF_CHECK(WIFEXITED(status) && WEXITSTATUS(status)==0); 149 } 150 151 #ifndef __OpenBSD__ 152 ATF_TC(kqueue_unsupported_fd); 153 ATF_TC_HEAD(kqueue_unsupported_fd, tc) 154 { 155 atf_tc_set_md_var(tc, "descr", "Checks that watching an fd whose" 156 " type is not supported does not crash the kernel"); 157 } 158 159 ATF_TC_BODY(kqueue_unsupported_fd, tc) 160 { 161 /* mqueue and semaphore use fnullop_kqueue also */ 162 int fd, kq; 163 struct kevent ev; 164 165 fd = open(DRVCTLDEV, O_RDONLY); 166 if (fd == -1) { 167 switch (errno) { 168 case ENOENT: 169 case ENXIO: 170 atf_tc_skip("no " DRVCTLDEV " available for testing"); 171 break; 172 } 173 } 174 ATF_REQUIRE(fd != -1); 175 ATF_REQUIRE((kq = kqueue()) != -1); 176 177 EV_SET(&ev, fd, EVFILT_VNODE, EV_ADD | EV_ENABLE | EV_CLEAR, 178 NOTE_DELETE|NOTE_WRITE|NOTE_EXTEND|NOTE_ATTRIB|NOTE_LINK| 179 NOTE_RENAME|NOTE_REVOKE, 0, 0); 180 181 ATF_REQUIRE(kevent(kq, &ev, 1, NULL, 0, NULL) == -1); 182 ATF_REQUIRE_ERRNO(EOPNOTSUPP, true); 183 184 (void)close(fd); 185 (void)close(kq); 186 } 187 188 ATF_TC(kqueue_EVFILT_USER); 189 ATF_TC_HEAD(kqueue_EVFILT_USER, tc) 190 { 191 atf_tc_set_md_var(tc, "descr", "Checks usability of EVFILT_USER"); 192 } 193 194 ATF_TC_BODY(kqueue_EVFILT_USER, tc) 195 { 196 /* mqueue and semaphore use fnullop_kqueue also */ 197 int kq; 198 struct kevent ev, rev; 199 200 ATF_REQUIRE((kq = kqueue()) != -1); 201 202 EV_SET(&ev, 666, EVFILT_USER, EV_ADD | EV_ENABLE, 0, 0, 0); 203 ATF_REQUIRE(kevent(kq, &ev, 1, NULL, 0, NULL) == 0); 204 EV_SET(&ev, 666, EVFILT_USER, 0, NOTE_FFCOPY | NOTE_TRIGGER | 8, 0, 0); 205 ATF_REQUIRE(kevent(kq, &ev, 1, NULL, 0, NULL) == 0); 206 const struct timespec timeout = { 207 .tv_sec = 1, 208 .tv_nsec = 0, 209 }; 210 211 ATF_REQUIRE(kevent(kq, NULL, 0, &rev, 1, &timeout) == 1); 212 ATF_REQUIRE(rev.ident == 666); 213 ATF_REQUIRE(rev.filter == EVFILT_USER); 214 ATF_REQUIRE(rev.fflags == 8); 215 (void)close(kq); 216 } 217 #endif 218 219 220 221 ATF_TP_ADD_TCS(tp) 222 { 223 224 ATF_TP_ADD_TC(tp, kevent_zerotimer); 225 ATF_TP_ADD_TC(tp, kqueue_desc_passing); 226 #ifndef __OpenBSD__ 227 ATF_TP_ADD_TC(tp, kqueue_unsupported_fd); 228 ATF_TP_ADD_TC(tp, kqueue_EVFILT_USER); 229 #endif 230 231 return atf_no_error(); 232 } 233