1 /* $OpenBSD: t_kevent.c,v 1.1 2021/09/02 12:40:44 mbuhl 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/cdefs.h> 35 __RCSID("$NetBSD: t_kevent.c,v 1.9 2020/10/31 01:08:32 christos Exp $"); 36 37 #include <sys/types.h> 38 #include <sys/event.h> 39 40 #include "atf-c.h" 41 #include <errno.h> 42 #include <time.h> 43 #include <stdio.h> 44 #include <stdlib.h> 45 #include <string.h> 46 #include <unistd.h> 47 #include <fcntl.h> 48 #include <err.h> 49 #ifndef __OpenBSD__ 50 #include <sys/drvctlio.h> 51 #endif 52 #include <sys/event.h> 53 #include <sys/time.h> 54 #include <sys/socket.h> 55 #include <sys/wait.h> 56 57 ATF_TC(kevent_zerotimer); 58 ATF_TC_HEAD(kevent_zerotimer, tc) 59 { 60 atf_tc_set_md_var(tc, "descr", "Checks that kevent with a 0 timer " 61 "does not crash the system (PR lib/45618)"); 62 } 63 64 ATF_TC_BODY(kevent_zerotimer, tc) 65 { 66 struct kevent ev; 67 int kq; 68 69 ATF_REQUIRE((kq = kqueue()) != -1); 70 EV_SET(&ev, 1, EVFILT_TIMER, EV_ADD|EV_ENABLE, 0, 1, 0); 71 ATF_REQUIRE(kevent(kq, &ev, 1, NULL, 0, NULL) != -1); 72 ATF_REQUIRE(kevent(kq, NULL, 0, &ev, 1, NULL) == 1); 73 } 74 75 ATF_TC(kqueue_desc_passing); 76 ATF_TC_HEAD(kqueue_desc_passing, tc) 77 { 78 atf_tc_set_md_var(tc, "descr", "Checks that passing a kqueue to " 79 "another process does not crash the kernel (PR 46463)"); 80 } 81 82 ATF_TC_BODY(kqueue_desc_passing, tc) 83 { 84 pid_t child; 85 int s[2], storage, status, kq; 86 struct cmsghdr *msg; 87 struct iovec iov; 88 struct msghdr m; 89 struct kevent ev; 90 91 ATF_REQUIRE((kq = kqueue()) != -1); 92 93 // atf_tc_skip("crashes kernel (PR kern/46463)"); 94 95 ATF_REQUIRE(socketpair(AF_LOCAL, SOCK_STREAM, 0, s) != -1); 96 msg = malloc(CMSG_SPACE(sizeof(int))); 97 m.msg_iov = &iov; 98 m.msg_iovlen = 1; 99 m.msg_name = NULL; 100 m.msg_namelen = 0; 101 m.msg_control = msg; 102 m.msg_controllen = CMSG_SPACE(sizeof(int)); 103 104 child = fork(); 105 if (child == 0) { 106 #ifdef __OpenBSD__ 107 sleep(1); 108 exit(0); 109 #endif 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 msg->cmsg_level = SOL_SOCKET; 131 msg->cmsg_type = SCM_RIGHTS; 132 msg->cmsg_len = CMSG_LEN(sizeof(int)); 133 134 *(int *)CMSG_DATA(msg) = kq; 135 136 EV_SET(&ev, 1, EVFILT_TIMER, EV_ADD|EV_ENABLE, 0, 1, 0); 137 ATF_CHECK(kevent(kq, &ev, 1, NULL, 0, NULL) != -1); 138 139 printf("parent (pid %d): sending kq fd %d\n", getpid(), kq); 140 if (sendmsg(s[0], &m, 0) == -1) { 141 #ifdef __OpenBSD__ 142 ATF_REQUIRE_EQ_MSG(errno, EINVAL, "errno is %d", errno); 143 #else 144 ATF_REQUIRE_EQ_MSG(errno, EBADF, "errno is %d", errno); 145 atf_tc_skip("PR kern/46523"); 146 #endif 147 } 148 149 close(kq); 150 151 waitpid(child, &status, 0); 152 ATF_CHECK(WIFEXITED(status) && WEXITSTATUS(status)==0); 153 } 154 155 #ifndef __OpenBSD__ 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 (void)close(kq); 190 } 191 192 ATF_TC(kqueue_EVFILT_USER); 193 ATF_TC_HEAD(kqueue_EVFILT_USER, tc) 194 { 195 atf_tc_set_md_var(tc, "descr", "Checks usability of EVFILT_USER"); 196 } 197 198 ATF_TC_BODY(kqueue_EVFILT_USER, tc) 199 { 200 /* mqueue and semaphore use fnullop_kqueue also */ 201 int kq; 202 struct kevent ev, rev; 203 204 ATF_REQUIRE((kq = kqueue()) != -1); 205 206 EV_SET(&ev, 666, EVFILT_USER, EV_ADD | EV_ENABLE, 0, 0, 0); 207 ATF_REQUIRE(kevent(kq, &ev, 1, NULL, 0, NULL) == 0); 208 EV_SET(&ev, 666, EVFILT_USER, 0, NOTE_FFCOPY | NOTE_TRIGGER | 8, 0, 0); 209 ATF_REQUIRE(kevent(kq, &ev, 1, NULL, 0, NULL) == 0); 210 const struct timespec timeout = { 211 .tv_sec = 1, 212 .tv_nsec = 0, 213 }; 214 215 ATF_REQUIRE(kevent(kq, NULL, 0, &rev, 1, &timeout) == 1); 216 ATF_REQUIRE(rev.ident == 666); 217 ATF_REQUIRE(rev.filter == EVFILT_USER); 218 ATF_REQUIRE(rev.fflags == 8); 219 (void)close(kq); 220 } 221 #endif 222 223 224 225 ATF_TP_ADD_TCS(tp) 226 { 227 228 ATF_TP_ADD_TC(tp, kevent_zerotimer); 229 ATF_TP_ADD_TC(tp, kqueue_desc_passing); 230 #ifndef __OpenBSD__ 231 ATF_TP_ADD_TC(tp, kqueue_unsupported_fd); 232 ATF_TP_ADD_TC(tp, kqueue_EVFILT_USER); 233 #endif 234 235 return atf_no_error(); 236 } 237