1 files changed, 236 insertions, 0 deletions

diff --git a/src/regress/lib/libc/sys/t_kevent.c b/src/regress/lib/libc/sys/t_kevent.c
new file mode 100644
index 0000000000..171e1f3dc9
--- /dev/null
+++ b/src/regress/lib/libc/sys/t_kevent.c
@@ -0,0 +1,236 @@
+/*      $OpenBSD: t_kevent.c,v 1.1 2021/09/02 12:40:44 mbuhl Exp $      */
+/*      $NetBSD: t_kevent.c,v 1.9 2020/10/31 01:08:32 christos Exp $ */
+
+/*-
+ * Copyright (c) 2011 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundatiom
+ * by Christos Zoulas.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+#include "macros.h"
+
+#include <sys/cdefs.h>
+__RCSID("$NetBSD: t_kevent.c,v 1.9 2020/10/31 01:08:32 christos Exp $");
+
+#include <sys/types.h>
+#include <sys/event.h>
+
+#include "atf-c.h"
+#include <errno.h>
+#include <time.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <err.h>
+#ifndef __OpenBSD__
+#include <sys/drvctlio.h>
+#endif
+#include <sys/event.h>
+#include <sys/time.h>
+#include <sys/socket.h>
+#include <sys/wait.h>
+
+ATF_TC(kevent_zerotimer);
+ATF_TC_HEAD(kevent_zerotimer, tc)
+{
+        atf_tc_set_md_var(tc, "descr", "Checks that kevent with a 0 timer "
+            "does not crash the system (PR lib/45618)");
+}
+
+ATF_TC_BODY(kevent_zerotimer, tc)
+{
+        struct kevent ev;
+        int kq;
+
+        ATF_REQUIRE((kq = kqueue()) != -1);
+        EV_SET(&ev, 1, EVFILT_TIMER, EV_ADD|EV_ENABLE, 0, 1, 0);
+        ATF_REQUIRE(kevent(kq, &ev, 1, NULL, 0, NULL) != -1);
+        ATF_REQUIRE(kevent(kq, NULL, 0, &ev, 1, NULL) == 1);
+}
+
+ATF_TC(kqueue_desc_passing);
+ATF_TC_HEAD(kqueue_desc_passing, tc)
+{
+        atf_tc_set_md_var(tc, "descr", "Checks that passing a kqueue to "
+                "another process does not crash the kernel (PR 46463)");
+}
+
+ATF_TC_BODY(kqueue_desc_passing, tc)
+{
+        pid_t child;
+        int s[2], storage, status, kq;
+        struct cmsghdr *msg;
+        struct iovec iov;
+        struct msghdr m;
+        struct kevent ev;
+
+        ATF_REQUIRE((kq = kqueue()) != -1);
+
+        // atf_tc_skip("crashes kernel (PR kern/46463)");
+
+        ATF_REQUIRE(socketpair(AF_LOCAL, SOCK_STREAM, 0, s) != -1);
+        msg = malloc(CMSG_SPACE(sizeof(int)));
+        m.msg_iov = &iov;
+        m.msg_iovlen = 1;
+        m.msg_name = NULL;
+        m.msg_namelen = 0;
+        m.msg_control = msg;
+        m.msg_controllen = CMSG_SPACE(sizeof(int));
+
+        child = fork();
+        if (child == 0) {
+#ifdef __OpenBSD__
+                sleep(1);
+                exit(0);
+#endif
+                close(s[0]);
+
+                iov.iov_base = &storage;
+                iov.iov_len = sizeof(int);
+                m.msg_iov = &iov;
+                m.msg_iovlen = 1;
+
+                if (recvmsg(s[1], &m, 0) == -1)
+                        err(1, "child: could not recvmsg");
+
+                kq = *(int *)CMSG_DATA(msg);
+                printf("child (pid %d): received kq fd %d\n", getpid(), kq);
+                exit(0);
+        }
+
+        close(s[1]);
+
+        iov.iov_base = &storage;
+        iov.iov_len = sizeof(int);
+
+        msg->cmsg_level = SOL_SOCKET;
+        msg->cmsg_type = SCM_RIGHTS;
+        msg->cmsg_len = CMSG_LEN(sizeof(int));
+
+        *(int *)CMSG_DATA(msg) = kq;
+
+        EV_SET(&ev, 1, EVFILT_TIMER, EV_ADD|EV_ENABLE, 0, 1, 0);
+        ATF_CHECK(kevent(kq, &ev, 1, NULL, 0, NULL) != -1);
+
+        printf("parent (pid %d): sending kq fd %d\n", getpid(), kq);
+        if (sendmsg(s[0], &m, 0) == -1) {
+#ifdef __OpenBSD__
+                ATF_REQUIRE_EQ_MSG(errno, EINVAL, "errno is %d", errno);
+#else
+                ATF_REQUIRE_EQ_MSG(errno, EBADF, "errno is %d", errno);
+                atf_tc_skip("PR kern/46523");
+#endif
+        }
+
+        close(kq);
+
+        waitpid(child, &status, 0);
+        ATF_CHECK(WIFEXITED(status) && WEXITSTATUS(status)==0);
+}
+
+#ifndef __OpenBSD__
+ATF_TC(kqueue_unsupported_fd);
+ATF_TC_HEAD(kqueue_unsupported_fd, tc)
+{
+        atf_tc_set_md_var(tc, "descr", "Checks that watching an fd whose"
+            " type is not supported does not crash the kernel");
+}
+
+ATF_TC_BODY(kqueue_unsupported_fd, tc)
+{
+        /* mqueue and semaphore use fnullop_kqueue also */
+        int fd, kq;
+        struct kevent ev;
+
+        fd = open(DRVCTLDEV, O_RDONLY);
+        if (fd == -1) {
+                switch (errno) {
+                case ENOENT:
+                case ENXIO:
+                        atf_tc_skip("no " DRVCTLDEV " available for testing");
+                        break;
+                }
+        }
+        ATF_REQUIRE(fd != -1);
+        ATF_REQUIRE((kq = kqueue()) != -1);
+
+        EV_SET(&ev, fd, EVFILT_VNODE, EV_ADD | EV_ENABLE | EV_CLEAR,
+           NOTE_DELETE|NOTE_WRITE|NOTE_EXTEND|NOTE_ATTRIB|NOTE_LINK|
+           NOTE_RENAME|NOTE_REVOKE, 0, 0);
+
+        ATF_REQUIRE(kevent(kq, &ev, 1, NULL, 0, NULL) == -1);
+        ATF_REQUIRE_ERRNO(EOPNOTSUPP, true);
+
+        (void)close(fd);
+        (void)close(kq);
+}
+
+ATF_TC(kqueue_EVFILT_USER);
+ATF_TC_HEAD(kqueue_EVFILT_USER, tc)
+{
+        atf_tc_set_md_var(tc, "descr", "Checks usability of EVFILT_USER");
+}
+
+ATF_TC_BODY(kqueue_EVFILT_USER, tc)
+{
+        /* mqueue and semaphore use fnullop_kqueue also */
+        int kq;
+        struct kevent ev, rev;
+
+        ATF_REQUIRE((kq = kqueue()) != -1);
+
+        EV_SET(&ev, 666, EVFILT_USER, EV_ADD | EV_ENABLE, 0, 0, 0);
+        ATF_REQUIRE(kevent(kq, &ev, 1, NULL, 0, NULL) == 0);
+        EV_SET(&ev, 666, EVFILT_USER, 0, NOTE_FFCOPY | NOTE_TRIGGER | 8, 0, 0);
+        ATF_REQUIRE(kevent(kq, &ev, 1, NULL, 0, NULL) == 0);
+        const struct timespec timeout = {
+                .tv_sec = 1,
+                .tv_nsec = 0,
+        };
+
+        ATF_REQUIRE(kevent(kq, NULL, 0, &rev, 1, &timeout) == 1);
+        ATF_REQUIRE(rev.ident == 666);
+        ATF_REQUIRE(rev.filter == EVFILT_USER);
+        ATF_REQUIRE(rev.fflags == 8);
+        (void)close(kq);
+}
+#endif
+
+
+
+ATF_TP_ADD_TCS(tp)
+{
+
+        ATF_TP_ADD_TC(tp, kevent_zerotimer);
+        ATF_TP_ADD_TC(tp, kqueue_desc_passing);
+#ifndef __OpenBSD__
+        ATF_TP_ADD_TC(tp, kqueue_unsupported_fd);
+        ATF_TP_ADD_TC(tp, kqueue_EVFILT_USER);
+#endif
+
+        return atf_no_error();
+}