1 files changed, 94 insertions, 0 deletions
diff --git a/tools/test/stress2/misc/fexecve.sh b/tools/test/stress2/misc/fexecve.sh
new file mode 100755
index 000000000000..01ff0b723134
--- /dev/null
+++ b/tools/test/stress2/misc/fexecve.sh
@@ -0,0 +1,94 @@
+#!/bin/sh
+
+#
+# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+#
+# Copyright (c) 2019 Dell EMC Isilon
+#
+# 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 AUTHOR 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 AUTHOR 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.
+#
+
+# Reported by syzkaller.
+# "panic: vm_page_free_prep: page 0x61e5968 has unexpected ref_count ." seen
+# Fixed by r352748
+
+# Test scenario by: Mark Johnston <markj@freebsd.org>
+
+cat > /tmp/fexecve.c <<EOF
+#include <sys/param.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+
+#include <fcntl.h>
+#include <err.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+
+int
+main(int argc __unused, char **argv)
+{
+	char template[PATH_MAX];
+	void *addr;
+	size_t sz;
+	int fd;
+
+	sz = 16 * 4096;
+
+	(void)snprintf(template, sizeof(template), "fexecve.XXXXXX");
+	fd = mkstemp(template);
+	if (fd < 0)
+		err(1, "mkstemp");
+	if (fchmod(fd, 0700) < 0)
+		err(1, "fchmod");
+	if (ftruncate(fd, sz) < 0)
+		err(1, "ftruncate");
+
+	addr = mmap(NULL, sz, PROT_MAX(PROT_READ) | PROT_READ, MAP_SHARED,
+	    fd, 0);
+	if (addr == MAP_FAILED)
+		err(1, "mmap");
+
+	if (mlock(addr, sz) != 0)
+		err(1, "mlock");
+
+	if (ftruncate(fd, 0) != 0)
+		err(1, "ftruncate");
+	if (ftruncate(fd, sz) != 0)
+		err(1, "ftruncate");
+
+	(void)close(fd);
+
+	fd = open(template, O_EXEC);
+	if (fd < 0)
+		err(1, "open");
+	fexecve(fd, argv, NULL);
+	err(1, "fexecve");
+
+	return (0);
+}
+EOF
+cc -o /tmp/fexecve -Wall -Wextra -O2 /tmp/fexecve.c || exit 1
+echo "Expect: fexecve: fexecve: Input/output error"
+(cd /tmp; /tmp/fexecve)
+
+rm -f /tmp/fexecve /tmp/fexecve.c /tmp/fexecve.??????