# $NetBSD: t_random_garbage.sh,v 1.4 2020/07/27 07:36:19 jruoho Exp $ # # Copyright (c) 2020 The NetBSD Foundation, Inc. # All rights reserved. # # This code is derived from software contributed to The NetBSD Foundation # by Jukka Ruohonen. # # 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. # tmp="/tmp/sysctl.out" getrint() { echo $(od -An -N2 -i /dev/urandom | sed 's/ //') } getrstr() { echo $(cat /dev/urandom | head -n 1 | base64) } atf_test_case random_garbage cleanup random_garbage_head() { sysctl -a > $tmp atf_set "require.user" "root" atf_set "descr" "Test writing random garbage " \ "to sysctl nodes (PR kern/55451)" } random_garbage_body() { if ! [ $(atf_config_get "run_unsafe" "no") = "yes" ]; then atf_skip "The test is not safe (PR kern/55451)" fi while read line; do var=$(echo $line | awk '{print $1}') case $var in hw.acpi.sleep.state) echo "Skipping $var" continue ;; kern.securelevel*) echo "Skipping $var" continue ;; kern.veriexec.strict) echo "Skipping $var" continue ;; security*) echo "Skipping $var" continue ;; esac val=$(getrint) echo "Write $var -> $val" sysctl -w $var=$val val=$(getrstr) echo "Write $var -> $val" sysctl -w $var=$val done < $tmp } random_garbage_cleanup() { if ! [ $(atf_config_get "run_unsafe" "no") = "yes" ]; then atf_skip "The test is not safe (PR kern/55451)" fi while read line; do var=$(echo $line | awk '{print $1}') val=$(echo $line | awk '{print $3}') echo "Restoring $var -> $val" sysctl -w $var=$val > /dev/null 2>&1 done < $tmp rm $tmp } atf_init_test_cases() { atf_add_test_case random_garbage }