1# $NetBSD: t_random_garbage.sh,v 1.4 2020/07/27 07:36:19 jruoho Exp $ 2# 3# Copyright (c) 2020 The NetBSD Foundation, Inc. 4# All rights reserved. 5# 6# This code is derived from software contributed to The NetBSD Foundation 7# by Jukka Ruohonen. 8# 9# Redistribution and use in source and binary forms, with or without 10# modification, are permitted provided that the following conditions 11# are met: 12# 1. Redistributions of source code must retain the above copyright 13# notice, this list of conditions and the following disclaimer. 14# 2. Redistributions in binary form must reproduce the above copyright 15# notice, this list of conditions and the following disclaimer in the 16# documentation and/or other materials provided with the distribution. 17# 18# THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 19# ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 20# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 22# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28# POSSIBILITY OF SUCH DAMAGE. 29# 30tmp="/tmp/sysctl.out" 31 32getrint() { 33 echo $(od -An -N2 -i /dev/urandom | sed 's/ //') 34} 35 36getrstr() { 37 echo $(cat /dev/urandom | head -n 1 | base64) 38} 39 40atf_test_case random_garbage cleanup 41random_garbage_head() { 42 sysctl -a > $tmp 43 atf_set "require.user" "root" 44 atf_set "descr" "Test writing random garbage " \ 45 "to sysctl nodes (PR kern/55451)" 46} 47 48random_garbage_body() { 49 50 if ! [ $(atf_config_get "run_unsafe" "no") = "yes" ]; then 51 atf_skip "The test is not safe (PR kern/55451)" 52 fi 53 54 while read line; do 55 56 var=$(echo $line | awk '{print $1}') 57 58 case $var in 59 hw.acpi.sleep.state) 60 echo "Skipping $var" 61 continue 62 ;; 63 64 kern.securelevel*) 65 echo "Skipping $var" 66 continue 67 ;; 68 69 kern.veriexec.strict) 70 echo "Skipping $var" 71 continue 72 ;; 73 74 security*) 75 echo "Skipping $var" 76 continue 77 ;; 78 esac 79 80 val=$(getrint) 81 echo "Write $var -> $val" 82 sysctl -w $var=$val 83 val=$(getrstr) 84 echo "Write $var -> $val" 85 sysctl -w $var=$val 86 87 done < $tmp 88} 89 90random_garbage_cleanup() { 91 92 if ! [ $(atf_config_get "run_unsafe" "no") = "yes" ]; then 93 atf_skip "The test is not safe (PR kern/55451)" 94 fi 95 96 while read line; do 97 var=$(echo $line | awk '{print $1}') 98 val=$(echo $line | awk '{print $3}') 99 echo "Restoring $var -> $val" 100 sysctl -w $var=$val > /dev/null 2>&1 101 done < $tmp 102 103 rm $tmp 104} 105 106atf_init_test_cases() { 107 atf_add_test_case random_garbage 108} 109