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      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 #
     30 getrint() {
     31 	echo $(od -An -N2 -i /dev/urandom | sed 's/ //')
     32 }
     33 
     34 getrstr() {
     35 	echo $(cat /dev/urandom | head -n 1 | base64)
     36 }
     37 
     38 write_garbage() {
     39 	val=$(getrint)
     40 	echo "Test $3: write to $1 opt $2 -> $val"
     41 	ifconfig $1 $2 $val >/dev/null 2>&1
     42 	val=$(getrstr)
     43 	echo "Test $3: write to $1 opt $2 -> $val"
     44 	ifconfig $1 $2 $val >/dev/null 2>&1
     45 }
     46 
     47 atf_test_case random_garbage
     48 random_garbage_head() {
     49 	atf_set "require.user" "root"
     50 	atf_set "descr" "Test writing random garbage to " \
     51 		"ifconfig(8) options (PR kern/55451)"
     52 }
     53 
     54 random_garbage_body() {
     55 
     56 	# Please note:
     57 	#
     58 	# 1. As some drivers seem to have input validation issues, it may
     59 	#    be possible that horrors are written directly to the hardware.
     60 	#
     61 	# 2. Even if the test passes, there is no easy way to restore
     62 	#    the existing state/configuration of any given interface.
     63 	#
     64 	# Take care.
     65 	#
     66 	if ! [ $(atf_config_get "run_unsafe" "no") = "yes" ]; then
     67 		atf_skip "The test is not safe (PR kern/55451)"
     68 	fi
     69 
     70 	opts="advbase advskew broadcast carpdev description \
     71 	      media mediaopt -mediaopt mode instance metric mtu \
     72 	      netmask state frag rts ssid nwid nwkey pass powersavesleep \
     73 	      bssid chan tunnel session cookie pltime prefixlen linkstr \
     74 	      vhid vlan vlanif -vlanif agrport -agrport vltime maxupd \
     75 	      syncdev syncpeer"
     76 
     77 	for i in $(ifconfig -l); do
     78 
     79 		ifconfig $i up
     80 
     81 		for o in $opts; do
     82 
     83 			n=10
     84 
     85 			while [ $n -gt 0 ]; do
     86 				write_garbage $i $o $n
     87 				n=$(expr $n - 1)
     88 			done
     89 		done
     90 	done
     91 
     92 	atf_pass
     93 }
     94 
     95 atf_init_test_cases() {
     96 	atf_add_test_case random_garbage
     97 }
     98