forked from osmocom/wireshark
![João Valverde](/assets/img/avatar_default.png)
Change-Id: I68f85cdbef24289cabb5e46905356c3cc1c39ad8 Reviewed-on: https://code.wireshark.org/review/14252 Reviewed-by: João Valverde <j@v6e.pt>
254 lines
8.3 KiB
Bash
Executable file
254 lines
8.3 KiB
Bash
Executable file
#!/bin/bash
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#
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# Fuzz-testing script for TShark
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#
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# This script uses Editcap to add random errors ("fuzz") to a set of
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# capture files specified on the command line. It runs TShark on
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# each fuzzed file and checks for errors. The files are processed
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# repeatedly until an error is found.
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#
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# Copyright 2013 Gerald Combs <gerald@wireshark.org>
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#
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# Wireshark - Network traffic analyzer
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# By Gerald Combs <gerald@wireshark.org>
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# Copyright 1998 Gerald Combs
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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TEST_TYPE="fuzz"
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. `dirname $0`/test-common.sh || exit 1
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# Sanity check to make sure we can find our plugins. Zero or less disables.
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MIN_PLUGINS=0
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# Did we catch a signal?
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DONE=0
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# Perform a two pass analysis on the capture file?
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TWO_PASS=
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# Specific config profile ?
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CONFIG_PROFILE=
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# Run under valgrind ?
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VALGRIND=0
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# Run under AddressSanitizer ?
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ASAN=0
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# Don't skip any byte from being changed
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CHANGE_OFFSET=0
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# The maximum permitted amount of memory leaked. Eventually this should be
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# worked down to zero, but right now that would fail on every single capture.
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# Only has effect when running under valgrind.
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MAX_LEAK=`expr 1024 \* 100`
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# To do: add options for file names and limits
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while getopts "2b:C:d:e:agp:P:o:" OPTCHAR ; do
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case $OPTCHAR in
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a) ASAN=1 ;;
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2) TWO_PASS="-2 " ;;
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b) WIRESHARK_BIN_DIR=$OPTARG ;;
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C) CONFIG_PROFILE="-C $OPTARG " ;;
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d) TMP_DIR=$OPTARG ;;
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e) ERR_PROB=$OPTARG ;;
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g) VALGRIND=1 ;;
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p) MAX_PASSES=$OPTARG ;;
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P) MIN_PLUGINS=$OPTARG ;;
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o) CHANGE_OFFSET=$OPTARG ;;
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esac
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done
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shift $(($OPTIND - 1))
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### usually you won't have to change anything below this line ###
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ws_bind_exec_paths
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ws_check_exec "$TSHARK" "$EDITCAP" "$CAPINFOS" "$DATE" "$TMP_DIR"
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COMMON_ARGS="${CONFIG_PROFILE}${TWO_PASS}"
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if [ $VALGRIND -eq 1 ]; then
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RUNNER="`dirname $0`/valgrind-wireshark.sh"
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COMMON_ARGS="-b $WIRESHARK_BIN_DIR $COMMON_ARGS"
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declare -a RUNNER_ARGS=("" "-T")
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# Valgrind requires more resources, so permit 1.5x memory and 3x time
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# (1.5x time is too small for a few large captures in the menagerie)
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MAX_CPU_TIME=`expr 3 \* $MAX_CPU_TIME`
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MAX_VMEM=`expr 3 \* $MAX_VMEM / 2`
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else
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# Not using valgrind, use regular tshark.
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# TShark arguments (you won't have to change these)
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# n Disable network object name resolution
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# V Print a view of the details of the packet rather than a one-line summary of the packet
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# x Cause TShark to print a hex and ASCII dump of the packet data after printing the summary or details
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# r Read packet data from the following infile
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RUNNER="$TSHARK"
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declare -a RUNNER_ARGS=("-nVxr" "-nr")
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# Running with a read filter but without generating the tree exposes some
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# "More than 100000 items in tree" bugs.
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# Not sure if we want to add even more cycles to the fuzz bot's work load...
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#declare -a RUNNER_ARGS=("${CONFIG_PROFILE}${TWO_PASS}-nVxr" "${CONFIG_PROFILE}${TWO_PASS}-nr" "-Yframe ${CONFIG_PROFILE}${TWO_PASS}-nr")
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fi
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# Make sure we have a valid test set
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FOUND=0
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for CF in "$@" ; do
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if [ "$OSTYPE" == "cygwin" ] ; then
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CF=`cygpath --windows "$CF"`
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fi
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"$CAPINFOS" "$CF" > /dev/null 2>&1 && FOUND=1
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if [ $FOUND -eq 1 ] ; then break ; fi
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done
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if [ $FOUND -eq 0 ] ; then
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cat <<FIN
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Error: No valid capture files found.
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Usage: `basename $0` [-2] [-b bin_dir] [-C config_profile] [-d work_dir] [-e error probability] [-o changes offset] [-g] [-a] [-p passes] capture file 1 [capture file 2]...
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FIN
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exit 1
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fi
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PLUGIN_COUNT=`$TSHARK -G plugins | grep dissector | wc -l`
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if [ $MIN_PLUGINS -gt 0 -a $PLUGIN_COUNT -lt $MIN_PLUGINS ] ; then
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echo "Warning: Found fewer plugins than expected ($PLUGIN_COUNT vs $MIN_PLUGINS)."
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exit 1
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fi
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if [ $ASAN -ne 0 ]; then
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echo -n "ASan enabled. Virtual memory limit is "
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ulimit -v
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else
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echo "ASan disabled. Virtual memory limit is $MAX_VMEM"
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fi
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HOWMANY="forever"
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if [ $MAX_PASSES -gt 0 ]; then
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HOWMANY="$MAX_PASSES passes"
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fi
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echo -n "Running $RUNNER $COMMON_ARGS with args: "
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printf "\"%s\" " "${RUNNER_ARGS[@]}"
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echo "($HOWMANY)"
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echo ""
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# Clean up on <ctrl>C, etc
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trap "DONE=1; echo 'Caught signal'" HUP INT TERM
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# Iterate over our capture files.
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PASS=0
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while [ \( $PASS -lt $MAX_PASSES -o $MAX_PASSES -lt 1 \) -a $DONE -ne 1 ] ; do
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let PASS=$PASS+1
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echo "Starting pass $PASS:"
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RUN=0
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for CF in "$@" ; do
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if [ $DONE -eq 1 ]; then
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break # We caught a signal
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fi
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RUN=$(( $RUN + 1 ))
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if [ $(( $RUN % 50 )) -eq 0 ] ; then
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echo " [Pass $PASS]"
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fi
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if [ "$OSTYPE" == "cygwin" ] ; then
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CF=`cygpath --windows "$CF"`
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fi
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echo -n " $CF: "
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if [ $VALGRIND -eq 1 -a `ls -s $CF | cut -d' ' -f1` -gt 8000 ]; then
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echo "Too big for valgrind"
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continue
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fi
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"$CAPINFOS" "$CF" > /dev/null 2> $TMP_DIR/$ERR_FILE
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RETVAL=$?
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if [ $RETVAL -eq 1 ] ; then
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echo "Not a valid capture file"
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rm -f $TMP_DIR/$ERR_FILE
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continue
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elif [ $RETVAL -ne 0 -a $DONE -ne 1 ] ; then
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# Some other error
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ws_exit_error
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fi
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DISSECTOR_BUG=0
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VG_ERR_CNT=0
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"$EDITCAP" -E $ERR_PROB -o $CHANGE_OFFSET "$CF" $TMP_DIR/$TMP_FILE > /dev/null 2>&1
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if [ $? -ne 0 ] ; then
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"$EDITCAP" -E $ERR_PROB -o $CHANGE_OFFSET -T ether "$CF" $TMP_DIR/$TMP_FILE \
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> /dev/null 2>&1
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if [ $? -ne 0 ] ; then
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echo "Invalid format for editcap"
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continue
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fi
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fi
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for ARGS in "${RUNNER_ARGS[@]}" ; do
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if [ $DONE -eq 1 ]; then
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break # We caught a signal
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fi
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echo -n "($ARGS) "
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echo -e "Command and args: $RUNNER $ARGS\n" > $TMP_DIR/$ERR_FILE
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# Run in a child process with limits, e.g. stop it if it's running
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# longer then MAX_CPU_TIME seconds. (ulimit may not be supported
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# well on some platforms, particularly cygwin.)
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(
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ulimit -S -t $MAX_CPU_TIME -s $MAX_STACK
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ulimit -c unlimited
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# Don't enable ulimit -v when using ASAN. See
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# https://github.com/google/sanitizers/wiki/AddressSanitizer#ulimit--v
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if [ $ASAN -eq 0 ]; then
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ulimit -v $MAX_VMEM
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fi
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"$RUNNER" $COMMON_ARGS $ARGS $TMP_DIR/$TMP_FILE \
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> /dev/null 2>> $TMP_DIR/$ERR_FILE
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)
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RETVAL=$?
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# Uncomment the next two lines to enable dissector bug
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# checking.
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#grep -i "dissector bug" $TMP_DIR/$ERR_FILE \
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# > /dev/null 2>&1 && DISSECTOR_BUG=1
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if [ $VALGRIND -eq 1 -a $DONE -ne 1 ]; then
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VG_ERR_CNT=`grep "ERROR SUMMARY:" $TMP_DIR/$ERR_FILE | cut -f4 -d' '`
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VG_DEF_LEAKED=`grep "definitely lost:" $TMP_DIR/$ERR_FILE | cut -f7 -d' ' | tr -d ,`
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VG_IND_LEAKED=`grep "indirectly lost:" $TMP_DIR/$ERR_FILE | cut -f7 -d' ' | tr -d ,`
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VG_TOTAL_LEAKED=`expr $VG_DEF_LEAKED + $VG_IND_LEAKED`
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if [ $? -ne 0 ] ; then
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VG_ERR_CNT=1
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elif [ "$VG_TOTAL_LEAKED" -gt "$MAX_LEAK" ] ; then
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VG_ERR_CNT=1
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fi
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if grep -q "Valgrind cannot continue" $TMP_DIR/$ERR_FILE; then
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VG_ERR_CNT=-1
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fi
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fi
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if [ $DONE -ne 1 -a \( $RETVAL -ne 0 -o $DISSECTOR_BUG -ne 0 -o $VG_ERR_CNT -ne 0 \) ] ; then
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ws_exit_error
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fi
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done
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echo " OK"
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rm -f $TMP_DIR/$TMP_FILE $TMP_DIR/$ERR_FILE
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done
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done
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