287 lines
9.4 KiB
Bash
Executable File
287 lines
9.4 KiB
Bash
Executable File
#!/bin/bash
|
|
#
|
|
# Fuzz-testing script for TShark
|
|
#
|
|
# This script uses Editcap to add random errors ("fuzz") to a set of
|
|
# capture files specified on the command line. It runs TShark on
|
|
# each fuzzed file and checks for errors. The files are processed
|
|
# repeatedly until an error is found.
|
|
#
|
|
# Copyright 2013 Gerald Combs <gerald@wireshark.org>
|
|
#
|
|
# Wireshark - Network traffic analyzer
|
|
# By Gerald Combs <gerald@wireshark.org>
|
|
# Copyright 1998 Gerald Combs
|
|
#
|
|
# SPDX-License-Identifier: GPL-2.0-or-later
|
|
|
|
TEST_TYPE="fuzz"
|
|
# shellcheck source=tools/test-common.sh
|
|
. "$( dirname "$0" )"/test-common.sh || exit 1
|
|
|
|
# Sanity check to make sure we can find our plugins. Zero or less disables.
|
|
MIN_PLUGINS=0
|
|
|
|
# Did we catch a signal?
|
|
DONE=0
|
|
|
|
# Currently running children
|
|
RUNNER_PIDS=
|
|
|
|
# Perform a two pass analysis on the capture file?
|
|
TWO_PASS=
|
|
|
|
# Specific config profile ?
|
|
CONFIG_PROFILE=
|
|
|
|
# Run under valgrind ?
|
|
VALGRIND=0
|
|
|
|
# Run under AddressSanitizer ?
|
|
ASAN=$CONFIGURED_WITH_ASAN
|
|
|
|
# Don't skip any byte from being changed
|
|
CHANGE_OFFSET=0
|
|
|
|
# The maximum permitted amount of memory leaked. Eventually this should be
|
|
# worked down to zero, but right now that would fail on every single capture.
|
|
# Only has effect when running under valgrind.
|
|
MAX_LEAK=$(( 1024 * 100 ))
|
|
|
|
# To do: add options for file names and limits
|
|
while getopts "2b:C:d:e:agp:P:o:" OPTCHAR ; do
|
|
case $OPTCHAR in
|
|
a) ASAN=1 ;;
|
|
2) TWO_PASS="-2 " ;;
|
|
b) WIRESHARK_BIN_DIR=$OPTARG ;;
|
|
C) CONFIG_PROFILE="-C $OPTARG " ;;
|
|
d) TMP_DIR=$OPTARG ;;
|
|
e) ERR_PROB=$OPTARG ;;
|
|
g) VALGRIND=1 ;;
|
|
p) MAX_PASSES=$OPTARG ;;
|
|
P) MIN_PLUGINS=$OPTARG ;;
|
|
o) CHANGE_OFFSET=$OPTARG ;;
|
|
*) printf "Unknown option %s" "$OPTCHAR"
|
|
esac
|
|
done
|
|
shift $((OPTIND - 1))
|
|
|
|
### usually you won't have to change anything below this line ###
|
|
|
|
ws_bind_exec_paths
|
|
ws_check_exec "$TSHARK" "$EDITCAP" "$CAPINFOS" "$DATE" "$TMP_DIR"
|
|
|
|
COMMON_ARGS="${CONFIG_PROFILE}${TWO_PASS}"
|
|
KEEP=
|
|
PACKET_RANGE=
|
|
if [ $VALGRIND -eq 1 ]; then
|
|
RUNNER=$( dirname "$0" )"/valgrind-wireshark.sh"
|
|
COMMON_ARGS="-b $WIRESHARK_BIN_DIR $COMMON_ARGS"
|
|
declare -a RUNNER_ARGS=("" "-T")
|
|
# Valgrind requires more resources, so permit 1.5x memory and 3x time
|
|
# (1.5x time is too small for a few large captures in the menagerie)
|
|
MAX_CPU_TIME=$(( 3 * MAX_CPU_TIME ))
|
|
MAX_VMEM=$(( 3 * MAX_VMEM / 2 ))
|
|
# Valgrind is slow. Trim captures to the first 10k packets so that
|
|
# we don't time out.
|
|
KEEP=-r
|
|
PACKET_RANGE=1-10000
|
|
else
|
|
# Not using valgrind, use regular tshark.
|
|
# TShark arguments (you won't have to change these)
|
|
# n Disable network object name resolution
|
|
# V Print a view of the details of the packet rather than a one-line summary of the packet
|
|
# x Cause TShark to print a hex and ASCII dump of the packet data after printing the summary or details
|
|
# r Read packet data from the following infile
|
|
RUNNER="$TSHARK"
|
|
declare -a RUNNER_ARGS=("-nVxr" "-nr")
|
|
# Running with a read filter but without generating the tree exposes some
|
|
# "More than 100000 items in tree" bugs.
|
|
# Not sure if we want to add even more cycles to the fuzz bot's work load...
|
|
#declare -a RUNNER_ARGS=("${CONFIG_PROFILE}${TWO_PASS}-nVxr" "${CONFIG_PROFILE}${TWO_PASS}-nr" "-Yframe ${CONFIG_PROFILE}${TWO_PASS}-nr")
|
|
fi
|
|
|
|
|
|
# Make sure we have a valid test set
|
|
FOUND=0
|
|
for CF in "$@" ; do
|
|
if [ "$OSTYPE" == "cygwin" ] ; then
|
|
CF=$( cygpath --windows "$CF" )
|
|
fi
|
|
"$CAPINFOS" "$CF" > /dev/null 2>&1 && FOUND=1
|
|
if [ $FOUND -eq 1 ] ; then break ; fi
|
|
done
|
|
|
|
if [ $FOUND -eq 0 ] ; then
|
|
cat <<FIN
|
|
Error: No valid capture files found.
|
|
|
|
Usage: $( basename "$0" ) [-2] [-b bin_dir] [-C config_profile] [-d work_dir] [-e error probability] [-o changes offset] [-g] [-a] [-p passes] capture file 1 [capture file 2]...
|
|
FIN
|
|
exit 1
|
|
fi
|
|
|
|
PLUGIN_COUNT=$( $TSHARK -G plugins | grep -c dissector )
|
|
if [ "$MIN_PLUGINS" -gt 0 ] && [ "$PLUGIN_COUNT" -lt "$MIN_PLUGINS" ] ; then
|
|
echo "Warning: Found fewer plugins than expected ($PLUGIN_COUNT vs $MIN_PLUGINS)."
|
|
exit 1
|
|
fi
|
|
|
|
if [ $ASAN -ne 0 ]; then
|
|
echo -n "ASan enabled. Virtual memory limit is "
|
|
ulimit -v
|
|
else
|
|
echo "ASan disabled. Virtual memory limit is $MAX_VMEM"
|
|
fi
|
|
|
|
HOWMANY="forever"
|
|
if [ "$MAX_PASSES" -gt 0 ]; then
|
|
HOWMANY="$MAX_PASSES passes"
|
|
fi
|
|
echo -n "Running $RUNNER $COMMON_ARGS with args: "
|
|
printf "\"%s\" " "${RUNNER_ARGS[@]}"
|
|
echo "($HOWMANY)"
|
|
echo ""
|
|
|
|
# Clean up on <ctrl>C, etc
|
|
trap_all() {
|
|
DONE=1
|
|
echo 'Caught signal'
|
|
}
|
|
|
|
trap_abrt() {
|
|
for RUNNER_PID in $RUNNER_PIDS ; do
|
|
kill -ABRT $RUNNER_PID
|
|
done
|
|
trap_all
|
|
}
|
|
|
|
trap trap_all HUP INT TERM
|
|
trap trap_abrt ABRT
|
|
|
|
# Iterate over our capture files.
|
|
PASS=0
|
|
while { [ $PASS -lt "$MAX_PASSES" ] || [ "$MAX_PASSES" -lt 1 ]; } && [ $DONE -ne 1 ] ; do
|
|
PASS=$(( PASS+1 ))
|
|
echo "Starting pass $PASS:"
|
|
RUN=0
|
|
|
|
for CF in "$@" ; do
|
|
if [ $DONE -eq 1 ]; then
|
|
break # We caught a signal
|
|
fi
|
|
RUN=$(( RUN + 1 ))
|
|
if [ $(( RUN % 50 )) -eq 0 ] ; then
|
|
echo " [Pass $PASS]"
|
|
fi
|
|
if [ "$OSTYPE" == "cygwin" ] ; then
|
|
CF=$( cygpath --windows "$CF" )
|
|
fi
|
|
echo -n " $CF: "
|
|
|
|
"$CAPINFOS" "$CF" > /dev/null 2> "$TMP_DIR/$ERR_FILE"
|
|
RETVAL=$?
|
|
if [ $RETVAL -eq 1 ] || [ $RETVAL -eq 2 ] ; then
|
|
echo "Not a valid capture file"
|
|
rm -f "$TMP_DIR/$ERR_FILE"
|
|
continue
|
|
elif [ $RETVAL -ne 0 ] && [ $DONE -ne 1 ] ; then
|
|
# Some other error
|
|
ws_exit_error
|
|
fi
|
|
|
|
DISSECTOR_BUG=0
|
|
VG_ERR_CNT=0
|
|
|
|
"$EDITCAP" -E "$ERR_PROB" -o "$CHANGE_OFFSET" $KEEP "$CF" "$TMP_DIR/$TMP_FILE" $PACKET_RANGE > /dev/null 2>&1
|
|
RETVAL=$?
|
|
if [ $RETVAL -ne 0 ] ; then
|
|
"$EDITCAP" -E "$ERR_PROB" -o "$CHANGE_OFFSET" $KEEP -T ether "$CF" "$TMP_DIR/$TMP_FILE" $PACKET_RANGE \
|
|
> /dev/null 2>&1
|
|
RETVAL=$?
|
|
if [ $RETVAL -ne 0 ] ; then
|
|
echo "Invalid format for editcap"
|
|
continue
|
|
fi
|
|
fi
|
|
|
|
RUNNER_PIDS=
|
|
RUNNER_ERR_FILES=
|
|
for ARGS in "${RUNNER_ARGS[@]}" ; do
|
|
if [ $DONE -eq 1 ]; then
|
|
break # We caught a signal
|
|
fi
|
|
echo -n "($ARGS) "
|
|
|
|
# Run in a child process with limits.
|
|
(
|
|
# Set some limits to the child processes, e.g. stop it if
|
|
# it's running longer than MAX_CPU_TIME seconds. (ulimit
|
|
# is not supported well on cygwin - it shows some warnings -
|
|
# and the features we use may not all be supported on some
|
|
# UN*X platforms.)
|
|
ulimit -S -t "$MAX_CPU_TIME" -s "$MAX_STACK"
|
|
|
|
# Allow core files to be generated
|
|
ulimit -c unlimited
|
|
|
|
# Don't enable ulimit -v when using ASAN. See
|
|
# https://github.com/google/sanitizers/wiki/AddressSanitizer#ulimit--v
|
|
if [ $ASAN -eq 0 ]; then
|
|
ulimit -S -v "$MAX_VMEM"
|
|
fi
|
|
|
|
# shellcheck disable=SC2016
|
|
SUBSHELL_PID=$($SHELL -c 'echo $PPID')
|
|
|
|
printf 'Command and args: %s %s %s\n' "$RUNNER" "$COMMON_ARGS" "$ARGS" > "$TMP_DIR/$ERR_FILE.$SUBSHELL_PID"
|
|
# shellcheck disable=SC2086
|
|
"$RUNNER" $COMMON_ARGS $ARGS "$TMP_DIR/$TMP_FILE" \
|
|
> /dev/null 2>> "$TMP_DIR/$ERR_FILE.$SUBSHELL_PID"
|
|
) &
|
|
RUNNER_PID=$!
|
|
RUNNER_PIDS="$RUNNER_PIDS $RUNNER_PID"
|
|
RUNNER_ERR_FILES="$RUNNER_ERR_FILES $TMP_DIR/$ERR_FILE.$RUNNER_PID"
|
|
done
|
|
|
|
for RUNNER_PID in $RUNNER_PIDS ; do
|
|
wait "$RUNNER_PID"
|
|
RUNNER_RETVAL=$?
|
|
mv "$TMP_DIR/$ERR_FILE.$RUNNER_PID" "$TMP_DIR/$ERR_FILE"
|
|
|
|
# Uncomment the next two lines to enable dissector bug
|
|
# checking.
|
|
#grep -i "dissector bug" $TMP_DIR/$ERR_FILE \
|
|
# > /dev/null 2>&1 && DISSECTOR_BUG=1
|
|
|
|
if [ $VALGRIND -eq 1 ] && [ $DONE -ne 1 ]; then
|
|
VG_ERR_CNT=$( grep "ERROR SUMMARY:" "$TMP_DIR/$ERR_FILE" | cut -f4 -d' ' )
|
|
VG_DEF_LEAKED=$( grep "definitely lost:" "$TMP_DIR/$ERR_FILE" | cut -f7 -d' ' | tr -d , )
|
|
VG_IND_LEAKED=$( grep "indirectly lost:" "$TMP_DIR/$ERR_FILE" | cut -f7 -d' ' | tr -d , )
|
|
VG_TOTAL_LEAKED=$(( VG_DEF_LEAKED + VG_IND_LEAKED ))
|
|
if [ $RUNNER_RETVAL -ne 0 ] ; then
|
|
echo "General Valgrind failure."
|
|
VG_ERR_CNT=1
|
|
elif [ "$VG_TOTAL_LEAKED" -gt "$MAX_LEAK" ] ; then
|
|
echo "Definitely + indirectly ($VG_DEF_LEAKED + $VG_IND_LEAKED) exceeds max ($MAX_LEAK)."
|
|
echo "Definitely + indirectly ($VG_DEF_LEAKED + $VG_IND_LEAKED) exceeds max ($MAX_LEAK)." >> "$TMP_DIR/$ERR_FILE"
|
|
VG_ERR_CNT=1
|
|
fi
|
|
if grep -q "Valgrind cannot continue" "$TMP_DIR/$ERR_FILE" ; then
|
|
echo "Valgrind unable to continue."
|
|
VG_ERR_CNT=-1
|
|
fi
|
|
fi
|
|
|
|
if [ $DONE -ne 1 ] && { [ $RUNNER_RETVAL -ne 0 ] || [ $DISSECTOR_BUG -ne 0 ] || [ $VG_ERR_CNT -ne 0 ]; } ; then
|
|
# shellcheck disable=SC2086
|
|
rm -f $RUNNER_ERR_FILES
|
|
ws_exit_error
|
|
fi
|
|
done
|
|
|
|
echo " OK"
|
|
rm -f "$TMP_DIR/$TMP_FILE" "$TMP_DIR/$ERR_FILE"
|
|
done
|
|
done
|