forked from osmocom/wireshark
283 lines
8.1 KiB
Bash
Executable file
283 lines
8.1 KiB
Bash
Executable file
#!/bin/bash
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#
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# $Id$
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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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# This needs to point to a 'date' that supports %s.
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DATE=/bin/date
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BASE_NAME=fuzz-`$DATE +%Y-%m-%d`-$$
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# Directory containing binaries. Default current directory.
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BIN_DIR=.
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# Temporary file directory and names.
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# (had problems with this on cygwin, tried TMP_DIR=./ which worked)
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TMP_DIR=/tmp
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if [ "$OSTYPE" == "cygwin" ] ; then
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TMP_DIR=`cygpath --windows "$TMP_DIR"`
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fi
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TMP_FILE=$BASE_NAME.pcap
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ERR_FILE=$BASE_NAME.err
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# Loop this many times (< 1 loops forever)
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MAX_PASSES=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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# These may be set to your liking
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# Stop the child process if it's running longer than x seconds
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MAX_CPU_TIME=900
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# Stop the child process if it's using more than y * 1024 bytes
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MAX_VMEM=500000
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# Stop the child process if its stack is larger than than z * 1024 bytes
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# Windows XP: 2033
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# Windows 7: 2034
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# OS X 10.6: 8192
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# Linux 2.6.24: 8192
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# Solaris 10: 8192
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MAX_STACK=2033
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# Insert z times an error into the capture file (0.02 seems to be a good value to find errors)
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ERR_PROB=0.02
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# Trigger an abort if a dissector finds a bug.
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# Uncomment to enable
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# Note that if ABORT is enabled there will be no info
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# output to stderr about the DISSECTOR_BUG.
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# (There'll just be a core-dump).
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###export WIRESHARK_ABORT_ON_DISSECTOR_BUG="True"
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# To do: add options for file names and limits
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while getopts ":2b:d:e:gC:p:" OPTCHAR ; do
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case $OPTCHAR in
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2) TWO_PASS="-2 " ;;
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b) BIN_DIR=$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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esac
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done
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shift $(($OPTIND - 1))
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# Tweak the following to your liking. Editcap must support "-E".
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TSHARK="$BIN_DIR/tshark"
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EDITCAP="$BIN_DIR/editcap"
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CAPINFOS="$BIN_DIR/capinfos"
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if [ "$BIN_DIR" = "." ]; then
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export WIRESHARK_RUN_FROM_BUILD_DIRECTORY=1
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fi
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# set some limits to the child processes, e.g. stop it if it's running longer then MAX_CPU_TIME seconds
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# (ulimit is not supported well on cygwin and probably other platforms, e.g. cygwin shows some warnings)
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ulimit -S -t $MAX_CPU_TIME -v $MAX_VMEM -s $MAX_STACK
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ulimit -c unlimited
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### usually you won't have to change anything below this line ###
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if [ $VALGRIND -eq 1 ]; then
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RUNNER="$BIN_DIR/tools/valgrind-wireshark.sh"
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RUNNER_ARGS="${CONFIG_PROFILE}${TWO_PASS}"
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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="$TSHARK"
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RUNNER_ARGS="${CONFIG_PROFILE}${TWO_PASS}-nVxr"
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fi
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NOTFOUND=0
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for i in "$TSHARK" "$EDITCAP" "$CAPINFOS" "$DATE" "$TMP_DIR" ; do
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if [ ! -x $i ]; then
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echo "Couldn't find $i"
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NOTFOUND=1
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fi
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done
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if [ $NOTFOUND -eq 1 ]; then
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exit 1
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fi
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# Make sure we have a valid test set
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FOUND=0
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for CF in "$@" ; 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 $0` [-2] [-b bin_dir] [-C config_profile] [-d work_dir] [-e error probability] [-g] [-p passes] capture file 1 [capture file 2]...
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FIN
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exit 1
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fi
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DISSECTOR_PLUGINS=`$TSHARK -G plugins | grep dissector | wc -l`
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# 10 is an arbritary value.
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if [ $DISSECTOR_PLUGINS -lt 10 ] ; then
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echo "Error: Found fewer plugins than expected."
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exit 1
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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 "Running $RUNNER with args: $RUNNER_ARGS ($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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##############################################################################
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### Set up environment variables for fuzz testing ###
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##############################################################################
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# Initialize (ep_ and se_) allocated memory to 0xBADDCAFE and freed memory
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# to 0xDEADBEEF
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export WIRESHARK_DEBUG_SCRUB_MEMORY=
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# Use canaries in se_ allocations (off by default due to the memory usage)
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export WIRESHARK_DEBUG_SE_USE_CANARY=
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# Verify that ep_ and se_ allocated memory is not passed to certain routines
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# which need the memory to be persistent.
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export WIRESHARK_EP_VERIFY_POINTERS=
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export WIRESHARK_SE_VERIFY_POINTERS=
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# Turn on GLib memory debugging (since 2.13)
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export G_SLICE=debug-blocks
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# Cause glibc (Linux) to abort() if some memory errors are found
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export MALLOC_CHECK_=3
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# Cause FreeBSD (and other BSDs) to abort() on allocator warnings and
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# initialize allocated memory (to 0xa5) and freed memory (to 0x5a). see:
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# http://www.freebsd.org/cgi/man.cgi?query=malloc&apropos=0&sektion=0&manpath=FreeBSD+8.2-RELEASE&format=html
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export MALLOC_OPTIONS=AJ
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# MacOS options; see http://developer.apple.com/library/mac/releasenotes/DeveloperTools/RN-MallocOptions/_index.html
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# Initialize allocated memory to 0xAA and freed memory to 0x55
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export MallocPreScribble=1
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export MallocScribble=1
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# Add guard pages before and after large allocations
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export MallocGuardEdges=1
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# Call abort() if heap corruption is detected. Heap is checked every 1000
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# allocations (may need to be tuned!)
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export MallocCheckHeapStart=1000
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export MallocCheckHeapEach=1000
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export MallocCheckHeapAbort=1
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# Call abort() if an illegal free() call is made
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export MallocBadFreeAbort=1
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function exit_error() {
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echo -e "\n ERROR"
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echo -e "Processing failed. Capture info follows:\n"
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echo " Input file: $CF"
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if [ -d .svn ] ; then
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echo -e "\nSubversion revision" >> $TMP_DIR/$ERR_FILE
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svn log -l 1 >> $TMP_DIR/$ERR_FILE
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elif [ -d .git ] ; then
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echo -e "\nGit commit" >> $TMP_DIR/$ERR_FILE
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svn log -l 1 >> $TMP_DIR/$ERR_FILE
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fi
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echo -e "stderr follows:\n"
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cat $TMP_DIR/$ERR_FILE
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exit 1
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}
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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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PASS=`expr $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 " $CF: "
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"$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 $DONE -ne 1 ] ; then
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# Some other error
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exit_error
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fi
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DISSECTOR_BUG=0
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VG_ERR_CNT=0
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"$EDITCAP" -E $ERR_PROB "$CF" $TMP_DIR/$TMP_FILE > /dev/null 2>&1
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if [ $? -ne 0 ] ; then
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"$EDITCAP" -E $ERR_PROB -T ether "$CF" $TMP_DIR/$TMP_FILE \
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> /dev/null 2>&1
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if [ $? -ne 0 ] ; then
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echo "Invalid format for editcap"
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continue
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fi
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fi
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"$RUNNER" $RUNNER_ARGS $TMP_DIR/$TMP_FILE \
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> /dev/null 2>> $TMP_DIR/$ERR_FILE
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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 ]; then
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VG_ERR_CNT="`grep "ERROR SUMMARY:" $TMP_DIR/$ERR_FILE | cut -f4 -d' '`"
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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 [ \( $RETVAL -ne 0 -o $DISSECTOR_BUG -ne 0 -o $VG_ERR_CNT -ne 0 \) \
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-a $DONE -ne 1 ] ; then
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exit_error
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fi
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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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