Date: Fri, 7 Nov 2014 16:58:44 +0100 From: Robert Święcki <robert@...ecki.net> To: oss-security@...ts.openwall.com Cc: Alexander Cherepanov <cherepan@...me.ru>, binutils@...rceware.org Subject: Re: Re: Fuzzing objdump (PR 17512) and readelf (PR 17531) 2014-11-07 11:08 GMT+01:00 Yury Gribov <y.gribov@...sung.com>: > On 11/07/2014 07:43 AM, Alexander Cherepanov wrote: >> >> Longer version: I started with the most simple approach I could get >> results with and improved it only a little bit so far. There was just no >> need for improvements -- until recently I was getting more crashes than >> I can analyze (i.e. run through valgrind:-). > > > This looks rather impressive. Have you considered automatically detecting > duplicates by e.g. analyzing stacktraces? Feel free to take a look at honggfuzz - https://code.google.com/p/honggfuzz/ It provides a crude version of unification on the basis of offending program counter (as well as simple disassembly of the offending instruction). It also disables address randomization to get repeatable crashes. Example output (from testing strings-multiarch): http://alt.swiecki.net/.t/strings-multiarch.txt Usage: honggfuzz -f in/ -r 0.1 -q -- /usr/bin/strings ___FILE___ -- Robert Święcki
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