On Mon, Mar 13, 2017 at 09:51:40AM +0100, Paul B Mahol wrote: > On 3/13/17, Michael Niedermayer <mich...@niedermayer.cc> wrote: > > Benchmarks with START_TIMER indicate that the code is faster with unsigned, > > (that is > > with the patch), there was quite some fluctuation in the numbers so this may > > be just > > random > > > > Fixes: 811/clusterfuzz-testcase-6465493076541440 > > > > Found-by: continuous fuzzing process > > https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg > > Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > > --- > > libavcodec/simple_idct_template.c | 36 ++++++++++++++++++------------------ > > 1 file changed, 18 insertions(+), 18 deletions(-) > > > > So this fixes remote code execution?
It fixes integer overflows which are undefined behavior, i very much doubt this allows any RCE in practive anywhere but strictly speaking undefined means anything can happen > > Please state what commit fixes. Please see the first line of the commit message, which git puts in the subject of the mail: Subject: Re: [FFmpeg-devel] [PATCH 3/4] avcodec/simple_idct_template: Fix several integer overflows [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB Concerning the gods, I have no means of knowing whether they exist or not or of what sort they may be, because of the obscurity of the subject, and the brevity of human life -- Protagoras
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