[FFmpeg-devel] [PATCH 1/3] avutil/imgutils: Optimize writing 4 bytes in memset_bytes()

Michael Niedermayer michael at niedermayer.cc
Thu Dec 27 12:54:17 EET 2018

On Wed, Dec 26, 2018 at 12:30:05AM +0000, Kieran Kunhya wrote:
> On Tue, 25 Dec 2018 at 22:17 Michael Niedermayer <michael at niedermayer.cc>
> wrote:
> > Fixes: Timeout
> > Fixes:
> > 11502/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WCMV_fuzzer-5664893810769920
> > Before: Executed
> > clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WCMV_fuzzer-5664893810769920
> > in 11294 ms
> > After : Executed
> > clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WCMV_fuzzer-5664893810769920
> > in 4249 ms
> >
> So basically you go from one arbitrary timeout to another. I assume your
> fuzzer timeout is 5 or 10 seconds and so you manage to make it pass?

I think the timeout used is 25sec. I assume the server that detected it
was maybe slower than the machine i used. Its even quite possible that
variation between runs, due to hardware, load or other issues to cause
timeouts to disappear.

But none of this really should matter in the context of this patchset.
Which simply makes the code faster.


Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Many things microsoft did are stupid, but not doing something just because
microsoft did it is even more stupid. If everything ms did were stupid they
would be bankrupt already.
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