[FFmpeg-devel] [PATCH] avformat/aaxdec: Ask for a sample and disable COLUMN_FLAG_DEFAULT

Michael Niedermayer michael at niedermayer.cc
Wed Sep 15 00:01:18 EEST 2021


On Sat, Jul 10, 2021 at 11:26:17PM +0200, Michael Niedermayer wrote:
> The codepath repeatly seeks back to the same byte and fills the table with this
> Fixes: Timeout (reading billions of times the same byte)
> Fixes: 35510/clusterfuzz-testcase-minimized-ffmpeg_dem_AAX_fuzzer-5742289044504576
> 
> I have not found any samples in our archive or the fate samples which use this
> codepath, also i found no specification. If anyone has either please reply
> 
> Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
> Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> ---
>  libavformat/aaxdec.c | 4 ++++
>  1 file changed, 4 insertions(+)

will apply


[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

It is dangerous to be right in matters on which the established authorities
are wrong. -- Voltaire
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