[FFmpeg-devel] [PATCH 1/6] avcodec/utils: allocate a line more for VC1 and WMV3

Michael Niedermayer michael at niedermayer.cc
Fri Feb 24 00:26:01 EET 2023

On Wed, Jan 11, 2023 at 09:42:16PM +0100, Michael Niedermayer wrote:
> Fixes: out of array read on 32bit
> Fixes: 54857/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_VC1_fuzzer-5840588224462848
> The chroma MC code reads over the currently allocated frame.
> Alternative fixes would be allocating a few bytes more at the end instead of a whole
> line extra or to adjust the threshold where the edge emu code is activated
> Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
> Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> ---
>  libavcodec/utils.c | 1 +
>  1 file changed, 1 insertion(+)

will apply remaining bits of this patchset

Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

The misfortune of the wise is better than the prosperity of the fool.
-- Epicurus
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