[FFmpeg-devel] [PATCH 1/5] avcodec/mpeg4videodec: Move decode_studiovisualobject() parsing in the branch for visual object parsing

[Kieran Kunhya]

On Sun, 29 Apr 2018 at 20:20 Michael Niedermayer <michael at niedermayer.cc>
wrote:

> Fixes: runtime error: shift exponent -1 is negative
> Fixes:
> 7510/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MPEG4_fuzzer-5024523356209152
>
> Found-by: continuous fuzzing process
> https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
> Signed-off-by
> <https://github.com/google/oss-fuzz/tree/master/projects/ffmpegSigned-off-by>:
> Michael Niedermayer <michael at niedermayer.cc>
>

No, this is wrong, extension_and_user_data( 0 ) may precede
StudioVisualObject.

Kieran