[FFmpeg-devel] [PATCH 2/5] avcodec/ituh263dec: Check for the bitstream end in ff_h263_decode_mb()

[Paul B Mahol]

On 2/25/17, Michael Niedermayer <michael at niedermayer.cc> wrote:
> Fixes invalid shift
>
> Fixes: 670/clusterfuzz-testcase-4852021066727424
>
> Found-by: continuous fuzzing process
> https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
> Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> ---
>  libavcodec/ituh263dec.c | 3 +++
>  1 file changed, 3 insertions(+)
>

How this fixes invalid shift? Someone could manually add bunch of zero
bits at right place.