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

[Michael Niedermayer]

On Sat, Feb 25, 2017 at 10:03:58PM +0100, Paul B Mahol wrote:
> 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

theres a

v >>= 16 - get_bits_left(&s->gb);

[...]

-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

There will always be a question for which you do not know the correct answer.
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