[FFmpeg-devel] [PATCH 5/7] avcodec/anm: Check input size for a frame with just a stop code

[Michael Niedermayer]

On Fri, Aug 16, 2019 at 10:20:42PM +1000, Peter Ross wrote:
> On Thu, Aug 15, 2019 at 11:49:13PM +0200, Michael Niedermayer wrote:
> > Fixes: Timeout (11sec -> 6sec)
> > Fixes: 16344/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ANM_fuzzer-5673032000995328
> > 
> > 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/anm.c | 3 +++
> >  1 file changed, 3 insertions(+)
> > 
> > diff --git a/libavcodec/anm.c b/libavcodec/anm.c
> > index ab6a3994e9..778f38413e 100644
> > --- a/libavcodec/anm.c
> > +++ b/libavcodec/anm.c
> > @@ -119,6 +119,9 @@ static int decode_frame(AVCodecContext *avctx,
> >      uint8_t *dst, *dst_end;
> >      int count, ret;
> >  
> > +    if (buf_size < 7)
> > +        return AVERROR_INVALIDDATA;
> > +
> >      if ((ret = ff_reget_buffer(avctx, s->frame)) < 0)
> >          return ret;
> >      dst     = s->frame->data[0];
> 
> approve.

will apply

thx

[...]

-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

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