[FFmpeg-devel] [PATCH] avcodec/jvdec: Check available input space before decode8x8()

[Michael Niedermayer]

On Thu, Feb 21, 2019 at 12:13:50PM +0100, Paul B Mahol wrote:
> On 2/21/19, Michael Niedermayer <michael at niedermayer.cc> wrote:
> > Fixes: Timeout (78 sec -> 15 millisec)
> > Fixes:
> > 13147/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_JV_fuzzer-5727107827630080
> >
> > 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/jvdec.c | 5 +++++
> >  1 file changed, 5 insertions(+)
> >
> > diff --git a/libavcodec/jvdec.c b/libavcodec/jvdec.c
> > index cbe83d3c10..bf8a55cbad 100644
> > --- a/libavcodec/jvdec.c
> > +++ b/libavcodec/jvdec.c
> > @@ -170,6 +170,11 @@ static int decode_frame(AVCodecContext *avctx, void
> > *data, int *got_frame,
> >              GetBitContext gb;
> >              init_get_bits(&gb, buf, 8 * video_size);
> >
> > +            if ( avctx->height/8 * (avctx->width/8) > 4 * video_size) {
> > +                av_log(avctx, AV_LOG_ERROR, "Insuffient input data for
> > dimensions\n");
> 
> Typo

will apply without the typo

thanks


[...]
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