[FFmpeg-devel] [PATCH 2/2] avformat/mvdec: Use 64 bit in timestamp computation
Michael Niedermayer
michael at niedermayer.cc
Thu Dec 16 22:03:36 EET 2021
On Thu, Dec 16, 2021 at 11:26:23AM +1100, Peter Ross wrote:
> On Wed, Dec 15, 2021 at 06:37:13PM +0100, Michael Niedermayer wrote:
> > Fixes: division by zero
> > Fixes: 42198/clusterfuzz-testcase-minimized-ffmpeg_dem_MV_fuzzer-5054366405492736.fuzz
> > Fixes: 42222/clusterfuzz-testcase-minimized-ffmpeg_dem_MV_fuzzer-4561249331970048
> >
> > Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
> > Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> > ---
> > libavformat/mvdec.c | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/libavformat/mvdec.c b/libavformat/mvdec.c
> > index 8b54a9ab045..5d184f20a49 100644
> > --- a/libavformat/mvdec.c
> > +++ b/libavformat/mvdec.c
> > @@ -381,7 +381,7 @@ static int mv_read_header(AVFormatContext *avctx)
> > avio_skip(pb, 8);
> > av_add_index_entry(ast, pos, timestamp, asize, 0, AVINDEX_KEYFRAME);
> > av_add_index_entry(vst, pos + asize, i, vsize, 0, AVINDEX_KEYFRAME);
> > - timestamp += asize / (ast->codecpar->channels * bytes_per_sample);
> > + timestamp += asize / (ast->codecpar->channels * (uint64_t)bytes_per_sample);
> > }
> > } else if (!version && avio_rb16(pb) == 3) {
> > avio_skip(pb, 4);
> > --
> > 2.17.1
>
> please apply.
will apply
thx
[...]
--
Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
Never trust a computer, one day, it may think you are the virus. -- Compn
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