[FFmpeg-devel] [PATCH 1/4] avformat/mxfdec: check channel number in mxf_get_d10_aes3_packet()

[Michael Niedermayer]

On Sun, Sep 12, 2021 at 02:58:52PM +0200, Tomas Härdin wrote:
> sön 2021-09-05 klockan 21:24 +0200 skrev Michael Niedermayer:
> > Fixes: Out of array access
> > Fixes: 37030/clusterfuzz-testcase-minimized-ffmpeg_DEMUXER_fuzzer-
> > 5387719147651072
> > 
> > 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/mxfdec.c | 4 ++++
> >  1 file changed, 4 insertions(+)
> > 
> > diff --git a/libavformat/mxfdec.c b/libavformat/mxfdec.c
> > index 55f2e5c767..ebe411b04d 100644
> > --- a/libavformat/mxfdec.c
> > +++ b/libavformat/mxfdec.c
> > @@ -552,6 +552,10 @@ static int mxf_get_d10_aes3_packet(AVIOContext
> > *pb, AVStream *st, AVPacket *pkt,
> >      data_ptr = pkt->data;
> >      end_ptr = pkt->data + length;
> >      buf_ptr = pkt->data + 4; /* skip SMPTE 331M header */
> > +
> > +    if (st->codecpar->channels > 8)
> > +        return AVERROR_INVALIDDATA;
> 
> Looks fine. Double-checked S331m, AES is limited to 8 channels

will apply

thx

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Those who are too smart to engage in politics are punished by being
governed by those who are dumber. -- Plato 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 195 bytes
Desc: not available
URL: <https://ffmpeg.org/pipermail/ffmpeg-devel/attachments/20210913/da5817f4/attachment.sig>