On Wed, Oct 18, 2023 at 08:29:16PM +0200, Tomas Härdin wrote:
> ons 2023-10-18 klockan 02:49 +0200 skrev Michael Niedermayer:
> > Fixes: Assertion klv_offset >= mxf->run_in failed at
> > libavformat/mxfdec.c:736
> > Fixes: 62936/clusterfuzz-testcase-minimized-ffmpeg_dem_MXF_fuzzer-
> > 5778404366221312.fuzz
> > 
> > Found-by: continuous fuzzing process
> > https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
> > Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
> > ---
> >  libavformat/mxfdec.c | 13 ++++++++-----
> >  1 file changed, 8 insertions(+), 5 deletions(-)
> > 
> > diff --git a/libavformat/mxfdec.c b/libavformat/mxfdec.c
> > index 68939091e6..f2ec508b72 100644
> > --- a/libavformat/mxfdec.c
> > +++ b/libavformat/mxfdec.c
> > @@ -458,12 +458,15 @@ static int mxf_read_sync(AVIOContext *pb, const
> > uint8_t *key, unsigned size)
> >      return i == size;
> >  }
> >  
> > -static int klv_read_packet(KLVPacket *klv, AVIOContext *pb)
> > +static int klv_read_packet(MXFContext *mxf, KLVPacket *klv,
> > AVIOContext *pb)
> >  {
> >      int64_t length, pos;
> >      if (!mxf_read_sync(pb, mxf_klv_key, 4))
> >          return AVERROR_INVALIDDATA;
> >      klv->offset = avio_tell(pb) - 4;
> > +    if (klv->offset <  mxf->run_in)
> 
> One stray space in there which of course can be fixed when pushing
> 
> Looks OK

will apply with this change

thx

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

Modern terrorism, a quick summary: Need oil, start war with country that
has oil, kill hundread thousand in war. Let country fall into chaos,
be surprised about raise of fundamantalists. Drop more bombs, kill more
people, be surprised about them taking revenge and drop even more bombs
and strip your own citizens of their rights and freedoms. to be continued