[FFmpeg-devel] [PATCH 1/4] avcodec/dts2pts_bsf: Check ctx for NULL before ff_cbs_flush()

[Michael Niedermayer]

On Sun, Nov 06, 2022 at 07:38:42PM -0300, James Almer wrote:
> On 11/5/2022 5:16 PM, Michael Niedermayer wrote:
> > Fixes: null pointer dereference
> > Fixes: 52155/clusterfuzz-testcase-minimized-ffmpeg_BSF_DTS2PTS_fuzzer-5760107527143424
> > 
> > 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/dts2pts_bsf.c | 3 ++-
> >   1 file changed, 2 insertions(+), 1 deletion(-)
> > 
> > diff --git a/libavcodec/dts2pts_bsf.c b/libavcodec/dts2pts_bsf.c
> > index bf20b1ec8a..8142562d2c 100644
> > --- a/libavcodec/dts2pts_bsf.c
> > +++ b/libavcodec/dts2pts_bsf.c
> > @@ -505,7 +505,8 @@ static void dts2pts_flush(AVBSFContext *ctx)
> >       s->root = NULL;
> >       ff_cbs_fragment_reset(&s->au);
> > -    ff_cbs_flush(s->cbc);
> > +    if (s->cbc)
> > +        ff_cbs_flush(s->cbc);
> >   }
> >   static void dts2pts_close(AVBSFContext *ctx)
> 
> Should be ok.

will apply

thx

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

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