On Mon, Aug 15, 2022 at 09:04:09PM +0200, Andreas Rheinhardt wrote: > Michael Niedermayer: > > Fixes: Timeout > > Fixes: > > 49718/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MPEG4_fuzzer-4874987894341632 > > > > Found-by: continuous fuzzing process > > https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg > > Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > > --- > > libavcodec/h263dec.c | 2 ++ > > 1 file changed, 2 insertions(+) > > > > diff --git a/libavcodec/h263dec.c b/libavcodec/h263dec.c > > index 8db0eccd89..c03a55a4fd 100644 > > --- a/libavcodec/h263dec.c > > +++ b/libavcodec/h263dec.c > > @@ -553,6 +553,8 @@ retry: > > avctx->has_b_frames = !s->low_delay; > > > > if (CONFIG_MPEG4_DECODER && avctx->codec_id == AV_CODEC_ID_MPEG4) { > > + if (s->pict_type != AV_PICTURE_TYPE_B && s->mb_num/2 > > > get_bits_count(&s->gb)) > > + return AVERROR_INVALIDDATA; > > if (ff_mpeg4_workaround_bugs(avctx) == 1) > > goto retry; > > if (s->studio_profile != (s->idsp.idct == NULL)) > > Is it possible that you wanted to use get_bits_left() here?
yes thx [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB The bravest are surely those who have the clearest vision of what is before them, glory and danger alike, and yet notwithstanding go out to meet it. -- Thucydides
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