On Tue, Nov 30, 2021 at 08:59:34PM +0100, Michael Niedermayer wrote: > Fixes: out of array read > Fixes: > 40284/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_VP3_fuzzer-4599568176644096 > > Found-by: continuous fuzzing process > https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg > Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > --- > libavcodec/vp3.c | 9 ++++++++- > 1 file changed, 8 insertions(+), 1 deletion(-) > > diff --git a/libavcodec/vp3.c b/libavcodec/vp3.c > index 16726080b35..5b9ba60f499 100644 > --- a/libavcodec/vp3.c > +++ b/libavcodec/vp3.c > @@ -2685,7 +2685,14 @@ static int vp3_decode_frame(AVCodecContext *avctx, > skip_bits(&gb, 4); /* width code */ > skip_bits(&gb, 4); /* height code */ > if (s->version) { > - s->version = get_bits(&gb, 5); > + int version = get_bits(&gb, 5); > +#if !CONFIG_VP4_DECODER > + if (version >= 2) { > + av_log(avctx, AV_LOG_ERROR, "This build does not support > decoding VP4.\n"); > + return AVERROR_DECODER_NOT_FOUND; > + } > +#endif > + s->version = version; > if (avctx->frame_number == 0) > av_log(s->avctx, AV_LOG_DEBUG, > "VP version: %d\n", s->version);
please apply. -- Peter (A907 E02F A6E5 0CD2 34CD 20D2 6760 79C5 AC40 DD6B)
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