On 1/6/19, Michael Niedermayer <mich...@niedermayer.cc> wrote: > Fixes: Out of array access > Fixes: > 12367/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_HYMT_fuzzer-5662313959391232 > Fixes: > 12370/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_HYMT_fuzzer-5670984961490944 > Fixes: > 12376/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_HYMT_fuzzer-5644026183680000 > Fixes: > 12383/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_HYMT_fuzzer-5722087214284800 > Fixes: > 12390/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_HYMT_fuzzer-5696653095337984 > Fixes: > 12408/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_HYMT_fuzzer-5729689379799040 > > Found-by: continuous fuzzing process > https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg > Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > --- > libavcodec/huffyuvdec.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/libavcodec/huffyuvdec.c b/libavcodec/huffyuvdec.c > index dfe3585e6e..8226c07743 100644 > --- a/libavcodec/huffyuvdec.c > +++ b/libavcodec/huffyuvdec.c > @@ -1254,7 +1254,8 @@ static int decode_frame(AVCodecContext *avctx, void > *data, int *got_frame, > slices_info_offset = AV_RL32(avpkt->data + buf_size - 4); > slice_height = AV_RL32(avpkt->data + buf_size - 8); > nb_slices = AV_RL32(avpkt->data + buf_size - 12); > - if (nb_slices * 8LL + slices_info_offset > buf_size - 16 || > slice_height <= 0) > + if (nb_slices * 8LL + slices_info_offset > buf_size - 16 || > + slice_height <= 0 || nb_slices * (uint64_t)slice_height > > height) > return AVERROR_INVALIDDATA; > } else { > slice_height = height; > -- > 2.20.1 >
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