Fixes: runtime error: shift exponent -1 is negative Fixes: 2742/clusterfuzz-testcase-minimized-5724322402402304 Fixes: 2744/clusterfuzz-testcase-minimized-4672435653705728 Fixes: 2749/clusterfuzz-testcase-minimized-5298741273690112
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> --- libavcodec/diracdec.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/libavcodec/diracdec.c b/libavcodec/diracdec.c index d2aaeab011..f2837aca69 100644 --- a/libavcodec/diracdec.c +++ b/libavcodec/diracdec.c @@ -1179,6 +1179,11 @@ static int dirac_unpack_prediction_parameters(DiracContext *s) if (get_bits1(gb)) { s->weight_log2denom = get_interleaved_ue_golomb(gb); + if (s->weight_log2denom < 1 || s->weight_log2denom > 8) { + av_log(s->avctx, AV_LOG_ERROR, "weight_log2denom unsupported or invalid\n"); + s->weight_log2denom = 1; + return AVERROR_INVALIDDATA; + } s->weight[0] = dirac_get_se_golomb(gb); if (s->num_refs == 2) s->weight[1] = dirac_get_se_golomb(gb); -- 2.13.0 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
