From cce37a22bc319c4b9e49d2b907841d9ec3f98c56 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Wed, 15 Jan 2020 22:13:14 +0100 Subject: avcodec/mvha: Check remaining bits in VLC decode loop Fixes: timeout (252sec -> 170msec) Fixes: 20023/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MVHA_fuzzer-5681192565473280 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/mvha.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/libavcodec/mvha.c b/libavcodec/mvha.c index 1ea3bb3d76..c603ef6975 100644 --- a/libavcodec/mvha.c +++ b/libavcodec/mvha.c @@ -233,6 +233,8 @@ static int decode_frame(AVCodecContext *avctx, dst = frame->data[p] + (avctx->height - 1) * frame->linesize[p]; for (int y = 0; y < avctx->height; y++) { + if (get_bits_left(gb) < width) + return AVERROR_INVALIDDATA; for (int x = 0; x < width; x++) { int v = get_vlc2(gb, s->vlc.table, s->vlc.bits, 3); -- cgit v1.2.3