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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-12-06 00:07:17 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2019-12-06 11:25:29 +0100 |
| commit | e7011a0ca6548e12b458259c51e305e8a4d5ae2e (patch) | |
| tree | e1aac261aa44704c49d5fb0d3f0e8b3061287f87 | |
| parent | 5ee4c12ec277028ece4b18c703dc9cd3e3b885e0 (diff) | |
| download | ffmpeg-e7011a0ca6548e12b458259c51e305e8a4d5ae2e.tar.gz | |
avcodec/mvha: Check remaining space when reading VLC table probabilities
Fixes: Infinite loop
Fixes: 19183/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MVHA_fuzzer-5666216765292544
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/mvha.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/libavcodec/mvha.c b/libavcodec/mvha.c index 4b03a79283..c270063b1c 100644 --- a/libavcodec/mvha.c +++ b/libavcodec/mvha.c @@ -203,6 +203,9 @@ static int decode_frame(AVCodecContext *avctx, for (int i = 0; i < s->nb_symbols; symbol++) { int prob; + if (get_bits_left(gb) < 4) + return AVERROR_INVALIDDATA; + if (get_bits1(gb)) { prob = get_bits(gb, 12); } else { |