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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-03-10 23:45:19 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2019-03-24 10:38:52 +0100 |
| commit | 5e09dc8afebbdefa0b4c1b3d9e6b5b601e2b815b (patch) | |
| tree | 34bd645915f85ed4baabec8ecd7a69dd685ee27a /libavcodec | |
| parent | 51d29541cb22b2fb258fcafbd8bf6038c35a3a62 (diff) | |
| download | ffmpeg-5e09dc8afebbdefa0b4c1b3d9e6b5b601e2b815b.tar.gz | |
avcodec/dfa: Check the chunk header is not truncated
Fixes: Timeout (11sec -> 3sec)
Fixes: 13218/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_DFA_fuzzer-5661074316066816
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit f20760fadbc77483b9ff4b400b53ebb38ee33793)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec')
| -rw-r--r-- | libavcodec/dfa.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/libavcodec/dfa.c b/libavcodec/dfa.c index fdc1e198da..5aa1c8408e 100644 --- a/libavcodec/dfa.c +++ b/libavcodec/dfa.c @@ -353,6 +353,8 @@ static int dfa_decode_frame(AVCodecContext *avctx, bytestream2_init(&gb, avpkt->data, avpkt->size); while (bytestream2_get_bytes_left(&gb) > 0) { + if (bytestream2_get_bytes_left(&gb) < 12) + return AVERROR_INVALIDDATA; bytestream2_skip(&gb, 4); chunk_size = bytestream2_get_le32(&gb); chunk_type = bytestream2_get_le32(&gb); |