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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-01-31 00:45:51 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2019-02-07 00:29:01 +0100 |
| commit | 1e59071aad9582fd2ef53b3e9c0dcf4ee913af0f (patch) | |
| tree | e238f9eee0fa3605f789a9b690f4914c7e410a93 | |
| parent | 835ab35ef023373fd05abffc754d30b4582c6506 (diff) | |
| download | ffmpeg-1e59071aad9582fd2ef53b3e9c0dcf4ee913af0f.tar.gz | |
avcodec/ac3: Explicitly return to discard large amounts of nonsense bytes
Changes 19sec to 10ms (12559) runtime, 17sec to 177ms (12570)
Fixes: Timeout
Fixes: 12559/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_AC3_fuzzer-5666516266123264
Fixes: 12561/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_AC3_FIXED_fuzzer-5682923041193984
Fixes: 12570/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_EAC3_fuzzer-5194734308425728
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/ac3dec.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/libavcodec/ac3dec.c b/libavcodec/ac3dec.c index f844a463ee..eaa327a3ee 100644 --- a/libavcodec/ac3dec.c +++ b/libavcodec/ac3dec.c @@ -1490,6 +1490,8 @@ static int ac3_decode_frame(AVCodecContext * avctx, void *data, } if (i >= buf_size) return AVERROR_INVALIDDATA; + if (i > 10) + return i; buf += i; buf_size -= i; |