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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-08-04 12:28:55 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2019-08-05 17:54:24 +0200 |
| commit | aecc9b96d613f54d772e9475738bb54e0e1f182e (patch) | |
| tree | e2dc003638352c4a46a842cb6419527940bac571 | |
| parent | 652ea23cb34bc59b38c0088865600e2b86079815 (diff) | |
avcodec/vorbisdec: Check parameters in vorbis_floor0_decode() before divide
Fixes: division by zero
Fixes: 16183/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_VORBIS_fuzzer-5688966782648320
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/vorbisdec.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/libavcodec/vorbisdec.c b/libavcodec/vorbisdec.c index a86d4c4c36..793f079737 100644 --- a/libavcodec/vorbisdec.c +++ b/libavcodec/vorbisdec.c @@ -1182,6 +1182,9 @@ static int vorbis_floor0_decode(vorbis_context *vc, q *= q; } + if (p + q == 0.0) + return AVERROR_INVALIDDATA; + /* calculate linear floor value */ q = exp((((amplitude*vf->amplitude_offset) / (((1ULL << vf->amplitude_bits) - 1) * sqrt(p + q))) |