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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-11-29 22:45:07 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-01-06 15:03:15 +0100 |
| commit | 74ef2ddbdb5ed4d6a4ffc0b7a20ba4b6fa6e14fc (patch) | |
| tree | ae85274991fb464ec045bf3466e6a86d30235ccc | |
| parent | 7f4c5ede99a374af011631c9bcf9db8f181ee618 (diff) | |
| download | ffmpeg-74ef2ddbdb5ed4d6a4ffc0b7a20ba4b6fa6e14fc.tar.gz | |
avcodec/wmalosslessdec: Fixes undefined overflow in dequantization in decode_subframe()
Fixes: signed integer overflow: 47875596 * 45 cannot be represented in type 'int'
Fixes: 19082/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WMALOSSLESS_fuzzer-5687766512041984
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 53efab44a9d0971c6c12d9b3d1af855ca863c847)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/wmalosslessdec.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavcodec/wmalosslessdec.c b/libavcodec/wmalosslessdec.c index 7de93f241f..d47fd89c52 100644 --- a/libavcodec/wmalosslessdec.c +++ b/libavcodec/wmalosslessdec.c @@ -979,7 +979,7 @@ static int decode_subframe(WmallDecodeCtx *s) if (s->quant_stepsize != 1) for (i = 0; i < s->num_channels; i++) for (j = 0; j < subframe_len; j++) - s->channel_residues[i][j] *= s->quant_stepsize; + s->channel_residues[i][j] *= (unsigned)s->quant_stepsize; } /* Write to proper output buffer depending on bit-depth */ |