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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-11-20 22:05:40 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-07-01 12:49:26 +0200 |
| commit | 9626dd3257460ea1afd49c7187fb11c732819210 (patch) | |
| tree | 50f6c9e719e85fdb57b013f69309c4792a265302 /libavcodec/wmalosslessdec.c | |
| parent | b37e5eb31f93d827f266db4d4c2dcbed9a1ba3b5 (diff) | |
| download | ffmpeg-9626dd3257460ea1afd49c7187fb11c732819210.tar.gz | |
avcodec/wmalosslessdec: Fix 2 overflows in mclms
Fixes: signed integer overflow: 2038337026 + 109343477 cannot be represented in type 'int'
Fixes: 18886/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WMALOSSLESS_fuzzer-5673660505653248
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 92455c8c65c403ea696cb8c63d474d386d631bbd)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec/wmalosslessdec.c')
| -rw-r--r-- | libavcodec/wmalosslessdec.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/libavcodec/wmalosslessdec.c b/libavcodec/wmalosslessdec.c index c5a98f1b6a..dce1da1a56 100644 --- a/libavcodec/wmalosslessdec.c +++ b/libavcodec/wmalosslessdec.c @@ -629,7 +629,7 @@ static void mclms_update(WmallDecodeCtx *s, int icoef, int *pred) int range = 1 << (s->bits_per_sample - 1); for (ich = 0; ich < num_channels; ich++) { - pred_error = s->channel_residues[ich][icoef] - pred[ich]; + pred_error = s->channel_residues[ich][icoef] - (unsigned)pred[ich]; if (pred_error > 0) { for (i = 0; i < order * num_channels; i++) s->mclms_coeffs[i + ich * order * num_channels] += @@ -681,7 +681,7 @@ static void mclms_predict(WmallDecodeCtx *s, int icoef, int *pred) s->mclms_coeffs_cur[i + num_channels * ich]; pred[ich] += (1 << s->mclms_scaling) >> 1; pred[ich] >>= s->mclms_scaling; - s->channel_residues[ich][icoef] += pred[ich]; + s->channel_residues[ich][icoef] += (unsigned)pred[ich]; } } |