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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-11-20 22:05:40 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2019-12-15 01:01:22 +0100 |
| commit | 92455c8c65c403ea696cb8c63d474d386d631bbd (patch) | |
| tree | c6397cbb64f2149481f970e6a6ef7fc2853dbdb5 /libavcodec | |
| parent | 6b7bcd437e590f1678cd6588dcb335d092a1e048 (diff) | |
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>
Diffstat (limited to 'libavcodec')
| -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 7afadaae4a..d4dd0ed4e3 100644 --- a/libavcodec/wmalosslessdec.c +++ b/libavcodec/wmalosslessdec.c @@ -628,7 +628,7 @@ 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] += @@ -680,7 +680,7 @@ 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]; } } |