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avcodec/wmalosslessdec: Fix integer overflows in revert_inter_ch_decorr()
Fixes: signed integer overflow: -717241856 + -1434459904 cannot be represented in type 'int' Fixes: 21405/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WMALOSSLESS_fuzzer-5677143666458624 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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@ -790,8 +790,8 @@ static void revert_inter_ch_decorr(WmallDecodeCtx *s, int tile_size)
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else if (s->is_channel_coded[0] || s->is_channel_coded[1]) {
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int icoef;
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for (icoef = 0; icoef < tile_size; icoef++) {
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s->channel_residues[0][icoef] -= s->channel_residues[1][icoef] >> 1;
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s->channel_residues[1][icoef] += s->channel_residues[0][icoef];
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s->channel_residues[0][icoef] -= (unsigned)(s->channel_residues[1][icoef] >> 1);
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s->channel_residues[1][icoef] += (unsigned) s->channel_residues[0][icoef];
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}
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}
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}
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