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avcodec/apedec: Fix undefined integer overflow in decode_array_0000()
Fixes: signed integer overflow: -2143289344 - 6246400 cannot be represented in type 'int'
Fixes: 19239/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_APE_fuzzer-5173755680915456
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 a3655bb02c
)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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@ -610,7 +610,7 @@ static void decode_array_0000(APEContext *ctx, GetBitContext *gb,
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ksummin = rice->k ? (1 << rice->k + 6) : 0;
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for (; i < blockstodecode; i++) {
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out[i] = get_rice_ook(&ctx->gb, rice->k);
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rice->ksum += out[i] - out[i - 64];
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rice->ksum += out[i] - (unsigned)out[i - 64];
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while (rice->ksum < ksummin) {
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rice->k--;
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ksummin = rice->k ? ksummin >> 1 : 0;
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