avcodec/qoadec: Fix undefined overflow in lms_predict
Fixes: signed integer overflow: -1575944192 + -602931200 cannot be represented in type 'int' Fixes: 62285/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_QOA_fuzzer-6470469339185152 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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@ -67,7 +67,7 @@ static int qoa_lms_predict(QOAChannel *lms)
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{
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int prediction = 0;
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for (int i = 0; i < QOA_LMS_LEN; i++)
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prediction += lms->weights[i] * lms->history[i];
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prediction += (unsigned)lms->weights[i] * lms->history[i];
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return prediction >> 13;
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}
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