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avcodec/truemotion2: Fix 2 integer overflows in tm2_update_block()
Fixes: signed integer overflow: -2147483648 + -1 cannot be represented in type 'int' Fixes: 14107/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TRUEMOTION2_fuzzer-5694078680825856 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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@ -687,8 +687,8 @@ static inline void tm2_update_block(TM2Context *ctx, AVFrame *pic, int bx, int b
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/* update chroma */
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for (j = 0; j < 2; j++) {
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for (i = 0; i < 2; i++) {
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U[i] = Uo[i] + GET_TOK(ctx, TM2_UPD);
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V[i] = Vo[i] + GET_TOK(ctx, TM2_UPD);
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U[i] = Uo[i] + (unsigned)GET_TOK(ctx, TM2_UPD);
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V[i] = Vo[i] + (unsigned)GET_TOK(ctx, TM2_UPD);
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}
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U += Ustride;
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V += Vstride;
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