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avcodec/truemotion2: Fix overflow in tm2_apply_deltas()
Fixes: signed integer overflow: 1077952576 + 1077952576 cannot be represented in type 'int'
Fixes: 7712/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TRUEMOTION2_fuzzer-5056281753681920
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 79c6047c36
)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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@ -451,7 +451,7 @@ static inline int GET_TOK(TM2Context *ctx,int type)
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/* common operations - add deltas to 4x4 block of luma or 2x2 blocks of chroma */
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static inline void tm2_apply_deltas(TM2Context *ctx, int* Y, int stride, int *deltas, int *last)
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{
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int ct, d;
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unsigned ct, d;
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int i, j;
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for (j = 0; j < 4; j++){
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