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avcodec/diracdec: Fix integer overflow in divide3()
Fixes: runtime error: signed integer overflow: -1073746548 * 21845 cannot be represented in type 'int' Fixes: 2729/clusterfuzz-testcase-minimized-5902915464069120 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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@ -249,7 +249,7 @@ enum dirac_subband {
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/* magic number division by 3 from schroedinger */
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static inline int divide3(int x)
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{
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return ((x+1)*21845 + 10922) >> 16;
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return (int)((x+1U)*21845 + 10922) >> 16;
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}
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static DiracFrame *remove_frame(DiracFrame *framelist[], int picnum)
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