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avcodec/diracdec: Check perspective_exp and zrs_exp.
Fixes: undefined shift Fixes: runtime error: shift exponent 264 is too large for 32-bit type 'int' Fixes: 2860/clusterfuzz-testcase-minimized-4672811689836544 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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@ -1161,6 +1161,10 @@ static int dirac_unpack_prediction_parameters(DiracContext *s)
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s->globalmc[ref].perspective[0] = dirac_get_se_golomb(gb);
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s->globalmc[ref].perspective[1] = dirac_get_se_golomb(gb);
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}
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if (s->globalmc[ref].perspective_exp + (uint64_t)s->globalmc[ref].zrs_exp > 30) {
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return AVERROR_INVALIDDATA;
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}
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}
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}
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