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avcodec/vp9block: fix runtime error: signed integer overflow: 196675 * 20670 cannot be represented in type 'int'

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Fixes: 1710/clusterfuzz-testcase-minimized-4837032931098624

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: "Ronald S. Bultje" <rsbultje@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-05-21 02:12:21 +02:00
parent ec2b76aab4
commit d4ee767808
1 changed files with 2 additions and 2 deletions
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4
libavcodec/vp9block.c
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@ -915,9 +915,9 @@ skip_eob:
if (!--band_left)
band_left = band_counts[++band];
if (is_tx32x32)
STORE_COEF(coef, rc, ((vp8_rac_get(c) ? -val : val) * qmul[!!i]) / 2);
STORE_COEF(coef, rc, (int)((vp8_rac_get(c) ? -val : val) * (unsigned)qmul[!!i]) / 2);
else
STORE_COEF(coef, rc, (vp8_rac_get(c) ? -val : val) * qmul[!!i]);
STORE_COEF(coef, rc, (vp8_rac_get(c) ? -val : val) * (unsigned)qmul[!!i]);
nnz = (1 + cache[nb[i][0]] + cache[nb[i][1]]) >> 1;
tp = p[band][nnz];
} while (++i < n_coeffs);