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avcodec/wavpack: Fix runtime error: shift exponent 137 is too large for 32-bit type 'int' 

Fixes: 808/clusterfuzz-testcase-4715513349406720

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-03-12 23:45:54 +01:00
parent a557ae8d52
commit 1467143a6e
1 changed files with 1 additions and 1 deletions
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libavcodec/wavpack.h
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@ -171,7 +171,7 @@ static av_always_inline int wp_exp2(int16_t val)
res = wp_exp2_table[val & 0xFF] | 0x100;
val >>= 8;
if (val > 31)
if (val > 31U)
return INT_MIN;
res = (val > 9) ? (res << (val - 9)) : (res >> (9 - val));
return neg ? -res : res;