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

Fixes: 1967/clusterfuzz-testcase-minimized-5757031199801344

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-06-01 18:48:37 +02:00
parent cd6f319a74
commit 8b3e580b7f
1 changed files with 1 additions and 1 deletions
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2
libavcodec/wavpack.c
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@ -188,7 +188,7 @@ static int wv_get_value(WavpackFrameContext *ctx, GetBitContext *gb,
goto error;
t += t2;
} else {
if (get_bits_left(gb) < t2 - 1)
if (t2 >= 32 || get_bits_left(gb) < t2 - 1)
goto error;
t += get_bits_long(gb, t2 - 1) | (1 << (t2 - 1));
}