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avcodec/wavpack: Fix signed integer overflow: 1285114081 * 2 cannot be represented in type 'int'

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Fixes: 945/clusterfuzz-testcase-6037937588273152
Fixes: integer overflow

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 2017-05-04 23:41:28 +02:00
parent 2cb656ad11
commit aaeec1c654
1 changed files with 2 additions and 2 deletions
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4
libavcodec/wavpack.c
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@ -240,7 +240,7 @@ static int wv_get_value(WavpackFrameContext *ctx, GetBitContext *gb,
if (get_bits_left(gb) <= 0)
goto error;
} else {
int mid = (base * 2 + add + 1) >> 1;
int mid = (base * 2U + add + 1) >> 1;
while (add > c->error_limit) {
if (get_bits_left(gb) <= 0)
goto error;
@ -249,7 +249,7 @@ static int wv_get_value(WavpackFrameContext *ctx, GetBitContext *gb,
base = mid;
} else
add = mid - base - 1;
mid = (base * 2 + add + 1) >> 1;
mid = (base * 2U + add + 1) >> 1;
}
ret = mid;
}