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avcodec/mlpdec: Fix runtime error: left shift of negative value -1

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Fixes: 1636/clusterfuzz-testcase-minimized-5310494757879808

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 552adf1dd3a38fb7a1a6109dd2b517d63290f20e)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-05-17 00:53:32 +02:00
parent e79851f2e7
commit 28f2341e2f
1 changed files with 1 additions and 1 deletions
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libavcodec/mlpdec.c
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@ -701,7 +701,7 @@ static int read_filter_params(MLPDecodeContext *m, GetBitContext *gbp,
/* TODO: Check validity of state data. */
for (i = 0; i < order; i++)
fp->state[i] = state_bits ? get_sbits(gbp, state_bits) << state_shift : 0;
fp->state[i] = state_bits ? get_sbits(gbp, state_bits) * (1 << state_shift) : 0;
}
}