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avcodec/hevcdsp_template.c: Fix undefined shift in FUNC(dequant)

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Fixes: runtime error: left shift of negative value -180
Fixes: 4626/clusterfuzz-testcase-minimized-5647837887987712

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 0c9ab5ef9c1ee852c80c859c9e07efe8730b57ed)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-12-22 03:12:03 +01:00
parent e55a6c5f05
commit 0e7d8ce37c
1 changed files with 1 additions and 1 deletions
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libavcodec/hevcdsp_template.c
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@ -121,7 +121,7 @@ static void FUNC(dequant)(int16_t *coeffs, int16_t log2_size)
} else {
for (y = 0; y < size; y++) {
for (x = 0; x < size; x++) {
*coeffs = *coeffs << -shift;
*coeffs = *(uint16_t*)coeffs << -shift;
coeffs++;
}
}