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avcodec/ivi_dsp: Fix runtime error: left shift of negative value -2

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Fixes: 1839/clusterfuzz-testcase-minimized-6238490993885184

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 2017-05-28 03:03:46 +02:00
parent 114e871621
commit 357f2316a0
1 changed files with 2 additions and 2 deletions
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4
libavcodec/ivi_dsp.c
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@ -393,8 +393,8 @@ void ff_ivi_inverse_haar_4x4(const int32_t *in, int16_t *out, ptrdiff_t pitch,
if (flags[i]) {
/* pre-scaling */
shift = !(i & 2);
sp1 = src[0] << shift;
sp2 = src[4] << shift;
sp1 = src[0] * (1 << shift);
sp2 = src[4] * (1 << shift);
INV_HAAR4( sp1, sp2, src[8], src[12],
dst[0], dst[4], dst[8], dst[12],
t0, t1, t2, t3, t4);