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avcodec/dss_sp: Fix runtime error: signed integer overflow: 2147481189 + 4096 cannot be represented in type 'int'

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Fixes: 1441/clusterfuzz-testcase-minimized-6223152357048320

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 6ea428789371fa0601e9ebb5b7f2216d4e73e831)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-05-10 18:51:58 +02:00
parent 00e8a7adf4
commit 7b4d0a2402
1 changed files with 1 additions and 1 deletions
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libavcodec/dss_sp.c
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@ -529,7 +529,7 @@ static void dss_sp_shift_sq_sub(const int32_t *filter_buf,
for (i = 14; i > 0; i--)
error_buf[i] = error_buf[i - 1];
tmp = (tmp + 4096) >> 13;
tmp = (int)(tmp + 4096U) >> 13;
error_buf[1] = tmp;