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avcodec/cavsdec: Fix undefined behavior from integer overflow

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Fixes: 1335/clusterfuzz-testcase-minimized-5566961566089216

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 a0e5f7f363)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-05-05 03:24:40 +02:00
parent 65bc41b857
commit e45de9d279
1 changed files with 1 additions and 1 deletions
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2
libavcodec/cavsdec.c
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@ -466,7 +466,7 @@ static inline void mv_pred_direct(AVSContext *h, cavs_vector *pmv_fw,
cavs_vector *col_mv)
{
cavs_vector *pmv_bw = pmv_fw + MV_BWD_OFFS;
int den = h->direct_den[col_mv->ref];
unsigned den = h->direct_den[col_mv->ref];
int m = FF_SIGNBIT(col_mv->x);
pmv_fw->dist = h->dist[1];