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avcodec/hevcpred_template: Fix left shift of negative value 

Fixes: runtime error: left shift of negative value -1
Fixes: 2250/clusterfuzz-testcase-minimized-5693382112313344

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 c94326c1fc)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-06-17 14:54:19 +02:00
parent 6a5ade5608
commit f2e970b2bd
1 changed files with 1 additions and 1 deletions
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2
libavcodec/hevcpred_template.c
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@ -35,7 +35,7 @@ static av_always_inline void FUNC(intra_pred)(HEVCContext *s, int x0, int y0,
#define MVF(x, y) \
(s->ref->tab_mvf[(x) + (y) * min_pu_width])
#define MVF_PU(x, y) \
MVF(PU(x0 + ((x) << hshift)), PU(y0 + ((y) << vshift)))
MVF(PU(x0 + ((x) * (1 << hshift))), PU(y0 + ((y) * (1 << vshift))))
#define IS_INTRA(x, y) \
(MVF_PU(x, y).pred_flag == PF_INTRA)
#define MIN_TB_ADDR_ZS(x, y) \