[FFmpeg-cvslog] avcodec/hevcdsp_template: Fix undefined shift in put_hevc_pel_bi_w_pixels

[Michael Niedermayer]

ffmpeg | branch: release/3.1 | Michael Niedermayer <michael at niedermayer.cc> | Sun Sep 10 01:32:51 2017 +0200| [4b43dd03eddeac40deabcbb3c73370a058251556] | committer: Michael Niedermayer

avcodec/hevcdsp_template: Fix undefined shift in put_hevc_pel_bi_w_pixels

Fixes: runtime error: left shift of negative value -95
Fixes: 3077/clusterfuzz-testcase-minimized-4684917524922368

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit c225da68cffbea11270a758ff42859194c980863)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=4b43dd03eddeac40deabcbb3c73370a058251556
---

 libavcodec/hevcdsp_template.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/hevcdsp_template.c b/libavcodec/hevcdsp_template.c
index b840d179c3..5bca02342d 100644
--- a/libavcodec/hevcdsp_template.c
+++ b/libavcodec/hevcdsp_template.c
@@ -599,7 +599,7 @@ static void FUNC(put_hevc_pel_bi_w_pixels)(uint8_t *_dst, ptrdiff_t _dststride,
     ox1     = ox1 * (1 << (BIT_DEPTH - 8));
     for (y = 0; y < height; y++) {
         for (x = 0; x < width; x++) {
-            dst[x] = av_clip_pixel(( (src[x] << (14 - BIT_DEPTH)) * wx1 + src2[x] * wx0 + ((ox0 + ox1 + 1) << log2Wd)) >> (log2Wd + 1));
+            dst[x] = av_clip_pixel(( (src[x] << (14 - BIT_DEPTH)) * wx1 + src2[x] * wx0 + (ox0 + ox1 + 1) * (1 << log2Wd)) >> (log2Wd + 1));
         }
         src  += srcstride;
         dst  += dststride;