[FFmpeg-cvslog] avcodec/hevcdsp_template: Fix undefined shift
Michael Niedermayer
git at videolan.org
Thu Oct 26 20:14:11 EEST 2017
ffmpeg | branch: release/3.0 | Michael Niedermayer <michael at niedermayer.cc> | Mon Oct 2 04:18:21 2017 +0200| [9f2beced0a524ec002e559155ecc88343e8f91f4] | committer: Michael Niedermayer
avcodec/hevcdsp_template: Fix undefined shift
Fixes: runtime error: left shift of negative value -255
Fixes: 3373/clusterfuzz-testcase-minimized-5604083912146944
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 fbdab6eca7874fbeba6aa79c269f345e4d43f5d4)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=9f2beced0a524ec002e559155ecc88343e8f91f4
---
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 5bca02342d..dd1643f6d1 100644
--- a/libavcodec/hevcdsp_template.c
+++ b/libavcodec/hevcdsp_template.c
@@ -1492,7 +1492,7 @@ static void FUNC(put_hevc_epel_bi_w_hv)(uint8_t *_dst, ptrdiff_t _dststride, uin
for (y = 0; y < height; y++) {
for (x = 0; x < width; x++)
dst[x] = av_clip_pixel(((EPEL_FILTER(tmp, MAX_PB_SIZE) >> 6) * wx1 + src2[x] * wx0 +
- ((ox0 + ox1 + 1) << log2Wd)) >> (log2Wd + 1));
+ ((ox0 + ox1 + 1) * (1 << log2Wd))) >> (log2Wd + 1));
tmp += MAX_PB_SIZE;
dst += dststride;
src2 += MAX_PB_SIZE;
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