[FFmpeg-cvslog] avcodec/cfhd: Fix undefined shift

Michael Niedermayer git at videolan.org
Thu Jun 22 04:04:51 EEST 2017


ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Wed Jun 21 17:56:34 2017 +0200| [5a950f4e32a9756391f81987246d96b6549dd447] | committer: Michael Niedermayer

avcodec/cfhd: Fix undefined shift

Fixes: runtime error: left shift of negative value -1
Fixes: 2303/clusterfuzz-testcase-minimized-5529675273076736

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

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=5a950f4e32a9756391f81987246d96b6549dd447
---

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

diff --git a/libavcodec/cfhd.c b/libavcodec/cfhd.c
index ed127de29e..2a53a23c2b 100644
--- a/libavcodec/cfhd.c
+++ b/libavcodec/cfhd.c
@@ -711,7 +711,7 @@ static int cfhd_decode(AVCodecContext *avctx, void *data, int *got_frame,
         output = s->plane[plane].subband[0];
         for (i = 0; i < lowpass_height * 2; i++) {
             for (j = 0; j < lowpass_width * 2; j++)
-                output[j] <<= 2;
+                output[j] *= 4;
 
             output += lowpass_width * 2;
         }



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