[FFmpeg-cvslog] avcodec/vc2enc: Clear coef_buf on allocation

[Michael Niedermayer]

ffmpeg | branch: release/3.4 | Michael Niedermayer <michael at niedermayer.cc> | Wed Nov 15 16:53:34 2017 +0100| [7b16eacf81dc55463934d7f45c600f0322d74f27] | committer: Michael Niedermayer

avcodec/vc2enc: Clear coef_buf on allocation

Fixes: Use of uninitialized memory
Fixes: assertion failure

Reviewed-by: <atomnuker>
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 6d00905f8134a2932e5c00dd1ec8b2a1f0a38035)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=7b16eacf81dc55463934d7f45c600f0322d74f27
---

 libavcodec/vc2enc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/vc2enc.c b/libavcodec/vc2enc.c
index 1059f41b56..cdc7d4250d 100644
--- a/libavcodec/vc2enc.c
+++ b/libavcodec/vc2enc.c
@@ -1171,7 +1171,7 @@ static av_cold int vc2_encode_init(AVCodecContext *avctx)
         p->dwt_width  = w = FFALIGN(p->width,  (1 << s->wavelet_depth));
         p->dwt_height = h = FFALIGN(p->height, (1 << s->wavelet_depth));
         p->coef_stride = FFALIGN(p->dwt_width, 32);
-        p->coef_buf = av_malloc(p->coef_stride*p->dwt_height*sizeof(dwtcoef));
+        p->coef_buf = av_mallocz(p->coef_stride*p->dwt_height*sizeof(dwtcoef));
         if (!p->coef_buf)
             goto alloc_fail;
         for (level = s->wavelet_depth-1; level >= 0; level--) {