[FFmpeg-cvslog] avcodec/hevc/hevcdec: Clean sao_pixel_buffer_v on allocation

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Wed Jul 23 13:05:29 2025 +0200| [7a21c37f75ef493bafed3e3fdfbd3cf48990439b] | committer: Michael Niedermayer

avcodec/hevc/hevcdec: Clean sao_pixel_buffer_v on allocation

Fixes: use of uninitialized memory
Fixes: 378102648/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_HEVC_fuzzer-5896308499480576

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=7a21c37f75ef493bafed3e3fdfbd3cf48990439b
---

 libavcodec/hevc/hevcdec.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libavcodec/hevc/hevcdec.c b/libavcodec/hevc/hevcdec.c
index c2897ee336..a5012cf062 100644
--- a/libavcodec/hevc/hevcdec.c
+++ b/libavcodec/hevc/hevcdec.c
@@ -152,10 +152,10 @@ static int pic_arrays_init(HEVCLayerContext *l, const HEVCSPS *sps)
             int w = sps->width >> sps->hshift[c_idx];
             int h = sps->height >> sps->vshift[c_idx];
             l->sao_pixel_buffer_h[c_idx] =
-                av_malloc((w * 2 * sps->ctb_height) <<
+                av_mallocz((w * 2 * sps->ctb_height) <<
                           sps->pixel_shift);
             l->sao_pixel_buffer_v[c_idx] =
-                av_malloc((h * 2 * sps->ctb_width) <<
+                av_mallocz((h * 2 * sps->ctb_width) <<
                           sps->pixel_shift);
             if (!l->sao_pixel_buffer_h[c_idx] ||
                 !l->sao_pixel_buffer_v[c_idx])