[FFmpeg-cvslog] avformat/hvcc: zero initialize the nal buffers past the last written byte

[James Almer]

ffmpeg | branch: release/3.2 | James Almer <jamrial at gmail.com> | Fri Feb 23 00:03:15 2018 -0300| [0a340924ef171711ba11eb5657fa8310b80bfdff] | committer: James Almer

avformat/hvcc: zero initialize the nal buffers past the last written byte

Prevents use of uninitialized values.

Fixes ticket #7038.

Reviewed-by: Michael Niedermayer <michael at niedermayer.cc>
Signed-off-by: James Almer <jamrial at gmail.com>
(cherry picked from commit 9482ec1b203e4cf51d7f60c85d261cc13f9a9d2f)

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=0a340924ef171711ba11eb5657fa8310b80bfdff
---

 libavformat/hevc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libavformat/hevc.c b/libavformat/hevc.c
index 7c294ef8a2..4c7ffc3312 100644
--- a/libavformat/hevc.c
+++ b/libavformat/hevc.c
@@ -668,6 +668,8 @@ static uint8_t *nal_unit_extract_rbsp(const uint8_t *src, uint32_t src_len,
     while (i < src_len)
         dst[len++] = src[i++];
 
+    memset(dst + len, 0, AV_INPUT_BUFFER_PADDING_SIZE);
+
     *dst_len = len;
     return dst;
 }