From 26755a8c6f6d3f548b941c9848d5e16fb19b1493 Mon Sep 17 00:00:00 2001
From: James Almer <jamrial@gmail.com>
Date: Fri, 23 Feb 2018 00:03:15 -0300
Subject: [PATCH] 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@niedermayer.cc>
Signed-off-by: James Almer <jamrial@gmail.com>
(cherry picked from commit 9482ec1b203e4cf51d7f60c85d261cc13f9a9d2f)
---
 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;
 }