From 96e340760824e537e2d034abf9a3b8be3e2b312c Mon Sep 17 00:00:00 2001
From: Dale Curtis <dalecurtis@chromium.org>
Date: Tue, 21 Nov 2017 15:10:08 -0800
Subject: [PATCH] Free extradata before reallocating.

Otherwise ff_alloc_extradata() just leaks any existing allocated
memory.

Signed-off-by: Dale Curtis <dalecurtis@chromium.org>
Reviewed-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
 libavformat/oggparseogm.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libavformat/oggparseogm.c b/libavformat/oggparseogm.c
index e7a501b5a7..fad093b629 100644
--- a/libavformat/oggparseogm.c
+++ b/libavformat/oggparseogm.c
@@ -110,6 +110,7 @@ ogm_header(AVFormatContext *s, int idx)
                 size -= 52;
                 if (bytestream2_get_bytes_left(&p) < size)
                     return AVERROR_INVALIDDATA;
+                av_freep(&st->codecpar->extradata);
                 if (ff_alloc_extradata(st->codecpar, size) < 0)
                     return AVERROR(ENOMEM);
                 bytestream2_get_buffer(&p, st->codecpar->extradata, st->codecpar->extradata_size);