From f90983738b0192b19cd000decc08b6f7772b2803 Mon Sep 17 00:00:00 2001
From: rbultje <rbultje@9553f0bf-9b14-0410-a0b8-cfaf0461ba5b>
Date: Sat, 21 Mar 2009 20:59:59 +0000
Subject: [PATCH] Free metadata if already allocated; fixes a memleak if the
 header occurs twice in a stream (e.g. malicious input, broken file, etc.).
 See summary in "[PATCH] rtsp.c small cleanups" thread on mailinglist.

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@18126 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b
---
 libavformat/rtsp.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libavformat/rtsp.c b/libavformat/rtsp.c
index 47378146f..5100c978e 100644
--- a/libavformat/rtsp.c
+++ b/libavformat/rtsp.c
@@ -202,6 +202,8 @@ static void sdp_parse_fmtp_config(AVCodecContext *codec, char *attr, char *value
             if (!strcmp(attr, "config")) {
                 /* decode the hexa encoded parameter */
                 int len = hex_to_data(NULL, value);
+                if (codec->extradata)
+                    av_free(codec->extradata);
                 codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
                 if (!codec->extradata)
                     return;
-- 
2.39.2