From 43e0e17ae637ac5984905f7433d38bfe0cf7e9bc Mon Sep 17 00:00:00 2001
From: "holyfoot/hf@mysql.com/hfmain.(none)" <>
Date: Mon, 25 Jun 2007 16:40:29 +0500
Subject: [PATCH] Bug #29247 Double free in libmysqlclient_r when mysql
 restarted.

If one sets MYSQL_READ_DEFAULTS_FILE and MYSQL_READ_DEFAULT_GROUP options
after mysql_real_connect() called with that MYSQL instance,
these options will affect next mysql_reconnect then.
As we use a copy of the original MYSQL object inside mysql_reconnect,
and mysql_real_connect frees options.my_cnf_file and _group strings,
we will free these twice when we execute mysql_reconnect with the
same MYSQL for the second time.

I don't think we should ever read defaults files handling mysql_reconnect.
So i just set them to 0 for the temporary MYSQL object there/
---
 sql-common/client.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sql-common/client.c b/sql-common/client.c
index 3e5ceb1a738..c18c56e9c47 100644
--- a/sql-common/client.c
+++ b/sql-common/client.c
@@ -2451,6 +2451,7 @@ my_bool mysql_reconnect(MYSQL *mysql)
   }
   mysql_init(&tmp_mysql);
   tmp_mysql.options= mysql->options;
+  tmp_mysql.options.my_cnf_file= tmp_mysql.options.my_cnf_group= 0;
   tmp_mysql.rpl_pivot= mysql->rpl_pivot;
   
   if (!mysql_real_connect(&tmp_mysql,mysql->host,mysql->user,mysql->passwd,