don't close a nonexistent connection (null dereference)

diff --git a/src/modules/rlm_sql/drivers/rlm_sql_mysql/sql_mysql.c b/src/modules/rlm_sql/drivers/rlm_sql_mysql/sql_mysql.c
index 831b9df..b503286 100644 (file)
--- a/src/modules/rlm_sql/drivers/rlm_sql_mysql/sql_mysql.c
+++ b/src/modules/rlm_sql/drivers/rlm_sql_mysql/sql_mysql.c
@@ -317,7 +317,8 @@ static int sql_close(SQLSOCK * sqlsocket, SQL_CONFIG *config) {
 
        rlm_sql_mysql_sock *mysql_sock = sqlsocket->conn;
 
-       mysql_close(mysql_sock->sock);
+       if (mysql_sock->sock)
+               mysql_close(mysql_sock->sock);
        mysql_sock->sock = NULL;
 
        return 0;