From fd31eea949e5cbfccb97715bec62f6c63ece6010 Mon Sep 17 00:00:00 2001
From: Arun Kuruvila <arun.kuruvila@oracle.com>
Date: Fri, 22 Jul 2016 13:15:32 +0530
Subject: [PATCH] Bug #23295288: HANDLE_FATAL_SIGNAL (SIG=11) IN               
 GET_SERVER_FROM_TABLE_TO_CACHE

Description:- Server received SIG11 in the function,
"get_server_from_table_to_cache()".

Analysis:- Defining a server with a blank name is not
handled properly.

Fix:- Modified "get_server_from_table_to_cache()" to
take care of blank server name.
---
 sql/sql_yacc.yy | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/sql/sql_yacc.yy b/sql/sql_yacc.yy
index 16ed61334c6..b8ddc8bd49f 100644
--- a/sql/sql_yacc.yy
+++ b/sql/sql_yacc.yy
@@ -1,5 +1,5 @@
 /*
-   Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.
+   Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -2148,6 +2148,11 @@ server_def:
           ident_or_text
           OPTIONS_SYM '(' server_options_list ')'
           {
+            if ($2.length == 0)
+            {
+              my_error(ER_WRONG_VALUE, MYF(0), "server name", "");
+              MYSQL_YYABORT;
+            }
             Lex->server_options.server_name= $2.str;
             Lex->server_options.server_name_length= $2.length;
             Lex->server_options.scheme= $6.str;