From 2aef56cd240782dcd956be217ee5933a3317a724 Mon Sep 17 00:00:00 2001
From: Howard Chu <hyc@openldap.org>
Date: Tue, 1 Dec 2020 18:02:51 +0000
Subject: [PATCH] ITS#9411 fix thisUpdate check

---
 servers/slapd/schema_init.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/servers/slapd/schema_init.c b/servers/slapd/schema_init.c
index 689283f7fd..da477ad3da 100644
--- a/servers/slapd/schema_init.c
+++ b/servers/slapd/schema_init.c
@@ -3960,7 +3960,7 @@ issuerAndThisUpdateCheck(
 				/* empty */;
 			}
 
-			if ( x.bv_val[0] != '"' ) return LDAP_INVALID_SYNTAX;
+			if ( !x.bv_len || x.bv_val[0] != '"' ) return LDAP_INVALID_SYNTAX;
 			x.bv_val++;
 			x.bv_len--;