From 946f9dd1170be63b91e31ce825ea123f3c07329b Mon Sep 17 00:00:00 2001
From: Andreas Schneider <asn@samba.org>
Date: Wed, 8 Mar 2017 10:40:08 +0100
Subject: [PATCH] krb5_wrap: Do not return an empty realm from
 smb_krb5_get_realm_from_hostname()

BUG: https://bugzilla.samba.org/show_bug.cgi?id=12554

Pair-Programmed-With: Stefan Metzmacher <metze@samba.org>

Signed-off-by: Andreas Schneider <asn@samba.org>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
---
 lib/krb5_wrap/krb5_samba.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/krb5_wrap/krb5_samba.c b/lib/krb5_wrap/krb5_samba.c
index 8ebf601689b..780a7a4adf5 100644
--- a/lib/krb5_wrap/krb5_samba.c
+++ b/lib/krb5_wrap/krb5_samba.c
@@ -2715,7 +2715,9 @@ static char *smb_krb5_get_realm_from_hostname(TALLOC_CTX *mem_ctx,
 		goto out;
 	}
 
-	if (realm_list && realm_list[0]) {
+	if (realm_list != NULL &&
+	    realm_list[0] != NULL &&
+	    realm_list[0][0] != '\0') {
 		realm = talloc_strdup(mem_ctx, realm_list[0]);
 	}