From 17d7ee79f23c26d23f77ce31e11485deaf247a31 Mon Sep 17 00:00:00 2001
From: Willem Toorop <willem@nlnetlabs.nl>
Date: Wed, 20 Sep 2017 12:44:14 +0200
Subject: [PATCH] Fix NULL pointer dereference

---
 src/dnssec.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/dnssec.c b/src/dnssec.c
index 4079ae4f..da0f92b1 100644
--- a/src/dnssec.c
+++ b/src/dnssec.c
@@ -2770,7 +2770,7 @@ static void chain_clear_netreq_dnssec_status(chain_head *chain)
 
 		head->netreq->dnssec_status = GETDNS_DNSSEC_INDETERMINATE;
 		for ( node_count = head->node_count, node = head->parent
-		    ; node_count ; node_count--, node = node->parent ) {
+		    ; node && node_count ; node_count--, node = node->parent ) {
 
 			node->ds_signer = -1;
 			node->dnskey_signer = -1;