From: Marek Vavrusa <marek@vavrusa.com>
Date: Sun, 22 May 2016 03:59:59 +0000 (-0700)
Subject: lib/resolve: never read rcode if answer not exists
X-Git-Tag: v1.0.0~12
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=a41532e5682a1feb1e3193dfa1cc7399efca9d71;p=thirdparty%2Fknot-resolver.git

lib/resolve: never read rcode if answer not exists
---

diff --git a/lib/resolve.c b/lib/resolve.c
index 262351dc9..9d8c7e92c 100644
--- a/lib/resolve.c
+++ b/lib/resolve.c
@@ -471,7 +471,7 @@ int kr_resolve_consume(struct kr_request *request, const struct sockaddr *src, k
 				}
 			}
 			/* Do not complete NS address resolution on soft-fail. */
-			const int rcode = knot_wire_get_rcode(packet->wire);
+			const int rcode = packet ? knot_wire_get_rcode(packet->wire) : 0;
 			if (rcode != KNOT_RCODE_SERVFAIL && rcode != KNOT_RCODE_REFUSED) {
 				qry->flags &= ~(QUERY_AWAIT_IPV6|QUERY_AWAIT_IPV4);
 			} else { /* Penalize SERVFAILs. */