Fix NODATA instead of NXDOMAIN (#1674067)

Fix bug added in 2.80 non-terminal code which returns NODATA instead of NXDOMAIN.

Thanks to Sven Muleller and Maciej Żenczykowski for work on this.

dnsmasq-2.80-rh1674067.patch

@@ -0,0 +1,31 @@
+From 162e5e0062ce923c494cc64282f293f0ed64fc10 Mon Sep 17 00:00:00 2001
+From: Sven Mueller <smu@google.com>
+Date: Wed, 27 Feb 2019 21:17:37 +0000
+Subject: [PATCH] Fix bug added in 2.80 non-terminal code which returns NODATA
+ instead of NXDOMAIN.
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Thanks to Sven Muleller and Maciej Żenczykowski for work on this.
+
+https://bugzilla.redhat.com/show_bug.cgi?id=1674067 refers.
+---
+ src/cache.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/src/cache.c b/src/cache.c
+index 906f5e1..44c13e4 100644
+--- a/src/cache.c
++++ b/src/cache.c
+@@ -790,6 +790,7 @@ int cache_find_non_terminal(char *name, time_t now)
+     if (!is_outdated_cname_pointer(crecp) &&
+ 	!is_expired(now, crecp) &&
+ 	(crecp->flags & F_FORWARD) &&
++	!(crecp->flags & F_NXDOMAIN) && 
+ 	hostname_isequal(name, cache_get_name(crecp)))
+       return 1;
+ 
+-- 
+2.20.1
+

dnsmasq.spec

@@ -13,7 +13,7 @@
 
 Name:           dnsmasq
 Version:        2.80
-Release:        5%{?extraversion:.%{extraversion}}%{?dist}
+Release:        6%{?extraversion:.%{extraversion}}%{?dist}
 Summary:        A lightweight DHCP/caching DNS server
 
 License:        GPLv2 or GPLv3
@@ -26,6 +26,8 @@ Source2:        dnsmasq-systemd-sysusers.conf
 Patch1:         dnsmasq-2.77-underflow.patch
 Patch3:         dnsmasq-2.78-fips.patch
 Patch5:         dnsmasq-2.79-randomize-ports.patch
+# https://bugzilla.redhat.com/show_bug.cgi?id=1674067
+Patch6:         dnsmasq-2.80-rh1674067.patch
 
 # This is workaround to nettle bug #1549190
 # https://bugzilla.redhat.com/show_bug.cgi?id=1549190
@@ -158,6 +160,9 @@ install -Dpm 644 %{SOURCE2} %{buildroot}%{_sysusersdir}/%{name}.conf
 %{_mandir}/man1/dhcp_*
 
 %changelog
+* Wed Jul 24 2019 Petr Menšík <pemensik@redhat.com> - 2.80-6
+- Do not return NXDOMAIN on empty non-terminals (#1674067)
+
 * Wed Jul 24 2019 Fedora Release Engineering <releng@fedoraproject.org> - 2.80-5
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild