libvirt/network-don-t-use-dhcp-authoritative-on-static-netwo.patch
James Fehlig 48654de6e4 Accepting request 903563 from home:jfehlig:branches:Virtualization
-  Update to libvirt 7.5.0
  - security: Fix insecure sVirt label generation - CVE-2021-3631
    bsc#1187871
  - apparmor: Permit new capabilities required by libvirtd
    boo#1186888
  - Many incremental improvements and bug fixes, see
    https://libvirt.org/news.html
  - Dropped patches:
    suse-apparmor-libnl-paths.patch
- supportconfig plugin improvements

OBS-URL: https://build.opensuse.org/request/show/903563
OBS-URL: https://build.opensuse.org/package/show/Virtualization/libvirt?expand=0&rev=895
2021-07-01 17:24:26 +00:00

52 lines
2.4 KiB
Diff

From 15c7f9a6e7678238ef06f5d805984addb6f8bcdb Mon Sep 17 00:00:00 2001
From: Martin Wilck <mwilck@suse.com>
Date: Thu, 15 Dec 2016 10:17:05 +0100
Subject: [PATCH] network: don't use dhcp-authoritative on static networks
"Static" DHCP networks are those where no dynamic DHCP range is
defined, only a list of host entries is used to serve permanent
IP addresses. On such networks, we don't want dnsmasq to reply
to other requests than those statically defined. But
"dhcp-authoritative" will cause dnsmasq to do just that.
Therefore we can't use "dhcp-authoritative" for static networks.
Fixes: 4ac20b3ae "network: add dnsmasq option 'dhcp-authoritative'"
Signed-off-by: Martin Wilck <mwilck@suse.com>
---
src/network/bridge_driver.c | 9 ++++++++-
tests/networkxml2confdata/dhcp6host-routed-network.conf | 1 -
2 files changed, 8 insertions(+), 2 deletions(-)
Index: libvirt-7.5.0/src/network/bridge_driver.c
===================================================================
--- libvirt-7.5.0.orig/src/network/bridge_driver.c
+++ libvirt-7.5.0/src/network/bridge_driver.c
@@ -1482,7 +1482,14 @@ networkDnsmasqConfContents(virNetworkObj
if (VIR_SOCKET_ADDR_IS_FAMILY(&ipdef->address, AF_INET)) {
if (ipdef->nranges || ipdef->nhosts) {
virBufferAddLit(&configbuf, "dhcp-no-override\n");
- virBufferAddLit(&configbuf, "dhcp-authoritative\n");
+ /*
+ * Use "dhcp-authoritative" only for dynamic DHCP.
+ * In a static-only network, it would cause dnsmasq
+ * to reply to requests from other hosts than those
+ * statically defined.
+ */
+ if (ipdef->nranges || !ipdef->nhosts)
+ virBufferAddLit(&configbuf, "dhcp-authoritative\n");
}
if (ipdef->tftproot) {
Index: libvirt-7.5.0/tests/networkxml2confdata/dhcp6host-routed-network.conf
===================================================================
--- libvirt-7.5.0.orig/tests/networkxml2confdata/dhcp6host-routed-network.conf
+++ libvirt-7.5.0/tests/networkxml2confdata/dhcp6host-routed-network.conf
@@ -10,7 +10,6 @@ bind-dynamic
interface=virbr1
dhcp-range=192.168.122.1,static
dhcp-no-override
-dhcp-authoritative
dhcp-range=2001:db8:ac10:fd01::1,static,64
dhcp-hostsfile=/var/lib/libvirt/dnsmasq/local.hostsfile
addn-hosts=/var/lib/libvirt/dnsmasq/local.addnhosts