net: Skip and warn of interfaces without bridge

Handle and warn about network interfaces which are not attached to
any bridge because the user actively removed it from the VM config.

Signed-off-by: Christian Ebner <c.ebner@proxmox.com>

diff --git a/PVE/QemuServer.pm b/PVE/QemuServer.pm
index ab33aa375b23878711f910e973c17d6fe3ca125c..f0c35ceb6624be7e4701d9e2686ba895d7ed0f5f 100644 (file)
--- a/PVE/QemuServer.pm
+++ b/PVE/QemuServer.pm
@@ -8576,6 +8576,10 @@ sub add_nets_bridge_fdb {
        }
 
        my $bridge = $net->{bridge};
+       if (!$bridge) {
+           log_warn("Interface '$iface' not attached to any bridge.");
+           next;
+       }
        if ($have_sdn) {
            PVE::Network::SDN::Zones::add_bridge_fdb($iface, $mac, $bridge, $net->{firewall});
        } elsif (-d "/sys/class/net/$bridge/bridge") { # avoid fdb management with OVS for now