ipn/ipnlocal: restore empty slice for extra dns records

Updates #2706 Updates #9377 Signed-off-by: James Tucker <james@tailscale.com>
2023-09-19 19:59:28 -07:00
1 changed files with 1 additions and 0 deletions
--- a/ipn/ipnlocal/local.go
+++ b/ipn/ipnlocal/local.go
@@ -3343,6 +3343,7 @@ func dnsConfigForNetmap(nm *netmap.NetworkMap, peers map[tailcfg.NodeID]tailcfg.
 		//
 		// While we're already populating it, might as well size the
 		// slice appropriately.
+		dcfg.Routes[fqdn] = make([]*dnstype.Resolver, 0, len(resolvers))
 		dcfg.Routes[fqdn] = append(dcfg.Routes[fqdn], resolvers...)
 	}