From 248d28671bf92c95b7499a8af87f6baa1e95eeeb Mon Sep 17 00:00:00 2001
From: Dmytro Shynkevych <dmytro@tailscale.com>
Date: Wed, 8 Jul 2020 20:07:05 -0400
Subject: [PATCH] tsdns: fix race in delegate

Signed-off-by: Dmytro Shynkevych <dmytro@tailscale.com>
---
 wgengine/tsdns/tsdns.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/wgengine/tsdns/tsdns.go b/wgengine/tsdns/tsdns.go
index 7f4b57c74..3536f018a 100644
--- a/wgengine/tsdns/tsdns.go
+++ b/wgengine/tsdns/tsdns.go
@@ -266,7 +266,7 @@ func (r *Resolver) delegate(query []byte) ([]byte, error) {
 	nameservers := r.nameservers
 	r.mu.RUnlock()
 
-	if len(r.nameservers) == 0 {
+	if len(nameservers) == 0 {
 		return nil, errAllFailed
 	}