From 997678f5406ad9e275601960333313e5b829652d Mon Sep 17 00:00:00 2001
From: Brad Fitzpatrick <bradfitz@tailscale.com>
Date: Mon, 17 Feb 2020 11:28:07 -0800
Subject: [PATCH] wgengine/monitor: make Close not block forever on Linux

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
---
 wgengine/monitor/monitor_linux.go | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/wgengine/monitor/monitor_linux.go b/wgengine/monitor/monitor_linux.go
index 8dc75840b..e882e841d 100644
--- a/wgengine/monitor/monitor_linux.go
+++ b/wgengine/monitor/monitor_linux.go
@@ -6,6 +6,7 @@
 
 import (
 	"fmt"
+	"time"
 
 	"github.com/mdlayher/netlink"
 	"golang.org/x/sys/unix"
@@ -45,6 +46,7 @@ func newOSMon() (osMon, error) {
 }
 
 func (c *nlConn) Close() error {
+	c.conn.SetDeadline(time.Unix(0, 0)) // abort any Receive in flight
 	return c.conn.Close()
 }