From 4d943536f152093085978adc06ab55e68bb75c53 Mon Sep 17 00:00:00 2001
From: Brad Fitzpatrick <bradfitz@tailscale.com>
Date: Wed, 27 Jan 2021 10:59:47 -0800
Subject: [PATCH] wgengine: don't leak TUN device in NewUserspaceEngine error
 path

Updates #1187

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

diff --git a/wgengine/userspace.go b/wgengine/userspace.go
index b206a84a6..5dbfd3f17 100644
--- a/wgengine/userspace.go
+++ b/wgengine/userspace.go
@@ -194,6 +194,7 @@ func NewUserspaceEngine(logf logger.Logf, tunname string, listenPort uint16) (En
 
 	e, err := NewUserspaceEngineAdvanced(conf)
 	if err != nil {
+		tun.Close()
 		return nil, err
 	}
 	return e, err