From ec8f6f82c20c617a3ea94478f2b5e4d49c6d3c2c Mon Sep 17 00:00:00 2001 From: James Tucker Date: Wed, 27 Sep 2023 14:52:21 -0700 Subject: tun: fix crash when ForceMTU is called after close Close closes the events channel, resulting in a panic from send on closed channel. Reported-By: Brad Fitzpatrick Signed-off-by: James Tucker Signed-off-by: Jason A. Donenfeld --- tun/tun_windows.go | 3 +++ 1 file changed, 3 insertions(+) diff --git a/tun/tun_windows.go b/tun/tun_windows.go index 0cb4ce1..34f2980 100644 --- a/tun/tun_windows.go +++ b/tun/tun_windows.go @@ -127,6 +127,9 @@ func (tun *NativeTun) MTU() (int, error) { // TODO: This is a temporary hack. We really need to be monitoring the interface in real time and adapting to MTU changes. func (tun *NativeTun) ForceMTU(mtu int) { + if tun.close.Load() { + return + } update := tun.forcedMTU != mtu tun.forcedMTU = mtu if update { -- cgit v1.2.3-54-g00ecf