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 <brad@tailscale.com> Signed-off-by: James Tucker <james@tailscale.com> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
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@ -127,6 +127,9 @@ func (tun *NativeTun) MTU() (int, error) {
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// TODO: This is a temporary hack. We really need to be monitoring the interface in real time and adapting to MTU changes.
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// TODO: This is a temporary hack. We really need to be monitoring the interface in real time and adapting to MTU changes.
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func (tun *NativeTun) ForceMTU(mtu int) {
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func (tun *NativeTun) ForceMTU(mtu int) {
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if tun.close.Load() {
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return
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}
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update := tun.forcedMTU != mtu
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update := tun.forcedMTU != mtu
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tun.forcedMTU = mtu
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tun.forcedMTU = mtu
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if update {
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if update {
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