From: James Chapman <jchap...@katalix.com>
Date: Mon, 12 Feb 2018 10:11:07 +0000

> Previously, if a tunnel was closed, we called inet_shutdown to mark
> the socket as unconnected such that userspace would get errors and
> then close the socket. This could race with userspace closing the
> socket. Instead, leave userspace to close the socket in its own time
> (our tunnel will be detached anyway).
> 
> Fixes: 309795f4be ("l2tp: Add netlink control API for L2TP")
 ...
>  BUG: unable to handle kernel NULL pointer dereference at 00000000000000a0
>  IP: __lock_acquire+0x263/0x1630

Ok, all of these are like this.

Please fix this up, put the kernel log message into the message body
and add an appropriate signoff.

Thank you.

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