kern/56252: wg(4) state machine has race conditions

[campbell+netbsd%mumble.net@localhost]

>Number:         56252
>Category:       kern
>Synopsis:       wg(4) state machine has race conditions
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Jun 16 23:35:00 +0000 2021
>Originator:     Taylor R Campbell
>Release:        9.99.x
>Organization:
The NetBSD Floundation
>Environment:
succumbing to climate change
>Description:
The wg(4) session establishment and rekeying state machine has race conditions, and the WireGuard specification it aims to follow isn't clear on how they are to be resolved.  Someone needs to figure out an appropriate resolution.
>How-To-Repeat:
atf-run /usr/tests/net/if_wg
>Fix:
Yes, please!