kern/60637: destroying a vlan interface with a configured parent interface hangs

["joe%ns1.eloisystems.com@localhost via gnats" <gnats-admin%NetBSD.org@localhost>]

>Number:         60637
>Category:       kern
>Synopsis:       destroying a vlan interface with a configured parent interface hangs
>Confidential:   no
>Severity:       critical
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Aug 24 20:30:00 +0000 2026
>Originator:     Emmanuel Nyarko
>Release:        NetBSD 11
>Organization:
NetBSD
>Environment:
amd64 x86
>Description:

The usual procedure to configuring a vlan interface is 

create the vlan interface, configure it with a vlan ID and a parent

when shutting it down, 

unconfigure it
and 
destroy it and this works without hanging.

but running destroy when not unconfigured hangs. 
>How-To-Repeat:

ifconfig vlan0 create
ifconfig vlan0 vlan 6 vlanif $interface
ifconfig vlan0 destroy
>Fix:
Not yet!