port-amd64/46253: vnconfig -u paniced machine

[john%ziaspace.com@localhost]

>Number:         46253
>Category:       port-amd64
>Synopsis:       vnconfig -u paniced machine
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    port-amd64-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Mar 24 17:05:00 +0000 2012
>Originator:     John Klos
>Release:        NetBSD 6.0_BETA (16-March-2012)
>Organization:
        
>Environment:
        
        
System: NetBSD test.ziaspace.com 6.0_BETA NetBSD 6.0_BETA (GENERIC) amd64
Architecture: x86_64
Machine: amd64
>Description:
        
Used vnconfig to mount 1.4 MB floppy image. Mounted filesystem, did what 
  I needed to do, umounted, then attempted to use vnconfig -u. Machine 
  froze. When I got in front of the console, it had already rebooted.
>How-To-Repeat:
        
It's not known whether this is repeatable. I have not tried again.
>Fix:
        
Not known.

>Unformatted: