kern/46923: Panic when I unplug an external usb mypassport hard drive.

[zac.3.14159%gmail.com@localhost]

>Number:         46923
>Category:       kern
>Synopsis:       Panic when I unplug an external usb mypassport hard drive.
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Sep 08 02:50:00 +0000 2012
>Originator:     Zachary Storer
>Release:        NetBSD-6.0 RC1
>Organization:
N/A
>Environment:
NetBSD 6.0-RC1 Generic (note I recently installed OpenBSD on this box, so this 
is not exact, but it was with a clean NetBSD-6.0RC1 install on amd64)
>Description:
When I plug in an external usb mypassport hard drive, then unplug it (even when 
unmounted), the system panics. This happens every time I do this. I see a 
beautiful screen of numbers scrolling past...
Here is a pastebin of images of the panic: http://inky.ws/g/1y8

>How-To-Repeat:
1. Install a generic NetBSD-6.0RC1 amd64 image.
2. Plug in an external usb hard drive (mypassport).
3. Unplug the external usb hard drive.
>Fix:
Unknown