kern/84336: instantly systemreboot when unmounting a powered off/unplugged+replugged USB device

[Oliver Lehmann]

>Number:         84336
>Category:       kern
>Synopsis:       instantly systemreboot when unmounting a powered off/unplugged+replugged USB device
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sat Jul 30 10:50:19 GMT 2005
>Closed-Date:
>Last-Modified:
>Originator:     Oliver Lehmann
>Release:        FreeBSD 6.0-BETA amd64
>Organization:
>Environment:
System: FreeBSD kartoffel.salatschuessel.net 6.0-BETA FreeBSD 6.0-BETA #0: Thu Jul 14 12:10:01 CEST 2005 olivleh1 at kartoffel.salatschuessel.net:/usr/obj/amd64-6.0/usr/src/sys/KARTOFFEL amd64


>Description:
	1. I mount my digitalcamera (USB) via mount_msdosfs
	2. My camera goes offline after some time of inactivity
	3. Trying to unmount the camera when it went off causes an instantly system reboot.

	The same happend with an USB harddrive I attach, mount, power off, unmount -> reboot

	"power off" can be replaced by unplug and replug - unmounting it then causes a reboot too
>How-To-Repeat:
	see description
>Fix:
	no idea
>Release-Note:
>Audit-Trail:
>Unformatted: