usb/91519: fatal & reboot

[Zeus]

>Number:         91519
>Category:       usb
>Synopsis:       fatal & reboot
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    freebsd-usb
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sun Jan 08 17:40:03 GMT 2006
>Closed-Date:
>Last-Modified:
>Originator:     Zeus
>Release:        6.0R
>Organization:
local
>Environment:
FreeBSD  6.0-RELEASE FreeBSD 6.0-RELEASE #0: Thu Nov  3 09:36:13 UTC 2005     root at x64.samsco.home:/usr/obj/usr/src/sys/GENERIC  i386
>Description:
              when I plug USB harddisk and mount it, it work ok.But I don't umount it before I unplug. System will note you. Then if you umount folder, system will show "fatal message..." & reboot automatically.
>How-To-Repeat:
              
>Fix:
              
>Release-Note:
>Audit-Trail:
>Unformatted: