usb/77315: unproperly detached (without unmounting) USB mass storage drive causes kernel panic

[MAB]

>Number:         77315
>Category:       usb
>Synopsis:       unproperly detached (without unmounting) USB mass storage drive causes kernel panic
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    freebsd-usb
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Feb 09 17:30:13 GMT 2005
>Closed-Date:
>Last-Modified:
>Originator:     MAB
>Release:        FreeBSD 5.3
>Organization:
Binar LLC
>Environment:
FreeBSD localhost.my.domain 5.3-RELEASE FreeBSD 5.3-RELEASE #4: Fri Jan  7 20:25:18 YEKT 2005     root at localhost.my.domain:/usr/obj/usr/src/sys/CUSTOM  i386
>Description:
      unproperly detached (without unmounting) USB mass storage drive causes kernel panic on reboot/shutdown and device special file (da[0-9]) don't disappear after detach (DEVFS enabled).

>How-To-Repeat:
      attach USB mass-storage drive, mount it, disconnect the drive without unmounting and reboot/shutdown the system.
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted: