misc/72838: system freezes when trying to umount my digital camera without memory chip

[Mickey]

>Number:         72838
>Category:       misc
>Synopsis:       system freezes when trying to umount my digital camera without memory chip
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Oct 18 19:20:27 GMT 2004
>Closed-Date:
>Last-Modified:
>Originator:     Mickey
>Release:        5.1
>Organization:
>Environment:
FreeBSD guru 5.1-RELEASE FreeBSD 5.1-RELEASE #2: Tue Dec 30 09:19:53 EST 2003     mickey at guru:/usr/src/sys/i386/compile/NEW  i386

>Description:
      I have a nikon coolpix 2200 digital camera.  The camera has internal memory and a memory card in.  When the memory card is in it works fine.  I can plug the camera into the usb and type:
      #mount -t msdosfs /dev/da0s1 /cam
get what I need off the camera and then type
      #umount /cam
However, when there is no memory card in the camera the system cannot umount it.  Shortly after, the system freezes.
>How-To-Repeat:
      plug in the camera.  As root type
       #mount -t msdosfs /dev/da0s1 /cam
       #umount /cam

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