umount induced panic

[Mark Knight]

I just had a panic on RELENG_4 dated Feb 23rd.  The last few commands I
ran were:

  mount -r -t cd9660 /dev/cd1c /mnt
  cd /mnt ; grep -r refadsf .
  umount /mnt

The DVD I was testing had just been created on /dev/cd0c using
growisofs.

For gdb bt, kernel and dmesg please see:

  http://www.knigma.org.uk/~mkn/diag280204.txt

Cheers,
-- 
Mark A. R. Knight                               finger: markk at knigma.org
Tel: +44 7973 410732                            http://www.knigma.org/