kern/82905: mount_nullfs can reboot system

[Adrian Czerniak]

>Number:         82905
>Category:       kern
>Synopsis:       mount_nullfs can reboot system
>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 02 21:00:32 GMT 2005
>Closed-Date:
>Last-Modified:
>Originator:     Adrian Czerniak
>Release:        6-CURRENT
>Organization:
>Environment:
FreeBSD 68-71.is.net.pl 6.0-CURRENT FreeBSD 6.0-CURRENT #0: Sat Jul  2 15:27:02 CEST 2005     abaddon at 68-71.is.net.pl:/usr/obj/usr/src/sys/abaddon  i386
>Description:
Try to do:
mount_nullfs /mnt/foo /some/other/place (where foo is mounted fat32 partition) and enter to /some/other/place, system will reboot.
>How-To-Repeat:
mount_nullfs /mnt/foo /some/other/place (where foo is mounted fat32 partition) and enter to /some/other/place
>Fix:
      
>Release-Note:
>Audit-Trail:
>Unformatted: