kern/133902: Killing tun0 iface ssh tunnel causes Panic String: page fault

[Leonardo Santagostini]

>Number:         133902
>Category:       kern
>Synopsis:       Killing tun0 iface ssh tunnel causes Panic String: page fault
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Apr 22 04:00:03 UTC 2009
>Closed-Date:
>Last-Modified:
>Originator:     Leonardo Santagostini
>Release:        FreeBSD 7.0-RELEASE (GENERIC)
>Organization:
N/A
>Environment:
FreeBSD cobra4.local 7.0-RELEASE FreeBSD 7.0-RELEASE #0: Sun Feb 24 19:59:52 UTC 2008     root at logan.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC  i386

>Description:
When doing a ifconfig tun0 destroy on an interface which belongs to a ssh tunnel, causes system reboot.


>How-To-Repeat:
doing a ssh tunnel between 2 freebsd boxes.

machine A
  ssh -w 0:0 "machine B" true (after setting rsa authentication)
  ifconfig tun0 12.34.56.78 12.34.56.79

machine B
  ifconfig tun0 12.34.56.79 12.34.56.78

On machine A after the tunnel was created when a ifconfig tun0 it hangs the system

>Fix:


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