kern/74635: [panic] vlan over fxp driver IP assignment crash

[Jonas Nagel]

>Number:         74635
>Category:       kern
>Synopsis:       [panic] vlan over fxp driver IP assignment crash
>Confidential:   no
>Severity:       critical
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri Dec 03 00:10:24 GMT 2004
>Closed-Date:
>Last-Modified:
>Originator:     Jonas Nagel
>Release:        5.3-RELEASE-p1 or 5.3-STABLE, Build date: 01.12.2004
>Organization:
-
>Environment:
>Description:
      After creating a vlan0 device and hooking it to the physical 
      device fxp0, assignment of an IP address results into a kernel 
      panic.

      Fatal trap 12: page fault while in kernel mode
      (did not have the chance to write down the entire crash message)

      The problem exists within a GENERIC kernel using the if_vlan.ko 
      kernel loadable module and also after compiling in 'device 
      vlan' into into a custom kernel. 

      I tried both 5.3-RELEASE and 5.3-STABLE kernel sources.

      The Hardware is a IBM ThinkPad R30, fxp0 is the built-in Intel NIC.
>How-To-Repeat:
     ifconfig vlan0 create
     ifconfig vlan0 vlan 1 vlandev fxp0
     ifconfig vlan0 inet 192.168.1.1 netmask 255.255.255.0

     I suspect the problem with the fxp driver because someone else 
     using a different driver on 5.3-RELEASE could not reproduce the 
     bug. Maybe it's even ThinkPad-specific.

     
>Fix:
      Unknown to me.
>Release-Note:
>Audit-Trail:
>Unformatted: