XENUs crash on network activity.

[Marcin Jessa <lists%yazzy.org@localhost>]

Hi guys.

I updated my XEN2 kernels/base today to 3.99.20.
Whenever I try to connect to the world outside from my XENUs they just
reboot. Simple links or ftp will take down entire host...
Both of my XENU hosts run in vnode devices and their virtual network
interfaces are bridged with the same bridge0.
# brconfig -a
bridge0: flags=41<UP,RUNNING>
        Configuration:
                priority 32768 hellotime 2 fwddelay 15 maxage 20
                ipfilter disabled flags 0x0
        Interfaces:
                xvif2.0 flags=3<LEARNING,DISCOVER>
                        port 8 priority 128
                xvif1.0 flags=3<LEARNING,DISCOVER>
                        port 7 priority 128
                vlan0 flags=3<LEARNING,DISCOVER>
                        port 4 priority 128
        Address cache (max cache: 100, timeout: 1200):
                00:0c:42:04:90:81 vlan0 963 flags=0<>
                aa:00:00:50:02:f0 xvif2.0 879 flags=0<>
                aa:00:00:50:02:b3 xvif1.0 264 flags=0<>

The VLAN0 interface is 'attached' to re0 nic.

This setup worked very well until the kernel upgrade.
This is what happens when I log in to console and run ftp to fetch a
simple FDF document:

# ftp
http://www.yazzy.org/docs/Operating_Systems/BSD/NetBSD/Linux_to_Net>
Requesting
http://www.yazzy.org/docs/Operating_Systems/BSD/NetBSD/Linux_to_NetBSD.pdf
  0% |                                     |     0       0.00 KB/s   
--:-- ETA
fatal page fault in supervisor mode 
trap type 6 code 0 eip c0108efb cs 9 eflags 10206 cr2 0 ilevel 2 
panic: trap 
syncing disks... 3 3 3 3 3 1 done

dumping to dev 142,1 offset 328719
dump device bad

rebooting...


Cheers,
Marcin.