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Date:      Tue, 12 Nov 2002 16:23:20 -0500
From:      Girish Chandran <gchandran@newtecamerica.com>
To:        freebsd-bugs@FreeBSD.org
Subject:   Fatal Trap 12: Page fault while in kernel mode
Message-ID:  <3DD17148.2090609@newtecamerica.com>

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Hi,

I modified the GENERIC kernel with the following options
options BRIDGE
options IPFIREWALL
options IPFIREWALL_VERBOSE
options IPFIREWALL_VERBOSE_LIMIT=10
options DUMMYNET

I added the following lines to /etc/sysctl.conf
net.link.ether.bridge=1
net.link.ether.bridge_ipfw=1
The kernel compiled fine and I was able to boot

Then I added the following to /etc/sysctl.conf
net.link.ether.bridge_cfg=fxp0,em0
and a line to /boot/loader.conf
bridge_conf="YES"

Now I cannot boot into the system!!
I am getting the following message during boot:

net.link.ether.bridge_cfg
Fatal Trap 12: Page fault while in kernel mode
fault virtual address   0x10
fault code                   supervisor read, page not present
instruction pointer:    0x80:0xc0229f5b
stack pointer              0x10: 0xcdcdf9f8
frame pointer             0x10: 0xcdcdfa04
code segment             base 0x0 limit 0xfffff, type 0x1b
                                   DPL0 , pres 1, def32 1, gran 1
process eflags            interrupt enabled, resume, IOPL=0
code segment
current process          39 (sysctl)
interrupt mask          none
trap number               12
panic: page fault

syncing disks...6 3 2 2
done
Automatic reboot in 15 seconds

The problem appears to be the statement that I added to sysctl.conf. Can 
someone help?
How do I boot back into the system?

Thanks
Girish



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