Reproducible panic: ndis, broadcom 4318

This happens on a new install (7.1-RELEASE upgraded to 8.0-BETA2 using
freebsd-update).  No changes have been made to the system aside from
rc.conf edits and copying an existing kernel module for ndis0 from a
backup.  The machine panics within a few seconds of loading
bcmwl5_sys.ko, with or without wpa_supplicant enabled.

There is no kernel.debug for me to run kgdb against.  I cannot get the
system connected to the net to do a recent checkout of the tree, but I
will try to build a debug kernel on another machine and copy it with a
flash drive.


phoenix# kgdb kernel /var/crash/vmcore.0
GNU gdb 6.1.1 [FreeBSD]
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i386-marcel-freebsd"...

Unread portion of the kernel message buffer:


Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address   = 0x2ac
fault code              = supervisor read, page not present
instruction pointer     = 0x20:0xc54e0ea6
stack pointer           = 0x28:0xe7847a74
frame pointer           = 0x28:0xe7847ac8
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 711 (wpa_supplicant)
panic: from debugger
cpuid = 0
Uptime: 5m7s
Physical memory: 1511 MB
Dumping 70 MB: 55 39 23 7

Reading symbols from /boot/kernel/snd_hda.ko...Reading symbols from /boot/kernel
/snd_hda.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/snd_hda.ko
Reading symbols from /boot/kernel/sound.ko...Reading symbols from /boot/kernel/s
ound.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/sound.ko
Reading symbols from /boot/modules/bcmwl5_sys.ko...done.
Loaded symbols for /boot/modules/bcmwl5_sys.ko
Reading symbols from /boot/kernel/if_ndis.ko...Reading symbols from /boot/kernel
/if_ndis.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/if_ndis.ko
Reading symbols from /boot/kernel/ndis.ko...Reading symbols from /boot/kernel/nd
is.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/ndis.ko
kgdb: kvm_read: invalid address (0x0)
#0  0x00000000 in ?? ()

-- 
Glen Barber