On Sat, Apr 13, 2002 at 12:44:36PM -0400, John Baldwin wrote:
> Can you get a backtrace in ddb?  It looks like a null pointer dereference, and
> knowing where it happened would help.  Finding the file and line of the
> instruction pointer using addr2line on kernel.debug would be helpful as well.

It *is* a null pointer deref.  Joe and I looked at this problem,
and it seems a function called device_get_ivars() isn't doing
its job in sys/dev/usb/usb_port.h.  So the variable is getting
filled with a NULL pointer for the iface element and is later
deref'd.  That's the limit of my debugging, and Joe is looking
into the problem actively.


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