Kernel panic from interface address list manipulation

[Bjoern A. Zeeb]

On Fri, 20 Aug 2010, Nima Misaghian wrote:

>
>> Hey,
>>
>>> I've been able to trivially
>>> trigger a kernel panic while testing ifaddr list manipulation on -CURRENT (r
>>> 211427).  The hardware is a four-core i386
>>> machine with em interfaces.
>>
>> The diff should give you an idea of what's going wrong.  I am not sure
>> if I would want to actually commit it as-is.
>>
>> http://people.freebsd.org/~bz/20100819-01-in_control.diff
>>
>
> I could not reproduce the panic after applying the patch.
> Thanks for taking the time to look into this issue and fixing it.

FYI: there seems to be another race issue with in_ifinit() that I find
when running a script similar to yours for long enough.  I'll try to
have a look.

/bz

-- 
Bjoern A. Zeeb                       This signature is about you not me.