Kernel panic with if_sf.ko
Robert Watson
rwatson at FreeBSD.org
Wed Jul 1 20:17:26 UTC 2009
On Wed, 1 Jul 2009, Jung-uk Kim wrote:
> On Wednesday 01 July 2009 12:21 pm, Alexey Dokuchaev wrote:
>
>> I've started to observe the following rather annoying panic if I boot with
>> if_sf loaded (via loader.conf) and having sf0 configured via DHCP on recent
>> -CURRENT. If I comment out driver from loader.conf and load it manually
>> (via kldload(8)) after system boots, it loads and gets configured just
>> fine.
>>
>> Any clues here? Attached is relevant dmesg + DDB trace (debug kernel with
>> WITNESS). I'm happy to provide any additional information (that is,
>> ps/show uma/malloc, whatever).
>
> Last time I checked, bpf(4) with MAC caused a similar problem when it is
> destroying bpf descriptor label. GENERIC includes MAC by default now. If
> you don't need MAC, try removing "options MAC" from your kernel
> configuration.
I was not aware of this problem -- could you provide some more details? Any
panic caused by having MAC in the kernel is a bug...
Robert N M Watson
Computer Laboratory
University of Cambridge
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