Kernel panic with if_sf.ko
Jung-uk Kim
jkim at FreeBSD.org
Wed Jul 1 21:37:25 UTC 2009
On Wednesday 01 July 2009 04:17 pm, Robert Watson wrote:
> 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...
It was about a month ago. I had funny impression that you and sam
were working on it cause it started happening when sam added bpf
detach event handler and MAC was enabled by default. Any way, I will
let you know if I can reproduce the problem.
Jung-uk Kim
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