iwn0 hangs randomly when starting the machine

[Erich Dollansky]

Hi Adrian,

On Sat, 7 Jun 2014 21:41:10 -0400
Adrian Chadd <adrian at freebsd.org> wrote:

> Can you pleease chase this up with me next week? We need to find/fix
> these issues. I'm not running v6 at home; I can easily flip that on
> when I get home next week.
> 
sorry for being late. I was travelling myself until yesterday.

I updated my machine over the weekend to

FreeBSD X220.alogt.com 10.0-STABLE FreeBSD 10.0-STABLE #38 r267699: Sun
Jun 22 16:32:07 WITA 2014
erich at X220.alogt.com:/usr/obj/usr/src/sys/X220  amd64

I started it only a single time with IPV6 enabled and the machine
crashed again. It looked to me that it was the same location but I did
not verify it.

I run the machine since then with IPV4 only and did not have any
trouble. 

Maybe a word to the timezone. It seems that we are 12h apart. So, early
morning and early evening would be the best pairing for us. 

Erich


> THanks,
> 
> 
> -a
> 
> 
> On 7 June 2014 21:21, Erich Dollansky <erichsfreebsdlist at alogt.com>
> wrote:
> > Hi Adrian,
> >
> > On Fri, 23 May 2014 09:01:36 -0700
> > Adrian Chadd <adrian at freebsd.org> wrote:
> >
> >> a photo will be fine. :-)
> >>
> > did the photos help?
> >
> > I did not have any problems anymore since I deactivated IPV6.
> >
> > Erich
> >>
> >> -a
> >>
> >>
> >> On 23 May 2014 08:59, Erich Dollansky <erichsfreebsdlist at alogt.com>
> >> wrote:
> >> > Hi,
> >> >
> >> > On Fri, 23 May 2014 08:36:31 -0700
> >> > Adrian Chadd <adrian at freebsd.org> wrote:
> >> >
> >> >> Ok, it's a null pointer dereference (based on the address you
> >> >> posted) and it's ipv6 related. That's .. odd.
> >> >>
> >> >> Can you provide a backtrace from the crash?
> >> >>
> >> > I can try tomorrow. Am I right that I can only take photos of the
> >> > screen at this point of the boot process?
> >> >
> >> > Erich
> >> >>
> >> >>
> >> >> -a
> >> >>
> >> >>
> >> >> On 23 May 2014 04:13, Erich Dollansky
> >> >> <erichsfreebsdlist at alogt.com> wrote:
> >> >> > Hi,
> >> >> >
> >> >> > On Tue, 8 Apr 2014 20:40:01 -0700
> >> >> > Adrian Chadd <adrian at freebsd.org> wrote:
> >> >> >
> >> >> >> I'm not sure. I'd really like to see what the story is with
> >> >> >> coexistence somehow.
> >> >> >>
> >> >> > I did some more investigations and came to the result that iwn
> >> >> > crashes in 'in6_ifattach_linklocal'.
> >> >> >
> >> >> > When I disable ipv6, it all works fine. I did several reboots
> >> >> > without a problem.
> >> >> >
> >> >> > To make this a bit more complicated, if I use only em0, the
> >> >> > machine starts normal. When I use iwn0 alone or together with
> >> >> > lagg0 and em0, the machine crashes during the boot process.
> >> >> > The crashes only happen when IPV6 is enabled in rc.conf.
> >> >> >
> >> >> > Erich
> >> >
> >