kern/106400: fatal trap 12 at restart of PF with ALTQ if ng0 device has detached

[Max Laier]

On Wednesday 06 December 2006 14:20, Volker wrote:
> The following reply was made to PR kern/106400; it has been noted by
> GNATS.
>
> From: Volker <volker at vwsoft.com>
> To: bug-followup at FreeBSD.org,  bst2006 at dva.dyndns.org
> Cc:
> Subject: Re: kern/106400: fatal trap 12 at restart of PF with ALTQ if
> ng0 device has detached
> Date: Wed, 06 Dec 2006 14:16:42 +0100
>
>  First I would suggest to use ALTQ w/ mpd not on ng0 but on the real
>  physical interface (for example fxp0, xl0) which is being used by
>  netgraph/mpd.
>
>  On the other side I also do have trouble using ALTQ with mpd but I'm
>  using mpd for a 3G connection (based on a tty device, not a NIC).
>
>  Avoiding ALTQ rules in pf.conf for the ng0 interface (not using ALTQ
>  on ng0) doesn't produce a fatal trap 12. So disabling ALTQ in your
>  kernel is not the only workaround. You may still use ALTQ on your
>  internal NIC without a trap.
>
>  Unlike your experience, I always do experience a kernel trap when
>  reloading pf rules w/ ALTQ on ng0 (whether or not pf rules are
>  reloaded by a script or manually).
>
>  This also occours while the ng0 interface is still there and from my
>  experience it's not related to a reload of mpd.

Can you provide a trace for this panic?  I have a good understanding of 
the issue in the PR, but your problem seems to be quite different if the 
ng0 device really doesn't go away meanwhile.  More details would be 
required.

-- 
/"\  Best regards,                      | mlaier at freebsd.org
\ /  Max Laier                          | ICQ #67774661
 X   http://pf4freebsd.love2party.net/  | mlaier at EFnet
/ \  ASCII Ribbon Campaign              | Against HTML Mail and News
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 187 bytes
Desc: not available
Url : http://lists.freebsd.org/pipermail/freebsd-pf/attachments/20061206/a4630946/attachment.pgp