Re: reproducible kernel crash with the agr interface

[Shoichi Yamaguchi <yamaguchi%netbsd.org@localhost>]

Hi,

This panic may be caused by adding an interface to agr(4)
after another interface is added to the agr(4) and deleted.

> ifconfig agr0 create
> ifconfig agr0 agrport wm1

ifp->if_hwdl of agr0 is created on adding wm1.

> ifconfig agr0 -agrport wm1

ifp->if_hwdl of agr0 is not deleted on it.

> ifconfig agr0 agrport bnx1

ifp->if_hwdl is created again, so the panic appears.

You may be able to use lagg(4) to avoid the panic.

% ifconfig lagg0 create
% ifconfig lagg0 laggproto lacp
% ifconfig lagg0 laggport wm1
% ifconfig lagg0 -laggport wm1
% ifconfig lagg0 laggport bnx1

-- yamaguchi