Re: [Fwd: assigning an address to ng_fec(4) iface causes panic]

From: Maksim Yevmenkin <maksim.yevmenkin_at_gmail.com>
Date: Tue, 23 Aug 2005 11:33:10 -0700
On 8/23/05, Brooks Davis <brooks_at_one-eyed-alien.net> wrote:
> On Tue, Aug 23, 2005 at 10:09:06AM -0700, Maksim Yevmenkin wrote:
> > Hello,
> >
> > please try the attached patch.
> >
> > > >Description:
> > >         assigning an address to ng_fec(4) iface causes panic
> > >         during dumping to dumpdev another panic occurs preventing to identify the source of the first panic and having the crash dump
> > >
> > >         ng_iface creation sequence:
> > >         mkpeer fec dummy fec
> > >         msg fec0: add_iface "em0"
> > >         msg fec0: add_iface "em1"
> > >         msg fec0: set_mode_mac
> > >
> 
> > --- ng_fec.c.orig     Mon Aug 22 11:42:51 2005
> > +++ ng_fec.c  Tue Aug 23 10:05:23 2005
> > _at__at_ -544,8 +544,8 _at__at_
> >       struct ifnet            *ifp, *bifp;
> >       struct ng_fec_portlist  *p;
> >
> > -     ifp = arg;
> > -     priv = ifp->if_softc;
> > +     priv = arg;
> > +     ifp = priv->ifp;
> >       b = &priv->fec_bundle;
> >
> >       if (b->fec_ifcnt == 1 || b->fec_ifcnt == 3) {
> 
> This isn't quite sufficent.  You also should change the ng_fec_init(ifp)
> call on line 718 to ng_fec_init(ifp->if_softc).  If that work's I'll
> commit it.

oops... i missed this. thanks for catching this! i do not have
hardware to test it :) i have attached updated path. if anyone could
please test it and confirm that it works then feel free to commit it
(or let me know and i can commit it myself :)

> I've got to say this calling convention is really stupid.  I'm
> really tempted to change ifp->if_init() to take a struct ifnet * even
> though it means an API change and a tree sweep.

sounds good to me.

thanks,
max

Received on Tue Aug 23 2005 - 16:33:12 UTC

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