netdev - Re: IPSec freeze

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Date:	Wed, 18 Jul 2007 01:58:42 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	Daniel.Beschorner@...ton.com
Cc:	kaber@...sh.net, netdev@...r.kernel.org, dada1@...mosbay.com
Subject: Re: IPSec freeze

From: "Beschorner Daniel" <Daniel.Beschorner@...ton.com>
Date: Tue, 17 Jul 2007 21:03:20 +0200

> > >>> I managed to reproduce a crash with ipcomp, will try to 
> > fix it later.
> > >>>       
> > >> Yes, I can confirm this.
> > >> After disabling IPComp the crashes went away.
> > >>     
> > > The crash happens in xfrm_bundle_ok when walking the bundle upwards
> > > following xfrm_dst->u.next. The loop should be stopped when
> > > xfrm_dst->u.next == first (the topmost xfrm_dst), but it points to
> > > NULL instead. I'm pretty sure the attached patch is responsible,
> > > it breaks XFRM's assumption that dst->next and xfrm_dst->u.next are
> > > the same pointer and xfrm_dst now shares the next pointer with
> > > rcu_head.next in struct dst_entry.
> > >
> > > Eric, could you look into this please?
> > 
> > I fixed it myself. Daniel, can you please test this patch?
> 
> Many thanks Patrick!!!
> I tested it and found it working!

Thank you for testing.
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