From: Stephen Hemminger <shemminger@linux-foundation.org>
To: David Miller <davem@davemloft.net>
Cc: 625914@bugs.debian.org, noahm@debian.org,
bridge@lists.linux-foundation.org, ben@decadent.org.uk,
netdev@vger.kernel.org
Subject: Re: [Bridge] Bug#625914: linux-image-2.6.38-2-amd64: bridging is not interacting well with multicast in 2.6.38-4
Date: Thu, 12 May 2011 16:28:10 -0700 [thread overview]
Message-ID: <20110512162810.34b8d55a@nehalam> (raw)
In-Reply-To: <20110512.155916.115945119.davem@davemloft.net>
On Thu, 12 May 2011 15:59:16 -0700 (PDT)
David Miller <davem@davemloft.net> wrote:
> From: Noah Meyerhans <noahm@debian.org>
> Date: Tue, 10 May 2011 16:35:40 -0700
>
> > On Tue, May 10, 2011 at 03:11:00PM -0700, Stephen Hemminger wrote:
> >> There were two more follow on commits in stable related to this.
> >> I recommend merging 2.6.38.6 which includes these.
> >
> > The problem still exists in the current 2.6.38.6. Backing out 5f1c356a
> > still solves the problem there.
> >
> > I have not yet tried anything outside the stable-2.6.38.y tree, but it
> > seems like these same changes are present there, and it's unlikely that
> > other releases will work any better.
>
> So the issue is that if we back out that change, we get crashes.
>
> Aparently there is a code path where whatever is existing in the
> SKB ip options block matters, and needs to be maintained.
>
> Someone needs to audit all of this and figure out how to fix the
> problem properly.
> --
> To unsubscribe from this list: send the line "unsubscribe netdev" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
I suspect tuntap is part of the problem. The skb may not be
allocated with enough padding or something like that. No guarantees
but will do some investigation.
--
WARNING: multiple messages have this Message-ID (diff)
From: Stephen Hemminger <shemminger@linux-foundation.org>
To: David Miller <davem@davemloft.net>
Cc: noahm@debian.org, ben@decadent.org.uk, 625914@bugs.debian.org,
bridge@lists.linux-foundation.org, netdev@vger.kernel.org
Subject: Re: [Bridge] Bug#625914: linux-image-2.6.38-2-amd64: bridging is not interacting well with multicast in 2.6.38-4
Date: Thu, 12 May 2011 16:28:10 -0700 [thread overview]
Message-ID: <20110512162810.34b8d55a@nehalam> (raw)
In-Reply-To: <20110512.155916.115945119.davem@davemloft.net>
On Thu, 12 May 2011 15:59:16 -0700 (PDT)
David Miller <davem@davemloft.net> wrote:
> From: Noah Meyerhans <noahm@debian.org>
> Date: Tue, 10 May 2011 16:35:40 -0700
>
> > On Tue, May 10, 2011 at 03:11:00PM -0700, Stephen Hemminger wrote:
> >> There were two more follow on commits in stable related to this.
> >> I recommend merging 2.6.38.6 which includes these.
> >
> > The problem still exists in the current 2.6.38.6. Backing out 5f1c356a
> > still solves the problem there.
> >
> > I have not yet tried anything outside the stable-2.6.38.y tree, but it
> > seems like these same changes are present there, and it's unlikely that
> > other releases will work any better.
>
> So the issue is that if we back out that change, we get crashes.
>
> Aparently there is a code path where whatever is existing in the
> SKB ip options block matters, and needs to be maintained.
>
> Someone needs to audit all of this and figure out how to fix the
> problem properly.
> --
> To unsubscribe from this list: send the line "unsubscribe netdev" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
I suspect tuntap is part of the problem. The skb may not be
allocated with enough padding or something like that. No guarantees
but will do some investigation.
--
next prev parent reply other threads:[~2011-05-12 23:28 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20110506201234.6297.70279.reportbug@ip6-localhost>
2011-05-10 2:38 ` [Bridge] Bug#625914: linux-image-2.6.38-2-amd64: bridging is not interacting well with multicast in 2.6.38-4 Ben Hutchings
2011-05-10 2:38 ` Ben Hutchings
2011-05-10 3:15 ` [Bridge] " Stephen Hemminger
2011-05-10 3:15 ` Stephen Hemminger
2011-05-10 4:38 ` [Bridge] " Noah Meyerhans
2011-05-10 4:38 ` Noah Meyerhans
2011-05-10 12:42 ` [Bridge] " Ben Hutchings
2011-05-10 12:42 ` Ben Hutchings
2011-05-10 12:55 ` Yann Dupont
2011-05-10 18:05 ` [Bridge] " Noah Meyerhans
2011-05-10 18:05 ` Noah Meyerhans
2011-05-10 22:11 ` [Bridge] " Stephen Hemminger
2011-05-10 22:11 ` Stephen Hemminger
2011-05-10 23:35 ` Noah Meyerhans
2011-05-10 23:35 ` Noah Meyerhans
2011-05-12 22:59 ` David Miller
2011-05-12 22:59 ` David Miller
2011-05-12 23:28 ` Stephen Hemminger [this message]
2011-05-12 23:28 ` Stephen Hemminger
2011-05-12 23:43 ` Stephen Hemminger
2011-05-12 23:43 ` Stephen Hemminger
2011-05-13 5:03 ` Noah Meyerhans
2011-05-13 5:03 ` Noah Meyerhans
2011-05-13 18:03 ` Stephen Hemminger
2011-05-13 18:03 ` Stephen Hemminger
2011-05-13 19:53 ` [Bridge] [PATCH] bridge: fix forwarding of IPv6 Stephen Hemminger
2011-05-13 19:53 ` Stephen Hemminger
2011-05-13 20:00 ` [Bridge] " Eric Dumazet
2011-05-13 20:00 ` Eric Dumazet
2011-05-13 20:02 ` [Bridge] " David Miller
2011-05-13 20:02 ` David Miller
2011-05-13 20:05 ` [Bridge] " Eric Dumazet
2011-05-13 20:05 ` Eric Dumazet
2011-05-13 20:24 ` [Bridge] " Stephen Hemminger
2011-05-13 20:03 ` David Miller
2011-05-13 20:03 ` David Miller
2011-05-13 21:00 ` [Bridge] " Noah Meyerhans
2011-05-13 21:00 ` Noah Meyerhans
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