Re: Possible networking regression in 3.6.0

Eric Dumazet
2012-10-01T20:04:49Z

On Mon, 2012-10-01 at 16:01 -0400, David Miller wrote:
> From: Dave Jones <davej@redhat.com>
> Date: Mon, 1 Oct 2012 15:34:34 -0400
>
> > On Mon, Oct 01, 2012 at 11:15:50AM +0200, Eric Dumazet wrote:
> > > >
> > > > $ netstat -s
> > > > Icmp:
> > > > 4 ICMP messages received
> > > > 4 input ICMP message failed.
> > > > ICMP input histogram:
> > > > echo replies: 4
> > >
> > > So icmp replies come back and are delivered to host instead of being
> > > forwarded.
> > >
> > > I wonder if MASQUERADE broke...
> >
> > I hit something that sounds just like this a few months back..
> > http://lists.openwall.net/netdev/2012/07/25/53
> >
> > It "went away" a few builds later, but I've seen it happen
> > again from time to time.
>
> Yep I remembe that report.
>
> If you can find a way to more reliably trigger the case, that would
> help us immensely.

I am building a KMEMCHECK kernel, as a last try before my night ;)