Re: KVM induced panic on 2.6.38[2367] & 2.6.39

[Brad Campbell]

On 08/06/11 06:57, Patrick McHardy wrote:
> On 07.06.2011 20:31, Eric Dumazet wrote:
> > Le mardi 07 juin 2011 à 17:35 +0200, Patrick McHardy a écrit :
> >
> > > The main suspects would be NAT and TCPMSS. Did you also try whether
> > > the crash occurs with only one of these these rules?
> > >
> > > > I've just compiled out CONFIG_BRIDGE_NETFILTER and can no longer access
> > > > the address the way I was doing it, so that's a no-go for me.
> > >
> > > That's really weird since you're apparently not using any bridge
> > > netfilter features. It shouldn't have any effect besides changing
> > > at which point ip_tables is invoked. How are your network devices
> > > configured (specifically any bridges)?
> >
> > Something in the kernel does
> >
> > u16 *ptr = addr (given by kmalloc())
> >
> > ptr[-1] = 0;
> >
> > Could be an off-one error in a memmove()/memcopy() or loop...
> >
> > I cant see a network issue here.
>
> So far me neither, but netfilter appears to trigger the bug.

Would it help if I tried some older kernels? This issue only surfaced 
for me recently as I only installed the VM's in question about 12 weeks 
ago and have only just started really using them in anger. I could try 
reproducing it on progressively older kernels to see if I can find one 
that works and then bisect from there.
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