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

From: Eric Dumazet
Date: Tue Jun 07 2011 - 14:31:41 EST

Le mardi 07 juin 2011 Ã 17:35 +0200, Patrick McHardy a Ãcrit :

> 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.

I checked arch/x86/lib/memmove_64.S and it seems fine.

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