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Date: Wed, 08 Jun 2011 08:18:10 +0800 From: Brad Campbell <brad@...rfbargle.com> To: Patrick McHardy <kaber@...sh.net> CC: Eric Dumazet <eric.dumazet@...il.com>, Bart De Schuymer <bdschuym@...dora.be>, kvm@...r.kernel.org, linux-mm@...ck.org, linux-kernel@...r.kernel.org, netdev@...r.kernel.org, netfilter-devel@...r.kernel.org Subject: Re: KVM induced panic on 2.6.38[2367] & 2.6.39 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. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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