[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] kernel BUG at net/core/dev.c:1133!
Herbert Xu wrote: > Petersson, Mats <Mats.Petersson@xxxxxxx> wrote: > >>Looks like the GSO is involved? > > > It's certainly what crashed your machine :) It's probably not the > guilty party though. Someone is passing through a TSO packet with > checksum set to something other than CHECKSUM_HW. > > I bet it's netfilter and we just never noticed before because real > NICS would simply corrupt the checksum silently. > > Could you confirm that you have netfilter rules (in particular NAT > rules) and that this goes away if you flush all your netfilter tables? > > Patrick, do we really have to zap the checksum on outbound NAT? Could > we update it instead? Are you refering to this code in ip_nat_fn()? /* If we had a hardware checksum before, it's now invalid */ if ((*pskb)->ip_summed == CHECKSUM_HW) if (skb_checksum_help(*pskb, (out == NULL))) return NF_DROP; Doing incremental updates should work fine. This is something I wanted to take care of at some point, but didn't get to it yet. _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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