Herbert Xu wrote:
> Petersson, Mats <[EMAIL PROTECTED]> 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.
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