Re: [Xen-devel] [PATCH net] xen-netback: make sure skb linear area covers checksum field

[David Miller <davem@xxxxxxxxxxxxx>]

From: Paul Durrant <paul.durrant@xxxxxxxxxx>
Date: Wed, 11 Dec 2013 16:37:40 +0000

> skb_partial_csum_set requires that the linear area of the skb covers the
> checksum field. The checksum setup code in netback was only doing that
> pullup in the case when the pseudo header checksum was being recalculated
> though. This patch makes that pullup unconditional. (I pullup the whole
> transport header just for simplicity; the requirement is only for the check
> field but in the case of UDP this is the last field in the header and in the
> case of TCP it's the last but one).
> 
> The lack of pullup manifested as failures running Microsoft HCK network
> tests on a pair of Windows 8 VMs and it has been verified that this patch
> fixes the problem.
> 
> Signed-off-by: Paul Durrant <paul.durrant@xxxxxxxxxx>

Applied, thank you.

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