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Date:   Thu, 22 Jun 2017 12:52:13 +0200
From:   Steffen Klassert <>
To:     <>
CC:     <>, Herbert Xu <>,
        Yevgeny Kliteynik <>,
        Boris Pismenny <>,
        Ilan Tayari <>
Subject: Re: [PATCH net v2 2/2] esp6_offload: Fix IP6CB(skb)->nhoff for ESP

On Thu, Jun 22, 2017 at 11:37:11AM +0300, wrote:
> From: Yossi Kuperman <>
> IP6CB(skb)->nhoff is the offset of the nexthdr field in an IPv6
> header, unless there are extension headers present, in which case
> nhoff points to the nexthdr field of the last extension header.
> In non-GRO code path, nhoff is set by ipv6_rcv before any XFRM code
> is executed. Conversely, in GRO code path (when esp6_offload is loaded),
> nhoff is not set. The following functions fail to read the correct value
> and eventually the packet is dropped:
>     xfrm6_transport_finish
>     xfrm6_tunnel_input
>     xfrm6_rcv_tnl
> Set nhoff to the proper offset of nexthdr in esp6_gro_receive.
> Fixes: 7785bba299a8 ("esp: Add a software GRO codepath")
> Signed-off-by: Yossi Kuperman <>

Both patches applied, thanks for your work Yossi!

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