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Date:   Sat, 31 Oct 2020 01:57:31 +0000
From:   Vadim Fedorenko <>
To:     Alexander Ovechkin <>
Cc:     Willem de Bruijn <>,
        Network Development <>,
        Tom Herbert <>
Subject: Re: [PATCH net] ip6_tunnel: set inner ipproto before ip6_tnl_encap.

On 30.10.2020 12:54, Alexander Ovechkin wrote:
> On 30 Oct 2020, at 14:01, Vadim Fedorenko <> wrote:
>> Could not reproduce the bug. Could you please provide a test scenario?
> It can be reproduced if your net device doesn’t support udp tunnel segmentation (i.e its features do not have SKB_GSO_UDP_TUNNEL).
> If you try to send packet larger than the MTU fou6-only tunnel (without any other encap) it will be dropped, because of invalid skb->inner_ipproto (that will be equal to IPPROTO_UDP — outer protocol, instead of IPPROTO_IPV6).
> skb->inner_ipproto is used here:
Ok, all my tests show that MPLS encap is working after this moving, so I have no 
concerns too.

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