On Fri, 2017-04-28 at 09:13 +0200, Steffen Klassert wrote: > encap type espinudp sport 4500 dport 4500 addr 0.0.0.0 > > Ok, this is espinudp. This information was important.
> This is not a GRO issue as I thought, the TX side is already broken. > > Could you please try the patch below? > > Subject: [PATCH] esp4: Fix udpencap for local TCP packets. > > Locally generated TCP packets are usually cloned, so we > do skb_cow_data() on this packets. After that we need to > reload the pointer to the esp header. On udpencap this > header has an offset to skb_transport_header, so take this > offset into account. It looks like locally generated TCP packets could avoid the skb_cow_data(), if you were using skb_header_cloned() instead of skb_cloned() ?
