Re: [PATCH] net: fix wrong network header length

[Jakub Kicinski]

On Wed, 9 Feb 2022 18:25:07 +0800 lina.wang wrote:
> We use NETIF_F_GRO_FRAGLIST not for forwarding scenary, just for
> software udp gro. Whatever NETIF_F_GRO_FRAGLIST or NETIF_F_GRO_FWD,
> skb_segment_list should not have bugs.
> 
> We modify skb_segment_list, not in epbf. One point is traversing the
> segments costly, another is what @Maciej said, *other* helper may have
> the same problem. In skb_segment_list, it calls
> skb_headers_offset_update to update different headroom, which implys
> header maybe different.

Process notes:
 - the patch didn't apply so even if the discussion concludes that 
   the patch was good you'll need to rebase on netdev/net and repost;
 - please don't top post.