Re: tcp: kernel BUG at net/core/skbuff.c:3574!

On Tue, 2021-12-21 at 06:16 -0800, Eric Dumazet wrote:

On Tue, Dec 21, 2021 at 4:19 AM Ignat Korchagin [off-list ref] wrote:

quoted

Hi netdev,

While trying to reproduce a different rare bug we're seeing in
production I've triggered below on 5.15.9 kernel and confirmed on the
latest netdev master tree:

Nothing comes to mind. skb_shift() has not been recently changed.

Why are you disabling TSO exactly ?

Is GRO being used on veth needed to trigger the bug ?
(GRO was added recently to veth, I confess I did not review the patches)

This is very likely my fault. I'm investigating it right now.

Thanks for the head-up.

Paolo