Re: [PATCH v2] xfrm: fix missing headroom check in xfrm_dev_direct_output

[Steffen Klassert]

On Mon, May 18, 2026 at 03:30:54PM +0300, Leon Romanovsky wrote:
> On Mon, May 18, 2026 at 10:04:09AM +0200, Günther Muller wrote:
> > Ensure the skb has enough headroom for the hardware offload device's
> > hard_header_len. If the headroom is insufficient (e.g., when routing
> > through certain virtual or tunnel devices), __skb_push() underflows
> > skb->data below skb->head, causing silent memory corruption.
> 
> Could you please provide the steps required to reproduce the issue?

Please answer Leons question.

Thanks!