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From: Steffen Klassert <steffen.klassert@secunet.com>
To: Leon Romanovsky <leon@kernel.org>
Cc: "Günther Muller" <gunther.muller2008@gmail.com>,
	"Herbert Xu" <herbert@gondor.apana.org.au>,
	"David S. Miller" <davem@davemloft.net>,
	"Eric Dumazet" <edumazet@google.com>,
	"Jakub Kicinski" <kuba@kernel.org>,
	"Paolo Abeni" <pabeni@redhat.com>,
	"Simon Horman" <horms@kernel.org>,
	netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2] xfrm: fix missing headroom check in xfrm_dev_direct_output
Date: Wed, 20 May 2026 08:51:10 +0200	[thread overview]
Message-ID: <ag1Z3halPB-km3Sn@secunet.com> (raw)
In-Reply-To: <20260518123054.GS33515@unreal>

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!

  reply	other threads:[~2026-05-20  6:51 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-05-17 11:19 [PATCH] xfrm: fix missing headroom check in xfrm_dev_direct_output Günther Muller
2026-05-18  6:27 ` Steffen Klassert
2026-05-18  8:04 ` [PATCH v2] " Günther Muller
2026-05-18 12:30   ` Leon Romanovsky
2026-05-20  6:51     ` Steffen Klassert [this message]
2026-05-20  6:50   ` Steffen Klassert
  -- strict thread matches above, loose matches on Subject: below --
2026-05-18  8:23 Günther Muller

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