netdev - Re: [PATCH] xfrm: Use xfrm_state selector for BEET input

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Message-ID: <ZIcFnC/W7i6/Nu2C@gauss3.secunet.de>
Date: Mon, 12 Jun 2023 13:46:36 +0200
From: Steffen Klassert <steffen.klassert@...unet.com>
To: Herbert Xu <herbert@...dor.apana.org.au>
CC: <netdev@...r.kernel.org>, David George <David.George@...hos.com>, "Markus
 Trapp" <markus.trapp@...unet.com>
Subject: Re: [PATCH] xfrm: Use xfrm_state selector for BEET input

On Wed, Jun 07, 2023 at 04:38:47PM +0800, Herbert Xu wrote:
> On Tue, Jun 06, 2023 at 12:45:29PM +0200, Steffen Klassert wrote:
> >
> > the assumption that the L4 protocol on BEET mode can be
> > just IPIP or BEETPH seems not to be correct. One of
> > our testcaces hit the second WARN_ON_ONCE() in
> > xfrm_prepare_input. In that case the L4 protocol
> > is UDP. Looks like we need some other way to
> > dertermine the inner protocol family.
> 
> Oops, that was a thinko on my part:
> 
> ---8<---
> For BEET the inner address and therefore family is stored in the
> xfrm_state selector.  Use that when decapsulating an input packet
> instead of incorrectly relying on a non-existent tunnel protocol.
> 
> Fixes: 5f24f41e8ea6 ("xfrm: Remove inner/outer modes from input path")
> Reported-by: Steffen Klassert <steffen.klassert@...unet.com>
> Signed-off-by: Herbert Xu <herbert@...dor.apana.org.au>

Applied, thanks a lot Herbert!