netdev - Re: [PATCH] xfrm: force flush upon NETDEV

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Message-ID: <CAHC9VhQ54LRD7k_x6tUju2kPVBEHcdgBh46_hBN8btG0vhfy_w@mail.gmail.com>
Date: Mon, 26 Jan 2026 17:41:46 -0500
From: Paul Moore <paul@...l-moore.com>
To: Steffen Klassert <steffen.klassert@...unet.com>
Cc: Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>, 
	Aviad Yehezkel <aviadye@...lnaox.com>, Aviv Heller <avivh@...lanox.com>, 
	Boris Pismenny <borisp@...lanox.com>, "David S. Miller" <davem@...emloft.net>, 
	Florian Westphal <fw@...len.de>, Guy Shapiro <guysh@...lanox.com>, Ilan Tayari <ilant@...lanox.com>, 
	Kristian Evensen <kristian.evensen@...il.com>, Leon Romanovsky <leon@...nel.org>, 
	Leon Romanovsky <leonro@...dia.com>, Raed Salem <raeds@...lanox.com>, Raed Salem <raeds@...dia.com>, 
	Saeed Mahameed <saeedm@...lanox.com>, Yossi Kuperman <yossiku@...lanox.com>, 
	Network Development <netdev@...r.kernel.org>, 
	linux-security-module <linux-security-module@...r.kernel.org>
Subject: Re: [PATCH] xfrm: force flush upon NETDEV_UNREGISTER event

On Thu, Jan 22, 2026 at 7:00 AM Steffen Klassert
<steffen.klassert@...unet.com> wrote:
> On Thu, Jan 22, 2026 at 05:24:22PM +0900, Tetsuo Handa wrote:

...

> > Therefore, I wonder what are security_xfrm_state_delete() and security_xfrm_policy_delete()
> > for. Can I kill xfrm_dev_state_flush_secctx_check() and xfrm_dev_policy_flush_secctx_check() ?
>
> This might violate a LSM policy then.

Exactly.  SELinux is currently the only LSM that enforces any access
controls on the XFRM/IPsec code, but it does use both of these LSM
hooks to authorize deletion of SPD/SA objects.

-- 
paul-moore.com