netdev - Re: [PATCH] netdev: Use flexible array for trailing private bytes

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Message-ID: <202403061540.A8462E9@keescook>
Date: Wed, 6 Mar 2024 15:42:49 -0800
From: Kees Cook <keescook@...omium.org>
To: Jakub Kicinski <kuba@...nel.org>
Cc: Breno Leitao <leitao@...ian.org>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	"Gustavo A. R. Silva" <gustavoars@...nel.org>,
	netdev@...r.kernel.org, linux-hardening@...r.kernel.org,
	Simon Horman <horms@...nel.org>, Jiri Pirko <jiri@...nulli.us>,
	Daniel Borkmann <daniel@...earbox.net>,
	Coco Li <lixiaoyan@...gle.com>,
	Amritha Nambiar <amritha.nambiar@...el.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] netdev: Use flexible array for trailing private bytes

On Wed, Mar 06, 2024 at 07:06:58AM -0800, Jakub Kicinski wrote:
> On Wed, 6 Mar 2024 05:16:16 -0800 Breno Leitao wrote:
> > I've been looking at some of these embedders as reported by Kees[1], and
> > most of them are for dummy interfaces. I.e, they are basically used for
> > schedule NAPI poll.
> > 
> > From that list[1], most of the driver matches with:
> > 
> > 	# git grep init_dummy_netdev
> > 
> > That said, do you think it is still worth cleaning up embedders for
> > dummy net_devices?
> > 
> > [1] https://lore.kernel.org/all/202402281554.C1CEEF744@keescook/
> 
> Yes, I think so.
> Kees, did you plan to send a v2? Otherwise I can put the cleanup on our
> "public ToDo" list :)

I found the requested collateral changes that popped out of v1 to be
rather a bit much for me to tackle right now, so I think adding to the
TODO list is probably best. :)

-Kees

-- 
Kees Cook