linux-kernel - Re: [PATCH 23/39] Annotate hardware config module parameters in drivers/net/wireless/

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Message-ID: <8737i6syzq.fsf@kamboji.qca.qualcomm.com>
Date:   Fri, 02 Dec 2016 07:04:25 +0200
From:   Kalle Valo <kvalo@...eaurora.org>
To:     David Howells <dhowells@...hat.com>
Cc:     linux-kernel@...r.kernel.org, gnomes@...rguk.ukuu.org.uk,
        minyard@....org, netdev@...r.kernel.org,
        linux-wireless@...r.kernel.org,
        linux-security-module@...r.kernel.org, keyrings@...r.kernel.org
Subject: Re: [PATCH 23/39] Annotate hardware config module parameters in drivers/net/wireless/

David Howells <dhowells@...hat.com> writes:

> When the kernel is running in secure boot mode, we lock down the kernel to
> prevent userspace from modifying the running kernel image.  Whilst this
> includes prohibiting access to things like /dev/mem, it must also prevent
> access by means of configuring driver modules in such a way as to cause a
> device to access or modify the kernel image.
>
> To this end, annotate module_param* statements that refer to hardware
> configuration and indicate for future reference what type of parameter they
> specify.  The parameter parser in the core sees this information and can
> skip such parameters with an error message if the kernel is locked down.
> The module initialisation then runs as normal, but just sees whatever the
> default values for those parameters is.
>
> Note that we do still need to do the module initialisation because some
> drivers have viable defaults set in case parameters aren't specified and
> some drivers support automatic configuration (e.g. PNP or PCI) in addition
> to manually coded parameters.
>
> This patch annotates drivers in drivers/net/wireless/.
>
> Suggested-by: One Thousand Gnomes <gnomes@...rguk.ukuu.org.uk>
> Signed-off-by: David Howells <dhowells@...hat.com>
> cc: Kalle Valo <kvalo@...eaurora.org>
> cc: linux-wireless@...r.kernel.org
> cc: netdev@...r.kernel.org
> ---
>
>  drivers/net/wireless/cisco/airo.c |    4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)

Via which tree are you planning to submit this, should I take it to
wireless-drivers or will someone else handle it? I didn't get the cover
letter so I have no idea.

-- 
Kalle Valo