From: William Breathitt Gray <vilhelm.gray@gmail.com>
To: David Howells <dhowells@redhat.com>
Cc: linux-kernel@vger.kernel.org, gnomes@lxorguk.ukuu.org.uk,
minyard@acm.org, linux-iio@vger.kernel.org,
linux-security-module@vger.kernel.org, keyrings@vger.kernel.org,
Jonathan Cameron <jic23@kernel.org>
Subject: Re: [PATCH 10/39] Annotate hardware config module parameters in drivers/iio/
Date: Thu, 1 Dec 2016 08:50:25 -0500 [thread overview]
Message-ID: <20161201135025.GB30135@sophia> (raw)
In-Reply-To: <148059545558.31612.1279403857733187213.stgit@warthog.procyon.org.uk>
On Thu, Dec 01, 2016 at 12:30:55PM +0000, David Howells wrote:
>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/iio/.
>
>Suggested-by: One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk>
>Signed-off-by: David Howells <dhowells@redhat.com>
>cc: William Breathitt Gray <vilhelm.gray@gmail.com>
>cc: Jonathan Cameron <jic23@kernel.org>
>cc: linux-iio@vger.kernel.org
Acked-by: William Breathitt Gray <vilhelm.gray@gmail.com>
>---
>
> drivers/iio/adc/stx104.c | 2 +-
> drivers/iio/dac/cio-dac.c | 2 +-
> 2 files changed, 2 insertions(+), 2 deletions(-)
>
>diff --git a/drivers/iio/adc/stx104.c b/drivers/iio/adc/stx104.c
>index 7e3645749eaf..a805bd543acb 100644
>--- a/drivers/iio/adc/stx104.c
>+++ b/drivers/iio/adc/stx104.c
>@@ -49,7 +49,7 @@
>
> static unsigned int base[max_num_isa_dev(STX104_EXTENT)];
> static unsigned int num_stx104;
>-module_param_array(base, uint, &num_stx104, 0);
>+module_param_hw_array(base, uint, ioport, &num_stx104, 0);
> MODULE_PARM_DESC(base, "Apex Embedded Systems STX104 base addresses");
>
> /**
>diff --git a/drivers/iio/dac/cio-dac.c b/drivers/iio/dac/cio-dac.c
>index 5a743e2a779d..dac086129edf 100644
>--- a/drivers/iio/dac/cio-dac.c
>+++ b/drivers/iio/dac/cio-dac.c
>@@ -39,7 +39,7 @@
>
> static unsigned int base[max_num_isa_dev(CIO_DAC_EXTENT)];
> static unsigned int num_cio_dac;
>-module_param_array(base, uint, &num_cio_dac, 0);
>+module_param_hw_array(base, uint, ioport, &num_cio_dac, 0);
> MODULE_PARM_DESC(base, "Measurement Computing CIO-DAC base addresses");
>
> /**
>
next prev parent reply other threads:[~2016-12-01 13:50 UTC|newest]
Thread overview: 78+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-01 12:29 [PATCH 00/39] Annotate hw config module params for future lockdown David Howells
2016-12-01 12:29 ` [PATCH 01/39] Annotate module params that specify hardware parameters (eg. ioport) David Howells
2016-12-01 15:01 ` Greg KH
2016-12-02 3:07 ` Matthew Garrett
2016-12-02 6:55 ` Greg KH
2016-12-02 7:12 ` Matthew Garrett
2016-12-05 21:26 ` One Thousand Gnomes
2016-12-02 14:59 ` David Howells
2016-12-05 15:47 ` Greg KH
2016-12-06 10:54 ` David Howells
2016-12-01 16:02 ` David Howells
2016-12-05 21:12 ` One Thousand Gnomes
2016-12-06 7:11 ` Greg KH
2016-12-06 10:42 ` David Howells
2016-12-06 10:50 ` Greg KH
2016-12-01 12:29 ` [PATCH 02/39] Annotate hardware config module parameters in arch/x86/mm/ David Howells
2016-12-01 12:30 ` [PATCH 03/39] Annotate hardware config module parameters in drivers/char/ipmi/ David Howells
2016-12-01 13:14 ` Corey Minyard
2016-12-01 12:30 ` [PATCH 04/39] Annotate hardware config module parameters in drivers/char/mwave/ David Howells
2016-12-01 12:30 ` [PATCH 05/39] Annotate hardware config module parameters in drivers/char/ David Howells
2016-12-01 12:30 ` [PATCH 06/39] Annotate hardware config module parameters in drivers/clocksource/ David Howells
2016-12-01 12:30 ` [PATCH 07/39] Annotate hardware config module parameters in drivers/cpufreq/ David Howells
2016-12-01 14:02 ` Rafael J. Wysocki
2016-12-01 14:19 ` David Howells
2016-12-01 14:21 ` Rafael J. Wysocki
2016-12-01 12:30 ` [PATCH 08/39] Annotate hardware config module parameters in drivers/gpio/ David Howells
2016-12-01 13:49 ` William Breathitt Gray
2016-12-02 12:55 ` Linus Walleij
2016-12-01 12:30 ` [PATCH 09/39] Annotate hardware config module parameters in drivers/i2c/ David Howells
2016-12-01 13:47 ` Jean Delvare
2016-12-01 14:12 ` David Howells
2016-12-01 16:06 ` Jean Delvare
2016-12-05 21:09 ` One Thousand Gnomes
2016-12-01 12:30 ` [PATCH 10/39] Annotate hardware config module parameters in drivers/iio/ David Howells
2016-12-01 13:50 ` William Breathitt Gray [this message]
2016-12-03 9:05 ` Jonathan Cameron
2016-12-07 13:43 ` David Howells
2016-12-01 12:31 ` [PATCH 11/39] Annotate hardware config module parameters in drivers/input/ David Howells
2016-12-03 18:51 ` Dmitry Torokhov
2016-12-01 12:31 ` [PATCH 12/39] Annotate hardware config module parameters in drivers/isdn/ David Howells
2016-12-01 12:31 ` [PATCH 13/39] Annotate hardware config module parameters in drivers/media/ David Howells
2016-12-01 12:31 ` [PATCH 14/39] Annotate hardware config module parameters in drivers/misc/ David Howells
2016-12-01 12:31 ` [PATCH 15/39] Annotate hardware config module parameters in drivers/mmc/host/ David Howells
2016-12-01 12:31 ` [PATCH 16/39] Annotate hardware config module parameters in drivers/net/appletalk/ David Howells
2016-12-01 12:31 ` [PATCH 17/39] Annotate hardware config module parameters in drivers/net/arcnet/ David Howells
2016-12-01 12:32 ` [PATCH 18/39] Annotate hardware config module parameters in drivers/net/can/ David Howells
2016-12-01 13:05 ` Marc Kleine-Budde
2016-12-01 12:32 ` [PATCH 19/39] Annotate hardware config module parameters in drivers/net/ethernet/ David Howells
2016-12-01 12:32 ` [PATCH 20/39] Annotate hardware config module parameters in drivers/net/hamradio/ David Howells
2016-12-01 12:32 ` [PATCH 21/39] Annotate hardware config module parameters in drivers/net/irda/ David Howells
2016-12-01 12:32 ` [PATCH 22/39] Annotate hardware config module parameters in drivers/net/wan/ David Howells
2016-12-01 12:32 ` [PATCH 23/39] Annotate hardware config module parameters in drivers/net/wireless/ David Howells
2016-12-02 5:04 ` Kalle Valo
2016-12-07 13:45 ` David Howells
2016-12-01 12:32 ` [PATCH 24/39] Annotate hardware config module parameters in drivers/parport/ David Howells
2016-12-01 12:32 ` [PATCH 25/39] Annotate hardware config module parameters in drivers/pci/hotplug/ David Howells
2016-12-07 18:34 ` Bjorn Helgaas
2016-12-01 12:33 ` [PATCH 26/39] Annotate hardware config module parameters in drivers/pcmcia/ David Howells
2016-12-01 12:33 ` [PATCH 27/39] Annotate hardware config module parameters in drivers/scsi/ David Howells
2016-12-01 22:05 ` Finn Thain
2017-04-05 14:33 ` David Howells
2016-12-01 12:33 ` [PATCH 28/39] Annotate hardware config module parameters in drivers/staging/i4l/ David Howells
2016-12-01 12:33 ` [PATCH 29/39] Annotate hardware config module parameters in drivers/staging/media/ David Howells
2016-12-01 14:54 ` Mauro Carvalho Chehab
2016-12-01 14:59 ` David Howells
2016-12-01 15:17 ` Mauro Carvalho Chehab
2016-12-01 12:33 ` [PATCH 30/39] Annotate hardware config module parameters in drivers/staging/speakup/ David Howells
2016-12-01 12:33 ` [PATCH 31/39] Annotate hardware config module parameters in drivers/staging/vme/ David Howells
2016-12-01 12:33 ` [PATCH 32/39] Annotate hardware config module parameters in drivers/tty/ David Howells
2016-12-01 15:02 ` Greg Kroah-Hartman
2016-12-01 12:34 ` [PATCH 33/39] Annotate hardware config module parameters in drivers/video/ David Howells
2016-12-01 12:34 ` [PATCH 34/39] Annotate hardware config module parameters in drivers/watchdog/ David Howells
2016-12-01 12:58 ` Guenter Roeck
2016-12-01 12:34 ` [PATCH 35/39] Annotate hardware config module parameters in fs/pstore/ David Howells
2016-12-01 12:34 ` [PATCH 36/39] Annotate hardware config module parameters in sound/drivers/ David Howells
2016-12-01 12:34 ` [PATCH 37/39] Annotate hardware config module parameters in sound/isa/ David Howells
2016-12-01 12:34 ` [PATCH 38/39] Annotate hardware config module parameters in sound/oss/ David Howells
2016-12-01 12:34 ` [PATCH 39/39] Annotate hardware config module parameters in sound/pci/ David Howells
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