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Re: [PATCH 27/39] Annotate hardware config module parameters in drivers/scsi/

From Finn Thain <fthain@telegraphics.com.au>
Newsgroups linux.kernel
Subject Re: [PATCH 27/39] Annotate hardware config module parameters in drivers/scsi/
Date 2016-12-01 23:10 +0100
Message-ID <sJHIe-2WG-41@gated-at.bofh.it> (permalink)
References <sJyEV-3Or-7@gated-at.bofh.it> <sJyOD-3S3-67@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Thu, 1 Dec 2016, 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.
> 

I can see how base addresses and IO ports are relevant, but the irq 
parameter changes below don't protect the kernel image AFAICT. What's the 
rationale for those changes? I think it should be stated here.

> 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/scsi/.
> 
> Suggested-by: One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk>
> Signed-off-by: David Howells <dhowells@redhat.com>
> cc: "Juergen E. Fischer" <fischer@norbit.de>
> cc: "James E.J. Bottomley" <jejb@linux.vnet.ibm.com>
> cc: "Martin K. Petersen" <martin.petersen@oracle.com>
> cc: Dario Ballabio <ballabio_dario@emc.com>
> cc: Finn Thain <fthain@telegraphics.com.au>
> cc: Michael Schmitz <schmitzmic@gmail.com>
> cc: Achim Leubner <achim_leubner@adaptec.com>
> cc: linux-scsi@vger.kernel.org
> ---
> 
>  drivers/scsi/aha152x.c   |    4 ++--
>  drivers/scsi/aha1542.c   |    2 +-
>  drivers/scsi/g_NCR5380.c |    8 ++++----
>  drivers/scsi/gdth.c      |    2 +-
>  drivers/scsi/qlogicfas.c |    4 ++--
>  5 files changed, 10 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/scsi/aha152x.c b/drivers/scsi/aha152x.c
> index f44d0487236e..ce5dc73d85bb 100644
> --- a/drivers/scsi/aha152x.c
> +++ b/drivers/scsi/aha152x.c
> @@ -331,11 +331,11 @@ MODULE_LICENSE("GPL");
>  #if !defined(PCMCIA)
>  #if defined(MODULE)
>  static int io[] = {0, 0};
> -module_param_array(io, int, NULL, 0);
> +module_param_hw_array(io, int, ioport, NULL, 0);
>  MODULE_PARM_DESC(io,"base io address of controller");
>  
>  static int irq[] = {0, 0};
> -module_param_array(irq, int, NULL, 0);
> +module_param_hw_array(irq, int, irq, NULL, 0);
>  MODULE_PARM_DESC(irq,"interrupt for controller");
>  
>  static int scsiid[] = {7, 7};
> diff --git a/drivers/scsi/aha1542.c b/drivers/scsi/aha1542.c
> index 7db448ec8beb..a23cc9ac5acd 100644
> --- a/drivers/scsi/aha1542.c
> +++ b/drivers/scsi/aha1542.c
> @@ -31,7 +31,7 @@ module_param(isapnp, bool, 0);
>  MODULE_PARM_DESC(isapnp, "enable PnP support (default=1)");
>  
>  static int io[MAXBOARDS] = { 0x330, 0x334, 0, 0 };
> -module_param_array(io, int, NULL, 0);
> +module_param_hw_array(io, int, ioport, NULL, 0);
>  MODULE_PARM_DESC(io, "base IO address of controller (0x130,0x134,0x230,0x234,0x330,0x334, default=0x330,0x334)");
>  
>  /* time AHA spends on the AT-bus during data transfer */
> diff --git a/drivers/scsi/g_NCR5380.c b/drivers/scsi/g_NCR5380.c
> index cbf010324c18..cf4fa7a2e738 100644
> --- a/drivers/scsi/g_NCR5380.c
> +++ b/drivers/scsi/g_NCR5380.c
> @@ -44,8 +44,8 @@ static int ncr_53c400;
>  static int ncr_53c400a;
>  static int dtc_3181e;
>  static int hp_c2502;
> -module_param(ncr_irq, int, 0);
> -module_param(ncr_addr, int, 0);
> +module_param_hw(ncr_irq, int, irq, 0);
> +module_param_hw(ncr_addr, int, ioport, 0);
>  module_param(ncr_5380, int, 0);
>  module_param(ncr_53c400, int, 0);
>  module_param(ncr_53c400a, int, 0);
> @@ -53,11 +53,11 @@ module_param(dtc_3181e, int, 0);
>  module_param(hp_c2502, int, 0);
>  
>  static int irq[] = { 0, 0, 0, 0, 0, 0, 0, 0 };
> -module_param_array(irq, int, NULL, 0);
> +module_param_hw_array(irq, int, irq, NULL, 0);
>  MODULE_PARM_DESC(irq, "IRQ number(s)");
>  
>  static int base[] = { 0, 0, 0, 0, 0, 0, 0, 0 };
> -module_param_array(base, int, NULL, 0);
> +module_param_hw_array(base, int, ioport, NULL, 0);
>  MODULE_PARM_DESC(base, "base address(es)");
>  
>  static int card[] = { -1, -1, -1, -1, -1, -1, -1, -1 };
> diff --git a/drivers/scsi/gdth.c b/drivers/scsi/gdth.c
> index 0a767740bf02..4ec08fb2dfa8 100644
> --- a/drivers/scsi/gdth.c
> +++ b/drivers/scsi/gdth.c
> @@ -353,7 +353,7 @@ static int probe_eisa_isa = 0;
>  static int force_dma32 = 0;
>  
>  /* parameters for modprobe/insmod */
> -module_param_array(irq, int, NULL, 0);
> +module_param_hw_array(irq, int, irq, NULL, 0);
>  module_param(disable, int, 0);
>  module_param(reserve_mode, int, 0);
>  module_param_array(reserve_list, int, NULL, 0);
> diff --git a/drivers/scsi/qlogicfas.c b/drivers/scsi/qlogicfas.c
> index 61cac87fb86f..840823b99e51 100644
> --- a/drivers/scsi/qlogicfas.c
> +++ b/drivers/scsi/qlogicfas.c
> @@ -137,8 +137,8 @@ static struct Scsi_Host *__qlogicfas_detect(struct scsi_host_template *host,
>  static struct qlogicfas408_priv *cards;
>  static int iobase[MAX_QLOGICFAS];
>  static int irq[MAX_QLOGICFAS] = { [0 ... MAX_QLOGICFAS-1] = -1 };
> -module_param_array(iobase, int, NULL, 0);
> -module_param_array(irq, int, NULL, 0);
> +module_param_hw_array(iobase, int, ioport, NULL, 0);
> +module_param_hw_array(irq, int, irq, NULL, 0);
>  MODULE_PARM_DESC(iobase, "I/O address");
>  MODULE_PARM_DESC(irq, "IRQ");
>  
> 
> --
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> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> 

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[PATCH 00/39] Annotate hw config module params for future lockdown David Howells <dhowells@redhat.com> - 2016-12-01 13:30 +0100
  [PATCH 01/39] Annotate module params that specify hardware  parameters (eg. ioport) David Howells <dhowells@redhat.com> - 2016-12-01 13:30 +0100
    Re: [PATCH 01/39] Annotate module params that specify hardware  parameters (eg. ioport) Greg KH <gregkh@linuxfoundation.org> - 2016-12-01 16:10 +0100
      Re: [PATCH 01/39] Annotate module params that specify hardware parameters (eg. ioport) David Howells <dhowells@redhat.com> - 2016-12-01 17:10 +0100
        Re: [PATCH 01/39] Annotate module params that specify hardware  parameters (eg. ioport) One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk> - 2016-12-05 22:20 +0100
          Re: [PATCH 01/39] Annotate module params that specify hardware  parameters (eg. ioport) Greg KH <gregkh@linuxfoundation.org> - 2016-12-06 08:20 +0100
            Re: [PATCH 01/39] Annotate module params that specify hardware parameters (eg. ioport) David Howells <dhowells@redhat.com> - 2016-12-06 11:50 +0100
              Re: [PATCH 01/39] Annotate module params that specify hardware  parameters (eg. ioport) Greg KH <gregkh@linuxfoundation.org> - 2016-12-06 12:00 +0100
      Re: [PATCH 01/39] Annotate module params that specify hardware  parameters (eg. ioport) Matthew Garrett <mjg59@srcf.ucam.org> - 2016-12-02 04:50 +0100
        Re: [PATCH 01/39] Annotate module params that specify hardware  parameters (eg. ioport) Greg KH <gregkh@linuxfoundation.org> - 2016-12-02 08:00 +0100
          Re: [PATCH 01/39] Annotate module params that specify hardware  parameters (eg. ioport) Matthew Garrett <mjg59@srcf.ucam.org> - 2016-12-02 08:20 +0100
            Re: [PATCH 01/39] Annotate module params that specify hardware  parameters (eg. ioport) One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk> - 2016-12-05 22:30 +0100
          Re: [PATCH 01/39] Annotate module params that specify hardware parameters (eg. ioport) David Howells <dhowells@redhat.com> - 2016-12-02 16:00 +0100
            Re: [PATCH 01/39] Annotate module params that specify hardware  parameters (eg. ioport) Greg KH <gregkh@linuxfoundation.org> - 2016-12-05 16:50 +0100
              Re: [PATCH 01/39] Annotate module params that specify hardware parameters (eg. ioport) David Howells <dhowells@redhat.com> - 2016-12-06 12:00 +0100
  [PATCH 20/39] Annotate hardware config module parameters in  drivers/net/hamradio/ David Howells <dhowells@redhat.com> - 2016-12-01 13:40 +0100
  [PATCH 34/39] Annotate hardware config module parameters in  drivers/watchdog/ David Howells <dhowells@redhat.com> - 2016-12-01 13:40 +0100
    Re: [PATCH 34/39] Annotate hardware config module parameters in  drivers/watchdog/ Guenter Roeck <linux@roeck-us.net> - 2016-12-01 14:00 +0100
  [PATCH 03/39] Annotate hardware config module parameters in  drivers/char/ipmi/ David Howells <dhowells@redhat.com> - 2016-12-01 13:40 +0100
    Re: [PATCH 03/39] Annotate hardware config module parameters in  drivers/char/ipmi/ Corey Minyard <minyard@acm.org> - 2016-12-01 14:20 +0100
  [PATCH 05/39] Annotate hardware config module parameters in  drivers/char/ David Howells <dhowells@redhat.com> - 2016-12-01 13:40 +0100
  [PATCH 28/39] Annotate hardware config module parameters in  drivers/staging/i4l/ David Howells <dhowells@redhat.com> - 2016-12-01 13:40 +0100
  [PATCH 07/39] Annotate hardware config module parameters in  drivers/cpufreq/ David Howells <dhowells@redhat.com> - 2016-12-01 13:40 +0100
    Re: [PATCH 07/39] Annotate hardware config module parameters in drivers/cpufreq/ "Rafael J. Wysocki" <rafael@kernel.org> - 2016-12-01 15:10 +0100
      Re: [PATCH 07/39] Annotate hardware config module parameters in drivers/cpufreq/ David Howells <dhowells@redhat.com> - 2016-12-01 15:20 +0100
        Re: [PATCH 07/39] Annotate hardware config module parameters in drivers/cpufreq/ "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-12-01 15:30 +0100
  [PATCH 39/39] Annotate hardware config module parameters in  sound/pci/ David Howells <dhowells@redhat.com> - 2016-12-01 13:40 +0100
  [PATCH 35/39] Annotate hardware config module parameters in  fs/pstore/ David Howells <dhowells@redhat.com> - 2016-12-01 13:40 +0100
  [PATCH 11/39] Annotate hardware config module parameters in  drivers/input/ David Howells <dhowells@redhat.com> - 2016-12-01 13:40 +0100
    Re: [PATCH 11/39] Annotate hardware config module parameters in  drivers/input/ Dmitry Torokhov <dmitry.torokhov@gmail.com> - 2016-12-03 20:00 +0100
  [PATCH 21/39] Annotate hardware config module parameters in  drivers/net/irda/ David Howells <dhowells@redhat.com> - 2016-12-01 13:40 +0100
  [PATCH 31/39] Annotate hardware config module parameters in  drivers/staging/vme/ David Howells <dhowells@redhat.com> - 2016-12-01 13:40 +0100
  [PATCH 33/39] Annotate hardware config module parameters in  drivers/video/ David Howells <dhowells@redhat.com> - 2016-12-01 13:40 +0100
  [PATCH 04/39] Annotate hardware config module parameters in  drivers/char/mwave/ David Howells <dhowells@redhat.com> - 2016-12-01 13:40 +0100
  [PATCH 38/39] Annotate hardware config module parameters in  sound/oss/ David Howells <dhowells@redhat.com> - 2016-12-01 13:40 +0100
  [PATCH 06/39] Annotate hardware config module parameters in  drivers/clocksource/ David Howells <dhowells@redhat.com> - 2016-12-01 13:40 +0100
  [PATCH 12/39] Annotate hardware config module parameters in  drivers/isdn/ David Howells <dhowells@redhat.com> - 2016-12-01 13:40 +0100
  [PATCH 23/39] Annotate hardware config module parameters in  drivers/net/wireless/ David Howells <dhowells@redhat.com> - 2016-12-01 13:40 +0100
    Re: [PATCH 23/39] Annotate hardware config module parameters in drivers/net/wireless/ Kalle Valo <kvalo@codeaurora.org> - 2016-12-02 06:10 +0100
      Re: [PATCH 23/39] Annotate hardware config module parameters in drivers/net/wireless/ David Howells <dhowells@redhat.com> - 2016-12-07 14:50 +0100
  [PATCH 29/39] Annotate hardware config module parameters in  drivers/staging/media/ David Howells <dhowells@redhat.com> - 2016-12-01 13:40 +0100
    Re: [PATCH 29/39] Annotate hardware config module parameters in  drivers/staging/media/ Mauro Carvalho Chehab <mchehab@s-opensource.com> - 2016-12-01 16:00 +0100
      Re: [PATCH 29/39] Annotate hardware config module parameters in drivers/staging/media/ David Howells <dhowells@redhat.com> - 2016-12-01 16:10 +0100
        Re: [PATCH 29/39] Annotate hardware config module parameters in  drivers/staging/media/ Mauro Carvalho Chehab <mchehab@s-opensource.com> - 2016-12-01 16:20 +0100
  [PATCH 09/39] Annotate hardware config module parameters in  drivers/i2c/ David Howells <dhowells@redhat.com> - 2016-12-01 13:40 +0100
    Re: [PATCH 09/39] Annotate hardware config module parameters in  drivers/i2c/ Jean Delvare <jdelvare@suse.de> - 2016-12-01 14:50 +0100
      Re: [PATCH 09/39] Annotate hardware config module parameters in drivers/i2c/ David Howells <dhowells@redhat.com> - 2016-12-01 15:20 +0100
        Re: [PATCH 09/39] Annotate hardware config module parameters in  drivers/i2c/ Jean Delvare <jdelvare@suse.de> - 2016-12-01 17:10 +0100
        Re: [PATCH 09/39] Annotate hardware config module parameters in  drivers/i2c/ One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk> - 2016-12-05 22:20 +0100
  [PATCH 19/39] Annotate hardware config module parameters in  drivers/net/ethernet/ David Howells <dhowells@redhat.com> - 2016-12-01 13:40 +0100
  [PATCH 18/39] Annotate hardware config module parameters in  drivers/net/can/ David Howells <dhowells@redhat.com> - 2016-12-01 13:40 +0100
    Re: [PATCH 18/39] Annotate hardware config module parameters in  drivers/net/can/ Marc Kleine-Budde <mkl@pengutronix.de> - 2016-12-01 14:10 +0100
  [PATCH 25/39] Annotate hardware config module parameters in  drivers/pci/hotplug/ David Howells <dhowells@redhat.com> - 2016-12-01 13:40 +0100
    Re: [PATCH 25/39] Annotate hardware config module parameters in  drivers/pci/hotplug/ Bjorn Helgaas <helgaas@kernel.org> - 2016-12-07 19:40 +0100
  [PATCH 27/39] Annotate hardware config module parameters in  drivers/scsi/ David Howells <dhowells@redhat.com> - 2016-12-01 13:40 +0100
    Re: [PATCH 27/39] Annotate hardware config module parameters in  drivers/scsi/ Finn Thain <fthain@telegraphics.com.au> - 2016-12-01 23:10 +0100
  [PATCH 26/39] Annotate hardware config module parameters in  drivers/pcmcia/ David Howells <dhowells@redhat.com> - 2016-12-01 13:40 +0100
  [PATCH 08/39] Annotate hardware config module parameters in  drivers/gpio/ David Howells <dhowells@redhat.com> - 2016-12-01 13:40 +0100
    Re: [PATCH 08/39] Annotate hardware config module parameters in  drivers/gpio/ William Breathitt Gray <vilhelm.gray@gmail.com> - 2016-12-01 14:50 +0100
    Re: [PATCH 08/39] Annotate hardware config module parameters in drivers/gpio/ Linus Walleij <linus.walleij@linaro.org> - 2016-12-02 14:00 +0100
  [PATCH 32/39] Annotate hardware config module parameters in  drivers/tty/ David Howells <dhowells@redhat.com> - 2016-12-01 13:40 +0100
    Re: [PATCH 32/39] Annotate hardware config module parameters in  drivers/tty/ Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-12-01 16:10 +0100
  [PATCH 13/39] Annotate hardware config module parameters in  drivers/media/ David Howells <dhowells@redhat.com> - 2016-12-01 13:40 +0100
  [PATCH 36/39] Annotate hardware config module parameters in  sound/drivers/ David Howells <dhowells@redhat.com> - 2016-12-01 13:40 +0100
  [PATCH 17/39] Annotate hardware config module parameters in  drivers/net/arcnet/ David Howells <dhowells@redhat.com> - 2016-12-01 13:40 +0100
  [PATCH 24/39] Annotate hardware config module parameters in  drivers/parport/ David Howells <dhowells@redhat.com> - 2016-12-01 13:40 +0100
  [PATCH 15/39] Annotate hardware config module parameters in  drivers/mmc/host/ David Howells <dhowells@redhat.com> - 2016-12-01 13:40 +0100
  [PATCH 02/39] Annotate hardware config module parameters in  arch/x86/mm/ David Howells <dhowells@redhat.com> - 2016-12-01 13:40 +0100
  [PATCH 16/39] Annotate hardware config module parameters in  drivers/net/appletalk/ David Howells <dhowells@redhat.com> - 2016-12-01 13:40 +0100
  [PATCH 37/39] Annotate hardware config module parameters in  sound/isa/ David Howells <dhowells@redhat.com> - 2016-12-01 13:40 +0100
  [PATCH 30/39] Annotate hardware config module parameters in  drivers/staging/speakup/ David Howells <dhowells@redhat.com> - 2016-12-01 13:40 +0100
  [PATCH 22/39] Annotate hardware config module parameters in  drivers/net/wan/ David Howells <dhowells@redhat.com> - 2016-12-01 13:40 +0100
  [PATCH 10/39] Annotate hardware config module parameters in  drivers/iio/ David Howells <dhowells@redhat.com> - 2016-12-01 13:40 +0100
    Re: [PATCH 10/39] Annotate hardware config module parameters in  drivers/iio/ William Breathitt Gray <vilhelm.gray@gmail.com> - 2016-12-01 15:00 +0100
      Re: [PATCH 10/39] Annotate hardware config module parameters in  drivers/iio/ Jonathan Cameron <jic23@kernel.org> - 2016-12-03 15:40 +0100
        Re: [PATCH 10/39] Annotate hardware config module parameters in drivers/iio/ David Howells <dhowells@redhat.com> - 2016-12-07 14:50 +0100
  [PATCH 14/39] Annotate hardware config module parameters in  drivers/misc/ David Howells <dhowells@redhat.com> - 2016-12-01 13:40 +0100

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