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Annotate hardware config module parameters in drivers/scsi/

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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/scsi/.

Suggested-by: Alan Cox <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
This commit is contained in:
David Howells 2017-04-04 16:54:27 +01:00
parent 9149ba1fc2
commit 88f06b76e4
5 changed files with 10 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/scsi/aha152x.c
View File

@ -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};

2
drivers/scsi/aha1542.c
View File

@ -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 */

8
drivers/scsi/g_NCR5380.c
View File

@ -85,8 +85,8 @@ 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);
@ -94,11 +94,11 @@ module_param(dtc_3181e, int, 0);
module_param(hp_c2502, int, 0);
static int irq[] = { -1, -1, -1, -1, -1, -1, -1, -1 };
module_param_array(irq, int, NULL, 0);
module_param_hw_array(irq, int, irq, NULL, 0);
MODULE_PARM_DESC(irq, "IRQ number(s) (0=none, 254=auto [default])");
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 };

2
drivers/scsi/gdth.c
View File

@ -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);

4
drivers/scsi/qlogicfas.c
View File

@ -137,8 +137,8 @@ err:
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");