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Annotate hardware config module parameters in sound/pci/ 

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 sound/pci/.

Suggested-by: Alan Cox <gnomes@lxorguk.ukuu.org.uk>
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Jaroslav Kysela <perex@perex.cz>
cc: Takashi Iwai <tiwai@suse.com>
cc: alsa-devel@alsa-project.org
This commit is contained in:
David Howells 2017-04-04 16:54:30 +01:00
parent 232b0b0829
commit 6192c41fc6
7 changed files with 13 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
sound/pci/als4000.c
View File

@ -102,7 +102,7 @@ MODULE_PARM_DESC(id, "ID string for ALS4000 soundcard.");
module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "Enable ALS4000 soundcard.");
#ifdef SUPPORT_JOYSTICK
module_param_array(joystick_port, int, NULL, 0444);
module_param_hw_array(joystick_port, int, ioport, NULL, 0444);
MODULE_PARM_DESC(joystick_port, "Joystick port address for ALS4000 soundcard. (0 = disabled)");
#endif

6
sound/pci/cmipci.c
View File

@ -68,14 +68,14 @@ module_param_array(id, charp, NULL, 0444);
MODULE_PARM_DESC(id, "ID string for C-Media PCI soundcard.");
module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "Enable C-Media PCI soundcard.");
module_param_array(mpu_port, long, NULL, 0444);
module_param_hw_array(mpu_port, long, ioport, NULL, 0444);
MODULE_PARM_DESC(mpu_port, "MPU-401 port.");
module_param_array(fm_port, long, NULL, 0444);
module_param_hw_array(fm_port, long, ioport, NULL, 0444);
MODULE_PARM_DESC(fm_port, "FM port.");
module_param_array(soft_ac3, bool, NULL, 0444);
MODULE_PARM_DESC(soft_ac3, "Software-conversion of raw SPDIF packets (model 033 only).");
#ifdef SUPPORT_JOYSTICK
module_param_array(joystick_port, int, NULL, 0444);
module_param_hw_array(joystick_port, int, ioport, NULL, 0444);
MODULE_PARM_DESC(joystick_port, "Joystick port address.");
#endif

2
sound/pci/ens1370.c
View File

@ -106,7 +106,7 @@ module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "Enable Ensoniq AudioPCI soundcard.");
#ifdef SUPPORT_JOYSTICK
#ifdef CHIP1371
module_param_array(joystick_port, int, NULL, 0444);
module_param_hw_array(joystick_port, int, ioport, NULL, 0444);
MODULE_PARM_DESC(joystick_port, "Joystick port address.");
#else
module_param_array(joystick, bool, NULL, 0444);

6
sound/pci/riptide/riptide.c
View File

@ -137,12 +137,12 @@ MODULE_PARM_DESC(id, "ID string for Riptide soundcard.");
module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "Enable Riptide soundcard.");
#ifdef SUPPORT_JOYSTICK
module_param_array(joystick_port, int, NULL, 0444);
module_param_hw_array(joystick_port, int, ioport, NULL, 0444);
MODULE_PARM_DESC(joystick_port, "Joystick port # for Riptide soundcard.");
#endif
module_param_array(mpu_port, int, NULL, 0444);
module_param_hw_array(mpu_port, int, ioport, NULL, 0444);
MODULE_PARM_DESC(mpu_port, "MPU401 port # for Riptide driver.");
module_param_array(opl3_port, int, NULL, 0444);
module_param_hw_array(opl3_port, int, ioport, NULL, 0444);
MODULE_PARM_DESC(opl3_port, "OPL3 port # for Riptide driver.");
/*

2
sound/pci/sonicvibes.c
View File

@ -66,7 +66,7 @@ module_param_array(reverb, bool, NULL, 0444);
MODULE_PARM_DESC(reverb, "Enable reverb (SRAM is present) for S3 SonicVibes soundcard.");
module_param_array(mge, bool, NULL, 0444);
MODULE_PARM_DESC(mge, "MIC Gain Enable for S3 SonicVibes soundcard.");
module_param(dmaio, uint, 0444);
module_param_hw(dmaio, uint, ioport, 0444);
MODULE_PARM_DESC(dmaio, "DDMA i/o base address for S3 SonicVibes soundcard.");
/*

2
sound/pci/via82xx.c
View File

@ -92,7 +92,7 @@ module_param(index, int, 0444);
MODULE_PARM_DESC(index, "Index value for VIA 82xx bridge.");
module_param(id, charp, 0444);
MODULE_PARM_DESC(id, "ID string for VIA 82xx bridge.");
module_param(mpu_port, long, 0444);
module_param_hw(mpu_port, long, ioport, 0444);
MODULE_PARM_DESC(mpu_port, "MPU-401 port. (VT82C686x only)");
#ifdef SUPPORT_JOYSTICK
module_param(joystick, bool, 0444);

6
sound/pci/ymfpci/ymfpci.c
View File

@ -55,12 +55,12 @@ module_param_array(id, charp, NULL, 0444);
MODULE_PARM_DESC(id, "ID string for the Yamaha DS-1 PCI soundcard.");
module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "Enable Yamaha DS-1 soundcard.");
module_param_array(mpu_port, long, NULL, 0444);
module_param_hw_array(mpu_port, long, ioport, NULL, 0444);
MODULE_PARM_DESC(mpu_port, "MPU-401 Port.");
module_param_array(fm_port, long, NULL, 0444);
module_param_hw_array(fm_port, long, ioport, NULL, 0444);
MODULE_PARM_DESC(fm_port, "FM OPL-3 Port.");
#ifdef SUPPORT_JOYSTICK
module_param_array(joystick_port, long, NULL, 0444);
module_param_hw_array(joystick_port, long, ioport, NULL, 0444);
MODULE_PARM_DESC(joystick_port, "Joystick port address");
#endif
module_param_array(rear_switch, bool, NULL, 0444);