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Annotate hardware config module parameters in drivers/net/ethernet/ 

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/ethernet/.

Suggested-by: Alan Cox <gnomes@lxorguk.ukuu.org.uk>
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Steffen Klassert <steffen.klassert@secunet.com>
cc: Jaroslav Kysela <perex@perex.cz>
cc: netdev@vger.kernel.org
cc: linux-parisc@vger.kernel.org
This commit is contained in:
David Howells 2017-04-04 16:54:26 +01:00
parent e43f2c52a0
commit df29840815
12 changed files with 26 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/net/ethernet/3com/3c509.c
View File

@ -1371,7 +1371,7 @@ el3_resume(struct device *pdev)
#endif /* CONFIG_PM */
module_param(debug,int, 0);
module_param_array(irq, int, NULL, 0);
module_param_hw_array(irq, int, irq, NULL, 0);
module_param(max_interrupt_work, int, 0);
MODULE_PARM_DESC(debug, "debug level (0-6)");
MODULE_PARM_DESC(irq, "IRQ number(s) (assigned)");

4
drivers/net/ethernet/3com/3c59x.c
View File

@ -813,8 +813,8 @@ module_param(global_enable_wol, int, 0);
module_param_array(enable_wol, int, NULL, 0);
module_param(rx_copybreak, int, 0);
module_param(max_interrupt_work, int, 0);
module_param(compaq_ioaddr, int, 0);
module_param(compaq_irq, int, 0);
module_param_hw(compaq_ioaddr, int, ioport, 0);
module_param_hw(compaq_irq, int, irq, 0);
module_param(compaq_device_id, int, 0);
module_param(watchdog, int, 0);
module_param(global_use_mmio, int, 0);

4
drivers/net/ethernet/8390/ne.c
View File

@ -74,8 +74,8 @@ static int bad[MAX_NE_CARDS];
static u32 ne_msg_enable;
#ifdef MODULE
module_param_array(io, int, NULL, 0);
module_param_array(irq, int, NULL, 0);
module_param_hw_array(io, int, ioport, NULL, 0);
module_param_hw_array(irq, int, irq, NULL, 0);
module_param_array(bad, int, NULL, 0);
module_param_named(msg_enable, ne_msg_enable, uint, (S_IRUSR|S_IRGRP|S_IROTH));
MODULE_PARM_DESC(io, "I/O base address(es),required");

4
drivers/net/ethernet/8390/smc-ultra.c
View File

@ -561,8 +561,8 @@ static struct net_device *dev_ultra[MAX_ULTRA_CARDS];
static int io[MAX_ULTRA_CARDS];
static int irq[MAX_ULTRA_CARDS];
module_param_array(io, int, NULL, 0);
module_param_array(irq, int, NULL, 0);
module_param_hw_array(io, int, ioport, NULL, 0);
module_param_hw_array(irq, int, irq, NULL, 0);
module_param_named(msg_enable, ultra_msg_enable, uint, (S_IRUSR|S_IRGRP|S_IROTH));
MODULE_PARM_DESC(io, "I/O base address(es)");
MODULE_PARM_DESC(irq, "IRQ number(s) (assigned)");

8
drivers/net/ethernet/8390/wd.c
View File

@ -503,10 +503,10 @@ static int irq[MAX_WD_CARDS];
static int mem[MAX_WD_CARDS];
static int mem_end[MAX_WD_CARDS]; /* for non std. mem size */
module_param_array(io, int, NULL, 0);
module_param_array(irq, int, NULL, 0);
module_param_array(mem, int, NULL, 0);
module_param_array(mem_end, int, NULL, 0);
module_param_hw_array(io, int, ioport, NULL, 0);
module_param_hw_array(irq, int, irq, NULL, 0);
module_param_hw_array(mem, int, iomem, NULL, 0);
module_param_hw_array(mem_end, int, iomem, NULL, 0);
module_param_named(msg_enable, wd_msg_enable, uint, (S_IRUSR|S_IRGRP|S_IROTH));
MODULE_PARM_DESC(io, "I/O base address(es)");
MODULE_PARM_DESC(irq, "IRQ number(s) (ignored for PureData boards)");

6
drivers/net/ethernet/amd/lance.c
View File

@ -318,9 +318,9 @@ static int io[MAX_CARDS];
static int dma[MAX_CARDS];
static int irq[MAX_CARDS];
module_param_array(io, int, NULL, 0);
module_param_array(dma, int, NULL, 0);
module_param_array(irq, int, NULL, 0);
module_param_hw_array(io, int, ioport, NULL, 0);
module_param_hw_array(dma, int, dma, NULL, 0);
module_param_hw_array(irq, int, irq, NULL, 0);
module_param(lance_debug, int, 0);
MODULE_PARM_DESC(io, "LANCE/PCnet I/O base address(es),required");
MODULE_PARM_DESC(dma, "LANCE/PCnet ISA DMA channel (ignored for some devices)");

6
drivers/net/ethernet/amd/ni65.c
View File

@ -1227,9 +1227,9 @@ static void set_multicast_list(struct net_device *dev)
#ifdef MODULE
static struct net_device *dev_ni65;
module_param(irq, int, 0);
module_param(io, int, 0);
module_param(dma, int, 0);
module_param_hw(irq, int, irq, 0);
module_param_hw(io, int, ioport, 0);
module_param_hw(dma, int, dma, 0);
MODULE_PARM_DESC(irq, "ni6510 IRQ number (ignored for some cards)");
MODULE_PARM_DESC(io, "ni6510 I/O base address");
MODULE_PARM_DESC(dma, "ni6510 ISA DMA channel (ignored for some cards)");

6
drivers/net/ethernet/cirrus/cs89x0.c
View File

@ -1704,12 +1704,12 @@ static int use_dma; /* These generate unused var warnings if ALLOW_DMA = 0 */
static int dma;
static int dmasize = 16; /* or 64 */
module_param(io, int, 0);
module_param(irq, int, 0);
module_param_hw(io, int, ioport, 0);
module_param_hw(irq, int, irq, 0);
module_param(debug, int, 0);
module_param_string(media, media, sizeof(media), 0);
module_param(duplex, int, 0);
module_param(dma , int, 0);
module_param_hw(dma , int, dma, 0);
module_param(dmasize , int, 0);
module_param(use_dma , int, 0);
MODULE_PARM_DESC(io, "cs89x0 I/O base address");

2
drivers/net/ethernet/dec/tulip/de4x5.c
View File

@ -1015,7 +1015,7 @@ static int compact_infoblock(struct net_device *dev, u_char count, u_char *p
static int io=0x0;/* EDIT THIS LINE FOR YOUR CONFIGURATION IF NEEDED */
module_param(io, int, 0);
module_param_hw(io, int, ioport, 0);
module_param(de4x5_debug, int, 0);
module_param(dec_only, int, 0);
module_param(args, charp, 0);

2
drivers/net/ethernet/hp/hp100.c
View File

@ -2966,7 +2966,7 @@ MODULE_DESCRIPTION("HP CASCADE Architecture Driver for 100VG-AnyLan Network Adap
#define HP100_DEVICES 5
/* Parameters set by insmod */
static int hp100_port[HP100_DEVICES] = { 0, [1 ... (HP100_DEVICES-1)] = -1 };
module_param_array(hp100_port, int, NULL, 0);
module_param_hw_array(hp100_port, int, ioport, NULL, 0);
/* List of devices */
static struct net_device *hp100_devlist[HP100_DEVICES];

4
drivers/net/ethernet/realtek/atp.c
View File

@ -151,8 +151,8 @@ MODULE_LICENSE("GPL");
module_param(max_interrupt_work, int, 0);
module_param(debug, int, 0);
module_param_array(io, int, NULL, 0);
module_param_array(irq, int, NULL, 0);
module_param_hw_array(io, int, ioport, NULL, 0);
module_param_hw_array(irq, int, irq, NULL, 0);
module_param_array(xcvr, int, NULL, 0);
MODULE_PARM_DESC(max_interrupt_work, "ATP maximum events handled per interrupt");
MODULE_PARM_DESC(debug, "ATP debug level (0-7)");

4
drivers/net/ethernet/smsc/smc9194.c
View File

@ -1501,8 +1501,8 @@ static void smc_set_multicast_list(struct net_device *dev)
static struct net_device *devSMC9194;
MODULE_LICENSE("GPL");
module_param(io, int, 0);
module_param(irq, int, 0);
module_param_hw(io, int, ioport, 0);
module_param_hw(irq, int, irq, 0);
module_param(ifport, int, 0);
MODULE_PARM_DESC(io, "SMC 99194 I/O base address");
MODULE_PARM_DESC(irq, "SMC 99194 IRQ number");