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EDAC: Boundary-check edac_debug_level 

Only levels [0:4] are allowed so enforce that. Also, while at it,
massage Kconfig text and add valid debug levels range to the module
parameter description.

Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
This commit is contained in:
Borislav Petkov 2012-09-10 16:50:54 +02:00 committed by Borislav Petkov
parent 876bb331e2
commit 37929874d4
2 changed files with 24 additions and 11 deletions
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8
drivers/edac/Kconfig
View File

@ -42,10 +42,10 @@ config EDAC_LEGACY_SYSFS
config EDAC_DEBUG
bool "Debugging"
help
This turns on debugging information for the entire EDAC
sub-system. You can insert module with "debug_level=x", current
there're four debug levels (x=0,1,2,3 from low to high).
Usually you should select 'N'.
This turns on debugging information for the entire EDAC subsystem.
You do so by inserting edac_module with "edac_debug_level=x." Valid
levels are 0-4 (from low to high) and by default it is set to 2.
Usually you should select 'N' here.
config EDAC_DECODE_MCE
tristate "Decode MCEs in human-readable form (only on AMD for now)"

27
drivers/edac/edac_module.c
View File

@ -18,9 +18,29 @@
#define EDAC_VERSION "Ver: 3.0.0"
#ifdef CONFIG_EDAC_DEBUG
static int edac_set_debug_level(const char *buf, struct kernel_param *kp)
{
unsigned long val;
int ret;
ret = kstrtoul(buf, 0, &val);
if (ret)
return ret;
if (val < 0 || val > 4)
return -EINVAL;
return param_set_int(buf, kp);
}
/* Values of 0 to 4 will generate output */
int edac_debug_level = 2;
EXPORT_SYMBOL_GPL(edac_debug_level);
module_param_call(edac_debug_level, edac_set_debug_level, param_get_int,
&edac_debug_level, 0644);
MODULE_PARM_DESC(edac_debug_level, "EDAC debug level: [0-4], default: 2");
#endif
/* scope is to module level only */
@ -132,10 +152,3 @@ module_exit(edac_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Doug Thompson www.softwarebitmaker.com, et al");
MODULE_DESCRIPTION("Core library routines for EDAC reporting");
/* refer to *_sysfs.c files for parameters that are exported via sysfs */
#ifdef CONFIG_EDAC_DEBUG
module_param(edac_debug_level, int, 0644);
MODULE_PARM_DESC(edac_debug_level, "Debug level");
#endif