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authorGuenter Roeck <linux@roeck-us.net>2014-02-28 22:37:55 +0400
committerGuenter Roeck <linux@roeck-us.net>2014-03-03 20:01:06 +0400
commit648cd48c9e566f53c5df30d79857e0937ae13b09 (patch)
tree1fd88b546e0018249a91befa414730de0a9a553b
parent768821a302ae98c2d6a570e0ad63780180ba34db (diff)
downloadlinux-648cd48c9e566f53c5df30d79857e0937ae13b09.tar.xz
hwmon: Do not accept invalid name attributes
hwmon name attributes must not include '-', as specified in Documentation/hwmon/sysfs-interface. Also filter out spaces, tabs, wildcards, and newline characters. Tested-by: Jean Delvare <jdelvare@suse.de> Reviewed-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
-rw-r--r--drivers/hwmon/hwmon.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/hwmon/hwmon.c b/drivers/hwmon/hwmon.c
index e176a43af63d..a26c385a435b 100644
--- a/drivers/hwmon/hwmon.c
+++ b/drivers/hwmon/hwmon.c
@@ -22,6 +22,7 @@
#include <linux/gfp.h>
#include <linux/spinlock.h>
#include <linux/pci.h>
+#include <linux/string.h>
#define HWMON_ID_PREFIX "hwmon"
#define HWMON_ID_FORMAT HWMON_ID_PREFIX "%d"
@@ -99,6 +100,10 @@ hwmon_device_register_with_groups(struct device *dev, const char *name,
struct hwmon_device *hwdev;
int err, id;
+ /* Do not accept invalid characters in hwmon name attribute */
+ if (name && (!strlen(name) || strpbrk(name, "-* \t\n")))
+ return ERR_PTR(-EINVAL);
+
id = ida_simple_get(&hwmon_ida, 0, 0, GFP_KERNEL);
if (id < 0)
return ERR_PTR(id);