From 648cd48c9e566f53c5df30d79857e0937ae13b09 Mon Sep 17 00:00:00 2001
From: Guenter Roeck <linux@roeck-us.net>
Date: Fri, 28 Feb 2014 10:37:55 -0800
Subject: 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>
---
 drivers/hwmon/hwmon.c | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'drivers/hwmon')

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);
-- 
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