From: Yuan Mu <Ymu@winbond.com.tw>
Date: Wed, 23 Nov 2005 23:44:21 +0000 (-0800)
Subject: [PATCH] hwmon: Fix missing boundary check when setting W83627THF in0 limits
X-Git-Tag: v2.6.15-rc4~38
X-Git-Url: http://ftp.safe.ca/?a=commitdiff_plain;h=2723ab91cb4019def10bdb01b0fecb85e6ac7884;p=safe%2Fjmp%2Flinux-2.6

[PATCH] hwmon: Fix missing boundary check when setting W83627THF in0 limits

Add SENSORS_LIMIT in store VCore limit functions. This fixes a potential
u8 overflow on out-of-range user input.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/drivers/hwmon/w83627hf.c b/drivers/hwmon/w83627hf.c
index 4e9a04e..bbb3dcd 100644
--- a/drivers/hwmon/w83627hf.c
+++ b/drivers/hwmon/w83627hf.c
@@ -456,7 +456,9 @@ static ssize_t store_regs_in_min0(struct device *dev, struct device_attribute *a
 		(w83627thf == data->type || w83637hf == data->type))
 
 		/* use VRM9 calculation */
-		data->in_min[0] = (u8)(((val * 100) - 70000 + 244) / 488);
+		data->in_min[0] =
+			SENSORS_LIMIT(((val * 100) - 70000 + 244) / 488, 0,
+					255);
 	else
 		/* use VRM8 (standard) calculation */
 		data->in_min[0] = IN_TO_REG(val);
@@ -481,7 +483,9 @@ static ssize_t store_regs_in_max0(struct device *dev, struct device_attribute *a
 		(w83627thf == data->type || w83637hf == data->type))
 		
 		/* use VRM9 calculation */
-		data->in_max[0] = (u8)(((val * 100) - 70000 + 244) / 488);
+		data->in_max[0] =
+			SENSORS_LIMIT(((val * 100) - 70000 + 244) / 488, 0,
+					255);
 	else
 		/* use VRM8 (standard) calculation */
 		data->in_max[0] = IN_TO_REG(val);