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authorAxel Lin <axel.lin@ingics.com>2014-08-06 04:24:00 +0400
committerGuenter Roeck <linux@roeck-us.net>2014-08-06 06:44:42 +0400
commitfa642d9d6e502fbdbd1122a6a247c8ad17063a29 (patch)
treebd56997463057d2127fdd6777d70ecf65e668c38
parentdb59ac434230c2d6c051bb314f320ad977e6841d (diff)
downloadlinux-fa642d9d6e502fbdbd1122a6a247c8ad17063a29.tar.xz
hwmon: (lm87) Fix vrm write operation
vrm is an u8, so the written value needs to be limited to [0, 255]. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
-rw-r--r--drivers/hwmon/lm87.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/hwmon/lm87.c b/drivers/hwmon/lm87.c
index ba1d83d48056..a5e295826aea 100644
--- a/drivers/hwmon/lm87.c
+++ b/drivers/hwmon/lm87.c
@@ -617,6 +617,10 @@ static ssize_t set_vrm(struct device *dev, struct device_attribute *attr,
err = kstrtoul(buf, 10, &val);
if (err)
return err;
+
+ if (val > 255)
+ return -EINVAL;
+
data->vrm = val;
return count;
}