From: Axel Lin <axel.lin@ingics.com>
Date: Tue, 5 Aug 2014 01:59:49 +0000 (+0800)
Subject: hwmon: (ads1015) Fix out-of-bounds array access
X-Git-Tag: submit/tizen_common/20140918.111125~216
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=cfaf021518b15f5afc412e746785d3d8cca3e143;p=profile%2Fivi%2Fkernel-x86-ivi.git

hwmon: (ads1015) Fix out-of-bounds array access

commit e981429557cbe10c780fab1c1a237cb832757652 upstream.

Current code uses data_rate as array index in ads1015_read_adc() and uses pga
as array index in ads1015_reg_to_mv, so we must make sure both data_rate and
pga settings are in valid value range.
Return -EINVAL if the setting is out-of-range.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/hwmon/ads1015.c b/drivers/hwmon/ads1015.c
index 22e0c92..1265164 100644
--- a/drivers/hwmon/ads1015.c
+++ b/drivers/hwmon/ads1015.c
@@ -212,6 +212,7 @@ static int ads1015_get_channels_config_of(struct i2c_client *client)
 				dev_err(&client->dev,
 					"invalid gain on %s\n",
 					node->full_name);
+				return -EINVAL;
 			}
 		}
 
@@ -222,6 +223,7 @@ static int ads1015_get_channels_config_of(struct i2c_client *client)
 				dev_err(&client->dev,
 					"invalid data_rate on %s\n",
 					node->full_name);
+				return -EINVAL;
 			}
 		}