linux-kernel - [PATCH 3.10 22/55] hwmon: (ads1015) Fix out-of-bounds array access

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Message-Id: <20140903220457.491363002@linuxfoundation.org>
Date:	Wed,  3 Sep 2014 15:05:12 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Axel Lin <axel.lin@...ics.com>,
	Guenter Roeck <linux@...ck-us.net>
Subject: [PATCH 3.10 22/55] hwmon: (ads1015) Fix out-of-bounds array access

3.10-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Axel Lin <axel.lin@...ics.com>

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@...ics.com>
Signed-off-by: Guenter Roeck <linux@...ck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/hwmon/ads1015.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/hwmon/ads1015.c
+++ b/drivers/hwmon/ads1015.c
@@ -198,6 +198,7 @@ static int ads1015_get_channels_config_o
 				dev_err(&client->dev,
 					"invalid gain on %s\n",
 					node->full_name);
+				return -EINVAL;
 			}
 		}
 
@@ -208,6 +209,7 @@ static int ads1015_get_channels_config_o
 				dev_err(&client->dev,
 					"invalid data_rate on %s\n",
 					node->full_name);
+				return -EINVAL;
 			}
 		}
 


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