linux-kernel - [PATCH 2/2] hwmon: (asus_wmi_sensors) fix an array overflow

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Message-ID: <20211130105117.GH5827@kili>
Date:   Tue, 30 Nov 2021 13:51:17 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Ed Brindley <kernel@...davale.org>
Cc:     Denis Pauk <pauk.denis@...il.com>,
        Jean Delvare <jdelvare@...e.com>,
        Guenter Roeck <linux@...ck-us.net>,
        linux-hwmon@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org
Subject: [PATCH 2/2] hwmon: (asus_wmi_sensors) fix an array overflow

Smatch detects this array overflow:

    drivers/hwmon/asus_wmi_sensors.c:569 asus_wmi_configure_sensor_setup()
    error: buffer overflow 'hwmon_attributes' 8 <= 9

The hwmon_attributes[] array should have "hwmon_max" so that it gets
larger when more attributes are added.

Fixes: 9d07e54a25b8 ("hwmon: (asus_wmi_sensors) Support X370 Asus WMI.")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
---
 drivers/hwmon/asus_wmi_sensors.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hwmon/asus_wmi_sensors.c b/drivers/hwmon/asus_wmi_sensors.c
index 67af15d99396..c80eee874b6c 100644
--- a/drivers/hwmon/asus_wmi_sensors.c
+++ b/drivers/hwmon/asus_wmi_sensors.c
@@ -125,7 +125,7 @@ static enum hwmon_sensor_types asus_data_types[] = {
 	[WATER_FLOW]	= hwmon_fan,
 };
 
-static u32 hwmon_attributes[] = {
+static u32 hwmon_attributes[hwmon_max] = {
 	[hwmon_chip]	= HWMON_C_REGISTER_TZ,
 	[hwmon_temp]	= HWMON_T_INPUT | HWMON_T_LABEL,
 	[hwmon_in]	= HWMON_I_INPUT | HWMON_I_LABEL,
-- 
2.20.1