linux-kernel - [PATCH 3.10 065/250] hwmon: (ds620) Fix overflows seen when writing temperature limits

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1496876436-32402-66-git-send-email-w@1wt.eu>
Date:   Thu,  8 Jun 2017 00:57:31 +0200
From:   Willy Tarreau <w@....eu>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        linux@...ck-us.net
Cc:     Willy Tarreau <w@....eu>
Subject: [PATCH 3.10 065/250] hwmon: (ds620) Fix overflows seen when writing temperature limits

From: Guenter Roeck <linux@...ck-us.net>

commit e36ce99ee0815d7919a7b589bfb66f3de50b6bc7 upstream.

Module test reports:

temp1_max: Suspected overflow: [160000 vs. 0]
temp1_min: Suspected overflow: [160000 vs. 0]

This is seen because the values passed when writing temperature limits
are unbound.

Reviewed-by: Jean Delvare <jdelvare@...e.de>
Fixes: 6099469805c2 ("hwmon: Support for Dallas Semiconductor DS620")
Signed-off-by: Guenter Roeck <linux@...ck-us.net>
Signed-off-by: Willy Tarreau <w@....eu>
---
 drivers/hwmon/ds620.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hwmon/ds620.c b/drivers/hwmon/ds620.c
index f1d6b42..c25700f 100644
--- a/drivers/hwmon/ds620.c
+++ b/drivers/hwmon/ds620.c
@@ -166,7 +166,7 @@ static ssize_t set_temp(struct device *dev, struct device_attribute *da,
 	if (res)
 		return res;
 
-	val = (val * 10 / 625) * 8;
+	val = (clamp_val(val, -128000, 128000) * 10 / 625) * 8;
 
 	mutex_lock(&data->update_lock);
 	data->temp[attr->index] = val;
-- 
2.8.0.rc2.1.gbe9624a