linux-kernel - [PATCH AUTOSEL 5.10 2/2] hwmon: (nct6775-core) Fix out of bounds access for NCT679{8,9}

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Message-Id: <20250325184313.2152467-2-sashal@kernel.org>
Date: Tue, 25 Mar 2025 14:43:13 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Tasos Sahanidis <tasos@...ossah.com>,
	Guenter Roeck <linux@...ck-us.net>,
	Sasha Levin <sashal@...nel.org>,
	jdelvare@...e.com,
	linux-hwmon@...r.kernel.org
Subject: [PATCH AUTOSEL 5.10 2/2] hwmon: (nct6775-core) Fix out of bounds access for NCT679{8,9}

From: Tasos Sahanidis <tasos@...ossah.com>

[ Upstream commit 815f80ad20b63830949a77c816e35395d5d55144 ]

pwm_num is set to 7 for these chips, but NCT6776_REG_PWM_MODE and
NCT6776_PWM_MODE_MASK only contain 6 values.

Fix this by adding another 0 to the end of each array.

Signed-off-by: Tasos Sahanidis <tasos@...ossah.com>
Link: https://lore.kernel.org/r/20250312030832.106475-1-tasos@tasossah.com
Signed-off-by: Guenter Roeck <linux@...ck-us.net>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/hwmon/nct6775.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/hwmon/nct6775.c b/drivers/hwmon/nct6775.c
index 3645a19cdaf4d..71cfc1c5bd12e 100644
--- a/drivers/hwmon/nct6775.c
+++ b/drivers/hwmon/nct6775.c
@@ -420,8 +420,8 @@ static const s8 NCT6776_BEEP_BITS[] = {
 static const u16 NCT6776_REG_TOLERANCE_H[] = {
 	0x10c, 0x20c, 0x30c, 0x80c, 0x90c, 0xa0c, 0xb0c };
 
-static const u8 NCT6776_REG_PWM_MODE[] = { 0x04, 0, 0, 0, 0, 0 };
-static const u8 NCT6776_PWM_MODE_MASK[] = { 0x01, 0, 0, 0, 0, 0 };
+static const u8 NCT6776_REG_PWM_MODE[] = { 0x04, 0, 0, 0, 0, 0, 0 };
+static const u8 NCT6776_PWM_MODE_MASK[] = { 0x01, 0, 0, 0, 0, 0, 0 };
 
 static const u16 NCT6776_REG_FAN_MIN[] = {
 	0x63a, 0x63c, 0x63e, 0x640, 0x642, 0x64a, 0x64c };
-- 
2.39.5