[PATCH AUTOSEL 6.6 3/3] hwmon: (nct6775-core) Fix out of bounds access for NCT679{8,9}

From: Sasha Levin
Date: Tue Mar 25 2025 - 14:47:07 EST


From: Tasos Sahanidis <tasos@xxxxxxxxxxxx>

[ 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@xxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20250312030832.106475-1-tasos@xxxxxxxxxxxx
Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/hwmon/nct6775-core.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/hwmon/nct6775-core.c b/drivers/hwmon/nct6775-core.c
index 16f6b7ba2a5de..da4c3425d2d1d 100644
--- a/drivers/hwmon/nct6775-core.c
+++ b/drivers/hwmon/nct6775-core.c
@@ -273,8 +273,8 @@ static const s8 NCT6776_BEEP_BITS[NUM_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