6.12-stable review patch. If anyone has any objections, please let me know.
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From: Alexei Safin a.safin@rosa.ru
[ Upstream commit 25be318324563c63cbd9cb53186203a08d2f83a1 ]
Prevent a potential invalid memory access when the requested sensor is not found.
find_ec_sensor_index() may return a negative value (e.g. -ENOENT), but its result was used without checking, which could lead to undefined behavior when passed to get_sensor_info().
Add a proper check to return -EINVAL if sensor_index is negative.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Fixes: d0ddfd241e57 ("hwmon: (asus-ec-sensors) add driver for ASUS EC") Signed-off-by: Alexei Safin a.safin@rosa.ru Link: https://lore.kernel.org/r/20250424202654.5902-1-a.safin@rosa.ru [groeck: Return error code returned from find_ec_sensor_index] Signed-off-by: Guenter Roeck linux@roeck-us.net Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/hwmon/asus-ec-sensors.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/hwmon/asus-ec-sensors.c b/drivers/hwmon/asus-ec-sensors.c index 9555366aeaf0d..fdc157c7394d9 100644 --- a/drivers/hwmon/asus-ec-sensors.c +++ b/drivers/hwmon/asus-ec-sensors.c @@ -910,6 +910,10 @@ static int asus_ec_hwmon_read_string(struct device *dev, { struct ec_sensors_data *state = dev_get_drvdata(dev); int sensor_index = find_ec_sensor_index(state, type, channel); + + if (sensor_index < 0) + return sensor_index; + *str = get_sensor_info(state, sensor_index)->label;
return 0;