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[ Upstream commit25be318324] 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:d0ddfd241e("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>