4.14-stable review patch. If anyone has any objections, please let me know.
------------------ From: Aditya Pakki <[email protected]> commit 3a10e3dd52e80b9a97a3346020024d17b2c272d6 upstream. of_match_device can return a NULL pointer when matching device is not found. This patch avoids a scenario causing NULL pointer derefernce. Signed-off-by: Aditya Pakki <[email protected]> Cc: stable <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/tty/serial/max310x.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/tty/serial/max310x.c +++ b/drivers/tty/serial/max310x.c @@ -1323,6 +1323,8 @@ static int max310x_spi_probe(struct spi_ if (spi->dev.of_node) { const struct of_device_id *of_id = of_match_device(max310x_dt_ids, &spi->dev); + if (!of_id) + return -ENODEV; devtype = (struct max310x_devtype *)of_id->data; } else {
