| From: Aditya Pakki <pakki001@umn.edu> |
| Date: Mon, 18 Mar 2019 18:44:14 -0500 |
| Subject: serial: max310x: Fix to avoid potential NULL pointer dereference |
| |
| 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 <pakki001@umn.edu> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| Signed-off-by: Ben Hutchings <ben@decadent.org.uk> |
| --- |
| drivers/tty/serial/max310x.c | 2 ++ |
| 1 file changed, 2 insertions(+) |
| |
| --- a/drivers/tty/serial/max310x.c |
| +++ b/drivers/tty/serial/max310x.c |
| @@ -1324,6 +1324,8 @@ 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 { |
