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| author | Aditya Pakki <pakki001@umn.edu> | 2019-03-19 02:44:14 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-04-03 07:22:14 +0300 |
| commit | cdae8c6fc96efd376c5c7c1bfcf47a664d13f009 (patch) | |
| tree | 02e8ee43dd47ff8bdac60d59f81619d5c01e71f8 | |
| parent | 9f2c212788923b73f03932d0261a73812e783f8d (diff) | |
| download | linux-cdae8c6fc96efd376c5c7c1bfcf47a664d13f009.tar.xz | |
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>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/tty/serial/max310x.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/tty/serial/max310x.c b/drivers/tty/serial/max310x.c index 0041a64cc86e..9a4024dd9aa8 100644 --- a/drivers/tty/serial/max310x.c +++ b/drivers/tty/serial/max310x.c @@ -1321,6 +1321,8 @@ static int max310x_spi_probe(struct spi_device *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 { |