[PATCH 3.19 080/177] USB: mxuport: fix null deref when used as a console

Greg Kroah-Hartman
2015-03-16T14:14:36Z

From: Johan Hovold <johan@kernel.org>

commit db81de767e375743ebb0ad2bcad3326962c2b67e upstream.

Fix null-pointer dereference at probe when the device is used as a
console, in which case the tty argument to open will be NULL.

Fixes: ee467a1f2066 ("USB: serial: add Moxa UPORT 12XX/14XX/16XX
driver")
Signed-off-by: Johan Hovold <johan@kernel.org>
Acked-by: Greg Kroah-Hartman <greg@kroah.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/usb/serial/mxuport.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/usb/serial/mxuport.c
+++ b/drivers/usb/serial/mxuport.c
@@ -1284,7 +1284,8 @@ static int mxuport_open(struct tty_struc
}

/* Initial port termios */
- mxuport_set_termios(tty, port, NULL);
+ if (tty)
+ mxuport_set_termios(tty, port, NULL);

/*
* TODO: use RQ_VENDOR_GET_MSR, once we know what it