[PATCH 3.16 121/133] USB: serial: console: fix use-after-free after failed setup

From: Ben Hutchings
Date: Tue Nov 21 2017 - 21:50:10 EST

3.16.51-rc1 review patch. If anyone has any objections, please let me know.


From: Johan Hovold <johan@xxxxxxxxxx>

commit 299d7572e46f98534033a9e65973f13ad1ce9047 upstream.

Make sure to reset the USB-console port pointer when console setup fails
in order to avoid having the struct usb_serial be prematurely freed by
the console code when the device is later disconnected.

Fixes: 73e487fdb75f ("[PATCH] USB console: fix disconnection issues")
Acked-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Johan Hovold <johan@xxxxxxxxxx>
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
drivers/usb/serial/console.c | 1 +
1 file changed, 1 insertion(+)

--- a/drivers/usb/serial/console.c
+++ b/drivers/usb/serial/console.c
@@ -187,6 +187,7 @@ static int usb_console_setup(struct cons
port->port.count = 0;
+ info->port = NULL;