USB: kobil: fix memory leak

An urb transfer buffer is allocated at every open but was never freed.

This driver is a bit of a mess...

Cc: stable <stable@kernel.org>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/usb/serial/kobil_sct.c b/drivers/usb/serial/kobil_sct.c
index c113a2a0e10..bd5bd8589e0 100644
--- a/drivers/usb/serial/kobil_sct.c
+++ b/drivers/usb/serial/kobil_sct.c
@@ -345,7 +345,8 @@ static void kobil_close(struct usb_serial_port *port)
 
         /* FIXME: Add rts/dtr methods */
         if (port->write_urb) {
-                usb_kill_urb(port->write_urb);
+                usb_poison_urb(port->write_urb);
+                kfree(port->write_urb->transfer_buffer);
                 usb_free_urb(port->write_urb);
                 port->write_urb = NULL;
         }