Staging: sb105x: info leak in mp_get_count()

commit a8b33654 upstream.

The icount.reserved[] array isn't initialized so it leaks stack
information to userspace.
Reported-by: Nico Golde <nico@ngolde.de>
Reported-by: Fabian Yamaguchi <fabs@goesec.de>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/sb105x/sb_pci_mp.c

@@ -1063,7 +1063,7 @@ static int mp_wait_modem_status(struct sb_uart_state *state, unsigned long arg)
 
 static int mp_get_count(struct sb_uart_state *state, struct serial_icounter_struct *icnt)
 {
-	struct serial_icounter_struct icount;
+	struct serial_icounter_struct icount = {};
 	struct sb_uart_icount cnow;
 	struct sb_uart_port *port = state->port;