Input: fix potential overflows in driver/input/joystick

Change all sprintfs into snprintfs to make sure we won't stomp on
data adjacent to our buffers.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

drivers/input/joystick/gamecon.c

@@ -761,7 +761,8 @@ static struct gc __init *gc_probe(int parport, int *pads, int n_pads)
 		if (!pads[i])
 			continue;
 
-		sprintf(gc->phys[i], "%s/input%d", gc->pd->port->name, i);
+		snprintf(gc->phys[i], sizeof(gc->phys[i]),
+			 "%s/input%d", gc->pd->port->name, i);
 		err = gc_setup_pad(gc, i, pads[i]);
 		if (err)
 			goto err_unreg_devs;