My static checker complains that this sprintf() can overflow but really
it can't.  Just silence the warning by using snprintf().
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: NAmit Shah <amit.shah@redhat.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>