44. Bus Error Checker

How do you plan to solve it?

module error_checker_xz(
    input [7:0]bus,
    output reg all_known,has_unknown,
    output reg [7:0]bus_if_known
);
always@(*)begin
    if(bus==bus && bus===bus)begin
        all_known=1'b1;
        has_unknown = 1'b 0;
        bus_if_known = bus;
    end
    else begin
         all_known=1'b0;
        has_unknown = 1'b 1;
        bus_if_known = 8'b0;
end
end
endmodule