we found some common using issues about the use of CLI unformat, as follow:

u16 out_port = 0;

u32 vrf_id = 0, protocol;

else if (unformat (line_input, "%U %u", unformat_ip4_address,

&out_addr, &out_port))

when inputing u16 or u8 type param(not u32)， the  local variable which behind of "out_port" in stack will be overwrited, is that right? is there some Notes about this?

I think the bellow code maybe  cause that issue.

unformat->va_unformat->do_percent->unformat_integer-> *(u32 *) v = value;

such as:

nat64_add_del_static_bib_command_fn

....