void ipxitf_down(struct ipx_interface *intrfc)
{
	spin_lock_bh(&ipx_interfaces_lock);
	__ipxitf_down(intrfc);
	spin_unlock_bh(&ipx_interfaces_lock);
}

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.