net: netlink: af_netlink: Prevent empty skb by adding a check on len.
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v4.19.222 by commit ff3f517bf7138e01a17369042908a3f345c0ee41. For more details please see the references link.