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 v5.4.167 by commit c0315e93552e0d840e9edc6abd71c7db82ec8f51. For more details please see the references link.