net/afpacket: check len when minheader_len equals to 0
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 v5.4.212 by commit 25a80e728412739bf39f02d834c7688a1c1abe07, it was introduced in version v5.4.212 by commit 8b68e53d56697a59b5c53893b53f508bbdf272a0. For more details please see the references link.