GSD-2022-1002648 macsec: fix UAF bug for real_dev

macsec: fix UAF bug for realdev 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 v5.18.3 by commit d130282179aa6051449ac8f8df1115769998a665, it w...