GSD-2022-1001749 ax25: fix UAF bug in ax25_send_control()

ax25: fix UAF bug in ax25sendcontrol 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 v5.15.35 by commit 1bf8946d5826788c82971977245bcd3313678eac...