ipv6: fix locking issues with loops over idev->addr_list
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 v5.15.46 by commit 7665af570b843f699eaf139609f070d910b7c0d6. For more details please see the references link.