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 v5.10.121 by commit 5bfb65e92ff36cba3bf52e24a04af80ffb41bcf5. For more details please see the references link.