mm/mempolicy: fix get_nodes out of bound access
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 v5.19.2 by commit d1b5113674c3e95bb53c601ce2ea4719e851c74d, it was introduced in version v5.15 by commit e130242dc351f1cfa2bbeb6766a1486ce936ef88. For more details please see the references link.