mm/mempolicy: fix mpolnew leak in sharedpolicy_replace
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 v5.15.34 by commit 198932a14aeb19a15cf19e51e151d023bc4cd648, it was introduced in version v3.8 by commit 42288fe366c4f1ce7522bc9f27d0bc2a81c55264. For more details please see the references link.