mm/mempolicy: fix uninit-value in mpolrebindpolicy()
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 v4.9.325 by commit 5735845906fb1d90fe597f8b503fc0a857d475e3. For more details please see the references link.