xen/arm: Fix race in RB-tree based P2M accounting
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 v4.9.322 by commit 856d1b8e6e826b5087f1ea3fdbabda3557d73599. For more details please see the references link.