xen/gnttab: fix gnttabendforeign_access() without page specified
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 v5.16.14 by commit 6d168929b4c497a8c1945dd71e467b2db12bbad2. For more details please see the references link.