macOS 10.14.3 iOS 12.1.3 XNU - vm_map_copy Optimization which Requires Atomicity isnt Atomic

macOS 10.14.3 iOS 12.1.3 XNU - vmmapcopy Optimization which Requires Atomicity isnt Atomic / vmmapcopyininternal in vmmap.c converts a region of a vmmap into "copied in" form, constructing a vmmapcopy structure representing the copied memory which can then be mapped into another vmmap or the same...