Andreas Kling 0a83c03546 Kernel: Don't unregister Region from RegionTree *before* unmapping it ...

If we unregister from the RegionTree before unmapping, there's a race
where a new region can get inserted at the same address that we're about
to unmap. If this happens, ~Region() will then unmap the newly inserted
region, which now finds itself with cleared-out page table entries.

2022-04-05 13:46:50 +02:00

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