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D32525.diff

diff --git a/sys/amd64/amd64/pmap.c b/sys/amd64/amd64/pmap.c
--- a/sys/amd64/amd64/pmap.c
+++ b/sys/amd64/amd64/pmap.c
@@ -4293,6 +4293,7 @@
pml5_entry_t *pm_pml5u;
pm_pml5u = (pml5_entry_t *)PHYS_TO_DMAP(VM_PAGE_TO_PHYS(pml5pgu));
+ pagezero(pm_pml5u);
/*
* Add pml5 entry at top of KVA pointing to existing pml4 pti

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