diff --git a/sys/vm/vm_page.c b/sys/vm/vm_page.c
--- a/sys/vm/vm_page.c
+++ b/sys/vm/vm_page.c
@@ -4882,6 +4882,7 @@
 		if ((allocflags &
 		    (VM_ALLOC_NOWAIT | VM_ALLOC_WAITFAIL)) != 0)
 			return (NULL);
+		pctrie_iter_reset(&pages);
 	}
 	vm_page_grab_release(m, allocflags);
 
@@ -5124,6 +5125,7 @@
 			vm_page_launder(m);
 			break;
 		}
+		pctrie_iter_reset(&pages);
 	}
 
 	pmap_zero_page_area(m, base, end - base);