Index: sys/uvm/uvm_bio.c
===================================================================
RCS file: /home/netbsd/src/sys/uvm/uvm_bio.c,v
retrieving revision 1.118
diff -p -u -r1.118 uvm_bio.c
--- sys/uvm/uvm_bio.c	25 Jun 2020 14:04:30 -0000	1.118
+++ sys/uvm/uvm_bio.c	7 Jul 2020 07:49:00 -0000
@@ -614,7 +614,8 @@ again_faultbusy:
 				rw_exit(uobj->vmobjlock);
 				pgs[i] = pg;
 			}
-			pmap_kenter_pa(va + slot_offset + (i << PAGE_SHIFT),
+			pmap_kenter_pa(
+			    trunc_page(va + slot_offset) + (i << PAGE_SHIFT),
 			    VM_PAGE_TO_PHYS(pg),
 			    VM_PROT_READ | VM_PROT_WRITE, 0);
 		}