Index: sys/arm64/arm64/pmap.c
===================================================================
--- sys/arm64/arm64/pmap.c
+++ sys/arm64/arm64/pmap.c
@@ -6832,8 +6832,12 @@
 			 * The translation fault may have occurred within a
 			 * critical section.  Therefore, we must check the
 			 * address without acquiring the kernel pmap's lock.
+			 *
+			 * If the address is in DMAP and fault occured, it
+			 * means it's not part of a valid region and therefore
+			 * there is no valid translation to phys address.
 			 */
-			if (pmap_kextract(far) != 0)
+			if (!VIRT_IN_DMAP(far) && pmap_kextract(far) != 0)
 				rv = KERN_SUCCESS;
 		} else {
 			PMAP_LOCK(pmap);