Index: head/stand/fdt/fdt_loader_cmd.c
===================================================================
--- head/stand/fdt/fdt_loader_cmd.c
+++ head/stand/fdt/fdt_loader_cmd.c
@@ -386,7 +386,8 @@
 	for (fp = file_findfile(NULL, "dtbo"); fp != NULL; fp = fp->f_next) {
 		printf("applying DTB overlay '%s'\n", fp->f_name);
 		COPYOUT(fp->f_addr, overlay, fp->f_size);
-		fdt_overlay_apply(new_fdtp, overlay, fp->f_size);
+		/* Both overlay and new_fdtp may be modified in place */
+		fdt_overlay_apply(new_fdtp, overlay);
 	}
 
 	free(fdtp);
Index: head/stand/fdt/fdt_overlay.h
===================================================================
--- head/stand/fdt/fdt_overlay.h
+++ head/stand/fdt/fdt_overlay.h
@@ -29,6 +29,6 @@
 #ifndef FDT_OVERLAY_H
 #define FDT_OVERLAY_H
 
-int fdt_overlay_apply(void *main_fdtp, void *overlay_fdtp, size_t overlay_length);
+int fdt_overlay_apply(void *main_fdtp, void *overlay_fdtp);
 
 #endif /* FDT_OVERLAY_H */
Index: head/stand/fdt/fdt_overlay.c
===================================================================
--- head/stand/fdt/fdt_overlay.c
+++ head/stand/fdt/fdt_overlay.c
@@ -409,41 +409,23 @@
 }
 
 int
-fdt_overlay_apply(void *main_fdtp, void *overlay_fdtp, size_t overlay_length)
+fdt_overlay_apply(void *main_fdtp, void *overlay_fdtp)
 {
-	void *overlay_copy;
-	int rv;
 
-	rv = 0;
-
-	/* We modify overlay in-place, so we need writable copy */
-	overlay_copy = malloc(overlay_length);
-	if (overlay_copy == NULL) {
-		printf("failed to allocate memory for overlay copy\n");
+	if (fdt_overlay_do_fixups(main_fdtp, overlay_fdtp) < 0) {
+		printf("failed to perform fixups in overlay\n");
 		return (-1);
 	}
 
-	memcpy(overlay_copy, overlay_fdtp, overlay_length);
-
-	if (fdt_overlay_do_fixups(main_fdtp, overlay_copy) < 0) {
-		printf("failed to perform fixups in overlay\n");
-		rv = -1;
-		goto out;
-	}
-
-	if (fdt_overlay_do_local_fixups(main_fdtp, overlay_copy) < 0) {
+	if (fdt_overlay_do_local_fixups(main_fdtp, overlay_fdtp) < 0) {
 		printf("failed to perform local fixups in overlay\n");
-		rv = -1;
-		goto out;
+		return (-1);
 	}
 
-	if (fdt_overlay_apply_fragments(main_fdtp, overlay_copy) < 0) {
+	if (fdt_overlay_apply_fragments(main_fdtp, overlay_fdtp) < 0) {
 		printf("failed to apply fragments\n");
-		rv = -1;
+		return (-1);
 	}
 
-out:
-	free(overlay_copy);
-
-	return (rv);
+	return (0);
 }