--- zzzz-none-000/linux-5.4.213/net/xfrm/xfrm_device.c	2022-09-15 10:04:56.000000000 +0000
+++ alder-5690pro-762/linux-5.4.213/net/xfrm/xfrm_device.c	2024-08-14 09:02:15.000000000 +0000
@@ -275,8 +275,9 @@
 		return false;
 
 	if ((!dev || (dev == xfrm_dst_path(dst)->dev)) &&
-	    (!xdst->child->xfrm)) {
-		mtu = xfrm_state_mtu(x, xdst->child_mtu_cached);
+	    (!xdst->child->xfrm && x->type->get_mtu)) {
+		mtu = x->type->get_mtu(x, xdst->child_mtu_cached);
+
 		if (skb->len <= mtu)
 			goto ok;