diff --git a/sys/fs/nullfs/null_vnops.c b/sys/fs/nullfs/null_vnops.c
--- a/sys/fs/nullfs/null_vnops.c
+++ b/sys/fs/nullfs/null_vnops.c
@@ -1131,6 +1131,56 @@
 	return (res);
 }
 
+static int
+null_copy_file_range(struct vop_copy_file_range_args *ap)
+{
+	struct vnode *inlvp, *outlvp;
+	struct mount *inlmp, *outlmp;
+	int error;
+
+	if (vn_lock(ap->a_invp, LK_SHARED) == 0) {
+		inlvp = NULLVPTOLOWERVP(ap->a_invp);
+		vref(inlvp);
+		VOP_UNLOCK(ap->a_invp);
+	} else {
+		error = EBADF;
+		goto outi;
+	}
+
+	if (vn_lock(ap->a_outvp, LK_SHARED) == 0) {
+		outlvp = NULLVPTOLOWERVP(ap->a_outvp);
+		vref(outlvp);
+		VOP_UNLOCK(ap->a_outvp);
+	} else {
+		error = EBADF;
+		goto outo;
+	}
+
+	inlmp = inlvp->v_mount;
+	outlmp = outlvp->v_mount;
+	if (inlmp == NULL || outlmp == NULL) {
+		error = EBADF;
+		goto out;
+	}
+
+	if (inlmp == outlmp || strcmp(inlmp->mnt_vfc->vfc_name,
+	    outlmp->mnt_vfc->vfc_name) == 0)
+		error = VOP_COPY_FILE_RANGE(inlvp, ap->a_inoffp, outlvp,
+		    ap->a_outoffp, ap->a_lenp, ap->a_flags, ap->a_incred,
+		    ap->a_outcred, ap->a_fsizetd);
+	else
+		error = vn_generic_copy_file_range(inlvp, ap->a_inoffp, outlvp,
+		    ap->a_outoffp, ap->a_lenp, ap->a_flags, ap->a_incred,
+		    ap->a_outcred, ap->a_fsizetd);
+
+out:
+	vrele(outlvp);
+outo:
+	vrele(inlvp);
+outi:
+	return (error);
+}
+
 /*
  * Global vfs data structures
  */
@@ -1163,5 +1213,6 @@
 	.vop_vptofh =		null_vptofh,
 	.vop_add_writecount =	null_add_writecount,
 	.vop_vput_pair =	null_vput_pair,
+	.vop_copy_file_range =	null_copy_file_range,
 };
 VFS_VOP_VECTOR_REGISTER(null_vnodeops);