Index: sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c
===================================================================
--- sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c	(revision 306459)
+++ sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c	(working copy)
@@ -1454,7 +1454,8 @@
 
 	ASSERT_VOP_LOCKED(dvp, __func__);
 #ifdef DIAGNOSTIC
-	ASSERT(!RRM_LOCK_HELD(&zfsvfs->z_teardown_lock));
+	if (!(zdp->z_pflags & ZFS_XATTR))
+		ASSERT(!RRM_LOCK_HELD(&zfsvfs->z_teardown_lock));
 #endif
 
 	if (name[0] == 0 || (name[0] == '.' && name[1] == 0)) {