nfsd: Fix memleak

When free nfs-client, it must free the ->cl_stateids.

Cc: stable@kernel.org
Signed-off-by: Jianpeng Ma <majianpeng@gmail.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

fs/nfsd/nfs4state.c

@@ -1060,6 +1060,8 @@ free_client(struct nfs4_client *clp)
 	}
 	free_svc_cred(&clp->cl_cred);
 	kfree(clp->cl_name.data);
+	idr_remove_all(&clp->cl_stateids);
+	idr_destroy(&clp->cl_stateids);
 	kfree(clp);
 }