nfsd4: seq->status_flags may be used unitialized

Reported-by: Gopala Suryanarayana <gsuryanarayana@vmware.com>
Signed-off-by: Benny Halevy <bhalevy@tonian.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

fs/nfsd/nfs4state.c

@@ -1947,11 +1947,13 @@ nfsd4_sequence(struct svc_rqst *rqstp,
 		atomic_inc(&clp->cl_refcount);
 		switch (clp->cl_cb_state) {
 		case NFSD4_CB_DOWN:
-			seq->status_flags |= SEQ4_STATUS_CB_PATH_DOWN;
+			seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN;
 			break;
 		case NFSD4_CB_FAULT:
-			seq->status_flags |= SEQ4_STATUS_BACKCHANNEL_FAULT;
+			seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT;
 			break;
+		default:
+			seq->status_flags = 0;
 		}
 	}
 	kfree(conn);