void rds_conn_drop(struct rds_connection *conn)
{
	atomic_set(&conn->c_state, RDS_CONN_ERROR);
	queue_work(rds_wq, &conn->c_down_w);
}

The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.