static int get_dotl_openflags(V9fsState *s, int oflags)
{
    int flags;
    /*
     * Filter the client open flags
     */
    flags = dotl_to_open_flags(oflags);
    flags &= ~(O_NOCTTY | O_ASYNC | O_CREAT);
    /*
     * Ignore direct disk access hint until the server supports it.
     */
    flags &= ~O_DIRECT;
    return flags;
}

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.