static void stat_to_qid(const struct stat *stbuf, V9fsQID *qidp)
{
    size_t size;

    memset(&qidp->path, 0, sizeof(qidp->path));
    size = MIN(sizeof(stbuf->st_ino), sizeof(qidp->path));
    memcpy(&qidp->path, &stbuf->st_ino, size);
    qidp->version = stbuf->st_mtime ^ (stbuf->st_size << 8);
    qidp->type = 0;
    if (S_ISDIR(stbuf->st_mode)) {
        qidp->type |= P9_QID_TYPE_DIR;
    }
    if (S_ISLNK(stbuf->st_mode)) {
        qidp->type |= P9_QID_TYPE_SYMLINK;
    }
}

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.