cifs_find_smb_ses(struct TCP_Server_Info *server, char *username)
 {
	struct list_head *tmp;
 	struct cifsSesInfo *ses;
 
 	write_lock(&cifs_tcp_ses_lock);
	list_for_each(tmp, &server->smb_ses_list) {
		ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list);
		if (strncmp(ses->userName, username, MAX_USERNAME_SIZE))
			continue;
 		++ses->ses_count;
 		write_unlock(&cifs_tcp_ses_lock);
 		return ses;
	}
	write_unlock(&cifs_tcp_ses_lock);
	return NULL;
}

This category addresses vulnerabilities caused by flawed access control mechanisms, where incorrect permission settings allow unauthorized users to access restricted resources.