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From "Michael Han (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (ZOOKEEPER-3009) Potential NPE in NIOServerCnxnFactory
Date Fri, 15 Jun 2018 06:07:00 GMT

     [ https://issues.apache.org/jira/browse/ZOOKEEPER-3009?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Michael Han reassigned ZOOKEEPER-3009:
--------------------------------------

    Assignee: lujie

> Potential NPE in NIOServerCnxnFactory
> -------------------------------------
>
>                 Key: ZOOKEEPER-3009
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-3009
>             Project: ZooKeeper
>          Issue Type: Bug
>    Affects Versions: 3.6.0
>            Reporter: lujie
>            Assignee: lujie
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 3.6.0, 3.5.5
>
>          Time Spent: 1h
>  Remaining Estimate: 0h
>
> Inspired by ZK-3006 , I develop a simple static analysis tool to find other Potential
NPE like ZK-3006. This bug is found by this tool ,and I have carefully studied it.  But i
am a newbie at here so i may be wrong, hope someone could confirm it and help me improve
this tool.
> h2. Bug description:
>  class NIOServerCnxn has three method :getSocketAddress,getRemoteSocketAddress can return
null just like :
> {code:java}
> // code placeholder
> if (sock.isOpen() == false) {
>   return null;
> }
> {code}
> some of their caller give null checker, some(total 3 list in below) are not. 
> {code:java}
> // ServerCnxn#getConnectionInfo
> Map<String, Object> info = new LinkedHashMap<String, Object>();
> info.put("remote_socket_address", getRemoteSocketAddress());// Map.put will throw NPE
if parameter is null
> //IPAuthenticationProvider#handleAuthentication
> tring id = cnxn.getRemoteSocketAddress().getAddress().getHostAddress();
> cnxn.addAuthInfo(new Id(getScheme(), id));// finally call Set.add(it will throw NPE if
parameter is null )
> //NIOServerCnxnFactory#addCnxn
> InetAddress addr = cnxn.getSocketAddress();
> Set<NIOServerCnxn> set = ipMap.get(addr);// Map.get will throw NPE if parameter
is null{code}
> I think we should add null check in above three caller .
>  



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