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Bug 1198780 - [IPv6] Java based gears can not use IPv6 connectivity
Summary: [IPv6] Java based gears can not use IPv6 connectivity
Keywords:
Status: CLOSED WONTFIX
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: java-1.7.0-openjdk
Version: 6.6
Hardware: All
OS: Linux
high
high
Target Milestone: rc
: ---
Assignee: Andrew John Hughes
QA Contact: BaseOS QE - Apps
URL:
Whiteboard:
: 1160657 (view as bug list)
Depends On:
Blocks: 871569 1172231 1269194 1273542
TreeView+ depends on / blocked
 
Reported: 2015-03-04 19:38 UTC by Josep 'Pep' Turro Mauri
Modified: 2019-10-10 09:39 UTC (History)
18 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2016-08-09 18:45:07 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Knowledge Base (Solution) 1534583 0 None None None Never

Description Josep 'Pep' Turro Mauri 2015-03-04 19:38:35 UTC 
Description of problem:

Java applications running inside an OpenShift gear can not use IPv6 connectivity. This includes e.g. trying to connect from an app to an external service that is provided via IPv6; or using Jenkins on an IPv6 based OSE deployment.

This is because the JVM tries to determine if the system has IPv6 enabled by reading /proc/net/if_inet6, which has SELinux type proc_net_t. This access is denied by SELinux by design (CVE-2014-3602).

Version-Release number of selected component (if applicable):
OpenShift 2.2.x, java-1.7.0-openjdk-1.7.0.75-2.5.4.0.el6_6

How reproducible:
Always

Steps to Reproduce:
1. Have an OpenShift environment with IPv6 enabled
2. From within a gear, try to run a Java application that connects to an IPv6 based service

Actual results:

    Exception in thread "main" java.net.SocketException: Protocol family unavailable
	    at java.net.PlainSocketImpl.socketConnect(Native Method)
	    at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
	    at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
	    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
	    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	    at java.net.Socket.connect(Socket.java:579)
            ...

Expected results:

Ideally it should be possible to use IPv6 from within a gear to access IPv6 services.

Additional info:

It seems that openJDK on Linux uses /proc/net/if_inet6 to decide if the system supports IPv6:

http://hg.openjdk.java.net/jdk7/jdk7/jdk/file/9b8c96f96a0f/src/solaris/native/java/net/net_util_md.c#l308

which fails due to SELinux:

type=AVC msg=audit(1425497336.028:3867): avc:  denied  { read } for  pid=1494 comm="java" name="if_inet6" dev=proc ino=4026532162 scontext=unconfined_u:system_r:openshift_t:s0:c2,c614 tcontext=system_u:object_r:proc_net_t:s0 tclass=file
type=AVC msg=audit(1425497336.028:3867): avc:  denied  { open } for  pid=1494 comm="java" name="if_inet6" dev=proc ino=4026532162 scontext=unconfined_u:system_r:openshift_t:s0:c2,c614 tcontext=system_u:object_r:proc_net_t:s0 tclass=file
Comment 11 Brenton Leanhardt 2015-03-23 14:08:26 UTC 
*** Bug 1160657 has been marked as a duplicate of this bug. ***
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