Bug 646543 - OpenJDK RHEL5/6 backport patch to limit executable memory access for CodeCache only
Summary: OpenJDK RHEL5/6 backport patch to limit executable memory access for CodeCac...
Keywords:
Status: CLOSED CURRENTRELEASE
Alias: None
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: Unspecified
OS: Unspecified
low
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2010-10-25 16:19 UTC by Marc Schoenefeld
Modified: 2016-06-13 13:27 UTC (History)
5 users (show)

Fixed In Version: java-1.6.0-openjdk-1.6.0.0-1.39.1.9.7.el6
Clone Of:
Environment:
Last Closed: 2016-06-10 22:24:52 UTC
Embargoed:

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Description Marc Schoenefeld 2010-10-25 16:19:57 UTC 
From: http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6541756

"Description 	

A customer pointed out a concern that our VM was mapping our C-heap allocation
as all read-write-execute. We do require "executable" access for our
CodeCache, but should not require it for the rest of the C-heap.
Posted Date : 2007-04-02 21:02:10.0

Work Around 	

N/A

Evaluation 	

Fix in progress.  Set execute bit on only the code cache.
Posted Date : 2009-03-23 18:04:11.0

http://hg.openjdk.java.net/jdk7/hotspot-rt/hotspot/rev/6bdd6923ba16
Posted Date : 2009-03-26 14:20:57.0"

The request is to backport this patch to be usable in RHEL5/6 OpenJDK as 
defense-in-depth measure.
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