Bug 123656

Summary:	NX bit interferes with Java JRE 1.4.2
Product:	Red Hat Enterprise Linux 3	Reporter:	Mark Langsdorf <mark.langsdorf>
Component:	kernel	Assignee:	Jim Paradis <jparadis>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	3.0	CC:	barryn, bwthomas, greg.marsden, hui.huang, jparadis, pekkas, peterm, petrides, rick.stern, riel, tao
Target Milestone:	---
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2004-12-15 22:09:53 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Mark Langsdorf 2004-05-19 20:55:30 UTC

Description of problem:
Sun Java JRE 1.4.2 crashes during execution if the noexecute option 
is enabled in RHEL3 U2 for AMD64.  The application does not crash if 
the 'noexec=off' command line parameter is passed to the kernel.

Version-Release number of selected component (if applicable):
Sun J2SE JRE 1.4.2
kernel 2.4.21-15EL

How reproducible:
Always.

Steps to Reproduce:
1.  Install RHEL3 U2 for AMD64 on an Opteron system.
2.  Install 32-bit Java JRE 1.4.2 on the same system.
3.  run `/usr/java/j2re1.4.2_04/bin/java -version` and observe 
unsightly crash message.
4.  Reboot system and pass `noexec=off` as a kernel boot paramater.
5.  Rerun `/usr/java/j2re1.4.2_04/bin/java -version` and observe 
"Java version 1.4.2_04"
  
Actual results:
huge ugly crash message

Expected results:
Java version "1.4.2_04"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_04-b05)
Java HotSpot(TM) Client VM (build 1.4.2_04-b05, mixed mode)

Additional info:

Comment 1 Hui Huang 2004-05-21 21:38:30 UTC

The support for NX bit has been added to Sun JDK 1.4.2_05
and 1.5-beta2. Both are in testing right now and will be
released to the public very soon. As Mark mentioned, boot
with 'noexec=off' will work around the problem.

If the change was made by mistake please fix it as soon as
possible; if it was made for security reasons, it should
be well documented in the release notes.

Comment 2 Bradley Thomas 2004-07-16 18:13:03 UTC

Is there an update you can provide on how testing has proceeded?  Has 
the version of the JDK with this fix now publicly available?

Comment 4 Jim Paradis 2004-08-23 23:34:04 UTC

This is indeed fixed as of 2.4.21-19.EL  Be aware, though, that there
is another outstanding Java issue: Bug 128735.

Comment 5 John Flanagan 2004-09-02 04:31:37 UTC

An errata has been issued which should help the problem 
described in this bug report. This report is therefore being 
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files, 
please follow the link below. You may reopen this bug report 
if the solution does not work for you.

http://rhn.redhat.com/errata/RHBA-2004-433.html

Comment 6 Pekka Savola 2004-12-15 11:43:28 UTC

We've noted the same problem but the bug appears to be fixed only with
UP, so re-opening.

With SMP, it's still there (or at least one with similar symptoms) in
kernel-smp-2.4.21-20.0.1.EL.

Either using UP or passing noexec=off fixes the problem for that kernel.

The only related/similar PR I could find was #137138.

(note: 128735 above is non-public report.)

Comment 7 Ernie Petrides 2004-12-15 22:09:53 UTC

Hello, Pekka.  The problem originally reported in this bug was fixed
in U3.  A variant of the problem, which I believe you've encountered,
has been fixed in U4 (related bugs are 137138, 137464, 142749).

I'm reclosing this bug.  Please feel free to test out the beta version
of U4 here:

  ftp://partners.redhat.com/a61d109e2483b0bf579b0b5f90a5ea8c/2.4.21-27.EL/

U4 is scheduled for release on Monday (12/20).  I've made bug 128735 public,
and I expect that one to be resolved with U4 as well.

Comment 8 Ingo Molnar 2005-01-04 12:54:58 UTC

*** Bug 139930 has been marked as a duplicate of this bug. ***