Red Hat Bugzilla – Bug 123656
NX bit interferes with Java JRE 1.4.2
Last modified: 2013-08-05 21:07:00 EDT
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:
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.
Is there an update you can provide on how testing has proceeded? Has the version of the JDK with this fix now publicly available?
This is indeed fixed as of 2.4.21-19.EL Be aware, though, that there is another outstanding Java issue: Bug 128735.
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
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.)
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.
*** Bug 139930 has been marked as a duplicate of this bug. ***