Description of problem: The RHEL5.8 errata version of crash is long overdue for a rebase to the upstream version of the crash utility. It is far more efficient, and far safer, to rebase to the upstream version than to attempt to selectively backport the patches required for the current set of bugzillas requested for RHEL5.8. Furthermore, the new features and other fixes that have been applied to the upstream version make the tool significantly more useful than the current RHEL5 version. And although the RHEL5 version of the crash utility by definition is for support of RHEL5 kernels, since the introduction of KVM for RHEL5, it is very possible that there may be RHEL6 guest dumpfiles taken with "virsh dump" on a RHEL5 KVM host, and those dumpfiles are physically located on the RHEL5 KVM host machine. Therefore a much more recent crash version that the very old 4.1.2 base would be required. As the owner and upstream maintainer, one of my primary goals is, and always has been, to maintain backwards-compatibility whenever new fixes or features are applied. Therefore the risk of regression is less with a rebase than it would be with selective backports because the RHEL5.8 bugzilla-requested fixes are based upon the state of the upstream version. It should be noted that nothing goes into the upstream version without my approval, and my testing. I perform all my testing against a sample set of RHEL3, RHEL4, RHEL5, RHEL6, upstream and Fedora kernel crash dumps. Details regarding recent fixes, features and enhancements can be found in: http://people.redhat.com/anderson/crash.changelog.html Version-Release number of selected component (if applicable): crash-4.1.2-8.el5 the upstream version of crash is now at crash-5.1.6 How reproducible: Steps to Reproduce: 1. 2. 3. Actual results: Expected results: Additional info:
Technical note added. If any revisions are required, please edit the "Technical Notes" field accordingly. All revisions will be proofread by the Engineering Content Services team. New Contents: The crash packages are used to investigate live systems and kernel core dumps created from the netdump, diskdump, kdump and virsh dump facilities. With this update, Crash has been rebased to upstream version 5.1.x. For a complete list of bug fixes and enhancements, refer to the upstream changelog at http://people.redhat.com/anderson/crash.changelog.html
> And although the RHEL5 version of the crash utility by definition is for > support of RHEL5 kernels, since the introduction of KVM for RHEL5, it > is very possible that there may be RHEL6 guest dumpfiles taken with > "virsh dump" on a RHEL5 KVM host, and those dumpfiles are physically > located on the RHEL5 KVM host machine. Therefore a much more recent > crash version that the very old 4.1.2 base would be required. Han Pingtian posted an example of this situation in another BZ: https://bugzilla.redhat.com/show_bug.cgi?id=716327#c6 https://bugzilla.redhat.com/show_bug.cgi?id=716327#c7
According to Dave's suggestion, I copying the comments here: I just notice that 6.1 Xen HVM guest vmcore get by Xen's auto-dump-when-crashed function also cannot be analysed by 5.7's crash, but can be analysed by 6.1's: [root@hp-bl495cg5-02 ~]# crash vmlinux /var/lib/xen/dump/2011-0629-0054.42-rhel61_x86_64_hvm.2.core crash 4.1.2-8.el5 Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 Red Hat, Inc. Copyright (C) 2004, 2005, 2006 IBM Corporation Copyright (C) 1999-2006 Hewlett-Packard Co Copyright (C) 2005, 2006 Fujitsu Limited Copyright (C) 2006, 2007 VA Linux Systems Japan K.K. Copyright (C) 2005 NEC Corporation Copyright (C) 1999, 2002, 2007 Silicon Graphics, Inc. Copyright (C) 1999, 2000, 2001, 2002 Mission Critical Linux, Inc. This program is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Enter "help copying" to see the conditions. This program has absolutely no warranty. Enter "help warranty" for details. GNU gdb 6.1 Copyright 2004 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Type "show copying" to see the conditions. There is absolutely no warranty for GDB. Type "show warranty" for details. This GDB was configured as "x86_64-unknown-linux-gnu"... crash: invalid kernel virtual address: 373b415bf39e96dd type: "possible" WARNING: cannot read cpu_possible_map crash: invalid kernel virtual address: ed01608e81bf816c type: "present" WARNING: cannot read cpu_present_map crash: invalid kernel virtual address: 500e81dd485d03c1 type: "online" WARNING: cannot read cpu_online_map crash: cannot determine base kernel version crash: vmlinux and /var/lib/xen/dump/2011-0629-0054.42-rhel61_x86_64_hvm.2.core do not match! Usage: crash [-h [opt]][-v][-s][-i file][-d num] [-S] [mapfile] [namelist] [dumpfile] Enter "crash -h" for details.
Technical note updated. If any revisions are required, please edit the "Technical Notes" field accordingly. All revisions will be proofread by the Engineering Content Services team. Diffed Contents: @@ -1,4 +1,4 @@ The crash packages are used to investigate live systems and kernel core dumps created from the netdump, diskdump, kdump and virsh dump facilities. -With this update, Crash has been rebased to upstream version 5.1.x. For a complete list of bug fixes and enhancements, refer to the upstream changelog at http://people.redhat.com/anderson/crash.changelog.html+With this update, Crash has been rebased to upstream version 5.1.8. For a complete list of bug fixes and enhancements, refer to the upstream changelog at http://people.redhat.com/anderson/crash.changelog.html
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. http://rhn.redhat.com/errata/RHBA-2012-0203.html