Re: [Crash-utility] Crash fails to analyse kernel dump from 4.2-rc4

----- Original Message ----- > Hi all, > > I updated my kernel to 4.2-rc4 but suddenly crash failed to analyse the > kernel with the following error message: > ------ > crash: invalid kernel virtual address: 170000001d type: "possible" > WARNING: cannot read cpu_possible_map > crash: invalid kernel virtual address: 3800000046 type: "present" > WARNING: cannot read cpu_present_map > crash: invalid kernel virtual address: 240000002d type: "online" > WARNING: cannot read cpu_online_map > crash: invalid kernel virtual address: 570000006e type: "active" > WARNING: cannot read cpu_active_map > crash: cannot determine base kernel version > crash: /home/adam/linux-btrfs/vmlinux and vmcore do not match! > ------ > > Crash 7.1.0 and 7.1.2 fails with the same error. > > Previously I'm testing 4.2-rc1 kernel and 7.1.0 works like a charm. > > So is there something wrong with the new kernel? > > Thanks, > Qu The most recent kernel version I've tested is Fedora's 4.2.0-0.rc4.git1.1.fc23.x86_64, although I'm not sure how that version correlates with upstream 4.2-rc1. It is based upon linux-4.1.tar.xz with a bunch of patches.

Here is a live system session with the Fedora version of crash: # crash crash 7.1.2-1.fc23 Copyright (C) 2002-2014 Red Hat, Inc. Copyright (C) 2004, 2005, 2006, 2010 IBM Corporation Copyright (C) 1999-2006 Hewlett-Packard Co Copyright (C) 2005, 2006, 2011, 2012 Fujitsu Limited Copyright (C) 2006, 2007 VA Linux Systems Japan K.K. Copyright (C) 2005, 2011 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 (GDB) 7.6 Copyright (C) 2013 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-unknown-linux-gnu"... KERNEL: /usr/lib/debug/lib/modules/4.2.0-0.rc4.git1.1.fc23.x86_64/vmlinux DUMPFILE: /dev/crash CPUS: 160 DATE: Mon Aug 3 13:00:49 2015 UPTIME: 03:58:44 LOAD AVERAGE: 0.59, 0.36, 0.17 TASKS: 1714 NODENAME: hp-dl980g7-02.rhts.eng.bos.redhat.com RELEASE: 4.2.0-0.rc4.git1.1.fc23.x86_64 VERSION: #1 SMP Tue Jul 28 20:21:39 UTC 2015 MACHINE: x86_64 (2261 Mhz) MEMORY: 1006 GB PID: 38013 COMMAND: "crash" TASK: ffff881f668e6400 [THREAD_INFO: ffff881f68ad0000] CPU: 61 STATE: TASK_RUNNING (ACTIVE) crash> Can you run on the live system? If so, it's most likely an issue with the vmcore. Post the output of "crash -d8 vmlinux vmcore". The debug output may yield some clues. Dave -- Crash-utility mailing list Crash-utility(a)redhat.com https://www.redhat.com/mailman/listinfo/crash-utility