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

----- Original Message ----- > > > ----- 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. FYI, the changelog of the Fedora kernel-4.2.0-0.rc4.git1.1.fc23 package indicates that it is based upon Linux v4.2-rc4. Dave

> 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 >