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

Dave Anderson wrote on 2015/08/03 13:32 -0400: > > > ----- 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 > Hi Dave, Thanks for the reply. Although I didn't use stock fedora/RHEL kernel, I compiled one by myself. Maybe some fedora patches changed the behavior? I've attached the config file. Although I'm not sure if config is related to this problem. > > >> 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. Output attached too. Thanks, Qu >> >> Dave >> >> >> -- >> Crash-utility mailing list >> Crash-utility(a)redhat.com >> https://www.redhat.com/mailman/listinfo/crash-utility >>