------- Comment From a...@de.ibm.com 2018-09-24 02:57 EDT------- the crash version from ppa:cascardo/kdump2 works
# apt show crash Package: crash Version: 7.2.3+real-1~16.04.1 ... -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to crash in Ubuntu. https://bugs.launchpad.net/bugs/1779187 Title: Ubuntu 16.04.4: crash can not open dumps: "crash: invalid structure member offset: task_struct_pids" Status in Ubuntu on IBM z Systems: In Progress Status in crash package in Ubuntu: In Progress Bug description: Ubuntu 16.04 on IBM z: crash can not open dumps gathered on 4.13.0-39 crash: invalid structure member offset: task_struct_pids FILE: task.c LINE: 2102 FUNCTION: refresh_hlist_task_table_v3() ---uname output--- Linux fvtc2i 4.13.0-39-generic #44~16.04.1-Ubuntu SMP Thu Apr 5 16:41:28 UTC 2018 s390x s390x s390x GNU/Linux ---Additional Hardware Info--- none Machine Type = lpar type 3906, model 400 LM2 ---Debugger--- A debugger is not configured ---Steps to Reproduce--- crash vmlinux-4.13.0-39-generic dump.201806150854 or crash vmlinux-4.13.0-39-generic Userspace tool common name: crash The userspace tool has the following bit modes: 64 Userspace rpm: crash,crash-dbgsym 7.1.4-1ubuntu4.2 s390x Userspace tool obtained from project website: na We came across this issue while trying to extract traces from a vmcore gathered on one of our Ubuntu 16.04 nodes running HWE kernel (4.13) It seems crash cannot open this dump # crash vmlinux-4.13.0-39-generic dump.201806150854 crash 7.1.4 Copyright (C) 2002-2015 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 "s390x-ibm-linux-gnu"... WARNING: cannot determine MAX_PHYSMEM_BITS please wait... (gathering task table data) crash: invalid structure member offset: task_struct_pids FILE: task.c LINE: 2102 FUNCTION: refresh_hlist_task_table_v3() [/usr/bin/crash] error trace: 116ed1ed8 => 116ec4b14 => 116f25eec => 116f25e48 this issue is 100% reproducible. An attempt to analyze the live system is failing with exact the same error. # crash vmlinux-4.13.0-39-generic crash 7.1.4 ... WARNING: cannot determine MAX_PHYSMEM_BITS crash: invalid structure member offset: task_struct_pids FILE: task.c LINE: 2102 FUNCTION: refresh_hlist_task_table_v3() [/usr/bin/crash] error trace: 1260d1ed8 => 1260c4b14 => 126125eec => 126125e48 it seems that crash version 7.2.1 shipped with Ubuntu 18.04 can handle dumps taken on kernel 4.13, so we have at least a workaround. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-z-systems/+bug/1779187/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
