Sorry about the lying in the regression potential. It probably referred to a previous backport attempt, that only applied the respective patch. As we discussed a few months ago, kexec/kdump/crash would be backported because of their relationship with the linux package, and its siblings linux-lts, linux-hwe, etc. That doesn't mean we shouldn't or can't test the packages more thoroughly. That's why I introduced ADT support to kdump, and would like to work on more testing for those packages. Right now, I can do more manual testing for this, and add my results to the bug.
Thanks for bringing this up. Cascardo. -- 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/1765660 Title: Ubuntu 18.04 [ briggs ]: "ipcs" command fails with error "invalid structure member offset" in crash prompt. Status in The Ubuntu-power-systems project: In Progress Status in crash package in Ubuntu: Fix Released Status in crash source package in Xenial: Won't Fix Status in crash source package in Artful: Won't Fix Status in crash source package in Bionic: In Progress Status in crash source package in Cosmic: Fix Released Bug description: [Impact] Some analysis won't be possible on new kernels (hwe-edge on xenial, for example; or the standard bionic kernel). [Test Case] The ipcs command has been run after the fix was applied to crash, on a live amd64 system, with success. [Regression Potential] Analysis of crashed kernels will require that the crash file be moved to a system where crash doesn't have the regression. The patch, however, should touch only the broken command, and has been tested. --------------------------------- == Comment: #0 - PAVITHRA R. PRAKASH <> - 2018-03-29 01:14:47 == ---Problem Description--- Ubuntu 18.04: "ipcs" command fails with error "invalid structure member offset" in crash prompt. ---Environment-- System Name : ltc-briggs2 Model/Type : P8 Platform : BML ---Uname output--- root@ltc-briggs2:~# uname -a Linux ltc-briggs2 4.15.0-13-generic #14-Ubuntu SMP Sat Mar 17 13:43:15 UTC 2018 ppc64le ppc64le ppc64le GNU/Linux ---Steps to reproduce-- 1. Configure kdump. 2. Trigger crash 3. run crash on captured dump ---Logs---- root@ltc-briggs2:~# dpkg -l|grep makedumpfile ii makedumpfile 1:1.6.3-1 ppc64el VMcore extraction tool root@ltc-briggs2:~# dpkg -l|grep crash ii apport 2.20.9-0ubuntu1 all automatically generate crash reports for debugging ii crash 7.2.1-1 ppc64el kernel debugging utility, allowing gdb like syntax ii kdump-tools 1:1.6.3-1 ppc64el scripts and tools for automating kdump (Linux crash dumps) ii python3-apport 2.20.9-0ubuntu1 all Python 3 library for Apport crash report handling root@ltc-briggs2:~# dpkg -l|grep kexec ii kexec-tools 1:2.0.16-1ubuntu1 ppc64el tools to support fast kexec reboots root@ltc-briggs2:~# .0-13-generic dump.201803272257 03272257# crash /usr/lib/debug/boot/vmlinux-4.15. crash 7.2.1 Copyright (C) 2002-2017 Red Hat, Inc. 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This GDB was configured as "powerpc64le-unknown-linux-gnu"... KERNEL: /usr/lib/debug/boot/vmlinux-4.15.0-13-generic DUMPFILE: dump.201803272257 [PARTIAL DUMP] CPUS: 160 DATE: Tue Mar 27 22:56:58 2018 UPTIME: 00:04:07 LOAD AVERAGE: 1.06, 0.53, 0.20 TASKS: 1734 NODENAME: ltc-briggs2 RELEASE: 4.15.0-13-generic VERSION: #14-Ubuntu SMP Sat Mar 17 13:43:15 UTC 2018 MACHINE: ppc64le (2926 Mhz) MEMORY: 512 GB PANIC: "sysrq: SysRq : Trigger a crash" PID: 7420 COMMAND: "bash" TASK: c000003e56c7c600 [THREAD_INFO: c000003e56cb0000] CPU: 41 STATE: TASK_RUNNING (SYSRQ) crash> ? * files mach repeat timer alias foreach mod runq tree ascii fuser mount search union bt gdb net set vm btop help p sig vtop dev ipcs ps struct waitq dis irq pte swap whatis eval kmem ptob sym wr exit list ptov sys q extend log rd task crash version: 7.2.1 gdb version: 7.6 For help on any command above, enter "help <command>". For help on input options, enter "help input". For help on output options, enter "help output". crash> ipcs SHMID_KERNEL KEY SHMID UID PERMS BYTES NATTCH STATUS ipcs: invalid structure member offset: idr_top FILE: ipcs.c LINE: 628 FUNCTION: idr_find() [/usr/bin/crash] error trace: 70374748930 => 703747482d8 => 703746e8e98 => 703745b1488 ipcs: invalid structure member offset: idr_top FILE: ipcs.c LINE: 628 FUNCTION: idr_find() crash> q == Comment: #3 - PAVITHRA R. PRAKASH <> - 2018-04-09 00:36:52 == (In reply to comment #1) > Hi Pavithra, > > Have you checked in older kernel versions, whether "ipcs" command > was working ...I think, it is because there were too many changes > to kernel's IPC code over several kernel versions..possibly crash tool > don't have the updated changes w.r.t new kernel IPC code > > also please check if following "options" are not working: > >>> > char *help_ipcs[] = { > "ipcs", > "System V IPC facilities", > "[-smMq] [-n pid|task] [id | addr]", > > " This command provides information on the System V IPC facilities. With > no", > " arguments, the command will display kernel usage of all three > factilities.", > " ", > " -s show semaphore arrays.", > " -m show shared memory segments.", > " -M show shared memory segments with additional details.", > " -q show message queues.", > " id show the data associated with this resource ID.", > " addr show the data associated with this virtual address of a", > " shmid_kernel, sem_array or msq_queue.", > "", > " For kernels supporting namespaces, the -n option may be used to", > " display the IPC facilities with respect to the namespace of a", > " specified task:\n", > " -n pid a process PID.", > " -n task a hexadecimal task_struct pointer.", > >>> > > Thanks!! Issue is observed even with old kernel. KERNEL: /usr/lib/debug/boot/vmlinux-4.15.0-12-generic DUMPFILE: dump.201804090031 [PARTIAL DUMP] CPUS: 160 DATE: Mon Apr 9 00:30:53 2018 UPTIME: 00:04:24 LOAD AVERAGE: 2.75, 1.56, 0.64 TASKS: 1738 NODENAME: ltc-briggs2 RELEASE: 4.15.0-12-generic VERSION: #13-Ubuntu SMP Wed Mar 7 21:37:03 UTC 2018 MACHINE: ppc64le (2926 Mhz) MEMORY: 512 GB PANIC: "sysrq: SysRq : Trigger a crash" PID: 6995 COMMAND: "bash" TASK: c000003f70dcfd00 [THREAD_INFO: c000003f70e78000] CPU: 64 STATE: TASK_RUNNING (SYSRQ) crash> ipcs SHMID_KERNEL KEY SHMID UID PERMS BYTES NATTCH STATUS ipcs: invalid structure member offset: idr_top FILE: ipcs.c LINE: 628 FUNCTION: idr_find() [/usr/bin/crash] error trace: 198c7e38930 => 198c7e382d8 => 198c7dd8e98 => 198c7ca1488 ipcs: invalid structure member offset: idr_top FILE: ipcs.c LINE: 628 FUNCTION: idr_find() crash> --------------------------------------------------------------------------------------------------------------------------------- crash> ipcs SHMID_KERNEL KEY SHMID UID PERMS BYTES NATTCH STATUS ipcs: invalid structure member offset: idr_top FILE: ipcs.c LINE: 628 FUNCTION: idr_find() [/usr/bin/crash] error trace: 69b16c28930 => 69b16c282d8 => 69b16bc8e98 => 69b16a91488 ipcs: invalid structure member offset: idr_top FILE: ipcs.c LINE: 628 FUNCTION: idr_find() crash> ipcs -s SEM_ARRAY KEY SEMID UID PERMS NSEMS ipcs: invalid structure member offset: idr_top FILE: ipcs.c LINE: 628 FUNCTION: idr_find() [/usr/bin/crash] error trace: 69b16c2ace0 => 69b16c282d8 => 69b16bc8e98 => 69b16a91488 ipcs: invalid structure member offset: idr_top FILE: ipcs.c LINE: 628 FUNCTION: idr_find() crash> ipcs -m SHMID_KERNEL KEY SHMID UID PERMS BYTES NATTCH STATUS ipcs: invalid structure member offset: idr_top FILE: ipcs.c LINE: 628 FUNCTION: idr_find() [/usr/bin/crash] error trace: 69b16c28930 => 69b16c282d8 => 69b16bc8e98 => 69b16a91488 ipcs: invalid structure member offset: idr_top FILE: ipcs.c LINE: 628 FUNCTION: idr_find() crash> ipcs -M ipcs: invalid structure member offset: idr_top FILE: ipcs.c LINE: 628 FUNCTION: idr_find() [/usr/bin/crash] error trace: 69b16c28930 => 69b16c282d8 => 69b16bc8e98 => 69b16a91488 ipcs: invalid structure member offset: idr_top FILE: ipcs.c LINE: 628 FUNCTION: idr_find() crash> ipcs -q MSG_QUEUE KEY MSQID UID PERMS USED-BYTES MESSAGES (none allocated) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1765660/+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
