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[Bug 1765660] Re: Ubuntu 18.04 [ briggs ]: "ipcs" command fails with error "invalid structure member offset" in crash prompt.

 

** Changed in: ubuntu-power-systems
       Status: Fix Committed => Fix Released

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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:
  Fix Released
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:
  Fix Released
Status in crash source package in Cosmic:
  Fix Released

Bug description:
  [Impact]
  ipcs command could not be used with the bionic GA kernel on ppc64le.

  [Test Case]
  The ipcs command has been run after the fix was applied to crash, on live amd64, ppc64el and s390x system. In fact, the new upload introduces a test to verify this bug does not happen again.

  [Regression Potential]
  We have only introduced the fix for this specific bug, also adding a test for it. It's less likely to be more broken than the current version on the release as an entire new upstream version could be.

  ---------------------------------

  == 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.
  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 "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)

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