[Bug 1745714] Re: plymouthd crashed with SIGSEGV in script_obj_deref_direct()

[Apport retracing service]

*** This bug is a duplicate of bug 927636 ***
    https://bugs.launchpad.net/bugs/927636

Thank you for taking the time to report this crash and helping to make
this software better.  This particular crash has already been reported
and is a duplicate of bug #927636, so is being marked as such.  Please
look at the other bug report to see if there is any missing information
that you can provide, or to see if there is a workaround for the bug.
Additionally, any further discussion regarding the bug should occur in
the other report.  Please continue to report any other bugs you may
find.

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** This bug has been marked a duplicate of bug 927636
   plymouthd crashed with SIGSEGV in script_obj_deref_direct()

** Information type changed from Private to Public

** Tags removed: need-amd64-retrace

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https://bugs.launchpad.net/bugs/1745714

Title:
  plymouthd crashed with SIGSEGV in script_obj_deref_direct()

Status in plymouth package in Ubuntu:
  New

Bug description:
  Got this directly after restart after installing updates 2018-01-27.
  Answered a question about Grub with "keep the installed customized version".

  ProblemType: Crash
  DistroRelease: Ubuntu 18.04
  Package: plymouth 0.9.3-1ubuntu1
  Uname: Linux 4.15.0-041500rc7-generic x86_64
  ApportVersion: 2.20.8-0ubuntu6
  Architecture: amd64
  Date: Wed Jan 24 21:13:40 2018
  DefaultPlymouth: /usr/share/plymouth/themes/ubuntu-logo/ubuntu-logo.plymouth
  ExecutablePath: /sbin/plymouthd
  InstallationDate: Installed on 2017-09-15 (133 days ago)
  InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Alpha amd64 (20170915)
  MachineType: Micro-Star International Co., Ltd. MS-7A34
  ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-041500rc7-generic root=UUID=527726c6-7d7b-4747-a720-5516b68ae81a ro amdgpu.dc=1 quiet splash vt.handoff=1
  ProcCmdline: @sbin/plymouthd --mode=boot --pid-file=/run/plymouth/pid --attach-to-session
  ProcFB: 0 amdgpudrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-041500rc7-generic root=UUID=527726c6-7d7b-4747-a720-5516b68ae81a ro amdgpu.dc=1 quiet splash vt.handoff=1
  SegvAnalysis:
   Segfault happened at: 0x7efda0cd0494 <script_obj_deref_direct+20>:	cmpl   $0x1,(%rax)
   PC (0x7efda0cd0494) ok
   source "$0x1" ok
   destination "(%rax)" (0x001be6ea) not located in a known VMA region (needed writable region)!
  SegvReason: writing unknown VMA
  Signal: 11
  SourcePackage: plymouth
  StacktraceTop:
   script_obj_deref_direct () from /usr/lib/x86_64-linux-gnu/plymouth/script.so
   script_obj_as_custom () from /usr/lib/x86_64-linux-gnu/plymouth/script.so
   script_execute_object () from /usr/lib/x86_64-linux-gnu/plymouth/script.so
   script_lib_plymouth_on_update_status () from /usr/lib/x86_64-linux-gnu/plymouth/script.so
   ?? ()
  TextPlymouth: /usr/share/plymouth/themes/ubuntu-text/ubuntu-text.plymouth
  Title: plymouthd crashed with SIGSEGV in script_obj_deref_direct()
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:
   
  dmi.bios.date: 09/19/2017
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 1.90
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: B350 TOMAHAWK (MS-7A34)
  dmi.board.vendor: Micro-Star International Co., Ltd.
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: To be filled by O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: Micro-Star International Co., Ltd.
  dmi.chassis.version: 1.0
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1.90:bd09/19/2017:svnMicro-StarInternationalCo.,Ltd.:pnMS-7A34:pvr1.0:rvnMicro-StarInternationalCo.,Ltd.:rnB350TOMAHAWK(MS-7A34):rvr1.0:cvnMicro-StarInternationalCo.,Ltd.:ct3:cvr1.0:
  dmi.product.family: To be filled by O.E.M.
  dmi.product.name: MS-7A34
  dmi.product.version: 1.0
  dmi.sys.vendor: Micro-Star International Co., Ltd.

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