[Bug 1542000] Re: plymouthd crashed with SIGSEGV in script_obj_deref_direct()

[David Sheriff]

Serious enough on my 2 systems to fatally lock up one system repeatedly.
Two machines both running 16.04 lts.  One locks up frequently with this
error.  The other only ocassionally.  Both 64 bit AMD running on SS
drives.

Humbly request a pointer to a printable version of the error report
contents.  Now taking 4 screenshots to capture the details.

What else should I preserve that might assist in the resolution of this
bug?

I seem to also suffer from related but different bugs, most showing up
in Plymouth. I corrected a few bits of corrupted code in the past which
seemed to eliminate this class of bug for a few weeks.  All drives
report healthy  (ext4)

Most commonly occur right after sign on and the opening of G3 desktop.
Suggests possible radiation damage with SSDs Usually I tell the system
to ignore the error and it does not return that powered up session.  Do
I need to purchase better SSDs with more robust error correction?  Have
one Samsung, one kingston. At 2500 feet so a bit more radiation than sea
level.

Humbly request forebearance in the face of my ignorance. Most of my
software skills were obsolete decades back.  I no longer have enough
remaining life or intellectual power to come anywhere close to the
ability to understand this code. I would if I could.

-- 
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https://bugs.launchpad.net/bugs/1542000

Title:
  plymouthd crashed with SIGSEGV in script_obj_deref_direct()

Status in plymouth package in Ubuntu:
  Confirmed

Bug description:
  when start login screen plimuth crash and auto login don't start.
  Start login screen GDM3

  ProblemType: Crash
  DistroRelease: Ubuntu 16.04
  Package: plymouth 0.9.2-3ubuntu9
  ProcVersionSignature: Ubuntu 4.4.0-2.16-generic 4.4.0
  Uname: Linux 4.4.0-2-generic x86_64
  ApportVersion: 2.19.4-0ubuntu2
  Architecture: amd64
  Date: Thu Feb  4 20:19:23 2016
  DefaultPlymouth: /usr/share/plymouth/themes/ubuntu-gnome-logo/ubuntu-gnome-logo.plymouth
  ExecutablePath: /sbin/plymouthd
  InstallationDate: Installed on 2016-01-27 (8 days ago)
  InstallationMedia: Ubuntu-GNOME 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160126)
  MachineType: LENOVO 80EW
  ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-2-generic root=UUID=96e91037-4caa-46d6-b0b0-ecc19860fae0 ro quiet splash vt.handoff=7
  ProcCmdline: @sbin/plymouthd --mode=boot --pid-file=/run/plymouth/pid --attach-to-session
  ProcEnviron:
   LANG=it_IT.UTF-8
   PATH=(custom, no user)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-2-generic root=UUID=96e91037-4caa-46d6-b0b0-ecc19860fae0 ro quiet splash vt.handoff=7
  SegvAnalysis:
   Segfault happened at: 0x7fac854ff660 <script_obj_deref_direct>:	cmpl   $0x1,(%rdi)
   PC (0x7fac854ff660) ok
   source "$0x1" ok
   destination "(%rdi)" (0x00000000) not located in a known VMA region (needed writable region)!
  SegvReason: writing NULL 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-gnome-text/ubuntu-gnome-text.plymouth
  Title: plymouthd crashed with SIGSEGV in script_obj_deref_direct()
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:
   
  dmi.bios.date: 07/14/2015
  dmi.bios.vendor: LENOVO
  dmi.bios.version: A8CN47WW(V3.00)
  dmi.board.asset.tag: NO Asset Tag
  dmi.board.name: Lenovo B50-80
  dmi.board.vendor: LENOVO
  dmi.board.version: No DPK
  dmi.chassis.asset.tag: NO Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Lenovo B50-80
  dmi.modalias: dmi:bvnLENOVO:bvrA8CN47WW(V3.00):bd07/14/2015:svnLENOVO:pn80EW:pvrLenovoB50-80:rvnLENOVO:rnLenovoB50-80:rvrNoDPK:cvnLENOVO:ct10:cvrLenovoB50-80:
  dmi.product.name: 80EW
  dmi.product.version: Lenovo B50-80
  dmi.sys.vendor: LENOVO

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