[Bug 849414] Re: plymouthd crashed with SIGSEGV in ply_event_loop_process_pending_events()

[Steve Langasek]

On Tue, Oct 11, 2011 at 03:00:27PM -0000, James Hunt wrote:
> Hi Luke - my disassembly simply pointed to the source line that caused
> the crash. However, we still don't know why the "source" object is NULL
> (it should never be apparently). What we really need is a full core dump
> to analyze

Given that this appears to be memory corruption, what we really need is
enough information to *reproduce* the problem as a core dump is likely to
only show that memory has been corrupted without giving us any hints to why.

If someone is able to reproduce this at will and wants to try running
plymouth under valgrind for us, that could be helpful.

-- 
Steve Langasek                   Give me a lever long enough and a Free OS
Debian Developer                   to set it on, and I can move the world.
Ubuntu Developer                                    http://www.debian.org/
slangasek at ubuntu.com                                     vorlon at debian.org

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https://bugs.launchpad.net/bugs/849414

Title:
  plymouthd crashed with SIGSEGV in
  ply_event_loop_process_pending_events()

Status in “plymouth” package in Ubuntu:
  Incomplete
Status in “plymouth” source package in Oneiric:
  Incomplete
Status in “plymouth” source package in Precise:
  Incomplete

Bug description:
  System did not crash. Bug reporter popped up, so I am reporting. Other
  reports were for 10.04, not 11.10 beta. hope this helps.

  ProblemType: Crash
  DistroRelease: Ubuntu 11.10
  Package: plymouth 0.8.2-2ubuntu25
  ProcVersionSignature: Ubuntu 3.0.0-11.17-generic 3.0.4
  Uname: Linux 3.0.0-11-generic i686
  ApportVersion: 1.22.1-0ubuntu2
  Architecture: i386
  Date: Tue Sep 13 16:35:33 2011
  DefaultPlymouth: /lib/plymouth/themes/ubuntu-logo/ubuntu-logo.plymouth
  ExecutablePath: /sbin/plymouthd
  InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
  Lsusb:
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
   Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
   Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
   Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
  MachineType: Dell Inc. Latitude D610
  PccardctlIdent:
   Socket 0:
     no product info available
  PccardctlStatus:
   Socket 0:
     no card
  ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-11-generic root=UUID=53aeeb3c-456d-40c6-888f-68577cebacd4 ro quiet splash vt.handoff=7
  ProcCmdline: /sbin/plymouthd --mode=boot --attach-to-session
  ProcEnviron: PATH=(custom, no user)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-11-generic root=UUID=53aeeb3c-456d-40c6-888f-68577cebacd4 ro quiet splash vt.handoff=7
  SegvAnalysis:
   Segfault happened at: 0x5ce5b7 <ply_event_loop_process_pending_events+455>:	test   %ecx,0x4(%esi)
   PC (0x005ce5b7) ok
   source "%ecx" ok
   destination "0x4(%esi)" (0x00000004) not located in a known VMA region (needed writable region)!
  SegvReason: writing NULL VMA
  Signal: 11
  SourcePackage: plymouth
  StacktraceTop:
   ply_event_loop_process_pending_events () from /lib/libply.so.2
   ply_event_loop_run () from /lib/libply.so.2
   ?? ()
   __libc_start_main () from /lib/i386-linux-gnu/libc.so.6
   ?? ()
  TextPlymouth: /lib/plymouth/themes/ubuntu-text/ubuntu-text.plymouth
  Title: plymouthd crashed with SIGSEGV in ply_event_loop_process_pending_events()
  UpgradeStatus: Upgraded to oneiric on 2011-09-05 (7 days ago)
  UserGroups:
   
  dmi.bios.date: 10/02/2005
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A06
  dmi.board.name: 0U8082
  dmi.board.vendor: Dell Inc.
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA06:bd10/02/2005:svnDellInc.:pnLatitudeD610:pvr:rvnDellInc.:rn0U8082:rvr:cvnDellInc.:ct8:cvr:
  dmi.product.name: Latitude D610
  dmi.sys.vendor: Dell Inc.

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