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

[James Hunt]

I've written a basic script that runs a set of random plymouth commands
"post-boot". I am still unable to recreate the SIGSEGV crash on all my
hardware, but it would be interesting to see if those who are
experiencing the problem can run this script to generate a crash. If
you're willing...

1. Download script:

    cd /tmp && wget
http://people.canonical.com/~jhunt/plymouth/test_plymouth.sh

2. Make it executable:

    chmod 755 test_plymouth.sh

3. Install required package:

    sudo apt-get install plymouth-x11

4. Run 2 instances of script

4a) In one terminal:

      sudo /tmp/test_plymouth.sh --server

4b) In another terminal:

    sudo /tmp/test_plymouth.sh --client --max 2048

Unfortunately, you *might* find that the server instance of the script
will exit with a "Too many open files" message. This issue as been
reported with plymouth upstream. To work around this, before running the
server instance of the script

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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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