[Bug 829980] Re: upstart-udev-bridge eats 100% cpu calling dbus_message_iter_append_basic()

[James Hunt]

The attached test job config file logs the first 10 "power_supply-
device-added" events emitted to /run/initramfs/bug-829980.log. To use
it:

1) sudo stop upstart-udev-bridge
2) Plonk the attached bug-829980.conf into /etc/init/.
3) Reboot with the battery attached.

If /run/initramfs/bug-829980.log contains >1 entry, the bug is with udev
or the kernel. If the file is not generated, please look at
/var/log/udev to see if the udev "power_supply" event was emitted:

awk 'BEGIN{RS="";ORS="\n\n"}; /ACTION=add/ && /SUBSYSTEM=power_supply/ {
print; }' /var/log/udev

** Attachment added: "bug-829980.conf"
   https://bugs.launchpad.net/ubuntu/+source/upstart/+bug/829980/+attachment/2463321/+files/bug-829980.conf

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https://bugs.launchpad.net/bugs/829980

Title:
  upstart-udev-bridge eats 100% cpu calling
  dbus_message_iter_append_basic()

Status in “linux” package in Ubuntu:
  Incomplete
Status in “upstart” package in Ubuntu:
  Confirmed

Bug description:
  the segv was created by me sending a kill -11. but the 100% cpu is
  unbarable

  ProblemType: Crash
  DistroRelease: Ubuntu 11.10
  Package: upstart 1.3-0ubuntu6
  ProcVersionSignature: Ubuntu 3.0.0-8.11-generic 3.0.1
  Uname: Linux 3.0.0-8-generic x86_64
  NonfreeKernelModules: fglrx
  Architecture: amd64
  Date: Sat Aug 20 11:48:34 2011
  ExecutablePath: /sbin/upstart-udev-bridge
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Alpha amd64+mac (20110803.1)
  ProcCmdline: upstart-udev-bridge --daemon
  ProcEnviron: PATH=(custom, no user)
  Signal: 11
  SourcePackage: upstart
  StacktraceTop:
   ?? () from /lib/x86_64-linux-gnu/libc.so.6
   ?? () from /lib/x86_64-linux-gnu/libdbus-1.so.3
   ?? () from /lib/x86_64-linux-gnu/libdbus-1.so.3
   dbus_message_iter_append_basic () from /lib/x86_64-linux-gnu/libdbus-1.so.3
   ?? ()
  Title: upstart-udev-bridge crashed with SIGSEGV in dbus_message_iter_append_basic()
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:

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