kernel-packages team mailing list archive

[Brad Figg <brad.figg@xxxxxxxxxxxxx>]

This bug is missing log files that will aid in diagnosing the problem.
>From a terminal window please run:

apport-collect 1244157

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1244157

Title:
  "Failed name lookup - disconnected path" in dhclient D-BUS access

Status in “apparmor” package in Ubuntu:
  New
Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  On October 9 the NetworkManager tests started failing
  (https://jenkins.qa.ubuntu.com/view/Saucy/view/AutoPkgTest/job/saucy-
  adt-network-manager/?). Unfortunately the more recent saucy logs got
  lost, but the trusty ones have the information, like in

    https://jenkins.qa.ubuntu.com/view/Trusty/view/AutoPkgTest/job
  /trusty-adt-network-manager/1/ARCH=i386,label=adt/

  In these, dhclient that gets called through NetworkManager and
  /usr/lib/NetworkManager/nm-dhcp-client.action cannot access the system
  D-BUS any more:

  ----------- NM log ------------
  NetworkManager[24451]: <info> Activation (eth42) Stage 3 of 5 (IP Configure Start) complete.
  Internet Systems Consortium DHCP Client 4.2.4
  Copyright 2004-2012 Internet Systems Consortium.
  All rights reserved.
  For info, please visit https://www.isc.org/software/dhcp/

  Error: could not get the system bus.  Make sure the message bus daemon is running!  Message: (org.freedesktop.D
  Bus.Error.AccessDenied) Failed to connect to socket /var/run/dbus/system_bus_socket: Permission denied
  ----------- NM log ------------

  In syslog, you see this at that time:

  ------------ syslog ---------
  Oct 21 14:11:24 autopkgtest kernel: [  288.320754] type=1400 audit(1382364684.505:21): apparmor="DENIED"  operation="connect" info="Failed name lookup - disconnected path" error=-13 parent=18759 profile="/usr/lib/NetworkManager/nm-dhcp-client.action" name="run/dbus/system_bus_socket" pid=18760 comm="nm-dhcp-client." requested_mask="rw" denied_mask="rw" fsuid=0 ouid=0
  Oct 21 14:11:24 autopkgtest kernel: [  288.333814] type=1400 audit(1382364684.517:22): apparmor="DENIED" operation="sendmsg" info="Failed name lookup - disconnected path" error=-13 parent=18752 profile="/sbin/dhclient" name="dev/log" pid=18759 comm="dhclient" requested_mask="w" denied_mask="w" fsuid=0 ouid=0
  ------------ syslog ---------

  This gets fixed if I do "sudo /etc/init.d/apparmor teardown". But it
  does not seem to be a problem with the policy itself; if I do "sudo
  aa-complain dhclient" then dmesg changes to

  [ 8054.314704] type=1400 audit(1382609088.727:672): apparmor="ALLOWED" operation="sendmsg" info="Failed name lookup - disconnected path" error=-13 parent=24451 profile="/sbin/dhclient" name="dev/log" pid=24736 comm="dhclient" requested_mask="w" denied_mask="w" fsuid=0 ouid=0
  [ 8054.341409] type=1400 audit(1382609088.755:673): apparmor="ALLOWED" operation="connect" info="Failed name lookup - disconnected path" error=-13 parent=24736 profile="/usr/lib/NetworkManager/nm-dhcp-client.action" name="run/dbus/system_bus_socket" pid=24737 comm="nm-dhcp-client." requested_mask="rw" denied_mask="rw" fsuid=0 ouid=0

  So this doesn't look like a problem with the policy but rather with
  some internal AppArmor name parsing?

  I found an old bug 955892 with the same error message, but that got
  fixed a while ago, and this does not involve ecryptfs or anythign
  similar. It's just a plain trusty VM with the NetworkManager
  autopkgtest.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/apparmor/+bug/1244157/+subscriptions