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[Bug 453335] Re: apparmor complains about write access to a readonly file

To: kernel-packages@xxxxxxxxxxxxxxxxxxx
From: NightShade <453335@xxxxxxxxxxxxxxxxxx>
Date: Tue, 06 Jan 2015 23:52:55 -0000
Reply-to: Bug 453335 <453335@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

Correction the bug number for the other bug is #1004606

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https://bugs.launchpad.net/bugs/453335

Title:
  apparmor complains about write access to a readonly file

Status in libvirt package in Ubuntu:
  Fix Released
Status in linux package in Ubuntu:
  Fix Released
Status in libvirt source package in Lucid:
  Fix Released
Status in linux source package in Lucid:
  Fix Released
Status in libvirt source package in Karmic:
  Fix Released
Status in linux source package in Karmic:
  Fix Released

Bug description:
  When doing libvirt/apparmor ISO testing, I noticed that if I try to create a VM via an ISO image, I get the following apparmor denied message:
  type=APPARMOR_DENIED msg=audit(1255714703.311:56): operation="open" pid=31330 parent=1 profile="libvirt-7e7f916e-ff5a-c997-e9f6-c379793fd5be" requested_mask="::rw" denied_mask="::w" fsuid=0 ouid=1000 name="/home/jamie/vms/isos/karmic/karmic-desktop-i386.iso"

  What is happening is that libvirt is for some reason trying to write to this file, but it shouldn't. virt-manager shows this device as readonly and the XML for the VM shows it too:
      <disk type='file' device='cdrom'>
        <source file='/home/jamie/vms/isos/karmic/karmic-desktop-i386.iso'/>
        <target dev='hdc' bus='ide'/>
        <readonly/>
      </disk>

  The installation proceeds just fine and this isn't a regression, but
  libvirt should not try to write to installation media like this.  I
  encountered this when installing via virt-manager using the following:
  local ISO, os type: generic/generic, kvm/i686, 512, 1 vcpu, 8GB disk,
  don't allocate now

  ProblemType: Bug
  Architecture: amd64
  Date: Fri Oct 16 12:47:32 2009
  DistroRelease: Ubuntu 9.10
  Package: libvirt-bin 0.7.0-1ubuntu11
  ProcEnviron:
   PATH=(custom, user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcVersionSignature: Ubuntu 2.6.31-14.47-generic
  SourcePackage: libvirt
  Uname: Linux 2.6.31-14-generic x86_64

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