[Bug 1226356] Re: explicit deny rules do not silence logging denials in dbus and mount rules

[Tyler Hicks]

On 2013-10-06 01:46:09, Jagat wrote:
> I have similar logs in my syslog

Hello - Thanks for the comment. These denials are unrelated to this bug
but I'll point you to their bug numbers below.

> And then my machine freezes which i have to hard boot

In my opinion, a machine freeze is not likely to be caused by these
AppArmor denials. Either way, we'll get the denials fixed and then maybe
you'll know if they were the cause.

> Oct  6 12:13:06 nanak-P570WM dbus[2955]: apparmor="DENIED"
> operation="dbus_method_call"  bus="session" name="org.freedesktop.DBus"
> path="/org/freedesktop/DBus" interface="org.freedesktop.DBus"
> member="Hello" mask="send" pid=5332 profile="/usr/bin/evince-
> thumbnailer" peer_profile="unconfined"

I've created bug #1236082 for this denial

> Oct  6 12:13:16 nanak-P570WM dbus[3014]: apparmor="DENIED"
> operation="dbus_method_call"  bus="accessibility"
> name="org.freedesktop.DBus" path="/org/freedesktop/DBus"
> interface="org.freedesktop.DBus" member="Hello" mask="send" pid=5391
> profile="/usr/bin/evince" peer_profile="unconfined"

See bug #1226141 for this denial

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https://bugs.launchpad.net/bugs/1226356

Title:
  explicit deny rules do not silence logging denials in dbus and mount
  rules

Status in “apparmor” package in Ubuntu:
  In Progress
Status in “dbus” package in Ubuntu:
  In Progress
Status in “apparmor” source package in Saucy:
  In Progress
Status in “dbus” source package in Saucy:
  In Progress

Bug description:
  I have this rule in my profile:
    # We want to explicitly deny access to NetworkManager
    deny dbus (send)
         bus=system
         path=/org/freedesktop/NetworkManager,

  but with this rule, I still see these denials:
  Sep 17 01:03:02 ubuntu-phablet dbus[622]: apparmor="DENIED" operation="dbus_method_call"  bus="system" name="org.freedesktop.NetworkManager" path="/org/freedesktop/NetworkManager" interface="org.freedesktop.DBus.Introspectable" member="Introspect" mask="send" pid=3201 profile="net.launchpad.ubuntu-security.ubuntu-sdk-1310-api-demos_ubuntu-sdk-1310-api-demos_0.1" peer_pid=1154 peer_profile="unconfined"
  Sep 17 01:03:02 ubuntu-phablet dbus[622]: apparmor="DENIED" operation="dbus_method_call"  bus="system" name="org.freedesktop.NetworkManager" path="/org/freedesktop/NetworkManager" interface="org.freedesktop.NetworkManager" member="GetDevices" mask="send" pid=3201 profile="net.launchpad.ubuntu-security.ubuntu-sdk-1310-api-demos_ubuntu-sdk-1310-api-demos_0.1" peer_pid=1154 peer_profile="unconfined"

  Another one is this deny rule:
     deny dbus send bus=session
               interface="org.gnome.GConf.Server",

  with these denials:
  Sep 16 17:37:58 localhost dbus[16510]: apparmor="DENIED" operation="dbus_method_call"  bus="session" name="org.gnome.GConf" path="/org/gnome/GConf/Server" interface="org.gnome.GConf.Server" member="GetDefaultDatabase" mask="send" pid=15037 profile="net.launchpad.ubuntu-security.ubuntu-sdk-1310-api-demos_ubuntu-sdk-1310-api-demos_0.1" peer_pid=16736 peer_profile="unconfined"

  While this isn't a 'high' priority because the accesses are still
  being denied, it is a bug and the lack of silencing may cause
  confusion for users.

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