[apparmor] Apache mod_apparmor problem

azurIt azurit at pobox.sk
Wed Aug 7 18:01:06 UTC 2013


>On 08/07/2013 05:29 AM, azurIt wrote:
>> Hi,
>> 
>> i'm trying to use mod_apparmor in Apache but every request is creating new profile inside kernel, which looks like this:
>>    /usr/lib/apache2/mpm-itk/apache2//DEFAULT_URI//null-1001
>>    /usr/lib/apache2/mpm-itk/apache2//DEFAULT_URI//null-1003
>>    /usr/lib/apache2/mpm-itk/apache2//DEFAULT_URI//null-1005
>>    /usr/lib/apache2/mpm-itk/apache2//DEFAULT_URI//null-1007
>>    /usr/lib/apache2/mpm-itk/apache2//DEFAULT_URI//null-1009
>> 
>> and so on. There are TONS of such profile after few weeks of running:
>> 42775 profiles are in complain mode.
>> 
>> Am I doing something wrong?
>> 
>your profile is in complain mode and it is not finding the requested
>hat on its first attempt.
>
>Basically complain mode in apparmor is a learning mode instead of
>rejecting requests that don't have permission it logs but allows
>them (complains). Domain transitions are special in that when the
>requested domain doesn't exist it could be because it needs to
>be created yet, or it could be that the request needs to be
>merged into the current profile. So apparmor creates a new null-XXX
>profile that is used to track this request.
>
>These request profiles are piling up because there is a bug where
>null-XXX profiles are not being garbage collected when no longer
>in use.
>
>Change the profile into enforce mode, using the aa-enforce tool
>on the file your apache profile is in (likely)
>
>  aa-enforce /etc/apparmor.d/usr.lib.apache2.mpm-itk.appache2
>
>or by manually adjusting be either deleting the symlink (if it
>exists) to the profile file in
>  /etc/apparmor.d/complain
>
>or by  either manually editing the profile to removing the complain
>flag, eg.
>
>  /usr/lib/apache2/mpm-itk/appache2 (complain) {...}
>
>would become
> /usr/lib/apache2/mpm-itk/appache2 {...}



Cool, thank you for info :)

azur



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