Re: SELinux policy reload cannot be sent to audit system

[Laurent Bigonville <bigon@debian.org>]

Le 06/11/15 00:03, Steve Grubb a écrit :
> On Thursday, November 05, 2015 09:32:09 AM Laurent Bigonville wrote:
>> Le 05/11/15 04:23, Steve Grubb a écrit :
>>> On Tuesday, November 03, 2015 09:48:31 PM Laurent Bigonville wrote:
>>>> Le 03/11/15 21:08, Richard Guy Briggs a écrit :
>>>>> On 15/11/03, Steve Grubb wrote:
>>>>>> On Tuesday, November 03, 2015 06:12:07 PM Laurent Bigonville wrote:
>>>>>>> I'm running in permissive mode.
>>>>>>>
>>>>>>> I'm seeing a netlink open to the audit:
>>>>>>>
>>>>>>> dbus-daem 1057 messagebus    7u  netlink 0t0  15248 AUDIT
>>>>>>>
>>>>>>> Apparently audit_send() returns -1
>>>>>> Since its -1, that would be an EPERM. No idea where this is coming from
>>>>>> if you have CAP_AUDIT_WRITE. I use pscap to check that.
>>>>> Are you in a container of any kind or any non-init USER namespace?  I
>>>>> can't see it being denied otherwise assuming it is only trying to send
>>>>> AUDIT_USER_* class messages.  (This assumes upstream kernel.)
>>>> No, I initially saw this on my laptop and then tested on F23 in kvm.
>>> I tested this on Fedora 22 and did not get a USER_AVC from dbus, but I
>>> also
>>> did not get an error message in syslog. So, I don't know what to make of
>>> it. (And for the record, I have a bz open saying that USER_AVC is the
>>> wrong event type. They are blaming libselinux but I blame them for not
>>> using
>>> AUDIT_USER_MAC_POLICY_LOAD.)
>> The audit code in dbus has been refactored a bit in the version present
>> F23 and debian unstable, so it might be related to this that.
>
> I filed a bz to get this fixed:
> https://bugzilla.redhat.com/show_bug.cgi?id=1278602
>
> The root cause is listed in the bug. Dbus has 2 threads, one with
> CAP_AUDIT_WRITE and one without. The one without is the one trying to send the
> event.
Thanks,

I've opened a bug upstream too: 
https://bugs.freedesktop.org/show_bug.cgi?id=92832