linux-kernel - Re: [PATCH] Don't audit SECCOMP_KILL/RET_ERRNO when syscall auditing is disabled

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Message-ID: <CAHC9VhT1Eu_Z5xk-e3iF7nJT7QZOH1VJuvJBvB5UAZ5CV9=fVQ@mail.gmail.com>
Date:	Sun, 10 Apr 2016 18:17:53 -0400
From:	Paul Moore <paul@...l-moore.com>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	Eric Paris <eparis@...hat.com>, linux-kernel@...r.kernel.org,
	Andi Kleen <ak@...ux.intel.com>, linux-audit@...hat.com
Subject: Re: [PATCH] Don't audit SECCOMP_KILL/RET_ERRNO when syscall auditing
 is disabled

On Sat, Apr 9, 2016 at 10:41 PM, Andi Kleen <andi@...stfloor.org> wrote:
>> What kernel version are you using?  I believe we fixed that in Linux
>> 4.5 with the following:
>
> This is 4.6-rc2.
>>
>>   commit 96368701e1c89057bbf39222e965161c68a85b4b
>>   From: Paul Moore <pmoore@...hat.com>
>>   Date: Wed, 13 Jan 2016 10:18:55 -0400 (09:18 -0500)
>>
>>   audit: force seccomp event logging to honor the audit_enabled flag
>
> No you didn't fix it because audit_enabled is always enabled by systemd
> for user space auditing, see the original description of my patch.

[NOTE: adding the audit list to the CC line]

Sorry, I read your email too quickly; you are correct, that commit
fixed a different problem.

Let me think on this a bit more.  Technically I don't see this as a
bug with the kernel, userspace is enabling audit and you are getting
audit messages as a result; from my opinion this is the expected
behavior.  However, we've talked in the past about providing better
control over seccomp's auditing/logging and that work would allow you
to quiet all seccomp messages if you desired.

If you are interested, I started tracking this issue at the link below:

 * https://github.com/linux-audit/audit-kernel/issues/13

-- 
paul moore
www.paul-moore.com