linux-kernel - Re: [PATCH 4.10 070/111] audit: fix auditd/kernel connection state tracking

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Message-ID: <CAHC9VhTOxzcJpVSFDign56jkkruQjujTp7GQzk107FNWYTXRYg@mail.gmail.com>
Date:   Tue, 20 Feb 2018 08:25:21 -0500
From:   Paul Moore <paul@...l-moore.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        Dmitry Vyukov <dvyukov@...gle.com>, linux-audit@...hat.com
Subject: Re: [PATCH 4.10 070/111] audit: fix auditd/kernel connection state tracking

On Tue, Feb 20, 2018 at 7:37 AM, Peter Zijlstra <peterz@...radead.org> wrote:
> On Tue, Mar 28, 2017 at 02:30:56PM +0200, Greg Kroah-Hartman wrote:
>> 4.10-stable review patch.  If anyone has any objections, please let me know.
>
>> +     if (!(auditd_test_task(current) ||
>> +           (current == __mutex_owner(&audit_cmd_mutex)))) {
>> +             long stime = audit_backlog_wait_time;
>
> Since I cannot find the original email on lkml, NAK on this.
> __mutex_owner() is not a general purpose helper function.

Since this code also exists in the current kernel, I need to ask what
recommended alternatives exist for determining the mutex owner?

I imagine we could track the mutex owner separately in the audit
subsystem, but I'd much prefer to leverage an existing mechanism if
possible.

-- 
paul moore
www.paul-moore.com