linux-kernel - Re: [PATCH v2] bsdacct: switch credentials for writing to the accounting file

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Date:	Thu, 20 Aug 2009 15:04:03 +0100
From:	David Howells <dhowells@...hat.com>
To:	Michal Schmidt <mschmidt@...hat.com>
Cc:	dhowells@...hat.com, linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH v2] bsdacct: switch credentials for writing to the accounting file

Michal Schmidt <mschmidt@...hat.com> wrote:

> When process accounting is enabled, every exiting process writes a log
> to the account file. In addition, every once in a while one of the
> exiting processes checks whether there's enough free space for the log.
> 
> SELinux policy may or may not allow the exiting process to stat the fs.
> So unsuspecting processes start generating AVC denials just because
> someone enabled process accounting.
> 
> For these filesystem operations, the exiting process's credentials
> should be temporarily switched to that of the process which enabled
> accounting, because it's really that process who wanted to have the
> accounting information logged.
> 
> Signed-off-by: Michal Schmidt <mschmidt@...hat.com>

Acked-by: David Howells <dhowells@...hat.com>
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