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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <3961.1250777043@redhat.com>
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>
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/