linux-kernel - Re: [resend][PATCH 1/3] mqueue: revert bump up DFLT

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Date:	Sun, 18 Dec 2011 13:29:41 -0500
From:	KOSAKI Motohiro <kosaki.motohiro@...il.com>
To:	linux-kernel@...r.kernel.org
CC:	akpm@...ux-foundation.org,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Amerigo Wang <amwang@...hat.com>,
	"Serge E. Hallyn" <serue@...ibm.com>, Jiri Slaby <jslaby@...e.cz>,
	"Doug Ledford (commit_signer:5/9=56%)" <dledford@...hat.com>,
	"\"Eric W. Biederman\" (commit_signer:2/9=22%)" 
	<ebiederm@...ssion.com>,
	"Joe Korty (commit_signer:2/9=22%)" <joe.korty@...r.com>,
	"David Howells (commit_signer:2/9=22%)" <dhowells@...hat.com>
Subject: Re: [resend][PATCH 1/3] mqueue: revert bump up DFLT_*MAX

(12/9/11 5:35 PM), kosaki.motohiro@...il.com wrote:
> From: KOSAKI Motohiro<kosaki.motohiro@...fujitsu.com>
> 
> Mqueue limitation is slightly naieve parameter likes other ipcs
> because unprivileged user can consume kernel memory by using ipcs.
> 
> Thus, too aggressive raise bring us security issue. Example,
> current setting allow evil unprivileged user use 256GB (= 256
> * 1024 * 1024*1024) and it's enough large to system will belome
> unresponsive. Don't do that.
> 
> Instead, every admin should adjust the knobs for their own systems.
> 
> Signed-off-by: KOSAKI Motohiro<kosaki.motohiro@...fujitsu.com>
> Acked-by: Doug Ledford<dledford@...hat.com>
> Acked-by: Joe Korty<joe.korty@...r.com>
> Cc: Amerigo Wang<amwang@...hat.com>
> Cc: Serge E. Hallyn<serue@...ibm.com>
> Cc: Jiri Slaby<jslaby@...e.cz>

Andrew, can you please pick up this series into your tree? because your
tree have related Doug mqueue.

Thanks.


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