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Date: Sun, 18 Dec 2011 13:29:41 -0500
From: KOSAKI Motohiro <kosaki.motohiro@gmail.com>
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CC: akpm@linux-foundation.org,
        KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
        Amerigo Wang <amwang@redhat.com>, "Serge E. Hallyn" <serue@us.ibm.com>,
        Jiri Slaby <jslaby@suse.cz>,
        "Doug Ledford (commit_signer:5/9=56%)" <dledford@redhat.com>,
        "\"Eric W. Biederman\" (commit_signer:2/9=22%)" 
	<ebiederm@xmission.com>,
        "Joe Korty (commit_signer:2/9=22%)" <joe.korty@ccur.com>,
        "David Howells (commit_signer:2/9=22%)" <dhowells@redhat.com>
Subject: Re: [resend][PATCH 1/3] mqueue: revert bump up DFLT_*MAX
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(12/9/11 5:35 PM), kosaki.motohiro@gmail.com wrote:
> From: KOSAKI Motohiro<kosaki.motohiro@jp.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@jp.fujitsu.com>
> Acked-by: Doug Ledford<dledford@redhat.com>
> Acked-by: Joe Korty<joe.korty@ccur.com>
> Cc: Amerigo Wang<amwang@redhat.com>
> Cc: Serge E. Hallyn<serue@us.ibm.com>
> Cc: Jiri Slaby<jslaby@suse.cz>

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

Thanks.