From: Andrew Morton <akpm@linux-foundation.org>
To: KOSAKI Motohiro <kosaki.motohiro@gmail.com>
Cc: linux-kernel@vger.kernel.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
Date: Sun, 18 Dec 2011 10:38:36 -0800 [thread overview]
Message-ID: <20111218103836.258eedb8.akpm@linux-foundation.org> (raw)
In-Reply-To: <4EEE3124.7070605@gmail.com>
On Sun, 18 Dec 2011 13:29:56 -0500 KOSAKI Motohiro <kosaki.motohiro@gmail.com> wrote:
> (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 patch series.
Soon. I need to go back and read the email trail regarding Doug's patches.
next prev parent reply other threads:[~2011-12-18 18:35 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-09 22:35 [resend][PATCH 1/3] mqueue: revert bump up DFLT_*MAX kosaki.motohiro
2011-12-09 22:35 ` [resend][PATCH 2/3] mqueue: don't use kmalloc with KMALLOC_MAX_SIZE kosaki.motohiro
2011-12-09 22:35 ` [resend][PATCH 3/3] mqueue: separate mqueue default value from maximum value kosaki.motohiro
2011-12-18 18:29 ` [resend][PATCH 1/3] mqueue: revert bump up DFLT_*MAX KOSAKI Motohiro
2011-12-18 18:29 ` KOSAKI Motohiro
2011-12-18 18:38 ` Andrew Morton [this message]
2012-03-14 21:28 ` Doug Ledford
2012-03-14 21:38 ` Andrew Morton
2012-03-14 21:45 ` Doug Ledford
2012-03-19 18:02 ` KOSAKI Motohiro
2012-03-19 18:16 ` Doug Ledford
2012-03-19 20:49 ` KOSAKI Motohiro
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