public inbox for linux-kernel@vger.kernel.org
 help / color / mirror / Atom feed
From: KOSAKI Motohiro <kosaki.motohiro@gmail.com>
To: linux-kernel@vger.kernel.org
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
Date: Sun, 18 Dec 2011 13:29:41 -0500	[thread overview]
Message-ID: <4EEE3115.80801@gmail.com> (raw)
In-Reply-To: <1323470163-8723-1-git-send-email-kosaki.motohiro@gmail.com>

(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.



  parent reply	other threads:[~2011-12-18 18:29 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 ` KOSAKI Motohiro [this message]
2011-12-18 18:29 ` [resend][PATCH 1/3] mqueue: revert bump up DFLT_*MAX KOSAKI Motohiro
2011-12-18 18:38   ` Andrew Morton
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

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=4EEE3115.80801@gmail.com \
    --to=kosaki.motohiro@gmail.com \
    --cc=akpm@linux-foundation.org \
    --cc=amwang@redhat.com \
    --cc=dhowells@redhat.com \
    --cc=dledford@redhat.com \
    --cc=ebiederm@xmission.com \
    --cc=joe.korty@ccur.com \
    --cc=jslaby@suse.cz \
    --cc=kosaki.motohiro@jp.fujitsu.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=serue@us.ibm.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox