Re: [resend][PATCH 1/3] mqueue: revert bump up DFLT_*MAX

[KOSAKI Motohiro]

(12/9/11 5:35 PM), kosaki.motohiro@xxxxxxxxx wrote:
> From: KOSAKI Motohiro<kosaki.motohiro@xxxxxxxxxxxxxx>
> 
> 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@xxxxxxxxxxxxxx>
> Acked-by: Doug Ledford<dledford@xxxxxxxxxx>
> Acked-by: Joe Korty<joe.korty@xxxxxxxx>
> Cc: Amerigo Wang<amwang@xxxxxxxxxx>
> Cc: Serge E. Hallyn<serue@xxxxxxxxxx>
> Cc: Jiri Slaby<jslaby@xxxxxxx>

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

Thanks.


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