linux-kernel - Re: different capability from different namespace required for prctl_set_mm_exe

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Message-ID: <20180925185440.GJ15710@uranus>
Date:   Tue, 25 Sep 2018 21:54:40 +0300
From:   Cyrill Gorcunov <gorcunov@...il.com>
To:     Greg KH <gregkh@...uxfoundation.org>
Cc:     Tong Zhang <ztong@...edu>, tglx@...utronix.de,
        akpm@...ux-foundation.org, linux@...inikbrodowski.net,
        ebiederm@...ssion.com, keescook@...omium.org, Dave.Martin@....com,
        wolffhardt.schwabe@....de, yang.shi@...ux.alibaba.com,
        linux-kernel@...r.kernel.org, wenbo.s@...sung.com
Subject: Re: different capability from different namespace required for
 prctl_set_mm_exe_file

On Tue, Sep 25, 2018 at 08:40:54PM +0200, Greg KH wrote:
> > 
> > It is done this way on purpose. The prctl_set_mm_map is a complex call
> > which carries a bunch of parameters and allowed if you're inside user-ns admin,
> > in turn prctl_set_mm allows to modify settings one by one. So no, it is not
> > an error but rather call specifics.
> 
> I was hoping that when the submitter went to create such a patch, they
> would have realized that. You learn more when trying to fix a problem
> than when someone has to tell you the answers :)

True :) Next time I'll wait a couple of days.