linux-kernel - Re: [PATCH review 2/6] userns: Allow any uid or gid mappings that don't overlap.

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Message-ID: <20130128151244.GV17632@redhat.com>
Date:	Mon, 28 Jan 2013 10:12:44 -0500
From:	Aristeu Rozanski <aris@...hat.com>
To:	Lord Glauber Costa of Sealand <glommer@...allels.com>
Cc:	"Eric W. Biederman" <ebiederm@...ssion.com>,
	linux-fsdevel@...r.kernel.org,
	Linux Containers <containers@...ts.linux-foundation.org>,
	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH review 2/6] userns: Allow any uid or gid mappings that
 don't overlap.

On Mon, Jan 28, 2013 at 06:41:39PM +0400, Lord Glauber Costa of Sealand wrote:
> Hello Mr. Someone.
> 
> On 01/28/2013 06:28 PM, Aristeu Rozanski wrote:
> > On Fri, Jan 25, 2013 at 06:21:00PM -0800, Eric W. Biederman wrote:
> >> When I initially wrote the code for /proc/<pid>/uid_map.  I was lazy
> >> and avoided duplicate mappings by the simple expedient of ensuring the
> >> first number in a new extent was greater than any number in the
> >> previous extent.
> >>
> >> Unfortunately that precludes a number of valid mappings, and someone
> >> noticed and complained.  So use a simple check to ensure that ranges
> >> in the mapping extents don't overlap.
> > 
> > Acked-by: Someone <aris@...hat.com>
> > 
> 
> Documentation/SubmittingPatches:
> 
> "then you just add a line saying
> 
>         Signed-off-by: Random J Developer <random@...eloper.example.org>
> 
> using your real name (sorry, no pseudonyms or anonymous contributions.)"
> 
> I know how it feels, but that is how it goes. You'll have to change that.

oh well, another trip to the social security office and DMV.

-- 
Aristeu

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