linux-kernel - Re: Issue with clone() and CLONE

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Message-ID: <53F67057.4030202@amacapital.net>
Date:	Thu, 21 Aug 2014 15:19:03 -0700
From:	Andy Lutomirski <luto@...capital.net>
To:	Marcel Holtmann <marcel@...tmann.org>,
	LKML <linux-kernel@...r.kernel.org>
CC:	"Eric W. Biederman" <ebiederm@...ssion.com>
Subject: Re: Issue with clone() and CLONE_NEWUSER as unprivileged user

On 08/17/2014 10:35 PM, Marcel Holtmann wrote:
> Hi,
> 
> I am trying to use clone() and CLONE_NEWUSER for creating a new user namespace as an unprivileged user. I always get an operation not permitted error. However when I used fork() + unshare() as unprivileged user, I can create the new user namespace just fine.
> 
> Is there something obvious that I am missing? My understand is that CLONE_NEWUSER should not require any special capabilities. I tried the sample code from the manpage and also from LWN.net, but both give me the same error.

It works for me on 3.16 and 3.15 but not on 3.15.8-200.fc20.x86_64.  I'm
a bit confused.  What kernel are you using?

--Andy

> 
> Regards
> 
> Marcel
> 

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