netdev - Re: [PATCH 0/5] Networking cgroup controller

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAF2d9jihrtUs870+K19zQWtvA4WOkX6ZfKC0BGTt1FQ3NVfxww@mail.gmail.com>
Date:   Wed, 24 Aug 2016 17:28:48 -0700
From:   Mahesh Bandewar (महेश बंडेवार) 
        <maheshb@...gle.com>
To:     Parav Pandit <pandit.parav@...il.com>
Cc:     Anoop Naravaram <anaravaram@...gle.com>,
        Jonathan Corbet <corbet@....net>, Tejun Heo <tj@...nel.org>,
        lizefan@...wei.com, Johannes Weiner <hannes@...xchg.org>,
        David Miller <davem@...emloft.net>, kuznet@....inr.ac.ru,
        jmorris@...ei.org, yoshfuji@...ux-ipv6.org, kaber@...sh.net,
        linux-doc@...r.kernel.org, cgroups@...r.kernel.org,
        linux-netdev <netdev@...r.kernel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        Wei Wang <weiwan@...gle.com>, tom@...bertland.com
Subject: Re: [PATCH 0/5] Networking cgroup controller

On Tue, Aug 23, 2016 at 1:49 AM, Parav Pandit <pandit.parav@...il.com> wrote:
> Hi Anoop,
>
> Regardless of usecase, I think this functionality is best handled as
> LSM functionality instead of cgroup.
>
I'm not so sure about that. Cgroup APIs are useful and this is just an
extension to it.


> Tasks which are proposed in this patch are related to access control checks.
> LSM already has required hooks for socket operations such as bind(),
> listen() as few small examples.
>
> Refer to security_socket_listen() which invokes LSM specific hooks.
> This is invoked in source/net/socket.c as part of listen() system call.
> LSM hook callback can check whether a given a process can listen to
> requested UDP port or not.
>
This has administrative overhead that is not addressed. The underlying
cgroup infrastructure takes care of it in this (current)
implementation.

> Parav
>
>
[...]