From: David Miller <davem@davemloft.net>
To: vgoyal@redhat.com
Cc: luto@amacapital.net, tj@kernel.org, dwalsh@redhat.com,
linux-kernel@vger.kernel.org, lpoetter@redhat.com,
ssorce@redhat.com, cgroups@vger.kernel.org, kay@redhat.com,
netdev@vger.kernel.org
Subject: Re: [PATCH 2/2] net: Implement SO_PASSCGROUP to enable passing cgroup path
Date: Wed, 23 Apr 2014 13:29:55 -0400 (EDT) [thread overview]
Message-ID: <20140423.132955.671992126955940387.davem@davemloft.net> (raw)
In-Reply-To: <20140423164537.GD24651@redhat.com>
From: Vivek Goyal <vgoyal@redhat.com>
Date: Wed, 23 Apr 2014 12:45:37 -0400
> On Tue, Apr 15, 2014 at 08:47:54PM -0700, Andy Lutomirski wrote:
>
> [..]
>> Here's an attack against SO_PASSCGROUP, as you implemented it: connect
>> a socket and get someone else to write(2) to it. This isn't very
>> hard. Now you've impersonated.
>
> If this is a problem then I think kernel requires fixing. Because kernel
> will apply all resource management policies based on the cgroup at write(2)
> time and not based on open() time.
Anyways, this is not even worth discussing.
We already agreed that the cgroup passed at write time with SO_PASSGROUP
enabled should be the socket creation time cgroup.
Just like SO_PASSCRED does.
The identity given is thus the one at open() time.
next prev parent reply other threads:[~2014-04-23 17:29 UTC|newest]
Thread overview: 91+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-15 21:15 [PATCH 0/2] net: Implement SO_PEERCGROUP and SO_PASSCGROUP socket options Vivek Goyal
2014-04-15 21:15 ` [PATCH 1/2] net: Implement SO_PEERCGROUP Vivek Goyal
[not found] ` <1397596546-10153-2-git-send-email-vgoyal-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2014-04-15 21:54 ` Andy Lutomirski
2014-04-16 0:22 ` Vivek Goyal
2014-04-15 21:15 ` [PATCH 2/2] net: Implement SO_PASSCGROUP to enable passing cgroup path Vivek Goyal
[not found] ` <1397596546-10153-3-git-send-email-vgoyal-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2014-04-15 21:53 ` Andy Lutomirski
2014-04-15 23:09 ` Simo Sorce
2014-04-16 0:20 ` Vivek Goyal
[not found] ` <20140416002010.GA5035-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2014-04-16 1:05 ` David Miller
2014-04-16 3:47 ` Andy Lutomirski
[not found] ` <CALCETrWzHYN3kKcmDTFDfGhZqE4u9+6XDtiOu5nncbK_7KKH0g-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-04-16 10:17 ` Vivek Goyal
[not found] ` <20140416101709.GA14131-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2014-04-16 14:34 ` Andy Lutomirski
[not found] ` <CALCETrUTMSpd=NYn9QuO5Y3WY0uBhjNEHO0jCwZu0L59CpeDew-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-04-16 15:10 ` Vivek Goyal
2014-04-16 12:57 ` David Miller
2014-04-16 14:37 ` Andy Lutomirski
[not found] ` <CALCETrVv8SPM5xjOVGy7qO2aq3FKtG2uG57J49nO7Wy0-gg0Ew-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-04-16 16:13 ` Simo Sorce
2014-04-16 16:21 ` Tejun Heo
[not found] ` <20140416162149.GI1257-Gd/HAXX7CRxy/B6EtB590w@public.gmane.org>
2014-04-16 16:54 ` Simo Sorce
[not found] ` <1397664837.19767.410.camel-Hs+ccMQdwurzDu64bZtGtWD2FQJk+8+b@public.gmane.org>
2014-04-16 16:31 ` Andy Lutomirski
[not found] ` <CALCETrXn7b6UuALpGUVoyQYfR2uzk5tj2ABV=dkvtFNgqM5sxQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-04-16 17:02 ` Simo Sorce
2014-04-16 17:29 ` Andy Lutomirski
[not found] ` <CALCETrU_yKQVZyVug25cxwQFjWJ7Zf20FY-6ht+RJifXtDdDWg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-04-16 17:34 ` Simo Sorce
[not found] ` <1397669685.19767.450.camel-Hs+ccMQdwurzDu64bZtGtWD2FQJk+8+b@public.gmane.org>
2014-04-16 17:53 ` Andy Lutomirski
2014-04-16 18:36 ` Vivek Goyal
[not found] ` <20140416183614.GH31074-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2014-04-16 18:40 ` Andy Lutomirski
2014-04-16 18:51 ` Vivek Goyal
2014-04-16 18:59 ` Andy Lutomirski
2014-04-16 18:06 ` Vivek Goyal
[not found] ` <20140416180642.GG31074-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2014-04-16 18:13 ` Andy Lutomirski
2014-04-16 18:25 ` Vivek Goyal
[not found] ` <20140416182530.GB550-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2014-04-16 18:35 ` Andy Lutomirski
[not found] ` <CALCETrUs1js3Br81ZkiQnsuWduzOiqDe3aV0K_z_zw0znSuiag-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-04-16 19:06 ` Vivek Goyal
2014-04-16 19:13 ` Andy Lutomirski
[not found] ` <CALCETrUv56awd+UoO_f8LLL2FVq-Hc6Bd6iBGMqWjVGpgxgTSg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-04-16 19:39 ` Vivek Goyal
2014-04-16 20:24 ` Andy Lutomirski
2014-04-17 13:41 ` Vivek Goyal
[not found] ` <CALCETrVUw5+vCCONy1VTXpskbY_eZFo2CtbehwV5Mhj4d4+icw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-04-16 18:59 ` Vivek Goyal
2014-04-17 15:41 ` Daniel J Walsh
2014-04-17 16:05 ` Andy Lutomirski
[not found] ` <534FF61B.4010901-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2014-04-17 16:04 ` Simo Sorce
[not found] ` <1397750674.2628.44.camel-Hs+ccMQdwurzDu64bZtGtWD2FQJk+8+b@public.gmane.org>
2014-04-17 16:11 ` Andy Lutomirski
[not found] ` <CALCETrUrj2LtAoXp600BD2ANgE2UUEbTYQrK8hHqDR=qpeFPcg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-04-17 16:24 ` Simo Sorce
[not found] ` <1397751853.2628.50.camel-Hs+ccMQdwurzDu64bZtGtWD2FQJk+8+b@public.gmane.org>
2014-04-17 16:37 ` Andy Lutomirski
[not found] ` <CALCETrWNWvumFg9Qba0GEOjYop4WYe530tCPtakrhnoCrHqhUQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-04-17 16:48 ` Simo Sorce
[not found] ` <1397753323.2628.60.camel-Hs+ccMQdwurzDu64bZtGtWD2FQJk+8+b@public.gmane.org>
2014-04-17 16:55 ` Andy Lutomirski
[not found] ` <CALCETrXj6kD3E+vsaWmkrSbaQYTu=c-Hsw640jh4O+FbojYk2g-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-04-17 17:12 ` Vivek Goyal
2014-04-17 17:26 ` Andy Lutomirski
[not found] ` <CALCETrVq4HRpfWOAbZAQbyjuraQd=OxnW=WjSoe5JgBzRStiKg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-04-17 17:33 ` Simo Sorce
[not found] ` <1397756025.2628.64.camel-Hs+ccMQdwurzDu64bZtGtWD2FQJk+8+b@public.gmane.org>
2014-04-17 17:35 ` Andy Lutomirski
[not found] ` <CALCETrVBJFgKwRKBE2jAG6kiGgkJ+MyQiw2nyz5yj0h68kCk9A-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-04-17 17:47 ` Simo Sorce
[not found] ` <1397756821.2628.69.camel-Hs+ccMQdwurzDu64bZtGtWD2FQJk+8+b@public.gmane.org>
2014-04-17 18:05 ` Andy Lutomirski
2014-04-17 18:23 ` Simo Sorce
[not found] ` <1397759013.2628.86.camel-Hs+ccMQdwurzDu64bZtGtWD2FQJk+8+b@public.gmane.org>
2014-04-17 18:33 ` Andy Lutomirski
2014-04-17 18:50 ` Vivek Goyal
[not found] ` <20140417185023.GA32527-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2014-04-17 18:57 ` Vivek Goyal
[not found] ` <20140417185742.GB32527-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2014-04-17 19:06 ` Andy Lutomirski
[not found] ` <CALCETrXJPJeGBdauQS_WR5FNaZXR=05NjNKuC6r0xFORt+eaJQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-04-17 19:15 ` Simo Sorce
2014-04-17 19:19 ` Andy Lutomirski
2014-04-17 19:10 ` Simo Sorce
[not found] ` <1397761817.2628.113.camel-Hs+ccMQdwurzDu64bZtGtWD2FQJk+8+b@public.gmane.org>
2014-04-17 19:16 ` Vivek Goyal
[not found] ` <20140417191646.GA2461-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2014-04-17 19:46 ` Andy Lutomirski
[not found] ` <CALCETrW3F1+3qF3thrAmuoWVbRveBJ2=owpigh4mv6iAafoQCw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-04-21 15:03 ` Vivek Goyal
2014-04-21 15:47 ` Andy Lutomirski
2014-04-23 15:07 ` Vivek Goyal
2014-04-23 15:37 ` Andy Lutomirski
2014-04-23 16:01 ` Vivek Goyal
2014-04-17 19:23 ` Andy Lutomirski
2014-04-17 17:52 ` Simo Sorce
[not found] ` <1397757169.2628.75.camel-Hs+ccMQdwurzDu64bZtGtWD2FQJk+8+b@public.gmane.org>
2014-04-17 18:04 ` Andy Lutomirski
[not found] ` <CALCETrUon7mZzp12th2bZ=cJyTjn8ePwg_VtPWL_bykjnnpKLw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-04-17 18:31 ` Simo Sorce
2014-04-17 16:38 ` Vivek Goyal
2014-04-17 16:12 ` Vivek Goyal
2014-04-23 16:45 ` Vivek Goyal
2014-04-23 17:29 ` David Miller [this message]
[not found] ` <20140423.132955.671992126955940387.davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
2014-04-24 20:34 ` Vivek Goyal
[not found] ` <20140424203427.GC19091-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2014-04-24 20:48 ` David Miller
2014-04-24 21:04 ` Vivek Goyal
2014-04-24 21:11 ` David Miller
[not found] ` <20140424.171155.806959282091051918.davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
2014-04-25 0:29 ` Simo Sorce
[not found] ` <1397596546-10153-1-git-send-email-vgoyal-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2014-04-22 20:05 ` [PATCH 0/2] net: Implement SO_PEERCGROUP and SO_PASSCGROUP socket options David Miller
2014-04-22 20:08 ` Andy Lutomirski
2014-04-22 20:29 ` David Miller
2014-04-22 20:31 ` Andy Lutomirski
2014-04-22 20:32 ` David Miller
[not found] ` <20140422.163251.1863774803211446171.davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
2014-04-23 0:37 ` Andy Lutomirski
[not found] ` <CALCETrX_TCbKy-3W590wG3rq9O3Hzbqc_wu3EGg7PKn2NNsTpQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-04-23 19:05 ` Vivek Goyal
2014-04-23 20:53 ` Daniel J Walsh
[not found] ` <5358284B.7020706-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2014-04-24 13:01 ` Vivek Goyal
[not found] ` <20140422.160558.627080587952506099.davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
2014-04-23 15:55 ` Vivek Goyal
[not found] ` <20140423155512.GA24651-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2014-04-23 16:16 ` Vivek Goyal
2014-04-23 17:21 ` Andy Lutomirski
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20140423.132955.671992126955940387.davem@davemloft.net \
--to=davem@davemloft.net \
--cc=cgroups@vger.kernel.org \
--cc=dwalsh@redhat.com \
--cc=kay@redhat.com \
--cc=linux-kernel@vger.kernel.org \
--cc=lpoetter@redhat.com \
--cc=luto@amacapital.net \
--cc=netdev@vger.kernel.org \
--cc=ssorce@redhat.com \
--cc=tj@kernel.org \
--cc=vgoyal@redhat.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).