From: John Johansen <john.johansen@canonical.com>
To: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>,
Casey Schaufler <casey@schaufler-ca.com>,
Paul Moore <paul@paul-moore.com>
Cc: LSM List <linux-security-module@vger.kernel.org>,
James Morris <jmorris@namei.org>,
linux-audit@redhat.com, Mimi Zohar <zohar@linux.ibm.com>,
keescook@chromium.org, SElinux list <selinux@vger.kernel.org>
Subject: Re: LSM stacking in next for 6.1?
Date: Thu, 15 Sep 2022 07:54:52 -0700 [thread overview]
Message-ID: <9175fe91-8b5c-6715-940d-dddfd1f42131@canonical.com> (raw)
In-Reply-To: <c2a3279d-451d-23df-0911-e545d21492e6@I-love.SAKURA.ne.jp>
On 9/15/22 07:27, Tetsuo Handa wrote:
> On 2022/09/15 0:50, Casey Schaufler wrote:
>> On 9/14/2022 6:57 AM, Tetsuo Handa wrote:
>>> Please distinguish the difference between "enable" and "support" at
>>> https://bugzilla.redhat.com/show_bug.cgi?id=542986#c7 . (By the way,
>>> I hate the word "support", for nobody can share agreed definition.)
>>>
>>> "enable" is something like "available", "allow to exist".
>>>
>>> "support" is something like "guaranteed", "provide efforts for fixing bugs".
>>>
>>> However, in the Red Hat's world, "enable" == "support". The kernel config options
>>> enabled by Red Hat is supported by Red Hat, and the kernel config options Red Hat
>>> cannot support cannot be enabled by Red Hat.
>>
>> The "enable" == "support" model in consistent with the expectations of
>> paying customers.
>
> Regarding CONFIG_MODULES=y,
> "Vendor-A enables module-A" == "Vendor-A provides support for module-A" and
> "Vendor-B enables module-B" == "Vendor-B provides support for module-B".
>
> Regarding CONFIG_SECURITY=y (namely in the RH world),
> "Distributor-A enables LSM-A" == "Distributor-A provides support for LSM-A".
> However, "Distributor-A does not enable LSM-B" == "Some vendor is impossible to
> provide support for LSM-B".
>
> "Distributor-A does not enable module-B" == "Distributor-A is not responsible for
> providing support for module-B" and "Vendor-B enables LSM-B" == "Vendor-B provides
> support for LSM-B" are what I expect.
>
> Current LSM interface does not allow LSM-B to exist in Distributor-A's systems.
> The "enable" == "support" model should be allowed for LSM interface as well.
> What a strange asymmetry rule!
>
>
>
>>> On the contrary, in the vanilla kernel's world, the in-tree version of TOMOYO
>>> cannot be built as a loadable module LSM. And it is impossible to built TOMOYO
>>> as a loadable module LSM (so that TOMOYO can be used without the "support" by
>>> Red Hat). As a result, users cannot try LSMs (either in-tree or out-of-tree)
>>> other than SELinux.
>>
>> That is correct. Redhat has chosen to support only SELinux. If you want
>> TOMOYO to be enabled in a distribution you need to sell the value to a
>> distributor (really, really hard) Or (not recommended) become one yourself.
>
> What I'm asking is "allow non-SELinux to exist in RH systems".
> I'm not asking RH to "provide efforts for fixing non-SELinux".
> Being able to build in-tree version of TOMOYO via "make M=security/tomoyo"
> releases RH from the "enable" == "support" spell.
>
I am sympathetic, I want this too. But RH choices are not a technical problem,
they could easily enable and not support other LSMs (eg. Ubuntu does). It is a
political problem and I don't see loadable LSMs changing this.
next prev parent reply other threads:[~2022-09-15 14:55 UTC|newest]
Thread overview: 74+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <791e13b5-bebd-12fc-53de-e9a86df23836.ref@schaufler-ca.com>
2022-08-03 0:01 ` LSM stacking in next for 6.1? Casey Schaufler
2022-08-03 0:56 ` Paul Moore
2022-08-03 1:56 ` John Johansen
2022-08-03 2:15 ` Casey Schaufler
2022-08-03 2:33 ` Paul Moore
2022-08-03 2:34 ` Steve Grubb
2022-08-03 2:40 ` Paul Moore
2022-09-02 21:30 ` Paul Moore
2022-09-02 23:14 ` Casey Schaufler
2022-09-02 23:57 ` Casey Schaufler
2022-09-06 23:24 ` Paul Moore
2022-09-07 0:10 ` John Johansen
2022-09-07 0:39 ` Casey Schaufler
2022-09-07 0:50 ` John Johansen
2022-09-07 14:41 ` Paul Moore
2022-09-07 16:41 ` Casey Schaufler
2022-09-07 17:23 ` John Johansen
2022-09-07 22:57 ` Paul Moore
2022-09-07 23:27 ` Paul Moore
2022-09-07 23:53 ` Casey Schaufler
2022-09-08 0:19 ` John Johansen
2022-09-08 3:57 ` Paul Moore
2022-09-08 18:05 ` Casey Schaufler
2022-09-08 18:35 ` John Johansen
2022-09-08 19:32 ` Paul Moore
2022-09-08 22:56 ` Casey Schaufler
2022-09-10 4:17 ` Tetsuo Handa
2022-09-12 17:37 ` Casey Schaufler
2022-09-13 10:47 ` Tetsuo Handa
2022-09-13 14:45 ` Casey Schaufler
2022-09-14 13:57 ` Tetsuo Handa
2022-09-14 15:50 ` Casey Schaufler
2022-09-15 14:27 ` Tetsuo Handa
2022-09-15 14:54 ` John Johansen [this message]
2022-09-15 7:45 ` John Johansen
2022-09-15 14:27 ` Tetsuo Handa
2022-10-25 9:48 ` Tetsuo Handa
2022-10-25 10:26 ` John Johansen
2022-10-25 11:20 ` Tetsuo Handa
2022-10-25 14:12 ` Casey Schaufler
2022-10-25 22:12 ` Tetsuo Handa
2022-10-25 22:41 ` Casey Schaufler
2022-10-26 10:19 ` Tetsuo Handa
2022-10-26 15:30 ` Casey Schaufler
2022-10-28 10:14 ` John Johansen
2022-10-30 4:03 ` Tetsuo Handa
2022-10-30 7:23 ` John Johansen
2022-10-30 14:02 ` Tetsuo Handa
2022-10-30 16:37 ` Kees Cook
2022-10-30 20:56 ` Casey Schaufler
2022-10-31 10:26 ` Tetsuo Handa
2022-10-31 15:47 ` Casey Schaufler
2022-10-26 20:11 ` Paul Moore
2022-10-27 0:02 ` Tetsuo Handa
2022-10-28 9:50 ` Paul Moore
2022-10-28 13:58 ` Tetsuo Handa
2022-10-28 17:40 ` Kees Cook
2022-10-29 9:33 ` Tetsuo Handa
2022-09-14 13:42 ` Paul Moore
2022-09-27 20:54 ` Casey Schaufler
2022-09-27 22:37 ` Paul Moore
2022-09-07 0:31 ` Casey Schaufler
2022-09-07 15:13 ` Paul Moore
2022-09-07 17:08 ` Casey Schaufler
2022-09-07 23:04 ` Paul Moore
2022-09-07 23:26 ` Casey Schaufler
2022-09-08 15:18 ` Tetsuo Handa
2022-09-08 16:00 ` Casey Schaufler
2022-09-08 18:52 ` Paul Moore
2022-09-09 11:32 ` Tetsuo Handa
2022-09-14 13:56 ` Paul Moore
2022-09-15 14:27 ` Tetsuo Handa
2022-09-15 15:50 ` Casey Schaufler
2022-09-16 13:34 ` Tetsuo Handa
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