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Date:   Tue, 9 Aug 2022 17:51:50 -0700
From:   Alexei Starovoitov <alexei.starovoitov@...il.com>
To:     Paul Moore <paul@...l-moore.com>
Cc:     "Eric W. Biederman" <ebiederm@...ssion.com>,
        Frederick Lawler <fred@...udflare.com>,
        KP Singh <kpsingh@...nel.org>,
        Florent Revest <revest@...omium.org>,
        Brendan Jackman <jackmanb@...omium.org>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        James Morris <jmorris@...ei.org>,
        "Serge E . Hallyn" <serge@...lyn.com>,
        Stephen Smalley <stephen.smalley.work@...il.com>,
        eparis@...isplace.org, Shuah Khan <shuah@...nel.org>,
        Christian Brauner <brauner@...nel.org>,
        Casey Schaufler <casey@...aufler-ca.com>,
        bpf <bpf@...r.kernel.org>,
        LSM List <linux-security-module@...r.kernel.org>,
        selinux@...r.kernel.org,
        "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Network Development <netdev@...r.kernel.org>,
        kernel-team <kernel-team@...udflare.com>,
        Christian Göttsche <cgzones@...glemail.com>,
        karl@...badwolfsecurity.com
Subject: Re: [PATCH v4 0/4] Introduce security_create_user_ns()

On Tue, Aug 9, 2022 at 3:40 PM Paul Moore <paul@...l-moore.com> wrote:
>
> On Tue, Aug 9, 2022 at 5:41 PM Eric W. Biederman <ebiederm@...ssion.com> wrote:
> > Paul Moore <paul@...l-moore.com> writes:
> > >
> > > What level of due diligence would satisfy you Eric?
> >
> > Having a real conversation about what a change is doing and to talk
> > about it's merits and it's pro's and cons.  I can't promise I would be
> > convinced but that is the kind of conversation it would take.
>
> Earlier today you talked about due diligence to ensure that userspace
> won't break and I provided my reasoning on why userspace would not
> break (at least not because of this change).  Userspace might be
> blocked from creating a new user namespace due to a security policy,
> but that would be the expected and desired outcome, not breakage.  As
> far as your most recent comment regarding merit and pros/cons, I
> believe we have had that discussion (quite a few times already); it
> just seems you are not satisfied with the majority's conclusion.
>
> Personally, I'm not sure there is anything more I can do to convince
> you that this patchset is reasonable; I'm going to leave it to others
> at this point, or we can all simply agree to disagree for the moment.
> Just as you haven't heard a compelling argument for this patchset, I
> haven't heard a compelling argument against it.  Barring some
> significant new discussion point, or opinion, I still plan on merging
> this into the LSM next branch when the merge window closes next week
> so it has time to go through a full round of linux-next testing.
> Assuming no unresolvable problems are found during the additional
> testing I plan to send it to Linus during the v6.1 merge window and
> I'm guessing we will get to go through this all again.  It's less than
> ideal, but I think this is where we are at right now.

+1

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