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From:   Paul Moore <paul@paul-moore.com>
Date:   Mon, 23 Nov 2020 17:42:53 -0500
Message-ID: <CAHC9VhTtLj9QPqEqO5hHPDmMnWzUaD-2PwGw=bQ=SBxvV78Sxg@mail.gmail.com>
Subject: Re: [PATCH v12 3/4] selinux: teach SELinux about anonymous inodes
To:     Lokesh Gidra <lokeshgidra@google.com>
Cc:     Andrea Arcangeli <aarcange@redhat.com>,
        Alexander Viro <viro@zeniv.linux.org.uk>,
        James Morris <jmorris@namei.org>,
        Stephen Smalley <stephen.smalley.work@gmail.com>,
        Casey Schaufler <casey@schaufler-ca.com>,
        Eric Biggers <ebiggers@kernel.org>,
        "Serge E. Hallyn" <serge@hallyn.com>,
        Eric Paris <eparis@parisplace.org>,
        Daniel Colascione <dancol@dancol.org>,
        Kees Cook <keescook@chromium.org>,
        "Eric W. Biederman" <ebiederm@xmission.com>,
        KP Singh <kpsingh@google.com>,
        David Howells <dhowells@redhat.com>,
        Thomas Cedeno <thomascedeno@google.com>,
        Anders Roxell <anders.roxell@linaro.org>,
        Sami Tolvanen <samitolvanen@google.com>,
        Matthew Garrett <matthewgarrett@google.com>,
        Aaron Goidel <acgoide@tycho.nsa.gov>,
        Randy Dunlap <rdunlap@infradead.org>,
        "Joel Fernandes (Google)" <joel@joelfernandes.org>,
        YueHaibing <yuehaibing@huawei.com>,
        Christian Brauner <christian.brauner@ubuntu.com>,
        Alexei Starovoitov <ast@kernel.org>,
        Alexey Budankov <alexey.budankov@linux.intel.com>,
        Adrian Reber <areber@redhat.com>,
        Aleksa Sarai <cyphar@cyphar.com>,
        Linux FS Devel <linux-fsdevel@vger.kernel.org>,
        linux-kernel <linux-kernel@vger.kernel.org>,
        LSM List <linux-security-module@vger.kernel.org>,
        SElinux list <selinux@vger.kernel.org>,
        Kalesh Singh <kaleshsingh@google.com>,
        Calin Juravle <calin@google.com>,
        Suren Baghdasaryan <surenb@google.com>,
        Jeffrey Vander Stoep <jeffv@google.com>,
        "Cc: Android Kernel" <kernel-team@android.com>,
        "open list:MEMORY MANAGEMENT" <linux-mm@kvack.org>,
        Andrew Morton <akpm@linux-foundation.org>, hch@infradead.org,
        Ondrej Mosnacek <omosnace@redhat.com>
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On Mon, Nov 23, 2020 at 2:21 PM Lokesh Gidra <lokeshgidra@google.com> wrote:
> On Sun, Nov 22, 2020 at 3:14 PM Paul Moore <paul@paul-moore.com> wrote:
> > On Wed, Nov 18, 2020 at 5:39 PM Lokesh Gidra <lokeshgidra@google.com> wrote:
> > > I have created a cuttlefish build and have tested with the attached
> > > userfaultfd program:
> >
> > Thanks, that's a good place to start, a few comments:
> >
> > - While we support Android as a distribution, it isn't a platform that
> > we common use for development and testing.  At the moment, Fedora is
> > probably your best choice for that.
> >
> I tried setting up a debian/ubuntu system for testing using the
> instructions on the selinux-testsuite page, but the system kept
> freezing after 'setenforce 1'. I'll try with fedora now.

I would expect you to have much better luck with Fedora.

> > - Your test program should be written in vanilla C for the
> > selinux-testsuite.  Looking at the userfaultfdSimple.cc code that
> > should be a trivial conversion.
> >
> > - I think you have a good start on a test for the selinux-testsuite,
> > please take a look at the test suite and submit a patch against that
> > repo.  Ondrej (CC'd) currently maintains the test suite and he may
> > have some additional thoughts.
> >
> > * https://github.com/SELinuxProject/selinux-testsuite
>
> Thanks a lot for the inputs. I'll start working on this.

Great, let us know if you hit any problems.  I think we would all like
to see this upstream :)

-- 
paul moore
www.paul-moore.com