From: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
To: Casey Schaufler <casey@schaufler-ca.com>
Cc: Andy Lutomirski <luto@kernel.org>,
casey.schaufler@intel.com,
Sean Christopherson <sean.j.christopherson@intel.com>,
linux-sgx@vger.kernel.org, "Svahn, Kai" <kai.svahn@intel.com>,
"Schlobohm, Bruce" <bruce.schlobohm@intel.com>,
Stephen Smalley <sds@tycho.nsa.gov>,
Haitao Huang <haitao.huang@linux.intel.com>
Subject: Re: [PATCH 2/4] x86/sgx: Put enclaves into anonymous files
Date: Fri, 3 Apr 2020 18:30:41 +0300 [thread overview]
Message-ID: <20200403153041.GA2787@linux.intel.com> (raw)
In-Reply-To: <f8698536-074e-6562-05df-26145a4c43b9@schaufler-ca.com>
On Fri, Apr 03, 2020 at 07:35:16AM -0700, Casey Schaufler wrote:
>
> On 4/2/2020 11:56 PM, Jarkko Sakkinen wrote:
> > On Thu, Apr 02, 2020 at 02:41:39PM -0700, Andy Lutomirski wrote:
> >> On Tue, Mar 31, 2020 at 5:24 PM Sean Christopherson
> >> <sean.j.christopherson@intel.com> wrote:
> >>> On Tue, Mar 31, 2020 at 10:39:38AM -0700, Andy Lutomirski wrote:
> >>>
> >>> If EXECMEM is a sticking point, one way to dodge it would be to add a
> >>> helper to allow SELinux to detect enclave files. It'd be ugly, but simple.
> >>> That doesn't solve the generic labeling issue though. It also begs the
> >>> question of why hacking SELinux but not do_mmap() would be acceptable.
> >>>
> >>> If you have any ideas for fixing the noexec issue without resorting to an
> >>> anon inode, we're all ears.
> >> Hmm. Maybe teach udev to put /dev/sgx on a different fs and
> >> bind-mount it? Or make /dev/sgx be an actual filesystem? Or just
> >> mount /dev with exec enabled?
> > I'm not forseeing how the last option could work out as it is distro's
> > choice.
> >
> > Casey, do you think we could use securityfs for this or do you have some
> > other recommendation? I'm just asking you because you've used securityfs
> > a lot.
>
> I don't know how well securityfs works when mounted in a container,
> but otherwise it would seem like a viable option. On the other hand,
> pseudo filesystems are pretty easy to write, so /sys/fs/sgxfs wouldn't
> be a bad choice, either.
Ugh, sorry, forgot for a while that smackfs is independent fs.
How does smackfs interact with namespaces?
/Jarkko
next prev parent reply other threads:[~2020-04-03 15:30 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-31 11:44 [PATCH 0/4] Migrate enclave mapping to an anonymous inode Jarkko Sakkinen
2020-03-31 11:44 ` [PATCH 1/4] x86/sgx: Remove PROT_NONE branch from sgx_encl_may_map() Jarkko Sakkinen
2020-03-31 11:44 ` [PATCH 2/4] x86/sgx: Put enclaves into anonymous files Jarkko Sakkinen
2020-03-31 17:39 ` Andy Lutomirski
2020-04-01 0:24 ` Sean Christopherson
2020-04-02 21:41 ` Andy Lutomirski
2020-04-03 6:56 ` Jarkko Sakkinen
2020-04-03 6:59 ` Jarkko Sakkinen
2020-04-03 14:35 ` Casey Schaufler
2020-04-03 15:30 ` Jarkko Sakkinen [this message]
2020-04-03 15:50 ` Casey Schaufler
2020-04-03 22:08 ` Jarkko Sakkinen
2020-04-04 3:54 ` Andy Lutomirski
2020-04-04 5:46 ` Jethro Beekman
2020-04-04 7:27 ` Topi Miettinen
2020-04-04 9:20 ` Jarkko Sakkinen
2020-04-06 6:42 ` Jethro Beekman
2020-04-06 11:01 ` Topi Miettinen
2020-04-06 16:44 ` Andy Lutomirski
2020-04-06 17:17 ` Jethro Beekman
2020-04-06 18:55 ` Jarkko Sakkinen
2020-04-06 19:01 ` Jarkko Sakkinen
2020-04-06 19:53 ` Andy Lutomirski
2020-04-06 21:24 ` Jarkko Sakkinen
2020-04-06 23:18 ` Andy Lutomirski
2020-04-06 23:48 ` Jarkko Sakkinen
2020-04-07 7:15 ` Jethro Beekman
2020-04-07 8:48 ` Topi Miettinen
2020-04-07 16:52 ` Jarkko Sakkinen
2020-04-07 9:04 ` Topi Miettinen
2020-04-07 16:57 ` Jarkko Sakkinen
2020-04-07 16:59 ` Jarkko Sakkinen
2020-04-07 18:04 ` Jarkko Sakkinen
2020-04-07 19:54 ` Topi Miettinen
2020-04-08 13:40 ` Jarkko Sakkinen
2020-04-08 14:56 ` Sean Christopherson
2020-04-09 18:39 ` Jarkko Sakkinen
2020-04-08 21:15 ` Topi Miettinen
2020-04-08 21:29 ` Sean Christopherson
2020-11-19 7:23 ` Jethro Beekman
2020-11-19 16:09 ` Andy Lutomirski
2020-04-06 18:47 ` Jarkko Sakkinen
2020-04-04 9:22 ` Jarkko Sakkinen
2020-04-01 8:45 ` Jarkko Sakkinen
2020-03-31 11:44 ` [PATCH 3/4] x86/sgx: Move mmap() to the anonymous enclave file Jarkko Sakkinen
2020-03-31 11:44 ` [PATCH 4/4] x86/sgx: Hand over the enclave file to the user space Jarkko Sakkinen
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