From: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
To: Sean Christopherson <sean.j.christopherson@intel.com>
Cc: Andy Lutomirski <luto@kernel.org>,
Stephen Smalley <sds@tycho.nsa.gov>,
James Morris <jmorris@namei.org>,
"Serge E. Hallyn" <serge@hallyn.com>,
LSM List <linux-security-module@vger.kernel.org>,
Paul Moore <paul@paul-moore.com>,
Eric Paris <eparis@parisplace.org>,
selinux@vger.kernel.org, Jethro Beekman <jethro@fortanix.com>,
"Xing, Cedric" <cedric.xing@intel.com>,
"Hansen, Dave" <dave.hansen@intel.com>,
Thomas Gleixner <tglx@linutronix.de>,
"Dr. Greg" <greg@enjellic.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
LKML <linux-kernel@vger.kernel.org>, X86 ML <x86@kernel.org>,
"linux-sgx@vger.kernel.org" <linux-sgx@vger.kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
"nhorman@redhat.com" <nhorman@redhat.com>,
"npmccallum@redhat.com" <npmccallum@redhat.com>,
"Ayoun, Serge" <serge.ayoun@intel.com>,
"Katz-zamir, Shay" <shay.katz-zamir@intel.com>,
"Huang, Haitao" <haitao.huang@intel.com>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
"Svahn, Kai" <kai.svahn@intel.com>,
Borislav Petkov <bp@alien8.de>,
Josh Triplett <josh@joshtriplett.org>,
"Huang, Kai" <kai.huang@intel.com>,
David Rientjes <rientjes@google.com>
Subject: Re: SGX vs LSM (Re: [PATCH v20 00/28] Intel SGX1 support)
Date: Mon, 27 May 2019 16:38:39 +0300 [thread overview]
Message-ID: <20190527133839.GB9732@linux.intel.com> (raw)
In-Reply-To: <20190527133418.GA9732@linux.intel.com>
On Mon, May 27, 2019 at 04:34:31PM +0300, Jarkko Sakkinen wrote:
> On Thu, May 23, 2019 at 07:17:52AM -0700, Sean Christopherson wrote:
> > 1. Do nothing. Userspace would essentially be required to mmap() the
> > enclave after EINIT, which is ugly but not breaking since userspace
> > could mmap() the enclave with a placeholder VMA prior to building
> > the enclave, and then a series of mmap() to establish its "real"
> > mapping.
>
> What it'd break to return error if mmap() is done before EINIT?
>
> > 2. Propagate the permissions from EADD to the VMAs of the current mm
> > if the entire EADD range is mapped and the mapping is PROT_NONE.
>
> Right now you can do multiple mmap's. If the mmap's must be done after
> EINIT, the driver could check that permissions match the permissions in
> that range.
>
> This leaves open how to deal with mprotect() but if the process does not
> have FILE__WRITE I guess you cannot do much.
>
> > 3. Propagate the permissions from EADD to the VMAs of all mm structs
> > that have mapped some piece of the enclave, following the matching
> > rules from #2.
>
> For me it looks that allowing mmap's only after EINIT would result the
> least confusing implemntation.
Obvious problem is of course the requirement of fixed mapping, which is
of course nasty.
/Jarkko
next prev parent reply other threads:[~2019-05-27 13:39 UTC|newest]
Thread overview: 127+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <8fe520bb-30bd-f246-a3d8-c5443e47a014@intel.com>
[not found] ` <358e9b36-230f-eb18-efdb-b472be8438b4@fortanix.com>
[not found] ` <960B34DE67B9E140824F1DCDEC400C0F4E886094@ORSMSX116.amr.corp.intel.com>
[not found] ` <6da269d8-7ebb-4177-b6a7-50cc5b435cf4@fortanix.com>
[not found] ` <CALCETrWCZQwg-TUCm58DVG43=xCKRsMe1tVHrR8vdt06hf4fWA@mail.gmail.com>
[not found] ` <20190513102926.GD8743@linux.intel.com>
[not found] ` <20190514104323.GA7591@linux.intel.com>
[not found] ` <CALCETrVbgTCnPo=PAq0-KoaRwt--urrPzn==quAJ8wodCpkBkw@mail.gmail.com>
[not found] ` <20190514204527.GC1977@linux.intel.com>
[not found] ` <CALCETrX6aL367mMJh5+Y1Seznfu-AvhPV6P7GkWF4Dhu0GV8cw@mail.gmail.com>
[not found] ` <20190515013031.GF1977@linux.intel.com>
2019-05-15 18:27 ` SGX vs LSM (Re: [PATCH v20 00/28] Intel SGX1 support) Andy Lutomirski
2019-05-15 19:58 ` James Morris
2019-05-15 20:35 ` Andy Lutomirski
2019-05-15 22:46 ` James Morris
2019-05-15 23:13 ` Andy Lutomirski
2019-05-16 3:03 ` Xing, Cedric
2019-05-16 4:40 ` Andy Lutomirski
2019-05-16 22:23 ` Xing, Cedric
2019-05-17 0:35 ` Andy Lutomirski
2019-05-17 1:06 ` Xing, Cedric
2019-05-17 1:21 ` Andy Lutomirski
2019-05-17 16:05 ` Sean Christopherson
2019-05-17 13:53 ` Stephen Smalley
2019-05-17 15:09 ` Sean Christopherson
2019-05-17 16:20 ` Stephen Smalley
2019-05-17 16:24 ` Andy Lutomirski
2019-05-17 16:37 ` Stephen Smalley
2019-05-17 17:12 ` Andy Lutomirski
2019-05-17 18:05 ` Stephen Smalley
2019-05-17 19:20 ` Stephen Smalley
2019-05-17 19:28 ` Sean Christopherson
2019-05-17 20:09 ` Stephen Smalley
2019-05-17 20:14 ` Andy Lutomirski
2019-05-17 20:34 ` Stephen Smalley
2019-05-17 21:36 ` Sean Christopherson
2019-05-17 17:29 ` Sean Christopherson
2019-05-17 17:42 ` Stephen Smalley
2019-05-17 17:50 ` Sean Christopherson
2019-05-17 18:16 ` Stephen Smalley
2019-05-17 17:43 ` Andy Lutomirski
2019-05-17 17:55 ` Sean Christopherson
2019-05-17 18:04 ` Linus Torvalds
2019-05-17 18:21 ` Sean Christopherson
2019-05-17 18:33 ` Linus Torvalds
2019-05-17 18:52 ` Sean Christopherson
2019-05-17 18:53 ` Andy Lutomirski
2019-05-16 7:24 ` James Morris
2019-05-16 21:00 ` Andy Lutomirski
2019-05-20 9:38 ` Dr. Greg
2019-05-15 21:38 ` Sean Christopherson
2019-05-16 1:19 ` Haitao Huang
2019-05-16 5:16 ` Jarkko Sakkinen
2019-05-16 21:02 ` Andy Lutomirski
2019-05-16 22:45 ` Sean Christopherson
2019-05-16 23:29 ` Xing, Cedric
2019-05-20 11:29 ` Jarkko Sakkinen
2019-05-20 11:33 ` Jarkko Sakkinen
2019-05-17 0:03 ` Sean Christopherson
2019-05-17 0:26 ` Andy Lutomirski
2019-05-17 15:41 ` Sean Christopherson
2019-05-20 11:42 ` Jarkko Sakkinen
2019-05-20 11:41 ` Jarkko Sakkinen
2019-05-21 15:19 ` Jarkko Sakkinen
2019-05-21 15:24 ` Jethro Beekman
2019-05-22 13:10 ` Jarkko Sakkinen
2019-05-21 15:51 ` Sean Christopherson
2019-05-22 13:20 ` Jarkko Sakkinen
2019-05-22 13:22 ` Jarkko Sakkinen
2019-05-22 13:56 ` Stephen Smalley
2019-05-22 15:38 ` Sean Christopherson
2019-05-22 22:42 ` Andy Lutomirski
2019-05-23 2:35 ` Sean Christopherson
2019-05-23 10:26 ` Jarkko Sakkinen
2019-05-23 14:17 ` Sean Christopherson
2019-05-23 15:38 ` Andy Lutomirski
2019-05-23 23:40 ` Sean Christopherson
2019-05-24 1:17 ` Andy Lutomirski
2019-05-24 7:24 ` Xing, Cedric
2019-05-24 15:41 ` Stephen Smalley
2019-05-24 16:57 ` Xing, Cedric
2019-05-24 17:42 ` Sean Christopherson
2019-05-24 17:54 ` Andy Lutomirski
2019-05-24 17:56 ` Sean Christopherson
2019-05-24 17:54 ` Sean Christopherson
2019-05-24 18:34 ` Xing, Cedric
2019-05-24 19:13 ` Sean Christopherson
2019-05-24 19:30 ` Andy Lutomirski
2019-05-24 20:42 ` Xing, Cedric
2019-05-24 21:11 ` Sean Christopherson
2019-05-24 19:37 ` Andy Lutomirski
2019-05-24 20:03 ` Sean Christopherson
2019-05-24 20:58 ` Xing, Cedric
2019-05-24 21:27 ` Andy Lutomirski
2019-05-24 22:41 ` Sean Christopherson
2019-05-24 23:42 ` Andy Lutomirski
2019-05-25 22:40 ` Xing, Cedric
2019-05-26 0:57 ` Andy Lutomirski
2019-05-26 6:09 ` Xing, Cedric
2019-05-28 20:24 ` Sean Christopherson
2019-05-28 20:48 ` Andy Lutomirski
2019-05-28 21:41 ` Sean Christopherson
2019-05-30 5:38 ` Xing, Cedric
2019-05-30 17:21 ` Sean Christopherson
2019-05-29 14:08 ` Stephen Smalley
2019-05-30 6:12 ` Xing, Cedric
2019-05-30 14:22 ` Stephen Smalley
2019-05-30 14:31 ` Andy Lutomirski
2019-05-30 15:04 ` Stephen Smalley
2019-05-30 16:14 ` Andy Lutomirski
2019-05-30 18:01 ` Sean Christopherson
2019-05-30 19:20 ` Andy Lutomirski
2019-05-30 21:16 ` Sean Christopherson
2019-05-30 21:23 ` Andy Lutomirski
2019-05-30 21:36 ` Sean Christopherson
2019-06-03 9:12 ` Dr. Greg
2019-06-03 21:08 ` Jarkko Sakkinen
2019-05-30 21:48 ` Xing, Cedric
2019-05-30 22:24 ` Sean Christopherson
2019-06-03 21:05 ` Jarkko Sakkinen
2019-06-03 20:54 ` Jarkko Sakkinen
2019-06-03 21:23 ` Sean Christopherson
2019-06-04 11:39 ` Jarkko Sakkinen
2019-06-03 21:37 ` Andy Lutomirski
2019-06-03 20:47 ` Jarkko Sakkinen
2019-06-03 20:43 ` Jarkko Sakkinen
2019-05-25 17:31 ` Dr. Greg
2019-05-24 16:43 ` Andy Lutomirski
2019-05-24 17:07 ` Sean Christopherson
2019-05-24 17:51 ` Andy Lutomirski
2019-05-24 14:44 ` Stephen Smalley
2019-05-27 13:48 ` Jarkko Sakkinen
2019-05-23 19:58 ` Sean Christopherson
2019-05-27 13:34 ` Jarkko Sakkinen
2019-05-27 13:38 ` Jarkko Sakkinen [this message]
2019-05-23 8:10 ` Jarkko Sakkinen
2019-05-23 8:23 ` Jarkko Sakkinen
2019-05-20 11:36 ` Jarkko Sakkinen
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