linux-kernel - Re: SGX vs LSM (Re: [PATCH v20 00/28] Intel SGX1 support)

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20190603205405.GE4894@linux.intel.com>
Date:   Mon, 3 Jun 2019 23:54:05 +0300
From:   Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:     Andy Lutomirski <luto@...nel.org>
Cc:     Stephen Smalley <sds@...ho.nsa.gov>,
        "Xing, Cedric" <cedric.xing@...el.com>,
        "Christopherson, Sean J" <sean.j.christopherson@...el.com>,
        William Roberts <bill.c.roberts@...il.com>,
        James Morris <jmorris@...ei.org>,
        "Serge E. Hallyn" <serge@...lyn.com>,
        LSM List <linux-security-module@...r.kernel.org>,
        Paul Moore <paul@...l-moore.com>,
        Eric Paris <eparis@...isplace.org>,
        "selinux@...r.kernel.org" <selinux@...r.kernel.org>,
        Jethro Beekman <jethro@...tanix.com>,
        "Hansen, Dave" <dave.hansen@...el.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        "Dr. Greg" <greg@...ellic.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        LKML <linux-kernel@...r.kernel.org>, X86 ML <x86@...nel.org>,
        "linux-sgx@...r.kernel.org" <linux-sgx@...r.kernel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        "nhorman@...hat.com" <nhorman@...hat.com>,
        "npmccallum@...hat.com" <npmccallum@...hat.com>,
        "Ayoun, Serge" <serge.ayoun@...el.com>,
        "Katz-zamir, Shay" <shay.katz-zamir@...el.com>,
        "Huang, Haitao" <haitao.huang@...el.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        "Svahn, Kai" <kai.svahn@...el.com>, Borislav Petkov <bp@...en8.de>,
        Josh Triplett <josh@...htriplett.org>,
        "Huang, Kai" <kai.huang@...el.com>,
        David Rientjes <rientjes@...gle.com>
Subject: Re: SGX vs LSM (Re: [PATCH v20 00/28] Intel SGX1 support)

On Thu, May 30, 2019 at 09:14:10AM -0700, Andy Lutomirski wrote:
> > What is the "source file" i.e. the target of the check?  Enclave file,
> > sigstruct file, or /dev/sgx/enclave?
> 
> Enclave file -- that is, the file backing the vma from which the data
> is loaded.

Wonder why KVM gets away without having this given that enclaves are
lot alike VMs.

> It's provided by userspace based on whether it thinks the data in
> question is enclave code.  source->vm_file is the file from which the
> code is being loaded.  I'm assuming that the user code will only set
> excute_intent ==true if it actually wants to execute the code, so, if
> there's a denial, it will be fatal.  The normal case will be that the
> request will be granted on the basis of EXECUTE.

AFAIK user spaces tells that already with the SECINFO flags. I don't
get why we need a duplicate parameter.

/Jarkko