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 for Android: free password hash cracker in your pocket
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <a6fc50f2-b0c2-32db-cbef-3de57d5e6b16@intel.com>
Date:   Wed, 18 Jul 2018 10:38:27 -0700
From:   Dave Hansen <dave.hansen@...el.com>
To:     "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Ingo Molnar <mingo@...hat.com>, x86@...nel.org,
        Thomas Gleixner <tglx@...utronix.de>,
        "H. Peter Anvin" <hpa@...or.com>,
        Tom Lendacky <thomas.lendacky@....com>
Cc:     Kai Huang <kai.huang@...ux.intel.com>,
        Jacob Pan <jacob.jun.pan@...ux.intel.com>,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCHv5 03/19] mm/ksm: Do not merge pages with different KeyIDs

On 07/17/2018 04:20 AM, Kirill A. Shutemov wrote:
> Pages encrypted with different encryption keys are not allowed to be
> merged by KSM. Otherwise it would cross security boundary.

Let's say I'm using plain AES (not AES-XTS).  I use the same key in two
keyid slots.  I map a page with the first keyid and another with the
other keyid.

Won't they have the same cipertext?  Why shouldn't we KSM them?

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ