linux-kernel - Re: [RFC KVM 03/27] KVM: x86: Introduce KVM separate virtual address space

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: <CALCETrV9-VAMS2K3pmkqM--pr0AYcb38ASETvwsZ5YhLtLq-9w@mail.gmail.com>
Date:   Mon, 13 May 2019 08:45:44 -0700
From:   Andy Lutomirski <luto@...nel.org>
To:     Alexandre Chartre <alexandre.chartre@...cle.com>
Cc:     Paolo Bonzini <pbonzini@...hat.com>,
        Radim Krcmar <rkrcmar@...hat.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Andrew Lutomirski <luto@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        kvm list <kvm@...r.kernel.org>, X86 ML <x86@...nel.org>,
        Linux-MM <linux-mm@...ck.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
        jan.setjeeilers@...cle.com, Liran Alon <liran.alon@...cle.com>,
        Jonathan Adams <jwadams@...gle.com>
Subject: Re: [RFC KVM 03/27] KVM: x86: Introduce KVM separate virtual address space

On Mon, May 13, 2019 at 7:39 AM Alexandre Chartre
<alexandre.chartre@...cle.com> wrote:
>
> From: Liran Alon <liran.alon@...cle.com>
>
> Create a separate mm for KVM that will be active when KVM #VMExit
> handlers run. Up until the point which we architectully need to
> access host (or other VM) sensitive data.
>
> This patch just create kvm_mm but never makes it active yet.
> This will be done by next commits.

NAK to this whole pile of code.  KVM is not so special that it can
duplicate core infrastructure like this.  Use copy_init_mm() or
improve it as needed.

--Andy