linux-kernel - Re: [RFC v2 00/27] Kernel Address Space Isolation

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]

Date:   Fri, 12 Jul 2019 06:58:48 -0700
From:   Dave Hansen <dave.hansen@...el.com>
To:     Alexandre Chartre <alexandre.chartre@...cle.com>,
        Peter Zijlstra <peterz@...radead.org>
Cc:     Thomas Gleixner <tglx@...utronix.de>, pbonzini@...hat.com,
        rkrcmar@...hat.com, mingo@...hat.com, bp@...en8.de, hpa@...or.com,
        dave.hansen@...ux.intel.com, luto@...nel.org, kvm@...r.kernel.org,
        x86@...nel.org, linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        konrad.wilk@...cle.com, jan.setjeeilers@...cle.com,
        liran.alon@...cle.com, jwadams@...gle.com, graf@...zon.de,
        rppt@...ux.vnet.ibm.com, Paul Turner <pjt@...gle.com>
Subject: Re: [RFC v2 00/27] Kernel Address Space Isolation

On 7/12/19 6:43 AM, Alexandre Chartre wrote:
> The current approach is assuming that anything in the user address space
> can be sensitive, and so the user address space shouldn't be mapped in ASI.

Is this universally true?

There's certainly *some* mitigation provided by SMAP that would allow
userspace to remain mapped and still protected.