linux-kernel - Re: [kernel-hardening] [PATCH 4/6] Protectable Memory

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Message-ID: <b75b5903-0177-8ad9-5c2b-fc63438fb5f2@huawei.com>
Date:   Sat, 3 Feb 2018 21:57:13 +0200
From:   Igor Stoppa <igor.stoppa@...wei.com>
To:     Christopher Lameter <cl@...ux.com>,
        Matthew Wilcox <willy@...radead.org>,
        Boris Lukashev <blukashev@...pervictus.com>
CC:     Jann Horn <jannh@...gle.com>, <jglisse@...hat.com>,
        Kees Cook <keescook@...omium.org>,
        Michal Hocko <mhocko@...nel.org>,
        Laura Abbott <labbott@...hat.com>,
        Christoph Hellwig <hch@...radead.org>,
        <linux-security-module@...r.kernel.org>, <linux-mm@...ck.org>,
        kernel list <linux-kernel@...r.kernel.org>,
        Kernel Hardening <kernel-hardening@...ts.openwall.com>
Subject: Re: [kernel-hardening] [PATCH 4/6] Protectable Memory

>> On Thu, 25 Jan 2018, Matthew Wilcox wrote:

>>> It's worth having a discussion about whether we want the pmalloc API
>>> or whether we want a slab-based API.  
I'd love to have some feedback specifically about the API.

I have also some idea about userspace and how to extend the pmalloc
concept to it:

http://www.openwall.com/lists/kernel-hardening/2018/01/30/20

I'll be AFK intermittently for about 2 weeks, so i might not be able to
reply immediately, but from my perspective this would be just the
beginning of a broader hardening of both kernel and userspace that I'd
like to pursue.

--
igor