From mboxrd@z Thu Jan  1 00:00:00 1970
Reply-To: kernel-hardening@lists.openwall.com
From: "Roberts, William C" <william.c.roberts@intel.com>
Date: Thu, 6 Oct 2016 15:18:03 +0000
Message-ID: <476DC76E7D1DF2438D32BFADF679FC561CD14829@ORSMSX103.amr.corp.intel.com>
References: <1475690686-16138-1-git-send-email-william.c.roberts@intel.com>
 <CAGXu5j+EtVPabrwPXU0W8yJ5Fg0H0Nc6aPjJqqNOSx+m+TBu2Q@mail.gmail.com>
In-Reply-To: <CAGXu5j+EtVPabrwPXU0W8yJ5Fg0H0Nc6aPjJqqNOSx+m+TBu2Q@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
MIME-Version: 1.0
Subject: [kernel-hardening] RE: [PATCH] printk: introduce kptr_restrict level 3
To: Kees Cook <keescook@chromium.org>
Cc: "kernel-hardening@lists.openwall.com" <kernel-hardening@lists.openwall.com>
List-ID: <kernel-hardening.lists.openwall.com>
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