linux-kernel - [PATCH v3 0/3] x86/asm: Pin sensitive CR4 and CR0 bits

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Message-Id: <20190618045503.39105-1-keescook@chromium.org>
Date:   Mon, 17 Jun 2019 21:55:00 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     Kees Cook <keescook@...omium.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>, x86@...nel.org,
        Peter Zijlstra <peterz@...radead.org>,
        Dave Hansen <dave.hansen@...el.com>,
        linux-kernel@...r.kernel.org, kernel-hardening@...ts.openwall.com
Subject: [PATCH v3 0/3] x86/asm: Pin sensitive CR4 and CR0 bits

Hi,

This updates the cr pinning series to allow for no silent papering-over
of pinning bugs (thanks to tglx to pointing out where I needed to poke
cr4 harder). I've tested with under normal boot and hibernation.

-Kees

Kees Cook (3):
  lkdtm: Check for SMEP clearing protections
  x86/asm: Pin sensitive CR4 bits
  x86/asm: Pin sensitive CR0 bits

 arch/x86/include/asm/special_insns.h | 37 +++++++++++++++-
 arch/x86/kernel/cpu/common.c         | 20 +++++++++
 arch/x86/kernel/smpboot.c            |  8 +++-
 drivers/misc/lkdtm/bugs.c            | 66 ++++++++++++++++++++++++++++
 drivers/misc/lkdtm/core.c            |  1 +
 drivers/misc/lkdtm/lkdtm.h           |  1 +
 6 files changed, 130 insertions(+), 3 deletions(-)

--
2.17.1