linux-kernel - [GIT PULL] x86-refcount fix for v4.14-rc3

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Date:   Wed, 27 Sep 2017 03:29:46 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Ingo Molnar <mingo@...nel.org>
Cc:     linux-kernel@...r.kernel.org, Kees Cook <keescook@...omium.org>,
        Mike Galbraith <efault@....de>
Subject: [GIT PULL] x86-refcount fix for v4.14-rc3

Hi,

Please pull this x86-refcount fix for v4.14-rc3. This restores the x86
fast-refcount protection after fixing a corner case that was found late
before the merge window opened. This was the only problem seen during
the protection's life in linux-next, so getting this into v4.14 is
highly desired.

Thanks!

-Kees

The following changes since commit e19b205be43d11bff638cad4487008c48d21c103:

  Linux 4.14-rc2 (2017-09-24 16:38:56 -0700)

are available in the git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git tags/x86-refcount-v4.14-rc3

for you to fetch changes up to 635fee8f6b725a99f511b8e0eca82c3214b9c678:

  locking/refcounts, x86/asm: Enable CONFIG_ARCH_HAS_REFCOUNT (2017-09-27 03:05:13 -0700)

----------------------------------------------------------------
Fix x86 fast-refcount protection to avoid corner-case of being used a
function living in the .text.unlikely section.

----------------------------------------------------------------
Kees Cook (2):
      locking/refcounts, x86/asm: Use unique .text section for refcount exceptions
      locking/refcounts, x86/asm: Enable CONFIG_ARCH_HAS_REFCOUNT

 arch/x86/Kconfig                  | 2 +-
 arch/x86/include/asm/refcount.h   | 2 +-
 arch/x86/mm/extable.c             | 7 ++++++-
 include/asm-generic/vmlinux.lds.h | 1 +
 4 files changed, 9 insertions(+), 3 deletions(-)

-- 
Kees Cook
Pixel Security