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

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.



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:// 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/ | 1 +
4 files changed, 9 insertions(+), 3 deletions(-)

Kees Cook
Pixel Security

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