[GIT PULL] usercopy protection for v4.8

[Kees Cook]

Hi,

This is my next pull request for v4.8, which introduces a kernel self
protection of copy_to_user/copy_from_user that has been under review and
test on the kernel-hardening list for a while. It has lived for a bit
in -next, and appears to be ready IMO. There will be more improvements
in the future, but this is a solid start.

Again, if I can improve these pull request emails in any way, please
let me know. :)

Thanks!

-Kees

The following changes since commit 523d939ef98fd712632d93a5a2b588e477a7565e:

  Linux 4.7 (2016-07-24 12:23:50 -0700)

are available in the git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git tags/usercopy-v4.8

for you to fetch changes up to ed18adc1cdd00a5c55a20fbdaed4804660772281:

  mm: SLUB hardened usercopy support (2016-07-26 14:43:54 -0700)

----------------------------------------------------------------
Implements HARDENED_USERCOPY verification of copy_to_user/copy_from_user
bounds checking for most architectures on SLAB and SLUB.

----------------------------------------------------------------
Kees Cook (11):
      mm: Implement stack frame object validation
      mm: Hardened usercopy
      x86/uaccess: Enable hardened usercopy
      ARM: uaccess: Enable hardened usercopy
      arm64/uaccess: Enable hardened usercopy
      ia64/uaccess: Enable hardened usercopy
      powerpc/uaccess: Enable hardened usercopy
      sparc/uaccess: Enable hardened usercopy
      s390/uaccess: Enable hardened usercopy
      mm: SLAB hardened usercopy support
      mm: SLUB hardened usercopy support

Laura Abbott (1):
      mm: Add is_migrate_cma_page

 arch/Kconfig                        |   9 ++
 arch/arm/Kconfig                    |   1 +
 arch/arm/include/asm/uaccess.h      |  11 +-
 arch/arm64/Kconfig                  |   1 +
 arch/arm64/include/asm/uaccess.h    |  29 +++-
 arch/arm64/kernel/arm64ksyms.c      |   4 +-
 arch/arm64/lib/copy_from_user.S     |   4 +-
 arch/arm64/lib/copy_to_user.S       |   4 +-
 arch/ia64/Kconfig                   |   1 +
 arch/ia64/include/asm/uaccess.h     |  18 ++-
 arch/powerpc/Kconfig                |   1 +
 arch/powerpc/include/asm/uaccess.h  |  21 ++-
 arch/s390/Kconfig                   |   1 +
 arch/s390/lib/uaccess.c             |   2 +
 arch/sparc/Kconfig                  |   1 +
 arch/sparc/include/asm/uaccess_32.h |  14 +-
 arch/sparc/include/asm/uaccess_64.h |  11 +-
 arch/x86/Kconfig                    |   2 +
 arch/x86/include/asm/thread_info.h  |  44 ++++++
 arch/x86/include/asm/uaccess.h      |  10 +-
 arch/x86/include/asm/uaccess_32.h   |   2 +
 arch/x86/include/asm/uaccess_64.h   |   2 +
 include/linux/mmzone.h              |   2 +
 include/linux/slab.h                |  12 ++
 include/linux/thread_info.h         |  24 ++++
 init/Kconfig                        |   2 +
 mm/Makefile                         |   4 +
 mm/slab.c                           |  30 ++++
 mm/slub.c                           |  40 ++++++
 mm/usercopy.c                       | 268 ++++++++++++++++++++++++++++++++++++
 security/Kconfig                    |  28 ++++
 31 files changed, 573 insertions(+), 30 deletions(-)
 create mode 100644 mm/usercopy.c

-- 
Kees Cook
Brillo & Chrome OS Security