[PATCH 0/5 v15] KASan for Arm

[Linus Walleij]

This is the 15th iteration of KASan for ARM/Aarch32.

I dropped my fix in the beginning of the series for
Ard's more elaborate and thorough fix moving the DTB
out of the kernel linear mapped region and into its own
part of the memory.

This fixes my particular issue on the Qualcomm APQ8060
and I hope it may also solve Florian's issue and what
Ard has been seeing. KASan should be working with
pretty much everything you throw on it, unless you
do what I did and ran it on a 64MB system, where
under some load it can run into the OOM killer for
obvious reasons.

You are encouraged to test this patch set to find memory out
of bounds bugs with ARM32 platforms and drivers.

There is a git branch you can pull in:
https://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-integrator.git/log/?h=kasan

This branch includes Ard's two patches.

As Ard's patches are in Russell's patch tracker I will
put these there as well if it now works for everyone.

Abbott Liu (1):
  ARM: Define the virtual space of KASan's shadow region

Andrey Ryabinin (3):
  ARM: Disable KASan instrumentation for some code
  ARM: Replace string mem* functions for KASan
  ARM: Enable KASan for ARM

Linus Walleij (1):
  ARM: Initialize the mapping of KASan shadow memory

 Documentation/arm/memory.rst                  |   5 +
 Documentation/dev-tools/kasan.rst             |   4 +-
 .../features/debug/KASAN/arch-support.txt     |   2 +-
 arch/arm/Kconfig                              |  10 +
 arch/arm/boot/compressed/Makefile             |   1 +
 arch/arm/boot/compressed/string.c             |  19 ++
 arch/arm/include/asm/kasan.h                  |  33 ++
 arch/arm/include/asm/kasan_def.h              |  81 +++++
 arch/arm/include/asm/memory.h                 |   5 +
 arch/arm/include/asm/pgalloc.h                |   8 +-
 arch/arm/include/asm/string.h                 |  21 ++
 arch/arm/include/asm/thread_info.h            |   8 +
 arch/arm/include/asm/uaccess-asm.h            |   2 +-
 arch/arm/kernel/entry-armv.S                  |   3 +-
 arch/arm/kernel/entry-common.S                |   9 +-
 arch/arm/kernel/head-common.S                 |   7 +-
 arch/arm/kernel/setup.c                       |   2 +
 arch/arm/kernel/unwind.c                      |   6 +-
 arch/arm/lib/memcpy.S                         |   3 +
 arch/arm/lib/memmove.S                        |   5 +-
 arch/arm/lib/memset.S                         |   3 +
 arch/arm/mm/Makefile                          |   5 +
 arch/arm/mm/kasan_init.c                      | 284 ++++++++++++++++++
 arch/arm/mm/mmu.c                             |  18 ++
 arch/arm/mm/pgd.c                             |  16 +-
 arch/arm/vdso/Makefile                        |   2 +
 26 files changed, 548 insertions(+), 14 deletions(-)
 create mode 100644 arch/arm/include/asm/kasan.h
 create mode 100644 arch/arm/include/asm/kasan_def.h
 create mode 100644 arch/arm/mm/kasan_init.c

-- 
2.26.2