[PATCH 0/5 v10] KASan for Arm

From: Linus Walleij <linus.walleij@linaro.org>
To: Florian Fainelli <f.fainelli@gmail.com>,
	Abbott Liu <liuwenliang@huawei.com>,
	Russell King <linux@armlinux.org.uk>,
	Ard Biesheuvel <ardb@kernel.org>,
	Andrey Ryabinin <aryabinin@virtuozzo.com>,
	Mike Rapoport <rppt@linux.ibm.com>
Cc: Linus Walleij <linus.walleij@linaro.org>,
	Arnd Bergmann <arnd@arndb.de>,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH 0/5 v10] KASan for Arm
Date: Mon, 15 Jun 2020 11:02:42 +0200	[thread overview]
Message-ID: <20200615090247.5218-1-linus.walleij@linaro.org> (raw)

This is the v10 version of the KASan patches for ARM.

Mainly a rebase and the initialization was rewritten to conform
to the introduction of p4d visibility in the ARM architecture.

ChangeLog v9->v10:

- Rewrote the memory initialization to be recursive, reuse the
  same functions in early and proper init() and to account for
  the introduction of p4d in the ARM architecture.

Caveat:

The Device Tree problem on Qualcomm APQ8060 and others is still
haunting me. The working assumption is that the memory where the
device tree is stored get corrupted during early boot. It is
unclear why but it could be related to the increased memory
consumption when using KASan.

Most tested platforms from ARMv4 thru ARMv7 work fine.

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                  |  32 ++
 arch/arm/include/asm/kasan_def.h              |  81 +++++
 arch/arm/include/asm/memory.h                 |   5 +
 arch/arm/include/asm/pgalloc.h                |   9 +-
 arch/arm/include/asm/string.h                 |  21 ++
 arch/arm/include/asm/thread_info.h            |   4 +
 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                      | 304 ++++++++++++++++++
 arch/arm/mm/mmu.c                             |  18 ++
 arch/arm/mm/pgd.c                             |  15 +-
 arch/arm/vdso/Makefile                        |   2 +
 26 files changed, 562 insertions(+), 15 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

-- 
2.25.4

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