linux-kernel - Re: [PATCH v9 00/13] kasan: x86: arm64: KASAN tag-based mode for x86

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Message-ID: <CA+fCnZf+U3RhmMeGxQ-UypJw2yGd8RJ0gFKrCXsC1eQ5YO-eXw@mail.gmail.com>
Date: Tue, 20 Jan 2026 18:54:48 +0100
From: Andrey Konovalov <andreyknvl@...il.com>
To: Maciej Wieczor-Retman <m.wieczorretman@...me>
Cc: chleroy@...nel.org, surenb@...gle.com, justinstitt@...gle.com, 
	nsc@...nel.org, jan.kiszka@...mens.com, trintaeoitogc@...il.com, 
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Subject: Re: [PATCH v9 00/13] kasan: x86: arm64: KASAN tag-based mode for x86

On Tue, Jan 20, 2026 at 3:40 PM Maciej Wieczor-Retman
<m.wieczorretman@...me> wrote:
>
> Maciej Wieczor-Retman (11):
>   kasan: Fix inline mode for x86 tag-based mode
>   x86/kasan: Add arch specific kasan functions
>   x86/mm: Reset tag for virtual to physical address conversions
>   mm/execmem: Untag addresses in EXECMEM_ROX related pointer arithmetic
>   x86/mm: Use physical address comparisons in fill_p*d/pte
>   x86/kasan: Initialize KASAN raw shadow memory
>   x86/mm: Reset tags in a canonical address helper call
>   x86/mm: Initialize LAM_SUP
>   x86: Increase minimal SLAB alignment for KASAN
>   x86/kasan: Use a logical bit shift for kasan_mem_to_shadow
>   x86/kasan: Make software tag-based kasan available
>
> Samuel Holland (2):
>   kasan: sw_tags: Use arithmetic shift for shadow computation
>   kasan: arm64: x86: Make special tags arch specific
>
>  Documentation/arch/arm64/kasan-offsets.sh |  8 ++-
>  Documentation/arch/x86/x86_64/mm.rst      | 10 ++-

Still missing Documentation/dev-tools/kasan.rst updates. Feel free to
send as a separate patch to avoid resending the whole series.



>  MAINTAINERS                               |  4 +-
>  arch/arm64/Kconfig                        | 10 +--
>  arch/arm64/include/asm/kasan-tags.h       | 14 ++++
>  arch/arm64/include/asm/kasan.h            |  7 +-
>  arch/arm64/include/asm/memory.h           | 14 +++-
>  arch/arm64/include/asm/uaccess.h          |  1 +
>  arch/arm64/mm/Makefile                    |  2 +
>  arch/arm64/mm/kasan_init.c                |  7 +-
>  arch/arm64/mm/kasan_sw_tags.c             | 35 ++++++++++
>  arch/x86/Kconfig                          |  4 ++
>  arch/x86/boot/compressed/misc.h           |  1 +
>  arch/x86/include/asm/cache.h              |  4 ++
>  arch/x86/include/asm/kasan-tags.h         |  9 +++
>  arch/x86/include/asm/kasan.h              | 79 ++++++++++++++++++++++-
>  arch/x86/include/asm/page.h               |  8 +++
>  arch/x86/include/asm/page_64.h            |  1 +
>  arch/x86/kernel/head_64.S                 |  3 +
>  arch/x86/mm/init.c                        |  3 +
>  arch/x86/mm/init_64.c                     | 11 ++--
>  arch/x86/mm/kasan_init_64.c               | 24 ++++++-
>  arch/x86/mm/maccess.c                     |  2 +-
>  arch/x86/mm/physaddr.c                    |  2 +
>  include/linux/kasan-tags.h                | 21 ++++--
>  include/linux/kasan.h                     | 13 ++--
>  include/linux/mm.h                        |  6 +-
>  include/linux/mmzone.h                    |  2 +-
>  include/linux/page-flags-layout.h         |  9 +--
>  lib/Kconfig.kasan                         |  3 +-
>  mm/execmem.c                              |  9 ++-
>  mm/kasan/kasan.h                          |  7 ++
>  mm/kasan/report.c                         | 15 ++++-
>  mm/vmalloc.c                              |  7 +-
>  scripts/Makefile.kasan                    |  3 +
>  scripts/gdb/linux/kasan.py                |  5 +-
>  scripts/gdb/linux/mm.py                   |  5 +-
>  37 files changed, 312 insertions(+), 56 deletions(-)
>  create mode 100644 arch/arm64/include/asm/kasan-tags.h
>  create mode 100644 arch/arm64/mm/kasan_sw_tags.c
>  create mode 100644 arch/x86/include/asm/kasan-tags.h