From: Andrew Morton <akpm@linux-foundation.org>
To: Maciej Wieczor-Retman <m.wieczorretman@pm.me>
Cc: xin@zytor.com, peterz@infradead.org, kaleshsingh@google.com,
kbingham@kernel.org, nathan@kernel.org, ryabinin.a.a@gmail.com,
dave.hansen@linux.intel.com, bp@alien8.de, morbo@google.com,
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andreyknvl@gmail.com, maciej.wieczor-retman@intel.com,
david@redhat.com, maz@kernel.org, rppt@kernel.org,
will@kernel.org, luto@kernel.org, kasan-dev@googlegroups.com,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, x86@kernel.org,
linux-kbuild@vger.kernel.org, linux-mm@kvack.org,
llvm@lists.linux.dev, linux-doc@vger.kernel.org
Subject: Re: [PATCH v6 00/18] kasan: x86: arm64: KASAN tag-based mode for x86
Date: Wed, 29 Oct 2025 15:08:06 -0700 [thread overview]
Message-ID: <20251029150806.e001a669d9dad6ff9167c1f0@linux-foundation.org> (raw)
In-Reply-To: <cover.1761763681.git.m.wieczorretman@pm.me>
On Wed, 29 Oct 2025 19:05:27 +0000 Maciej Wieczor-Retman <m.wieczorretman@pm.me> wrote:
> The patchset aims to add a KASAN tag-based mode for the x86 architecture
> with the help of the new CPU feature called Linear Address Masking
> (LAM). Main improvement introduced by the series is 2x lower memory
> usage compared to KASAN's generic mode, the only currently available
> mode on x86. The tag based mode may also find errors that the generic
> mode couldn't because of differences in how these modes operate.
Thanks. Quite a lot of these patches aren't showing signs of review at
this time, so I'll skip v6 for now.
However patches 1&2 are fixes that have cc:stable. It's best to
separate these out from the overall add-a-feature series please - their
path-to-mainline will be quite different.
I grabbed just those two patches for some testing, however their
changelogging isn't fully appropriate. Can I ask that you resend these
as a two-patch series after updating the changelogs to clearly describe
the userspace-visible effects of the flaws which the patches fix?
This is to help -stable maintainers understand why we're proposing the
backports and it is to help people to predict whether these fixes might
address an issue which they or their customers are experiencing.
next prev parent reply other threads:[~2025-10-29 22:08 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-29 19:05 [PATCH v6 00/18] kasan: x86: arm64: KASAN tag-based mode for x86 Maciej Wieczor-Retman
2025-10-29 19:05 ` [PATCH v6 01/18] kasan: Unpoison pcpu chunks with base address tag Maciej Wieczor-Retman
2025-11-10 17:32 ` Alexander Potapenko
2025-11-17 17:51 ` Maciej Wieczór-Retman
2025-10-29 19:06 ` [PATCH v6 02/18] kasan: Unpoison vms[area] addresses with a common tag Maciej Wieczor-Retman
2025-11-10 16:40 ` Alexander Potapenko
2025-10-29 19:06 ` [PATCH v6 03/18] kasan: sw_tags: Use arithmetic shift for shadow computation Maciej Wieczor-Retman
2025-11-11 9:39 ` Alexander Potapenko
2025-11-17 18:27 ` Maciej Wieczór-Retman
2025-10-29 19:06 ` [PATCH v6 04/18] kasan: sw_tags: Support tag widths less than 8 bits Maciej Wieczor-Retman
2025-11-10 17:37 ` Alexander Potapenko
2025-11-17 18:35 ` Maciej Wieczór-Retman
2025-10-29 19:06 ` [PATCH v6 05/18] kasan: Fix inline mode for x86 tag-based mode Maciej Wieczor-Retman
2025-11-11 9:22 ` Alexander Potapenko
2025-10-29 19:07 ` [PATCH v6 06/18] x86/kasan: Add arch specific kasan functions Maciej Wieczor-Retman
2025-11-11 9:31 ` Alexander Potapenko
2025-11-17 18:41 ` Maciej Wieczór-Retman
2025-11-18 15:49 ` Maciej Wieczór-Retman
2025-10-29 19:07 ` [PATCH v6 07/18] kasan: arm64: x86: Make special tags arch specific Maciej Wieczor-Retman
2025-11-11 9:34 ` Alexander Potapenko
2025-10-29 19:07 ` [PATCH v6 08/18] x86/mm: Reset tag for virtual to physical address conversions Maciej Wieczor-Retman
2025-11-11 9:42 ` Alexander Potapenko
2025-10-29 19:07 ` [PATCH v6 09/18] mm/execmem: Untag addresses in EXECMEM_ROX related pointer arithmetic Maciej Wieczor-Retman
2025-11-11 9:13 ` Alexander Potapenko
2025-11-17 18:43 ` Maciej Wieczór-Retman
2025-10-29 20:07 ` [PATCH v6 10/18] x86/mm: Physical address comparisons in fill_p*d/pte Maciej Wieczor-Retman
2025-11-10 16:24 ` Alexander Potapenko
2025-11-17 18:58 ` Maciej Wieczór-Retman
2025-10-29 20:07 ` [PATCH v6 11/18] x86/kasan: KASAN raw shadow memory PTE init Maciej Wieczor-Retman
2025-11-11 9:11 ` Alexander Potapenko
2025-10-29 20:08 ` [PATCH v6 12/18] x86/mm: LAM compatible non-canonical definition Maciej Wieczor-Retman
2025-11-11 9:07 ` Alexander Potapenko
2025-10-29 20:08 ` [PATCH v6 13/18] x86/mm: LAM initialization Maciej Wieczor-Retman
2025-11-11 9:04 ` Alexander Potapenko
2025-10-29 20:09 ` [PATCH v6 14/18] x86: Minimal SLAB alignment Maciej Wieczor-Retman
2025-11-10 17:48 ` Alexander Potapenko
2025-11-18 11:36 ` Maciej Wieczor-Retman
2025-10-29 20:09 ` [PATCH v6 15/18] x86/kasan: Handle UD1 for inline KASAN reports Maciej Wieczor-Retman
2025-11-11 10:14 ` Alexander Potapenko
2025-11-11 10:27 ` Peter Zijlstra
2025-11-17 9:47 ` Maciej Wieczór-Retman
2025-11-18 20:35 ` Peter Zijlstra
2025-10-29 20:10 ` [PATCH v6 16/18] arm64: Unify software tag-based KASAN inline recovery path Maciej Wieczor-Retman
2025-11-11 9:02 ` Alexander Potapenko
2025-10-29 20:11 ` [PATCH v6 17/18] x86/kasan: Logical bit shift for kasan_mem_to_shadow Maciej Wieczor-Retman
2025-11-10 14:49 ` Marco Elver
2025-11-17 18:26 ` Maciej Wieczór-Retman
2025-10-29 20:11 ` [PATCH v6 18/18] x86/kasan: Make software tag-based kasan available Maciej Wieczor-Retman
2025-11-11 9:00 ` Alexander Potapenko
2025-11-18 11:48 ` Maciej Wieczor-Retman
2025-10-29 22:08 ` Andrew Morton [this message]
2025-10-29 23:13 ` [PATCH v6 00/18] kasan: x86: arm64: KASAN tag-based mode for x86 Andrew Morton
2025-10-30 5:31 ` Maciej Wieczór-Retman
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