linux-kernel - [PATCH 0/3] ubsan/overflow: Enable pattern exclusions

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Message-Id: <20250307040948.work.791-kees@kernel.org>
Date: Thu,  6 Mar 2025 20:19:08 -0800
From: Kees Cook <kees@...nel.org>
To: Justin Stitt <justinstitt@...gle.com>
Cc: Kees Cook <kees@...nel.org>,
	"Gustavo A. R. Silva" <gustavoars@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Marco Elver <elver@...gle.com>,
	Andrey Konovalov <andreyknvl@...il.com>,
	Andrey Ryabinin <ryabinin.a.a@...il.com>,
	Masahiro Yamada <masahiroy@...nel.org>,
	Nathan Chancellor <nathan@...nel.org>,
	Nicolas Schier <nicolas@...sle.eu>,
	Miguel Ojeda <ojeda@...nel.org>,
	Nick Desaulniers <ndesaulniers@...gle.com>,
	Hao Luo <haoluo@...gle.com>,
	Przemek Kitszel <przemyslaw.kitszel@...el.com>,
	Bill Wendling <morbo@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Tony Ambardar <tony.ambardar@...il.com>,
	Alexander Potapenko <glider@...gle.com>,
	Jan Hendrik Farr <kernel@...rr.cc>,
	Alexander Lobakin <aleksander.lobakin@...el.com>,
	linux-kernel@...r.kernel.org,
	linux-hardening@...r.kernel.org,
	kasan-dev@...glegroups.com,
	linux-kbuild@...r.kernel.org,
	llvm@...ts.linux.dev
Subject: [PATCH 0/3] ubsan/overflow: Enable pattern exclusions

Hi,

This brings Linux's integer overflow mitigation integration up to the
current set of features available in Clang for handling things sanely
(i.e. pattern exclusions). While this isn't over yet, it puts all the
infrastructure in place to continue keeping up to date with current
Clang development. The next step is to add support for the coming
canonical wrapping and non-wrapping types[1].

-Kees

[1] https://discourse.llvm.org/t/rfc-clang-canonical-wrapping-and-non-wrapping-types/84356

Kees Cook (3):
  ubsan/overflow: Rework integer overflow sanitizer option to turn on
    everything
  ubsan/overflow: Enable pattern exclusions
  ubsan/overflow: Enable ignorelist parsing and add type filter

 include/linux/compiler_types.h  |  2 +-
 kernel/configs/hardening.config |  2 +-
 lib/Kconfig.ubsan               | 25 +++++++++++++------------
 lib/test_ubsan.c                | 18 ++++++++++++++----
 lib/ubsan.c                     | 28 ++++++++++++++++++++++++++--
 lib/ubsan.h                     |  8 ++++++++
 scripts/Makefile.lib            |  4 ++--
 scripts/Makefile.ubsan          | 10 ++++++++--
 scripts/integer-wrap-ignore.scl |  3 +++
 9 files changed, 76 insertions(+), 24 deletions(-)
 create mode 100644 scripts/integer-wrap-ignore.scl

-- 
2.34.1