linux-kernel - Re: [PATCH] KMSAN: Restore dynamic check for '-fsanitize=kernel-memory'

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <176126007537.2563454.16050415911756189258.b4-ty@kernel.org>
Date: Thu, 23 Oct 2025 23:54:35 +0100
From: Nathan Chancellor <nathan@...nel.org>
To: Alexander Potapenko <glider@...gle.com>, Marco Elver <elver@...gle.com>, 
 Dmitry Vyukov <dvyukov@...gle.com>, Nathan Chancellor <nathan@...nel.org>
Cc: Nicolas Schier <nsc@...nel.org>, Kees Cook <kees@...nel.org>, 
 kasan-dev@...glegroups.com, linux-kernel@...r.kernel.org, 
 llvm@...ts.linux.dev, kernel test robot <lkp@...el.com>
Subject: Re: [PATCH] KMSAN: Restore dynamic check for
 '-fsanitize=kernel-memory'


On Thu, 23 Oct 2025 21:01:29 +0200, Nathan Chancellor wrote:
> Commit 5ff8c11775c7 ("KMSAN: Remove tautological checks") changed
> CONFIG_HAVE_KMSAN_COMPILER from a dynamic check for
> '-fsanitize=kernel-memory' to just being true for CONFIG_CC_IS_CLANG.
> This missed the fact that not all architectures supported
> '-fsanitize=kernel-memory' at the same time. For example, SystemZ / s390
> gained support for KMSAN in clang-18 [1], so builds with clang-15
> through clang-17 can select KMSAN but they error with:
> 
> [...]

Applied, thanks!

[1/1] KMSAN: Restore dynamic check for '-fsanitize=kernel-memory'
      https://git.kernel.org/kbuild/c/a16758f0142ab

Best regards,
-- 
Nathan Chancellor <nathan@...nel.org>