From nobody Sat Feb 7 15:40:28 2026 Received: from mail-ej1-f42.google.com (mail-ej1-f42.google.com [209.85.218.42]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3E4F323C39A for ; Thu, 27 Feb 2025 14:07:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.218.42 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740665241; cv=none; b=lqaodfVttonu/fsfRdSGBfbIGfZMcY3maaM5m6/D3nXvp7BVlzBUEZ3LzOZ7DXMbAqh/aYxCizHpjFdxaLrflIXsTKA/qmPljdjFfJr1Ih+qV/uAUI2aiBhjdsclS/OhOJEXJVaCQUyXxL97Cf3kI/620xX2kOa5XdvqYCawCs4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740665241; c=relaxed/simple; bh=XAN1YWH9D7fhIC80lM9v65r9S5cnQUbTdkwcS0usi4w=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=BFWREciRj1hrpreKIUZMO56czzU13eZJydspttggYJ03aF3RSIPYHeSlILXK4o5e73ZEbMnXSYm7rvuWOUJZjERtNtNqahJE8muGlcLk5dtIkNUJwrKthuomrtpxxWEJI7yrKZenYLgQ1/ivK8VzOx+quGaVTzc7h7VFGgQ3ook= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=d+kjX8wW; arc=none smtp.client-ip=209.85.218.42 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="d+kjX8wW" Received: by mail-ej1-f42.google.com with SMTP id a640c23a62f3a-ab744d5e567so178435266b.1 for ; Thu, 27 Feb 2025 06:07:19 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1740665238; x=1741270038; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=0gwIGXInW+F7WA8WdnAv9e0DBkovllqoBbjCqtJC5/A=; b=d+kjX8wW90hRLQu6ukkeqlcEswKP5/GzPI1V1atHvI8gITb48jhNPGV9BlYua6fXQU hVAEKcql3s9mQ5DTqKgg6Z2CDoZCAXzc/YB91sIL4ULk4hcczEeDrPVqj8n3uzFgs4/u 0g8bHzqeumh0RLau9rSFTWz0hNZbgb+pVolB4am9BL20Fqf3yWsicA0AFdRrEFLxHDv4 Z6Hc0NpbfLSglJDBBmQNgtkaMmTb609cNy8no+Zv1FfVtSIONmQFdTUlPbJpjWCx4c07 V7HBMdzVerUHJWEdOMUqaQSTE2hvAw7TpVi36Qe6jySAoeBj9SVf2RfAkNd/ezZINpxl UJkw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1740665238; x=1741270038; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=0gwIGXInW+F7WA8WdnAv9e0DBkovllqoBbjCqtJC5/A=; b=e8c0EXQxEEUwiuD/f+ow85mcRhJ8z/pnenCyVNyCGl6dg9m+pF+lXdLcez5sjeZynZ RlzINfqx7SkV/uN5EvQQV00CiuJvkUGvQTXDZpZ9iUrNvjT/rOfG/GnnUE201VxhrMJi ACD/0XaYxWLuWOLyBXGoxmnXdPLfFG3sa8DHkBhAYyj0Yj++IQl5yL0bXyB6SlJjYjpy vtCLfyhIOOz/WRnqtrq6tWo5C/RY+OtmJ+6o1YAQS+mkFQjlWZt8YgTmgALd8yDFWhhf stkOiDt7nCq0TA8cAQVuiBwvApA9i6IZBQG/9zc6mPWKZhjDjlyRJJy627yjcBHgkToz fp5A== X-Forwarded-Encrypted: i=1; AJvYcCXZtK8kLP1PtbcZvIY1jdbg5LtHcnEBx3JzkGEfL8M1tiXD1zKc40flij5+ZdOnruc+cWiawA7UELCJ5H8=@vger.kernel.org X-Gm-Message-State: AOJu0Yw+9h/5i2DZZBtl3gcFftaIcqfuHdU3cAxqLoX5XQNzLACYBwo1 Br4Ozm0gnRCwTMF4hpzWjMqqldsEgAMvBZZmSmRWNZdSkVBjTQKw X-Gm-Gg: ASbGncsIapYBb67oCzUM9B7uRnVaDrSt9ArrFjlEYE1W+FrnG6y3d4roqpIQlwmlhdK fzV12WAJp8s5go0mymyZXNLk4ZRaNnNS0/voiyKrOLpRB3VuVW5pwbB6gs9tvLq+nRXV/0XGQSm ULz5IhoZrsFH3SeR0oZq+HHl9beo4otBhSWvKXJ+b7ZdueNIyVEDfclG9LSUqZG8GEFbYosOJlC fiZxYYfcpxUxgq5Fr9XtWd6wXK7wmg8ewE5Z5V/N0kZwQrsSWWSqvqSX/jn0StzCD1Y59YwsJZh E6hi5UeOGhgqxsdzzg== X-Google-Smtp-Source: AGHT+IHj01UdUdouLpLrpg/EF9SJ2fYdEnZ4H9STAdnJbEjkOTio6fzxgP00IHhClcTagCh6QcsNjA== X-Received: by 2002:a17:906:5f92:b0:ab7:b9b5:60ff with SMTP id a640c23a62f3a-abf05de37admr438714866b.2.1740665238060; Thu, 27 Feb 2025 06:07:18 -0800 (PST) Received: from fedora.. ([193.77.86.199]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-abf0c0b9ac0sm128481866b.5.2025.02.27.06.07.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Feb 2025 06:07:17 -0800 (PST) From: Uros Bizjak To: x86@kernel.org, linux-kernel@vger.kernel.org Cc: Uros Bizjak , Matt Fleming , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , "H. Peter Anvin" Subject: [PATCH] x86/percpu: Disable named address spaces for UBSAN_BOOL with KASAN for GCC < 14.2 Date: Thu, 27 Feb 2025 15:06:58 +0100 Message-ID: <20250227140715.2276353-1-ubizjak@gmail.com> X-Mailer: git-send-email 2.48.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" GCC < 14.2 does not correctly propagate address space qualifiers with -fsanitize=3Dbool,enum. Together with address sanitizer then causes that load to be sanitized. Disable named address spaces for GCC < 14.2 when both, UBSAN_BOOL and KASAN are enabled. Reported-by: Matt Fleming Closes: https://lore.kernel.org/lkml/20241213190119.3449103-1-matt@readmodw= rite.com/ Signed-off-by: Uros Bizjak Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Borislav Petkov Cc: Dave Hansen Cc: "H. Peter Anvin" --- arch/x86/Kconfig | 20 +++++++++++--------- 1 file changed, 11 insertions(+), 9 deletions(-) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 95ea2b4b95db..60c2a16c7801 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -2369,18 +2369,20 @@ config CC_HAS_NAMED_AS def_bool $(success,echo 'int __seg_fs fs; int __seg_gs gs;' | $(CC) -x c = - -S -o /dev/null) depends on CC_IS_GCC =20 +# +# -fsanitize=3Dkernel-address (KASAN) and -fsanitize=3Dthread (KCSAN) +# are incompatible with named address spaces with GCC < 13.3 +# (see GCC PR sanitizer/111736 and also PR sanitizer/115172). +# + config CC_HAS_NAMED_AS_FIXED_SANITIZERS - def_bool CC_IS_GCC && GCC_VERSION >=3D 130300 + def_bool y + depends on !(KASAN || KCSAN) || GCC_VERSION >=3D 130300 + depends on !(UBSAN_BOOL && KASAN) || GCC_VERSION >=3D 140200 =20 config USE_X86_SEG_SUPPORT - def_bool y - depends on CC_HAS_NAMED_AS - # - # -fsanitize=3Dkernel-address (KASAN) and -fsanitize=3Dthread - # (KCSAN) are incompatible with named address spaces with - # GCC < 13.3 - see GCC PR sanitizer/111736. - # - depends on !(KASAN || KCSAN) || CC_HAS_NAMED_AS_FIXED_SANITIZERS + def_bool CC_HAS_NAMED_AS + depends on CC_HAS_NAMED_AS_FIXED_SANITIZERS =20 config CC_HAS_SLS def_bool $(cc-option,-mharden-sls=3Dall) --=20 2.48.1