linux-kernel - [PATCH 0/2] Add SANITIZE_xx.o & SANITIZE and apply them to x86

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Date:   Sat,  1 Feb 2020 14:24:57 +0800
From:   Changbin Du <changbin.du@...il.com>
To:     Andrey Ryabinin <aryabinin@...tuozzo.com>
Cc:     Alexander Potapenko <glider@...gle.com>,
        Jonathan Corbet <corbet@....net>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        hpa@...or.com, x86@...nel.org, Andy Lutomirski <luto@...nel.org>,
        Masahiro Yamada <masahiroy@...nel.org>,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-kbuild@...r.kernel.org, Changbin Du <changbin.du@...il.com>
Subject: [PATCH 0/2] Add SANITIZE_xx.o & SANITIZE and apply them to x86

These two patches add SANITIZE_xx.o and SANITIZE to disable all sanitizers for
specific files, and apply them to x86 booting code.

We need to disable UBSAN for some of ealy stage code:
 o For code which could operate in one-one mapping mode. In this case,
   kernel would crash at accessing data parameter when invoking UBSAN
   handlers.
 o Since UBSAN handlers are instrumented by KASAN, so invoking UBSAN
   handlers before KASAN is initiated also is not allowed.

Changbin Du (2):
  sanitize: Add SANITIZE_xx.o and SANITIZE to disable all sanitizers for
    specific files
  x86: Disable both KASAN and UBSAN for some booting code

 Documentation/dev-tools/kasan.rst | 12 ++++++++++++
 arch/x86/boot/Makefile            |  2 +-
 arch/x86/boot/compressed/Makefile |  2 +-
 arch/x86/entry/vdso/Makefile      |  3 +--
 arch/x86/kernel/Makefile          | 10 +++++-----
 arch/x86/lib/Makefile             |  2 +-
 arch/x86/mm/Makefile              |  4 ++--
 arch/x86/realmode/Makefile        |  2 +-
 arch/x86/realmode/rm/Makefile     |  2 +-
 scripts/Makefile.lib              |  4 ++--
 10 files changed, 27 insertions(+), 16 deletions(-)

-- 
2.24.0