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

[Changbin Du]

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(-)

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2.24.0