[0/3] ubsan/overflow: Enable pattern exclusions

Message

Kees Cook March 7, 2025, 4:19 a.m. UTC

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