[PATCH RFC 0/4] stackleak: Support Clang stack depth tracking

[Kees Cook]

Hi,

As part of looking at what GCC plugins could be replaced with Clang
implementations, this series uses the recently proposed stack depth
tracking callback in Clang[1] to implement the stackleak feature.

-Kees

[1] https://github.com/llvm/llvm-project/pull/138323

Kees Cook (4):
  stackleak: Rename CONFIG_GCC_PLUGIN_STACKLEAK to CONFIG_STACKLEAK
  stackleak: Rename stackleak_track_stack to __sanitizer_cov_stack_depth
  stackleak: Split STACKLEAK_CFLAGS from GCC_PLUGINS_CFLAGS
  stackleak: Support Clang stack depth tracking

 Documentation/admin-guide/sysctl/kernel.rst |  2 +-
 Documentation/security/self-protection.rst  |  2 +-
 arch/arm/boot/compressed/Makefile           |  2 +-
 arch/arm/kernel/entry-common.S              |  2 +-
 arch/arm/vdso/Makefile                      |  2 +-
 arch/arm64/kernel/entry.S                   |  2 +-
 arch/arm64/kernel/pi/Makefile               |  2 +-
 arch/arm64/kernel/vdso/Makefile             |  1 +
 arch/arm64/kvm/hyp/nvhe/Makefile            |  2 +-
 arch/riscv/kernel/entry.S                   |  2 +-
 arch/riscv/kernel/pi/Makefile               |  2 +-
 arch/riscv/purgatory/Makefile               |  2 +-
 arch/s390/kernel/entry.S                    |  2 +-
 arch/sparc/vdso/Makefile                    |  3 +-
 arch/x86/entry/calling.h                    |  4 +-
 arch/x86/entry/vdso/Makefile                |  3 +-
 arch/x86/include/asm/init.h                 |  2 +-
 arch/x86/purgatory/Makefile                 |  2 +-
 drivers/firmware/efi/libstub/Makefile       |  6 +--
 drivers/misc/lkdtm/stackleak.c              |  8 ++--
 include/linux/init.h                        |  4 +-
 include/linux/sched.h                       |  4 +-
 include/linux/stackleak.h                   |  6 +--
 kernel/Makefile                             |  4 +-
 kernel/stackleak.c                          |  4 +-
 lib/Makefile                                |  2 +-
 scripts/Makefile.gcc-plugins                | 13 +++---
 scripts/Makefile.ubsan                      | 12 +++++
 scripts/gcc-plugins/stackleak_plugin.c      | 52 ++++++++++-----------
 security/Kconfig.hardening                  | 25 ++++++----
 tools/objtool/check.c                       |  2 +-
 tools/testing/selftests/lkdtm/config        |  2 +-
 32 files changed, 105 insertions(+), 78 deletions(-)

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2.34.1