[GIT PULL] hardening updates for v6.14-rc1 (fix1)

[Kees Cook]

Hi Linus,

Please pull this hardening fix for v6.14-rc1. This is a fix for the soon
to be released GCC 15 which has regressed its initialization of unions
when performing explicit initialization (i.e. a general problem, not
specifically a hardening problem; we're just carrying the fix). Details
in the final patch, Acked by Masahiro, with updated selftests to validate
the fix.

Thanks!

-Kees

The following changes since commit a9a5e0bdc5a77a7c662ad4be0ad661f0b0d5e99d:

  hardening: Document INIT_STACK_ALL_PATTERN behavior with GCC (2025-01-08 14:17:33 -0800)

are available in the Git repository at:

  https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git tags/hardening-v6.14-rc1-fix1

for you to fetch changes up to dce4aab8441d285b9a78b33753e0bf583c1320ee:

  kbuild: Use -fzero-init-padding-bits=all (2025-01-30 08:48:34 -0800)

----------------------------------------------------------------
hardening updates for v6.14-rc1-fix1

- Fix regression in GCC 15's initialization of union members

----------------------------------------------------------------
Kees Cook (3):
      stackinit: Add old-style zero-init syntax to struct tests
      stackinit: Add union initialization to selftests
      kbuild: Use -fzero-init-padding-bits=all

 lib/stackinit_kunit.c      | 106 +++++++++++++++++++++++++++++++++++++++++++++
 scripts/Makefile.extrawarn |   3 ++
 2 files changed, 109 insertions(+)

-- 
Kees Cook