Merge tag 'overflow-v5.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux

Pull overflow updates from Kees Cook:
 "These changes come in roughly two halves: support of Gustavo A. R.
  Silva's struct_size() work via additional helpers for catching
  overflow allocation size calculations, and conversions of selftests to
  KUnit (which includes some tweaks for UML + Clang):

   - Convert overflow selftest to KUnit

   - Convert stackinit selftest to KUnit

   - Implement size_t saturating arithmetic helpers

   - Allow struct_size() to be used in initializers"

* tag 'overflow-v5.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  lib: stackinit: Convert to KUnit
  um: Allow builds with Clang
  lib: overflow: Convert to Kunit
  overflow: Provide constant expression struct_size
  overflow: Implement size_t saturating arithmetic helpers
  test_overflow: Regularize test reporting output