• Linus Torvalds's avatar
    Merge tag 'overflow-v4.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux · 28576760
    Linus Torvalds authored
    Pull overflow updates from Kees Cook:
     "This adds the new overflow checking helpers and adds them to the
      2-factor argument allocators. And this adds the saturating size
      helpers and does a treewide replacement for the struct_size() usage.
      Additionally this adds the overflow testing modules to make sure
      everything works.
    
      I'm still working on the treewide replacements for allocators with
      "simple" multiplied arguments:
    
         *alloc(a * b, ...) -> *alloc_array(a, b, ...)
    
      and
    
         *zalloc(a * b, ...) -> *calloc(a, b, ...)
    
      as well as the more complex cases, but that's separable from this
      portion of the series. I expect to have the rest sent before -rc1
      closes; there are a lot of messy cases to clean up.
    
      Summary:
    
       - Introduce arithmetic overflow test helper functions (Rasmus)
    
       - Use overflow helpers in 2-factor allocators (Kees, Rasmus)
    
       - Introduce overflow test module (Rasmus, Kees)
    
       - Introduce saturating size helper functions (Matthew, Kees)
    
       - Treewide use of struct_size() for allocators (Kees)"
    
    * tag 'overflow-v4.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
      treewide: Use struct_size() for devm_kmalloc() and friends
      treewide: Use struct_size() for vmalloc()-family
      treewide: Use struct_size() for kmalloc()-family
      device: Use overflow helpers for devm_kmalloc()
      mm: Use overflow helpers in kvmalloc()
      mm: Use overflow helpers in kmalloc_array*()
      test_overflow: Add memory allocation overflow tests
      overflow.h: Add allocation size calculation helpers
      test_overflow: Report test failures
      test_overflow: macrofy some more, do more tests for free
      lib: add runtime test of check_*_overflow functions
      compiler.h: enable builtin overflow checkers and add fallback code
    28576760
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