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[0/4,v5] fortify: Add Clang support

Message ID 20220202003033.704951-1-keescook@chromium.org (mailing list archive)
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Series fortify: Add Clang support | expand

Message

Kees Cook Feb. 2, 2022, 12:30 a.m. UTC 
Hi,

So, after looking at v4 at little longer I decided that it is just too
invasive. After spending time researching the primary issue that needed to
be worked around (__builtin_object_size(p, 1) not working from inlines),
I got some help from gbiv to use some Clang-specific attributes to get the
same effect.

I think the result is much less invasive, and it even lets us easily
expand size verification coverage into non-inlines if we ever want to.

Please take a look. :)

-Kees

v1: https://lore.kernel.org/linux-hardening/20210727205855.411487-61-keescook@chromium.org/
v2: https://lore.kernel.org/linux-hardening/20210818060533.3569517-64-keescook@chromium.org/
v3: https://lore.kernel.org/linux-hardening/20211213223331.135412-18-keescook@chromium.org/
v4: https://lore.kernel.org/linux-hardening/20220130182204.420775-1-keescook@chromium.org/
v5: - rewritten to use Clang attributes

Kees Cook (4):
  Compiler Attributes: Add Clang's __pass_object_size
  Compiler Attributes: Add __overloadable
  Compiler Attributes: Add __diagnose_as
  fortify: Add Clang support

 include/linux/compiler_attributes.h | 29 ++++++++++++++++
 include/linux/fortify-string.h      | 52 ++++++++++++++++++++---------
 security/Kconfig                    |  2 +-
 3 files changed, 67 insertions(+), 16 deletions(-)