hardening updates for 6.10-rc1

- selftests: Add str*cmp tests (Ivan Orlov)

- __counted_by: provide UAPI for _le/_be variants (Erick Archer)

- Various strncpy deprecation refactors (Justin Stitt)

- stackleak: Use a copy of soon-to-be-const sysctl table (Thomas Weißschuh)

- UBSAN: Work around i386 -regparm=3 bug with Clang prior to version 19

- Provide helper to deal with non-NUL-terminated string copying

- SCSI: Fix older string copying bugs (with new helper)

- selftests: Consolidate string helper behavioral tests

- selftests: add memcpy() fortify tests

- string: Add additional __realloc_size() annotations for "dup" helpers

- LKDTM: Fix KCFI+rodata+objtool confusion

- hardening.config: Enable KCFI
uapi: stddef.h: Provide UAPI macros for __counted_by_{le, be}

This commit can be considered an addition to commit ca7e324e8ad3
("compiler_types: add Endianness-dependent __counted_by_{le,be}") [1].

In the commit referenced above the __counted_by_{le,be}() attributes
were defined based on platform's endianness with the goal to that the
structures contain flexible arrays at the end, and the counter for,
can be annotated with these attributes.

So, this commit only provide UAPI macros for UAPI structs that will
gain annotations for __counted_by_{le, be} attributes. And it is the
previous step to be able to use these attributes in UAPI.

Link: https://lore.kernel.org/r/20240327142241.1745989-2-aleksander.lobakin@intel.com
Suggested-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Erick Archer <erick.archer@outlook.com>
Link: https://lore.kernel.org/r/AS8PR02MB72372E45071E8821C07236F78BE42@AS8PR02MB7237.eurprd02.prod.outlook.com
Fixes: ca7e324e8ad3 ("compiler_types: add Endianness-dependent __counted_by_{le,be}")
Signed-off-by: Kees Cook <keescook@chromium.org>
1 file changed