Hi, This is a series to work around a deficiency in GCC (>=11) and Clang (<16) where the __alloc_size attribute does not apply to inlines. :( https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96503 This manifests as reduced overflow detection coverage for many allocation sites under CONFIG_FORTIFY_SOURCE=y, where the allocation size was not actually being propagated to __builtin_dynamic_object_size(). In addition to working around the issue, expand use of __alloc_size (and __realloc_size) to more places and provide KUnit tests to validate all the covered allocator APIs. -Kees Kees Cook (6): slab: Clean up SLOB vs kmalloc() definition slab: Remove special-casing of const 0 size allocations slab: Provide functional __alloc_size() hints to kmalloc_trace*() string: Add __realloc_size hint to kmemdup() driver core: Add __alloc_size hint to devm allocators kunit/fortify: Validate __alloc_size attribute results include/linux/device.h | 7 +- include/linux/fortify-string.h | 2 +- include/linux/slab.h | 36 ++--- include/linux/string.h | 2 +- lib/Makefile | 1 + lib/fortify_kunit.c | 255 +++++++++++++++++++++++++++++++++ mm/slab_common.c | 14 ++ 7 files changed, 296 insertions(+), 21 deletions(-) -- 2.34.1
