Hi, These patches 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(). The problem was in two halves: the trace wrapper (now fixed in -next), and const-0 special-casing (covered here). Thanks, -Kees v2: - drop trace wrapper refactoring -- handled differently now (vbabka) - drop kunit/fortify test patch since it depends on other changes - rebase v1: https://lore.kernel.org/all/20221101222520.never.109-kees@xxxxxxxxxx Kees Cook (2): slab: Clean up SLOB vs kmalloc() definition slab: Remove special-casing of const 0 size allocations include/linux/slab.h | 28 ++++++++++++++-------------- 1 file changed, 14 insertions(+), 14 deletions(-) -- 2.34.1
