On Wed, May 31, 2023 at 1:10 AM Kees Cook <keescook@xxxxxxxxxxxx> wrote: > > On Tue, 30 May 2023 10:39:11 +0200, Alexander Potapenko wrote: > > lib/string.c is built with -ffreestanding, which prevents the compiler > > from replacing certain functions with calls to their library versions. > > > > On the other hand, this also prevents Clang and GCC from instrumenting > > calls to memcpy() when building with KASAN, KCSAN or KMSAN: > > - KASAN normally replaces memcpy() with __asan_memcpy() with the > > additional cc-param,asan-kernel-mem-intrinsic-prefix=1; > > - KCSAN and KMSAN replace memcpy() with __tsan_memcpy() and > > __msan_memcpy() by default. > > > > [...] > > Applied to for-next/hardening, thanks! > > [1/1] string: use __builtin_memcpy() in strlcpy/strlcat > https://git.kernel.org/kees/c/cfe93c8c9a7a Note that Andrew also picked it to mm-unstable
