The vDSO executes in userspace, so the kernel's UBSAN should not instrument it. Solves these kind of build errors:
loongarch64-linux-ld: arch/loongarch/vdso/vgettimeofday.o: in function `vdso_shift_ns': lib/vdso/gettimeofday.c:23:(.text+0x3f8): undefined reference to `__ubsan_handle_shift_out_of_bounds' Reported-by: kernel test robot <l...@intel.com> Closes: https://lore.kernel.org/oe-kbuild-all/202401310530.lzhcj1zl-...@intel.com/ Cc: Huacai Chen <chenhua...@kernel.org> Cc: WANG Xuerui <ker...@xen0n.name> Cc: Vincenzo Frascino <vincenzo.frasc...@arm.com> Cc: Nathan Chancellor <nat...@kernel.org> Cc: Masahiro Yamada <masahi...@kernel.org> Cc: Fangrui Song <mask...@google.com> Cc: loonga...@lists.linux.dev Signed-off-by: Kees Cook <keesc...@chromium.org> --- arch/loongarch/vdso/Makefile | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/loongarch/vdso/Makefile b/arch/loongarch/vdso/Makefile index c74c9921304f..f597cd08a96b 100644 --- a/arch/loongarch/vdso/Makefile +++ b/arch/loongarch/vdso/Makefile @@ -2,6 +2,7 @@ # Objects to go into the VDSO. KASAN_SANITIZE := n +UBSAN_SANITIZE := n KCOV_INSTRUMENT := n # Include the generic Makefile to check the built vdso. -- 2.34.1
