From: Kees Cook <keescook@xxxxxxxxxxxx> [ Upstream commit cca5efe77a6a2d02b3da4960f799fa233e460ab1 ] 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 <lkp@xxxxxxxxx> Closes: https://lore.kernel.org/oe-kbuild-all/202401310530.lZHCj1Zl-lkp@xxxxxxxxx/ Cc: Huacai Chen <chenhuacai@xxxxxxxxxx> Cc: WANG Xuerui <kernel@xxxxxxxxxx> Cc: Vincenzo Frascino <vincenzo.frascino@xxxxxxx> Cc: Nathan Chancellor <nathan@xxxxxxxxxx> Cc: Masahiro Yamada <masahiroy@xxxxxxxxxx> Cc: Fangrui Song <maskray@xxxxxxxxxx> Cc: loongarch@xxxxxxxxxxxxxxx Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx> Signed-off-by: Huacai Chen <chenhuacai@xxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- 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. -- 2.43.0
