Unverified Commit 8341dcfb authored by Jisheng Zhang's avatar Jisheng Zhang Committed by Palmer Dabbelt
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riscv: Enable Undefined Behavior Sanitizer UBSAN 



Select ARCH_HAS_UBSAN_SANITIZE_ALL in order to allow the user to
enable CONFIG_UBSAN_SANITIZE_ALL and instrument the entire kernel for
ubsan checks.

VDSO is excluded because its build doesn't include the
__ubsan_handle_*() functions from lib/ubsan.c, and the VDSO has no
sane way to report errors even if it has definitions of these functions.

Passed lib/test_ubsan.c test.

Signed-off-by: default avatarJisheng Zhang <jszhang@kernel.org>
Signed-off-by: default avatarPalmer Dabbelt <palmerdabbelt@google.com>
parent 7f85b04b

arch/riscv/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -28,6 +28,7 @@ config RISCV 
	select ARCH_HAS_STRICT_KERNEL_RWX if MMU && !XIP_KERNEL

	select ARCH_HAS_STRICT_MODULE_RWX if MMU && !XIP_KERNEL

	select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST

	select ARCH_HAS_UBSAN_SANITIZE_ALL

	select ARCH_OPTIONAL_KERNEL_RWX if ARCH_HAS_STRICT_KERNEL_RWX

	select ARCH_OPTIONAL_KERNEL_RWX_DEFAULT

	select ARCH_STACKWALK

arch/riscv/kernel/vdso/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -36,6 +36,7 @@ CFLAGS_REMOVE_vgettimeofday.o = $(CC_FLAGS_FTRACE) -Os 
GCOV_PROFILE := n

KCOV_INSTRUMENT := n

KASAN_SANITIZE := n

UBSAN_SANITIZE := n



# Force dependency

$(obj)/vdso.o: $(obj)/vdso.so