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[76.210.143.223]) by smtp.gmail.com with ESMTPSA id pj14sm3597913pjb.35.2021.08.24.21.44.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 24 Aug 2021 21:45:00 -0700 (PDT) Date: Tue, 24 Aug 2021 21:45:00 -0700 (PDT) X-Google-Original-Date: Tue, 24 Aug 2021 21:44:56 PDT (-0700) Subject: Re: [PATCH] riscv: Enable Undefined Behavior Sanitizer UBSAN In-Reply-To: <20210805003059.26b03ec0@xhacker> CC: Paul Walmsley , aou@eecs.berkeley.edu, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org From: Palmer Dabbelt To: jszhang3@mail.ustc.edu.cn Message-ID: Mime-Version: 1.0 (MHng) Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 04 Aug 2021 09:30:59 PDT (-0700), jszhang3@mail.ustc.edu.cn wrote: > From: Jisheng Zhang > > 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: Jisheng Zhang > --- > arch/riscv/Kconfig | 1 + > arch/riscv/kernel/vdso/Makefile | 1 + > 2 files changed, 2 insertions(+) > > diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig > index f133ac72572f..cccb95bf8331 100644 > --- a/arch/riscv/Kconfig > +++ b/arch/riscv/Kconfig > @@ -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 > diff --git a/arch/riscv/kernel/vdso/Makefile b/arch/riscv/kernel/vdso/Makefile > index 24d936c147cd..30a5335bd317 100644 > --- a/arch/riscv/kernel/vdso/Makefile > +++ b/arch/riscv/kernel/vdso/Makefile > @@ -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 Thanks, this is on for-next.