Messages in this thread Patch in this message | | | From | Kefeng Wang <> | Subject | [PATCH] arm64: Enable KCSAN | Date | Fri, 26 Nov 2021 16:00:08 +0800 |
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This patch enables KCSAN for arm64, with updates to build rules to not use KCSAN for several incompatible compilation units.
Tested selftest and kcsan_test, and all passed.
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com> --- Tested on Qemu with clang 13, based on 5.16-rc2.
[ 0.221518] kcsan: enabled early [ 0.222422] kcsan: strict mode configured ... [ 5.839223] kcsan: selftest: 3/3 tests passed ... [ 517.895102] # kcsan: pass:24 fail:0 skip:0 total:24 [ 517.896393] # Totals: pass:168 fail:0 skip:0 total:168 [ 517.897502] ok 1 - kcsan
arch/arm64/Kconfig | 1 + arch/arm64/kernel/vdso/Makefile | 1 + arch/arm64/kvm/hyp/nvhe/Makefile | 1 + 3 files changed, 3 insertions(+)
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 4ff73299f8a9..0ac90875f71d 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -150,6 +150,7 @@ config ARM64 select HAVE_ARCH_KASAN_VMALLOC if HAVE_ARCH_KASAN select HAVE_ARCH_KASAN_SW_TAGS if HAVE_ARCH_KASAN select HAVE_ARCH_KASAN_HW_TAGS if (HAVE_ARCH_KASAN && ARM64_MTE) + select HAVE_ARCH_KCSAN select HAVE_ARCH_KFENCE select HAVE_ARCH_KGDB select HAVE_ARCH_MMAP_RND_BITS diff --git a/arch/arm64/kernel/vdso/Makefile b/arch/arm64/kernel/vdso/Makefile index 700767dfd221..60813497a381 100644 --- a/arch/arm64/kernel/vdso/Makefile +++ b/arch/arm64/kernel/vdso/Makefile @@ -32,6 +32,7 @@ ccflags-y += -DDISABLE_BRANCH_PROFILING -DBUILD_VDSO CFLAGS_REMOVE_vgettimeofday.o = $(CC_FLAGS_FTRACE) -Os $(CC_FLAGS_SCS) $(GCC_PLUGINS_CFLAGS) \ $(CC_FLAGS_LTO) KASAN_SANITIZE := n +KCSAN_SANITIZE := n UBSAN_SANITIZE := n OBJECT_FILES_NON_STANDARD := y KCOV_INSTRUMENT := n diff --git a/arch/arm64/kvm/hyp/nvhe/Makefile b/arch/arm64/kvm/hyp/nvhe/Makefile index c3c11974fa3b..24b2c2425b38 100644 --- a/arch/arm64/kvm/hyp/nvhe/Makefile +++ b/arch/arm64/kvm/hyp/nvhe/Makefile @@ -89,6 +89,7 @@ KBUILD_CFLAGS := $(filter-out $(CC_FLAGS_FTRACE) $(CC_FLAGS_SCS) $(CC_FLAGS_CFI) # cause crashes. Just disable it. GCOV_PROFILE := n KASAN_SANITIZE := n +KCSAN_SANITIZE := n UBSAN_SANITIZE := n KCOV_INSTRUMENT := n -- 2.26.2
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