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From: Kefeng Wang <wangkefeng.wang@huawei.com>
To: Marco Elver <elver@google.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-kernel@vger.kernel.org>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Subject: [PATCH] arm64: Enable KCSAN
Date: Fri, 26 Nov 2021 16:00:08 +0800 [thread overview]
Message-ID: <20211126080008.77202-1-wangkefeng.wang@huawei.com> (raw)
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
next reply other threads:[~2021-11-26 7:51 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-26 8:00 Kefeng Wang [this message]
2021-11-26 10:39 ` Marco Elver
2021-11-26 12:02 ` Kefeng Wang
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