From: Abbott Liu <liuwenliang@huawei.com>
To: <aryabinin@virtuozzo.com>, <dvyukov@google.com>, <corbet@lwn.net>,
<linux@armlinux.org.uk>, <christoffer.dall@linaro.org>,
<marc.zyngier@arm.com>, <kstewart@linuxfoundation.org>,
<gregkh@linuxfoundation.org>, <f.fainelli@gmail.com>,
<liuwenliang@huawei.com>, <akpm@linux-foundation.org>,
<linux@rasmusvillemoes.dk>, <mawilcox@microsoft.com>,
<pombredanne@nexb.com>, <ard.biesheuvel@linaro.org>,
<vladimir.murzin@arm.com>, <alexander.levin@verizon.com>,
<nicolas.pitre@linaro.org>, <tglx@linutronix.de>,
<thgarnie@google.com>, <dhowells@redhat.com>,
<keescook@chromium.org>, <arnd@arndb.de>, <geert@linux-m68k.org>,
<tixy@linaro.org>, <julien.thierry@arm.com>,
<mark.rutland@arm.com>, <james.morse@arm.com>,
<zhichao.huang@linaro.org>, <jinb.park7@gmail.com>,
<labbott@redhat.com>, <philip@cog.systems>,
<grygorii.strashko@linaro.org>, <catalin.marinas@arm.com>,
<opendmb@gmail.com>, <kirill.shutemov@linux.intel.com>,
<kasan-dev@googlegroups.com>, <linux-doc@vger.kernel.org>,
<linux-kernel@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<kvmarm@lists.cs.columbia.edu>, <linux-mm@kvack.org>
Subject: [PATCH v3 2/6] Disable instrumentation for some code
Date: Mon, 2 Apr 2018 20:04:36 +0800 [thread overview]
Message-ID: <20180402120440.31900-3-liuwenliang@huawei.com> (raw)
In-Reply-To: <20180402120440.31900-1-liuwenliang@huawei.com>
From: Andrey Ryabinin <a.ryabinin@samsung.com>
Disable instrumentation for arch/arm/boot/compressed/*
,arch/arm/kvm/hyp/* and arch/arm/vdso/* because those
code won't linkd with kernel image.
Disable kasan check in the function unwind_pop_register
because it doesn't matter that kasan checks failed when
unwind_pop_register read stack memory of task.
Reviewed-by: Russell King - ARM Linux <linux@armlinux.org.uk>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Tested-by: Joel Stanley <joel@jms.id.au>
Tested-by: Florian Fainelli <f.fainelli@gmail.com>
Tested-by: Abbott Liu <liuwenliang@huawei.com>
Signed-off-by: Abbott Liu <liuwenliang@huawei.com>
---
arch/arm/boot/compressed/Makefile | 1 +
arch/arm/kernel/unwind.c | 3 ++-
arch/arm/kvm/hyp/Makefile | 4 ++++
arch/arm/vdso/Makefile | 2 ++
4 files changed, 9 insertions(+), 1 deletion(-)
diff --git a/arch/arm/boot/compressed/Makefile b/arch/arm/boot/compressed/Makefile
index 45a6b9b..966103e 100644
--- a/arch/arm/boot/compressed/Makefile
+++ b/arch/arm/boot/compressed/Makefile
@@ -24,6 +24,7 @@ OBJS += hyp-stub.o
endif
GCOV_PROFILE := n
+KASAN_SANITIZE := n
#
# Architecture dependencies
diff --git a/arch/arm/kernel/unwind.c b/arch/arm/kernel/unwind.c
index 0bee233..2e55c7d 100644
--- a/arch/arm/kernel/unwind.c
+++ b/arch/arm/kernel/unwind.c
@@ -249,7 +249,8 @@ static int unwind_pop_register(struct unwind_ctrl_block *ctrl,
if (*vsp >= (unsigned long *)ctrl->sp_high)
return -URC_FAILURE;
- ctrl->vrs[reg] = *(*vsp)++;
+ ctrl->vrs[reg] = READ_ONCE_NOCHECK(*(*vsp));
+ (*vsp)++;
return URC_OK;
}
diff --git a/arch/arm/kvm/hyp/Makefile b/arch/arm/kvm/hyp/Makefile
index 63d6b40..0a8b500 100644
--- a/arch/arm/kvm/hyp/Makefile
+++ b/arch/arm/kvm/hyp/Makefile
@@ -24,3 +24,7 @@ obj-$(CONFIG_KVM_ARM_HOST) += hyp-entry.o
obj-$(CONFIG_KVM_ARM_HOST) += switch.o
CFLAGS_switch.o += $(CFLAGS_ARMV7VE)
obj-$(CONFIG_KVM_ARM_HOST) += s2-setup.o
+
+GCOV_PROFILE := n
+KASAN_SANITIZE := n
+UBSAN_SANITIZE := n
diff --git a/arch/arm/vdso/Makefile b/arch/arm/vdso/Makefile
index bb411821..87abbb7 100644
--- a/arch/arm/vdso/Makefile
+++ b/arch/arm/vdso/Makefile
@@ -30,6 +30,8 @@ CFLAGS_vgettimeofday.o = -O2
# Disable gcov profiling for VDSO code
GCOV_PROFILE := n
+KASAN_SANITIZE := n
+
# Force dependency
$(obj)/vdso.o : $(obj)/vdso.so
--
2.9.0
next prev parent reply other threads:[~2018-04-02 12:04 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-02 12:04 [PATCH v3 0/6] KASan for arm Abbott Liu
2018-04-02 12:04 ` [PATCH v3 1/6] Add TTBR operator for kasan_init Abbott Liu
2018-04-02 12:04 ` Abbott Liu [this message]
2018-04-03 11:30 ` [PATCH v3 2/6] Disable instrumentation for some code Marc Zyngier
2018-04-03 11:38 ` Russell King - ARM Linux
2018-04-02 12:04 ` [PATCH v3 3/6] Replace memory function for kasan Abbott Liu
2018-04-02 12:04 ` [PATCH v3 4/6] Define the virtual space of KASan's shadow region Abbott Liu
2018-04-02 12:04 ` [PATCH v3 5/6] Initialize the mapping of KASan shadow memory Abbott Liu
2018-04-02 18:08 ` Nicolas Pitre
2018-04-02 18:15 ` Russell King - ARM Linux
2018-04-02 18:20 ` Nicolas Pitre
2018-04-02 12:04 ` [PATCH v3 6/6] Enable KASan for arm Abbott Liu
2018-04-08 1:38 [PATCH v3 2/6] Disable instrumentation for some code Liuwenliang (Abbott Liu)
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