From: Abbott Liu <liuwenliang@huawei.com>
To: linux@armlinux.org.uk, aryabinin@virtuozzo.com,
marc.zyngier@arm.com, kstewart@linuxfoundation.org,
gregkh@linuxfoundation.org, f.fainelli@gmail.com,
liuwenliang@huawei.com, akpm@linux-foundation.org,
afzal.mohd.ma@gmail.com, alexander.levin@verizon.com
Cc: glider@google.com, dvyukov@google.com,
christoffer.dall@linaro.org, linux@rasmusvillemoes.dk,
mawilcox@microsoft.com, pombredanne@nexb.com,
ard.biesheuvel@linaro.org, vladimir.murzin@arm.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,
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,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com,
kvmarm@lists.cs.columbia.edu, linux-mm@kvack.org
Subject: [PATCH 3/7] Disable instrumentation for some code
Date: Sun, 18 Mar 2018 20:53:38 +0800 [thread overview]
Message-ID: <20180318125342.4278-4-liuwenliang@huawei.com> (raw)
In-Reply-To: <20180318125342.4278-1-liuwenliang@huawei.com>
From: Andrey Ryabinin <a.ryabinin@samsung.com>
Disable instrumentation for arch/arm/boot/compressed/*
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>
Tested-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Abbott Liu <liuwenliang@huawei.com>
---
arch/arm/boot/compressed/Makefile | 1 +
arch/arm/kernel/unwind.c | 3 ++-
arch/arm/vdso/Makefile | 2 ++
3 files changed, 5 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/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:[~2018-03-18 13:14 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-18 12:53 [PATCH v2 0/7] KASan for arm Abbott Liu
2018-03-18 12:53 ` [PATCH 1/7] 2 1-byte checks more safer for memory_is_poisoned_16 Abbott Liu
2018-03-18 13:21 ` Russell King - ARM Linux
2018-03-18 12:53 ` [PATCH 2/7] Add TTBR operator for kasan_init Abbott Liu
2018-03-18 12:53 ` Abbott Liu [this message]
2018-03-19 8:38 ` [PATCH 3/7] Disable instrumentation for some code Marc Zyngier
2018-03-18 12:53 ` [PATCH 4/7] Replace memory function for kasan Abbott Liu
2018-03-18 12:53 ` [PATCH 5/7] Define the virtual space of KASan's shadow region Abbott Liu
2018-03-18 12:53 ` [PATCH 6/7] Initialize the mapping of KASan shadow memory Abbott Liu
2018-03-18 12:53 ` [PATCH 7/7] Enable KASan for arm Abbott Liu
2018-03-19 20:43 ` kbuild test robot
2018-03-18 19:13 ` [PATCH v2 0/7] " Florian Fainelli
2018-03-19 18:29 ` Florian Fainelli
2018-03-25 23:58 ` Joel Stanley
-- strict thread matches above, loose matches on Subject: below --
2018-03-24 11:39 [PATCH 3/7] Disable instrumentation for some code Liuwenliang (Abbott Liu)
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