[PULL,02/13] arm64: KVM: Do not use stack-protector to compile EL2 code

Message ID 20170518094722.9926-3-cdall@linaro.org
State New
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  • Untitled series #1481
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Commit Message

Christoffer Dall May 18, 2017, 9:47 a.m.
From: Marc Zyngier <marc.zyngier@arm.com>

We like living dangerously. Nothing explicitely forbids stack-protector
to be used in the EL2 code, while distributions routinely compile their
kernel with it. We're just lucky that no code actually triggers the

Let's not try our luck for much longer, and disable stack-protector
for code living at EL2.

Cc: stable@vger.kernel.org
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>

Acked-by: Christoffer Dall <cdall@linaro.org>

Signed-off-by: Christoffer Dall <cdall@linaro.org>

 arch/arm64/kvm/hyp/Makefile | 2 ++
 1 file changed, 2 insertions(+)



diff --git a/arch/arm64/kvm/hyp/Makefile b/arch/arm64/kvm/hyp/Makefile
index aaf42ae..14c4e3b 100644
--- a/arch/arm64/kvm/hyp/Makefile
+++ b/arch/arm64/kvm/hyp/Makefile
@@ -2,6 +2,8 @@ 
 # Makefile for Kernel-based Virtual Machine module, HYP part
+ccflags-y += -fno-stack-protector
 obj-$(CONFIG_KVM_ARM_HOST) += $(KVM)/arm/hyp/vgic-v2-sr.o