Patch "arm64: KVM: Do not use stack-protector to compile EL2 code" has been added to the 4.9-stable tree

This is a note to let you know that I've just added the patch titled

arm64: KVM: Do not use stack-protector to compile EL2 code

to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
arm64-kvm-do-not-use-stack-protector-to-compile-el2-code.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Marc Zyngier <[email protected]>
Date: Tue, 2 May 2017 14:30:37 +0100
Subject: arm64: KVM: Do not use stack-protector to compile EL2 code

From: Marc Zyngier <[email protected]>

commit cde13b5dad60471886a3bccb4f4134c647c4a9dc upstream.

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 instrumentation.

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

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

@@ -2,6 +2,8 @@
 # Makefile for Kernel-based Virtual Machine module, HYP part
 #
 
+ccflags-y += -fno-stack-protector
+
 KVM=../../../../virt/kvm
 
 obj-$(CONFIG_KVM_ARM_HOST) += $(KVM)/arm/hyp/vgic-v2-sr.o

Patches currently in stable-queue which might be from [email protected] are

queue-4.9/arm64-kvm-do-not-use-stack-protector-to-compile-el2-code.patch queue-4.9/arm-kvm-do-not-use-stack-protector-to-compile-hyp-code.patch queue-4.9/kvm-arm-arm64-vgic-v3-do-not-use-active-pending-state-for-a-hw-interrupt.patch queue-4.9/kvm-arm-arm64-vgic-v2-do-not-use-active-pending-state-for-a-hw-interrupt.patch