From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marc Zyngier Subject: [PATCH 2/5] arm: KVM: Do not use stack-protector to compile HYP code Date: Tue, 2 May 2017 14:30:38 +0100 Message-ID: <20170502133041.10980-3-marc.zyngier@arm.com> References: <20170502133041.10980-1-marc.zyngier@arm.com> Cc: kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org To: Christoffer Dall Return-path: Received: from foss.arm.com ([217.140.101.70]:44434 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750936AbdEBNaz (ORCPT ); Tue, 2 May 2017 09:30:55 -0400 In-Reply-To: <20170502133041.10980-1-marc.zyngier@arm.com> Sender: kvm-owner@vger.kernel.org List-ID: We like living dangerously. Nothing explicitely forbids stack-protector to be used in the HYP 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 HYP. Cc: stable@vger.kernel.org Signed-off-by: Marc Zyngier --- arch/arm/kvm/hyp/Makefile | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm/kvm/hyp/Makefile b/arch/arm/kvm/hyp/Makefile index 3023bb530edf..8679405b0b2b 100644 --- a/arch/arm/kvm/hyp/Makefile +++ b/arch/arm/kvm/hyp/Makefile @@ -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 -- 2.11.0