From 0b3e336601b82c6afa0e9cf21db9cb8793e25399 Mon Sep 17 00:00:00 2001 From: Laura Abbott Date: Fri, 20 Jul 2018 14:41:54 -0700 Subject: arm64: Add support for STACKLEAK gcc plugin This adds support for the STACKLEAK gcc plugin to arm64 by implementing stackleak_check_alloca(), based heavily on the x86 version, and adding the two helpers used by the stackleak common code: current_top_of_stack() and on_thread_stack(). The stack erasure calls are made at syscall returns. Additionally, this disables the plugin in hypervisor and EFI stub code, which are out of scope for the protection. Acked-by: Alexander Popov Reviewed-by: Mark Rutland Reviewed-by: Kees Cook Signed-off-by: Laura Abbott Signed-off-by: Will Deacon --- arch/arm64/kvm/hyp/Makefile | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'arch/arm64/kvm') diff --git a/arch/arm64/kvm/hyp/Makefile b/arch/arm64/kvm/hyp/Makefile index 4313f7475333..2fabc2dc1966 100644 --- a/arch/arm64/kvm/hyp/Makefile +++ b/arch/arm64/kvm/hyp/Makefile @@ -3,7 +3,8 @@ # Makefile for Kernel-based Virtual Machine module, HYP part # -ccflags-y += -fno-stack-protector -DDISABLE_BRANCH_PROFILING +ccflags-y += -fno-stack-protector -DDISABLE_BRANCH_PROFILING \ + $(DISABLE_STACKLEAK_PLUGIN) KVM=../../../../virt/kvm -- cgit v1.2.3