linux-hardening - [RFC PATCH 17/17] objtool: arm64: Enable stack validation for arm64

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Date:   Wed, 20 Jan 2021 18:38:00 +0100
From:   Julien Thierry <jthierry@...hat.com>
To:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Cc:     catalin.marinas@....com, will@...nel.org, ardb@...nel.org,
        masahiroy@...nel.org, keescook@...omium.org,
        michal.lkml@...kovi.net, jpoimboe@...hat.com, peterz@...radead.org,
        mark.rutland@....com, broonie@...nel.org,
        linux-efi@...r.kernel.org, linux-hardening@...r.kernel.org,
        Raphael Gault <raphael.gault@....com>,
        Julien Thierry <jthierry@...hat.com>
Subject: [RFC PATCH 17/17] objtool: arm64: Enable stack validation for arm64

From: Raphael Gault <raphael.gault@....com>

Add build option to run stack validation at compile time.

Signed-off-by: Raphael Gault <raphael.gault@....com>
Signed-off-by: Julien Thierry <jthierry@...hat.com>
---
 arch/arm64/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 93a320cc8e03..3f297d61b56b 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -185,6 +185,7 @@ config ARM64
 	select MMU_GATHER_RCU_TABLE_FREE
 	select HAVE_RSEQ
 	select HAVE_STACKPROTECTOR
+	select HAVE_STACK_VALIDATION if CC_IS_GCC
 	select HAVE_SYSCALL_TRACEPOINTS
 	select HAVE_KPROBES
 	select HAVE_KRETPROBES
-- 
2.25.4