linux-kernel - [PATCH V2 27/41] x86/mce: Remove stack protector from mce/core.c

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Date:   Sun, 26 Sep 2021 23:08:24 +0800
From:   Lai Jiangshan <jiangshanlai@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     Lai Jiangshan <laijs@...ux.alibaba.com>,
        Tony Luck <tony.luck@...el.com>,
        Borislav Petkov <bp@...en8.de>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, x86@...nel.org,
        "H. Peter Anvin" <hpa@...or.com>, linux-edac@...r.kernel.org
Subject: [PATCH V2 27/41] x86/mce: Remove stack protector from mce/core.c

From: Lai Jiangshan <laijs@...ux.alibaba.com>

mce/core.c is going to contain __entry_code which can not be instrumented
by stack protector.

Signed-off-by: Lai Jiangshan <laijs@...ux.alibaba.com>
---
 arch/x86/kernel/cpu/mce/Makefile | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/x86/kernel/cpu/mce/Makefile b/arch/x86/kernel/cpu/mce/Makefile
index 015856abdbb1..ce192c5344fc 100644
--- a/arch/x86/kernel/cpu/mce/Makefile
+++ b/arch/x86/kernel/cpu/mce/Makefile
@@ -1,4 +1,8 @@
 # SPDX-License-Identifier: GPL-2.0
+
+CFLAGS_REMOVE_core.o		= -fstack-protector -fstack-protector-strong
+CFLAGS_core.o			+= -fno-stack-protector
+
 obj-y				=  core.o severity.o genpool.o
 
 obj-$(CONFIG_X86_ANCIENT_MCE)	+= winchip.o p5.o
-- 
2.19.1.6.gb485710b