From 2f78c73f78c39dabc5c44ad8dd61fd6ec65636d6 Mon Sep 17 00:00:00 2001
From: Mao Han <han_mao@c-sky.com>
Date: Fri, 11 Oct 2019 10:56:55 +0800
Subject: csky: Initial stack protector support

This is a basic -fstack-protector support without per-task canary
switching. The protector will report something like when stack
corruption is detected:

It's tested with strcpy local array overflow in sys_kill and get:
stack-protector: Kernel stack is corrupted in: sys_kill+0x23c/0x23c

TODO:
 - Support task switch for different cannary

Signed-off-by: Mao Han <han_mao@c-sky.com>
Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
---
 arch/csky/Kconfig | 1 +
 1 file changed, 1 insertion(+)

(limited to 'arch/csky/Kconfig')

diff --git a/arch/csky/Kconfig b/arch/csky/Kconfig
index da09c884cc30..ea7f3b890d03 100644
--- a/arch/csky/Kconfig
+++ b/arch/csky/Kconfig
@@ -49,6 +49,7 @@ config CSKY
 	select HAVE_PERF_USER_STACK_DUMP
 	select HAVE_DMA_API_DEBUG
 	select HAVE_DMA_CONTIGUOUS
+	select HAVE_STACKPROTECTOR
 	select HAVE_SYSCALL_TRACEPOINTS
 	select MAY_HAVE_SPARSE_IRQ
 	select MODULES_USE_ELF_RELA if MODULES
-- 
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