linux-kernel - [PATCH] arm64: Make TSK_STACK

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Message-Id: <1594613013-13059-1-git-send-email-guoren@kernel.org>
Date:   Mon, 13 Jul 2020 04:03:33 +0000
From:   guoren@...nel.org
To:     catalin.marinas@....com, will@...nel.org
Cc:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-csky@...r.kernel.org, Guo Ren <guoren@...ux.alibaba.com>
Subject: [PATCH] arm64: Make TSK_STACK_CANARY more accurate defined

From: Guo Ren <guoren@...ux.alibaba.com>

TSK_STACK_CANARY only used in arm64/Makefile with
CONFIG_STACKPROTECTOR_PER_TASK wrap. So use the same policy in
asm-offset.c.

Signed-off-by: Guo Ren <guoren@...ux.alibaba.com>
Co-developed-by: Kees Cook <keescook@...omium.org>
Cc: Catalin Marinas <catalin.marinas@....com>
Cc: Will Deacon <will@...nel.org>
---
 arch/arm64/kernel/asm-offsets.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/kernel/asm-offsets.c b/arch/arm64/kernel/asm-offsets.c
index 0577e21..37d5d3d 100644
--- a/arch/arm64/kernel/asm-offsets.c
+++ b/arch/arm64/kernel/asm-offsets.c
@@ -39,7 +39,7 @@ int main(void)
   DEFINE(TSK_TI_SCS_SP,		offsetof(struct task_struct, thread_info.scs_sp));
 #endif
   DEFINE(TSK_STACK,		offsetof(struct task_struct, stack));
-#ifdef CONFIG_STACKPROTECTOR
+#ifdef CONFIG_STACKPROTECTOR_PER_TASK
   DEFINE(TSK_STACK_CANARY,	offsetof(struct task_struct, stack_canary));
 #endif
   BLANK();
-- 
2.7.4