linux-kernel - [PATCH] powerpc/kasan: Fix shadow start address with modules

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Message-Id: <c68163065163f303f5af1e4bbdd9f1ce69f0543e.1619260465.git.christophe.leroy@csgroup.eu>
Date:   Sat, 24 Apr 2021 10:34:43 +0000 (UTC)
From:   Christophe Leroy <christophe.leroy@...roup.eu>
To:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>
Cc:     linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH] powerpc/kasan: Fix shadow start address with modules

Modules are now located before kernel, KASAN area has to
be extended accordingly.

Fixes: 80edc68e0479 ("powerpc/32s: Define a MODULE area below kernel text all the time")
Fixes: 9132a2e82adc ("powerpc/8xx: Define a MODULE area below kernel text")
Signed-off-by: Christophe Leroy <christophe.leroy@...roup.eu>
---
 arch/powerpc/include/asm/kasan.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/include/asm/kasan.h b/arch/powerpc/include/asm/kasan.h
index 7355ed05e65e..3c478e5ef24c 100644
--- a/arch/powerpc/include/asm/kasan.h
+++ b/arch/powerpc/include/asm/kasan.h
@@ -19,7 +19,7 @@
 
 #define KASAN_SHADOW_SCALE_SHIFT	3
 
-#if defined(CONFIG_PPC_BOOK3S_32) && defined(CONFIG_MODULES) && defined(CONFIG_STRICT_KERNEL_RWX)
+#ifdef CONFIG_MODULES
 #define KASAN_KERN_START	ALIGN_DOWN(PAGE_OFFSET - SZ_256M, SZ_256M)
 #else
 #define KASAN_KERN_START	PAGE_OFFSET
-- 
2.25.0