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Message-ID: <602dcac64428b91b1b11e0bb730e2455ff1fb688.1692375190.git.christophe.leroy@csgroup.eu>
Date: Fri, 18 Aug 2023 18:13:27 +0200
From: Christophe Leroy <christophe.leroy@...roup.eu>
To: Michael Ellerman <mpe@...erman.id.au>,
Nicholas Piggin <npiggin@...il.com>
Cc: Christophe Leroy <christophe.leroy@...roup.eu>,
linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
Russell Currey <ruscur@...sell.cc>,
Kees Cook <keescook@...omium.org>
Subject: [PATCH 2/2] powerpc/8xx: Honor execonly protection
On powerpc 8xx, exec does not imply read so
redefine PAGE_NONE_X as PAGE_NONE + X
Signed-off-by: Christophe Leroy <christophe.leroy@...roup.eu>
Cc: Russell Currey <ruscur@...sell.cc>
Cc: Kees Cook <keescook@...omium.org>
---
arch/powerpc/include/asm/nohash/32/pte-8xx.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/powerpc/include/asm/nohash/32/pte-8xx.h b/arch/powerpc/include/asm/nohash/32/pte-8xx.h
index b234a93b05f1..f47d36d40a26 100644
--- a/arch/powerpc/include/asm/nohash/32/pte-8xx.h
+++ b/arch/powerpc/include/asm/nohash/32/pte-8xx.h
@@ -79,7 +79,7 @@
/* Permission masks used to generate the __P and __S table */
#define PAGE_NONE __pgprot(_PAGE_BASE | _PAGE_NA)
-#define PAGE_NONE_X __pgprot(_PAGE_BASE | _PAGE_RO | _PAGE_EXEC)
+#define PAGE_NONE_X __pgprot(_PAGE_BASE | _PAGE_NA | _PAGE_EXEC)
#define PAGE_SHARED __pgprot(_PAGE_BASE)
#define PAGE_SHARED_X __pgprot(_PAGE_BASE | _PAGE_EXEC)
#define PAGE_COPY __pgprot(_PAGE_BASE | _PAGE_RO)
--
2.41.0
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