linux-kernel - [PATCH 5.4 48/60] parisc: Enable ARCH_HAS_STRICT_MODULE

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Message-Id: <20220627111929.102264306@linuxfoundation.org>
Date:   Mon, 27 Jun 2022 13:21:59 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Helge Deller <deller@....de>,
        John David Anglin <dave.anglin@...l.net>
Subject: [PATCH 5.4 48/60] parisc: Enable ARCH_HAS_STRICT_MODULE_RWX

From: Helge Deller <deller@....de>

commit 0a1355db36718178becd2bfe728a023933d73123 upstream.

Fix a boot crash on a c8000 machine as reported by Dave.  Basically it changes
patch_map() to return an alias mapping to the to-be-patched code in order to
prevent writing to write-protected memory.

Signed-off-by: Helge Deller <deller@....de>
Suggested-by: John David Anglin <dave.anglin@...l.net>
Cc: stable@...r.kernel.org   # v5.2+
Link: https://lore.kernel.org/all/e8ec39e8-25f8-e6b4-b7ed-4cb23efc756e@bell.net/
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 arch/parisc/Kconfig |    1 +
 1 file changed, 1 insertion(+)

--- a/arch/parisc/Kconfig
+++ b/arch/parisc/Kconfig
@@ -11,6 +11,7 @@ config PARISC
 	select ARCH_WANT_FRAME_POINTERS
 	select ARCH_HAS_ELF_RANDOMIZE
 	select ARCH_HAS_STRICT_KERNEL_RWX
+	select ARCH_HAS_STRICT_MODULE_RWX
 	select ARCH_HAS_UBSAN_SANITIZE_ALL
 	select ARCH_NO_SG_CHAIN
 	select ARCH_SUPPORTS_MEMORY_FAILURE