linux-kernel - Re: [PATCH v6 06/13] module: Move strict rwx support to a separate file

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Date:   Mon, 21 Feb 2022 11:27:17 +0000
From:   Christophe Leroy <christophe.leroy@...roup.eu>
To:     Aaron Tomlin <atomlin@...hat.com>,
        "mcgrof@...nel.org" <mcgrof@...nel.org>
CC:     "cl@...ux.com" <cl@...ux.com>,
        "pmladek@...e.com" <pmladek@...e.com>,
        "mbenes@...e.cz" <mbenes@...e.cz>,
        "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
        "jeyu@...nel.org" <jeyu@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-modules@...r.kernel.org" <linux-modules@...r.kernel.org>,
        "live-patching@...r.kernel.org" <live-patching@...r.kernel.org>,
        "atomlin@...mlin.com" <atomlin@...mlin.com>,
        "ghalat@...hat.com" <ghalat@...hat.com>,
        "allen.lkml@...il.com" <allen.lkml@...il.com>,
        "joe@...ches.com" <joe@...ches.com>,
        "msuchanek@...e.de" <msuchanek@...e.de>,
        "oleksandr@...alenko.name" <oleksandr@...alenko.name>
Subject: Re: [PATCH v6 06/13] module: Move strict rwx support to a separate
 file



Le 18/02/2022 à 22:25, Aaron Tomlin a écrit :
> No functional change.
> 
> This patch migrates code that makes module text
> and rodata memory read-only and non-text memory
> non-executable from core module code into
> kernel/module/strict_rwx.c.
> 
> Signed-off-by: Aaron Tomlin <atomlin@...hat.com>
> ---
>   kernel/module/Makefile     |  1 +
>   kernel/module/internal.h   | 38 +++++++++++++++
>   kernel/module/main.c       | 99 +-------------------------------------
>   kernel/module/strict_rwx.c | 84 ++++++++++++++++++++++++++++++++
>   4 files changed, 125 insertions(+), 97 deletions(-)
>   create mode 100644 kernel/module/strict_rwx.c


kernel/module/internal.h:182:12: error: 'module_enforce_rwx_sections' 
defined but not used [-Werror=unused-function]
kernel/module/internal.h:181:13: error: 'module_enable_ro' defined but 
not used [-Werror=unused-function]
kernel/module/internal.h:180:13: error: 'module_enable_nx' defined but 
not used [-Werror=unused-function]
cc1: all warnings being treated as errors
make[3]: *** [scripts/Makefile.build:288: kernel/module/signing.o] Error 1