linux-kernel - Re: [PATCH] module: fix clang CFI with MODULE

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Message-ID: <YVL2EXeCKA3Leng+@p200300cbcf144d003adeadfffec0265a.dip0.t-ipconnect.de>
Date:   Tue, 28 Sep 2021 13:01:37 +0200
From:   Jessica Yu <jeyu@...nel.org>
To:     Arnd Bergmann <arnd@...nel.org>
Cc:     Luis Chamberlain <mcgrof@...nel.org>,
        Arnd Bergmann <arnd@...db.de>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Miroslav Benes <mbenes@...e.cz>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Kees Cook <keescook@...omium.org>,
        Sergey Shtylyov <s.shtylyov@...russia.ru>,
        Sami Tolvanen <samitolvanen@...gle.com>,
        Stephen Boyd <swboyd@...omium.org>,
        linux-kernel@...r.kernel.org, llvm@...ts.linux.dev
Subject: Re: [PATCH] module: fix clang CFI with MODULE_UNLOAD=n

+++ Arnd Bergmann [27/09/21 14:15 +0200]:
>From: Arnd Bergmann <arnd@...db.de>
>
>When CONFIG_MODULE_UNLOAD is disabled, the module->exit member
>is not defined, causing a build failure:
>
>kernel/module.c:4493:8: error: no member named 'exit' in 'struct module'
>                mod->exit = *exit;
>
>add an #ifdef block around this.
>
>Fixes: cf68fffb66d6 ("add support for Clang CFI")
>Signed-off-by: Arnd Bergmann <arnd@...db.de>

Applied, thanks everyone!

Jessica