[PATCH 1/7] modpost: fix section mismatch check for exported init/exit sections

From: Masahiro Yamada <masahiroy@kernel.org>
To: linux-kbuild@vger.kernel.org
Cc: Al Viro <viro@zeniv.linux.org.uk>,
	Nicolas Pitre <npitre@baylibre.com>,
	Luis Chamberlain <mcgrof@kernel.org>,
	linux-modules@vger.kernel.org, Ard Biesheuvel <ardb@kernel.org>,
	Masahiro Yamada <masahiroy@kernel.org>,
	Nick Desaulniers <ndesaulniers@google.com>,
	Alessio Igor Bogani <abogani@kernel.org>,
	Michal Marek <michal.lkml@markovi.net>,
	Rusty Russell <rusty@rustcorp.com.au>,
	linux-kernel@vger.kernel.org
Subject: [PATCH 1/7] modpost: fix section mismatch check for exported init/exit sections
Date: Sat, 11 Jun 2022 03:32:30 +0900	[thread overview]
Message-ID: <20220610183236.1272216-2-masahiroy@kernel.org> (raw)
In-Reply-To: <20220610183236.1272216-1-masahiroy@kernel.org>

Since commit f02e8a6596b7 ("module: Sort exported symbols"),
EXPORT_SYMBOL* is placed in the individual section ___ksymtab(_gpl)+<sym>
(3 leading underscores instead of 2).

Since then, modpost cannot detect the bad combination of EXPORT_SYMBOL
and __init/__exit.

Fix the .fromsec field.

Fixes: f02e8a6596b7 ("module: Sort exported symbols")
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
---

 scripts/mod/modpost.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 29d5a841e215..620dc8c4c814 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -980,7 +980,7 @@ static const struct sectioncheck sectioncheck[] = {
 },
 /* Do not export init/exit functions or data */
 {
-	.fromsec = { "__ksymtab*", NULL },
+	.fromsec = { "___ksymtab*", NULL },
 	.bad_tosec = { INIT_SECTIONS, EXIT_SECTIONS, NULL },
 	.mismatch = EXPORT_TO_INIT_EXIT,
 	.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
-- 
2.32.0

