linux-kernel - [PATCH] modpost: fix section mismatch check for exported init/exit sections

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Message-Id: <20220530125258.3149370-1-masahiroy@kernel.org>
Date:   Mon, 30 May 2022 21:52:58 +0900
From:   Masahiro Yamada <masahiroy@...nel.org>
To:     linux-kbuild@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org,
        Masahiro Yamada <masahiroy@...nel.org>,
        Alessio Igor Bogani <abogani@...nel.org>,
        Michal Marek <michal.lkml@...kovi.net>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Rusty Russell <rusty@...tcorp.com.au>
Subject: [PATCH] modpost: fix section mismatch check for exported init/exit sections

Since commit f02e8a6596b7 ("module: Sort exported symbols"),
EXPORT_SYMBOL is placed in the individual section ___ksymtab(_gpl)+<sym>
(3 leading underscores, not 2).

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

Fix the .fromsec to ___ksymtab*.

Fixes: f02e8a6596b7 ("module: Sort exported symbols")
Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>
---

 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