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From: Jinchao Wang <wangjinchao600@gmail.com>
To: Luis Chamberlain <mcgrof@kernel.org>,
	Petr Pavlu <petr.pavlu@suse.com>,
	Daniel Gomez <da.gomez@kernel.org>,
	Sami Tolvanen <samitolvanen@google.com>,
	linux-modules@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Jinchao Wang <wangjinchao600@gmail.com>
Subject: [PATCH v2 4/4] module: separate vermagic and livepatch checks
Date: Mon, 25 Aug 2025 17:15:35 +0800	[thread overview]
Message-ID: <20250825091545.18607-5-wangjinchao600@gmail.com> (raw)
In-Reply-To: <20250825091545.18607-1-wangjinchao600@gmail.com>

Rename check_modinfo() to check_modinfo_vermagic() to clarify it only
checks vermagic compatibility.

Move livepatch check to happen after vermagic check in early_mod_check(),
creating proper separation of concerns.

This makes the module loading sequence more logical:
- First verify module vermagic
- Then check livepatch-specific requirements

No functional changes, just clearer code organization.

Signed-off-by: Jinchao Wang <wangjinchao600@gmail.com>
---
 kernel/module/main.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/kernel/module/main.c b/kernel/module/main.c
index a426bd8a18b5..d30bffeef63e 100644
--- a/kernel/module/main.c
+++ b/kernel/module/main.c
@@ -2571,7 +2571,7 @@ static void module_augment_kernel_taints(struct module *mod, struct load_info *i
 
 }
 
-static int check_modinfo(struct module *mod, struct load_info *info, int flags)
+static int check_modinfo_vermagic(struct module *mod, struct load_info *info, int flags)
 {
 	const char *modmagic = get_modinfo(info, "vermagic");
 	int err;
@@ -2590,10 +2590,6 @@ static int check_modinfo(struct module *mod, struct load_info *info, int flags)
 		return -ENOEXEC;
 	}
 
-	err = check_modinfo_livepatch(mod, info);
-	if (err)
-		return err;
-
 	return 0;
 }
 
@@ -3334,7 +3330,11 @@ static int early_mod_check(struct load_info *info, int flags)
 	if (!check_modstruct_version(info, info->mod))
 		return -ENOEXEC;
 
-	err = check_modinfo(info->mod, info, flags);
+	err = check_modinfo_vermagic(info->mod, info, flags);
+	if (err)
+		return err;
+
+	err = check_modinfo_livepatch(info->mod, info);
 	if (err)
 		return err;
 
-- 
2.43.0


      parent reply	other threads:[~2025-08-25  9:16 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-08-25  9:15 [PATCH v2 0/4] module: logging and code improvements Jinchao Wang
2025-08-25  9:15 ` [PATCH v2 1/4] module: signing: Use pr_err for signature rejection Jinchao Wang
2025-08-25  9:15 ` [PATCH v2 2/4] module: show why force load fails Jinchao Wang
2025-08-26  9:33   ` Petr Pavlu
2025-08-26  9:51     ` Jinchao Wang
2025-08-25  9:15 ` [PATCH v2 3/4] module: centralize no-versions force load check Jinchao Wang
2025-08-26  9:40   ` Petr Pavlu
2025-08-25  9:15 ` Jinchao Wang [this message]

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