linux-kernel - [PATCH] kernel/module: Fix memleak in module_add_modinfo

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Date:   Sat, 28 Dec 2019 19:54:55 +0800
From:   YueHaibing <yuehaibing@...wei.com>
To:     <jeyu@...nel.org>, <mbenes@...e.cz>, <yuehaibing@...wei.com>
CC:     <linux-kernel@...r.kernel.org>
Subject: [PATCH] kernel/module: Fix memleak in module_add_modinfo_attrs()

In module_add_modinfo_attrs() if sysfs_create_file() fails
on the first iteration of the loop (so i = 0), we forget to
free the modinfo_attrs.

Fixes: bc6f2a757d52 ("kernel/module: Fix mem leak in module_add_modinfo_attrs")
Signed-off-by: YueHaibing <yuehaibing@...wei.com>
---
 kernel/module.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/kernel/module.c b/kernel/module.c
index c3770b2..8ec670e 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -1784,6 +1784,8 @@ static int module_add_modinfo_attrs(struct module *mod)
 error_out:
 	if (i > 0)
 		module_remove_modinfo_attrs(mod, --i);
+	else
+		kfree(mod->modinfo_attrs);
 	return error;
 }
 
-- 
2.7.4