linux-kernel - [PATCH AUTOSEL 5.4 049/459] kernel/module: Fix memleak in module_add_modinfo

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Message-Id: <20200214160149.11681-49-sashal@kernel.org>
Date:   Fri, 14 Feb 2020 10:54:59 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     YueHaibing <yuehaibing@...wei.com>,
        Miroslav Benes <mbenes@...e.cz>, Jessica Yu <jeyu@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH AUTOSEL 5.4 049/459] kernel/module: Fix memleak in module_add_modinfo_attrs()

From: YueHaibing <yuehaibing@...wei.com>

[ Upstream commit f6d061d617124abbd55396a3bc37b9bf7d33233c ]

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")
Reviewed-by: Miroslav Benes <mbenes@...e.cz>
Signed-off-by: YueHaibing <yuehaibing@...wei.com>
Signed-off-by: Jessica Yu <jeyu@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 kernel/module.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/kernel/module.c b/kernel/module.c
index cb09a5f37a5fc..9fb8fa22e16b3 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -1781,6 +1781,8 @@ 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;
 }
 
-- 
2.20.1