linux-kernel - [PATCH] firmware: dmi-sysfs: Fix memory leak in dmi_sysfs_register

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Message-Id: <20220511071421.9769-1-linmq006@gmail.com>
Date:   Wed, 11 May 2022 11:14:19 +0400
From:   Miaoqian Lin <linmq006@...il.com>
To:     Miaoqian Lin <linmq006@...il.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Mike Waychison <mikew@...gle.com>, linux-kernel@...r.kernel.org
Subject: [PATCH] firmware: dmi-sysfs: Fix memory leak in dmi_sysfs_register_handle

kobject_init_and_add() takes reference even when it fails.
According to the doc of kobject_init_and_add()

   If this function returns an error, kobject_put() must be called to
   properly clean up the memory associated with the object.

Fix this issue by calling kobject_put().

Fixes: 948af1f0bbc8 ("firmware: Basic dmi-sysfs support")
Signed-off-by: Miaoqian Lin <linmq006@...il.com>
---
 drivers/firmware/dmi-sysfs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/firmware/dmi-sysfs.c b/drivers/firmware/dmi-sysfs.c
index 3a353776bd34..66727ad3361b 100644
--- a/drivers/firmware/dmi-sysfs.c
+++ b/drivers/firmware/dmi-sysfs.c
@@ -604,7 +604,7 @@ static void __init dmi_sysfs_register_handle(const struct dmi_header *dh,
 				    "%d-%d", dh->type, entry->instance);
 
 	if (*ret) {
-		kfree(entry);
+		kobject_put(&entry->kobj);
 		return;
 	}
 
-- 
2.25.1