linux-kernel - [PATCH 3/3] net-sysfs: Fix error path for kobject_init_and

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Message-Id: <20190430002817.10785-4-tobin@kernel.org>
Date:   Tue, 30 Apr 2019 10:28:17 +1000
From:   "Tobin C. Harding" <tobin@...nel.org>
To:     "David S. Miller" <davem@...emloft.net>
Cc:     "Tobin C. Harding" <tobin@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Tyler Hicks <tyhicks@...onical.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Ido Schimmel <idosch@...lanox.com>,
        Alexander Duyck <alexander.h.duyck@...el.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Wang Hai <wanghai26@...wei.com>,
        YueHaibing <yuehaibing@...wei.com>,
        Amritha Nambiar <amritha.nambiar@...el.com>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 3/3] net-sysfs: Fix error path for kobject_init_and_add()

Currently error return from kobject_init_and_add() is not followed by a
call to kobject_put().  This means there is a memory leak.

Add call to kobject_put() in error path of kobject_init_and_add().

Signed-off-by: Tobin C. Harding <tobin@...nel.org>
---
 net/core/net-sysfs.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
index 8f8b7b6c2945..9d4e3f47b789 100644
--- a/net/core/net-sysfs.c
+++ b/net/core/net-sysfs.c
@@ -925,8 +925,10 @@ static int rx_queue_add_kobject(struct net_device *dev, int index)
 	kobj->kset = dev->queues_kset;
 	error = kobject_init_and_add(kobj, &rx_queue_ktype, NULL,
 				     "rx-%u", index);
-	if (error)
+	if (error) {
+		kobject_put(kobj);
 		return error;
+	}
 
 	dev_hold(queue->dev);
 
@@ -1462,8 +1464,10 @@ static int netdev_queue_add_kobject(struct net_device *dev, int index)
 	kobj->kset = dev->queues_kset;
 	error = kobject_init_and_add(kobj, &netdev_queue_ktype, NULL,
 				     "tx-%u", index);
-	if (error)
+	if (error) {
+		kobject_put(kobj);
 		return error;
+	}
 
 	dev_hold(queue->dev);
 
-- 
2.21.0