linux-kernel - [PATCH] hv_netvsc: Fix a memory leak bug

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Date:   Wed, 14 Aug 2019 15:16:11 -0500
From:   Wenwen Wang <wenwen@...uga.edu>
To:     Wenwen Wang <wenwen@...uga.edu>
Cc:     "K. Y. Srinivasan" <kys@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        Sasha Levin <sashal@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        linux-hyperv@...r.kernel.org (open list:Hyper-V CORE AND DRIVERS),
        netdev@...r.kernel.org (open list:NETWORKING DRIVERS),
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH] hv_netvsc: Fix a memory leak bug

In rndis_filter_device_add(), 'rndis_device' is allocated through kzalloc()
by invoking get_rndis_device(). In the following execution, if an error
occurs, the execution will go to the 'err_dev_remv' label. However, the
allocated 'rndis_device' is not deallocated, leading to a memory leak bug.

Signed-off-by: Wenwen Wang <wenwen@...uga.edu>
---
 drivers/net/hyperv/rndis_filter.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/hyperv/rndis_filter.c b/drivers/net/hyperv/rndis_filter.c
index 317dbe9..ed35085 100644
--- a/drivers/net/hyperv/rndis_filter.c
+++ b/drivers/net/hyperv/rndis_filter.c
@@ -1420,6 +1420,7 @@ struct netvsc_device *rndis_filter_device_add(struct hv_device *dev,
 
 err_dev_remv:
 	rndis_filter_device_remove(dev, net_device);
+	kfree(rndis_device);
 	return ERR_PTR(ret);
 }
 
-- 
2.7.4