linux-kernel - [PATCH 5.7 086/120] net: nixge: fix potential memory leak in nixge

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Date:   Mon,  3 Aug 2020 14:19:04 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Hulk Robot <hulkci@...wei.com>,
        Lu Wei <luwei32@...wei.com>,
        "David S. Miller" <davem@...emloft.net>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.7 086/120] net: nixge: fix potential memory leak in nixge_probe()

From: Lu Wei <luwei32@...wei.com>

[ Upstream commit 366228ed01f6882cc203e3d5b40010dfae0be1c3 ]

If some processes in nixge_probe() fail, free_netdev(dev)
needs to be called to aviod a memory leak.

Fixes: 87ab207981ec ("net: nixge: Separate ctrl and dma resources")
Fixes: abcd3d6fc640 ("net: nixge: Fix error path for obtaining mac address")
Reported-by: Hulk Robot <hulkci@...wei.com>
Signed-off-by: Lu Wei <luwei32@...wei.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/ethernet/ni/nixge.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/ni/nixge.c b/drivers/net/ethernet/ni/nixge.c
index 2fdd0753b3afd..0e776131a3ef3 100644
--- a/drivers/net/ethernet/ni/nixge.c
+++ b/drivers/net/ethernet/ni/nixge.c
@@ -1298,19 +1298,21 @@ static int nixge_probe(struct platform_device *pdev)
 	netif_napi_add(ndev, &priv->napi, nixge_poll, NAPI_POLL_WEIGHT);
 	err = nixge_of_get_resources(pdev);
 	if (err)
-		return err;
+		goto free_netdev;
 	__nixge_hw_set_mac_address(ndev);
 
 	priv->tx_irq = platform_get_irq_byname(pdev, "tx");
 	if (priv->tx_irq < 0) {
 		netdev_err(ndev, "could not find 'tx' irq");
-		return priv->tx_irq;
+		err = priv->tx_irq;
+		goto free_netdev;
 	}
 
 	priv->rx_irq = platform_get_irq_byname(pdev, "rx");
 	if (priv->rx_irq < 0) {
 		netdev_err(ndev, "could not find 'rx' irq");
-		return priv->rx_irq;
+		err = priv->rx_irq;
+		goto free_netdev;
 	}
 
 	priv->coalesce_count_rx = XAXIDMA_DFT_RX_THRESHOLD;
-- 
2.25.1