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From:   Zhipeng Lu <alexious@zju.edu.cn>
To:     alexious@zju.edu.cn
Cc:     Chris Snook <chris.snook@gmail.com>,
        "David S. Miller" <davem@davemloft.net>,
        Eric Dumazet <edumazet@google.com>,
        Jakub Kicinski <kuba@kernel.org>,
        Paolo Abeni <pabeni@redhat.com>,
        Simon Horman <horms@kernel.org>,
        Yuanjun Gong <ruc_gongyuanjun@163.com>,
        Jie Yang <jie.yang@atheros.com>,
        Jeff Garzik <jgarzik@redhat.com>, netdev@vger.kernel.org,
        linux-kernel@vger.kernel.org
Subject: [PATCH] [v2] ethernet: atheros: fix a memleak in atl1e_setup_ring_resources
Date:   Fri,  8 Dec 2023 16:23:14 +0800
Message-Id: <20231208082316.3384650-1-alexious@zju.edu.cn>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

In the error handling of 'offset > adapter->ring_size', the
tx_ring->tx_buffer allocated by kzalloc should be freed,
instead of 'goto failed' instantly.

Fixes: a6a5325239c2 ("atl1e: Atheros L1E Gigabit Ethernet driver")
Signed-off-by: Zhipeng Lu <alexious@zju.edu.cn>
---

Changelog:

v2: Setting tx_ring->tx_buffer to NULL after free.
---
 drivers/net/ethernet/atheros/atl1e/atl1e_main.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/atheros/atl1e/atl1e_main.c b/drivers/net/ethernet/atheros/atl1e/atl1e_main.c
index 5935be190b9e..1bffe77439ac 100644
--- a/drivers/net/ethernet/atheros/atl1e/atl1e_main.c
+++ b/drivers/net/ethernet/atheros/atl1e/atl1e_main.c
@@ -866,6 +866,8 @@ static int atl1e_setup_ring_resources(struct atl1e_adapter *adapter)
 		netdev_err(adapter->netdev, "offset(%d) > ring size(%d) !!\n",
 			   offset, adapter->ring_size);
 		err = -1;
+		kfree(tx_ring->tx_buffer);
+		tx_ring->tx_buffer = NULL;
 		goto failed;
 	}
 
-- 
2.34.1