linux-kernel - [PATCH] [v2] ethernet: atheros: fix a memleak in atl1e_setup_ring

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Message-Id: <20231208082316.3384650-1-alexious@zju.edu.cn>
Date:   Fri,  8 Dec 2023 16:23:14 +0800
From:   Zhipeng Lu <alexious@....edu.cn>
To:     alexious@....edu.cn
Cc:     Chris Snook <chris.snook@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Simon Horman <horms@...nel.org>,
        Yuanjun Gong <ruc_gongyuanjun@....com>,
        Jie Yang <jie.yang@...eros.com>,
        Jeff Garzik <jgarzik@...hat.com>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] [v2] ethernet: atheros: fix a memleak in atl1e_setup_ring_resources

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@....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