linux-kernel - [PATCH v2] drivers: net: ionic: fix a memory leak bug

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Message-ID: <20241106085307.1783-1-liangwentao@iscas.ac.cn>
Date: Wed,  6 Nov 2024 16:53:07 +0800
From: Wentao Liang <liangwentao@...as.ac.cn>
To: shannon.nelson@....com,
	brett.creeley@....com,
	davem@...emloft.net,
	kuba@...nel.org
Cc: linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org,
	Wentao Liang <Wentao_liang_g@....com>,
	Wentao Liang <liangwentao@...as.ac.cn>
Subject: [PATCH v2] drivers: net: ionic: fix a memory leak bug

From: Wentao Liang <Wentao_liang_g@....com>

In line 334, the ionic_setup_one() creates a debugfs entry for
ionic upon successful execution. However, the ionic_probe() does
not release the dentry before returning, resulting in a memory
leak. To fix this bug, we add the ionic_debugfs_del_dev() before
line 397 to release the resources before the function returns.

Fixes: 0de38d9f1dba ("ionic: extract common bits from ionic_probe")
Signed-off-by: Wentao Liang <liangwentao@...as.ac.cn>
---
 drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c b/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c
index b93791d6b593..f5dc876eb500 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c
@@ -394,6 +394,7 @@ static int ionic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 err_out_pci:
 	ionic_dev_teardown(ionic);
 	ionic_clear_pci(ionic);
+	ionic_debugfs_del_dev(ionic);
 err_out:
 	mutex_destroy(&ionic->dev_cmd_lock);
 	ionic_devlink_free(ionic);
-- 
2.42.0.windows.2