[PATCH] next: qlogic: fix a potential NULL pointer dereference

From: Kangjie Lu
Date: Mon Mar 11 2019 - 02:51:12 EST


In case create_singlethread_workqueue fails, the fix returns
-ENOMEM to avoid NULL pointer dereference.

Signed-off-by: Kangjie Lu <kjlu@xxxxxxx>
---
drivers/net/ethernet/qlogic/qla3xxx.c | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/drivers/net/ethernet/qlogic/qla3xxx.c b/drivers/net/ethernet/qlogic/qla3xxx.c
index 10b075bc5959..b61b88cbc0c7 100644
--- a/drivers/net/ethernet/qlogic/qla3xxx.c
+++ b/drivers/net/ethernet/qlogic/qla3xxx.c
@@ -3886,6 +3886,12 @@ static int ql3xxx_probe(struct pci_dev *pdev,
netif_stop_queue(ndev);

qdev->workqueue = create_singlethread_workqueue(ndev->name);
+ if (!qdev->workqueue) {
+ unregister_netdev(ndev);
+ err = -ENOMEM;
+ goto err_out_iounmap;
+ }
+
INIT_DELAYED_WORK(&qdev->reset_work, ql_reset_work);
INIT_DELAYED_WORK(&qdev->tx_timeout_work, ql_tx_timeout_work);
INIT_DELAYED_WORK(&qdev->link_state_work, ql_link_state_machine_work);
--
2.17.1