[PATCH 4.19 15/79] scsi: qla2xxx: fix a potential NULL pointer dereference

[Greg Kroah-Hartman]

From: Allen Pais <allen.pais@xxxxxxxxxx>

[ Upstream commit 35a79a63517981a8aea395497c548776347deda8 ]

alloc_workqueue is not checked for errors and as a result a potential
NULL dereference could occur.

Link: https://lore.kernel.org/r/1568824618-4366-1-git-send-email-allen.pais@xxxxxxxxxx
Signed-off-by: Allen Pais <allen.pais@xxxxxxxxxx>
Reviewed-by: Martin Wilck <mwilck@xxxxxxxx>
Acked-by: Himanshu Madhani <hmadhani@xxxxxxxxxxx>
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/scsi/qla2xxx/qla_os.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index 60b6019a2fcae..856a7ceb9a041 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -3186,6 +3186,10 @@ qla2x00_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
 	    req->req_q_in, req->req_q_out, rsp->rsp_q_in, rsp->rsp_q_out);
 
 	ha->wq = alloc_workqueue("qla2xxx_wq", 0, 0);
+	if (unlikely(!ha->wq)) {
+		ret = -ENOMEM;
+		goto probe_failed;
+	}
 
 	if (ha->isp_ops->initialize_adapter(base_vha)) {
 		ql_log(ql_log_fatal, base_vha, 0x00d6,
-- 
2.20.1