From: Allen Pais <allen.pais@oracle.com>
Date: Wed, 18 Sep 2019 22:06:58 +0530
Subject: scsi: qla2xxx: fix a potential NULL pointer dereference
Patch-mainline: v5.4-rc5
Git-commit: 35a79a63517981a8aea395497c548776347deda8
References: bsc#1150457 CVE-2019-16233

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@oracle.com
Signed-off-by: Allen Pais <allen.pais@oracle.com>
Reviewed-by: Martin Wilck <mwilck@suse.com>
Acked-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: Daniel Wagner <dwagner@suse.de>
---
 drivers/scsi/qla2xxx/qla_os.c |    4 ++++
 1 file changed, 4 insertions(+)

--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -3223,6 +3223,10 @@ qla2x00_probe_one(struct pci_dev *pdev,
 	    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,