[PATCH] scsi: qla4xxx: check for null return from iscsi_lookup_endpoint

From: Colin King
Date: Sun May 07 2017 - 20:09:52 EST

From: Colin Ian King <colin.king@xxxxxxxxxxxxx>

iscsi_lookup_endpoint can potentially return null and in 9 out of
the 10 calls to this function a null return is checked, so I think
it is pertinent to perform a null check here too and return -EINVAL
as in the other null cases.

Detected by CoverityScan, CID#147282 ("Dereference null return value")

Signed-off-by: Colin Ian King <colin.king@xxxxxxxxxxxxx>
drivers/scsi/qla4xxx/ql4_os.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/scsi/qla4xxx/ql4_os.c b/drivers/scsi/qla4xxx/ql4_os.c
index 64c6fa563fdb..803e342e1093 100644
--- a/drivers/scsi/qla4xxx/ql4_os.c
+++ b/drivers/scsi/qla4xxx/ql4_os.c
@@ -3189,6 +3189,8 @@ static int qla4xxx_conn_bind(struct iscsi_cls_session *cls_session,
if (iscsi_conn_bind(cls_session, cls_conn, is_leading))
return -EINVAL;
ep = iscsi_lookup_endpoint(transport_fd);
+ if (!ep)
+ return -EINVAL;
conn = cls_conn->dd_data;
qla_conn = conn->dd_data;
qla_conn->qla_ep = ep->dd_data;