scsi: qla4xxx: fix a potential NULL pointer dereference

[ Upstream commit fba1bdd2a9a93f3e2181ec1936a3c2f6b37e7ed6 ]

In case iscsi_lookup_endpoint fails, the fix returns -EINVAL to avoid NULL
pointer dereference.

Signed-off-by: Kangjie Lu <kjlu@umn.edu>
Acked-by: Manish Rangankar <mrangankar@marvell.com>
Reviewed-by: Mukesh Ojha <mojha@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin (Microsoft) <sashal@kernel.org>

diff --git a/drivers/scsi/qla4xxx/ql4_os.c b/drivers/scsi/qla4xxx/ql4_os.c
index 575445c..5dd3e4e 100644 (file)
--- a/drivers/scsi/qla4xxx/ql4_os.c
+++ b/drivers/scsi/qla4xxx/ql4_os.c
@@ -3204,6 +3204,8 @@ 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;