[PATCH -next] scsi: libfc: Fix potential NULL pointer dereference

[YueHaibing]

There is a potential NULL pointer dereference in case
fc_rport_create() fails and returns NULL.

Fixes: 2580064b5ec6 ("scsi: libfc: Replace ->rport_create callback with 
function call")
Signed-off-by: YueHaibing <yuehaib...@huawei.com>
---
 drivers/scsi/libfc/fc_lport.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/scsi/libfc/fc_lport.c b/drivers/scsi/libfc/fc_lport.c
index ff943f4..e2a3551 100644
--- a/drivers/scsi/libfc/fc_lport.c
+++ b/drivers/scsi/libfc/fc_lport.c
@@ -250,6 +250,10 @@ static void fc_lport_ptp_setup(struct fc_lport *lport,
        }
        mutex_lock(&lport->disc.disc_mutex);
        lport->ptp_rdata = fc_rport_create(lport, remote_fid);
+       if (!lport->ptp_rdata) {
+               mutex_unlock(&lport->disc.disc_mutex);
+               return;
+       }
        kref_get(&lport->ptp_rdata->kref);
        lport->ptp_rdata->ids.port_name = remote_wwpn;
        lport->ptp_rdata->ids.node_name = remote_wwnn;
-- 
2.7.0