[SCSI] bfa: Fix possible NULL pointer dereference in lunmask add/delete.

Patch fixes the possible NULL pointer dereference when we try to add or delete
a rpwwn to the lunmask config which is not zoned to this port.  Check if the
FCS rport is not NULL before de-referencing it.

Signed-off-by: Krishna Gudipati <kgudipat@brocade.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/scsi/bfa/bfa_fcpim.c b/drivers/scsi/bfa/bfa_fcpim.c
index e07bd4745d8b..846f15b6e1d8 100644
--- a/drivers/scsi/bfa/bfa_fcpim.c
+++ b/drivers/scsi/bfa/bfa_fcpim.c
@@ -2647,7 +2647,8 @@ bfa_fcpim_lunmask_add(struct bfa_s *bfa, u16 vf_id, wwn_t *pwwn,
         if (port) {
                 *pwwn = port->port_cfg.pwwn;
                 rp_fcs = bfa_fcs_lport_get_rport_by_pwwn(port, rpwwn);
-                rp = rp_fcs->bfa_rport;
+                if (rp_fcs)
+                        rp = rp_fcs->bfa_rport;
         }
 
         lunm_list = bfa_get_lun_mask_list(bfa);
@@ -2715,7 +2716,8 @@ bfa_fcpim_lunmask_delete(struct bfa_s *bfa, u16 vf_id, wwn_t *pwwn,
                 if (port) {
                         *pwwn = port->port_cfg.pwwn;
                         rp_fcs = bfa_fcs_lport_get_rport_by_pwwn(port, rpwwn);
-                        rp = rp_fcs->bfa_rport;
+                        if (rp_fcs)
+                                rp = rp_fcs->bfa_rport;
                 }
         }