[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>

diff --git a/drivers/scsi/bfa/bfa_fcpim.c b/drivers/scsi/bfa/bfa_fcpim.c
index e07bd47..846f15b 100644 (file)
--- 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;
                }
        }