lpfc: Fix possible NULL pointer dereference

Check for the existence of piocb->vport before accessing it.

Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Acked-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Tyrel Datwyler <tyreld@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c
index 351d08a..7080ce2 100644 (file)
--- a/drivers/scsi/lpfc/lpfc_sli.c
+++ b/drivers/scsi/lpfc/lpfc_sli.c
@@ -1323,21 +1323,18 @@ lpfc_sli_ringtxcmpl_put(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
 {
        lockdep_assert_held(&phba->hbalock);
 
+       BUG_ON(!piocb || !piocb->vport);
+
        list_add_tail(&piocb->list, &pring->txcmplq);
        piocb->iocb_flag |= LPFC_IO_ON_TXCMPLQ;
 
        if ((unlikely(pring->ringno == LPFC_ELS_RING)) &&
           (piocb->iocb.ulpCommand != CMD_ABORT_XRI_CN) &&
           (piocb->iocb.ulpCommand != CMD_CLOSE_XRI_CN) &&
-        (!(piocb->vport->load_flag & FC_UNLOADING))) {
-               if (!piocb->vport)
-                       BUG();
-               else
-                       mod_timer(&piocb->vport->els_tmofunc,
-                               jiffies +
-                               msecs_to_jiffies(1000 * (phba->fc_ratov << 1)));
-       }
-
+           (!(piocb->vport->load_flag & FC_UNLOADING)))
+               mod_timer(&piocb->vport->els_tmofunc,
+                         jiffies +
+                         msecs_to_jiffies(1000 * (phba->fc_ratov << 1)));
 
        return 0;
 }