be2iscsi: Fix memory corruption in MBX path

 From: Dan Carpenter [mailto:dan.carpenter@oracle.com]
 Sent: Friday, March 28, 2014 1:42 AM
 Subject: re: [SCSI] be2iscsi: Fix handling timed out MBX completion from FW

 Hello Jayamohan Kallickal,

 The patch 1957aa7f: "[SCSI] be2iscsi: Fix handling timed out MBX completion from FW" from Jan 29, 2014, leads to the following static checker warning:

 drivers/scsi/be2iscsi/be_main.c:5581 beiscsi_dev_probe()
 error: memset() '&phba->ctrl.ptag_state[i]->tag_mem_state' too small (24 vs 32)

 drivers/scsi/be2iscsi/be_main.c
 5576          for (i = 0; i < MAX_MCC_CMD; i++) {
 5577                  init_waitqueue_head(&phba->ctrl.mcc_wait[i + 1]);
 5578                  phba->ctrl.mcc_tag[i] = i + 1;
 5579                  phba->ctrl.mcc_numtag[i + 1] = 0;
 5580                  phba->ctrl.mcc_tag_available++;
 5581                  memset(&phba->ctrl.ptag_state[i].tag_mem_state, 0,
 5582                         sizeof(struct beiscsi_mcc_tag_state));
                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 Probably this this be change to sizeof(struct be_dma_mem struct)?  It looks like we are corrupting memory a bit here.

 5583          }

 regards,
 dan carpenter
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: John Soni Jose <sony.john-n@emulex.com>
Signed-off-by: Jayamohan Kallickal <jayamohan.kallickal@emulex.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

drivers/scsi/be2iscsi/be_main.c

@@ -5625,7 +5625,7 @@ static int beiscsi_dev_probe(struct pci_dev *pcidev,
 		phba->ctrl.mcc_numtag[i + 1] = 0;
 		phba->ctrl.mcc_tag_available++;
 		memset(&phba->ctrl.ptag_state[i].tag_mem_state, 0,
-		       sizeof(struct beiscsi_mcc_tag_state));
+		       sizeof(struct be_dma_mem));
 	}
 
 	phba->ctrl.mcc_alloc_index = phba->ctrl.mcc_free_index = 0;