be2iscsi: Fix MCC WRB leak in open_connection

In open with IP of unknown address family, only tag is freed and error
returned. MCC WRB allocated for the operation is not freed.

Added check for supported family of IP in the beginning before
allocating the tag and WRB.
Signed-off-by: Jitendra Bhivare <jitendra.bhivare@broadcom.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/be2iscsi/be_mgmt.c

@@ -829,6 +829,13 @@ int mgmt_open_connection(struct beiscsi_hba *phba,
 	unsigned short cid = beiscsi_ep->ep_cid;
 	struct be_sge *sge;
 
+	if (dst_addr->sa_family != PF_INET && dst_addr->sa_family != PF_INET6) {
+		beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
+			    "BG_%d : unknown addr family %d\n",
+			    dst_addr->sa_family);
+		return -EINVAL;
+	}
+
 	phwi_ctrlr = phba->phwi_ctrlr;
 	phwi_context = phwi_ctrlr->phwi_ctxt;
 
@@ -868,7 +875,8 @@ int mgmt_open_connection(struct beiscsi_hba *phba,
 		beiscsi_ep->dst_addr = daddr_in->sin_addr.s_addr;
 		beiscsi_ep->dst_tcpport = ntohs(daddr_in->sin_port);
 		beiscsi_ep->ip_type = BE2_IPV4;
-	} else if (dst_addr->sa_family == PF_INET6) {
+	} else {
+		/* else its PF_INET6 family */
 		req->ip_address.ip_type = BE2_IPV6;
 		memcpy(&req->ip_address.addr,
 		       &daddr_in6->sin6_addr.in6_u.u6_addr8, 16);
@@ -877,14 +885,6 @@ int mgmt_open_connection(struct beiscsi_hba *phba,
 		memcpy(&beiscsi_ep->dst6_addr,
 		       &daddr_in6->sin6_addr.in6_u.u6_addr8, 16);
 		beiscsi_ep->ip_type = BE2_IPV6;
-	} else{
-		beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
-			    "BG_%d : unknown addr family %d\n",
-			    dst_addr->sa_family);
-		mutex_unlock(&ctrl->mbox_lock);
-		free_mcc_tag(&phba->ctrl, tag);
-		return -EINVAL;
-
 	}
 	req->cid = cid;
 	i = phba->nxt_cqid++;