Checking for pointers to be NULL before allocating memory

openair2/NR_UE_PHY_INTERFACE/NR_IF_Module.c

@@ -318,7 +318,10 @@ static void copy_dl_tti_req_to_dl_info(nr_downlink_indication_t *dl_info, nfapi_
             uint16_t num_dcis = pdu_list->pdcch_pdu.pdcch_pdu_rel15.numDlDci;
             if (num_dcis > 0)
             {
-                dl_info->dci_ind = CALLOC(1, sizeof(fapi_nr_dci_indication_t));
+                if (!dl_info->dci_ind)
+                {
+                    dl_info->dci_ind = CALLOC(1, sizeof(fapi_nr_dci_indication_t));
+                }
                 dl_info->dci_ind->SFN = dl_tti_request->SFN;
                 dl_info->dci_ind->slot = dl_tti_request->Slot;
                 AssertFatal(num_dcis <= sizeof(dl_info->dci_ind->dci_list) / sizeof(dl_info->dci_ind->dci_list[0]),
@@ -362,7 +365,10 @@ static void copy_dl_tti_req_to_dl_info(nr_downlink_indication_t *dl_info, nfapi_
                will be freed after handling. This is why the PDU index will
                always be zero for the RX_IND becasue we should not have more than
                one MIB. */
-            dl_info->rx_ind = CALLOC(1, sizeof(*dl_info->rx_ind));
+            if (!dl_info->rx_ind)
+            {
+                dl_info->rx_ind = CALLOC(1, sizeof(*dl_info->rx_ind));
+            }
             fapi_nr_rx_indication_t *rx_ind = dl_info->rx_ind;
             rx_ind->sfn = dl_tti_request->SFN;
             rx_ind->slot = dl_tti_request->Slot;
@@ -412,7 +418,10 @@ static void copy_tx_data_req_to_dl_info(nr_downlink_indication_t *dl_info, nfapi
     int num_pdus = tx_data_request->Number_of_PDUs;
     AssertFatal(num_pdus >= 0, "Invalid tx_data_request number of PDUS\n");
 
-    dl_info->rx_ind = CALLOC(1, sizeof(fapi_nr_rx_indication_t));
+    if (!dl_info->rx_ind)
+    {
+        dl_info->rx_ind = CALLOC(1, sizeof(fapi_nr_rx_indication_t));
+    }
     AssertFatal(dl_info->rx_ind != NULL, "%s: Out of memory in calloc", __FUNCTION__);
     fapi_nr_rx_indication_t *rx_ind = dl_info->rx_ind;
     rx_ind->sfn = tx_data_request->SFN;
@@ -469,7 +478,10 @@ static void copy_ul_dci_data_req_to_dl_info(nr_downlink_indication_t *dl_info, n
         uint16_t num_dci = pdu_list->pdcch_pdu.pdcch_pdu_rel15.numDlDci;
         if (num_dci > 0)
         {
-            dl_info->dci_ind = CALLOC(1, sizeof(fapi_nr_dci_indication_t));
+            if (!dl_info->dci_ind)
+            {
+                dl_info->dci_ind = CALLOC(1, sizeof(fapi_nr_dci_indication_t));
+            }
             AssertFatal(dl_info->dci_ind != NULL, "%s: Out of memory in calloc", __FUNCTION__);
             dl_info->dci_ind->SFN = ul_dci_req->SFN;
             dl_info->dci_ind->slot = ul_dci_req->Slot;