Do not extract CSI report if PUCCH format 2 CRC check fails in polar decoder

This fix prevents the scheduler to process a wrong CSI feedback message, for example, it avoids the scheduler to compute a wrong MCS from CQI or a wrong RI from CQI

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_uci.c

@@ -1116,10 +1116,12 @@ void handle_nr_uci_pucch_2_3_4(module_id_t mod_id,
   }
   /* phy-test has hardcoded allocation, so no use to handle CSI reports */
   if ((uci_234->pduBitmap >> 2) & 0x01 && !get_softmodem_params()->phy_test) {
-    //API to parse the csi report and store it into sched_ctrl
-    extract_pucch_csi_report(csi_MeasConfig, uci_234, frame, slot, UE, nrmac->common_channels->ServingCellConfigCommon);
-    //TCI handling function
-    tci_handling(UE,frame, slot);
+    if (uci_234->csi_part1.csi_part1_crc != 1) {
+      // API to parse the csi report and store it into sched_ctrl
+      extract_pucch_csi_report(csi_MeasConfig, uci_234, frame, slot, UE, nrmac->common_channels->ServingCellConfigCommon);
+      // TCI handling function
+      tci_handling(UE, frame, slot);
+    }
     free(uci_234->csi_part1.csi_part1_payload);
   }
   if ((uci_234->pduBitmap >> 3) & 0x01) {