add mutex for input_sdus in rlc to try to avoid segfault

openair2/LAYER2/RLC/AM_v9.3.0/rlc_am.c

@@ -527,7 +527,7 @@ rlc_am_mac_status_indication (
 
     status_resp.buffer_occupancy_in_bytes += (header_overhead + max_li_overhead);
   }
-
+  RLC_AM_MUTEX_LOCK(&rlc->lock_input_sdus, ctxt_pP, rlc);
   if ((rlc->input_sdus[rlc->current_sdu_index].mem_block != NULL) && (status_resp.buffer_occupancy_in_bytes)) {
     //status_resp.buffer_occupancy_in_bytes += ((rlc_am_entity_t *) rlc)->tx_header_min_length_in_bytes;
     status_resp.buffer_occupancy_in_pdus = rlc->nb_sdu;
@@ -553,7 +553,7 @@ rlc_am_mac_status_indication (
       status_resp.head_sdu_is_segmented = 1;
     }
   }
-
+  RLC_AM_MUTEX_UNLOCK(&rlc->lock_input_sdus);
   if (MESSAGE_CHART_GENERATOR) {
     MSC_LOG_RX_MESSAGE(
       (ctxt_pP->enb_flag == ENB_FLAG_YES) ? MSC_RLC_ENB:MSC_RLC_UE,

openair2/LAYER2/RLC/UM_v9.3.0/rlc_um.c

@@ -388,7 +388,7 @@ rlc_um_mac_status_indication (const protocol_ctxt_t *const ctxt_pP, void *rlc_pP
     rlc_um_check_timer_dar_time_out(ctxt_pP, rlc_p);
     rlc_p->nb_bytes_requested_by_mac = tbs_sizeP;
     status_resp.buffer_occupancy_in_bytes = rlc_um_get_buffer_occupancy (rlc_p);
-
+    RLC_UM_MUTEX_LOCK(&rlc_p->lock_input_sdus, ctxt_pP, rlc_p);
     if ((status_resp.buffer_occupancy_in_bytes > 0) && ((mb_p = list_get_head(&rlc_p->input_sdus)) != NULL)) {
       if (enb_flagP == ENB_FLAG_YES) {
         /* For eNB: add minimum RLC UM header size for the scheduler */
@@ -411,7 +411,7 @@ rlc_um_mac_status_indication (const protocol_ctxt_t *const ctxt_pP, void *rlc_pP
       }
     } else {
     }
-
+    RLC_UM_MUTEX_UNLOCK(&rlc_p->lock_input_sdus);
     status_resp.rlc_info.rlc_protocol_state = rlc_p->protocol_state;
 
     if (LOG_DEBUGFLAG(DEBUG_RLC)) {