Fix memory leak in nr_rrc_process_dedicatedNAS_MessageList

The leak was caused by improper memory ownership handling in the
dedicatedNAS_MessageList processing. The function was transferring
buffer ownership to NAS messages and then preventing ASN.1 cleanup
from freeing the original allocations by setting
list.count = 0, causing a memory leak.

Leak trace:
Direct leak of 40 byte(s) in 1 object(s) allocated from:
    /#0 0x7f2ce3ab4a57 in __interceptor_calloc ../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:154
    /#1 0x567907083f0f in OCTET_STRING_decode_uper /cmake_targets/ran_build/build/openair2/RRC/LTE/MESSAGES/OCTET_STRING_uper.c:89
    /#2 0x5679070ed5e6 in SET_OF_decode_uper /cmake_targets/ran_build/build/openair2/RRC/NR/MESSAGES/constr_SET_OF_uper.c:70
    /#3 0x56790707b6dc in SEQUENCE_decode_uper /cmake_targets/ran_build/build/openair2/RRC/LTE/MESSAGES/constr_SEQUENCE_uper.c:118
    /#4 0x56790707b6dc in SEQUENCE_decode_uper /cmake_targets/ran_build/build/openair2/RRC/LTE/MESSAGES/constr_SEQUENCE_uper.c:118
    /#5 0x56790709a403 in CHOICE_decode_uper /cmake_targets/ran_build/build/openair2/RRC/LTE/MESSAGES/constr_CHOICE_uper.c:84
    /#6 0x56790707b6dc in SEQUENCE_decode_uper /cmake_targets/ran_build/build/openair2/RRC/LTE/MESSAGES/constr_SEQUENCE_uper.c:118
    /#7 0x56790709a403 in CHOICE_decode_uper /cmake_targets/ran_build/build/openair2/RRC/LTE/MESSAGES/constr_CHOICE_uper.c:84
    /#8 0x56790709a403 in CHOICE_decode_uper /cmake_targets/ran_build/build/openair2/RRC/LTE/MESSAGES/constr_CHOICE_uper.c:84
    /#9 0x56790707b6dc in SEQUENCE_decode_uper /cmake_targets/ran_build/build/openair2/RRC/LTE/MESSAGES/constr_SEQUENCE_uper.c:118
    /#10 0x56790708b5f1 in uper_decode /cmake_targets/ran_build/build/openair2/RRC/LTE/MESSAGES/uper_decoder.c:83
    /#11 0x567906d44b4b in nr_rrc_ue_decode_dcch /openair2/RRC/NR_UE/rrc_UE.c:2212
    /#12 0x567906d520a3 in rrc_nrue /openair2/RRC/NR_UE/rrc_UE.c:2615
    /#13 0x567906d5f77e in rrc_nrue_task /openair2/RRC/NR_UE/rrc_UE.c:2501
    /#14 0x7f2ce2494ac2 in start_thread nptl/pthread_create.c:442

Fix:
- Copy OCTET_STRING data instead of transferring ownership
- Allow ASN.1 cleanup to properly free original allocations

This fixes the leak that occurred during rrcReconfiguration
message processing when dedicatedNAS_MessageList was present.

Closes #828

openair2/RRC/NR_UE/rrc_UE.c

@@ -607,10 +607,10 @@ static void nr_rrc_process_dedicatedNAS_MessageList(NR_UE_RRC_INST_t *rrc, NR_RR
       nas_establish_cnf_t *msg = &NAS_CONN_ESTABLI_CNF(ittiMsg);
       msg->errCode = AS_SUCCESS;
       msg->nasMsg.length = tmp->list.array[i]->size;
-      msg->nasMsg.nas_data = tmp->list.array[i]->buf;
+      msg->nasMsg.nas_data = malloc_or_fail(msg->nasMsg.length);
+      memcpy(msg->nasMsg.nas_data, tmp->list.array[i]->buf, msg->nasMsg.length);
       itti_send_msg_to_task(TASK_NAS_NRUE, rrc->ue_id, ittiMsg);
     }
-    tmp->list.count = 0; // to prevent the automatic free by ASN1_FREE
   }
 }