[S] Change in osmo-hnbgw[master]: kpi_ranap: Avoid null pointer de-ref during HNB shutdown

laforge has uploaded this change for review. ( https://gerrit.osmocom.org/c/osmo-hnbgw/+/37530?usp=email ) Change subject: kpi_ranap: Avoid null pointer de-ref during HNB shutdown ...................................................................... kpi_ranap: Avoid null pointer de-ref during HNB shutdown In the downlink path, we cannot assume map->hnb_ctx is always non-NULL. If the HNB has just disconnected, it might be NULL, while we're still processing downlink messages from the CN which were sent by it before it realized that HNB was gone. Closes: SYS#7010 Change-Id: I9a304b9e0cbc18dbf7b699f4aae6b91ca0c16173 --- M src/osmo-hnbgw/kpi_ranap.c 1 file changed, 25 insertions(+), 0 deletions(-) git pull ssh://gerrit.osmocom.org:29418/osmo-hnbgw refs/changes/30/37530/1 diff --git a/src/osmo-hnbgw/kpi_ranap.c b/src/osmo-hnbgw/kpi_ranap.c index 59631cf..d731c5f 100644 --- a/src/osmo-hnbgw/kpi_ranap.c +++ b/src/osmo-hnbgw/kpi_ranap.c @@ -179,6 +179,13 @@ void kpi_ranap_process_dl(struct hnbgw_context_map *map, ranap_message *ranap) { + if (map->hnb_ctx == NULL) { + /* This can happen if the HNB has disconnected and we are processing downlink messages + * from the CN which were already in flight before the CN side has realized the HNB + * is gone. */ + return; + } + switch (ranap->procedureCode) { case RANAP_ProcedureCode_id_RAB_Assignment: /* RAB ASSIGNMENT REQ (8.2) */ kpi_ranap_process_dl_rab_ass_req(map, ranap); @@ -405,6 +412,9 @@ void kpi_ranap_process_ul(struct hnbgw_context_map *map, ranap_message *ranap) { + /* we should never be processing uplink messages from a non-existant HNB */ + OSMO_ASSERT(map->hnb_ctx); + switch (ranap->procedureCode) { case RANAP_ProcedureCode_id_RAB_Assignment: /* RAB ASSIGNMENT REQ (8.2) */ kpi_ranap_process_ul_rab_ass_resp(map, ranap); -- To view, visit https://gerrit.osmocom.org/c/osmo-hnbgw/+/37530?usp=email To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: osmo-hnbgw Gerrit-Branch: master Gerrit-Change-Id: I9a304b9e0cbc18dbf7b699f4aae6b91ca0c16173 Gerrit-Change-Number: 37530 Gerrit-PatchSet: 1 Gerrit-Owner: laforge <laforge(a)osmocom.org> Gerrit-MessageType: newchange