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Bug #4602
openSGSN crash with "Assert failed mm->gb.llme == NULL gprs_sgsn.c:358"
Start date:
06/08/2020
Due date:
% Done:
0%
Spec Reference:
Description
In a test lab installation using a non-osmocom BSS + 3G RAN, the SGSN every so often crashes with the following last lines:
The SGSN is crashing from time to time with:
Jun 08 15:23:56 osmo-cn osmo-sgsn[4976]: <0018> iu_client.c:547 handle_co_initial(dir=1, proc=19) Jun 08 15:23:56 osmo-cn osmo-sgsn[4976]: <0018> iu_client.c:174 New RNC 1203 at RI=2,PC=1204,SSN=142 Jun 08 15:23:56 osmo-cn osmo-sgsn[4976]: <0018> iu_client.c:257 RNC 1203: new LAC 123 RAC 1 Jun 08 15:23:56 osmo-cn osmo-sgsn[4976]: <0002> gprs_gmm.c:1561 MM(---/ffffffff) -> GMM RA UPDATE REQUEST type="periodic updating" Jun 08 15:23:56 osmo-cn osmo-sgsn[4976]: <0002> gprs_gmm.c:1636 MM(901700000040778/fa8d76a4) Looked up by matching TLLI and P_TMSI. BSSGP TLLI: 00000000, P-TMSI: fa8d76a4 (00000000), TLLI: fa8d76a4 (fa8d76a4), RA: 901-70-123-1 Jun 08 15:23:56 osmo-cn osmo-sgsn[4976]: <0002> gprs_gmm_fsm.c:170 MM_STATE_Gb(3572395996)[0x55d97cd93740]{Standby}: Event E_MM_IMPLICIT_DETACH not permitted Jun 08 15:23:56 osmo-cn osmo-sgsn[4976]: <0002> gprs_gmm.c:1099 GMM(gmm_fsm)[0x55d97cd93610]{CommonProcedureInitiated}: Event E_GMM_COMMON_PROC_INIT_REQ not permitted Jun 08 15:23:57 osmo-cn osmo-sgsn[4976]: <0018> iu_client.c:570 handle_co(dir=2, proc=6) Jun 08 15:23:57 osmo-cn osmo-sgsn[4976]: <0002> gprs_gmm.c:1430 MM(901700000040778/fa8d76a4) <- ROUTING AREA UPDATE ACCEPT Jun 08 15:23:57 osmo-cn osmo-sgsn[4976]: <0018> iu_client.c:570 handle_co(dir=1, proc=20) Jun 08 15:23:57 osmo-cn osmo-sgsn[4976]: <0002> gprs_gmm.c:1757 MM(901700000040778/fa8d76a4) -> ROUTING AREA UPDATE COMPLETE Jun 08 15:23:57 osmo-cn osmo-sgsn[4976]: <0002> gprs_gmm.c:1765 MM_STATE_Iu[0x55d97cd97350]{Detached}: Event E_PMM_RA_UPDATE not permitted Jun 08 15:25:50 osmo-cn osmo-sgsn[4976]: <0018> iu_client.c:570 handle_co(dir=1, proc=11) Jun 08 15:25:50 osmo-cn osmo-sgsn[4976]: <0018> iu_client.c:570 handle_co(dir=2, proc=1) Jun 08 15:25:50 osmo-cn osmo-sgsn[4976]: <0002> gprs_ranap.c:135 MM(901700000040778/fa8d76a4) IU release for imsi 901700000040778 Jun 08 15:28:15 osmo-cn osmo-sgsn[4976]: <0002> gprs_gmm.c:1021 MM(901700000040778/fa8d76a4) Cancelled, deleting context silently Jun 08 15:28:15 osmo-cn osmo-sgsn[4976]: <0002> gprs_gmm.c:193 MM(901700000040778/fa8d76a4) Cleaning MM context due to access cancelled Jun 08 15:28:15 osmo-cn osmo-sgsn[4976]: Assert failed mm->gb.llme == NULL gprs_sgsn.c:358
any ideas?
I will of course try to create better traces (combined pcap with GSMTAP libosmocore logs) but this may take some time.
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