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Cisco Bug: CSCvi72892 - WLC 8510 Crashed on Task emWeb While Removing Fabric Interface Configs and SNMP traps

Last Modified

Apr 25, 2018

Products (1)

  • Cisco 5500 Series Wireless Controllers

Known Affected Releases

8.5(124.36)

Description (partial)

Symptom:
WLC 8510 crashes with the following System Stack:
Timestamp:	Wed Mar 28 17:37:46 2018
SystemUpTime: 	1 days 11 hrs 58 mins 5 secs
signal:   	11
pid:      	1606
TID:      	-113371392
Task Name:	emWeb
Reason: 	System Crash
si_signo: 	11
si_errno: 	0
si_code:  	1
si_addr:  	0xcc00fff6
MON(R)  Tick:  	12928 2018-03-28 22:36:46.504740
MON(R)  ExitTick:  	12922
MON(RW) Tick:  	4308 2018-03-28 22:36:27.126289
MON(R)  Trigger:  	3
MON(R)  State:  	1

Long time taken timer call back information:
Time Stamp: 	Tue Mar 27 22:53:19 2018
timer cb  : 	0x7713c0('mldReportTimeoutExpired+0')
Duration  : 41286 usecs, cbCount= 5
Timer Current Time  :126707     secs

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Analysis of Failure:



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System Stack

Frame 0: 0x48500d backtrace_pbuff+278
Frame 1: 0x485e88 create_crash_dump+1314
Frame 2: 0x47ffd0 sigsegv_handler+3178
Frame 3: 0x3ba6c0f170 bn_gather5+256165869136
Frame 4: 0x1a67fd0 CmpOctetStrings+0
Frame 5: 0x1f228f8 CmpIndices+200
Frame 6: 0x1f22a77 TableLookup+103
Frame 7: 0x1a65663 ManageCommunityEntry+915
Frame 8: 0x1abb87d TrapReceiverTableDelete+525
Frame 9: 0x11618a6 SnmpTrapReceiverTableDelete+52
Frame 10: 0x1162c03 SnmpTrapMgrStatusSet+507
Frame 11: 0x149de45 usmDbTrapManagerStatusIpSet+92
Frame 12: 0x1e39e3e ewaFormSubmit_trap_recvr_cfg_list+667
Frame 13: 0x1146be9 ewsServeSubmitForm+9
Frame 14: 0x1141089 ewsParse+7897
Frame 15: 0x11319b8 ewsRun+536
Frame 16: 0x112d3d3 ewmain+2099
Frame 17: 0x11532ad emweb_main+317
Frame 18: 0x11da7d3 gettid+195
Frame 19: 0x3ba6c07dff bn_gather5+256165839583
Frame 20: 0x7f2f0df8439d bn_gather5+139840039700605

Conditions:
Shortly after removing some fabric interface configs and SNMP traps from the WLC.  The WLC was also just recently removed from DNAC provisioning.
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