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Cisco Bug: CSCun18697 - TFTP core while performing write operation on invalid file descriptor

Last Modified

May 09, 2019

Products (1)

  • Cisco Unified Communications Manager (CallManager)

Known Affected Releases

9.1(2.10000.28)

Description (partial)

Symptom:
Proxy TFTP server creating core dumps when performing write operation :

11:59:36.281 |AppInfo |-->ClusterClient::decodeHttpHdr
01363717.002 |11:59:36.281 |AppInfo | ClusterClient::decodeHttpHdr SERVE_QUERY: Writing Dynamic file

utils core analyze from CLI shows:

backtrace
===================================
#0 0x009cde31 in fwrite () from /lib/libc.so.6
#1 0x081d4c42 in Writer::PersistFile(WriterAction, char const*, unsigned int, CWriterInfo&) ()
#2 0x081d6574 in Writer::wait_WriteReq(SdlSignal&) ()
#3 0x081d6d84 in Writer::fireSignal(SdlSignal&) ()
#4 0x088013e5 in SdlProcessBase::inputSignal(SdlSignal*, SdlSystemLog::SignalTraceType, int, int, int, int, int, int) ()
#5 0x08830d39 in SdlThreadedProcess::threadQueueReader() ()
#6 0x08830f7f in SdlThreadedProcess::threadQueueReaderInit(SdlThreadedProcess*) ()
#7 0x002f16e1 in start_thread () from /lib/libpthread.so.0
#8 0x00a49d3e in clone () from /lib/libc.so.6

Conditions:
1. proxy TFTP configured
2. files do not exist on the proxy TFTP server so files must be retrieved from remote TFTP server

Those files may be locale files or other files such as gkdefault.cfg.
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