Hi Esa, thanks for providing these stack traces. This is an issue in PTLib where a fix for a memory leak seems to have unwated side effects. I have reverted the patch and now the leak is back, but its not crashing anymore. Regards, Jan -- Jan Willamowius, Founder of the GNU Gatekeeper Project EMail : jan@xxxxxxxxxxxxxx Website: https://www.gnugk.org Support: https://www.willamowius.com/gnugk-support.html Relaxed Communications GmbH Frahmredder 91 22393 Hamburg Geschäftsführer: Jan Willamowius HRB 125261 (Amtsgericht Hamburg) USt-IdNr: DE286003584 Esa Nyrhinen wrote: > Hi, > > Running GnuGk 4.8 on a Debian 8.10. > Compiled as "debugnoshared" along with its dependencies but the issue is > repeatable with GnuGk and its dependencies compiled as "optnoshared" too > and regardless of if GnuGk is run as root or a limited user. > > Configured as a H.460.18/19 client gatekeeper so it refers to its parent > via DNS & SRV records. Crashes either on start or reload depending on > TraceLevel=. > > The IPs and DNS names have been replaced in the output below. > > With TraceLevel=3 crashes on config reload via status port. > > The last line of the log is: > 2018/03/21 20:18:57.626 2 RasSrv.cxx(947) GK Home = > 1.2.3.4 > > The core dump says: > Program terminated with signal SIGABRT, Aborted. > #0 0x00007f978e85f067 in __GI_raise (sig=sig@entry=6) at > ../nptl/sysdeps/unix/sysv/linux/raise.c:56 > 56 ../nptl/sysdeps/unix/sysv/linux/raise.c: No such file or directory. > (gdb) bt > #0 0x00007f978e85f067 in __GI_raise (sig=sig@entry=6) at > ../nptl/sysdeps/unix/sysv/linux/raise.c:56 > #1 0x00007f978e860523 in __GI_abort () at abort.c:118 > #2 0x00007f978e89d1b4 in __libc_message (do_abort=do_abort@entry=1, > fmt=fmt@entry=0x7f978e992210 "*** Error in `%s': %s: 0x%s ***\n") at > ../sysdeps/posix/libc_fatal.c:175 > #3 0x00007f978e8a298e in malloc_printerr (action=1, str=0x7f978e98e326 > "free(): invalid pointer", ptr=<optimized out>) at malloc.c:4996 > #4 0x00007f978e8a3696 in _int_free (av=<optimized out>, p=<optimized > out>, have_lock=0) at malloc.c:3840 > #5 0x0000000000930db8 in DnsRecordListFree (rec=0x1bd8c40) at > ptclib/pdns.cxx:315 > #6 0x0000000000932609 in PDNS::Cached_DnsQuery (name=0x1b9c490 > "_h323rs._udp.example.com", type=33, options=0, queryResults=0x7f978c32c200) > at ptclib/pdns.cxx:711 > #7 0x000000000088305f in PDNS::Lookup<33u, PDNS::SRVRecordList, > PDNS::SRVRecord> (name=..., recordList=...) > at /home/asdf/gnugk/build/ptlib/include/ptclib/pdns.h:226 > #8 0x0000000000882a59 in PDNS::GetRecords (service=..., > serviceList=...) at /home/asdf/gnugk/build/ptlib/include/ptclib/pdns.h:287 > #9 0x0000000000931e9f in PDNS::LookupSRV (srvLookupStr=..., > defaultPort=1720, addrList=std::vector of length 0, capacity 0) at > ptclib/pdns.cxx:578 > #10 0x0000000000931e3a in PDNS::LookupSRV (domain=..., service=..., > defaultPort=1720, addrList=std::vector of length 0, capacity 0) at > ptclib/pdns.cxx:567 > #11 0x0000000000931926 in PDNS::LookupSRV (url=..., service=..., > returnList=...) at ptclib/pdns.cxx:529 > #12 0x00000000004d9a91 in GkClient::OnReload (this=0x1bd68c0) at > GkClient.cxx:1669 > #13 0x0000000000506dc1 in RasServer::LoadConfig (this=0x1bcce50) at > RasSrv.cxx:1044 > #14 0x00000000005978c0 in ReloadHandler () at gk.cxx:1095 > #15 0x0000000000462629 in StatusClient::ExecCommand > (this=0x7f976c004920, cmd=...) at GkStatus.cxx:1846 > #16 0x0000000000469837 in SimpleClassJobA<StatusClient, PString>::Run > (this=0x7f9764006780) at job.h:236 > #17 0x000000000040e5a3 in Worker::Main (this=0x7f976c006990) at job.cxx:182 > #18 0x000000000099892a in PThread::PX_ThreadStart (arg=0x7f976c006990) > at ptlib/unix/tlibthrd.cxx:493 > #19 0x00007f978fecd064 in start_thread (arg=0x7f978c32d700) at > pthread_create.c:309 > #20 0x00007f978e91262d in clone () at > ../sysdeps/unix/sysv/linux/x86_64/clone.S:111 > > With TraceLevel=6 the gatekeeper crashes on start. > > The lines of the log are: > 2018/03/21 20:44:31.680 4 pdns.cxx(566) DNS SRV > Lookup "_h323rs._udp.example.com" > 2018/03/21 20:44:31.680 5 pdns.cxx(727) DNS SRV > physical lookup "_h323rs._udp.example.com 33 0" > 2018/03/21 20:44:31.689 6 pdns.cxx(741) DNS Query > success: 0x2b94120 > 2018/03/21 20:44:31.689 6 pdns.cxx(744) DNS Query: > name="", type=0, len=0 > 2018/03/21 20:44:31.689 6 pdns.cxx(744) DNS Query: > name="^Z<F8>@", type=157, len=0 > 2018/03/21 20:44:31.689 6 pdns.cxx(744) DNS Query: > name="H<89>}<F8>H<8B>E<F8>H<C7>", type=4332, len=35144 > > Looking at the pdns.cxx sources it seems that the contents of the pName > field are garbled for some reason. > > Program terminated with signal SIGSEGV, Segmentation fault. > #0 0x00000000009328ff in PDNS::Cached_DnsQuery (name=0x2b57520 > "_h323rs._udp.example.com", type=33, options=0, queryResults=0x7ffe3b0fcf60) > at ptclib/pdns.cxx:743 > #1 0x000000000088305f in PDNS::Lookup<33u, PDNS::SRVRecordList, > PDNS::SRVRecord> (name=..., recordList=...) > at /home/asdf/gnugk/build/ptlib/include/ptclib/pdns.h:226 > #2 0x0000000000882a59 in PDNS::GetRecords (service=..., > serviceList=...) at /home/asdf/gnugk/build/ptlib/include/ptclib/pdns.h:287 > #3 0x0000000000931e9f in PDNS::LookupSRV (srvLookupStr=..., > defaultPort=1720, addrList=std::vector of length 0, capacity 0) at > ptclib/pdns.cxx:578 > #4 0x0000000000931e3a in PDNS::LookupSRV (domain=..., service=..., > defaultPort=1720, addrList=std::vector of length 0, capacity 0) at > ptclib/pdns.cxx:567 > #5 0x0000000000931926 in PDNS::LookupSRV (url=..., service=..., > returnList=...) at ptclib/pdns.cxx:529 > #6 0x00000000004d9a91 in GkClient::OnReload (this=0x2b91890) at > GkClient.cxx:1669 > #7 0x0000000000506dc1 in RasServer::LoadConfig (this=0x2b88740) at > RasSrv.cxx:1044 > #8 0x00000000005088a9 in RasServer::Run (this=0x2b88740) at RasSrv.cxx:1439 > #9 0x000000000059a50c in Gatekeeper::Main (this=0x2b61e90) at gk.cxx:1836 > #10 0x00000000009be043 in PProcess::InternalMain (this=0x2b61e90) at > ptlib/common/osutils.cxx:1540 > #11 0x0000000000596913 in main (argc=3, argv=0x7ffe3b0fdfe8, > envp=0x7ffe3b0fe008) at gk.cxx:53 > > Regards, > Esa _______________________________________________________ Posting: mailto:gnugk-users@xxxxxxxxxxxxxxx Archive: https://lists.gnugk.org/pipermail/gnugk-users/ Unsubscribe: https://lists.gnugk.org/lists/listinfo/gnugk-users Homepage: https://www.gnugk.org/
