[jira] [Updated] (TS-4232) Crash in HostDB，During debug message generating

["Leif Hedstrom (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/TS-4232?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Leif Hedstrom updated TS-4232:
------------------------------
    Assignee: Thomas Jackson

> Crash in HostDB，During debug message generating
> -----------------------------------------------
>
>                 Key: TS-4232
>                 URL: https://issues.apache.org/jira/browse/TS-4232
>             Project: Traffic Server
>          Issue Type: Bug
>          Components: HostDB
>            Reporter: Oknet Xu
>            Assignee: Thomas Jackson
>              Labels: crash
>             Fix For: 6.2.0
>
>
> STACK TRACE：
> {code}
> /usr/bin/traffic_server(crash_logger_invoke(int, siginfo_t*, void*)+0xa2)[0x7fec78d2cf52]
> /lib/x86_64-linux-gnu/libpthread.so.0(+0xf8d0)[0x7fec76cfb8d0]
> /usr/bin/traffic_server(+0x2acc5f)[0x7fec78edec5f]
> /usr/bin/traffic_server(HostDBContinuation::dnsEvent(int, HostEnt*)+0x370)[0x7fec78ee3130]
> /usr/bin/traffic_server(DNSEntry::postEvent(int, Event*)+0x4b)[0x7fec78ec8feb]
> /usr/bin/traffic_server(EThread::process_event(Event*, int)+0x90)[0x7fec78fa4ee0]
> /usr/bin/traffic_server(EThread::execute()+0x67f)[0x7fec78fa5aef]
> /usr/bin/traffic_server(+0x3722da)[0x7fec78fa42da]
> /lib/x86_64-linux-gnu/libpthread.so.0(+0x80a4)[0x7fec76cf40a4]
> /lib/x86_64-linux-gnu/libc.so.6(clone+0x6d)[0x7fec75ca204d]
> Segmentation fault (core dumped)
> {code}
> gdb with core file
> {code}
> Core was generated by `/usr/bin/traffic_server'.
> Program terminated with signal 11, Segmentation fault.
> #0  0x00007fec78edec5f in reply_to_cont (is_srv=false, r=0x7fec718beec0, cont=0x7fec6d375a10) at HostDB.cc:612
> 612         Debug("hostdb", "RR of %d with %d good, 1st IP = %s", r->rr()->rrcount, r->rr()->good, ats_ip_ntop(r->ip(), ipb, sizeof ipb))
> (gdb) bt
> #0  0x00007fec78edec5f in reply_to_cont (is_srv=false, r=0x7fec718beec0, cont=0x7fec6d375a10) at HostDB.cc:612
> #1  reply_to_cont (cont=0x7fec6d375a10, r=0x7fec718beec0, is_srv=false) at HostDB.cc:585
> #2  0x00007fec78ee3130 in HostDBContinuation::dnsEvent (this=<optimized out>, event=<optimized out>, e=<optimized out>)
>     at HostDB.cc:1682
> #3  0x00007fec78ec8feb in handleEvent (data=<optimized out>, event=600, this=<optimized out>)
>     at ../../iocore/eventsystem/I_Continuation.h:146
> #4  DNSEntry::postEvent (this=0x7fec6d236b10) at DNS.cc:1267
> #5  0x00007fec78fa4ee0 in handleEvent (data=0x7fec64164fe0, event=1, this=<optimized out>) at I_Continuation.h:146
> #6  EThread::process_event (this=this@entry=0x7fec73e3f010, e=e@entry=0x7fec64164fe0, calling_code=1) at UnixEThread.cc:131
> #7  0x00007fec78fa5aef in EThread::execute (this=0x7fec73e3f010) at UnixEThread.cc:182
> #8  0x00007fec78fa42da in spawn_thread_internal (a=0x7fec7b6d1af0) at Thread.cc:86
> #9  0x00007fec76cf40a4 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
> #10 0x00007fec75ca204d in clone () from /lib/x86_64-linux-gnu/libc.so.6
> (gdb) p r
> $1 = (HostDBInfo *) 0x7fec718beec0
> (gdb) p *r
> Cannot access memory at address 0x7fec718beec0
> (gdb) p ipb
> $2 = "175.25.168.40\000\000\000p+\377x\354\177\000\000\366\377\377\377\000\000\000\000 \367\025d\354\177\000\000\240\234\243s\354\177"
> {code}



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