root@all:~# coredumpctl debug 
           PID: 26824 (rpc.gssd)
           UID: 0 (root)
           GID: 0 (root)
        Signal: 11 (SEGV)
     Timestamp: Sat 2020-10-03 10:29:16 CEST (5h 38min ago)
  Command Line: /usr/sbin/rpc.gssd -vvvvvvv -rrrrrrr -t 3600 -T 10
    Executable: /usr/sbin/rpc.gssd
 Control Group: /system.slice/rpc-gssd.service
          Unit: rpc-gssd.service
         Slice: system.slice
       Boot ID: e60fc71ee667413c98017762004c67f2
    Machine ID: d3d1247edbd7490591d291e33e196b79
      Hostname: all
       Storage: 
/var/lib/systemd/coredump/core.rpc\x2egssd.0.e60fc71ee667413c98017762004c67f2.26824.1601713756000000.lz4
       Message: Process 26824 (rpc.gssd) of user 0 dumped core.
                
                Stack trace of thread 4596:
                #0  0x0000563f504ab38e create_auth_rpc_client (rpc.gssd)
                #1  0x0000563f504ab9f8 krb5_use_machine_creds (rpc.gssd)
                #2  0x0000563f504abb92 process_krb5_upcall (rpc.gssd)
                #3  0x0000563f504ac3b3 handle_gssd_upcall (rpc.gssd)
                #4  0x00007f13dcd4dfa3 start_thread (libpthread.so.0)
                #5  0x00007f13dcc7e4cf __clone (libc.so.6)
                
                Stack trace of thread 26824:
                #0  0x00007f13dcc73819 __GI___poll (libc.so.6)
                #1  0x00007f13dcb59207 send_dg (libresolv.so.2)
                #2  0x00007f13dcb56c43 __GI___res_context_query (libresolv.so.2)
                #3  0x00007f13dcb31536 __GI__nss_dns_gethostbyaddr2_r 
(libnss_dns.so.2)
                #4  0x00007f13dcb31823 _nss_dns_gethostbyaddr_r 
(libnss_dns.so.2)
                #5  0x00007f13dcc8fee2 __gethostbyaddr_r (libc.so.6)
                #6  0x00007f13dcc987d5 gni_host_inet_name (libc.so.6)
                #7  0x0000563f504aa455 gssd_get_servername (rpc.gssd)
                #8  0x0000563f504aa82c gssd_read_service_info (rpc.gssd)
                #9  0x0000563f504ab067 gssd_inotify_clnt (rpc.gssd)
                #10 0x00007f13dcf269ba event_persist_closure (libevent-2.1.so.6)
                #11 0x00007f13dcf27537 event_process_active (libevent-2.1.so.6)
                #12 0x0000563f504a8eaa main (rpc.gssd)
                #13 0x00007f13dcba909b __libc_start_main (libc.so.6)
                #14 0x0000563f504a903a _start (rpc.gssd)

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Reading symbols from /usr/sbin/rpc.gssd...Reading symbols from 
/usr/lib/debug/.build-id/97/484761d181f6a900fc8e41e4ff6cf038e00e4c.debug...done.
done.
[New LWP 4596]
[New LWP 26824]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `/usr/sbin/rpc.gssd -vvvvvvv -rrrrrrr -t 3600 -T 10'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x0000563f504ab38e in create_auth_rpc_client (clp=clp@entry=0x563f50687c30, 
tgtname=tgtname@entry=0x563f5069e67f "h...@client.domain.tu-berlin.de", 
clnt_return=clnt_return@entry=0x7f13dcb2cde8, 
auth_return=auth_return@entry=0x7f13dcb2cd50, uid=uid@entry=0, 
cred=cred@entry=0x0, authtype=0) at gssd_proc.c:352
352     gssd_proc.c: No such file or directory.
[Current thread is 1 (Thread 0x7f13dcb2d700 (LWP 4596))]
(gdb) set pagination off
(gdb) bt full
#0  0x0000563f504ab38e in create_auth_rpc_client (clp=clp@entry=0x563f50687c30, 
tgtname=tgtname@entry=0x563f5069e67f "h...@client.domain.tu-berlin.de", 
clnt_return=clnt_return@entry=0x7f13dcb2cde8, 
auth_return=auth_return@entry=0x7f13dcb2cd50, uid=uid@entry=0, 
cred=cred@entry=0x0, authtype=0) at gssd_proc.c:352
        rpc_clnt = 0x0
        sec = {mech = 0x563f504b7590 <krb5oid>, qop = 0, svc = 
RPCSEC_GSS_SVC_NONE, cred = 0x7f13d80024d0, req_flags = 2}
        auth = 0x0
        retval = -1
        min_stat = 256
        rpc_errmsg = '\000' <repeats 13 times>, 
"\001\000\000`\314û6إ{k\006\333m\376\225C\362L\252\206\062\312\065\377\236\272a\271M\212{\245=iٞ\230\243\066\226\200\377s\345\334\023\177\000\000d\366\202y\275b\311\365\370N\306cR\341\352Zj=\244@e19m\330\320\342\035\225\266\362^oBQ\246f\n\230\065\255a%\177)\364\064\371\230\356\217\375|\327֢\377s\345\334\023\177\000\000P\263\337nI;\v\237\313\222n4'Ǧ\324\330'aA\225\207\017\210T\222\065\202\005̜\304\023l\326\024D\034\324\063\366\032(\341\231\335\030B|\243\357\334i\000\215\327\362x\201\177C\031\375\242\017\t\201\036_\300$\000\330\023\177\000\000"...
        protocol = 6
        timeout = {tv_sec = -705504076444949378, tv_usec = 6203012124671966628}
        addr = 0x563f50687d88
        salen = <optimized out>
#1  0x0000563f504ab9f8 in krb5_use_machine_creds (clp=clp@entry=0x563f50687c30, 
uid=uid@entry=0, tgtname=tgtname@entry=0x563f5069e67f 
"h...@client.domain.tu-berlin.de", service=service@entry=0x563f5069e6a3 "nfs", 
rpc_clnt=rpc_clnt@entry=0x7f13dcb2cde8) at gssd_proc.c:558
        min_stat = 0
        auth = 0x0
        credlist = 0x7f13d8004a00
        ccname = 0x7f13d8004a00
        nocache = <optimized out>
        success = 0
#2  0x0000563f504abb92 in process_krb5_upcall (clp=clp@entry=0x563f50687c30, 
uid=uid@entry=0, fd=10, tgtname=tgtname@entry=0x563f5069e67f 
"h...@client.domain.tu-berlin.de", service=service@entry=0x563f5069e6a3 "nfs") 
at gssd_proc.c:646
        rpc_clnt = 0x0
        auth = <optimized out>
        pd = {pd_ctx = 0x0, pd_ctx_hndl = {length = 0, value = 0x0}, pd_seq_win 
= 0}
        token = {length = 0, value = 0x0}
        err = 1349117544
        downcall_err = -13
        maj_stat = <optimized out>
        min_stat = 1349108960
        lifetime_rec = 22079
        gacceptor = 0x0
        mech = 0x7f13d8000020
        acceptor = {length = 0, value = 0x0}
#3  0x0000563f504ac3b3 in handle_gssd_upcall (info=0x563f5069e660) at 
gssd_proc.c:805
        clp = 0x563f50687c30
        uid = 0
        p = 0x563f5069e677 ""
        mech = <optimized out>
        uidstr = <optimized out>
        target = 0x563f5069e67f "h...@client.domain.tu-berlin.de"
        service = 0x563f5069e6a3 "nfs"
        enctypes = 0x563f5069e6b0 "18,17,16,23,3,1,2"
        upcall_str = 0x7f13d8025f50 "mech=krb5 uid=0 
target=h...@client.domain.tu-berlin.de service=nfs enctypes=18,17,16,23,3,1,2 "
        pbuf = 0x0
        __func__ = "handle_gssd_upcall"
#4  0x00007f13dcd4dfa3 in start_thread (arg=<optimized out>) at 
pthread_create.c:486
        ret = <optimized out>
        pd = <optimized out>
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139723283814144, 
-6716850532091874603, 140727067529374, 140727067529375, 139723283814144, 
94829932045632, 6696656257836987093, 6696656584800940757}, mask_was_saved = 
0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, 
canceltype = 0}}}
        not_first_call = <optimized out>
#5  0x00007f13dcc7e4cf in clone () at 
../sysdeps/unix/sysv/linux/x86_64/clone.S:95
No locals.
(gdb) thread apply all bt full

Thread 2 (Thread 0x7f13dcb4b740 (LWP 26824)):
#0  0x00007f13dcc73819 in __GI___poll (fds=fds@entry=0x7ffd92dea918, 
nfds=nfds@entry=1, timeout=5000, timeout@entry=<error reading variable: That 
operation is not available on integers of more than 8 bytes.>) at 
../sysdeps/unix/sysv/linux/poll.c:29
        resultvar = 18446744073709551100
        sc_cancel_oldtype = 0
        sc_ret = <optimized out>
#1  0x00007f13dcb59207 in send_dg (ansp2_malloced=<optimized out>, 
resplen2=<optimized out>, anssizp2=<optimized out>, ansp2=<optimized out>, 
anscp=<optimized out>, gotsomewhere=<synthetic pointer>, v_circuit=<synthetic 
pointer>, ns=<optimized out>, terrno=0x7ffd92dea8d8, anssizp=0x7ffd92deaa10, 
ansp=0x7ffd92dea8c8, buflen2=<optimized out>, buf2=<optimized out>, 
buflen=<optimized out>, buf=<optimized out>, statp=<optimized out>) at 
res_send.c:1112
        hp = <optimized out>
        from = {sin6_family = 30496, sin6_port = 20584, sin6_flowinfo = 22079, 
sin6_addr = {__in6_u = {__u6_addr8 = 
"\353h\265\334\023\177\000\000\063\000\000\000\000\000\000", __u6_addr16 = 
{26859, 56501, 32531, 0, 51, 0, 0, 0}, __u6_addr32 = {3702876395, 32531, 51, 
0}}}, sin6_scope_id = 3703573230}
        seconds = <optimized out>
        retval = <optimized out>
        recvresp1 = <optimized out>
        n = <optimized out>
        single_request_reopen = <optimized out>
        recvresp2 = <optimized out>
        timeout = {tv_sec = 5, tv_nsec = 0}
        save_gotsomewhere = <optimized out>
        hp2 = <optimized out>
        finish = {tv_sec = <optimized out>, tv_nsec = 45580000}
        pfd = {{fd = 15, events = 1, revents = 0}}
        resplen = 0
        single_request = <optimized out>
        now = {tv_sec = 1601713756, tv_nsec = 45580000}
        ptimeout = <optimized out>
        need_recompute = 0
        nwritten = <optimized out>
        hp = <optimized out>
        hp2 = <optimized out>
        now = <optimized out>
        timeout = <optimized out>
        finish = <optimized out>
        pfd = <optimized out>
        ptimeout = <optimized out>
        from = <optimized out>
        resplen = <optimized out>
        n = <optimized out>
        seconds = <optimized out>
        single_request_reopen = <optimized out>
        single_request = <optimized out>
        save_gotsomewhere = <optimized out>
        retval = <optimized out>
        need_recompute = <optimized out>
        nwritten = <optimized out>
        recvresp1 = <optimized out>
        recvresp2 = <optimized out>
        __PRETTY_FUNCTION__ = "send_dg"
        iov = <optimized out>
        iov2 = <optimized out>
        reqs = <optimized out>
        ndg = <optimized out>
        sr = <optimized out>
        thisanssizp = <optimized out>
        thisansp = <optimized out>
        thisresplenp = <optimized out>
        anhp = <optimized out>
        fromlen = <optimized out>
        newp = <optimized out>
#2  __res_context_send (ctx=ctx@entry=0x563f50687720, 
buf=buf@entry=0x7ffd92deaa40 "\203y\001", buflen=buflen@entry=45, 
buf2=buf2@entry=0x0, buflen2=buflen2@entry=0, ans=<optimized out>, 
ans@entry=0x7ffd92deac40 "\303D\205\200", anssiz=<optimized out>, 
ansp=<optimized out>, ansp2=<optimized out>, nansp2=<optimized out>, 
resplen2=<optimized out>, ansp2_malloced=<optimized out>) at res_send.c:519
        ns = <optimized out>
        ns_shift = <optimized out>
        statp = <optimized out>
        gotsomewhere = <optimized out>
        terrno = 110
        try = <optimized out>
        v_circuit = 0
        resplen = <optimized out>
        n = <optimized out>
        ns_offset = <optimized out>
#3  0x00007f13dcb56c43 in __GI___res_context_query 
(ctx=ctx@entry=0x563f50687720, name=name@entry=0x7ffd92deb0b0 
"XX.XX.149.130.in-addr.arpa", class=class@entry=1, type=type@entry=12, 
answer=0x7ffd92deac40 "\303D\205\200", anslen=anslen@entry=1024, 
answerp=0x7ffd92deb0a8, answerp2=0x0, nanswerp2=0x0, resplen2=0x0, 
answerp2_malloced=0x0) at res_query.c:216
        statp = 0x7f13dcd44900 <_res>
        hp = 0x7ffd92deac40
        hp2 = <optimized out>
        n = <optimized out>
        use_malloc = 0
        bufsize = <optimized out>
        buf = 0x7ffd92deaa40 "\203y\001"
        query1 = 0x7ffd92deaa40 "\203y\001"
        nquery1 = <optimized out>
        query2 = 0x0
        nquery2 = 0
        __PRETTY_FUNCTION__ = "__res_context_query"
#4  0x00007f13dcb31536 in __GI__nss_dns_gethostbyaddr2_r (addr=<optimized out>, 
len=<optimized out>, af=<optimized out>, result=0x7ffd92deb650, 
buffer=0x7ffd92deb810 "\377\002", buflen=1024, errnop=0x7f13dcb4b6a0, 
h_errnop=0x7ffd92deb63c, ttlp=0x0) at nss_dns/dns-host.c:536
        mapped = "\000\000\000\000\000\000\000\000\000\000\377\377"
        tunnelled = '\000' <repeats 11 times>
        v6local = "\000\000\000\001"
        uaddr = <optimized out>
        host_data = 0x7ffd92deb810
        host_buffer = {buf = 0x7ffd92deac40, ptr = 0x7ffd92deac40 
"\303D\205\200"}
        orig_host_buffer = 0x7ffd92deac40
        qbuf = "XX.XX.149.130.in-addr.arpa", '\000' <repeats 189 times>...
        qp = <optimized out>
        size = <optimized out>
        n = <optimized out>
        status = <optimized out>
        olderr = 22
        pad = 0
        ctx = 0x563f50687720
#5  0x00007f13dcb31823 in _nss_dns_gethostbyaddr_r (addr=<optimized out>, 
len=<optimized out>, af=<optimized out>, result=<optimized out>, 
buffer=<optimized out>, buflen=<optimized out>, errnop=0x7f13dcb4b6a0, 
h_errnop=0x7ffd92deb63c) at nss_dns/dns-host.c:576
No locals.
#6  0x00007f13dcc8fee2 in __gethostbyaddr_r (addr=addr@entry=0x563f50687d8c, 
len=len@entry=4, type=type@entry=2, resbuf=resbuf@entry=0x7ffd92deb650, 
buffer=<optimized out>, buflen=<optimized out>, result=<optimized out>, 
h_errnop=<optimized out>) at ../nss/getXXbyYY_r.c:315
        startp_initialized = true
        startp = 0xeb654d79e8532d5
        start_fct = 0x5cef4d602ca532d5
        nip = 0x563f50689ef0
        do_merge = 0
        mergegrp = <optimized out>
        mergebuf = 0x0
        endptr = 0x0
        fct = {l = 0x7f13dcb31810 <_nss_dns_gethostbyaddr_r>, ptr = 
0x7f13dcb31810 <_nss_dns_gethostbyaddr_r>}
        no_more = 0
        err = <optimized out>
        status = NSS_STATUS_UNAVAIL
        nscd_status = <optimized out>
        any_service = true
        res_ctx = <optimized out>
        res = <optimized out>
#7  0x00007f13dcc987d5 in gni_host_inet_name (addrlen=<optimized out>, flags=8, 
hostlen=1025, host=0x7ffd92debc90 "client.domain.tu-berlin.de", 
sa=0x563f50687d88, tmpbuf=0x7ffd92deb800) at ../include/scratch_buffer.h:101
        sinp = <optimized out>
        herrno = 1
        th = {h_name = 0x7ffd92deb838 "ip6-allrouters", h_aliases = 
0x7ffd92deb860, h_addrtype = 2, h_length = 4, h_addr_list = 0x7ffd92deb820}
        h = 0x0
        herrno = <optimized out>
        th = <optimized out>
        h = <optimized out>
        sin6p = <optimized out>
        sinp = <optimized out>
        c = <optimized out>
        do_idn = <optimized out>
        h_name = <optimized out>
        len = <optimized out>
        rc = <optimized out>
#8  gni_host_inet (addrlen=<optimized out>, flags=8, hostlen=1025, 
host=0x7ffd92debc90 "client.domain.tu-berlin.de", sa=0x563f50687d88, 
tmpbuf=0x7ffd92deb800) at getnameinfo.c:367
        result = <optimized out>
#9  gni_host (addrlen=<optimized out>, flags=8, hostlen=1025, 
host=0x7ffd92debc90 "client.domain.tu-berlin.de", sa=0x563f50687d88, 
tmpbuf=0x7ffd92deb800) at getnameinfo.c:409
No locals.
#10 __GI_getnameinfo (sa=0x563f50687d88, addrlen=<optimized out>, 
host=0x7ffd92debc90 "client.domain.tu-berlin.de", hostlen=1025, serv=0x0, 
servlen=0, flags=8) at getnameinfo.c:523
        result = <optimized out>
        tmpbuf = {data = 0x7ffd92deb810, length = 1024, __space = {__align = 
{__max_align_ll = 767, __max_align_ld = 5.12978240658353772249e-4937}, __c = 
"\377\002", '\000' <repeats 13 times>, "\002\020\270ޒ\375\177", '\000' <repeats 
11 times>, 
"f02::2\000ip6-allrouters\000\000calhost\000ip6-loopback\000\000apB\270ޒ\375\177\000\000P\270ޒ\375\177\000\000\000\000\000\000\000\000\000\000\364\270ޒ\375\177\000\000p\273ޒ\375\177\000\000\200=\320\334\023\177\000\000
 
\274ޒ\375\177\000\000p\274ޒ\375\177\000\000\020\301ޒ\375\177\000\000\347\311\311\334\023\177\000\000\300\277ޒ\375\177\000\000\020\301ޒ\375\177\000\000p\273ޒ\375\177\000\000\002",
 '\000' <repeats 15 times>, 
"\202w\306\334\023\177\000\000\000\000\000\000\000\000\000\000"...}}
#11 0x0000563f504aa455 in gssd_get_servername (name=<optimized out>, 
sa=0x563f50687d88, addr=0x563f5069d990 "130.149.X.X") at gssd.c:225
        addrlen = <optimized out>
        err = <optimized out>
        hbuf = 
"client.domain.tu-berlin.de\000e\000e\000\000e\000\000\000\060\000\000\000\060\000\000\000\354\366\026\335\023\177\000\000\000\000\000\000\000\000\000\000\353\001\000\000\000\000\000\000\000u\326\334\023\177\000\000\001\000\000\000\000\000\000\000\200r\270\334\023\177\000\000\364\372\026\335\023\177\000\000\353\001\000\000\000\000\000\000\346\030\304\334\023\177\000\000\000u\326\334\023\177\000\000\002\000\000\000\000\000\000\000p\277ޒ\375\177\000\000@\333\323\334\023\177\000\000'\277ޒ\375\177\000\000\060\216hP?V\000\000\357\037\000\000\000\000\000\000\241\\JP?V\000\000\233\326\067\314\n\000\000\000\002\000\000\000\375\177\000\000\001\000\000\000\000\000\000\000P\276"...
        buf = "\202\225\247^?V\000\000\000\000\000\000\000\000\000"
#12 0x0000563f504aa82c in gssd_read_service_info (clp=0x563f50687c30, dirfd=10) 
at gssd.c:326
        server = 0x563f50694370 "130.149.X.X"
        fd = <optimized out>
        info = 0x563f50686790
        numfields = <optimized out>
        servername = 0x0
        service = 0x563f50687b90 "nfs4_cb"
        program = 1073741824
        version = 1
        address = 0x563f5069d990 "130.149.X.X"
        protoname = 0x563f5069c520 "tcp"
        port = 0x563f50687750 "41475"
        fd = <optimized out>
        info = <optimized out>
        numfields = <optimized out>
        server = <optimized out>
        service = <optimized out>
        program = <optimized out>
        version = <optimized out>
        address = <optimized out>
        protoname = <optimized out>
        port = <optimized out>
        servername = <optimized out>
#13 gssd_scan_clnt (clp=0x563f50687c30) at gssd.c:551
        clntfd = 10
        gssd_was_closed = <optimized out>
        krb5_was_closed = <optimized out>
#14 0x0000563f504ab067 in gssd_inotify_clnt (ev=0x7ffd92dec180, 
clp=0x563f50687c30, tdi=0x563f5068a490) at gssd.c:738
No locals.
#15 gssd_inotify_cb (ifd=8, UNUSED_which=<optimized out>, 
UNUSED_data=<optimized out>) at gssd.c:800
        buf = 
"\204\000\000\000\000\001\000\000\000\000\000\000\020\000\000\000info", '\000' 
<repeats 12 times>, 
"\203\000\000\000\000\002\000\000\000\000\000\000\020\000\000\000gssd", '\000' 
<repeats 12 times>, 
"\203\000\000\000\000\002\000\000\000\000\000\000\020\000\000\000info", '\000' 
<repeats 12 times>, 
"\005\000\000\000\000\001\000@\000\000\000\000\020\000\000\000clnt1580\000\000\000\000\000\000\000\000\070\0XX.XX.149.130.in-addr.arpa\000\000\177\000\000\224\302ޒ\375\177\000\000\236\v\312\334\023\177\000\000\000\000\000\000\000\000\000\000\350\346\262\334\023\177\000\000\370\342\262\334\023\177\000\000\340"...
        ev = 0x7ffd92dec180
        len = <optimized out>
        ptr = 0x7ffd92dec180 "\204"
        rescan = <optimized out>
        tdi = 0x563f5068a490
        clp = 0x563f50687c30
#16 0x00007f13dcf269ba in event_persist_closure (ev=<optimized out>, 
base=0x563f50689410) at event.c:1580
        evcb_fd = <optimized out>
        evcb_callback = <optimized out>
        evcb_res = 2
        evcb_arg = 0x0
        evcb_callback = <optimized out>
        evcb_fd = <optimized out>
        evcb_res = <optimized out>
        evcb_arg = <optimized out>
        run_at = <optimized out>
        relative_to = <optimized out>
        delay = <optimized out>
        now = <optimized out>
        usec_mask = <optimized out>
#17 event_process_active_single_queue (base=base@entry=0x563f50689410, 
activeq=0x563f50689050, max_to_process=max_to_process@entry=2147483647, 
endtime=endtime@entry=0x0) at event.c:1639
        ev = <optimized out>
        evcb = <optimized out>
        count = 1
        __func__ = "event_process_active_single_queue"
#18 0x00007f13dcf27537 in event_process_active (base=0x563f50689410) at 
event.c:1738
        activeq = <optimized out>
        i = 0
        c = 0
        tv = {tv_sec = 94829931951488, tv_usec = 94829930051904}
        maxcb = <optimized out>
        endtime = 0x0
        limit_after_prio = 2147483647
        activeq = <optimized out>
        i = <optimized out>
        c = <optimized out>
        endtime = <optimized out>
        tv = <optimized out>
        maxcb = <optimized out>
        limit_after_prio = <optimized out>
#19 event_base_loop (base=0x563f50689410, flags=<optimized out>) at event.c:1961
        n = <optimized out>
        evsel = 0x7f13dd157dc0 <epollops>
        tv = {tv_sec = 94829930028095, tv_usec = 94829931970272}
        tv_p = <optimized out>
        res = <optimized out>
        done = 0
        retval = 0
        __func__ = "event_base_loop"
#20 0x0000563f504a8eaa in main (argc=<optimized out>, argv=0x7ffd92ded4a8) at 
gssd.c:1006
        fg = 0
        verbosity = 7
        rpc_verbosity = 7
        opt = <optimized out>
        i = <optimized out>
        progname = <optimized out>
        ccachedir = <optimized out>
        sighup_ev = {ev_evcallback = {evcb_active_next = {tqe_next = 
0x7ffd92df8268, tqe_prev = 0x7f13dd18f730}, evcb_flags = 130, evcb_pri = 0 
'\000', evcb_closure = 1 '\001', evcb_cb_union = {evcb_callback = 
0x563f504ab260 <gssd_scan_cb>, evcb_selfcb = 0x563f504ab260 <gssd_scan_cb>, 
evcb_evfinalize = 0x563f504ab260 <gssd_scan_cb>, evcb_cbfinalize = 
0x563f504ab260 <gssd_scan_cb>}, evcb_arg = 0x0}, ev_timeout_pos = 
{ev_next_with_common_timeout = {tqe_next = 0xffffffff, tqe_prev = 0x0}, 
min_heap_idx = -1}, ev_fd = 1, ev_base = 0x563f50689410, ev_ = {ev_io = 
{ev_io_next = {le_next = 0x0, le_prev = 0x563f50688f50}, ev_timeout = {tv_sec = 
140727067475968, tv_usec = 0}}, ev_signal = {ev_signal_next = {le_next = 0x0, 
le_prev = 0x563f50688f50}, ev_ncalls = 0, ev_pncalls = 0x0}}, ev_events = 24, 
ev_res = 0, ev_timeout = {tv_sec = 0, tv_usec = 94829930023957}}

Thread 1 (Thread 0x7f13dcb2d700 (LWP 4596)):
#0  0x0000563f504ab38e in create_auth_rpc_client (clp=clp@entry=0x563f50687c30, 
tgtname=tgtname@entry=0x563f5069e67f "h...@client.domain.tu-berlin.de", 
clnt_return=clnt_return@entry=0x7f13dcb2cde8, 
auth_return=auth_return@entry=0x7f13dcb2cd50, uid=uid@entry=0, 
cred=cred@entry=0x0, authtype=0) at gssd_proc.c:352
        rpc_clnt = 0x0
        sec = {mech = 0x563f504b7590 <krb5oid>, qop = 0, svc = 
RPCSEC_GSS_SVC_NONE, cred = 0x7f13d80024d0, req_flags = 2}
        auth = 0x0
        retval = -1
        min_stat = 256
        rpc_errmsg = '\000' <repeats 13 times>, 
"\001\000\000`\314û6إ{k\006\333m\376\225C\362L\252\206\062\312\065\377\236\272a\271M\212{\245=iٞ\230\243\066\226\200\377s\345\334\023\177\000\000d\366\202y\275b\311\365\370N\306cR\341\352Zj=\244@e19m\330\320\342\035\225\266\362^oBQ\246f\n\230\065\255a%\177)\364\064\371\230\356\217\375|\327֢\377s\345\334\023\177\000\000P\263\337nI;\v\237\313\222n4'Ǧ\324\330'aA\225\207\017\210T\222\065\202\005̜\304\023l\326\024D\034\324\063\366\032(\341\231\335\030B|\243\357\334i\000\215\327\362x\201\177C\031\375\242\017\t\201\036_\300$\000\330\023\177\000\000"...
        protocol = 6
        timeout = {tv_sec = -705504076444949378, tv_usec = 6203012124671966628}
        addr = 0x563f50687d88
        salen = <optimized out>
#1  0x0000563f504ab9f8 in krb5_use_machine_creds (clp=clp@entry=0x563f50687c30, 
uid=uid@entry=0, tgtname=tgtname@entry=0x563f5069e67f 
"h...@client.domain.tu-berlin.de", service=service@entry=0x563f5069e6a3 "nfs", 
rpc_clnt=rpc_clnt@entry=0x7f13dcb2cde8) at gssd_proc.c:558
        min_stat = 0
        auth = 0x0
        credlist = 0x7f13d8004a00
        ccname = 0x7f13d8004a00
        nocache = <optimized out>
        success = 0
#2  0x0000563f504abb92 in process_krb5_upcall (clp=clp@entry=0x563f50687c30, 
uid=uid@entry=0, fd=10, tgtname=tgtname@entry=0x563f5069e67f 
"h...@client.domain.tu-berlin.de", service=service@entry=0x563f5069e6a3 "nfs") 
at gssd_proc.c:646
        rpc_clnt = 0x0
        auth = <optimized out>
        pd = {pd_ctx = 0x0, pd_ctx_hndl = {length = 0, value = 0x0}, pd_seq_win 
= 0}
        token = {length = 0, value = 0x0}
        err = 1349117544
        downcall_err = -13
        maj_stat = <optimized out>
        min_stat = 1349108960
        lifetime_rec = 22079
        gacceptor = 0x0
        mech = 0x7f13d8000020
        acceptor = {length = 0, value = 0x0}
#3  0x0000563f504ac3b3 in handle_gssd_upcall (info=0x563f5069e660) at 
gssd_proc.c:805
        clp = 0x563f50687c30
        uid = 0
        p = 0x563f5069e677 ""
        mech = <optimized out>
        uidstr = <optimized out>
        target = 0x563f5069e67f "h...@client.domain.tu-berlin.de"
        service = 0x563f5069e6a3 "nfs"
        enctypes = 0x563f5069e6b0 "18,17,16,23,3,1,2"
        upcall_str = 0x7f13d8025f50 "mech=krb5 uid=0 
target=h...@client.domain.tu-berlin.de service=nfs enctypes=18,17,16,23,3,1,2 "
        pbuf = 0x0
        __func__ = "handle_gssd_upcall"
#4  0x00007f13dcd4dfa3 in start_thread (arg=<optimized out>) at 
pthread_create.c:486
        ret = <optimized out>
        pd = <optimized out>
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139723283814144, 
-6716850532091874603, 140727067529374, 140727067529375, 139723283814144, 
94829932045632, 6696656257836987093, 6696656584800940757}, mask_was_saved = 
0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, 
canceltype = 0}}}
        not_first_call = <optimized out>
#5  0x00007f13dcc7e4cf in clone () at 
../sysdeps/unix/sysv/linux/x86_64/clone.S:95
No locals.
(gdb) quit

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