Troubleshooting RPC client when it SEGV's on 0x8 addr - debugging

Question

Need some options for troubleshooting this situation. Below is some of what I've done and I cannot determine how I get a SIGSEGV on a 0x8 address. No references have that address. Since this is generated by rpcgen and appears to be correct I'm at a loss one where to look next. (RHEL 7.2, x86, gcc 4.8.5)
Thanks for any options.
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Reading symbols from /home/tdavis/deepspace/RL/rl/rl/dsvwrite...done.
[New LWP 19338]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
Core was generated by `dsvwrite if=/root/anaconda-ks.cfg
fid=anaconda-ks.cfg'.
Program terminated with signal 11, Segmentation fault.
#0 0x000000000048fb0d in lt_open_1 (argp=0x7ffdafed6f40, clnt=0x0) at ds_clnt.c:93
93 memset((char *)&clnt_res, 0, sizeof(clnt_res));
(gdb) bt
#0 0x000000000048fb0d in lt_open_1 (argp=0x7ffdafed6f40, clnt=0x0) at ds_clnt.c:93
#1 0x00000000004552e2 in ltr_open (lt=0xd003a0, lbl=0x7ffdafed71d0, mode=2, p_start=0) at ds_lib.c:373
#2 0x0000000000441501 in lt_open (lt=0xd003a0, lbl=0x7ffdafed71d0, mode=2, p_start=0) at lt.c:383
#3 0x000000000042fa9d in vs_xopen (vsd=0, oflg=2, fs=0x7ffdafed7460) at rx.c:870
#4 0x000000000042ce55 in vs_open (vsd=0, oflg=2, fs=0x7ffdafed76f0) at rx.c:349
#5 0x000000000040b30c in rlvwrite (argc=3, argv=0x7ffdafed7a38) at xcom.c:685
#6 0x00000000004983c5 in main_mux (argc=3, argv=0x7ffdafed7a38) at main_man.c:87
#7 0x0000000000404881 in main (argc=3, argv=0x7ffdafed7a38) at rcom.c:376
(gdb) l
88 open_res *
89 lt_open_1(open_prm *argp, CLIENT *clnt)
90 {
91 static open_res clnt_res;
92
93 memset((char *)&clnt_res, 0, sizeof(clnt_res));
94 if (clnt_call (clnt, LT_OPEN,
95 (xdrproc_t) xdr_open_prm, (caddr_t) argp,
96 (xdrproc_t) xdr_open_res, (caddr_t) &clnt_res,
97 TIMEOUT) != RPC_SUCCESS) {
(gdb)98 return (NULL);
99 }
100 return (&clnt_res);
101 }
102
103 close_res *
104 lt_close_1(close_prm *argp, CLIENT *clnt)
105 { 106 static close_res clnt_res;
107
(gdb) p clnt_res
$1 = {lbl = {tran = 0, pad = 0, len = 0, format = 0, vol = 0x0, uvol = 0x0, file = 0x0,Êfile = 0x0, unl = 0x0}, status = 0, terrn = 0, uerrno = 0, rl_system = 0,Êl_assert = 0}
(gdb) p $_siginfo
$2 = {si_signo = 11, si_errno = 0, si_code = 1, _sifields = {_pad = {8,Ê <repeats 27 times>}, _kill = {si_pid = 8, si_uid = 0}, _imer = {si_tid = 8,Êi_overrun = 0, si_sigval = {sival_int = 0, sival_ptr = 0x0}}, _rt = {si_pid = 8,Êi_uid = 0, si_sigval = {sival_i = 0, sival_ptr = 0x0}}, _sigchld = { si_pid = 8, si_uid = 0, si_status = 0, si_utime = 0, si_stime = 0}, **sigfault = { si_addr = 0x8}**, _sigpoll = {si_band = 8, si_fd = 0}}}
(gdb) quit