[Samba] Repeat core dumps due to libgcrypt?

[Ochressandro Rettinger]

 	Hi, sorry.  I have spent about 4 hours googling, and had no luck. 
I'm getting repeat core dumps out of smbd, and nothing I've gotten from 
the log file has successfully pointed me at any indication that anyone 
else has posted about this problem before.

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libgcrypt selftest: binary  (0): Selftest failed 
(/lib64/.libgcrypt.so.11.hmac)
fatal error in libgcrypt, file visibility.c, line 1250, function 
gcry_create_nonce: called in non-operational state
[2016/04/04 14:39:20.089157,  0] ../lib/util/fault.c:72(fault_report)
   ===============================================================
[2016/04/04 14:39:20.089302,  0] ../lib/util/fault.c:73(fault_report)
   INTERNAL ERROR: Signal 6 in pid 3692 (4.0.0rc4)
   Please read the Trouble-Shooting section of the Samba HOWTO
[2016/04/04 14:39:20.089465,  0] ../lib/util/fault.c:75(fault_report)
   ===============================================================
[2016/04/04 14:39:20.089580,  0] ../source3/lib/util.c:810(smb_panic_s3)
   PANIC (pid 3692): internal error
[2016/04/04 14:39:20.090361,  0] 
../source3/lib/util.c:921(log_stack_trace)
   BACKTRACE: 29 stack frames:
    #0 /usr/lib64/libsmbconf.so.0(log_stack_trace+0x1a) [0x7f3cc61f4f8a]
    #1 /usr/lib64/libsmbconf.so.0(smb_panic_s3+0x25) [0x7f3cc61f5055]
    #2 /usr/lib64/libsamba-util.so.0(smb_panic+0x1a1) [0x3950017801]
    #3 /usr/lib64/libsamba-util.so.0() [0x39500178c2]
    #4 /lib64/libpthread.so.0() [0x3999a0f7e0]
    #5 /lib64/libc.so.6(gsignal+0x35) [0x3999632625]
    #6 /lib64/libc.so.6(abort+0x175) [0x3999633e05]
    #7 /lib64/libgcrypt.so.11(+0x399e60e398) [0x7f3cc1332398]
    #8 /lib64/libgcrypt.so.11(gcry_create_nonce+0x46) [0x7f3cc132b0f6]
    #9 /usr/lib64/libgnutls.so.26(+0x39a1e3e887) [0x7f3cc1a89887]
    #10 /usr/lib64/libgnutls.so.26(+0x39a1e3cb1c) [0x7f3cc1a87b1c]
    #11 /usr/lib64/libgnutls.so.26(gnutls_global_init+0x126) 
[0x7f3cc1a78456]
    #12 /usr/lib64/libcups.so.2(httpInitialize+0x41) [0x39a1222a21]
    #13 /usr/lib64/libcups.so.2(_httpCreate+0x95) [0x39a1222ae5]
    #14 /usr/lib64/libcups.so.2(httpConnectEncrypt+0x1a) [0x39a1222c1a]
    #15 /usr/lib64/samba/libsmbd_base.so(+0xa82d8) [0x7f3cc69202d8]
    #16 /usr/lib64/samba/libsmbd_base.so(cups_cache_reload+0x205) 
[0x7f3cc6922f55]
    #17 /usr/lib64/samba/libsmbd_base.so(pcap_cache_reload+0x146) 
[0x7f3cc691fd46]
    #18 /usr/lib64/samba/libsmbd_base.so(+0x93169) [0x7f3cc690b169]
    #19 /usr/lib64/libsmbconf.so.0(+0x3b107) [0x7f3cc620b107]
    #20 /usr/lib64/libsmbconf.so.0(run_events_poll+0x115) [0x7f3cc620b7d5]
    #21 /usr/lib64/libsmbconf.so.0(+0x3bef0) [0x7f3cc620bef0]
    #22 /usr/lib64/libtevent.so.0(_tevent_loop_once+0x9d) [0x39a320349d]
    #23 /usr/lib64/libtevent.so.0(tevent_common_loop_wait+0x1b) 
[0x39a320351b]
    #24 /usr/lib64/samba/libsmbd_base.so(start_background_queue+0x271) 
[0x7f3cc690b4b1]
    #25 /usr/lib64/samba/libsmbd_base.so(printing_subsystem_init+0xa3) 
[0x7f3cc690b7a3]
    #26 smbd(main+0x1175) [0x409b05]
    #27 /lib64/libc.so.6(__libc_start_main+0xfd) [0x399961ed5d]
    #28 smbd() [0x405459]
[2016/04/04 14:39:20.092147,  0] ../source3/lib/dumpcore.c:317(dump_core)
   dumping core in /var/log/samba/cores/smbd
[2016/04/04 14:39:20.199910,  0] 
../source3/printing/print_cups.c:516(cups_async_callback)
   failed to recv pcap blob

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 	Sorry, I'd have tried to trim that, but I don't know which parts 
are important for y'all to see.

 	The other weird thing is, these core dumps are patterned.  After I 
start smbd, I get one immediately, and then I get one ~60 seconds later, 
and then I get another one approximately every ~781 seconds.

 	-Sandro