[Samba] Samba 4.15 AD installation crashed and burned

[Patrick Goetz]

Context: I'm installing Samba 4.15 using the http://apt.van-belle.nl/ 
PPA on Ubuntu 20.04. One detail I hope is irrelevant is that Ubuntu is 
running in an LXD 4.19 container.  The container is connected to a 
system bridge and for all intents and purposes looks like a bare metal 
installation attached directly to my network

Command:

  # samba-tool domain provision --use-rfc2307 --interactive

All responses were default save for forwarding DNS, for which I gave the 
IP address of my own DNS server. Then this happened -- any thoughts? I'm 
guessing there's some resource limit which needs to be increased.  Also 
why is it repacking anything? This is a clean install on a pristine copy 
of Ubuntu 20.04 container image.  The only additional packages I 
installed save those needed for Samba are openssh-server and gpg.

...
Repacking database from v1 to v2 format (first record 
CN=6bcd5678-8314-11d6-977b-00c04f613221,CN=Operations,CN=DomainUpdates,CN=System,DC=ea,DC=linuxcs,DC=com)
Security context active token stack underflow!
===============================================================
INTERNAL ERROR: Security context active token stack underflow! in pid 
6324 (4.15.0-Debian)
If you are running a recent Samba version, and if you think this problem 
is not yet fixed in the latest versions, please consider reporting this 
bug, see https://wiki.samba.org/index.php/Bug_Reporting
===============================================================
PANIC (pid 6324): Security context active token stack underflow! in 
4.15.0-Debian
BACKTRACE: 58 stack frames:
  #0 /lib/x86_64-linux-gnu/libsamba-util.so.0(log_stack_trace+0x34) 
[0x7f91abd6c9c4]
  #1 /lib/x86_64-linux-gnu/libsamba-util.so.0(smb_panic+0xd) 
[0x7f91abd6cc1d]
  #2 
/usr/lib/x86_64-linux-gnu/samba/libsmbd-base.so.0(sec_ctx_active_token+0x78) 
[0x7f91a7697178]
  #3 /usr/lib/x86_64-linux-gnu/samba/libsmbd-base.so.0(try_chown+0xb1) 
[0x7f91a76a3921]
  #4 /usr/lib/x86_64-linux-gnu/samba/libsmbd-base.so.0(set_nt_acl+0x1b1) 
[0x7f91a76a3ba1]
  #5 /usr/lib/x86_64-linux-gnu/samba/libsmbd-base.so.0(+0x91ac1) 
[0x7f91a75ddac1]
  #6 /usr/lib/x86_64-linux-gnu/samba/libsmbd-base.so.0(+0x231111) 
[0x7f91a777d111]
  #7 
/usr/lib/x86_64-linux-gnu/samba/libsmbd-base.so.0(fset_nt_acl_common+0x2b7) 
[0x7f91a777f367]
  #8 /usr/lib/x86_64-linux-gnu/samba/vfs/acl_xattr.so(+0x14fc) 
[0x7f91a46be4fc]
  #9 
/usr/lib/python3/dist-packages/samba/samba3/smbd.cpython-38-x86_64-linux-gnu.so(+0x477a) 
[0x7f91a78b277a]
  #10 /usr/bin/python3(PyCFunction_Call+0x59) [0x5f5db9]
  #11 /usr/bin/python3(_PyObject_MakeTpCall+0x29e) [0x5f698e]
  #12 /usr/bin/python3(_PyEval_EvalFrameDefault+0x629c) [0x57195c]
  #13 /usr/bin/python3(_PyEval_EvalCodeWithName+0x26a) [0x56a0ba]
  #14 /usr/bin/python3(_PyFunction_Vectorcall+0x393) [0x5f6343]
  #15 /usr/bin/python3(_PyEval_EvalFrameDefault+0x186a) [0x56cf2a]
  #16 /usr/bin/python3(_PyEval_EvalCodeWithName+0x26a) [0x56a0ba]
  #17 /usr/bin/python3(_PyFunction_Vectorcall+0x393) [0x5f6343]
  #18 /usr/bin/python3(_PyEval_EvalFrameDefault+0x71d) [0x56bddd]
  #19 /usr/bin/python3(_PyEval_EvalCodeWithName+0x26a) [0x56a0ba]
  #20 /usr/bin/python3(_PyFunction_Vectorcall+0x393) [0x5f6343]
  #21 /usr/bin/python3(_PyEval_EvalFrameDefault+0x71d) [0x56bddd]
  #22 /usr/bin/python3(_PyEval_EvalCodeWithName+0x26a) [0x56a0ba]
  #23 /usr/bin/python3(_PyFunction_Vectorcall+0x393) [0x5f6343]
  #24 /usr/bin/python3(_PyEval_EvalFrameDefault+0x186a) [0x56cf2a]
  #25 /usr/bin/python3(_PyEval_EvalCodeWithName+0x26a) [0x56a0ba]
  #26 /usr/bin/python3(_PyFunction_Vectorcall+0x393) [0x5f6343]
  #27 /usr/bin/python3(_PyEval_EvalFrameDefault+0x186a) [0x56cf2a]
  #28 /usr/bin/python3(_PyEval_EvalCodeWithName+0x26a) [0x56a0ba]
  #29 /usr/bin/python3(_PyFunction_Vectorcall+0x393) [0x5f6343]
  #30 /usr/bin/python3() [0x50b291]
  #31 /usr/bin/python3(PyObject_Call+0x1f7) [0x5f56c7]
  #32 /usr/bin/python3(_PyEval_EvalFrameDefault+0x1f36) [0x56d5f6]
  #33 /usr/bin/python3(_PyEval_EvalCodeWithName+0x26a) [0x56a0ba]
  #34 /usr/bin/python3(_PyFunction_Vectorcall+0x393) [0x5f6343]
  #35 /usr/bin/python3() [0x50ad7c]
  #36 /usr/bin/python3(PyObject_Call+0x1f7) [0x5f56c7]
  #37 /usr/bin/python3(_PyEval_EvalFrameDefault+0x1f36) [0x56d5f6]
  #38 /usr/bin/python3(_PyEval_EvalCodeWithName+0x26a) [0x56a0ba]
  #39 /usr/bin/python3(_PyFunction_Vectorcall+0x393) [0x5f6343]
  #40 /usr/bin/python3() [0x50ad7c]
  #41 /usr/bin/python3(PyObject_Call+0x1f7) [0x5f56c7]
  #42 /usr/bin/python3(_PyEval_EvalFrameDefault+0x1f36) [0x56d5f6]
  #43 /usr/bin/python3(_PyEval_EvalCodeWithName+0x26a) [0x56a0ba]
  #44 /usr/bin/python3(_PyFunction_Vectorcall+0x393) [0x5f6343]
  #45 /usr/bin/python3() [0x50b291]
  #46 /usr/bin/python3(PyObject_Call+0x1f7) [0x5f56c7]
  #47 /usr/bin/python3(_PyEval_EvalFrameDefault+0x1f36) [0x56d5f6]
  #48 /usr/bin/python3(_PyEval_EvalCodeWithName+0x26a) [0x56a0ba]
  #49 /usr/bin/python3(PyEval_EvalCode+0x27) [0x68d5b7]
  #50 /usr/bin/python3() [0x67cd01]
  #51 /usr/bin/python3() [0x67cd7f]
  #52 /usr/bin/python3() [0x67ce21]
  #53 /usr/bin/python3(PyRun_SimpleFileExFlags+0x197) [0x67ef47]
  #54 /usr/bin/python3(Py_RunMain+0x212) [0x6b7242]
  #55 /usr/bin/python3(Py_BytesMain+0x2d) [0x6b75cd]
  #56 /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf3) 
[0x7f91acd5c0b3]
  #57 /usr/bin/python3(_start+0x2e) [0x5fb18e]
Can not dump core: corepath not set up