samba - Feb 2023 - Crash on "samba-tool domain functionalprep --function-level=2012_R2 ..."

Il 02/02/2023 14:50, Rowland Penny via samba ha scritto:
> Your English isn't bad, which is more than what I can say about your 
> email client ?
>
> Can you please try again, with a different client that doesn't try to 
> put everything on one line.
>
> Rowland 
Thanks for reply, the client is thunderbird and I setted text-only 
format to avoid some issue saw in past with mailing list but don't seems 
produced good result in this case (or is antivirus that I try to temp. 
disable now), I'll retry without this mode and using paste.debian.net 
for bigger commands output, see below...


Hi, I tried to add windows 2019 domain controller to samba active 
directory following this procedure: 
https://dev.to/aciklab/adding-a-windows-2019-dc-to-your-samba-domain-im2

When I this command I had a crash:

samba-tool domain functionalprep --function-level=2012_R2 --forest-prep 
--domain-prep

I also tried to update to latest samba version (4.17.5) from backports 
packages (exactly version 2:4.17.5+dfsg-1~bpo11+1) on debian 11 but 
crashed anyway.

Redoing another time the command don't crash and don't print errors but 
I don't know really did all correct and complete changes with crash 
occurred before.

I restored the backup installed also needed dbgsym packages before 
reproduce the crash to decode the backtrace symbols.
> vi /etc/apt/sources.list
> deb http://deb.debian.org/debian-debug/ bullseye-debug main contrib 
> non-free
> deb http://deb.debian.org/debian-debug/ bullseye-backports-debug main 
> contrib non-free
>
> apt -t bullseye-backports-debug install samba-libs-dbgsym 
> libtevent0-dbgsym samba-dsdb-modules-dbgsym libldb2-dbgsym 
> python3-ldb-dbgsym
> apt install libc6-dbg python3-dbg
Before start I also checked db
> samba-tool dbcheck --cross-ncs --fix --yes? --reset-well-known-acls
> Checking 3630 objects
> Checked 3630 objects (0 errors)
And even if dbgsym packages was installed it didn't decode the symbols 
in the backtrace: https://paste.debian.net/hidden/1f4f1de4/

I don't know how to decode symbols of this printed backtrace, if are 
needed to solve the issue can you tell me what I should do please?

Another thing spotted on previous command that even if don't seems 
failed there are some "Unable to find attribute", are them normal or 
minor "not blocking" issues or there is something that should be
solved
before?

"samba-tool domain schemaupgrade" output: 
https://paste.debian.net/hidden/7d2de9ee/

Thanks for any reply and sorry for my bad english

On 3/02/23 03:15, Fabio Fantoni via samba wrote:
> When I this command I had a crash:
> 
> samba-tool domain functionalprep --function-level=2012_R2 --forest-prep 
> --domain-prep
If you try with `samba-tool -d9` you'll get more output, which may or 
may not help. And if you add

    panic action = /path/to/samba/gdb_backtrace %d

to smb.conf, you ought to see more profuse back traces (what the exact 
path or package is, I don't know).

I think the 'ndr_pull_relative_ptr1' lines are unrelated, just Samba 
trying to parse SD strings as binary before trying it the other way 
(c.f. https://lists.samba.org/archive/samba/2021-July/236839.html).

What version of libgnutls to you have? libgenrand-samba4.so.0 should 
always lead to gnutls, as fas as I am aware.

Douglas