samba - Sep 2021 - pdbedit dump core

Hello,

My problem:

	>> > > Environment: Ubuntu 20.04 up to date
	>> > > Linux users: 3500 logins
	>> > > 
	>> > > For 1 user, says cpier:
	>> > > # samba-tool user show cpier : seems OK
	>> > > # pdbedit -L -w | grep cpier: seems OK
	>> > > # smbpasswd cpier : works
	>> > > # samba-tool dbcheck : is OK
	>> > > # pdbedit -i smbpasswd:FILE : worked for 2306 entries on
3500,
	>> > >   and failed.
	>> > >   
	>> > > One experiment:
	>> > > # cat s
	>> > > cpier:34164:XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX:31D6CFE0D16...
	>> > > # pdbedit -i smbpasswd:s
	>> > > Segmentation fault (core dumped)

My context: Samba as an Active Directory Domain Controller
With a small set of users, everything worked: login on PC/Windows 10,
policies.
Problem appears with 3500 users.
>> Running pdbedit under gdb with gdb --args pdbedit ...
Poor result:
	# gdb --args pdbedit -i smbpasswd:s
	...
	Reading symbols from pdbedit...
	(No debugging symbols found in pdbedit)
	...
	(gdb) run
	...
	Program received signal SIGSEGV, Segmentation fault.
	0x00007ffff7f56e34 in ?? () from /lib/x86_64-linux-gnu/libsamba-passdb.so.0
	(gdb) bt
	#0  0x00007ffff7f56e34 in ?? () from /lib/x86_64-linux-gnu/libsamba-passdb.so.0
	#1  0x000055555555a206 in main ()

Best,

--
Jacques Beigbeder                    |   Jacques.Beigbeder at ens.fr
Service de Prestations Informatiques |      http://www.spi.ens.fr
Ecole normale sup?rieure             | Tel : (+33 1)1 44 32 37 96
45 rue d'Ulm                         |
F75230 Paris cedex 05                |

On Wed, 2021-09-22 at 14:47 +0200, Jacques Beigbeder via samba
wrote:
> Hello,
> 
> My problem:
> 
> 	>> > > Environment: Ubuntu 20.04 up to date
> 	>> > > Linux users: 3500 logins
> 	>> > > 
> 	>> > > For 1 user, says cpier:
> 	>> > > # samba-tool user show cpier : seems OK
> 	>> > > # pdbedit -L -w | grep cpier: seems OK
> 	>> > > # smbpasswd cpier : works
> 	>> > > # samba-tool dbcheck : is OK
> 	>> > > # pdbedit -i smbpasswd:FILE : worked for 2306 entries
on
> 3500,
> 	>> > >   and failed.
> 	>> > >   
> 	>> > > One experiment:
> 	>> > > # cat s
> 	>> > >
> cpier:34164:XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX:31D6CFE0D16...
> 	>> > > # pdbedit -i smbpasswd:s
> 	>> > > Segmentation fault (core dumped)
> 
> My context: Samba as an Active Directory Domain Controller
> With a small set of users, everything worked: login on PC/Windows 10,
> policies.
> Problem appears with 3500 users.
> 
> > > Running pdbedit under gdb with gdb --args pdbedit ...
Why are you running pdbedit ? What do you want to achieve ?

Rowland