samba - Jan 2019 - Samba 4.2.3 sudden crash problem

Hi,
I run Samba 4.2.3 on a fileserver since 2015 without any problem even if 
in the log file I read "NTLMSSP NTLM2 packet check failed due to invalid 
signature" several times a day.
In my network are presents windows 7, 10, and some old XP machine.

Yesterday evening, for the very first time, my server chrashes and I 
have to restart it. The samba error reported is:

internal error: signal 11 in PID 1280 (4.2.3) - Please read the 
trouble-shooting section of the samba how to.

I have changed nothing in the configuration files ....

What can it happened?

Thanks in advance

Daniele

On Tue, 8 Jan 2019 12:31:49 +0100
Daniele Manfredi via samba <samba at lists.samba.org> wrote:
> Hi,
> I run Samba 4.2.3 on a fileserver since 2015 without any problem even
> if in the log file I read "NTLMSSP NTLM2 packet check failed due to
> invalid signature" several times a day.
> In my network are presents windows 7, 10, and some old XP machine.
> 
> Yesterday evening, for the very first time, my server chrashes and I 
> have to restart it. The samba error reported is:
> 
> internal error: signal 11 in PID 1280 (4.2.3) - Please read the 
> trouble-shooting section of the samba how to.
> 
> I have changed nothing in the configuration files ....
> 
> What can it happened?
> 
> Thanks in advance
> 
> Daniele
> 
This probably came from a windows 10 connection, but without further
info, it is hard to be sure.

Samba 4.2.x is EOL as far as Samba is concerned, so it might an idea to
upgrade.

Can you post your smb.conf for a start.

Rowland