samba - Nov 2021 - PANIC: Signal 11: Segmentation fault in 4.15.2-Debian

On Tue, 2021-11-23 at 19:01 +0000, spindles seven via samba
wrote:
> Having upgraded a member server to version 4.15.2, I am now getting
> these errors in syslog:
> The platform is Debian Bullseye and I am using Louis' repo.  Other
> member servers running the same version are, at the moment, not
> seeing these failures.   Is this a know bug, or shall I create one?
Can you get a full GDB backtrace with the gdb_backtrace script?

panic action = /path/to/gdb_backtrace %d

At one point these were automatically enabled in debian actually.

Andrew Bartlett

-- 
Andrew Bartlett (he/him)       https://samba.org/~abartlet/
Samba Team Member (since 2001) https://samba.org
Samba Team Lead, Catalyst IT   https://catalyst.net.nz/services/samba

Samba Development and Support, Catalyst IT - Expert Open Source
Solutions

On 23 November 2021 20:19 Andrew Bartlett wrote: 
> Can you get a full GDB backtrace with the gdb_backtrace script?
> 
> panic action = /path/to/gdb_backtrace %d
> 
> At one point these were automatically enabled in debian actually.
> 
Many thanks Andrew.   I would if I could!    I have no idea at all how to do
that.   I see that the gdb_backtrace script is included for self-compiled
versions, but I can't see it on the system with Louis' compiled version.
I assume I would need to install gdb and use the script (copied from the sources
of 4-15.2)?   How is the script invoked?      Problem is I don't know how to
trigger the Panic action - it happened this morning when I was out, but there
may well have been some backups running accessing the shares on the server.

If you can give me some guidance I'll try to do what I can to capture the
event.

Thanks,

Roy