[Samba] winbind pam trouble

[lists]

On 12-4-2016 10:24, lists wrote:

 From log.wb-DOMAIN:
>
> [2016/04/11 20:39:01.330173,  0] ../lib/util/fault.c:79(fault_report)
>   INTERNAL ERROR: Signal 11 in pid 4899 (4.2.9-SerNet-Debian-8.wheezy)
>   Please read the Trouble-Shooting section of the Samba HOWTO
> [2016/04/11 20:39:01.330199,  0] ../lib/util/fault.c:81(fault_report)
>   ===============================================================
> [2016/04/11 20:39:01.330217,  0] ../source3/lib/util.c:788(smb_panic_s3)
>   PANIC (pid 4899): internal error
> [2016/04/11 20:39:01.330733,  0]
> ../source3/lib/util.c:899(log_stack_trace)
>   BACKTRACE: 29 stack frames:

I am trying to trigger the above panic:

wbinfo -u (lists all users)
wbinfo -g (lists all groups)
wbinfo -t (checking trust succeeds)
wbinfo --list-status (all three reported online)
wbinfo --authenticate=user%password (authentication succeeds)
wbinfo --dc-info=DOMAIN (lists only ONE of our three DCs, but no panic)

The above panic happened yesterday while nsswitch.conf contained
 > passwd:         compat winbind
 > group:          compat winbind
 > shadow:         compat winbind

Currently nsswitch.conf has
 > passwd: compat sss
 > group: compat sss
 > shadow: compat sss
and winbind is running without crashes.

Since this is production, I'd rather not put back winbind in 
nsswitch.conf, because the winbind panic will break fileserving from 
this member server.

Any ideas how to approach this..?

BTW: wheezy 7.10, x64, sernet-samba 4.2.9-8.

MJ