[Samba] check_account: Failed to find local account with UID" issue / The university of Chicago

[Rowland Penny]

On 28/07/2023 22:01, Andrew Bartlett via samba wrote:
> On Fri, 2023-07-28 at 19:55 +0000, Himanshi Yadav via samba wrote:
>> Jul 28 09:18:51 midway3-dm1.rcc.local winbindd[1056745]:    #15 /lib64/libtevent.so.0(tevent_common_loop_immediate+0x27) [0x7fbf521f6ca7]
>> Jul 28 09:18:51 midway3-dm1.rcc.local winbindd[1056745]:    #16 /lib64/libtevent.so.0(+0xed2f) [0x7fbf521fcd2f]
>> Jul 28 09:18:51 midway3-dm1.rcc.local winbindd[1056745]:    #17 /lib64/libtevent.so.0(+0xcf5b) [0x7fbf521faf5b]
>> Jul 28 09:18:51 midway3-dm1.rcc.local winbindd[1056745]:    #18 /lib64/libtevent.so.0(_tevent_loop_once+0x95) [0x7fbf521f59b5]
>> Jul 28 09:18:51 midway3-dm1.rcc.local winbindd[1056745]:    #19 /usr/sbin/winbindd(main+0xd34) [0x56316272a2f4]
>> Jul 28 09:18:51 midway3-dm1.rcc.local winbindd[1056745]:    #20 /lib64/libc.so.6(__libc_start_main+0xe5) [0x7fbf51865d85]
>> Jul 28 09:18:51 midway3-dm1.rcc.local winbindd[1056745]:    #21 /usr/sbin/winbindd(_start+0x2e) [0x56316272ae8e]
>> Jul 28 09:18:51 midway3-dm1.rcc.local winbindd[1056745]: [2023/07/28 09:18:51.432424,  0] ../../source3/lib/dumpcore.c:318(dump_core)
>> Jul 28 09:18:51 midway3-dm1.rcc.local winbindd[1056745]:   coredump is handled by helper binary specified at /proc/sys/kernel/core_pattern
>> Jul 28 09:18:51 midway3-dm1.rcc.local winbindd[1056745]:
> 
> It is a Saturday here and I've not digested the entire thread, but this
> is the end of a backtrace and if Samba is crashing it is no supprise if
> things are not working.
> 
> Please supply that full backtrace and debug that first.
> 
> Andrew,
> 

That was the first mention of a crash, but it seems that the OP has been 
trying various idmap backends (and probably other things), so whilst 
Samba shouldn't crash, who knows if it isn't self inflicted. Yes, the 
crash should be investigated first.

What isn't helping is the sanitisation
We have been given DOMAIN/WORKGROUP 'AD'
The connecting user appears to be from the 'ADLOCAL' DOMAIN/WORKGROUP
The REALM is 'AD.UCHICAGO.EDU' but the log fragments show what appears 
to be the machines FQDN 'midway3-dm1.rcc.local'

Nothing matches.

Rowland