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Description of problem:
dfsgetinfo reports WERR_NERR_DFSNOSUCHSERVER in Permissive mode and
NT_STATUS_CONNECTION_DISCONNECTED in Enforcing mode. 
http://pastebin.test.redhat.com/1051880
http://file.emea.redhat.com/~dkarpele/log_dfsgetinfo/

Version-Release number of selected component (if applicable):


How reproducible:


Steps to Reproduce:
The order of the commands is:
0) created dir on Windows (win-share-coredump-with)
1) Join the Ad domain and start smb & winbind
2) ln -s msdfs:AD-SAMBA-R87\win-share-coredump-with pointA
3) smbclient //localhost/samba-share/pointA -U Administrator%Secret123 -c showconnect'
//AD-SAMBA-R87/win-share-coredump-with

4) rpcclient localhost -U% -c 'dfsgetinfo \\localhost\samba-share\pointA localhost pointA''do_cmd: Could not initialise netdfs. Error was NT_STATUS_CONNECTION_DISCONNECTED

5) setenforce 0
6) rpcclient localhost -U% -c 'dfsgetinfo \\localhost\samba-share\pointA localhost pointA''
result was WERR_NERR_DFSNOSUCHSERVER

Actual results:
result was WERR_NERR_DFSNOSUCHSERVER

Expected results:


Additional info:

https://idm-artifacts.psi.redhat.com/idm-ci/samba/Test-compose/RHEL9.3/2023-05-23_16-14/tier-2/tier2_ws2019/1/tier2-restraint.01/recipes/1/tasks/32/logs/taskout.log 
Originally found on samba-4.16, now I reproduce it on samba-4.18. Test works fine with samba-4.17

The reason is in a new samba code in samba-4.18. rpcclient dfsgetinfo no longer supports double backslash in path:


rpcclient localhost -U% -c 'dfsgetinfo \\localhost\samba-share\pointA localhost pointA''

and works only with a single backslash.

rpcclient localhost -U% -c 'dfsgetinfo \localhost\samba-share\pointA localhost pointA''

Mail to upstream was sent to samba-technical list to clarify the change.

The fix is part of samba-4.18.6 which will be released in the middle of August. Rhel 8.9/9.3 will be then rebased to it.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (Moderate: samba security, bug fix, and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2023:6667