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Bug 2232564 - [RHEL8] samba 4.18 regression. WERR_NERR_DFSNOSUCHSERVER with dfsgetinfo
Summary: [RHEL8] samba 4.18 regression. WERR_NERR_DFSNOSUCHSERVER with dfsgetinfo
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 8
Classification: Red Hat
Component: samba
Version: 8.9
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: rc
: ---
Assignee: Andreas Schneider
QA Contact: sssd-qe
URL:
Whiteboard: sync-to-jira
Depends On: 2211617
Blocks:
TreeView+ depends on / blocked
 
Reported: 2023-08-17 11:47 UTC by Andreas Schneider
Modified: 2023-11-14 18:11 UTC (History)
4 users (show)

Fixed In Version: samba-4.18.6-1.el8
Doc Type: If docs needed, set a value
Doc Text:
Clone Of: 2211617
Environment:
Last Closed: 2023-11-14 15:50:31 UTC
Type: Bug
Target Upstream Version:
Embargoed:
pm-rhel: mirror+

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Issue Tracker RHELPLAN-165981 0 None None None 2023-08-17 14:06:54 UTC
Red Hat Issue Tracker SSSD-6641 0 None None None 2023-08-17 14:07:01 UTC
Red Hat Product Errata RHSA-2023:7139 0 None None None 2023-11-14 15:51:05 UTC

Description Andreas Schneider 2023-08-17 11:47:01 UTC 
+++ This bug was initially created as a clone of Bug #2211617 +++

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

--- Additional comment from Pavel Filipensky on 2023-06-12 09:33:40 UTC ---

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.

--- Additional comment from Pavel Filipensky on 2023-08-03 07:50:58 UTC ---

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.
Comment 6 errata-xmlrpc 2023-11-14 15:50:31 UTC 
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-2023:7139
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