** Description changed:

+ [Impact]
+ 
  When attempting to load the sss.so module, on a Bionic box running
  samba-* on 4.7 and sssd-* 1.16.1, one sees the following in syslog:
  
  winbindd[13099]:   load_module_absolute_path: Module 
'/usr/lib/x86_64-linux-gnu/samba/idmap/sss.so' loaded
  winbindd[13099]:   Failed to register idmap module.
  winbindd[13099]:   The module was compiled against 
SMB_IDMAP_INTERFACE_VERSION 5,
  winbindd[13099]:   current SMB_IDMAP_INTERFACE_VERSION is 6.
  
- This issue has been reported before [1], and apparently it made it into
- 1.16.2+ version of sssd, but not into 1.16.1, which is shipped with
- Bionic.
+ This issue has been reported upstream, and made it into 1.16.2+ version
+ of sssd, but not into 1.16.1, which is currently found in Bionic.
  
- Is it possible to backport the mentioned fix into 1.16.1/Bionic?
+ [Test Case]
  
- Thanks!
+ * sudo apt update
+ * sudo apt install sssd winbind
+ * Create this /etc/samba/smb.conf:
+ [global]
+         log file = /var/log/samba/log.%m
+         map to guest = Bad User
+         max log size = 1000
+         panic action = /usr/share/samba/panic-action %d
+         server role = standalone server
+         server string = %h server (Samba, Ubuntu)
+         syslog = 0
+         idmap config * : backend = sss
+         idmap config * : range = 200000-2147483647
  
- [1] https://github.com/SSSD/sssd/pull/572
+ * sudo systemctl restart winbind
+ Run this command to trigger the loading of the sss module. It will fail 
because, among other reasons, this machine is not part of a domain, but that's 
fine:
+ # wbinfo --allocate-uid
+ failed to call wbcAllocateUid: WBC_ERR_DOMAIN_NOT_FOUND
+ Could not allocate a uid
+ 
+ Now /var/log/samba/log.winbindd-idmap will contain:
+ [2019/06/27 17:45:18.420790, 0] 
../source3/winbindd/idmap.c:328(smb_register_idmap)
+   Failed to register idmap module.
+   The module was compiled against SMB_IDMAP_INTERFACE_VERSION 5,
+   current SMB_IDMAP_INTERFACE_VERSION is 6.
+   Please recompile against the current version of samba!
+ [2019/06/27 17:45:18.421110, 0] 
../lib/util/modules.c:173(load_module_absolute_path)
+   load_module_absolute_path: Module 
'/usr/lib/x86_64-linux-gnu/samba/idmap/sss.so' initialization failed: {Wrong 
Type} There is a mismatch between the type of object that is required by the 
requested operation and the type of object that is specified in the request.
+ 
+ This confirms the bug.
+ 
+ [Regression Potential]
+ 
+ [Other informations]
+ 
+ Upstream:
+ https://pagure.io/SSSD/sssd/issue/3741
+ https://github.com/SSSD/sssd/pull/572

** Changed in: sssd (Ubuntu Bionic)
     Assignee: (unassigned) => Eric Desrochers (slashd)

** Changed in: sssd (Ubuntu Bionic)
       Status: Confirmed => In Progress

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https://bugs.launchpad.net/bugs/1834507

Title:
  Attempting to load sss.so in Bionic fails due to
  SMB_IDMAP_INTERFACE_VERSION mismatch

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