If a SMB client is trying to submit a CREATEKEY request via RPC and the request fails due to ACCESS_DENIED, the registry is locked afterwards and any further registry updates are blocked. To unlock the registry again the client connection must be closed.
A fix is already available in master:
4237138 firstname.lastname@example.org registry: Don't leave dangling transactions
Note: this defect exists in all Samba releases
Created attachment 10333 [details]
Patch for 3.6 - 4.2
Applies cleanly to 3.6 up to 4.2
Karo, please push to all releases :-)
Pushed to autobuild-v4[0|1|2]-test.
Pushed to all three branches.
Closing out bug report.