We are attempting to test the SQL 2014 SP1 upgrade (KB3058865) in our test environment, but are unable to complete the upgrade and start the instance. 2 of the 3 instances upgraded fine, the 3rd is failing with events 17063, 912 and 3417. This is similar to the previous SP1 patch that was pulled, but it's a different script failing. SSIS is installed with 1 catalog in the SSISDB.
Script level upgrade for database 'master' failed because upgrade step 'ISServer_upgrade.sql' encountered error 6528, state 1, severity 16.
I have brought the instance back online with the -T902 flag, and now the SSISDB is in single user mode. Since this is the latest correct SP1 install, and a different script failing, I'm not sure what the fix/workaround is in this situation.