This is essentially the same issue as 1818049 but I am bringing it to the kernel team's attention as it breaks more than just virtualbox: The signature for get_user_pages was changed from -142 to -143, which breaks some out-of-tree or DKMS module builds.
In particular, it breaks even the latest version of parallels tools, which forced me to downgrade to -138 after staying in the office late to try and figure out why the heck it suddenly didn't work. This is a showstopper for anyone using parallels as the behavior they'll see off the bat is that they can no longer log in to a graphical session.
I think it's likely that other out-of-tree modules will be broken as well. It seems like it might be easier to work around this in the kernel itself rather than patch every single other package that tickles it.
This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:
apport-collect 1821843
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the Ubuntu Kernel Team.