Thanks for the confirmation Paul, and thanks to all for the assistance with testing and isolation.
We will be deploying this fix (the 'retpoline' patch set) in the next version of the linux-aws kernel (4.4.0-1051.60) and the Xenial generic kernel (4.4.0-113.136).
We'll post here once those builds land in the -proposed archive.
Thanks for the confirmation Paul, and thanks to all for the assistance with testing and isolation.
We will be deploying this fix (the 'retpoline' patch set) in the next version of the linux-aws kernel (4.4.0-1051.60) and the Xenial generic kernel (4.4.0-113.136).
We'll post here once those builds land in the -proposed archive.