Quoting gregkh@linuxfoundation.org (2023-03-06 11:53:29)
The patch below does not apply to the 4.14-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
The Fixes tag of the original git commit is imprecise and would better have been (sorry for that):
Fixes: afdad61615cc ("KVM: s390: Fix storage attributes migration with memory slots")
Since afdad61615cc is not present in the 4.14 tree, no backport is needed here.