On 1/21/19 4:58 AM, gregkh@linuxfoundation.org wrote:
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.
I am actually not convinced this fix is needed for 4.14 (or earlier). I couldn't reproduce this bug.
I think we also need Pasha Tatashin's time series (38669ba205d1 and friends) for the problem to show up.
-boris