On Sun, 17 Feb 2019, Sudip Mukherjee wrote: > Hi Greg, > > On Mon, Dec 24, 2018 at 12:52:22PM +0100, gregkh@xxxxxxxxxxxxxxxxxxx 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@xxxxxxxxxxxxxxx>. > > The attached backported patch should apply to 4.14-stable tree. > > I think we have a real usecase which is triggering this error and I was > still in the middle of debugging that. But my initial analysis was > showing that the userspace thread was stuck in the indefinite loop. > I have a reliable reproducer of the problem and will setup a test > tomorrow and confirm. There are more patches in that area and you also need a fixed glibc. Thanks, tglx