Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.11 kernel[0].
If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'. If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'. Once testing of the upstream kernel is complete, please mark this bug as "Confirmed". Thanks in advance. [0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.11-rc3 ** Changed in: linux (Ubuntu) Importance: Undecided => Medium ** Tags added: kernel-da-key xenial ** Also affects: linux (Ubuntu Xenial) Importance: Undecided Status: New ** Changed in: linux (Ubuntu Xenial) Importance: Undecided => Medium ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete ** Changed in: linux (Ubuntu Xenial) Status: New => Incomplete -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1675086 Title: Kernel Bug when using nfsroot + overlayroot at the same time Status in linux package in Ubuntu: Incomplete Status in linux source package in Xenial: Incomplete Bug description: Hi, this affects version signature Ubuntu 4.4.0-21.37-generic 4.4.6 (as reported by initramfs), ARCH: amd64 I have installed ubuntu 16.04 via debootstrap in a chroot environment. I can PXE boot this environment via NFS using the following Kernel parameters without a problem: root=/dev/nfs initrd=initrd.gz nfsroot=10.23.23.1:/mnt/lab ip=dhcp ro (initramfs generated with 'mkinitramfs -v -o ~/initrd.img 4.4.0-21-generic'. I can attach the whole initramfs.conf, if desired) As soon as I enable overlayroot (using tmpfs as overlay target), the machine hangs at boot. In order to debug this issue, I have appended the break=init kernel parameter. In busybox I can then see that the overlay is mounted. However, if I try to chroot into it, I get a stacktrace (see attached screenshot). The overlay seems to be readable, but not writeable. ('touch file' works, but there is nothing there afterwards) `apport-collect` is not available in initramfs, therefore no log could be attached. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1675086/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp