Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem?
Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.5 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/v4.5-rc3-wily/ ** Changed in: linux (Ubuntu) Importance: Undecided => High ** Tags added: kernel-da-key -- 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/1543367 Title: nested unprileged container fails to start at mounting /proc Status in linux package in Ubuntu: Incomplete Status in lxc package in Ubuntu: Triaged Bug description: Create a trusty or xenial host. Probably use ubuntu-lxc/daily ppa to work around other bugs. Create a privileged container (again either trusty or xenial will do), and install ubuntu-lxc/daily ppa there. Create an unprivileged container in that container. It will fail at mounting proc using safe_mount. At this point it is mounting proc onto /proc/self/fd/14 flags 14. lxc-start 20160208234209.189 ERROR lxc_utils - utils.c:safe_mount:1695 - Operation not permitted - Failed to mount proc onto /usr/lib/x86_64-linux-gnu/lxc/proc To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1543367/+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
