** Patch added:
"0001-UBUNTU-SAUCE-xenbus-Use-proc_create_mount_point-to-c.patch"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1607374/+attachment/4708767/+files/0001-UBUNTU-SAUCE-xenbus-Use-proc_create_mount_point-to-c.patch
** Changed in: linux (Ubuntu Xenial)
Importance: Undecided => Medium
** Changed in: linux (Ubuntu Xenial)
Status: New => In Progress
** Changed in: linux (Ubuntu Xenial)
Assignee: (unassigned) => Seth Forshee (sforshee)
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https://bugs.launchpad.net/bugs/1607374
Title:
Cannot mount proc in unprivileged containers if /proc/xen is mounted
Status in linux package in Ubuntu:
In Progress
Status in linux source package in Xenial:
In Progress
Bug description:
SRU Justification
Impact: The xenfs filesystem is traditionally mounted at /proc/xen in
xen guests. This directory doesn't use the special "create proc
mountpoint" interface and thus fails the permanently empty test in
fs_fully_visible(). This causes mounting of proc to fail in user
namespace containers.
Fix: Use the special proc interface to make this a "permanently empty"
directory.
Regression potential: This change will make it impossible to create
files within /proc/xen, but since the directory is only ever used as a
mount point this should not cause any problems.
Original bug report and testing results can be found at
https://github.com/lxc/lxd/issues/2238.
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