This bug was fixed in the package linux - 3.16.0-9.14
---------------
linux (3.16.0-9.14) utopic; urgency=low
[ Tim Gardner ]
* Release Tracking Bug
- LP: #1357370
[ Serge Hallyn ]
* SAUCE: Overlayfs: allow unprivileged mounts
- LP: #1357025
[ Upstream Kernel Changes ]
* MAINTAINERS: Add entry for APM X-Gene SoC ethernet driver
* Documentation: dts: Add bindings for APM X-Gene SoC ethernet driver
* dts: Add bindings for APM X-Gene SoC ethernet driver
* drivers: net: Add APM X-Gene SoC ethernet driver support.
* powerpc/thp: Add write barrier after updating the valid bit
- LP: #1357014
* powerpc/thp: Don't recompute vsid and ssize in loop on invalidate
- LP: #1357014
* powerpc/thp: Invalidate old 64K based hash page mapping before insert
of 4k pte
- LP: #1357014
* powerpc/thp: Handle combo pages in invalidate
- LP: #1357014
* powerpc/thp: Invalidate with vpn in loop
- LP: #1357014
* powerpc/thp: Use ACCESS_ONCE when loading pmdp
- LP: #1357014
* powerpc/mm: Use read barrier when creating real_pte
- LP: #1357014
* powerpc/thp: Add tracepoints to track hugepage invalidate
- LP: #1357014
* rebase to v3.16.1
-- Tim Gardner <tim.gard...@canonical.com> Thu, 14 Aug 2014 08:18:02 -0400
** Changed in: linux (Ubuntu)
Status: Confirmed => Fix Released
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https://bugs.launchpad.net/bugs/1357025
Title:
unprivileged overlayfs mounts no longer work in utopic
Status in “linux” package in Ubuntu:
Fix Released
Bug description:
In 3.13.0-33-generic, root in a non-init user namespace can do
overlayfs mounts. In 3.16.0-5-generic he cannot.
Test case:
sudo apt-get install lxc
lxc-usernsexec -- /bin/bash # start a containerized root shell
# mkdir /tmp/a /tmp/b /tmp/c
# mount -t overlayfs -o upperdir=/tmp/a,lowerdir=/tmp/b x /tmp/c
This works in trusty, but not in latest utopic.
(A testcase for this will be added to the lxc-tests package, but isn't
there yet)
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