[pkg-lxc-devel] Bug#843450: Bug#843450: lxc: Corrupt /proc/self/cgroup / Failed to get list of controllers

[Francois Marier]

On 2016-11-07 at 08:17:09, Evgeni Golov wrote:
> Can you please post the outputs of
>  cat /proc/1/mountinfo

# cat mountinfo | grep cgroup
26 16 0:22 / /sys/fs/cgroup ro,nosuid,nodev,noexec shared:9 - tmpfs tmpfs ro,mode=755
27 26 0:23 / /sys/fs/cgroup/systemd rw,nosuid,nodev,noexec,relatime shared:10 - cgroup2 cgroup rw
29 26 0:25 / /sys/fs/cgroup/net_cls,net_prio rw,nosuid,nodev,noexec,relatime shared:13 - cgroup cgroup rw,net_cls,net_prio
30 26 0:26 / /sys/fs/cgroup/perf_event rw,nosuid,nodev,noexec,relatime shared:14 - cgroup cgroup rw,perf_event
31 26 0:27 / /sys/fs/cgroup/blkio rw,nosuid,nodev,noexec,relatime shared:15 - cgroup cgroup rw,blkio
32 26 0:28 / /sys/fs/cgroup/cpu,cpuacct rw,nosuid,nodev,noexec,relatime shared:16 - cgroup cgroup rw,cpu,cpuacct
33 26 0:29 / /sys/fs/cgroup/memory rw,nosuid,nodev,noexec,relatime shared:17 - cgroup cgroup rw,memory
34 26 0:30 / /sys/fs/cgroup/pids rw,nosuid,nodev,noexec,relatime shared:18 - cgroup cgroup rw,pids
35 26 0:31 / /sys/fs/cgroup/devices rw,nosuid,nodev,noexec,relatime shared:19 - cgroup cgroup rw,devices
36 26 0:32 / /sys/fs/cgroup/cpuset rw,nosuid,nodev,noexec,relatime shared:20 - cgroup cgroup rw,cpuset
37 26 0:33 / /sys/fs/cgroup/freezer rw,nosuid,nodev,noexec,relatime shared:21 - cgroup cgroup rw,freezer

>  cat /proc/self/cgroup

# cat /proc/self/cgroup
9:freezer:/
8:cpuset:/
7:devices:/user.slice
6:pids:/user.slice/user-1000.slice/user at 1000.service
5:memory:/user.slice
4:cpu,cpuacct:/user.slice
3:blkio:/user.slice
2:perf_event:/
1:net_cls,net_prio:/
0::/user.slice/user-1000.slice/user at 1000.service/gnome-terminal-server.service

> I suspect that with kernel 4.8 systemd mounts th cgroup2 fs instead of
> old cgroup and this breaks libpam-cgfs :(
>
> See also https://github.com/lxc/lxc/issues/1280

Indeed that looks exactly like it.

Francois

-- 
https://fmarier.org/