[pkg-lxc-devel] Bug#1027798: LXCFS: not updating entries in /proc on arm64

[Marcel Langner]

Package: lxcfs
Version: 4.0.7-1

Using this package version on a Raspberry PI 4 with the host being arm64 
LXC containers (arm32 and arm64) entries in /proc are not usable/not 
being updated_
The following entries are affected (ls -lisa output):
102005 4 -r--r--r--   1 nobody     nogroup    4096 28. Dez 15:10 cpuinfo
102006 4 -r--r--r--   1 nobody     nogroup    4096 28. Dez 15:10 diskstats
102007 4 -r--r--r--   1 nobody     nogroup    4096 28. Dez 15:10 loadavg
102008 4 -r--r--r--   1 nobody     nogroup    4096 28. Dez 15:10 meminfo
102009 4 -r--r--r--   1 nobody     nogroup    4096 28. Dez 15:10 stat
102010 4 -r--r--r--   1 nobody     nogroup    4096 28. Dez 15:10 swaps
102011 4 -r--r--r--   1 nobody     nogroup    4096 28. Dez 15:10 uptime

This also leads to programs like pkill and pgrep to not work properly 
and was the reason I discovered the problem:
$ pgrep test
pgrep: uptime
$

Using the following command inside the container one is able to get the 
/proc entries working again and this does not seem to have any side effects:
/usr/bin/find /proc/ -maxdepth 1 -size 4096c -exec /bin/umount {} \;

According to this discussion https://github.com/lxc/lxcfs/issues/553 the 
bug was just recently fixed here https://github.com/lxc/lxcfs/pull/567.

I am using Raspbian Debian Bullseye 11.2 Linux version 5.15.76-v8+ 
(dom at buildbot) (aarch64-linux-gnu-gcc-8 (Ubuntu/Linaro 8.4.0-3ubuntu1) 
8.4.0, GNU ld (GNU Binutils for Ubuntu) 2.34) #1597 SMP PREEMPT Fri Nov 
4 12:16:41 GMT 2022 and libc6 2.31-13+rpt2+rpi1+deb11u5.

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