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ovl: mounting two times the same mount overlayfs will not list any directory entry anymore

DISCUSSION Jordi Pujol Palomer 3 participants 5 messages Sep 12, 2017 – Sep 14, 2017

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Jordi Pujol Palomer

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Hello,

Maybe this is another overlayfs error, only for v4.13; it works well in previous version 4.12.

When mounting two times the same mount, overlayfs will not list any directory entry anymore.

Attached is the script log,

Look for the line:
+lnet-remaster:361:_chroot_mount: mount -o bind /tmp/ /tmp/live-net-remaster-Fg9o5x/chroot/tmp/

Comments:

/tmp/ is already mounted in /tmp/live-net-remaster-Fg9o5x/chroot/tmp/

after mounting /tmp another time in the same location all overlay entries in the chroot directory disappear,
no errors are listed in the log file, dmesg or journalctl.

Thanks,

Jordi Pujol i Palomer

+lnet-remaster:353:_chroot_mount: ls -lA /tmp/live-net-remaster-Fg9o5x/chroot total 24

drwxr-xr-x  2 root root 2398 ago 26 09:40 bin
drwxr-xr-x  2 root root  148 set 12 10:44 boot
drwxr-xr-x  2 root root    3 set 12 10:40 dev
drwxr-xr-x  1 root root 4096 set 12 11:06 etc
drwxr-xr-x  1 root root 4096 set 12 11:06 home
lrwxrwxrwx  1 root root   33 jun 11  2016 initrd.img -> /boot/initrd.img-4.6.2-1-lnet-686
drwxr-xr-x 15 root root  399 ago  8 08:08 lib
drwxr-xr-x  2 root root    3 set 24  2009 media
drwxr-xr-x  2 root root    3 nov 26  2014 mnt
drwxr-xr-x  2 root root    3 set  4  2009 opt
dr-xr-xr-x  2 root root    3 set 12 10:40 proc
drwxr-xr-x  1 root root 4096 set 12 11:06 root
drwxr-xr-x  1 root root 4096 set 12 11:06 run
drwxr-xr-x  2 root root 3304 ago 26 09:46 sbin
drwxr-xr-x  2 root root    3 set  4  2009 srv
dr-xr-xr-x 13 root root    0 set 12 11:06 sys
drwxrwxrwt 11 root root  260 set 12 11:07 tmp
drwxr-xr-x  1 root root 4096 des 19  2011 usr
drwxr-xr-x  1 root root 4096 jun 30  2011 var
lrwxrwxrwx  1 root root   29 jun 11  2016 vmlinuz -> boot/vmlinuz-4.6.2-1-lnet-686

+lnet-remaster:354:_chroot_mount: mount -o bind /dev/ /tmp/live-net-remaster-Fg9o5x/chroot/dev +lnet-remaster:355:_chroot_mount: ls -lA /tmp/live-net-remaster-Fg9o5x/chroot total 24
drwxr-xr-x 2 root root 2398 ago 26 09:40 bin
drwxr-xr-x 2 root root 148 set 12 10:44 boot
drwxr-xr-x 19 root root 3420 set 12 11:06 dev

drwxr-xr-x  1 root root 4096 set 12 11:06 etc
drwxr-xr-x  1 root root 4096 set 12 11:06 home
lrwxrwxrwx  1 root root   33 jun 11  2016 initrd.img -> /boot/initrd.img-4.6.2-1-lnet-686
drwxr-xr-x 15 root root  399 ago  8 08:08 lib
drwxr-xr-x  2 root root    3 set 24  2009 media
drwxr-xr-x  2 root root    3 nov 26  2014 mnt
drwxr-xr-x  2 root root    3 set  4  2009 opt
dr-xr-xr-x  2 root root    3 set 12 10:40 proc
drwxr-xr-x  1 root root 4096 set 12 11:06 root
drwxr-xr-x  1 root root 4096 set 12 11:06 run
drwxr-xr-x  2 root root 3304 ago 26 09:46 sbin
drwxr-xr-x  2 root root    3 set  4  2009 srv
dr-xr-xr-x 13 root root    0 set 12 11:06 sys
drwxrwxrwt 11 root root  260 set 12 11:07 tmp
drwxr-xr-x  1 root root 4096 des 19  2011 usr
drwxr-xr-x  1 root root 4096 jun 30  2011 var
lrwxrwxrwx  1 root root   29 jun 11  2016 vmlinuz -> boot/vmlinuz-4.6.2-1-lnet-686

+lnet-remaster:356:_chroot_mount: mount -o bind /dev/pts /tmp/live-net-remaster-Fg9o5x/chroot/dev/pts +lnet-remaster:357:_chroot_mount: ls -lA /tmp/live-net-remaster-Fg9o5x/chroot
total 24
drwxr-xr-x 2 root root 2398 ago 26 09:40 bin
drwxr-xr-x 2 root root 148 set 12 10:44 boot
drwxr-xr-x 19 root root 3420 set 12 11:06 dev

drwxr-xr-x  1 root root 4096 set 12 11:06 etc
drwxr-xr-x  1 root root 4096 set 12 11:06 home
lrwxrwxrwx  1 root root   33 jun 11  2016 initrd.img -> /boot/initrd.img-4.6.2-1-lnet-686
drwxr-xr-x 15 root root  399 ago  8 08:08 lib
drwxr-xr-x  2 root root    3 set 24  2009 media
drwxr-xr-x  2 root root    3 nov 26  2014 mnt
drwxr-xr-x  2 root root    3 set  4  2009 opt
dr-xr-xr-x  2 root root    3 set 12 10:40 proc
drwxr-xr-x  1 root root 4096 set 12 11:06 root
drwxr-xr-x  1 root root 4096 set 12 11:06 run
drwxr-xr-x  2 root root 3304 ago 26 09:46 sbin
drwxr-xr-x  2 root root    3 set  4  2009 srv
dr-xr-xr-x 13 root root    0 set 12 11:06 sys
drwxrwxrwt 11 root root  260 set 12 11:07 tmp
drwxr-xr-x  1 root root 4096 des 19  2011 usr
drwxr-xr-x  1 root root 4096 jun 30  2011 var
lrwxrwxrwx  1 root root   29 jun 11  2016 vmlinuz -> boot/vmlinuz-4.6.2-1-lnet-686

+lnet-remaster:358:_chroot_mount: mount -o bind /sys /tmp/live-net-remaster-Fg9o5x/chroot/sys +lnet-remaster:359:_chroot_mount: ls -lA /tmp/live-net-remaster-Fg9o5x/chroot total 24
drwxr-xr-x 2 root root 2398 ago 26 09:40 bin
drwxr-xr-x 2 root root 148 set 12 10:44 boot
drwxr-xr-x 19 root root 3420 set 12 11:06 dev

drwxr-xr-x  1 root root 4096 set 12 11:06 etc
drwxr-xr-x  1 root root 4096 set 12 11:06 home
lrwxrwxrwx  1 root root   33 jun 11  2016 initrd.img -> /boot/initrd.img-4.6.2-1-lnet-686
drwxr-xr-x 15 root root  399 ago  8 08:08 lib
drwxr-xr-x  2 root root    3 set 24  2009 media
drwxr-xr-x  2 root root    3 nov 26  2014 mnt
drwxr-xr-x  2 root root    3 set  4  2009 opt
dr-xr-xr-x  2 root root    3 set 12 10:40 proc
drwxr-xr-x  1 root root 4096 set 12 11:06 root
drwxr-xr-x  1 root root 4096 set 12 11:06 run
drwxr-xr-x  2 root root 3304 ago 26 09:46 sbin
drwxr-xr-x  2 root root    3 set  4  2009 srv
dr-xr-xr-x 13 root root    0 set 12 11:06 sys
drwxrwxrwt 11 root root  260 set 12 11:07 tmp
drwxr-xr-x  1 root root 4096 des 19  2011 usr
drwxr-xr-x  1 root root 4096 jun 30  2011 var
lrwxrwxrwx  1 root root   29 jun 11  2016 vmlinuz -> boot/vmlinuz-4.6.2-1-lnet-686

+lnet-remaster:360:_chroot_mount: mount-list
sysfs /sys sysfs nodev,noexec,nosuid,relatime,rw sysfs 0:17
proc /proc proc nodev,noexec,nosuid,relatime,rw proc 0:5
udev /dev devtmpfs mode=755,nosuid,nr_inodes=978526,relatime,rw,size=3914104k udev 0:6
devpts /dev/pts devpts gid=5,mode=620,noexec,nosuid,ptmxmode=000,relatime,rw devpts 0:18
tmpfs /run tmpfs mode=755,noexec,nosuid,relatime,rw,size=786156k tmpfs 0:19
tmpfs /lnet tmpfs mode=755,relatime,rw,size=7861540k tmpfs 0:20
/dev/sda1 /lnet/image ext2 errors=continue,noacl,noatime,nouser_xattr,ro /dev/sda1 8:1
/lnet/image/LneTXFCE64/00filesystem.squashfs /lnet/00filesystem.squashfs squashfs noatime,ro,loop=/dev/loop0 /dev/loop0 7:0
/lnet/image/LneTXFCE64/10interfaces.squashfs /lnet/10interfaces.squashfs squashfs noatime,ro,loop=/dev/loop1 /dev/loop1 7:1
/dev/sda2 /lnet/cowroot ext4 data=ordered,relatime,rw /dev/sda2 8:2
overlay / overlay index=off,lowerdir=/lnet/00filesystem.squashfs:/lnet/10interfaces.squashfs,relatime,rw,upperdir=/lnet/cowroot/LneTXFCECOW/upper,workdir=/lnet/cowroot/LneTXFCECOW/work overlay 0:21
tmpfs /tmp tmpfs nodev,nosuid,relatime,rw,size=7861540k,mode=1777 tmpfs 0:22
tmpfs /var/log tmpfs mode=755,nosuid,relatime,rw,size=7861540k tmpfs 0:23
tmpfs /var/tmp tmpfs nodev,nosuid,relatime,rw,size=7861540k,mode=1777 tmpfs 0:24
securityfs /sys/kernel/security securityfs nodev,noexec,nosuid,relatime,rw securityfs 0:7
tmpfs /dev/shm tmpfs nodev,nosuid,rw,mode=1777 tmpfs 0:25
tmpfs /run/lock tmpfs nodev,noexec,nosuid,relatime,rw,size=5120k,mode=1777 tmpfs 0:26
tmpfs /sys/fs/cgroup tmpfs mode=755,nodev,noexec,nosuid,ro tmpfs 0:27
cgroup /sys/fs/cgroup/unified cgroup2 nodev,noexec,nosuid,relatime,rw cgroup 0:28
cgroup /sys/fs/cgroup/systemd cgroup name=systemd,nodev,noexec,nosuid,relatime,rw,xattr cgroup 0:29
pstore /sys/fs/pstore pstore nodev,noexec,nosuid,relatime,rw pstore 0:30
cgroup /sys/fs/cgroup/cpu cgroup cpu,nodev,noexec,nosuid,relatime,rw cgroup 0:31
systemd-1 /proc/sys/fs/binfmt_misc autofs direct,fd=32,maxproto=5,minproto=5,pgrp=1,relatime,rw,timeout=0 systemd-1 0:32
/lnet/cowroot/LneTXFCEhome /home none rw,bind /dev/sda2 8:2
/lnet/image/LneTXFCE64 /boot none ro,bind /dev/sda1 8:1
debugfs /sys/kernel/debug debugfs relatime,rw debugfs 0:8
mqueue /dev/mqueue mqueue relatime,rw mqueue 0:16
hugetlbfs /dev/hugepages hugetlbfs pagesize=2M,relatime,rw hugetlbfs 0:33
/lnet/image/grub /boot/grub none ro,bind /dev/sda1 8:1
/lnet/image/grub /lnet/image/LneTXFCE64/grub none ro,bind /dev/sda1 8:1
/lnet/cowroot/JPLive /home/JPLive none rw,bind /dev/sda2 8:2
/lnet/cowroot/JPLive /lnet/cowroot/LneTXFCEhome/JPLive none rw,bind /dev/sda2 8:2
/lnet/cowroot/JPLive/apt-cache-amd64 /var/cache/apt none rw,bind /dev/sda2 8:2
/lnet/cowroot/JPLive/apt-lib-amd64 /var/lib/apt none rw,bind /dev/sda2 8:2
/lnet/cowroot/LneTXFCEhome/root /root none rw,bind /dev/sda2 8:2
/lnet/cowroot/JPLive/var-spool /var/spool none rw,bind /dev/sda2 8:2
tmpfs /run/user/1001 tmpfs gid=100,mode=700,nodev,nosuid,relatime,rw,size=786152k,uid=1001 tmpfs 0:37
/home/JPLive/LneT-Lite-686/iso/LneT-Lite/00filesystem.squashfs /tmp/live-net-remaster-Fg9o5x/image/00filesystem.squashfs squashfs relatime,ro,loop=/dev/loop2 /dev/loop2 7:2
overlay /tmp/live-net-remaster-Fg9o5x/chroot overlay index=off,lowerdir=/tmp/live-net-remaster-Fg9o5x/image/00filesystem.squashfs,relatime,rw,upperdir=/home/tmp.uqIFpoBStR/upper,workdir=/home/tmp.uqIFpoBStR/work overlay 0:39
/sys/ /tmp/live-net-remaster-Fg9o5x/chroot/sys none rw,bind sysfs 0:17
/tmp/ /tmp/live-net-remaster-Fg9o5x/chroot/tmp none rw,bind tmpfs 0:22
/dev/ /tmp/live-net-remaster-Fg9o5x/chroot/dev none rw,bind udev 0:6
/dev/pts/ /tmp/live-net-remaster-Fg9o5x/chroot/dev/pts none rw,bind devpts 0:18
/dev/pts/ /dev/pts none rw,bind devpts 0:18
/sys/ /tmp/live-net-remaster-Fg9o5x/chroot/sys none rw,bind sysfs 0:17
/sys/ /sys none rw,bind sysfs 0:17
+lnet-remaster:361:_chroot_mount: mount -o bind /tmp/ /tmp/live-net-remaster-Fg9o5x/chroot/tmp/ +lnet-remaster:362:_chroot_mount: ls -lA /tmp/live-net-remaster-Fg9o5x/chroot
total 0
+lnet-remaster:363:_chroot_mount: mount-list
sysfs /sys sysfs nodev,noexec,nosuid,relatime,rw sysfs 0:17
proc /proc proc nodev,noexec,nosuid,relatime,rw proc 0:5
udev /dev devtmpfs mode=755,nosuid,nr_inodes=978526,relatime,rw,size=3914104k udev 0:6
devpts /dev/pts devpts gid=5,mode=620,noexec,nosuid,ptmxmode=000,relatime,rw devpts 0:18
tmpfs /run tmpfs mode=755,noexec,nosuid,relatime,rw,size=786156k tmpfs 0:19
tmpfs /lnet tmpfs mode=755,relatime,rw,size=7861540k tmpfs 0:20
/dev/sda1 /lnet/image ext2 errors=continue,noacl,noatime,nouser_xattr,ro /dev/sda1 8:1
/lnet/image/LneTXFCE64/00filesystem.squashfs /lnet/00filesystem.squashfs squashfs noatime,ro,loop=/dev/loop0 /dev/loop0 7:0
/lnet/image/LneTXFCE64/10interfaces.squashfs /lnet/10interfaces.squashfs squashfs noatime,ro,loop=/dev/loop1 /dev/loop1 7:1
/dev/sda2 /lnet/cowroot ext4 data=ordered,relatime,rw /dev/sda2 8:2
overlay / overlay index=off,lowerdir=/lnet/00filesystem.squashfs:/lnet/10interfaces.squashfs,relatime,rw,upperdir=/lnet/cowroot/LneTXFCECOW/upper,workdir=/lnet/cowroot/LneTXFCECOW/work overlay 0:21
tmpfs /tmp tmpfs nodev,nosuid,relatime,rw,size=7861540k,mode=1777 tmpfs 0:22
tmpfs /var/log tmpfs mode=755,nosuid,relatime,rw,size=7861540k tmpfs 0:23
tmpfs /var/tmp tmpfs nodev,nosuid,relatime,rw,size=7861540k,mode=1777 tmpfs 0:24
securityfs /sys/kernel/security securityfs nodev,noexec,nosuid,relatime,rw securityfs 0:7
tmpfs /dev/shm tmpfs nodev,nosuid,rw,mode=1777 tmpfs 0:25
tmpfs /run/lock tmpfs nodev,noexec,nosuid,relatime,rw,size=5120k,mode=1777 tmpfs 0:26
tmpfs /sys/fs/cgroup tmpfs mode=755,nodev,noexec,nosuid,ro tmpfs 0:27
cgroup /sys/fs/cgroup/unified cgroup2 nodev,noexec,nosuid,relatime,rw cgroup 0:28
cgroup /sys/fs/cgroup/systemd cgroup name=systemd,nodev,noexec,nosuid,relatime,rw,xattr cgroup 0:29
pstore /sys/fs/pstore pstore nodev,noexec,nosuid,relatime,rw pstore 0:30
cgroup /sys/fs/cgroup/cpu cgroup cpu,nodev,noexec,nosuid,relatime,rw cgroup 0:31
systemd-1 /proc/sys/fs/binfmt_misc autofs direct,fd=32,maxproto=5,minproto=5,pgrp=1,relatime,rw,timeout=0 systemd-1 0:32
/lnet/cowroot/LneTXFCEhome /home none rw,bind /dev/sda2 8:2
/lnet/image/LneTXFCE64 /boot none ro,bind /dev/sda1 8:1
debugfs /sys/kernel/debug debugfs relatime,rw debugfs 0:8
mqueue /dev/mqueue mqueue relatime,rw mqueue 0:16
hugetlbfs /dev/hugepages hugetlbfs pagesize=2M,relatime,rw hugetlbfs 0:33
/lnet/image/grub /boot/grub none ro,bind /dev/sda1 8:1
/lnet/image/grub /lnet/image/LneTXFCE64/grub none ro,bind /dev/sda1 8:1
/lnet/cowroot/JPLive /home/JPLive none rw,bind /dev/sda2 8:2
/lnet/cowroot/JPLive /lnet/cowroot/LneTXFCEhome/JPLive none rw,bind /dev/sda2 8:2
/lnet/cowroot/JPLive/apt-cache-amd64 /var/cache/apt none rw,bind /dev/sda2 8:2
/lnet/cowroot/JPLive/apt-lib-amd64 /var/lib/apt none rw,bind /dev/sda2 8:2
/lnet/cowroot/LneTXFCEhome/root /root none rw,bind /dev/sda2 8:2
/lnet/cowroot/JPLive/var-spool /var/spool none rw,bind /dev/sda2 8:2
tmpfs /run/user/1001 tmpfs gid=100,mode=700,nodev,nosuid,relatime,rw,size=786152k,uid=1001 tmpfs 0:37
/home/JPLive/LneT-Lite-686/iso/LneT-Lite/00filesystem.squashfs /tmp/live-net-remaster-Fg9o5x/image/00filesystem.squashfs squashfs relatime,ro,loop=/dev/loop2 /dev/loop2 7:2
overlay /tmp/live-net-remaster-Fg9o5x/chroot overlay index=off,lowerdir=/tmp/live-net-remaster-Fg9o5x/image/00filesystem.squashfs,relatime,rw,upperdir=/home/tmp.uqIFpoBStR/upper,workdir=/home/tmp.uqIFpoBStR/work overlay 0:39
/sys/ /tmp/live-net-remaster-Fg9o5x/chroot/sys none rw,bind sysfs 0:17
/tmp/ /tmp/live-net-remaster-Fg9o5x/chroot/tmp none rw,bind tmpfs 0:22
/dev/ /tmp/live-net-remaster-Fg9o5x/chroot/dev none rw,bind udev 0:6
/dev/pts/ /tmp/live-net-remaster-Fg9o5x/chroot/dev/pts none rw,bind devpts 0:18
/dev/pts/ /dev/pts none rw,bind devpts 0:18
/sys/ /tmp/live-net-remaster-Fg9o5x/chroot/sys none rw,bind sysfs 0:17
/sys/ /sys none rw,bind sysfs 0:17
/tmp/ /tmp/live-net-remaster-Fg9o5x/chroot/tmp none rw,bind tmpfs 0:22
/tmp/ /tmp none rw,bind tmpfs 0:22
+lnet-remaster:364:_chroot_mount: '[' -z 'mkdir -p ${BASE_CHROOT}/home/JPLive; mount -o bind /home/JPLive ${BASE_CHROOT}/home/JPLive' ']' +lnet-remaster:365:_chroot_mount: eval mkdir -p '${BASE_CHROOT}/home/JPLive;' mount -o bind /home/JPLive '${BASE_CHROOT}/home/JPLive' ++lnet-remaster:365:_chroot_mount: mkdir -p /tmp/live-net-remaster-Fg9o5x/chroot/home/JPLive ++lnet-remaster:365:_chroot_mount: mount -o bind /home/JPLive /tmp/live-net-remaster-Fg9o5x/chroot/home/JPLive +lnet-remaster:366:_chroot_mount: ls -lA /tmp/live-net-remaster-Fg9o5x/chroot
total 0
drwxr-xr-x 3 root root 60 set 12 11:07 home
+lnet-remaster:368:_chroot_mount: export DISPLAY=:0.0
+lnet-remaster:368:_chroot_mount: DISPLAY=:0.0
+lnet-remaster:369:_chroot_mount: export HOME=/root
+lnet-remaster:369:_chroot_mount: HOME=/root
+lnet-remaster:370:_chroot_mount: export LC_ALL=C
+lnet-remaster:370:_chroot_mount: LC_ALL=C
+lnet-remaster:372:_chroot_mount: '[' '!' -L /tmp/live-net-remaster-Fg9o5x/chroot/etc/mtab ']' +lnet-remaster:374:_chroot_mount: rm -f /tmp/live-net-remaster-Fg9o5x/chroot/etc/mtab +lnet-remaster:375:_chroot_mount: ln -fs /proc/mounts /tmp/live-net-remaster-Fg9o5x/chroot/etc/mtab +lnet-remaster:375:_chroot_mount: :
+lnet-remaster:377:_chroot_mount: cp /etc/hosts /tmp/live-net-remaster-Fg9o5x/chroot/etc/ +lnet-remaster:378:_chroot_mount: ls -lA /tmp/live-net-remaster-Fg9o5x/chroot
total 0
drwxr-xr-x 3 root root 60 Sep 12 11:07 home
+lnet-remaster:380:_chroot_mount: chroot /tmp/live-net-remaster-Fg9o5x/chroot/ mount -t proc none /proc +lnet-remaster:381:_chroot_mount: ls -lA /tmp/live-net-remaster-Fg9o5x/chroot
total 0
drwxr-xr-x 3 root root 60 Sep 12 11:07 home
+lnet-remaster:382:_chroot_mount: :
+lnet-remaster:736:_prepare_web_database: _chroot_mount_compress
+lnet-remaster:395:_chroot_mount_compress: mkdir -p /tmp/live-net-remaster-Fg9o5x/chroot/var/tmp/mnt/ +lnet-remaster:396:_chroot_mount_compress: mount -o bind /home/JPLive/LneT-Lite-686 /tmp/live-net-remaster-Fg9o5x/chroot/var/tmp/mnt/ +lnet-remaster:397:_chroot_mount_compress: ls -lA /tmp/live-net-remaster-Fg9o5x/chroot
total 0
drwxr-xr-x 3 root root 60 Sep 12 11:07 home
drwxr-xr-x 3 root root 60 Sep 12 11:07 var
+lnet-remaster:398:_chroot_mount_compress: :
+lnet-remaster:737:_prepare_web_database: chroot /tmp/live-net-remaster-Fg9o5x/chroot/ sh +lnet-remaster:857:_prepare_web_database: echo 'Error: when preparing web database.' +lnet-remaster:858:_prepare_web_database: return 1
+lnet-remaster:1505: exit 1

#1 lore raw
Quoted 8 lines · Jordi Pujol Palomer

Hello,

Maybe this is another overlayfs error, only for v4.13; it works well in previous version 4.12.

When mounting two times the same mount, overlayfs will not list any directory entry anymore.

This does not smell like overlayfs issue to me, but more like bind mount issue, so adding some mount ns folks in CC.

Quoted 6 lines

Attached is the script log,

Look for the line:
+lnet-remaster:361:_chroot_mount: mount -o bind /tmp/ /tmp/live-net-remaster-Fg9o5x/chroot/tmp/

Quoted 7 lines

Comments:

/tmp/ is already mounted in /tmp/live-net-remaster-Fg9o5x/chroot/tmp/

after mounting /tmp another time in the same location all overlay entries in the chroot directory disappear,
no errors are listed in the log file, dmesg or journalctl.

So is this reproducible at every run with v4.13?
Are you able to try this without overlayfs? i.e. chroot to squashfs mount? I am guessing there is nothing important in upper layer when this error occurs, Am I right? does script need write to chroot path before this error occurs?

Amir.

+lnet-remaster:353:_chroot_mount: ls -lA /tmp/live-net-remaster-Fg9o5x/chroot total 24

drwxr-xr-x  2 root root 2398 ago 26 09:40 bin
drwxr-xr-x  2 root root  148 set 12 10:44 boot
drwxr-xr-x  2 root root    3 set 12 10:40 dev
drwxr-xr-x  1 root root 4096 set 12 11:06 etc
drwxr-xr-x  1 root root 4096 set 12 11:06 home
lrwxrwxrwx  1 root root   33 jun 11  2016 initrd.img -> /boot/initrd.img-4.6.2-1-lnet-686
drwxr-xr-x 15 root root  399 ago  8 08:08 lib
drwxr-xr-x  2 root root    3 set 24  2009 media
drwxr-xr-x  2 root root    3 nov 26  2014 mnt
drwxr-xr-x  2 root root    3 set  4  2009 opt
dr-xr-xr-x  2 root root    3 set 12 10:40 proc
drwxr-xr-x  1 root root 4096 set 12 11:06 root
drwxr-xr-x  1 root root 4096 set 12 11:06 run
drwxr-xr-x  2 root root 3304 ago 26 09:46 sbin
drwxr-xr-x  2 root root    3 set  4  2009 srv
dr-xr-xr-x 13 root root    0 set 12 11:06 sys
drwxrwxrwt 11 root root  260 set 12 11:07 tmp
drwxr-xr-x  1 root root 4096 des 19  2011 usr
drwxr-xr-x  1 root root 4096 jun 30  2011 var
lrwxrwxrwx  1 root root   29 jun 11  2016 vmlinuz -> boot/vmlinuz-4.6.2-1-lnet-686

+lnet-remaster:354:_chroot_mount: mount -o bind /dev/ /tmp/live-net-remaster-Fg9o5x/chroot/dev +lnet-remaster:355:_chroot_mount: ls -lA /tmp/live-net-remaster-Fg9o5x/chroot total 24
drwxr-xr-x 2 root root 2398 ago 26 09:40 bin
drwxr-xr-x 2 root root 148 set 12 10:44 boot
drwxr-xr-x 19 root root 3420 set 12 11:06 dev

drwxr-xr-x  1 root root 4096 set 12 11:06 etc
drwxr-xr-x  1 root root 4096 set 12 11:06 home
lrwxrwxrwx  1 root root   33 jun 11  2016 initrd.img -> /boot/initrd.img-4.6.2-1-lnet-686
drwxr-xr-x 15 root root  399 ago  8 08:08 lib
drwxr-xr-x  2 root root    3 set 24  2009 media
drwxr-xr-x  2 root root    3 nov 26  2014 mnt
drwxr-xr-x  2 root root    3 set  4  2009 opt
dr-xr-xr-x  2 root root    3 set 12 10:40 proc
drwxr-xr-x  1 root root 4096 set 12 11:06 root
drwxr-xr-x  1 root root 4096 set 12 11:06 run
drwxr-xr-x  2 root root 3304 ago 26 09:46 sbin
drwxr-xr-x  2 root root    3 set  4  2009 srv
dr-xr-xr-x 13 root root    0 set 12 11:06 sys
drwxrwxrwt 11 root root  260 set 12 11:07 tmp
drwxr-xr-x  1 root root 4096 des 19  2011 usr
drwxr-xr-x  1 root root 4096 jun 30  2011 var
lrwxrwxrwx  1 root root   29 jun 11  2016 vmlinuz -> boot/vmlinuz-4.6.2-1-lnet-686

+lnet-remaster:356:_chroot_mount: mount -o bind /dev/pts /tmp/live-net-remaster-Fg9o5x/chroot/dev/pts +lnet-remaster:357:_chroot_mount: ls -lA /tmp/live-net-remaster-Fg9o5x/chroot
total 24
drwxr-xr-x 2 root root 2398 ago 26 09:40 bin
drwxr-xr-x 2 root root 148 set 12 10:44 boot
drwxr-xr-x 19 root root 3420 set 12 11:06 dev

drwxr-xr-x  1 root root 4096 set 12 11:06 etc
drwxr-xr-x  1 root root 4096 set 12 11:06 home
lrwxrwxrwx  1 root root   33 jun 11  2016 initrd.img -> /boot/initrd.img-4.6.2-1-lnet-686
drwxr-xr-x 15 root root  399 ago  8 08:08 lib
drwxr-xr-x  2 root root    3 set 24  2009 media
drwxr-xr-x  2 root root    3 nov 26  2014 mnt
drwxr-xr-x  2 root root    3 set  4  2009 opt
dr-xr-xr-x  2 root root    3 set 12 10:40 proc
drwxr-xr-x  1 root root 4096 set 12 11:06 root
drwxr-xr-x  1 root root 4096 set 12 11:06 run
drwxr-xr-x  2 root root 3304 ago 26 09:46 sbin
drwxr-xr-x  2 root root    3 set  4  2009 srv
dr-xr-xr-x 13 root root    0 set 12 11:06 sys
drwxrwxrwt 11 root root  260 set 12 11:07 tmp
drwxr-xr-x  1 root root 4096 des 19  2011 usr
drwxr-xr-x  1 root root 4096 jun 30  2011 var
lrwxrwxrwx  1 root root   29 jun 11  2016 vmlinuz -> boot/vmlinuz-4.6.2-1-lnet-686

+lnet-remaster:358:_chroot_mount: mount -o bind /sys /tmp/live-net-remaster-Fg9o5x/chroot/sys +lnet-remaster:359:_chroot_mount: ls -lA /tmp/live-net-remaster-Fg9o5x/chroot total 24
drwxr-xr-x 2 root root 2398 ago 26 09:40 bin
drwxr-xr-x 2 root root 148 set 12 10:44 boot
drwxr-xr-x 19 root root 3420 set 12 11:06 dev

drwxr-xr-x  1 root root 4096 set 12 11:06 etc
drwxr-xr-x  1 root root 4096 set 12 11:06 home
lrwxrwxrwx  1 root root   33 jun 11  2016 initrd.img -> /boot/initrd.img-4.6.2-1-lnet-686
drwxr-xr-x 15 root root  399 ago  8 08:08 lib
drwxr-xr-x  2 root root    3 set 24  2009 media
drwxr-xr-x  2 root root    3 nov 26  2014 mnt
drwxr-xr-x  2 root root    3 set  4  2009 opt
dr-xr-xr-x  2 root root    3 set 12 10:40 proc
drwxr-xr-x  1 root root 4096 set 12 11:06 root
drwxr-xr-x  1 root root 4096 set 12 11:06 run
drwxr-xr-x  2 root root 3304 ago 26 09:46 sbin
drwxr-xr-x  2 root root    3 set  4  2009 srv
dr-xr-xr-x 13 root root    0 set 12 11:06 sys
drwxrwxrwt 11 root root  260 set 12 11:07 tmp
drwxr-xr-x  1 root root 4096 des 19  2011 usr
drwxr-xr-x  1 root root 4096 jun 30  2011 var
lrwxrwxrwx  1 root root   29 jun 11  2016 vmlinuz -> boot/vmlinuz-4.6.2-1-lnet-686

+lnet-remaster:360:_chroot_mount: mount-list
sysfs /sys sysfs nodev,noexec,nosuid,relatime,rw sysfs 0:17
proc /proc proc nodev,noexec,nosuid,relatime,rw proc 0:5
udev /dev devtmpfs mode=755,nosuid,nr_inodes=978526,relatime,rw,size=3914104k udev 0:6
devpts /dev/pts devpts gid=5,mode=620,noexec,nosuid,ptmxmode=000,relatime,rw devpts 0:18
tmpfs /run tmpfs mode=755,noexec,nosuid,relatime,rw,size=786156k tmpfs 0:19
tmpfs /lnet tmpfs mode=755,relatime,rw,size=7861540k tmpfs 0:20
/dev/sda1 /lnet/image ext2 errors=continue,noacl,noatime,nouser_xattr,ro /dev/sda1 8:1
/lnet/image/LneTXFCE64/00filesystem.squashfs /lnet/00filesystem.squashfs squashfs noatime,ro,loop=/dev/loop0 /dev/loop0 7:0
/lnet/image/LneTXFCE64/10interfaces.squashfs /lnet/10interfaces.squashfs squashfs noatime,ro,loop=/dev/loop1 /dev/loop1 7:1
/dev/sda2 /lnet/cowroot ext4 data=ordered,relatime,rw /dev/sda2 8:2
overlay / overlay index=off,lowerdir=/lnet/00filesystem.squashfs:/lnet/10interfaces.squashfs,relatime,rw,upperdir=/lnet/cowroot/LneTXFCECOW/upper,workdir=/lnet/cowroot/LneTXFCECOW/work overlay 0:21
tmpfs /tmp tmpfs nodev,nosuid,relatime,rw,size=7861540k,mode=1777 tmpfs 0:22
tmpfs /var/log tmpfs mode=755,nosuid,relatime,rw,size=7861540k tmpfs 0:23
tmpfs /var/tmp tmpfs nodev,nosuid,relatime,rw,size=7861540k,mode=1777 tmpfs 0:24
securityfs /sys/kernel/security securityfs nodev,noexec,nosuid,relatime,rw securityfs 0:7
tmpfs /dev/shm tmpfs nodev,nosuid,rw,mode=1777 tmpfs 0:25
tmpfs /run/lock tmpfs nodev,noexec,nosuid,relatime,rw,size=5120k,mode=1777 tmpfs 0:26
tmpfs /sys/fs/cgroup tmpfs mode=755,nodev,noexec,nosuid,ro tmpfs 0:27
cgroup /sys/fs/cgroup/unified cgroup2 nodev,noexec,nosuid,relatime,rw cgroup 0:28
cgroup /sys/fs/cgroup/systemd cgroup name=systemd,nodev,noexec,nosuid,relatime,rw,xattr cgroup 0:29
pstore /sys/fs/pstore pstore nodev,noexec,nosuid,relatime,rw pstore 0:30
cgroup /sys/fs/cgroup/cpu cgroup cpu,nodev,noexec,nosuid,relatime,rw cgroup 0:31
systemd-1 /proc/sys/fs/binfmt_misc autofs direct,fd=32,maxproto=5,minproto=5,pgrp=1,relatime,rw,timeout=0 systemd-1 0:32
/lnet/cowroot/LneTXFCEhome /home none rw,bind /dev/sda2 8:2
/lnet/image/LneTXFCE64 /boot none ro,bind /dev/sda1 8:1
debugfs /sys/kernel/debug debugfs relatime,rw debugfs 0:8
mqueue /dev/mqueue mqueue relatime,rw mqueue 0:16
hugetlbfs /dev/hugepages hugetlbfs pagesize=2M,relatime,rw hugetlbfs 0:33
/lnet/image/grub /boot/grub none ro,bind /dev/sda1 8:1
/lnet/image/grub /lnet/image/LneTXFCE64/grub none ro,bind /dev/sda1 8:1
/lnet/cowroot/JPLive /home/JPLive none rw,bind /dev/sda2 8:2
/lnet/cowroot/JPLive /lnet/cowroot/LneTXFCEhome/JPLive none rw,bind /dev/sda2 8:2
/lnet/cowroot/JPLive/apt-cache-amd64 /var/cache/apt none rw,bind /dev/sda2 8:2
/lnet/cowroot/JPLive/apt-lib-amd64 /var/lib/apt none rw,bind /dev/sda2 8:2
/lnet/cowroot/LneTXFCEhome/root /root none rw,bind /dev/sda2 8:2
/lnet/cowroot/JPLive/var-spool /var/spool none rw,bind /dev/sda2 8:2
tmpfs /run/user/1001 tmpfs gid=100,mode=700,nodev,nosuid,relatime,rw,size=786152k,uid=1001 tmpfs 0:37
/home/JPLive/LneT-Lite-686/iso/LneT-Lite/00filesystem.squashfs /tmp/live-net-remaster-Fg9o5x/image/00filesystem.squashfs squashfs relatime,ro,loop=/dev/loop2 /dev/loop2 7:2
overlay /tmp/live-net-remaster-Fg9o5x/chroot overlay index=off,lowerdir=/tmp/live-net-remaster-Fg9o5x/image/00filesystem.squashfs,relatime,rw,upperdir=/home/tmp.uqIFpoBStR/upper,workdir=/home/tmp.uqIFpoBStR/work overlay 0:39
/sys/ /tmp/live-net-remaster-Fg9o5x/chroot/sys none rw,bind sysfs 0:17
/tmp/ /tmp/live-net-remaster-Fg9o5x/chroot/tmp none rw,bind tmpfs 0:22
/dev/ /tmp/live-net-remaster-Fg9o5x/chroot/dev none rw,bind udev 0:6
/dev/pts/ /tmp/live-net-remaster-Fg9o5x/chroot/dev/pts none rw,bind devpts 0:18
/dev/pts/ /dev/pts none rw,bind devpts 0:18
/sys/ /tmp/live-net-remaster-Fg9o5x/chroot/sys none rw,bind sysfs 0:17
/sys/ /sys none rw,bind sysfs 0:17
+lnet-remaster:361:_chroot_mount: mount -o bind /tmp/ /tmp/live-net-remaster-Fg9o5x/chroot/tmp/ +lnet-remaster:362:_chroot_mount: ls -lA /tmp/live-net-remaster-Fg9o5x/chroot
total 0
+lnet-remaster:363:_chroot_mount: mount-list
sysfs /sys sysfs nodev,noexec,nosuid,relatime,rw sysfs 0:17
proc /proc proc nodev,noexec,nosuid,relatime,rw proc 0:5
udev /dev devtmpfs mode=755,nosuid,nr_inodes=978526,relatime,rw,size=3914104k udev 0:6
devpts /dev/pts devpts gid=5,mode=620,noexec,nosuid,ptmxmode=000,relatime,rw devpts 0:18
tmpfs /run tmpfs mode=755,noexec,nosuid,relatime,rw,size=786156k tmpfs 0:19
tmpfs /lnet tmpfs mode=755,relatime,rw,size=7861540k tmpfs 0:20
/dev/sda1 /lnet/image ext2 errors=continue,noacl,noatime,nouser_xattr,ro /dev/sda1 8:1
/lnet/image/LneTXFCE64/00filesystem.squashfs /lnet/00filesystem.squashfs squashfs noatime,ro,loop=/dev/loop0 /dev/loop0 7:0
/lnet/image/LneTXFCE64/10interfaces.squashfs /lnet/10interfaces.squashfs squashfs noatime,ro,loop=/dev/loop1 /dev/loop1 7:1
/dev/sda2 /lnet/cowroot ext4 data=ordered,relatime,rw /dev/sda2 8:2
overlay / overlay index=off,lowerdir=/lnet/00filesystem.squashfs:/lnet/10interfaces.squashfs,relatime,rw,upperdir=/lnet/cowroot/LneTXFCECOW/upper,workdir=/lnet/cowroot/LneTXFCECOW/work overlay 0:21
tmpfs /tmp tmpfs nodev,nosuid,relatime,rw,size=7861540k,mode=1777 tmpfs 0:22
tmpfs /var/log tmpfs mode=755,nosuid,relatime,rw,size=7861540k tmpfs 0:23
tmpfs /var/tmp tmpfs nodev,nosuid,relatime,rw,size=7861540k,mode=1777 tmpfs 0:24
securityfs /sys/kernel/security securityfs nodev,noexec,nosuid,relatime,rw securityfs 0:7
tmpfs /dev/shm tmpfs nodev,nosuid,rw,mode=1777 tmpfs 0:25
tmpfs /run/lock tmpfs nodev,noexec,nosuid,relatime,rw,size=5120k,mode=1777 tmpfs 0:26
tmpfs /sys/fs/cgroup tmpfs mode=755,nodev,noexec,nosuid,ro tmpfs 0:27
cgroup /sys/fs/cgroup/unified cgroup2 nodev,noexec,nosuid,relatime,rw cgroup 0:28
cgroup /sys/fs/cgroup/systemd cgroup name=systemd,nodev,noexec,nosuid,relatime,rw,xattr cgroup 0:29
pstore /sys/fs/pstore pstore nodev,noexec,nosuid,relatime,rw pstore 0:30
cgroup /sys/fs/cgroup/cpu cgroup cpu,nodev,noexec,nosuid,relatime,rw cgroup 0:31
systemd-1 /proc/sys/fs/binfmt_misc autofs direct,fd=32,maxproto=5,minproto=5,pgrp=1,relatime,rw,timeout=0 systemd-1 0:32
/lnet/cowroot/LneTXFCEhome /home none rw,bind /dev/sda2 8:2
/lnet/image/LneTXFCE64 /boot none ro,bind /dev/sda1 8:1
debugfs /sys/kernel/debug debugfs relatime,rw debugfs 0:8
mqueue /dev/mqueue mqueue relatime,rw mqueue 0:16
hugetlbfs /dev/hugepages hugetlbfs pagesize=2M,relatime,rw hugetlbfs 0:33
/lnet/image/grub /boot/grub none ro,bind /dev/sda1 8:1
/lnet/image/grub /lnet/image/LneTXFCE64/grub none ro,bind /dev/sda1 8:1
/lnet/cowroot/JPLive /home/JPLive none rw,bind /dev/sda2 8:2
/lnet/cowroot/JPLive /lnet/cowroot/LneTXFCEhome/JPLive none rw,bind /dev/sda2 8:2
/lnet/cowroot/JPLive/apt-cache-amd64 /var/cache/apt none rw,bind /dev/sda2 8:2
/lnet/cowroot/JPLive/apt-lib-amd64 /var/lib/apt none rw,bind /dev/sda2 8:2
/lnet/cowroot/LneTXFCEhome/root /root none rw,bind /dev/sda2 8:2
/lnet/cowroot/JPLive/var-spool /var/spool none rw,bind /dev/sda2 8:2
tmpfs /run/user/1001 tmpfs gid=100,mode=700,nodev,nosuid,relatime,rw,size=786152k,uid=1001 tmpfs 0:37
/home/JPLive/LneT-Lite-686/iso/LneT-Lite/00filesystem.squashfs /tmp/live-net-remaster-Fg9o5x/image/00filesystem.squashfs squashfs relatime,ro,loop=/dev/loop2 /dev/loop2 7:2
overlay /tmp/live-net-remaster-Fg9o5x/chroot overlay index=off,lowerdir=/tmp/live-net-remaster-Fg9o5x/image/00filesystem.squashfs,relatime,rw,upperdir=/home/tmp.uqIFpoBStR/upper,workdir=/home/tmp.uqIFpoBStR/work overlay 0:39
/sys/ /tmp/live-net-remaster-Fg9o5x/chroot/sys none rw,bind sysfs 0:17
/tmp/ /tmp/live-net-remaster-Fg9o5x/chroot/tmp none rw,bind tmpfs 0:22
/dev/ /tmp/live-net-remaster-Fg9o5x/chroot/dev none rw,bind udev 0:6
/dev/pts/ /tmp/live-net-remaster-Fg9o5x/chroot/dev/pts none rw,bind devpts 0:18
/dev/pts/ /dev/pts none rw,bind devpts 0:18
/sys/ /tmp/live-net-remaster-Fg9o5x/chroot/sys none rw,bind sysfs 0:17
/sys/ /sys none rw,bind sysfs 0:17
/tmp/ /tmp/live-net-remaster-Fg9o5x/chroot/tmp none rw,bind tmpfs 0:22
/tmp/ /tmp none rw,bind tmpfs 0:22
+lnet-remaster:364:_chroot_mount: '[' -z 'mkdir -p ${BASE_CHROOT}/home/JPLive; mount -o bind /home/JPLive ${BASE_CHROOT}/home/JPLive' ']' +lnet-remaster:365:_chroot_mount: eval mkdir -p '${BASE_CHROOT}/home/JPLive;' mount -o bind /home/JPLive '${BASE_CHROOT}/home/JPLive' ++lnet-remaster:365:_chroot_mount: mkdir -p /tmp/live-net-remaster-Fg9o5x/chroot/home/JPLive ++lnet-remaster:365:_chroot_mount: mount -o bind /home/JPLive /tmp/live-net-remaster-Fg9o5x/chroot/home/JPLive +lnet-remaster:366:_chroot_mount: ls -lA /tmp/live-net-remaster-Fg9o5x/chroot
total 0
drwxr-xr-x 3 root root 60 set 12 11:07 home
+lnet-remaster:368:_chroot_mount: export DISPLAY=:0.0
+lnet-remaster:368:_chroot_mount: DISPLAY=:0.0
+lnet-remaster:369:_chroot_mount: export HOME=/root
+lnet-remaster:369:_chroot_mount: HOME=/root
+lnet-remaster:370:_chroot_mount: export LC_ALL=C
+lnet-remaster:370:_chroot_mount: LC_ALL=C
+lnet-remaster:372:_chroot_mount: '[' '!' -L /tmp/live-net-remaster-Fg9o5x/chroot/etc/mtab ']' +lnet-remaster:374:_chroot_mount: rm -f /tmp/live-net-remaster-Fg9o5x/chroot/etc/mtab +lnet-remaster:375:_chroot_mount: ln -fs /proc/mounts /tmp/live-net-remaster-Fg9o5x/chroot/etc/mtab +lnet-remaster:375:_chroot_mount: :
+lnet-remaster:377:_chroot_mount: cp /etc/hosts /tmp/live-net-remaster-Fg9o5x/chroot/etc/ +lnet-remaster:378:_chroot_mount: ls -lA /tmp/live-net-remaster-Fg9o5x/chroot
total 0
drwxr-xr-x 3 root root 60 Sep 12 11:07 home
+lnet-remaster:380:_chroot_mount: chroot /tmp/live-net-remaster-Fg9o5x/chroot/ mount -t proc none /proc +lnet-remaster:381:_chroot_mount: ls -lA /tmp/live-net-remaster-Fg9o5x/chroot
total 0
drwxr-xr-x 3 root root 60 Sep 12 11:07 home
+lnet-remaster:382:_chroot_mount: :
+lnet-remaster:736:_prepare_web_database: _chroot_mount_compress
+lnet-remaster:395:_chroot_mount_compress: mkdir -p /tmp/live-net-remaster-Fg9o5x/chroot/var/tmp/mnt/ +lnet-remaster:396:_chroot_mount_compress: mount -o bind /home/JPLive/LneT-Lite-686 /tmp/live-net-remaster-Fg9o5x/chroot/var/tmp/mnt/ +lnet-remaster:397:_chroot_mount_compress: ls -lA /tmp/live-net-remaster-Fg9o5x/chroot
total 0
drwxr-xr-x 3 root root 60 Sep 12 11:07 home
drwxr-xr-x 3 root root 60 Sep 12 11:07 var
+lnet-remaster:398:_chroot_mount_compress: :
+lnet-remaster:737:_prepare_web_database: chroot /tmp/live-net-remaster-Fg9o5x/chroot/ sh +lnet-remaster:857:_prepare_web_database: echo 'Error: when preparing web database.' +lnet-remaster:858:_prepare_web_database: return 1
+lnet-remaster:1505: exit 1

author
#2 lore raw
Quoted 1 line · Amir Goldstein

So is this reproducible at every run with v4.13?

yes,

Quoted 1 line

Are you able to try this without overlayfs? i.e. chroot to squashfs mount?

I have found the same in 4.12 when mounting only one squashfs image. Therefore we could say that when working with previous versions overlayfs was solving the problem in some way.

Quoted 2 lines

I am guessing there is nothing important in upper layer when this error occurs, Am I right? does script need write to chroot path before this error occurs?

Correct, there is no need to write or enter in the chroot, only repeat the mount command.

Thanks,

Jordi Pujol

# uname -a
Linux pcjordi 4.12.11-1-haswell-lnet-amd64 #1 SMP PREEMPT Thu Sep 7 12:27:02 CEST 2017 x86_64 GNU/Linux
root@pcjordi:~# cd /tmp/
root@pcjordi:tmp# mkdir fs
root@pcjordi:tmp# mount -o loop,ro /lnet/image/LneTLXQT64/00filesystem.squashfs /tmp/fs/
root@pcjordi:tmp# mount -o bind /tmp /tmp/fs/tmp/
root@pcjordi:tmp# ls -lA /tmp/fs/
total 0
drwxr-xr-x  2 root root 1925 Sep  5 11:00 bin
drwxr-xr-x  2 root root  196 Sep 10 09:59 boot
drwxr-xr-x  2 root root    3 Sep 10 09:22 dev
drwxr-xr-x 97 root root 2867 Sep 10 09:58 etc
drwxr-xr-x  2 root root    3 Sep 10 09:24 home
lrwxrwxrwx  1 root root   45 Sep  7 13:57 initrd.img -> /boot/initrd.img-4.12.11-1-haswell-lnet-amd64
drwxr-xr-x 12 root root  290 Jul  5 11:54 lib
drwxr-xr-x  2 root root   43 Aug 31 09:55 lib64
drwxr-xr-x  2 root root    3 Feb  6  2017 media
drwxr-xr-x  2 root root    3 Feb  6  2017 mnt
drwxr-xr-x  2 root root    3 Feb  6  2017 opt
dr-xr-xr-x  2 root root    3 Sep 10 09:22 proc
drwx------  2 root root    3 Sep 10 09:24 root
drwxr-xr-x  2 root root    3 Sep 10 09:24 run
drwxr-xr-x  2 root root 2085 Sep  5 11:00 sbin
drwxr-xr-x  2 root root    3 Feb  6  2017 srv
dr-xr-xr-x  2 root root    3 Sep 10 09:22 sys
drwxrwxrwt 11 root root  260 Sep 12 14:42 tmp
drwxr-xr-x 10 root root  162 Feb  6  2017 usr
drwxr-xr-x 11 root root  184 Feb  6  2017 var
lrwxrwxrwx  1 root root   41 Sep  7 13:57 vmlinuz -> boot/vmlinuz-4.12.11-1-haswell-lnet-amd64
root@pcjordi:tmp# mount -o bind /tmp /tmp/fs/tmp/
root@pcjordi:tmp# ls -lA /tmp/fs/
total 0
root@pcjordi:tmp# mount-list 
sysfs	/sys	sysfs	nodev,noexec,nosuid,relatime,rw	sysfs	0:17
proc	/proc	proc	nodev,noexec,nosuid,relatime,rw	proc	0:5
udev	/dev	devtmpfs	mode=755,nosuid,nr_inodes=978778,relatime,rw,size=3915112k	udev	0:6
devpts	/dev/pts	devpts	gid=5,mode=620,noexec,nosuid,ptmxmode=000,relatime,rw	devpts	0:18
tmpfs	/run	tmpfs	mode=755,noexec,nosuid,relatime,rw,size=786164k	tmpfs	0:19
tmpfs	/lnet	tmpfs	mode=755,relatime,rw,size=7861632k	tmpfs	0:20
/dev/sda1	/lnet/image	ext2	errors=continue,noacl,noatime,nouser_xattr,ro	/dev/sda1	8:1
/lnet/image/LneTXFCE64/00filesystem.squashfs	/lnet/00filesystem.squashfs	squashfs	noatime,ro,loop=/dev/loop0	/dev/loop0	7:0
/lnet/image/LneTXFCE64/10interfaces.squashfs	/lnet/10interfaces.squashfs	squashfs	noatime,ro,loop=/dev/loop1	/dev/loop1	7:1
/dev/sda2	/lnet/cowroot	ext4	data=ordered,relatime,rw	/dev/sda2	8:2
overlay	/	overlay	lowerdir=/lnet/00filesystem.squashfs:/lnet/10interfaces.squashfs,relatime,rw,upperdir=/lnet/cowroot/LneTXFCECOW/upper,workdir=/lnet/cowroot/LneTXFCECOW/work	overlay	0:21
tmpfs	/tmp	tmpfs	nodev,nosuid,relatime,rw,size=7861632k,mode=1777	tmpfs	0:22
tmpfs	/var/log	tmpfs	mode=755,nosuid,relatime,rw,size=7861632k	tmpfs	0:23
tmpfs	/var/tmp	tmpfs	nodev,nosuid,relatime,rw,size=7861632k,mode=1777	tmpfs	0:24
securityfs	/sys/kernel/security	securityfs	nodev,noexec,nosuid,relatime,rw	securityfs	0:7
tmpfs	/dev/shm	tmpfs	nodev,nosuid,rw,mode=1777	tmpfs	0:25
tmpfs	/run/lock	tmpfs	nodev,noexec,nosuid,relatime,rw,size=5120k,mode=1777	tmpfs	0:26
tmpfs	/sys/fs/cgroup	tmpfs	mode=755,nodev,noexec,nosuid,ro	tmpfs	0:27
cgroup	/sys/fs/cgroup/unified	cgroup2	nodev,noexec,nosuid,relatime,rw	cgroup	0:28
cgroup	/sys/fs/cgroup/systemd	cgroup	name=systemd,nodev,noexec,nosuid,relatime,rw,xattr	cgroup	0:29
pstore	/sys/fs/pstore	pstore	nodev,noexec,nosuid,relatime,rw	pstore	0:30
cgroup	/sys/fs/cgroup/cpu	cgroup	cpu,nodev,noexec,nosuid,relatime,rw	cgroup	0:31
systemd-1	/proc/sys/fs/binfmt_misc	autofs	direct,fd=33,maxproto=5,minproto=5,pgrp=1,relatime,rw,timeout=0	systemd-1	0:32
/lnet/cowroot/LneTXFCEhome	/home	none	rw,bind	/dev/sda2	8:2
/lnet/image/LneTXFCE64	/boot	none	ro,bind	/dev/sda1	8:1
mqueue	/dev/mqueue	mqueue	relatime,rw	mqueue	0:16
debugfs	/sys/kernel/debug	debugfs	relatime,rw	debugfs	0:8
hugetlbfs	/dev/hugepages	hugetlbfs	relatime,rw	hugetlbfs	0:33
/lnet/image/grub	/boot/grub	none	ro,bind	/dev/sda1	8:1
/lnet/image/grub	/lnet/image/LneTXFCE64/grub	none	ro,bind	/dev/sda1	8:1
/lnet/cowroot/JPLive	/home/JPLive	none	rw,bind	/dev/sda2	8:2
/lnet/cowroot/JPLive	/lnet/cowroot/LneTXFCEhome/JPLive	none	rw,bind	/dev/sda2	8:2
/lnet/cowroot/LneTXFCEhome/root	/root	none	rw,bind	/dev/sda2	8:2
/lnet/cowroot/JPLive/var-spool	/var/spool	none	rw,bind	/dev/sda2	8:2
/lnet/cowroot/JPLive/apt-cache-amd64	/var/cache/apt	none	rw,bind	/dev/sda2	8:2
/lnet/cowroot/JPLive/apt-lib-amd64	/var/lib/apt	none	rw,bind	/dev/sda2	8:2
tmpfs	/run/user/1001	tmpfs	gid=100,mode=700,nodev,nosuid,relatime,rw,size=786160k,uid=1001	tmpfs	0:37
/lnet/image/LneTLXQT64/00filesystem.squashfs	/tmp/fs	squashfs	relatime,ro,loop=/dev/loop2	/dev/loop2	7:2
/tmp/	/tmp/fs/tmp	none	rw,bind	tmpfs	0:22
/tmp/	/tmp/fs/tmp	none	rw,bind	tmpfs	0:22
/tmp/	/tmp	none	rw,bind	tmpfs	0:22
#3 lore raw
Quoted 9 lines · Jordi Pujol
Quoted 1 line · Amir Goldstein

So is this reproducible at every run with v4.13?

yes,

Quoted 1 line

Are you able to try this without overlayfs? i.e. chroot to squashfs mount?

I have found the same in 4.12 when mounting only one squashfs image. Therefore we could say that when working with previous versions overlayfs was solving the problem in some way.

Can you please post the contents of /proc/self/mountinfo?

Thanks,
Miklos

author
#4 lore raw

Here is kernel v4.13 and one squashfs file

Thanks,

Jordi Pujol

Quoted 7 lines · Miklos Szeredi
Quoted 6 lines · Jordi Pujol
Quoted 1 line · Amir Goldstein

So is this reproducible at every run with v4.13?

yes,

Quoted 1 line

Are you able to try this without overlayfs? i.e. chroot to squashfs mount?

Quoted 8 lines
Quoted 3 lines

I have found the same in 4.12 when mounting only one squashfs image. Therefore we could say that when working with previous versions overlayfs was solving the problem in some way.

Can you please post the contents of /proc/self/mountinfo?

Thanks,
Miklos

root@pcjordi:notes# cat /proc/self/mountinfo > mountinfo-4.13.2-previous,txt
root@pcjordi:notes# mkdir /tmp/fs
root@pcjordi:notes# mount -o loop,ro /lnet/image/LneTLXQT64/00filesystem.squashfs /tmp/fs/     
root@pcjordi:notes# mount -o bind /tmp /tmp/fs/tmp/
root@pcjordi:notes# cat /proc/self/mountinfo > mountinfo-4.13.2-mount1,txt
root@pcjordi:notes# mount -o bind /tmp /tmp/fs/tmp/
root@pcjordi:notes# ls -lA /tmp/fs/
total 0
root@pcjordi:notes# cat /proc/self/mountinfo > mountinfo-4.13.2-mount2,txt