Hi, most likely this is not the right place to ask, please redirect me as needed. I'm trying to use OverlayFS to add (limited) write capability to a ReadOnly rootfs (SquashFS) Essentially (actual script is more complex, of course) boot-sequence includes: # /dev/mmcblk0p5: ext4 (upper+work+nwwroot+newroot/oldroot) # /dev/mmcblk0p6: SquashFS mounted on / mount /dev/mmcblk0p5 /overlay mount -t overlay overlay -o lowerdir=/,upperdir=/overlay/upper,workdir=/overlay/work /overlay/newroot cd /overlay/newroot pivot_root . oldroot mount --move oldroot/dev /dev mount --move oldroot/proc /proc This works as expected, but, too often for comfort, some file (and sometime also directories) become unavailable due to error: overlayfs: invalid origin (ssh/sshd_config, ftype=8000, origin ftype=4000). File name changes, of course, but rest is fairly constant. This always happens when some file is written. Error persists reboots. Only way I found to "cure" the system is to go on "upper" and delete the file thus going back to "lower" version (in this case I should delete "/oldroot/overlay/upper/etc/ssh/sshd_config") This is a self-built kernel (Linux vocore 5.7.0 #2 PREEMPT Mon Aug 3 09:19:06 CEST 2020 mips GNU/Linux) on a custom target based on a SoC (MT7628). I am available to do any required test, but I have no idea about where to start. Any hint (or redirect) would be greatly appreciated. Many Thanks in Advance Mauro
