Andrew absolutely right, problem introduced by commit https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/bionic/commit/?h=hwe&id=5613773b6f576de155c39a7b7a04e45f9f6eaf46
I will try to dive into overlayfs internals and find solution.
Andrew absolutely right, problem introduced by commit https:/ /git.launchpad. net/~ubuntu- kernel/ ubuntu/ +source/ linux/+ git/bionic/ commit/ ?h=hwe& id=5613773b6f57 6de155c39a7b7a0 4e45f9f6eaf46
I will try to dive into overlayfs internals and find solution.