Hi,
some of my boot tests in v4.19.y and v4.20.y currently generate tracebacks as announced in commit 7c528e457d53 ("of: overlay: add missing of_node_put() after add new node to changeset"). This commit has been applied to both stable releases. The following patch series fixes the problem.
v4.19.y:
a613b26a5013 of: Convert to using %pOFn instead of device_node.name 144552c78692 of: overlay: add tests to validate kfrees from overlay removal 5b2c2f5a0ea3 of: overlay: add missing of_node_get() in __of_attach_node_sysfs 6b4955ba7bc0 of: overlay: use prop add changeset entry for property in new nodes 8814dc46bd9e of: overlay: do not duplicate properties from overlay for new nodes
v4.20.y:
144552c78692 of: overlay: add tests to validate kfrees from overlay removal 5b2c2f5a0ea3 of: overlay: add missing of_node_get() in __of_attach_node_sysfs 6b4955ba7bc0 of: overlay: use prop add changeset entry for property in new nodes 8814dc46bd9e of: overlay: do not duplicate properties from overlay for new nodes
Not all of those patches fix bugs, but they are required for the series to apply cleanly.
Please consider applying the above patches to both releases.
Thanks, Guenter