CVE-2024-35879

In the Linux kernel, the following vulnerability has been resolved: of:
dynamic: Synchronize of_changeset_destroy() with the devlink removals In
the following sequence: 1) of_platform_depopulate() 2) of_overlay_remove()
During the step 1, devices are destroyed and devlinks are removed. During
the step 2, OF nodes are destroyed but __of_changeset_entry_destroy() can
raise warnings related to missing of_node_put(): ERROR: memory leak,
expected refcount 1 instead of 2 … Indeed, during the devlink removals
performed at step 1, the removal itself releasing the device (and the
attached of_node) is done by a job queued in a workqueue and so, it is done
asynchronously with respect to function calls. When the warning is present,
of_node_put() will be called but wrongly too late from the workqueue job.
In order to be sure that any ongoing devlink removals are done before the
of_node destruction, synchronize the of_changeset_destroy() with the
devlink removals.