In the Linux kernel, the following vulnerability has been resolved:
net: macb: put the "mdio" child node reference on success
macb_mii_init() holds the reference returned by of_get_child_by_name()
for macb_mdiobus_register() and drops it only on the error paths, so
every successful probe leaks a node reference. On a CM5, overlay
removal after four bind cycles reports
OF: ERROR: memory leak, expected refcount 1 instead of 5
Drop the reference after registration, where __mdiobus_register() has
already taken its own for the lifetime of the bus.
References 3
https://git.kernel.org/stable/c/382a373d9ea7a6ac4de9c022385b6217f65ae3cc
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/5fba30080d298edb742396073372385c961578d3
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/7d60dc7ff85b73a2119d582ca2d4456b30960380
416baaa9-dc9f-4396-8d5f-8c081fb06d67