In the Linux kernel, the following vulnerability has been resolved:
net: macb: destroy the phylink instance on the probe error path
macb_mii_init() creates a phylink instance on both of its success paths,
but the probe unwind frees the netdev without destroying it, so a failing
macb_alloc_tieoff() or register_netdev() leaks the instance.
Destroy it at err_out_unregister_mdio, which is only reachable once
macb_mii_init() has succeeded, so bp->phylink is valid there.
References 6
https://git.kernel.org/stable/c/23b6a44ffea1c54a4232aa86ee470b21422a8cc5
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/7d059f390750152b9bd69df934198651b94fc26d
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/8558e3195664113c14a4d8fcf221b3caff41fed1
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/e92a45b872b035c79acde8dd0da096a72b61ff2f
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/0112aa02c7847314be599d68783d50c7e228a694
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/c1de1e7b51ab2531f564b39b51998c3d71caccd7
416baaa9-dc9f-4396-8d5f-8c081fb06d67