vlan: fix memory leak in vlan_newlink()

vlan: fix memory leak in vlan_newlink()

This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven.
This ID is fixed in Linux Kernel version v5.18.13 by commit 4c43069bb1097dd6cc1cf0f7c43a36d1f7b3910b, it was introduced in version v5.17 by commit 37aa50c539bcbcc01767e515bd170787fcfc0f33. For more details please see the references link.