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The flow of creating a new child goes through ipoib_vlan_add which allocates a new interface and checks the rtnl_lock. If the lock is taken, restart_syscall will be called to restart the system call again. In this case we are not releasing the already allocated interface, causing a leak. Fixes: 9baa0b036410 ("IB/ipoib: Add rtnl_link_ops support") Signed-off-by: Feras Daoud <ferasda@mellanox.com> Signed-off-by: Leon Romanovsky <leon@kernel.org> Signed-off-by: Doug Ledford <dledford@redhat.com>