unregister_netdevice: waiting for syzkaller1 to become free. Usage count = 2
ref_tracker: netdev@ffff8881be754700 has 1/1 users at
     netdev_get_by_index+0x79/0xb0
     fib6_nh_init+0x285/0x1e40
     ip6_route_info_create_nh+0x16a/0xad0
     addrconf_f6i_alloc+0x3b7/0x630
     ipv6_add_addr+0x59c/0x1110
     addrconf_add_linklocal+0x20c/0x460
     addrconf_addr_gen+0x2d7/0x360
     addrconf_notify+0xb1e/0x1050
     notifier_call_chain+0x1a5/0x3d0
     __dev_notify_flags+0x1aa/0x310
     netif_change_flags+0xde/0x1b0
     dev_change_flags+0x128/0x260
     devinet_ioctl+0x966/0x1c50
     inet_ioctl+0x42a/0x560
     sock_do_ioctl+0x101/0x320
     sock_ioctl+0x57a/0x7e0

