r0 = socket$nl_sock_diag(0x10, 0x3, 0x4)
ioctl$sock_SIOCGIFCONF(r0, 0x8912, &(0x7f0000000100)=@req={0x28, &(0x7f00000000c0)={'syz_tun\x00', @ifru_mtu}})