mmap(&(0x7f0000000000/0x2000)=nil, 0x2000, 0x0, 0x40032, 0xffffffffffffffff, 0x0)
r0 = socket$nl_generic(0x10, 0x3, 0x10)
sendto(r0, 0x0, 0x0, 0x0, &(0x7f0000000000)=@isdn, 0x80)