r0 = socket$inet6_tcp(0xa, 0x1, 0x0)
mmap(&(0x7f0000000000/0x4000)=nil, 0x4000, 0x0, 0x13, r0, 0x0)
sendfile(0xffffffffffffffff, 0xffffffffffffffff, &(0x7f0000000080), 0x0)