pipe(&(0x7f00000003c0)={0xffffffffffffffff, <r0=>0xffffffffffffffff})
r1 = openat$ptmx(0xffffffffffffff9c, &(0x7f00000000c0), 0x0, 0x0)
splice(r1, 0x0, r0, 0x0, 0x100000000, 0x0)