pipe(&(0x7f0000000040)={0xffffffffffffffff, <r0=>0xffffffffffffffff})
r1 = openat$procfs(0xffffffffffffff9c, &(0x7f0000000000)='/proc/tty/drivers\x00', 0x0, 0x0)
splice(r1, 0x0, r0, 0x0, 0x1ff, 0x0)