openat$ttyS3(0xffffffffffffff9c, 0x0, 0x0, 0x0)
r0 = openat$ttyS3(0xffffffffffffff9c, &(0x7f00000000c0), 0x0, 0x0)
socketpair$nbd(0x1, 0x1, 0x0, &(0x7f0000000040)={<r1=>0xffffffffffffffff})
dup3(r1, r0, 0x80000)