r0 = syz_open_dev$tty20(0xc, 0x4, 0x0) pipe2(&(0x7f0000000000)={0xffffffffffffffff, 0xffffffffffffffff}, 0x0) ppoll(&(0x7f0000000040)=[{r1}, {r0}, {r0}, {r0}, {r0}, {r0}], 0x6, 0x0, 0x0, 0x0)