r0 = syz_open_dev$tty20(0xc, 0x4, 0x0)
syz_open_dev$tty20(0xc, 0x4, 0x1)
ioctl$GIO_SCRNMAP(0xffffffffffffffff, 0x4b31, &(0x7f00000000c0)=""/30)
ioctl$TCXONC(r0, 0x5601, 0x0)