r0 = syz_open_dev$tty20(0xc, 0x4, 0x0)
ioctl$TIOCSTI(r0, 0x5412, &(0x7f0000000080))
ioctl$TIOCSTI(r0, 0x5412, &(0x7f0000000280)=0x4)
ioctl$FIONREAD(r0, 0x541b, &(0x7f0000000380))