r0 = syz_open_dev$tty20(0xc, 0x4, 0x0)
ioctl$TIOCSTI(r0, 0x5412, &(0x7f0000000140)=0x4)
readv(r0, &(0x7f00000004c0)=[{&(0x7f0000000040)=""/18, 0x12}], 0x1)