r0 = syz_open_dev$tty20(0xc, 0x4, 0x0)
ioctl$TCSETAF(r0, 0x5408, &(0x7f0000000000)={0x0, 0x3, 0x0, 0x0, 0x0, "b4ad785ae98d162e"})
r1 = syz_open_dev$tty20(0xc, 0x4, 0x0)
writev(r1, &(0x7f00000014c0)=[{&(0x7f0000000000)='9', 0x1}], 0x1)