r0 = syz_open_dev$tty20(0xc, 0x4, 0x1)
ioctl$TIOCVHANGUP(r0, 0x5437, 0x0)
readv(r0, &(0x7f00000003c0)=[{&(0x7f0000000040)=""/237, 0xed}], 0x1)