r0 = syz_open_dev$tty1(0xc, 0x4, 0x1)
ioctl$TIOCSTI(r0, 0x5412, &(0x7f0000000040))
r1 = syz_open_procfs(0x0, &(0x7f0000000140)='uid_map\x00')
pread64(r1, &(0x7f0000000180)=""/4096, 0x1000, 0x3)
ioctl$TCFLSH(r1, 0x540b, 0x2)