Warning: Permanently added '10.128.1.92' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   26.898500] BUG: sleeping function called from invalid context at drivers/tty/vt/vt.c:2245
[   26.906984] in_atomic(): 1, irqs_disabled(): 1, pid: 7980, name: syz-executor189
[   26.914493] 3 locks held by syz-executor189/7980:
[   26.919308]  #0:  (&tty->ldisc_sem){++++}, at: [<ffffffff8355bdc2>] tty_ldisc_ref_wait+0x22/0x80
[   26.928221]  #1:  (&(&tty->flow_lock)->rlock){....}, at: [<ffffffff8355b340>] n_tty_ioctl_helper+0xa0/0x350
[   26.938199]  #2:  (&tty->ldisc_sem){++++}, at: [<ffffffff8355be7b>] tty_ldisc_ref+0x1b/0x80
[   26.946672] irq event stamp: 8080
[   26.950110] hardirqs last  enabled at (8079): [<ffffffff81004cbc>] do_syscall_64+0x4c/0x640
[   26.958575] hardirqs last disabled at (8080): [<ffffffff8724b6d5>] _raw_spin_lock_irq+0x35/0x80
[   26.967388] softirqs last  enabled at (5518): [<ffffffff8760068b>] __do_softirq+0x68b/0x9ff
[   26.975864] softirqs last disabled at (5491): [<ffffffff81322cf3>] irq_exit+0x193/0x240
[   26.983980] Preemption disabled at:
[   26.983985] [<          (null)>]           (null)
[   26.992408] CPU: 1 PID: 7980 Comm: syz-executor189 Not tainted 4.14.299-syzkaller #0
[   27.000260] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
[   27.009589] Call Trace:
[   27.012161]  dump_stack+0x1b2/0x281
[   27.015765]  ___might_sleep.cold+0x235/0x250
[   27.020150]  do_con_write+0xd0/0x19b0
[   27.023928]  ? resched_curr+0xc7/0x360
[   27.027791]  ? n_hdlc_buf_get+0x194/0x220
[   27.031913]  ? lock_acquire+0x170/0x3f0
[   27.035860]  ? lock_downgrade+0x740/0x740
[   27.039988]  ? do_con_trol+0x51e0/0x51e0
[   27.044040]  ? _raw_spin_unlock_irqrestore+0x66/0xe0
[   27.049119]  con_write+0x21/0xa0
[   27.052573]  ? con_put_char+0xa0/0xa0
[   27.056350]  n_hdlc_send_frames+0x241/0x410
[   27.060653]  n_hdlc_tty_wakeup+0x95/0xb0
[   27.064691]  ? n_hdlc_tty_open+0x4d0/0x4d0
[   27.068904]  tty_wakeup+0xc3/0xf0
[   27.072332]  ? insert_char+0x280/0x280
[   27.076191]  __start_tty+0x10b/0x140
[   27.079881]  n_tty_ioctl_helper+0x2f8/0x350
[   27.084181]  n_hdlc_tty_ioctl+0xd4/0x300
[   27.088221]  tty_ioctl+0x5af/0x1430
[   27.091834]  ? n_hdlc_tty_wakeup+0xb0/0xb0
[   27.096106]  ? tty_fasync+0x2c0/0x2c0
[   27.099884]  ? lock_acquire+0x170/0x3f0
[   27.103831]  ? lock_downgrade+0x740/0x740
[   27.107955]  ? _raw_spin_unlock_irqrestore+0x66/0xe0
[   27.113053]  ? debug_check_no_obj_freed+0x2c0/0x680
[   27.118048]  ? tty_fasync+0x2c0/0x2c0
[   27.121825]  do_vfs_ioctl+0x75a/0xff0
[   27.125624]  ? rcu_lockdep_current_cpu_online+0xed/0x140
[   27.131049]  ? ioctl_preallocate+0x1a0/0x1a0
[   27.135444]  ? kmem_cache_free+0x23a/0x2b0
[   27.139660]  ? putname+0xcd/0x110
[   27.143964]  ? do_sys_open+0x208/0x410
[   27.147831]  ? filp