INFO: task syz.6.2235:17272 blocked for more than 143 seconds.
      Tainted: G             L      syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.2235      state:D stack:24424 pid:17272 tgid:17270 ppid:16820  task_flags:0x400140 flags:0x00080006
Call Trace:
 <TASK>
 __schedule+0x17d9/0x56c0
 schedule+0x164/0x2b0
 schedule_timeout+0xc0/0x2c0
 __down_common+0x3b7/0x850
 down+0x80/0xd0
 console_lock+0x58/0x90
 set_selection_kernel+0x3c/0x17c0
 set_selection_user+0xf8/0x150
 vt_ioctl+0x83b/0x20d0
 tty_ioctl+0x920/0xdd0
 __se_sys_ioctl+0xfc/0x170
 do_syscall_64+0x174/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fef8e59e0d9
RSP: 002b:00007fef8f4e2028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fef8e825fa0 RCX: 00007fef8e59e0d9
RDX: 0000200000001900 RSI: 000000000000541c RDI: 000000000000000f
RBP: 00007fef8e635024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fef8e826038 R14: 00007fef8e825fa0 R15: 00007ffd4c4d6358
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/36:
 #0: ffffffff8eb59c20 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
4 locks held by kworker/0:2/1285:
 #0: ffff88810006b140 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0
 #1: ffffc9000726fc40 ((work_completion)(&helper->damage_work)){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0
 #2: ffffc9000726f790 (crtc_ww_class_acquire){+.+.}-{0:0}, at: drm_atomic_helper_dirtyfb+0x106/0xfd0
 #3: ffffc9000726f7b8 (crtc_ww_class_mutex){+.+.}-{4:4}, at: drm_atomic_helper_dirtyfb+0x106/0xfd0
2 locks held by getty/5427:
 #0: ffff8881792430a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc9000346b2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45a/0x1360
5 locks held by kworker/0:8/8074:
 #0: ffff8881685b1140 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0
 #1: ffffc900041c7c40 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0
 #2: ffff88810945e1d8 (&dev->mutex){....}-{4:4}, at: hub_event+0x184/0x4d30
 #3: ffff8881095b3568 (&port_dev->status_lock){+.+.}-{4:4}, at: hub_event+0x20a1/0x4d30
 #4: ffff888109574a60 (hcd->address0_mutex){+.+.}-{4:4}, at: hub_event+0x20c9/0x4d30
6 locks held by syz.4.2087/16315:
3 locks held by kworker/u9:20/16952:
1 lock held by syz.6.2235/17272:
 #0: ffffffff8f45ede0 (vc_sel.lock){+.+.}-{4:4}, at: set_selection_kernel+0x37/0x17c0
4 locks held by syz.9.2299/17863:
 #0: ffff88811337d0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffff88811337d128 (&tty->atomic_write_lock){+.+.}-{4:4}, at: file_tty_write+0x1e4/0x9c0
 #2: ffff88811337d2c8 (&tty->termios_rwsem){++++}-{4:4}, at: n_tty_write+0x1f5/0x11e0
 #3: ffffc90004d8b370 (&ldata->output_lock){+.+.}-{4:4}, at: n_tty_write+0x66d/0x11e0
4 locks held by syz-executor/18591:
3 locks held by syz-executor/18660:

=============================================

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 36 Comm: khungtaskd Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150
 nmi_cpu_backtrace+0x274/0x2d0
 nmi_trigger_cpumask_backtrace+0x17a/0x380
 sys_info+0x135/0x170
 watchdog+0xfd7/0x1030
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
