INFO: task syz-executor.3:7057 blocked for more than 143 seconds.
      Not tainted 6.8.0-rc6-syzkaller-00021-gcf1182944c7c #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3  state:D stack:26264 pid:7057  tgid:7057  ppid:6868   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5400 [inline]
 __schedule+0x17d1/0x49f0 kernel/sched/core.c:6727
 __schedule_loop kernel/sched/core.c:6802 [inline]
 schedule+0x149/0x260 kernel/sched/core.c:6817
 schedule_timeout+0xb0/0x310 kernel/time/timer.c:2159
 do_wait_for_common kernel/sched/completion.c:95 [inline]
 __wait_for_common kernel/sched/completion.c:116 [inline]
 wait_for_common kernel/sched/completion.c:127 [inline]
 wait_for_completion+0x354/0x620 kernel/sched/completion.c:148
 do_exit+0xa27/0x2740 kernel/exit.c:870
 do_group_exit+0x206/0x2c0 kernel/exit.c:1020
 get_signal+0x176d/0x1850 kernel/signal.c:2893
 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop kernel/entry/common.c:105 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:201 [inline]
 syscall_exit_to_user_mode+0xc8/0x360 kernel/entry/common.c:212
 do_syscall_64+0x108/0x240 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7fb23a47cc9a
RSP: 002b:00007fb23a6cfb10 EFLAGS: 00000293
 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007fb23a47cc9a
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000032 R08: 0000001b2df60000 R09: 00007fb23a5abf8c
R10: 00007fb23a6cfc60 R11: 0000000000000293 R12: 00007fb23a0006f0
R13: ffffffffffffffff R14: 00007fb23a000000 R15: 00000000000a9a34
 </TASK>

Showing all locks held in the system:
3 locks held by kworker/1:1/27:
1 lock held by khungtaskd/29:
 #0: 
ffffffff8e130be0
 (
rcu_read_lock
){....}-{1:2}
, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
3 locks held by kworker/u4:9/2836:
2 locks held by getty/4827:
 #0: 
ffff88802f3a00a0
 (
&tty->ldisc_sem
){++++}-{0:0}
, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: 
ffffc90002f062f0
 (
&ldata->atomic_read_lock
){+.+.}-{3:3}
, at: n_tty_read+0x6b4/0x1e10 drivers/tty/n_tty.c:2201
3 locks held by kworker/0:5/5132:
3 locks held by kworker/1:5/5136:
 #0: 
ffff888014c78938
 (
(wq_completion)events
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:2608 [inline]
, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
 #1: 
ffffc900048e7d20
 (
(linkwatch_work).work
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:2608 [inline]
, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
 #2: 
ffffffff8f375bc8 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:281
3 locks held by kworker/0:0/7041:
3 locks held by kworker/1:0/7044:
2 locks held by kworker/1:6/7052:
 #0: 
ffff888014c7a538
 (
(wq_completion)rcu_gp
){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
 #1: 
ffffc900040dfd20
 (
(work_completion)(&rew->rew_work)
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:2608 [inline]
, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
3 locks held by kworker/1:7/7053:
4 locks held by syz-executor.3/7057:
 #0: 
ffff8880614e1060
 (
&hdev->req_lock
){+.+.}-{3:3}
, at: hci_dev_do_close net/bluetooth/hci_core.c:552 [inline]
, at: hci_unregister_dev+0x1db/0x4e0 net/bluetooth/hci_core.c:2739
 #1: 
ffff8880614e0078
 (
&hdev->lock
){+.+.}-{3:3}, at: hci_dev_close_sync+0x48b/0xff0 net/bluetooth/hci_sync.c:4941