INFO: task syz-executor.3:6045 blocked for more than 143 seconds.
      Not tainted 6.3.0-rc6-syzkaller-g7920df21c1b7 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3  state:D stack:0     pid:6045  ppid:1      flags:0x0000000c
Call trace:
 __switch_to+0x320/0x754 arch/arm64/kernel/process.c:556
 context_switch kernel/sched/core.c:5307 [inline]
 __schedule+0x1048/0x1e38 kernel/sched/core.c:6625
 schedule+0xc4/0x170 kernel/sched/core.c:6701
 schedule_timeout+0xb8/0x348 kernel/time/timer.c:2143
 do_wait_for_common+0x30c/0x468 kernel/sched/completion.c:85
 __wait_for_common kernel/sched/completion.c:106 [inline]
 wait_for_common kernel/sched/completion.c:117 [inline]
 wait_for_completion+0x48/0x60 kernel/sched/completion.c:138
 __flush_work+0x12c/0x1c0 kernel/workqueue.c:3174
 __cancel_work_timer+0x3e4/0x540 kernel/workqueue.c:3261
 cancel_work_sync+0x24/0x38 kernel/workqueue.c:3297
 hci_cmd_sync_clear+0x3c/0x1f8 net/bluetooth/hci_sync.c:643
 hci_unregister_dev+0x13c/0x454 net/bluetooth/hci_core.c:2696
 vhci_release+0x7c/0xcc drivers/bluetooth/hci_vhci.c:568
 __fput+0x30c/0x7bc fs/file_table.c:321
 ____fput+0x20/0x30 fs/file_table.c:349
 task_work_run+0x230/0x2e0 kernel/task_work.c:179
 exit_task_work include/linux/task_work.h:38 [inline]
 do_exit+0x63c/0x1f58 kernel/exit.c:869
 do_group_exit+0x194/0x22c kernel/exit.c:1019
 __do_sys_exit_group kernel/exit.c:1030 [inline]
 __se_sys_exit_group kernel/exit.c:1028 [inline]
 __wake_up_parent+0x0/0x60 kernel/exit.c:1028
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193
 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591

Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
 #0: ffff800015e4f0d0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x44/0xcf4 kernel/rcu/tasks.h:510
1 lock held by rcu_tasks_trace/13:
 #0: ffff800015e4f8d0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x44/0xcf4 kernel/rcu/tasks.h:510
1 lock held by khungtaskd/28:
 #0: ffff800015e4ef00 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:326
2 locks held by getty/5675:
 #0: ffff0000d9050098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
 #1: ffff80001aac02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1210 drivers/tty/n_tty.c:2177
3 locks held by kworker/u5:2/6036:
 #0: ffff0000d2947938 ((wq_completion)hci3){+.+.}-{0:0}, at: process_one_work+0x664/0x12d4 kernel/workqueue.c:2363
 #1: ffff80001e457c20 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work+0x6a8/0x12d4 kernel/workqueue.c:2365
 #2: ffff0000cfbcd028 (&hdev->req_lock){+.+.}-{3:3}, at: hci_cmd_sync_work+0x1a0/0x30c net/bluetooth/hci_sync.c:303
1 lock held by syz-executor.2/6043:
 #0: ffff0000c7afa0e0 (&type->s_umount_key#100){+.+.}-{3:3}, at: deactivate_super+0xd8/0x100 fs/super.c:361

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