INFO: task syz-executor:13992 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:21672 pid:13992 tgid:13992 ppid:1      task_flags:0x400140 flags:0x00080003
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7e6/0x1350
 lmLogClose+0xb4/0x520
 jfs_umount+0x2ef/0x3c0
 jfs_put_super+0x8c/0x190
 generic_shutdown_super+0x135/0x2c0
 kill_block_super+0x44/0x90
 deactivate_locked_super+0xbc/0x130
 cleanup_mnt+0x425/0x4c0
 task_work_run+0x1d4/0x260
 exit_to_user_mode_loop+0xe9/0x130
 do_syscall_64+0x2bd/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f89923902f7
RSP: 002b:00007ffcf07ea3b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f8992411d7d RCX: 00007f89923902f7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffcf07ea470
RBP: 00007ffcf07ea470 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffcf07eb500
R13: 00007f8992411d7d R14: 0000000000057c62 R15: 00007ffcf07eb540
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8df3d2e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5638:
 #0: ffff888111c330a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900035762f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400
3 locks held by kworker/1:7/7570:
 #0: ffff888100075948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc9000546fba0 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
 #2: ffff888173519240 (&data->fib_lock){+.+.}-{4:4}, at: nsim_fib_event_work+0x1f7/0x3b0
2 locks held by syz-executor/13827:
 #0: ffff88811afbc0e0 (&type->s_umount_key#73){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
 #1: ffffffff8e37bdc8 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520
2 locks held by syz-executor/13992:
 #0: ffff8881ba6c40e0 (&type->s_umount_key#73){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
 #1: ffffffff8e37bdc8 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520
2 locks held by syz-executor/14375:
 #0: ffff88801a9860e0 (&type->s_umount_key#73){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
 #1: ffffffff8e37bdc8 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520
2 locks held by syz-executor/14497:
 #0: ffff8881a80680e0 (&type->s_umount_key#73){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
 #1: ffffffff8e37bdc8 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520
1 lock held by syz.6.1542/14805:
 #0: ffff88811afbc0e0 (&type->s_umount_key#73){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
2 locks held by syz-executor/14808:
 #0: ffff888037b8e0e0 (&type->s_umount_key#73){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
 #1: ffffffff8e37bdc8 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520
1 lock held by syz.7.1646/15539:
 #0: ffff88811afbc0e0 (&type->s_umount_key#73){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.2.1707/15841:
 #0: ffff8881ba6c40e0 (&type->s_umount_key#73){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.5.1726/15929:
 #0: ffff88801a9860e0 (&type->s_umount_key#73){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.0.1765/16076:
 #0: ffff8881a80680e0 (&type->s_umount_key#73){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
2 locks held by syz-executor/16096:
 #0: ffff88810b5980e0 (&type->s_umount_key#73){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
 #1: ffffffff8e37bdc8 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520
2 locks held by syz-executor/16155:
 #0: ffff88816a56a0e0 (&type->s_umount_key#73){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
 #1: ffffffff8e37bdc8 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520
2 locks held by syz-executor/16415:
 #0: ffff888113a680e0 (&type->s_umount_key#73){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
 #1: ffffffff8e37bdc8 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520
1 lock held by syz.7.1878/16694:
 #0: ffff88811afbc0e0 (&type->s_umount_key#73){++++}-{4:4}, at: super_lock+0x25c/0x3b0
1 lock held by syz.4.1893/16729:
 #0: ffff888037b8e0e0 (&type->s_umount_key#73){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.2.1894/16752:
 #0: ffff8881ba6c40e0 (&type->s_umount_key#73){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.2.1894/16754:
 #0: ffff8881ba6c40e0 (&type->s_umount_key#73){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.0.1916/16851:
 #0: ffff8881a80680e0 (&type->s_umount_key#73){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.5.1932/16900:
 #0: ffff88801a9860e0 (&type->s_umount_key#73){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
5 locks held by syz-executor/17037:
 #0: ffff8881aeeacdc8 (&hdev->req_lock){+.+.}-{4:4}, at: hci_unregister_dev+0x212/0x510
 #1: ffff8881aeeac0b8 (&hdev->lock){+.+.}-{4:4}, at: hci_dev_close_sync+0x66a/0x1330
 #2: ffffffff8f4353a8 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_conn_hash_flush+0xa1/0x230
 #3: ffff88801ab8c338 (&conn->lock#2){+.+.}-{4:4}, at: l2cap_conn_del+0x70/0x680
 #4: ffffffff8df42d78 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2f6/0x730
3 locks held by syz.9.1939/17063:
 #0: ffff8880466f4dc8 (&hdev->req_lock){+.+.}-{4:4}, at: hci_unregister_dev+0x212/0x510
 #1: ffff8880466f40b8 (&hdev->lock){+.+.}-{4:4}, at: hci_dev_close_sync+0x66a/0x1330
 #2: ffffffff8f4353a8 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_conn_hash_flush+0xa1/0x230

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 34 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) 
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+0x189/0x250
 nmi_cpu_backtrace+0x39e/0x3d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 watchdog+0xf60/0xfa0
 kthread+0x711/0x8a0
 ret_from_fork+0x4bc/0x870
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 5250 Comm: klogd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0033:0x7f2a7f86012e
Code: 33 ec ff ff 48 8b 05 91 9c 12 00 49 89 fe 64 48 8b 30 48 85 f6 0f 84 ac 00 00 00 48 8d 4b ef 48 c1 e9 04 48 39 0d ba a0 12 00 <0f> 86 97 00 00 00 4c 8b 0d bd 11 13 00 4c 8b 1d b6 a0 12 00 48 8d
RSP: 002b:00007ffdb8467ea0 EFLAGS: 00000212
RAX: ffffffffffffffb8 RBX: 0000000000000070 RCX: 0000000000000005
RDX: 0000000000000071 RSI: 000055a3182fb010 RDI: 00007f2a7f98aaa0
RBP: 000055a318303b10 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000004000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2a7fa4b212 R14: 00007f2a7f98aaa0 R15: 0000000000000000
FS:  00007f2a7f75b380 GS:  0000000000000000
