INFO: task syz.4.456:7944 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.456       state:D stack:19592 pid:7944  tgid:7942  ppid:6707   task_flags:0x400140 flags:0x00004006
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 __closure_sync+0x163/0x220
 bch2_set_nr_journal_buckets_loop+0x1338/0x1710
 bch2_dev_journal_alloc+0x175/0x2c0
 bch2_fs_journal_alloc+0x46d/0x4e0
 __bch2_run_recovery_passes+0x3bd/0x1060
 bch2_run_recovery_passes+0x184/0x210
 bch2_fs_recovery+0x2690/0x3a50
 bch2_fs_start+0xaaf/0xda0
 bch2_fs_get_tree+0xb39/0x1520
 vfs_get_tree+0x92/0x2b0
 do_new_mount+0x2a2/0x9e0
 __se_sys_mount+0x317/0x410
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4ddb19034a
RSP: 002b:00007f4ddbff3e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f4ddbff3ef0 RCX: 00007f4ddb19034a
RDX: 00002000000058c0 RSI: 0000200000000000 RDI: 00007f4ddbff3eb0
RBP: 00002000000058c0 R08: 00007f4ddbff3ef0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000000000
R13: 00007f4ddbff3eb0 R14: 0000000000005921 R15: 0000200000000180
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8e13a0e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5682:
 #0: ffff8881061910a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900029062f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400
3 locks held by kworker/u11:2/5857:
 #0: ffff888039c45948 ((wq_completion)hci3){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc90003357bc0 ((work_completion)(&hdev->cmd_sync_work)
){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
 #2: ffff88803efc8dc0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x1d4/0x3a0
3 locks held by kworker/1:5/5917:
6 locks held by kworker/0:6/5919:
 #0: ffff888104d36148 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc9000364fbc0 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
 #2: ffff88810b15e198 (&dev->mutex){....}-{4:4}, at: hub_event+0x184/0x4a20
 #3: ffff8881365ca198 (&dev->mutex){....}-{4:4}, at: __device_attach+0x88/0x400
 #4: ffff888029582160 (&dev->mutex){....}-{4:4}, at: __device_attach+0x88/0x400
 #5: ffffffff8f48e8a8 (register_mutex#7){+.+.}-{4:4}, at: usb_audio_probe+0x390/0x1e10
3 locks held by vhost-11335/11349:

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

NMI backtrace for cpu 1
CPU: 1 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+0xf93/0xfe0
 kthread+0x711/0x8a0
 ret_from_fork+0x439/0x7d0
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 11349 Comm: vhost-11335 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: 0010:llist_reverse_order+0x34/0x80
Code: 53 49 89 fe e8 8d 40 f8 fc 4d 85 f6 74 42 45 31 e4 49 bf 00 00 00 00 00 fc ff df 4c 89 f3 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 <74> 08 48 89 df e8 02 b3 5b fd 4c 8b 33 4c 89 23 4d 85 f6 74 0a e8
RSP: 0018:ffffc900043afce0 EFLAGS: 00000246
RAX: 1ffff110074709b8 RBX: ffff88803a384dc0 RCX: ffff88802113b980
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88803a384dc0
RBP: ffffffff88e6adbb R08: ffff88802ae904af R09: 1ffff110055d2095
R10: dffffc0000000000 R11: ffffed10055d2096 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff88803a384dc0 R15: dffffc0000000000
FS:  00007f684e1c96c0(0000) GS:ffff8880b8615000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000002 CR3: 000000003dd9e000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 vhost_run_work_list+0xa6/0x1e0
 vhost_task_fn+0x281/0x430
 ret_from_fork+0x439/0x7d0
 ret_from_fork_asm+0x1a/0x30
 </TASK>
