INFO: task kworker/u8:1:13 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:1    state:D stack:23816 pid:13    tgid:13    ppid:2      task_flags:0x4208060 flags:0x00004000
Workqueue: btree_node_rewrite async_btree_node_rewrite_work
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 __closure_sync+0x163/0x220
 bch2_btree_update_start+0x18dc/0x1de0
 bch2_btree_node_rewrite+0x17e/0x1120
 bch2_btree_node_rewrite_key+0x273/0x320
 async_btree_node_rewrite_work+0x110/0x4f0
 process_scheduled_works+0xae1/0x17b0
 worker_thread+0x8a0/0xda0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
INFO: task syz.3.293:7397 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.293       state:D stack:19816 pid:7397  tgid:7396  ppid:6344   task_flags:0x400140 flags:0x00004006
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 __closure_sync+0x163/0x220
 bch2_btree_update_start+0x18dc/0x1de0
 bch2_btree_split_leaf+0x14b/0x8e0
 bch2_trans_commit_error+0x1b7/0x1130
 __bch2_trans_commit+0x1bb5/0x8870
 bch2_journal_replay+0x1e85/0x2630
 __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: 0033:0x7fc56079038a
RSP: 002b:00007fc5616ade68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fc5616adef0 RCX: 00007fc56079038a
RDX: 00002000000000c0 RSI: 0000200000000040 RDI: 00007fc5616adeb0
RBP: 00002000000000c0 R08: 00007fc5616adef0 R09: 0000000000808040
R10: 0000000000808040 R11: 0000000000000246 R12: 0000200000000040
R13: 00007fc5616adeb0 R14: 0000000000005920 R15: 0000200000002380
 </TASK>
INFO: task bch-reclaim/loo:7405 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:bch-reclaim/loo state:D stack:23600 pid:7405  tgid:7405  ppid:2      task_flags:0x200840 flags:0x00004000
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 __closure_sync+0x163/0x220
 bch2_btree_update_start+0x18dc/0x1de0
 bch2_btree_split_leaf+0x14b/0x8e0
 bch2_trans_commit_error+0x1b7/0x1130
 __bch2_trans_commit+0x1bb5/0x8870
 bch2_btree_write_buffer_flush_locked+0x451f/0x4dd0
 btree_write_buffer_flush_seq+0x18c7/0x1a40
 bch2_btree_write_buffer_journal_flush+0x69/0xb0
 journal_flush_pins+0x8e3/0xe90
 __bch2_journal_reclaim+0x910/0xed0
 bch2_journal_reclaim_thread+0x177/0x4f0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>

Showing all locks held in the system:
4 locks held by kworker/u8:1/13:
 #0: ffff888122bad148 ((wq_completion)btree_node_rewrite){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc90000107bc0 ((work_completion)(&a->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
 #2: ffff888113e04398 (&c->btree_trans_barrier){.+.+}-{0:0}, at: bch2_trans_srcu_lock+0xaf/0x220
 #3: ffff888113e26710 (&c->gc_lock){++++}-{4:4}, at: bch2_btree_update_start+0x542/0x1de0
1 lock held by khungtaskd/34:
 #0: ffffffff8e139f20 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
3 locks held by kworker/1:1/51:
 #0: ffff88801a480d48 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc9000079fbc0 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
 #2: ffff8880308d4240 (&data->fib_lock){+.+.}-{4:4}, at: nsim_fib_event_work+0x26b/0x3180
2 locks held by kworker/u10:3/1014:
 #0: ffff888105c51948 ((wq_completion)iou_exit){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc90006a77bc0 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
1 lock held by klogd/5285:
 #0: ffff888136639f98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140
2 locks held by getty/5675:
 #0: ffff88801f6c90a0 (&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
2 locks held by syz.3.293/7397:
 #0: ffff888113e04398 (&c->btree_trans_barrier){.+.+}-{0:0}, at: bch2_trans_srcu_lock+0xaf/0x220
 #1: ffff888113e26710 (&c->gc_lock){++++}-{4:4}, at: bch2_btree_update_start+0x542/0x1de0
4 locks held by bch-reclaim/loo/7405:
 #0: ffff888113e4af68 (&j->reclaim_lock){+.+.}-{4:4}, at: bch2_journal_reclaim_thread+0x16b/0x4f0
 #1: ffff888113e04398 (&c->btree_trans_barrier){.+.+}-{0:0}, at: __bch2_trans_get+0x7f4/0xd80
 #2: ffff888113e04740 (&wb->flushing.lock){+.+.}-{4:4}, at: btree_write_buffer_flush_seq+0x18bd/0x1a40
 #3: ffff888113e26710 (&c->gc_lock){++++}-{4:4}, at: bch2_btree_update_start+0x542/0x1de0

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

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+0xf93/0xfe0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 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: 24 Comm: kworker/1:0 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
Workqueue: wg-crypt-wg0 wg_packet_tx_worker
RIP: 0010:io_serial_out+0x7c/0xc0
Code: 72 70 fc 44 89 f9 d3 e5 49 83 c6 40 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 bc e0 d3 fc 41 03 2e 89 d8 89 ea ee <5b> 41 5c 41 5e 41 5f 5d e9 97 6f 2d 06 cc 44 89 f9 80 e1 07 38 c1
RSP: 0018:ffffc900001c6b90 EFLAGS: 00000002
RAX: 0000000000000020 RBX: 0000000000000020 RCX: 0000000000000000
RDX: 00000000000003f8 RSI: 0000000000000000 RDI: 0000000000000020
RBP: 00000000000003f8 R08: ffff888021040237 R09: 1ffff11004208046
R10: dffffc0000000000 R11: ffffffff854f3b00 R12: dffffc0000000000
R13: ffffffff99afd8d0 R14: ffffffff99df2420 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881a3c18000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055557840c5c8 CR3: 0000000100e9e000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 serial8250_console_write+0x1410/0x1ba0
 console_flush_all+0x728/0xc40
 console_unlock+0xc4/0x270
 vprintk_emit+0x5b7/0x7a0
 _printk+0xcf/0x120
 gred_dequeue+0x4a6/0x680
 __qdisc_run+0x23c/0x15f0
 __dev_queue_xmit+0x1056/0x3b50
 ip6_finish_output2+0x11bc/0x16a0
 udp_tunnel6_xmit_skb+0x640/0xad0
 send6+0x5ac/0x8d0
 wg_socket_send_skb_to_peer+0x111/0x1d0
 wg_packet_tx_worker+0x1c8/0x7c0
 process_scheduled_works+0xae1/0x17b0
 worker_thread+0x8a0/0xda0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
