INFO: task bch-reclaim/loo:6021 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:22696 pid:6021  tgid:6021  ppid:2      task_flags:0x200040 flags:0x00004000
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7e6/0x1350
 bch2_journal_reclaim_thread+0x16b/0x4f0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
INFO: task syz.2.21:6082 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.21        state:D stack:24648 pid:6082  tgid:6081  ppid:5844   task_flags:0x400140 flags:0x00004004
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_read_slowpath+0x5fd/0x8f0
 down_read+0x98/0x2e0
 super_lock+0x2a9/0x3b0
 __iterate_supers+0x126/0x290
 __se_sys_quotactl+0x353/0x950
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbe0a58ebe9
RSP: 002b:00007fbe087f6038 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007fbe0a7c5fa0 RCX: 00007fbe0a58ebe9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000100
RBP: 00007fbe0a611e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbe0a7c6038 R14: 00007fbe0a7c5fa0 R15: 00007ffd5cc07548
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8e139f60 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5675:
 #0: ffff8881000f20a0 (&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
6 locks held by syz-executor/5845:
 #0: ffff88810715c0e0
 (&type->s_umount_key#57){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
 #1: ffff888126000278 (&c->state_lock){++++}-{4:4}, at: __bch2_fs_stop+0xf8/0x900
 #2: ffff88812604af68 (&j->reclaim_lock){+.+.}-{4:4}, at: journal_flush_done+0x86/0x810
 #3: ffff888126004398 (&c->btree_trans_barrier){.+.+}-{0:0}, at: __bch2_trans_get+0x7f4/0xd80
 #4: ffff888126004740 (&wb->flushing.lock){+.+.}-{4:4}, at: btree_write_buffer_flush_seq+0x18bd/0x1a40
 #5: ffff888126026710 (&c->gc_lock){++++}-{4:4}, at: bch2_btree_update_start+0x542/0x1de0
1 lock held by bch-reclaim/loo/6021:
 #0: ffff88812604af68 (&j->reclaim_lock){+.+.}-{4:4}, at: bch2_journal_reclaim_thread+0x16b/0x4f0
1 lock held by syz.2.21/6082:
 #0: ffff88810715c0e0 (&type->s_umount_key#57){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.4.54/6449:
 #0: ffff88810715c0e0 (&type->s_umount_key#57){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.7.135/7184:
 #0: ffff88810715c0e0 (&type->s_umount_key#57){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.1.201/7661:
 #0: ffff88810715c0e0 (&type->s_umount_key#57){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
2 locks held by syz-executor/8439:
 #0: ffff8881072ea0e0 (&type->s_umount_key#54){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
 #1: ffffffff8e13f8c0 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x570
3 locks held by syz.5.469/9228:

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

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+0x3fc/0x770
 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: 9228 Comm: syz.5.469 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:rcu_is_watching+0x0/0xb0
Code: c7 c7 e0 ed 13 8e e8 6f 15 59 03 eb cc 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 41 57 41 56 53 65 ff 05 80 1f fa 10 e8 6b a0 d3 09 89
RSP: 0018:ffffc90000007670 EFLAGS: 00000002
RAX: 0000000000000001 RBX: ffffffff822314ed RCX: ffff88810b865640
RDX: 0000000000000000 RSI: ffffffff8dba7c3a RDI: ffffffff8be33a00
RBP: dffffc0000000000 R08: 0000000000000000 R09: ffffffff8172c195
R10: ffffc90000007798 R11: ffffffff81ac3b90 R12: 1ffff92000000ee9
R13: ffffc90000007780 R14: ffffc90000007748 R15: ffffffff8172c195
FS:  00007ff5784be6c0(0000) GS:ffff8880b8618000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b34005ff8 CR3: 000000010f856000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 unwind_next_frame+0xd4/0x2390
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_stack+0x3e/0x60
 kasan_record_aux_stack+0xbd/0xd0
 insert_work+0x3d/0x330
 __queue_work+0xbaf/0xfb0
 call_timer_fn+0x17e/0x5f0
 __run_timer_base+0x646/0x860
 run_timer_softirq+0xb7/0x180
 handle_softirqs+0x286/0x870
 __irq_exit_rcu+0xca/0x1f0
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:vprintk_emit+0x58f/0x7a0
Code: 85 32 01 00 00 e8 01 88 1f 00 41 89 df 4d 85 f6 48 8b 1c 24 75 07 e8 f0 87 1f 00 eb 06 e8 e9 87 1f 00 fb 48 c7 c7 00 e2 12 8e <31> f6 ba 01 00 00 00 31 c9 41 b8 01 00 00 00 45 31 c9 53 e8 b9 35
RSP: 0018:ffffc90003f6e680 EFLAGS: 00000287
RAX: ffffffff81a02717 RBX: ffffffff81a025d4 RCX: 0000000000080000
RDX: ffffc900218e9000 RSI: 00000000000319e7 RDI: ffffffff8e12e200
RBP: ffffc90003f6e790 R08: ffffffff8fa39137 R09: 1ffffffff1f47226
R10: dffffc0000000000 R11: fffffbfff1f47227 R12: dffffc0000000000
R13: 1ffff920007edcd4 R14: 0000000000000200 R15: 0000000000000034
 _printk+0xcf/0x120
 f2fs_printk+0x464/0x500
 f2fs_write_end_io+0x886/0xb60
 __submit_merged_bio+0x27a/0x6a0
 __submit_merged_write_cond+0x255/0x530
 f2fs_write_data_pages+0x261d/0x3000
 do_writepages+0x32e/0x550
 filemap_fdatawrite+0x199/0x240
 f2fs_sync_dirty_inodes+0x31f/0x830
 f2fs_write_checkpoint+0x95a/0x1df0
 f2fs_issue_checkpoint+0x3ac/0x570
 f2fs_do_shutdown+0x111/0x5c0
 __f2fs_ioctl+0x41a8/0xb610
 __se_sys_ioctl+0xfc/0x170
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff57758ebe9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ff5784be038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007ff5777c5fa0 RCX: 00007ff57758ebe9
RDX: 0000200000000080 RSI: 000000008004587d RDI: 0000000000000008
RBP: 00007ff577611e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff5777c6038 R14: 00007ff5777c5fa0 R15: 00007ffe0f8e1a48
 </TASK>
