INFO: task syz-executor:6977 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:18536 pid:6977  tgid:6977  ppid:1      task_flags:0x400140 flags:0x00004006
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_timeout+0x9a/0x270
 wait_for_completion+0x2bf/0x5d0
 kthread_stop+0x194/0x5c0
 bch2_copygc_stop+0x4b/0x120
 __bch2_fs_read_only+0x47/0x5b0
 bch2_fs_read_only+0x42a/0xb00
 __bch2_fs_stop+0x100/0x900
 generic_shutdown_super+0x135/0x2c0
 bch2_kill_sb+0x41/0x50
 deactivate_locked_super+0xbc/0x130
 cleanup_mnt+0x425/0x4c0
 task_work_run+0x1d4/0x260
 exit_to_user_mode_loop+0xec/0x110
 do_syscall_64+0x2bd/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3a1bf8ff17
RSP: 002b:00007ffdfdb25b98 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f3a1c011c05 RCX: 00007f3a1bf8ff17
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffdfdb25c50
RBP: 00007ffdfdb25c50 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffdfdb26ce0
R13: 00007f3a1c011c05 R14: 000000000001a932 R15: 00007ffdfdb26d20
 </TASK>

Showing all locks held in the system:
3 locks held by kworker/u9:1/32:
1 lock held by khungtaskd/34:
 #0: ffffffff8e139f20 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5670:
 #0: ffff8880223760a0 (&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-executor/6542:
2 locks held by syz-executor/6977:
 #0: ffff888104c780e0 (&type->s_umount_key#69){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
 #1: ffff888037500278 (&c->state_lock){++++}-{4:4}, at: __bch2_fs_stop+0xf8/0x900
1 lock held by syz-executor/9214:
 #0: ffff88801bb5c0e0 (&type->s_umount_key#56){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
2 locks held by syz-executor/10189:
 #0: ffff88812584e0e0 (&type->s_umount_key#65){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
 #1: ffffffff8e13f880 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x570
1 lock held by syz.5.538/10625:
 #0: ffff88803af6c0e0 (&type->s_umount_key#65){++++}-{4:4}, at: super_lock+0x2a9/0x3b0

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

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: 6542 Comm: syz-executor 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:__get_node_folio+0xac/0x1410
Code: c7 44 2c 0c f3 f3 f3 f3 e8 21 21 b0 fd 31 ff 4c 89 fe e8 f7 25 b0 fd 4c 89 7c 24 30 4d 85 ff 0f 84 04 01 00 00 48 89 5c 24 10 <48> 81 c3 60 0f 00 00 48 89 d8 48 c1 e8 03 42 0f b6 04 28 84 c0 0f
RSP: 0018:ffffc9000380f7c0 EFLAGS: 00000202
RAX: ffffffff840f8cf9 RBX: ffff888036984000 RCX: ffff88810550d640
RDX: 0000000000000000 RSI: 000000000000000e RDI: 0000000000000000
RBP: ffffc9000380f910 R08: 0000000000000001 R09: 1ffff11022a751b3
R10: dffffc0000000000 R11: ffffed1022a751b4 R12: 1ffff92000701f08
R13: dffffc0000000000 R14: 0000000000000000 R15: 000000000000000e
FS:  0000555578516500(0000) GS:ffff8880b8618000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555565ef15c8 CR3: 000000010f746000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 f2fs_update_inode_page+0x82/0x190
 f2fs_write_checkpoint+0xb6e/0x1df0
 kill_f2fs_super+0x2c3/0x6c0
 deactivate_locked_super+0xbc/0x130
 cleanup_mnt+0x425/0x4c0
 task_work_run+0x1d4/0x260
 exit_to_user_mode_loop+0xec/0x110
 do_syscall_64+0x2bd/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe2b378ff17
Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffe7df37708 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fe2b3811c05 RCX: 00007fe2b378ff17
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffe7df377c0
RBP: 00007ffe7df377c0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffe7df38850
R13: 00007fe2b3811c05 R14: 0000000000015dad R15: 00007ffe7df38890
 </TASK>
