INFO: task syz.1.1676:18307 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.1676      state:D stack:24696 pid:18307 tgid:18306 ppid:17845  task_flags:0x400040 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x17b4/0x5680
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_read_slowpath+0x6d9/0x940
 down_read+0x99/0x2e0
 super_lock+0x2d6/0x3d0
 user_get_super+0xc8/0x120
 __se_sys_quotactl+0x540/0x9e0
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb76b39cdd9
RSP: 002b:00007fb76c2d2028 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007fb76b615fa0 RCX: 00007fb76b39cdd9
RDX: 0000000000000000 RSI: 0000200000000080 RDI: ffffffff80000901
RBP: 00007fb76b432d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb76b616038 R14: 00007fb76b615fa0 R15: 00007fff0a5d1f08
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8e95cce0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5642:
 #0: ffff8881700ae0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc9000346b2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13a0
3 locks held by syz-executor/13705:
2 locks held by syz-executor/14575:
1 lock held by syz.1.1676/18307:
 #0: ffff8881158120d8 (&type->s_umount_key#62){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
2 locks held by syz.2.1950/20828:
3 locks held by syz.1.1951/20836:

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

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+0xe8/0x150
 nmi_cpu_backtrace+0x274/0x2d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 sys_info+0x135/0x170
 watchdog+0xfd3/0x1030
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 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: 13705 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:__sanitizer_cov_trace_switch+0x13/0x130
Code: 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 48 8b 06 48 8b 4e 08 48 83 c1 f8 48 c1 c1 3d <48> 83 f9 02 7f 1e 48 85 c9 74 3c 48 83 f9 01 0f 85 f3 00 00 00 b9
RSP: 0018:ffffc900073df538 EFLAGS: 00000207
RAX: 0000000000000002 RBX: 1ffff92000e7beb0 RCX: 0000000000000003
RDX: ffff888106b28000 RSI: ffffffff8efef080 RDI: 00000000ffffffff
RBP: ffffc900073df690 R08: ffff888106b28000 R09: 0000000000000003
R10: 00000000ffffffff R11: 0000000000000000 R12: 00000000ffffffff
R13: ffffea0006e9e0a0 R14: dffffc0000000000 R15: 1ffffd4000dd3c11
FS:  0000555585899500(0000) GS:ffff8882a9225000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000563750a46131 CR3: 000000010ddb8000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 read_node_folio+0x2c4/0x410
 __get_node_folio+0x3cb/0xe90
 f2fs_update_inode_page+0x83/0x2e0
 f2fs_write_checkpoint+0xbee/0x26a0
 kill_f2fs_super+0x314/0x720
 deactivate_locked_super+0xbc/0x130
 cleanup_mnt+0x437/0x4d0
 task_work_run+0x1d9/0x270
 exit_to_user_mode_loop+0xed/0x480
 do_syscall_64+0x33e/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa38cf9e017
Code: a2 c7 05 dc 06 25 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 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 e8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007fff1efb4a38 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fa38d032120 RCX: 00007fa38cf9e017
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fff1efb4af0
RBP: 00007fff1efb4af0 R08: 00007fff1efb5af0 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff1efb5b80
R13: 00007fa38d032120 R14: 0000000000077daa R15: 00007fff1efb5bc0
 </TASK>
