INFO: task syz.9.831:11064 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.9.831       state:D stack:24960 pid:11064 tgid:11063 ppid:10922  task_flags:0x400040 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x15dd/0x52d0
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_read_slowpath+0x61e/0x920
 down_read+0x99/0x2e0
 super_lock+0x2d6/0x3d0
 user_get_super+0xc8/0x120
 __se_sys_quotactl+0x540/0x9e0
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f99f979c799
RSP: 002b:00007f99fa6dd028 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f99f9a15fa0 RCX: 00007f99f979c799
RDX: 0000000000000000 RSI: 0000200000000000 RDI: ffffffff80000801
RBP: 00007f99f9832c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000200000000280 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f99f9a16038 R14: 00007f99f9a15fa0 R15: 00007ffcffcd5128
 </TASK>

Showing all locks held in the system:
4 locks held by kworker/u9:1/31:
 #0: ffff8881000ac148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0xa52/0x18c0
 #1: ffffc90000a67c40 ((work_completion)(&(&kfence_timer)->work)){+.+.}-{0:0}, at: process_scheduled_works+0xa8d/0x18c0
 #2: ffff88812103ae60 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x31/0x150
 #3: ffffffff9a4ed598 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_object_activate+0x83/0x580
1 lock held by khungtaskd/35:
 #0: ffffffff8e75e5e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5633:
 #0: ffff88817597a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900034082f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13c0
2 locks held by syz-executor/7865:
2 locks held by syz-executor/8204:
2 locks held by syz-executor/8736:
4 locks held by syz-executor/8746:
2 locks held by syz-executor/9136:
3 locks held by syz-executor/9250:
3 locks held by syz-executor/9775:
1 lock held by syz.9.831/11064:
 #0: ffff888111a1e0e0 (&type->s_umount_key#61){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.0.1030/12150:
 #0: ffff8881ba31c0e0 (&type->s_umount_key#61){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.3.1060/12317:
 #0: ffff88816b5560e0 (&type->s_umount_key#61){++++}-{4:4}, at: super_lock+0x289/0x3d0
2 locks held by syz.5.1119/12600:
2 locks held by syz.2.1121/12605:

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 35 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+0xfd9/0x1030
 kthread+0x388/0x470
 ret_from_fork+0x51e/0xb90
 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: 8736 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:__lock_acquire+0xb17/0x2cf0
Code: 81 73 0e 48 c7 c6 ee 7c 01 8e 67 48 0f b9 3a 90 48 bb eb 83 b5 80 46 86 c8 61 48 0f af dd 48 c1 eb 2d 48 8b 04 dd 40 44 e0 93 <48> 85 c0 0f 94 c1 48 83 c0 f8 0f 94 c2 08 ca 0f 84 1c 01 00 00 e8
RSP: 0018:ffffc90006cc6fc0 EFLAGS: 00000003
RAX: ffffffff944cc7d8 RBX: 000000000000ddce RCX: 0000000000040000
RDX: 00000000a44bae1e RSI: 0000000006273e23 RDI: ffff88816b84d7c0
RBP: 9efaa6904835a4f1 R08: ffffffff8193eb31 R09: ffff88812103ae60
R10: dffffc0000000000 R11: fffffbfff20238d7 R12: ffff88816b84e390
R13: ffff88816b84e390 R14: ffff88816b84d7c0 R15: 0000000000000003
FS:  00005555731f8500(0000) GS:ffff88818de59000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f963b44eddd CR3: 00000001ba046000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 lock_acquire+0xf0/0x2e0
 _raw_spin_lock_nested+0x32/0x50
 raw_spin_rq_lock_nested+0x31/0x150
 __schedule+0x3d0/0x52d0
 preempt_schedule_irq+0x4d/0xa0
 irqentry_exit+0x599/0x620
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:lock_acquire+0x20b/0x2e0
Code: e9 30 ff ff ff e8 45 95 0d 0a f7 c3 00 02 00 00 0f 84 38 ff ff ff 65 48 8b 05 c1 e2 7a 11 48 3b 44 24 30 75 33 fb 48 83 c4 38 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 48 8d 3d fe 8c 73
RSP: 0018:ffffc90006cc7500 EFLAGS: 00000296
RAX: 84b6da0a8b6c6700 RBX: 0000000000000246 RCX: 0000000000000046
RDX: 00000000c3d4ff99 RSI: ffffffff8e16ad5a RDI: ffffffff8c27ce80
RBP: 0000000000000000 R08: ffffffff8200c5fa R09: ffffffff8e75e5e0
R10: ffffc90006cc7580 R11: fffff52000d98eb3 R12: 0000000000000002
R13: ffffffff8e75e5e0 R14: 0000000000000000 R15: 0000000000000000
 filemap_get_entry+0xe6/0x320
 __filemap_get_folio_mpol+0x6d/0xb00
 __get_node_folio+0x20f/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+0x32d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f682db9d9d7
Code: a2 c7 05 1c fd 24 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:00007ffdbf45cfb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f682dc32050 RCX: 00007f682db9d9d7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffdbf45d070
RBP: 00007ffdbf45d070 R08: 00007ffdbf45e070 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffdbf45e100
R13: 00007f682dc32050 R14: 000000000002a1a5 R15: 00007ffdbf45e140
 </TASK>
