INFO: task syz.6.565:10603 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.565       state:D stack:25464 pid:10603 tgid:10602 ppid:10210  task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x17b4/0x5680
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_write_slowpath+0x883/0x1080
 down_write+0x1bc/0x200
 super_lock+0x289/0x3d0
 user_get_super+0xc8/0x120
 __se_sys_quotactl+0x540/0x9e0
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f933059cdd9
RSP: 002b:00007f932e7f6028 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f9330815fa0 RCX: 00007f933059cdd9
RDX: 0000000000000000 RSI: 0000200000000000 RDI: ffffffff80000302
RBP: 00007f9330632d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9330816038 R14: 00007f9330815fa0 R15: 00007ffd4a759108
 </TASK>

Showing all locks held in the system:
2 locks held by kworker/0:1/10:
6 locks held by kworker/u8:1/13:
 #0: ffff8881012b5940 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0xa35/0x1860
 #1: ffffc90000127c40 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0xa70/0x1860
 #2: ffffffff8fdbfdc8 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xf4/0x800
 #3: ffff88810a9c4128 (&dev->mutex){....}-{4:4}, at: devlink_pernet_pre_exit+0x129/0x420
 #4: ffff8881612da258 (&devlink->lock_key#27){+.+.}-{4:4}, at: devlink_pernet_pre_exit+0x142/0x420
 #5: ffff8881be6c8af0 (&sb->s_type->i_mutex_key#9/2){+.+.}-{4:4}, at: __simple_recursive_removal+0x19a/0x520
1 lock held by khungtaskd/34:
 #0: ffffffff8e95cd60 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by kworker/u10:1/36:
 #0: ffff8881000ac940 ((wq_completion)events_unbound#2){+.+.}-{0:0}, at: process_scheduled_works+0xa35/0x1860
 #1: ffffc90000ac7c40 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_scheduled_works+0xa70/0x1860
3 locks held by kworker/u10:5/79:
2 locks held by getty/5438:
 #0: ffff88810b5dc0a0 (&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 kworker/u8:2/5481:
 #0: ffff888174f5a940 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0xa35/0x1860
 #1: ffff888121024588 (psi_seq){-.-.}-{0:0}, at: psi_task_switch+0x53/0x880
 #2: ffffffff8fdcea80 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_dad_work+0x11e/0x14c0
3 locks held by syz-executor/7395:
3 locks held by kworker/0:8/7718:
 #0: ffff88810006b140 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0xa35/0x1860
 #1: ffffc90003197c40 (
(work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_scheduled_works+0xa70/0x1860
 #2: ffff8881a11e4230 (&data->fib_lock){+.+.}-{4:4}, at: nsim_fib_event_work+0x202/0x3d0
1 lock held by syz.6.565/10603:
 #0: ffff8881a97f00d8 (&type->s_umount_key#62){++++}-{4:4}, at: super_lock+0x289/0x3d0
2 locks held by dhcpcd/11145:
 #0: ffff8881b28ff440 (&sb->s_type->i_mutex_key#13){+.+.}-{4:4}, at: sock_close+0x9b/0x240
 #1: ffffffff8e963068 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x38d/0x770
1 lock held by syz.7.685/11572:
 #0: ffff8881a97f00d8 (&type->s_umount_key#62){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
2 locks held by syz-executor/13645:
 #0: ffffffff8fe3dec8 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40
 #1: ffffffff8fdcea80 (rtnl_mutex){+.+.}-{4:4}, at: nl80211_pre_doit+0x5e/0x8a0
2 locks held by syz-executor/13789:
4 locks held by syz.3.989/13794:
1 lock held by dhcpcd-run-hook/13819:

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

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: 7395 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+0x16a/0xdd0
Code: 0f 8a fd 45 39 fe 0f 86 25 0c 00 00 4c 8b 74 24 10 4d 8d be 68 01 00 00 44 8d 6b 01 48 8b 44 24 20 48 83 c0 18 48 89 44 24 68 <81> c3 81 00 00 00 81 fb fa 03 00 00 be fa 03 00 00 0f 4c f3 44 89
RSP: 0018:ffffc9000792f6a0 EFLAGS: 00000206
RAX: 0000000000000018 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff8881715b9d80 RSI: 000000000000000e RDI: 0000000000038e00
RBP: ffffc9000792f7f0 R08: 0000000000000001 R09: 1ffff11023d6561d
R10: dffffc0000000000 R11: ffffed1023d6561e R12: dffffc0000000000
R13: 0000000000000001 R14: ffff88816f540000 R15: ffff88816f540168
FS:  00005555703c6500(0000) GS:ffff8882a9293000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3162421c CR3: 000000016ecc2000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 f2fs_update_inode_page+0x83/0x2e0
 f2fs_write_checkpoint+0xbee/0x26a0
 kill_f2fs_super+0x314/0x730
 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: 0033:0x7f3377b9e017
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:00007ffcbaf94e98 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f3377c32120 RCX: 00007f3377b9e017
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffcbaf94f50
RBP: 00007ffcbaf94f50 R08: 0000000000000010 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcbaf95fe0
R13: 00007f3377c32120 R14: 0000000000024dfb R15: 00007ffcbaf96020
 </TASK>
