INFO: task syz.3.1396:16083 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.1396      state:D stack:24696 pid:16083 tgid:16082 ppid:15849  task_flags:0x400140 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: 0033:0x7f7ed439c819
RSP: 002b:00007f7ed532e028 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f7ed4615fa0 RCX: 00007f7ed439c819
RDX: 0000000000000000 RSI: 00002000000003c0 RDI: ffffffff80000801
RBP: 00007f7ed4432c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000200000000280 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7ed4616038 R14: 00007f7ed4615fa0 R15: 00007ffc6452ce28
 </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/5652:
 #0: ffff8881110410a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900034732e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13a0
3 locks held by kworker/0:6/8275:
6 locks held by kworker/u8:4/8711:
 #0: ffff88823c63aea0 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x31/0x150
 #1: ffff88823c624588 (psi_seq){-.-.}-{0:0}, at: psi_task_switch+0x53/0x880
 #2: ffffffff8fde3e00 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_dad_work+0x11e/0x14c0
 #3: ffffffff8e95cce0 (rcu_read_lock){....}-{1:3}, at: __fib6_clean_all+0xbd/0x5a0
 #4: ffff88811316c430 (&tb->tb6_lock){+...}-{3:3}, at: __fib6_clean_all+0x217/0x5a0
 #5: ffff8881ba715cb8 (&net->ipv6.fib6_walker_lock){++..}-{3:3}, at: __fib6_clean_all+0x386/0x5a0
3 locks held by syz-executor/9842:
1 lock held by syz.3.1396/16083:
 #0: ffff8881172d80d8 (&type->s_umount_key#65){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.3.1762/19165:
 #0: ffff8881172d80d8 (&type->s_umount_key#65){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz-executor/19583:
 #0: ffffffff8e962fe8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2d0/0x770
1 lock held by dhcpcd-run-hook/19783:

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

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: 9842 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:xas_load+0x19a/0x5b0
Code: c6 28 4c 89 f0 48 c1 e8 03 4c 89 eb 42 80 3c 28 00 74 08 4c 89 f7 e8 95 ce 7a f6 4d 8b 36 e8 fd 6c 02 00 41 89 c5 31 ff 89 c6 <e8> 91 97 0f f6 45 85 ed 74 2c 49 83 c4 18 4c 89 e7 be ff ff ff ff
RSP: 0018:ffffc90003f37490 EFLAGS: 00000246
RAX: 0000000000000001 RBX: dffffc0000000000 RCX: ffff88810982d880
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90003f37578 R08: ffffffff8202e80d R09: ffffffff8e95cce0
R10: ffffc90003f37580 R11: fffff520007e6eb3 R12: ffff88811837f5e8
R13: 0000000000000001 R14: ffffea00043602c0 R15: 000000000000000e
FS:  000055558bb73500(0000) GS:ffff8882a9215000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055a27ce2ba18 CR3: 000000011742e000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 filemap_get_entry+0x181/0x3f0
 __filemap_get_folio_mpol+0x6d/0xb00
 __get_node_folio+0x20e/0xdd0
 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: 0033:0x7fc9f0f9da57
Code: a2 c7 05 9c fc 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:00007ffd87521bc8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fc9f1032048 RCX: 00007fc9f0f9da57
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd87521c80
RBP: 00007ffd87521c80 R08: 00007ffd87522c80 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd87522d10
R13: 00007fc9f1032048 R14: 00000000000507e3 R15: 00007ffd87522d50
 </TASK>
