INFO: task syz.3.2004:14874 blocked for more than 143 seconds.
      Tainted: G             L      syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.2004      state:D stack:24392 pid:14874 tgid:14873 ppid:10081  task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x17d9/0x56c0
 schedule+0x164/0x2b0
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_read_slowpath+0x6ba/0x920
 down_read+0x9c/0x330
 super_lock+0x2d6/0x3d0
 __iterate_supers+0x120/0x240
 __se_sys_quotactl+0x3a0/0x9a0
 do_syscall_64+0x174/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f80da39e0d9
RSP: 002b:00007f80db27c028 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f80da625fa0 RCX: 00007f80da39e0d9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000102
RBP: 00007f80da435024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f80da626038 R14: 00007f80da625fa0 R15: 00007ffdce8f3ab8
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8eb59c60 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5426:
 #0: ffff88810b5000a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900034762e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45a/0x1360
3 locks held by syz.6.673/8756:
1 lock held by syz.3.2004/14874:
 #0: ffff88810b82c0d8 (&type->s_umount_key#55){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.2.2141/15746:
 #0: ffff88810b82c0d8 (&type->s_umount_key#55){++++}-{4:4}, at: super_lock+0x2d6/0x3d0

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 34 Comm: khungtaskd Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
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/0x380
 sys_info+0x135/0x170
 watchdog+0xfd7/0x1030
 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: 8756 Comm: syz.6.673 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:debug_lockdep_rcu_enabled+0x29/0x40
Code: 90 f3 0f 1e fa 31 c0 83 3d c3 9b 87 04 00 74 1d 83 3d 9a cd 87 04 00 74 14 65 48 8b 0d 58 b5 9c 07 31 c0 83 b9 9c 0b 00 00 00 <0f> 94 c0 c3 cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc
RSP: 0018:ffffc90006a47228 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff8881bd1e3c00
RDX: 0000000000000000 RSI: 00000000000004c2 RDI: ffffffff8e25d799
RBP: 0000000000000003 R08: ffffea00042b7bf7 R09: 1ffffd4000856f7e
R10: dffffc0000000000 R11: fffff94000856f7f R12: 0000000000000002
R13: 0000000000000000 R14: ffffea00042b7bc0 R15: 0000000000000010
FS:  00007fb52bfdd6c0(0000) GS:ffff8882a8f5c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f289888e866 CR3: 000000000e946000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 __might_resched+0x22/0x4d0
 __filemap_get_folio_mpol+0xb9/0x1000
 __get_node_folio+0x20e/0xdf0
 f2fs_update_inode_page+0x9d/0x360
 f2fs_write_checkpoint+0xc4c/0x2710
 kill_f2fs_super+0x2f6/0x700
 deactivate_locked_super+0xbc/0x130
 cleanup_mnt+0x3d3/0x460
 task_work_run+0x1d9/0x270
 do_exit+0x73a/0x2360
 do_group_exit+0x22d/0x2f0
 get_signal+0x121b/0x12c0
 arch_do_signal_or_restart+0xbb/0x860
 exit_to_user_mode_loop+0x104/0x730
 do_syscall_64+0x353/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb52b15e90e
Code: Unable to access opcode bytes at 0x7fb52b15e8e4.
RSP: 002b:00007fb52bfdcf58 EFLAGS: 00000246 ORIG_RAX: 00000000000000e6
RAX: fffffffffffffdfc RBX: 00007fb52bfdd6c0 RCX: 00007fb52b15e90e
RDX: 00007fb52bfdcfb0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fb52b235024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb52b426218 R14: 00007fb52b426180 R15: 00007ffc0b8be478
 </TASK>
