INFO: task syz.6.3684:22257 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.3684      state:D stack:24960 pid:22257 tgid:22256 ppid:22034  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: 0033:0x7f3a63b9c799
RSP: 002b:00007f3a64a6c028 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f3a63e15fa0 RCX: 00007f3a63b9c799
RDX: 0000000000000000 RSI: 0000200000002540 RDI: ffffffff80000900
RBP: 00007f3a63c32c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3a63e16038 R14: 00007f3a63e15fa0 R15: 00007ffca513c308
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/35:
 #0: ffffffff8e75e520 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5639:
 #0: ffff88811226d0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc9000356e2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13c0
3 locks held by syz-executor/15479:
1 lock held by syz.6.3684/22257:
 #0: ffff88810569e0e0 (&type->s_umount_key#55){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
2 locks held by udevd/22361:
1 lock held by syz.2.3715/22525:
 #0: ffff88810569e0e0 (&type->s_umount_key#55){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.0.4141/24273:
 #0: ffff88810569e0e0 (&type->s_umount_key#55){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
4 locks held by syz.4.4396/26806:
1 lock held by syz.9.4397/26808:
 #0: ffff88810dd9e0e0 (&type->s_umount_key#64/1){+.+.}-{4:4}, at: alloc_super+0x28c/0xab0

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

NMI backtrace for cpu 0
CPU: 0 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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 15479 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:__rcu_read_lock+0x29/0x60
Code: 90 f3 0f 1e fa 53 65 48 8b 1d 7b c6 70 11 48 81 c3 c4 04 00 00 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 <84> c0 75 18 ff 03 8b 03 3d 00 00 00 40 7d 07 5b c3 cc cc cc cc cc
RSP: 0018:ffffc90003627500 EFLAGS: 00000a07
RAX: 0000000000000000 RBX: ffff88817672dc84 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffea0004669fc0
RBP: ffffc90003627618 R08: ffff88817672d7c0 R09: 0000000000000003
R10: 0000000000000406 R11: 0000000000000000 R12: 1ffff920006c4ea8
R13: dffffc0000000000 R14: ffffea0004669fc0 R15: ffffc90003627560
FS:  00005555784b1500(0000) GS:ffff8882a945d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbcfdfbd000 CR3: 000000011a118000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 folio_try_get+0x15/0x340
 filemap_get_entry+0x1d5/0x320
 __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: 0033:0x7fed9559d9d7
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:00007ffee4f524a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fed95632050 RCX: 00007fed9559d9d7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffee4f52560
RBP: 00007ffee4f52560 R08: 00007ffee4f53560 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffee4f535f0
R13: 00007fed95632050 R14: 000000000004f03b R15: 00007ffee4f53630
 </TASK>
