INFO: task syz.6.1227:15435 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.1227      state:D stack:25128 pid:15435 tgid:15433 ppid:15194  task_flags:0x400040 flags:0x00004004
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_read_slowpath+0x5fd/0x8f0
 down_read+0x98/0x2e0
 super_lock+0x2a9/0x3b0
 user_get_super+0xc8/0x120
 __se_sys_quotactl+0x4da/0x950
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe955b8eba9
RSP: 002b:00007fe956a9b038 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007fe955dd5fa0 RCX: 00007fe955b8eba9
RDX: 0000000000000000 RSI: 0000200000000040 RDI: ffffffff80000601
RBP: 00007fe955c11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000200000000940 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe955dd6038 R14: 00007fe955dd5fa0 R15: 00007ffc7e80f9d8
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8e139f20 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5680:
 #0: ffff88810f3950a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900029062f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400
2 locks held by kworker/u8:5/6154:
 #0: ffff88804b039f98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140
 #1: ffff88804b024008 (psi_seq){-.-.}-{0:0}, at: psi_task_switch+0x53/0x880
2 locks held by syz-executor/13058:
1 lock held by syz.6.1227/15435:
 #0: ffff8880398300e0 (&type->s_umount_key#60){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.3.1313/16269:
 #0: ffff8880398300e0 (&type->s_umount_key#60){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz-executor/16565:
 #0: ffffffff8e13f9b8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x3b9/0x730
1 lock held by syz-executor/17439:
 #0: ffffffff8e13f9b8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2f6/0x730
1 lock held by syz.6.1558/18499:
 #0: ffff8880398300e0 (&type->s_umount_key#60){++++}-{4:4}, at: super_lock+0x2a9/0x3b0

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

NMI backtrace for cpu 1
CPU: 1 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+0x189/0x250
 nmi_cpu_backtrace+0x39e/0x3d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 watchdog+0xf93/0xfe0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 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: 13058 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:check_preemption_disabled+0xa/0x120
Code: e3 8b eb 1c 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 41 57 41 56 53 48 83 ec 10 <65> 48 8b 05 be 6e 26 07 48 89 44 24 08 65 8b 05 c6 6e 26 07 65 8b
RSP: 0018:ffffc9000342f518 EFLAGS: 00000086
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 1211c9799b363700
RDX: 0000000000000000 RSI: ffffffff8dba8965 RDI: ffffffff8be33980
RBP: ffffffff81f6a4dc R08: 0000000000000000 R09: ffffffff81f6a4dc
R10: 0000000000000406 R11: 0000000000000000 R12: 0000000000000002
R13: ffffffff8e139f20 R14: 0000000000000000 R15: 0000000000000246
FS:  000055557dc00500(0000) GS:ffff8880b8615000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555572705608 CR3: 0000000023a64000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 lock_acquire+0x130/0x360
 folio_try_get+0x38/0x340
 filemap_get_entry+0x1b8/0x2f0
 __filemap_get_folio+0x68/0xaf0
 f2fs_grab_cache_folio+0x2b/0x380
 __get_node_folio+0x194/0x1410
 f2fs_update_inode_page+0x82/0x190
 f2fs_write_checkpoint+0xb6e/0x1df0
 kill_f2fs_super+0x2c3/0x6c0
 deactivate_locked_super+0xbc/0x130
 cleanup_mnt+0x425/0x4c0
 task_work_run+0x1d4/0x260
 exit_to_user_mode_loop+0xec/0x110
 do_syscall_64+0x2bd/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff47018fed7
Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 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 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffc045bbf28 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007ff470211c05 RCX: 00007ff47018fed7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc045bbfe0
RBP: 00007ffc045bbfe0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffc045bd070
R13: 00007ff470211c05 R14: 000000000005f9c9 R15: 00007ffc045bd0b0
 </TASK>
