INFO: task syz.6.597:10913 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.597       state:D stack:25128 pid:10913 tgid:10912 ppid:10202  task_flags:0x400140 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
 __iterate_supers+0x126/0x290
 __se_sys_quotactl+0x353/0x950
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f40f278ebe9
RSP: 002b:00007f40f35e2038 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f40f29b5fa0 RCX: 00007f40f278ebe9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000100
RBP: 00007f40f2811e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f40f29b6038 R14: 00007f40f29b5fa0 R15: 00007fffaf8e9928
 </TASK>
INFO: task syz.6.597:10914 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.597       state:D stack:28104 pid:10914 tgid:10912 ppid:10202  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
 __iterate_supers+0x126/0x290
 __se_sys_quotactl+0x353/0x950
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f40f278ebe9
RSP: 002b:00007f40f35c1038 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f40f29b6090 RCX: 00007f40f278ebe9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000102
RBP: 00007f40f2811e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f40f29b6128 R14: 00007f40f29b6090 R15: 00007fffaf8e9928
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8e139ee0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
9 locks held by kworker/u10:2/40:
 #0: ffff888136639f98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140
 #1: ffff888136624008 (psi_seq){-.-.}-{0:0}, at: psi_task_switch+0x53/0x880
 #2: ffff88802044a0e0 (&lo->lo_work_lock){..-.}-{3:3}, at: loop_process_work+0xb41/0xf90
 #3: ffff88811222c098 (&entry->wait){..-.}-{3:3}, at: __wake_up_common_lock+0x2f/0x1f0
 #4: ffff888136624008 (psi_seq){-.-.}-{0:0}, at: filemap_remove_folio+0xdc/0x1f0
 #5: ffffffff8e139ee0 (rcu_read_lock){....}-{1:3}, at: __lruvec_stat_mod_folio+0x79/0x2f0
 #6: ffffffff8e139ee0 (rcu_read_lock){....}-{1:3}, at: unwind_next_frame+0xa5/0x2390
 #7: ffffffff8e139ee0 (rcu_read_lock){....}-{1:3}, at: unwind_next_frame+0xa5/0x2390
 #8: ffff88811e080438 (&sb->s_type->i_lock_key#41){+.+.}-{3:3}, at: inode_add_bytes+0x38/0x140
2 locks held by getty/5673:
 #0: ffff888028c4f0a0 (&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 syz-executor/10324:
1 lock held by syz.6.597/10913:
 #0: ffff8881124760e0 (&type->s_umount_key#76){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.6.597/10914:
 #0: ffff8881124760e0 (&type->s_umount_key#76){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.9.881/13270:
 #0: ffff8881124760e0 (&type->s_umount_key#76){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
2 locks held by syz-executor/13609:
 #0: ffff8880435c80e0 (&type->s_umount_key#76){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
 #1: ffffffff8e13f840 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x570
6 locks held by syz.7.973/13907:

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

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+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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 10324 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:__lock_acquire+0x50c/0xd20
Code: 49 83 c7 28 41 89 c4 48 39 cb 0f 8d d6 00 00 00 48 83 fb 31 0f 83 92 00 00 00 41 8b 07 25 ff 1f 00 00 48 0f a3 05 24 b0 0a 12 <73> 10 48 69 c0 c8 00 00 00 48 8d 88 10 13 49 93 eb 40 83 3d 8b 3f
RSP: 0018:ffffc900030ff590 EFLAGS: 00000003
RAX: 0000000000000246 RBX: 0000000000000002 RCX: 0000000000000003
RDX: 0000000000000004 RSI: 0000000000000004 RDI: ffff8881061cb980
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff82420128
R10: dffffc0000000000 R11: fffff5200061febc R12: 0000000000000004
R13: 0000000000000003 R14: ffff8881061cc4e8 R15: ffff8881061cc4e0
FS:  0000555574e3f500(0000) GS:ffff8881a3c1b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055556d0ee5c8 CR3: 0000000035b10000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 lock_acquire+0x120/0x360
 _raw_spin_lock+0x2e/0x40
 writeback_single_inode+0x218/0x6a0
 sync_inode_metadata+0xb9/0x110
 f2fs_write_checkpoint+0xb06/0x1df0
 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: 0033:0x7f3697f8ff17
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:00007ffcc7984028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f3698011c05 RCX: 00007f3697f8ff17
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffcc79840e0
RBP: 00007ffcc79840e0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffcc7985170
R13: 00007f3698011c05 R14: 0000000000035657 R15: 00007ffcc79851b0
 </TASK>
