INFO: task syz.1.980:20496 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.980       state:D stack:24960 pid:20496 tgid:20495 ppid:20062  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: 0033:0x7f0e0f79c799
RSP: 002b:00007f0e1057d028 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f0e0fa15fa0 RCX: 00007f0e0f79c799
RDX: 0000000000000000 RSI: 0000200000000280 RDI: ffffffff80000602
RBP: 00007f0e0f832c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0e0fa16038 R14: 00007f0e0fa15fa0 R15: 00007fff02da6258
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8e75e520 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5636:
 #0: ffff88816b6780a0 (&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 kworker/u8:5/6636:
 #0: ffff88823c63ade0 (&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: ffffffff8e75e520 (rcu_read_lock){....}-{1:3}, at: unwind_next_frame+0xa5/0x23c0
2 locks held by syz-executor/10869:
2 locks held by syz-executor/14909:
1 lock held by syz.1.980/20496:
 #0: ffff88817294e0e0 (&type->s_umount_key#61){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
2 locks held by syz-executor/20668:
1 lock held by syz.2.1143/21789:
 #0: ffff88817294e0e0 (&type->s_umount_key#61){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz-executor/22891:
 #0: ffff888168dda0e0 (&type->s_umount_key#67){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
1 lock held by syz.6.1407/24645:
 #0: ffff88810a9a60e0 (&type->s_umount_key#61){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.7.1441/24869:

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

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+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: 85 Comm: kworker/u10:5 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
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:update_se+0x260/0x620
Code: 4d 8b 7d 00 49 8d af 98 01 00 00 48 89 e8 48 c1 e8 03 0f b6 04 18 84 c0 0f 85 25 02 00 00 48 8b 04 24 4c 8d 68 80 83 7d 00 00 <74> 48 49 8d af 38 01 00 00 49 81 c4 90 09 00 00 4c 89 e0 48 c1 e8
RSP: 0018:ffffc9000282f588 EFLAGS: 00000046
RAX: ffff888168fad840 RBX: dffffc0000000000 RCX: 0000000080000003
RDX: 0000000000000000 RSI: ffffffff8c27c9e0 RDI: ffffffff8c27c9a0
RBP: ffff888102e8cc98 R08: ffffffff9011a8b7 R09: 1ffffffff2023516
R10: dffffc0000000000 R11: fffffbfff2023517 R12: ffff888168fad7c0
R13: ffff888168fad7c0 R14: 00000000005d3a61 R15: ffff888102e8cb00
FS:  0000000000000000(0000) GS:ffff8882a945d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5d6bbbd000 CR3: 000000000e54c000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 update_curr+0x77/0x4f0
 dequeue_entities+0x1a7/0x3710
 dequeue_task_fair+0x1fd/0x7b0
 __schedule+0x666/0x52d0
 schedule+0x164/0x360
 toggle_allocation_gate+0x17c/0x290
 process_scheduled_works+0xb6e/0x18c0
 worker_thread+0xa53/0xfc0
 kthread+0x388/0x470
 ret_from_fork+0x51e/0xb90
 ret_from_fork_asm+0x1a/0x30
 </TASK>
