INFO: task syz.2.1069:23640 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.1069      state:D stack:25464 pid:23640 tgid:23639 ppid:21101  task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x1821/0x5740
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_write_slowpath+0x883/0x1080
 down_write+0x1bc/0x200
 super_lock+0x289/0x3d0
 user_get_super+0xc8/0x120
 __se_sys_quotactl+0x540/0x9e0
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd25cd9cdd9
RSP: 002b:00007fd25dcba028 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007fd25d015fa0 RCX: 00007fd25cd9cdd9
RDX: 0000000000000000 RSI: 00002000000002c0 RDI: ffffffff80000201
RBP: 00007fd25ce32d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd25d016038 R14: 00007fd25d015fa0 R15: 00007ffd07b92248
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/35:
 #0: ffffffff8e95cd60 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5436:
 #0: ffff888175a300a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900034732e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13a0
3 locks held by syz-executor/10716:
2 locks held by syz-executor/17296:
2 locks held by syz-executor/22236:
1 lock held by syz.2.1069/23640:
 #0: ffff888113b7e0d8 (&type->s_umount_key#62){++++}-{4:4}, at: super_lock+0x289/0x3d0
1 lock held by syz.1.1299/27015:
 #0: ffff888113b7e0d8 (&type->s_umount_key#62){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.8.1359/27946:
 #0: ffff888113b7e0d8 (&type->s_umount_key#62){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.0.1393/28847:
 #0: ffff8881b41a60d8 (&type->s_umount_key#62){++++}-{4:4}, at: super_lock+0x289/0x3d0
2 locks held by syz.6.1405/29006:

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

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+0xfd3/0x1030
 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: 22236 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+0x1d/0xe0
Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 55 41 57 41 56 53 65 8b 05 87 4f 90 07 65 8b 0d 7c 4f 90 07 f7 c1 ff ff ff 7f 74 0c 5b <41> 5e 41 5f 5d e9 d9 d7 02 00 cc 9c 59 f7 c1 00 02 00 00 74 ea 65
RSP: 0018:ffffc90000a08c98 EFLAGS: 00000006
RAX: 0000000000000001 RBX: 0000000000000001 RCX: 0000000080010003
RDX: 0000000000010000 RSI: ffffffff8e21d8e3 RDI: ffffffff8c28b4e0
RBP: 00000000ffffffff R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000141190 R12: 0000000000000046
R13: ffff888115503b00 R14: ffff88823c63aea0 R15: 0000000000000004
FS:  000055556afe0500(0000) GS:ffff8882a928c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005617d2869c48 CR3: 0000000107350000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 lock_is_held_type+0xdf/0x150
 update_rq_clock+0x8f/0x570
 try_to_wake_up+0x710/0x1380
 hrtimer_wakeup+0x4e/0x60
 __hrtimer_run_queues+0x3c0/0xa20
 hrtimer_interrupt+0x44b/0x950
 __sysvec_apic_timer_interrupt+0x102/0x430
 sysvec_apic_timer_interrupt+0xa1/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:kasan_check_range+0x10/0x2c0
Code: 26 f7 fe 90 0f 0b cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 55 41 57 41 56 41 55 41 54 53 b0 01 <48> 85 f6 0f 84 ae 01 00 00 4c 8d 04 37 49 39 f8 0f 82 36 02 00 00
RSP: 0018:ffffc9000a767808 EFLAGS: 00000246
RAX: ffffffff84358b01 RBX: ffff8881af530b78 RCX: ffffffff8435880d
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8881af5310f0
RBP: ffffc9000a767bb0 R08: ffff8881af53036f R09: 1ffff11035ea606d
R10: dffffc0000000000 R11: ffffed1035ea606e R12: ffff8881b41a4887
R13: dffffc0000000000 R14: ffff8881af5310f0 R15: dffffc0000000000
 f2fs_write_checkpoint+0x99d/0x26a0
 kill_f2fs_super+0x314/0x730
 deactivate_locked_super+0xbc/0x130
 cleanup_mnt+0x437/0x4d0
 task_work_run+0x1d9/0x270
 exit_to_user_mode_loop+0xf3/0x4d0
 do_syscall_64+0x33e/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f13ef99e017
Code: a2 c7 05 dc 06 25 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:00007fffe968b0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f13efa32120 RCX: 00007f13ef99e017
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fffe968b1a0
RBP: 00007fffe968b1a0 R08: 00007fffe968c1a0 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fffe968c230
R13: 00007f13efa32120 R14: 0000000000071e34 R15: 00007fffe968c270
 </TASK>
