INFO: task syz.3.984:11435 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.984       state:D stack:25464 pid:11435 tgid:11434 ppid:10520  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: 0033:0x7f8dfc59cdd9
RSP: 002b:00007f8dfd47a028 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f8dfc815fa0 RCX: 00007f8dfc59cdd9
RDX: 0000000000000000 RSI: 0000200000000c80 RDI: ffffffff80000300
RBP: 00007f8dfc632d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8dfc816038 R14: 00007f8dfc815fa0 R15: 00007ffc8b1be8d8
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8e95cd60 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5437:
 #0: ffff888114e1b0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900034762e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13a0
2 locks held by syz-executor/5625:
2 locks held by syz-executor/5635:
2 locks held by syz-executor/5976:
3 locks held by syz-executor/7869:
1 lock held by syz.3.984/11435:
 #0: ffff8881136740d8 (&type->s_umount_key#51){++++}-{4:4}, at: super_lock+0x289/0x3d0
1 lock held by syz.2.1190/12151:
 #0: ffff8881b44820d8 (&type->s_umount_key#51){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.7.1208/12233:
 #0: ffff8881136740d8 (&type->s_umount_key#51){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.0.1210/12239:
 #0: ffff88810be600d8 (&type->s_umount_key#51){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
3 locks held by syz-executor/12611:
1 lock held by syz.5.1269/12891:
 #0: ffff8881b324e0d8 (&type->s_umount_key#51){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
2 locks held by syz.4.1277/12944:

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

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+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: 5976 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:kasan_check_range+0x63/0x2c0
Code: 00 00 00 00 00 ff 4c 39 cf 0f 82 14 02 00 00 49 89 ff 49 c1 ef 03 49 ba 00 00 00 00 00 fc ff df 4f 8d 1c 17 49 ff c8 4d 89 c1 <49> c1 e9 03 48 bb 01 00 00 00 00 fc ff df 4d 8d 34 19 4d 89 f4 4d
RSP: 0018:ffffc90004a0f7b0 EFLAGS: 00000296
RAX: 0000000000000001 RBX: ffff888113bf44a0 RCX: ffffffff81a14aa8
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff888113bf44a8
RBP: ffff888113bf4500 R08: ffff888113bf44af R09: ffff888113bf44af
R10: dffffc0000000000 R11: ffffed102277e895 R12: ffff888113bf44a8
R13: dffffc0000000000 R14: 1ffff1102277e8a0 R15: 1ffff1102277e895
FS:  0000555561357500(0000) GS:ffff8882a928d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000564cf86107b8 CR3: 0000000169990000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 up_write+0xa8/0x410
 f2fs_write_checkpoint+0xa5e/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: 0033:0x7f4e73b9e017
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:00007ffc933f4d08 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f4e73c32120 RCX: 00007f4e73b9e017
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc933f4dc0
RBP: 00007ffc933f4dc0 R08: 00007ffc933f5dc0 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc933f5e50
R13: 00007f4e73c32120 R14: 0000000000028591 R15: 00007ffc933f5e90
 </TASK>
