INFO: task syz.6.1300:10919 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.1300      state:D stack:27112 pid:10919 tgid:10918 ppid:10730  task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_write_slowpath+0x872/0xfe0
 down_write+0x1ab/0x1f0
 super_lock+0x25c/0x3b0
 user_get_super+0xc8/0x120
 __se_sys_quotactl+0x4da/0x950
 do_syscall_64+0xfa/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f32b0d8efc9
RSP: 002b:00007f32b1bc9038 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f32b0fe5fa0 RCX: 00007f32b0d8efc9
RDX: 0000000000000000 RSI: 0000200000005700 RDI: ffffffff80000201
RBP: 00007f32b0e11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000200000005740 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f32b0fe6038 R14: 00007f32b0fe5fa0 R15: 00007ffdfa8c9288
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/35:
 #0: ffffffff8df3d620 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5638:
 #0: ffff8881144c40a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc9000356e2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400
2 locks held by syz-executor/7016:
1 lock held by syz.6.1300/10919:
 #0: ffff8881721a20e0 (&type->s_umount_key#51){++++}-{4:4}, at: super_lock+0x25c/0x3b0
1 lock held by syz.7.1482/11567:
 #0: ffff8881721a20e0 (&type->s_umount_key#51){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz-executor/12651:
 #0: ffffffff8df430b8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x3b9/0x730
5 locks held by syz.1.1845/13109:
 #0: ffff88816b774420 (sb_writers#18){.+.+}-{0:0}, at: vfs_writev+0x288/0x960
 #1: ffff8881b70b2ed0 (&sb->s_type->i_mutex_key#39){+.+.}-{4:4}, at: udf_file_write_iter+0x6e/0x6c0
 #2: 
ffff8881b70b2d00 (&ei->i_data_sem#2){++++}-{4:4}, at: udf_map_block+0x283/0x45f0
 #3: ffff88812123a058 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140
 #4: ffff888121224048 (psi_seq){-.-.}-{0:0}, at: psi_task_switch+0x53/0x880
2 locks held by syz.1.1845/13138:
3 locks held by syz.5.1847/13136:

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

NMI backtrace for cpu 1
CPU: 1 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+0x189/0x250
 nmi_cpu_backtrace+0x39e/0x3d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 watchdog+0xf60/0xfa0
 kthread+0x711/0x8a0
 ret_from_fork+0x4bc/0x870
 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: 7016 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+0x40/0x120
Code: 08 65 8b 05 e6 34 27 07 65 8b 0d db 34 27 07 f7 c1 ff ff ff 7f 74 23 65 48 8b 0d bb 34 27 07 48 3b 4c 24 08 0f 85 cc 00 00 00 <48> 83 c4 10 5b 41 5e 41 5f 5d c3 cc cc cc cc cc 48 c7 04 24 00 00
RSP: 0018:ffffc90004477580 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000287 RCX: 861413c519707200
RDX: 0000000000000002 RSI: ffffffff8d8f6bfb RDI: ffffffff8bbf12e0
RBP: ffff88816c6c8b80 R08: ffff8881b70c1b6b R09: 1ffff11036e1836d
R10: dffffc0000000000 R11: ffffed1036e1836e R12: 0000000000000002
R13: 0000000000000002 R14: ffff8881b70c1b80 R15: ffff88816c6c8000
FS:  000055556c130500(0000) GS:ffff88818eb32000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f433d4ebfc8 CR3: 000000016860e000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 lock_release+0x27a/0x3e0
 _raw_spin_unlock+0x16/0x50
 writeback_single_inode+0x444/0x6a0
 sync_inode_metadata+0xb9/0x110
 f2fs_write_checkpoint+0xaf2/0x2440
 kill_f2fs_super+0x2cc/0x6d0
 deactivate_locked_super+0xbc/0x130
 cleanup_mnt+0x425/0x4c0
 task_work_run+0x1d4/0x260
 exit_to_user_mode_loop+0xe9/0x130
 do_syscall_64+0x2bd/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f53a6d902f7
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:00007fff2d9384c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f53a6e11d7d RCX: 00007f53a6d902f7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fff2d938580
RBP: 00007fff2d938580 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007fff2d939610
R13: 00007f53a6e11d7d R14: 0000000000036813 R15: 00007fff2d939650
 </TASK>
ip6_tunnel: ip6gretap1 xmit: Local address not yet configured!
