INFO: task syz.4.868:12487 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.868       state:D stack:24944 pid:12487 tgid:12486 ppid:11432  task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x17b4/0x5680
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_read_slowpath+0x6d9/0x940
 down_read+0x99/0x2e0
 super_lock+0x2d6/0x3d0
 __iterate_supers+0x126/0x250
 __ia32_sys_sync+0xa0/0x120
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f60e5b9cdd9
RSP: 002b:00007f60e3df6028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007f60e5e15fa0 RCX: 00007f60e5b9cdd9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f60e5e15fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f60e5e16038 R14: 00007f60e5e15fa0 R15: 00007ffe5e852dc8
 </TASK>

Showing all locks held in the system:
3 locks held by kworker/u8:0/12:
 #0: ffff88823c63aea0 (&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: ffffffff8fdce9c0 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_dad_work+0x11e/0x14c0
3 locks held by kworker/1:0/24:
 #0: ffff88810006b140 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0xa35/0x1860
 #1: ffff88823c624588 (psi_seq){-.-.}-{0:0}, at: psi_task_switch+0x53/0x880
 #2: ffff88823c626118 (&base->lock){-.-.}-{2:2}, at: __mod_timer+0x1ae/0xf30
2 locks held by kworker/u10:0/27:
 #0: ffff8881000ac940 ((wq_completion)events_unbound#2){+.+.}-{0:0}, at: process_scheduled_works+0xa35/0x1860
 #1: ffffc90000a27c40 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_scheduled_works+0xa70/0x1860
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: ffff8881161d70a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc9000346b2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13a0
3 locks held by kworker/1:3/5674:
 #0: ffff88810006b140 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0xa35/0x1860
 #1: ffffc90004b37c40 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_scheduled_works+0xa70/0x1860
 #2: ffff8881b9c67230 (&data->fib_lock){+.+.}-{4:4}, at: nsim_fib_event_work+0x202/0x3d0
2 locks held by syz-executor/11746:
3 locks held by syz-executor/12304:
1 lock held by syz.4.868/12487:
 #0: ffff8880234160d8 (&type->s_umount_key#57){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
5 locks held by kworker/u11:3/12737:
 #0: ffff888118581140 ((wq_completion)hci5){+.+.}-{0:0}, at: process_scheduled_works+0xa35/0x1860
 #1: ffffc9000709fc40 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0xa70/0x1860
 #2: ffff888023878ea0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x1d3/0x400
 #3: ffff8880238780b8 (&hdev->lock){+.+.}-{4:4}, at: hci_abort_conn_sync+0xa6f/0x1190
 #4: ffffffff8e963068 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2d0/0x770
2 locks held by syz-executor/13012:
 #0: ffff8881b96c40d8 (&type->s_umount_key#55){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
 #1: ffffffff8edf7c40 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520
2 locks held by syz-executor/13548:
 #0: ffff88816e2c40d8 (&type->s_umount_key#55){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
 #1: ffffffff8edf7c40 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520
1 lock held by syz.8.972/13916:
 #0: ffff8880234160d8 (&type->s_umount_key#57){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.1.1055/14548:
 #0: ffff8880234160d8 (&type->s_umount_key#57){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz.9.1133/15059:
2 locks held by syz.4.1134/15066:
3 locks held by modprobe/15071:

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

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: 11746 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+0x71/0x2c0
Code: 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 29 dc 49 83 fc 10 7f 29 4d 85 e4 0f 84 3d
RSP: 0018:ffffc90007b1f3b8 EFLAGS: 00000a02
RAX: 0000000000000001 RBX: dffffc0000000001 RCX: ffffffff81a2447d
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88802151d0a8
RBP: 0000000000000000 R08: ffff88802151d0ab R09: 1ffff110042a3a15
R10: dffffc0000000000 R11: ffffed10042a3a15 R12: dffffc0000000000
R13: ffff88802151d0a8 R14: ffff88802151d0ac R15: 1ffff110042a3a15
FS:  00005555920d1500(0000) GS:ffff8882a9293000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9ee205b6a8 CR3: 0000000115f54000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 do_raw_spin_unlock+0x4d/0x210
 _raw_spin_unlock+0x1e/0x50
 writeback_single_inode+0x921/0xdc0
 sync_inode_metadata+0x122/0x1d0
 f2fs_write_checkpoint+0xb93/0x26a0
 kill_f2fs_super+0x314/0x730
 deactivate_locked_super+0xbc/0x130
 cleanup_mnt+0x437/0x4d0
 task_work_run+0x1d9/0x270
 do_exit+0x70f/0x22c0
 do_group_exit+0x21b/0x2d0
 __x64_sys_exit_group+0x3f/0x40
 x64_sys_call+0x221a/0x2240
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd1d2f9cdd9
Code: Unable to access opcode bytes at 0x7fd1d2f9cdaf.
RSP: 002b:00007fff5563d5d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007fd1d3032192 RCX: 00007fd1d2f9cdd9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000010 R08: 0000000000000000 R09: 00007fd1d3032120
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff5563e890
R13: 00007fd1d3032120 R14: 00005555920d14e8 R15: 00007fff5563f960
 </TASK>
