INFO: task syz-executor:6672 blocked for more than 143 seconds.
      Not tainted 6.12.0-rc1-syzkaller-00165-g360c1f1f24c6 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D
 stack:20992 pid:6672  tgid:6672  ppid:1      flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5315 [inline]
 __schedule+0x1843/0x4ae0 kernel/sched/core.c:6675
 __schedule_loop kernel/sched/core.c:6752 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6767
 schedule_timeout+0xb0/0x310 kernel/time/timer.c:2591
 do_wait_for_common kernel/sched/completion.c:95 [inline]
 __wait_for_common kernel/sched/completion.c:116 [inline]
 wait_for_common kernel/sched/completion.c:127 [inline]
 wait_for_completion+0x355/0x620 kernel/sched/completion.c:148
 __flush_work+0xa37/0xc50 kernel/workqueue.c:4217
 flush_work kernel/workqueue.c:4238 [inline]
 flush_delayed_work+0x169/0x1c0 kernel/workqueue.c:4260
 invalidate_dquots fs/quota/dquot.c:577 [inline]
 dquot_disable+0x7a7/0x1cd0 fs/quota/dquot.c:2295
 ocfs2_disable_quotas+0xf3/0x210 fs/ocfs2/super.c:963
 ocfs2_dismount_volume+0x1ad/0x8f0 fs/ocfs2/super.c:1870
 generic_shutdown_super+0x139/0x2d0 fs/super.c:642
 kill_block_super+0x44/0x90 fs/super.c:1696
 deactivate_locked_super+0xc4/0x130 fs/super.c:473
 cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1373
 task_work_run+0x24f/0x310 kernel/task_work.c:228
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0xa2f/0x28e0 kernel/exit.c:939
 do_group_exit+0x207/0x2c0 kernel/exit.c:1088
 __do_sys_exit_group kernel/exit.c:1099 [inline]
 __se_sys_exit_group kernel/exit.c:1097 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1097
 x64_sys_call+0x2634/0x2640 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc67077dff9
RSP: 002b:00007ffd56c58118 EFLAGS: 00000246
 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007fc6707f0159 RCX: 00007fc67077dff9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 000000000000000d R08: 00007ffd56c55eb6 R09: 00007ffd56c593d0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd56c593d0
R13: 00007fc6707f0134 R14: 000000000002ebf9 R15: 00007ffd56c5a490
 </TASK>

Showing all locks held in the system:
3 locks held by kworker/u8:0/11:
 #0: 
ffff88801ac89148
 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
 #1: ffffc90000107d00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
 #1: ffffc90000107d00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
 #2: ffffffff8fcbf548 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:276
3 locks held by kworker/u8:1/12:
 #0: ffff88802e26f148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3204 [inline]
, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
 #1: 
ffffc90000117d00
 (
(work_completion)(&(&net->ipv6.addr_chk_work)->work)
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3205 [inline]
, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
 #2: 
ffffffff8fcbf548
 (
rtnl_mutex
){+.+.}-{3:3}
, at: addrconf_verify_work+0x19/0x30 net/ipv6/addrconf.c:4736
1 lock held by khungtaskd/30:
 #0: 
ffffffff8e937de0
 (
rcu_read_lock
){....}-{1:2}
, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6720
7 locks held by kworker/u8:5/1062:
2 locks held by kworker/u8:6/1308:
5 locks held by kworker/u9:1/4611:
 #0: 
ffff888061d8c148
 (
(wq_completion)hci5
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3204 [inline]
, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
 #1: 
ffffc9000d93fd00
 (
(work_completion)(&hdev->cmd_sync_work)
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3205 [inline]
, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
 #2: ffff888055968d80 (&hdev->req_lock){+.+.}-{3:3}
, at: hci_cmd_sync_work+0x1ec/0x400 net/bluetooth/hci_sync.c:327
 #3: 
ffff888055968078
 (
&hdev->lock
){+.+.}-{3:3}
, at: hci_abort_conn_sync+0x1ea/0xde0 net/bluetooth/hci_sync.c:5567
 #4: 
ffffffff8e93d378
 (
rcu_state.exp_mutex
){+.+.}-{3:3}
, at: exp_funnel_lock kernel/rcu/tree_exp.h:329 [inline]
, at: synchronize_rcu_expedited+0x451/0x830 kernel/rcu/tree_exp.h:976
1 lock held by dhcpcd/4887:
 #0: 
ffffffff8fcbf548
 (
rtnl_mutex
){+.+.}-{3:3}
, at: devinet_ioctl+0x2ce/0x1aa0 net/ipv4/devinet.c:1097
2 locks held by getty/4971:
 #0: 
ffff88814ca880a0
 (
&tty->ldisc_sem
){++++}-{0:0}
, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: 
ffffc90002f062f0
 (
&ldata->atomic_read_lock
){+.+.}-{3:3}
, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
4 locks held by kworker/u9:3/5224:
 #0: 
ffff88802e1f6148
 ((wq_completion)hci4){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
 ((wq_completion)hci4){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
 #1: 
ffffc90003be7d00
 (
(work_completion)(&hdev->cmd_sync_work)
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3205 [inline]
, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
 #2: 
ffff888079cecd80
 (
&hdev->req_lock
){+.+.}-{3:3}
, at: hci_cmd_sync_work+0x1ec/0x400 net/bluetooth/hci_sync.c:327
 #3: 
ffff888079cec078
 (
&hdev->lock
){+.+.}-{3:3}
, at: hci_abort_conn_sync+0x1ea/0xde0 net/bluetooth/hci_sync.c:5567
4 locks held by kworker/u8:9/5553:
 #0: 
ffff88801baeb148
 (
(wq_completion)netns
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3204 [inline]
, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
 #1: 
ffffc9000499fd00
 (
net_cleanup_work
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3205 [inline]
, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
 #2: 
ffffffff8fcb2a50
 (
pernet_ops_rwsem
){++++}-{3:3}
, at: cleanup_net+0x16a/0xcc0 net/core/net_namespace.c:580
 #3: 
ffffffff8fcbf548
 (
rtnl_mutex
){+.+.}-{3:3}
, at: default_device_exit_batch+0xe9/0xaa0 net/core/dev.c:11934
3 locks held by kworker/u8:10/6609:
 #0: 
ffff8880b873ea58
 (
&rq->__lock
){-.-.}-{2:2}
, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:593
 #1: 
ffff8880b8728948
 (
&per_cpu_ptr(group->pcpu, cpu)->seq