INFO: task syz-executor:6189 blocked for more than 143 seconds.
      Not tainted 6.12.0-rc2-syzkaller-00050-g5b7c893ed5ed #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:20992 pid:6189  tgid:6189  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: 0033:0x7f6dc6f7dff9
RSP: 002b:00007ffd25fec0c8 EFLAGS: 00000246
 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f6dc6ff0159 RCX: 00007f6dc6f7dff9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 000000000000000d R08: 00007ffd25fe9e66 R09: 00007ffd25fed380
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd25fed380
R13: 00007f6dc6ff0134 R14: 00000000000257dd R15: 00007ffd25fee440
 </TASK>

Showing all locks held in the system:
10 locks held by kworker/u8:0/11:
2 locks held by kworker/u8:1/12:
1 lock held by khungtaskd/30:
 #0: ffffffff8e937de0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
 #0: ffffffff8e937de0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #0: ffffffff8e937de0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6720
3 locks held by kworker/1:1/47:
 #0: ffff88801ac80948 ((wq_completion)events
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3204 [inline]
, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
 #1: 
ffffc90000b77d00
 (
(work_completion)(&data->fib_event_work)
){+.+.}-{0:0}
, at: psi_task_switch+0x41d/0x7a0 kernel/sched/psi.c:987
 #2: 
ffff88804c12c538
 (
&idev->mc_lock
){+.+.}-{3:3}, at: spin_lock_irq include/linux/spinlock.h:376 [inline]
){+.+.}-{3:3}, at: srcu_reschedule+0x45/0x170 kernel/rcu/srcutree.c:1789
5 locks held by kworker/u8:3/53:
 #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
){-.-.}-{0:0}
, at: psi_task_switch+0x17c/0x7a0 kernel/sched/psi.c:937
 #2: 
ffff8880b872a718
 (
&base->lock
){-.-.}-{2:2}
, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
, at: batadv_nc_process_nc_paths+0xb5/0x3a0 net/batman-adv/network-coding.c:687
 #3: 
ffffffff9a6156f8
 (
&obj_hash[i].lock
){-.-.}-{2:2}
, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:593
 #4: 
ffff8880b873ea58
 (
&rq->__lock
){-.-.}-{2:2}
, at: psi_task_change+0xed/0x270 kernel/sched/psi.c:912
3 locks held by kworker/u8:4/62:
 #0: 
ffff88802dfcf148
 (
(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: 
ffffc900015d7d00
 (
(work_completion)(&(&ifa->dad_work)->work)
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3205 [inline]
, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
 #2: 
ffffffff8fcbf8c8
 (
rtnl_mutex
){+.+.}-{3:3}
, at: addrconf_dad_work+0xd0/0x16f0 net/ipv6/addrconf.c:4196
2 locks held by kworker/u8:5/1102:
 #0: 
ffff88801ac89148
 (
(wq_completion)events_unbound
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3204 [inline]
, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
 #1: 
ffffc90004497d00
 (
(reaper_work).work
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3205 [inline]
, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
2 locks held by getty/4983:
 #0: 
ffff88802efeb0a0
 (
&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
1 lock held by syz-executor/6012:
 #0: 
ffff88806bf8c0e0
 (
&type->s_umount_key
#31
){++++}-{3:3}
, at: __super_lock fs/super.c:56 [inline]
, at: __super_lock_excl fs/super.c:71 [inline]
, at: deactivate_super+0xb5/0xf0 fs/super.c:505
1 lock held by syz-executor/6189:
 #0: 
ffff888031f000e0
 (
&type->s_umount_key
#81
){++++}-{3:3}
, at: __super_lock fs/super.c:56 [inline]
, at: __super_lock_excl fs/super.c:71 [inline]
, at: deactivate_super+0xb5/0xf0 fs/super.c:505
3 locks held by kworker/u8:9/6300:
 #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
){-.-.}-{0:0}
, at: psi_task_switch+0x41d/0x7a0 kernel/sched/psi.c:987
 #2: ffffffff9a5efa90 (&obj_hash[i].lock){-.-.}-{2:2}
, at: __debug_check_no_obj_freed lib/debugobjects.c:978 [inline]
, at: debug_check_no_obj_freed+0x234/0x580 lib/debugobjects.c:1019
1 lock held by syz.2.191/6949:
 #0: 
ffff888031f000e0
 (
&type->s_umount_key
#81
){++++}-{3:3}
, at: __super_lock fs/super.c:58 [inline]
, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz.1.209/7192:
 #0: 
ffff888031f000e0
 (
&type->s_umount_key
#81
){++++}-{3:3}
, at: __super_lock fs/super.c:58 [inline]
, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz.3.221/7309:
 #0: 
ffff88806bf8c0e0
 (
&type->s_umount_key
#31
){++++}-{3:3}
, at: __super_lock fs/super.c:58 [inline]
, at: super_lock+0x27c/0x400 fs/super.c:120
1 lock held by syz.1.248/7633:
 #0: 
ffff888031f000e0
 (
&type->s_umount_key
#81
){++++}-{3:3}
, at: __super_lock fs/super.c:58 [inline]
, at: super_lock+0x27c/0x400 fs/super.c:120
3 locks held by syz-executor/7687:
 #0: 
ffffffff8fcbf8c8
 (
rtnl_mutex
){+.+.}-{3:3}
, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6643
 #1: 
ffff888057255428
 (