INFO: task syz-executor:6900 blocked for more than 143 seconds.
      Not tainted 6.12.0-syzkaller-08446-g228a1157fb9f #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D
 stack:15328 pid:6900  tgid:6900  ppid:1      flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5369 [inline]
 __schedule+0x17fb/0x4be0 kernel/sched/core.c:6756
 __schedule_loop kernel/sched/core.c:6833 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6848
 schedule_timeout+0xb0/0x290 kernel/time/sleep_timeout.c:75
 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:4231
 flush_work kernel/workqueue.c:4252 [inline]
 flush_delayed_work+0x169/0x1c0 kernel/workqueue.c:4274
 invalidate_dquots fs/quota/dquot.c:576 [inline]
 dquot_disable+0x7a7/0x1cd0 fs/quota/dquot.c:2294
 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:1710
 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:239
 exit_task_work include/linux/task_work.h:43 [inline]
 do_exit+0xa2f/0x28e0 kernel/exit.c:938
 do_group_exit+0x207/0x2c0 kernel/exit.c:1087
 __do_sys_exit_group kernel/exit.c:1098 [inline]
 __se_sys_exit_group kernel/exit.c:1096 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1096
 x64_sys_call+0x26a8/0x26b0 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: 0033:0x7f72bcb7e819
RSP: 002b:00007ffed599e078 EFLAGS: 00000246
 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f72bcbf166e RCX: 00007f72bcb7e819
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000016 R08: 00007ffed599be16 R09: 00007ffed599f330
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffed599f330
R13: 00007f72bcbf15fc R14: 000055558f4354a8 R15: 00007ffed59a14e0
 </TASK>

Showing all locks held in the system:
1 lock held by pool_workqueue_/3:
 #0: 
ffffffff8e941ab8
 (
rcu_state.exp_mutex
){+.+.}-{4:4}
, at: exp_funnel_lock kernel/rcu/tree_exp.h:329 [inline]
, at: synchronize_rcu_expedited+0x451/0x830 kernel/rcu/tree_exp.h:976
2 locks held by kworker/u8:1/12:
1 lock held by khungtaskd/30:
 #0: 
ffffffff8e93c520
 (
rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6744
3 locks held by kworker/u8:3/52:
 #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: 
ffffc90000bc7d00
 (
(linkwatch_work).work
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3205 [inline]
, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
 #2: 
ffffffff8fcc64c8
 (
rtnl_mutex
){+.+.}-{4:4}
, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:276
7 locks held by kworker/u8:4/81:
2 locks held by kworker/u8:5/1076:
 #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: 
ffffc9000404fd00
 (
connector_reaper_work
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3205 [inline]
, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
3 locks held by kworker/u8:6/1094:
 #0: ffff888030e3d148 ((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: 
ffffc9000414fd00
 (
(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: 
ffffffff8fcc64c8
 (
rtnl_mutex
){+.+.}-{4:4}
, at: addrconf_dad_work+0xd0/0x16f0 net/ipv6/addrconf.c:4196
5 locks held by kworker/u8:7/1150:
 #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: 
ffffc900041bfd00
 (
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: 
ffffffff8fcb9990
 (
pernet_ops_rwsem
){++++}-{4:4}
, at: cleanup_net+0x16a/0xcc0 net/core/net_namespace.c:586
 #3: ffff88807d5394e8 (&wg->device_update_lock){+.+.}-{4:4}, at: wg_destruct+0x110/0x2e0 drivers/net/wireguard/device.c:249
 #4: 
ffffffff8e941980
 (
rcu_state.barrier_mutex
){+.+.}-{4:4}
, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:4565
2 locks held by getty/5598:
 #0: ffff8880319c90a0
 (
&tty->ldisc_sem
){++++}-{0:0}
, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: 
ffffc900032db2f0
 (
&ldata->atomic_read_lock
){+.+.}-{4:4}
, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
1 lock held by dhcpcd/6843:
 #0: 
ffff888057f02608
 (
&sb->s_type->i_mutex_key
#9
){+.+.}-{4:4}
, at: inode_lock include/linux/fs.h:818 [inline]
, at: __sock_release net/socket.c:639 [inline]
, at: sock_close+0x90/0x240 net/socket.c:1408
1 lock held by dhcpcd/6858:
 #0: 
ffff88807a743e08
 (
&sb->s_type->i_mutex_key
#9
){+.+.}-{4:4}
, at: inode_lock include/linux/fs.h:818 [inline]
, at: __sock_release net/socket.c:639 [inline]
, at: sock_close+0x90/0x240 net/socket.c:1408
1 lock held by syz-executor/6900:
 #0: 
ffff88805c1da0e0
 (&type->s_umount_key
#66