INFO: task syz.9.64:7035 blocked for more than 147 seconds.
      Not tainted 6.12.0-rc6-syzkaller-g46f782153ea2 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.9.64        state:D stack:0     pid:7035  tgid:7034  ppid:6821   flags:0x0000000d
Call trace:
 __switch_to+0x428/0x860 arch/arm64/kernel/process.c:701 (T)
 context_switch kernel/sched/core.c:5328 [inline]
 __schedule+0x16e0/0x27d0 kernel/sched/core.c:6690
 __schedule_loop kernel/sched/core.c:6767 [inline]
 schedule+0xbc/0x238 kernel/sched/core.c:6782
 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6839
 __mutex_lock_common+0xbd8/0x21a0 kernel/locking/mutex.c:684
 __mutex_lock kernel/locking/mutex.c:752 [inline]
 mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:804
 exfat_sync_fs+0xa0/0x140 fs/exfat/super.c:56
 sync_fs_one_sb+0xd8/0x120 fs/sync.c:84
 iterate_supers+0xd8/0x4dc fs/super.c:934
 ksys_sync+0xd4/0x1cc fs/sync.c:104
 __arm64_sys_sync+0x14/0x24 fs/sync.c:113
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744
 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600

Showing all locks held in the system:
5 locks held by kworker/u8:0/11:
 #0: ffff0000c1891948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x628/0x1600 kernel/workqueue.c:3203
 #1: ffff8000978d7c20 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x6bc/0x1600 kernel/workqueue.c:3203
 #2: ffff800092718190 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x13c/0x9b4 net/core/net_namespace.c:580
 #3: ffff0000f5451428 (&wg->device_update_lock){+.+.}-{3:3}, at: wg_destruct+0x11c/0x2c0 drivers/net/wireguard/device.c:249
 #4: ffff80008f9f5b80 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x58/0x534 kernel/rcu/tree.c:4562
1 lock held by khungtaskd/31:
 #0: ffff80008f9f0760 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:336
2 locks held by getty/6190:
 #0: ffff0000d2df30a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
 #1: ffff80009b84b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x41c/0x1228 drivers/tty/n_tty.c:2211
3 locks held by syz-executor/6427:
3 locks held by syz-executor/6746:
3 locks held by syz-executor/6955:
2 locks held by syz.9.64/7035:
 #0: ffff0000d2f560e0 (&type->s_umount_key#63){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
 #0: ffff0000d2f560e0 (&type->s_umount_key#63){++++}-{3:3}, at: super_lock+0x244/0x33c fs/super.c:120
 #1: ffff0000d5bde0e8 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_sync_fs+0xa0/0x140 fs/exfat/super.c:56
2 locks held by kworker/u8:11/7205:
1 lock held by syz-executor/7334:
 #0: ffff8000927246a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79
2 locks held by syz-executor/7335:
 #0: ffff0000d8af8d80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close net/bluetooth/hci_core.c:481 [inline]
 #0: ffff0000d8af8d80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_unregister_dev+0x1f0/0x4b8 net/bluetooth/hci_core.c:2698
 #1: ffff0000d8af8078 (&hdev->lock){+.+.}-{3:3}, at: hci_dev_close_sync+0x47c/0x10c0 net/bluetooth/hci_sync.c:5193
1 lock held by syz-executor/7342:
 #0: ffff8000927246a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
 #0: ffff8000927246a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x5e8/0xa9c net/core/rtnetlink.c:6672
1 lock held by syz-executor/7361:
2 locks held by syz-executor/7364:
 #0: ffff800092718190 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x290/0x4ac net/core/net_namespace.c:490
 #1: ffff8000927246a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:79

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