INFO: task kworker/u4:3:47 blocked for more than 143 seconds.
      Not tainted 6.5.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:3    state:D
 stack:25344 pid:47    ppid:2      flags:0x00004000
Workqueue: writeback wb_workfn
 (flush-7:4)

Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5381 [inline]
 __schedule+0xee1/0x59f0 kernel/sched/core.c:6710
 schedule+0xe7/0x1b0 kernel/sched/core.c:6786
 schedule_timeout+0x27a/0x2c0 kernel/time/timer.c:2143
 do_wait_for_common kernel/sched/completion.c:85 [inline]
 __wait_for_common+0x3e2/0x5f0 kernel/sched/completion.c:106
 f2fs_issue_checkpoint+0x396/0x4a0 fs/f2fs/checkpoint.c:1880
 f2fs_sync_fs+0x2f7/0x3a0 fs/f2fs/super.c:1709
 f2fs_balance_fs_bg+0xcce/0xfc0 fs/f2fs/segment.c:513
 f2fs_write_node_pages+0x176/0x7b0 fs/f2fs/node.c:2117
 do_writepages+0x1b4/0x690 mm/page-writeback.c:2553
 __writeback_single_inode+0x158/0xe70 fs/fs-writeback.c:1603
 writeback_sb_inodes+0x599/0x1010 fs/fs-writeback.c:1894
 __writeback_inodes_wb+0xff/0x2d0 fs/fs-writeback.c:1965
 wb_writeback+0x7f8/0xa90 fs/fs-writeback.c:2072
 wb_check_old_data_flush fs/fs-writeback.c:2176 [inline]
 wb_do_writeback fs/fs-writeback.c:2229 [inline]
 wb_workfn+0xa02/0xfd0 fs/fs-writeback.c:2257
 process_one_work+0xaa2/0x16f0 kernel/workqueue.c:2600
 worker_thread+0x687/0x1110 kernel/workqueue.c:2751
 kthread+0x33a/0x430 kernel/kthread.c:389
 ret_from_fork+0x2c/0x70 arch/x86/kernel/process.c:145
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
 </TASK>
INFO: task f2fs_ckpt-7:4:5585 blocked for more than 147 seconds.
      Not tainted 6.5.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:f2fs_ckpt-7:4   state:D
 stack:28976 pid:5585  ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5381 [inline]
 __schedule+0xee1/0x59f0 kernel/sched/core.c:6710
 schedule+0xe7/0x1b0 kernel/sched/core.c:6786
 issue_checkpoint_thread+0x1cd/0x2a0 fs/f2fs/checkpoint.c:1817
 kthread+0x33a/0x430 kernel/kthread.c:389
 ret_from_fork+0x2c/0x70 arch/x86/kernel/process.c:145
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
 </TASK>

Showing all locks held in the system:
3 locks held by kworker/0:1/9:
 #0: 
ffff888012870d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:20 [inline]
ffff888012870d38 ((wq_completion)events){+.+.}-{0:0}, at: raw_atomic64_set include/linux/atomic/atomic-arch-fallback.h:2608 [inline]
ffff888012870d38 ((wq_completion)events){+.+.}-{0:0}, at: raw_atomic_long_set include/linux/atomic/atomic-long.h:79 [inline]
ffff888012870d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:3196 [inline]
ffff888012870d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:678 [inline]
ffff888012870d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:705 [inline]
ffff888012870d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x96a/0x16f0 kernel/workqueue.c:2570
 #1: 
ffffc900000e7d80
 (
(linkwatch_work).work
){+.+.}-{0:0}
, at: process_one_work+0x99e/0x16f0 kernel/workqueue.c:2574
 #2: 
ffffffff8e3e0f68
 (rtnl_mutex
){+.+.}-{3:3}
, at: linkwatch_event+0x51/0xc0 net/core/link_watch.c:277
3 locks held by kworker/u4:0/10:
 #0: 
ffff888019e68938
 (
(wq_completion)writeback
){+.+.}-{0:0}
, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:20 [inline]
, at: raw_atomic64_set include/linux/atomic/atomic-arch-fallback.h:2608 [inline]
, at: raw_atomic_long_set include/linux/atomic/atomic-long.h:79 [inline]
, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:3196 [inline]
, at: set_work_data kernel/workqueue.c:678 [inline]
, at: set_work_pool_and_clear_pending kernel/workqueue.c:705 [inline]
, at: process_one_work+0x96a/0x16f0 kernel/workqueue.c:2570
 #1: 
ffffc900000f7d80
 (
(work_completion)(&(&wb->dwork)->work)
){+.+.}-{0:0}
, at: process_one_work+0x99e/0x16f0 kernel/workqueue.c:2574
 #2: 
ffff88805c40a0e0
 (
&type->s_umount_key
#50
){++++}-{3:3}
, at: trylock_super+0x1c/0x100 fs/super.c:413
1 lock held by rcu_tasks_kthre/13:
 #0: 
ffffffff8c9a67f0
 (
rcu_tasks.tasks_gp_mutex
){+.+.}-{3:3}
, at: rcu_tasks_one_gp+0x2c/0xe20 kernel/rcu/tasks.h:522
1 lock held by rcu_tasks_trace/14:
 #0: 
ffffffff8c9a64f0
 (
rcu_tasks_trace.tasks_gp_mutex
){+.+.}-{3:3}
, at: rcu_tasks_one_gp+0x2c/0xe20 kernel/rcu/tasks.h:522
1 lock held by khungtaskd/27:
 #0: ffffffff8c9a7400
 (
rcu_read_lock
){....}-{1:2}
, at: debug_show_all_locks+0x55/0x340 kernel/locking/lockdep.c:6615
3 locks held by kworker/u4:4/57:
 #0: 
ffff888019e68938
 (
(wq_completion)writeback
){+.+.}-{0:0}
, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:20 [inline]
, at: raw_atomic64_set include/linux/atomic/atomic-arch-fallback.h:2608 [inline]
, at: raw_atomic_long_set include/linux/atomic/atomic-long.h:79 [inline]
, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:3196 [inline]
, at: set_work_data kernel/workqueue.c:678 [inline]
, at: set_work_pool_and_clear_pending kernel/workqueue.c:705 [inline]
, at: process_one_work+0x96a/0x16f0 kernel/workqueue.c:2570
 #1: ffffc90001587d80
 (
(work_completion)(&(&wb->dwork)->work)
){+.+.}-{0:0}
, at: process_one_work+0x99e/0x16f0 kernel/workqueue.c:2574
 #2: ffff88806c1bc0e0
 (
&type->s_umount_key
#50
){++++}-{3:3}, at: trylock_super+0x1c/0x100 fs/super.c:413
2 locks held by kworker/0:2/915:
 #0: 
ffff888012872538
 (
(wq_completion)rcu_gp
){+.+.}-{0:0}
, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:20 [inline]
, at: raw_atomic64_set include/linux/atomic/atomic-arch-fallback.h:2608 [inline]
, at: raw_atomic_long_set include/linux/atomic/atomic-long.h:79 [inline]
, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:3196 [inline]
, at: set_work_data kernel/workqueue.c:678 [inline]
, at: set_work_pool_and_clear_pending kernel/workqueue.c:705 [inline]
, at: process_one_work+0x96a/0x16f0 kernel/workqueue.c:2570
 #1: 
ffffc9000539fd80
 (
(work_completion)(&rew->rew_work)
){+.+.}-{0:0}
, at: process_one_work+0x99e/0x16f0 kernel/workqueue.c:2574
5 locks held by kworker/u4:5/2500:
1 lock held by klogd/4464:
 #0: 
ffff8880b993c3d8
 (
&rq->__lock
){-.-.}-{2:2}
, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:558
2 locks held by getty/4775:
 #0: 
ffff888028a72098
 (
&tty->ldisc_sem
){++++}-{0:0}
, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
 #1: 
ffffc900015a02f0
 (
&ldata->atomic_read_lock
){+.+.}-{3:3}
, at: n_tty_read+0xfcb/0x1480 drivers/tty/n_tty.c:2187
2 locks held by kworker/1:5/5035:
 #0: 
ffff888012870d38
 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:20 [inline]
 ((wq_completion)events){+.+.}-{0:0}, at: raw_atomic64_set include/linux/atomic/atomic-arch-fallback.h:2608 [inline]
 ((wq_completion)events){+.+.}-{0:0}, at: raw_atomic_long_set include/linux/atomic/atomic-long.h:79 [inline]
 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:3196 [inline]
 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:678 [inline]
 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:705 [inline]
 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x96a/0x16f0 kernel/workqueue.c:2570
 #1: ffffc9000463fd80 (free_ipc_work){+.+.}-{0:0}, at: process_one_work+0x99e/0x16f0 kernel/workqueue.c:2574
3 locks held by kworker/0:8/5517:
 #0: ffff888012870d38
 (
(wq_completion)events
){+.+.}-{0:0}
, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:20 [inline]
, at: raw_atomic64_set include/linux/atomic/atomic-arch-fallback.h:2608 [inline]
, at: raw_atomic_long_set include/linux/atomic/atomic-long.h:79 [inline]
, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:3196 [inline]
, at: set_work_data kernel/workqueue.c:678 [inline]
, at: set_work_pool_and_clear_pending kernel/workqueue.c:705 [inline]
, at: process_one_work+0x96a/0x16f0 kernel/workqueue.c:2570
 #1: 
ffffc90009df7d80
 (
(work_completion)(&pwq->unbound_release_work)
){+.+.}-{0:0}
, at: process_one_work+0x99e/0x16f0 kernel/workqueue.c:2574
 #2: 
ffffffff8c9b28b8
 (
rcu_state.exp_mutex
){+.+.}-{3:3}
, at: exp_funnel_lock kernel/rcu/tree_exp.h:325 [inline]
, at: synchronize_rcu_expedited+0x404/0x7e0 kernel/rcu/tree_exp.h:992
3 locks held by syz-executor.4/5551:
 #0: ffff8880701010b8
 (
&hdev->req_lock
){+.+.}-{3:3}
, at: hci_dev_do_close+0x26/0x70 net/bluetooth/hci_core.c:552
 #1: ffff888070100078
 (
&hdev->lock
){+.+.}-{3:3}
, at: hci_dev_close_sync+0x345/0x10e0 net/bluetooth/hci_sync.c:5026
 #2: 
ffffffff8e638d48
 (
hci_cb_list_lock
){+.+.}-{3:3}
, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:1836 [inline]
, at: hci_conn_hash_flush+0xc4/0x230 net/bluetooth/hci_conn.c:2517
2 locks held by syz-executor.1/5913:
2 locks held by f2fs_ckpt-7:1/5914:
 #0: 
ffff88802b8dd2a8
 (
&sbi->gc_lock
){+.+.}-{3:3}
, at: f2fs_down_write fs/f2fs/f2fs.h:2133 [inline]
, at: __write_checkpoint_sync fs/f2fs/checkpoint.c:1764 [inline]
, at: __checkpoint_and_complete_reqs+0xdc/0x350 fs/f2fs/checkpoint.c:1784
 #1: