INFO: task kworker/u4:1:21756 blocked for more than 430 seconds.
      Not tainted 6.4.0-rc1-syzkaller-00012-gb104dbedbe61 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:1    state:D stack:0     pid:21756 ppid:2      flags:0x00000000
Workqueue: events_unbound io_ring_exit_work
Call Trace:
[<ffffffff83525b7e>] context_switch kernel/sched/core.c:5343 [inline]
[<ffffffff83525b7e>] __schedule+0x682/0x16aa kernel/sched/core.c:6669
[<ffffffff83526c20>] schedule+0x7a/0x100 kernel/sched/core.c:6745
[<ffffffff83530052>] schedule_timeout+0x1ae/0x20a kernel/time/timer.c:2143
[<ffffffff83527cfa>] do_wait_for_common kernel/sched/completion.c:85 [inline]
[<ffffffff83527cfa>] __wait_for_common+0x186/0x308 kernel/sched/completion.c:106
[<ffffffff83527e96>] wait_for_common kernel/sched/completion.c:117 [inline]
[<ffffffff83527e96>] wait_for_completion+0x1a/0x22 kernel/sched/completion.c:138
[<ffffffff834ea67a>] io_ring_exit_work+0x4a4/0x9b4 io_uring/io_uring.c:3077
[<ffffffff800aacd0>] process_one_work+0x634/0xdb2 kernel/workqueue.c:2405
[<ffffffff800ab7b0>] worker_thread+0x362/0x880 kernel/workqueue.c:2552
[<ffffffff800bfec8>] kthread+0x1be/0x22e kernel/kthread.c:379
[<ffffffff80006362>] ret_from_fork+0xa/0x1c arch/riscv/kernel/entry.S:264

Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/13:
 #0: ffffffff8517d090 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x34/0x712 kernel/rcu/tasks.h:518
1 lock held by rcu_tasks_trace/14:
 #0: ffffffff8517cdf0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x34/0x712 kernel/rcu/tasks.h:518
1 lock held by khungtaskd/28:
 #0: ffffffff8517d360 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x40/0x1f6 kernel/locking/lockdep.c:6547
2 locks held by getty/2833:
 #0: ff6000001469d098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3a/0x46 drivers/tty/tty_ldsem.c:340
 #1: ff2000000027b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xb9c/0xd0c drivers/tty/n_tty.c:2176
2 locks held by kworker/u4:1/21756:
 #0: ff60000008429138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:642 [inline]
 #0: ff60000008429138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:670 [inline]
 #0: ff60000008429138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x50e/0xdb2 kernel/workqueue.c:2376
 #1: ff20000002d47cf0 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:642 [inline]
 #1: ff20000002d47cf0 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:670 [inline]
 #1: ff20000002d47cf0 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x50e/0xdb2 kernel/workqueue.c:2376
2 locks held by syz-executor.0/27643:
2 locks held by syz-executor.0/27660:
4 locks held by syz-executor.1/28436:

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