warning: checkpointing journal with EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT can be slow INFO: task kworker/u4:5:307 blocked for more than 143 seconds. Not tainted 6.3.0-rc5-next-20230406 #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u4:5 state:D stack:25096 pid:307 ppid:2 flags:0x00004000 Workqueue: events_unbound io_ring_exit_work Call Trace: __schedule+0x98d/0x2a00 schedule+0xdb/0x1a0 schedule_timeout+0x3b0/0x400 __wait_for_common+0x1d3/0x550 io_ring_exit_work+0x49b/0x13f0 process_one_work+0xa20/0x1660 worker_thread+0x64f/0x12a0 kthread+0x33f/0x440 ret_from_fork+0x2c/0x50 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/12: #0: ffffffff8560a330 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd30 1 lock held by khungtaskd/25: #0: ffffffff8560af00 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x340 1 lock held by systemd-journal/87: 1 lock held by in:imklog/163: #0: ffff88800e85e0e8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xeb/0x110 2 locks held by kworker/u4:5/307: #0: ffff888008471138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x91e/0x1660 #1: ffff8880162cfdb0 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x952/0x1660 2 locks held by agetty/7148: #0: ffff888046620098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x90 #1: ffff888046620130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: file_tty_write.constprop.0+0x251/0x9d0 2 locks held by syz-executor.7/7912: =============================================