INFO: task syz.8.1039:7514 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.8.1039 state:D stack:0 pid:7514 ppid:6580 flags:0x00000848 Call trace: __switch_to+0x2f4/0x550 arch/arm64/kernel/process.c:555 context_switch kernel/sched/core.c:5246 [inline] __schedule+0xdb4/0x1a6c kernel/sched/core.c:6563 schedule+0xc4/0x170 kernel/sched/core.c:6639 schedule_timeout+0xc8/0x2f4 kernel/time/timer.c:2144 do_wait_for_common+0x28c/0x3ec kernel/sched/completion.c:85 __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x44/0x5c kernel/sched/completion.c:138 io_wq_exit_workers io_uring/io-wq.c:1291 [inline] io_wq_put_and_exit+0x39c/0x8d4 io_uring/io-wq.c:1326 io_uring_clean_tctx+0x108/0x17c io_uring/tctx.c:204 io_uring_cancel_generic+0x4a8/0x590 io_uring/io_uring.c:3168 __io_uring_cancel+0x28/0x38 io_uring/io_uring.c:3183 io_uring_files_cancel include/linux/io_uring.h:54 [inline] do_exit+0x220/0x19ac kernel/exit.c:833 do_group_exit+0x198/0x238 kernel/exit.c:1030 get_signal+0x11f4/0x133c kernel/signal.c:2884 do_signal arch/arm64/kernel/signal.c:1095 [inline] do_notify_resume+0x364/0x2c84 arch/arm64/kernel/signal.c:1148 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline] el0_svc+0x9c/0x12c arch/arm64/kernel/entry-common.c:638 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/12: #0: ffff8000165f7e70 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x40/0xc48 kernel/rcu/tasks.h:517 1 lock held by rcu_tasks_trace/13: #0: ffff8000165f8690 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x40/0xc48 kernel/rcu/tasks.h:517 3 locks held by kworker/1:1/24: #0: ffff0000c0020938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x69c/0x13bc kernel/workqueue.c:-1 #1: ffff80001dcf7c40 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x6e8/0x13bc kernel/workqueue.c:2267 #2: ffff0000f2488240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x1d8/0x2708 drivers/net/netdevsim/fib.c:1491 1 lock held by khungtaskd/28: #0: ffff8000165f7500 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:349 2 locks held by getty/4083: #0: ffff0000d7741098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff800021b3e2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x2e8/0xfa8 drivers/tty/n_tty.c:2198 1 lock held by iou-wrk-7514/7515: #0: ffff800016645ac8 (event_mutex){+.+.}-{3:3}, at: event_filter_write+0x88/0x154 kernel/trace/trace_events.c:1875 2 locks held by syz.3.3375/14261: 2 locks held by syz.3.3406/14296: 1 lock held by syz.9.3418/14333: 2 locks held by syz.0.3421/14356: 4 locks held by dhcpcd/14379: #0: ffff0000fc0e2130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1805 [inline] #0: ffff0000fc0e2130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x48/0xaf4 net/packet/af_packet.c:3285 #1: ffff00019e0d7398 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:538 [inline] #1: ffff00019e0d7398 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1362 [inline] #1: ffff00019e0d7398 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1652 [inline] #1: ffff00019e0d7398 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x2bc/0x1a6c kernel/sched/core.c:6479 #2: ffff00019e0c3bc8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x35c/0x5b8 kernel/sched/psi.c:999 #3: ffff0000c09407f0 (&memcg->move_lock){-.-.}-{2:2}, at: folio_memcg_lock+0xa8/0x1f8 mm/memcontrol.c:2111 1 lock held by dhcpcd/14380: #0: ffff0000fc0e0130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1805 [inline] #0: ffff0000fc0e0130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x48/0xaf4 net/packet/af_packet.c:3285 2 locks held by dhcpcd-run-hook/14381: =============================================