INFO: task kworker/1:0:25 blocked for more than 144 seconds. Not tainted 6.14.0-rc2-syzkaller-ga64dcfb451e2 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:0 state:D stack:0 pid:25 tgid:25 ppid:2 task_flags:0x4208060 flags:0x00000008 Workqueue: events p9_write_work Call trace: __switch_to+0x414/0x788 arch/arm64/kernel/process.c:701 (T) context_switch kernel/sched/core.c:5377 [inline] __schedule+0x1360/0x257c kernel/sched/core.c:6764 __schedule_loop kernel/sched/core.c:6841 [inline] schedule+0xbc/0x238 kernel/sched/core.c:6856 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6913 __mutex_lock_common+0xd30/0x24b8 kernel/locking/mutex.c:662 __mutex_lock kernel/locking/mutex.c:730 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:782 pipe_write+0x184/0x1880 fs/pipe.c:456 __kernel_write_iter+0x340/0x7a0 fs/read_write.c:612 __kernel_write fs/read_write.c:632 [inline] kernel_write+0x1cc/0x2d0 fs/read_write.c:653 p9_fd_write net/9p/trans_fd.c:432 [inline] p9_write_work+0x45c/0xc1c net/9p/trans_fd.c:483 process_one_work+0x810/0x1638 kernel/workqueue.c:3236 process_scheduled_works kernel/workqueue.c:3317 [inline] worker_thread+0x97c/0xeec kernel/workqueue.c:3398 kthread+0x65c/0x7b0 kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862 Showing all locks held in the system: 3 locks held by kworker/1:0/25: #0: ffff0000c0028d48 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x674/0x1638 kernel/workqueue.c:3210 #1: ffff800097e07ba0 ((work_completion)(&m->wq)){+.+.}-{0:0}, at: process_one_work+0x708/0x1638 kernel/workqueue.c:3210 #2: ffff0000cc66b868 (&pipe->mutex){+.+.}-{4:4}, at: pipe_write+0x184/0x1880 fs/pipe.c:456 1 lock held by khungtaskd/31: #0: ffff80008fd92220 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:336 5 locks held by kworker/u8:2/38: 3 locks held by kworker/u8:4/303: #0: ffff0001b37a5758 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:598 [inline] #0: ffff0001b37a5758 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1521 [inline] #0: ffff0001b37a5758 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1852 [inline] #0: ffff0001b37a5758 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x2e0/0x257c kernel/sched/core.c:6687 #1: ffff0001b3790408 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x394/0x5e8 kernel/sched/psi.c:987 #2: ffff0001b3791e58 (&base->lock){-.-.}-{2:2}, at: lock_timer_base kernel/time/timer.c:1046 [inline] #2: ffff0001b3791e58 (&base->lock){-.-.}-{2:2}, at: __mod_timer+0x20c/0xdc4 kernel/time/timer.c:1127 2 locks held by getty/6202: #0: ffff0000ccc6e0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009bc8e2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x41c/0x1228 drivers/tty/n_tty.c:2211 1 lock held by syz-executor/6442: #0: ffff0000f12800e0 (&type->s_umount_key#56){+.+.}-{4:4}, at: __super_lock fs/super.c:56 [inline] #0: ffff0000f12800e0 (&type->s_umount_key#56){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff0000f12800e0 (&type->s_umount_key#56){+.+.}-{4:4}, at: deactivate_super+0xd8/0x100 fs/super.c:505 6 locks held by kworker/0:6/6533: #0: ffff0000c2bb5948 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x674/0x1638 kernel/workqueue.c:3210 #1: ffff8000a3847ba0 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x708/0x1638 kernel/workqueue.c:3210 #2: ffff0000cd898190 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1030 [inline] #2: ffff0000cd898190 (&dev->mutex){....}-{4:4}, at: hub_event+0x1bc/0x4280 drivers/usb/core/hub.c:5851 #3: ffff0000cd89b520 (&port_dev->status_lock){+.+.}-{4:4}, at: usb_lock_port drivers/usb/core/hub.c:3209 [inline] #3: ffff0000cd89b520 (&port_dev->status_lock){+.+.}-{4:4}, at: hub_port_connect drivers/usb/core/hub.c:5420 [inline] #3: ffff0000cd89b520 (&port_dev->status_lock){+.+.}-{4:4}, at: hub_port_connect_change drivers/usb/core/hub.c:5663 [inline] #3: ffff0000cd89b520 (&port_dev->status_lock){+.+.}-{4:4}, at: port_event drivers/usb/core/hub.c:5823 [inline] #3: ffff0000cd89b520 (&port_dev->status_lock){+.+.}-{4:4}, at: hub_event+0x1e58/0x4280 drivers/usb/core/hub.c:5905 #4: ffff0000ccedd368 (hcd->address0_mutex){+.+.}-{4:4}, at: hub_port_connect drivers/usb/core/hub.c:5421 [inline] #4: ffff0000ccedd368 (hcd->address0_mutex){+.+.}-{4:4}, at: hub_port_connect_change drivers/usb/core/hub.c:5663 [inline] #4: ffff0000ccedd368 (hcd->address0_mutex){+.+.}-{4:4}, at: port_event drivers/usb/core/hub.c:5823 [inline] #4: ffff0000ccedd368 (hcd->address0_mutex){+.+.}-{4:4}, at: hub_event+0x1e7c/0x4280 drivers/usb/core/hub.c:5905 #5: ffff800091cd3c50 (ehci_cf_port_reset_rwsem){.+.+}-{4:4}, at: hub_port_reset+0x190/0x15c8 drivers/usb/core/hub.c:3024 2 locks held by syz.3.845/8688: #0: ffff0000cc66b868 (&pipe->mutex){+.+.}-{4:4}, at: pipe_write+0x184/0x1880 fs/pipe.c:456 #1: ffff0000c14a82e8 (mapping.invalidate_lock#5){.+.+}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:932 [inline] #1: ffff0000c14a82e8 (mapping.invalidate_lock#5){.+.+}-{4:4}, at: page_cache_ra_unbounded+0x100/0x758 mm/readahead.c:229 1 lock held by syz.1.1773/11556: 1 lock held by syz.2.1786/11592: =============================================