INFO: task kworker/0:14:18965 blocked for more than 143 seconds. Not tainted 6.5.0-rc6-syzkaller-00153-g78e0ea427754 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:14 state:D stack:22752 pid:18965 ppid:2 flags:0x00004000 Workqueue: events console_callback Call Trace: context_switch kernel/sched/core.c:5381 [inline] __schedule+0xc79/0x30a0 kernel/sched/core.c:6710 schedule+0xe7/0x1b0 kernel/sched/core.c:6786 schedule_timeout+0x27a/0x2c0 kernel/time/timer.c:2143 ___down_common kernel/locking/semaphore.c:225 [inline] __down_common+0x328/0x6c0 kernel/locking/semaphore.c:246 down+0x74/0xa0 kernel/locking/semaphore.c:63 console_lock+0x2c/0x80 kernel/printk/printk.c:2600 console_callback+0x63/0x4c0 drivers/tty/vt/vt.c:2934 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 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/12: #0: ffffffff87ea8330 (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/13: #0: ffffffff87ea8030 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x2c/0xe20 kernel/rcu/tasks.h:522 2 locks held by kworker/1:1/25: 1 lock held by khungtaskd/28: #0: ffffffff87ea8f40 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x340 kernel/locking/lockdep.c:6615 2 locks held by getty/2430: #0: ffff888102245098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243 #1: ffffc900000452f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfcb/0x1480 drivers/tty/n_tty.c:2187 5 locks held by kworker/1:4/5287: 6 locks held by kworker/0:8/11959: #0: ffff88810ce5c538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:20 [inline] #0: ffff88810ce5c538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: raw_atomic64_set include/linux/atomic/atomic-arch-fallback.h:2608 [inline] #0: ffff88810ce5c538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: raw_atomic_long_set include/linux/atomic/atomic-long.h:79 [inline] #0: ffff88810ce5c538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:3196 [inline] #0: ffff88810ce5c538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:678 [inline] #0: ffff88810ce5c538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:705 [inline] #0: ffff88810ce5c538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x96a/0x16f0 kernel/workqueue.c:2570 #1: ffffc90008097d80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x99e/0x16f0 kernel/workqueue.c:2574 #2: ffff888105f57190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:958 [inline] #2: ffff888105f57190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x4f30 drivers/usb/core/hub.c:5768 #3: ffff888105fc2500 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3138 [inline] #3: ffff888105fc2500 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5337 [inline] #3: ffff888105fc2500 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5580 [inline] #3: ffff888105fc2500 (&port_dev->status_lock){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5740 [inline] #3: ffff888105fc2500 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_event+0x28b4/0x4f30 drivers/usb/core/hub.c:5822 #4: ffff888104b08e68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5338 [inline] ffff888104b08e68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5580 [inline] ffff888104b08e68 (hcd->address0_mutex){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5740 [inline] ffff888104b08e68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_event+0x28da/0x4f30 drivers/usb/core/hub.c:5822 #5: ffff8881f663b218 (&rq->__lock){-.-.}-{2:2} , at: raw_spin_rq_lock_nested kernel/sched/core.c:558 [inline] , at: raw_spin_rq_lock kernel/sched/sched.h:1366 [inline] , at: rq_lock kernel/sched/sched.h:1675 [inline] , at: __schedule+0x290/0x30a0 kernel/sched/core.c:6627 2 locks held by kworker/0:14/18965: #0: ffff888100070d38 ((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: ffffc9000a7c7d80 (console_work){+.+.}-{0:0}, at: process_one_work+0x99e/0x16f0 kernel/workqueue.c:2574 5 locks held by kworker/0:3/22165: #0: ffff88810ce5c538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:20 [inline] #0: ffff88810ce5c538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: raw_atomic64_set include/linux/atomic/atomic-arch-fallback.h:2608 [inline] #0: ffff88810ce5c538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: raw_atomic_long_set include/linux/atomic/atomic-long.h:79 [inline] #0: ffff88810ce5c538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:3196 [inline] #0: ffff88810ce5c538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:678 [inline] #0: ffff88810ce5c538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:705 [inline] #0: ffff88810ce5c538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x96a/0x16f0 kernel/workqueue.c:2570 #1: ffffc9000dec7d80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x99e/0x16f0 kernel/workqueue.c:2574 #2: ffff888106397190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:958 [inline] #2: ffff888106397190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x4f30 drivers/usb/core/hub.c:5768 #3: ffff888106722500 (&port_dev->status_lock ){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3138 [inline] ){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5337 [inline] ){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5580 [inline] ){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5740 [inline] ){+.+.}-{3:3}, at: hub_event+0x28b4/0x4f30 drivers/usb/core/hub.c:5822 #4: ffff888104b24e68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5338 [inline] ffff888104b24e68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5580 [inline] ffff888104b24e68 (hcd->address0_mutex){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5740 [inline] ffff888104b24e68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_event+0x28da/0x4f30 drivers/usb/core/hub.c:5822 6 locks held by kworker/0:4/23961: #0: ffff88810ce5c538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:20 [inline] #0: ffff88810ce5c538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: raw_atomic64_set include/linux/atomic/atomic-arch-fallback.h:2608 [inline] #0: ffff88810ce5c538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: raw_atomic_long_set include/linux/atomic/atomic-long.h:79 [inline] #0: ffff88810ce5c538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:3196 [inline] #0: ffff88810ce5c538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:678 [inline] #0: ffff88810ce5c538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:705 [inline] #0: ffff88810ce5c538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x96a/0x16f0 kernel/workqueue.c:2570 #1: ffffc9000a777d80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x99e/0x16f0 kernel/workqueue.c:2574 #2: ffff888105fc7190 (&dev->mutex ){....}-{3:3}, at: device_lock include/linux/device.h:958 [inline] ){....}-{3:3}, at: hub_event+0x1be/0x4f30 drivers/usb/core/hub.c:5768 #3: ffff888105fe2500 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3138 [inline] #3: ffff888105fe2500 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5337 [inline] #3: ffff888105fe2500 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5580 [inline] #3: ffff888105fe2500 (&port_dev->status_lock){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5740 [inline] #3: ffff888105fe2500 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_event+0x28b4/0x4f30 drivers/usb/core/hub.c:5822 #4: ffff888104b18668 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5338 [inline] #4: ffff888104b18668 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5580 [inline] #4: ffff888104b18668 (hcd->address0_mutex){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5740 [inline] #4: ffff888104b18668 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_event+0x28da/0x4f30 drivers/usb/core/hub.c:5822 #5: ffffffff888d21f0 (ehci_cf_port_reset_rwsem ){.+.+}-{3:3}, at: hub_port_reset+0x1a4/0x1dc0 drivers/usb/core/hub.c:2953 3 locks held by kworker/0:9/24397: #0: ffff88810ce5c538 ((wq_completion)usb_hub_wq ){+.+.}-{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: ffffc9000d8c7d80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x99e/0x16f0 kernel/workqueue.c:2574 #2: ffff888105fe7190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:958 [inline] (&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x4f30 drivers/usb/core/hub.c:5768 1 lock held by syz-executor.3/25542: #0: ffffffff87eb43f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:293 [inline] #0: ffffffff87eb43f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x69e/0x7e0 kernel/rcu/tree_exp.h:992 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.5.0-rc6-syzkaller-00153-g78e0ea427754 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 nmi_cpu_backtrace+0x277/0x380 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x27b/0x2e0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline] watchdog+0xf29/0x11b0 kernel/hung_task.c:379 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 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 11004 Comm: kworker/0:0 Not tainted 6.5.0-rc6-syzkaller-00153-g78e0ea427754 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 Workqueue: events legacy_dvb_usb_read_remote_control RIP: 0010:check_preemption_disabled+0x8/0xe0 lib/smp_processor_id.c:14 Code: 65 8b 05 8b 46 c3 79 85 c0 75 0d 65 8b 05 9c 44 c3 79 85 c0 74 02 0f 0b e9 85 fc ff ff 0f 1f 44 00 00 41 54 55 53 48 83 ec 08 <65> 8b 1d cd 66 c4 79 65 8b 05 c2 66 c4 79 a9 ff ff ff 7f 74 0b 48 RSP: 0018:ffffc90000007da0 EFLAGS: 00000086 RAX: 0000000000000007 RBX: 1ffff92000000fbb RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8687a5a0 RDI: ffffffff86a59c00 RBP: 0000000000000046 R08: 0000000000000000 R09: fffffbfff12628ca R10: ffffffff89314657 R11: ffffc90000007ff8 R12: 0000000000000001 R13: 0000000000000000 R14: ffffffff87ed4588 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8881f6600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f242f628070 CR3: 000000013aa98000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lockdep_recursion_inc kernel/locking/lockdep.c:462 [inline] lock_acquire kernel/locking/lockdep.c:5760 [inline] lock_acquire+0x16f/0x510 kernel/locking/lockdep.c:5726 seqcount_lockdep_reader_access include/linux/seqlock.h:102 [inline] ktime_get_update_offsets_now+0x84/0x610 kernel/time/timekeeping.c:2317 hrtimer_update_base kernel/time/hrtimer.c:633 [inline] hrtimer_interrupt+0x142/0x800 kernel/time/hrtimer.c:1796 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1098 [inline] __sysvec_apic_timer_interrupt+0x14a/0x430 arch/x86/kernel/apic/apic.c:1115 sysvec_apic_timer_interrupt+0x89/0xb0 arch/x86/kernel/apic/apic.c:1109 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645 RIP: 0010:console_trylock_spinning kernel/printk/printk.c:1972 [inline] RIP: 0010:vprintk_emit+0x3f6/0x640 kernel/printk/printk.c:2306 Code: 00 00 e8 cd d8 1b 00 9c 8f 45 d0 48 8b 45 d0 31 ff 25 00 02 00 00 49 89 c6 48 89 c6 e8 43 d4 1b 00 4d 85 f6 0f 85 fa 01 00 00 0f 1e fa e8 a1 d8 1b 00 45 31 c9 41 b8 01 00 00 00 31 c9 68 16 RSP: 0018:ffffc9000dc37ab8 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 0000000000000017 RCX: 0000000000000000 RDX: ffff888134269d00 RSI: ffffffff8130750a RDI: 0000000000000007 RBP: ffffc9000dc37af0 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: 65725f783032396d R12: 0000000000000200 R13: ffff888104a55700 R14: 0000000000000001 R15: 0000000000000000 vprintk+0x89/0xa0 kernel/printk/printk_safe.c:50 _printk+0xc8/0x100 kernel/printk/printk.c:2328 m920x_read drivers/media/usb/dvb-usb/m920x.c:40 [inline] m920x_rc_query+0x496/0x760 drivers/media/usb/dvb-usb/m920x.c:193 legacy_dvb_usb_read_remote_control+0x107/0x4f0 drivers/media/usb/dvb-usb/dvb-usb-remote.c:123 process_one_work+0xaa2/0x16f0 kernel/workqueue.c:2600 process_scheduled_works kernel/workqueue.c:2667 [inline] worker_thread+0x896/0x1110 kernel/workqueue.c:2753 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