hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 INFO: task kworker/u4:1:23 blocked for more than 140 seconds. hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 Not tainted 4.19.211-syzkaller #0 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 kworker/u4:1 D26120 23 2 0x80000000 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 Workqueue: events_unbound fsnotify_connector_destroy_workfn hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 Call Trace: hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 schedule_timeout+0x92d/0xfe0 kernel/time/timer.c:1794 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 do_wait_for_common kernel/sched/completion.c:83 [inline] __wait_for_common kernel/sched/completion.c:104 [inline] wait_for_common+0x29c/0x470 kernel/sched/completion.c:115 __synchronize_srcu+0x124/0x210 kernel/rcu/srcutree.c:936 fsnotify_connector_destroy_workfn+0x49/0xa0 fs/notify/mark.c:174 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 INFO: task kworker/u4:2:33 blocked for more than 140 seconds. Not tainted 4.19.211-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/u4:2 D25792 33 2 0x80000000 Workqueue: events_unbound fsnotify_mark_destroy_workfn Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 schedule_timeout+0x92d/0xfe0 kernel/time/timer.c:1794 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 do_wait_for_common kernel/sched/completion.c:83 [inline] __wait_for_common kernel/sched/completion.c:104 [inline] wait_for_common+0x29c/0x470 kernel/sched/completion.c:115 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 __synchronize_srcu+0x124/0x210 kernel/rcu/srcutree.c:936 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 fsnotify_mark_destroy_workfn+0xfd/0x340 fs/notify/mark.c:795 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 kthread+0x33f/0x460 kernel/kthread.c:259 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 Showing all locks held in the system: hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 2 locks held by kworker/u4:1/23: hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 #0: 000000005bd9d23f ((wq_completion)"events_unbound"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 #1: 000000006b4c8878 (connector_reaper_work){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 2 locks held by kworker/u4:2/33: hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 #0: 000000005bd9d23f ((wq_completion)"events_unbound"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 #1: 00000000e993cd2e ((reaper_work).work){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 1 lock held by khungtaskd/1570: hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 #0: 000000001eeed884 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 6 locks held by kworker/1:3/9337: hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 1 lock held by syz-executor.5/13672: hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 #0: 00000000a4cca752 (rcu_sched_state.exp_mutex){+.+.}, at: exp_funnel_lock kernel/rcu/tree_exp.h:329 [inline] #0: 00000000a4cca752 (rcu_sched_state.exp_mutex){+.+.}, at: _synchronize_rcu_expedited+0x256/0x6f0 kernel/rcu/tree_exp.h:667 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 1 lock held by syz-executor.2/13704: hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 #0: 00000000af33f703 (rcu_preempt_state.exp_mutex){+.+.}, at: exp_funnel_lock kernel/rcu/tree_exp.h:297 [inline] #0: 00000000af33f703 (rcu_preempt_state.exp_mutex){+.+.}, at: _synchronize_rcu_expedited+0x4dc/0x6f0 kernel/rcu/tree_exp.h:667 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 1 lock held by syz-executor.1/13706: hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 #0: 00000000af33f703 (rcu_preempt_state.exp_mutex){+.+.}, at: exp_funnel_lock kernel/rcu/tree_exp.h:329 [inline] #0: 00000000af33f703 (rcu_preempt_state.exp_mutex){+.+.}, at: _synchronize_rcu_expedited+0x256/0x6f0 kernel/rcu/tree_exp.h:667 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 1 lock held by syz-executor.2/14486: hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 #0: 000000006674c401 (rtnl_mutex){+.+.}, at: rtnl_lock net/core/rtnetlink.c:77 [inline] #0: 000000006674c401 (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x3fe/0xb80 net/core/rtnetlink.c:4779 1 lock held by syz-executor.1/14487: hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 #0: 000000006674c401 (rtnl_mutex){+.+.}, at: rtnl_lock net/core/rtnetlink.c:77 [inline] #0: 000000006674c401 (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x3fe/0xb80 net/core/rtnetlink.c:4779 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 1 lock held by syz-executor.3/14492: hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 #0: 000000006674c401 (rtnl_mutex){+.+.}, at: rtnl_lock net/core/rtnetlink.c:77 [inline] #0: 000000006674c401 (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x3fe/0xb80 net/core/rtnetlink.c:4779 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 1 lock held by syz-executor.5/14493: hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 #0: 000000006674c401 (rtnl_mutex){+.+.}, at: rtnl_lock net/core/rtnetlink.c:77 [inline] #0: 000000006674c401 (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x3fe/0xb80 net/core/rtnetlink.c:4779 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 ============================================= NMI backtrace for cpu 0 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 CPU: 0 PID: 1570 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0x991/0xe60 kernel/hung_task.c:287 hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 0 to CPUs 1: hid-generic 0009:0000:FFFFFFC0.0015: unknown main item tag 0x0 NMI backtrace for cpu 1 CPU: 1 PID: 9337 Comm: kworker/1:3 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022 Workqueue: events uhid_device_add_worker RIP: 0010:native_apic_mem_write+0x8/0x10 arch/x86/include/asm/apic.h:109 Code: 3d cc 17 3d 0b 01 7f 02 5d c3 89 ef 5d e9 f5 fe c9 06 48 c7 c7 00 97 65 8c e8 84 e2 6f 00 eb df 66 90 89 ff 89 b7 00 c0 5f ff 0f 1f 80 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 53 89 fb 48 RSP: 0000:ffff8880ba107e98 EFLAGS: 00000046 RAX: dffffc0000000000 RBX: ffffffff89cfb1a0 RCX: 0000000000000020 RDX: 1ffffffff139f636 RSI: 00000000000870f6 RDI: 0000000000000380 RBP: ffff8880ba11e2c0 R08: ffffffff8c665058 R09: 0000000000000000 R10: 0000000000000007 R11: ffffffff8c66505b R12: 00000000000870f6 R13: 0000000000000000 R14: ffff8880ba124cc0 R15: ffff8880ba124d30 FS: 0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f611c6ca000 CR3: 00000000a1566000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: apic_write arch/x86/include/asm/apic.h:389 [inline] lapic_next_event+0x4d/0x80 arch/x86/kernel/apic/apic.c:460 clockevents_program_event+0x234/0x350 kernel/time/clockevents.c:344 tick_program_event+0xac/0x140 kernel/time/tick-oneshot.c:48 hrtimer_interrupt+0x40a/0x9e0 kernel/time/hrtimer.c:1598 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1071 [inline] smp_apic_timer_interrupt+0x10c/0x550 arch/x86/kernel/apic/apic.c:1096 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline] RIP: 0010:console_trylock_spinning kernel/printk/printk.c:1724 [inline] RIP: 0010:vprintk_emit+0x668/0x740 kernel/printk/printk.c:1964 Code: 48 b8 00 00 00 00 00 fc ff df 41 80 7c 05 00 00 0f 85 d9 00 00 00 48 83 3d 9c a2 a3 08 00 74 37 e8 7d a5 14 00 48 89 df 57 9d <0f> 1f 44 00 00 e9 82 fe ff ff e8 69 a5 14 00 0f 0b e8 62 a5 14 00 RSP: 0000:ffff88808f4b7410 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff8880a5b40440 RBX: 0000000000000293 RCX: 1ffff11014b681a2 RDX: 0000000000000000 RSI: ffffffff814ddff3 RDI: 0000000000000293 RBP: ffff88808f4b7450 R08: ffffffff8cd4d2d8 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 000000000000003e R13: 1ffffffff13e3051 R14: 0000000000000200 R15: 0000000000000001 dev_vprintk_emit+0x2e3/0x640 drivers/base/core.c:3264 dev_printk_emit+0xbb/0xf0 drivers/base/core.c:3275 __dev_printk+0x108/0x260 drivers/base/core.c:3287 _dev_warn+0xd8/0x110 drivers/base/core.c:3331 hid_parser_main+0x65d/0xb60 drivers/hid/hid-core.c:629 hid_open_report+0x355/0x6e0 drivers/hid/hid-core.c:1089 hid_parse include/linux/hid.h:1032 [inline] hid_generic_probe+0x4a/0x90 drivers/hid/hid-generic.c:66 hid_device_probe+0x29e/0x3d0 drivers/hid/hid-core.c:2105 really_probe+0x622/0xbd0 drivers/base/dd.c:506 driver_probe_device+0x218/0x340 drivers/base/dd.c:667 __device_attach_driver+0x29e/0x370 drivers/base/dd.c:754 bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:464 __device_attach+0x226/0x470 drivers/base/dd.c:822 bus_probe_device+0x1ea/0x2a0 drivers/base/bus.c:524 device_add+0xb37/0x16d0 drivers/base/core.c:2170 hid_add_device+0x344/0x9e0 drivers/hid/hid-core.c:2257 uhid_device_add_worker+0x3a/0x150 drivers/hid/uhid.c:65 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415