hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 INFO: task kworker/u4:10:12853 blocked for more than 140 seconds. Not tainted 4.19.211-syzkaller #0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 kworker/u4:10 D25496 12853 2 0x80000000 Workqueue: events_unbound fsnotify_connector_destroy_workfn hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 schedule_timeout+0x92d/0xfe0 kernel/time/timer.c:1794 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: 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 0000:0000:0000.0005: unknown main item tag 0x0 __synchronize_srcu+0x124/0x210 kernel/rcu/srcutree.c:936 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 fsnotify_connector_destroy_workfn+0x49/0xa0 fs/notify/mark.c:174 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 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/u4:12:10790 blocked for more than 140 seconds. hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 Not tainted 4.19.211-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/u4:12 D26280 10790 2 0x80000000 Workqueue: events_unbound fsnotify_mark_destroy_workfn hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 schedule_timeout+0x92d/0xfe0 kernel/time/timer.c:1794 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: 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 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 __synchronize_srcu+0x124/0x210 kernel/rcu/srcutree.c:936 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 fsnotify_mark_destroy_workfn+0xfd/0x340 fs/notify/mark.c:795 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 kthread+0x33f/0x460 kernel/kthread.c:259 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 INFO: task syz-executor.3:15940 blocked for more than 140 seconds. Not tainted 4.19.211-syzkaller #0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D28624 15940 8113 0x00000004 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 schedule_timeout+0x92d/0xfe0 kernel/time/timer.c:1794 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: 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 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 __flush_work+0x4bb/0x8b0 kernel/workqueue.c:2926 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 __cancel_work_timer+0x412/0x590 kernel/workqueue.c:3013 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 uhid_dev_destroy drivers/hid/uhid.c:568 [inline] uhid_char_release+0xa7/0x190 drivers/hid/uhid.c:645 __fput+0x2ce/0x890 fs/file_table.c:278 task_work_run+0x148/0x1c0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:193 [inline] exit_to_usermode_loop+0x251/0x2a0 arch/x86/entry/common.c:167 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 RIP: 0033:0x7f285f59d67b Code: Bad RIP value. RSP: 002b:00007ffca9268bd0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007f285f59d67b RDX: 00007f285f6f23c0 RSI: ffffffff8167abaa RDI: 0000000000000003 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000001b2ec20acc R10: 0000000000001a0c R11: 0000000000000293 R12: 000000000010c59d hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 R13: 00000000000003e8 R14: 00007f285f6edf60 R15: 000000000010c593 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 Showing all locks held in the system: hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 1 lock held by khungtaskd/1571: #0: 000000008f1ae57b (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 1 lock held by in:imklog/7798: #0: 000000008616eb55 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 2 locks held by rs:main Q:Reg/7799: hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 2 locks held by agetty/7814: #0: 00000000c43d55e5 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 #1: 00000000e6bf1372 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x217/0x1950 drivers/tty/n_tty.c:2154 2 locks held by kworker/u4:10/12853: #0: 000000009c2dc7c3 ((wq_completion)"events_unbound"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124 #1: 00000000d7827dfb (connector_reaper_work){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 1 lock held by syz-executor.2/22130: hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 1 lock held by syz-executor.2/22180: 2 locks held by syz-executor.1/22272: 2 locks held by syz-executor.1/22338: hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 1 lock held by syz-executor.1/22390: 2 locks held by syz-executor.2/26883: 2 locks held by syz-executor.2/26955: hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 1 lock held by syz-executor.2/27009: 1 lock held by syz-executor.1/29077: 2 locks held by syz-executor.1/30885: 3 locks held by kworker/1:3/9162: hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 2 locks held by kworker/u4:12/10790: #0: 000000009c2dc7c3 ((wq_completion)"events_unbound"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 #1: 000000004e8d7e1c ((reaper_work).work){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 ============================================= NMI backtrace for cpu 0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 CPU: 0 PID: 1571 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 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 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: NMI backtrace for cpu 1 CPU: 1 PID: 29077 Comm: syz-executor.1 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x4/0x50 kernel/kcov.c:100 Code: e8 11 dd 35 00 e9 ab fe ff ff 4c 89 ef e8 04 dd 35 00 e9 23 fe ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 8b 34 24 <65> 48 8b 04 25 c0 df 01 00 65 8b 15 cc 59 9f 7e 81 e2 00 01 1f 00 RSP: 0018:ffff88803d6f7978 EFLAGS: 00000202 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff811c60ba RDX: 0000000000000001 RSI: ffffffff811c661b RDI: 0000000000000001 RBP: ffff88803e751440 R08: ffffffff810d54dd R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000031 R13: ffff88803e751440 R14: 0000000000000000 R15: dffffc0000000000 FS: 00007fb440032700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 00000000301f5000 CR4: 00000000003426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __preempt_count_add arch/x86/include/asm/preempt.h:76 [inline] rcu_read_lock_sched_notrace include/linux/rcupdate.h:749 [inline] trace_kvm_exit arch/x86/kvm/trace.h:225 [inline] vmx_handle_exit+0x61b/0xf90 arch/x86/kvm/vmx.c:10086 vcpu_enter_guest arch/x86/kvm/x86.c:7857 [inline] vcpu_run arch/x86/kvm/x86.c:7920 [inline] kvm_arch_vcpu_ioctl_run+0x27b2/0x6f70 arch/x86/kvm/x86.c:8120 kvm_vcpu_ioctl+0x493/0xe10 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2847 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fb442abca39 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fb440032188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fb442bbff60 RCX: 00007fb442abca39 RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000006 RBP: 00007fb442b16e8f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffeeaf5baef R14: 00007fb440032300 R15: 0000000000022000 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 ---------------- Code disassembly (best guess): 0: e8 11 dd 35 00 callq 0x35dd16 5: e9 ab fe ff ff jmpq 0xfffffeb5 a: 4c 89 ef mov %r13,%rdi d: e8 04 dd 35 00 callq 0x35dd16 12: e9 23 fe ff ff jmpq 0xfffffe3a 17: 90 nop 18: 90 nop 19: 90 nop 1a: 90 nop 1b: 90 nop 1c: 90 nop 1d: 90 nop 1e: 90 nop 1f: 90 nop 20: 90 nop 21: 90 nop 22: 90 nop 23: 90 nop 24: 90 nop 25: 90 nop 26: 48 8b 34 24 mov (%rsp),%rsi * 2a: 65 48 8b 04 25 c0 df mov %gs:0x1dfc0,%rax <-- trapping instruction 31: 01 00 33: 65 8b 15 cc 59 9f 7e mov %gs:0x7e9f59cc(%rip),%edx # 0x7e9f5a06 3a: 81 e2 00 01 1f 00 and $0x1f0100,%edx