usbtmc 3-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-...!: (8533 ticks this GP) idle=dd6/1/0x4000000000000000 softirq=10905/10905 fqs=0 (t=10503 jiffies g=10513 q=146) rcu: rcu_preempt kthread starved for 10505 jiffies! g10513 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. rcu: RCU grace-period kthread stack dump: task:rcu_preempt state:R running task stack:28864 pid: 14 ppid: 2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:4683 [inline] __schedule+0x93a/0x26f0 kernel/sched/core.c:5940 schedule+0xd3/0x270 kernel/sched/core.c:6019 schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1878 rcu_gp_fqs_loop kernel/rcu/tree.c:1996 [inline] rcu_gp_kthread+0xd34/0x1980 kernel/rcu/tree.c:2169 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 rcu: Stack dump where RCU GP kthread last ran: NMI backtrace for cpu 1 CPU: 1 PID: 29 Comm: kworker/1:1 Not tainted 5.14.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: 0x0 (usb_hub_wq) Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:105 nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_check_gp_kthread_starvation.cold+0x1d1/0x1d6 kernel/rcu/tree_stall.h:479 print_cpu_stall kernel/rcu/tree_stall.h:623 [inline] check_cpu_stall kernel/rcu/tree_stall.h:700 [inline] rcu_pending kernel/rcu/tree.c:3922 [inline] rcu_sched_clock_irq.cold+0x9a/0x747 kernel/rcu/tree.c:2641 update_process_times+0x16d/0x200 kernel/time/timer.c:1782 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226 tick_sched_timer+0x1b0/0x2d0 kernel/time/tick-sched.c:1421 __run_hrtimer kernel/time/hrtimer.c:1537 [inline] __hrtimer_run_queues+0x1c0/0xe50 kernel/time/hrtimer.c:1601 hrtimer_interrupt+0x330/0xa00 kernel/time/hrtimer.c:1663 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1089 [inline] __sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1106 sysvec_apic_timer_interrupt+0x40/0xc0 arch/x86/kernel/apic/apic.c:1100 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x38/0x70 kernel/locking/spinlock.c:191 Code: 74 24 10 e8 1a c6 2e f8 48 89 ef e8 c2 3b 2f f8 81 e3 00 02 00 00 75 25 9c 58 f6 c4 02 75 2d 48 85 db 74 01 fb bf 01 00 00 00 a3 15 23 f8 65 8b 05 9c b1 d5 76 85 c0 74 0a 5b 5d c3 e8 c0 6d RSP: 0018:ffffc90000dc0b08 EFLAGS: 00000206 RAX: 0000000000000002 RBX: 0000000000000200 RCX: 1ffffffff1fa36d2 RDX: 0000000000000000 RSI: 0000000000000102 RDI: 0000000000000001 RBP: ffff8880216d8000 R08: 0000000000000001 R09: ffffffff8fcce96f R10: 0000000000000001 R11: 0000000000000000 R12: ffff888021786440 R13: ffff888016017000 R14: dffffc0000000000 R15: ffff88803652a600 spin_unlock_irqrestore include/linux/spinlock.h:409 [inline] dummy_timer+0x12f6/0x32b0 drivers/usb/gadget/udc/dummy_hcd.c:2001 call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1417 expire_timers kernel/time/timer.c:1462 [inline] __run_timers.part.0+0x675/0xa50 kernel/time/timer.c:1731 __run_timers kernel/time/timer.c:1712 [inline] run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1744 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558 invoke_softirq kernel/softirq.c:432 [inline] __irq_exit_rcu+0x16e/0x1c0 kernel/softirq.c:636 irq_exit_rcu+0x5/0x20 kernel/softirq.c:648 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1100 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:finish_task_switch.isra.0+0x23c/0xa50 kernel/sched/core.c:4557 Code: 8b 3a 4c 89 e7 48 c7 02 00 00 00 00 ff d1 4d 85 ff 75 bf 4c 89 e7 e8 83 74 dc 07 e8 3e e3 2b 00 fb 65 48 8b 1c 25 00 f0 01 00 <48> 8d bb 10 15 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 RSP: 0018:ffffc90000dffd08 EFLAGS: 00000202 RAX: 000000000002c8ab RBX: ffff8880155ab880 RCX: 1ffffffff1ad80d9 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90000dffd48 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff817bac28 R11: 0000000000000001 R12: ffff8880b9d51a80 R13: ffff88801f388000 R14: 0000000000000000 R15: ffff8880b9d51a98 context_switch kernel/sched/core.c:4686 [inline] __schedule+0x942/0x26f0 kernel/sched/core.c:5940 schedule+0xd3/0x270 kernel/sched/core.c:6019 worker_thread+0x15c/0x11f0 kernel/workqueue.c:2443 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 NMI backtrace for cpu 1 CPU: 1 PID: 29 Comm: kworker/1:1 Not tainted 5.14.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: 0x0 (usb_hub_wq) Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:105 nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_dump_cpu_stacks+0x25e/0x3f0 kernel/rcu/tree_stall.h:342 print_cpu_stall kernel/rcu/tree_stall.h:625 [inline] check_cpu_stall kernel/rcu/tree_stall.h:700 [inline] rcu_pending kernel/rcu/tree.c:3922 [inline] rcu_sched_clock_irq.cold+0x9f/0x747 kernel/rcu/tree.c:2641 update_process_times+0x16d/0x200 kernel/time/timer.c:1782 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226 tick_sched_timer+0x1b0/0x2d0 kernel/time/tick-sched.c:1421 __run_hrtimer kernel/time/hrtimer.c:1537 [inline] __hrtimer_run_queues+0x1c0/0xe50 kernel/time/hrtimer.c:1601 hrtimer_interrupt+0x330/0xa00 kernel/time/hrtimer.c:1663 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1089 [inline] __sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1106 sysvec_apic_timer_interrupt+0x40/0xc0 arch/x86/kernel/apic/apic.c:1100 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x38/0x70 kernel/locking/spinlock.c:191 Code: 74 24 10 e8 1a c6 2e f8 48 89 ef e8 c2 3b 2f f8 81 e3 00 02 00 00 75 25 9c 58 f6 c4 02 75 2d 48 85 db 74 01 fb bf 01 00 00 00 a3 15 23 f8 65 8b 05 9c b1 d5 76 85 c0 74 0a 5b 5d c3 e8 c0 6d RSP: 0018:ffffc90000dc0b08 EFLAGS: 00000206 RAX: 0000000000000002 RBX: 0000000000000200 RCX: 1ffffffff1fa36d2 RDX: 0000000000000000 RSI: 0000000000000102 RDI: 0000000000000001 RBP: ffff8880216d8000 R08: 0000000000000001 R09: ffffffff8fcce96f R10: 0000000000000001 R11: 0000000000000000 R12: ffff888021786440 R13: ffff888016017000 R14: dffffc0000000000 R15: ffff88803652a600 spin_unlock_irqrestore include/linux/spinlock.h:409 [inline] dummy_timer+0x12f6/0x32b0 drivers/usb/gadget/udc/dummy_hcd.c:2001 call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1417 expire_timers kernel/time/timer.c:1462 [inline] __run_timers.part.0+0x675/0xa50 kernel/time/timer.c:1731 __run_timers kernel/time/timer.c:1712 [inline] run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1744 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558 invoke_softirq kernel/softirq.c:432 [inline] __irq_exit_rcu+0x16e/0x1c0 kernel/softirq.c:636 irq_exit_rcu+0x5/0x20 kernel/softirq.c:648 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1100 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:finish_task_switch.isra.0+0x23c/0xa50 kernel/sched/core.c:4557 Code: 8b 3a 4c 89 e7 48 c7 02 00 00 00 00 ff d1 4d 85 ff 75 bf 4c 89 e7 e8 83 74 dc 07 e8 3e e3 2b 00 fb 65 48 8b 1c 25 00 f0 01 00 <48> 8d bb 10 15 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 RSP: 0018:ffffc90000dffd08 EFLAGS: 00000202 RAX: 000000000002c8ab RBX: ffff8880155ab880 RCX: 1ffffffff1ad80d9 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90000dffd48 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff817bac28 R11: 0000000000000001 R12: ffff8880b9d51a80 R13: ffff88801f388000 R14: 0000000000000000 R15: ffff8880b9d51a98 context_switch kernel/sched/core.c:4686 [inline] __schedule+0x942/0x26f0 kernel/sched/core.c:5940 schedule+0xd3/0x270 kernel/sched/core.c:6019 worker_thread+0x15c/0x11f0 kernel/workqueue.c:2443 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 1-1:0.0: unknown status received: -71 usbtmc 4-1:0.0: unknown status received: -71 usbtmc 3-1:0.0: unknown status received: -71 usbtmc 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