rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 2659 jiffies s: 21137 root: 0x1/. rcu: blocking rcu_node structures (internal RCU debug): Sending NMI from CPU 1 to CPUs 0: cdc_wdm 2-1:1.0: nonzero urb status received: -71 NMI backtrace for cpu 0 CPU: 0 PID: 28907 Comm: kworker/0:0 Not tainted 6.6.0-rc6-syzkaller-ga04224da1f34 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 Workqueue: events_power_efficient gc_worker RIP: 0010:io_serial_out+0x8f/0xb0 drivers/tty/serial/8250/8250_port.c:424 Code: 48 8d 7d 40 44 89 e1 48 b8 00 00 00 00 00 fc ff df 48 89 fa d3 e3 48 c1 ea 03 80 3c 02 00 75 18 66 03 5d 40 44 89 e8 89 da ee <5b> 5d 41 5c 41 5d c3 e8 a5 4c 15 ff eb a4 e8 fe 4c 15 ff eb e1 66 RSP: 0018:ffffc90000007400 EFLAGS: 00000002 RAX: 000000000000005b RBX: 00000000000003f8 RCX: 0000000000000000 RDX: 00000000000003f8 RSI: ffffffff82849d45 RDI: ffffffff8c15dee0 RBP: ffffffff8c15dea0 R08: 0000000000000001 R09: 000000000000001f R10: 0000000000000000 R11: 205d304320202020 R12: 0000000000000000 R13: 000000000000005b R14: ffffffff82849ce0 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8881f6600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fdc61cd7000 CR3: 0000000112233000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: serial_out drivers/tty/serial/8250/8250.h:122 [inline] serial8250_console_fifo_write drivers/tty/serial/8250/8250_port.c:3381 [inline] serial8250_console_write+0xd29/0x1060 drivers/tty/serial/8250/8250_port.c:3452 console_emit_next_record kernel/printk/printk.c:2910 [inline] console_flush_all+0x4eb/0xfb0 kernel/printk/printk.c:2966 console_unlock+0x10c/0x260 kernel/printk/printk.c:3035 vprintk_emit+0x17f/0x5f0 kernel/printk/printk.c:2307 dev_vprintk_emit drivers/base/core.c:4849 [inline] dev_printk_emit+0xfb/0x140 drivers/base/core.c:4860 __dev_printk+0xf5/0x270 drivers/base/core.c:4872 _dev_err+0xe5/0x120 drivers/base/core.c:4915 wdm_int_callback+0x10f/0xaa0 drivers/usb/class/cdc-wdm.c:269 __usb_hcd_giveback_urb+0x359/0x5c0 drivers/usb/core/hcd.c:1650 usb_hcd_giveback_urb+0x389/0x430 drivers/usb/core/hcd.c:1733 dummy_timer+0x1415/0x35f0 drivers/usb/gadget/udc/dummy_hcd.c:1987 call_timer_fn+0x19e/0x580 kernel/time/timer.c:1700 expire_timers kernel/time/timer.c:1751 [inline] __run_timers+0x764/0xb10 kernel/time/timer.c:2022 run_timer_softirq+0x58/0xd0 kernel/time/timer.c:2035 __do_softirq+0x20b/0x94e kernel/softirq.c:553 invoke_softirq kernel/softirq.c:427 [inline] __irq_exit_rcu kernel/softirq.c:632 [inline] irq_exit_rcu+0xa7/0x110 kernel/softirq.c:644 sysvec_apic_timer_interrupt+0x8e/0xb0 arch/x86/kernel/apic/apic.c:1074 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645 RIP: 0010:lock_acquire+0x1ef/0x510 kernel/locking/lockdep.c:5721 Code: c1 05 a5 07 d4 7e 83 f8 01 0f 85 b0 02 00 00 9c 58 f6 c4 02 0f 85 9b 02 00 00 48 85 ed 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24 RSP: 0018:ffffc900021ffb00 EFLAGS: 00000206 RAX: dffffc0000000000 RBX: 1ffff9200043ff62 RCX: 0000000000000001 RDX: 1ffff110209cbc2f RSI: ffffffff8687cc80 RDI: ffffffff86a64d60 RBP: 0000000000000200 R08: 0000000000000000 R09: fffffbfff16def38 R10: ffffffff8b6f79c7 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: ffffffff87eac860 R15: 0000000000000000 rcu_lock_acquire include/linux/rcupdate.h:303 [inline] rcu_read_lock include/linux/rcupdate.h:749 [inline] gc_worker+0x24d/0x17d0 net/netfilter/nf_conntrack_core.c:1488 process_one_work+0x884/0x15c0 kernel/workqueue.c:2630 process_scheduled_works kernel/workqueue.c:2703 [inline] worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784 kthread+0x33c/0x440 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 2-1:1.0: wdm_int_callback - usb_submit_urb failed with result -1 imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored usb 2-1: USB disconnect, device number 22 imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 4-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored usb 2-1: new high-speed USB device number 24 using dummy_hcd usb 2-1: config 0 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7 usb 2-1: New USB device found, idVendor=0926, idProduct=3333, bcdDevice= 0.40 usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 usb 2-1: config 0 descriptor?? usbhid 2-1:0.0: can't add hid device: -71 usbhid: probe of 2-1:0.0 failed with error -71 usb 2-1: USB disconnect, device number 24 usb 2-1: new high-speed USB device number 25 using dummy_hcd usb 2-1: config 0 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7 usb 2-1: New USB device found, idVendor=0926, idProduct=3333, bcdDevice= 0.40 usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 usb 2-1: config 0 descriptor?? usbhid 2-1:0.0: can't add hid device: -71 usbhid: probe of 2-1:0.0 failed with error -71 usb 2-1: USB disconnect, device number 25 powermate: config urb returned -71 powermate: usb_submit_urb(config) failed