rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 2634 jiffies s: 67677 root: 0x1/. rcu: blocking rcu_node structures (internal RCU debug): Sending NMI from CPU 1 to CPUs 0: cdc_wdm 5-1:1.0: nonzero urb status received: -71 NMI backtrace for cpu 0 CPU: 0 PID: 12849 Comm: syz-executor.4 Not tainted 6.10.0-rc2-syzkaller-00007-gf06ce441457d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 RIP: 0010:io_serial_in+0x76/0xb0 drivers/tty/serial/8250/8250_port.c:406 Code: 20 d2 59 fc 89 e9 41 d3 e6 48 83 c3 40 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 01 92 bf fc 44 03 33 44 89 f2 ec <0f> b6 c0 5b 41 5e 41 5f 5d c3 cc cc cc cc 89 e9 80 e1 07 38 c1 7c RSP: 0000:ffffc900000063b8 EFLAGS: 00000002 RAX: 1ffffffff2959c00 RBX: ffffffff94ace200 RCX: 0000000000000000 RDX: 00000000000003fd RSI: 0000000000000000 RDI: 0000000000000020 RBP: 0000000000000000 R08: ffffffff853c4456 R09: 1ffff11003fb3046 R10: dffffc0000000000 R11: ffffffff853c4410 R12: dffffc0000000000 R13: 00000000000026ff R14: 00000000000003fd R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880b9400000(0063) knlGS:00000000572a6400 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f7303790 CR3: 000000006818a000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: serial_in drivers/tty/serial/8250/8250.h:117 [inline] serial_lsr_in drivers/tty/serial/8250/8250.h:139 [inline] wait_for_lsr drivers/tty/serial/8250/8250_port.c:2068 [inline] serial8250_console_fifo_write drivers/tty/serial/8250/8250_port.c:3315 [inline] serial8250_console_write+0x1099/0x1770 drivers/tty/serial/8250/8250_port.c:3393 console_emit_next_record kernel/printk/printk.c:2928 [inline] console_flush_all+0x865/0xfd0 kernel/printk/printk.c:2994 console_unlock+0x13b/0x4d0 kernel/printk/printk.c:3063 vprintk_emit+0x5a6/0x770 kernel/printk/printk.c:2345 dev_vprintk_emit+0x2ae/0x330 drivers/base/core.c:4951 dev_printk_emit+0xdd/0x120 drivers/base/core.c:4962 _dev_err+0x122/0x170 drivers/base/core.c:5017 wdm_int_callback+0x41f/0xac0 drivers/usb/class/cdc-wdm.c:269 __usb_hcd_giveback_urb+0x373/0x530 drivers/usb/core/hcd.c:1648 dummy_timer+0x830/0x45d0 drivers/usb/gadget/udc/dummy_hcd.c:1987 __run_hrtimer kernel/time/hrtimer.c:1687 [inline] __hrtimer_run_queues+0x59b/0xd50 kernel/time/hrtimer.c:1751 hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1813 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline] __sysvec_apic_timer_interrupt+0x110/0x3f0 arch/x86/kernel/apic/apic.c:1049 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:ieee80211_rx_h_sta_process net/mac80211/rx.c:1762 [inline] RIP: 0010:ieee80211_rx_handlers+0xc00/0xb820 net/mac80211/rx.c:4186 Code: 80 01 00 00 48 89 df be 08 00 00 00 e8 09 b0 ff f6 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 83 ad ff f6 48 8b 1b <48> 89 de 48 83 e6 08 31 ff e8 52 f2 99 f6 48 83 e3 08 48 8b 5c 24 RSP: 0000:ffffc90000007400 EFLAGS: 00000246 RAX: 1ffff1100fbf4830 RBX: 000000000030000b RCX: ffffffff8afc28e7 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88807dfa4180 RBP: ffffc90000007750 R08: ffff88807dfa4187 R09: 1ffff1100fbf4830 R10: dffffc0000000000 R11: ffffed100fbf4831 R12: 0000000000000000 R13: dffffc0000000000 R14: ffffc90000007a68 R15: ffff88801ea15976 ieee80211_invoke_rx_handlers net/mac80211/rx.c:4235 [inline] ieee80211_prepare_and_rx_handle+0x31ab/0x6360 net/mac80211/rx.c:5083 __ieee80211_rx_handle_packet net/mac80211/rx.c:5324 [inline] ieee80211_rx_list+0x2cde/0x3780 net/mac80211/rx.c:5459 ieee80211_rx_napi+0x18a/0x3c0 net/mac80211/rx.c:5482 ieee80211_rx include/net/mac80211.h:5093 [inline] ieee80211_tasklet_handler+0xeb/0x1f0 net/mac80211/main.c:438 tasklet_action_common+0x321/0x4d0 kernel/softirq.c:785 handle_softirqs+0x2c4/0x970 kernel/softirq.c:554 __do_softirq kernel/softirq.c:588 [inline] invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 irq_exit_rcu+0x9/0x30 kernel/softirq.c:649 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:next_uptodate_folio+0xa46/0xb10 mm/filemap.c:3499 Code: a5 c8 ff 4c 8b 74 24 18 49 bd 00 00 00 00 00 fc ff df 4c 8b 7c 24 08 e9 f9 f9 ff ff e8 d3 a5 c8 ff eb 05 e8 cc a5 c8 ff 31 db <48> 89 d8 48 83 c4 48 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc RSP: 0000:ffffc900033cf6c0 EFLAGS: 00000293 RAX: ffffffff81cd70d1 RBX: ffffea0001e4a980 RCX: ffff88801b2ada00 RDX: 0000000000000000 RSI: 000000000000017e RDI: 000000000000006e RBP: 000000000000006e R08: ffffffff81cd6b57 R09: 1ffffd40003c9530 R10: dffffc0000000000 R11: fffff940003c9531 R12: ffffc900033cf8a0 R13: dffffc0000000000 R14: ffffea0001e4a9b4 R15: 000000000000017e filemap_map_pages+0x1338/0x1e70 mm/filemap.c:3652 do_fault_around mm/memory.c:4884 [inline] do_read_fault mm/memory.c:4917 [inline] do_fault mm/memory.c:5056 [inline] do_pte_missing mm/memory.c:3903 [inline] handle_pte_fault+0x3c13/0x7130 mm/memory.c:5380 __handle_mm_fault mm/memory.c:5523 [inline] handle_mm_fault+0x10df/0x1ba0 mm/memory.c:5688 do_user_addr_fault arch/x86/mm/fault.c:1338 [inline] handle_page_fault arch/x86/mm/fault.c:1481 [inline] exc_page_fault+0x459/0x8c0 arch/x86/mm/fault.c:1539 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0023:0xf7303790 Code: 80 78 a4 b6 00 89 38 e8 9e e8 ff ff 89 7c 24 18 89 74 24 14 89 5c 24 10 5b 5e 5f e9 6a 30 ff ff 66 90 66 90 66 90 66 90 66 90 54 4a fa ff 81 c2 5f 48 0f 00 f7 d8 c7 c2 d8 ff ff ff 65 89 02 RSP: 002b:00000000f7559afc EFLAGS: 00010202 RAX: fffffffffffffff5 RBX: 00000000f73f7ff4 RCX: 0000000000000080 RDX: 0000000000000000 RSI: 000000000005f724 RDI: 00000000f7559cc0 RBP: 00000000f742cfcc R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 5-1:1.0: nonzero urb status received: -71 cdc_wdm 5-1:1.0: wdm_int_callback - 0 bytes