usb 1-1: USB disconnect, device number 2
WARNING: CPU: 0 PID: 12 at net/core/dev.c:8172 rollback_registered_many+0x1df/0xe00 net/core/dev.c:8172
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.2.0-rc6+ #14
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: usb_hub_wq hub_event
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0xca/0x13e lib/dump_stack.c:113
 panic+0x292/0x6c9 kernel/panic.c:219
 __warn.cold+0x20/0x4b kernel/panic.c:576
 report_bug+0x262/0x2a0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:179 [inline]
 fixup_bug arch/x86/kernel/traps.c:174 [inline]
 do_error_trap+0x12b/0x1e0 arch/x86/kernel/traps.c:272
 do_invalid_op+0x32/0x40 arch/x86/kernel/traps.c:291
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:986
RIP: 0010:rollback_registered_many+0x1df/0xe00 net/core/dev.c:8172
Code: 84 c0 74 06 0f 8e 39 0a 00 00 44 0f b6 bb 28 05 00 00 31 ff 44 89 fe e8 8f 01 8b fc 45 84 ff 0f 85 49 ff ff ff e8 51 00 8b fc <0f> 0b 4c 89 e7 e8 57 f2 2c fd 31 ff 41 89 c4 89 c6 e8 6b 01 8b fc
RSP: 0018:ffff8881d9e0f6a8 EFLAGS: 00010293
RAX: ffff8881d9df9800 RBX: ffff8881cf0a0000 RCX: ffffffff84b1db51
RDX: 0000000000000000 RSI: ffffffff84b1db5f RDI: 0000000000000001
RBP: ffff8881d9e0f7d8 R08: ffff8881d9df9800 R09: fffffbfff0f2f0ad
R10: fffffbfff0f2f0ac R11: ffffffff87978567 R12: ffff8881cf0a0070
R13: ffff8881d9e0f768 R14: dffffc0000000000 R15: 0000000000000000
 rollback_registered+0xf2/0x1c0 net/core/dev.c:8248
 unregister_netdevice_queue net/core/dev.c:9295 [inline]
 unregister_netdevice_queue+0x1d7/0x2b0 net/core/dev.c:9288
 unregister_netdevice include/linux/netdevice.h:2631 [inline]
 unregister_netdev+0x18/0x20 net/core/dev.c:9336
 r871xu_dev_remove+0xe2/0x215 drivers/staging/rtl8712/usb_intf.c:604
 usb_unbind_interface+0x1bd/0x8a0 drivers/usb/core/driver.c:423
 __device_release_driver drivers/base/dd.c:1081 [inline]
 device_release_driver_internal+0x404/0x4c0 drivers/base/dd.c:1112
 bus_remove_device+0x2dc/0x4a0 drivers/base/bus.c:556
 device_del+0x460/0xb80 drivers/base/core.c:2274
 usb_disable_device+0x211/0x690 drivers/usb/core/message.c:1237
 usb_disconnect+0x284/0x830 drivers/usb/core/hub.c:2199
 hub_port_connect drivers/usb/core/hub.c:4949 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5213 [inline]
 port_event drivers/usb/core/hub.c:5359 [inline]
 hub_event+0x143d/0x35f0 drivers/usb/core/hub.c:5441
 process_one_work+0x905/0x1570 kernel/workqueue.c:2269
 process_scheduled_works kernel/workqueue.c:2331 [inline]
 worker_thread+0x7ab/0xe20 kernel/workqueue.c:2417
 kthread+0x30b/0x410 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Kernel Offset: disabled
Rebooting in 86400 seconds..