------------[ cut here ]------------
URB 00000000b877c860 submitted while active
WARNING: CPU: 0 PID: 7281 at drivers/usb/core/urb.c:363 usb_submit_urb+0x1110/0x1400 drivers/usb/core/urb.c:363
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 7281 Comm: kworker/0:4 Not tainted 5.0.0-rc6+ #73
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_power_efficient hub_init_func2
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x172/0x1f0 lib/dump_stack.c:113
 panic+0x2cb/0x65c kernel/panic.c:214
 __warn.cold+0x20/0x45 kernel/panic.c:571
 report_bug+0x263/0x2b0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 fixup_bug arch/x86/kernel/traps.c:173 [inline]
 do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271
 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:290
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:973
RIP: 0010:usb_submit_urb+0x1110/0x1400 drivers/usb/core/urb.c:363
Code: 89 de e8 c3 0f 03 fd 84 db 0f 85 fe f5 ff ff e8 76 0e 03 fd 4c 89 fe 48 c7 c7 20 4c d3 87 c6 05 c0 05 ec 04 01 e8 de 59 d6 fc <0f> 0b e9 dc f5 ff ff c7 45 c8 01 00 00 00 e9 94 f6 ff ff 41 be ed
RSP: 0018:ffff888061f87b90 EFLAGS: 00010282
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff815a9256 RDI: ffffed100c3f0f64
RBP: ffff888061f87bf0 R08: ffff888061f78040 R09: ffffed1015d05021
R10: ffffed1015d05020 R11: ffff8880ae828107 R12: ffff88808e70edd0
R13: ffff888061f87cf0 R14: 00000000fffffff0 R15: ffff88809d327000
 hub_activate+0xbb6/0x16f0 drivers/usb/core/hub.c:1225
 hub_init_func2+0x1e/0x30 drivers/usb/core/hub.c:1250
 process_one_work+0x98e/0x1790 kernel/workqueue.c:2173
 worker_thread+0x98/0xe40 kernel/workqueue.c:2319
 kthread+0x357/0x430 kernel/kthread.c:246
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
Kernel Offset: disabled
Rebooting in 86400 seconds..