------------[ cut here ]------------
proc_dir_entry 'asound/card0' already registered
WARNING: CPU: 1 PID: 5671 at fs/proc/generic.c:359 proc_register+0x3d4/0x540 fs/proc/generic.c:359
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 5671 Comm: kworker/1:6 Not tainted 5.1.0-rc3+ #8
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+0x292/0x5e1 kernel/panic.c:214
 __warn.cold+0x20/0x53 kernel/panic.c:571
 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:973
RIP: 0010:proc_register+0x3d4/0x540 fs/proc/generic.c:359
Code: ff df 48 89 f9 48 c1 e9 03 80 3c 01 00 0f 85 61 01 00 00 48 8b 04 24 48 c7 c7 20 27 cf 85 48 8b b0 d0 00 00 00 e8 f7 75 90 ff <0f> 0b 48 c7 c7 c0 14 db 86 e8 ee 87 e6 03 48 8b 4c 24 28 48 b8 00
RSP: 0018:ffff8881cb18efa0 EFLAGS: 00010282
RAX: 0000000000000000 RBX: ffff8881d9e9b5c0 RCX: 0000000000000000
RDX: 0000000000040000 RSI: ffffffff8127bbcd RDI: ffffed1039631de6
RBP: ffff8881c7726000 R08: ffff8881ca8d1800 R09: ffffed103b664d30
R10: ffffed103b664d2f R11: ffff8881db32697f R12: 0000000000000000
R13: dffffc0000000000 R14: ffff8881cb176838 R15: 0000000000000005
 proc_mkdir_data+0x176/0x220 fs/proc/generic.c:475
 __snd_info_register sound/core/info.c:814 [inline]
 snd_info_register+0x2f3/0x3e0 sound/core/info.c:854
 create_subdir+0x64/0xa0 sound/core/info.c:458
 snd_info_card_create+0xca/0x230 sound/core/info.c:528
 snd_card_new+0x618/0x920 sound/core/init.c:255
 line6_probe+0x130/0x1140 sound/usb/line6/driver.c:736
 usb_probe_interface+0x30d/0x7b0 drivers/usb/core/driver.c:361
 really_probe+0x296/0x680 drivers/base/dd.c:509
 driver_probe_device+0xf9/0x200 drivers/base/dd.c:671
 __device_attach_driver+0x1c4/0x230 drivers/base/dd.c:778
 bus_for_each_drv+0x15e/0x1e0 drivers/base/bus.c:454
 __device_attach+0x21e/0x360 drivers/base/dd.c:844
 bus_probe_device+0x1ec/0x2a0 drivers/base/bus.c:514
 device_add+0xaf4/0x1700 drivers/base/core.c:2106
 usb_set_configuration+0xdf2/0x1670 drivers/usb/core/message.c:2023
 generic_probe+0x9d/0xd5 drivers/usb/core/generic.c:210
 usb_probe_device+0xa8/0x110 drivers/usb/core/driver.c:266
 really_probe+0x296/0x680 drivers/base/dd.c:509
 driver_probe_device+0xf9/0x200 drivers/base/dd.c:671
 __device_attach_driver+0x1c4/0x230 drivers/base/dd.c:778
 bus_for_each_drv+0x15e/0x1e0 drivers/base/bus.c:454
 __device_attach+0x21e/0x360 drivers/base/dd.c:844
 bus_probe_device+0x1ec/0x2a0 drivers/base/bus.c:514
 device_add+0xaf4/0x1700 drivers/base/core.c:2106
 usb_new_device.cold+0x8b8/0x1030 drivers/usb/core/hub.c:2534
 hub_port_connect drivers/usb/core/hub.c:5089 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5204 [inline]
 port_event drivers/usb/core/hub.c:5350 [inline]
 hub_event+0x1ac9/0x35a0 drivers/usb/core/hub.c:5432
 process_one_work+0x90a/0x1580 kernel/workqueue.c:2269
 worker_thread+0x96/0xe20 kernel/workqueue.c:2415
 kthread+0x30e/0x420 kernel/kthread.c:253
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
Kernel Offset: disabled
Rebooting in 86400 seconds..