------------[ cut here ]------------
proc_dir_entry 'asound/card0' already registered
WARNING: CPU: 0 PID: 5 at fs/proc/generic.c:359 proc_register+0x3d4/0x540
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 5 Comm: kworker/0:0 Not tainted 5.1.0-rc3+ #7
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: usb_hub_wq hub_event
Call Trace:
 dump_stack+0xca/0x13e
 panic+0x292/0x5e1
 __warn.cold+0x20/0x53
 report_bug+0x262/0x2a0
 do_error_trap+0x12b/0x1e0
 do_invalid_op+0x32/0x40
 invalid_op+0x14/0x20
RIP: 0010:proc_register+0x3d4/0x540
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 57 f0 03 48 8b 4c 24 28 48 b8 00
RSP: 0018:ffff8881d9dc6f78 EFLAGS: 00010282
RAX: 0000000000000000 RBX: ffff8881d7803200 RCX: 0000000000000000
RDX: 0000000000040000 RSI: ffffffff8127bbcd RDI: ffffed103b3b8de1
RBP: ffff8881ca6fb000 R08: ffff8881d9d86000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff8881d2033ab8 R15: 0000000000000005
 proc_mkdir_data+0x176/0x220
 snd_info_register+0x2f3/0x3e0
 create_subdir+0x64/0xa0
 snd_info_card_create+0xca/0x230
 snd_card_new+0x618/0x920
 usb_audio_probe+0x1103/0x1f60
 usb_probe_interface+0x30d/0x7b0
 really_probe+0x296/0x680
 driver_probe_device+0xf9/0x200
 __device_attach_driver+0x1c4/0x230
 bus_for_each_drv+0x15e/0x1e0
 __device_attach+0x21e/0x360
 bus_probe_device+0x1ec/0x2a0
 device_add+0xaf4/0x1700
 usb_set_configuration+0xdf2/0x1670
 generic_probe+0x9d/0xd5
 usb_probe_device+0xa8/0x110
 really_probe+0x296/0x680
 driver_probe_device+0xf9/0x200
 __device_attach_driver+0x1c4/0x230
 bus_for_each_drv+0x15e/0x1e0
 __device_attach+0x21e/0x360
 bus_probe_device+0x1ec/0x2a0
 device_add+0xaf4/0x1700
 usb_new_device.cold+0x8b8/0x1030
 hub_event+0x1ac9/0x35a0
 process_one_work+0x90a/0x1580
 worker_thread+0x96/0xe20
 kthread+0x30e/0x420
 ret_from_fork+0x3a/0x50
Kernel Offset: disabled
Rebooting in 86400 seconds..