usb 3-1: send failed (error -71)
snd_usb_toneport 3-1:0.0: Line 6 POD Studio UX2 now attached
usb 3-1: USB disconnect, device number 19
snd_usb_toneport 3-1:0.0: Line 6 POD Studio UX2 now disconnected
------------[ cut here ]------------
list_del corruption. prev->next should be ffff8881d29f85e8, but was ffff8881d7f2b998
WARNING: CPU: 0 PID: 5900 at lib/list_debug.c:51 __list_del_entry_valid+0x101/0x170 lib/list_debug.c:51
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 5900 Comm: kworker/0:6 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:__list_del_entry_valid+0x101/0x170 lib/list_debug.c:51
Code: c4 08 31 c0 41 5c 41 5d c3 4c 89 e2 48 c7 c7 20 f7 d8 85 e8 1c 2a 35 ff 0f 0b 31 c0 eb c6 48 c7 c7 80 f7 d8 85 e8 0a 2a 35 ff <0f> 0b 31 c0 eb b4 48 c7 c7 e0 f7 d8 85 e8 f8 29 35 ff 0f 0b 31 c0
RSP: 0018:ffff8881b03af770 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffff8881d29f84f0 RCX: 0000000000000000
RDX: 000000000001e12e RSI: ffffffff8127bbcd RDI: ffffed1036075ee0
RBP: ffff8881d29f8500 R08: ffff8881d9793000 R09: ffffed103b643cd3
R10: ffffed103b643cd2 R11: ffff8881db21e697 R12: ffff8881d13364a8
R13: ffff8881d7f2b998 R14: ffff8881d29f84f0 R15: ffff8881d29f85d8
 __list_del_entry include/linux/list.h:117 [inline]
 list_del include/linux/list.h:125 [inline]
 snd_info_free_entry+0x132/0x340 sound/core/info.c:795
 snd_info_card_free+0x3e/0x80 sound/core/info.c:606
 snd_card_do_free sound/core/init.c:469 [inline]
 release_card_device+0x63/0xd0 sound/core/init.c:156
 device_release+0x78/0x210 drivers/base/core.c:1064
 kobject_cleanup lib/kobject.c:662 [inline]
 kobject_release lib/kobject.c:691 [inline]
 kref_put include/linux/kref.h:67 [inline]
 kobject_put+0x17d/0x270 lib/kobject.c:708
 put_device+0x1c/0x30 drivers/base/core.c:2205
 snd_card_free_when_closed+0x35/0x50 sound/core/init.c:493
 line6_disconnect.cold+0xa3/0xbc sound/usb/line6/driver.c:833
 usb_unbind_interface+0x1c4/0x8b0 drivers/usb/core/driver.c:423
 __device_release_driver drivers/base/dd.c:1082 [inline]
 device_release_driver_internal+0x431/0x4f0 drivers/base/dd.c:1113
 bus_remove_device+0x2ee/0x4c0 drivers/base/bus.c:556
 device_del+0x462/0xb90 drivers/base/core.c:2269
 usb_disable_device+0x211/0x690 drivers/usb/core/message.c:1237
 usb_disconnect+0x284/0x840 drivers/usb/core/hub.c:2197
 hub_port_connect drivers/usb/core/hub.c:4940 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5204 [inline]
 port_event drivers/usb/core/hub.c:5350 [inline]
 hub_event+0x13f8/0x35a0 drivers/usb/core/hub.c:5432
 process_one_work+0x90a/0x1580 kernel/workqueue.c:2269
 process_scheduled_works kernel/workqueue.c:2331 [inline]
 worker_thread+0x7ab/0xe20 kernel/workqueue.c:2417
 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..