URB 000000000fd37efb submitted while active WARNING: CPU: 1 PID: 8005 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 ... kobject: 'loop1' (00000000845a87b3): kobject_uevent_env CPU: 1 PID: 8005 Comm: kworker/1:3 Not tainted 5.0.0-rc3+ #40 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events_power_efficient hub_init_func2 kobject: 'loop1' (00000000845a87b3): fill_kobj_path: path = '/devices/virtual/block/loop1' Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1db/0x2d0 lib/dump_stack.c:113 panic+0x2cb/0x65c kernel/panic.c:214 kobject: 'loop2' (000000009d38854b): kobject_uevent_env __warn.cold+0x20/0x48 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 kobject: 'loop2' (000000009d38854b): fill_kobj_path: path = '/devices/virtual/block/loop2' 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 d3 81 88 fc 84 db 0f 85 fe f5 ff ff e8 86 80 88 fc 4c 89 fe 48 c7 c7 80 c9 b2 88 c6 05 c0 ca 5e 05 01 e8 50 cd 51 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:ffff88808f03f820 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff816854c6 RDI: 0000000000000005 RBP: ffff88808f03f880 R08: ffff88808f036480 R09: ffff88808f036d48 R10: ffff88808f036480 R11: 0000000000000000 R12: ffff88807f8c5250 R13: ffff88808f03f9a0 R14: 00000000fffffff0 R15: ffff88809ed2a800 hub_activate+0xce7/0x1980 drivers/usb/core/hub.c:1225 hub_init_func2+0x1e/0x30 drivers/usb/core/hub.c:1250 process_one_work+0xd0c/0x1ce0 kernel/workqueue.c:2153 worker_thread+0x143/0x14a0 kernel/workqueue.c:2296 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..