ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
hso 2-1:0.0: Failed to find BULK IN ep
------------[ cut here ]------------
sysfs group 'power' not found for kobject 'ttyHS0'
WARNING: CPU: 1 PID: 83 at fs/sysfs/group.c:278 sysfs_remove_group fs/sysfs/group.c:278 [inline]
WARNING: CPU: 1 PID: 83 at fs/sysfs/group.c:278 sysfs_remove_group+0x155/0x1b0 fs/sysfs/group.c:269
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 83 Comm: kworker/1:2 Not tainted 5.6.0-rc7-syzkaller #0
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+0xef/0x16e lib/dump_stack.c:118
 panic+0x2aa/0x6e1 kernel/panic.c:221
 __warn.cold+0x2f/0x30 kernel/panic.c:582
 report_bug+0x27b/0x2f0 lib/bug.c:195
 fixup_bug arch/x86/kernel/traps.c:174 [inline]
 fixup_bug arch/x86/kernel/traps.c:169 [inline]
 do_error_trap+0x12b/0x1e0 arch/x86/kernel/traps.c:267
 do_invalid_op+0x32/0x40 arch/x86/kernel/traps.c:286
 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027
RIP: 0010:sysfs_remove_group fs/sysfs/group.c:278 [inline]
RIP: 0010:sysfs_remove_group+0x155/0x1b0 fs/sysfs/group.c:269
Code: 48 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 41 48 8b 33 48 c7 c7 e0 58 f1 85 e8 93 27 84 ff <0f> 0b eb 95 e8 52 60 d8 ff e9 d2 fe ff ff 48 89 df e8 45 60 d8 ff
RSP: 0018:ffff8881d8a870b8 EFLAGS: 00010282
RAX: 0000000000000000 RBX: ffffffff8615ed00 RCX: 0000000000000000
RDX: 0000000000040000 RSI: ffffffff812974dd RDI: ffffed103b150e09
RBP: 0000000000000000 R08: ffff8881d8d74980 R09: ffffed103b66439f
R10: ffffed103b66439e R11: ffff8881db321cf3 R12: ffff8881cc14c000
R13: ffffffff8615f2a0 R14: ffff8881d4a0b000 R15: ffff8881a7de8070
 dpm_sysfs_remove+0x97/0xb0 drivers/base/power/sysfs.c:741
 device_del+0x18b/0xd30 drivers/base/core.c:2654
 device_unregister+0x22/0xc0 drivers/base/core.c:2709
 device_destroy+0x96/0xd0 drivers/base/core.c:3288
 tty_unregister_device+0x7e/0x1a0 drivers/tty/tty_io.c:3190
 hso_serial_tty_unregister drivers/net/usb/hso.c:2232 [inline]
 hso_create_bulk_serial_device drivers/net/usb/hso.c:2678 [inline]
 hso_probe.cold+0x6e/0x14c drivers/net/usb/hso.c:2944
 usb_probe_interface+0x310/0x800 drivers/usb/core/driver.c:374
 really_probe+0x290/0xac0 drivers/base/dd.c:551
 driver_probe_device+0x223/0x350 drivers/base/dd.c:724
 __device_attach_driver+0x1d1/0x290 drivers/base/dd.c:831
 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:431
 __device_attach+0x217/0x390 drivers/base/dd.c:897
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:491
 device_add+0x1459/0x1bf0 drivers/base/core.c:2500
 usb_set_configuration+0xece/0x1840 drivers/usb/core/message.c:2025
 usb_generic_driver_probe+0x9d/0xe0 drivers/usb/core/generic.c:241
 usb_probe_device+0xd9/0x230 drivers/usb/core/driver.c:272
 really_probe+0x290/0xac0 drivers/base/dd.c:551
 driver_probe_device+0x223/0x350 drivers/base/dd.c:724
 __device_attach_driver+0x1d1/0x290 drivers/base/dd.c:831
 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:431
 __device_attach+0x217/0x390 drivers/base/dd.c:897
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:491
 device_add+0x1459/0x1bf0 drivers/base/core.c:2500
 usb_new_device.cold+0x540/0xcd0 drivers/usb/core/hub.c:2548
 hub_port_connect drivers/usb/core/hub.c:5195 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5335 [inline]
 port_event drivers/usb/core/hub.c:5481 [inline]
 hub_event+0x21cb/0x4300 drivers/usb/core/hub.c:5563
 process_one_work+0x94b/0x1620 kernel/workqueue.c:2266
 worker_thread+0x96/0xe20 kernel/workqueue.c:2412
 kthread+0x318/0x420 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Kernel Offset: disabled
Rebooting in 86400 seconds..