worker_thread+0x64c/0x1120 kernel/workqueue.c:2415 kthread+0x392/0x470 kernel/kthread.c:291 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293 ------------[ cut here ]------------ sysfs group 'power' not found for kobject 'ttyHS0' WARNING: CPU: 1 PID: 3185 at fs/sysfs/group.c:279 sysfs_remove_group+0x126/0x170 fs/sysfs/group.c:279 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 3185 Comm: kworker/1:4 Not tainted 5.8.0-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+0xf6/0x16e lib/dump_stack.c:118 panic+0x2aa/0x6e1 kernel/panic.c:231 __warn.cold+0x20/0x50 kernel/panic.c:600 report_bug+0x1bd/0x210 lib/bug.c:198 handle_bug+0x41/0x80 arch/x86/kernel/traps.c:235 exc_invalid_op+0x13/0x40 arch/x86/kernel/traps.c:255 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:540 RIP: 0010:sysfs_remove_group+0x126/0x170 fs/sysfs/group.c:279 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 37 48 8b 33 48 c7 c7 c0 bb 11 86 e8 8c be 82 ff <0f> 0b eb 98 e8 21 0e d8 ff e9 01 ff ff ff 48 89 df e8 14 0e d8 ff RSP: 0018:ffff8881ccf26f90 EFLAGS: 00010282 RAX: 0000000000000000 RBX: ffffffff8637a220 RCX: 0000000000000000 RDX: ffff8881ce330000 RSI: ffffffff8129b763 RDI: ffffed10399e4de4 RBP: 0000000000000000 R08: 0000000000000001 R09: ffff8881db32f50f R10: 0000000000000000 R11: 0000000000000000 R12: ffff8881d2057000 R13: ffffffff8637a7c0 R14: 0000000000000001 R15: ffff8881d3e11090 dpm_sysfs_remove+0x97/0xb0 drivers/base/power/sysfs.c:794 device_del+0x18b/0xd20 drivers/base/core.c:2854 device_unregister+0x22/0xc0 drivers/base/core.c:2909 device_destroy+0x96/0xd0 drivers/base/core.c:3455 tty_unregister_device+0x7e/0x1b0 drivers/tty/tty_io.c:3190 hso_serial_tty_unregister drivers/net/usb/hso.c:2233 [inline] hso_serial_common_create+0x40a/0x790 drivers/net/usb/hso.c:2315 hso_create_bulk_serial_device drivers/net/usb/hso.c:2651 [inline] hso_probe+0xefa/0x1f61 drivers/net/usb/hso.c:2947 usb_probe_interface+0x315/0x7f0 drivers/usb/core/driver.c:374 really_probe+0x291/0xc90 drivers/base/dd.c:520 driver_probe_device+0x26b/0x3d0 drivers/base/dd.c:696 __device_attach_driver+0x1d1/0x290 drivers/base/dd.c:802 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:431 __device_attach+0x28d/0x430 drivers/base/dd.c:868 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:491 device_add+0xb09/0x1c10 drivers/base/core.c:2700 usb_set_configuration+0xf05/0x18a0 drivers/usb/core/message.c:2032 usb_generic_driver_probe+0xba/0xf2 drivers/usb/core/generic.c:241 usb_probe_device+0xd9/0x250 drivers/usb/core/driver.c:272 really_probe+0x291/0xc90 drivers/base/dd.c:520 driver_probe_device+0x26b/0x3d0 drivers/base/dd.c:696 __device_attach_driver+0x1d1/0x290 drivers/base/dd.c:802 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:431 __device_attach+0x28d/0x430 drivers/base/dd.c:868 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:491 device_add+0xb09/0x1c10 drivers/base/core.c:2700 usb_new_device.cold+0x71d/0xfd4 drivers/usb/core/hub.c:2554 hub_port_connect drivers/usb/core/hub.c:5208 [inline] hub_port_connect_change drivers/usb/core/hub.c:5348 [inline] port_event drivers/usb/core/hub.c:5494 [inline] hub_event+0x2361/0x4390 drivers/usb/core/hub.c:5576 process_one_work+0x94c/0x15f0 kernel/workqueue.c:2269 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415 kthread+0x392/0x470 kernel/kthread.c:291 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293 Kernel Offset: disabled Rebooting in 86400 seconds..