kobject_add_internal failed for hci1 (error: -2 parent: bluetooth)
Bluetooth: Can't register HCI device
Bluetooth: Can't register HCI device
kobject_add_internal failed for hci1 (error: -2 parent: bluetooth)
Bluetooth: Can't register HCI device
WARNING: CPU: 1 PID: 12137 at fs/kernfs/dir.c:494 kernfs_get.part.8+0x51/0x60 fs/kernfs/dir.c:497
kobject: 'hci2' ((____ptrval____)): kobject_add_internal: parent: 'bluetooth', set: 'devices'
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 12137 Comm: syz-executor.1 Not tainted 4.18.0-rc2+ #1
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x109/0x15a lib/dump_stack.c:113
 panic+0x1c6/0x37d kernel/panic.c:184
 __warn.cold.8+0x120/0x166 kernel/panic.c:536
 report_bug+0x1a4/0x200 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 do_error_trap+0x200/0x350 arch/x86/kernel/traps.c:296
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:992
RIP: 0010:kernfs_get.part.8+0x51/0x60 fs/kernfs/dir.c:494
Code: 48 89 d8 83 e0 07 83 c0 03 38 d0 7c 04 84 
kobject: 'hci3' ((____ptrval____)): kobject_add_internal: parent: 'bluetooth', set: 'devices'
d2 75 1d 8b 03 85 c0 74 13 be 04 00 00 00 48 89 df e8 45 cb da 
kobject: 'hci5' ((____ptrval____)): kobject_add_internal: parent: 'bluetooth', set: 'devices'
ff f0 ff 03 5b 5d c3 <0f> 0b eb e9 48 89 df e8 c3 db da ff eb d9 
kobject: 'hci5' ((____ptrval____)): kobject_uevent_env
90 48 85 ff 74 0b 55 48 
RSP: 0018:ffff880096e6f910 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff880098f38700 RCX: ffffffff81b3a322
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff880098f38700
RBP: ffff880096e6f918 R08: ffffed00131e70e1 R09: ffffed00131e70e0
R10: ffffed00131e70e0 R11: ffff880098f38703 R12: ffff880098f38700
R13: 0000000000000000 R14: ffff880098f38700 R15: ffff88021b2a0200
 kernfs_get fs/kernfs/dir.c:493 [inline]
 kernfs_new_node+0x78/0xf0 fs/kernfs/dir.c:681
kobject: 'hci2' ((____ptrval____)): kobject_uevent_env
 kernfs_create_dir_ns+0x2b/0x120 fs/kernfs/dir.c:1000
kobject: 'hci3' ((____ptrval____)): kobject_uevent_env
 sysfs_create_dir_ns+0xa2/0x1b0 fs/sysfs/dir.c:54
 create_dir lib/kobject.c:69 [inline]
 kobject_add_internal.cold.11+0xd1/0x4c2 lib/kobject.c:228
 kobject_add_varg lib/kobject.c:363 [inline]
 kobject_add+0x10f/0x170 lib/kobject.c:407
 device_add+0x33e/0x1630 drivers/base/core.c:1829
 hci_register_dev+0x29b/0x750 net/bluetooth/hci_core.c:3108
 __vhci_create_device+0x272/0x500 drivers/bluetooth/hci_vhci.c:139
kobject: 'hci5' ((____ptrval____)): fill_kobj_path: path = '/devices/virtual/bluetooth/hci5'
 vhci_create_device drivers/bluetooth/hci_vhci.c:163 [inline]
 vhci_get_user drivers/bluetooth/hci_vhci.c:219 [inline]
 vhci_write+0x28a/0x3f0 drivers/bluetooth/hci_vhci.c:299
 call_write_iter include/linux/fs.h:1795 [inline]
 new_sync_write fs/read_write.c:474 [inline]
 __vfs_write+0x44e/0x880 fs/read_write.c:487
 vfs_write+0x150/0x4f0 fs/read_write.c:549
 ksys_write+0xcd/0x1b0 fs/read_write.c:598
 __do_sys_write fs/read_write.c:610 [inline]
 __se_sys_write fs/read_write.c:607 [inline]
 __x64_sys_write+0x6e/0xb0 fs/read_write.c:607
 do_syscall_64+0xd6/0x4e0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4582f9
Code: ad b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 
kobject: 'loop5' ((____ptrval____)): kobject_uevent_env
c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 
RSP: 002b:00007fd6b8a73c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004582f9
RDX: 0000000000000002 RSI: 00000000200000c0 RDI: 0000000000000003
RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd6b8a746d4
R13: 00000000004c7636 R14: 00000000004dd428 R15: 00000000ffffffff
Kernel Offset: disabled
Rebooting in 86400 seconds..