------------[ cut here ]------------
WARNING: CPU: 0 PID: 8747 at fs/kernfs/dir.c:494 kernfs_get+0x58/0x70 fs/kernfs/dir.c:494
Kernel panic - not syncing: panic_on_warn set ...

kobject: 'bluetooth' (ffff888099ea2380): kobject_add_internal: parent: 'virtual', set: '(null)'
CPU: 0 PID: 8747 Comm: syz-executor187 Not tainted 4.14.124 #18
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x138/0x19c lib/dump_stack.c:53
kobject: 'hci0' (ffff888095189be8): calling ktype release
 panic+0x1f2/0x426 kernel/panic.c:182
kobject: 'hci2' (ffff888093875e68): kobject_add_internal: parent: 'bluetooth', set: 'devices'
 __warn.cold+0x2f/0x36 kernel/panic.c:546
kobject: 'hci0' (ffff8880979ddf68): kobject_add_internal: parent: 'bluetooth', set: 'devices'
 report_bug+0x216/0x254 lib/bug.c:186
kobject: 'hci0' (ffff8880979ddf68): kobject_uevent_env
 fixup_bug arch/x86/kernel/traps.c:177 [inline]
 fixup_bug arch/x86/kernel/traps.c:172 [inline]
 do_error_trap+0x1bb/0x310 arch/x86/kernel/traps.c:295
kobject: 'hci2' (ffff888093875e68): kobject_uevent_env
kobject: 'hci0': free name
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:314
kobject: 'hci0' (ffff8880979ddf68): fill_kobj_path: path = '/devices/virtual/bluetooth/hci0'
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:960
kobject: 'hci2' (ffff888093875e68): fill_kobj_path: path = '/devices/virtual/bluetooth/hci2'
RIP: 0010:kernfs_get+0x58/0x70 fs/kernfs/dir.c:494
kobject: 'rfkill1659' (ffff8880a102d768): kobject_add_internal: parent: 'hci0', set: 'devices'
RSP: 0018:ffff88809fce7978 EFLAGS: 00010297
RAX: ffff88809524e500 RBX: ffff888077eb5e00 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000002 RDI: ffff888077eb5e00
RBP: ffff88809fce7980 R08: ffff88809524e500 R09: 0000000000000001
R10: 0000000000000000 R11: ffff88809524e500 R12: ffff88809907e700
kobject: 'rfkill1659' (ffff8880a102d768): kobject_uevent_env
R13: ffff8880910a94c0 R14: 0000000000000001 R15: 00000000000041ed
 kernfs_new_node+0x95/0xf0 fs/kernfs/dir.c:680
 kernfs_create_dir_ns+0x41/0x140 fs/kernfs/dir.c:999
 sysfs_create_dir_ns+0xbe/0x1d0 fs/sysfs/dir.c:55
kobject: 'rfkill1659' (ffff8880a102d768): fill_kobj_path: path = '/devices/virtual/bluetooth/hci0/rfkill1659'
 create_dir lib/kobject.c:71 [inline]
 kobject_add_internal.part.0.cold+0x114/0x5ae lib/kobject.c:229
kobject: 'rfkill1660' (ffff888091c6cf28): kobject_add_internal: parent: 'hci2', set: 'devices'
 kobject_add_internal lib/kobject.c:205 [inline]
 kobject_add_varg lib/kobject.c:364 [inline]
 kobject_add+0x11f/0x180 lib/kobject.c:409
kobject: 'rfkill1660' (ffff888091c6cf28): kobject_uevent_env
 device_add+0x383/0x1490 drivers/base/core.c:1809
kobject: 'rfkill1659' (ffff8880a102d768): kobject_uevent_env
 hci_register_dev+0x2d9/0x810 net/bluetooth/hci_core.c:3118
kobject: 'rfkill1659' (ffff8880a102d768): fill_kobj_path: path = '/devices/virtual/bluetooth/hci0/rfkill1659'
kobject: 'rfkill1660' (ffff888091c6cf28): fill_kobj_path: path = '/devices/virtual/bluetooth/hci2/rfkill1660'
 __vhci_create_device+0x2a6/0x560 drivers/bluetooth/hci_vhci.c:139
 vhci_create_device drivers/bluetooth/hci_vhci.c:163 [inline]
 vhci_get_user drivers/bluetooth/hci_vhci.c:219 [inline]
 vhci_write+0x2a1/0x437 drivers/bluetooth/hci_vhci.c:299
kobject: 'rfkill1659' (ffff8880a102d768): kobject_cleanup, parent           (null)
 call_write_iter include/linux/fs.h:1774 [inline]
 new_sync_write fs/read_write.c:469 [inline]
 __vfs_write+0x4a7/0x6b0 fs/read_write.c:482
kobject: 'rfkill1659' (ffff8880a102d768): calling ktype release
 vfs_write+0x198/0x500 fs/read_write.c:544
 SYSC_write fs/read_write.c:589 [inline]
 SyS_write+0xb8/0x180 fs/read_write.c:581
kobject: 'rfkill1660' (ffff888091c6cf28): kobject_uevent_env
kobject: 'rfkill1660' (ffff888091c6cf28): fill_kobj_path: path = '/devices/virtual/bluetooth/hci2/rfkill1660'
 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x441269
RSP: 002b:00007ffee7613b38 EFLAGS: 00000246
kobject: 'rfkill1659': free name
 ORIG_RAX: 0000000000000001
kobject: 'rfkill1660' (ffff888091c6cf28): kobject_cleanup, parent           (null)
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441269
RDX: 0000000000000002 RSI: 00000000200000c0 RDI: 0000000000000003
RBP: 0000000000073455 R08: 00000000004002c8 R09: 00000000004002c8
R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000401fe0
R13: 0000000000402070 R14: 0000000000000000 R15: 0000000000000000
Kernel Offset: disabled
Rebooting in 86400 seconds..