R13: 00000000004c95ff R14: 00000000004e0958 R15: 0000000000000004
Bluetooth: Can't register HCI device
kobject_add_internal failed for hci1 (error: -2 parent: bluetooth)
------------[ cut here ]------------
kobject: 'hci2' (ffff88805ec92e28): kobject_cleanup, parent           (null)
WARNING: CPU: 1 PID: 9959 at fs/kernfs/dir.c:494 kernfs_get+0x58/0x70 fs/kernfs/dir.c:494
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 9959 Comm: syz-executor.4 Not tainted 4.14.131 #25
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
 panic+0x1f2/0x426 kernel/panic.c:182
kobject: '(null)' (ffff88805eeed0e8): kobject_cleanup, parent           (null)
 __warn.cold+0x2f/0x36 kernel/panic.c:546
 report_bug+0x216/0x254 lib/bug.c:186
 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
Bluetooth: Can't register HCI device
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:314
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:960
RIP: 0010:kernfs_get+0x58/0x70 fs/kernfs/dir.c:494
RSP: 0018:ffff88805a857978 EFLAGS: 00010216
kobject: 'hci2' (ffff88805ec92e28): calling ktype release
RAX: 0000000000040000 RBX: ffff888085e6fd20 RCX: ffffc9000ba5b000
RDX: 00000000000015a1 RSI: ffffffff81a99078 RDI: ffff888085e6fd20
RBP: ffff88805a857980 R08: ffff88805e724100 R09: 0000000000000001
R10: 0000000000000000 R11: ffff88805e724100 R12: ffff8880a5c8c380
R13: ffff8880a5a14480 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
kobject: '(null)' (ffff88805eeed0e8): calling ktype release
 sysfs_create_dir_ns+0xbe/0x1d0 fs/sysfs/dir.c:55
 create_dir lib/kobject.c:71 [inline]
 kobject_add_internal.part.0.cold+0x114/0x5ae lib/kobject.c:229
 kobject_add_internal lib/kobject.c:205 [inline]
 kobject_add_varg lib/kobject.c:364 [inline]
 kobject_add+0x11f/0x180 lib/kobject.c:409
 device_add+0x383/0x1490 drivers/base/core.c:1809
 hci_register_dev+0x2d9/0x810 net/bluetooth/hci_core.c:3118
kobject: 'hci1' (ffff88805bb22428): kobject_cleanup, parent           (null)
 __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
 call_write_iter include/linux/fs.h:1777 [inline]
 new_sync_write fs/read_write.c:469 [inline]
 __vfs_write+0x4a7/0x6b0 fs/read_write.c:482
kobject: 'hci2': free name
 vfs_write+0x198/0x500 fs/read_write.c:544
 SYSC_write fs/read_write.c:590 [inline]
 SyS_write+0xfd/0x230 fs/read_write.c:582
 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x459519
RSP: 002b:00007f237b92cc78 EFLAGS: 00000246
kobject: 'hci1' (ffff88805bb22428): calling ktype release
 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459519
RDX: 0000000000000002 RSI: 0000000020000000 RDI: 0000000000000004
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f237b92d6d4
R13: 00000000004c95ff R14: 00000000004e0958 R15: 00000000ffffffff
Kernel Offset: disabled
Rebooting in 86400 seconds..