RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000016
R13: 00000000000003b3 R14: 00000000006f8968 R15: 0000000000000005
------------[ cut here ]------------
kobject_add_internal failed for rfcomm31 (error: -12 parent: tty)
WARNING: CPU: 1 PID: 10390 at lib/kobject.c:242 kobject_add_internal+0x42c/0xba0 lib/kobject.c:240
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 10390 Comm: syz-executor0 Not tainted 4.17.0-rc2+ #19
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+0x1b9/0x294 lib/dump_stack.c:113
 panic+0x22f/0x4de kernel/panic.c:184
 __warn.cold.8+0x163/0x1b3 kernel/panic.c:536
 report_bug+0x252/0x2d0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 do_error_trap+0x1de/0x490 arch/x86/kernel/traps.c:296
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:992
RIP: 0010:kobject_add_internal+0x42c/0xba0 lib/kobject.c:240
RSP: 0018:ffff8801887a7408 EFLAGS: 00010286
RAX: 0000000000000041 RBX: ffff8801cff73550 RCX: ffffc90001eb9000
RDX: 0000000000040000 RSI: ffffffff8160f4e1 RDI: ffff8801887a6f68
RBP: ffff8801887a7500 R08: ffff880187f3a480 R09: 0000000000000006
R10: ffff880187f3a480 R11: 0000000000000000 R12: 00000000fffffff4
R13: ffff8801d485fe80 R14: ffffffff8803b640 R15: ffff8801d9a20000
 kobject_add_varg lib/kobject.c:364 [inline]
 kobject_add+0x13a/0x190 lib/kobject.c:408
 device_add+0x3a5/0x16d0 drivers/base/core.c:1796
 device_register+0x1d/0x20 drivers/base/core.c:1914
 tty_register_device_attr+0x35b/0x730 drivers/tty/tty_io.c:2973
 tty_port_register_device_attr drivers/tty/tty_port.c:134 [inline]
 tty_port_register_device+0x3d/0x50 drivers/tty/tty_port.c:111
 rfcomm_dev_add net/bluetooth/rfcomm/tty.c:330 [inline]
 __rfcomm_create_dev net/bluetooth/rfcomm/tty.c:425 [inline]
 rfcomm_create_dev net/bluetooth/rfcomm/tty.c:486 [inline]
 rfcomm_dev_ioctl+0x1ba6/0x2220 net/bluetooth/rfcomm/tty.c:588
 rfcomm_sock_ioctl+0x89/0xb0 net/bluetooth/rfcomm/sock.c:902
 sock_do_ioctl+0xe4/0x3e0 net/socket.c:957
 sock_ioctl+0x30d/0x680 net/socket.c:1081
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x1cf/0x16a0 fs/ioctl.c:684
 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:701
 __do_sys_ioctl fs/ioctl.c:708 [inline]
 __se_sys_ioctl fs/ioctl.c:706 [inline]
 __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:706
 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x455389
RSP: 002b:00007fa7c9dd5c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fa7c9dd66d4 RCX: 0000000000455389
RDX: 0000000020000080 RSI: 00000000400452c8 RDI: 0000000000000013
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000016
R13: 00000000000003b3 R14: 00000000006f8968 R15: 0000000000000005
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..