Bluetooth: Can't register HCI device
kobject_add_internal failed for hci1 (error: -2 parent: bluetooth)
Bluetooth: Can't register HCI device
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
kobject: 'loop4' (00000000a65693e8): kobject_uevent_env
CPU: 0 PID: 8120 Comm: syz-executor.0 Not tainted 5.0.0-rc6+ #69
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:kernfs_add_one+0x343/0x4d0 fs/kernfs/dir.c:812
Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 52 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 5b 70 48 8d 7b 08 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 1f 01 00 00 8b 5b 08 31 ff 83
RSP: 0018:ffff88808db67858 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff87022ab8
RDX: 0000000000000001 RSI: ffffffff81d251db RDI: 0000000000000008
RBP: ffff88808db67898 R08: 1ffffffff1151204 R09: fffffbfff1151205
R10: fffffbfff1151204 R11: ffffffff88a89027 R12: ffff888094c0cee0
R13: ffff888094c0cee0 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f9751f8a700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000025befd0 CR3: 0000000086f05000 CR4: 00000000001406f0
kobject: 'rfkill201' (00000000e69c2b64): kobject_uevent_env
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
kobject: 'loop4' (00000000a65693e8): fill_kobj_path: path = '/devices/virtual/block/loop4'
 kernfs_create_dir_ns+0xff/0x160 fs/kernfs/dir.c:1031
 sysfs_create_dir_ns+0x131/0x2a0 fs/sysfs/dir.c:59
kobject: 'hci1' (0000