debugfs: Directory '200' with parent 'hci0' already present!
list_add double add: new=ffff88809337a420, prev=ffff88809337a420, next=ffff88821b775a00.
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:29!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 6890 Comm: kworker/u5:3 Not tainted 5.8.0-rc7-next-20200731-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: hci0 hci_rx_work
RIP: 0010:__list_add_valid.cold+0x26/0x3c lib/list_debug.c:29
Code: 57 ff ff ff 4c 89 e1 48 c7 c7 a0 08 94 88 e8 ca 82 be fd 0f 0b 48 89 f2 4c 89 e1 48 89 ee 48 c7 c7 e0 09 94 88 e8 b3 82 be fd <0f> 0b 48 89 f1 48 c7 c7 60 09 94 88 4c 89 e6 e8 9f 82 be fd 0f 0b
RSP: 0018:ffffc90001397830 EFLAGS: 00010282
RAX: 0000000000000058 RBX: ffff88821b775a00 RCX: 0000000000000000
RDX: ffff8880a80f2300 RSI: ffffffff815d86e7 RDI: fffff52000272ef8
RBP: ffff88809337a420 R08: 0000000000000058 R09: ffff8880ae6318a7
R10: 0000000000000000 R11: 0000000000076548 R12: ffff88821b775a00
R13: ffff88808d875288 R14: ffff88809337a438 R15: ffff88809337a420
FS:  0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000480 CR3: 00000000a87f2000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __list_add include/linux/list.h:67 [inline]
 list_add_tail include/linux/list.h:100 [inline]
 kobj_kset_join lib/kobject.c:196 [inline]
 kobject_add_internal+0x18d/0x940 lib/kobject.c:246
 kobject_add_varg lib/kobject.c:390 [inline]
 kobject_add+0x150/0x1c0 lib/kobject.c:442
 device_add+0x35a/0x1c40 drivers/base/core.c:2863
 hci_conn_add_sysfs+0x84/0xe0 net/bluetooth/hci_sysfs.c:53
 hci_conn_complete_evt net/bluetooth/hci_event.c:2620 [inline]
 hci_event_packet+0x1286/0x87a8 net/bluetooth/hci_event.c:6046
 hci_rx_work+0x22e/0xb50 net/bluetooth/hci_core.c:4889
 process_one_work+0x94c/0x1670 kernel/workqueue.c:2269
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415
 kthread+0x3b5/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
Modules linked in:
---[ end trace 9123d7ba102bd210 ]---
RIP: 0010:__list_add_valid.cold+0x26/0x3c lib/list_debug.c:29
Code: 57 ff ff ff 4c 89 e1 48 c7 c7 a0 08 94 88 e8 ca 82 be fd 0f 0b 48 89 f2 4c 89 e1 48 89 ee 48 c7 c7 e0 09 94 88 e8 b3 82 be fd <0f> 0b 48 89 f1 48 c7 c7 60 09 94 88 4c 89 e6 e8 9f 82 be fd 0f 0b
RSP: 0018:ffffc90001397830 EFLAGS: 00010282
RAX: 0000000000000058 RBX: ffff88821b775a00 RCX: 0000000000000000
RDX: ffff8880a80f2300 RSI: ffffffff815d86e7 RDI: fffff52000272ef8
RBP: ffff88809337a420 R08: 0000000000000058 R09: ffff8880ae6318a7
R10: 0000000000000000 R11: 0000000000076548 R12: ffff88821b775a00
R13: ffff88808d875288 R14: ffff88809337a438 R15: ffff88809337a420
FS:  0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000480 CR3: 0000000009a79000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400