kobject: kobject_add_internal failed for hci3:201 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci3: failed to register connection device
general protection fault, probably for non-canonical address 0xdffffc0000000026: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000130-0x0000000000000137]
CPU: 1 PID: 5796 Comm: kworker/u5:5 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Workqueue: hci3 hci_rx_work
RIP: 0010:__lock_acquire+0xeb/0x7c80 kernel/locking/lockdep.c:5005
Code: 85 dc 66 00 00 83 3d 2f be e3 0c 00 48 89 9c 24 f0 00 00 00 0f 84 11 10 00 00 83 3d fe d5 58 0b 00 74 36 48 89 f8 48 c1 e8 03 <42> 80 3c 00 00 74 1f 48 8b bc 24 88 00 00 00 e8 61 e8 75 00 48 8b
RSP: 0018:ffffc900044ff160 EFLAGS: 00010002
RAX: 0000000000000026 RBX: 1ffff9200089fe50 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000130
RBP: ffffc900044ff3a8 R08: dffffc0000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1c9506e R12: 0000000000000001
R13: 0000000000000000 R14: ffff8880797d5a00 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd6ab1721e0 CR3: 000000002e8ec000 CR4: 00000000003526e0
Call Trace:
 <TASK>
 lock_acquire+0x197/0x410 kernel/locking/lockdep.c:5754
 lock_sock_nested+0x48/0x100 net/core/sock.c:3532
 lock_sock include/net/sock.h:1767 [inline]
 l2cap_sock_ready_cb+0x45/0x130 net/bluetooth/l2cap_sock.c:1661
 l2cap_chan_ready net/bluetooth/l2cap_core.c:1263 [inline]
 l2cap_le_start+0xaf3/0x1370 net/bluetooth/l2cap_core.c:1375
 l2cap_conn_ready net/bluetooth/l2cap_core.c:1628 [inline]
 l2cap_connect_cfm+0x6b9/0x1030 net/bluetooth/l2cap_core.c:7275
 hci_connect_cfm+0x8f/0x130 include/net/bluetooth/hci_core.h:1991
 le_conn_complete_evt+0xfb5/0x1500 net/bluetooth/hci_event.c:5772
 hci_le_conn_complete_evt+0x187/0x440 net/bluetooth/hci_event.c:5798
 hci_event_func net/bluetooth/hci_event.c:7440 [inline]
 hci_event_packet+0x795/0x1210 net/bluetooth/hci_event.c:7495
 hci_rx_work+0x43a/0xd80 net/bluetooth/hci_core.c:4018
 process_one_work kernel/workqueue.c:2634 [inline]
 process_scheduled_works+0xa45/0x15b0 kernel/workqueue.c:2711
 worker_thread+0xa55/0xfc0 kernel/workqueue.c:2792
 kthread+0x2fa/0x390 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__lock_acquire+0xeb/0x7c80 kernel/locking/lockdep.c:5005
Code: 85 dc 66 00 00 83 3d 2f be e3 0c 00 48 89 9c 24 f0 00 00 00 0f 84 11 10 00 00 83 3d fe d5 58 0b 00 74 36 48 89 f8 48 c1 e8 03 <42> 80 3c 00 00 74 1f 48 8b bc 24 88 00 00 00 e8 61 e8 75 00 48 8b
RSP: 0018:ffffc900044ff160 EFLAGS: 00010002
RAX: 0000000000000026 RBX: 1ffff9200089fe50 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000130
RBP: ffffc900044ff3a8 R08: dffffc0000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1c9506e R12: 0000000000000001
R13: 0000000000000000 R14: ffff8880797d5a00 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd6ab1721e0 CR3: 000000002e8ec000 CR4: 00000000003526e0
----------------
Code disassembly (best guess):
   0:	85 dc                	test   %ebx,%esp
   2:	66 00 00             	data16 add %al,(%rax)
   5:	83 3d 2f be e3 0c 00 	cmpl   $0x0,0xce3be2f(%rip)        # 0xce3be3b
   c:	48 89 9c 24 f0 00 00 	mov    %rbx,0xf0(%rsp)
  13:	00
  14:	0f 84 11 10 00 00    	je     0x102b
  1a:	83 3d fe d5 58 0b 00 	cmpl   $0x0,0xb58d5fe(%rip)        # 0xb58d61f
  21:	74 36                	je     0x59
  23:	48 89 f8             	mov    %rdi,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 00 00       	cmpb   $0x0,(%rax,%r8,1) <-- trapping instruction
  2f:	74 1f                	je     0x50
  31:	48 8b bc 24 88 00 00 	mov    0x88(%rsp),%rdi
  38:	00
  39:	e8 61 e8 75 00       	call   0x75e89f
  3e:	48                   	rex.W
  3f:	8b                   	.byte 0x8b