kthread+0x28d/0x320 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
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: 0 PID: 4268 Comm: kworker/u5:8 Not tainted 6.1.123-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: hci3 hci_rx_work
RIP: 0010:__lock_acquire+0x69/0x1f80 kernel/locking/lockdep.c:4919
Code: df 0f b6 04 10 84 c0 0f 85 fb 15 00 00 83 3d d1 93 30 0d 00 0f 84 a8 14 00 00 83 3d 10 e9 b4 0b 00 74 2b 4c 89 f0 48 c1 e8 03 <80> 3c 10 00 74 12 4c 89 f7 e8 89 87 77 00 48 ba 00 00 00 00 00 fc
RSP: 0018:ffffc90003ec74a0 EFLAGS: 00010002
RAX: 0000000000000026 RBX: 0000000000000000 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000130
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: ffff888030c18000 R14: 0000000000000130 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fde46577bac CR3: 000000002a983000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
 lock_sock_nested+0x44/0x100 net/core/sock.c:3485
 lock_sock include/net/sock.h:1756 [inline]
 l2cap_sock_new_connection_cb+0x46/0x2c0 net/bluetooth/l2cap_sock.c:1493
 l2cap_connect_cfm+0x36b/0x1270 net/bluetooth/l2cap_core.c:8317
 hci_connect_cfm+0x9e/0x150 include/net/bluetooth/hci_core.h:1787
 le_conn_complete_evt+0xd54/0x1320 net/bluetooth/hci_event.c:5864
 hci_le_conn_complete_evt+0x188/0x410 net/bluetooth/hci_event.c:5890
 hci_event_func net/bluetooth/hci_event.c:7370 [inline]
 hci_event_packet+0xa40/0x1510 net/bluetooth/hci_event.c:7425
 hci_rx_work+0x3a6/0xd10 net/bluetooth/hci_core.c:4090
 process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292
 worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
 kthread+0x28d/0x320 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__lock_acquire+0x69/0x1f80 kernel/locking/lockdep.c:4919
Code: df 0f b6 04 10 84 c0 0f 85 fb 15 00 00 83 3d d1 93 30 0d 00 0f 84 a8 14 00 00 83 3d 10 e9 b4 0b 00 74 2b 4c 89 f0 48 c1 e8 03 <80> 3c 10 00 74 12 4c 89 f7 e8 89 87 77 00 48 ba 00 00 00 00 00 fc
RSP: 0018:ffffc90003ec74a0 EFLAGS: 00010002
RAX: 0000000000000026 RBX: 0000000000000000 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000130
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: ffff888030c18000 R14: 0000000000000130 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fde46577bac CR3: 000000002a983000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	df 0f                	fisttps (%rdi)
   2:	b6 04                	mov    $0x4,%dh
   4:	10 84 c0 0f 85 fb 15 	adc    %al,0x15fb850f(%rax,%rax,8)
   b:	00 00                	add    %al,(%rax)
   d:	83 3d d1 93 30 0d 00 	cmpl   $0x0,0xd3093d1(%rip)        # 0xd3093e5
  14:	0f 84 a8 14 00 00    	je     0x14c2
  1a:	83 3d 10 e9 b4 0b 00 	cmpl   $0x0,0xbb4e910(%rip)        # 0xbb4e931
  21:	74 2b                	je     0x4e
  23:	4c 89 f0             	mov    %r14,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	80 3c 10 00          	cmpb   $0x0,(%rax,%rdx,1) <-- trapping instruction
  2e:	74 12                	je     0x42
  30:	4c 89 f7             	mov    %r14,%rdi
  33:	e8 89 87 77 00       	call   0x7787c1
  38:	48                   	rex.W
  39:	ba 00 00 00 00       	mov    $0x0,%edx
  3e:	00 fc                	add    %bh,%ah