Bluetooth: hci2: Ignoring HCI_Connection_Complete for existing connection
general protection fault, probably for non-canonical address 0xdffffc000000000b: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000058-0x000000000000005f]
CPU: 1 PID: 3657 Comm: kworker/u5:5 Not tainted 6.0.0-rc5-syzkaller-00017-gd1221cea11fc #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
Workqueue: hci2 hci_rx_work
RIP: 0010:klist_next+0x49/0x510 lib/klist.c:377
Code: 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 2e 04 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 2b 48 8d 7d 58 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 33 04 00 00 4c 8d 6b 08 4c 8b 7d 58 48 b8 00 00
RSP: 0018:ffffc90003f4f908 EFLAGS: 00010212
RAX: dffffc0000000000 RBX: ffffc90003f4f980 RCX: ffffc90013f9f000
RDX: 000000000000000b RSI: ffffffff84214236 RDI: 0000000000000058
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000
R13: ffffffff8860bc60 R14: 1ffff920007e9f2c R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f810a7a0000 CR3: 0000000030e1e000 CR4: 0000000000350ee0
Call Trace:
 <TASK>
 next_device drivers/base/core.c:3756 [inline]
 device_find_child+0xba/0x190 drivers/base/core.c:3899
 hci_conn_del_sysfs+0xc7/0x180 net/bluetooth/hci_sysfs.c:71
 hci_conn_cleanup+0x315/0x7b0 net/bluetooth/hci_conn.c:147
 hci_conn_del+0x29b/0x790 net/bluetooth/hci_conn.c:1022
 hci_le_cis_estabilished_evt+0x39f/0xae0 net/bluetooth/hci_event.c:6805
 hci_le_meta_evt+0x2b8/0x510 net/bluetooth/hci_event.c:7110
 hci_event_func net/bluetooth/hci_event.c:7440 [inline]
 hci_event_packet+0x63d/0xfd0 net/bluetooth/hci_event.c:7495
 hci_rx_work+0xae7/0x1230 net/bluetooth/hci_core.c:4007
 process_one_work+0x991/0x1610 kernel/workqueue.c:2289
 worker_thread+0x665/0x1080 kernel/workqueue.c:2436
 kthread+0x2e4/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:klist_next+0x49/0x510 lib/klist.c:377
Code: 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 2e 04 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 2b 48 8d 7d 58 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 33 04 00 00 4c 8d 6b 08 4c 8b 7d 58 48 b8 00 00
RSP: 0018:ffffc90003f4f908 EFLAGS: 00010212
RAX: dffffc0000000000 RBX: ffffc90003f4f980 RCX: ffffc90013f9f000
RDX: 000000000000000b RSI: ffffffff84214236 RDI: 0000000000000058
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000
R13: ffffffff8860bc60 R14: 1ffff920007e9f2c R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f810a7a0000 CR3: 000000001cdbe000 CR4: 0000000000350ee0
----------------
Code disassembly (best guess), 4 bytes skipped:
   0:	48 c1 ea 03          	shr    $0x3,%rdx
   4:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
   8:	0f 85 2e 04 00 00    	jne    0x43c
   e:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  15:	fc ff df
  18:	48 8b 2b             	mov    (%rbx),%rbp
  1b:	48 8d 7d 58          	lea    0x58(%rbp),%rdi
  1f:	48 89 fa             	mov    %rdi,%rdx
  22:	48 c1 ea 03          	shr    $0x3,%rdx
* 26:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2a:	0f 85 33 04 00 00    	jne    0x463
  30:	4c 8d 6b 08          	lea    0x8(%rbx),%r13
  34:	4c 8b 7d 58          	mov    0x58(%rbp),%r15
  38:	48                   	rex.W
  39:	b8                   	.byte 0xb8