Bluetooth: hci1: unexpected cc 0x0c03 length: 249 > 1
Bluetooth: hci1: unexpected cc 0x1003 length: 249 > 9
Bluetooth: hci1: unexpected cc 0x1001 length: 249 > 9
Bluetooth: hci1: unexpected cc 0x0c23 length: 249 > 4
BUG: unable to handle page fault for address: fffff520034a0001
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 23fff5067 P4D 23fff5067 PUD 1b295067 PMD 5aa78067 PTE 0
Oops: Oops: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 5825 Comm: kworker/u9:3 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Workqueue: hci1 hci_rx_work
RIP: 0010:__list_del_entry_valid_or_report+0xa6/0x190 lib/list_debug.c:65
Code: 4d 89 fc 49 c1 ec 03 43 80 3c 2c 00 74 08 4c 89 ff e8 0e 20 80 fd 49 39 1f 0f 85 92 00 00 00 4d 8d 7e 08 4d 89 fc 49 c1 ec 03 <43> 80 3c 2c 00 74 08 4c 89 ff e8 eb 1f 80 fd 49 39 1f 0f 85 9e 00
RSP: 0018:ffffc900046579e0 EFLAGS: 00010a02
RAX: 1ffff920038a0800 RBX: ffffc9001c504000 RCX: 0000000000000000
RDX: 000000001ec7f800 RSI: 0000000000000001 RDI: ffffc9001c504008
RBP: 0000000000100000 R08: ffffffff8b2ee740 R09: ffffffff8dfc80c0
R10: dffffc0000000000 R11: fffffbfff1f178bf R12: 1ffff920034a0001
R13: dffffc0000000000 R14: ffffc9001a500000 R15: ffffc9001a500008
FS:  0000000000000000(0000) GS:ffff8881260fe000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffff520034a0001 CR3: 0000000061088000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 __list_del_entry_valid include/linux/list.h:132 [inline]
 __list_del_entry include/linux/list.h:223 [inline]
 list_del include/linux/list.h:237 [inline]
 kcov_remote_area_get kernel/kcov.c:143 [inline]
 kcov_remote_start+0x2af/0x710 kernel/kcov.c:920
 kcov_remote_start_common include/linux/kcov.h:50 [inline]
 hci_rx_work+0x10f/0x1040 net/bluetooth/hci_core.c:4040
 process_one_work kernel/workqueue.c:3302 [inline]
 process_scheduled_works+0xb5d/0x1860 kernel/workqueue.c:3385
 worker_thread+0xa53/0xfc0 kernel/workqueue.c:3466
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Modules linked in:
CR2: fffff520034a0001
---[ end trace 0000000000000000 ]---
RIP: 0010:__list_del_entry_valid_or_report+0xa6/0x190 lib/list_debug.c:65
Code: 4d 89 fc 49 c1 ec 03 43 80 3c 2c 00 74 08 4c 89 ff e8 0e 20 80 fd 49 39 1f 0f 85 92 00 00 00 4d 8d 7e 08 4d 89 fc 49 c1 ec 03 <43> 80 3c 2c 00 74 08 4c 89 ff e8 eb 1f 80 fd 49 39 1f 0f 85 9e 00
RSP: 0018:ffffc900046579e0 EFLAGS: 00010a02
RAX: 1ffff920038a0800 RBX: ffffc9001c504000 RCX: 0000000000000000
RDX: 000000001ec7f800 RSI: 0000000000000001 RDI: ffffc9001c504008
RBP: 0000000000100000 R08: ffffffff8b2ee740 R09: ffffffff8dfc80c0
R10: dffffc0000000000 R11: fffffbfff1f178bf R12: 1ffff920034a0001
R13: dffffc0000000000 R14: ffffc9001a500000 R15: ffffc9001a500008
FS:  0000000000000000(0000) GS:ffff8881260fe000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffff520034a0001 CR3: 0000000061088000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	4d 89 fc             	mov    %r15,%r12
   3:	49 c1 ec 03          	shr    $0x3,%r12
   7:	43 80 3c 2c 00       	cmpb   $0x0,(%r12,%r13,1)
   c:	74 08                	je     0x16
   e:	4c 89 ff             	mov    %r15,%rdi
  11:	e8 0e 20 80 fd       	call   0xfd802024
  16:	49 39 1f             	cmp    %rbx,(%r15)
  19:	0f 85 92 00 00 00    	jne    0xb1
  1f:	4d 8d 7e 08          	lea    0x8(%r14),%r15
  23:	4d 89 fc             	mov    %r15,%r12
  26:	49 c1 ec 03          	shr    $0x3,%r12
* 2a:	43 80 3c 2c 00       	cmpb   $0x0,(%r12,%r13,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	4c 89 ff             	mov    %r15,%rdi
  34:	e8 eb 1f 80 fd       	call   0xfd802024
  39:	49 39 1f             	cmp    %rbx,(%r15)
  3c:	0f                   	.byte 0xf
  3d:	85                   	.byte 0x85
  3e:	9e                   	sahf