BUG: kernel NULL pointer dereference, address: 0000000000000010
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 0 P4D 0 
Oops: Oops: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 5814 Comm: kworker/u9:2 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: hci0 hci_rx_work
RIP: 0010:kcov_remote_area_get kernel/kcov.c:142 [inline]
RIP: 0010:kcov_remote_start+0x2a2/0x710 kernel/kcov.c:906
Code: 01 8d 4c 8b b8 98 a3 b3 91 bd 00 00 04 00 eb 4f 41 8b ae a4 00 00 00 49 c7 c7 20 42 60 8d 4d 8b 3f 49 81 ff 20 42 60 8d 74 4c <41> 39 6f 10 75 ee 4c 89 ff e8 d0 af c7 02 84 c0 74 0e 49 8b 07 49
RSP: 0018:ffffc90004d3f9b0 EFLAGS: 00010203
RAX: 0000000000000000 RBX: ffff8880327c0000 RCX: 0000000000000000
RDX: 00000000edc96200 RSI: 0000000000000001 RDI: ffffffff8b3f5700
RBP: 0000000000100000 R08: ffffffff8ad3f021 R09: ffffffff8d5ae940
R10: dffffc0000000000 R11: fffffbfff1db66af R12: 0000000000000002
R13: 0000000000000001 R14: ffff88803b830500 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff888126def000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000010 CR3: 000000006d7ec000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 kcov_remote_start_common include/linux/kcov.h:50 [inline]
 hci_rx_work+0x10f/0x1060 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3257 [inline]
 process_scheduled_works+0xad1/0x1770 kernel/workqueue.c:3340
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3421
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x510/0xa50 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>
Modules linked in:
CR2: 0000000000000010
---[ end trace 0000000000000000 ]---
RIP: 0010:kcov_remote_area_get kernel/kcov.c:142 [inline]
RIP: 0010:kcov_remote_start+0x2a2/0x710 kernel/kcov.c:906
Code: 01 8d 4c 8b b8 98 a3 b3 91 bd 00 00 04 00 eb 4f 41 8b ae a4 00 00 00 49 c7 c7 20 42 60 8d 4d 8b 3f 49 81 ff 20 42 60 8d 74 4c <41> 39 6f 10 75 ee 4c 89 ff e8 d0 af c7 02 84 c0 74 0e 49 8b 07 49
RSP: 0018:ffffc90004d3f9b0 EFLAGS: 00010203
RAX: 0000000000000000 RBX: ffff8880327c0000 RCX: 0000000000000000
RDX: 00000000edc96200 RSI: 0000000000000001 RDI: ffffffff8b3f5700
RBP: 0000000000100000 R08: ffffffff8ad3f021 R09: ffffffff8d5ae940
R10: dffffc0000000000 R11: fffffbfff1db66af R12: 0000000000000002
R13: 0000000000000001 R14: ffff88803b830500 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff888126def000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000010 CR3: 000000006d7ec000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	01 8d 4c 8b b8 98    	add    %ecx,-0x674774b4(%rbp)
   6:	a3 b3 91 bd 00 00 04 	movabs %eax,0xeb00040000bd91b3
   d:	00 eb
   f:	4f                   	rex.WRXB
  10:	41 8b ae a4 00 00 00 	mov    0xa4(%r14),%ebp
  17:	49 c7 c7 20 42 60 8d 	mov    $0xffffffff8d604220,%r15
  1e:	4d 8b 3f             	mov    (%r15),%r15
  21:	49 81 ff 20 42 60 8d 	cmp    $0xffffffff8d604220,%r15
  28:	74 4c                	je     0x76
* 2a:	41 39 6f 10          	cmp    %ebp,0x10(%r15) <-- trapping instruction
  2e:	75 ee                	jne    0x1e
  30:	4c 89 ff             	mov    %r15,%rdi
  33:	e8 d0 af c7 02       	call   0x2c7b008
  38:	84 c0                	test   %al,%al
  3a:	74 0e                	je     0x4a
  3c:	49 8b 07             	mov    (%r15),%rax
  3f:	49                   	rex.WB