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: 0 UID: 0 PID: 5113 Comm: kworker/u9:1 Tainted: G             L      syzkaller #0 PREEMPT_{RT,(full)} 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Workqueue: hci1 hci_rx_work
RIP: 0010:kcov_remote_area_get kernel/kcov.c:142 [inline]
RIP: 0010:kcov_remote_start+0x2a1/0x710 kernel/kcov.c:920
Code: 5e 8d 4c 8b b8 18 44 29 92 bd 00 00 04 00 eb 4f 41 8b ae a4 00 00 00 49 c7 c7 40 96 c2 8d 4d 8b 3f 49 81 ff 40 96 c2 8d 74 4c <41> 39 6f 10 75 ee 4c 89 ff e8 01 70 db 02 84 c0 74 0e 49 8b 07 49
RSP: 0018:ffffc900101afa30 EFLAGS: 00010207
RAX: 0000000000000000 RBX: ffff88803636da00 RCX: 0000000000000000
RDX: 000000002da65a00 RSI: 0000000000000001 RDI: ffffffff8b861520
RBP: 0000000000100000 R08: ffffffff8b14a050 R09: ffffffff8dbcd480
R10: dffffc0000000000 R11: fffffbfff1e9250f R12: 0000000000000002
R13: 0000000000000001 R14: ffff888060592a00 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff888126595000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000010 CR3: 000000003be6c000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 kcov_remote_start_common include/linux/kcov.h:50 [inline]
 hci_rx_work+0x10f/0x1030 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3275 [inline]
 process_scheduled_works+0xaec/0x17a0 kernel/workqueue.c:3358
 worker_thread+0xa50/0xfc0 kernel/workqueue.c:3439
 kthread+0x388/0x470 kernel/kthread.c:467
 ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </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+0x2a1/0x710 kernel/kcov.c:920
Code: 5e 8d 4c 8b b8 18 44 29 92 bd 00 00 04 00 eb 4f 41 8b ae a4 00 00 00 49 c7 c7 40 96 c2 8d 4d 8b 3f 49 81 ff 40 96 c2 8d 74 4c <41> 39 6f 10 75 ee 4c 89 ff e8 01 70 db 02 84 c0 74 0e 49 8b 07 49
RSP: 0018:ffffc900101afa30 EFLAGS: 00010207
RAX: 0000000000000000 RBX: ffff88803636da00 RCX: 0000000000000000
RDX: 000000002da65a00 RSI: 0000000000000001 RDI: ffffffff8b861520
RBP: 0000000000100000 R08: ffffffff8b14a050 R09: ffffffff8dbcd480
R10: dffffc0000000000 R11: fffffbfff1e9250f R12: 0000000000000002
R13: 0000000000000001 R14: ffff888060592a00 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff888126595000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000010 CR3: 000000003be6c000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	5e                   	pop    %rsi
   1:	8d 4c 8b b8          	lea    -0x48(%rbx,%rcx,4),%ecx
   5:	18 44 29 92          	sbb    %al,-0x6e(%rcx,%rbp,1)
   9:	bd 00 00 04 00       	mov    $0x40000,%ebp
   e:	eb 4f                	jmp    0x5f
  10:	41 8b ae a4 00 00 00 	mov    0xa4(%r14),%ebp
  17:	49 c7 c7 40 96 c2 8d 	mov    $0xffffffff8dc29640,%r15
  1e:	4d 8b 3f             	mov    (%r15),%r15
  21:	49 81 ff 40 96 c2 8d 	cmp    $0xffffffff8dc29640,%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 01 70 db 02       	call   0x2db7039
  38:	84 c0                	test   %al,%al
  3a:	74 0e                	je     0x4a
  3c:	49 8b 07             	mov    (%r15),%rax
  3f:	49                   	rex.WB