general protection fault, probably for non-canonical address 0xdffffc000000000e: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000070-0x0000000000000077]
CPU: 1 PID: 16398 Comm: kworker/u5:3 Not tainted 6.8.0-rc1-next-20240125-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Workqueue: hci5 hci_power_on
RIP: 0010:btintel_read_version+0x65/0x1e0 drivers/bluetooth/btintel.c:444
Code: e8 c3 f9 48 81 fb 00 f0 ff ff 0f 87 9e 00 00 00 e8 d0 ed c3 f9 48 8d 7b 70 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e de 00 00 00 8b 6b 70 bf 0a 00
RSP: 0018:ffffc90014187958 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff87c8518e
RDX: 000000000000000e RSI: ffffffff87c851a0 RDI: 0000000000000070
RBP: ffffc90014187a10 R08: 0000000000000007 R09: fffffffffffff000
R10: 0000000000000000 R11: 0000000000000003 R12: ffff88807dcd0000
R13: ffffc900141879f0 R14: ffff88807dcd0000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002001e540 CR3: 000000007d404000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ag6xx_setup+0x1b0/0xc10 drivers/bluetooth/hci_ag6xx.c:169
 hci_uart_setup+0x224/0x4d0 drivers/bluetooth/hci_ldisc.c:423
 hci_dev_setup_sync net/bluetooth/hci_sync.c:4631 [inline]
 hci_dev_init_sync net/bluetooth/hci_sync.c:4699 [inline]
 hci_dev_open_sync+0x35b/0x2650 net/bluetooth/hci_sync.c:4799
 hci_dev_do_open+0x2a/0x90 net/bluetooth/hci_core.c:483
 hci_power_on+0x132/0x670 net/bluetooth/hci_core.c:1015
 process_one_work+0x8d5/0x16e0 kernel/workqueue.c:2633
 process_scheduled_works kernel/workqueue.c:2707 [inline]
 worker_thread+0x8b6/0x1290 kernel/workqueue.c:2788
 kthread+0x2c1/0x3a0 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:242
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:btintel_read_version+0x65/0x1e0 drivers/bluetooth/btintel.c:444
Code: e8 c3 f9 48 81 fb 00 f0 ff ff 0f 87 9e 00 00 00 e8 d0 ed c3 f9 48 8d 7b 70 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e de 00 00 00 8b 6b 70 bf 0a 00
RSP: 0018:ffffc90014187958 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff87c8518e
RDX: 000000000000000e RSI: ffffffff87c851a0 RDI: 0000000000000070
RBP: ffffc90014187a10 R08: 0000000000000007 R09: fffffffffffff000
R10: 0000000000000000 R11: 0000000000000003 R12: ffff88807dcd0000
R13: ffffc900141879f0 R14: ffff88807dcd0000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32623000 CR3: 000000007d404000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	c3                   	ret
   1:	f9                   	stc
   2:	48 81 fb 00 f0 ff ff 	cmp    $0xfffffffffffff000,%rbx
   9:	0f 87 9e 00 00 00    	ja     0xad
   f:	e8 d0 ed c3 f9       	call   0xf9c3ede4
  14:	48 8d 7b 70          	lea    0x70(%rbx),%rdi
  18:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  1f:	fc ff df
  22:	48 89 fa             	mov    %rdi,%rdx
  25:	48 c1 ea 03          	shr    $0x3,%rdx
* 29:	0f b6 04 02          	movzbl (%rdx,%rax,1),%eax <-- trapping instruction
  2d:	84 c0                	test   %al,%al
  2f:	74 08                	je     0x39
  31:	3c 03                	cmp    $0x3,%al
  33:	0f 8e de 00 00 00    	jle    0x117
  39:	8b 6b 70             	mov    0x70(%rbx),%ebp
  3c:	bf                   	.byte 0xbf
  3d:	0a 00                	or     (%rax),%al