Bluetooth: hci0: Controller not accepting commands anymore: ncmd = 0
Bluetooth: hci0: Injecting HCI hardware error event
Bluetooth: hci0: hardware error 0x00
BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 0 P4D 0 
Oops: 0000 [#1] PREEMPT SMP PTI
CPU: 0 PID: 1414 Comm: kworker/u5:2 Not tainted 6.6.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Workqueue: hci0 hci_error_reset
RIP: 0010:variable_test_bit arch/x86/include/asm/bitops.h:228 [inline]
RIP: 0010:arch_test_bit arch/x86/include/asm/bitops.h:240 [inline]
RIP: 0010:_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:142 [inline]
RIP: 0010:ida_free+0x8c/0x150 lib/idr.c:511
Code: 88 ba 00 00 00 89 f5 89 f3 81 e3 ff 03 00 00 e8 5a 20 05 00 49 89 c6 48 89 e7 e8 ff 3d 02 00 49 89 c7 41 f6 c7 01 75 35 89 d8 <49> 0f a3 07 73 57 49 0f b3 07 48 89 e7 31 f6 e8 40 4d 02 00 be 00
RSP: 0018:ffffc9000103bd00 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000003
RDX: 6612725794df5284 RSI: ffffffff832fad87 RDI: ffffc9000103bd00
RBP: 0000000000002000 R08: 00000003fffffffc R09: 0000000000000402
R10: 0000000000000000 R11: 0000000000000000 R12: ffff888100ac8338
R13: ffff888109e61800 R14: 0000000000000286 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000101bd6000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 hci_conn_cleanup net/bluetooth/hci_conn.c:157 [inline]
 hci_conn_del+0x1e3/0x2f0 net/bluetooth/hci_conn.c:1184
 hci_conn_hash_flush+0xa0/0xe0 net/bluetooth/hci_conn.c:2617
 hci_dev_close_sync+0x305/0x610 net/bluetooth/hci_sync.c:5021
 hci_dev_do_close net/bluetooth/hci_core.c:554 [inline]
 hci_error_reset+0x7b/0x130 net/bluetooth/hci_core.c:1059
 process_one_work kernel/workqueue.c:2630 [inline]
 process_scheduled_works+0x278/0x580 kernel/workqueue.c:2703
 worker_thread+0x267/0x360 kernel/workqueue.c:2784
 kthread+0xf4/0x110 kernel/kthread.c:388
 ret_from_fork+0x32/0x40 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:304
 </TASK>
Modules linked in:
CR2: 0000000000000000
---[ end trace 0000000000000000 ]---
RIP: 0010:variable_test_bit arch/x86/include/asm/bitops.h:228 [inline]
RIP: 0010:arch_test_bit arch/x86/include/asm/bitops.h:240 [inline]
RIP: 0010:_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:142 [inline]
RIP: 0010:ida_free+0x8c/0x150 lib/idr.c:511
Code: 88 ba 00 00 00 89 f5 89 f3 81 e3 ff 03 00 00 e8 5a 20 05 00 49 89 c6 48 89 e7 e8 ff 3d 02 00 49 89 c7 41 f6 c7 01 75 35 89 d8 <49> 0f a3 07 73 57 49 0f b3 07 48 89 e7 31 f6 e8 40 4d 02 00 be 00
RSP: 0018:ffffc9000103bd00 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000003
RDX: 6612725794df5284 RSI: ffffffff832fad87 RDI: ffffc9000103bd00
RBP: 0000000000002000 R08: 00000003fffffffc R09: 0000000000000402
R10: 0000000000000000 R11: 0000000000000000 R12: ffff888100ac8338
R13: ffff888109e61800 R14: 0000000000000286 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000101bd6000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	88 ba 00 00 00 89    	mov    %bh,-0x77000000(%rdx)
   6:	f5                   	cmc
   7:	89 f3                	mov    %esi,%ebx
   9:	81 e3 ff 03 00 00    	and    $0x3ff,%ebx
   f:	e8 5a 20 05 00       	call   0x5206e
  14:	49 89 c6             	mov    %rax,%r14
  17:	48 89 e7             	mov    %rsp,%rdi
  1a:	e8 ff 3d 02 00       	call   0x23e1e
  1f:	49 89 c7             	mov    %rax,%r15
  22:	41 f6 c7 01          	test   $0x1,%r15b
  26:	75 35                	jne    0x5d
  28:	89 d8                	mov    %ebx,%eax
* 2a:	49 0f a3 07          	bt     %rax,(%r15) <-- trapping instruction
  2e:	73 57                	jae    0x87
  30:	49 0f b3 07          	btr    %rax,(%r15)
  34:	48 89 e7             	mov    %rsp,%rdi
  37:	31 f6                	xor    %esi,%esi
  39:	e8 40 4d 02 00       	call   0x24d7e
  3e:	be                   	.byte 0xbe