Bluetooth: hci4: Opcode 0x0c1a failed: -4
Bluetooth: hci4: Error when powering off device on rfkill (-4)
Bluetooth: hci2: Opcode 0x0c1a failed: -4
Bluetooth: hci2: Error when powering off device on rfkill (-4)
------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(1)
WARNING: kernel/locking/lockdep.c:238 at hlock_class kernel/locking/lockdep.c:238 [inline], CPU#0: syz.3.184/6611
WARNING: kernel/locking/lockdep.c:238 at check_deadlock kernel/locking/lockdep.c:3070 [inline], CPU#0: syz.3.184/6611
WARNING: kernel/locking/lockdep.c:238 at validate_chain kernel/locking/lockdep.c:3895 [inline], CPU#0: syz.3.184/6611
WARNING: kernel/locking/lockdep.c:238 at __lock_acquire+0x12ed/0x2cf0 kernel/locking/lockdep.c:5237, CPU#0: syz.3.184/6611
Modules linked in:
CPU: 0 UID: 0 PID: 6611 Comm: syz.3.184 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/13/2026
RIP: 0010:hlock_class kernel/locking/lockdep.c:238 [inline]
RIP: 0010:check_deadlock kernel/locking/lockdep.c:3070 [inline]
RIP: 0010:validate_chain kernel/locking/lockdep.c:3895 [inline]
RIP: 0010:__lock_acquire+0x12f4/0x2cf0 kernel/locking/lockdep.c:5237
Code: 83 3d bf 73 3b 18 00 75 27 90 e8 c7 7d f5 02 85 c0 74 1c 83 3d 30 d7 2f 0e 00 75 13 48 8d 3d 53 eb 32 0e 48 c7 c6 4e fd be 8d <67> 48 0f b9 3a 90 31 c0 48 39 c3 0f 85 21 ff ff ff 48 8b 44 24 10
RSP: 0018:ffffc900033f7680 EFLAGS: 00010046
RAX: 0000000000000001 RBX: ffffffff93799b18 RCX: 0000000000080000
RDX: ffffc9000d53e000 RSI: ffffffff8dbefd4e RDI: ffffffff8fd21bd0
RBP: ec8bffb3d3005e50 R08: ffffffff8fcf07a3 R09: 1ffffffff1f9e0f4
R10: dffffc0000000000 R11: fffffbfff1f9e0f5 R12: ffff88802a914830
R13: 0000000000000000 R14: ffff88802a913d00 R15: 0000000000000000
FS:  00007f83275946c0(0000) GS:ffff88812592a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7967a95ff8 CR3: 000000007f802000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 lock_acquire+0x106/0x330 kernel/locking/lockdep.c:5868
 touch_wq_lockdep_map+0xcb/0x180 kernel/workqueue.c:3940
 __flush_workqueue+0x14b/0x14f0 kernel/workqueue.c:3982
 nci_close_device+0x302/0x630 net/nfc/nci/core.c:567
 nci_dev_down+0x3b/0x50 net/nfc/nci/core.c:639
 nfc_dev_down+0x152/0x290 net/nfc/core.c:161
 nfc_rfkill_set_block+0x2d/0x100 net/nfc/core.c:179
 rfkill_set_block+0x1d2/0x440 net/rfkill/core.c:346
 rfkill_fop_write+0x461/0x5a0 net/rfkill/core.c:1301
 vfs_write+0x29a/0xb90 fs/read_write.c:684
 ksys_write+0x150/0x270 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f832679acb9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f8327594028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f8326a16090 RCX: 00007f832679acb9
RDX: 0000000000000008 RSI: 0000200000000080 RDI: 0000000000000006
RBP: 00007f8326808bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8326a16128 R14: 00007f8326a16090 R15: 00007ffc7cf82408
 </TASK>
----------------
Code disassembly (best guess):
   0:	83 3d bf 73 3b 18 00 	cmpl   $0x0,0x183b73bf(%rip)        # 0x183b73c6
   7:	75 27                	jne    0x30
   9:	90                   	nop
   a:	e8 c7 7d f5 02       	call   0x2f57dd6
   f:	85 c0                	test   %eax,%eax
  11:	74 1c                	je     0x2f
  13:	83 3d 30 d7 2f 0e 00 	cmpl   $0x0,0xe2fd730(%rip)        # 0xe2fd74a
  1a:	75 13                	jne    0x2f
  1c:	48 8d 3d 53 eb 32 0e 	lea    0xe32eb53(%rip),%rdi        # 0xe32eb76
  23:	48 c7 c6 4e fd be 8d 	mov    $0xffffffff8dbefd4e,%rsi
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	90                   	nop
  30:	31 c0                	xor    %eax,%eax
  32:	48 39 c3             	cmp    %rax,%rbx
  35:	0f 85 21 ff ff ff    	jne    0xffffff5c
  3b:	48 8b 44 24 10       	mov    0x10(%rsp),%rax