Bluetooth: hci4: Opcode 0x0c1a failed: -4
Bluetooth: hci4: Error when powering off device on rfkill (-4)
Bluetooth: hci3: Opcode 0x0c1a failed: -4
Bluetooth: hci3: Error when powering off device on rfkill (-4)
------------[ cut here ]------------
rtmutex deadlock detected
WARNING: kernel/locking/rtmutex.c:1674 at 0x0, CPU#0: syz.7.3768/16021
Modules linked in:
CPU: 0 UID: 0 PID: 16021 Comm: syz.7.3768 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:rt_mutex_handle_deadlock+0x21/0xb0 kernel/locking/rtmutex.c:1674
Code: 90 90 90 90 90 90 90 90 90 41 57 41 56 41 55 41 54 53 83 ff dd 0f 85 86 00 00 00 48 89 f7 e8 a6 3b 01 00 48 8d 3d ef c2 19 04 <67> 48 0f b9 3a 4c 8d 3d 00 00 00 00 65 48 8b 1c 25 08 f0 a9 91 4c
RSP: 0018:ffffc900050df950 EFLAGS: 00010286
RAX: 0000000080000000 RBX: ffffc900050df9e0 RCX: 0000000000000000
RDX: 0000000000000006 RSI: ffffffff8cde6eea RDI: ffffffff8edc7190
RBP: ffffc900050dfb00 R08: ffffffff8ed95177 R09: 1ffffffff1db2a2e
R10: dffffc0000000000 R11: fffffbfff1db2a2f R12: 1ffff92000a1bf38
R13: ffffffff8ac2a989 R14: ffff88806911c098 R15: dffffc0000000000
FS:  00007f07bde366c0(0000) GS:ffff888126d81000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b34f22ff8 CR3: 0000000055fc8000 CR4: 00000000003526f0
DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000083
DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __rt_mutex_slowlock kernel/locking/rtmutex.c:1734 [inline]
 __rt_mutex_slowlock_locked kernel/locking/rtmutex.c:1760 [inline]
 rt_mutex_slowlock+0x666/0x6b0 kernel/locking/rtmutex.c:1800
 __rt_mutex_lock kernel/locking/rtmutex.c:1815 [inline]
 __mutex_lock_common kernel/locking/rtmutex_api.c:534 [inline]
 mutex_lock_nested+0x16a/0x1d0 kernel/locking/rtmutex_api.c:552
 device_lock include/linux/device.h:914 [inline]
 nfc_dev_down net/nfc/core.c:143 [inline]
 nfc_rfkill_set_block+0x50/0x2e0 net/nfc/core.c:179
 rfkill_set_block+0x1e5/0x450 net/rfkill/core.c:346
 rfkill_fop_write+0x44e/0x580 net/rfkill/core.c:1301
 vfs_write+0x287/0xb40 fs/read_write.c:684
 ksys_write+0x14b/0x260 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f07bfbcf749
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f07bde36038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f07bfe25fa0 RCX: 00007f07bfbcf749
RDX: 0000000000000008 RSI: 0000200000000080 RDI: 0000000000000003
RBP: 00007f07bfc53f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f07bfe26038 R14: 00007f07bfe25fa0 R15: 00007ffecb28f4b8
 </TASK>
----------------
Code disassembly (best guess):
   0:	90                   	nop
   1:	90                   	nop
   2:	90                   	nop
   3:	90                   	nop
   4:	90                   	nop
   5:	90                   	nop
   6:	90                   	nop
   7:	90                   	nop
   8:	90                   	nop
   9:	41 57                	push   %r15
   b:	41 56                	push   %r14
   d:	41 55                	push   %r13
   f:	41 54                	push   %r12
  11:	53                   	push   %rbx
  12:	83 ff dd             	cmp    $0xffffffdd,%edi
  15:	0f 85 86 00 00 00    	jne    0xa1
  1b:	48 89 f7             	mov    %rsi,%rdi
  1e:	e8 a6 3b 01 00       	call   0x13bc9
  23:	48 8d 3d ef c2 19 04 	lea    0x419c2ef(%rip),%rdi        # 0x419c319
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	4c 8d 3d 00 00 00 00 	lea    0x0(%rip),%r15        # 0x36
  36:	65 48 8b 1c 25 08 f0 	mov    %gs:0xffffffff91a9f008,%rbx
  3d:	a9 91
  3f:	4c                   	rex.WR