Oops: general protection fault, probably for non-canonical address 0xdffffc000000006e: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000370-0x0000000000000377]
CPU: 1 UID: 0 PID: 6369 Comm: syz.4.113 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:kasan_byte_accessible+0x12/0x30 mm/kasan/generic.c:210
Code: 79 ff ff ff 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 48 c1 ef 03 48 b8 00 00 00 00 00 fc ff df <0f> b6 04 07 3c 08 0f 92 c0 c3 cc cc cc cc cc 66 66 66 66 66 66 2e
RSP: 0018:ffffc90003877880 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffffffff8b1e1f3a RCX: 0000000080000001
RDX: 0000000000000000 RSI: ffffffff8b1e1f3a RDI: 000000000000006e
RBP: ffffffff8a1a6b06 R08: 0000000000000001 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed10089613de R12: 0000000000000000
R13: 0000000000000370 R14: 0000000000000370 R15: 0000000000000001
FS:  00007fa5384cd6c0(0000) GS:ffff88812627d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa5384ccff8 CR3: 000000003c8ea000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 __kasan_check_byte+0x12/0x40 mm/kasan/common.c:573
 kasan_check_byte include/linux/kasan.h:402 [inline]
 lock_acquire+0x84/0x350 kernel/locking/lockdep.c:5842
 __mutex_lock_common kernel/locking/rtmutex_api.c:534 [inline]
 mutex_lock_nested+0x5a/0x1d0 kernel/locking/rtmutex_api.c:553
 l2cap_unregister_user+0x36/0x170 net/bluetooth/l2cap_core.c:1740
 hidp_connection_del+0xb0/0x170 net/bluetooth/hidp/core.c:1421
 do_hidp_sock_ioctl net/bluetooth/hidp/sock.c:97 [inline]
 hidp_sock_ioctl+0x3ab/0x650 net/bluetooth/hidp/sock.c:128
 sock_do_ioctl+0x101/0x320 net/socket.c:1313
 sock_ioctl+0x5c9/0x7f0 net/socket.c:1434
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl+0xff/0x170 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa538e8cdd9
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:00007fa5384cd028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fa539106090 RCX: 00007fa538e8cdd9
RDX: 0000200000000000 RSI: 00000000400448c9 RDI: 0000000000000004
RBP: 00007fa538f22d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa539106128 R14: 00007fa539106090 R15: 00007fff229a37c8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:kasan_byte_accessible+0x12/0x30 mm/kasan/generic.c:210
Code: 79 ff ff ff 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 48 c1 ef 03 48 b8 00 00 00 00 00 fc ff df <0f> b6 04 07 3c 08 0f 92 c0 c3 cc cc cc cc cc 66 66 66 66 66 66 2e
RSP: 0018:ffffc90003877880 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffffffff8b1e1f3a RCX: 0000000080000001
RDX: 0000000000000000 RSI: ffffffff8b1e1f3a RDI: 000000000000006e
RBP: ffffffff8a1a6b06 R08: 0000000000000001 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed10089613de R12: 0000000000000000
R13: 0000000000000370 R14: 0000000000000370 R15: 0000000000000001
FS:  00007fa5384cd6c0(0000) GS:ffff88812627d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa5384ccff8 CR3: 000000003c8ea000 CR4: 00000000003526f0
----------------
Code disassembly (best guess), 4 bytes skipped:
   0:	0f 1f 40 00          	nopl   0x0(%rax)
   4:	90                   	nop
   5:	90                   	nop
   6:	90                   	nop
   7:	90                   	nop
   8:	90                   	nop
   9:	90                   	nop
   a:	90                   	nop
   b:	90                   	nop
   c:	90                   	nop
   d:	90                   	nop
   e:	90                   	nop
   f:	90                   	nop
  10:	90                   	nop
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	0f 1f 40 d6          	nopl   -0x2a(%rax)
  18:	48 c1 ef 03          	shr    $0x3,%rdi
  1c:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  23:	fc ff df
* 26:	0f b6 04 07          	movzbl (%rdi,%rax,1),%eax <-- trapping instruction
  2a:	3c 08                	cmp    $0x8,%al
  2c:	0f 92 c0             	setb   %al
  2f:	c3                   	ret
  30:	cc                   	int3
  31:	cc                   	int3
  32:	cc                   	int3
  33:	cc                   	int3
  34:	cc                   	int3
  35:	66                   	data16
  36:	66                   	data16
  37:	66                   	data16
  38:	66                   	data16
  39:	66                   	data16
  3a:	66                   	data16
  3b:	2e                   	cs