general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 1 PID: 5213 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:l2cap_unregister_user+0x27/0x1a0 net/bluetooth/l2cap_core.c:1886
Code: 00 00 00 55 41 57 41 56 41 55 41 54 53 50 48 89 f3 49 89 fe 48 bd 00 00 00 00 00 fc ff df e8 10 b8 91 f8 4c 89 f0 48 c1 e8 03 <80> 3c 28 00 74 08 4c 89 f7 e8 bb da d6 f8 41 bc 60 09 00 00 4d 03
RSP: 0018:ffffc9000369f9b0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff888068d00090 RCX: ffff888023421dc0
RDX: 0000000000000000 RSI: ffff888068d00090 RDI: 0000000000000000
RBP: dffffc0000000000 R08: ffff88802b88d96b R09: 1ffff11005711b2d
R10: dffffc0000000000 R11: ffffed1005711b2e R12: 1ffff920006d3f6b
R13: dffffc0000000000 R14: 0000000000000000 R15: dffffc0000000000
FS:  00007f5806b116c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5806b10ff8 CR3: 0000000055864000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 hidp_connection_del+0xac/0x160 net/bluetooth/hidp/core.c:1435
 do_hidp_sock_ioctl net/bluetooth/hidp/sock.c:96 [inline]
 hidp_sock_ioctl+0x3a7/0x610 net/bluetooth/hidp/sock.c:127
 sock_do_ioctl+0xfb/0x320 net/socket.c:1148
 sock_ioctl+0x48a/0x700 net/socket.c:1267
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:860
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f58074d0e59
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:00007f5806b11028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f580774a090 RCX: 00007f58074d0e59
RDX: 0000200000000000 RSI: 00000000400448c9 RDI: 0000000000000004
RBP: 00007f5807566d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f580774a128 R14: 00007f580774a090 R15: 00007ffc89522a68
 </TASK>
Modules linked in:
---[ end trace 2f298c30824edb67 ]---
RIP: 0010:l2cap_unregister_user+0x27/0x1a0 net/bluetooth/l2cap_core.c:1886
Code: 00 00 00 55 41 57 41 56 41 55 41 54 53 50 48 89 f3 49 89 fe 48 bd 00 00 00 00 00 fc ff df e8 10 b8 91 f8 4c 89 f0 48 c1 e8 03 <80> 3c 28 00 74 08 4c 89 f7 e8 bb da d6 f8 41 bc 60 09 00 00 4d 03
RSP: 0018:ffffc9000369f9b0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff888068d00090 RCX: ffff888023421dc0
RDX: 0000000000000000 RSI: ffff888068d00090 RDI: 0000000000000000
RBP: dffffc0000000000 R08: ffff88802b88d96b R09: 1ffff11005711b2d
R10: dffffc0000000000 R11: ffffed1005711b2e R12: 1ffff920006d3f6b
R13: dffffc0000000000 R14: 0000000000000000 R15: dffffc0000000000
FS:  00007f5806b116c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbf313faff8 CR3: 0000000055864000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	00 00                	add    %al,(%rax)
   2:	00 55 41             	add    %dl,0x41(%rbp)
   5:	57                   	push   %rdi
   6:	41 56                	push   %r14
   8:	41 55                	push   %r13
   a:	41 54                	push   %r12
   c:	53                   	push   %rbx
   d:	50                   	push   %rax
   e:	48 89 f3             	mov    %rsi,%rbx
  11:	49 89 fe             	mov    %rdi,%r14
  14:	48 bd 00 00 00 00 00 	movabs $0xdffffc0000000000,%rbp
  1b:	fc ff df
  1e:	e8 10 b8 91 f8       	call   0xf891b833
  23:	4c 89 f0             	mov    %r14,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	80 3c 28 00          	cmpb   $0x0,(%rax,%rbp,1) <-- trapping instruction
  2e:	74 08                	je     0x38
  30:	4c 89 f7             	mov    %r14,%rdi
  33:	e8 bb da d6 f8       	call   0xf8d6daf3
  38:	41 bc 60 09 00 00    	mov    $0x960,%r12d
  3e:	4d                   	rex.WRB
  3f:	03                   	.byte 0x3