general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 0 PID: 4663 Comm: syz.4.100 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:l2cap_unregister_user+0x27/0x1a0 net/bluetooth/l2cap_core.c:1869
Code: 1f 40 00 55 41 57 41 56 41 55 41 54 53 50 48 89 f3 49 89 fe 49 bd 00 00 00 00 00 fc ff df e8 60 a0 95 f8 4c 89 f0 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 f7 e8 1a bf da f8 41 bf 58 09 00 00 4d
RSP: 0018:ffffc90003bf79b0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff88802bd40090 RCX: ffff888021fd9dc0
RDX: 0000000000000000 RSI: ffff88802bd40090 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff88807c2b9deb R09: 1ffff1100f8573bd
R10: dffffc0000000000 R11: ffffed100f8573be R12: 1ffff9200077ef6b
R13: dffffc0000000000 R14: 0000000000000000 R15: dffffc0000000000
FS:  00007f7d45cd26c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7d466df540 CR3: 00000000731d9000 CR4: 00000000003506f0
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:1422
 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:1147
 sock_ioctl+0x4d2/0x710 net/socket.c:1266
 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: 0033:0x7f7d46691e59
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:00007f7d45cd2028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f7d4690b090 RCX: 00007f7d46691e59
RDX: 0000200000000000 RSI: 00000000400448c9 RDI: 0000000000000004
RBP: 00007f7d46727d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7d4690b128 R14: 00007f7d4690b090 R15: 00007fff09377118
 </TASK>
Modules linked in:
---[ end trace 2ba0965e6c899a9b ]---
RIP: 0010:l2cap_unregister_user+0x27/0x1a0 net/bluetooth/l2cap_core.c:1869
Code: 1f 40 00 55 41 57 41 56 41 55 41 54 53 50 48 89 f3 49 89 fe 49 bd 00 00 00 00 00 fc ff df e8 60 a0 95 f8 4c 89 f0 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 f7 e8 1a bf da f8 41 bf 58 09 00 00 4d
RSP: 0018:ffffc90003bf79b0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff88802bd40090 RCX: ffff888021fd9dc0
RDX: 0000000000000000 RSI: ffff88802bd40090 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff88807c2b9deb R09: 1ffff1100f8573bd
R10: dffffc0000000000 R11: ffffed100f8573be R12: 1ffff9200077ef6b
R13: dffffc0000000000 R14: 0000000000000000 R15: dffffc0000000000
FS:  00007f7d45cd26c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff3b25c4ff8 CR3: 00000000731d9000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	40 00 55 41          	rex add %dl,0x41(%rbp)
   4:	57                   	push   %rdi
   5:	41 56                	push   %r14
   7:	41 55                	push   %r13
   9:	41 54                	push   %r12
   b:	53                   	push   %rbx
   c:	50                   	push   %rax
   d:	48 89 f3             	mov    %rsi,%rbx
  10:	49 89 fe             	mov    %rdi,%r14
  13:	49 bd 00 00 00 00 00 	movabs $0xdffffc0000000000,%r13
  1a:	fc ff df
  1d:	e8 60 a0 95 f8       	call   0xf895a082
  22:	4c 89 f0             	mov    %r14,%rax
  25:	48 c1 e8 03          	shr    $0x3,%rax
* 29:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1) <-- trapping instruction
  2e:	74 08                	je     0x38
  30:	4c 89 f7             	mov    %r14,%rdi
  33:	e8 1a bf da f8       	call   0xf8dabf52
  38:	41 bf 58 09 00 00    	mov    $0x958,%r15d
  3e:	4d                   	rex.WRB