input: Bluetooth HID Boot Protocol Device as /devices/virtual/bluetooth/hci4/hci4:200/input653
Oops: general protection fault, probably for non-canonical address 0xdffffc000000005e: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x00000000000002f0-0x00000000000002f7]
CPU: 1 UID: 0 PID: 7535 Comm: syz.1.880 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:611 [inline]
RIP: 0010:__mutex_lock+0x14d/0x1420 kernel/locking/mutex.c:794
Code: e0 23 4d 9a 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 ff 10 00 00 83 3d 31 3b 91 0e 00 75 23 49 8d 7c 24 58 48 89 f8 48 c1 e8 03 <42> 80 3c 28 00 74 05 e8 97 f1 73 f6 4d 39 64 24 58 0f 85 2b 10 00
RSP: 0018:ffffc9000c99f7c0 EFLAGS: 00010202
RAX: 000000000000005e RBX: 1ffff92001933f10 RCX: ffffffff9a4d2303
RDX: 0000000000000000 RSI: ffffffff8e37db44 RDI: 00000000000002f0
RBP: ffffc9000c99f980 R08: ffffc9000c99f8e7 R09: 0000000000000000
R10: ffffc9000c99f8c0 R11: fffff52001933f1d R12: 0000000000000298
R13: dffffc0000000000 R14: ffff888055328090 R15: 0000000000000000
FS:  00005555605f6500(0000) GS:ffff888125304000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff9c8472140 CR3: 000000007ec4a000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 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:1312
 sock_ioctl+0x5c6/0x7f0 net/socket.c:1433
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl+0xfc/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: 0033:0x7ffbf699c819
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:00007ffd0a8bcec8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007ffbf6c15fa0 RCX: 00007ffbf699c819
RDX: 0000200000000000 RSI: 00000000400448c9 RDI: 0000000000000004
RBP: 00007ffbf6a32c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffbf6c15fac R14: 00007ffbf6c15fa0 R15: 00007ffbf6c15fa0
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:611 [inline]
RIP: 0010:__mutex_lock+0x14d/0x1420 kernel/locking/mutex.c:794
Code: e0 23 4d 9a 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 ff 10 00 00 83 3d 31 3b 91 0e 00 75 23 49 8d 7c 24 58 48 89 f8 48 c1 e8 03 <42> 80 3c 28 00 74 05 e8 97 f1 73 f6 4d 39 64 24 58 0f 85 2b 10 00
RSP: 0018:ffffc9000c99f7c0 EFLAGS: 00010202
RAX: 000000000000005e RBX: 1ffff92001933f10 RCX: ffffffff9a4d2303
RDX: 0000000000000000 RSI: ffffffff8e37db44 RDI: 00000000000002f0
RBP: ffffc9000c99f980 R08: ffffc9000c99f8e7 R09: 0000000000000000
R10: ffffc9000c99f8c0 R11: fffff52001933f1d R12: 0000000000000298
R13: dffffc0000000000 R14: ffff888055328090 R15: 0000000000000000
FS:  00005555605f6500(0000) GS:ffff888125204000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff8cebe7158 CR3: 000000007ec4a000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	e0 23                	loopne 0x25
   2:	4d 9a                	rex.WRB (bad)
   4:	48 c1 e8 03          	shr    $0x3,%rax
   8:	42 0f b6 04 28       	movzbl (%rax,%r13,1),%eax
   d:	84 c0                	test   %al,%al
   f:	0f 85 ff 10 00 00    	jne    0x1114
  15:	83 3d 31 3b 91 0e 00 	cmpl   $0x0,0xe913b31(%rip)        # 0xe913b4d
  1c:	75 23                	jne    0x41
  1e:	49 8d 7c 24 58       	lea    0x58(%r12),%rdi
  23:	48 89 f8             	mov    %rdi,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1) <-- trapping instruction
  2f:	74 05                	je     0x36
  31:	e8 97 f1 73 f6       	call   0xf673f1cd
  36:	4d 39 64 24 58       	cmp    %r12,0x58(%r12)
  3b:	0f                   	.byte 0xf
  3c:	85 2b                	test   %ebp,(%rbx)
  3e:	10 00                	adc    %al,(%rax)