Oops: general protection fault, probably for non-canonical address 0xdffffc0000000021: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000108-0x000000000000010f]
CPU: 0 UID: 0 PID: 6963 Comm: syz.3.224 Not tainted 6.14.0-syzkaller-12966-ga2cc6ff5ec8f #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:bcsp_recv+0x130/0x18a0 drivers/bluetooth/hci_bcsp.c:590
Code: 03 48 89 44 24 40 48 89 c8 48 89 0c 24 48 c1 e9 03 48 89 4c 24 30 48 89 54 24 18 4c 89 74 24 20 48 89 5c 24 10 48 8b 44 24 40 <42> 80 3c 38 00 74 08 48 89 df e8 11 65 46 f9 48 8b 1b 31 ff 48 89
RSP: 0018:ffffc9001c71fc20 EFLAGS: 00010202
RAX: 0000000000000021 RBX: 0000000000000108 RCX: 000000000000002f
RDX: 0000000000000182 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9001c71fd60 R08: ffffffff88e4754c R09: 1ffff11006105503
R10: dffffc0000000000 R11: ffffffff88e47480 R12: 0000000000000001
R13: ffffc9001c71fe00 R14: 0000000000000110 R15: dffffc0000000000
FS:  00007fd75df3b6c0(0000) GS:ffff888124fcc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555583642808 CR3: 000000007f732000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 hci_uart_tty_receive+0x197/0x220 drivers/bluetooth/hci_ldisc.c:627
 tiocsti+0x24f/0x310 drivers/tty/tty_io.c:2299
 tty_ioctl+0x516/0xdc0 drivers/tty/tty_io.c:2716
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:906 [inline]
 __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:892
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd75d18d169
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:00007fd75df3b038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fd75d3a6080 RCX: 00007fd75d18d169
RDX: 0000200000000300 RSI: 0000000000005412 RDI: 0000000000000006
RBP: 00007fd75d20e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fd75d3a6080 R15: 00007ffd5c7da6c8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:bcsp_recv+0x130/0x18a0 drivers/bluetooth/hci_bcsp.c:590
Code: 03 48 89 44 24 40 48 89 c8 48 89 0c 24 48 c1 e9 03 48 89 4c 24 30 48 89 54 24 18 4c 89 74 24 20 48 89 5c 24 10 48 8b 44 24 40 <42> 80 3c 38 00 74 08 48 89 df e8 11 65 46 f9 48 8b 1b 31 ff 48 89
RSP: 0018:ffffc9001c71fc20 EFLAGS: 00010202
RAX: 0000000000000021 RBX: 0000000000000108 RCX: 000000000000002f
RDX: 0000000000000182 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9001c71fd60 R08: ffffffff88e4754c R09: 1ffff11006105503
R10: dffffc0000000000 R11: ffffffff88e47480 R12: 0000000000000001
R13: ffffc9001c71fe00 R14: 0000000000000110 R15: dffffc0000000000
FS:  00007fd75df3b6c0(0000) GS:ffff888124fcc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555583642808 CR3: 000000007f732000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	03 48 89             	add    -0x77(%rax),%ecx
   3:	44 24 40             	rex.R and $0x40,%al
   6:	48 89 c8             	mov    %rcx,%rax
   9:	48 89 0c 24          	mov    %rcx,(%rsp)
   d:	48 c1 e9 03          	shr    $0x3,%rcx
  11:	48 89 4c 24 30       	mov    %rcx,0x30(%rsp)
  16:	48 89 54 24 18       	mov    %rdx,0x18(%rsp)
  1b:	4c 89 74 24 20       	mov    %r14,0x20(%rsp)
  20:	48 89 5c 24 10       	mov    %rbx,0x10(%rsp)
  25:	48 8b 44 24 40       	mov    0x40(%rsp),%rax
* 2a:	42 80 3c 38 00       	cmpb   $0x0,(%rax,%r15,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	48 89 df             	mov    %rbx,%rdi
  34:	e8 11 65 46 f9       	call   0xf946654a
  39:	48 8b 1b             	mov    (%rbx),%rbx
  3c:	31 ff                	xor    %edi,%edi
  3e:	48                   	rex.W
  3f:	89                   	.byte 0x89