syzbot

general protection fault, probably for non-canonical address 0xdffffc000000005f: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x00000000000002f8-0x00000000000002ff]
CPU: 0 PID: 5964 Comm: syz.0.21 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:h5_recv+0x147/0x8c0 drivers/bluetooth/hci_h5.c:572
Code: 18 48 c1 ea 03 48 89 54 24 28 48 89 d8 48 c1 e8 03 48 89 44 24 50 44 89 64 24 14 48 b8 00 00 00 00 00 fc ff df 48 8b 4c 24 30 <80> 3c 01 00 74 08 4c 89 ef e8 7b d7 57 fa 4d 8b 65 00 31 ff 4c 89
RSP: 0018:ffffc90003207c60 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 00000000000002e8 RCX: 000000000000005f
RDX: 000000000000005e RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90003207d80 R08: ffff888060213c1f R09: 1ffff1100c042783
R10: dffffc0000000000 R11: ffffed100c042784 R12: 0000000000000001
R13: 00000000000002f8 R14: ffff888060213c10 R15: ffffc90003207e20
FS:  00007f9a8ea076c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9a8ea06f98 CR3: 00000000761d0000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 hci_uart_tty_receive+0x188/0x210 drivers/bluetooth/hci_ldisc.c:624
 tiocsti+0x23e/0x2c0 drivers/tty/tty_io.c:2291
 tty_ioctl+0x62e/0xdd0 drivers/tty/tty_io.c:2693
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:871 [inline]
 __se_sys_ioctl+0xfd/0x170 fs/ioctl.c:857
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f9a8db8f749
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:00007f9a8ea07038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f9a8dde6090 RCX: 00007f9a8db8f749
RDX: 0000200000000040 RSI: 0000000000005412 RDI: 0000000000000003
RBP: 00007f9a8dc13f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9a8dde6128 R14: 00007f9a8dde6090 R15: 00007ffccba69c08
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:h5_recv+0x147/0x8c0 drivers/bluetooth/hci_h5.c:572
Code: 18 48 c1 ea 03 48 89 54 24 28 48 89 d8 48 c1 e8 03 48 89 44 24 50 44 89 64 24 14 48 b8 00 00 00 00 00 fc ff df 48 8b 4c 24 30 <80> 3c 01 00 74 08 4c 89 ef e8 7b d7 57 fa 4d 8b 65 00 31 ff 4c 89
RSP: 0018:ffffc90003207c60 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 00000000000002e8 RCX: 000000000000005f
RDX: 000000000000005e RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90003207d80 R08: ffff888060213c1f R09: 1ffff1100c042783
R10: dffffc0000000000 R11: ffffed100c042784 R12: 0000000000000001
R13: 00000000000002f8 R14: ffff888060213c10 R15: ffffc90003207e20
FS:  00007f9a8ea076c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c008405000 CR3: 00000000761d0000 CR4: 00000000003506f0
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	48 c1 ea 03          	shr    $0x3,%rdx
   4:	48 89 54 24 28       	mov    %rdx,0x28(%rsp)
   9:	48 89 d8             	mov    %rbx,%rax
   c:	48 c1 e8 03          	shr    $0x3,%rax
  10:	48 89 44 24 50       	mov    %rax,0x50(%rsp)
  15:	44 89 64 24 14       	mov    %r12d,0x14(%rsp)
  1a:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  21:	fc ff df
  24:	48 8b 4c 24 30       	mov    0x30(%rsp),%rcx
* 29:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1) <-- trapping instruction
  2d:	74 08                	je     0x37
  2f:	4c 89 ef             	mov    %r13,%rdi
  32:	e8 7b d7 57 fa       	call   0xfa57d7b2
  37:	4d 8b 65 00          	mov    0x0(%r13),%r12
  3b:	31 ff                	xor    %edi,%edi
  3d:	4c                   	rex.WR
  3e:	89                   	.byte 0x89