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: 5721 Comm: syz-executor.0 Not tainted 6.4.0-rc4-syzkaller-00276-ge5282a7d8f6b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
RIP: 0010:hci_uart_tty_ioctl+0x2a0/0xa20 drivers/bluetooth/hci_ldisc.c:774
Code: d2 f9 49 81 c4 b8 00 00 00 4c 89 e0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 e7 e8 7b b0 2c fa 49 8b 1c 24 48 89 d8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 65 06 00 00 8b 2b e9 39 07 00 00 e8 27
RSP: 0018:ffffc90006467e40 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff888020f19dc0
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffff888015e9a5f8 R08: ffffffff87b86d10 R09: ffffed1005099804
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8880284cc0b8
R13: dffffc0000000000 R14: ffff888015e9a000 R15: 0000000000000000
FS:  00007ff8cc887700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff8cbbad988 CR3: 0000000071b02000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 tty_ioctl+0x88e/0xbd0 drivers/tty/tty_io.c:2786
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7ff8cba8c169
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ff8cc887168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007ff8cbbac050 RCX: 00007ff8cba8c169
RDX: 0000000000000000 RSI: 00000000800455c9 RDI: 0000000000000003
RBP: 00007ff8cbae7ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffcf7e28f4f R14: 00007ff8cc887300 R15: 0000000000022000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:hci_uart_tty_ioctl+0x2a0/0xa20 drivers/bluetooth/hci_ldisc.c:774
Code: d2 f9 49 81 c4 b8 00 00 00 4c 89 e0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 e7 e8 7b b0 2c fa 49 8b 1c 24 48 89 d8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 65 06 00 00 8b 2b e9 39 07 00 00 e8 27
RSP: 0018:ffffc90006467e40 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff888020f19dc0
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffff888015e9a5f8 R08: ffffffff87b86d10 R09: ffffed1005099804
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8880284cc0b8
R13: dffffc0000000000 R14: ffff888015e9a000 R15: 0000000000000000
FS:  00007ff8cc887700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff8cc887718 CR3: 0000000071b02000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	d2 f9                	sar    %cl,%cl
   2:	49 81 c4 b8 00 00 00 	add    $0xb8,%r12
   9:	4c 89 e0             	mov    %r12,%rax
   c:	48 c1 e8 03          	shr    $0x3,%rax
  10:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1)
  15:	74 08                	je     0x1f
  17:	4c 89 e7             	mov    %r12,%rdi
  1a:	e8 7b b0 2c fa       	callq  0xfa2cb09a
  1f:	49 8b 1c 24          	mov    (%r12),%rbx
  23:	48 89 d8             	mov    %rbx,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 0f b6 04 28       	movzbl (%rax,%r13,1),%eax <-- trapping instruction
  2f:	84 c0                	test   %al,%al
  31:	0f 85 65 06 00 00    	jne    0x69c
  37:	8b 2b                	mov    (%rbx),%ebp
  39:	e9 39 07 00 00       	jmpq   0x777
  3e:	e8                   	.byte 0xe8
  3f:	27                   	(bad)