Oops: general protection fault, probably for non-canonical address 0xdffffc000000005f: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x00000000000002f8-0x00000000000002ff]
CPU: 0 UID: 0 PID: 6359 Comm: syz.0.18 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:h5_recv+0x189/0x920 drivers/bluetooth/hci_h5.c:572
Code: 8b 64 24 14 4c 8b 74 24 18 4d 89 fd 49 ff c6 41 ff cc 45 85 e4 0f 8e 82 05 00 00 e8 81 87 9f f9 4c 89 74 24 18 48 8b 44 24 48 <80> 3c 18 00 4c 8b 74 24 28 74 08 4c 89 f7 e8 54 ea 02 fa 4d 8b 36
RSP: 0018:ffffc90002ee7c20 EFLAGS: 00010202
RAX: 000000000000005f RBX: dffffc0000000000 RCX: 000000000000005f
RDX: 000000000000005d RSI: 000000000000005e RDI: 1ffff11004d2ba02
RBP: ffffc90002ee7d60 R08: ffff88802695d01f R09: 1ffff11004d2ba03
R10: dffffc0000000000 R11: ffffffff881d8750 R12: 0000000000000001
R13: ffff88802695d000 R14: ffffc90002ee7e00 R15: ffffc90002ee7e00
FS:  00007f6c456256c0(0000) GS:ffff8881266d6000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6c45624f98 CR3: 000000007e036000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 hci_uart_tty_receive+0x194/0x220 drivers/bluetooth/hci_ldisc.c:627
 tiocsti+0x23c/0x2c0 drivers/tty/tty_io.c:2290
 tty_ioctl+0x626/0xde0 drivers/tty/tty_io.c:2706
 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+0x8a/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f6c4478f6c9
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:00007f6c45625038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f6c449e6090 RCX: 00007f6c4478f6c9
RDX: 0000200000000140 RSI: 0000000000005412 RDI: 0000000000000006
RBP: 00007f6c44811f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6c449e6128 R14: 00007f6c449e6090 R15: 00007fffd14e6458
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:h5_recv+0x189/0x920 drivers/bluetooth/hci_h5.c:572
Code: 8b 64 24 14 4c 8b 74 24 18 4d 89 fd 49 ff c6 41 ff cc 45 85 e4 0f 8e 82 05 00 00 e8 81 87 9f f9 4c 89 74 24 18 48 8b 44 24 48 <80> 3c 18 00 4c 8b 74 24 28 74 08 4c 89 f7 e8 54 ea 02 fa 4d 8b 36
RSP: 0018:ffffc90002ee7c20 EFLAGS: 00010202
RAX: 000000000000005f RBX: dffffc0000000000 RCX: 000000000000005f
RDX: 000000000000005d RSI: 000000000000005e RDI: 1ffff11004d2ba02
RBP: ffffc90002ee7d60 R08: ffff88802695d01f R09: 1ffff11004d2ba03
R10: dffffc0000000000 R11: ffffffff881d8750 R12: 0000000000000001
R13: ffff88802695d000 R14: ffffc90002ee7e00 R15: ffffc90002ee7e00
FS:  00007f6c456256c0(0000) GS:ffff8881266d6000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6c45624f98 CR3: 000000007e036000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	8b 64 24 14          	mov    0x14(%rsp),%esp
   4:	4c 8b 74 24 18       	mov    0x18(%rsp),%r14
   9:	4d 89 fd             	mov    %r15,%r13
   c:	49 ff c6             	inc    %r14
   f:	41 ff cc             	dec    %r12d
  12:	45 85 e4             	test   %r12d,%r12d
  15:	0f 8e 82 05 00 00    	jle    0x59d
  1b:	e8 81 87 9f f9       	call   0xf99f87a1
  20:	4c 89 74 24 18       	mov    %r14,0x18(%rsp)
  25:	48 8b 44 24 48       	mov    0x48(%rsp),%rax
* 2a:	80 3c 18 00          	cmpb   $0x0,(%rax,%rbx,1) <-- trapping instruction
  2e:	4c 8b 74 24 28       	mov    0x28(%rsp),%r14
  33:	74 08                	je     0x3d
  35:	4c 89 f7             	mov    %r14,%rdi
  38:	e8 54 ea 02 fa       	call   0xfa02ea91
  3d:	4d 8b 36             	mov    (%r14),%r14