BUG: kernel NULL pointer dereference, address: 00000000000002f8
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 800000011570f067 P4D 800000011570f067 PUD 0 
Oops: Oops: 0000 [#1] PREEMPT SMP PTI
CPU: 0 UID: 0 PID: 6116 Comm: syz.4.221 Not tainted 6.13.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:h5_recv+0x6a/0x270 drivers/bluetooth/hci_h5.c:572
Code: be 01 00 00 00 e8 e6 6c 37 00 0f b6 0b 88 08 48 ff 8d f8 02 00 00 0f 1f 44 00 00 49 ff c7 41 ff cc 45 85 e4 0f 8e ba 01 00 00 <48> 83 bd f8 02 00 00 00 74 25 41 0f b6 37 81 fe c0 00 00 00 75 40
RSP: 0018:ffffc9000555be00 EFLAGS: 00010202
RAX: ffffffff838ad110 RBX: ffff88810d433600 RCX: 0000000000000001
RDX: 0000000000000001 RSI: ffffc9000555be87 RDI: ffff88810d433600
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff827bebb0 R12: 0000000000000001
R13: ffffc9000555be07 R14: ffff88810d433600 R15: ffffc9000555be87
FS:  00007fdd265d96c0(0000) GS:ffff88813ba00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000000002f8 CR3: 0000000106ff2000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 hci_uart_tty_receive+0x13a/0x200 drivers/bluetooth/hci_ldisc.c:622
 tiocsti+0xc5/0x110 drivers/tty/tty_io.c:2299
 tty_ioctl+0x4f5/0x660 drivers/tty/tty_io.c:2717
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:906 [inline]
 __se_sys_ioctl+0x68/0xb0 fs/ioctl.c:892
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x8d/0x190 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdd2578cde9
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:00007fdd265d9038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fdd259a6160 RCX: 00007fdd2578cde9
RDX: 0000400000000040 RSI: 0000000000005412 RDI: 0000000000000006
RBP: 00007fdd2580e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fdd259a6160 R15: 00007ffd4e425938
 </TASK>
Modules linked in:
CR2: 00000000000002f8
---[ end trace 0000000000000000 ]---
RIP: 0010:h5_recv+0x6a/0x270 drivers/bluetooth/hci_h5.c:572
Code: be 01 00 00 00 e8 e6 6c 37 00 0f b6 0b 88 08 48 ff 8d f8 02 00 00 0f 1f 44 00 00 49 ff c7 41 ff cc 45 85 e4 0f 8e ba 01 00 00 <48> 83 bd f8 02 00 00 00 74 25 41 0f b6 37 81 fe c0 00 00 00 75 40
RSP: 0018:ffffc9000555be00 EFLAGS: 00010202
RAX: ffffffff838ad110 RBX: ffff88810d433600 RCX: 0000000000000001
RDX: 0000000000000001 RSI: ffffc9000555be87 RDI: ffff88810d433600
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff827bebb0 R12: 0000000000000001
R13: ffffc9000555be07 R14: ffff88810d433600 R15: ffffc9000555be87
FS:  00007fdd265d96c0(0000) GS:ffff88813ba00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000000002f8 CR3: 0000000106ff2000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	be 01 00 00 00       	mov    $0x1,%esi
   5:	e8 e6 6c 37 00       	call   0x376cf0
   a:	0f b6 0b             	movzbl (%rbx),%ecx
   d:	88 08                	mov    %cl,(%rax)
   f:	48 ff 8d f8 02 00 00 	decq   0x2f8(%rbp)
  16:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  1b:	49 ff c7             	inc    %r15
  1e:	41 ff cc             	dec    %r12d
  21:	45 85 e4             	test   %r12d,%r12d
  24:	0f 8e ba 01 00 00    	jle    0x1e4
* 2a:	48 83 bd f8 02 00 00 	cmpq   $0x0,0x2f8(%rbp) <-- trapping instruction
  31:	00
  32:	74 25                	je     0x59
  34:	41 0f b6 37          	movzbl (%r15),%esi
  38:	81 fe c0 00 00 00    	cmp    $0xc0,%esi
  3e:	75 40                	jne    0x80