BUG: unable to handle page fault for address: ffffffffffffffff
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD e186067 P4D e186067 PUD e188067 PMD 0 
Oops: Oops: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 22477 Comm: syz.1.2664 Tainted: G     U              6.15.0-rc1-syzkaller-00333-g5aaaedb0cb54 #0 PREEMPT(full) 
Tainted: [U]=USER
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:dvb_device_open+0x11b/0x3b0 drivers/media/dvb-core/dvbdev.c:103
Code: 18 4d 85 ed 0f 84 0e 02 00 00 e8 30 41 f2 f9 4c 89 ea 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 3d 02 00 00 <49> 8b 7d 00 e8 7c 3e dc f9 31 ff 89 c3 89 c6 e8 e1 3b f2 f9 84 db
RSP: 0018:ffffc90001587920 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc900123e5000
RDX: 1fffffffffffffff RSI: ffffffff87c8fb90 RDI: ffff888144684618
RBP: ffff888144684600 R08: 0000000000000001 R09: fffffbfff1f42ed9
R10: ffffffff8fa176cf R11: 0000000000000000 R12: ffff888033da9c00
R13: ffffffffffffffff R14: ffff88802a755668 R15: ffff888033da9c48
FS:  00007f3d0c7a96c0(0000) GS:ffff888124ab9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffff CR3: 000000003fa18000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 chrdev_open+0x231/0x6a0 fs/char_dev.c:414
 do_dentry_open+0x741/0x1c10 fs/open.c:956
 vfs_open+0x82/0x3f0 fs/open.c:1086
 do_open fs/namei.c:3845 [inline]
 path_openat+0x1e5e/0x2d40 fs/namei.c:4004
 do_filp_open+0x20b/0x470 fs/namei.c:4031
 do_sys_openat2+0x11b/0x1d0 fs/open.c:1429
 do_sys_open fs/open.c:1444 [inline]
 __do_sys_openat fs/open.c:1460 [inline]
 __se_sys_openat fs/open.c:1455 [inline]
 __x64_sys_openat+0x174/0x210 fs/open.c:1455
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3d0b98d169
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:00007f3d0c7a9038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f3d0bba5fa0 RCX: 00007f3d0b98d169
RDX: 0000000000000000 RSI: 0000200000000000 RDI: ffffffffffffff9c
RBP: 00007f3d0ba0e990 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f3d0bba5fa0 R15: 00007fffd20b8268
 </TASK>
Modules linked in:
CR2: ffffffffffffffff
---[ end trace 0000000000000000 ]---
RIP: 0010:dvb_device_open+0x11b/0x3b0 drivers/media/dvb-core/dvbdev.c:103
Code: 18 4d 85 ed 0f 84 0e 02 00 00 e8 30 41 f2 f9 4c 89 ea 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 3d 02 00 00 <49> 8b 7d 00 e8 7c 3e dc f9 31 ff 89 c3 89 c6 e8 e1 3b f2 f9 84 db
RSP: 0018:ffffc90001587920 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc900123e5000
RDX: 1fffffffffffffff RSI: ffffffff87c8fb90 RDI: ffff888144684618
RBP: ffff888144684600 R08: 0000000000000001 R09: fffffbfff1f42ed9
R10: ffffffff8fa176cf R11: 0000000000000000 R12: ffff888033da9c00
R13: ffffffffffffffff R14: ffff88802a755668 R15: ffff888033da9c48
FS:  00007f3d0c7a96c0(0000) GS:ffff888124ab9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffff CR3: 000000003fa18000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	18 4d 85             	sbb    %cl,-0x7b(%rbp)
   3:	ed                   	in     (%dx),%eax
   4:	0f 84 0e 02 00 00    	je     0x218
   a:	e8 30 41 f2 f9       	call   0xf9f2413f
   f:	4c 89 ea             	mov    %r13,%rdx
  12:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  19:	fc ff df
  1c:	48 c1 ea 03          	shr    $0x3,%rdx
  20:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
  24:	0f 85 3d 02 00 00    	jne    0x267
* 2a:	49 8b 7d 00          	mov    0x0(%r13),%rdi <-- trapping instruction
  2e:	e8 7c 3e dc f9       	call   0xf9dc3eaf
  33:	31 ff                	xor    %edi,%edi
  35:	89 c3                	mov    %eax,%ebx
  37:	89 c6                	mov    %eax,%esi
  39:	e8 e1 3b f2 f9       	call   0xf9f23c1f
  3e:	84 db                	test   %bl,%bl