BUG: unable to handle page fault for address: ffffffffffffff90
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD e949067 P4D e949067 PUD e94b067 PMD 0 
Oops: Oops: 0002 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 26134 Comm: syz.2.36465 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:parport_attach+0xab/0x930
Code: 80 3c 2c 00 74 08 4c 89 ff e8 c1 09 0a f9 41 0f b7 17 31 c0 ee 43 80 3c 2c 00 74 08 4c 89 ff e8 ab 09 0a f9 41 8b 17 83 c2 02 <31> 66 90 49 83 c6 18 4d 89 f7 49 c1 ef 03 43 0f b6 04 2f 84 c0 0f
RSP: 0018:ffffc9000833f9e8 EFLAGS: 00010202
RAX: 0000000000000000 RBX: ffff88816c1cf000 RCX: 0000000000000002
RDX: 0000000000002f02 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffc9000833f8a7 R09: 0000000000000000
R10: ffffc9000833f898 R11: fffff52001067f15 R12: 1ffff1102d839e38
R13: dffffc0000000000 R14: ffffc9000833fb60 R15: ffff88816c1cf1c0
FS:  00007fc46291a6c0(0000) GS:ffff88818d94d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffff90 CR3: 0000000104b32000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 comedi_device_attach+0x52d/0x720
 comedi_unlocked_ioctl+0x8ef/0x1af0
 __se_sys_ioctl+0xfc/0x170
 do_syscall_64+0x174/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc46199e019
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fc46291a028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fc461c25fa0 RCX: 00007fc46199e019
RDX: 0000200000000300 RSI: 0000000040946400 RDI: 0000000000000004
RBP: 00007fc461a3500c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc461c26038 R14: 00007fc461c25fa0 R15: 00007ffd69a45158
 </TASK>
Modules linked in:
CR2: ffffffffffffff90
---[ end trace 0000000000000000 ]---
RIP: 0010:parport_attach+0xab/0x930
Code: 80 3c 2c 00 74 08 4c 89 ff e8 c1 09 0a f9 41 0f b7 17 31 c0 ee 43 80 3c 2c 00 74 08 4c 89 ff e8 ab 09 0a f9 41 8b 17 83 c2 02 <31> 66 90 49 83 c6 18 4d 89 f7 49 c1 ef 03 43 0f b6 04 2f 84 c0 0f
RSP: 0018:ffffc9000833f9e8 EFLAGS: 00010202
RAX: 0000000000000000 RBX: ffff88816c1cf000 RCX: 0000000000000002
RDX: 0000000000002f02 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffc9000833f8a7 R09: 0000000000000000
R10: ffffc9000833f898 R11: fffff52001067f15 R12: 1ffff1102d839e38
R13: dffffc0000000000 R14: ffffc9000833fb60 R15: ffff88816c1cf1c0
FS:  00007fc46291a6c0(0000) GS:ffff88818d94d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffff90 CR3: 0000000104b32000 CR4: 00000000000006f0
