comedi comedi1: pcl818: I/O port conflict (0x2f00,16)
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000005: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000028-0x000000000000002f]
CPU: 0 UID: 0 PID: 24677 Comm: syz.0.3292 Not tainted 6.16.0-syzkaller-11895-gcca7a0aae895 #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:pcl818_ai_cancel+0x69/0x3f0
Code: 8b 1b 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 29 02 37 f9 48 8b 03 48 89 04 24 49 83 c4 28 4c 89 e0 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 e7 e8 08 02 37 f9 4d 8b 24 24 48 83 c3
RSP: 0018:ffffc90002e3f9f8 EFLAGS: 00010206
RAX: 0000000000000005 RBX: ffff88801b7ee680 RCX: ffff888107ca1cc0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888106a97800
RBP: 0000000000000001 R08: ffff888106a9792f R09: 1ffff11020d52f25
R10: dffffc0000000000 R11: ffffffff88ebee90 R12: 0000000000000028
R13: dffffc0000000000 R14: ffff888106a97800 R15: dffffc0000000000
FS:  00007f09ccac16c0(0000) GS:ffff8880b8624000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f09ccac0fc8 CR3: 000000003ee98000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 pcl818_detach+0x66/0xd0
 comedi_device_detach_locked+0x178/0x750
 comedi_device_attach+0x5d4/0x720
 comedi_unlocked_ioctl+0x5ff/0x1020
 __se_sys_ioctl+0xfc/0x170
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f09cbb8ebe9
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:00007f09ccac1038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f09cbdb6090 RCX: 00007f09cbb8ebe9
RDX: 0000200000000300 RSI: 0000000040946400 RDI: 0000000000000007
RBP: 00007f09cbc11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f09cbdb6128 R14: 00007f09cbdb6090 R15: 00007ffe03e51c88
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:pcl818_ai_cancel+0x69/0x3f0
Code: 8b 1b 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 29 02 37 f9 48 8b 03 48 89 04 24 49 83 c4 28 4c 89 e0 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 e7 e8 08 02 37 f9 4d 8b 24 24 48 83 c3
RSP: 0018:ffffc90002e3f9f8 EFLAGS: 00010206
RAX: 0000000000000005 RBX: ffff88801b7ee680 RCX: ffff888107ca1cc0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888106a97800
RBP: 0000000000000001 R08: ffff888106a9792f R09: 1ffff11020d52f25
R10: dffffc0000000000 R11: ffffffff88ebee90 R12: 0000000000000028
R13: dffffc0000000000 R14: ffff888106a97800 R15: dffffc0000000000
FS:  00007f09ccac16c0(0000) GS:ffff8880b8624000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f09ccac0fc8 CR3: 000000003ee98000 CR4: 00000000000006f0
