comedi comedi3: c6xdigio: I/O port conflict (0x8001,3)
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Unexpected driver unregister!
WARNING: drivers/base/driver.c:273 at 0x0, CPU#0: syz.8.6606/31524
Modules linked in:
CPU: 0 UID: 0 PID: 31524 Comm: syz.8.6606 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:driver_unregister drivers/base/driver.c:273 [inline]
RIP: 0010:driver_unregister+0x89/0xb0 drivers/base/driver.c:270
Code: 00 75 3a 48 8b 73 68 48 89 ef e8 c2 82 8b fc 48 89 df e8 1a 94 ff ff 5b 5d e9 c3 c1 e1 fb e8 be c1 e1 fb 48 8d 3d c7 44 b5 0a <67> 48 0f b9 3a 5b 5d e9 ab c1 e1 fb e8 c6 d4 49 fc eb 9a e8 bf d4
RSP: 0018:ffffc900077e7760 EFLAGS: 00010283
RAX: 0000000000001291 RBX: ffffffff8ff42fa0 RCX: ffffc9000d041000
RDX: 0000000000080000 RSI: ffffffff85dbb512 RDI: ffffffff9090f9e0
RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 00000000a413dbd3 R12: ffffffff8ff42ee0
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff88804a142000
FS:  0000000000000000(0000) GS:ffff88809778a000(0063) knlGS:00000000f544db40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 0000000030003ff8 CR3: 0000000049ad9000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 comedi_device_detach_locked+0x12f/0xa50 drivers/comedi/drivers.c:207
 comedi_device_detach+0x67/0xb0 drivers/comedi/drivers.c:215
 comedi_device_attach+0x43d/0x900 drivers/comedi/drivers.c:1011
 do_devconfig_ioctl+0x1b1/0x710 drivers/comedi/comedi_fops.c:872
 comedi_unlocked_ioctl+0x165d/0x2ee0 drivers/comedi/comedi_fops.c:2178
 comedi_compat_ioctl+0x1d0/0x960 drivers/comedi/comedi_fops.c:3249
 __do_compat_sys_ioctl fs/ioctl.c:695 [inline]
 __se_compat_sys_ioctl fs/ioctl.c:638 [inline]
 __ia32_compat_sys_ioctl+0x242/0x370 fs/ioctl.c:638
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
 __do_fast_syscall_32+0xe8/0x680 arch/x86/entry/syscall_32.c:307
 do_fast_syscall_32+0x32/0x80 arch/x86/entry/syscall_32.c:332
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf705d579
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f544d55c EFLAGS: 00000296 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000009 RCX: 0000000040946400
RDX: 0000000080000180 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
----------------
Code disassembly (best guess):
   0:	00 75 3a             	add    %dh,0x3a(%rbp)
   3:	48 8b 73 68          	mov    0x68(%rbx),%rsi
   7:	48 89 ef             	mov    %rbp,%rdi
   a:	e8 c2 82 8b fc       	call   0xfc8b82d1
   f:	48 89 df             	mov    %rbx,%rdi
  12:	e8 1a 94 ff ff       	call   0xffff9431
  17:	5b                   	pop    %rbx
  18:	5d                   	pop    %rbp
  19:	e9 c3 c1 e1 fb       	jmp    0xfbe1c1e1
  1e:	e8 be c1 e1 fb       	call   0xfbe1c1e1
  23:	48 8d 3d c7 44 b5 0a 	lea    0xab544c7(%rip),%rdi        # 0xab544f1
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	5b                   	pop    %rbx
  30:	5d                   	pop    %rbp
  31:	e9 ab c1 e1 fb       	jmp    0xfbe1c1e1
  36:	e8 c6 d4 49 fc       	call   0xfc49d501
  3b:	eb 9a                	jmp    0xffffffd7
  3d:	e8                   	.byte 0xe8
  3e:	bf                   	.byte 0xbf
  3f:	d4                   	(bad)