comedi comedi0: c6xdigio: I/O port conflict (0x109,3)
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Unexpected driver unregister!
WARNING: drivers/base/driver.c:273 at 0x0, CPU#1: syz.3.1856/13742
Modules linked in:
CPU: 1 UID: 0 PID: 13742 Comm: syz.3.1856 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
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 02 cc 88 fc 48 89 df e8 1a 94 ff ff 5b 5d e9 03 0b df fb e8 fe 0a df fb 48 8d 3d a7 5e b3 0a <67> 48 0f b9 3a 5b 5d e9 eb 0a df fb e8 06 1e 47 fc eb 9a e8 ff 1d
RSP: 0018:ffffc90003ebf760 EFLAGS: 00010287
RAX: 0000000000001260 RBX: ffffffff8ff4f8e0 RCX: ffffc9000cd11000
RDX: 0000000000080000 RSI: ffffffff85de6bd2 RDI: ffffffff9091ca80
RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 00000000aebc109e R12: ffffffff8ff4f820
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8880448ab800
FS:  0000000000000000(0000) GS:ffff888097870000(0063) knlGS:00000000f5436b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f7300bb4 CR3: 0000000058f27000 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: 0023:0xf7f41579
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:00000000f543655c EFLAGS: 00000296 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000040946400
RDX: 0000000080000540 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 02 cc 88 fc       	call   0xfc88cc11
   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 03 0b df fb       	jmp    0xfbdf0b21
  1e:	e8 fe 0a df fb       	call   0xfbdf0b21
  23:	48 8d 3d a7 5e b3 0a 	lea    0xab35ea7(%rip),%rdi        # 0xab35ed1
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	5b                   	pop    %rbx
  30:	5d                   	pop    %rbp
  31:	e9 eb 0a df fb       	jmp    0xfbdf0b21
  36:	e8 06 1e 47 fc       	call   0xfc471e41
  3b:	eb 9a                	jmp    0xffffffd7
  3d:	e8                   	.byte 0xe8
  3e:	ff                   	.byte 0xff
  3f:	1d                   	.byte 0x1d