comedi comedi3: c6xdigio: a I/O base address must be specified
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Unexpected driver unregister!
WARNING: drivers/base/driver.c:273 at 0x0, CPU#3: syz.1.5/6039
Modules linked in:
CPU: 3 UID: 0 PID: 6039 Comm: syz.1.5 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 42 38 8c fc 48 89 df e8 1a 94 ff ff 5b 5d e9 83 01 e3 fb e8 7e 01 e3 fb 48 8d 3d b7 5a 96 0a <67> 48 0f b9 3a 5b 5d e9 6b 01 e3 fb e8 56 8c 4a fc eb 9a e8 4f 8c
RSP: 0018:ffffc9000408f760 EFLAGS: 00010283
RAX: 0000000000001179 RBX: ffffffff8fd3dfa0 RCX: ffffc9000c001000
RDX: 0000000000080000 RSI: ffffffff85da1fb2 RDI: ffffffff90707a70
RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 000000000000001e R12: ffffffff8fd3dee0
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff888044ddd800
FS:  0000000000000000(0000) GS:ffff888097ca8000(0063) knlGS:00000000f54adb40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f72dcce0 CR3: 000000006a7e0000 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+0x7c/0x370 arch/x86/entry/syscall_32.c:306
 do_fast_syscall_32+0x32/0x80 arch/x86/entry/syscall_32.c:331
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf70bd579
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:00000000f54ad55c EFLAGS: 00000296 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000040946400
RDX: 0000000080000080 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 42 38 8c fc       	call   0xfc8c3851
   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 83 01 e3 fb       	jmp    0xfbe301a1
  1e:	e8 7e 01 e3 fb       	call   0xfbe301a1
  23:	48 8d 3d b7 5a 96 0a 	lea    0xa965ab7(%rip),%rdi        # 0xa965ae1
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	5b                   	pop    %rbx
  30:	5d                   	pop    %rbp
  31:	e9 6b 01 e3 fb       	jmp    0xfbe301a1
  36:	e8 56 8c 4a fc       	call   0xfc4a8c91
  3b:	eb 9a                	jmp    0xffffffd7
  3d:	e8                   	.byte 0xe8
  3e:	4f                   	rex.WRXB
  3f:	8c                   	.byte 0x8c