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#0: syz.0.0/5335
Modules linked in:
CPU: 0 UID: 0 PID: 5335 Comm: syz.0.0 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+0x8d/0xa0 drivers/base/driver.c:273
Code: 73 68 4c 89 f7 e8 83 f6 97 fc 48 89 df 5b 41 5e 41 5f e9 e6 55 ff ff e8 d1 64 f3 fb eb 05 e8 ca 64 f3 fb 48 8d 3d 43 06 bf 09 <67> 48 0f b9 3a 5b 41 5e 41 5f c3 cc cc cc cc cc cc cc cc 90 90 90
RSP: 0018:ffffc9000d477a20 EFLAGS: 00010283
RAX: ffffffff85cdf656 RBX: ffffffff8f1d8180 RCX: 0000000000100000
RDX: ffffc9000f6f2000 RSI: 000000000000087b RDI: ffffffff8f8cfca0
RBP: 0000000000000001 R08: ffff88803e7d612f R09: 1ffff11007cfac25
R10: dffffc0000000000 R11: ffffffff88bed5c0 R12: ffff88803e7d6038
R13: ffffffff8f1d80d0 R14: 0000000000000000 R15: dffffc0000000000
FS:  00007f81bf05e6c0(0000) GS:ffff88808d683000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f81be3d3e08 CR3: 0000000019ed4000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 comedi_device_detach_locked+0x178/0x750 drivers/comedi/drivers.c:207
 comedi_device_detach drivers/comedi/drivers.c:215 [inline]
 comedi_device_attach+0x5d4/0x720 drivers/comedi/drivers.c:1011
 do_devconfig_ioctl drivers/comedi/comedi_fops.c:872 [inline]
 comedi_unlocked_ioctl+0x5ff/0x1020 drivers/comedi/comedi_fops.c:2178
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f81be18f7c9
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:00007f81bf05e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f81be3e5fa0 RCX: 00007f81be18f7c9
RDX: 0000200000000080 RSI: 0000000040946400 RDI: 0000000000000003
RBP: 00007f81be213f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f81be3e6038 R14: 00007f81be3e5fa0 R15: 00007ffe59fd60f8
 </TASK>
----------------
Code disassembly (best guess):
   0:	73 68                	jae    0x6a
   2:	4c 89 f7             	mov    %r14,%rdi
   5:	e8 83 f6 97 fc       	call   0xfc97f68d
   a:	48 89 df             	mov    %rbx,%rdi
   d:	5b                   	pop    %rbx
   e:	41 5e                	pop    %r14
  10:	41 5f                	pop    %r15
  12:	e9 e6 55 ff ff       	jmp    0xffff55fd
  17:	e8 d1 64 f3 fb       	call   0xfbf364ed
  1c:	eb 05                	jmp    0x23
  1e:	e8 ca 64 f3 fb       	call   0xfbf364ed
  23:	48 8d 3d 43 06 bf 09 	lea    0x9bf0643(%rip),%rdi        # 0x9bf066d
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	5b                   	pop    %rbx
  30:	41 5e                	pop    %r14
  32:	41 5f                	pop    %r15
  34:	c3                   	ret
  35:	cc                   	int3
  36:	cc                   	int3
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	cc                   	int3
  3c:	cc                   	int3
  3d:	90                   	nop
  3e:	90                   	nop
  3f:	90                   	nop