comedi comedi3: c6xdigio: I/O port conflict (0x4f2c,3)
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kernfs: can not remove 'bind', no directory
WARNING: CPU: 0 PID: 18215 at fs/kernfs/dir.c:1706 kernfs_remove_by_name_ns+0xff/0x110 fs/kernfs/dir.c:1706
Modules linked in:
CPU: 0 UID: 0 PID: 18215 Comm: syz.3.3933 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:kernfs_remove_by_name_ns+0xff/0x110 fs/kernfs/dir.c:1706
Code: 48 89 df 31 db e8 61 a2 ff ff 48 89 ef e8 69 a5 35 ff eb b1 e8 32 33 5a ff 90 48 c7 c7 c0 5d c3 8b 4c 89 e6 e8 a2 d3 18 ff 90 <0f> 0b 90 90 eb b4 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90
RSP: 0018:ffffc90003867940 EFLAGS: 00010282
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc9002aef7000
RDX: 0000000000080000 RSI: ffffffff817a3365 RDI: 0000000000000001
RBP: ffffffff8f500420 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 203a73666e72656b R12: ffffffff8c4268e0
R13: 0000000000000000 R14: 0000000000000000 R15: ffff888025631000
FS:  00007f9eef15a6c0(0000) GS:ffff8880d66bc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2a5555 CR3: 0000000051e2b000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 sysfs_remove_file include/linux/sysfs.h:777 [inline]
 driver_remove_file drivers/base/driver.c:201 [inline]
 driver_remove_file+0x4a/0x60 drivers/base/driver.c:197
 remove_bind_files drivers/base/bus.c:605 [inline]
 bus_remove_driver+0x224/0x2c0 drivers/base/bus.c:743
 driver_unregister+0x76/0xb0 drivers/base/driver.c:277
 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:1010
 do_devconfig_ioctl+0x1b1/0x710 drivers/comedi/comedi_fops.c:872
 comedi_unlocked_ioctl+0x165d/0x2f00 drivers/comedi/comedi_fops.c:2173
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:598 [inline]
 __se_sys_ioctl fs/ioctl.c:584 [inline]
 __x64_sys_ioctl+0x18b/0x210 fs/ioctl.c:584
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9eee38ebe9
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:00007f9eef15a038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f9eee5b5fa0 RCX: 00007f9eee38ebe9
RDX: 0000200000000280 RSI: 0000000040946400 RDI: 0000000000000004
RBP: 00007f9eee411e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9eee5b6038 R14: 00007f9eee5b5fa0 R15: 00007ffeda403d68
 </TASK>