comedi comedi1: c6xdigio: I/O port conflict (0x401,3)
Oops: general protection fault, probably for non-canonical address 0xe0000c1fcff10c28: 0000 [#1] SMP KASAN NOPTI
KASAN: maybe wild-memory-access in range [0x000080fe7f886140-0x000080fe7f886147]
CPU: 0 UID: 0 PID: 28595 Comm: syz.4.4954 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:kernfs_root+0x67/0x2a0 fs/kernfs/kernfs-internal.h:76
Code: 89 c6 e8 bc a3 5a ff 58 85 db 0f 85 b7 00 00 00 e8 6e a8 5a ff 48 8d 7d 30 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 1a 02 00 00 48 8b 5d 30 e8 26 cb 33 09 31 ff 41
RSP: 0000:ffffc9000492f920 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffffc9000e2de000
RDX: 0000101fcff10c28 RSI: ffffffff8260f512 RDI: 000080fe7f886140
RBP: 000080fe7f886110 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff8c427440
R13: 0000000000000000 R14: 0000000000000000 R15: ffff88814c881800
FS:  00007f21509f26c0(0000) GS:ffff8881246b2000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32513ff8 CR3: 0000000075d65000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 kernfs_remove_by_name_ns+0x2e/0x110 fs/kernfs/dir.c:1711
 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:1011
 do_devconfig_ioctl+0x1b1/0x710 drivers/comedi/comedi_fops.c:872
 comedi_unlocked_ioctl+0x165d/0x2f00 drivers/comedi/comedi_fops.c:2178
 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+0x18e/0x210 fs/ioctl.c:584
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x4e0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f214fb8ec29
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:00007f21509f2038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f214fdd6090 RCX: 00007f214fb8ec29
RDX: 0000200000000080 RSI: 0000000040946400 RDI: 0000000000000003
RBP: 00007f214fc11e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f214fdd6128 R14: 00007f214fdd6090 R15: 00007ffe71019058
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:kernfs_root+0x67/0x2a0 fs/kernfs/kernfs-internal.h:76
Code: 89 c6 e8 bc a3 5a ff 58 85 db 0f 85 b7 00 00 00 e8 6e a8 5a ff 48 8d 7d 30 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 1a 02 00 00 48 8b 5d 30 e8 26 cb 33 09 31 ff 41
RSP: 0000:ffffc9000492f920 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffffc9000e2de000
RDX: 0000101fcff10c28 RSI: ffffffff8260f512 RDI: 000080fe7f886140
RBP: 000080fe7f886110 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff8c427440
R13: 0000000000000000 R14: 0000000000000000 R15: ffff88814c881800
FS:  00007f21509f26c0(0000) GS:ffff8881246b2000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32513ff8 CR3: 0000000075d65000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	89 c6                	mov    %eax,%esi
   2:	e8 bc a3 5a ff       	call   0xff5aa3c3
   7:	58                   	pop    %rax
   8:	85 db                	test   %ebx,%ebx
   a:	0f 85 b7 00 00 00    	jne    0xc7
  10:	e8 6e a8 5a ff       	call   0xff5aa883
  15:	48 8d 7d 30          	lea    0x30(%rbp),%rdi
  19:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  20:	fc ff df
  23:	48 89 fa             	mov    %rdi,%rdx
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2e:	0f 85 1a 02 00 00    	jne    0x24e
  34:	48 8b 5d 30          	mov    0x30(%rbp),%rbx
  38:	e8 26 cb 33 09       	call   0x933cb63
  3d:	31 ff                	xor    %edi,%edi
  3f:	41                   	rex.B