Oops: general protection fault, probably for non-canonical address 0xe000[ 1316.220201][T12744] Oops: general protection fault, probably for non-canonical address 0xe000abc800000038: 0000 [#1] SMP KASAN PTI
KASAN: maybe wild-memory-access in range [0x00057e40000001c0-0x00057e40000001c7]
CPU: 1 UID: 0 PID: 12744 Comm: syz.2.1544 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:kernfs_root+0xcb/0x230 fs/kernfs/kernfs-internal.h:76
Code: a0 cb 1b 8b be 4b 03 00 00 48 c7 c2 e0 cb 1b 8b e8 ba 3f 49 ff 49 bc 00 00 00 00 00 fc ff df 4d 8d 7e 30 4c 89 f8 48 c1 e8 03 <42> 80 3c 20 00 74 08 4c 89 ff e8 76 c6 ca ff 4d 8b 3f e8 ee 4c a4
RSP: 0018:ffffc9000125fa28 EFLAGS: 00010202
RAX: 0000afc800000038 RBX: ffffffff8252eaec RCX: 0000000000080000
RDX: ffffc9000e563000 RSI: 00000000000005c5 RDI: 00000000000005c6
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1e3ac47 R12: dffffc0000000000
R13: dffffc0000000000 R14: 00057e4000000190 R15: 00057e40000001c0
FS:  00007f958b5266c0(0000) GS:ffff8881269bc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000008000 CR3: 000000005837e000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 kernfs_remove_by_name_ns+0x2b/0x130 fs/kernfs/dir.c:1711
 remove_bind_files drivers/base/bus.c:605 [inline]
 bus_remove_driver+0x19b/0x300 drivers/base/bus.c:743
 comedi_device_detach_locked+0x175/0x750 drivers/comedi/drivers.c:207
 do_devconfig_ioctl drivers/comedi/comedi_fops.c:848 [inline]
 comedi_unlocked_ioctl+0xce4/0x1020 drivers/comedi/comedi_fops.c:2178
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:598 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:584
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f958d2beec9
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:00007f958b526038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f958d515fa0 RCX: 00007f958d2beec9
RDX: 0000000000000000 RSI: 0000000040946400 RDI: 0000000000000006
RBP: 00007f958d341f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f958d516038 R14: 00007f958d515fa0 R15: 00007ffd2b96be48
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:kernfs_root+0xcb/0x230 fs/kernfs/kernfs-internal.h:76
Code: a0 cb 1b 8b be 4b 03 00 00 48 c7 c2 e0 cb 1b 8b e8 ba 3f 49 ff 49 bc 00 00 00 00 00 fc ff df 4d 8d 7e 30 4c 89 f8 48 c1 e8 03 <42> 80 3c 20 00 74 08 4c 89 ff e8 76 c6 ca ff 4d 8b 3f e8 ee 4c a4
RSP: 0018:ffffc9000125fa28 EFLAGS: 00010202
RAX: 0000afc800000038 RBX: ffffffff8252eaec RCX: 0000000000080000
RDX: ffffc9000e563000 RSI: 00000000000005c5 RDI: 00000000000005c6
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1e3ac47 R12: dffffc0000000000
R13: dffffc0000000000 R14: 00057e4000000190 R15: 00057e40000001c0
FS:  00007f958b5266c0(0000) GS:ffff8881268bc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31c16ff8 CR3: 000000005837e000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	a0 cb 1b 8b be 4b 03 	movabs 0x34bbe8b1bcb,%al
   7:	00 00
   9:	48 c7 c2 e0 cb 1b 8b 	mov    $0xffffffff8b1bcbe0,%rdx
  10:	e8 ba 3f 49 ff       	call   0xff493fcf
  15:	49 bc 00 00 00 00 00 	movabs $0xdffffc0000000000,%r12
  1c:	fc ff df
  1f:	4d 8d 7e 30          	lea    0x30(%r14),%r15
  23:	4c 89 f8             	mov    %r15,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	4c 89 ff             	mov    %r15,%rdi
  34:	e8 76 c6 ca ff       	call   0xffcac6af
  39:	4d 8b 3f             	mov    (%r15),%r15
  3c:	e8                   	.byte 0xe8
  3d:	ee                   	out    %al,(%dx)
  3e:	4c a4                	rex.WR movsb %ds:(%rsi),%es:(%rdi)