BUG: unable to handle page fault for address: fffffffffffffffc
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 7012067 P4D 7012067 PUD 7014067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 306 Comm: syz-executor125 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:__lookup_slow+0x2ca/0x410 fs/namei.c:1697
Code: 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 cb 67 f4 ff 48 8b 7c 24 08 4c 89 ee 8b 54 24 04 4c 8b 1b 41 ba 4f 27 89 b6 <45> 03 53 fc 74 02 0f 0b 41 ff d3 48 89 c3 43 0f b6 04 26 84 c0 0f
RSP: 0018:ffffc90000db79e0 EFLAGS: 00010246
RAX: 1ffffffff0b6c788 RBX: ffffffff85b63c40 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff8881004f3550 RDI: ffff888117da00d0
RBP: ffffc90000db7ab0 R08: ffffffff87bd14af R09: 1ffffffff0f7a295
R10: 00000000b689274f R11: 0000000000000000 R12: dffffc0000000000
R13: ffff8881004f3550 R14: 1ffff1102009e6aa R15: 1ffff920001b6f40
FS:  000055555d88c480(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffffffffffc CR3: 0000000122750000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 lookup_one_len+0x19d/0x2e0 fs/namei.c:2747
 incfs_lookup_dentry+0x60/0xb0 fs/incfs/data_mgmt.c:210
 ioctl_create_file fs/incfs/pseudo_files.c:556 [inline]
 pending_reads_dispatch_ioctl+0x1612/0x1e60 fs/incfs/pseudo_files.c:1030
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0x12f/0x1b0 fs/ioctl.c:856
 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:856
 x64_sys_call+0x58b/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:17
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f526aadec89
Code: c0 79 93 eb d5 48 8d 7c 1d 00 eb 99 0f 1f 44 00 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 d8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffe8349e7a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f526ab3e1b9 RCX: 00007f526aadec89
RDX: 00002000000000c0 RSI: 00000000c058671e RDI: 0000000000000005
RBP: 00007f526ab3e189 R08: 00007f526ab3fe3d R09: 00007f526ab3fe3d
R10: 00007f526ab3fe3d R11: 0000000000000246 R12: 00007f526ab3fe3d
R13: 00007f526ab3e0f1 R14: 00007f526ab6bbc0 R15: 0000000000000002
 </TASK>
Modules linked in:
CR2: fffffffffffffffc
---[ end trace 0000000000000000 ]---
RIP: 0010:__lookup_slow+0x2ca/0x410 fs/namei.c:1697
Code: 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 cb 67 f4 ff 48 8b 7c 24 08 4c 89 ee 8b 54 24 04 4c 8b 1b 41 ba 4f 27 89 b6 <45> 03 53 fc 74 02 0f 0b 41 ff d3 48 89 c3 43 0f b6 04 26 84 c0 0f
RSP: 0018:ffffc90000db79e0 EFLAGS: 00010246
RAX: 1ffffffff0b6c788 RBX: ffffffff85b63c40 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff8881004f3550 RDI: ffff888117da00d0
RBP: ffffc90000db7ab0 R08: ffffffff87bd14af R09: 1ffffffff0f7a295
R10: 00000000b689274f R11: 0000000000000000 R12: dffffc0000000000
R13: ffff8881004f3550 R14: 1ffff1102009e6aa R15: 1ffff920001b6f40
FS:  000055555d88c480(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffffffffffc CR3: 0000000122750000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	89 d8                	mov    %ebx,%eax
   2:	48 c1 e8 03          	shr    $0x3,%rax
   6:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1)
   b:	74 08                	je     0x15
   d:	48 89 df             	mov    %rbx,%rdi
  10:	e8 cb 67 f4 ff       	call   0xfff467e0
  15:	48 8b 7c 24 08       	mov    0x8(%rsp),%rdi
  1a:	4c 89 ee             	mov    %r13,%rsi
  1d:	8b 54 24 04          	mov    0x4(%rsp),%edx
  21:	4c 8b 1b             	mov    (%rbx),%r11
  24:	41 ba 4f 27 89 b6    	mov    $0xb689274f,%r10d
* 2a:	45 03 53 fc          	add    -0x4(%r11),%r10d <-- trapping instruction
  2e:	74 02                	je     0x32
  30:	0f 0b                	ud2
  32:	41 ff d3             	call   *%r11
  35:	48 89 c3             	mov    %rax,%rbx
  38:	43 0f b6 04 26       	movzbl (%r14,%r12,1),%eax
  3d:	84 c0                	test   %al,%al
  3f:	0f                   	.byte 0xf