BUG: unable to handle page fault for address: ffffed101bb5d53a
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 23ffee067 P4D 23ffee067 PUD 13fff6067 PMD 0 
Oops: Oops: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 6680 Comm: syz.0.27 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:le32_add_cpu include/linux/byteorder/generic.h:151 [inline]
RIP: 0010:udf_add_fid_counter fs/udf/namei.c:-1 [inline]
RIP: 0010:udf_unlink+0x39e/0x6b0 fs/udf/namei.c:561
Code: 03 43 80 3c 26 00 74 08 4c 89 ff e8 4c a0 eb fe bf c0 00 00 00 49 03 3f 31 f6 e8 1d 0b d9 07 48 83 c3 20 48 89 d8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 01 02 00 00 ff 0b 43 80 3c 26 00 74 08
RSP: 0018:ffffc9000439fbc0 EFLAGS: 00010a06
RAX: 1ffff1101bb5d53a RBX: ffff8880ddaea9d0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8b7e73e0 RDI: 00000000ffffffff
RBP: ffffc9000439fd60 R08: ffffffff8f35e277 R09: 1ffffffff1e6bc4e
R10: dffffc0000000000 R11: fffffbfff1e6bc4f R12: dffffc0000000000
R13: ffff888058c48158 R14: 1ffff1100f6374c8 R15: ffff88807b1ba640
FS:  00007f7a88a356c0(0000) GS:ffff88812669e000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffed101bb5d53a CR3: 00000000239a4000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 vfs_unlink+0x390/0x650 fs/namei.c:4586
 do_unlinkat+0x341/0x560 fs/namei.c:4650
 __do_sys_unlink fs/namei.c:4696 [inline]
 __se_sys_unlink fs/namei.c:4694 [inline]
 __x64_sys_unlink+0x43/0x50 fs/namei.c:4694
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x86/0x2e0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f7a87b8eba9
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:00007f7a88a35038 EFLAGS: 00000246 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 00007f7a87dd6090 RCX: 00007f7a87b8eba9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000080
RBP: 00007f7a87c11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7a87dd6128 R14: 00007f7a87dd6090 R15: 00007ffe2feec6e8
 </TASK>
Modules linked in:
CR2: ffffed101bb5d53a
---[ end trace 0000000000000000 ]---
RIP: 0010:le32_add_cpu include/linux/byteorder/generic.h:151 [inline]
RIP: 0010:udf_add_fid_counter fs/udf/namei.c:-1 [inline]
RIP: 0010:udf_unlink+0x39e/0x6b0 fs/udf/namei.c:561
Code: 03 43 80 3c 26 00 74 08 4c 89 ff e8 4c a0 eb fe bf c0 00 00 00 49 03 3f 31 f6 e8 1d 0b d9 07 48 83 c3 20 48 89 d8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 01 02 00 00 ff 0b 43 80 3c 26 00 74 08
RSP: 0018:ffffc9000439fbc0 EFLAGS: 00010a06
RAX: 1ffff1101bb5d53a RBX: ffff8880ddaea9d0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8b7e73e0 RDI: 00000000ffffffff
RBP: ffffc9000439fd60 R08: ffffffff8f35e277 R09: 1ffffffff1e6bc4e
R10: dffffc0000000000 R11: fffffbfff1e6bc4f R12: dffffc0000000000
R13: ffff888058c48158 R14: 1ffff1100f6374c8 R15: ffff88807b1ba640
FS:  00007f7a88a356c0(0000) GS:ffff88812669e000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffed101bb5d53a CR3: 00000000239a4000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	03 43 80             	add    -0x80(%rbx),%eax
   3:	3c 26                	cmp    $0x26,%al
   5:	00 74 08 4c          	add    %dh,0x4c(%rax,%rcx,1)
   9:	89 ff                	mov    %edi,%edi
   b:	e8 4c a0 eb fe       	call   0xfeeba05c
  10:	bf c0 00 00 00       	mov    $0xc0,%edi
  15:	49 03 3f             	add    (%r15),%rdi
  18:	31 f6                	xor    %esi,%esi
  1a:	e8 1d 0b d9 07       	call   0x7d90b3c
  1f:	48 83 c3 20          	add    $0x20,%rbx
  23:	48 89 d8             	mov    %rbx,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 0f b6 04 20       	movzbl (%rax,%r12,1),%eax <-- trapping instruction
  2f:	84 c0                	test   %al,%al
  31:	0f 85 01 02 00 00    	jne    0x238
  37:	ff 0b                	decl   (%rbx)
  39:	43 80 3c 26 00       	cmpb   $0x0,(%r14,%r12,1)
  3e:	74 08                	je     0x48